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_USO9ML2_2 0xAC22
124 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
125 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29
126 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30
127 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31
128 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32
129 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
130 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
131 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
133 /* This driver also supports
134 * ATEN UC2324 device using Moschip MCS7840
135 * ATEN UC2322 device using Moschip MCS7820
137 #define USB_VENDOR_ID_ATENINTL 0x0557
138 #define ATENINTL_DEVICE_ID_UC2324 0x2011
139 #define ATENINTL_DEVICE_ID_UC2322 0x7820
141 /* Interrupt Routine Defines */
143 #define SERIAL_IIR_RLS 0x06
144 #define SERIAL_IIR_MS 0x00
147 * Emulation of the bit mask on the LINE STATUS REGISTER.
149 #define SERIAL_LSR_DR 0x0001
150 #define SERIAL_LSR_OE 0x0002
151 #define SERIAL_LSR_PE 0x0004
152 #define SERIAL_LSR_FE 0x0008
153 #define SERIAL_LSR_BI 0x0010
155 #define MOS_MSR_DELTA_CTS 0x10
156 #define MOS_MSR_DELTA_DSR 0x20
157 #define MOS_MSR_DELTA_RI 0x40
158 #define MOS_MSR_DELTA_CD 0x80
160 /* Serial Port register Address */
161 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
162 #define FIFO_CONTROL_REGISTER ((__u16)(0x02))
163 #define LINE_CONTROL_REGISTER ((__u16)(0x03))
164 #define MODEM_CONTROL_REGISTER ((__u16)(0x04))
165 #define LINE_STATUS_REGISTER ((__u16)(0x05))
166 #define MODEM_STATUS_REGISTER ((__u16)(0x06))
167 #define SCRATCH_PAD_REGISTER ((__u16)(0x07))
168 #define DIVISOR_LATCH_LSB ((__u16)(0x00))
169 #define DIVISOR_LATCH_MSB ((__u16)(0x01))
171 #define CLK_MULTI_REGISTER ((__u16)(0x02))
172 #define CLK_START_VALUE_REGISTER ((__u16)(0x03))
174 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
177 * URB POOL related defines
179 #define NUM_URBS 16 /* URB Count */
180 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
183 static const struct usb_device_id moschip_port_id_table
[] = {
184 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7840
)},
185 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7820
)},
186 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_2
)},
187 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_4
)},
188 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_US9ML2_2
)},
189 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_US9ML2_4
)},
190 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USPTL4_2
)},
191 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USPTL4_4
)},
192 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_2
)},
193 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_4
)},
194 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL2_4
)},
195 {USB_DEVICE(USB_VENDOR_ID_ATENINTL
, ATENINTL_DEVICE_ID_UC2324
)},
196 {USB_DEVICE(USB_VENDOR_ID_ATENINTL
, ATENINTL_DEVICE_ID_UC2322
)},
197 {} /* terminating entry */
200 static const struct usb_device_id moschip_id_table_combined
[] __devinitconst
= {
201 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7840
)},
202 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7820
)},
203 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_2
)},
204 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_4
)},
205 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_US9ML2_2
)},
206 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_US9ML2_4
)},
207 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USPTL4_2
)},
208 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USPTL4_4
)},
209 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_2
)},
210 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_4
)},
211 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL2_4
)},
212 {USB_DEVICE(USB_VENDOR_ID_ATENINTL
, ATENINTL_DEVICE_ID_UC2324
)},
213 {USB_DEVICE(USB_VENDOR_ID_ATENINTL
, ATENINTL_DEVICE_ID_UC2322
)},
214 {} /* terminating entry */
217 MODULE_DEVICE_TABLE(usb
, moschip_id_table_combined
);
219 /* This structure holds all of the local port information */
221 struct moschip_port
{
222 int port_num
; /*Actual port number in the device(1,2,etc) */
223 struct urb
*write_urb
; /* write URB for this port */
224 struct urb
*read_urb
; /* read URB for this port */
226 __u8 shadowLCR
; /* last LCR value received */
227 __u8 shadowMCR
; /* last MCR value received */
231 wait_queue_head_t wait_chase
; /* for handling sleeping while waiting for chase to finish */
232 wait_queue_head_t delta_msr_wait
; /* for handling sleeping while waiting for msr change to happen */
234 struct async_icount icount
;
235 struct usb_serial_port
*port
; /* loop back to the owner of this object */
239 __u8 ControlRegOffset
;
241 /* for processing control URBS in interrupt context */
242 struct urb
*control_urb
;
243 struct usb_ctrlrequest
*dr
;
247 spinlock_t pool_lock
;
248 struct urb
*write_urb_pool
[NUM_URBS
];
257 * mos7840_set_reg_sync
258 * To set the Control register by calling usb_fill_control_urb function
259 * by passing usb_sndctrlpipe function as parameter.
262 static int mos7840_set_reg_sync(struct usb_serial_port
*port
, __u16 reg
,
265 struct usb_device
*dev
= port
->serial
->dev
;
267 dbg("mos7840_set_reg_sync offset is %x, value %x", reg
, val
);
269 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), MCS_WRREQ
,
270 MCS_WR_RTYPE
, val
, reg
, NULL
, 0,
275 * mos7840_get_reg_sync
276 * To set the Uart register by calling usb_fill_control_urb function by
277 * passing usb_rcvctrlpipe function as parameter.
280 static int mos7840_get_reg_sync(struct usb_serial_port
*port
, __u16 reg
,
283 struct usb_device
*dev
= port
->serial
->dev
;
287 buf
= kmalloc(VENDOR_READ_LENGTH
, GFP_KERNEL
);
291 ret
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0), MCS_RDREQ
,
292 MCS_RD_RTYPE
, 0, reg
, buf
, VENDOR_READ_LENGTH
,
295 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg
, *val
);
302 * mos7840_set_uart_reg
303 * To set the Uart register by calling usb_fill_control_urb function by
304 * passing usb_sndctrlpipe function as parameter.
307 static int mos7840_set_uart_reg(struct usb_serial_port
*port
, __u16 reg
,
311 struct usb_device
*dev
= port
->serial
->dev
;
313 /* For the UART control registers, the application number need
315 if (port
->serial
->num_ports
== 4) {
316 val
|= (((__u16
) port
->number
-
317 (__u16
) (port
->serial
->minor
)) + 1) << 8;
318 dbg("mos7840_set_uart_reg application number is %x", val
);
320 if (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) == 0) {
321 val
|= (((__u16
) port
->number
-
322 (__u16
) (port
->serial
->minor
)) + 1) << 8;
323 dbg("mos7840_set_uart_reg application number is %x",
327 (((__u16
) port
->number
-
328 (__u16
) (port
->serial
->minor
)) + 2) << 8;
329 dbg("mos7840_set_uart_reg application number is %x",
333 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), MCS_WRREQ
,
334 MCS_WR_RTYPE
, val
, reg
, NULL
, 0,
340 * mos7840_get_uart_reg
341 * To set the Control register by calling usb_fill_control_urb function
342 * by passing usb_rcvctrlpipe function as parameter.
344 static int mos7840_get_uart_reg(struct usb_serial_port
*port
, __u16 reg
,
347 struct usb_device
*dev
= port
->serial
->dev
;
352 buf
= kmalloc(VENDOR_READ_LENGTH
, GFP_KERNEL
);
356 /* dbg("application number is %4x",
357 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
358 /* Wval is same as application number */
359 if (port
->serial
->num_ports
== 4) {
361 (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) +
363 dbg("mos7840_get_uart_reg application number is %x", Wval
);
365 if (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) == 0) {
366 Wval
= (((__u16
) port
->number
-
367 (__u16
) (port
->serial
->minor
)) + 1) << 8;
368 dbg("mos7840_get_uart_reg application number is %x",
371 Wval
= (((__u16
) port
->number
-
372 (__u16
) (port
->serial
->minor
)) + 2) << 8;
373 dbg("mos7840_get_uart_reg application number is %x",
377 ret
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0), MCS_RDREQ
,
378 MCS_RD_RTYPE
, Wval
, reg
, buf
, VENDOR_READ_LENGTH
,
386 static void mos7840_dump_serial_port(struct moschip_port
*mos7840_port
)
389 dbg("***************************************");
390 dbg("SpRegOffset is %2x", mos7840_port
->SpRegOffset
);
391 dbg("ControlRegOffset is %2x", mos7840_port
->ControlRegOffset
);
392 dbg("DCRRegOffset is %2x", mos7840_port
->DcrRegOffset
);
393 dbg("***************************************");
397 /************************************************************************/
398 /************************************************************************/
399 /* I N T E R F A C E F U N C T I O N S */
400 /* I N T E R F A C E F U N C T I O N S */
401 /************************************************************************/
402 /************************************************************************/
404 static inline void mos7840_set_port_private(struct usb_serial_port
*port
,
405 struct moschip_port
*data
)
407 usb_set_serial_port_data(port
, (void *)data
);
410 static inline struct moschip_port
*mos7840_get_port_private(struct
414 return (struct moschip_port
*)usb_get_serial_port_data(port
);
417 static void mos7840_handle_new_msr(struct moschip_port
*port
, __u8 new_msr
)
419 struct moschip_port
*mos7840_port
;
420 struct async_icount
*icount
;
422 icount
= &mos7840_port
->icount
;
424 (MOS_MSR_DELTA_CTS
| MOS_MSR_DELTA_DSR
| MOS_MSR_DELTA_RI
|
426 icount
= &mos7840_port
->icount
;
428 /* update input line counters */
429 if (new_msr
& MOS_MSR_DELTA_CTS
) {
433 if (new_msr
& MOS_MSR_DELTA_DSR
) {
437 if (new_msr
& MOS_MSR_DELTA_CD
) {
441 if (new_msr
& MOS_MSR_DELTA_RI
) {
448 static void mos7840_handle_new_lsr(struct moschip_port
*port
, __u8 new_lsr
)
450 struct async_icount
*icount
;
452 dbg("%s - %02x", __func__
, new_lsr
);
454 if (new_lsr
& SERIAL_LSR_BI
) {
456 * Parity and Framing errors only count if they
457 * occur exclusive of a break being
460 new_lsr
&= (__u8
) (SERIAL_LSR_OE
| SERIAL_LSR_BI
);
463 /* update input line counters */
464 icount
= &port
->icount
;
465 if (new_lsr
& SERIAL_LSR_BI
) {
469 if (new_lsr
& SERIAL_LSR_OE
) {
473 if (new_lsr
& SERIAL_LSR_PE
) {
477 if (new_lsr
& SERIAL_LSR_FE
) {
483 /************************************************************************/
484 /************************************************************************/
485 /* U S B C A L L B A C K F U N C T I O N S */
486 /* U S B C A L L B A C K F U N C T I O N S */
487 /************************************************************************/
488 /************************************************************************/
490 static void mos7840_control_callback(struct urb
*urb
)
493 struct moschip_port
*mos7840_port
;
496 int status
= urb
->status
;
498 mos7840_port
= urb
->context
;
507 /* this urb is terminated, clean up */
508 dbg("%s - urb shutting down with status: %d", __func__
,
512 dbg("%s - nonzero urb status received: %d", __func__
,
517 dbg("%s urb buffer size is %d", __func__
, urb
->actual_length
);
518 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__
,
519 mos7840_port
->MsrLsr
, mos7840_port
->port_num
);
520 data
= urb
->transfer_buffer
;
521 regval
= (__u8
) data
[0];
522 dbg("%s data is %x", __func__
, regval
);
523 if (mos7840_port
->MsrLsr
== 0)
524 mos7840_handle_new_msr(mos7840_port
, regval
);
525 else if (mos7840_port
->MsrLsr
== 1)
526 mos7840_handle_new_lsr(mos7840_port
, regval
);
529 spin_lock(&mos7840_port
->pool_lock
);
530 if (!mos7840_port
->zombie
)
531 result
= usb_submit_urb(mos7840_port
->int_urb
, GFP_ATOMIC
);
532 spin_unlock(&mos7840_port
->pool_lock
);
534 dev_err(&urb
->dev
->dev
,
535 "%s - Error %d submitting interrupt urb\n",
540 static int mos7840_get_reg(struct moschip_port
*mcs
, __u16 Wval
, __u16 reg
,
543 struct usb_device
*dev
= mcs
->port
->serial
->dev
;
544 struct usb_ctrlrequest
*dr
= mcs
->dr
;
545 unsigned char *buffer
= mcs
->ctrl_buf
;
548 dr
->bRequestType
= MCS_RD_RTYPE
;
549 dr
->bRequest
= MCS_RDREQ
;
550 dr
->wValue
= cpu_to_le16(Wval
); /* 0 */
551 dr
->wIndex
= cpu_to_le16(reg
);
552 dr
->wLength
= cpu_to_le16(2);
554 usb_fill_control_urb(mcs
->control_urb
, dev
, usb_rcvctrlpipe(dev
, 0),
555 (unsigned char *)dr
, buffer
, 2,
556 mos7840_control_callback
, mcs
);
557 mcs
->control_urb
->transfer_buffer_length
= 2;
558 ret
= usb_submit_urb(mcs
->control_urb
, GFP_ATOMIC
);
562 /*****************************************************************************
563 * mos7840_interrupt_callback
564 * this is the callback function for when we have received data on the
565 * interrupt endpoint.
566 *****************************************************************************/
568 static void mos7840_interrupt_callback(struct urb
*urb
)
572 struct moschip_port
*mos7840_port
;
573 struct usb_serial
*serial
;
578 __u16 wval
, wreg
= 0;
579 int status
= urb
->status
;
581 dbg("%s", " : Entering");
590 /* this urb is terminated, clean up */
591 dbg("%s - urb shutting down with status: %d", __func__
,
595 dbg("%s - nonzero urb status received: %d", __func__
,
600 length
= urb
->actual_length
;
601 data
= urb
->transfer_buffer
;
603 serial
= urb
->context
;
605 /* Moschip get 5 bytes
606 * Byte 1 IIR Port 1 (port.number is 0)
607 * Byte 2 IIR Port 2 (port.number is 1)
608 * Byte 3 IIR Port 3 (port.number is 2)
609 * Byte 4 IIR Port 4 (port.number is 3)
610 * Byte 5 FIFO status for both */
612 if (length
&& length
> 5) {
613 dbg("%s", "Wrong data !!!");
617 sp
[0] = (__u8
) data
[0];
618 sp
[1] = (__u8
) data
[1];
619 sp
[2] = (__u8
) data
[2];
620 sp
[3] = (__u8
) data
[3];
623 for (i
= 0; i
< serial
->num_ports
; i
++) {
624 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
626 (((__u16
) serial
->port
[i
]->number
-
627 (__u16
) (serial
->minor
)) + 1) << 8;
628 if (mos7840_port
->open
) {
630 dbg("SP%d No Interrupt !!!", i
);
632 switch (sp
[i
] & 0x0f) {
634 dbg("Serial Port %d: Receiver status error or ", i
);
635 dbg("address bit detected in 9-bit mode");
636 mos7840_port
->MsrLsr
= 1;
637 wreg
= LINE_STATUS_REGISTER
;
640 dbg("Serial Port %d: Modem status change", i
);
641 mos7840_port
->MsrLsr
= 0;
642 wreg
= MODEM_STATUS_REGISTER
;
645 spin_lock(&mos7840_port
->pool_lock
);
646 if (!mos7840_port
->zombie
) {
647 rv
= mos7840_get_reg(mos7840_port
, wval
, wreg
, &Data
);
649 spin_unlock(&mos7840_port
->pool_lock
);
652 spin_unlock(&mos7840_port
->pool_lock
);
657 /* the completion handler for the control urb will resubmit */
660 result
= usb_submit_urb(urb
, GFP_ATOMIC
);
662 dev_err(&urb
->dev
->dev
,
663 "%s - Error %d submitting interrupt urb\n",
668 static int mos7840_port_paranoia_check(struct usb_serial_port
*port
,
669 const char *function
)
672 dbg("%s - port == NULL", function
);
676 dbg("%s - port->serial == NULL", function
);
683 /* Inline functions to check the sanity of a pointer that is passed to us */
684 static int mos7840_serial_paranoia_check(struct usb_serial
*serial
,
685 const char *function
)
688 dbg("%s - serial == NULL", function
);
692 dbg("%s - serial->type == NULL!", function
);
699 static struct usb_serial
*mos7840_get_usb_serial(struct usb_serial_port
*port
,
700 const char *function
)
702 /* if no port was specified, or it fails a paranoia check */
704 mos7840_port_paranoia_check(port
, function
) ||
705 mos7840_serial_paranoia_check(port
->serial
, function
)) {
706 /* then say that we don't have a valid usb_serial thing,
707 * which will end up genrating -ENODEV return values */
714 /*****************************************************************************
715 * mos7840_bulk_in_callback
716 * this is the callback function for when we have received data on the
718 *****************************************************************************/
720 static void mos7840_bulk_in_callback(struct urb
*urb
)
724 struct usb_serial
*serial
;
725 struct usb_serial_port
*port
;
726 struct moschip_port
*mos7840_port
;
727 struct tty_struct
*tty
;
728 int status
= urb
->status
;
730 mos7840_port
= urb
->context
;
732 dbg("%s", "NULL mos7840_port pointer");
737 dbg("nonzero read bulk status received: %d", status
);
738 mos7840_port
->read_urb_busy
= false;
742 port
= (struct usb_serial_port
*)mos7840_port
->port
;
743 if (mos7840_port_paranoia_check(port
, __func__
)) {
744 dbg("%s", "Port Paranoia failed");
745 mos7840_port
->read_urb_busy
= false;
749 serial
= mos7840_get_usb_serial(port
, __func__
);
751 dbg("%s", "Bad serial pointer");
752 mos7840_port
->read_urb_busy
= false;
756 dbg("%s", "Entering... ");
758 data
= urb
->transfer_buffer
;
760 dbg("%s", "Entering ...........");
762 if (urb
->actual_length
) {
763 tty
= tty_port_tty_get(&mos7840_port
->port
->port
);
765 tty_insert_flip_string(tty
, data
, urb
->actual_length
);
767 tty_flip_buffer_push(tty
);
770 mos7840_port
->icount
.rx
+= urb
->actual_length
;
772 dbg("mos7840_port->icount.rx is %d:",
773 mos7840_port
->icount
.rx
);
776 if (!mos7840_port
->read_urb
) {
777 dbg("%s", "URB KILLED !!!");
778 mos7840_port
->read_urb_busy
= false;
783 mos7840_port
->read_urb
->dev
= serial
->dev
;
785 mos7840_port
->read_urb_busy
= true;
786 retval
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
789 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval
);
790 mos7840_port
->read_urb_busy
= false;
794 /*****************************************************************************
795 * mos7840_bulk_out_data_callback
796 * this is the callback function for when we have finished sending
797 * serial data on the bulk out endpoint.
798 *****************************************************************************/
800 static void mos7840_bulk_out_data_callback(struct urb
*urb
)
802 struct moschip_port
*mos7840_port
;
803 struct tty_struct
*tty
;
804 int status
= urb
->status
;
807 mos7840_port
= urb
->context
;
808 spin_lock(&mos7840_port
->pool_lock
);
809 for (i
= 0; i
< NUM_URBS
; i
++) {
810 if (urb
== mos7840_port
->write_urb_pool
[i
]) {
811 mos7840_port
->busy
[i
] = 0;
815 spin_unlock(&mos7840_port
->pool_lock
);
818 dbg("nonzero write bulk status received:%d", status
);
822 if (mos7840_port_paranoia_check(mos7840_port
->port
, __func__
)) {
823 dbg("%s", "Port Paranoia failed");
827 dbg("%s", "Entering .........");
829 tty
= tty_port_tty_get(&mos7840_port
->port
->port
);
830 if (tty
&& mos7840_port
->open
)
836 /************************************************************************/
837 /* 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 */
838 /************************************************************************/
839 #ifdef MCSSerialProbe
840 static int mos7840_serial_probe(struct usb_serial
*serial
,
841 const struct usb_device_id
*id
)
844 /*need to implement the mode_reg reading and updating\
845 structures usb_serial_ device_type\
846 (i.e num_ports, num_bulkin,bulkout etc) */
847 /* Also we can update the changes attach */
852 /*****************************************************************************
854 * this function is called by the tty driver when a port is opened
855 * If successful, we return 0
856 * Otherwise we return a negative error number.
857 *****************************************************************************/
859 static int mos7840_open(struct tty_struct
*tty
, struct usb_serial_port
*port
)
863 struct usb_serial
*serial
;
867 struct moschip_port
*mos7840_port
;
868 struct moschip_port
*port0
;
870 dbg ("%s enter", __func__
);
872 if (mos7840_port_paranoia_check(port
, __func__
)) {
873 dbg("%s", "Port Paranoia failed");
877 serial
= port
->serial
;
879 if (mos7840_serial_paranoia_check(serial
, __func__
)) {
880 dbg("%s", "Serial Paranoia failed");
884 mos7840_port
= mos7840_get_port_private(port
);
885 port0
= mos7840_get_port_private(serial
->port
[0]);
887 if (mos7840_port
== NULL
|| port0
== NULL
)
890 usb_clear_halt(serial
->dev
, port
->write_urb
->pipe
);
891 usb_clear_halt(serial
->dev
, port
->read_urb
->pipe
);
894 /* Initialising the write urb pool */
895 for (j
= 0; j
< NUM_URBS
; ++j
) {
896 urb
= usb_alloc_urb(0, GFP_KERNEL
);
897 mos7840_port
->write_urb_pool
[j
] = urb
;
900 dev_err(&port
->dev
, "No more urbs???\n");
904 urb
->transfer_buffer
= kmalloc(URB_TRANSFER_BUFFER_SIZE
,
906 if (!urb
->transfer_buffer
) {
908 mos7840_port
->write_urb_pool
[j
] = NULL
;
910 "%s-out of memory for urb buffers.\n",
916 /*****************************************************************************
917 * Initialize MCS7840 -- Write Init values to corresponding Registers
925 * 0x08 : SP1/2 Control Reg
926 *****************************************************************************/
928 /* NEED to check the following Block */
931 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
, &Data
);
933 dbg("Reading Spreg failed");
937 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
939 dbg("writing Spreg failed");
944 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
946 dbg("writing Spreg failed");
949 /* End of block to be checked */
952 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
955 dbg("Reading Controlreg failed");
958 Data
|= 0x08; /* Driver done bit */
959 Data
|= 0x20; /* rx_disable */
960 status
= mos7840_set_reg_sync(port
,
961 mos7840_port
->ControlRegOffset
, Data
);
963 dbg("writing Controlreg failed");
966 /* do register settings here */
967 /* Set all regs to the device default values. */
968 /***********************************
969 * First Disable all interrupts.
970 ***********************************/
972 status
= mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
974 dbg("disabling interrupts failed");
977 /* Set FIFO_CONTROL_REGISTER to the default value */
979 status
= mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
981 dbg("Writing FIFO_CONTROL_REGISTER failed");
986 status
= mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
988 dbg("Writing FIFO_CONTROL_REGISTER failed");
993 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
994 mos7840_port
->shadowLCR
= Data
;
997 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
998 mos7840_port
->shadowMCR
= Data
;
1001 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
1002 mos7840_port
->shadowLCR
= Data
;
1004 Data
|= SERIAL_LCR_DLAB
; /* data latch enable in LCR 0x80 */
1005 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1008 status
= mos7840_set_uart_reg(port
, DIVISOR_LATCH_LSB
, Data
);
1011 status
= mos7840_set_uart_reg(port
, DIVISOR_LATCH_MSB
, Data
);
1014 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
1016 Data
= Data
& ~SERIAL_LCR_DLAB
;
1017 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1018 mos7840_port
->shadowLCR
= Data
;
1020 /* clearing Bulkin and Bulkout Fifo */
1022 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
, &Data
);
1025 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
1027 Data
= Data
& ~0x0c;
1028 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
1029 /* Finally enable all interrupts */
1031 status
= mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
1033 /* clearing rx_disable */
1035 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1037 Data
= Data
& ~0x20;
1038 status
= mos7840_set_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1043 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1046 status
= mos7840_set_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1049 /* Check to see if we've set up our endpoint info yet *
1050 * (can't set it up in mos7840_startup as the structures *
1051 * were not set up at that time.) */
1052 if (port0
->open_ports
== 1) {
1053 if (serial
->port
[0]->interrupt_in_buffer
== NULL
) {
1054 /* set up interrupt urb */
1055 usb_fill_int_urb(serial
->port
[0]->interrupt_in_urb
,
1057 usb_rcvintpipe(serial
->dev
,
1058 serial
->port
[0]->interrupt_in_endpointAddress
),
1059 serial
->port
[0]->interrupt_in_buffer
,
1060 serial
->port
[0]->interrupt_in_urb
->
1061 transfer_buffer_length
,
1062 mos7840_interrupt_callback
,
1064 serial
->port
[0]->interrupt_in_urb
->interval
);
1066 /* start interrupt read for mos7840 *
1067 * will continue as long as mos7840 is connected */
1070 usb_submit_urb(serial
->port
[0]->interrupt_in_urb
,
1073 dev_err(&port
->dev
, "%s - Error %d submitting "
1074 "interrupt urb\n", __func__
, response
);
1081 /* see if we've set up our endpoint info yet *
1082 * (can't set it up in mos7840_startup as the *
1083 * structures were not set up at that time.) */
1085 dbg("port number is %d", port
->number
);
1086 dbg("serial number is %d", port
->serial
->minor
);
1087 dbg("Bulkin endpoint is %d", port
->bulk_in_endpointAddress
);
1088 dbg("BulkOut endpoint is %d", port
->bulk_out_endpointAddress
);
1089 dbg("Interrupt endpoint is %d", port
->interrupt_in_endpointAddress
);
1090 dbg("port's number in the device is %d", mos7840_port
->port_num
);
1091 mos7840_port
->read_urb
= port
->read_urb
;
1093 /* set up our bulk in urb */
1095 usb_fill_bulk_urb(mos7840_port
->read_urb
,
1097 usb_rcvbulkpipe(serial
->dev
,
1098 port
->bulk_in_endpointAddress
),
1099 port
->bulk_in_buffer
,
1100 mos7840_port
->read_urb
->transfer_buffer_length
,
1101 mos7840_bulk_in_callback
, mos7840_port
);
1103 dbg("mos7840_open: bulkin endpoint is %d",
1104 port
->bulk_in_endpointAddress
);
1105 mos7840_port
->read_urb_busy
= true;
1106 response
= usb_submit_urb(mos7840_port
->read_urb
, GFP_KERNEL
);
1108 dev_err(&port
->dev
, "%s - Error %d submitting control urb\n",
1109 __func__
, response
);
1110 mos7840_port
->read_urb_busy
= false;
1113 /* initialize our wait queues */
1114 init_waitqueue_head(&mos7840_port
->wait_chase
);
1115 init_waitqueue_head(&mos7840_port
->delta_msr_wait
);
1117 /* initialize our icount structure */
1118 memset(&(mos7840_port
->icount
), 0x00, sizeof(mos7840_port
->icount
));
1120 /* initialize our port settings */
1121 /* Must set to enable ints! */
1122 mos7840_port
->shadowMCR
= MCR_MASTER_IE
;
1123 /* send a open port command */
1124 mos7840_port
->open
= 1;
1125 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1126 mos7840_port
->icount
.tx
= 0;
1127 mos7840_port
->icount
.rx
= 0;
1129 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p",
1130 serial
, mos7840_port
, port
);
1132 dbg ("%s leave", __func__
);
1138 /*****************************************************************************
1139 * mos7840_chars_in_buffer
1140 * this function is called by the tty driver when it wants to know how many
1141 * bytes of data we currently have outstanding in the port (data that has
1142 * been written, but hasn't made it out the port yet)
1143 * If successful, we return the number of bytes left to be written in the
1145 * Otherwise we return zero.
1146 *****************************************************************************/
1148 static int mos7840_chars_in_buffer(struct tty_struct
*tty
)
1150 struct usb_serial_port
*port
= tty
->driver_data
;
1153 unsigned long flags
;
1154 struct moschip_port
*mos7840_port
;
1156 dbg("%s", " mos7840_chars_in_buffer:entering ...........");
1158 if (mos7840_port_paranoia_check(port
, __func__
)) {
1159 dbg("%s", "Invalid port");
1163 mos7840_port
= mos7840_get_port_private(port
);
1164 if (mos7840_port
== NULL
) {
1165 dbg("%s", "mos7840_break:leaving ...........");
1169 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1170 for (i
= 0; i
< NUM_URBS
; ++i
)
1171 if (mos7840_port
->busy
[i
])
1172 chars
+= URB_TRANSFER_BUFFER_SIZE
;
1173 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1174 dbg("%s - returns %d", __func__
, chars
);
1179 /*****************************************************************************
1181 * this function is called by the tty driver when a port is closed
1182 *****************************************************************************/
1184 static void mos7840_close(struct usb_serial_port
*port
)
1186 struct usb_serial
*serial
;
1187 struct moschip_port
*mos7840_port
;
1188 struct moschip_port
*port0
;
1192 dbg("%s", "mos7840_close:entering...");
1194 if (mos7840_port_paranoia_check(port
, __func__
)) {
1195 dbg("%s", "Port Paranoia failed");
1199 serial
= mos7840_get_usb_serial(port
, __func__
);
1201 dbg("%s", "Serial Paranoia failed");
1205 mos7840_port
= mos7840_get_port_private(port
);
1206 port0
= mos7840_get_port_private(serial
->port
[0]);
1208 if (mos7840_port
== NULL
|| port0
== NULL
)
1211 for (j
= 0; j
< NUM_URBS
; ++j
)
1212 usb_kill_urb(mos7840_port
->write_urb_pool
[j
]);
1214 /* Freeing Write URBs */
1215 for (j
= 0; j
< NUM_URBS
; ++j
) {
1216 if (mos7840_port
->write_urb_pool
[j
]) {
1217 if (mos7840_port
->write_urb_pool
[j
]->transfer_buffer
)
1218 kfree(mos7840_port
->write_urb_pool
[j
]->
1221 usb_free_urb(mos7840_port
->write_urb_pool
[j
]);
1225 /* While closing port, shutdown all bulk read, write *
1226 * and interrupt read if they exists */
1228 if (mos7840_port
->write_urb
) {
1229 dbg("%s", "Shutdown bulk write");
1230 usb_kill_urb(mos7840_port
->write_urb
);
1232 if (mos7840_port
->read_urb
) {
1233 dbg("%s", "Shutdown bulk read");
1234 usb_kill_urb(mos7840_port
->read_urb
);
1235 mos7840_port
->read_urb_busy
= false;
1237 if ((&mos7840_port
->control_urb
)) {
1238 dbg("%s", "Shutdown control read");
1239 /*/ usb_kill_urb (mos7840_port->control_urb); */
1242 /* if(mos7840_port->ctrl_buf != NULL) */
1243 /* kfree(mos7840_port->ctrl_buf); */
1244 port0
->open_ports
--;
1245 dbg("mos7840_num_open_ports in close%d:in port%d",
1246 port0
->open_ports
, port
->number
);
1247 if (port0
->open_ports
== 0) {
1248 if (serial
->port
[0]->interrupt_in_urb
) {
1249 dbg("%s", "Shutdown interrupt_in_urb");
1250 usb_kill_urb(serial
->port
[0]->interrupt_in_urb
);
1254 if (mos7840_port
->write_urb
) {
1255 /* if this urb had a transfer buffer already (old tx) free it */
1256 if (mos7840_port
->write_urb
->transfer_buffer
!= NULL
)
1257 kfree(mos7840_port
->write_urb
->transfer_buffer
);
1258 usb_free_urb(mos7840_port
->write_urb
);
1262 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
1265 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
1267 mos7840_port
->open
= 0;
1269 dbg("%s", "Leaving ............");
1272 /************************************************************************
1274 * mos7840_block_until_chase_response
1276 * This function will block the close until one of the following:
1277 * 1. Response to our Chase comes from mos7840
1278 * 2. A timeout of 10 seconds without activity has expired
1279 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1281 ************************************************************************/
1283 static void mos7840_block_until_chase_response(struct tty_struct
*tty
,
1284 struct moschip_port
*mos7840_port
)
1286 int timeout
= 1 * HZ
;
1291 count
= mos7840_chars_in_buffer(tty
);
1293 /* Check for Buffer status */
1297 /* Block the thread for a while */
1298 interruptible_sleep_on_timeout(&mos7840_port
->wait_chase
,
1300 /* No activity.. count down section */
1303 dbg("%s - TIMEOUT", __func__
);
1306 /* Reset timeout value back to seconds */
1313 /*****************************************************************************
1315 * this function sends a break to the port
1316 *****************************************************************************/
1317 static void mos7840_break(struct tty_struct
*tty
, int break_state
)
1319 struct usb_serial_port
*port
= tty
->driver_data
;
1321 struct usb_serial
*serial
;
1322 struct moschip_port
*mos7840_port
;
1324 dbg("%s", "Entering ...........");
1325 dbg("mos7840_break: Start");
1327 if (mos7840_port_paranoia_check(port
, __func__
)) {
1328 dbg("%s", "Port Paranoia failed");
1332 serial
= mos7840_get_usb_serial(port
, __func__
);
1334 dbg("%s", "Serial Paranoia failed");
1338 mos7840_port
= mos7840_get_port_private(port
);
1340 if (mos7840_port
== NULL
)
1344 /* flush and block until tx is empty */
1345 mos7840_block_until_chase_response(tty
, mos7840_port
);
1347 if (break_state
== -1)
1348 data
= mos7840_port
->shadowLCR
| LCR_SET_BREAK
;
1350 data
= mos7840_port
->shadowLCR
& ~LCR_SET_BREAK
;
1352 /* FIXME: no locking on shadowLCR anywhere in driver */
1353 mos7840_port
->shadowLCR
= data
;
1354 dbg("mcs7840_break mos7840_port->shadowLCR is %x",
1355 mos7840_port
->shadowLCR
);
1356 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
,
1357 mos7840_port
->shadowLCR
);
1362 /*****************************************************************************
1363 * mos7840_write_room
1364 * this function is called by the tty driver when it wants to know how many
1365 * bytes of data we can accept for a specific port.
1366 * If successful, we return the amount of room that we have for this port
1367 * Otherwise we return a negative error number.
1368 *****************************************************************************/
1370 static int mos7840_write_room(struct tty_struct
*tty
)
1372 struct usb_serial_port
*port
= tty
->driver_data
;
1375 unsigned long flags
;
1376 struct moschip_port
*mos7840_port
;
1378 dbg("%s", " mos7840_write_room:entering ...........");
1380 if (mos7840_port_paranoia_check(port
, __func__
)) {
1381 dbg("%s", "Invalid port");
1382 dbg("%s", " mos7840_write_room:leaving ...........");
1386 mos7840_port
= mos7840_get_port_private(port
);
1387 if (mos7840_port
== NULL
) {
1388 dbg("%s", "mos7840_break:leaving ...........");
1392 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1393 for (i
= 0; i
< NUM_URBS
; ++i
) {
1394 if (!mos7840_port
->busy
[i
])
1395 room
+= URB_TRANSFER_BUFFER_SIZE
;
1397 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1399 room
= (room
== 0) ? 0 : room
- URB_TRANSFER_BUFFER_SIZE
+ 1;
1400 dbg("%s - returns %d", __func__
, room
);
1405 /*****************************************************************************
1407 * this function is called by the tty driver when data should be written to
1409 * If successful, we return the number of bytes written, otherwise we
1410 * return a negative error number.
1411 *****************************************************************************/
1413 static int mos7840_write(struct tty_struct
*tty
, struct usb_serial_port
*port
,
1414 const unsigned char *data
, int count
)
1420 unsigned long flags
;
1422 struct moschip_port
*mos7840_port
;
1423 struct usb_serial
*serial
;
1426 const unsigned char *current_position
= data
;
1427 unsigned char *data1
;
1428 dbg("%s", "entering ...........");
1429 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1430 mos7840_port->shadowLCR); */
1434 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
1435 mos7840_port
->shadowLCR
= Data
;
1436 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data
);
1437 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1438 mos7840_port
->shadowLCR
);
1441 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1442 /* mos7840_port->shadowLCR=Data;//Need to add later */
1444 Data
|= SERIAL_LCR_DLAB
; /* data latch enable in LCR 0x80 */
1445 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1448 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1450 status
= mos7840_get_uart_reg(port
, DIVISOR_LATCH_LSB
, &Data
);
1451 dbg("mos7840_write:DLL value is %x", Data
);
1454 status
= mos7840_get_uart_reg(port
, DIVISOR_LATCH_MSB
, &Data
);
1455 dbg("mos7840_write:DLM value is %x", Data
);
1457 Data
= Data
& ~SERIAL_LCR_DLAB
;
1458 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1459 mos7840_port
->shadowLCR
);
1460 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1463 if (mos7840_port_paranoia_check(port
, __func__
)) {
1464 dbg("%s", "Port Paranoia failed");
1468 serial
= port
->serial
;
1469 if (mos7840_serial_paranoia_check(serial
, __func__
)) {
1470 dbg("%s", "Serial Paranoia failed");
1474 mos7840_port
= mos7840_get_port_private(port
);
1475 if (mos7840_port
== NULL
) {
1476 dbg("%s", "mos7840_port is NULL");
1480 /* try to find a free urb in the list */
1483 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1484 for (i
= 0; i
< NUM_URBS
; ++i
) {
1485 if (!mos7840_port
->busy
[i
]) {
1486 mos7840_port
->busy
[i
] = 1;
1487 urb
= mos7840_port
->write_urb_pool
[i
];
1492 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1495 dbg("%s - no more free urbs", __func__
);
1499 if (urb
->transfer_buffer
== NULL
) {
1500 urb
->transfer_buffer
=
1501 kmalloc(URB_TRANSFER_BUFFER_SIZE
, GFP_KERNEL
);
1503 if (urb
->transfer_buffer
== NULL
) {
1504 dev_err(&port
->dev
, "%s no more kernel memory...\n",
1509 transfer_size
= min(count
, URB_TRANSFER_BUFFER_SIZE
);
1511 memcpy(urb
->transfer_buffer
, current_position
, transfer_size
);
1513 /* fill urb with data and submit */
1514 usb_fill_bulk_urb(urb
,
1516 usb_sndbulkpipe(serial
->dev
,
1517 port
->bulk_out_endpointAddress
),
1518 urb
->transfer_buffer
,
1520 mos7840_bulk_out_data_callback
, mos7840_port
);
1522 data1
= urb
->transfer_buffer
;
1523 dbg("bulkout endpoint is %d", port
->bulk_out_endpointAddress
);
1525 /* send it down the pipe */
1526 status
= usb_submit_urb(urb
, GFP_ATOMIC
);
1529 mos7840_port
->busy
[i
] = 0;
1530 dev_err(&port
->dev
, "%s - usb_submit_urb(write bulk) failed "
1531 "with status = %d\n", __func__
, status
);
1532 bytes_sent
= status
;
1535 bytes_sent
= transfer_size
;
1536 mos7840_port
->icount
.tx
+= transfer_size
;
1538 dbg("mos7840_port->icount.tx is %d:", mos7840_port
->icount
.tx
);
1544 /*****************************************************************************
1546 * this function is called by the tty driver when it wants to stop the data
1547 * being read from the port.
1548 *****************************************************************************/
1550 static void mos7840_throttle(struct tty_struct
*tty
)
1552 struct usb_serial_port
*port
= tty
->driver_data
;
1553 struct moschip_port
*mos7840_port
;
1556 if (mos7840_port_paranoia_check(port
, __func__
)) {
1557 dbg("%s", "Invalid port");
1561 dbg("- port %d", port
->number
);
1563 mos7840_port
= mos7840_get_port_private(port
);
1565 if (mos7840_port
== NULL
)
1568 if (!mos7840_port
->open
) {
1569 dbg("%s", "port not opened");
1573 dbg("%s", "Entering ..........");
1575 /* if we are implementing XON/XOFF, send the stop character */
1577 unsigned char stop_char
= STOP_CHAR(tty
);
1578 status
= mos7840_write(tty
, port
, &stop_char
, 1);
1582 /* if we are implementing RTS/CTS, toggle that line */
1583 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1584 mos7840_port
->shadowMCR
&= ~MCR_RTS
;
1585 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1586 mos7840_port
->shadowMCR
);
1594 /*****************************************************************************
1595 * mos7840_unthrottle
1596 * this function is called by the tty driver when it wants to resume
1597 * the data being read from the port (called after mos7840_throttle is
1599 *****************************************************************************/
1600 static void mos7840_unthrottle(struct tty_struct
*tty
)
1602 struct usb_serial_port
*port
= tty
->driver_data
;
1604 struct moschip_port
*mos7840_port
= mos7840_get_port_private(port
);
1606 if (mos7840_port_paranoia_check(port
, __func__
)) {
1607 dbg("%s", "Invalid port");
1611 if (mos7840_port
== NULL
)
1614 if (!mos7840_port
->open
) {
1615 dbg("%s - port not opened", __func__
);
1619 dbg("%s", "Entering ..........");
1621 /* if we are implementing XON/XOFF, send the start character */
1623 unsigned char start_char
= START_CHAR(tty
);
1624 status
= mos7840_write(tty
, port
, &start_char
, 1);
1629 /* if we are implementing RTS/CTS, toggle that line */
1630 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1631 mos7840_port
->shadowMCR
|= MCR_RTS
;
1632 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1633 mos7840_port
->shadowMCR
);
1639 static int mos7840_tiocmget(struct tty_struct
*tty
, struct file
*file
)
1641 struct usb_serial_port
*port
= tty
->driver_data
;
1642 struct moschip_port
*mos7840_port
;
1643 unsigned int result
;
1647 mos7840_port
= mos7840_get_port_private(port
);
1649 dbg("%s - port %d", __func__
, port
->number
);
1651 if (mos7840_port
== NULL
)
1654 status
= mos7840_get_uart_reg(port
, MODEM_STATUS_REGISTER
, &msr
);
1655 status
= mos7840_get_uart_reg(port
, MODEM_CONTROL_REGISTER
, &mcr
);
1656 result
= ((mcr
& MCR_DTR
) ? TIOCM_DTR
: 0)
1657 | ((mcr
& MCR_RTS
) ? TIOCM_RTS
: 0)
1658 | ((mcr
& MCR_LOOPBACK
) ? TIOCM_LOOP
: 0)
1659 | ((msr
& MOS7840_MSR_CTS
) ? TIOCM_CTS
: 0)
1660 | ((msr
& MOS7840_MSR_CD
) ? TIOCM_CAR
: 0)
1661 | ((msr
& MOS7840_MSR_RI
) ? TIOCM_RI
: 0)
1662 | ((msr
& MOS7840_MSR_DSR
) ? TIOCM_DSR
: 0);
1664 dbg("%s - 0x%04X", __func__
, result
);
1669 static int mos7840_tiocmset(struct tty_struct
*tty
, struct file
*file
,
1670 unsigned int set
, unsigned int clear
)
1672 struct usb_serial_port
*port
= tty
->driver_data
;
1673 struct moschip_port
*mos7840_port
;
1677 dbg("%s - port %d", __func__
, port
->number
);
1679 mos7840_port
= mos7840_get_port_private(port
);
1681 if (mos7840_port
== NULL
)
1684 /* FIXME: What locks the port registers ? */
1685 mcr
= mos7840_port
->shadowMCR
;
1686 if (clear
& TIOCM_RTS
)
1688 if (clear
& TIOCM_DTR
)
1690 if (clear
& TIOCM_LOOP
)
1691 mcr
&= ~MCR_LOOPBACK
;
1693 if (set
& TIOCM_RTS
)
1695 if (set
& TIOCM_DTR
)
1697 if (set
& TIOCM_LOOP
)
1698 mcr
|= MCR_LOOPBACK
;
1700 mos7840_port
->shadowMCR
= mcr
;
1702 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, mcr
);
1704 dbg("setting MODEM_CONTROL_REGISTER Failed");
1711 /*****************************************************************************
1712 * mos7840_calc_baud_rate_divisor
1713 * this function calculates the proper baud rate divisor for the specified
1715 *****************************************************************************/
1716 static int mos7840_calc_baud_rate_divisor(int baudRate
, int *divisor
,
1720 dbg("%s - %d", __func__
, baudRate
);
1722 if (baudRate
<= 115200) {
1723 *divisor
= 115200 / baudRate
;
1726 if ((baudRate
> 115200) && (baudRate
<= 230400)) {
1727 *divisor
= 230400 / baudRate
;
1728 *clk_sel_val
= 0x10;
1729 } else if ((baudRate
> 230400) && (baudRate
<= 403200)) {
1730 *divisor
= 403200 / baudRate
;
1731 *clk_sel_val
= 0x20;
1732 } else if ((baudRate
> 403200) && (baudRate
<= 460800)) {
1733 *divisor
= 460800 / baudRate
;
1734 *clk_sel_val
= 0x30;
1735 } else if ((baudRate
> 460800) && (baudRate
<= 806400)) {
1736 *divisor
= 806400 / baudRate
;
1737 *clk_sel_val
= 0x40;
1738 } else if ((baudRate
> 806400) && (baudRate
<= 921600)) {
1739 *divisor
= 921600 / baudRate
;
1740 *clk_sel_val
= 0x50;
1741 } else if ((baudRate
> 921600) && (baudRate
<= 1572864)) {
1742 *divisor
= 1572864 / baudRate
;
1743 *clk_sel_val
= 0x60;
1744 } else if ((baudRate
> 1572864) && (baudRate
<= 3145728)) {
1745 *divisor
= 3145728 / baudRate
;
1746 *clk_sel_val
= 0x70;
1752 for (i
= 0; i
< ARRAY_SIZE(mos7840_divisor_table
); i
++) {
1753 if (mos7840_divisor_table
[i
].BaudRate
== baudrate
) {
1754 *divisor
= mos7840_divisor_table
[i
].Divisor
;
1759 /* After trying for all the standard baud rates *
1760 * Try calculating the divisor for this baud rate */
1762 if (baudrate
> 75 && baudrate
< 230400) {
1763 /* get the divisor */
1764 custom
= (__u16
) (230400L / baudrate
);
1766 /* Check for round off */
1767 round1
= (__u16
) (2304000L / baudrate
);
1768 round
= (__u16
) (round1
- (custom
* 10));
1773 dbg(" Baud %d = %d", baudrate
, custom
);
1777 dbg("%s", " Baud calculation Failed...");
1782 /*****************************************************************************
1783 * mos7840_send_cmd_write_baud_rate
1784 * this function sends the proper command to change the baud rate of the
1786 *****************************************************************************/
1788 static int mos7840_send_cmd_write_baud_rate(struct moschip_port
*mos7840_port
,
1794 unsigned char number
;
1796 struct usb_serial_port
*port
;
1798 if (mos7840_port
== NULL
)
1801 port
= (struct usb_serial_port
*)mos7840_port
->port
;
1802 if (mos7840_port_paranoia_check(port
, __func__
)) {
1803 dbg("%s", "Invalid port");
1807 if (mos7840_serial_paranoia_check(port
->serial
, __func__
)) {
1808 dbg("%s", "Invalid Serial");
1812 dbg("%s", "Entering ..........");
1814 number
= mos7840_port
->port
->number
- mos7840_port
->port
->serial
->minor
;
1816 dbg("%s - port = %d, baud = %d", __func__
,
1817 mos7840_port
->port
->number
, baudRate
);
1818 /* reset clk_uart_sel in spregOffset */
1819 if (baudRate
> 115200) {
1820 #ifdef HW_flow_control
1821 /* NOTE: need to see the pther register to modify */
1822 /* setting h/w flow control bit to 1 */
1824 mos7840_port
->shadowMCR
= Data
;
1825 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1828 dbg("Writing spreg failed in set_serial_baud");
1834 #ifdef HW_flow_control
1835 / *setting h
/w flow control bit to
0 */
1837 mos7840_port
->shadowMCR
= Data
;
1838 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1841 dbg("Writing spreg failed in set_serial_baud");
1848 if (1) { /* baudRate <= 115200) */
1851 status
= mos7840_calc_baud_rate_divisor(baudRate
, &divisor
,
1853 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
,
1856 dbg("reading spreg failed in set_serial_baud");
1859 Data
= (Data
& 0x8f) | clk_sel_val
;
1860 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
,
1863 dbg("Writing spreg failed in set_serial_baud");
1866 /* Calculate the Divisor */
1869 dev_err(&port
->dev
, "%s - bad baud rate\n", __func__
);
1872 /* Enable access to divisor latch */
1873 Data
= mos7840_port
->shadowLCR
| SERIAL_LCR_DLAB
;
1874 mos7840_port
->shadowLCR
= Data
;
1875 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1877 /* Write the divisor */
1878 Data
= (unsigned char)(divisor
& 0xff);
1879 dbg("set_serial_baud Value to write DLL is %x", Data
);
1880 mos7840_set_uart_reg(port
, DIVISOR_LATCH_LSB
, Data
);
1882 Data
= (unsigned char)((divisor
& 0xff00) >> 8);
1883 dbg("set_serial_baud Value to write DLM is %x", Data
);
1884 mos7840_set_uart_reg(port
, DIVISOR_LATCH_MSB
, Data
);
1886 /* Disable access to divisor latch */
1887 Data
= mos7840_port
->shadowLCR
& ~SERIAL_LCR_DLAB
;
1888 mos7840_port
->shadowLCR
= Data
;
1889 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1895 /*****************************************************************************
1896 * mos7840_change_port_settings
1897 * This routine is called to set the UART on the device to match
1898 * the specified new settings.
1899 *****************************************************************************/
1901 static void mos7840_change_port_settings(struct tty_struct
*tty
,
1902 struct moschip_port
*mos7840_port
, struct ktermios
*old_termios
)
1912 struct usb_serial_port
*port
;
1913 struct usb_serial
*serial
;
1915 if (mos7840_port
== NULL
)
1918 port
= (struct usb_serial_port
*)mos7840_port
->port
;
1920 if (mos7840_port_paranoia_check(port
, __func__
)) {
1921 dbg("%s", "Invalid port");
1925 if (mos7840_serial_paranoia_check(port
->serial
, __func__
)) {
1926 dbg("%s", "Invalid Serial");
1930 serial
= port
->serial
;
1932 dbg("%s - port %d", __func__
, mos7840_port
->port
->number
);
1934 if (!mos7840_port
->open
) {
1935 dbg("%s - port not opened", __func__
);
1939 dbg("%s", "Entering ..........");
1943 lParity
= LCR_PAR_NONE
;
1945 cflag
= tty
->termios
->c_cflag
;
1946 iflag
= tty
->termios
->c_iflag
;
1948 /* Change the number of bits */
1949 if (cflag
& CSIZE
) {
1950 switch (cflag
& CSIZE
) {
1968 /* Change the Parity bit */
1969 if (cflag
& PARENB
) {
1970 if (cflag
& PARODD
) {
1971 lParity
= LCR_PAR_ODD
;
1972 dbg("%s - parity = odd", __func__
);
1974 lParity
= LCR_PAR_EVEN
;
1975 dbg("%s - parity = even", __func__
);
1979 dbg("%s - parity = none", __func__
);
1983 lParity
= lParity
| 0x20;
1985 /* Change the Stop bit */
1986 if (cflag
& CSTOPB
) {
1988 dbg("%s - stop bits = 2", __func__
);
1991 dbg("%s - stop bits = 1", __func__
);
1994 /* Update the LCR with the correct value */
1995 mos7840_port
->shadowLCR
&=
1996 ~(LCR_BITS_MASK
| LCR_STOP_MASK
| LCR_PAR_MASK
);
1997 mos7840_port
->shadowLCR
|= (lData
| lParity
| lStop
);
1999 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x",
2000 mos7840_port
->shadowLCR
);
2001 /* Disable Interrupts */
2003 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
2006 mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
2009 mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
2011 /* Send the updated LCR value to the mos7840 */
2012 Data
= mos7840_port
->shadowLCR
;
2014 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
2017 mos7840_port
->shadowMCR
= Data
;
2018 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2020 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2022 /* set up the MCR register and send it to the mos7840 */
2024 mos7840_port
->shadowMCR
= MCR_MASTER_IE
;
2026 mos7840_port
->shadowMCR
|= (MCR_DTR
| MCR_RTS
);
2028 if (cflag
& CRTSCTS
)
2029 mos7840_port
->shadowMCR
|= (MCR_XON_ANY
);
2031 mos7840_port
->shadowMCR
&= ~(MCR_XON_ANY
);
2033 Data
= mos7840_port
->shadowMCR
;
2034 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2036 /* Determine divisor based on baud rate */
2037 baud
= tty_get_baud_rate(tty
);
2040 /* pick a default, any default... */
2041 dbg("%s", "Picked default baud...");
2045 dbg("%s - baud rate = %d", __func__
, baud
);
2046 status
= mos7840_send_cmd_write_baud_rate(mos7840_port
, baud
);
2048 /* Enable Interrupts */
2050 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
2052 if (mos7840_port
->read_urb_busy
== false) {
2053 mos7840_port
->read_urb
->dev
= serial
->dev
;
2054 mos7840_port
->read_urb_busy
= true;
2055 status
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
2057 dbg("usb_submit_urb(read bulk) failed, status = %d",
2059 mos7840_port
->read_urb_busy
= false;
2062 wake_up(&mos7840_port
->delta_msr_wait
);
2063 mos7840_port
->delta_msr_cond
= 1;
2064 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x",
2065 mos7840_port
->shadowLCR
);
2070 /*****************************************************************************
2071 * mos7840_set_termios
2072 * this function is called by the tty driver when it wants to change
2073 * the termios structure
2074 *****************************************************************************/
2076 static void mos7840_set_termios(struct tty_struct
*tty
,
2077 struct usb_serial_port
*port
,
2078 struct ktermios
*old_termios
)
2082 struct usb_serial
*serial
;
2083 struct moschip_port
*mos7840_port
;
2084 dbg("mos7840_set_termios: START");
2085 if (mos7840_port_paranoia_check(port
, __func__
)) {
2086 dbg("%s", "Invalid port");
2090 serial
= port
->serial
;
2092 if (mos7840_serial_paranoia_check(serial
, __func__
)) {
2093 dbg("%s", "Invalid Serial");
2097 mos7840_port
= mos7840_get_port_private(port
);
2099 if (mos7840_port
== NULL
)
2102 if (!mos7840_port
->open
) {
2103 dbg("%s - port not opened", __func__
);
2107 dbg("%s", "setting termios - ");
2109 cflag
= tty
->termios
->c_cflag
;
2111 dbg("%s - clfag %08x iflag %08x", __func__
,
2112 tty
->termios
->c_cflag
, RELEVANT_IFLAG(tty
->termios
->c_iflag
));
2113 dbg("%s - old clfag %08x old iflag %08x", __func__
,
2114 old_termios
->c_cflag
, RELEVANT_IFLAG(old_termios
->c_iflag
));
2115 dbg("%s - port %d", __func__
, port
->number
);
2117 /* change the port settings to the new ones specified */
2119 mos7840_change_port_settings(tty
, mos7840_port
, old_termios
);
2121 if (!mos7840_port
->read_urb
) {
2122 dbg("%s", "URB KILLED !!!!!");
2126 if (mos7840_port
->read_urb_busy
== false) {
2127 mos7840_port
->read_urb
->dev
= serial
->dev
;
2128 mos7840_port
->read_urb_busy
= true;
2129 status
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
2131 dbg("usb_submit_urb(read bulk) failed, status = %d",
2133 mos7840_port
->read_urb_busy
= false;
2139 /*****************************************************************************
2140 * mos7840_get_lsr_info - get line status register info
2142 * Purpose: Let user call ioctl() to get info when the UART physically
2143 * is emptied. On bus types like RS485, the transmitter must
2144 * release the bus after transmitting. This must be done when
2145 * the transmit shift register is empty, not be done when the
2146 * transmit holding register is empty. This functionality
2147 * allows an RS485 driver to be written in user space.
2148 *****************************************************************************/
2150 static int mos7840_get_lsr_info(struct tty_struct
*tty
,
2151 unsigned int __user
*value
)
2154 unsigned int result
= 0;
2156 count
= mos7840_chars_in_buffer(tty
);
2158 dbg("%s -- Empty", __func__
);
2159 result
= TIOCSER_TEMT
;
2162 if (copy_to_user(value
, &result
, sizeof(int)))
2167 /*****************************************************************************
2168 * mos7840_get_serial_info
2169 * function to get information about serial port
2170 *****************************************************************************/
2172 static int mos7840_get_serial_info(struct moschip_port
*mos7840_port
,
2173 struct serial_struct __user
*retinfo
)
2175 struct serial_struct tmp
;
2177 if (mos7840_port
== NULL
)
2183 memset(&tmp
, 0, sizeof(tmp
));
2185 tmp
.type
= PORT_16550A
;
2186 tmp
.line
= mos7840_port
->port
->serial
->minor
;
2187 tmp
.port
= mos7840_port
->port
->number
;
2189 tmp
.flags
= ASYNC_SKIP_TEST
| ASYNC_AUTO_IRQ
;
2190 tmp
.xmit_fifo_size
= NUM_URBS
* URB_TRANSFER_BUFFER_SIZE
;
2191 tmp
.baud_base
= 9600;
2192 tmp
.close_delay
= 5 * HZ
;
2193 tmp
.closing_wait
= 30 * HZ
;
2195 if (copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)))
2200 /*****************************************************************************
2202 * this function handles any ioctl calls to the driver
2203 *****************************************************************************/
2205 static int mos7840_ioctl(struct tty_struct
*tty
, struct file
*file
,
2206 unsigned int cmd
, unsigned long arg
)
2208 struct usb_serial_port
*port
= tty
->driver_data
;
2209 void __user
*argp
= (void __user
*)arg
;
2210 struct moschip_port
*mos7840_port
;
2212 struct async_icount cnow
;
2213 struct async_icount cprev
;
2214 struct serial_icounter_struct icount
;
2216 if (mos7840_port_paranoia_check(port
, __func__
)) {
2217 dbg("%s", "Invalid port");
2221 mos7840_port
= mos7840_get_port_private(port
);
2223 if (mos7840_port
== NULL
)
2226 dbg("%s - port %d, cmd = 0x%x", __func__
, port
->number
, cmd
);
2229 /* return number of bytes available */
2232 dbg("%s (%d) TIOCSERGETLSR", __func__
, port
->number
);
2233 return mos7840_get_lsr_info(tty
, argp
);
2237 dbg("%s (%d) TIOCGSERIAL", __func__
, port
->number
);
2238 return mos7840_get_serial_info(mos7840_port
, argp
);
2241 dbg("%s (%d) TIOCSSERIAL", __func__
, port
->number
);
2245 dbg("%s (%d) TIOCMIWAIT", __func__
, port
->number
);
2246 cprev
= mos7840_port
->icount
;
2248 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2249 mos7840_port
->delta_msr_cond
= 0;
2250 wait_event_interruptible(mos7840_port
->delta_msr_wait
,
2252 delta_msr_cond
== 1));
2254 /* see if a signal did it */
2255 if (signal_pending(current
))
2256 return -ERESTARTSYS
;
2257 cnow
= mos7840_port
->icount
;
2259 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
2260 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
)
2261 return -EIO
; /* no change => error */
2262 if (((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
.rng
)) ||
2263 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
.dsr
)) ||
2264 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
.dcd
)) ||
2265 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
.cts
))) {
2274 cnow
= mos7840_port
->icount
;
2276 icount
.cts
= cnow
.cts
;
2277 icount
.dsr
= cnow
.dsr
;
2278 icount
.rng
= cnow
.rng
;
2279 icount
.dcd
= cnow
.dcd
;
2280 icount
.rx
= cnow
.rx
;
2281 icount
.tx
= cnow
.tx
;
2282 icount
.frame
= cnow
.frame
;
2283 icount
.overrun
= cnow
.overrun
;
2284 icount
.parity
= cnow
.parity
;
2285 icount
.brk
= cnow
.brk
;
2286 icount
.buf_overrun
= cnow
.buf_overrun
;
2288 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__
,
2289 port
->number
, icount
.rx
, icount
.tx
);
2290 if (copy_to_user(argp
, &icount
, sizeof(icount
)))
2296 return -ENOIOCTLCMD
;
2299 static int mos7840_calc_num_ports(struct usb_serial
*serial
)
2301 int mos7840_num_ports
= 0;
2303 dbg("numberofendpoints: cur %d, alt %d",
2304 (int)serial
->interface
->cur_altsetting
->desc
.bNumEndpoints
,
2305 (int)serial
->interface
->altsetting
->desc
.bNumEndpoints
);
2306 if (serial
->interface
->cur_altsetting
->desc
.bNumEndpoints
== 5) {
2307 mos7840_num_ports
= serial
->num_ports
= 2;
2308 } else if (serial
->interface
->cur_altsetting
->desc
.bNumEndpoints
== 9) {
2309 serial
->num_bulk_in
= 4;
2310 serial
->num_bulk_out
= 4;
2311 mos7840_num_ports
= serial
->num_ports
= 4;
2313 dbg ("mos7840_num_ports = %d", mos7840_num_ports
);
2314 return mos7840_num_ports
;
2317 /****************************************************************************
2319 ****************************************************************************/
2321 static int mos7840_startup(struct usb_serial
*serial
)
2323 struct moschip_port
*mos7840_port
;
2324 struct usb_device
*dev
;
2328 dbg("%s", "mos7840_startup :Entering..........");
2331 dbg("%s", "Invalid Handler");
2337 dbg("%s", "Entering...");
2338 dbg ("mos7840_startup: serial = %p", serial
);
2340 /* we set up the pointers to the endpoints in the mos7840_open *
2341 * function, as the structures aren't created yet. */
2343 /* set up port private structures */
2344 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2345 dbg ("mos7840_startup: configuring port %d............", i
);
2346 mos7840_port
= kzalloc(sizeof(struct moschip_port
), GFP_KERNEL
);
2347 if (mos7840_port
== NULL
) {
2348 dev_err(&dev
->dev
, "%s - Out of memory\n", __func__
);
2350 i
--; /* don't follow NULL pointer cleaning up */
2354 /* Initialize all port interrupt end point to port 0 int
2355 * endpoint. Our device has only one interrupt end point
2356 * common to all port */
2358 mos7840_port
->port
= serial
->port
[i
];
2359 mos7840_set_port_private(serial
->port
[i
], mos7840_port
);
2360 spin_lock_init(&mos7840_port
->pool_lock
);
2362 /* minor is not initialised until later by
2363 * usb-serial.c:get_free_serial() and cannot therefore be used
2364 * to index device instances */
2365 mos7840_port
->port_num
= i
+ 1;
2366 dbg ("serial->port[i]->number = %d", serial
->port
[i
]->number
);
2367 dbg ("serial->port[i]->serial->minor = %d", serial
->port
[i
]->serial
->minor
);
2368 dbg ("mos7840_port->port_num = %d", mos7840_port
->port_num
);
2369 dbg ("serial->minor = %d", serial
->minor
);
2371 if (mos7840_port
->port_num
== 1) {
2372 mos7840_port
->SpRegOffset
= 0x0;
2373 mos7840_port
->ControlRegOffset
= 0x1;
2374 mos7840_port
->DcrRegOffset
= 0x4;
2375 } else if ((mos7840_port
->port_num
== 2)
2376 && (serial
->num_ports
== 4)) {
2377 mos7840_port
->SpRegOffset
= 0x8;
2378 mos7840_port
->ControlRegOffset
= 0x9;
2379 mos7840_port
->DcrRegOffset
= 0x16;
2380 } else if ((mos7840_port
->port_num
== 2)
2381 && (serial
->num_ports
== 2)) {
2382 mos7840_port
->SpRegOffset
= 0xa;
2383 mos7840_port
->ControlRegOffset
= 0xb;
2384 mos7840_port
->DcrRegOffset
= 0x19;
2385 } else if ((mos7840_port
->port_num
== 3)
2386 && (serial
->num_ports
== 4)) {
2387 mos7840_port
->SpRegOffset
= 0xa;
2388 mos7840_port
->ControlRegOffset
= 0xb;
2389 mos7840_port
->DcrRegOffset
= 0x19;
2390 } else if ((mos7840_port
->port_num
== 4)
2391 && (serial
->num_ports
== 4)) {
2392 mos7840_port
->SpRegOffset
= 0xc;
2393 mos7840_port
->ControlRegOffset
= 0xd;
2394 mos7840_port
->DcrRegOffset
= 0x1c;
2396 mos7840_dump_serial_port(mos7840_port
);
2397 mos7840_set_port_private(serial
->port
[i
], mos7840_port
);
2399 /* enable rx_disable bit in control register */
2400 status
= mos7840_get_reg_sync(serial
->port
[i
],
2401 mos7840_port
->ControlRegOffset
, &Data
);
2403 dbg("Reading ControlReg failed status-0x%x", status
);
2406 dbg("ControlReg Reading success val is %x, status%d",
2408 Data
|= 0x08; /* setting driver done bit */
2409 Data
|= 0x04; /* sp1_bit to have cts change reflect in
2412 /* Data |= 0x20; //rx_disable bit */
2413 status
= mos7840_set_reg_sync(serial
->port
[i
],
2414 mos7840_port
->ControlRegOffset
, Data
);
2416 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status
);
2419 dbg("ControlReg Writing success(rx_disable) status%d",
2422 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2425 status
= mos7840_set_reg_sync(serial
->port
[i
],
2426 (__u16
) (mos7840_port
->DcrRegOffset
+ 0), Data
);
2428 dbg("Writing DCR0 failed status-0x%x", status
);
2431 dbg("DCR0 Writing success status%d", status
);
2434 status
= mos7840_set_reg_sync(serial
->port
[i
],
2435 (__u16
) (mos7840_port
->DcrRegOffset
+ 1), Data
);
2437 dbg("Writing DCR1 failed status-0x%x", status
);
2440 dbg("DCR1 Writing success status%d", status
);
2443 status
= mos7840_set_reg_sync(serial
->port
[i
],
2444 (__u16
) (mos7840_port
->DcrRegOffset
+ 2), Data
);
2446 dbg("Writing DCR2 failed status-0x%x", status
);
2449 dbg("DCR2 Writing success status%d", status
);
2451 /* write values in clkstart0x0 and clkmulti 0x20 */
2453 status
= mos7840_set_reg_sync(serial
->port
[i
],
2454 CLK_START_VALUE_REGISTER
, Data
);
2456 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status
);
2459 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status
);
2462 status
= mos7840_set_reg_sync(serial
->port
[i
],
2463 CLK_MULTI_REGISTER
, Data
);
2465 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x",
2469 dbg("CLK_MULTI_REGISTER Writing success status%d",
2472 /* write value 0x0 to scratchpad register */
2474 status
= mos7840_set_uart_reg(serial
->port
[i
],
2475 SCRATCH_PAD_REGISTER
, Data
);
2477 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x",
2481 dbg("SCRATCH_PAD_REGISTER Writing success status%d",
2484 /* Zero Length flag register */
2485 if ((mos7840_port
->port_num
!= 1)
2486 && (serial
->num_ports
== 2)) {
2489 status
= mos7840_set_reg_sync(serial
->port
[i
],
2491 ((__u16
)mos7840_port
->port_num
)), Data
);
2492 dbg("ZLIP offset %x",
2494 ((__u16
) mos7840_port
->port_num
)));
2496 dbg("Writing ZLP_REG%d failed status-0x%x",
2500 dbg("ZLP_REG%d Writing success status%d",
2504 status
= mos7840_set_reg_sync(serial
->port
[i
],
2506 ((__u16
)mos7840_port
->port_num
) - 0x1), Data
);
2507 dbg("ZLIP offset %x",
2509 ((__u16
) mos7840_port
->port_num
) - 0x1));
2511 dbg("Writing ZLP_REG%d failed status-0x%x",
2515 dbg("ZLP_REG%d Writing success status%d",
2519 mos7840_port
->control_urb
= usb_alloc_urb(0, GFP_KERNEL
);
2520 mos7840_port
->ctrl_buf
= kmalloc(16, GFP_KERNEL
);
2521 mos7840_port
->dr
= kmalloc(sizeof(struct usb_ctrlrequest
),
2523 if (!mos7840_port
->control_urb
|| !mos7840_port
->ctrl_buf
||
2524 !mos7840_port
->dr
) {
2529 dbg ("mos7840_startup: all ports configured...........");
2531 /* Zero Length flag enable */
2533 status
= mos7840_set_reg_sync(serial
->port
[0], ZLP_REG5
, Data
);
2535 dbg("Writing ZLP_REG5 failed status-0x%x", status
);
2538 dbg("ZLP_REG5 Writing success status%d", status
);
2540 /* setting configuration feature to one */
2541 usb_control_msg(serial
->dev
, usb_sndctrlpipe(serial
->dev
, 0),
2542 (__u8
) 0x03, 0x00, 0x01, 0x00, NULL
, 0x00, 5 * HZ
);
2545 for (/* nothing */; i
>= 0; i
--) {
2546 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
2548 kfree(mos7840_port
->dr
);
2549 kfree(mos7840_port
->ctrl_buf
);
2550 usb_free_urb(mos7840_port
->control_urb
);
2551 kfree(mos7840_port
);
2552 serial
->port
[i
] = NULL
;
2557 /****************************************************************************
2558 * mos7840_disconnect
2559 * This function is called whenever the device is removed from the usb bus.
2560 ****************************************************************************/
2562 static void mos7840_disconnect(struct usb_serial
*serial
)
2565 unsigned long flags
;
2566 struct moschip_port
*mos7840_port
;
2567 dbg("%s", " disconnect :entering..........");
2570 dbg("%s", "Invalid Handler");
2574 /* check for the ports to be closed,close the ports and disconnect */
2576 /* free private structure allocated for serial port *
2577 * stop reads and writes on all ports */
2579 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2580 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
2581 dbg ("mos7840_port %d = %p", i
, mos7840_port
);
2583 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
2584 mos7840_port
->zombie
= 1;
2585 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
2586 usb_kill_urb(mos7840_port
->control_urb
);
2590 dbg("%s", "Thank u :: ");
2594 /****************************************************************************
2596 * This function is called when the usb_serial structure is freed.
2597 ****************************************************************************/
2599 static void mos7840_release(struct usb_serial
*serial
)
2602 struct moschip_port
*mos7840_port
;
2603 dbg("%s", " release :entering..........");
2606 dbg("%s", "Invalid Handler");
2610 /* check for the ports to be closed,close the ports and disconnect */
2612 /* free private structure allocated for serial port *
2613 * stop reads and writes on all ports */
2615 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2616 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
2617 dbg("mos7840_port %d = %p", i
, mos7840_port
);
2619 kfree(mos7840_port
->ctrl_buf
);
2620 kfree(mos7840_port
->dr
);
2621 kfree(mos7840_port
);
2625 dbg("%s", "Thank u :: ");
2629 static struct usb_driver io_driver
= {
2631 .probe
= usb_serial_probe
,
2632 .disconnect
= usb_serial_disconnect
,
2633 .id_table
= moschip_id_table_combined
,
2637 static struct usb_serial_driver moschip7840_4port_device
= {
2639 .owner
= THIS_MODULE
,
2642 .description
= DRIVER_DESC
,
2643 .usb_driver
= &io_driver
,
2644 .id_table
= moschip_port_id_table
,
2646 .open
= mos7840_open
,
2647 .close
= mos7840_close
,
2648 .write
= mos7840_write
,
2649 .write_room
= mos7840_write_room
,
2650 .chars_in_buffer
= mos7840_chars_in_buffer
,
2651 .throttle
= mos7840_throttle
,
2652 .unthrottle
= mos7840_unthrottle
,
2653 .calc_num_ports
= mos7840_calc_num_ports
,
2654 #ifdef MCSSerialProbe
2655 .probe
= mos7840_serial_probe
,
2657 .ioctl
= mos7840_ioctl
,
2658 .set_termios
= mos7840_set_termios
,
2659 .break_ctl
= mos7840_break
,
2660 .tiocmget
= mos7840_tiocmget
,
2661 .tiocmset
= mos7840_tiocmset
,
2662 .attach
= mos7840_startup
,
2663 .disconnect
= mos7840_disconnect
,
2664 .release
= mos7840_release
,
2665 .read_bulk_callback
= mos7840_bulk_in_callback
,
2666 .read_int_callback
= mos7840_interrupt_callback
,
2669 /****************************************************************************
2671 * This is called by the module subsystem, or on startup to initialize us
2672 ****************************************************************************/
2673 static int __init
moschip7840_init(void)
2677 dbg("%s", " mos7840_init :entering..........");
2679 /* Register with the usb serial */
2680 retval
= usb_serial_register(&moschip7840_4port_device
);
2683 goto failed_port_device_register
;
2685 dbg("%s", "Entering...");
2686 printk(KERN_INFO KBUILD_MODNAME
": " DRIVER_VERSION
":"
2689 /* Register with the usb */
2690 retval
= usb_register(&io_driver
);
2692 dbg("%s", "Leaving...");
2695 usb_serial_deregister(&moschip7840_4port_device
);
2696 failed_port_device_register
:
2700 /****************************************************************************
2702 * Called when the driver is about to be unloaded.
2703 ****************************************************************************/
2704 static void __exit
moschip7840_exit(void)
2707 dbg("%s", " mos7840_exit :entering..........");
2709 usb_deregister(&io_driver
);
2711 usb_serial_deregister(&moschip7840_4port_device
);
2713 dbg("%s", "Entering...");
2716 module_init(moschip7840_init
);
2717 module_exit(moschip7840_exit
);
2719 /* Module information */
2720 MODULE_DESCRIPTION(DRIVER_DESC
);
2721 MODULE_LICENSE("GPL");
2723 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
2724 MODULE_PARM_DESC(debug
, "Debug enabled or not");