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 <asm/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 #define USB_VENDOR_ID_MOSCHIP 0x9710
114 #define MOSCHIP_DEVICE_ID_7840 0x7840
115 #define MOSCHIP_DEVICE_ID_7820 0x7820
117 /* Interrupt Rotinue Defines */
119 #define SERIAL_IIR_RLS 0x06
120 #define SERIAL_IIR_MS 0x00
123 * Emulation of the bit mask on the LINE STATUS REGISTER.
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
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
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))
147 #define CLK_MULTI_REGISTER ((__u16)(0x02))
148 #define CLK_START_VALUE_REGISTER ((__u16)(0x03))
150 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
153 * URB POOL related defines
155 #define NUM_URBS 16 /* URB Count */
156 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
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 */
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 */
171 MODULE_DEVICE_TABLE(usb
, moschip_id_table_combined
);
173 /* This structure holds all of the local port information */
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 */
180 __u8 shadowLCR
; /* last LCR value received */
181 __u8 shadowMCR
; /* last MCR value received */
185 wait_queue_head_t wait_chase
; /* for handling sleeping while waiting for chase to finish */
186 wait_queue_head_t delta_msr_wait
; /* for handling sleeping while waiting for msr change to happen */
188 struct async_icount icount
;
189 struct usb_serial_port
*port
; /* loop back to the owner of this object */
193 __u8 ControlRegOffset
;
195 //for processing control URBS in interrupt context
196 struct urb
*control_urb
;
197 struct usb_ctrlrequest
*dr
;
201 spinlock_t pool_lock
;
202 struct urb
*write_urb_pool
[NUM_URBS
];
210 * mos7840_set_reg_sync
211 * To set the Control register by calling usb_fill_control_urb function
212 * by passing usb_sndctrlpipe function as parameter.
215 static int mos7840_set_reg_sync(struct usb_serial_port
*port
, __u16 reg
,
218 struct usb_device
*dev
= port
->serial
->dev
;
220 dbg("mos7840_set_reg_sync offset is %x, value %x\n", reg
, val
);
222 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), MCS_WRREQ
,
223 MCS_WR_RTYPE
, val
, reg
, NULL
, 0,
228 * mos7840_get_reg_sync
229 * To set the Uart register by calling usb_fill_control_urb function by
230 * passing usb_rcvctrlpipe function as parameter.
233 static int mos7840_get_reg_sync(struct usb_serial_port
*port
, __u16 reg
,
236 struct usb_device
*dev
= port
->serial
->dev
;
239 ret
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0), MCS_RDREQ
,
240 MCS_RD_RTYPE
, 0, reg
, val
, VENDOR_READ_LENGTH
,
242 dbg("mos7840_get_reg_sync offset is %x, return val %x\n", reg
, *val
);
243 *val
= (*val
) & 0x00ff;
248 * mos7840_set_uart_reg
249 * To set the Uart register by calling usb_fill_control_urb function by
250 * passing usb_sndctrlpipe function as parameter.
253 static int mos7840_set_uart_reg(struct usb_serial_port
*port
, __u16 reg
,
257 struct usb_device
*dev
= port
->serial
->dev
;
259 // For the UART control registers, the application number need to be Or'ed
260 if (port
->serial
->num_ports
== 4) {
262 (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) +
264 dbg("mos7840_set_uart_reg application number is %x\n", val
);
266 if (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) == 0) {
268 (((__u16
) port
->number
-
269 (__u16
) (port
->serial
->minor
)) + 1) << 8;
270 dbg("mos7840_set_uart_reg application number is %x\n",
274 (((__u16
) port
->number
-
275 (__u16
) (port
->serial
->minor
)) + 2) << 8;
276 dbg("mos7840_set_uart_reg application number is %x\n",
280 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), MCS_WRREQ
,
281 MCS_WR_RTYPE
, val
, reg
, NULL
, 0,
287 * mos7840_get_uart_reg
288 * To set the Control register by calling usb_fill_control_urb function
289 * by passing usb_rcvctrlpipe function as parameter.
291 static int mos7840_get_uart_reg(struct usb_serial_port
*port
, __u16 reg
,
294 struct usb_device
*dev
= port
->serial
->dev
;
298 //dbg("application number is %4x \n",(((__u16)port->number - (__u16)(port->serial->minor))+1)<<8);
299 /*Wval is same as application number */
300 if (port
->serial
->num_ports
== 4) {
302 (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) +
304 dbg("mos7840_get_uart_reg application number is %x\n", Wval
);
306 if (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) == 0) {
308 (((__u16
) port
->number
-
309 (__u16
) (port
->serial
->minor
)) + 1) << 8;
310 dbg("mos7840_get_uart_reg application number is %x\n",
314 (((__u16
) port
->number
-
315 (__u16
) (port
->serial
->minor
)) + 2) << 8;
316 dbg("mos7840_get_uart_reg application number is %x\n",
320 ret
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0), MCS_RDREQ
,
321 MCS_RD_RTYPE
, Wval
, reg
, val
, VENDOR_READ_LENGTH
,
323 *val
= (*val
) & 0x00ff;
327 static void mos7840_dump_serial_port(struct moschip_port
*mos7840_port
)
330 dbg("***************************************\n");
331 dbg("SpRegOffset is %2x\n", mos7840_port
->SpRegOffset
);
332 dbg("ControlRegOffset is %2x \n", mos7840_port
->ControlRegOffset
);
333 dbg("DCRRegOffset is %2x \n", mos7840_port
->DcrRegOffset
);
334 dbg("***************************************\n");
338 /************************************************************************/
339 /************************************************************************/
340 /* I N T E R F A C E F U N C T I O N S */
341 /* I N T E R F A C E F U N C T I O N S */
342 /************************************************************************/
343 /************************************************************************/
345 static inline void mos7840_set_port_private(struct usb_serial_port
*port
,
346 struct moschip_port
*data
)
348 usb_set_serial_port_data(port
, (void *)data
);
351 static inline struct moschip_port
*mos7840_get_port_private(struct
355 return (struct moschip_port
*)usb_get_serial_port_data(port
);
358 static void mos7840_handle_new_msr(struct moschip_port
*port
, __u8 new_msr
)
360 struct moschip_port
*mos7840_port
;
361 struct async_icount
*icount
;
363 icount
= &mos7840_port
->icount
;
365 (MOS_MSR_DELTA_CTS
| MOS_MSR_DELTA_DSR
| MOS_MSR_DELTA_RI
|
367 icount
= &mos7840_port
->icount
;
369 /* update input line counters */
370 if (new_msr
& MOS_MSR_DELTA_CTS
) {
374 if (new_msr
& MOS_MSR_DELTA_DSR
) {
378 if (new_msr
& MOS_MSR_DELTA_CD
) {
382 if (new_msr
& MOS_MSR_DELTA_RI
) {
389 static void mos7840_handle_new_lsr(struct moschip_port
*port
, __u8 new_lsr
)
391 struct async_icount
*icount
;
393 dbg("%s - %02x", __FUNCTION__
, new_lsr
);
395 if (new_lsr
& SERIAL_LSR_BI
) {
397 // Parity and Framing errors only count if they
398 // occur exclusive of a break being
401 new_lsr
&= (__u8
) (SERIAL_LSR_OE
| SERIAL_LSR_BI
);
404 /* update input line counters */
405 icount
= &port
->icount
;
406 if (new_lsr
& SERIAL_LSR_BI
) {
410 if (new_lsr
& SERIAL_LSR_OE
) {
414 if (new_lsr
& SERIAL_LSR_PE
) {
418 if (new_lsr
& SERIAL_LSR_FE
) {
424 /************************************************************************/
425 /************************************************************************/
426 /* U S B C A L L B A C K F U N C T I O N S */
427 /* U S B C A L L B A C K F U N C T I O N S */
428 /************************************************************************/
429 /************************************************************************/
431 static void mos7840_control_callback(struct urb
*urb
)
434 struct moschip_port
*mos7840_port
;
437 int status
= urb
->status
;
440 dbg("%s", "Invalid Pointer !!!!:\n");
444 mos7840_port
= (struct moschip_port
*)urb
->context
;
453 /* this urb is terminated, clean up */
454 dbg("%s - urb shutting down with status: %d", __FUNCTION__
,
458 dbg("%s - nonzero urb status received: %d", __FUNCTION__
,
463 dbg("%s urb buffer size is %d\n", __FUNCTION__
, urb
->actual_length
);
464 dbg("%s mos7840_port->MsrLsr is %d port %d\n", __FUNCTION__
,
465 mos7840_port
->MsrLsr
, mos7840_port
->port_num
);
466 data
= urb
->transfer_buffer
;
467 regval
= (__u8
) data
[0];
468 dbg("%s data is %x\n", __FUNCTION__
, regval
);
469 if (mos7840_port
->MsrLsr
== 0)
470 mos7840_handle_new_msr(mos7840_port
, regval
);
471 else if (mos7840_port
->MsrLsr
== 1)
472 mos7840_handle_new_lsr(mos7840_port
, regval
);
475 spin_lock(&mos7840_port
->pool_lock
);
476 if (!mos7840_port
->zombie
)
477 result
= usb_submit_urb(mos7840_port
->int_urb
, GFP_ATOMIC
);
478 spin_unlock(&mos7840_port
->pool_lock
);
480 dev_err(&urb
->dev
->dev
,
481 "%s - Error %d submitting interrupt urb\n",
482 __FUNCTION__
, result
);
486 static int mos7840_get_reg(struct moschip_port
*mcs
, __u16 Wval
, __u16 reg
,
489 struct usb_device
*dev
= mcs
->port
->serial
->dev
;
490 struct usb_ctrlrequest
*dr
= mcs
->dr
;
491 unsigned char *buffer
= mcs
->ctrl_buf
;
494 dr
->bRequestType
= MCS_RD_RTYPE
;
495 dr
->bRequest
= MCS_RDREQ
;
496 dr
->wValue
= cpu_to_le16(Wval
); //0;
497 dr
->wIndex
= cpu_to_le16(reg
);
498 dr
->wLength
= cpu_to_le16(2);
500 usb_fill_control_urb(mcs
->control_urb
, dev
, usb_rcvctrlpipe(dev
, 0),
501 (unsigned char *)dr
, buffer
, 2,
502 mos7840_control_callback
, mcs
);
503 mcs
->control_urb
->transfer_buffer_length
= 2;
504 ret
= usb_submit_urb(mcs
->control_urb
, GFP_ATOMIC
);
508 /*****************************************************************************
509 * mos7840_interrupt_callback
510 * this is the callback function for when we have received data on the
511 * interrupt endpoint.
512 *****************************************************************************/
514 static void mos7840_interrupt_callback(struct urb
*urb
)
518 struct moschip_port
*mos7840_port
;
519 struct usb_serial
*serial
;
524 __u16 wval
, wreg
= 0;
525 int status
= urb
->status
;
527 dbg("%s", " : Entering\n");
529 dbg("%s", "Invalid Pointer !!!!:\n");
540 /* this urb is terminated, clean up */
541 dbg("%s - urb shutting down with status: %d", __FUNCTION__
,
545 dbg("%s - nonzero urb status received: %d", __FUNCTION__
,
550 length
= urb
->actual_length
;
551 data
= urb
->transfer_buffer
;
553 serial
= (struct usb_serial
*)urb
->context
;
555 /* Moschip get 5 bytes
556 * Byte 1 IIR Port 1 (port.number is 0)
557 * Byte 2 IIR Port 2 (port.number is 1)
558 * Byte 3 IIR Port 3 (port.number is 2)
559 * Byte 4 IIR Port 4 (port.number is 3)
560 * Byte 5 FIFO status for both */
562 if (length
&& length
> 5) {
563 dbg("%s \n", "Wrong data !!!");
567 sp
[0] = (__u8
) data
[0];
568 sp
[1] = (__u8
) data
[1];
569 sp
[2] = (__u8
) data
[2];
570 sp
[3] = (__u8
) data
[3];
573 for (i
= 0; i
< serial
->num_ports
; i
++) {
574 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
576 (((__u16
) serial
->port
[i
]->number
-
577 (__u16
) (serial
->minor
)) + 1) << 8;
578 if (mos7840_port
->open
) {
580 dbg("SP%d No Interrupt !!!\n", i
);
582 switch (sp
[i
] & 0x0f) {
584 dbg("Serial Port %d: Receiver status error or ", i
);
585 dbg("address bit detected in 9-bit mode\n");
586 mos7840_port
->MsrLsr
= 1;
587 wreg
= LINE_STATUS_REGISTER
;
590 dbg("Serial Port %d: Modem status change\n", i
);
591 mos7840_port
->MsrLsr
= 0;
592 wreg
= MODEM_STATUS_REGISTER
;
595 spin_lock(&mos7840_port
->pool_lock
);
596 if (!mos7840_port
->zombie
) {
597 rv
= mos7840_get_reg(mos7840_port
, wval
, wreg
, &Data
);
599 spin_unlock(&mos7840_port
->pool_lock
);
602 spin_unlock(&mos7840_port
->pool_lock
);
606 if (!(rv
< 0)) /* the completion handler for the control urb will resubmit */
609 result
= usb_submit_urb(urb
, GFP_ATOMIC
);
611 dev_err(&urb
->dev
->dev
,
612 "%s - Error %d submitting interrupt urb\n",
613 __FUNCTION__
, result
);
617 static int mos7840_port_paranoia_check(struct usb_serial_port
*port
,
618 const char *function
)
621 dbg("%s - port == NULL", function
);
625 dbg("%s - port->serial == NULL", function
);
632 /* Inline functions to check the sanity of a pointer that is passed to us */
633 static int mos7840_serial_paranoia_check(struct usb_serial
*serial
,
634 const char *function
)
637 dbg("%s - serial == NULL", function
);
641 dbg("%s - serial->type == NULL!", function
);
648 static struct usb_serial
*mos7840_get_usb_serial(struct usb_serial_port
*port
,
649 const char *function
)
651 /* if no port was specified, or it fails a paranoia check */
653 mos7840_port_paranoia_check(port
, function
) ||
654 mos7840_serial_paranoia_check(port
->serial
, function
)) {
655 /* then say that we don't have a valid usb_serial thing, which will
656 * end up genrating -ENODEV return values */
663 /*****************************************************************************
664 * mos7840_bulk_in_callback
665 * this is the callback function for when we have received data on the
667 *****************************************************************************/
669 static void mos7840_bulk_in_callback(struct urb
*urb
)
673 struct usb_serial
*serial
;
674 struct usb_serial_port
*port
;
675 struct moschip_port
*mos7840_port
;
676 struct tty_struct
*tty
;
677 int status
= urb
->status
;
680 dbg("%s", "Invalid Pointer !!!!:\n");
685 dbg("nonzero read bulk status received: %d", status
);
689 mos7840_port
= (struct moschip_port
*)urb
->context
;
691 dbg("%s", "NULL mos7840_port pointer \n");
695 port
= (struct usb_serial_port
*)mos7840_port
->port
;
696 if (mos7840_port_paranoia_check(port
, __FUNCTION__
)) {
697 dbg("%s", "Port Paranoia failed \n");
701 serial
= mos7840_get_usb_serial(port
, __FUNCTION__
);
703 dbg("%s\n", "Bad serial pointer ");
707 dbg("%s\n", "Entering... \n");
709 data
= urb
->transfer_buffer
;
711 dbg("%s", "Entering ........... \n");
713 if (urb
->actual_length
) {
714 tty
= mos7840_port
->port
->tty
;
716 tty_buffer_request_room(tty
, urb
->actual_length
);
717 tty_insert_flip_string(tty
, data
, urb
->actual_length
);
719 tty_flip_buffer_push(tty
);
721 mos7840_port
->icount
.rx
+= urb
->actual_length
;
723 dbg("mos7840_port->icount.rx is %d:\n",
724 mos7840_port
->icount
.rx
);
727 if (!mos7840_port
->read_urb
) {
728 dbg("%s", "URB KILLED !!!\n");
733 mos7840_port
->read_urb
->dev
= serial
->dev
;
735 retval
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
738 dbg(" usb_submit_urb(read bulk) failed, retval = %d",
743 /*****************************************************************************
744 * mos7840_bulk_out_data_callback
745 * this is the callback function for when we have finished sending serial data
746 * on the bulk out endpoint.
747 *****************************************************************************/
749 static void mos7840_bulk_out_data_callback(struct urb
*urb
)
751 struct moschip_port
*mos7840_port
;
752 struct tty_struct
*tty
;
753 int status
= urb
->status
;
757 dbg("%s", "Invalid Pointer !!!!:\n");
761 mos7840_port
= (struct moschip_port
*)urb
->context
;
762 spin_lock(&mos7840_port
->pool_lock
);
763 for (i
= 0; i
< NUM_URBS
; i
++) {
764 if (urb
== mos7840_port
->write_urb_pool
[i
]) {
765 mos7840_port
->busy
[i
] = 0;
769 spin_unlock(&mos7840_port
->pool_lock
);
772 dbg("nonzero write bulk status received:%d\n", status
);
776 if (mos7840_port_paranoia_check(mos7840_port
->port
, __FUNCTION__
)) {
777 dbg("%s", "Port Paranoia failed \n");
781 dbg("%s \n", "Entering .........");
783 tty
= mos7840_port
->port
->tty
;
785 if (tty
&& mos7840_port
->open
)
790 /************************************************************************/
791 /* 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 */
792 /************************************************************************/
793 #ifdef MCSSerialProbe
794 static int mos7840_serial_probe(struct usb_serial
*serial
,
795 const struct usb_device_id
*id
)
798 /*need to implement the mode_reg reading and updating\
799 structures usb_serial_ device_type\
800 (i.e num_ports, num_bulkin,bulkout etc) */
801 /* Also we can update the changes attach */
806 /*****************************************************************************
808 * this function is called by the tty driver when a port is opened
809 * If successful, we return 0
810 * Otherwise we return a negative error number.
811 *****************************************************************************/
813 static int mos7840_open(struct usb_serial_port
*port
, struct file
*filp
)
817 struct usb_serial
*serial
;
821 struct moschip_port
*mos7840_port
;
822 struct moschip_port
*port0
;
824 if (mos7840_port_paranoia_check(port
, __FUNCTION__
)) {
825 dbg("%s", "Port Paranoia failed \n");
829 serial
= port
->serial
;
831 if (mos7840_serial_paranoia_check(serial
, __FUNCTION__
)) {
832 dbg("%s", "Serial Paranoia failed \n");
836 mos7840_port
= mos7840_get_port_private(port
);
837 port0
= mos7840_get_port_private(serial
->port
[0]);
839 if (mos7840_port
== NULL
|| port0
== NULL
)
842 usb_clear_halt(serial
->dev
, port
->write_urb
->pipe
);
843 usb_clear_halt(serial
->dev
, port
->read_urb
->pipe
);
846 /* Initialising the write urb pool */
847 for (j
= 0; j
< NUM_URBS
; ++j
) {
848 urb
= usb_alloc_urb(0, GFP_KERNEL
);
849 mos7840_port
->write_urb_pool
[j
] = urb
;
852 err("No more urbs???");
856 urb
->transfer_buffer
= kmalloc(URB_TRANSFER_BUFFER_SIZE
, GFP_KERNEL
);
857 if (!urb
->transfer_buffer
) {
859 mos7840_port
->write_urb_pool
[j
] = NULL
;
860 err("%s-out of memory for urb buffers.", __FUNCTION__
);
865 /*****************************************************************************
866 * Initialize MCS7840 -- Write Init values to corresponding Registers
874 * 0x08 : SP1/2 Control Reg
875 *****************************************************************************/
877 //NEED to check the following Block
881 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
, &Data
);
883 dbg("Reading Spreg failed\n");
887 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
889 dbg("writing Spreg failed\n");
894 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
896 dbg("writing Spreg failed\n");
899 //End of block to be checked
904 mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
, &Data
);
906 dbg("Reading Controlreg failed\n");
909 Data
|= 0x08; //Driver done bit
910 Data
|= 0x20; //rx_disable
911 status
= mos7840_set_reg_sync(port
, mos7840_port
->ControlRegOffset
, Data
);
913 dbg("writing Controlreg failed\n");
916 //do register settings here
917 // Set all regs to the device default values.
918 ////////////////////////////////////
919 // First Disable all interrupts.
920 ////////////////////////////////////
923 status
= mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
925 dbg("disableing interrupts failed\n");
928 // Set FIFO_CONTROL_REGISTER to the default value
930 status
= mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
932 dbg("Writing FIFO_CONTROL_REGISTER failed\n");
937 status
= mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
939 dbg("Writing FIFO_CONTROL_REGISTER failed\n");
944 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
945 mos7840_port
->shadowLCR
= Data
;
948 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
949 mos7840_port
->shadowMCR
= Data
;
952 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
953 mos7840_port
->shadowLCR
= Data
;
955 Data
|= SERIAL_LCR_DLAB
; //data latch enable in LCR 0x80
956 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
960 status
= mos7840_set_uart_reg(port
, DIVISOR_LATCH_LSB
, Data
);
964 status
= mos7840_set_uart_reg(port
, DIVISOR_LATCH_MSB
, Data
);
968 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
970 Data
= Data
& ~SERIAL_LCR_DLAB
;
972 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
973 mos7840_port
->shadowLCR
= Data
;
975 //clearing Bulkin and Bulkout Fifo
978 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
, &Data
);
982 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
986 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
987 //Finally enable all interrupts
991 status
= mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
993 //clearing rx_disable
997 mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
, &Data
);
1001 mos7840_set_reg_sync(port
, mos7840_port
->ControlRegOffset
, Data
);
1007 mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
, &Data
);
1011 mos7840_set_reg_sync(port
, mos7840_port
->ControlRegOffset
, Data
);
1013 /* force low_latency on so that our tty_push actually forces *
1014 * the data through,otherwise it is scheduled, and with *
1015 * high data rates (like with OHCI) data can get lost. */
1018 port
->tty
->low_latency
= 1;
1019 /* Check to see if we've set up our endpoint info yet *
1020 * (can't set it up in mos7840_startup as the structures *
1021 * were not set up at that time.) */
1022 if (port0
->open_ports
== 1) {
1023 if (serial
->port
[0]->interrupt_in_buffer
== NULL
) {
1025 /* set up interrupt urb */
1027 usb_fill_int_urb(serial
->port
[0]->interrupt_in_urb
,
1029 usb_rcvintpipe(serial
->dev
,
1031 interrupt_in_endpointAddress
),
1032 serial
->port
[0]->interrupt_in_buffer
,
1033 serial
->port
[0]->interrupt_in_urb
->
1034 transfer_buffer_length
,
1035 mos7840_interrupt_callback
,
1037 serial
->port
[0]->interrupt_in_urb
->
1040 /* start interrupt read for mos7840 *
1041 * will continue as long as mos7840 is connected */
1044 usb_submit_urb(serial
->port
[0]->interrupt_in_urb
,
1047 err("%s - Error %d submitting interrupt urb",
1048 __FUNCTION__
, response
);
1055 /* see if we've set up our endpoint info yet *
1056 * (can't set it up in mos7840_startup as the *
1057 * structures were not set up at that time.) */
1059 dbg("port number is %d \n", port
->number
);
1060 dbg("serial number is %d \n", port
->serial
->minor
);
1061 dbg("Bulkin endpoint is %d \n", port
->bulk_in_endpointAddress
);
1062 dbg("BulkOut endpoint is %d \n", port
->bulk_out_endpointAddress
);
1063 dbg("Interrupt endpoint is %d \n", port
->interrupt_in_endpointAddress
);
1064 dbg("port's number in the device is %d\n", mos7840_port
->port_num
);
1065 mos7840_port
->read_urb
= port
->read_urb
;
1067 /* set up our bulk in urb */
1069 usb_fill_bulk_urb(mos7840_port
->read_urb
,
1071 usb_rcvbulkpipe(serial
->dev
,
1072 port
->bulk_in_endpointAddress
),
1073 port
->bulk_in_buffer
,
1074 mos7840_port
->read_urb
->transfer_buffer_length
,
1075 mos7840_bulk_in_callback
, mos7840_port
);
1077 dbg("mos7840_open: bulkin endpoint is %d\n",
1078 port
->bulk_in_endpointAddress
);
1079 response
= usb_submit_urb(mos7840_port
->read_urb
, GFP_KERNEL
);
1081 err("%s - Error %d submitting control urb", __FUNCTION__
,
1085 /* initialize our wait queues */
1086 init_waitqueue_head(&mos7840_port
->wait_chase
);
1087 init_waitqueue_head(&mos7840_port
->delta_msr_wait
);
1089 /* initialize our icount structure */
1090 memset(&(mos7840_port
->icount
), 0x00, sizeof(mos7840_port
->icount
));
1092 /* initialize our port settings */
1093 mos7840_port
->shadowMCR
= MCR_MASTER_IE
; /* Must set to enable ints! */
1094 /* send a open port command */
1095 mos7840_port
->open
= 1;
1096 //mos7840_change_port_settings(mos7840_port,old_termios);
1097 mos7840_port
->icount
.tx
= 0;
1098 mos7840_port
->icount
.rx
= 0;
1100 dbg("\n\nusb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p\n\n", serial
, mos7840_port
, port
);
1106 /*****************************************************************************
1107 * mos7840_chars_in_buffer
1108 * this function is called by the tty driver when it wants to know how many
1109 * bytes of data we currently have outstanding in the port (data that has
1110 * been written, but hasn't made it out the port yet)
1111 * If successful, we return the number of bytes left to be written in the
1113 * Otherwise we return a negative error number.
1114 *****************************************************************************/
1116 static int mos7840_chars_in_buffer(struct usb_serial_port
*port
)
1120 unsigned long flags
;
1121 struct moschip_port
*mos7840_port
;
1123 dbg("%s \n", " mos7840_chars_in_buffer:entering ...........");
1125 if (mos7840_port_paranoia_check(port
, __FUNCTION__
)) {
1126 dbg("%s", "Invalid port \n");
1130 mos7840_port
= mos7840_get_port_private(port
);
1131 if (mos7840_port
== NULL
) {
1132 dbg("%s \n", "mos7840_break:leaving ...........");
1136 spin_lock_irqsave(&mos7840_port
->pool_lock
,flags
);
1137 for (i
= 0; i
< NUM_URBS
; ++i
) {
1138 if (mos7840_port
->busy
[i
]) {
1139 chars
+= URB_TRANSFER_BUFFER_SIZE
;
1142 spin_unlock_irqrestore(&mos7840_port
->pool_lock
,flags
);
1143 dbg("%s - returns %d", __FUNCTION__
, chars
);
1148 /************************************************************************
1150 * mos7840_block_until_tx_empty
1152 * This function will block the close until one of the following:
1154 * 2. The mos7840 has stopped
1155 * 3. A timout of 3 seconds without activity has expired
1157 ************************************************************************/
1158 static void mos7840_block_until_tx_empty(struct moschip_port
*mos7840_port
)
1160 int timeout
= HZ
/ 10;
1166 count
= mos7840_chars_in_buffer(mos7840_port
->port
);
1168 /* Check for Buffer status */
1173 /* Block the thread for a while */
1174 interruptible_sleep_on_timeout(&mos7840_port
->wait_chase
,
1177 /* No activity.. count down section */
1180 dbg("%s - TIMEOUT", __FUNCTION__
);
1183 /* Reset timout value back to seconds */
1189 /*****************************************************************************
1191 * this function is called by the tty driver when a port is closed
1192 *****************************************************************************/
1194 static void mos7840_close(struct usb_serial_port
*port
, struct file
*filp
)
1196 struct usb_serial
*serial
;
1197 struct moschip_port
*mos7840_port
;
1198 struct moschip_port
*port0
;
1202 dbg("%s\n", "mos7840_close:entering...");
1204 if (mos7840_port_paranoia_check(port
, __FUNCTION__
)) {
1205 dbg("%s", "Port Paranoia failed \n");
1209 serial
= mos7840_get_usb_serial(port
, __FUNCTION__
);
1211 dbg("%s", "Serial Paranoia failed \n");
1215 mos7840_port
= mos7840_get_port_private(port
);
1216 port0
= mos7840_get_port_private(serial
->port
[0]);
1218 if (mos7840_port
== NULL
|| port0
== NULL
)
1221 for (j
= 0; j
< NUM_URBS
; ++j
)
1222 usb_kill_urb(mos7840_port
->write_urb_pool
[j
]);
1224 /* Freeing Write URBs */
1225 for (j
= 0; j
< NUM_URBS
; ++j
) {
1226 if (mos7840_port
->write_urb_pool
[j
]) {
1227 if (mos7840_port
->write_urb_pool
[j
]->transfer_buffer
)
1228 kfree(mos7840_port
->write_urb_pool
[j
]->
1231 usb_free_urb(mos7840_port
->write_urb_pool
[j
]);
1236 /* flush and block until tx is empty */
1237 mos7840_block_until_tx_empty(mos7840_port
);
1240 /* While closing port, shutdown all bulk read, write *
1241 * and interrupt read if they exists */
1244 if (mos7840_port
->write_urb
) {
1245 dbg("%s", "Shutdown bulk write\n");
1246 usb_kill_urb(mos7840_port
->write_urb
);
1249 if (mos7840_port
->read_urb
) {
1250 dbg("%s", "Shutdown bulk read\n");
1251 usb_kill_urb(mos7840_port
->read_urb
);
1253 if ((&mos7840_port
->control_urb
)) {
1254 dbg("%s", "Shutdown control read\n");
1255 // usb_kill_urb (mos7840_port->control_urb);
1259 // if(mos7840_port->ctrl_buf != NULL)
1260 // kfree(mos7840_port->ctrl_buf);
1261 port0
->open_ports
--;
1262 dbg("mos7840_num_open_ports in close%d:in port%d\n",
1263 port0
->open_ports
, port
->number
);
1264 if (port0
->open_ports
== 0) {
1265 if (serial
->port
[0]->interrupt_in_urb
) {
1266 dbg("%s", "Shutdown interrupt_in_urb\n");
1267 usb_kill_urb(serial
->port
[0]->interrupt_in_urb
);
1271 if (mos7840_port
->write_urb
) {
1272 /* if this urb had a transfer buffer already (old tx) free it */
1274 if (mos7840_port
->write_urb
->transfer_buffer
!= NULL
) {
1275 kfree(mos7840_port
->write_urb
->transfer_buffer
);
1277 usb_free_urb(mos7840_port
->write_urb
);
1281 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
1284 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
1286 mos7840_port
->open
= 0;
1288 dbg("%s \n", "Leaving ............");
1291 /************************************************************************
1293 * mos7840_block_until_chase_response
1295 * This function will block the close until one of the following:
1296 * 1. Response to our Chase comes from mos7840
1297 * 2. A timout of 10 seconds without activity has expired
1298 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1300 ************************************************************************/
1302 static void mos7840_block_until_chase_response(struct moschip_port
1305 int timeout
= 1 * HZ
;
1310 count
= mos7840_chars_in_buffer(mos7840_port
->port
);
1312 /* Check for Buffer status */
1317 /* Block the thread for a while */
1318 interruptible_sleep_on_timeout(&mos7840_port
->wait_chase
,
1320 /* No activity.. count down section */
1323 dbg("%s - TIMEOUT", __FUNCTION__
);
1326 /* Reset timout value back to seconds */
1333 /*****************************************************************************
1335 * this function sends a break to the port
1336 *****************************************************************************/
1337 static void mos7840_break(struct usb_serial_port
*port
, int break_state
)
1340 struct usb_serial
*serial
;
1341 struct moschip_port
*mos7840_port
;
1343 dbg("%s \n", "Entering ...........");
1344 dbg("mos7840_break: Start\n");
1346 if (mos7840_port_paranoia_check(port
, __FUNCTION__
)) {
1347 dbg("%s", "Port Paranoia failed \n");
1351 serial
= mos7840_get_usb_serial(port
, __FUNCTION__
);
1353 dbg("%s", "Serial Paranoia failed \n");
1357 mos7840_port
= mos7840_get_port_private(port
);
1359 if (mos7840_port
== NULL
) {
1365 /* flush and block until tx is empty */
1366 mos7840_block_until_chase_response(mos7840_port
);
1369 if (break_state
== -1) {
1370 data
= mos7840_port
->shadowLCR
| LCR_SET_BREAK
;
1372 data
= mos7840_port
->shadowLCR
& ~LCR_SET_BREAK
;
1375 mos7840_port
->shadowLCR
= data
;
1376 dbg("mcs7840_break mos7840_port->shadowLCR is %x\n",
1377 mos7840_port
->shadowLCR
);
1378 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
,
1379 mos7840_port
->shadowLCR
);
1384 /*****************************************************************************
1385 * mos7840_write_room
1386 * this function is called by the tty driver when it wants to know how many
1387 * bytes of data we can accept for a specific port.
1388 * If successful, we return the amount of room that we have for this port
1389 * Otherwise we return a negative error number.
1390 *****************************************************************************/
1392 static int mos7840_write_room(struct usb_serial_port
*port
)
1396 unsigned long flags
;
1397 struct moschip_port
*mos7840_port
;
1399 dbg("%s \n", " mos7840_write_room:entering ...........");
1401 if (mos7840_port_paranoia_check(port
, __FUNCTION__
)) {
1402 dbg("%s", "Invalid port \n");
1403 dbg("%s \n", " mos7840_write_room:leaving ...........");
1407 mos7840_port
= mos7840_get_port_private(port
);
1408 if (mos7840_port
== NULL
) {
1409 dbg("%s \n", "mos7840_break:leaving ...........");
1413 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1414 for (i
= 0; i
< NUM_URBS
; ++i
) {
1415 if (!mos7840_port
->busy
[i
]) {
1416 room
+= URB_TRANSFER_BUFFER_SIZE
;
1419 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1421 room
= (room
== 0) ? 0 : room
- URB_TRANSFER_BUFFER_SIZE
+ 1;
1422 dbg("%s - returns %d", __FUNCTION__
, room
);
1427 /*****************************************************************************
1429 * this function is called by the tty driver when data should be written to
1431 * If successful, we return the number of bytes written, otherwise we
1432 * return a negative error number.
1433 *****************************************************************************/
1435 static int mos7840_write(struct usb_serial_port
*port
,
1436 const unsigned char *data
, int count
)
1442 unsigned long flags
;
1444 struct moschip_port
*mos7840_port
;
1445 struct usb_serial
*serial
;
1448 const unsigned char *current_position
= data
;
1449 unsigned char *data1
;
1450 dbg("%s \n", "entering ...........");
1451 //dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",mos7840_port->shadowLCR);
1456 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
1457 mos7840_port
->shadowLCR
= Data
;
1458 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data
);
1459 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1460 mos7840_port
->shadowLCR
);
1463 //status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data);
1464 //mos7840_port->shadowLCR=Data;//Need to add later
1466 Data
|= SERIAL_LCR_DLAB
; //data latch enable in LCR 0x80
1468 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1471 //status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data);
1474 status
= mos7840_get_uart_reg(port
, DIVISOR_LATCH_LSB
, &Data
);
1475 dbg("mos7840_write:DLL value is %x\n", Data
);
1479 status
= mos7840_get_uart_reg(port
, DIVISOR_LATCH_MSB
, &Data
);
1480 dbg("mos7840_write:DLM value is %x\n", Data
);
1482 Data
= Data
& ~SERIAL_LCR_DLAB
;
1483 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1484 mos7840_port
->shadowLCR
);
1486 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1489 if (mos7840_port_paranoia_check(port
, __FUNCTION__
)) {
1490 dbg("%s", "Port Paranoia failed \n");
1494 serial
= port
->serial
;
1495 if (mos7840_serial_paranoia_check(serial
, __FUNCTION__
)) {
1496 dbg("%s", "Serial Paranoia failed \n");
1500 mos7840_port
= mos7840_get_port_private(port
);
1501 if (mos7840_port
== NULL
) {
1502 dbg("%s", "mos7840_port is NULL\n");
1506 /* try to find a free urb in the list */
1509 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1510 for (i
= 0; i
< NUM_URBS
; ++i
) {
1511 if (!mos7840_port
->busy
[i
]) {
1512 mos7840_port
->busy
[i
] = 1;
1513 urb
= mos7840_port
->write_urb_pool
[i
];
1518 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1521 dbg("%s - no more free urbs", __FUNCTION__
);
1525 if (urb
->transfer_buffer
== NULL
) {
1526 urb
->transfer_buffer
=
1527 kmalloc(URB_TRANSFER_BUFFER_SIZE
, GFP_KERNEL
);
1529 if (urb
->transfer_buffer
== NULL
) {
1530 err("%s no more kernel memory...", __FUNCTION__
);
1534 transfer_size
= min(count
, URB_TRANSFER_BUFFER_SIZE
);
1536 memcpy(urb
->transfer_buffer
, current_position
, transfer_size
);
1538 /* fill urb with data and submit */
1539 usb_fill_bulk_urb(urb
,
1541 usb_sndbulkpipe(serial
->dev
,
1542 port
->bulk_out_endpointAddress
),
1543 urb
->transfer_buffer
,
1545 mos7840_bulk_out_data_callback
, mos7840_port
);
1547 data1
= urb
->transfer_buffer
;
1548 dbg("\nbulkout endpoint is %d", port
->bulk_out_endpointAddress
);
1550 /* send it down the pipe */
1551 status
= usb_submit_urb(urb
, GFP_ATOMIC
);
1554 mos7840_port
->busy
[i
] = 0;
1555 err("%s - usb_submit_urb(write bulk) failed with status = %d",
1556 __FUNCTION__
, status
);
1557 bytes_sent
= status
;
1560 bytes_sent
= transfer_size
;
1561 mos7840_port
->icount
.tx
+= transfer_size
;
1563 dbg("mos7840_port->icount.tx is %d:\n", mos7840_port
->icount
.tx
);
1570 /*****************************************************************************
1572 * this function is called by the tty driver when it wants to stop the data
1573 * being read from the port.
1574 *****************************************************************************/
1576 static void mos7840_throttle(struct usb_serial_port
*port
)
1578 struct moschip_port
*mos7840_port
;
1579 struct tty_struct
*tty
;
1582 if (mos7840_port_paranoia_check(port
, __FUNCTION__
)) {
1583 dbg("%s", "Invalid port \n");
1587 dbg("- port %d\n", port
->number
);
1589 mos7840_port
= mos7840_get_port_private(port
);
1591 if (mos7840_port
== NULL
)
1594 if (!mos7840_port
->open
) {
1595 dbg("%s\n", "port not opened");
1599 dbg("%s", "Entering .......... \n");
1603 dbg("%s - no tty available", __FUNCTION__
);
1607 /* if we are implementing XON/XOFF, send the stop character */
1609 unsigned char stop_char
= STOP_CHAR(tty
);
1610 status
= mos7840_write(port
, &stop_char
, 1);
1616 /* if we are implementing RTS/CTS, toggle that line */
1617 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1618 mos7840_port
->shadowMCR
&= ~MCR_RTS
;
1621 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1622 mos7840_port
->shadowMCR
);
1632 /*****************************************************************************
1633 * mos7840_unthrottle
1634 * this function is called by the tty driver when it wants to resume the data
1635 * being read from the port (called after SerialThrottle is called)
1636 *****************************************************************************/
1637 static void mos7840_unthrottle(struct usb_serial_port
*port
)
1639 struct tty_struct
*tty
;
1641 struct moschip_port
*mos7840_port
= mos7840_get_port_private(port
);
1643 if (mos7840_port_paranoia_check(port
, __FUNCTION__
)) {
1644 dbg("%s", "Invalid port \n");
1648 if (mos7840_port
== NULL
)
1651 if (!mos7840_port
->open
) {
1652 dbg("%s - port not opened", __FUNCTION__
);
1656 dbg("%s", "Entering .......... \n");
1660 dbg("%s - no tty available", __FUNCTION__
);
1664 /* if we are implementing XON/XOFF, send the start character */
1666 unsigned char start_char
= START_CHAR(tty
);
1667 status
= mos7840_write(port
, &start_char
, 1);
1673 /* if we are implementing RTS/CTS, toggle that line */
1674 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1675 mos7840_port
->shadowMCR
|= MCR_RTS
;
1678 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1679 mos7840_port
->shadowMCR
);
1688 static int mos7840_tiocmget(struct usb_serial_port
*port
, struct file
*file
)
1690 struct moschip_port
*mos7840_port
;
1691 unsigned int result
;
1695 mos7840_port
= mos7840_get_port_private(port
);
1697 dbg("%s - port %d", __FUNCTION__
, port
->number
);
1699 if (mos7840_port
== NULL
)
1702 status
= mos7840_get_uart_reg(port
, MODEM_STATUS_REGISTER
, &msr
);
1703 status
= mos7840_get_uart_reg(port
, MODEM_CONTROL_REGISTER
, &mcr
);
1704 result
= ((mcr
& MCR_DTR
) ? TIOCM_DTR
: 0)
1705 | ((mcr
& MCR_RTS
) ? TIOCM_RTS
: 0)
1706 | ((mcr
& MCR_LOOPBACK
) ? TIOCM_LOOP
: 0)
1707 | ((msr
& MOS7840_MSR_CTS
) ? TIOCM_CTS
: 0)
1708 | ((msr
& MOS7840_MSR_CD
) ? TIOCM_CAR
: 0)
1709 | ((msr
& MOS7840_MSR_RI
) ? TIOCM_RI
: 0)
1710 | ((msr
& MOS7840_MSR_DSR
) ? TIOCM_DSR
: 0);
1712 dbg("%s - 0x%04X", __FUNCTION__
, result
);
1717 static int mos7840_tiocmset(struct usb_serial_port
*port
, struct file
*file
,
1718 unsigned int set
, unsigned int clear
)
1720 struct moschip_port
*mos7840_port
;
1722 unsigned int status
;
1724 dbg("%s - port %d", __FUNCTION__
, port
->number
);
1726 mos7840_port
= mos7840_get_port_private(port
);
1728 if (mos7840_port
== NULL
)
1731 mcr
= mos7840_port
->shadowMCR
;
1732 if (clear
& TIOCM_RTS
)
1734 if (clear
& TIOCM_DTR
)
1736 if (clear
& TIOCM_LOOP
)
1737 mcr
&= ~MCR_LOOPBACK
;
1739 if (set
& TIOCM_RTS
)
1741 if (set
& TIOCM_DTR
)
1743 if (set
& TIOCM_LOOP
)
1744 mcr
|= MCR_LOOPBACK
;
1746 mos7840_port
->shadowMCR
= mcr
;
1749 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, mcr
);
1751 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
1758 /*****************************************************************************
1759 * mos7840_calc_baud_rate_divisor
1760 * this function calculates the proper baud rate divisor for the specified
1762 *****************************************************************************/
1763 static int mos7840_calc_baud_rate_divisor(int baudRate
, int *divisor
,
1764 __u16
* clk_sel_val
)
1767 dbg("%s - %d", __FUNCTION__
, baudRate
);
1769 if (baudRate
<= 115200) {
1770 *divisor
= 115200 / baudRate
;
1773 if ((baudRate
> 115200) && (baudRate
<= 230400)) {
1774 *divisor
= 230400 / baudRate
;
1775 *clk_sel_val
= 0x10;
1776 } else if ((baudRate
> 230400) && (baudRate
<= 403200)) {
1777 *divisor
= 403200 / baudRate
;
1778 *clk_sel_val
= 0x20;
1779 } else if ((baudRate
> 403200) && (baudRate
<= 460800)) {
1780 *divisor
= 460800 / baudRate
;
1781 *clk_sel_val
= 0x30;
1782 } else if ((baudRate
> 460800) && (baudRate
<= 806400)) {
1783 *divisor
= 806400 / baudRate
;
1784 *clk_sel_val
= 0x40;
1785 } else if ((baudRate
> 806400) && (baudRate
<= 921600)) {
1786 *divisor
= 921600 / baudRate
;
1787 *clk_sel_val
= 0x50;
1788 } else if ((baudRate
> 921600) && (baudRate
<= 1572864)) {
1789 *divisor
= 1572864 / baudRate
;
1790 *clk_sel_val
= 0x60;
1791 } else if ((baudRate
> 1572864) && (baudRate
<= 3145728)) {
1792 *divisor
= 3145728 / baudRate
;
1793 *clk_sel_val
= 0x70;
1799 for (i
= 0; i
< ARRAY_SIZE(mos7840_divisor_table
); i
++) {
1800 if (mos7840_divisor_table
[i
].BaudRate
== baudrate
) {
1801 *divisor
= mos7840_divisor_table
[i
].Divisor
;
1806 /* After trying for all the standard baud rates *
1807 * Try calculating the divisor for this baud rate */
1809 if (baudrate
> 75 && baudrate
< 230400) {
1810 /* get the divisor */
1811 custom
= (__u16
) (230400L / baudrate
);
1813 /* Check for round off */
1814 round1
= (__u16
) (2304000L / baudrate
);
1815 round
= (__u16
) (round1
- (custom
* 10));
1821 dbg(" Baud %d = %d\n", baudrate
, custom
);
1825 dbg("%s\n", " Baud calculation Failed...");
1830 /*****************************************************************************
1831 * mos7840_send_cmd_write_baud_rate
1832 * this function sends the proper command to change the baud rate of the
1834 *****************************************************************************/
1836 static int mos7840_send_cmd_write_baud_rate(struct moschip_port
*mos7840_port
,
1842 unsigned char number
;
1844 struct usb_serial_port
*port
;
1846 if (mos7840_port
== NULL
)
1849 port
= (struct usb_serial_port
*)mos7840_port
->port
;
1850 if (mos7840_port_paranoia_check(port
, __FUNCTION__
)) {
1851 dbg("%s", "Invalid port \n");
1855 if (mos7840_serial_paranoia_check(port
->serial
, __FUNCTION__
)) {
1856 dbg("%s", "Invalid Serial \n");
1860 dbg("%s", "Entering .......... \n");
1862 number
= mos7840_port
->port
->number
- mos7840_port
->port
->serial
->minor
;
1864 dbg("%s - port = %d, baud = %d", __FUNCTION__
,
1865 mos7840_port
->port
->number
, baudRate
);
1866 //reset clk_uart_sel in spregOffset
1867 if (baudRate
> 115200) {
1868 #ifdef HW_flow_control
1869 //NOTE: need to see the pther register to modify
1870 //setting h/w flow control bit to 1;
1873 mos7840_port
->shadowMCR
= Data
;
1875 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
1877 dbg("Writing spreg failed in set_serial_baud\n");
1883 #ifdef HW_flow_control
1884 //setting h/w flow control bit to 0;
1887 mos7840_port
->shadowMCR
= Data
;
1889 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
1891 dbg("Writing spreg failed in set_serial_baud\n");
1898 if (1) //baudRate <= 115200)
1904 mos7840_calc_baud_rate_divisor(baudRate
, &divisor
,
1907 mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
,
1910 dbg("reading spreg failed in set_serial_baud\n");
1913 Data
= (Data
& 0x8f) | clk_sel_val
;
1916 mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
1918 dbg("Writing spreg failed in set_serial_baud\n");
1921 /* Calculate the Divisor */
1924 err("%s - bad baud rate", __FUNCTION__
);
1925 dbg("%s\n", "bad baud rate");
1928 /* Enable access to divisor latch */
1929 Data
= mos7840_port
->shadowLCR
| SERIAL_LCR_DLAB
;
1930 mos7840_port
->shadowLCR
= Data
;
1931 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1933 /* Write the divisor */
1934 Data
= (unsigned char)(divisor
& 0xff);
1935 dbg("set_serial_baud Value to write DLL is %x\n", Data
);
1936 mos7840_set_uart_reg(port
, DIVISOR_LATCH_LSB
, Data
);
1938 Data
= (unsigned char)((divisor
& 0xff00) >> 8);
1939 dbg("set_serial_baud Value to write DLM is %x\n", Data
);
1940 mos7840_set_uart_reg(port
, DIVISOR_LATCH_MSB
, Data
);
1942 /* Disable access to divisor latch */
1943 Data
= mos7840_port
->shadowLCR
& ~SERIAL_LCR_DLAB
;
1944 mos7840_port
->shadowLCR
= Data
;
1945 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1952 /*****************************************************************************
1953 * mos7840_change_port_settings
1954 * This routine is called to set the UART on the device to match
1955 * the specified new settings.
1956 *****************************************************************************/
1958 static void mos7840_change_port_settings(struct moschip_port
*mos7840_port
,
1959 struct ktermios
*old_termios
)
1961 struct tty_struct
*tty
;
1970 struct usb_serial_port
*port
;
1971 struct usb_serial
*serial
;
1973 if (mos7840_port
== NULL
)
1976 port
= (struct usb_serial_port
*)mos7840_port
->port
;
1978 if (mos7840_port_paranoia_check(port
, __FUNCTION__
)) {
1979 dbg("%s", "Invalid port \n");
1983 if (mos7840_serial_paranoia_check(port
->serial
, __FUNCTION__
)) {
1984 dbg("%s", "Invalid Serial \n");
1988 serial
= port
->serial
;
1990 dbg("%s - port %d", __FUNCTION__
, mos7840_port
->port
->number
);
1992 if (!mos7840_port
->open
) {
1993 dbg("%s - port not opened", __FUNCTION__
);
1997 tty
= mos7840_port
->port
->tty
;
1999 if ((!tty
) || (!tty
->termios
)) {
2000 dbg("%s - no tty structures", __FUNCTION__
);
2004 dbg("%s", "Entering .......... \n");
2008 lParity
= LCR_PAR_NONE
;
2010 cflag
= tty
->termios
->c_cflag
;
2011 iflag
= tty
->termios
->c_iflag
;
2013 /* Change the number of bits */
2014 if (cflag
& CSIZE
) {
2015 switch (cflag
& CSIZE
) {
2033 /* Change the Parity bit */
2034 if (cflag
& PARENB
) {
2035 if (cflag
& PARODD
) {
2036 lParity
= LCR_PAR_ODD
;
2037 dbg("%s - parity = odd", __FUNCTION__
);
2039 lParity
= LCR_PAR_EVEN
;
2040 dbg("%s - parity = even", __FUNCTION__
);
2044 dbg("%s - parity = none", __FUNCTION__
);
2047 if (cflag
& CMSPAR
) {
2048 lParity
= lParity
| 0x20;
2051 /* Change the Stop bit */
2052 if (cflag
& CSTOPB
) {
2054 dbg("%s - stop bits = 2", __FUNCTION__
);
2057 dbg("%s - stop bits = 1", __FUNCTION__
);
2060 /* Update the LCR with the correct value */
2061 mos7840_port
->shadowLCR
&=
2062 ~(LCR_BITS_MASK
| LCR_STOP_MASK
| LCR_PAR_MASK
);
2063 mos7840_port
->shadowLCR
|= (lData
| lParity
| lStop
);
2065 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x\n",
2066 mos7840_port
->shadowLCR
);
2067 /* Disable Interrupts */
2069 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
2072 mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
2075 mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
2077 /* Send the updated LCR value to the mos7840 */
2078 Data
= mos7840_port
->shadowLCR
;
2080 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
2083 mos7840_port
->shadowMCR
= Data
;
2084 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2086 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2088 /* set up the MCR register and send it to the mos7840 */
2090 mos7840_port
->shadowMCR
= MCR_MASTER_IE
;
2091 if (cflag
& CBAUD
) {
2092 mos7840_port
->shadowMCR
|= (MCR_DTR
| MCR_RTS
);
2095 if (cflag
& CRTSCTS
) {
2096 mos7840_port
->shadowMCR
|= (MCR_XON_ANY
);
2099 mos7840_port
->shadowMCR
&= ~(MCR_XON_ANY
);
2102 Data
= mos7840_port
->shadowMCR
;
2103 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2105 /* Determine divisor based on baud rate */
2106 baud
= tty_get_baud_rate(tty
);
2109 /* pick a default, any default... */
2110 dbg("%s\n", "Picked default baud...");
2114 dbg("%s - baud rate = %d", __FUNCTION__
, baud
);
2115 status
= mos7840_send_cmd_write_baud_rate(mos7840_port
, baud
);
2117 /* Enable Interrupts */
2119 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
2121 if (mos7840_port
->read_urb
->status
!= -EINPROGRESS
) {
2122 mos7840_port
->read_urb
->dev
= serial
->dev
;
2124 status
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
2127 dbg(" usb_submit_urb(read bulk) failed, status = %d",
2131 wake_up(&mos7840_port
->delta_msr_wait
);
2132 mos7840_port
->delta_msr_cond
= 1;
2133 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x\n",
2134 mos7840_port
->shadowLCR
);
2139 /*****************************************************************************
2140 * mos7840_set_termios
2141 * this function is called by the tty driver when it wants to change
2142 * the termios structure
2143 *****************************************************************************/
2145 static void mos7840_set_termios(struct usb_serial_port
*port
,
2146 struct ktermios
*old_termios
)
2150 struct usb_serial
*serial
;
2151 struct moschip_port
*mos7840_port
;
2152 struct tty_struct
*tty
;
2153 dbg("mos7840_set_termios: START\n");
2154 if (mos7840_port_paranoia_check(port
, __FUNCTION__
)) {
2155 dbg("%s", "Invalid port \n");
2159 serial
= port
->serial
;
2161 if (mos7840_serial_paranoia_check(serial
, __FUNCTION__
)) {
2162 dbg("%s", "Invalid Serial \n");
2166 mos7840_port
= mos7840_get_port_private(port
);
2168 if (mos7840_port
== NULL
)
2173 if (!port
->tty
|| !port
->tty
->termios
) {
2174 dbg("%s - no tty or termios", __FUNCTION__
);
2178 if (!mos7840_port
->open
) {
2179 dbg("%s - port not opened", __FUNCTION__
);
2183 dbg("%s\n", "setting termios - ");
2185 cflag
= tty
->termios
->c_cflag
;
2188 dbg("%s %s\n", __FUNCTION__
, "cflag is NULL");
2192 dbg("%s - clfag %08x iflag %08x", __FUNCTION__
,
2193 tty
->termios
->c_cflag
, RELEVANT_IFLAG(tty
->termios
->c_iflag
));
2196 dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__
,
2197 old_termios
->c_cflag
, RELEVANT_IFLAG(old_termios
->c_iflag
));
2200 dbg("%s - port %d", __FUNCTION__
, port
->number
);
2202 /* change the port settings to the new ones specified */
2204 mos7840_change_port_settings(mos7840_port
, old_termios
);
2206 if (!mos7840_port
->read_urb
) {
2207 dbg("%s", "URB KILLED !!!!!\n");
2211 if (mos7840_port
->read_urb
->status
!= -EINPROGRESS
) {
2212 mos7840_port
->read_urb
->dev
= serial
->dev
;
2213 status
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
2215 dbg(" usb_submit_urb(read bulk) failed, status = %d",
2222 /*****************************************************************************
2223 * mos7840_get_lsr_info - get line status register info
2225 * Purpose: Let user call ioctl() to get info when the UART physically
2226 * is emptied. On bus types like RS485, the transmitter must
2227 * release the bus after transmitting. This must be done when
2228 * the transmit shift register is empty, not be done when the
2229 * transmit holding register is empty. This functionality
2230 * allows an RS485 driver to be written in user space.
2231 *****************************************************************************/
2233 static int mos7840_get_lsr_info(struct moschip_port
*mos7840_port
,
2234 unsigned int __user
*value
)
2237 unsigned int result
= 0;
2239 count
= mos7840_chars_in_buffer(mos7840_port
->port
);
2241 dbg("%s -- Empty", __FUNCTION__
);
2242 result
= TIOCSER_TEMT
;
2245 if (copy_to_user(value
, &result
, sizeof(int)))
2250 /*****************************************************************************
2251 * mos7840_set_modem_info
2252 * function to set modem info
2253 *****************************************************************************/
2255 static int mos7840_set_modem_info(struct moschip_port
*mos7840_port
,
2256 unsigned int cmd
, unsigned int __user
*value
)
2262 struct usb_serial_port
*port
;
2264 if (mos7840_port
== NULL
)
2267 port
= (struct usb_serial_port
*)mos7840_port
->port
;
2268 if (mos7840_port_paranoia_check(port
, __FUNCTION__
)) {
2269 dbg("%s", "Invalid port \n");
2273 mcr
= mos7840_port
->shadowMCR
;
2275 if (copy_from_user(&arg
, value
, sizeof(int)))
2280 if (arg
& TIOCM_RTS
)
2282 if (arg
& TIOCM_DTR
)
2284 if (arg
& TIOCM_LOOP
)
2285 mcr
|= MCR_LOOPBACK
;
2289 if (arg
& TIOCM_RTS
)
2291 if (arg
& TIOCM_DTR
)
2293 if (arg
& TIOCM_LOOP
)
2294 mcr
&= ~MCR_LOOPBACK
;
2298 /* turn off the RTS and DTR and LOOPBACK
2299 * and then only turn on what was asked to */
2300 mcr
&= ~(MCR_RTS
| MCR_DTR
| MCR_LOOPBACK
);
2301 mcr
|= ((arg
& TIOCM_RTS
) ? MCR_RTS
: 0);
2302 mcr
|= ((arg
& TIOCM_DTR
) ? MCR_DTR
: 0);
2303 mcr
|= ((arg
& TIOCM_LOOP
) ? MCR_LOOPBACK
: 0);
2307 mos7840_port
->shadowMCR
= mcr
;
2309 Data
= mos7840_port
->shadowMCR
;
2311 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2313 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
2320 /*****************************************************************************
2321 * mos7840_get_modem_info
2322 * function to get modem info
2323 *****************************************************************************/
2325 static int mos7840_get_modem_info(struct moschip_port
*mos7840_port
,
2326 unsigned int __user
*value
)
2328 unsigned int result
= 0;
2330 unsigned int mcr
= mos7840_port
->shadowMCR
;
2333 mos7840_get_uart_reg(mos7840_port
->port
, MODEM_STATUS_REGISTER
,
2335 result
= ((mcr
& MCR_DTR
) ? TIOCM_DTR
: 0) /* 0x002 */
2336 |((mcr
& MCR_RTS
) ? TIOCM_RTS
: 0) /* 0x004 */
2337 |((msr
& MOS7840_MSR_CTS
) ? TIOCM_CTS
: 0) /* 0x020 */
2338 |((msr
& MOS7840_MSR_CD
) ? TIOCM_CAR
: 0) /* 0x040 */
2339 |((msr
& MOS7840_MSR_RI
) ? TIOCM_RI
: 0) /* 0x080 */
2340 |((msr
& MOS7840_MSR_DSR
) ? TIOCM_DSR
: 0); /* 0x100 */
2342 dbg("%s -- %x", __FUNCTION__
, result
);
2344 if (copy_to_user(value
, &result
, sizeof(int)))
2349 /*****************************************************************************
2350 * mos7840_get_serial_info
2351 * function to get information about serial port
2352 *****************************************************************************/
2354 static int mos7840_get_serial_info(struct moschip_port
*mos7840_port
,
2355 struct serial_struct __user
*retinfo
)
2357 struct serial_struct tmp
;
2359 if (mos7840_port
== NULL
)
2365 memset(&tmp
, 0, sizeof(tmp
));
2367 tmp
.type
= PORT_16550A
;
2368 tmp
.line
= mos7840_port
->port
->serial
->minor
;
2369 tmp
.port
= mos7840_port
->port
->number
;
2371 tmp
.flags
= ASYNC_SKIP_TEST
| ASYNC_AUTO_IRQ
;
2372 tmp
.xmit_fifo_size
= NUM_URBS
* URB_TRANSFER_BUFFER_SIZE
;
2373 tmp
.baud_base
= 9600;
2374 tmp
.close_delay
= 5 * HZ
;
2375 tmp
.closing_wait
= 30 * HZ
;
2377 if (copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)))
2382 /*****************************************************************************
2384 * this function handles any ioctl calls to the driver
2385 *****************************************************************************/
2387 static int mos7840_ioctl(struct usb_serial_port
*port
, struct file
*file
,
2388 unsigned int cmd
, unsigned long arg
)
2390 void __user
*argp
= (void __user
*)arg
;
2391 struct moschip_port
*mos7840_port
;
2392 struct tty_struct
*tty
;
2394 struct async_icount cnow
;
2395 struct async_icount cprev
;
2396 struct serial_icounter_struct icount
;
2399 if (mos7840_port_paranoia_check(port
, __FUNCTION__
)) {
2400 dbg("%s", "Invalid port \n");
2404 mos7840_port
= mos7840_get_port_private(port
);
2406 if (mos7840_port
== NULL
)
2409 tty
= mos7840_port
->port
->tty
;
2411 dbg("%s - port %d, cmd = 0x%x", __FUNCTION__
, port
->number
, cmd
);
2414 /* return number of bytes available */
2417 dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__
, port
->number
);
2418 return mos7840_get_lsr_info(mos7840_port
, argp
);
2424 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__
,
2427 mos7840_set_modem_info(mos7840_port
, cmd
, argp
);
2431 dbg("%s (%d) TIOCMGET", __FUNCTION__
, port
->number
);
2432 return mos7840_get_modem_info(mos7840_port
, argp
);
2435 dbg("%s (%d) TIOCGSERIAL", __FUNCTION__
, port
->number
);
2436 return mos7840_get_serial_info(mos7840_port
, argp
);
2439 dbg("%s (%d) TIOCSSERIAL", __FUNCTION__
, port
->number
);
2443 dbg("%s (%d) TIOCMIWAIT", __FUNCTION__
, port
->number
);
2444 cprev
= mos7840_port
->icount
;
2446 //interruptible_sleep_on(&mos7840_port->delta_msr_wait);
2447 mos7840_port
->delta_msr_cond
= 0;
2448 wait_event_interruptible(mos7840_port
->delta_msr_wait
,
2450 delta_msr_cond
== 1));
2452 /* see if a signal did it */
2453 if (signal_pending(current
))
2454 return -ERESTARTSYS
;
2455 cnow
= mos7840_port
->icount
;
2457 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
2458 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
)
2459 return -EIO
; /* no change => error */
2460 if (((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
.rng
)) ||
2461 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
.dsr
)) ||
2462 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
.dcd
)) ||
2463 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
.cts
))) {
2472 cnow
= mos7840_port
->icount
;
2474 icount
.cts
= cnow
.cts
;
2475 icount
.dsr
= cnow
.dsr
;
2476 icount
.rng
= cnow
.rng
;
2477 icount
.dcd
= cnow
.dcd
;
2478 icount
.rx
= cnow
.rx
;
2479 icount
.tx
= cnow
.tx
;
2480 icount
.frame
= cnow
.frame
;
2481 icount
.overrun
= cnow
.overrun
;
2482 icount
.parity
= cnow
.parity
;
2483 icount
.brk
= cnow
.brk
;
2484 icount
.buf_overrun
= cnow
.buf_overrun
;
2486 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__
,
2487 port
->number
, icount
.rx
, icount
.tx
);
2488 if (copy_to_user(argp
, &icount
, sizeof(icount
)))
2498 return -ENOIOCTLCMD
;
2501 static int mos7840_calc_num_ports(struct usb_serial
*serial
)
2503 int mos7840_num_ports
= 0;
2505 dbg("numberofendpoints: %d \n",
2506 (int)serial
->interface
->cur_altsetting
->desc
.bNumEndpoints
);
2507 dbg("numberofendpoints: %d \n",
2508 (int)serial
->interface
->altsetting
->desc
.bNumEndpoints
);
2509 if (serial
->interface
->cur_altsetting
->desc
.bNumEndpoints
== 5) {
2510 mos7840_num_ports
= serial
->num_ports
= 2;
2511 } else if (serial
->interface
->cur_altsetting
->desc
.bNumEndpoints
== 9) {
2512 serial
->num_bulk_in
= 4;
2513 serial
->num_bulk_out
= 4;
2514 mos7840_num_ports
= serial
->num_ports
= 4;
2517 return mos7840_num_ports
;
2520 /****************************************************************************
2522 ****************************************************************************/
2524 static int mos7840_startup(struct usb_serial
*serial
)
2526 struct moschip_port
*mos7840_port
;
2527 struct usb_device
*dev
;
2531 dbg("%s \n", " mos7840_startup :entering..........");
2534 dbg("%s\n", "Invalid Handler");
2540 dbg("%s\n", "Entering...");
2542 /* we set up the pointers to the endpoints in the mos7840_open *
2543 * function, as the structures aren't created yet. */
2545 /* set up port private structures */
2546 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2547 mos7840_port
= kzalloc(sizeof(struct moschip_port
), GFP_KERNEL
);
2548 if (mos7840_port
== NULL
) {
2549 err("%s - Out of memory", __FUNCTION__
);
2551 i
--; /* don't follow NULL pointer cleaning up */
2555 /* Initialize all port interrupt end point to port 0 int endpoint *
2556 * Our device has only one interrupt end point comman to all port */
2558 mos7840_port
->port
= serial
->port
[i
];
2559 mos7840_set_port_private(serial
->port
[i
], mos7840_port
);
2560 spin_lock_init(&mos7840_port
->pool_lock
);
2562 mos7840_port
->port_num
= ((serial
->port
[i
]->number
-
2563 (serial
->port
[i
]->serial
->minor
)) +
2566 if (mos7840_port
->port_num
== 1) {
2567 mos7840_port
->SpRegOffset
= 0x0;
2568 mos7840_port
->ControlRegOffset
= 0x1;
2569 mos7840_port
->DcrRegOffset
= 0x4;
2570 } else if ((mos7840_port
->port_num
== 2)
2571 && (serial
->num_ports
== 4)) {
2572 mos7840_port
->SpRegOffset
= 0x8;
2573 mos7840_port
->ControlRegOffset
= 0x9;
2574 mos7840_port
->DcrRegOffset
= 0x16;
2575 } else if ((mos7840_port
->port_num
== 2)
2576 && (serial
->num_ports
== 2)) {
2577 mos7840_port
->SpRegOffset
= 0xa;
2578 mos7840_port
->ControlRegOffset
= 0xb;
2579 mos7840_port
->DcrRegOffset
= 0x19;
2580 } else if ((mos7840_port
->port_num
== 3)
2581 && (serial
->num_ports
== 4)) {
2582 mos7840_port
->SpRegOffset
= 0xa;
2583 mos7840_port
->ControlRegOffset
= 0xb;
2584 mos7840_port
->DcrRegOffset
= 0x19;
2585 } else if ((mos7840_port
->port_num
== 4)
2586 && (serial
->num_ports
== 4)) {
2587 mos7840_port
->SpRegOffset
= 0xc;
2588 mos7840_port
->ControlRegOffset
= 0xd;
2589 mos7840_port
->DcrRegOffset
= 0x1c;
2591 mos7840_dump_serial_port(mos7840_port
);
2593 mos7840_set_port_private(serial
->port
[i
], mos7840_port
);
2595 //enable rx_disable bit in control register
2598 mos7840_get_reg_sync(serial
->port
[i
],
2599 mos7840_port
->ControlRegOffset
, &Data
);
2601 dbg("Reading ControlReg failed status-0x%x\n", status
);
2604 dbg("ControlReg Reading success val is %x, status%d\n",
2606 Data
|= 0x08; //setting driver done bit
2607 Data
|= 0x04; //sp1_bit to have cts change reflect in modem status reg
2609 //Data |= 0x20; //rx_disable bit
2612 mos7840_set_reg_sync(serial
->port
[i
],
2613 mos7840_port
->ControlRegOffset
, Data
);
2615 dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status
);
2618 dbg("ControlReg Writing success(rx_disable) status%d\n",
2621 //Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 and 0x24 in DCR3
2625 mos7840_set_reg_sync(serial
->port
[i
],
2626 (__u16
) (mos7840_port
->DcrRegOffset
+
2629 dbg("Writing DCR0 failed status-0x%x\n", status
);
2632 dbg("DCR0 Writing success status%d\n", status
);
2637 mos7840_set_reg_sync(serial
->port
[i
],
2638 (__u16
) (mos7840_port
->DcrRegOffset
+
2641 dbg("Writing DCR1 failed status-0x%x\n", status
);
2644 dbg("DCR1 Writing success status%d\n", status
);
2649 mos7840_set_reg_sync(serial
->port
[i
],
2650 (__u16
) (mos7840_port
->DcrRegOffset
+
2653 dbg("Writing DCR2 failed status-0x%x\n", status
);
2656 dbg("DCR2 Writing success status%d\n", status
);
2658 // write values in clkstart0x0 and clkmulti 0x20
2662 mos7840_set_reg_sync(serial
->port
[i
],
2663 CLK_START_VALUE_REGISTER
, Data
);
2665 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status
);
2668 dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status
);
2672 mos7840_set_reg_sync(serial
->port
[i
], CLK_MULTI_REGISTER
,
2675 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n",
2679 dbg("CLK_MULTI_REGISTER Writing success status%d\n",
2682 //write value 0x0 to scratchpad register
2685 mos7840_set_uart_reg(serial
->port
[i
], SCRATCH_PAD_REGISTER
,
2688 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n",
2692 dbg("SCRATCH_PAD_REGISTER Writing success status%d\n",
2695 //Zero Length flag register
2696 if ((mos7840_port
->port_num
!= 1)
2697 && (serial
->num_ports
== 2)) {
2701 status
= mos7840_set_reg_sync(serial
->port
[i
],
2707 dbg("ZLIP offset%x\n",
2709 ((__u16
) mos7840_port
->port_num
)));
2711 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2715 dbg("ZLP_REG%d Writing success status%d\n",
2720 status
= mos7840_set_reg_sync(serial
->port
[i
],
2726 dbg("ZLIP offset%x\n",
2728 ((__u16
) mos7840_port
->port_num
) - 0x1));
2730 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2734 dbg("ZLP_REG%d Writing success status%d\n",
2738 mos7840_port
->control_urb
= usb_alloc_urb(0, GFP_KERNEL
);
2739 mos7840_port
->ctrl_buf
= kmalloc(16, GFP_KERNEL
);
2740 mos7840_port
->dr
= kmalloc(sizeof(struct usb_ctrlrequest
), GFP_KERNEL
);
2741 if (!mos7840_port
->control_urb
|| !mos7840_port
->ctrl_buf
|| !mos7840_port
->dr
) {
2747 //Zero Length flag enable
2749 status
= mos7840_set_reg_sync(serial
->port
[0], ZLP_REG5
, Data
);
2751 dbg("Writing ZLP_REG5 failed status-0x%x\n", status
);
2754 dbg("ZLP_REG5 Writing success status%d\n", status
);
2756 /* setting configuration feature to one */
2757 usb_control_msg(serial
->dev
, usb_sndctrlpipe(serial
->dev
, 0),
2758 (__u8
) 0x03, 0x00, 0x01, 0x00, NULL
, 0x00, 5 * HZ
);
2761 for (/* nothing */; i
>= 0; i
--) {
2762 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
2764 kfree(mos7840_port
->dr
);
2765 kfree(mos7840_port
->ctrl_buf
);
2766 usb_free_urb(mos7840_port
->control_urb
);
2767 kfree(mos7840_port
);
2768 serial
->port
[i
] = NULL
;
2773 /****************************************************************************
2775 * This function is called whenever the device is removed from the usb bus.
2776 ****************************************************************************/
2778 static void mos7840_shutdown(struct usb_serial
*serial
)
2781 unsigned long flags
;
2782 struct moschip_port
*mos7840_port
;
2783 dbg("%s \n", " shutdown :entering..........");
2786 dbg("%s", "Invalid Handler \n");
2790 /* check for the ports to be closed,close the ports and disconnect */
2792 /* free private structure allocated for serial port *
2793 * stop reads and writes on all ports */
2795 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2796 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
2797 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
2798 mos7840_port
->zombie
= 1;
2799 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
2800 usb_kill_urb(mos7840_port
->control_urb
);
2801 kfree(mos7840_port
->ctrl_buf
);
2802 kfree(mos7840_port
->dr
);
2803 kfree(mos7840_port
);
2804 mos7840_set_port_private(serial
->port
[i
], NULL
);
2807 dbg("%s\n", "Thank u :: ");
2811 static struct usb_driver io_driver
= {
2813 .probe
= usb_serial_probe
,
2814 .disconnect
= usb_serial_disconnect
,
2815 .id_table
= moschip_id_table_combined
,
2819 static struct usb_serial_driver moschip7840_4port_device
= {
2821 .owner
= THIS_MODULE
,
2824 .description
= DRIVER_DESC
,
2825 .usb_driver
= &io_driver
,
2826 .id_table
= moschip_port_id_table
,
2827 .num_interrupt_in
= 1, //NUM_DONT_CARE,//1,
2833 .open
= mos7840_open
,
2834 .close
= mos7840_close
,
2835 .write
= mos7840_write
,
2836 .write_room
= mos7840_write_room
,
2837 .chars_in_buffer
= mos7840_chars_in_buffer
,
2838 .throttle
= mos7840_throttle
,
2839 .unthrottle
= mos7840_unthrottle
,
2840 .calc_num_ports
= mos7840_calc_num_ports
,
2841 #ifdef MCSSerialProbe
2842 .probe
= mos7840_serial_probe
,
2844 .ioctl
= mos7840_ioctl
,
2845 .set_termios
= mos7840_set_termios
,
2846 .break_ctl
= mos7840_break
,
2847 .tiocmget
= mos7840_tiocmget
,
2848 .tiocmset
= mos7840_tiocmset
,
2849 .attach
= mos7840_startup
,
2850 .shutdown
= mos7840_shutdown
,
2851 .read_bulk_callback
= mos7840_bulk_in_callback
,
2852 .read_int_callback
= mos7840_interrupt_callback
,
2855 /****************************************************************************
2857 * This is called by the module subsystem, or on startup to initialize us
2858 ****************************************************************************/
2859 static int __init
moschip7840_init(void)
2863 dbg("%s \n", " mos7840_init :entering..........");
2865 /* Register with the usb serial */
2866 retval
= usb_serial_register(&moschip7840_4port_device
);
2869 goto failed_port_device_register
;
2871 dbg("%s\n", "Entring...");
2872 info(DRIVER_DESC
" " DRIVER_VERSION
);
2874 /* Register with the usb */
2875 retval
= usb_register(&io_driver
);
2878 goto failed_usb_register
;
2881 dbg("%s\n", "Leaving...");
2885 failed_usb_register
:
2886 usb_serial_deregister(&moschip7840_4port_device
);
2888 failed_port_device_register
:
2893 /****************************************************************************
2895 * Called when the driver is about to be unloaded.
2896 ****************************************************************************/
2897 static void __exit
moschip7840_exit(void)
2900 dbg("%s \n", " mos7840_exit :entering..........");
2902 usb_deregister(&io_driver
);
2904 usb_serial_deregister(&moschip7840_4port_device
);
2906 dbg("%s\n", "Entring...");
2909 module_init(moschip7840_init
);
2910 module_exit(moschip7840_exit
);
2912 /* Module information */
2913 MODULE_DESCRIPTION(DRIVER_DESC
);
2914 MODULE_LICENSE("GPL");
2916 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
2917 MODULE_PARM_DESC(debug
, "Debug enabled or not");