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.
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.
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
16 * Clean ups from Moschip version and a few ioctl implementations by:
17 * Paul B Schroeder <pschroeder "at" uplogix "dot" com>
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>
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 <linux/uaccess.h>
41 #define DRIVER_VERSION "1.3.1"
42 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
45 * 16C50 UART register defines
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 */
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 */
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 */
66 #define LCR_SET_BREAK 0x40 /* Set Break condition */
67 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
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 */
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 */
82 * Defines used for sending commands to port
85 #define WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */
86 #define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */
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
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)
103 #define MAX_NAME_LEN 64
105 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
106 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
108 /* For higher baud Rates use TIOCEXBAUD */
109 #define TIOCEXBAUD 0x5462
111 /* vendor id and device id defines */
113 /* The native mos7840/7820 component */
114 #define USB_VENDOR_ID_MOSCHIP 0x9710
115 #define MOSCHIP_DEVICE_ID_7840 0x7840
116 #define MOSCHIP_DEVICE_ID_7820 0x7820
117 /* The native component can have its vendor/device id's overridden
118 * in vendor-specific implementations. Such devices can be handled
119 * by making a change here, in moschip_port_id_table, and in
120 * moschip_id_table_combined
122 #define USB_VENDOR_ID_BANDB 0x0856
123 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
124 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
126 /* Interrupt Routine Defines */
128 #define SERIAL_IIR_RLS 0x06
129 #define SERIAL_IIR_MS 0x00
132 * Emulation of the bit mask on the LINE STATUS REGISTER.
134 #define SERIAL_LSR_DR 0x0001
135 #define SERIAL_LSR_OE 0x0002
136 #define SERIAL_LSR_PE 0x0004
137 #define SERIAL_LSR_FE 0x0008
138 #define SERIAL_LSR_BI 0x0010
140 #define MOS_MSR_DELTA_CTS 0x10
141 #define MOS_MSR_DELTA_DSR 0x20
142 #define MOS_MSR_DELTA_RI 0x40
143 #define MOS_MSR_DELTA_CD 0x80
145 /* Serial Port register Address */
146 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
147 #define FIFO_CONTROL_REGISTER ((__u16)(0x02))
148 #define LINE_CONTROL_REGISTER ((__u16)(0x03))
149 #define MODEM_CONTROL_REGISTER ((__u16)(0x04))
150 #define LINE_STATUS_REGISTER ((__u16)(0x05))
151 #define MODEM_STATUS_REGISTER ((__u16)(0x06))
152 #define SCRATCH_PAD_REGISTER ((__u16)(0x07))
153 #define DIVISOR_LATCH_LSB ((__u16)(0x00))
154 #define DIVISOR_LATCH_MSB ((__u16)(0x01))
156 #define CLK_MULTI_REGISTER ((__u16)(0x02))
157 #define CLK_START_VALUE_REGISTER ((__u16)(0x03))
159 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
162 * URB POOL related defines
164 #define NUM_URBS 16 /* URB Count */
165 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
168 static struct usb_device_id moschip_port_id_table
[] = {
169 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7840
)},
170 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7820
)},
171 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_4
)},
172 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_2
)},
173 {} /* terminating entry */
176 static __devinitdata
struct usb_device_id moschip_id_table_combined
[] = {
177 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7840
)},
178 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7820
)},
179 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_4
)},
180 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_2
)},
181 {} /* terminating entry */
184 MODULE_DEVICE_TABLE(usb
, moschip_id_table_combined
);
186 /* This structure holds all of the local port information */
188 struct moschip_port
{
189 int port_num
; /*Actual port number in the device(1,2,etc) */
190 struct urb
*write_urb
; /* write URB for this port */
191 struct urb
*read_urb
; /* read URB for this port */
193 __u8 shadowLCR
; /* last LCR value received */
194 __u8 shadowMCR
; /* last MCR value received */
198 wait_queue_head_t wait_chase
; /* for handling sleeping while waiting for chase to finish */
199 wait_queue_head_t delta_msr_wait
; /* for handling sleeping while waiting for msr change to happen */
201 struct async_icount icount
;
202 struct usb_serial_port
*port
; /* loop back to the owner of this object */
206 __u8 ControlRegOffset
;
208 /* for processing control URBS in interrupt context */
209 struct urb
*control_urb
;
210 struct usb_ctrlrequest
*dr
;
214 spinlock_t pool_lock
;
215 struct urb
*write_urb_pool
[NUM_URBS
];
223 * mos7840_set_reg_sync
224 * To set the Control register by calling usb_fill_control_urb function
225 * by passing usb_sndctrlpipe function as parameter.
228 static int mos7840_set_reg_sync(struct usb_serial_port
*port
, __u16 reg
,
231 struct usb_device
*dev
= port
->serial
->dev
;
233 dbg("mos7840_set_reg_sync offset is %x, value %x\n", reg
, val
);
235 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), MCS_WRREQ
,
236 MCS_WR_RTYPE
, val
, reg
, NULL
, 0,
241 * mos7840_get_reg_sync
242 * To set the Uart register by calling usb_fill_control_urb function by
243 * passing usb_rcvctrlpipe function as parameter.
246 static int mos7840_get_reg_sync(struct usb_serial_port
*port
, __u16 reg
,
249 struct usb_device
*dev
= port
->serial
->dev
;
252 ret
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0), MCS_RDREQ
,
253 MCS_RD_RTYPE
, 0, reg
, val
, VENDOR_READ_LENGTH
,
255 dbg("mos7840_get_reg_sync offset is %x, return val %x\n", reg
, *val
);
256 *val
= (*val
) & 0x00ff;
261 * mos7840_set_uart_reg
262 * To set the Uart register by calling usb_fill_control_urb function by
263 * passing usb_sndctrlpipe function as parameter.
266 static int mos7840_set_uart_reg(struct usb_serial_port
*port
, __u16 reg
,
270 struct usb_device
*dev
= port
->serial
->dev
;
272 /* For the UART control registers, the application number need
274 if (port
->serial
->num_ports
== 4) {
275 val
|= (((__u16
) port
->number
-
276 (__u16
) (port
->serial
->minor
)) + 1) << 8;
277 dbg("mos7840_set_uart_reg application number is %x\n", val
);
279 if (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) == 0) {
280 val
|= (((__u16
) port
->number
-
281 (__u16
) (port
->serial
->minor
)) + 1) << 8;
282 dbg("mos7840_set_uart_reg application number is %x\n",
286 (((__u16
) port
->number
-
287 (__u16
) (port
->serial
->minor
)) + 2) << 8;
288 dbg("mos7840_set_uart_reg application number is %x\n",
292 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), MCS_WRREQ
,
293 MCS_WR_RTYPE
, val
, reg
, NULL
, 0,
299 * mos7840_get_uart_reg
300 * To set the Control register by calling usb_fill_control_urb function
301 * by passing usb_rcvctrlpipe function as parameter.
303 static int mos7840_get_uart_reg(struct usb_serial_port
*port
, __u16 reg
,
306 struct usb_device
*dev
= port
->serial
->dev
;
310 /* dbg("application number is %4x \n",
311 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
312 /* Wval is same as application number */
313 if (port
->serial
->num_ports
== 4) {
315 (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) +
317 dbg("mos7840_get_uart_reg application number is %x\n", Wval
);
319 if (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) == 0) {
320 Wval
= (((__u16
) port
->number
-
321 (__u16
) (port
->serial
->minor
)) + 1) << 8;
322 dbg("mos7840_get_uart_reg application number is %x\n",
325 Wval
= (((__u16
) port
->number
-
326 (__u16
) (port
->serial
->minor
)) + 2) << 8;
327 dbg("mos7840_get_uart_reg application number is %x\n",
331 ret
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0), MCS_RDREQ
,
332 MCS_RD_RTYPE
, Wval
, reg
, val
, VENDOR_READ_LENGTH
,
334 *val
= (*val
) & 0x00ff;
338 static void mos7840_dump_serial_port(struct moschip_port
*mos7840_port
)
341 dbg("***************************************\n");
342 dbg("SpRegOffset is %2x\n", mos7840_port
->SpRegOffset
);
343 dbg("ControlRegOffset is %2x \n", mos7840_port
->ControlRegOffset
);
344 dbg("DCRRegOffset is %2x \n", mos7840_port
->DcrRegOffset
);
345 dbg("***************************************\n");
349 /************************************************************************/
350 /************************************************************************/
351 /* I N T E R F A C E F U N C T I O N S */
352 /* I N T E R F A C E F U N C T I O N S */
353 /************************************************************************/
354 /************************************************************************/
356 static inline void mos7840_set_port_private(struct usb_serial_port
*port
,
357 struct moschip_port
*data
)
359 usb_set_serial_port_data(port
, (void *)data
);
362 static inline struct moschip_port
*mos7840_get_port_private(struct
366 return (struct moschip_port
*)usb_get_serial_port_data(port
);
369 static void mos7840_handle_new_msr(struct moschip_port
*port
, __u8 new_msr
)
371 struct moschip_port
*mos7840_port
;
372 struct async_icount
*icount
;
374 icount
= &mos7840_port
->icount
;
376 (MOS_MSR_DELTA_CTS
| MOS_MSR_DELTA_DSR
| MOS_MSR_DELTA_RI
|
378 icount
= &mos7840_port
->icount
;
380 /* update input line counters */
381 if (new_msr
& MOS_MSR_DELTA_CTS
) {
385 if (new_msr
& MOS_MSR_DELTA_DSR
) {
389 if (new_msr
& MOS_MSR_DELTA_CD
) {
393 if (new_msr
& MOS_MSR_DELTA_RI
) {
400 static void mos7840_handle_new_lsr(struct moschip_port
*port
, __u8 new_lsr
)
402 struct async_icount
*icount
;
404 dbg("%s - %02x", __func__
, new_lsr
);
406 if (new_lsr
& SERIAL_LSR_BI
) {
408 * Parity and Framing errors only count if they
409 * occur exclusive of a break being
412 new_lsr
&= (__u8
) (SERIAL_LSR_OE
| SERIAL_LSR_BI
);
415 /* update input line counters */
416 icount
= &port
->icount
;
417 if (new_lsr
& SERIAL_LSR_BI
) {
421 if (new_lsr
& SERIAL_LSR_OE
) {
425 if (new_lsr
& SERIAL_LSR_PE
) {
429 if (new_lsr
& SERIAL_LSR_FE
) {
435 /************************************************************************/
436 /************************************************************************/
437 /* U S B C A L L B A C K F U N C T I O N S */
438 /* U S B C A L L B A C K F U N C T I O N S */
439 /************************************************************************/
440 /************************************************************************/
442 static void mos7840_control_callback(struct urb
*urb
)
445 struct moschip_port
*mos7840_port
;
448 int status
= urb
->status
;
450 mos7840_port
= urb
->context
;
459 /* this urb is terminated, clean up */
460 dbg("%s - urb shutting down with status: %d", __func__
,
464 dbg("%s - nonzero urb status received: %d", __func__
,
469 dbg("%s urb buffer size is %d\n", __func__
, urb
->actual_length
);
470 dbg("%s mos7840_port->MsrLsr is %d port %d\n", __func__
,
471 mos7840_port
->MsrLsr
, mos7840_port
->port_num
);
472 data
= urb
->transfer_buffer
;
473 regval
= (__u8
) data
[0];
474 dbg("%s data is %x\n", __func__
, regval
);
475 if (mos7840_port
->MsrLsr
== 0)
476 mos7840_handle_new_msr(mos7840_port
, regval
);
477 else if (mos7840_port
->MsrLsr
== 1)
478 mos7840_handle_new_lsr(mos7840_port
, regval
);
481 spin_lock(&mos7840_port
->pool_lock
);
482 if (!mos7840_port
->zombie
)
483 result
= usb_submit_urb(mos7840_port
->int_urb
, GFP_ATOMIC
);
484 spin_unlock(&mos7840_port
->pool_lock
);
486 dev_err(&urb
->dev
->dev
,
487 "%s - Error %d submitting interrupt urb\n",
492 static int mos7840_get_reg(struct moschip_port
*mcs
, __u16 Wval
, __u16 reg
,
495 struct usb_device
*dev
= mcs
->port
->serial
->dev
;
496 struct usb_ctrlrequest
*dr
= mcs
->dr
;
497 unsigned char *buffer
= mcs
->ctrl_buf
;
500 dr
->bRequestType
= MCS_RD_RTYPE
;
501 dr
->bRequest
= MCS_RDREQ
;
502 dr
->wValue
= cpu_to_le16(Wval
); /* 0 */
503 dr
->wIndex
= cpu_to_le16(reg
);
504 dr
->wLength
= cpu_to_le16(2);
506 usb_fill_control_urb(mcs
->control_urb
, dev
, usb_rcvctrlpipe(dev
, 0),
507 (unsigned char *)dr
, buffer
, 2,
508 mos7840_control_callback
, mcs
);
509 mcs
->control_urb
->transfer_buffer_length
= 2;
510 ret
= usb_submit_urb(mcs
->control_urb
, GFP_ATOMIC
);
514 /*****************************************************************************
515 * mos7840_interrupt_callback
516 * this is the callback function for when we have received data on the
517 * interrupt endpoint.
518 *****************************************************************************/
520 static void mos7840_interrupt_callback(struct urb
*urb
)
524 struct moschip_port
*mos7840_port
;
525 struct usb_serial
*serial
;
530 __u16 wval
, wreg
= 0;
531 int status
= urb
->status
;
533 dbg("%s", " : Entering\n");
542 /* this urb is terminated, clean up */
543 dbg("%s - urb shutting down with status: %d", __func__
,
547 dbg("%s - nonzero urb status received: %d", __func__
,
552 length
= urb
->actual_length
;
553 data
= urb
->transfer_buffer
;
555 serial
= urb
->context
;
557 /* Moschip get 5 bytes
558 * Byte 1 IIR Port 1 (port.number is 0)
559 * Byte 2 IIR Port 2 (port.number is 1)
560 * Byte 3 IIR Port 3 (port.number is 2)
561 * Byte 4 IIR Port 4 (port.number is 3)
562 * Byte 5 FIFO status for both */
564 if (length
&& length
> 5) {
565 dbg("%s \n", "Wrong data !!!");
569 sp
[0] = (__u8
) data
[0];
570 sp
[1] = (__u8
) data
[1];
571 sp
[2] = (__u8
) data
[2];
572 sp
[3] = (__u8
) data
[3];
575 for (i
= 0; i
< serial
->num_ports
; i
++) {
576 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
578 (((__u16
) serial
->port
[i
]->number
-
579 (__u16
) (serial
->minor
)) + 1) << 8;
580 if (mos7840_port
->open
) {
582 dbg("SP%d No Interrupt !!!\n", i
);
584 switch (sp
[i
] & 0x0f) {
586 dbg("Serial Port %d: Receiver status error or ", i
);
587 dbg("address bit detected in 9-bit mode\n");
588 mos7840_port
->MsrLsr
= 1;
589 wreg
= LINE_STATUS_REGISTER
;
592 dbg("Serial Port %d: Modem status change\n", i
);
593 mos7840_port
->MsrLsr
= 0;
594 wreg
= MODEM_STATUS_REGISTER
;
597 spin_lock(&mos7840_port
->pool_lock
);
598 if (!mos7840_port
->zombie
) {
599 rv
= mos7840_get_reg(mos7840_port
, wval
, wreg
, &Data
);
601 spin_unlock(&mos7840_port
->pool_lock
);
604 spin_unlock(&mos7840_port
->pool_lock
);
609 /* the completion handler for the control urb will resubmit */
612 result
= usb_submit_urb(urb
, GFP_ATOMIC
);
614 dev_err(&urb
->dev
->dev
,
615 "%s - Error %d submitting interrupt urb\n",
620 static int mos7840_port_paranoia_check(struct usb_serial_port
*port
,
621 const char *function
)
624 dbg("%s - port == NULL", function
);
628 dbg("%s - port->serial == NULL", function
);
635 /* Inline functions to check the sanity of a pointer that is passed to us */
636 static int mos7840_serial_paranoia_check(struct usb_serial
*serial
,
637 const char *function
)
640 dbg("%s - serial == NULL", function
);
644 dbg("%s - serial->type == NULL!", function
);
651 static struct usb_serial
*mos7840_get_usb_serial(struct usb_serial_port
*port
,
652 const char *function
)
654 /* if no port was specified, or it fails a paranoia check */
656 mos7840_port_paranoia_check(port
, function
) ||
657 mos7840_serial_paranoia_check(port
->serial
, function
)) {
658 /* then say that we don't have a valid usb_serial thing,
659 * which will end up genrating -ENODEV return values */
666 /*****************************************************************************
667 * mos7840_bulk_in_callback
668 * this is the callback function for when we have received data on the
670 *****************************************************************************/
672 static void mos7840_bulk_in_callback(struct urb
*urb
)
676 struct usb_serial
*serial
;
677 struct usb_serial_port
*port
;
678 struct moschip_port
*mos7840_port
;
679 struct tty_struct
*tty
;
680 int status
= urb
->status
;
683 dbg("nonzero read bulk status received: %d", status
);
687 mos7840_port
= urb
->context
;
689 dbg("%s", "NULL mos7840_port pointer \n");
693 port
= (struct usb_serial_port
*)mos7840_port
->port
;
694 if (mos7840_port_paranoia_check(port
, __func__
)) {
695 dbg("%s", "Port Paranoia failed \n");
699 serial
= mos7840_get_usb_serial(port
, __func__
);
701 dbg("%s\n", "Bad serial pointer ");
705 dbg("%s\n", "Entering... \n");
707 data
= urb
->transfer_buffer
;
709 dbg("%s", "Entering ........... \n");
711 if (urb
->actual_length
) {
712 tty
= tty_port_tty_get(&mos7840_port
->port
->port
);
714 tty_buffer_request_room(tty
, urb
->actual_length
);
715 tty_insert_flip_string(tty
, data
, urb
->actual_length
);
717 tty_flip_buffer_push(tty
);
720 mos7840_port
->icount
.rx
+= urb
->actual_length
;
722 dbg("mos7840_port->icount.rx is %d:\n",
723 mos7840_port
->icount
.rx
);
726 if (!mos7840_port
->read_urb
) {
727 dbg("%s", "URB KILLED !!!\n");
732 mos7840_port
->read_urb
->dev
= serial
->dev
;
734 retval
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
737 dbg(" usb_submit_urb(read bulk) failed, retval = %d",
742 /*****************************************************************************
743 * mos7840_bulk_out_data_callback
744 * this is the callback function for when we have finished sending
745 * serial data on the bulk out endpoint.
746 *****************************************************************************/
748 static void mos7840_bulk_out_data_callback(struct urb
*urb
)
750 struct moschip_port
*mos7840_port
;
751 struct tty_struct
*tty
;
752 int status
= urb
->status
;
755 mos7840_port
= urb
->context
;
756 spin_lock(&mos7840_port
->pool_lock
);
757 for (i
= 0; i
< NUM_URBS
; i
++) {
758 if (urb
== mos7840_port
->write_urb_pool
[i
]) {
759 mos7840_port
->busy
[i
] = 0;
763 spin_unlock(&mos7840_port
->pool_lock
);
766 dbg("nonzero write bulk status received:%d\n", status
);
770 if (mos7840_port_paranoia_check(mos7840_port
->port
, __func__
)) {
771 dbg("%s", "Port Paranoia failed \n");
775 dbg("%s \n", "Entering .........");
777 tty
= tty_port_tty_get(&mos7840_port
->port
->port
);
778 if (tty
&& mos7840_port
->open
)
784 /************************************************************************/
785 /* 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 */
786 /************************************************************************/
787 #ifdef MCSSerialProbe
788 static int mos7840_serial_probe(struct usb_serial
*serial
,
789 const struct usb_device_id
*id
)
792 /*need to implement the mode_reg reading and updating\
793 structures usb_serial_ device_type\
794 (i.e num_ports, num_bulkin,bulkout etc) */
795 /* Also we can update the changes attach */
800 /*****************************************************************************
802 * this function is called by the tty driver when a port is opened
803 * If successful, we return 0
804 * Otherwise we return a negative error number.
805 *****************************************************************************/
807 static int mos7840_open(struct tty_struct
*tty
,
808 struct usb_serial_port
*port
, struct file
*filp
)
812 struct usb_serial
*serial
;
816 struct moschip_port
*mos7840_port
;
817 struct moschip_port
*port0
;
819 if (mos7840_port_paranoia_check(port
, __func__
)) {
820 dbg("%s", "Port Paranoia failed \n");
824 serial
= port
->serial
;
826 if (mos7840_serial_paranoia_check(serial
, __func__
)) {
827 dbg("%s", "Serial Paranoia failed \n");
831 mos7840_port
= mos7840_get_port_private(port
);
832 port0
= mos7840_get_port_private(serial
->port
[0]);
834 if (mos7840_port
== NULL
|| port0
== NULL
)
837 usb_clear_halt(serial
->dev
, port
->write_urb
->pipe
);
838 usb_clear_halt(serial
->dev
, port
->read_urb
->pipe
);
841 /* Initialising the write urb pool */
842 for (j
= 0; j
< NUM_URBS
; ++j
) {
843 urb
= usb_alloc_urb(0, GFP_KERNEL
);
844 mos7840_port
->write_urb_pool
[j
] = urb
;
847 dev_err(&port
->dev
, "No more urbs???\n");
851 urb
->transfer_buffer
= kmalloc(URB_TRANSFER_BUFFER_SIZE
,
853 if (!urb
->transfer_buffer
) {
855 mos7840_port
->write_urb_pool
[j
] = NULL
;
857 "%s-out of memory for urb buffers.\n",
863 /*****************************************************************************
864 * Initialize MCS7840 -- Write Init values to corresponding Registers
872 * 0x08 : SP1/2 Control Reg
873 *****************************************************************************/
875 /* NEED to check the following Block */
878 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
, &Data
);
880 dbg("Reading Spreg failed\n");
884 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
886 dbg("writing Spreg failed\n");
891 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
893 dbg("writing Spreg failed\n");
896 /* End of block to be checked */
899 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
902 dbg("Reading Controlreg failed\n");
905 Data
|= 0x08; /* Driver done bit */
906 Data
|= 0x20; /* rx_disable */
907 status
= mos7840_set_reg_sync(port
,
908 mos7840_port
->ControlRegOffset
, Data
);
910 dbg("writing Controlreg failed\n");
913 /* do register settings here */
914 /* Set all regs to the device default values. */
915 /***********************************
916 * First Disable all interrupts.
917 ***********************************/
919 status
= mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
921 dbg("disableing interrupts failed\n");
924 /* Set FIFO_CONTROL_REGISTER to the default value */
926 status
= mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
928 dbg("Writing FIFO_CONTROL_REGISTER failed\n");
933 status
= mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
935 dbg("Writing FIFO_CONTROL_REGISTER failed\n");
940 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
941 mos7840_port
->shadowLCR
= Data
;
944 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
945 mos7840_port
->shadowMCR
= Data
;
948 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
949 mos7840_port
->shadowLCR
= Data
;
951 Data
|= SERIAL_LCR_DLAB
; /* data latch enable in LCR 0x80 */
952 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
955 status
= mos7840_set_uart_reg(port
, DIVISOR_LATCH_LSB
, Data
);
958 status
= mos7840_set_uart_reg(port
, DIVISOR_LATCH_MSB
, Data
);
961 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
963 Data
= Data
& ~SERIAL_LCR_DLAB
;
964 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
965 mos7840_port
->shadowLCR
= Data
;
967 /* clearing Bulkin and Bulkout Fifo */
969 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
, &Data
);
972 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
975 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
976 /* Finally enable all interrupts */
978 status
= mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
980 /* clearing rx_disable */
982 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
985 status
= mos7840_set_reg_sync(port
, mos7840_port
->ControlRegOffset
,
990 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
993 status
= mos7840_set_reg_sync(port
, mos7840_port
->ControlRegOffset
,
996 /* force low_latency on so that our tty_push actually forces *
997 * the data through,otherwise it is scheduled, and with *
998 * high data rates (like with OHCI) data can get lost. */
1000 tty
->low_latency
= 1;
1002 /* Check to see if we've set up our endpoint info yet *
1003 * (can't set it up in mos7840_startup as the structures *
1004 * were not set up at that time.) */
1005 if (port0
->open_ports
== 1) {
1006 if (serial
->port
[0]->interrupt_in_buffer
== NULL
) {
1007 /* set up interrupt urb */
1008 usb_fill_int_urb(serial
->port
[0]->interrupt_in_urb
,
1010 usb_rcvintpipe(serial
->dev
,
1011 serial
->port
[0]->interrupt_in_endpointAddress
),
1012 serial
->port
[0]->interrupt_in_buffer
,
1013 serial
->port
[0]->interrupt_in_urb
->
1014 transfer_buffer_length
,
1015 mos7840_interrupt_callback
,
1017 serial
->port
[0]->interrupt_in_urb
->interval
);
1019 /* start interrupt read for mos7840 *
1020 * will continue as long as mos7840 is connected */
1023 usb_submit_urb(serial
->port
[0]->interrupt_in_urb
,
1026 dev_err(&port
->dev
, "%s - Error %d submitting "
1027 "interrupt urb\n", __func__
, response
);
1034 /* see if we've set up our endpoint info yet *
1035 * (can't set it up in mos7840_startup as the *
1036 * structures were not set up at that time.) */
1038 dbg("port number is %d \n", port
->number
);
1039 dbg("serial number is %d \n", port
->serial
->minor
);
1040 dbg("Bulkin endpoint is %d \n", port
->bulk_in_endpointAddress
);
1041 dbg("BulkOut endpoint is %d \n", port
->bulk_out_endpointAddress
);
1042 dbg("Interrupt endpoint is %d \n", port
->interrupt_in_endpointAddress
);
1043 dbg("port's number in the device is %d\n", mos7840_port
->port_num
);
1044 mos7840_port
->read_urb
= port
->read_urb
;
1046 /* set up our bulk in urb */
1048 usb_fill_bulk_urb(mos7840_port
->read_urb
,
1050 usb_rcvbulkpipe(serial
->dev
,
1051 port
->bulk_in_endpointAddress
),
1052 port
->bulk_in_buffer
,
1053 mos7840_port
->read_urb
->transfer_buffer_length
,
1054 mos7840_bulk_in_callback
, mos7840_port
);
1056 dbg("mos7840_open: bulkin endpoint is %d\n",
1057 port
->bulk_in_endpointAddress
);
1058 response
= usb_submit_urb(mos7840_port
->read_urb
, GFP_KERNEL
);
1060 dev_err(&port
->dev
, "%s - Error %d submitting control urb\n",
1061 __func__
, response
);
1064 /* initialize our wait queues */
1065 init_waitqueue_head(&mos7840_port
->wait_chase
);
1066 init_waitqueue_head(&mos7840_port
->delta_msr_wait
);
1068 /* initialize our icount structure */
1069 memset(&(mos7840_port
->icount
), 0x00, sizeof(mos7840_port
->icount
));
1071 /* initialize our port settings */
1072 /* Must set to enable ints! */
1073 mos7840_port
->shadowMCR
= MCR_MASTER_IE
;
1074 /* send a open port command */
1075 mos7840_port
->open
= 1;
1076 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1077 mos7840_port
->icount
.tx
= 0;
1078 mos7840_port
->icount
.rx
= 0;
1080 dbg("\n\nusb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p\n\n",
1081 serial
, mos7840_port
, port
);
1087 /*****************************************************************************
1088 * mos7840_chars_in_buffer
1089 * this function is called by the tty driver when it wants to know how many
1090 * bytes of data we currently have outstanding in the port (data that has
1091 * been written, but hasn't made it out the port yet)
1092 * If successful, we return the number of bytes left to be written in the
1094 * Otherwise we return zero.
1095 *****************************************************************************/
1097 static int mos7840_chars_in_buffer(struct tty_struct
*tty
)
1099 struct usb_serial_port
*port
= tty
->driver_data
;
1102 unsigned long flags
;
1103 struct moschip_port
*mos7840_port
;
1105 dbg("%s \n", " mos7840_chars_in_buffer:entering ...........");
1107 if (mos7840_port_paranoia_check(port
, __func__
)) {
1108 dbg("%s", "Invalid port \n");
1112 mos7840_port
= mos7840_get_port_private(port
);
1113 if (mos7840_port
== NULL
) {
1114 dbg("%s \n", "mos7840_break:leaving ...........");
1118 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1119 for (i
= 0; i
< NUM_URBS
; ++i
)
1120 if (mos7840_port
->busy
[i
])
1121 chars
+= URB_TRANSFER_BUFFER_SIZE
;
1122 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1123 dbg("%s - returns %d", __func__
, chars
);
1128 /************************************************************************
1130 * mos7840_block_until_tx_empty
1132 * This function will block the close until one of the following:
1134 * 2. The mos7840 has stopped
1135 * 3. A timeout of 3 seconds without activity has expired
1137 ************************************************************************/
1138 static void mos7840_block_until_tx_empty(struct tty_struct
*tty
,
1139 struct moschip_port
*mos7840_port
)
1141 int timeout
= HZ
/ 10;
1147 count
= mos7840_chars_in_buffer(tty
);
1149 /* Check for Buffer status */
1153 /* Block the thread for a while */
1154 interruptible_sleep_on_timeout(&mos7840_port
->wait_chase
,
1157 /* No activity.. count down section */
1160 dbg("%s - TIMEOUT", __func__
);
1163 /* Reset timeout value back to seconds */
1169 /*****************************************************************************
1171 * this function is called by the tty driver when a port is closed
1172 *****************************************************************************/
1174 static void mos7840_close(struct tty_struct
*tty
,
1175 struct usb_serial_port
*port
, struct file
*filp
)
1177 struct usb_serial
*serial
;
1178 struct moschip_port
*mos7840_port
;
1179 struct moschip_port
*port0
;
1183 dbg("%s\n", "mos7840_close:entering...");
1185 if (mos7840_port_paranoia_check(port
, __func__
)) {
1186 dbg("%s", "Port Paranoia failed \n");
1190 serial
= mos7840_get_usb_serial(port
, __func__
);
1192 dbg("%s", "Serial Paranoia failed \n");
1196 mos7840_port
= mos7840_get_port_private(port
);
1197 port0
= mos7840_get_port_private(serial
->port
[0]);
1199 if (mos7840_port
== NULL
|| port0
== NULL
)
1202 for (j
= 0; j
< NUM_URBS
; ++j
)
1203 usb_kill_urb(mos7840_port
->write_urb_pool
[j
]);
1205 /* Freeing Write URBs */
1206 for (j
= 0; j
< NUM_URBS
; ++j
) {
1207 if (mos7840_port
->write_urb_pool
[j
]) {
1208 if (mos7840_port
->write_urb_pool
[j
]->transfer_buffer
)
1209 kfree(mos7840_port
->write_urb_pool
[j
]->
1212 usb_free_urb(mos7840_port
->write_urb_pool
[j
]);
1217 /* flush and block until tx is empty */
1218 mos7840_block_until_tx_empty(tty
, mos7840_port
);
1220 /* While closing port, shutdown all bulk read, write *
1221 * and interrupt read if they exists */
1223 if (mos7840_port
->write_urb
) {
1224 dbg("%s", "Shutdown bulk write\n");
1225 usb_kill_urb(mos7840_port
->write_urb
);
1227 if (mos7840_port
->read_urb
) {
1228 dbg("%s", "Shutdown bulk read\n");
1229 usb_kill_urb(mos7840_port
->read_urb
);
1231 if ((&mos7840_port
->control_urb
)) {
1232 dbg("%s", "Shutdown control read\n");
1233 /*/ usb_kill_urb (mos7840_port->control_urb); */
1236 /* if(mos7840_port->ctrl_buf != NULL) */
1237 /* kfree(mos7840_port->ctrl_buf); */
1238 port0
->open_ports
--;
1239 dbg("mos7840_num_open_ports in close%d:in port%d\n",
1240 port0
->open_ports
, port
->number
);
1241 if (port0
->open_ports
== 0) {
1242 if (serial
->port
[0]->interrupt_in_urb
) {
1243 dbg("%s", "Shutdown interrupt_in_urb\n");
1244 usb_kill_urb(serial
->port
[0]->interrupt_in_urb
);
1248 if (mos7840_port
->write_urb
) {
1249 /* if this urb had a transfer buffer already (old tx) free it */
1250 if (mos7840_port
->write_urb
->transfer_buffer
!= NULL
)
1251 kfree(mos7840_port
->write_urb
->transfer_buffer
);
1252 usb_free_urb(mos7840_port
->write_urb
);
1256 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
1259 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
1261 mos7840_port
->open
= 0;
1263 dbg("%s \n", "Leaving ............");
1266 /************************************************************************
1268 * mos7840_block_until_chase_response
1270 * This function will block the close until one of the following:
1271 * 1. Response to our Chase comes from mos7840
1272 * 2. A timeout of 10 seconds without activity has expired
1273 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1275 ************************************************************************/
1277 static void mos7840_block_until_chase_response(struct tty_struct
*tty
,
1278 struct moschip_port
*mos7840_port
)
1280 int timeout
= 1 * HZ
;
1285 count
= mos7840_chars_in_buffer(tty
);
1287 /* Check for Buffer status */
1291 /* Block the thread for a while */
1292 interruptible_sleep_on_timeout(&mos7840_port
->wait_chase
,
1294 /* No activity.. count down section */
1297 dbg("%s - TIMEOUT", __func__
);
1300 /* Reset timeout value back to seconds */
1307 /*****************************************************************************
1309 * this function sends a break to the port
1310 *****************************************************************************/
1311 static void mos7840_break(struct tty_struct
*tty
, int break_state
)
1313 struct usb_serial_port
*port
= tty
->driver_data
;
1315 struct usb_serial
*serial
;
1316 struct moschip_port
*mos7840_port
;
1318 dbg("%s \n", "Entering ...........");
1319 dbg("mos7840_break: Start\n");
1321 if (mos7840_port_paranoia_check(port
, __func__
)) {
1322 dbg("%s", "Port Paranoia failed \n");
1326 serial
= mos7840_get_usb_serial(port
, __func__
);
1328 dbg("%s", "Serial Paranoia failed \n");
1332 mos7840_port
= mos7840_get_port_private(port
);
1334 if (mos7840_port
== NULL
)
1338 /* flush and block until tx is empty */
1339 mos7840_block_until_chase_response(tty
, mos7840_port
);
1341 if (break_state
== -1)
1342 data
= mos7840_port
->shadowLCR
| LCR_SET_BREAK
;
1344 data
= mos7840_port
->shadowLCR
& ~LCR_SET_BREAK
;
1346 mos7840_port
->shadowLCR
= data
;
1347 dbg("mcs7840_break mos7840_port->shadowLCR is %x\n",
1348 mos7840_port
->shadowLCR
);
1349 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
,
1350 mos7840_port
->shadowLCR
);
1355 /*****************************************************************************
1356 * mos7840_write_room
1357 * this function is called by the tty driver when it wants to know how many
1358 * bytes of data we can accept for a specific port.
1359 * If successful, we return the amount of room that we have for this port
1360 * Otherwise we return a negative error number.
1361 *****************************************************************************/
1363 static int mos7840_write_room(struct tty_struct
*tty
)
1365 struct usb_serial_port
*port
= tty
->driver_data
;
1368 unsigned long flags
;
1369 struct moschip_port
*mos7840_port
;
1371 dbg("%s \n", " mos7840_write_room:entering ...........");
1373 if (mos7840_port_paranoia_check(port
, __func__
)) {
1374 dbg("%s", "Invalid port \n");
1375 dbg("%s \n", " mos7840_write_room:leaving ...........");
1379 mos7840_port
= mos7840_get_port_private(port
);
1380 if (mos7840_port
== NULL
) {
1381 dbg("%s \n", "mos7840_break:leaving ...........");
1385 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1386 for (i
= 0; i
< NUM_URBS
; ++i
) {
1387 if (!mos7840_port
->busy
[i
])
1388 room
+= URB_TRANSFER_BUFFER_SIZE
;
1390 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1392 room
= (room
== 0) ? 0 : room
- URB_TRANSFER_BUFFER_SIZE
+ 1;
1393 dbg("%s - returns %d", __func__
, room
);
1398 /*****************************************************************************
1400 * this function is called by the tty driver when data should be written to
1402 * If successful, we return the number of bytes written, otherwise we
1403 * return a negative error number.
1404 *****************************************************************************/
1406 static int mos7840_write(struct tty_struct
*tty
, struct usb_serial_port
*port
,
1407 const unsigned char *data
, int count
)
1413 unsigned long flags
;
1415 struct moschip_port
*mos7840_port
;
1416 struct usb_serial
*serial
;
1419 const unsigned char *current_position
= data
;
1420 unsigned char *data1
;
1421 dbg("%s \n", "entering ...........");
1422 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1423 mos7840_port->shadowLCR); */
1427 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
1428 mos7840_port
->shadowLCR
= Data
;
1429 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data
);
1430 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1431 mos7840_port
->shadowLCR
);
1434 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1435 /* mos7840_port->shadowLCR=Data;//Need to add later */
1437 Data
|= SERIAL_LCR_DLAB
; /* data latch enable in LCR 0x80 */
1438 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1441 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1443 status
= mos7840_get_uart_reg(port
, DIVISOR_LATCH_LSB
, &Data
);
1444 dbg("mos7840_write:DLL value is %x\n", Data
);
1447 status
= mos7840_get_uart_reg(port
, DIVISOR_LATCH_MSB
, &Data
);
1448 dbg("mos7840_write:DLM value is %x\n", Data
);
1450 Data
= Data
& ~SERIAL_LCR_DLAB
;
1451 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1452 mos7840_port
->shadowLCR
);
1453 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1456 if (mos7840_port_paranoia_check(port
, __func__
)) {
1457 dbg("%s", "Port Paranoia failed \n");
1461 serial
= port
->serial
;
1462 if (mos7840_serial_paranoia_check(serial
, __func__
)) {
1463 dbg("%s", "Serial Paranoia failed \n");
1467 mos7840_port
= mos7840_get_port_private(port
);
1468 if (mos7840_port
== NULL
) {
1469 dbg("%s", "mos7840_port is NULL\n");
1473 /* try to find a free urb in the list */
1476 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1477 for (i
= 0; i
< NUM_URBS
; ++i
) {
1478 if (!mos7840_port
->busy
[i
]) {
1479 mos7840_port
->busy
[i
] = 1;
1480 urb
= mos7840_port
->write_urb_pool
[i
];
1485 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1488 dbg("%s - no more free urbs", __func__
);
1492 if (urb
->transfer_buffer
== NULL
) {
1493 urb
->transfer_buffer
=
1494 kmalloc(URB_TRANSFER_BUFFER_SIZE
, GFP_KERNEL
);
1496 if (urb
->transfer_buffer
== NULL
) {
1497 dev_err(&port
->dev
, "%s no more kernel memory...\n",
1502 transfer_size
= min(count
, URB_TRANSFER_BUFFER_SIZE
);
1504 memcpy(urb
->transfer_buffer
, current_position
, transfer_size
);
1506 /* fill urb with data and submit */
1507 usb_fill_bulk_urb(urb
,
1509 usb_sndbulkpipe(serial
->dev
,
1510 port
->bulk_out_endpointAddress
),
1511 urb
->transfer_buffer
,
1513 mos7840_bulk_out_data_callback
, mos7840_port
);
1515 data1
= urb
->transfer_buffer
;
1516 dbg("\nbulkout endpoint is %d", port
->bulk_out_endpointAddress
);
1518 /* send it down the pipe */
1519 status
= usb_submit_urb(urb
, GFP_ATOMIC
);
1522 mos7840_port
->busy
[i
] = 0;
1523 dev_err(&port
->dev
, "%s - usb_submit_urb(write bulk) failed "
1524 "with status = %d\n", __func__
, status
);
1525 bytes_sent
= status
;
1528 bytes_sent
= transfer_size
;
1529 mos7840_port
->icount
.tx
+= transfer_size
;
1531 dbg("mos7840_port->icount.tx is %d:\n", mos7840_port
->icount
.tx
);
1537 /*****************************************************************************
1539 * this function is called by the tty driver when it wants to stop the data
1540 * being read from the port.
1541 *****************************************************************************/
1543 static void mos7840_throttle(struct tty_struct
*tty
)
1545 struct usb_serial_port
*port
= tty
->driver_data
;
1546 struct moschip_port
*mos7840_port
;
1549 if (mos7840_port_paranoia_check(port
, __func__
)) {
1550 dbg("%s", "Invalid port \n");
1554 dbg("- port %d\n", port
->number
);
1556 mos7840_port
= mos7840_get_port_private(port
);
1558 if (mos7840_port
== NULL
)
1561 if (!mos7840_port
->open
) {
1562 dbg("%s\n", "port not opened");
1566 dbg("%s", "Entering .......... \n");
1568 /* if we are implementing XON/XOFF, send the stop character */
1570 unsigned char stop_char
= STOP_CHAR(tty
);
1571 status
= mos7840_write(tty
, port
, &stop_char
, 1);
1575 /* if we are implementing RTS/CTS, toggle that line */
1576 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1577 mos7840_port
->shadowMCR
&= ~MCR_RTS
;
1578 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1579 mos7840_port
->shadowMCR
);
1587 /*****************************************************************************
1588 * mos7840_unthrottle
1589 * this function is called by the tty driver when it wants to resume
1590 * the data being read from the port (called after mos7840_throttle is
1592 *****************************************************************************/
1593 static void mos7840_unthrottle(struct tty_struct
*tty
)
1595 struct usb_serial_port
*port
= tty
->driver_data
;
1597 struct moschip_port
*mos7840_port
= mos7840_get_port_private(port
);
1599 if (mos7840_port_paranoia_check(port
, __func__
)) {
1600 dbg("%s", "Invalid port \n");
1604 if (mos7840_port
== NULL
)
1607 if (!mos7840_port
->open
) {
1608 dbg("%s - port not opened", __func__
);
1612 dbg("%s", "Entering .......... \n");
1614 /* if we are implementing XON/XOFF, send the start character */
1616 unsigned char start_char
= START_CHAR(tty
);
1617 status
= mos7840_write(tty
, port
, &start_char
, 1);
1622 /* if we are implementing RTS/CTS, toggle that line */
1623 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1624 mos7840_port
->shadowMCR
|= MCR_RTS
;
1625 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1626 mos7840_port
->shadowMCR
);
1632 static int mos7840_tiocmget(struct tty_struct
*tty
, struct file
*file
)
1634 struct usb_serial_port
*port
= tty
->driver_data
;
1635 struct moschip_port
*mos7840_port
;
1636 unsigned int result
;
1640 mos7840_port
= mos7840_get_port_private(port
);
1642 dbg("%s - port %d", __func__
, port
->number
);
1644 if (mos7840_port
== NULL
)
1647 status
= mos7840_get_uart_reg(port
, MODEM_STATUS_REGISTER
, &msr
);
1648 status
= mos7840_get_uart_reg(port
, MODEM_CONTROL_REGISTER
, &mcr
);
1649 result
= ((mcr
& MCR_DTR
) ? TIOCM_DTR
: 0)
1650 | ((mcr
& MCR_RTS
) ? TIOCM_RTS
: 0)
1651 | ((mcr
& MCR_LOOPBACK
) ? TIOCM_LOOP
: 0)
1652 | ((msr
& MOS7840_MSR_CTS
) ? TIOCM_CTS
: 0)
1653 | ((msr
& MOS7840_MSR_CD
) ? TIOCM_CAR
: 0)
1654 | ((msr
& MOS7840_MSR_RI
) ? TIOCM_RI
: 0)
1655 | ((msr
& MOS7840_MSR_DSR
) ? TIOCM_DSR
: 0);
1657 dbg("%s - 0x%04X", __func__
, result
);
1662 static int mos7840_tiocmset(struct tty_struct
*tty
, struct file
*file
,
1663 unsigned int set
, unsigned int clear
)
1665 struct usb_serial_port
*port
= tty
->driver_data
;
1666 struct moschip_port
*mos7840_port
;
1670 dbg("%s - port %d", __func__
, port
->number
);
1672 mos7840_port
= mos7840_get_port_private(port
);
1674 if (mos7840_port
== NULL
)
1677 /* FIXME: What locks the port registers ? */
1678 mcr
= mos7840_port
->shadowMCR
;
1679 if (clear
& TIOCM_RTS
)
1681 if (clear
& TIOCM_DTR
)
1683 if (clear
& TIOCM_LOOP
)
1684 mcr
&= ~MCR_LOOPBACK
;
1686 if (set
& TIOCM_RTS
)
1688 if (set
& TIOCM_DTR
)
1690 if (set
& TIOCM_LOOP
)
1691 mcr
|= MCR_LOOPBACK
;
1693 mos7840_port
->shadowMCR
= mcr
;
1695 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, mcr
);
1697 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
1704 /*****************************************************************************
1705 * mos7840_calc_baud_rate_divisor
1706 * this function calculates the proper baud rate divisor for the specified
1708 *****************************************************************************/
1709 static int mos7840_calc_baud_rate_divisor(int baudRate
, int *divisor
,
1713 dbg("%s - %d", __func__
, baudRate
);
1715 if (baudRate
<= 115200) {
1716 *divisor
= 115200 / baudRate
;
1719 if ((baudRate
> 115200) && (baudRate
<= 230400)) {
1720 *divisor
= 230400 / baudRate
;
1721 *clk_sel_val
= 0x10;
1722 } else if ((baudRate
> 230400) && (baudRate
<= 403200)) {
1723 *divisor
= 403200 / baudRate
;
1724 *clk_sel_val
= 0x20;
1725 } else if ((baudRate
> 403200) && (baudRate
<= 460800)) {
1726 *divisor
= 460800 / baudRate
;
1727 *clk_sel_val
= 0x30;
1728 } else if ((baudRate
> 460800) && (baudRate
<= 806400)) {
1729 *divisor
= 806400 / baudRate
;
1730 *clk_sel_val
= 0x40;
1731 } else if ((baudRate
> 806400) && (baudRate
<= 921600)) {
1732 *divisor
= 921600 / baudRate
;
1733 *clk_sel_val
= 0x50;
1734 } else if ((baudRate
> 921600) && (baudRate
<= 1572864)) {
1735 *divisor
= 1572864 / baudRate
;
1736 *clk_sel_val
= 0x60;
1737 } else if ((baudRate
> 1572864) && (baudRate
<= 3145728)) {
1738 *divisor
= 3145728 / baudRate
;
1739 *clk_sel_val
= 0x70;
1745 for (i
= 0; i
< ARRAY_SIZE(mos7840_divisor_table
); i
++) {
1746 if (mos7840_divisor_table
[i
].BaudRate
== baudrate
) {
1747 *divisor
= mos7840_divisor_table
[i
].Divisor
;
1752 /* After trying for all the standard baud rates *
1753 * Try calculating the divisor for this baud rate */
1755 if (baudrate
> 75 && baudrate
< 230400) {
1756 /* get the divisor */
1757 custom
= (__u16
) (230400L / baudrate
);
1759 /* Check for round off */
1760 round1
= (__u16
) (2304000L / baudrate
);
1761 round
= (__u16
) (round1
- (custom
* 10));
1766 dbg(" Baud %d = %d\n", baudrate
, custom
);
1770 dbg("%s\n", " Baud calculation Failed...");
1775 /*****************************************************************************
1776 * mos7840_send_cmd_write_baud_rate
1777 * this function sends the proper command to change the baud rate of the
1779 *****************************************************************************/
1781 static int mos7840_send_cmd_write_baud_rate(struct moschip_port
*mos7840_port
,
1787 unsigned char number
;
1789 struct usb_serial_port
*port
;
1791 if (mos7840_port
== NULL
)
1794 port
= (struct usb_serial_port
*)mos7840_port
->port
;
1795 if (mos7840_port_paranoia_check(port
, __func__
)) {
1796 dbg("%s", "Invalid port \n");
1800 if (mos7840_serial_paranoia_check(port
->serial
, __func__
)) {
1801 dbg("%s", "Invalid Serial \n");
1805 dbg("%s", "Entering .......... \n");
1807 number
= mos7840_port
->port
->number
- mos7840_port
->port
->serial
->minor
;
1809 dbg("%s - port = %d, baud = %d", __func__
,
1810 mos7840_port
->port
->number
, baudRate
);
1811 /* reset clk_uart_sel in spregOffset */
1812 if (baudRate
> 115200) {
1813 #ifdef HW_flow_control
1814 /* NOTE: need to see the pther register to modify */
1815 /* setting h/w flow control bit to 1 */
1817 mos7840_port
->shadowMCR
= Data
;
1818 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1821 dbg("Writing spreg failed in set_serial_baud\n");
1827 #ifdef HW_flow_control
1828 / *setting h
/w flow control bit to
0 */
1830 mos7840_port
->shadowMCR
= Data
;
1831 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1834 dbg("Writing spreg failed in set_serial_baud\n");
1841 if (1) { /* baudRate <= 115200) */
1844 status
= mos7840_calc_baud_rate_divisor(baudRate
, &divisor
,
1846 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
,
1849 dbg("reading spreg failed in set_serial_baud\n");
1852 Data
= (Data
& 0x8f) | clk_sel_val
;
1853 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
,
1856 dbg("Writing spreg failed in set_serial_baud\n");
1859 /* Calculate the Divisor */
1862 dev_err(&port
->dev
, "%s - bad baud rate\n", __func__
);
1865 /* Enable access to divisor latch */
1866 Data
= mos7840_port
->shadowLCR
| SERIAL_LCR_DLAB
;
1867 mos7840_port
->shadowLCR
= Data
;
1868 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1870 /* Write the divisor */
1871 Data
= (unsigned char)(divisor
& 0xff);
1872 dbg("set_serial_baud Value to write DLL is %x\n", Data
);
1873 mos7840_set_uart_reg(port
, DIVISOR_LATCH_LSB
, Data
);
1875 Data
= (unsigned char)((divisor
& 0xff00) >> 8);
1876 dbg("set_serial_baud Value to write DLM is %x\n", Data
);
1877 mos7840_set_uart_reg(port
, DIVISOR_LATCH_MSB
, Data
);
1879 /* Disable access to divisor latch */
1880 Data
= mos7840_port
->shadowLCR
& ~SERIAL_LCR_DLAB
;
1881 mos7840_port
->shadowLCR
= Data
;
1882 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1888 /*****************************************************************************
1889 * mos7840_change_port_settings
1890 * This routine is called to set the UART on the device to match
1891 * the specified new settings.
1892 *****************************************************************************/
1894 static void mos7840_change_port_settings(struct tty_struct
*tty
,
1895 struct moschip_port
*mos7840_port
, struct ktermios
*old_termios
)
1905 struct usb_serial_port
*port
;
1906 struct usb_serial
*serial
;
1908 if (mos7840_port
== NULL
)
1911 port
= (struct usb_serial_port
*)mos7840_port
->port
;
1913 if (mos7840_port_paranoia_check(port
, __func__
)) {
1914 dbg("%s", "Invalid port \n");
1918 if (mos7840_serial_paranoia_check(port
->serial
, __func__
)) {
1919 dbg("%s", "Invalid Serial \n");
1923 serial
= port
->serial
;
1925 dbg("%s - port %d", __func__
, mos7840_port
->port
->number
);
1927 if (!mos7840_port
->open
) {
1928 dbg("%s - port not opened", __func__
);
1932 dbg("%s", "Entering .......... \n");
1936 lParity
= LCR_PAR_NONE
;
1938 cflag
= tty
->termios
->c_cflag
;
1939 iflag
= tty
->termios
->c_iflag
;
1941 /* Change the number of bits */
1942 if (cflag
& CSIZE
) {
1943 switch (cflag
& CSIZE
) {
1961 /* Change the Parity bit */
1962 if (cflag
& PARENB
) {
1963 if (cflag
& PARODD
) {
1964 lParity
= LCR_PAR_ODD
;
1965 dbg("%s - parity = odd", __func__
);
1967 lParity
= LCR_PAR_EVEN
;
1968 dbg("%s - parity = even", __func__
);
1972 dbg("%s - parity = none", __func__
);
1976 lParity
= lParity
| 0x20;
1978 /* Change the Stop bit */
1979 if (cflag
& CSTOPB
) {
1981 dbg("%s - stop bits = 2", __func__
);
1984 dbg("%s - stop bits = 1", __func__
);
1987 /* Update the LCR with the correct value */
1988 mos7840_port
->shadowLCR
&=
1989 ~(LCR_BITS_MASK
| LCR_STOP_MASK
| LCR_PAR_MASK
);
1990 mos7840_port
->shadowLCR
|= (lData
| lParity
| lStop
);
1992 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x\n",
1993 mos7840_port
->shadowLCR
);
1994 /* Disable Interrupts */
1996 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
1999 mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
2002 mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
2004 /* Send the updated LCR value to the mos7840 */
2005 Data
= mos7840_port
->shadowLCR
;
2007 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
2010 mos7840_port
->shadowMCR
= Data
;
2011 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2013 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2015 /* set up the MCR register and send it to the mos7840 */
2017 mos7840_port
->shadowMCR
= MCR_MASTER_IE
;
2019 mos7840_port
->shadowMCR
|= (MCR_DTR
| MCR_RTS
);
2021 if (cflag
& CRTSCTS
)
2022 mos7840_port
->shadowMCR
|= (MCR_XON_ANY
);
2024 mos7840_port
->shadowMCR
&= ~(MCR_XON_ANY
);
2026 Data
= mos7840_port
->shadowMCR
;
2027 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2029 /* Determine divisor based on baud rate */
2030 baud
= tty_get_baud_rate(tty
);
2033 /* pick a default, any default... */
2034 dbg("%s\n", "Picked default baud...");
2038 dbg("%s - baud rate = %d", __func__
, baud
);
2039 status
= mos7840_send_cmd_write_baud_rate(mos7840_port
, baud
);
2041 /* Enable Interrupts */
2043 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
2045 if (mos7840_port
->read_urb
->status
!= -EINPROGRESS
) {
2046 mos7840_port
->read_urb
->dev
= serial
->dev
;
2048 status
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
2051 dbg(" usb_submit_urb(read bulk) failed, status = %d",
2055 wake_up(&mos7840_port
->delta_msr_wait
);
2056 mos7840_port
->delta_msr_cond
= 1;
2057 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x\n",
2058 mos7840_port
->shadowLCR
);
2063 /*****************************************************************************
2064 * mos7840_set_termios
2065 * this function is called by the tty driver when it wants to change
2066 * the termios structure
2067 *****************************************************************************/
2069 static void mos7840_set_termios(struct tty_struct
*tty
,
2070 struct usb_serial_port
*port
,
2071 struct ktermios
*old_termios
)
2075 struct usb_serial
*serial
;
2076 struct moschip_port
*mos7840_port
;
2077 dbg("mos7840_set_termios: START\n");
2078 if (mos7840_port_paranoia_check(port
, __func__
)) {
2079 dbg("%s", "Invalid port \n");
2083 serial
= port
->serial
;
2085 if (mos7840_serial_paranoia_check(serial
, __func__
)) {
2086 dbg("%s", "Invalid Serial \n");
2090 mos7840_port
= mos7840_get_port_private(port
);
2092 if (mos7840_port
== NULL
)
2095 if (!mos7840_port
->open
) {
2096 dbg("%s - port not opened", __func__
);
2100 dbg("%s\n", "setting termios - ");
2102 cflag
= tty
->termios
->c_cflag
;
2104 dbg("%s - clfag %08x iflag %08x", __func__
,
2105 tty
->termios
->c_cflag
, RELEVANT_IFLAG(tty
->termios
->c_iflag
));
2106 dbg("%s - old clfag %08x old iflag %08x", __func__
,
2107 old_termios
->c_cflag
, RELEVANT_IFLAG(old_termios
->c_iflag
));
2108 dbg("%s - port %d", __func__
, port
->number
);
2110 /* change the port settings to the new ones specified */
2112 mos7840_change_port_settings(tty
, mos7840_port
, old_termios
);
2114 if (!mos7840_port
->read_urb
) {
2115 dbg("%s", "URB KILLED !!!!!\n");
2119 if (mos7840_port
->read_urb
->status
!= -EINPROGRESS
) {
2120 mos7840_port
->read_urb
->dev
= serial
->dev
;
2121 status
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
2123 dbg(" usb_submit_urb(read bulk) failed, status = %d",
2130 /*****************************************************************************
2131 * mos7840_get_lsr_info - get line status register info
2133 * Purpose: Let user call ioctl() to get info when the UART physically
2134 * is emptied. On bus types like RS485, the transmitter must
2135 * release the bus after transmitting. This must be done when
2136 * the transmit shift register is empty, not be done when the
2137 * transmit holding register is empty. This functionality
2138 * allows an RS485 driver to be written in user space.
2139 *****************************************************************************/
2141 static int mos7840_get_lsr_info(struct tty_struct
*tty
,
2142 unsigned int __user
*value
)
2145 unsigned int result
= 0;
2147 count
= mos7840_chars_in_buffer(tty
);
2149 dbg("%s -- Empty", __func__
);
2150 result
= TIOCSER_TEMT
;
2153 if (copy_to_user(value
, &result
, sizeof(int)))
2158 /*****************************************************************************
2159 * mos7840_set_modem_info
2160 * function to set modem info
2161 *****************************************************************************/
2163 /* FIXME: Should be using the model control hooks */
2165 static int mos7840_set_modem_info(struct moschip_port
*mos7840_port
,
2166 unsigned int cmd
, unsigned int __user
*value
)
2172 struct usb_serial_port
*port
;
2174 if (mos7840_port
== NULL
)
2177 port
= (struct usb_serial_port
*)mos7840_port
->port
;
2178 if (mos7840_port_paranoia_check(port
, __func__
)) {
2179 dbg("%s", "Invalid port \n");
2183 mcr
= mos7840_port
->shadowMCR
;
2185 if (copy_from_user(&arg
, value
, sizeof(int)))
2190 if (arg
& TIOCM_RTS
)
2192 if (arg
& TIOCM_DTR
)
2194 if (arg
& TIOCM_LOOP
)
2195 mcr
|= MCR_LOOPBACK
;
2199 if (arg
& TIOCM_RTS
)
2201 if (arg
& TIOCM_DTR
)
2203 if (arg
& TIOCM_LOOP
)
2204 mcr
&= ~MCR_LOOPBACK
;
2208 /* turn off the RTS and DTR and LOOPBACK
2209 * and then only turn on what was asked to */
2210 mcr
&= ~(MCR_RTS
| MCR_DTR
| MCR_LOOPBACK
);
2211 mcr
|= ((arg
& TIOCM_RTS
) ? MCR_RTS
: 0);
2212 mcr
|= ((arg
& TIOCM_DTR
) ? MCR_DTR
: 0);
2213 mcr
|= ((arg
& TIOCM_LOOP
) ? MCR_LOOPBACK
: 0);
2217 mos7840_port
->shadowMCR
= mcr
;
2219 Data
= mos7840_port
->shadowMCR
;
2220 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2222 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
2229 /*****************************************************************************
2230 * mos7840_get_modem_info
2231 * function to get modem info
2232 *****************************************************************************/
2234 static int mos7840_get_modem_info(struct moschip_port
*mos7840_port
,
2235 unsigned int __user
*value
)
2237 unsigned int result
= 0;
2239 unsigned int mcr
= mos7840_port
->shadowMCR
;
2240 mos7840_get_uart_reg(mos7840_port
->port
,
2241 MODEM_STATUS_REGISTER
, &msr
);
2242 result
= ((mcr
& MCR_DTR
) ? TIOCM_DTR
: 0) /* 0x002 */
2243 |((mcr
& MCR_RTS
) ? TIOCM_RTS
: 0) /* 0x004 */
2244 |((msr
& MOS7840_MSR_CTS
) ? TIOCM_CTS
: 0) /* 0x020 */
2245 |((msr
& MOS7840_MSR_CD
) ? TIOCM_CAR
: 0) /* 0x040 */
2246 |((msr
& MOS7840_MSR_RI
) ? TIOCM_RI
: 0) /* 0x080 */
2247 |((msr
& MOS7840_MSR_DSR
) ? TIOCM_DSR
: 0); /* 0x100 */
2249 dbg("%s -- %x", __func__
, result
);
2251 if (copy_to_user(value
, &result
, sizeof(int)))
2256 /*****************************************************************************
2257 * mos7840_get_serial_info
2258 * function to get information about serial port
2259 *****************************************************************************/
2261 static int mos7840_get_serial_info(struct moschip_port
*mos7840_port
,
2262 struct serial_struct __user
*retinfo
)
2264 struct serial_struct tmp
;
2266 if (mos7840_port
== NULL
)
2272 memset(&tmp
, 0, sizeof(tmp
));
2274 tmp
.type
= PORT_16550A
;
2275 tmp
.line
= mos7840_port
->port
->serial
->minor
;
2276 tmp
.port
= mos7840_port
->port
->number
;
2278 tmp
.flags
= ASYNC_SKIP_TEST
| ASYNC_AUTO_IRQ
;
2279 tmp
.xmit_fifo_size
= NUM_URBS
* URB_TRANSFER_BUFFER_SIZE
;
2280 tmp
.baud_base
= 9600;
2281 tmp
.close_delay
= 5 * HZ
;
2282 tmp
.closing_wait
= 30 * HZ
;
2284 if (copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)))
2289 /*****************************************************************************
2291 * this function handles any ioctl calls to the driver
2292 *****************************************************************************/
2294 static int mos7840_ioctl(struct tty_struct
*tty
, struct file
*file
,
2295 unsigned int cmd
, unsigned long arg
)
2297 struct usb_serial_port
*port
= tty
->driver_data
;
2298 void __user
*argp
= (void __user
*)arg
;
2299 struct moschip_port
*mos7840_port
;
2301 struct async_icount cnow
;
2302 struct async_icount cprev
;
2303 struct serial_icounter_struct icount
;
2306 if (mos7840_port_paranoia_check(port
, __func__
)) {
2307 dbg("%s", "Invalid port \n");
2311 mos7840_port
= mos7840_get_port_private(port
);
2313 if (mos7840_port
== NULL
)
2316 dbg("%s - port %d, cmd = 0x%x", __func__
, port
->number
, cmd
);
2319 /* return number of bytes available */
2322 dbg("%s (%d) TIOCSERGETLSR", __func__
, port
->number
);
2323 return mos7840_get_lsr_info(tty
, argp
);
2326 /* FIXME: use the modem hooks and remove this */
2330 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __func__
,
2333 mos7840_set_modem_info(mos7840_port
, cmd
, argp
);
2337 dbg("%s (%d) TIOCMGET", __func__
, port
->number
);
2338 return mos7840_get_modem_info(mos7840_port
, argp
);
2341 dbg("%s (%d) TIOCGSERIAL", __func__
, port
->number
);
2342 return mos7840_get_serial_info(mos7840_port
, argp
);
2345 dbg("%s (%d) TIOCSSERIAL", __func__
, port
->number
);
2349 dbg("%s (%d) TIOCMIWAIT", __func__
, port
->number
);
2350 cprev
= mos7840_port
->icount
;
2352 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2353 mos7840_port
->delta_msr_cond
= 0;
2354 wait_event_interruptible(mos7840_port
->delta_msr_wait
,
2356 delta_msr_cond
== 1));
2358 /* see if a signal did it */
2359 if (signal_pending(current
))
2360 return -ERESTARTSYS
;
2361 cnow
= mos7840_port
->icount
;
2363 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
2364 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
)
2365 return -EIO
; /* no change => error */
2366 if (((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
.rng
)) ||
2367 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
.dsr
)) ||
2368 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
.dcd
)) ||
2369 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
.cts
))) {
2378 cnow
= mos7840_port
->icount
;
2380 icount
.cts
= cnow
.cts
;
2381 icount
.dsr
= cnow
.dsr
;
2382 icount
.rng
= cnow
.rng
;
2383 icount
.dcd
= cnow
.dcd
;
2384 icount
.rx
= cnow
.rx
;
2385 icount
.tx
= cnow
.tx
;
2386 icount
.frame
= cnow
.frame
;
2387 icount
.overrun
= cnow
.overrun
;
2388 icount
.parity
= cnow
.parity
;
2389 icount
.brk
= cnow
.brk
;
2390 icount
.buf_overrun
= cnow
.buf_overrun
;
2392 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__
,
2393 port
->number
, icount
.rx
, icount
.tx
);
2394 if (copy_to_user(argp
, &icount
, sizeof(icount
)))
2400 return -ENOIOCTLCMD
;
2403 static int mos7840_calc_num_ports(struct usb_serial
*serial
)
2405 int mos7840_num_ports
= 0;
2407 dbg("numberofendpoints: %d \n",
2408 (int)serial
->interface
->cur_altsetting
->desc
.bNumEndpoints
);
2409 dbg("numberofendpoints: %d \n",
2410 (int)serial
->interface
->altsetting
->desc
.bNumEndpoints
);
2411 if (serial
->interface
->cur_altsetting
->desc
.bNumEndpoints
== 5) {
2412 mos7840_num_ports
= serial
->num_ports
= 2;
2413 } else if (serial
->interface
->cur_altsetting
->desc
.bNumEndpoints
== 9) {
2414 serial
->num_bulk_in
= 4;
2415 serial
->num_bulk_out
= 4;
2416 mos7840_num_ports
= serial
->num_ports
= 4;
2419 return mos7840_num_ports
;
2422 /****************************************************************************
2424 ****************************************************************************/
2426 static int mos7840_startup(struct usb_serial
*serial
)
2428 struct moschip_port
*mos7840_port
;
2429 struct usb_device
*dev
;
2433 dbg("%s \n", " mos7840_startup :entering..........");
2436 dbg("%s\n", "Invalid Handler");
2442 dbg("%s\n", "Entering...");
2444 /* we set up the pointers to the endpoints in the mos7840_open *
2445 * function, as the structures aren't created yet. */
2447 /* set up port private structures */
2448 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2449 mos7840_port
= kzalloc(sizeof(struct moschip_port
), GFP_KERNEL
);
2450 if (mos7840_port
== NULL
) {
2451 dev_err(&dev
->dev
, "%s - Out of memory\n", __func__
);
2453 i
--; /* don't follow NULL pointer cleaning up */
2457 /* Initialize all port interrupt end point to port 0 int
2458 * endpoint. Our device has only one interrupt end point
2459 * common to all port */
2461 mos7840_port
->port
= serial
->port
[i
];
2462 mos7840_set_port_private(serial
->port
[i
], mos7840_port
);
2463 spin_lock_init(&mos7840_port
->pool_lock
);
2465 mos7840_port
->port_num
= ((serial
->port
[i
]->number
-
2466 (serial
->port
[i
]->serial
->minor
)) +
2469 if (mos7840_port
->port_num
== 1) {
2470 mos7840_port
->SpRegOffset
= 0x0;
2471 mos7840_port
->ControlRegOffset
= 0x1;
2472 mos7840_port
->DcrRegOffset
= 0x4;
2473 } else if ((mos7840_port
->port_num
== 2)
2474 && (serial
->num_ports
== 4)) {
2475 mos7840_port
->SpRegOffset
= 0x8;
2476 mos7840_port
->ControlRegOffset
= 0x9;
2477 mos7840_port
->DcrRegOffset
= 0x16;
2478 } else if ((mos7840_port
->port_num
== 2)
2479 && (serial
->num_ports
== 2)) {
2480 mos7840_port
->SpRegOffset
= 0xa;
2481 mos7840_port
->ControlRegOffset
= 0xb;
2482 mos7840_port
->DcrRegOffset
= 0x19;
2483 } else if ((mos7840_port
->port_num
== 3)
2484 && (serial
->num_ports
== 4)) {
2485 mos7840_port
->SpRegOffset
= 0xa;
2486 mos7840_port
->ControlRegOffset
= 0xb;
2487 mos7840_port
->DcrRegOffset
= 0x19;
2488 } else if ((mos7840_port
->port_num
== 4)
2489 && (serial
->num_ports
== 4)) {
2490 mos7840_port
->SpRegOffset
= 0xc;
2491 mos7840_port
->ControlRegOffset
= 0xd;
2492 mos7840_port
->DcrRegOffset
= 0x1c;
2494 mos7840_dump_serial_port(mos7840_port
);
2495 mos7840_set_port_private(serial
->port
[i
], mos7840_port
);
2497 /* enable rx_disable bit in control register */
2498 status
= mos7840_get_reg_sync(serial
->port
[i
],
2499 mos7840_port
->ControlRegOffset
, &Data
);
2501 dbg("Reading ControlReg failed status-0x%x\n", status
);
2504 dbg("ControlReg Reading success val is %x, status%d\n",
2506 Data
|= 0x08; /* setting driver done bit */
2507 Data
|= 0x04; /* sp1_bit to have cts change reflect in
2510 /* Data |= 0x20; //rx_disable bit */
2511 status
= mos7840_set_reg_sync(serial
->port
[i
],
2512 mos7840_port
->ControlRegOffset
, Data
);
2514 dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status
);
2517 dbg("ControlReg Writing success(rx_disable) status%d\n",
2520 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2523 status
= mos7840_set_reg_sync(serial
->port
[i
],
2524 (__u16
) (mos7840_port
->DcrRegOffset
+ 0), Data
);
2526 dbg("Writing DCR0 failed status-0x%x\n", status
);
2529 dbg("DCR0 Writing success status%d\n", status
);
2532 status
= mos7840_set_reg_sync(serial
->port
[i
],
2533 (__u16
) (mos7840_port
->DcrRegOffset
+ 1), Data
);
2535 dbg("Writing DCR1 failed status-0x%x\n", status
);
2538 dbg("DCR1 Writing success status%d\n", status
);
2541 status
= mos7840_set_reg_sync(serial
->port
[i
],
2542 (__u16
) (mos7840_port
->DcrRegOffset
+ 2), Data
);
2544 dbg("Writing DCR2 failed status-0x%x\n", status
);
2547 dbg("DCR2 Writing success status%d\n", status
);
2549 /* write values in clkstart0x0 and clkmulti 0x20 */
2551 status
= mos7840_set_reg_sync(serial
->port
[i
],
2552 CLK_START_VALUE_REGISTER
, Data
);
2554 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status
);
2557 dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status
);
2560 status
= mos7840_set_reg_sync(serial
->port
[i
],
2561 CLK_MULTI_REGISTER
, Data
);
2563 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n",
2567 dbg("CLK_MULTI_REGISTER Writing success status%d\n",
2570 /* write value 0x0 to scratchpad register */
2572 status
= mos7840_set_uart_reg(serial
->port
[i
],
2573 SCRATCH_PAD_REGISTER
, Data
);
2575 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n",
2579 dbg("SCRATCH_PAD_REGISTER Writing success status%d\n",
2582 /* Zero Length flag register */
2583 if ((mos7840_port
->port_num
!= 1)
2584 && (serial
->num_ports
== 2)) {
2587 status
= mos7840_set_reg_sync(serial
->port
[i
],
2589 ((__u16
)mos7840_port
->port_num
)), Data
);
2590 dbg("ZLIP offset%x\n",
2592 ((__u16
) mos7840_port
->port_num
)));
2594 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2598 dbg("ZLP_REG%d Writing success status%d\n",
2602 status
= mos7840_set_reg_sync(serial
->port
[i
],
2604 ((__u16
)mos7840_port
->port_num
) - 0x1), Data
);
2605 dbg("ZLIP offset%x\n",
2607 ((__u16
) mos7840_port
->port_num
) - 0x1));
2609 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2613 dbg("ZLP_REG%d Writing success status%d\n",
2617 mos7840_port
->control_urb
= usb_alloc_urb(0, GFP_KERNEL
);
2618 mos7840_port
->ctrl_buf
= kmalloc(16, GFP_KERNEL
);
2619 mos7840_port
->dr
= kmalloc(sizeof(struct usb_ctrlrequest
),
2621 if (!mos7840_port
->control_urb
|| !mos7840_port
->ctrl_buf
||
2622 !mos7840_port
->dr
) {
2628 /* Zero Length flag enable */
2630 status
= mos7840_set_reg_sync(serial
->port
[0], ZLP_REG5
, Data
);
2632 dbg("Writing ZLP_REG5 failed status-0x%x\n", status
);
2635 dbg("ZLP_REG5 Writing success status%d\n", status
);
2637 /* setting configuration feature to one */
2638 usb_control_msg(serial
->dev
, usb_sndctrlpipe(serial
->dev
, 0),
2639 (__u8
) 0x03, 0x00, 0x01, 0x00, NULL
, 0x00, 5 * HZ
);
2642 for (/* nothing */; i
>= 0; i
--) {
2643 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
2645 kfree(mos7840_port
->dr
);
2646 kfree(mos7840_port
->ctrl_buf
);
2647 usb_free_urb(mos7840_port
->control_urb
);
2648 kfree(mos7840_port
);
2649 serial
->port
[i
] = NULL
;
2654 /****************************************************************************
2656 * This function is called whenever the device is removed from the usb bus.
2657 ****************************************************************************/
2659 static void mos7840_shutdown(struct usb_serial
*serial
)
2662 unsigned long flags
;
2663 struct moschip_port
*mos7840_port
;
2664 dbg("%s \n", " shutdown :entering..........");
2667 dbg("%s", "Invalid Handler \n");
2671 /* check for the ports to be closed,close the ports and disconnect */
2673 /* free private structure allocated for serial port *
2674 * stop reads and writes on all ports */
2676 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2677 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
2678 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
2679 mos7840_port
->zombie
= 1;
2680 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
2681 usb_kill_urb(mos7840_port
->control_urb
);
2682 kfree(mos7840_port
->ctrl_buf
);
2683 kfree(mos7840_port
->dr
);
2684 kfree(mos7840_port
);
2685 mos7840_set_port_private(serial
->port
[i
], NULL
);
2688 dbg("%s\n", "Thank u :: ");
2692 static struct usb_driver io_driver
= {
2694 .probe
= usb_serial_probe
,
2695 .disconnect
= usb_serial_disconnect
,
2696 .id_table
= moschip_id_table_combined
,
2700 static struct usb_serial_driver moschip7840_4port_device
= {
2702 .owner
= THIS_MODULE
,
2705 .description
= DRIVER_DESC
,
2706 .usb_driver
= &io_driver
,
2707 .id_table
= moschip_port_id_table
,
2709 .open
= mos7840_open
,
2710 .close
= mos7840_close
,
2711 .write
= mos7840_write
,
2712 .write_room
= mos7840_write_room
,
2713 .chars_in_buffer
= mos7840_chars_in_buffer
,
2714 .throttle
= mos7840_throttle
,
2715 .unthrottle
= mos7840_unthrottle
,
2716 .calc_num_ports
= mos7840_calc_num_ports
,
2717 #ifdef MCSSerialProbe
2718 .probe
= mos7840_serial_probe
,
2720 .ioctl
= mos7840_ioctl
,
2721 .set_termios
= mos7840_set_termios
,
2722 .break_ctl
= mos7840_break
,
2723 .tiocmget
= mos7840_tiocmget
,
2724 .tiocmset
= mos7840_tiocmset
,
2725 .attach
= mos7840_startup
,
2726 .shutdown
= mos7840_shutdown
,
2727 .read_bulk_callback
= mos7840_bulk_in_callback
,
2728 .read_int_callback
= mos7840_interrupt_callback
,
2731 /****************************************************************************
2733 * This is called by the module subsystem, or on startup to initialize us
2734 ****************************************************************************/
2735 static int __init
moschip7840_init(void)
2739 dbg("%s \n", " mos7840_init :entering..........");
2741 /* Register with the usb serial */
2742 retval
= usb_serial_register(&moschip7840_4port_device
);
2745 goto failed_port_device_register
;
2747 dbg("%s\n", "Entring...");
2748 printk(KERN_INFO KBUILD_MODNAME
": " DRIVER_VERSION
":"
2751 /* Register with the usb */
2752 retval
= usb_register(&io_driver
);
2754 dbg("%s\n", "Leaving...");
2757 usb_serial_deregister(&moschip7840_4port_device
);
2758 failed_port_device_register
:
2762 /****************************************************************************
2764 * Called when the driver is about to be unloaded.
2765 ****************************************************************************/
2766 static void __exit
moschip7840_exit(void)
2769 dbg("%s \n", " mos7840_exit :entering..........");
2771 usb_deregister(&io_driver
);
2773 usb_serial_deregister(&moschip7840_4port_device
);
2775 dbg("%s\n", "Entring...");
2778 module_init(moschip7840_init
);
2779 module_exit(moschip7840_exit
);
2781 /* Module information */
2782 MODULE_DESCRIPTION(DRIVER_DESC
);
2783 MODULE_LICENSE("GPL");
2785 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
2786 MODULE_PARM_DESC(debug
, "Debug enabled or not");