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/smp_lock.h>
30 #include <linux/tty.h>
31 #include <linux/tty_driver.h>
32 #include <linux/tty_flip.h>
33 #include <linux/module.h>
34 #include <linux/serial.h>
35 #include <linux/usb.h>
36 #include <linux/usb/serial.h>
37 #include <linux/uaccess.h>
42 #define DRIVER_VERSION "1.3.2"
43 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
46 * 16C50 UART register defines
49 #define LCR_BITS_5 0x00 /* 5 bits/char */
50 #define LCR_BITS_6 0x01 /* 6 bits/char */
51 #define LCR_BITS_7 0x02 /* 7 bits/char */
52 #define LCR_BITS_8 0x03 /* 8 bits/char */
53 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
55 #define LCR_STOP_1 0x00 /* 1 stop bit */
56 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
57 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
58 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
60 #define LCR_PAR_NONE 0x00 /* No parity */
61 #define LCR_PAR_ODD 0x08 /* Odd parity */
62 #define LCR_PAR_EVEN 0x18 /* Even parity */
63 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
64 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
65 #define LCR_PAR_MASK 0x38 /* Mask for parity field */
67 #define LCR_SET_BREAK 0x40 /* Set Break condition */
68 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
70 #define MCR_DTR 0x01 /* Assert DTR */
71 #define MCR_RTS 0x02 /* Assert RTS */
72 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
73 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
74 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
75 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
77 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
78 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
79 #define MOS7840_MSR_RI 0x40 /* Current state of RI */
80 #define MOS7840_MSR_CD 0x80 /* Current state of CD */
83 * Defines used for sending commands to port
86 #define WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */
87 #define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */
89 #define MOS_PORT1 0x0200
90 #define MOS_PORT2 0x0300
91 #define MOS_VENREG 0x0000
92 #define MOS_MAX_PORT 0x02
93 #define MOS_WRITE 0x0E
97 #define MCS_RD_RTYPE 0xC0
98 #define MCS_WR_RTYPE 0x40
99 #define MCS_RDREQ 0x0D
100 #define MCS_WRREQ 0x0E
101 #define MCS_CTRL_TIMEOUT 500
102 #define VENDOR_READ_LENGTH (0x01)
104 #define MAX_NAME_LEN 64
106 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
107 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
109 /* For higher baud Rates use TIOCEXBAUD */
110 #define TIOCEXBAUD 0x5462
112 /* vendor id and device id defines */
114 /* The native mos7840/7820 component */
115 #define USB_VENDOR_ID_MOSCHIP 0x9710
116 #define MOSCHIP_DEVICE_ID_7840 0x7840
117 #define MOSCHIP_DEVICE_ID_7820 0x7820
118 /* The native component can have its vendor/device id's overridden
119 * in vendor-specific implementations. Such devices can be handled
120 * by making a change here, in moschip_port_id_table, and in
121 * moschip_id_table_combined
123 #define USB_VENDOR_ID_BANDB 0x0856
124 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
125 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
126 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29
127 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30
128 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31
129 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32
130 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
131 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
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 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_ATENINTL
, ATENINTL_DEVICE_ID_UC2324
)},
195 {USB_DEVICE(USB_VENDOR_ID_ATENINTL
, ATENINTL_DEVICE_ID_UC2322
)},
196 {} /* terminating entry */
199 static __devinitdata
struct usb_device_id moschip_id_table_combined
[] = {
200 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7840
)},
201 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7820
)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_2
)},
203 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_4
)},
204 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_US9ML2_2
)},
205 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_US9ML2_4
)},
206 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USPTL4_2
)},
207 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USPTL4_4
)},
208 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_2
)},
209 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_4
)},
210 {USB_DEVICE(USB_VENDOR_ID_ATENINTL
, ATENINTL_DEVICE_ID_UC2324
)},
211 {USB_DEVICE(USB_VENDOR_ID_ATENINTL
, ATENINTL_DEVICE_ID_UC2322
)},
212 {} /* terminating entry */
215 MODULE_DEVICE_TABLE(usb
, moschip_id_table_combined
);
217 /* This structure holds all of the local port information */
219 struct moschip_port
{
220 int port_num
; /*Actual port number in the device(1,2,etc) */
221 struct urb
*write_urb
; /* write URB for this port */
222 struct urb
*read_urb
; /* read URB for this port */
224 __u8 shadowLCR
; /* last LCR value received */
225 __u8 shadowMCR
; /* last MCR value received */
229 wait_queue_head_t wait_chase
; /* for handling sleeping while waiting for chase to finish */
230 wait_queue_head_t delta_msr_wait
; /* for handling sleeping while waiting for msr change to happen */
232 struct async_icount icount
;
233 struct usb_serial_port
*port
; /* loop back to the owner of this object */
237 __u8 ControlRegOffset
;
239 /* for processing control URBS in interrupt context */
240 struct urb
*control_urb
;
241 struct usb_ctrlrequest
*dr
;
245 spinlock_t pool_lock
;
246 struct urb
*write_urb_pool
[NUM_URBS
];
255 * mos7840_set_reg_sync
256 * To set the Control register by calling usb_fill_control_urb function
257 * by passing usb_sndctrlpipe function as parameter.
260 static int mos7840_set_reg_sync(struct usb_serial_port
*port
, __u16 reg
,
263 struct usb_device
*dev
= port
->serial
->dev
;
265 dbg("mos7840_set_reg_sync offset is %x, value %x", reg
, val
);
267 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), MCS_WRREQ
,
268 MCS_WR_RTYPE
, val
, reg
, NULL
, 0,
273 * mos7840_get_reg_sync
274 * To set the Uart register by calling usb_fill_control_urb function by
275 * passing usb_rcvctrlpipe function as parameter.
278 static int mos7840_get_reg_sync(struct usb_serial_port
*port
, __u16 reg
,
281 struct usb_device
*dev
= port
->serial
->dev
;
284 ret
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0), MCS_RDREQ
,
285 MCS_RD_RTYPE
, 0, reg
, val
, VENDOR_READ_LENGTH
,
287 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg
, *val
);
288 *val
= (*val
) & 0x00ff;
293 * mos7840_set_uart_reg
294 * To set the Uart register by calling usb_fill_control_urb function by
295 * passing usb_sndctrlpipe function as parameter.
298 static int mos7840_set_uart_reg(struct usb_serial_port
*port
, __u16 reg
,
302 struct usb_device
*dev
= port
->serial
->dev
;
304 /* For the UART control registers, the application number need
306 if (port
->serial
->num_ports
== 4) {
307 val
|= (((__u16
) port
->number
-
308 (__u16
) (port
->serial
->minor
)) + 1) << 8;
309 dbg("mos7840_set_uart_reg application number is %x", val
);
311 if (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) == 0) {
312 val
|= (((__u16
) port
->number
-
313 (__u16
) (port
->serial
->minor
)) + 1) << 8;
314 dbg("mos7840_set_uart_reg application number is %x",
318 (((__u16
) port
->number
-
319 (__u16
) (port
->serial
->minor
)) + 2) << 8;
320 dbg("mos7840_set_uart_reg application number is %x",
324 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), MCS_WRREQ
,
325 MCS_WR_RTYPE
, val
, reg
, NULL
, 0,
331 * mos7840_get_uart_reg
332 * To set the Control register by calling usb_fill_control_urb function
333 * by passing usb_rcvctrlpipe function as parameter.
335 static int mos7840_get_uart_reg(struct usb_serial_port
*port
, __u16 reg
,
338 struct usb_device
*dev
= port
->serial
->dev
;
342 /* dbg("application number is %4x",
343 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
344 /* Wval is same as application number */
345 if (port
->serial
->num_ports
== 4) {
347 (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) +
349 dbg("mos7840_get_uart_reg application number is %x", Wval
);
351 if (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) == 0) {
352 Wval
= (((__u16
) port
->number
-
353 (__u16
) (port
->serial
->minor
)) + 1) << 8;
354 dbg("mos7840_get_uart_reg application number is %x",
357 Wval
= (((__u16
) port
->number
-
358 (__u16
) (port
->serial
->minor
)) + 2) << 8;
359 dbg("mos7840_get_uart_reg application number is %x",
363 ret
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0), MCS_RDREQ
,
364 MCS_RD_RTYPE
, Wval
, reg
, val
, VENDOR_READ_LENGTH
,
366 *val
= (*val
) & 0x00ff;
370 static void mos7840_dump_serial_port(struct moschip_port
*mos7840_port
)
373 dbg("***************************************");
374 dbg("SpRegOffset is %2x", mos7840_port
->SpRegOffset
);
375 dbg("ControlRegOffset is %2x", mos7840_port
->ControlRegOffset
);
376 dbg("DCRRegOffset is %2x", mos7840_port
->DcrRegOffset
);
377 dbg("***************************************");
381 /************************************************************************/
382 /************************************************************************/
383 /* I N T E R F A C E F U N C T I O N S */
384 /* I N T E R F A C E F U N C T I O N S */
385 /************************************************************************/
386 /************************************************************************/
388 static inline void mos7840_set_port_private(struct usb_serial_port
*port
,
389 struct moschip_port
*data
)
391 usb_set_serial_port_data(port
, (void *)data
);
394 static inline struct moschip_port
*mos7840_get_port_private(struct
398 return (struct moschip_port
*)usb_get_serial_port_data(port
);
401 static void mos7840_handle_new_msr(struct moschip_port
*port
, __u8 new_msr
)
403 struct moschip_port
*mos7840_port
;
404 struct async_icount
*icount
;
406 icount
= &mos7840_port
->icount
;
408 (MOS_MSR_DELTA_CTS
| MOS_MSR_DELTA_DSR
| MOS_MSR_DELTA_RI
|
410 icount
= &mos7840_port
->icount
;
412 /* update input line counters */
413 if (new_msr
& MOS_MSR_DELTA_CTS
) {
417 if (new_msr
& MOS_MSR_DELTA_DSR
) {
421 if (new_msr
& MOS_MSR_DELTA_CD
) {
425 if (new_msr
& MOS_MSR_DELTA_RI
) {
432 static void mos7840_handle_new_lsr(struct moschip_port
*port
, __u8 new_lsr
)
434 struct async_icount
*icount
;
436 dbg("%s - %02x", __func__
, new_lsr
);
438 if (new_lsr
& SERIAL_LSR_BI
) {
440 * Parity and Framing errors only count if they
441 * occur exclusive of a break being
444 new_lsr
&= (__u8
) (SERIAL_LSR_OE
| SERIAL_LSR_BI
);
447 /* update input line counters */
448 icount
= &port
->icount
;
449 if (new_lsr
& SERIAL_LSR_BI
) {
453 if (new_lsr
& SERIAL_LSR_OE
) {
457 if (new_lsr
& SERIAL_LSR_PE
) {
461 if (new_lsr
& SERIAL_LSR_FE
) {
467 /************************************************************************/
468 /************************************************************************/
469 /* U S B C A L L B A C K F U N C T I O N S */
470 /* U S B C A L L B A C K F U N C T I O N S */
471 /************************************************************************/
472 /************************************************************************/
474 static void mos7840_control_callback(struct urb
*urb
)
477 struct moschip_port
*mos7840_port
;
480 int status
= urb
->status
;
482 mos7840_port
= urb
->context
;
491 /* this urb is terminated, clean up */
492 dbg("%s - urb shutting down with status: %d", __func__
,
496 dbg("%s - nonzero urb status received: %d", __func__
,
501 dbg("%s urb buffer size is %d", __func__
, urb
->actual_length
);
502 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__
,
503 mos7840_port
->MsrLsr
, mos7840_port
->port_num
);
504 data
= urb
->transfer_buffer
;
505 regval
= (__u8
) data
[0];
506 dbg("%s data is %x", __func__
, regval
);
507 if (mos7840_port
->MsrLsr
== 0)
508 mos7840_handle_new_msr(mos7840_port
, regval
);
509 else if (mos7840_port
->MsrLsr
== 1)
510 mos7840_handle_new_lsr(mos7840_port
, regval
);
513 spin_lock(&mos7840_port
->pool_lock
);
514 if (!mos7840_port
->zombie
)
515 result
= usb_submit_urb(mos7840_port
->int_urb
, GFP_ATOMIC
);
516 spin_unlock(&mos7840_port
->pool_lock
);
518 dev_err(&urb
->dev
->dev
,
519 "%s - Error %d submitting interrupt urb\n",
524 static int mos7840_get_reg(struct moschip_port
*mcs
, __u16 Wval
, __u16 reg
,
527 struct usb_device
*dev
= mcs
->port
->serial
->dev
;
528 struct usb_ctrlrequest
*dr
= mcs
->dr
;
529 unsigned char *buffer
= mcs
->ctrl_buf
;
532 dr
->bRequestType
= MCS_RD_RTYPE
;
533 dr
->bRequest
= MCS_RDREQ
;
534 dr
->wValue
= cpu_to_le16(Wval
); /* 0 */
535 dr
->wIndex
= cpu_to_le16(reg
);
536 dr
->wLength
= cpu_to_le16(2);
538 usb_fill_control_urb(mcs
->control_urb
, dev
, usb_rcvctrlpipe(dev
, 0),
539 (unsigned char *)dr
, buffer
, 2,
540 mos7840_control_callback
, mcs
);
541 mcs
->control_urb
->transfer_buffer_length
= 2;
542 ret
= usb_submit_urb(mcs
->control_urb
, GFP_ATOMIC
);
546 /*****************************************************************************
547 * mos7840_interrupt_callback
548 * this is the callback function for when we have received data on the
549 * interrupt endpoint.
550 *****************************************************************************/
552 static void mos7840_interrupt_callback(struct urb
*urb
)
556 struct moschip_port
*mos7840_port
;
557 struct usb_serial
*serial
;
562 __u16 wval
, wreg
= 0;
563 int status
= urb
->status
;
565 dbg("%s", " : Entering");
574 /* this urb is terminated, clean up */
575 dbg("%s - urb shutting down with status: %d", __func__
,
579 dbg("%s - nonzero urb status received: %d", __func__
,
584 length
= urb
->actual_length
;
585 data
= urb
->transfer_buffer
;
587 serial
= urb
->context
;
589 /* Moschip get 5 bytes
590 * Byte 1 IIR Port 1 (port.number is 0)
591 * Byte 2 IIR Port 2 (port.number is 1)
592 * Byte 3 IIR Port 3 (port.number is 2)
593 * Byte 4 IIR Port 4 (port.number is 3)
594 * Byte 5 FIFO status for both */
596 if (length
&& length
> 5) {
597 dbg("%s", "Wrong data !!!");
601 sp
[0] = (__u8
) data
[0];
602 sp
[1] = (__u8
) data
[1];
603 sp
[2] = (__u8
) data
[2];
604 sp
[3] = (__u8
) data
[3];
607 for (i
= 0; i
< serial
->num_ports
; i
++) {
608 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
610 (((__u16
) serial
->port
[i
]->number
-
611 (__u16
) (serial
->minor
)) + 1) << 8;
612 if (mos7840_port
->open
) {
614 dbg("SP%d No Interrupt !!!", i
);
616 switch (sp
[i
] & 0x0f) {
618 dbg("Serial Port %d: Receiver status error or ", i
);
619 dbg("address bit detected in 9-bit mode");
620 mos7840_port
->MsrLsr
= 1;
621 wreg
= LINE_STATUS_REGISTER
;
624 dbg("Serial Port %d: Modem status change", i
);
625 mos7840_port
->MsrLsr
= 0;
626 wreg
= MODEM_STATUS_REGISTER
;
629 spin_lock(&mos7840_port
->pool_lock
);
630 if (!mos7840_port
->zombie
) {
631 rv
= mos7840_get_reg(mos7840_port
, wval
, wreg
, &Data
);
633 spin_unlock(&mos7840_port
->pool_lock
);
636 spin_unlock(&mos7840_port
->pool_lock
);
641 /* the completion handler for the control urb will resubmit */
644 result
= usb_submit_urb(urb
, GFP_ATOMIC
);
646 dev_err(&urb
->dev
->dev
,
647 "%s - Error %d submitting interrupt urb\n",
652 static int mos7840_port_paranoia_check(struct usb_serial_port
*port
,
653 const char *function
)
656 dbg("%s - port == NULL", function
);
660 dbg("%s - port->serial == NULL", function
);
667 /* Inline functions to check the sanity of a pointer that is passed to us */
668 static int mos7840_serial_paranoia_check(struct usb_serial
*serial
,
669 const char *function
)
672 dbg("%s - serial == NULL", function
);
676 dbg("%s - serial->type == NULL!", function
);
683 static struct usb_serial
*mos7840_get_usb_serial(struct usb_serial_port
*port
,
684 const char *function
)
686 /* if no port was specified, or it fails a paranoia check */
688 mos7840_port_paranoia_check(port
, function
) ||
689 mos7840_serial_paranoia_check(port
->serial
, function
)) {
690 /* then say that we don't have a valid usb_serial thing,
691 * which will end up genrating -ENODEV return values */
698 /*****************************************************************************
699 * mos7840_bulk_in_callback
700 * this is the callback function for when we have received data on the
702 *****************************************************************************/
704 static void mos7840_bulk_in_callback(struct urb
*urb
)
708 struct usb_serial
*serial
;
709 struct usb_serial_port
*port
;
710 struct moschip_port
*mos7840_port
;
711 struct tty_struct
*tty
;
712 int status
= urb
->status
;
714 mos7840_port
= urb
->context
;
716 dbg("%s", "NULL mos7840_port pointer");
721 dbg("nonzero read bulk status received: %d", status
);
722 mos7840_port
->read_urb_busy
= false;
726 port
= (struct usb_serial_port
*)mos7840_port
->port
;
727 if (mos7840_port_paranoia_check(port
, __func__
)) {
728 dbg("%s", "Port Paranoia failed");
729 mos7840_port
->read_urb_busy
= false;
733 serial
= mos7840_get_usb_serial(port
, __func__
);
735 dbg("%s", "Bad serial pointer");
736 mos7840_port
->read_urb_busy
= false;
740 dbg("%s", "Entering... ");
742 data
= urb
->transfer_buffer
;
744 dbg("%s", "Entering ...........");
746 if (urb
->actual_length
) {
747 tty
= tty_port_tty_get(&mos7840_port
->port
->port
);
749 tty_buffer_request_room(tty
, urb
->actual_length
);
750 tty_insert_flip_string(tty
, data
, urb
->actual_length
);
752 tty_flip_buffer_push(tty
);
755 mos7840_port
->icount
.rx
+= urb
->actual_length
;
757 dbg("mos7840_port->icount.rx is %d:",
758 mos7840_port
->icount
.rx
);
761 if (!mos7840_port
->read_urb
) {
762 dbg("%s", "URB KILLED !!!");
763 mos7840_port
->read_urb_busy
= false;
768 mos7840_port
->read_urb
->dev
= serial
->dev
;
770 mos7840_port
->read_urb_busy
= true;
771 retval
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
774 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval
);
775 mos7840_port
->read_urb_busy
= false;
779 /*****************************************************************************
780 * mos7840_bulk_out_data_callback
781 * this is the callback function for when we have finished sending
782 * serial data on the bulk out endpoint.
783 *****************************************************************************/
785 static void mos7840_bulk_out_data_callback(struct urb
*urb
)
787 struct moschip_port
*mos7840_port
;
788 struct tty_struct
*tty
;
789 int status
= urb
->status
;
792 mos7840_port
= urb
->context
;
793 spin_lock(&mos7840_port
->pool_lock
);
794 for (i
= 0; i
< NUM_URBS
; i
++) {
795 if (urb
== mos7840_port
->write_urb_pool
[i
]) {
796 mos7840_port
->busy
[i
] = 0;
800 spin_unlock(&mos7840_port
->pool_lock
);
803 dbg("nonzero write bulk status received:%d", status
);
807 if (mos7840_port_paranoia_check(mos7840_port
->port
, __func__
)) {
808 dbg("%s", "Port Paranoia failed");
812 dbg("%s", "Entering .........");
814 tty
= tty_port_tty_get(&mos7840_port
->port
->port
);
815 if (tty
&& mos7840_port
->open
)
821 /************************************************************************/
822 /* 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 */
823 /************************************************************************/
824 #ifdef MCSSerialProbe
825 static int mos7840_serial_probe(struct usb_serial
*serial
,
826 const struct usb_device_id
*id
)
829 /*need to implement the mode_reg reading and updating\
830 structures usb_serial_ device_type\
831 (i.e num_ports, num_bulkin,bulkout etc) */
832 /* Also we can update the changes attach */
837 /*****************************************************************************
839 * this function is called by the tty driver when a port is opened
840 * If successful, we return 0
841 * Otherwise we return a negative error number.
842 *****************************************************************************/
844 static int mos7840_open(struct tty_struct
*tty
, struct usb_serial_port
*port
)
848 struct usb_serial
*serial
;
852 struct moschip_port
*mos7840_port
;
853 struct moschip_port
*port0
;
855 dbg ("%s enter", __func__
);
857 if (mos7840_port_paranoia_check(port
, __func__
)) {
858 dbg("%s", "Port Paranoia failed");
862 serial
= port
->serial
;
864 if (mos7840_serial_paranoia_check(serial
, __func__
)) {
865 dbg("%s", "Serial Paranoia failed");
869 mos7840_port
= mos7840_get_port_private(port
);
870 port0
= mos7840_get_port_private(serial
->port
[0]);
872 if (mos7840_port
== NULL
|| port0
== NULL
)
875 usb_clear_halt(serial
->dev
, port
->write_urb
->pipe
);
876 usb_clear_halt(serial
->dev
, port
->read_urb
->pipe
);
879 /* Initialising the write urb pool */
880 for (j
= 0; j
< NUM_URBS
; ++j
) {
881 urb
= usb_alloc_urb(0, GFP_KERNEL
);
882 mos7840_port
->write_urb_pool
[j
] = urb
;
885 dev_err(&port
->dev
, "No more urbs???\n");
889 urb
->transfer_buffer
= kmalloc(URB_TRANSFER_BUFFER_SIZE
,
891 if (!urb
->transfer_buffer
) {
893 mos7840_port
->write_urb_pool
[j
] = NULL
;
895 "%s-out of memory for urb buffers.\n",
901 /*****************************************************************************
902 * Initialize MCS7840 -- Write Init values to corresponding Registers
910 * 0x08 : SP1/2 Control Reg
911 *****************************************************************************/
913 /* NEED to check the following Block */
916 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
, &Data
);
918 dbg("Reading Spreg failed");
922 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
924 dbg("writing Spreg failed");
929 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
931 dbg("writing Spreg failed");
934 /* End of block to be checked */
937 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
940 dbg("Reading Controlreg failed");
943 Data
|= 0x08; /* Driver done bit */
944 Data
|= 0x20; /* rx_disable */
945 status
= mos7840_set_reg_sync(port
,
946 mos7840_port
->ControlRegOffset
, Data
);
948 dbg("writing Controlreg failed");
951 /* do register settings here */
952 /* Set all regs to the device default values. */
953 /***********************************
954 * First Disable all interrupts.
955 ***********************************/
957 status
= mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
959 dbg("disabling interrupts failed");
962 /* Set FIFO_CONTROL_REGISTER to the default value */
964 status
= mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
966 dbg("Writing FIFO_CONTROL_REGISTER failed");
971 status
= mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
973 dbg("Writing FIFO_CONTROL_REGISTER failed");
978 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
979 mos7840_port
->shadowLCR
= Data
;
982 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
983 mos7840_port
->shadowMCR
= Data
;
986 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
987 mos7840_port
->shadowLCR
= Data
;
989 Data
|= SERIAL_LCR_DLAB
; /* data latch enable in LCR 0x80 */
990 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
993 status
= mos7840_set_uart_reg(port
, DIVISOR_LATCH_LSB
, Data
);
996 status
= mos7840_set_uart_reg(port
, DIVISOR_LATCH_MSB
, Data
);
999 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
1001 Data
= Data
& ~SERIAL_LCR_DLAB
;
1002 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1003 mos7840_port
->shadowLCR
= Data
;
1005 /* clearing Bulkin and Bulkout Fifo */
1007 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
, &Data
);
1010 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
1012 Data
= Data
& ~0x0c;
1013 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
1014 /* Finally enable all interrupts */
1016 status
= mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
1018 /* clearing rx_disable */
1020 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1022 Data
= Data
& ~0x20;
1023 status
= mos7840_set_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1028 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1031 status
= mos7840_set_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1034 /* Check to see if we've set up our endpoint info yet *
1035 * (can't set it up in mos7840_startup as the structures *
1036 * were not set up at that time.) */
1037 if (port0
->open_ports
== 1) {
1038 if (serial
->port
[0]->interrupt_in_buffer
== NULL
) {
1039 /* set up interrupt urb */
1040 usb_fill_int_urb(serial
->port
[0]->interrupt_in_urb
,
1042 usb_rcvintpipe(serial
->dev
,
1043 serial
->port
[0]->interrupt_in_endpointAddress
),
1044 serial
->port
[0]->interrupt_in_buffer
,
1045 serial
->port
[0]->interrupt_in_urb
->
1046 transfer_buffer_length
,
1047 mos7840_interrupt_callback
,
1049 serial
->port
[0]->interrupt_in_urb
->interval
);
1051 /* start interrupt read for mos7840 *
1052 * will continue as long as mos7840 is connected */
1055 usb_submit_urb(serial
->port
[0]->interrupt_in_urb
,
1058 dev_err(&port
->dev
, "%s - Error %d submitting "
1059 "interrupt urb\n", __func__
, response
);
1066 /* see if we've set up our endpoint info yet *
1067 * (can't set it up in mos7840_startup as the *
1068 * structures were not set up at that time.) */
1070 dbg("port number is %d", port
->number
);
1071 dbg("serial number is %d", port
->serial
->minor
);
1072 dbg("Bulkin endpoint is %d", port
->bulk_in_endpointAddress
);
1073 dbg("BulkOut endpoint is %d", port
->bulk_out_endpointAddress
);
1074 dbg("Interrupt endpoint is %d", port
->interrupt_in_endpointAddress
);
1075 dbg("port's number in the device is %d", mos7840_port
->port_num
);
1076 mos7840_port
->read_urb
= port
->read_urb
;
1078 /* set up our bulk in urb */
1080 usb_fill_bulk_urb(mos7840_port
->read_urb
,
1082 usb_rcvbulkpipe(serial
->dev
,
1083 port
->bulk_in_endpointAddress
),
1084 port
->bulk_in_buffer
,
1085 mos7840_port
->read_urb
->transfer_buffer_length
,
1086 mos7840_bulk_in_callback
, mos7840_port
);
1088 dbg("mos7840_open: bulkin endpoint is %d",
1089 port
->bulk_in_endpointAddress
);
1090 mos7840_port
->read_urb_busy
= true;
1091 response
= usb_submit_urb(mos7840_port
->read_urb
, GFP_KERNEL
);
1093 dev_err(&port
->dev
, "%s - Error %d submitting control urb\n",
1094 __func__
, response
);
1095 mos7840_port
->read_urb_busy
= false;
1098 /* initialize our wait queues */
1099 init_waitqueue_head(&mos7840_port
->wait_chase
);
1100 init_waitqueue_head(&mos7840_port
->delta_msr_wait
);
1102 /* initialize our icount structure */
1103 memset(&(mos7840_port
->icount
), 0x00, sizeof(mos7840_port
->icount
));
1105 /* initialize our port settings */
1106 /* Must set to enable ints! */
1107 mos7840_port
->shadowMCR
= MCR_MASTER_IE
;
1108 /* send a open port command */
1109 mos7840_port
->open
= 1;
1110 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1111 mos7840_port
->icount
.tx
= 0;
1112 mos7840_port
->icount
.rx
= 0;
1114 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p",
1115 serial
, mos7840_port
, port
);
1117 dbg ("%s leave", __func__
);
1123 /*****************************************************************************
1124 * mos7840_chars_in_buffer
1125 * this function is called by the tty driver when it wants to know how many
1126 * bytes of data we currently have outstanding in the port (data that has
1127 * been written, but hasn't made it out the port yet)
1128 * If successful, we return the number of bytes left to be written in the
1130 * Otherwise we return zero.
1131 *****************************************************************************/
1133 static int mos7840_chars_in_buffer(struct tty_struct
*tty
)
1135 struct usb_serial_port
*port
= tty
->driver_data
;
1138 unsigned long flags
;
1139 struct moschip_port
*mos7840_port
;
1141 dbg("%s", " mos7840_chars_in_buffer:entering ...........");
1143 if (mos7840_port_paranoia_check(port
, __func__
)) {
1144 dbg("%s", "Invalid port");
1148 mos7840_port
= mos7840_get_port_private(port
);
1149 if (mos7840_port
== NULL
) {
1150 dbg("%s", "mos7840_break:leaving ...........");
1154 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1155 for (i
= 0; i
< NUM_URBS
; ++i
)
1156 if (mos7840_port
->busy
[i
])
1157 chars
+= URB_TRANSFER_BUFFER_SIZE
;
1158 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1159 dbg("%s - returns %d", __func__
, chars
);
1164 /*****************************************************************************
1166 * this function is called by the tty driver when a port is closed
1167 *****************************************************************************/
1169 static void mos7840_close(struct usb_serial_port
*port
)
1171 struct usb_serial
*serial
;
1172 struct moschip_port
*mos7840_port
;
1173 struct moschip_port
*port0
;
1177 dbg("%s", "mos7840_close:entering...");
1179 if (mos7840_port_paranoia_check(port
, __func__
)) {
1180 dbg("%s", "Port Paranoia failed");
1184 serial
= mos7840_get_usb_serial(port
, __func__
);
1186 dbg("%s", "Serial Paranoia failed");
1190 mos7840_port
= mos7840_get_port_private(port
);
1191 port0
= mos7840_get_port_private(serial
->port
[0]);
1193 if (mos7840_port
== NULL
|| port0
== NULL
)
1196 for (j
= 0; j
< NUM_URBS
; ++j
)
1197 usb_kill_urb(mos7840_port
->write_urb_pool
[j
]);
1199 /* Freeing Write URBs */
1200 for (j
= 0; j
< NUM_URBS
; ++j
) {
1201 if (mos7840_port
->write_urb_pool
[j
]) {
1202 if (mos7840_port
->write_urb_pool
[j
]->transfer_buffer
)
1203 kfree(mos7840_port
->write_urb_pool
[j
]->
1206 usb_free_urb(mos7840_port
->write_urb_pool
[j
]);
1210 /* While closing port, shutdown all bulk read, write *
1211 * and interrupt read if they exists */
1213 if (mos7840_port
->write_urb
) {
1214 dbg("%s", "Shutdown bulk write");
1215 usb_kill_urb(mos7840_port
->write_urb
);
1217 if (mos7840_port
->read_urb
) {
1218 dbg("%s", "Shutdown bulk read");
1219 usb_kill_urb(mos7840_port
->read_urb
);
1220 mos7840_port
->read_urb_busy
= false;
1222 if ((&mos7840_port
->control_urb
)) {
1223 dbg("%s", "Shutdown control read");
1224 /*/ usb_kill_urb (mos7840_port->control_urb); */
1227 /* if(mos7840_port->ctrl_buf != NULL) */
1228 /* kfree(mos7840_port->ctrl_buf); */
1229 port0
->open_ports
--;
1230 dbg("mos7840_num_open_ports in close%d:in port%d",
1231 port0
->open_ports
, port
->number
);
1232 if (port0
->open_ports
== 0) {
1233 if (serial
->port
[0]->interrupt_in_urb
) {
1234 dbg("%s", "Shutdown interrupt_in_urb");
1235 usb_kill_urb(serial
->port
[0]->interrupt_in_urb
);
1239 if (mos7840_port
->write_urb
) {
1240 /* if this urb had a transfer buffer already (old tx) free it */
1241 if (mos7840_port
->write_urb
->transfer_buffer
!= NULL
)
1242 kfree(mos7840_port
->write_urb
->transfer_buffer
);
1243 usb_free_urb(mos7840_port
->write_urb
);
1247 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
1250 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
1252 mos7840_port
->open
= 0;
1254 dbg("%s", "Leaving ............");
1257 /************************************************************************
1259 * mos7840_block_until_chase_response
1261 * This function will block the close until one of the following:
1262 * 1. Response to our Chase comes from mos7840
1263 * 2. A timeout of 10 seconds without activity has expired
1264 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1266 ************************************************************************/
1268 static void mos7840_block_until_chase_response(struct tty_struct
*tty
,
1269 struct moschip_port
*mos7840_port
)
1271 int timeout
= 1 * HZ
;
1276 count
= mos7840_chars_in_buffer(tty
);
1278 /* Check for Buffer status */
1282 /* Block the thread for a while */
1283 interruptible_sleep_on_timeout(&mos7840_port
->wait_chase
,
1285 /* No activity.. count down section */
1288 dbg("%s - TIMEOUT", __func__
);
1291 /* Reset timeout value back to seconds */
1298 /*****************************************************************************
1300 * this function sends a break to the port
1301 *****************************************************************************/
1302 static void mos7840_break(struct tty_struct
*tty
, int break_state
)
1304 struct usb_serial_port
*port
= tty
->driver_data
;
1306 struct usb_serial
*serial
;
1307 struct moschip_port
*mos7840_port
;
1309 dbg("%s", "Entering ...........");
1310 dbg("mos7840_break: Start");
1312 if (mos7840_port_paranoia_check(port
, __func__
)) {
1313 dbg("%s", "Port Paranoia failed");
1317 serial
= mos7840_get_usb_serial(port
, __func__
);
1319 dbg("%s", "Serial Paranoia failed");
1323 mos7840_port
= mos7840_get_port_private(port
);
1325 if (mos7840_port
== NULL
)
1329 /* flush and block until tx is empty */
1330 mos7840_block_until_chase_response(tty
, mos7840_port
);
1332 if (break_state
== -1)
1333 data
= mos7840_port
->shadowLCR
| LCR_SET_BREAK
;
1335 data
= mos7840_port
->shadowLCR
& ~LCR_SET_BREAK
;
1337 /* FIXME: no locking on shadowLCR anywhere in driver */
1338 mos7840_port
->shadowLCR
= data
;
1339 dbg("mcs7840_break mos7840_port->shadowLCR is %x",
1340 mos7840_port
->shadowLCR
);
1341 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
,
1342 mos7840_port
->shadowLCR
);
1347 /*****************************************************************************
1348 * mos7840_write_room
1349 * this function is called by the tty driver when it wants to know how many
1350 * bytes of data we can accept for a specific port.
1351 * If successful, we return the amount of room that we have for this port
1352 * Otherwise we return a negative error number.
1353 *****************************************************************************/
1355 static int mos7840_write_room(struct tty_struct
*tty
)
1357 struct usb_serial_port
*port
= tty
->driver_data
;
1360 unsigned long flags
;
1361 struct moschip_port
*mos7840_port
;
1363 dbg("%s", " mos7840_write_room:entering ...........");
1365 if (mos7840_port_paranoia_check(port
, __func__
)) {
1366 dbg("%s", "Invalid port");
1367 dbg("%s", " mos7840_write_room:leaving ...........");
1371 mos7840_port
= mos7840_get_port_private(port
);
1372 if (mos7840_port
== NULL
) {
1373 dbg("%s", "mos7840_break:leaving ...........");
1377 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1378 for (i
= 0; i
< NUM_URBS
; ++i
) {
1379 if (!mos7840_port
->busy
[i
])
1380 room
+= URB_TRANSFER_BUFFER_SIZE
;
1382 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1384 room
= (room
== 0) ? 0 : room
- URB_TRANSFER_BUFFER_SIZE
+ 1;
1385 dbg("%s - returns %d", __func__
, room
);
1390 /*****************************************************************************
1392 * this function is called by the tty driver when data should be written to
1394 * If successful, we return the number of bytes written, otherwise we
1395 * return a negative error number.
1396 *****************************************************************************/
1398 static int mos7840_write(struct tty_struct
*tty
, struct usb_serial_port
*port
,
1399 const unsigned char *data
, int count
)
1405 unsigned long flags
;
1407 struct moschip_port
*mos7840_port
;
1408 struct usb_serial
*serial
;
1411 const unsigned char *current_position
= data
;
1412 unsigned char *data1
;
1413 dbg("%s", "entering ...........");
1414 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1415 mos7840_port->shadowLCR); */
1419 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
1420 mos7840_port
->shadowLCR
= Data
;
1421 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data
);
1422 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1423 mos7840_port
->shadowLCR
);
1426 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1427 /* mos7840_port->shadowLCR=Data;//Need to add later */
1429 Data
|= SERIAL_LCR_DLAB
; /* data latch enable in LCR 0x80 */
1430 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1433 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1435 status
= mos7840_get_uart_reg(port
, DIVISOR_LATCH_LSB
, &Data
);
1436 dbg("mos7840_write:DLL value is %x", Data
);
1439 status
= mos7840_get_uart_reg(port
, DIVISOR_LATCH_MSB
, &Data
);
1440 dbg("mos7840_write:DLM value is %x", Data
);
1442 Data
= Data
& ~SERIAL_LCR_DLAB
;
1443 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1444 mos7840_port
->shadowLCR
);
1445 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1448 if (mos7840_port_paranoia_check(port
, __func__
)) {
1449 dbg("%s", "Port Paranoia failed");
1453 serial
= port
->serial
;
1454 if (mos7840_serial_paranoia_check(serial
, __func__
)) {
1455 dbg("%s", "Serial Paranoia failed");
1459 mos7840_port
= mos7840_get_port_private(port
);
1460 if (mos7840_port
== NULL
) {
1461 dbg("%s", "mos7840_port is NULL");
1465 /* try to find a free urb in the list */
1468 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1469 for (i
= 0; i
< NUM_URBS
; ++i
) {
1470 if (!mos7840_port
->busy
[i
]) {
1471 mos7840_port
->busy
[i
] = 1;
1472 urb
= mos7840_port
->write_urb_pool
[i
];
1477 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1480 dbg("%s - no more free urbs", __func__
);
1484 if (urb
->transfer_buffer
== NULL
) {
1485 urb
->transfer_buffer
=
1486 kmalloc(URB_TRANSFER_BUFFER_SIZE
, GFP_KERNEL
);
1488 if (urb
->transfer_buffer
== NULL
) {
1489 dev_err(&port
->dev
, "%s no more kernel memory...\n",
1494 transfer_size
= min(count
, URB_TRANSFER_BUFFER_SIZE
);
1496 memcpy(urb
->transfer_buffer
, current_position
, transfer_size
);
1498 /* fill urb with data and submit */
1499 usb_fill_bulk_urb(urb
,
1501 usb_sndbulkpipe(serial
->dev
,
1502 port
->bulk_out_endpointAddress
),
1503 urb
->transfer_buffer
,
1505 mos7840_bulk_out_data_callback
, mos7840_port
);
1507 data1
= urb
->transfer_buffer
;
1508 dbg("bulkout endpoint is %d", port
->bulk_out_endpointAddress
);
1510 /* send it down the pipe */
1511 status
= usb_submit_urb(urb
, GFP_ATOMIC
);
1514 mos7840_port
->busy
[i
] = 0;
1515 dev_err(&port
->dev
, "%s - usb_submit_urb(write bulk) failed "
1516 "with status = %d\n", __func__
, status
);
1517 bytes_sent
= status
;
1520 bytes_sent
= transfer_size
;
1521 mos7840_port
->icount
.tx
+= transfer_size
;
1523 dbg("mos7840_port->icount.tx is %d:", mos7840_port
->icount
.tx
);
1529 /*****************************************************************************
1531 * this function is called by the tty driver when it wants to stop the data
1532 * being read from the port.
1533 *****************************************************************************/
1535 static void mos7840_throttle(struct tty_struct
*tty
)
1537 struct usb_serial_port
*port
= tty
->driver_data
;
1538 struct moschip_port
*mos7840_port
;
1541 if (mos7840_port_paranoia_check(port
, __func__
)) {
1542 dbg("%s", "Invalid port");
1546 dbg("- port %d", port
->number
);
1548 mos7840_port
= mos7840_get_port_private(port
);
1550 if (mos7840_port
== NULL
)
1553 if (!mos7840_port
->open
) {
1554 dbg("%s", "port not opened");
1558 dbg("%s", "Entering ..........");
1560 /* if we are implementing XON/XOFF, send the stop character */
1562 unsigned char stop_char
= STOP_CHAR(tty
);
1563 status
= mos7840_write(tty
, port
, &stop_char
, 1);
1567 /* if we are implementing RTS/CTS, toggle that line */
1568 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1569 mos7840_port
->shadowMCR
&= ~MCR_RTS
;
1570 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1571 mos7840_port
->shadowMCR
);
1579 /*****************************************************************************
1580 * mos7840_unthrottle
1581 * this function is called by the tty driver when it wants to resume
1582 * the data being read from the port (called after mos7840_throttle is
1584 *****************************************************************************/
1585 static void mos7840_unthrottle(struct tty_struct
*tty
)
1587 struct usb_serial_port
*port
= tty
->driver_data
;
1589 struct moschip_port
*mos7840_port
= mos7840_get_port_private(port
);
1591 if (mos7840_port_paranoia_check(port
, __func__
)) {
1592 dbg("%s", "Invalid port");
1596 if (mos7840_port
== NULL
)
1599 if (!mos7840_port
->open
) {
1600 dbg("%s - port not opened", __func__
);
1604 dbg("%s", "Entering ..........");
1606 /* if we are implementing XON/XOFF, send the start character */
1608 unsigned char start_char
= START_CHAR(tty
);
1609 status
= mos7840_write(tty
, port
, &start_char
, 1);
1614 /* if we are implementing RTS/CTS, toggle that line */
1615 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1616 mos7840_port
->shadowMCR
|= MCR_RTS
;
1617 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1618 mos7840_port
->shadowMCR
);
1624 static int mos7840_tiocmget(struct tty_struct
*tty
, struct file
*file
)
1626 struct usb_serial_port
*port
= tty
->driver_data
;
1627 struct moschip_port
*mos7840_port
;
1628 unsigned int result
;
1632 mos7840_port
= mos7840_get_port_private(port
);
1634 dbg("%s - port %d", __func__
, port
->number
);
1636 if (mos7840_port
== NULL
)
1639 status
= mos7840_get_uart_reg(port
, MODEM_STATUS_REGISTER
, &msr
);
1640 status
= mos7840_get_uart_reg(port
, MODEM_CONTROL_REGISTER
, &mcr
);
1641 result
= ((mcr
& MCR_DTR
) ? TIOCM_DTR
: 0)
1642 | ((mcr
& MCR_RTS
) ? TIOCM_RTS
: 0)
1643 | ((mcr
& MCR_LOOPBACK
) ? TIOCM_LOOP
: 0)
1644 | ((msr
& MOS7840_MSR_CTS
) ? TIOCM_CTS
: 0)
1645 | ((msr
& MOS7840_MSR_CD
) ? TIOCM_CAR
: 0)
1646 | ((msr
& MOS7840_MSR_RI
) ? TIOCM_RI
: 0)
1647 | ((msr
& MOS7840_MSR_DSR
) ? TIOCM_DSR
: 0);
1649 dbg("%s - 0x%04X", __func__
, result
);
1654 static int mos7840_tiocmset(struct tty_struct
*tty
, struct file
*file
,
1655 unsigned int set
, unsigned int clear
)
1657 struct usb_serial_port
*port
= tty
->driver_data
;
1658 struct moschip_port
*mos7840_port
;
1662 dbg("%s - port %d", __func__
, port
->number
);
1664 mos7840_port
= mos7840_get_port_private(port
);
1666 if (mos7840_port
== NULL
)
1669 /* FIXME: What locks the port registers ? */
1670 mcr
= mos7840_port
->shadowMCR
;
1671 if (clear
& TIOCM_RTS
)
1673 if (clear
& TIOCM_DTR
)
1675 if (clear
& TIOCM_LOOP
)
1676 mcr
&= ~MCR_LOOPBACK
;
1678 if (set
& TIOCM_RTS
)
1680 if (set
& TIOCM_DTR
)
1682 if (set
& TIOCM_LOOP
)
1683 mcr
|= MCR_LOOPBACK
;
1685 mos7840_port
->shadowMCR
= mcr
;
1687 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, mcr
);
1689 dbg("setting MODEM_CONTROL_REGISTER Failed");
1696 /*****************************************************************************
1697 * mos7840_calc_baud_rate_divisor
1698 * this function calculates the proper baud rate divisor for the specified
1700 *****************************************************************************/
1701 static int mos7840_calc_baud_rate_divisor(int baudRate
, int *divisor
,
1705 dbg("%s - %d", __func__
, baudRate
);
1707 if (baudRate
<= 115200) {
1708 *divisor
= 115200 / baudRate
;
1711 if ((baudRate
> 115200) && (baudRate
<= 230400)) {
1712 *divisor
= 230400 / baudRate
;
1713 *clk_sel_val
= 0x10;
1714 } else if ((baudRate
> 230400) && (baudRate
<= 403200)) {
1715 *divisor
= 403200 / baudRate
;
1716 *clk_sel_val
= 0x20;
1717 } else if ((baudRate
> 403200) && (baudRate
<= 460800)) {
1718 *divisor
= 460800 / baudRate
;
1719 *clk_sel_val
= 0x30;
1720 } else if ((baudRate
> 460800) && (baudRate
<= 806400)) {
1721 *divisor
= 806400 / baudRate
;
1722 *clk_sel_val
= 0x40;
1723 } else if ((baudRate
> 806400) && (baudRate
<= 921600)) {
1724 *divisor
= 921600 / baudRate
;
1725 *clk_sel_val
= 0x50;
1726 } else if ((baudRate
> 921600) && (baudRate
<= 1572864)) {
1727 *divisor
= 1572864 / baudRate
;
1728 *clk_sel_val
= 0x60;
1729 } else if ((baudRate
> 1572864) && (baudRate
<= 3145728)) {
1730 *divisor
= 3145728 / baudRate
;
1731 *clk_sel_val
= 0x70;
1737 for (i
= 0; i
< ARRAY_SIZE(mos7840_divisor_table
); i
++) {
1738 if (mos7840_divisor_table
[i
].BaudRate
== baudrate
) {
1739 *divisor
= mos7840_divisor_table
[i
].Divisor
;
1744 /* After trying for all the standard baud rates *
1745 * Try calculating the divisor for this baud rate */
1747 if (baudrate
> 75 && baudrate
< 230400) {
1748 /* get the divisor */
1749 custom
= (__u16
) (230400L / baudrate
);
1751 /* Check for round off */
1752 round1
= (__u16
) (2304000L / baudrate
);
1753 round
= (__u16
) (round1
- (custom
* 10));
1758 dbg(" Baud %d = %d", baudrate
, custom
);
1762 dbg("%s", " Baud calculation Failed...");
1767 /*****************************************************************************
1768 * mos7840_send_cmd_write_baud_rate
1769 * this function sends the proper command to change the baud rate of the
1771 *****************************************************************************/
1773 static int mos7840_send_cmd_write_baud_rate(struct moschip_port
*mos7840_port
,
1779 unsigned char number
;
1781 struct usb_serial_port
*port
;
1783 if (mos7840_port
== NULL
)
1786 port
= (struct usb_serial_port
*)mos7840_port
->port
;
1787 if (mos7840_port_paranoia_check(port
, __func__
)) {
1788 dbg("%s", "Invalid port");
1792 if (mos7840_serial_paranoia_check(port
->serial
, __func__
)) {
1793 dbg("%s", "Invalid Serial");
1797 dbg("%s", "Entering ..........");
1799 number
= mos7840_port
->port
->number
- mos7840_port
->port
->serial
->minor
;
1801 dbg("%s - port = %d, baud = %d", __func__
,
1802 mos7840_port
->port
->number
, baudRate
);
1803 /* reset clk_uart_sel in spregOffset */
1804 if (baudRate
> 115200) {
1805 #ifdef HW_flow_control
1806 /* NOTE: need to see the pther register to modify */
1807 /* setting h/w flow control bit to 1 */
1809 mos7840_port
->shadowMCR
= Data
;
1810 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1813 dbg("Writing spreg failed in set_serial_baud");
1819 #ifdef HW_flow_control
1820 / *setting h
/w flow control bit to
0 */
1822 mos7840_port
->shadowMCR
= Data
;
1823 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1826 dbg("Writing spreg failed in set_serial_baud");
1833 if (1) { /* baudRate <= 115200) */
1836 status
= mos7840_calc_baud_rate_divisor(baudRate
, &divisor
,
1838 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
,
1841 dbg("reading spreg failed in set_serial_baud");
1844 Data
= (Data
& 0x8f) | clk_sel_val
;
1845 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
,
1848 dbg("Writing spreg failed in set_serial_baud");
1851 /* Calculate the Divisor */
1854 dev_err(&port
->dev
, "%s - bad baud rate\n", __func__
);
1857 /* Enable access to divisor latch */
1858 Data
= mos7840_port
->shadowLCR
| SERIAL_LCR_DLAB
;
1859 mos7840_port
->shadowLCR
= Data
;
1860 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1862 /* Write the divisor */
1863 Data
= (unsigned char)(divisor
& 0xff);
1864 dbg("set_serial_baud Value to write DLL is %x", Data
);
1865 mos7840_set_uart_reg(port
, DIVISOR_LATCH_LSB
, Data
);
1867 Data
= (unsigned char)((divisor
& 0xff00) >> 8);
1868 dbg("set_serial_baud Value to write DLM is %x", Data
);
1869 mos7840_set_uart_reg(port
, DIVISOR_LATCH_MSB
, Data
);
1871 /* Disable access to divisor latch */
1872 Data
= mos7840_port
->shadowLCR
& ~SERIAL_LCR_DLAB
;
1873 mos7840_port
->shadowLCR
= Data
;
1874 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1880 /*****************************************************************************
1881 * mos7840_change_port_settings
1882 * This routine is called to set the UART on the device to match
1883 * the specified new settings.
1884 *****************************************************************************/
1886 static void mos7840_change_port_settings(struct tty_struct
*tty
,
1887 struct moschip_port
*mos7840_port
, struct ktermios
*old_termios
)
1897 struct usb_serial_port
*port
;
1898 struct usb_serial
*serial
;
1900 if (mos7840_port
== NULL
)
1903 port
= (struct usb_serial_port
*)mos7840_port
->port
;
1905 if (mos7840_port_paranoia_check(port
, __func__
)) {
1906 dbg("%s", "Invalid port");
1910 if (mos7840_serial_paranoia_check(port
->serial
, __func__
)) {
1911 dbg("%s", "Invalid Serial");
1915 serial
= port
->serial
;
1917 dbg("%s - port %d", __func__
, mos7840_port
->port
->number
);
1919 if (!mos7840_port
->open
) {
1920 dbg("%s - port not opened", __func__
);
1924 dbg("%s", "Entering ..........");
1928 lParity
= LCR_PAR_NONE
;
1930 cflag
= tty
->termios
->c_cflag
;
1931 iflag
= tty
->termios
->c_iflag
;
1933 /* Change the number of bits */
1934 if (cflag
& CSIZE
) {
1935 switch (cflag
& CSIZE
) {
1953 /* Change the Parity bit */
1954 if (cflag
& PARENB
) {
1955 if (cflag
& PARODD
) {
1956 lParity
= LCR_PAR_ODD
;
1957 dbg("%s - parity = odd", __func__
);
1959 lParity
= LCR_PAR_EVEN
;
1960 dbg("%s - parity = even", __func__
);
1964 dbg("%s - parity = none", __func__
);
1968 lParity
= lParity
| 0x20;
1970 /* Change the Stop bit */
1971 if (cflag
& CSTOPB
) {
1973 dbg("%s - stop bits = 2", __func__
);
1976 dbg("%s - stop bits = 1", __func__
);
1979 /* Update the LCR with the correct value */
1980 mos7840_port
->shadowLCR
&=
1981 ~(LCR_BITS_MASK
| LCR_STOP_MASK
| LCR_PAR_MASK
);
1982 mos7840_port
->shadowLCR
|= (lData
| lParity
| lStop
);
1984 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x",
1985 mos7840_port
->shadowLCR
);
1986 /* Disable Interrupts */
1988 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
1991 mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
1994 mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
1996 /* Send the updated LCR value to the mos7840 */
1997 Data
= mos7840_port
->shadowLCR
;
1999 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
2002 mos7840_port
->shadowMCR
= Data
;
2003 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2005 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2007 /* set up the MCR register and send it to the mos7840 */
2009 mos7840_port
->shadowMCR
= MCR_MASTER_IE
;
2011 mos7840_port
->shadowMCR
|= (MCR_DTR
| MCR_RTS
);
2013 if (cflag
& CRTSCTS
)
2014 mos7840_port
->shadowMCR
|= (MCR_XON_ANY
);
2016 mos7840_port
->shadowMCR
&= ~(MCR_XON_ANY
);
2018 Data
= mos7840_port
->shadowMCR
;
2019 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2021 /* Determine divisor based on baud rate */
2022 baud
= tty_get_baud_rate(tty
);
2025 /* pick a default, any default... */
2026 dbg("%s", "Picked default baud...");
2030 dbg("%s - baud rate = %d", __func__
, baud
);
2031 status
= mos7840_send_cmd_write_baud_rate(mos7840_port
, baud
);
2033 /* Enable Interrupts */
2035 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
2037 if (mos7840_port
->read_urb_busy
== false) {
2038 mos7840_port
->read_urb
->dev
= serial
->dev
;
2039 mos7840_port
->read_urb_busy
= true;
2040 status
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
2042 dbg("usb_submit_urb(read bulk) failed, status = %d",
2044 mos7840_port
->read_urb_busy
= false;
2047 wake_up(&mos7840_port
->delta_msr_wait
);
2048 mos7840_port
->delta_msr_cond
= 1;
2049 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x",
2050 mos7840_port
->shadowLCR
);
2055 /*****************************************************************************
2056 * mos7840_set_termios
2057 * this function is called by the tty driver when it wants to change
2058 * the termios structure
2059 *****************************************************************************/
2061 static void mos7840_set_termios(struct tty_struct
*tty
,
2062 struct usb_serial_port
*port
,
2063 struct ktermios
*old_termios
)
2067 struct usb_serial
*serial
;
2068 struct moschip_port
*mos7840_port
;
2069 dbg("mos7840_set_termios: START");
2070 if (mos7840_port_paranoia_check(port
, __func__
)) {
2071 dbg("%s", "Invalid port");
2075 serial
= port
->serial
;
2077 if (mos7840_serial_paranoia_check(serial
, __func__
)) {
2078 dbg("%s", "Invalid Serial");
2082 mos7840_port
= mos7840_get_port_private(port
);
2084 if (mos7840_port
== NULL
)
2087 if (!mos7840_port
->open
) {
2088 dbg("%s - port not opened", __func__
);
2092 dbg("%s", "setting termios - ");
2094 cflag
= tty
->termios
->c_cflag
;
2096 dbg("%s - clfag %08x iflag %08x", __func__
,
2097 tty
->termios
->c_cflag
, RELEVANT_IFLAG(tty
->termios
->c_iflag
));
2098 dbg("%s - old clfag %08x old iflag %08x", __func__
,
2099 old_termios
->c_cflag
, RELEVANT_IFLAG(old_termios
->c_iflag
));
2100 dbg("%s - port %d", __func__
, port
->number
);
2102 /* change the port settings to the new ones specified */
2104 mos7840_change_port_settings(tty
, mos7840_port
, old_termios
);
2106 if (!mos7840_port
->read_urb
) {
2107 dbg("%s", "URB KILLED !!!!!");
2111 if (mos7840_port
->read_urb_busy
== false) {
2112 mos7840_port
->read_urb
->dev
= serial
->dev
;
2113 mos7840_port
->read_urb_busy
= true;
2114 status
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
2116 dbg("usb_submit_urb(read bulk) failed, status = %d",
2118 mos7840_port
->read_urb_busy
= false;
2124 /*****************************************************************************
2125 * mos7840_get_lsr_info - get line status register info
2127 * Purpose: Let user call ioctl() to get info when the UART physically
2128 * is emptied. On bus types like RS485, the transmitter must
2129 * release the bus after transmitting. This must be done when
2130 * the transmit shift register is empty, not be done when the
2131 * transmit holding register is empty. This functionality
2132 * allows an RS485 driver to be written in user space.
2133 *****************************************************************************/
2135 static int mos7840_get_lsr_info(struct tty_struct
*tty
,
2136 unsigned int __user
*value
)
2139 unsigned int result
= 0;
2141 count
= mos7840_chars_in_buffer(tty
);
2143 dbg("%s -- Empty", __func__
);
2144 result
= TIOCSER_TEMT
;
2147 if (copy_to_user(value
, &result
, sizeof(int)))
2152 /*****************************************************************************
2153 * mos7840_get_serial_info
2154 * function to get information about serial port
2155 *****************************************************************************/
2157 static int mos7840_get_serial_info(struct moschip_port
*mos7840_port
,
2158 struct serial_struct __user
*retinfo
)
2160 struct serial_struct tmp
;
2162 if (mos7840_port
== NULL
)
2168 memset(&tmp
, 0, sizeof(tmp
));
2170 tmp
.type
= PORT_16550A
;
2171 tmp
.line
= mos7840_port
->port
->serial
->minor
;
2172 tmp
.port
= mos7840_port
->port
->number
;
2174 tmp
.flags
= ASYNC_SKIP_TEST
| ASYNC_AUTO_IRQ
;
2175 tmp
.xmit_fifo_size
= NUM_URBS
* URB_TRANSFER_BUFFER_SIZE
;
2176 tmp
.baud_base
= 9600;
2177 tmp
.close_delay
= 5 * HZ
;
2178 tmp
.closing_wait
= 30 * HZ
;
2180 if (copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)))
2185 /*****************************************************************************
2187 * this function handles any ioctl calls to the driver
2188 *****************************************************************************/
2190 static int mos7840_ioctl(struct tty_struct
*tty
, struct file
*file
,
2191 unsigned int cmd
, unsigned long arg
)
2193 struct usb_serial_port
*port
= tty
->driver_data
;
2194 void __user
*argp
= (void __user
*)arg
;
2195 struct moschip_port
*mos7840_port
;
2197 struct async_icount cnow
;
2198 struct async_icount cprev
;
2199 struct serial_icounter_struct icount
;
2201 if (mos7840_port_paranoia_check(port
, __func__
)) {
2202 dbg("%s", "Invalid port");
2206 mos7840_port
= mos7840_get_port_private(port
);
2208 if (mos7840_port
== NULL
)
2211 dbg("%s - port %d, cmd = 0x%x", __func__
, port
->number
, cmd
);
2214 /* return number of bytes available */
2217 dbg("%s (%d) TIOCSERGETLSR", __func__
, port
->number
);
2218 return mos7840_get_lsr_info(tty
, argp
);
2222 dbg("%s (%d) TIOCGSERIAL", __func__
, port
->number
);
2223 return mos7840_get_serial_info(mos7840_port
, argp
);
2226 dbg("%s (%d) TIOCSSERIAL", __func__
, port
->number
);
2230 dbg("%s (%d) TIOCMIWAIT", __func__
, port
->number
);
2231 cprev
= mos7840_port
->icount
;
2233 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2234 mos7840_port
->delta_msr_cond
= 0;
2235 wait_event_interruptible(mos7840_port
->delta_msr_wait
,
2237 delta_msr_cond
== 1));
2239 /* see if a signal did it */
2240 if (signal_pending(current
))
2241 return -ERESTARTSYS
;
2242 cnow
= mos7840_port
->icount
;
2244 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
2245 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
)
2246 return -EIO
; /* no change => error */
2247 if (((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
.rng
)) ||
2248 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
.dsr
)) ||
2249 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
.dcd
)) ||
2250 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
.cts
))) {
2259 cnow
= mos7840_port
->icount
;
2261 icount
.cts
= cnow
.cts
;
2262 icount
.dsr
= cnow
.dsr
;
2263 icount
.rng
= cnow
.rng
;
2264 icount
.dcd
= cnow
.dcd
;
2265 icount
.rx
= cnow
.rx
;
2266 icount
.tx
= cnow
.tx
;
2267 icount
.frame
= cnow
.frame
;
2268 icount
.overrun
= cnow
.overrun
;
2269 icount
.parity
= cnow
.parity
;
2270 icount
.brk
= cnow
.brk
;
2271 icount
.buf_overrun
= cnow
.buf_overrun
;
2273 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__
,
2274 port
->number
, icount
.rx
, icount
.tx
);
2275 if (copy_to_user(argp
, &icount
, sizeof(icount
)))
2281 return -ENOIOCTLCMD
;
2284 static int mos7840_calc_num_ports(struct usb_serial
*serial
)
2286 int mos7840_num_ports
= 0;
2288 dbg("numberofendpoints: cur %d, alt %d",
2289 (int)serial
->interface
->cur_altsetting
->desc
.bNumEndpoints
,
2290 (int)serial
->interface
->altsetting
->desc
.bNumEndpoints
);
2291 if (serial
->interface
->cur_altsetting
->desc
.bNumEndpoints
== 5) {
2292 mos7840_num_ports
= serial
->num_ports
= 2;
2293 } else if (serial
->interface
->cur_altsetting
->desc
.bNumEndpoints
== 9) {
2294 serial
->num_bulk_in
= 4;
2295 serial
->num_bulk_out
= 4;
2296 mos7840_num_ports
= serial
->num_ports
= 4;
2298 dbg ("mos7840_num_ports = %d", mos7840_num_ports
);
2299 return mos7840_num_ports
;
2302 /****************************************************************************
2304 ****************************************************************************/
2306 static int mos7840_startup(struct usb_serial
*serial
)
2308 struct moschip_port
*mos7840_port
;
2309 struct usb_device
*dev
;
2313 dbg("%s", "mos7840_startup :Entering..........");
2316 dbg("%s", "Invalid Handler");
2322 dbg("%s", "Entering...");
2323 dbg ("mos7840_startup: serial = %p", serial
);
2325 /* we set up the pointers to the endpoints in the mos7840_open *
2326 * function, as the structures aren't created yet. */
2328 /* set up port private structures */
2329 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2330 dbg ("mos7840_startup: configuring port %d............", i
);
2331 mos7840_port
= kzalloc(sizeof(struct moschip_port
), GFP_KERNEL
);
2332 if (mos7840_port
== NULL
) {
2333 dev_err(&dev
->dev
, "%s - Out of memory\n", __func__
);
2335 i
--; /* don't follow NULL pointer cleaning up */
2339 /* Initialize all port interrupt end point to port 0 int
2340 * endpoint. Our device has only one interrupt end point
2341 * common to all port */
2343 mos7840_port
->port
= serial
->port
[i
];
2344 mos7840_set_port_private(serial
->port
[i
], mos7840_port
);
2345 spin_lock_init(&mos7840_port
->pool_lock
);
2347 /* minor is not initialised until later by
2348 * usb-serial.c:get_free_serial() and cannot therefore be used
2349 * to index device instances */
2350 mos7840_port
->port_num
= i
+ 1;
2351 dbg ("serial->port[i]->number = %d", serial
->port
[i
]->number
);
2352 dbg ("serial->port[i]->serial->minor = %d", serial
->port
[i
]->serial
->minor
);
2353 dbg ("mos7840_port->port_num = %d", mos7840_port
->port_num
);
2354 dbg ("serial->minor = %d", serial
->minor
);
2356 if (mos7840_port
->port_num
== 1) {
2357 mos7840_port
->SpRegOffset
= 0x0;
2358 mos7840_port
->ControlRegOffset
= 0x1;
2359 mos7840_port
->DcrRegOffset
= 0x4;
2360 } else if ((mos7840_port
->port_num
== 2)
2361 && (serial
->num_ports
== 4)) {
2362 mos7840_port
->SpRegOffset
= 0x8;
2363 mos7840_port
->ControlRegOffset
= 0x9;
2364 mos7840_port
->DcrRegOffset
= 0x16;
2365 } else if ((mos7840_port
->port_num
== 2)
2366 && (serial
->num_ports
== 2)) {
2367 mos7840_port
->SpRegOffset
= 0xa;
2368 mos7840_port
->ControlRegOffset
= 0xb;
2369 mos7840_port
->DcrRegOffset
= 0x19;
2370 } else if ((mos7840_port
->port_num
== 3)
2371 && (serial
->num_ports
== 4)) {
2372 mos7840_port
->SpRegOffset
= 0xa;
2373 mos7840_port
->ControlRegOffset
= 0xb;
2374 mos7840_port
->DcrRegOffset
= 0x19;
2375 } else if ((mos7840_port
->port_num
== 4)
2376 && (serial
->num_ports
== 4)) {
2377 mos7840_port
->SpRegOffset
= 0xc;
2378 mos7840_port
->ControlRegOffset
= 0xd;
2379 mos7840_port
->DcrRegOffset
= 0x1c;
2381 mos7840_dump_serial_port(mos7840_port
);
2382 mos7840_set_port_private(serial
->port
[i
], mos7840_port
);
2384 /* enable rx_disable bit in control register */
2385 status
= mos7840_get_reg_sync(serial
->port
[i
],
2386 mos7840_port
->ControlRegOffset
, &Data
);
2388 dbg("Reading ControlReg failed status-0x%x", status
);
2391 dbg("ControlReg Reading success val is %x, status%d",
2393 Data
|= 0x08; /* setting driver done bit */
2394 Data
|= 0x04; /* sp1_bit to have cts change reflect in
2397 /* Data |= 0x20; //rx_disable bit */
2398 status
= mos7840_set_reg_sync(serial
->port
[i
],
2399 mos7840_port
->ControlRegOffset
, Data
);
2401 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status
);
2404 dbg("ControlReg Writing success(rx_disable) status%d",
2407 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2410 status
= mos7840_set_reg_sync(serial
->port
[i
],
2411 (__u16
) (mos7840_port
->DcrRegOffset
+ 0), Data
);
2413 dbg("Writing DCR0 failed status-0x%x", status
);
2416 dbg("DCR0 Writing success status%d", status
);
2419 status
= mos7840_set_reg_sync(serial
->port
[i
],
2420 (__u16
) (mos7840_port
->DcrRegOffset
+ 1), Data
);
2422 dbg("Writing DCR1 failed status-0x%x", status
);
2425 dbg("DCR1 Writing success status%d", status
);
2428 status
= mos7840_set_reg_sync(serial
->port
[i
],
2429 (__u16
) (mos7840_port
->DcrRegOffset
+ 2), Data
);
2431 dbg("Writing DCR2 failed status-0x%x", status
);
2434 dbg("DCR2 Writing success status%d", status
);
2436 /* write values in clkstart0x0 and clkmulti 0x20 */
2438 status
= mos7840_set_reg_sync(serial
->port
[i
],
2439 CLK_START_VALUE_REGISTER
, Data
);
2441 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status
);
2444 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status
);
2447 status
= mos7840_set_reg_sync(serial
->port
[i
],
2448 CLK_MULTI_REGISTER
, Data
);
2450 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x",
2454 dbg("CLK_MULTI_REGISTER Writing success status%d",
2457 /* write value 0x0 to scratchpad register */
2459 status
= mos7840_set_uart_reg(serial
->port
[i
],
2460 SCRATCH_PAD_REGISTER
, Data
);
2462 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x",
2466 dbg("SCRATCH_PAD_REGISTER Writing success status%d",
2469 /* Zero Length flag register */
2470 if ((mos7840_port
->port_num
!= 1)
2471 && (serial
->num_ports
== 2)) {
2474 status
= mos7840_set_reg_sync(serial
->port
[i
],
2476 ((__u16
)mos7840_port
->port_num
)), Data
);
2477 dbg("ZLIP offset %x",
2479 ((__u16
) mos7840_port
->port_num
)));
2481 dbg("Writing ZLP_REG%d failed status-0x%x",
2485 dbg("ZLP_REG%d Writing success status%d",
2489 status
= mos7840_set_reg_sync(serial
->port
[i
],
2491 ((__u16
)mos7840_port
->port_num
) - 0x1), Data
);
2492 dbg("ZLIP offset %x",
2494 ((__u16
) mos7840_port
->port_num
) - 0x1));
2496 dbg("Writing ZLP_REG%d failed status-0x%x",
2500 dbg("ZLP_REG%d Writing success status%d",
2504 mos7840_port
->control_urb
= usb_alloc_urb(0, GFP_KERNEL
);
2505 mos7840_port
->ctrl_buf
= kmalloc(16, GFP_KERNEL
);
2506 mos7840_port
->dr
= kmalloc(sizeof(struct usb_ctrlrequest
),
2508 if (!mos7840_port
->control_urb
|| !mos7840_port
->ctrl_buf
||
2509 !mos7840_port
->dr
) {
2514 dbg ("mos7840_startup: all ports configured...........");
2516 /* Zero Length flag enable */
2518 status
= mos7840_set_reg_sync(serial
->port
[0], ZLP_REG5
, Data
);
2520 dbg("Writing ZLP_REG5 failed status-0x%x", status
);
2523 dbg("ZLP_REG5 Writing success status%d", status
);
2525 /* setting configuration feature to one */
2526 usb_control_msg(serial
->dev
, usb_sndctrlpipe(serial
->dev
, 0),
2527 (__u8
) 0x03, 0x00, 0x01, 0x00, NULL
, 0x00, 5 * HZ
);
2530 for (/* nothing */; i
>= 0; i
--) {
2531 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
2533 kfree(mos7840_port
->dr
);
2534 kfree(mos7840_port
->ctrl_buf
);
2535 usb_free_urb(mos7840_port
->control_urb
);
2536 kfree(mos7840_port
);
2537 serial
->port
[i
] = NULL
;
2542 /****************************************************************************
2543 * mos7840_disconnect
2544 * This function is called whenever the device is removed from the usb bus.
2545 ****************************************************************************/
2547 static void mos7840_disconnect(struct usb_serial
*serial
)
2550 unsigned long flags
;
2551 struct moschip_port
*mos7840_port
;
2552 dbg("%s", " disconnect :entering..........");
2555 dbg("%s", "Invalid Handler");
2559 /* check for the ports to be closed,close the ports and disconnect */
2561 /* free private structure allocated for serial port *
2562 * stop reads and writes on all ports */
2564 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2565 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
2566 dbg ("mos7840_port %d = %p", i
, mos7840_port
);
2568 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
2569 mos7840_port
->zombie
= 1;
2570 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
2571 usb_kill_urb(mos7840_port
->control_urb
);
2575 dbg("%s", "Thank u :: ");
2579 /****************************************************************************
2581 * This function is called when the usb_serial structure is freed.
2582 ****************************************************************************/
2584 static void mos7840_release(struct usb_serial
*serial
)
2587 struct moschip_port
*mos7840_port
;
2588 dbg("%s", " release :entering..........");
2591 dbg("%s", "Invalid Handler");
2595 /* check for the ports to be closed,close the ports and disconnect */
2597 /* free private structure allocated for serial port *
2598 * stop reads and writes on all ports */
2600 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2601 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
2602 dbg("mos7840_port %d = %p", i
, mos7840_port
);
2604 kfree(mos7840_port
->ctrl_buf
);
2605 kfree(mos7840_port
->dr
);
2606 kfree(mos7840_port
);
2610 dbg("%s", "Thank u :: ");
2614 static struct usb_driver io_driver
= {
2616 .probe
= usb_serial_probe
,
2617 .disconnect
= usb_serial_disconnect
,
2618 .id_table
= moschip_id_table_combined
,
2622 static struct usb_serial_driver moschip7840_4port_device
= {
2624 .owner
= THIS_MODULE
,
2627 .description
= DRIVER_DESC
,
2628 .usb_driver
= &io_driver
,
2629 .id_table
= moschip_port_id_table
,
2631 .open
= mos7840_open
,
2632 .close
= mos7840_close
,
2633 .write
= mos7840_write
,
2634 .write_room
= mos7840_write_room
,
2635 .chars_in_buffer
= mos7840_chars_in_buffer
,
2636 .throttle
= mos7840_throttle
,
2637 .unthrottle
= mos7840_unthrottle
,
2638 .calc_num_ports
= mos7840_calc_num_ports
,
2639 #ifdef MCSSerialProbe
2640 .probe
= mos7840_serial_probe
,
2642 .ioctl
= mos7840_ioctl
,
2643 .set_termios
= mos7840_set_termios
,
2644 .break_ctl
= mos7840_break
,
2645 .tiocmget
= mos7840_tiocmget
,
2646 .tiocmset
= mos7840_tiocmset
,
2647 .attach
= mos7840_startup
,
2648 .disconnect
= mos7840_disconnect
,
2649 .release
= mos7840_release
,
2650 .read_bulk_callback
= mos7840_bulk_in_callback
,
2651 .read_int_callback
= mos7840_interrupt_callback
,
2654 /****************************************************************************
2656 * This is called by the module subsystem, or on startup to initialize us
2657 ****************************************************************************/
2658 static int __init
moschip7840_init(void)
2662 dbg("%s", " mos7840_init :entering..........");
2664 /* Register with the usb serial */
2665 retval
= usb_serial_register(&moschip7840_4port_device
);
2668 goto failed_port_device_register
;
2670 dbg("%s", "Entering...");
2671 printk(KERN_INFO KBUILD_MODNAME
": " DRIVER_VERSION
":"
2674 /* Register with the usb */
2675 retval
= usb_register(&io_driver
);
2677 dbg("%s", "Leaving...");
2680 usb_serial_deregister(&moschip7840_4port_device
);
2681 failed_port_device_register
:
2685 /****************************************************************************
2687 * Called when the driver is about to be unloaded.
2688 ****************************************************************************/
2689 static void __exit
moschip7840_exit(void)
2692 dbg("%s", " mos7840_exit :entering..........");
2694 usb_deregister(&io_driver
);
2696 usb_serial_deregister(&moschip7840_4port_device
);
2698 dbg("%s", "Entering...");
2701 module_init(moschip7840_init
);
2702 module_exit(moschip7840_exit
);
2704 /* Module information */
2705 MODULE_DESCRIPTION(DRIVER_DESC
);
2706 MODULE_LICENSE("GPL");
2708 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
2709 MODULE_PARM_DESC(debug
, "Debug enabled or not");