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 "1.3.2"
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 /* This driver also supports the ATEN UC2324 device since it is mos7840 based
127 * - if I knew the device id it would also support the ATEN UC2322 */
128 #define USB_VENDOR_ID_ATENINTL 0x0557
129 #define ATENINTL_DEVICE_ID_UC2324 0x2011
131 /* Interrupt Routine Defines */
133 #define SERIAL_IIR_RLS 0x06
134 #define SERIAL_IIR_MS 0x00
137 * Emulation of the bit mask on the LINE STATUS REGISTER.
139 #define SERIAL_LSR_DR 0x0001
140 #define SERIAL_LSR_OE 0x0002
141 #define SERIAL_LSR_PE 0x0004
142 #define SERIAL_LSR_FE 0x0008
143 #define SERIAL_LSR_BI 0x0010
145 #define MOS_MSR_DELTA_CTS 0x10
146 #define MOS_MSR_DELTA_DSR 0x20
147 #define MOS_MSR_DELTA_RI 0x40
148 #define MOS_MSR_DELTA_CD 0x80
150 /* Serial Port register Address */
151 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
152 #define FIFO_CONTROL_REGISTER ((__u16)(0x02))
153 #define LINE_CONTROL_REGISTER ((__u16)(0x03))
154 #define MODEM_CONTROL_REGISTER ((__u16)(0x04))
155 #define LINE_STATUS_REGISTER ((__u16)(0x05))
156 #define MODEM_STATUS_REGISTER ((__u16)(0x06))
157 #define SCRATCH_PAD_REGISTER ((__u16)(0x07))
158 #define DIVISOR_LATCH_LSB ((__u16)(0x00))
159 #define DIVISOR_LATCH_MSB ((__u16)(0x01))
161 #define CLK_MULTI_REGISTER ((__u16)(0x02))
162 #define CLK_START_VALUE_REGISTER ((__u16)(0x03))
164 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
167 * URB POOL related defines
169 #define NUM_URBS 16 /* URB Count */
170 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
173 static struct usb_device_id moschip_port_id_table
[] = {
174 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7840
)},
175 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7820
)},
176 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_4
)},
177 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_2
)},
178 {USB_DEVICE(USB_VENDOR_ID_ATENINTL
, ATENINTL_DEVICE_ID_UC2324
)},
179 {} /* terminating entry */
182 static __devinitdata
struct usb_device_id moschip_id_table_combined
[] = {
183 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7840
)},
184 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7820
)},
185 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_4
)},
186 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_2
)},
187 {USB_DEVICE(USB_VENDOR_ID_ATENINTL
, ATENINTL_DEVICE_ID_UC2324
)},
188 {} /* terminating entry */
191 MODULE_DEVICE_TABLE(usb
, moschip_id_table_combined
);
193 /* This structure holds all of the local port information */
195 struct moschip_port
{
196 int port_num
; /*Actual port number in the device(1,2,etc) */
197 struct urb
*write_urb
; /* write URB for this port */
198 struct urb
*read_urb
; /* read URB for this port */
200 __u8 shadowLCR
; /* last LCR value received */
201 __u8 shadowMCR
; /* last MCR value received */
205 wait_queue_head_t wait_chase
; /* for handling sleeping while waiting for chase to finish */
206 wait_queue_head_t delta_msr_wait
; /* for handling sleeping while waiting for msr change to happen */
208 struct async_icount icount
;
209 struct usb_serial_port
*port
; /* loop back to the owner of this object */
213 __u8 ControlRegOffset
;
215 /* for processing control URBS in interrupt context */
216 struct urb
*control_urb
;
217 struct usb_ctrlrequest
*dr
;
221 spinlock_t pool_lock
;
222 struct urb
*write_urb_pool
[NUM_URBS
];
231 * mos7840_set_reg_sync
232 * To set the Control register by calling usb_fill_control_urb function
233 * by passing usb_sndctrlpipe function as parameter.
236 static int mos7840_set_reg_sync(struct usb_serial_port
*port
, __u16 reg
,
239 struct usb_device
*dev
= port
->serial
->dev
;
241 dbg("mos7840_set_reg_sync offset is %x, value %x", reg
, val
);
243 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), MCS_WRREQ
,
244 MCS_WR_RTYPE
, val
, reg
, NULL
, 0,
249 * mos7840_get_reg_sync
250 * To set the Uart register by calling usb_fill_control_urb function by
251 * passing usb_rcvctrlpipe function as parameter.
254 static int mos7840_get_reg_sync(struct usb_serial_port
*port
, __u16 reg
,
257 struct usb_device
*dev
= port
->serial
->dev
;
260 ret
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0), MCS_RDREQ
,
261 MCS_RD_RTYPE
, 0, reg
, val
, VENDOR_READ_LENGTH
,
263 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg
, *val
);
264 *val
= (*val
) & 0x00ff;
269 * mos7840_set_uart_reg
270 * To set the Uart register by calling usb_fill_control_urb function by
271 * passing usb_sndctrlpipe function as parameter.
274 static int mos7840_set_uart_reg(struct usb_serial_port
*port
, __u16 reg
,
278 struct usb_device
*dev
= port
->serial
->dev
;
280 /* For the UART control registers, the application number need
282 if (port
->serial
->num_ports
== 4) {
283 val
|= (((__u16
) port
->number
-
284 (__u16
) (port
->serial
->minor
)) + 1) << 8;
285 dbg("mos7840_set_uart_reg application number is %x", val
);
287 if (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) == 0) {
288 val
|= (((__u16
) port
->number
-
289 (__u16
) (port
->serial
->minor
)) + 1) << 8;
290 dbg("mos7840_set_uart_reg application number is %x",
294 (((__u16
) port
->number
-
295 (__u16
) (port
->serial
->minor
)) + 2) << 8;
296 dbg("mos7840_set_uart_reg application number is %x",
300 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), MCS_WRREQ
,
301 MCS_WR_RTYPE
, val
, reg
, NULL
, 0,
307 * mos7840_get_uart_reg
308 * To set the Control register by calling usb_fill_control_urb function
309 * by passing usb_rcvctrlpipe function as parameter.
311 static int mos7840_get_uart_reg(struct usb_serial_port
*port
, __u16 reg
,
314 struct usb_device
*dev
= port
->serial
->dev
;
318 /* dbg("application number is %4x",
319 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
320 /* Wval is same as application number */
321 if (port
->serial
->num_ports
== 4) {
323 (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) +
325 dbg("mos7840_get_uart_reg application number is %x", Wval
);
327 if (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) == 0) {
328 Wval
= (((__u16
) port
->number
-
329 (__u16
) (port
->serial
->minor
)) + 1) << 8;
330 dbg("mos7840_get_uart_reg application number is %x",
333 Wval
= (((__u16
) port
->number
-
334 (__u16
) (port
->serial
->minor
)) + 2) << 8;
335 dbg("mos7840_get_uart_reg application number is %x",
339 ret
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0), MCS_RDREQ
,
340 MCS_RD_RTYPE
, Wval
, reg
, val
, VENDOR_READ_LENGTH
,
342 *val
= (*val
) & 0x00ff;
346 static void mos7840_dump_serial_port(struct moschip_port
*mos7840_port
)
349 dbg("***************************************");
350 dbg("SpRegOffset is %2x", mos7840_port
->SpRegOffset
);
351 dbg("ControlRegOffset is %2x", mos7840_port
->ControlRegOffset
);
352 dbg("DCRRegOffset is %2x", mos7840_port
->DcrRegOffset
);
353 dbg("***************************************");
357 /************************************************************************/
358 /************************************************************************/
359 /* I N T E R F A C E F U N C T I O N S */
360 /* I N T E R F A C E F U N C T I O N S */
361 /************************************************************************/
362 /************************************************************************/
364 static inline void mos7840_set_port_private(struct usb_serial_port
*port
,
365 struct moschip_port
*data
)
367 usb_set_serial_port_data(port
, (void *)data
);
370 static inline struct moschip_port
*mos7840_get_port_private(struct
374 return (struct moschip_port
*)usb_get_serial_port_data(port
);
377 static void mos7840_handle_new_msr(struct moschip_port
*port
, __u8 new_msr
)
379 struct moschip_port
*mos7840_port
;
380 struct async_icount
*icount
;
382 icount
= &mos7840_port
->icount
;
384 (MOS_MSR_DELTA_CTS
| MOS_MSR_DELTA_DSR
| MOS_MSR_DELTA_RI
|
386 icount
= &mos7840_port
->icount
;
388 /* update input line counters */
389 if (new_msr
& MOS_MSR_DELTA_CTS
) {
393 if (new_msr
& MOS_MSR_DELTA_DSR
) {
397 if (new_msr
& MOS_MSR_DELTA_CD
) {
401 if (new_msr
& MOS_MSR_DELTA_RI
) {
408 static void mos7840_handle_new_lsr(struct moschip_port
*port
, __u8 new_lsr
)
410 struct async_icount
*icount
;
412 dbg("%s - %02x", __func__
, new_lsr
);
414 if (new_lsr
& SERIAL_LSR_BI
) {
416 * Parity and Framing errors only count if they
417 * occur exclusive of a break being
420 new_lsr
&= (__u8
) (SERIAL_LSR_OE
| SERIAL_LSR_BI
);
423 /* update input line counters */
424 icount
= &port
->icount
;
425 if (new_lsr
& SERIAL_LSR_BI
) {
429 if (new_lsr
& SERIAL_LSR_OE
) {
433 if (new_lsr
& SERIAL_LSR_PE
) {
437 if (new_lsr
& SERIAL_LSR_FE
) {
443 /************************************************************************/
444 /************************************************************************/
445 /* U S B C A L L B A C K F U N C T I O N S */
446 /* U S B C A L L B A C K F U N C T I O N S */
447 /************************************************************************/
448 /************************************************************************/
450 static void mos7840_control_callback(struct urb
*urb
)
453 struct moschip_port
*mos7840_port
;
456 int status
= urb
->status
;
458 mos7840_port
= urb
->context
;
467 /* this urb is terminated, clean up */
468 dbg("%s - urb shutting down with status: %d", __func__
,
472 dbg("%s - nonzero urb status received: %d", __func__
,
477 dbg("%s urb buffer size is %d", __func__
, urb
->actual_length
);
478 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__
,
479 mos7840_port
->MsrLsr
, mos7840_port
->port_num
);
480 data
= urb
->transfer_buffer
;
481 regval
= (__u8
) data
[0];
482 dbg("%s data is %x", __func__
, regval
);
483 if (mos7840_port
->MsrLsr
== 0)
484 mos7840_handle_new_msr(mos7840_port
, regval
);
485 else if (mos7840_port
->MsrLsr
== 1)
486 mos7840_handle_new_lsr(mos7840_port
, regval
);
489 spin_lock(&mos7840_port
->pool_lock
);
490 if (!mos7840_port
->zombie
)
491 result
= usb_submit_urb(mos7840_port
->int_urb
, GFP_ATOMIC
);
492 spin_unlock(&mos7840_port
->pool_lock
);
494 dev_err(&urb
->dev
->dev
,
495 "%s - Error %d submitting interrupt urb\n",
500 static int mos7840_get_reg(struct moschip_port
*mcs
, __u16 Wval
, __u16 reg
,
503 struct usb_device
*dev
= mcs
->port
->serial
->dev
;
504 struct usb_ctrlrequest
*dr
= mcs
->dr
;
505 unsigned char *buffer
= mcs
->ctrl_buf
;
508 dr
->bRequestType
= MCS_RD_RTYPE
;
509 dr
->bRequest
= MCS_RDREQ
;
510 dr
->wValue
= cpu_to_le16(Wval
); /* 0 */
511 dr
->wIndex
= cpu_to_le16(reg
);
512 dr
->wLength
= cpu_to_le16(2);
514 usb_fill_control_urb(mcs
->control_urb
, dev
, usb_rcvctrlpipe(dev
, 0),
515 (unsigned char *)dr
, buffer
, 2,
516 mos7840_control_callback
, mcs
);
517 mcs
->control_urb
->transfer_buffer_length
= 2;
518 ret
= usb_submit_urb(mcs
->control_urb
, GFP_ATOMIC
);
522 /*****************************************************************************
523 * mos7840_interrupt_callback
524 * this is the callback function for when we have received data on the
525 * interrupt endpoint.
526 *****************************************************************************/
528 static void mos7840_interrupt_callback(struct urb
*urb
)
532 struct moschip_port
*mos7840_port
;
533 struct usb_serial
*serial
;
538 __u16 wval
, wreg
= 0;
539 int status
= urb
->status
;
541 dbg("%s", " : Entering");
550 /* this urb is terminated, clean up */
551 dbg("%s - urb shutting down with status: %d", __func__
,
555 dbg("%s - nonzero urb status received: %d", __func__
,
560 length
= urb
->actual_length
;
561 data
= urb
->transfer_buffer
;
563 serial
= urb
->context
;
565 /* Moschip get 5 bytes
566 * Byte 1 IIR Port 1 (port.number is 0)
567 * Byte 2 IIR Port 2 (port.number is 1)
568 * Byte 3 IIR Port 3 (port.number is 2)
569 * Byte 4 IIR Port 4 (port.number is 3)
570 * Byte 5 FIFO status for both */
572 if (length
&& length
> 5) {
573 dbg("%s", "Wrong data !!!");
577 sp
[0] = (__u8
) data
[0];
578 sp
[1] = (__u8
) data
[1];
579 sp
[2] = (__u8
) data
[2];
580 sp
[3] = (__u8
) data
[3];
583 for (i
= 0; i
< serial
->num_ports
; i
++) {
584 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
586 (((__u16
) serial
->port
[i
]->number
-
587 (__u16
) (serial
->minor
)) + 1) << 8;
588 if (mos7840_port
->open
) {
590 dbg("SP%d No Interrupt !!!", i
);
592 switch (sp
[i
] & 0x0f) {
594 dbg("Serial Port %d: Receiver status error or ", i
);
595 dbg("address bit detected in 9-bit mode");
596 mos7840_port
->MsrLsr
= 1;
597 wreg
= LINE_STATUS_REGISTER
;
600 dbg("Serial Port %d: Modem status change", i
);
601 mos7840_port
->MsrLsr
= 0;
602 wreg
= MODEM_STATUS_REGISTER
;
605 spin_lock(&mos7840_port
->pool_lock
);
606 if (!mos7840_port
->zombie
) {
607 rv
= mos7840_get_reg(mos7840_port
, wval
, wreg
, &Data
);
609 spin_unlock(&mos7840_port
->pool_lock
);
612 spin_unlock(&mos7840_port
->pool_lock
);
617 /* the completion handler for the control urb will resubmit */
620 result
= usb_submit_urb(urb
, GFP_ATOMIC
);
622 dev_err(&urb
->dev
->dev
,
623 "%s - Error %d submitting interrupt urb\n",
628 static int mos7840_port_paranoia_check(struct usb_serial_port
*port
,
629 const char *function
)
632 dbg("%s - port == NULL", function
);
636 dbg("%s - port->serial == NULL", function
);
643 /* Inline functions to check the sanity of a pointer that is passed to us */
644 static int mos7840_serial_paranoia_check(struct usb_serial
*serial
,
645 const char *function
)
648 dbg("%s - serial == NULL", function
);
652 dbg("%s - serial->type == NULL!", function
);
659 static struct usb_serial
*mos7840_get_usb_serial(struct usb_serial_port
*port
,
660 const char *function
)
662 /* if no port was specified, or it fails a paranoia check */
664 mos7840_port_paranoia_check(port
, function
) ||
665 mos7840_serial_paranoia_check(port
->serial
, function
)) {
666 /* then say that we don't have a valid usb_serial thing,
667 * which will end up genrating -ENODEV return values */
674 /*****************************************************************************
675 * mos7840_bulk_in_callback
676 * this is the callback function for when we have received data on the
678 *****************************************************************************/
680 static void mos7840_bulk_in_callback(struct urb
*urb
)
684 struct usb_serial
*serial
;
685 struct usb_serial_port
*port
;
686 struct moschip_port
*mos7840_port
;
687 struct tty_struct
*tty
;
688 int status
= urb
->status
;
690 mos7840_port
= urb
->context
;
692 dbg("%s", "NULL mos7840_port pointer");
693 mos7840_port
->read_urb_busy
= false;
698 dbg("nonzero read bulk status received: %d", status
);
699 mos7840_port
->read_urb_busy
= false;
703 port
= (struct usb_serial_port
*)mos7840_port
->port
;
704 if (mos7840_port_paranoia_check(port
, __func__
)) {
705 dbg("%s", "Port Paranoia failed");
706 mos7840_port
->read_urb_busy
= false;
710 serial
= mos7840_get_usb_serial(port
, __func__
);
712 dbg("%s", "Bad serial pointer");
713 mos7840_port
->read_urb_busy
= false;
717 dbg("%s", "Entering... ");
719 data
= urb
->transfer_buffer
;
721 dbg("%s", "Entering ...........");
723 if (urb
->actual_length
) {
724 tty
= tty_port_tty_get(&mos7840_port
->port
->port
);
726 tty_buffer_request_room(tty
, urb
->actual_length
);
727 tty_insert_flip_string(tty
, data
, urb
->actual_length
);
729 tty_flip_buffer_push(tty
);
732 mos7840_port
->icount
.rx
+= urb
->actual_length
;
734 dbg("mos7840_port->icount.rx is %d:",
735 mos7840_port
->icount
.rx
);
738 if (!mos7840_port
->read_urb
) {
739 dbg("%s", "URB KILLED !!!");
740 mos7840_port
->read_urb_busy
= false;
745 mos7840_port
->read_urb
->dev
= serial
->dev
;
747 mos7840_port
->read_urb_busy
= true;
748 retval
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
751 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval
);
752 mos7840_port
->read_urb_busy
= false;
756 /*****************************************************************************
757 * mos7840_bulk_out_data_callback
758 * this is the callback function for when we have finished sending
759 * serial data on the bulk out endpoint.
760 *****************************************************************************/
762 static void mos7840_bulk_out_data_callback(struct urb
*urb
)
764 struct moschip_port
*mos7840_port
;
765 struct tty_struct
*tty
;
766 int status
= urb
->status
;
769 mos7840_port
= urb
->context
;
770 spin_lock(&mos7840_port
->pool_lock
);
771 for (i
= 0; i
< NUM_URBS
; i
++) {
772 if (urb
== mos7840_port
->write_urb_pool
[i
]) {
773 mos7840_port
->busy
[i
] = 0;
777 spin_unlock(&mos7840_port
->pool_lock
);
780 dbg("nonzero write bulk status received:%d", status
);
784 if (mos7840_port_paranoia_check(mos7840_port
->port
, __func__
)) {
785 dbg("%s", "Port Paranoia failed");
789 dbg("%s", "Entering .........");
791 tty
= tty_port_tty_get(&mos7840_port
->port
->port
);
792 if (tty
&& mos7840_port
->open
)
798 /************************************************************************/
799 /* 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 */
800 /************************************************************************/
801 #ifdef MCSSerialProbe
802 static int mos7840_serial_probe(struct usb_serial
*serial
,
803 const struct usb_device_id
*id
)
806 /*need to implement the mode_reg reading and updating\
807 structures usb_serial_ device_type\
808 (i.e num_ports, num_bulkin,bulkout etc) */
809 /* Also we can update the changes attach */
814 /*****************************************************************************
816 * this function is called by the tty driver when a port is opened
817 * If successful, we return 0
818 * Otherwise we return a negative error number.
819 *****************************************************************************/
821 static int mos7840_open(struct tty_struct
*tty
,
822 struct usb_serial_port
*port
, struct file
*filp
)
826 struct usb_serial
*serial
;
830 struct moschip_port
*mos7840_port
;
831 struct moschip_port
*port0
;
833 dbg ("%s enter", __func__
);
835 if (mos7840_port_paranoia_check(port
, __func__
)) {
836 dbg("%s", "Port Paranoia failed");
840 serial
= port
->serial
;
842 if (mos7840_serial_paranoia_check(serial
, __func__
)) {
843 dbg("%s", "Serial Paranoia failed");
847 mos7840_port
= mos7840_get_port_private(port
);
848 port0
= mos7840_get_port_private(serial
->port
[0]);
850 if (mos7840_port
== NULL
|| port0
== NULL
)
853 usb_clear_halt(serial
->dev
, port
->write_urb
->pipe
);
854 usb_clear_halt(serial
->dev
, port
->read_urb
->pipe
);
857 /* Initialising the write urb pool */
858 for (j
= 0; j
< NUM_URBS
; ++j
) {
859 urb
= usb_alloc_urb(0, GFP_KERNEL
);
860 mos7840_port
->write_urb_pool
[j
] = urb
;
863 dev_err(&port
->dev
, "No more urbs???\n");
867 urb
->transfer_buffer
= kmalloc(URB_TRANSFER_BUFFER_SIZE
,
869 if (!urb
->transfer_buffer
) {
871 mos7840_port
->write_urb_pool
[j
] = NULL
;
873 "%s-out of memory for urb buffers.\n",
879 /*****************************************************************************
880 * Initialize MCS7840 -- Write Init values to corresponding Registers
888 * 0x08 : SP1/2 Control Reg
889 *****************************************************************************/
891 /* NEED to check the following Block */
894 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
, &Data
);
896 dbg("Reading Spreg failed");
900 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
902 dbg("writing Spreg failed");
907 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
909 dbg("writing Spreg failed");
912 /* End of block to be checked */
915 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
918 dbg("Reading Controlreg failed");
921 Data
|= 0x08; /* Driver done bit */
922 Data
|= 0x20; /* rx_disable */
923 status
= mos7840_set_reg_sync(port
,
924 mos7840_port
->ControlRegOffset
, Data
);
926 dbg("writing Controlreg failed");
929 /* do register settings here */
930 /* Set all regs to the device default values. */
931 /***********************************
932 * First Disable all interrupts.
933 ***********************************/
935 status
= mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
937 dbg("disabling interrupts failed");
940 /* Set FIFO_CONTROL_REGISTER to the default value */
942 status
= mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
944 dbg("Writing FIFO_CONTROL_REGISTER failed");
949 status
= mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
951 dbg("Writing FIFO_CONTROL_REGISTER failed");
956 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
957 mos7840_port
->shadowLCR
= Data
;
960 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
961 mos7840_port
->shadowMCR
= Data
;
964 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
965 mos7840_port
->shadowLCR
= Data
;
967 Data
|= SERIAL_LCR_DLAB
; /* data latch enable in LCR 0x80 */
968 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
971 status
= mos7840_set_uart_reg(port
, DIVISOR_LATCH_LSB
, Data
);
974 status
= mos7840_set_uart_reg(port
, DIVISOR_LATCH_MSB
, Data
);
977 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
979 Data
= Data
& ~SERIAL_LCR_DLAB
;
980 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
981 mos7840_port
->shadowLCR
= Data
;
983 /* clearing Bulkin and Bulkout Fifo */
985 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
, &Data
);
988 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
991 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
992 /* Finally enable all interrupts */
994 status
= mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
996 /* clearing rx_disable */
998 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1000 Data
= Data
& ~0x20;
1001 status
= mos7840_set_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1006 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1009 status
= mos7840_set_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1012 /* Check to see if we've set up our endpoint info yet *
1013 * (can't set it up in mos7840_startup as the structures *
1014 * were not set up at that time.) */
1015 if (port0
->open_ports
== 1) {
1016 if (serial
->port
[0]->interrupt_in_buffer
== NULL
) {
1017 /* set up interrupt urb */
1018 usb_fill_int_urb(serial
->port
[0]->interrupt_in_urb
,
1020 usb_rcvintpipe(serial
->dev
,
1021 serial
->port
[0]->interrupt_in_endpointAddress
),
1022 serial
->port
[0]->interrupt_in_buffer
,
1023 serial
->port
[0]->interrupt_in_urb
->
1024 transfer_buffer_length
,
1025 mos7840_interrupt_callback
,
1027 serial
->port
[0]->interrupt_in_urb
->interval
);
1029 /* start interrupt read for mos7840 *
1030 * will continue as long as mos7840 is connected */
1033 usb_submit_urb(serial
->port
[0]->interrupt_in_urb
,
1036 dev_err(&port
->dev
, "%s - Error %d submitting "
1037 "interrupt urb\n", __func__
, response
);
1044 /* see if we've set up our endpoint info yet *
1045 * (can't set it up in mos7840_startup as the *
1046 * structures were not set up at that time.) */
1048 dbg("port number is %d", port
->number
);
1049 dbg("serial number is %d", port
->serial
->minor
);
1050 dbg("Bulkin endpoint is %d", port
->bulk_in_endpointAddress
);
1051 dbg("BulkOut endpoint is %d", port
->bulk_out_endpointAddress
);
1052 dbg("Interrupt endpoint is %d", port
->interrupt_in_endpointAddress
);
1053 dbg("port's number in the device is %d", mos7840_port
->port_num
);
1054 mos7840_port
->read_urb
= port
->read_urb
;
1056 /* set up our bulk in urb */
1058 usb_fill_bulk_urb(mos7840_port
->read_urb
,
1060 usb_rcvbulkpipe(serial
->dev
,
1061 port
->bulk_in_endpointAddress
),
1062 port
->bulk_in_buffer
,
1063 mos7840_port
->read_urb
->transfer_buffer_length
,
1064 mos7840_bulk_in_callback
, mos7840_port
);
1066 dbg("mos7840_open: bulkin endpoint is %d",
1067 port
->bulk_in_endpointAddress
);
1068 mos7840_port
->read_urb_busy
= true;
1069 response
= usb_submit_urb(mos7840_port
->read_urb
, GFP_KERNEL
);
1071 dev_err(&port
->dev
, "%s - Error %d submitting control urb\n",
1072 __func__
, response
);
1073 mos7840_port
->read_urb_busy
= false;
1076 /* initialize our wait queues */
1077 init_waitqueue_head(&mos7840_port
->wait_chase
);
1078 init_waitqueue_head(&mos7840_port
->delta_msr_wait
);
1080 /* initialize our icount structure */
1081 memset(&(mos7840_port
->icount
), 0x00, sizeof(mos7840_port
->icount
));
1083 /* initialize our port settings */
1084 /* Must set to enable ints! */
1085 mos7840_port
->shadowMCR
= MCR_MASTER_IE
;
1086 /* send a open port command */
1087 mos7840_port
->open
= 1;
1088 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1089 mos7840_port
->icount
.tx
= 0;
1090 mos7840_port
->icount
.rx
= 0;
1092 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p",
1093 serial
, mos7840_port
, port
);
1095 dbg ("%s leave", __func__
);
1101 /*****************************************************************************
1102 * mos7840_chars_in_buffer
1103 * this function is called by the tty driver when it wants to know how many
1104 * bytes of data we currently have outstanding in the port (data that has
1105 * been written, but hasn't made it out the port yet)
1106 * If successful, we return the number of bytes left to be written in the
1108 * Otherwise we return zero.
1109 *****************************************************************************/
1111 static int mos7840_chars_in_buffer(struct tty_struct
*tty
)
1113 struct usb_serial_port
*port
= tty
->driver_data
;
1116 unsigned long flags
;
1117 struct moschip_port
*mos7840_port
;
1119 dbg("%s", " mos7840_chars_in_buffer:entering ...........");
1121 if (mos7840_port_paranoia_check(port
, __func__
)) {
1122 dbg("%s", "Invalid port");
1126 mos7840_port
= mos7840_get_port_private(port
);
1127 if (mos7840_port
== NULL
) {
1128 dbg("%s", "mos7840_break:leaving ...........");
1132 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1133 for (i
= 0; i
< NUM_URBS
; ++i
)
1134 if (mos7840_port
->busy
[i
])
1135 chars
+= URB_TRANSFER_BUFFER_SIZE
;
1136 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1137 dbg("%s - returns %d", __func__
, chars
);
1142 /*****************************************************************************
1144 * this function is called by the tty driver when a port is closed
1145 *****************************************************************************/
1147 static void mos7840_close(struct usb_serial_port
*port
)
1149 struct usb_serial
*serial
;
1150 struct moschip_port
*mos7840_port
;
1151 struct moschip_port
*port0
;
1155 dbg("%s", "mos7840_close:entering...");
1157 if (mos7840_port_paranoia_check(port
, __func__
)) {
1158 dbg("%s", "Port Paranoia failed");
1162 serial
= mos7840_get_usb_serial(port
, __func__
);
1164 dbg("%s", "Serial Paranoia failed");
1168 mos7840_port
= mos7840_get_port_private(port
);
1169 port0
= mos7840_get_port_private(serial
->port
[0]);
1171 if (mos7840_port
== NULL
|| port0
== NULL
)
1174 for (j
= 0; j
< NUM_URBS
; ++j
)
1175 usb_kill_urb(mos7840_port
->write_urb_pool
[j
]);
1177 /* Freeing Write URBs */
1178 for (j
= 0; j
< NUM_URBS
; ++j
) {
1179 if (mos7840_port
->write_urb_pool
[j
]) {
1180 if (mos7840_port
->write_urb_pool
[j
]->transfer_buffer
)
1181 kfree(mos7840_port
->write_urb_pool
[j
]->
1184 usb_free_urb(mos7840_port
->write_urb_pool
[j
]);
1188 /* While closing port, shutdown all bulk read, write *
1189 * and interrupt read if they exists */
1191 if (mos7840_port
->write_urb
) {
1192 dbg("%s", "Shutdown bulk write");
1193 usb_kill_urb(mos7840_port
->write_urb
);
1195 if (mos7840_port
->read_urb
) {
1196 dbg("%s", "Shutdown bulk read");
1197 usb_kill_urb(mos7840_port
->read_urb
);
1198 mos7840_port
->read_urb_busy
= false;
1200 if ((&mos7840_port
->control_urb
)) {
1201 dbg("%s", "Shutdown control read");
1202 /*/ usb_kill_urb (mos7840_port->control_urb); */
1205 /* if(mos7840_port->ctrl_buf != NULL) */
1206 /* kfree(mos7840_port->ctrl_buf); */
1207 port0
->open_ports
--;
1208 dbg("mos7840_num_open_ports in close%d:in port%d",
1209 port0
->open_ports
, port
->number
);
1210 if (port0
->open_ports
== 0) {
1211 if (serial
->port
[0]->interrupt_in_urb
) {
1212 dbg("%s", "Shutdown interrupt_in_urb");
1213 usb_kill_urb(serial
->port
[0]->interrupt_in_urb
);
1217 if (mos7840_port
->write_urb
) {
1218 /* if this urb had a transfer buffer already (old tx) free it */
1219 if (mos7840_port
->write_urb
->transfer_buffer
!= NULL
)
1220 kfree(mos7840_port
->write_urb
->transfer_buffer
);
1221 usb_free_urb(mos7840_port
->write_urb
);
1225 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
1228 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
1230 mos7840_port
->open
= 0;
1232 dbg("%s", "Leaving ............");
1235 /************************************************************************
1237 * mos7840_block_until_chase_response
1239 * This function will block the close until one of the following:
1240 * 1. Response to our Chase comes from mos7840
1241 * 2. A timeout of 10 seconds without activity has expired
1242 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1244 ************************************************************************/
1246 static void mos7840_block_until_chase_response(struct tty_struct
*tty
,
1247 struct moschip_port
*mos7840_port
)
1249 int timeout
= 1 * HZ
;
1254 count
= mos7840_chars_in_buffer(tty
);
1256 /* Check for Buffer status */
1260 /* Block the thread for a while */
1261 interruptible_sleep_on_timeout(&mos7840_port
->wait_chase
,
1263 /* No activity.. count down section */
1266 dbg("%s - TIMEOUT", __func__
);
1269 /* Reset timeout value back to seconds */
1276 /*****************************************************************************
1278 * this function sends a break to the port
1279 *****************************************************************************/
1280 static void mos7840_break(struct tty_struct
*tty
, int break_state
)
1282 struct usb_serial_port
*port
= tty
->driver_data
;
1284 struct usb_serial
*serial
;
1285 struct moschip_port
*mos7840_port
;
1287 dbg("%s", "Entering ...........");
1288 dbg("mos7840_break: Start");
1290 if (mos7840_port_paranoia_check(port
, __func__
)) {
1291 dbg("%s", "Port Paranoia failed");
1295 serial
= mos7840_get_usb_serial(port
, __func__
);
1297 dbg("%s", "Serial Paranoia failed");
1301 mos7840_port
= mos7840_get_port_private(port
);
1303 if (mos7840_port
== NULL
)
1307 /* flush and block until tx is empty */
1308 mos7840_block_until_chase_response(tty
, mos7840_port
);
1310 if (break_state
== -1)
1311 data
= mos7840_port
->shadowLCR
| LCR_SET_BREAK
;
1313 data
= mos7840_port
->shadowLCR
& ~LCR_SET_BREAK
;
1315 /* FIXME: no locking on shadowLCR anywhere in driver */
1316 mos7840_port
->shadowLCR
= data
;
1317 dbg("mcs7840_break mos7840_port->shadowLCR is %x",
1318 mos7840_port
->shadowLCR
);
1319 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
,
1320 mos7840_port
->shadowLCR
);
1325 /*****************************************************************************
1326 * mos7840_write_room
1327 * this function is called by the tty driver when it wants to know how many
1328 * bytes of data we can accept for a specific port.
1329 * If successful, we return the amount of room that we have for this port
1330 * Otherwise we return a negative error number.
1331 *****************************************************************************/
1333 static int mos7840_write_room(struct tty_struct
*tty
)
1335 struct usb_serial_port
*port
= tty
->driver_data
;
1338 unsigned long flags
;
1339 struct moschip_port
*mos7840_port
;
1341 dbg("%s", " mos7840_write_room:entering ...........");
1343 if (mos7840_port_paranoia_check(port
, __func__
)) {
1344 dbg("%s", "Invalid port");
1345 dbg("%s", " mos7840_write_room:leaving ...........");
1349 mos7840_port
= mos7840_get_port_private(port
);
1350 if (mos7840_port
== NULL
) {
1351 dbg("%s", "mos7840_break:leaving ...........");
1355 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1356 for (i
= 0; i
< NUM_URBS
; ++i
) {
1357 if (!mos7840_port
->busy
[i
])
1358 room
+= URB_TRANSFER_BUFFER_SIZE
;
1360 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1362 room
= (room
== 0) ? 0 : room
- URB_TRANSFER_BUFFER_SIZE
+ 1;
1363 dbg("%s - returns %d", __func__
, room
);
1368 /*****************************************************************************
1370 * this function is called by the tty driver when data should be written to
1372 * If successful, we return the number of bytes written, otherwise we
1373 * return a negative error number.
1374 *****************************************************************************/
1376 static int mos7840_write(struct tty_struct
*tty
, struct usb_serial_port
*port
,
1377 const unsigned char *data
, int count
)
1383 unsigned long flags
;
1385 struct moschip_port
*mos7840_port
;
1386 struct usb_serial
*serial
;
1389 const unsigned char *current_position
= data
;
1390 unsigned char *data1
;
1391 dbg("%s", "entering ...........");
1392 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1393 mos7840_port->shadowLCR); */
1397 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
1398 mos7840_port
->shadowLCR
= Data
;
1399 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data
);
1400 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1401 mos7840_port
->shadowLCR
);
1404 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1405 /* mos7840_port->shadowLCR=Data;//Need to add later */
1407 Data
|= SERIAL_LCR_DLAB
; /* data latch enable in LCR 0x80 */
1408 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1411 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1413 status
= mos7840_get_uart_reg(port
, DIVISOR_LATCH_LSB
, &Data
);
1414 dbg("mos7840_write:DLL value is %x", Data
);
1417 status
= mos7840_get_uart_reg(port
, DIVISOR_LATCH_MSB
, &Data
);
1418 dbg("mos7840_write:DLM value is %x", Data
);
1420 Data
= Data
& ~SERIAL_LCR_DLAB
;
1421 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1422 mos7840_port
->shadowLCR
);
1423 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1426 if (mos7840_port_paranoia_check(port
, __func__
)) {
1427 dbg("%s", "Port Paranoia failed");
1431 serial
= port
->serial
;
1432 if (mos7840_serial_paranoia_check(serial
, __func__
)) {
1433 dbg("%s", "Serial Paranoia failed");
1437 mos7840_port
= mos7840_get_port_private(port
);
1438 if (mos7840_port
== NULL
) {
1439 dbg("%s", "mos7840_port is NULL");
1443 /* try to find a free urb in the list */
1446 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1447 for (i
= 0; i
< NUM_URBS
; ++i
) {
1448 if (!mos7840_port
->busy
[i
]) {
1449 mos7840_port
->busy
[i
] = 1;
1450 urb
= mos7840_port
->write_urb_pool
[i
];
1455 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1458 dbg("%s - no more free urbs", __func__
);
1462 if (urb
->transfer_buffer
== NULL
) {
1463 urb
->transfer_buffer
=
1464 kmalloc(URB_TRANSFER_BUFFER_SIZE
, GFP_KERNEL
);
1466 if (urb
->transfer_buffer
== NULL
) {
1467 dev_err(&port
->dev
, "%s no more kernel memory...\n",
1472 transfer_size
= min(count
, URB_TRANSFER_BUFFER_SIZE
);
1474 memcpy(urb
->transfer_buffer
, current_position
, transfer_size
);
1476 /* fill urb with data and submit */
1477 usb_fill_bulk_urb(urb
,
1479 usb_sndbulkpipe(serial
->dev
,
1480 port
->bulk_out_endpointAddress
),
1481 urb
->transfer_buffer
,
1483 mos7840_bulk_out_data_callback
, mos7840_port
);
1485 data1
= urb
->transfer_buffer
;
1486 dbg("bulkout endpoint is %d", port
->bulk_out_endpointAddress
);
1488 /* send it down the pipe */
1489 status
= usb_submit_urb(urb
, GFP_ATOMIC
);
1492 mos7840_port
->busy
[i
] = 0;
1493 dev_err(&port
->dev
, "%s - usb_submit_urb(write bulk) failed "
1494 "with status = %d\n", __func__
, status
);
1495 bytes_sent
= status
;
1498 bytes_sent
= transfer_size
;
1499 mos7840_port
->icount
.tx
+= transfer_size
;
1501 dbg("mos7840_port->icount.tx is %d:", mos7840_port
->icount
.tx
);
1507 /*****************************************************************************
1509 * this function is called by the tty driver when it wants to stop the data
1510 * being read from the port.
1511 *****************************************************************************/
1513 static void mos7840_throttle(struct tty_struct
*tty
)
1515 struct usb_serial_port
*port
= tty
->driver_data
;
1516 struct moschip_port
*mos7840_port
;
1519 if (mos7840_port_paranoia_check(port
, __func__
)) {
1520 dbg("%s", "Invalid port");
1524 dbg("- port %d", port
->number
);
1526 mos7840_port
= mos7840_get_port_private(port
);
1528 if (mos7840_port
== NULL
)
1531 if (!mos7840_port
->open
) {
1532 dbg("%s", "port not opened");
1536 dbg("%s", "Entering ..........");
1538 /* if we are implementing XON/XOFF, send the stop character */
1540 unsigned char stop_char
= STOP_CHAR(tty
);
1541 status
= mos7840_write(tty
, port
, &stop_char
, 1);
1545 /* if we are implementing RTS/CTS, toggle that line */
1546 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1547 mos7840_port
->shadowMCR
&= ~MCR_RTS
;
1548 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1549 mos7840_port
->shadowMCR
);
1557 /*****************************************************************************
1558 * mos7840_unthrottle
1559 * this function is called by the tty driver when it wants to resume
1560 * the data being read from the port (called after mos7840_throttle is
1562 *****************************************************************************/
1563 static void mos7840_unthrottle(struct tty_struct
*tty
)
1565 struct usb_serial_port
*port
= tty
->driver_data
;
1567 struct moschip_port
*mos7840_port
= mos7840_get_port_private(port
);
1569 if (mos7840_port_paranoia_check(port
, __func__
)) {
1570 dbg("%s", "Invalid port");
1574 if (mos7840_port
== NULL
)
1577 if (!mos7840_port
->open
) {
1578 dbg("%s - port not opened", __func__
);
1582 dbg("%s", "Entering ..........");
1584 /* if we are implementing XON/XOFF, send the start character */
1586 unsigned char start_char
= START_CHAR(tty
);
1587 status
= mos7840_write(tty
, port
, &start_char
, 1);
1592 /* if we are implementing RTS/CTS, toggle that line */
1593 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1594 mos7840_port
->shadowMCR
|= MCR_RTS
;
1595 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1596 mos7840_port
->shadowMCR
);
1602 static int mos7840_tiocmget(struct tty_struct
*tty
, struct file
*file
)
1604 struct usb_serial_port
*port
= tty
->driver_data
;
1605 struct moschip_port
*mos7840_port
;
1606 unsigned int result
;
1610 mos7840_port
= mos7840_get_port_private(port
);
1612 dbg("%s - port %d", __func__
, port
->number
);
1614 if (mos7840_port
== NULL
)
1617 status
= mos7840_get_uart_reg(port
, MODEM_STATUS_REGISTER
, &msr
);
1618 status
= mos7840_get_uart_reg(port
, MODEM_CONTROL_REGISTER
, &mcr
);
1619 result
= ((mcr
& MCR_DTR
) ? TIOCM_DTR
: 0)
1620 | ((mcr
& MCR_RTS
) ? TIOCM_RTS
: 0)
1621 | ((mcr
& MCR_LOOPBACK
) ? TIOCM_LOOP
: 0)
1622 | ((msr
& MOS7840_MSR_CTS
) ? TIOCM_CTS
: 0)
1623 | ((msr
& MOS7840_MSR_CD
) ? TIOCM_CAR
: 0)
1624 | ((msr
& MOS7840_MSR_RI
) ? TIOCM_RI
: 0)
1625 | ((msr
& MOS7840_MSR_DSR
) ? TIOCM_DSR
: 0);
1627 dbg("%s - 0x%04X", __func__
, result
);
1632 static int mos7840_tiocmset(struct tty_struct
*tty
, struct file
*file
,
1633 unsigned int set
, unsigned int clear
)
1635 struct usb_serial_port
*port
= tty
->driver_data
;
1636 struct moschip_port
*mos7840_port
;
1640 dbg("%s - port %d", __func__
, port
->number
);
1642 mos7840_port
= mos7840_get_port_private(port
);
1644 if (mos7840_port
== NULL
)
1647 /* FIXME: What locks the port registers ? */
1648 mcr
= mos7840_port
->shadowMCR
;
1649 if (clear
& TIOCM_RTS
)
1651 if (clear
& TIOCM_DTR
)
1653 if (clear
& TIOCM_LOOP
)
1654 mcr
&= ~MCR_LOOPBACK
;
1656 if (set
& TIOCM_RTS
)
1658 if (set
& TIOCM_DTR
)
1660 if (set
& TIOCM_LOOP
)
1661 mcr
|= MCR_LOOPBACK
;
1663 mos7840_port
->shadowMCR
= mcr
;
1665 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, mcr
);
1667 dbg("setting MODEM_CONTROL_REGISTER Failed");
1674 /*****************************************************************************
1675 * mos7840_calc_baud_rate_divisor
1676 * this function calculates the proper baud rate divisor for the specified
1678 *****************************************************************************/
1679 static int mos7840_calc_baud_rate_divisor(int baudRate
, int *divisor
,
1683 dbg("%s - %d", __func__
, baudRate
);
1685 if (baudRate
<= 115200) {
1686 *divisor
= 115200 / baudRate
;
1689 if ((baudRate
> 115200) && (baudRate
<= 230400)) {
1690 *divisor
= 230400 / baudRate
;
1691 *clk_sel_val
= 0x10;
1692 } else if ((baudRate
> 230400) && (baudRate
<= 403200)) {
1693 *divisor
= 403200 / baudRate
;
1694 *clk_sel_val
= 0x20;
1695 } else if ((baudRate
> 403200) && (baudRate
<= 460800)) {
1696 *divisor
= 460800 / baudRate
;
1697 *clk_sel_val
= 0x30;
1698 } else if ((baudRate
> 460800) && (baudRate
<= 806400)) {
1699 *divisor
= 806400 / baudRate
;
1700 *clk_sel_val
= 0x40;
1701 } else if ((baudRate
> 806400) && (baudRate
<= 921600)) {
1702 *divisor
= 921600 / baudRate
;
1703 *clk_sel_val
= 0x50;
1704 } else if ((baudRate
> 921600) && (baudRate
<= 1572864)) {
1705 *divisor
= 1572864 / baudRate
;
1706 *clk_sel_val
= 0x60;
1707 } else if ((baudRate
> 1572864) && (baudRate
<= 3145728)) {
1708 *divisor
= 3145728 / baudRate
;
1709 *clk_sel_val
= 0x70;
1715 for (i
= 0; i
< ARRAY_SIZE(mos7840_divisor_table
); i
++) {
1716 if (mos7840_divisor_table
[i
].BaudRate
== baudrate
) {
1717 *divisor
= mos7840_divisor_table
[i
].Divisor
;
1722 /* After trying for all the standard baud rates *
1723 * Try calculating the divisor for this baud rate */
1725 if (baudrate
> 75 && baudrate
< 230400) {
1726 /* get the divisor */
1727 custom
= (__u16
) (230400L / baudrate
);
1729 /* Check for round off */
1730 round1
= (__u16
) (2304000L / baudrate
);
1731 round
= (__u16
) (round1
- (custom
* 10));
1736 dbg(" Baud %d = %d", baudrate
, custom
);
1740 dbg("%s", " Baud calculation Failed...");
1745 /*****************************************************************************
1746 * mos7840_send_cmd_write_baud_rate
1747 * this function sends the proper command to change the baud rate of the
1749 *****************************************************************************/
1751 static int mos7840_send_cmd_write_baud_rate(struct moschip_port
*mos7840_port
,
1757 unsigned char number
;
1759 struct usb_serial_port
*port
;
1761 if (mos7840_port
== NULL
)
1764 port
= (struct usb_serial_port
*)mos7840_port
->port
;
1765 if (mos7840_port_paranoia_check(port
, __func__
)) {
1766 dbg("%s", "Invalid port");
1770 if (mos7840_serial_paranoia_check(port
->serial
, __func__
)) {
1771 dbg("%s", "Invalid Serial");
1775 dbg("%s", "Entering ..........");
1777 number
= mos7840_port
->port
->number
- mos7840_port
->port
->serial
->minor
;
1779 dbg("%s - port = %d, baud = %d", __func__
,
1780 mos7840_port
->port
->number
, baudRate
);
1781 /* reset clk_uart_sel in spregOffset */
1782 if (baudRate
> 115200) {
1783 #ifdef HW_flow_control
1784 /* NOTE: need to see the pther register to modify */
1785 /* setting h/w flow control bit to 1 */
1787 mos7840_port
->shadowMCR
= Data
;
1788 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1791 dbg("Writing spreg failed in set_serial_baud");
1797 #ifdef HW_flow_control
1798 / *setting h
/w flow control bit to
0 */
1800 mos7840_port
->shadowMCR
= Data
;
1801 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1804 dbg("Writing spreg failed in set_serial_baud");
1811 if (1) { /* baudRate <= 115200) */
1814 status
= mos7840_calc_baud_rate_divisor(baudRate
, &divisor
,
1816 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
,
1819 dbg("reading spreg failed in set_serial_baud");
1822 Data
= (Data
& 0x8f) | clk_sel_val
;
1823 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
,
1826 dbg("Writing spreg failed in set_serial_baud");
1829 /* Calculate the Divisor */
1832 dev_err(&port
->dev
, "%s - bad baud rate\n", __func__
);
1835 /* Enable access to divisor latch */
1836 Data
= mos7840_port
->shadowLCR
| SERIAL_LCR_DLAB
;
1837 mos7840_port
->shadowLCR
= Data
;
1838 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1840 /* Write the divisor */
1841 Data
= (unsigned char)(divisor
& 0xff);
1842 dbg("set_serial_baud Value to write DLL is %x", Data
);
1843 mos7840_set_uart_reg(port
, DIVISOR_LATCH_LSB
, Data
);
1845 Data
= (unsigned char)((divisor
& 0xff00) >> 8);
1846 dbg("set_serial_baud Value to write DLM is %x", Data
);
1847 mos7840_set_uart_reg(port
, DIVISOR_LATCH_MSB
, Data
);
1849 /* Disable access to divisor latch */
1850 Data
= mos7840_port
->shadowLCR
& ~SERIAL_LCR_DLAB
;
1851 mos7840_port
->shadowLCR
= Data
;
1852 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1858 /*****************************************************************************
1859 * mos7840_change_port_settings
1860 * This routine is called to set the UART on the device to match
1861 * the specified new settings.
1862 *****************************************************************************/
1864 static void mos7840_change_port_settings(struct tty_struct
*tty
,
1865 struct moschip_port
*mos7840_port
, struct ktermios
*old_termios
)
1875 struct usb_serial_port
*port
;
1876 struct usb_serial
*serial
;
1878 if (mos7840_port
== NULL
)
1881 port
= (struct usb_serial_port
*)mos7840_port
->port
;
1883 if (mos7840_port_paranoia_check(port
, __func__
)) {
1884 dbg("%s", "Invalid port");
1888 if (mos7840_serial_paranoia_check(port
->serial
, __func__
)) {
1889 dbg("%s", "Invalid Serial");
1893 serial
= port
->serial
;
1895 dbg("%s - port %d", __func__
, mos7840_port
->port
->number
);
1897 if (!mos7840_port
->open
) {
1898 dbg("%s - port not opened", __func__
);
1902 dbg("%s", "Entering ..........");
1906 lParity
= LCR_PAR_NONE
;
1908 cflag
= tty
->termios
->c_cflag
;
1909 iflag
= tty
->termios
->c_iflag
;
1911 /* Change the number of bits */
1912 if (cflag
& CSIZE
) {
1913 switch (cflag
& CSIZE
) {
1931 /* Change the Parity bit */
1932 if (cflag
& PARENB
) {
1933 if (cflag
& PARODD
) {
1934 lParity
= LCR_PAR_ODD
;
1935 dbg("%s - parity = odd", __func__
);
1937 lParity
= LCR_PAR_EVEN
;
1938 dbg("%s - parity = even", __func__
);
1942 dbg("%s - parity = none", __func__
);
1946 lParity
= lParity
| 0x20;
1948 /* Change the Stop bit */
1949 if (cflag
& CSTOPB
) {
1951 dbg("%s - stop bits = 2", __func__
);
1954 dbg("%s - stop bits = 1", __func__
);
1957 /* Update the LCR with the correct value */
1958 mos7840_port
->shadowLCR
&=
1959 ~(LCR_BITS_MASK
| LCR_STOP_MASK
| LCR_PAR_MASK
);
1960 mos7840_port
->shadowLCR
|= (lData
| lParity
| lStop
);
1962 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x",
1963 mos7840_port
->shadowLCR
);
1964 /* Disable Interrupts */
1966 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
1969 mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
1972 mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
1974 /* Send the updated LCR value to the mos7840 */
1975 Data
= mos7840_port
->shadowLCR
;
1977 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1980 mos7840_port
->shadowMCR
= Data
;
1981 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
1983 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
1985 /* set up the MCR register and send it to the mos7840 */
1987 mos7840_port
->shadowMCR
= MCR_MASTER_IE
;
1989 mos7840_port
->shadowMCR
|= (MCR_DTR
| MCR_RTS
);
1991 if (cflag
& CRTSCTS
)
1992 mos7840_port
->shadowMCR
|= (MCR_XON_ANY
);
1994 mos7840_port
->shadowMCR
&= ~(MCR_XON_ANY
);
1996 Data
= mos7840_port
->shadowMCR
;
1997 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
1999 /* Determine divisor based on baud rate */
2000 baud
= tty_get_baud_rate(tty
);
2003 /* pick a default, any default... */
2004 dbg("%s", "Picked default baud...");
2008 dbg("%s - baud rate = %d", __func__
, baud
);
2009 status
= mos7840_send_cmd_write_baud_rate(mos7840_port
, baud
);
2011 /* Enable Interrupts */
2013 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
2015 if (mos7840_port
->read_urb_busy
== false) {
2016 mos7840_port
->read_urb
->dev
= serial
->dev
;
2017 mos7840_port
->read_urb_busy
= true;
2018 status
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
2020 dbg("usb_submit_urb(read bulk) failed, status = %d",
2022 mos7840_port
->read_urb_busy
= false;
2025 wake_up(&mos7840_port
->delta_msr_wait
);
2026 mos7840_port
->delta_msr_cond
= 1;
2027 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x",
2028 mos7840_port
->shadowLCR
);
2033 /*****************************************************************************
2034 * mos7840_set_termios
2035 * this function is called by the tty driver when it wants to change
2036 * the termios structure
2037 *****************************************************************************/
2039 static void mos7840_set_termios(struct tty_struct
*tty
,
2040 struct usb_serial_port
*port
,
2041 struct ktermios
*old_termios
)
2045 struct usb_serial
*serial
;
2046 struct moschip_port
*mos7840_port
;
2047 dbg("mos7840_set_termios: START");
2048 if (mos7840_port_paranoia_check(port
, __func__
)) {
2049 dbg("%s", "Invalid port");
2053 serial
= port
->serial
;
2055 if (mos7840_serial_paranoia_check(serial
, __func__
)) {
2056 dbg("%s", "Invalid Serial");
2060 mos7840_port
= mos7840_get_port_private(port
);
2062 if (mos7840_port
== NULL
)
2065 if (!mos7840_port
->open
) {
2066 dbg("%s - port not opened", __func__
);
2070 dbg("%s", "setting termios - ");
2072 cflag
= tty
->termios
->c_cflag
;
2074 dbg("%s - clfag %08x iflag %08x", __func__
,
2075 tty
->termios
->c_cflag
, RELEVANT_IFLAG(tty
->termios
->c_iflag
));
2076 dbg("%s - old clfag %08x old iflag %08x", __func__
,
2077 old_termios
->c_cflag
, RELEVANT_IFLAG(old_termios
->c_iflag
));
2078 dbg("%s - port %d", __func__
, port
->number
);
2080 /* change the port settings to the new ones specified */
2082 mos7840_change_port_settings(tty
, mos7840_port
, old_termios
);
2084 if (!mos7840_port
->read_urb
) {
2085 dbg("%s", "URB KILLED !!!!!");
2089 if (mos7840_port
->read_urb_busy
== false) {
2090 mos7840_port
->read_urb
->dev
= serial
->dev
;
2091 mos7840_port
->read_urb_busy
= true;
2092 status
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
2094 dbg("usb_submit_urb(read bulk) failed, status = %d",
2096 mos7840_port
->read_urb_busy
= false;
2102 /*****************************************************************************
2103 * mos7840_get_lsr_info - get line status register info
2105 * Purpose: Let user call ioctl() to get info when the UART physically
2106 * is emptied. On bus types like RS485, the transmitter must
2107 * release the bus after transmitting. This must be done when
2108 * the transmit shift register is empty, not be done when the
2109 * transmit holding register is empty. This functionality
2110 * allows an RS485 driver to be written in user space.
2111 *****************************************************************************/
2113 static int mos7840_get_lsr_info(struct tty_struct
*tty
,
2114 unsigned int __user
*value
)
2117 unsigned int result
= 0;
2119 count
= mos7840_chars_in_buffer(tty
);
2121 dbg("%s -- Empty", __func__
);
2122 result
= TIOCSER_TEMT
;
2125 if (copy_to_user(value
, &result
, sizeof(int)))
2130 /*****************************************************************************
2131 * mos7840_set_modem_info
2132 * function to set modem info
2133 *****************************************************************************/
2135 /* FIXME: Should be using the model control hooks */
2137 static int mos7840_set_modem_info(struct moschip_port
*mos7840_port
,
2138 unsigned int cmd
, unsigned int __user
*value
)
2144 struct usb_serial_port
*port
;
2146 if (mos7840_port
== NULL
)
2149 port
= (struct usb_serial_port
*)mos7840_port
->port
;
2150 if (mos7840_port_paranoia_check(port
, __func__
)) {
2151 dbg("%s", "Invalid port");
2155 mcr
= mos7840_port
->shadowMCR
;
2157 if (copy_from_user(&arg
, value
, sizeof(int)))
2162 if (arg
& TIOCM_RTS
)
2164 if (arg
& TIOCM_DTR
)
2166 if (arg
& TIOCM_LOOP
)
2167 mcr
|= MCR_LOOPBACK
;
2171 if (arg
& TIOCM_RTS
)
2173 if (arg
& TIOCM_DTR
)
2175 if (arg
& TIOCM_LOOP
)
2176 mcr
&= ~MCR_LOOPBACK
;
2180 /* turn off the RTS and DTR and LOOPBACK
2181 * and then only turn on what was asked to */
2182 mcr
&= ~(MCR_RTS
| MCR_DTR
| MCR_LOOPBACK
);
2183 mcr
|= ((arg
& TIOCM_RTS
) ? MCR_RTS
: 0);
2184 mcr
|= ((arg
& TIOCM_DTR
) ? MCR_DTR
: 0);
2185 mcr
|= ((arg
& TIOCM_LOOP
) ? MCR_LOOPBACK
: 0);
2190 mos7840_port
->shadowMCR
= mcr
;
2192 Data
= mos7840_port
->shadowMCR
;
2193 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2196 dbg("setting MODEM_CONTROL_REGISTER Failed");
2203 /*****************************************************************************
2204 * mos7840_get_modem_info
2205 * function to get modem info
2206 *****************************************************************************/
2208 static int mos7840_get_modem_info(struct moschip_port
*mos7840_port
,
2209 unsigned int __user
*value
)
2211 unsigned int result
= 0;
2213 unsigned int mcr
= mos7840_port
->shadowMCR
;
2214 mos7840_get_uart_reg(mos7840_port
->port
,
2215 MODEM_STATUS_REGISTER
, &msr
);
2216 result
= ((mcr
& MCR_DTR
) ? TIOCM_DTR
: 0) /* 0x002 */
2217 |((mcr
& MCR_RTS
) ? TIOCM_RTS
: 0) /* 0x004 */
2218 |((msr
& MOS7840_MSR_CTS
) ? TIOCM_CTS
: 0) /* 0x020 */
2219 |((msr
& MOS7840_MSR_CD
) ? TIOCM_CAR
: 0) /* 0x040 */
2220 |((msr
& MOS7840_MSR_RI
) ? TIOCM_RI
: 0) /* 0x080 */
2221 |((msr
& MOS7840_MSR_DSR
) ? TIOCM_DSR
: 0); /* 0x100 */
2223 dbg("%s -- %x", __func__
, result
);
2225 if (copy_to_user(value
, &result
, sizeof(int)))
2230 /*****************************************************************************
2231 * mos7840_get_serial_info
2232 * function to get information about serial port
2233 *****************************************************************************/
2235 static int mos7840_get_serial_info(struct moschip_port
*mos7840_port
,
2236 struct serial_struct __user
*retinfo
)
2238 struct serial_struct tmp
;
2240 if (mos7840_port
== NULL
)
2246 memset(&tmp
, 0, sizeof(tmp
));
2248 tmp
.type
= PORT_16550A
;
2249 tmp
.line
= mos7840_port
->port
->serial
->minor
;
2250 tmp
.port
= mos7840_port
->port
->number
;
2252 tmp
.flags
= ASYNC_SKIP_TEST
| ASYNC_AUTO_IRQ
;
2253 tmp
.xmit_fifo_size
= NUM_URBS
* URB_TRANSFER_BUFFER_SIZE
;
2254 tmp
.baud_base
= 9600;
2255 tmp
.close_delay
= 5 * HZ
;
2256 tmp
.closing_wait
= 30 * HZ
;
2258 if (copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)))
2263 /*****************************************************************************
2265 * this function handles any ioctl calls to the driver
2266 *****************************************************************************/
2268 static int mos7840_ioctl(struct tty_struct
*tty
, struct file
*file
,
2269 unsigned int cmd
, unsigned long arg
)
2271 struct usb_serial_port
*port
= tty
->driver_data
;
2272 void __user
*argp
= (void __user
*)arg
;
2273 struct moschip_port
*mos7840_port
;
2275 struct async_icount cnow
;
2276 struct async_icount cprev
;
2277 struct serial_icounter_struct icount
;
2280 if (mos7840_port_paranoia_check(port
, __func__
)) {
2281 dbg("%s", "Invalid port");
2285 mos7840_port
= mos7840_get_port_private(port
);
2287 if (mos7840_port
== NULL
)
2290 dbg("%s - port %d, cmd = 0x%x", __func__
, port
->number
, cmd
);
2293 /* return number of bytes available */
2296 dbg("%s (%d) TIOCSERGETLSR", __func__
, port
->number
);
2297 return mos7840_get_lsr_info(tty
, argp
);
2300 /* FIXME: use the modem hooks and remove this */
2304 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __func__
,
2307 mos7840_set_modem_info(mos7840_port
, cmd
, argp
);
2311 dbg("%s (%d) TIOCMGET", __func__
, port
->number
);
2312 return mos7840_get_modem_info(mos7840_port
, argp
);
2315 dbg("%s (%d) TIOCGSERIAL", __func__
, port
->number
);
2316 return mos7840_get_serial_info(mos7840_port
, argp
);
2319 dbg("%s (%d) TIOCSSERIAL", __func__
, port
->number
);
2323 dbg("%s (%d) TIOCMIWAIT", __func__
, port
->number
);
2324 cprev
= mos7840_port
->icount
;
2326 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2327 mos7840_port
->delta_msr_cond
= 0;
2328 wait_event_interruptible(mos7840_port
->delta_msr_wait
,
2330 delta_msr_cond
== 1));
2332 /* see if a signal did it */
2333 if (signal_pending(current
))
2334 return -ERESTARTSYS
;
2335 cnow
= mos7840_port
->icount
;
2337 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
2338 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
)
2339 return -EIO
; /* no change => error */
2340 if (((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
.rng
)) ||
2341 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
.dsr
)) ||
2342 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
.dcd
)) ||
2343 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
.cts
))) {
2352 cnow
= mos7840_port
->icount
;
2354 icount
.cts
= cnow
.cts
;
2355 icount
.dsr
= cnow
.dsr
;
2356 icount
.rng
= cnow
.rng
;
2357 icount
.dcd
= cnow
.dcd
;
2358 icount
.rx
= cnow
.rx
;
2359 icount
.tx
= cnow
.tx
;
2360 icount
.frame
= cnow
.frame
;
2361 icount
.overrun
= cnow
.overrun
;
2362 icount
.parity
= cnow
.parity
;
2363 icount
.brk
= cnow
.brk
;
2364 icount
.buf_overrun
= cnow
.buf_overrun
;
2366 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__
,
2367 port
->number
, icount
.rx
, icount
.tx
);
2368 if (copy_to_user(argp
, &icount
, sizeof(icount
)))
2374 return -ENOIOCTLCMD
;
2377 static int mos7840_calc_num_ports(struct usb_serial
*serial
)
2379 int mos7840_num_ports
= 0;
2381 dbg("numberofendpoints: cur %d, alt %d",
2382 (int)serial
->interface
->cur_altsetting
->desc
.bNumEndpoints
,
2383 (int)serial
->interface
->altsetting
->desc
.bNumEndpoints
);
2384 if (serial
->interface
->cur_altsetting
->desc
.bNumEndpoints
== 5) {
2385 mos7840_num_ports
= serial
->num_ports
= 2;
2386 } else if (serial
->interface
->cur_altsetting
->desc
.bNumEndpoints
== 9) {
2387 serial
->num_bulk_in
= 4;
2388 serial
->num_bulk_out
= 4;
2389 mos7840_num_ports
= serial
->num_ports
= 4;
2391 dbg ("mos7840_num_ports = %d", mos7840_num_ports
);
2392 return mos7840_num_ports
;
2395 /****************************************************************************
2397 ****************************************************************************/
2399 static int mos7840_startup(struct usb_serial
*serial
)
2401 struct moschip_port
*mos7840_port
;
2402 struct usb_device
*dev
;
2406 dbg("%s", "mos7840_startup :Entering..........");
2409 dbg("%s", "Invalid Handler");
2415 dbg("%s", "Entering...");
2416 dbg ("mos7840_startup: serial = %p", serial
);
2418 /* we set up the pointers to the endpoints in the mos7840_open *
2419 * function, as the structures aren't created yet. */
2421 /* set up port private structures */
2422 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2423 dbg ("mos7840_startup: configuring port %d............", i
);
2424 mos7840_port
= kzalloc(sizeof(struct moschip_port
), GFP_KERNEL
);
2425 if (mos7840_port
== NULL
) {
2426 dev_err(&dev
->dev
, "%s - Out of memory\n", __func__
);
2428 i
--; /* don't follow NULL pointer cleaning up */
2432 /* Initialize all port interrupt end point to port 0 int
2433 * endpoint. Our device has only one interrupt end point
2434 * common to all port */
2436 mos7840_port
->port
= serial
->port
[i
];
2437 mos7840_set_port_private(serial
->port
[i
], mos7840_port
);
2438 spin_lock_init(&mos7840_port
->pool_lock
);
2440 /* minor is not initialised until later by
2441 * usb-serial.c:get_free_serial() and cannot therefore be used
2442 * to index device instances */
2443 mos7840_port
->port_num
= i
+ 1;
2444 dbg ("serial->port[i]->number = %d", serial
->port
[i
]->number
);
2445 dbg ("serial->port[i]->serial->minor = %d", serial
->port
[i
]->serial
->minor
);
2446 dbg ("mos7840_port->port_num = %d", mos7840_port
->port_num
);
2447 dbg ("serial->minor = %d", serial
->minor
);
2449 if (mos7840_port
->port_num
== 1) {
2450 mos7840_port
->SpRegOffset
= 0x0;
2451 mos7840_port
->ControlRegOffset
= 0x1;
2452 mos7840_port
->DcrRegOffset
= 0x4;
2453 } else if ((mos7840_port
->port_num
== 2)
2454 && (serial
->num_ports
== 4)) {
2455 mos7840_port
->SpRegOffset
= 0x8;
2456 mos7840_port
->ControlRegOffset
= 0x9;
2457 mos7840_port
->DcrRegOffset
= 0x16;
2458 } else if ((mos7840_port
->port_num
== 2)
2459 && (serial
->num_ports
== 2)) {
2460 mos7840_port
->SpRegOffset
= 0xa;
2461 mos7840_port
->ControlRegOffset
= 0xb;
2462 mos7840_port
->DcrRegOffset
= 0x19;
2463 } else if ((mos7840_port
->port_num
== 3)
2464 && (serial
->num_ports
== 4)) {
2465 mos7840_port
->SpRegOffset
= 0xa;
2466 mos7840_port
->ControlRegOffset
= 0xb;
2467 mos7840_port
->DcrRegOffset
= 0x19;
2468 } else if ((mos7840_port
->port_num
== 4)
2469 && (serial
->num_ports
== 4)) {
2470 mos7840_port
->SpRegOffset
= 0xc;
2471 mos7840_port
->ControlRegOffset
= 0xd;
2472 mos7840_port
->DcrRegOffset
= 0x1c;
2474 mos7840_dump_serial_port(mos7840_port
);
2475 mos7840_set_port_private(serial
->port
[i
], mos7840_port
);
2477 /* enable rx_disable bit in control register */
2478 status
= mos7840_get_reg_sync(serial
->port
[i
],
2479 mos7840_port
->ControlRegOffset
, &Data
);
2481 dbg("Reading ControlReg failed status-0x%x", status
);
2484 dbg("ControlReg Reading success val is %x, status%d",
2486 Data
|= 0x08; /* setting driver done bit */
2487 Data
|= 0x04; /* sp1_bit to have cts change reflect in
2490 /* Data |= 0x20; //rx_disable bit */
2491 status
= mos7840_set_reg_sync(serial
->port
[i
],
2492 mos7840_port
->ControlRegOffset
, Data
);
2494 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status
);
2497 dbg("ControlReg Writing success(rx_disable) status%d",
2500 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2503 status
= mos7840_set_reg_sync(serial
->port
[i
],
2504 (__u16
) (mos7840_port
->DcrRegOffset
+ 0), Data
);
2506 dbg("Writing DCR0 failed status-0x%x", status
);
2509 dbg("DCR0 Writing success status%d", status
);
2512 status
= mos7840_set_reg_sync(serial
->port
[i
],
2513 (__u16
) (mos7840_port
->DcrRegOffset
+ 1), Data
);
2515 dbg("Writing DCR1 failed status-0x%x", status
);
2518 dbg("DCR1 Writing success status%d", status
);
2521 status
= mos7840_set_reg_sync(serial
->port
[i
],
2522 (__u16
) (mos7840_port
->DcrRegOffset
+ 2), Data
);
2524 dbg("Writing DCR2 failed status-0x%x", status
);
2527 dbg("DCR2 Writing success status%d", status
);
2529 /* write values in clkstart0x0 and clkmulti 0x20 */
2531 status
= mos7840_set_reg_sync(serial
->port
[i
],
2532 CLK_START_VALUE_REGISTER
, Data
);
2534 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status
);
2537 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status
);
2540 status
= mos7840_set_reg_sync(serial
->port
[i
],
2541 CLK_MULTI_REGISTER
, Data
);
2543 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x",
2547 dbg("CLK_MULTI_REGISTER Writing success status%d",
2550 /* write value 0x0 to scratchpad register */
2552 status
= mos7840_set_uart_reg(serial
->port
[i
],
2553 SCRATCH_PAD_REGISTER
, Data
);
2555 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x",
2559 dbg("SCRATCH_PAD_REGISTER Writing success status%d",
2562 /* Zero Length flag register */
2563 if ((mos7840_port
->port_num
!= 1)
2564 && (serial
->num_ports
== 2)) {
2567 status
= mos7840_set_reg_sync(serial
->port
[i
],
2569 ((__u16
)mos7840_port
->port_num
)), Data
);
2570 dbg("ZLIP offset %x",
2572 ((__u16
) mos7840_port
->port_num
)));
2574 dbg("Writing ZLP_REG%d failed status-0x%x",
2578 dbg("ZLP_REG%d Writing success status%d",
2582 status
= mos7840_set_reg_sync(serial
->port
[i
],
2584 ((__u16
)mos7840_port
->port_num
) - 0x1), Data
);
2585 dbg("ZLIP offset %x",
2587 ((__u16
) mos7840_port
->port_num
) - 0x1));
2589 dbg("Writing ZLP_REG%d failed status-0x%x",
2593 dbg("ZLP_REG%d Writing success status%d",
2597 mos7840_port
->control_urb
= usb_alloc_urb(0, GFP_KERNEL
);
2598 mos7840_port
->ctrl_buf
= kmalloc(16, GFP_KERNEL
);
2599 mos7840_port
->dr
= kmalloc(sizeof(struct usb_ctrlrequest
),
2601 if (!mos7840_port
->control_urb
|| !mos7840_port
->ctrl_buf
||
2602 !mos7840_port
->dr
) {
2607 dbg ("mos7840_startup: all ports configured...........");
2609 /* Zero Length flag enable */
2611 status
= mos7840_set_reg_sync(serial
->port
[0], ZLP_REG5
, Data
);
2613 dbg("Writing ZLP_REG5 failed status-0x%x", status
);
2616 dbg("ZLP_REG5 Writing success status%d", status
);
2618 /* setting configuration feature to one */
2619 usb_control_msg(serial
->dev
, usb_sndctrlpipe(serial
->dev
, 0),
2620 (__u8
) 0x03, 0x00, 0x01, 0x00, NULL
, 0x00, 5 * HZ
);
2623 for (/* nothing */; i
>= 0; i
--) {
2624 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
2626 kfree(mos7840_port
->dr
);
2627 kfree(mos7840_port
->ctrl_buf
);
2628 usb_free_urb(mos7840_port
->control_urb
);
2629 kfree(mos7840_port
);
2630 serial
->port
[i
] = NULL
;
2635 /****************************************************************************
2636 * mos7840_disconnect
2637 * This function is called whenever the device is removed from the usb bus.
2638 ****************************************************************************/
2640 static void mos7840_disconnect(struct usb_serial
*serial
)
2643 unsigned long flags
;
2644 struct moschip_port
*mos7840_port
;
2645 dbg("%s", " disconnect :entering..........");
2648 dbg("%s", "Invalid Handler");
2652 /* check for the ports to be closed,close the ports and disconnect */
2654 /* free private structure allocated for serial port *
2655 * stop reads and writes on all ports */
2657 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2658 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
2659 dbg ("mos7840_port %d = %p", i
, mos7840_port
);
2661 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
2662 mos7840_port
->zombie
= 1;
2663 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
2664 usb_kill_urb(mos7840_port
->control_urb
);
2668 dbg("%s", "Thank u :: ");
2672 /****************************************************************************
2674 * This function is called when the usb_serial structure is freed.
2675 ****************************************************************************/
2677 static void mos7840_release(struct usb_serial
*serial
)
2680 struct moschip_port
*mos7840_port
;
2681 dbg("%s", " release :entering..........");
2684 dbg("%s", "Invalid Handler");
2688 /* check for the ports to be closed,close the ports and disconnect */
2690 /* free private structure allocated for serial port *
2691 * stop reads and writes on all ports */
2693 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2694 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
2695 dbg("mos7840_port %d = %p", i
, mos7840_port
);
2697 kfree(mos7840_port
->ctrl_buf
);
2698 kfree(mos7840_port
->dr
);
2699 kfree(mos7840_port
);
2703 dbg("%s", "Thank u :: ");
2707 static struct usb_driver io_driver
= {
2709 .probe
= usb_serial_probe
,
2710 .disconnect
= usb_serial_disconnect
,
2711 .id_table
= moschip_id_table_combined
,
2715 static struct usb_serial_driver moschip7840_4port_device
= {
2717 .owner
= THIS_MODULE
,
2720 .description
= DRIVER_DESC
,
2721 .usb_driver
= &io_driver
,
2722 .id_table
= moschip_port_id_table
,
2724 .open
= mos7840_open
,
2725 .close
= mos7840_close
,
2726 .write
= mos7840_write
,
2727 .write_room
= mos7840_write_room
,
2728 .chars_in_buffer
= mos7840_chars_in_buffer
,
2729 .throttle
= mos7840_throttle
,
2730 .unthrottle
= mos7840_unthrottle
,
2731 .calc_num_ports
= mos7840_calc_num_ports
,
2732 #ifdef MCSSerialProbe
2733 .probe
= mos7840_serial_probe
,
2735 .ioctl
= mos7840_ioctl
,
2736 .set_termios
= mos7840_set_termios
,
2737 .break_ctl
= mos7840_break
,
2738 .tiocmget
= mos7840_tiocmget
,
2739 .tiocmset
= mos7840_tiocmset
,
2740 .attach
= mos7840_startup
,
2741 .disconnect
= mos7840_disconnect
,
2742 .release
= mos7840_release
,
2743 .read_bulk_callback
= mos7840_bulk_in_callback
,
2744 .read_int_callback
= mos7840_interrupt_callback
,
2747 /****************************************************************************
2749 * This is called by the module subsystem, or on startup to initialize us
2750 ****************************************************************************/
2751 static int __init
moschip7840_init(void)
2755 dbg("%s", " mos7840_init :entering..........");
2757 /* Register with the usb serial */
2758 retval
= usb_serial_register(&moschip7840_4port_device
);
2761 goto failed_port_device_register
;
2763 dbg("%s", "Entering...");
2764 printk(KERN_INFO KBUILD_MODNAME
": " DRIVER_VERSION
":"
2767 /* Register with the usb */
2768 retval
= usb_register(&io_driver
);
2770 dbg("%s", "Leaving...");
2773 usb_serial_deregister(&moschip7840_4port_device
);
2774 failed_port_device_register
:
2778 /****************************************************************************
2780 * Called when the driver is about to be unloaded.
2781 ****************************************************************************/
2782 static void __exit
moschip7840_exit(void)
2785 dbg("%s", " mos7840_exit :entering..........");
2787 usb_deregister(&io_driver
);
2789 usb_serial_deregister(&moschip7840_4port_device
);
2791 dbg("%s", "Entering...");
2794 module_init(moschip7840_init
);
2795 module_exit(moschip7840_exit
);
2797 /* Module information */
2798 MODULE_DESCRIPTION(DRIVER_DESC
);
2799 MODULE_LICENSE("GPL");
2801 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
2802 MODULE_PARM_DESC(debug
, "Debug enabled or not");