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_2P 0xBC00
125 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
126 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01
127 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29
128 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30
129 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31
130 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32
131 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
132 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02
133 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
134 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
135 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
137 /* This driver also supports
138 * ATEN UC2324 device using Moschip MCS7840
139 * ATEN UC2322 device using Moschip MCS7820
141 #define USB_VENDOR_ID_ATENINTL 0x0557
142 #define ATENINTL_DEVICE_ID_UC2324 0x2011
143 #define ATENINTL_DEVICE_ID_UC2322 0x7820
145 /* Interrupt Routine Defines */
147 #define SERIAL_IIR_RLS 0x06
148 #define SERIAL_IIR_MS 0x00
151 * Emulation of the bit mask on the LINE STATUS REGISTER.
153 #define SERIAL_LSR_DR 0x0001
154 #define SERIAL_LSR_OE 0x0002
155 #define SERIAL_LSR_PE 0x0004
156 #define SERIAL_LSR_FE 0x0008
157 #define SERIAL_LSR_BI 0x0010
159 #define MOS_MSR_DELTA_CTS 0x10
160 #define MOS_MSR_DELTA_DSR 0x20
161 #define MOS_MSR_DELTA_RI 0x40
162 #define MOS_MSR_DELTA_CD 0x80
164 /* Serial Port register Address */
165 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
166 #define FIFO_CONTROL_REGISTER ((__u16)(0x02))
167 #define LINE_CONTROL_REGISTER ((__u16)(0x03))
168 #define MODEM_CONTROL_REGISTER ((__u16)(0x04))
169 #define LINE_STATUS_REGISTER ((__u16)(0x05))
170 #define MODEM_STATUS_REGISTER ((__u16)(0x06))
171 #define SCRATCH_PAD_REGISTER ((__u16)(0x07))
172 #define DIVISOR_LATCH_LSB ((__u16)(0x00))
173 #define DIVISOR_LATCH_MSB ((__u16)(0x01))
175 #define CLK_MULTI_REGISTER ((__u16)(0x02))
176 #define CLK_START_VALUE_REGISTER ((__u16)(0x03))
178 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
181 * URB POOL related defines
183 #define NUM_URBS 16 /* URB Count */
184 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
187 static const struct usb_device_id moschip_port_id_table
[] = {
188 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7840
)},
189 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7820
)},
190 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_2
)},
191 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_2P
)},
192 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_4
)},
193 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_4P
)},
194 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_US9ML2_2
)},
195 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_US9ML2_4
)},
196 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USPTL4_2
)},
197 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USPTL4_4
)},
198 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_2
)},
199 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_2P
)},
200 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_4
)},
201 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_4P
)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL2_4
)},
203 {USB_DEVICE(USB_VENDOR_ID_ATENINTL
, ATENINTL_DEVICE_ID_UC2324
)},
204 {USB_DEVICE(USB_VENDOR_ID_ATENINTL
, ATENINTL_DEVICE_ID_UC2322
)},
205 {} /* terminating entry */
208 static const struct usb_device_id moschip_id_table_combined
[] __devinitconst
= {
209 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7840
)},
210 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7820
)},
211 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_2
)},
212 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_2P
)},
213 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_4
)},
214 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_4P
)},
215 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_US9ML2_2
)},
216 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_US9ML2_4
)},
217 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USPTL4_2
)},
218 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USPTL4_4
)},
219 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_2
)},
220 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_2P
)},
221 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_4
)},
222 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_4P
)},
223 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL2_4
)},
224 {USB_DEVICE(USB_VENDOR_ID_ATENINTL
, ATENINTL_DEVICE_ID_UC2324
)},
225 {USB_DEVICE(USB_VENDOR_ID_ATENINTL
, ATENINTL_DEVICE_ID_UC2322
)},
226 {} /* terminating entry */
229 MODULE_DEVICE_TABLE(usb
, moschip_id_table_combined
);
231 /* This structure holds all of the local port information */
233 struct moschip_port
{
234 int port_num
; /*Actual port number in the device(1,2,etc) */
235 struct urb
*write_urb
; /* write URB for this port */
236 struct urb
*read_urb
; /* read URB for this port */
238 __u8 shadowLCR
; /* last LCR value received */
239 __u8 shadowMCR
; /* last MCR value received */
243 wait_queue_head_t wait_chase
; /* for handling sleeping while waiting for chase to finish */
244 wait_queue_head_t delta_msr_wait
; /* for handling sleeping while waiting for msr change to happen */
246 struct async_icount icount
;
247 struct usb_serial_port
*port
; /* loop back to the owner of this object */
251 __u8 ControlRegOffset
;
253 /* for processing control URBS in interrupt context */
254 struct urb
*control_urb
;
255 struct usb_ctrlrequest
*dr
;
259 spinlock_t pool_lock
;
260 struct urb
*write_urb_pool
[NUM_URBS
];
269 * mos7840_set_reg_sync
270 * To set the Control register by calling usb_fill_control_urb function
271 * by passing usb_sndctrlpipe function as parameter.
274 static int mos7840_set_reg_sync(struct usb_serial_port
*port
, __u16 reg
,
277 struct usb_device
*dev
= port
->serial
->dev
;
279 dbg("mos7840_set_reg_sync offset is %x, value %x", reg
, val
);
281 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), MCS_WRREQ
,
282 MCS_WR_RTYPE
, val
, reg
, NULL
, 0,
287 * mos7840_get_reg_sync
288 * To set the Uart register by calling usb_fill_control_urb function by
289 * passing usb_rcvctrlpipe function as parameter.
292 static int mos7840_get_reg_sync(struct usb_serial_port
*port
, __u16 reg
,
295 struct usb_device
*dev
= port
->serial
->dev
;
299 buf
= kmalloc(VENDOR_READ_LENGTH
, GFP_KERNEL
);
303 ret
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0), MCS_RDREQ
,
304 MCS_RD_RTYPE
, 0, reg
, buf
, VENDOR_READ_LENGTH
,
307 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg
, *val
);
314 * mos7840_set_uart_reg
315 * To set the Uart register by calling usb_fill_control_urb function by
316 * passing usb_sndctrlpipe function as parameter.
319 static int mos7840_set_uart_reg(struct usb_serial_port
*port
, __u16 reg
,
323 struct usb_device
*dev
= port
->serial
->dev
;
325 /* For the UART control registers, the application number need
327 if (port
->serial
->num_ports
== 4) {
328 val
|= (((__u16
) port
->number
-
329 (__u16
) (port
->serial
->minor
)) + 1) << 8;
330 dbg("mos7840_set_uart_reg application number is %x", val
);
332 if (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) == 0) {
333 val
|= (((__u16
) port
->number
-
334 (__u16
) (port
->serial
->minor
)) + 1) << 8;
335 dbg("mos7840_set_uart_reg application number is %x",
339 (((__u16
) port
->number
-
340 (__u16
) (port
->serial
->minor
)) + 2) << 8;
341 dbg("mos7840_set_uart_reg application number is %x",
345 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), MCS_WRREQ
,
346 MCS_WR_RTYPE
, val
, reg
, NULL
, 0,
352 * mos7840_get_uart_reg
353 * To set the Control register by calling usb_fill_control_urb function
354 * by passing usb_rcvctrlpipe function as parameter.
356 static int mos7840_get_uart_reg(struct usb_serial_port
*port
, __u16 reg
,
359 struct usb_device
*dev
= port
->serial
->dev
;
364 buf
= kmalloc(VENDOR_READ_LENGTH
, GFP_KERNEL
);
368 /* dbg("application number is %4x",
369 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
370 /* Wval is same as application number */
371 if (port
->serial
->num_ports
== 4) {
373 (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) +
375 dbg("mos7840_get_uart_reg application number is %x", Wval
);
377 if (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) == 0) {
378 Wval
= (((__u16
) port
->number
-
379 (__u16
) (port
->serial
->minor
)) + 1) << 8;
380 dbg("mos7840_get_uart_reg application number is %x",
383 Wval
= (((__u16
) port
->number
-
384 (__u16
) (port
->serial
->minor
)) + 2) << 8;
385 dbg("mos7840_get_uart_reg application number is %x",
389 ret
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0), MCS_RDREQ
,
390 MCS_RD_RTYPE
, Wval
, reg
, buf
, VENDOR_READ_LENGTH
,
398 static void mos7840_dump_serial_port(struct moschip_port
*mos7840_port
)
401 dbg("***************************************");
402 dbg("SpRegOffset is %2x", mos7840_port
->SpRegOffset
);
403 dbg("ControlRegOffset is %2x", mos7840_port
->ControlRegOffset
);
404 dbg("DCRRegOffset is %2x", mos7840_port
->DcrRegOffset
);
405 dbg("***************************************");
409 /************************************************************************/
410 /************************************************************************/
411 /* I N T E R F A C E F U N C T I O N S */
412 /* I N T E R F A C E F U N C T I O N S */
413 /************************************************************************/
414 /************************************************************************/
416 static inline void mos7840_set_port_private(struct usb_serial_port
*port
,
417 struct moschip_port
*data
)
419 usb_set_serial_port_data(port
, (void *)data
);
422 static inline struct moschip_port
*mos7840_get_port_private(struct
426 return (struct moschip_port
*)usb_get_serial_port_data(port
);
429 static void mos7840_handle_new_msr(struct moschip_port
*port
, __u8 new_msr
)
431 struct moschip_port
*mos7840_port
;
432 struct async_icount
*icount
;
434 icount
= &mos7840_port
->icount
;
436 (MOS_MSR_DELTA_CTS
| MOS_MSR_DELTA_DSR
| MOS_MSR_DELTA_RI
|
438 icount
= &mos7840_port
->icount
;
440 /* update input line counters */
441 if (new_msr
& MOS_MSR_DELTA_CTS
) {
445 if (new_msr
& MOS_MSR_DELTA_DSR
) {
449 if (new_msr
& MOS_MSR_DELTA_CD
) {
453 if (new_msr
& MOS_MSR_DELTA_RI
) {
460 static void mos7840_handle_new_lsr(struct moschip_port
*port
, __u8 new_lsr
)
462 struct async_icount
*icount
;
464 dbg("%s - %02x", __func__
, new_lsr
);
466 if (new_lsr
& SERIAL_LSR_BI
) {
468 * Parity and Framing errors only count if they
469 * occur exclusive of a break being
472 new_lsr
&= (__u8
) (SERIAL_LSR_OE
| SERIAL_LSR_BI
);
475 /* update input line counters */
476 icount
= &port
->icount
;
477 if (new_lsr
& SERIAL_LSR_BI
) {
481 if (new_lsr
& SERIAL_LSR_OE
) {
485 if (new_lsr
& SERIAL_LSR_PE
) {
489 if (new_lsr
& SERIAL_LSR_FE
) {
495 /************************************************************************/
496 /************************************************************************/
497 /* U S B C A L L B A C K F U N C T I O N S */
498 /* U S B C A L L B A C K F U N C T I O N S */
499 /************************************************************************/
500 /************************************************************************/
502 static void mos7840_control_callback(struct urb
*urb
)
505 struct moschip_port
*mos7840_port
;
508 int status
= urb
->status
;
510 mos7840_port
= urb
->context
;
519 /* this urb is terminated, clean up */
520 dbg("%s - urb shutting down with status: %d", __func__
,
524 dbg("%s - nonzero urb status received: %d", __func__
,
529 dbg("%s urb buffer size is %d", __func__
, urb
->actual_length
);
530 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__
,
531 mos7840_port
->MsrLsr
, mos7840_port
->port_num
);
532 data
= urb
->transfer_buffer
;
533 regval
= (__u8
) data
[0];
534 dbg("%s data is %x", __func__
, regval
);
535 if (mos7840_port
->MsrLsr
== 0)
536 mos7840_handle_new_msr(mos7840_port
, regval
);
537 else if (mos7840_port
->MsrLsr
== 1)
538 mos7840_handle_new_lsr(mos7840_port
, regval
);
541 spin_lock(&mos7840_port
->pool_lock
);
542 if (!mos7840_port
->zombie
)
543 result
= usb_submit_urb(mos7840_port
->int_urb
, GFP_ATOMIC
);
544 spin_unlock(&mos7840_port
->pool_lock
);
546 dev_err(&urb
->dev
->dev
,
547 "%s - Error %d submitting interrupt urb\n",
552 static int mos7840_get_reg(struct moschip_port
*mcs
, __u16 Wval
, __u16 reg
,
555 struct usb_device
*dev
= mcs
->port
->serial
->dev
;
556 struct usb_ctrlrequest
*dr
= mcs
->dr
;
557 unsigned char *buffer
= mcs
->ctrl_buf
;
560 dr
->bRequestType
= MCS_RD_RTYPE
;
561 dr
->bRequest
= MCS_RDREQ
;
562 dr
->wValue
= cpu_to_le16(Wval
); /* 0 */
563 dr
->wIndex
= cpu_to_le16(reg
);
564 dr
->wLength
= cpu_to_le16(2);
566 usb_fill_control_urb(mcs
->control_urb
, dev
, usb_rcvctrlpipe(dev
, 0),
567 (unsigned char *)dr
, buffer
, 2,
568 mos7840_control_callback
, mcs
);
569 mcs
->control_urb
->transfer_buffer_length
= 2;
570 ret
= usb_submit_urb(mcs
->control_urb
, GFP_ATOMIC
);
574 /*****************************************************************************
575 * mos7840_interrupt_callback
576 * this is the callback function for when we have received data on the
577 * interrupt endpoint.
578 *****************************************************************************/
580 static void mos7840_interrupt_callback(struct urb
*urb
)
584 struct moschip_port
*mos7840_port
;
585 struct usb_serial
*serial
;
590 __u16 wval
, wreg
= 0;
591 int status
= urb
->status
;
593 dbg("%s", " : Entering");
602 /* this urb is terminated, clean up */
603 dbg("%s - urb shutting down with status: %d", __func__
,
607 dbg("%s - nonzero urb status received: %d", __func__
,
612 length
= urb
->actual_length
;
613 data
= urb
->transfer_buffer
;
615 serial
= urb
->context
;
617 /* Moschip get 5 bytes
618 * Byte 1 IIR Port 1 (port.number is 0)
619 * Byte 2 IIR Port 2 (port.number is 1)
620 * Byte 3 IIR Port 3 (port.number is 2)
621 * Byte 4 IIR Port 4 (port.number is 3)
622 * Byte 5 FIFO status for both */
624 if (length
&& length
> 5) {
625 dbg("%s", "Wrong data !!!");
629 sp
[0] = (__u8
) data
[0];
630 sp
[1] = (__u8
) data
[1];
631 sp
[2] = (__u8
) data
[2];
632 sp
[3] = (__u8
) data
[3];
635 for (i
= 0; i
< serial
->num_ports
; i
++) {
636 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
638 (((__u16
) serial
->port
[i
]->number
-
639 (__u16
) (serial
->minor
)) + 1) << 8;
640 if (mos7840_port
->open
) {
642 dbg("SP%d No Interrupt !!!", i
);
644 switch (sp
[i
] & 0x0f) {
646 dbg("Serial Port %d: Receiver status error or ", i
);
647 dbg("address bit detected in 9-bit mode");
648 mos7840_port
->MsrLsr
= 1;
649 wreg
= LINE_STATUS_REGISTER
;
652 dbg("Serial Port %d: Modem status change", i
);
653 mos7840_port
->MsrLsr
= 0;
654 wreg
= MODEM_STATUS_REGISTER
;
657 spin_lock(&mos7840_port
->pool_lock
);
658 if (!mos7840_port
->zombie
) {
659 rv
= mos7840_get_reg(mos7840_port
, wval
, wreg
, &Data
);
661 spin_unlock(&mos7840_port
->pool_lock
);
664 spin_unlock(&mos7840_port
->pool_lock
);
669 /* the completion handler for the control urb will resubmit */
672 result
= usb_submit_urb(urb
, GFP_ATOMIC
);
674 dev_err(&urb
->dev
->dev
,
675 "%s - Error %d submitting interrupt urb\n",
680 static int mos7840_port_paranoia_check(struct usb_serial_port
*port
,
681 const char *function
)
684 dbg("%s - port == NULL", function
);
688 dbg("%s - port->serial == NULL", function
);
695 /* Inline functions to check the sanity of a pointer that is passed to us */
696 static int mos7840_serial_paranoia_check(struct usb_serial
*serial
,
697 const char *function
)
700 dbg("%s - serial == NULL", function
);
704 dbg("%s - serial->type == NULL!", function
);
711 static struct usb_serial
*mos7840_get_usb_serial(struct usb_serial_port
*port
,
712 const char *function
)
714 /* if no port was specified, or it fails a paranoia check */
716 mos7840_port_paranoia_check(port
, function
) ||
717 mos7840_serial_paranoia_check(port
->serial
, function
)) {
718 /* then say that we don't have a valid usb_serial thing,
719 * which will end up genrating -ENODEV return values */
726 /*****************************************************************************
727 * mos7840_bulk_in_callback
728 * this is the callback function for when we have received data on the
730 *****************************************************************************/
732 static void mos7840_bulk_in_callback(struct urb
*urb
)
736 struct usb_serial
*serial
;
737 struct usb_serial_port
*port
;
738 struct moschip_port
*mos7840_port
;
739 struct tty_struct
*tty
;
740 int status
= urb
->status
;
742 mos7840_port
= urb
->context
;
744 dbg("%s", "NULL mos7840_port pointer");
749 dbg("nonzero read bulk status received: %d", status
);
750 mos7840_port
->read_urb_busy
= false;
754 port
= (struct usb_serial_port
*)mos7840_port
->port
;
755 if (mos7840_port_paranoia_check(port
, __func__
)) {
756 dbg("%s", "Port Paranoia failed");
757 mos7840_port
->read_urb_busy
= false;
761 serial
= mos7840_get_usb_serial(port
, __func__
);
763 dbg("%s", "Bad serial pointer");
764 mos7840_port
->read_urb_busy
= false;
768 dbg("%s", "Entering... ");
770 data
= urb
->transfer_buffer
;
772 dbg("%s", "Entering ...........");
774 if (urb
->actual_length
) {
775 tty
= tty_port_tty_get(&mos7840_port
->port
->port
);
777 tty_insert_flip_string(tty
, data
, urb
->actual_length
);
779 tty_flip_buffer_push(tty
);
782 mos7840_port
->icount
.rx
+= urb
->actual_length
;
784 dbg("mos7840_port->icount.rx is %d:",
785 mos7840_port
->icount
.rx
);
788 if (!mos7840_port
->read_urb
) {
789 dbg("%s", "URB KILLED !!!");
790 mos7840_port
->read_urb_busy
= false;
795 mos7840_port
->read_urb
->dev
= serial
->dev
;
797 mos7840_port
->read_urb_busy
= true;
798 retval
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
801 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval
);
802 mos7840_port
->read_urb_busy
= false;
806 /*****************************************************************************
807 * mos7840_bulk_out_data_callback
808 * this is the callback function for when we have finished sending
809 * serial data on the bulk out endpoint.
810 *****************************************************************************/
812 static void mos7840_bulk_out_data_callback(struct urb
*urb
)
814 struct moschip_port
*mos7840_port
;
815 struct tty_struct
*tty
;
816 int status
= urb
->status
;
819 mos7840_port
= urb
->context
;
820 spin_lock(&mos7840_port
->pool_lock
);
821 for (i
= 0; i
< NUM_URBS
; i
++) {
822 if (urb
== mos7840_port
->write_urb_pool
[i
]) {
823 mos7840_port
->busy
[i
] = 0;
827 spin_unlock(&mos7840_port
->pool_lock
);
830 dbg("nonzero write bulk status received:%d", status
);
834 if (mos7840_port_paranoia_check(mos7840_port
->port
, __func__
)) {
835 dbg("%s", "Port Paranoia failed");
839 dbg("%s", "Entering .........");
841 tty
= tty_port_tty_get(&mos7840_port
->port
->port
);
842 if (tty
&& mos7840_port
->open
)
848 /************************************************************************/
849 /* 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 */
850 /************************************************************************/
851 #ifdef MCSSerialProbe
852 static int mos7840_serial_probe(struct usb_serial
*serial
,
853 const struct usb_device_id
*id
)
856 /*need to implement the mode_reg reading and updating\
857 structures usb_serial_ device_type\
858 (i.e num_ports, num_bulkin,bulkout etc) */
859 /* Also we can update the changes attach */
864 /*****************************************************************************
866 * this function is called by the tty driver when a port is opened
867 * If successful, we return 0
868 * Otherwise we return a negative error number.
869 *****************************************************************************/
871 static int mos7840_open(struct tty_struct
*tty
, struct usb_serial_port
*port
)
875 struct usb_serial
*serial
;
879 struct moschip_port
*mos7840_port
;
880 struct moschip_port
*port0
;
882 dbg ("%s enter", __func__
);
884 if (mos7840_port_paranoia_check(port
, __func__
)) {
885 dbg("%s", "Port Paranoia failed");
889 serial
= port
->serial
;
891 if (mos7840_serial_paranoia_check(serial
, __func__
)) {
892 dbg("%s", "Serial Paranoia failed");
896 mos7840_port
= mos7840_get_port_private(port
);
897 port0
= mos7840_get_port_private(serial
->port
[0]);
899 if (mos7840_port
== NULL
|| port0
== NULL
)
902 usb_clear_halt(serial
->dev
, port
->write_urb
->pipe
);
903 usb_clear_halt(serial
->dev
, port
->read_urb
->pipe
);
906 /* Initialising the write urb pool */
907 for (j
= 0; j
< NUM_URBS
; ++j
) {
908 urb
= usb_alloc_urb(0, GFP_KERNEL
);
909 mos7840_port
->write_urb_pool
[j
] = urb
;
912 dev_err(&port
->dev
, "No more urbs???\n");
916 urb
->transfer_buffer
= kmalloc(URB_TRANSFER_BUFFER_SIZE
,
918 if (!urb
->transfer_buffer
) {
920 mos7840_port
->write_urb_pool
[j
] = NULL
;
922 "%s-out of memory for urb buffers.\n",
928 /*****************************************************************************
929 * Initialize MCS7840 -- Write Init values to corresponding Registers
937 * 0x08 : SP1/2 Control Reg
938 *****************************************************************************/
940 /* NEED to check the following Block */
943 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
, &Data
);
945 dbg("Reading Spreg failed");
949 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
951 dbg("writing Spreg failed");
956 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
958 dbg("writing Spreg failed");
961 /* End of block to be checked */
964 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
967 dbg("Reading Controlreg failed");
970 Data
|= 0x08; /* Driver done bit */
971 Data
|= 0x20; /* rx_disable */
972 status
= mos7840_set_reg_sync(port
,
973 mos7840_port
->ControlRegOffset
, Data
);
975 dbg("writing Controlreg failed");
978 /* do register settings here */
979 /* Set all regs to the device default values. */
980 /***********************************
981 * First Disable all interrupts.
982 ***********************************/
984 status
= mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
986 dbg("disabling interrupts failed");
989 /* Set FIFO_CONTROL_REGISTER to the default value */
991 status
= mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
993 dbg("Writing FIFO_CONTROL_REGISTER failed");
998 status
= mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
1000 dbg("Writing FIFO_CONTROL_REGISTER failed");
1005 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1006 mos7840_port
->shadowLCR
= Data
;
1009 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
1010 mos7840_port
->shadowMCR
= Data
;
1013 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
1014 mos7840_port
->shadowLCR
= Data
;
1016 Data
|= SERIAL_LCR_DLAB
; /* data latch enable in LCR 0x80 */
1017 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1020 status
= mos7840_set_uart_reg(port
, DIVISOR_LATCH_LSB
, Data
);
1023 status
= mos7840_set_uart_reg(port
, DIVISOR_LATCH_MSB
, Data
);
1026 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
1028 Data
= Data
& ~SERIAL_LCR_DLAB
;
1029 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1030 mos7840_port
->shadowLCR
= Data
;
1032 /* clearing Bulkin and Bulkout Fifo */
1034 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
, &Data
);
1037 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
1039 Data
= Data
& ~0x0c;
1040 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
1041 /* Finally enable all interrupts */
1043 status
= mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
1045 /* clearing rx_disable */
1047 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1049 Data
= Data
& ~0x20;
1050 status
= mos7840_set_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1055 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1058 status
= mos7840_set_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1061 /* Check to see if we've set up our endpoint info yet *
1062 * (can't set it up in mos7840_startup as the structures *
1063 * were not set up at that time.) */
1064 if (port0
->open_ports
== 1) {
1065 if (serial
->port
[0]->interrupt_in_buffer
== NULL
) {
1066 /* set up interrupt urb */
1067 usb_fill_int_urb(serial
->port
[0]->interrupt_in_urb
,
1069 usb_rcvintpipe(serial
->dev
,
1070 serial
->port
[0]->interrupt_in_endpointAddress
),
1071 serial
->port
[0]->interrupt_in_buffer
,
1072 serial
->port
[0]->interrupt_in_urb
->
1073 transfer_buffer_length
,
1074 mos7840_interrupt_callback
,
1076 serial
->port
[0]->interrupt_in_urb
->interval
);
1078 /* start interrupt read for mos7840 *
1079 * will continue as long as mos7840 is connected */
1082 usb_submit_urb(serial
->port
[0]->interrupt_in_urb
,
1085 dev_err(&port
->dev
, "%s - Error %d submitting "
1086 "interrupt urb\n", __func__
, response
);
1093 /* see if we've set up our endpoint info yet *
1094 * (can't set it up in mos7840_startup as the *
1095 * structures were not set up at that time.) */
1097 dbg("port number is %d", port
->number
);
1098 dbg("serial number is %d", port
->serial
->minor
);
1099 dbg("Bulkin endpoint is %d", port
->bulk_in_endpointAddress
);
1100 dbg("BulkOut endpoint is %d", port
->bulk_out_endpointAddress
);
1101 dbg("Interrupt endpoint is %d", port
->interrupt_in_endpointAddress
);
1102 dbg("port's number in the device is %d", mos7840_port
->port_num
);
1103 mos7840_port
->read_urb
= port
->read_urb
;
1105 /* set up our bulk in urb */
1107 usb_fill_bulk_urb(mos7840_port
->read_urb
,
1109 usb_rcvbulkpipe(serial
->dev
,
1110 port
->bulk_in_endpointAddress
),
1111 port
->bulk_in_buffer
,
1112 mos7840_port
->read_urb
->transfer_buffer_length
,
1113 mos7840_bulk_in_callback
, mos7840_port
);
1115 dbg("mos7840_open: bulkin endpoint is %d",
1116 port
->bulk_in_endpointAddress
);
1117 mos7840_port
->read_urb_busy
= true;
1118 response
= usb_submit_urb(mos7840_port
->read_urb
, GFP_KERNEL
);
1120 dev_err(&port
->dev
, "%s - Error %d submitting control urb\n",
1121 __func__
, response
);
1122 mos7840_port
->read_urb_busy
= false;
1125 /* initialize our wait queues */
1126 init_waitqueue_head(&mos7840_port
->wait_chase
);
1127 init_waitqueue_head(&mos7840_port
->delta_msr_wait
);
1129 /* initialize our icount structure */
1130 memset(&(mos7840_port
->icount
), 0x00, sizeof(mos7840_port
->icount
));
1132 /* initialize our port settings */
1133 /* Must set to enable ints! */
1134 mos7840_port
->shadowMCR
= MCR_MASTER_IE
;
1135 /* send a open port command */
1136 mos7840_port
->open
= 1;
1137 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1138 mos7840_port
->icount
.tx
= 0;
1139 mos7840_port
->icount
.rx
= 0;
1141 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p",
1142 serial
, mos7840_port
, port
);
1144 dbg ("%s leave", __func__
);
1150 /*****************************************************************************
1151 * mos7840_chars_in_buffer
1152 * this function is called by the tty driver when it wants to know how many
1153 * bytes of data we currently have outstanding in the port (data that has
1154 * been written, but hasn't made it out the port yet)
1155 * If successful, we return the number of bytes left to be written in the
1157 * Otherwise we return zero.
1158 *****************************************************************************/
1160 static int mos7840_chars_in_buffer(struct tty_struct
*tty
)
1162 struct usb_serial_port
*port
= tty
->driver_data
;
1165 unsigned long flags
;
1166 struct moschip_port
*mos7840_port
;
1168 dbg("%s", " mos7840_chars_in_buffer:entering ...........");
1170 if (mos7840_port_paranoia_check(port
, __func__
)) {
1171 dbg("%s", "Invalid port");
1175 mos7840_port
= mos7840_get_port_private(port
);
1176 if (mos7840_port
== NULL
) {
1177 dbg("%s", "mos7840_break:leaving ...........");
1181 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1182 for (i
= 0; i
< NUM_URBS
; ++i
)
1183 if (mos7840_port
->busy
[i
])
1184 chars
+= URB_TRANSFER_BUFFER_SIZE
;
1185 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1186 dbg("%s - returns %d", __func__
, chars
);
1191 /*****************************************************************************
1193 * this function is called by the tty driver when a port is closed
1194 *****************************************************************************/
1196 static void mos7840_close(struct usb_serial_port
*port
)
1198 struct usb_serial
*serial
;
1199 struct moschip_port
*mos7840_port
;
1200 struct moschip_port
*port0
;
1204 dbg("%s", "mos7840_close:entering...");
1206 if (mos7840_port_paranoia_check(port
, __func__
)) {
1207 dbg("%s", "Port Paranoia failed");
1211 serial
= mos7840_get_usb_serial(port
, __func__
);
1213 dbg("%s", "Serial Paranoia failed");
1217 mos7840_port
= mos7840_get_port_private(port
);
1218 port0
= mos7840_get_port_private(serial
->port
[0]);
1220 if (mos7840_port
== NULL
|| port0
== NULL
)
1223 for (j
= 0; j
< NUM_URBS
; ++j
)
1224 usb_kill_urb(mos7840_port
->write_urb_pool
[j
]);
1226 /* Freeing Write URBs */
1227 for (j
= 0; j
< NUM_URBS
; ++j
) {
1228 if (mos7840_port
->write_urb_pool
[j
]) {
1229 if (mos7840_port
->write_urb_pool
[j
]->transfer_buffer
)
1230 kfree(mos7840_port
->write_urb_pool
[j
]->
1233 usb_free_urb(mos7840_port
->write_urb_pool
[j
]);
1237 /* While closing port, shutdown all bulk read, write *
1238 * and interrupt read if they exists */
1240 if (mos7840_port
->write_urb
) {
1241 dbg("%s", "Shutdown bulk write");
1242 usb_kill_urb(mos7840_port
->write_urb
);
1244 if (mos7840_port
->read_urb
) {
1245 dbg("%s", "Shutdown bulk read");
1246 usb_kill_urb(mos7840_port
->read_urb
);
1247 mos7840_port
->read_urb_busy
= false;
1249 if ((&mos7840_port
->control_urb
)) {
1250 dbg("%s", "Shutdown control read");
1251 /*/ usb_kill_urb (mos7840_port->control_urb); */
1254 /* if(mos7840_port->ctrl_buf != NULL) */
1255 /* kfree(mos7840_port->ctrl_buf); */
1256 port0
->open_ports
--;
1257 dbg("mos7840_num_open_ports in close%d:in port%d",
1258 port0
->open_ports
, port
->number
);
1259 if (port0
->open_ports
== 0) {
1260 if (serial
->port
[0]->interrupt_in_urb
) {
1261 dbg("%s", "Shutdown interrupt_in_urb");
1262 usb_kill_urb(serial
->port
[0]->interrupt_in_urb
);
1266 if (mos7840_port
->write_urb
) {
1267 /* if this urb had a transfer buffer already (old tx) free it */
1268 if (mos7840_port
->write_urb
->transfer_buffer
!= NULL
)
1269 kfree(mos7840_port
->write_urb
->transfer_buffer
);
1270 usb_free_urb(mos7840_port
->write_urb
);
1274 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
1277 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
1279 mos7840_port
->open
= 0;
1281 dbg("%s", "Leaving ............");
1284 /************************************************************************
1286 * mos7840_block_until_chase_response
1288 * This function will block the close until one of the following:
1289 * 1. Response to our Chase comes from mos7840
1290 * 2. A timeout of 10 seconds without activity has expired
1291 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1293 ************************************************************************/
1295 static void mos7840_block_until_chase_response(struct tty_struct
*tty
,
1296 struct moschip_port
*mos7840_port
)
1298 int timeout
= 1 * HZ
;
1303 count
= mos7840_chars_in_buffer(tty
);
1305 /* Check for Buffer status */
1309 /* Block the thread for a while */
1310 interruptible_sleep_on_timeout(&mos7840_port
->wait_chase
,
1312 /* No activity.. count down section */
1315 dbg("%s - TIMEOUT", __func__
);
1318 /* Reset timeout value back to seconds */
1325 /*****************************************************************************
1327 * this function sends a break to the port
1328 *****************************************************************************/
1329 static void mos7840_break(struct tty_struct
*tty
, int break_state
)
1331 struct usb_serial_port
*port
= tty
->driver_data
;
1333 struct usb_serial
*serial
;
1334 struct moschip_port
*mos7840_port
;
1336 dbg("%s", "Entering ...........");
1337 dbg("mos7840_break: Start");
1339 if (mos7840_port_paranoia_check(port
, __func__
)) {
1340 dbg("%s", "Port Paranoia failed");
1344 serial
= mos7840_get_usb_serial(port
, __func__
);
1346 dbg("%s", "Serial Paranoia failed");
1350 mos7840_port
= mos7840_get_port_private(port
);
1352 if (mos7840_port
== NULL
)
1356 /* flush and block until tx is empty */
1357 mos7840_block_until_chase_response(tty
, mos7840_port
);
1359 if (break_state
== -1)
1360 data
= mos7840_port
->shadowLCR
| LCR_SET_BREAK
;
1362 data
= mos7840_port
->shadowLCR
& ~LCR_SET_BREAK
;
1364 /* FIXME: no locking on shadowLCR anywhere in driver */
1365 mos7840_port
->shadowLCR
= data
;
1366 dbg("mcs7840_break mos7840_port->shadowLCR is %x",
1367 mos7840_port
->shadowLCR
);
1368 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
,
1369 mos7840_port
->shadowLCR
);
1374 /*****************************************************************************
1375 * mos7840_write_room
1376 * this function is called by the tty driver when it wants to know how many
1377 * bytes of data we can accept for a specific port.
1378 * If successful, we return the amount of room that we have for this port
1379 * Otherwise we return a negative error number.
1380 *****************************************************************************/
1382 static int mos7840_write_room(struct tty_struct
*tty
)
1384 struct usb_serial_port
*port
= tty
->driver_data
;
1387 unsigned long flags
;
1388 struct moschip_port
*mos7840_port
;
1390 dbg("%s", " mos7840_write_room:entering ...........");
1392 if (mos7840_port_paranoia_check(port
, __func__
)) {
1393 dbg("%s", "Invalid port");
1394 dbg("%s", " mos7840_write_room:leaving ...........");
1398 mos7840_port
= mos7840_get_port_private(port
);
1399 if (mos7840_port
== NULL
) {
1400 dbg("%s", "mos7840_break:leaving ...........");
1404 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1405 for (i
= 0; i
< NUM_URBS
; ++i
) {
1406 if (!mos7840_port
->busy
[i
])
1407 room
+= URB_TRANSFER_BUFFER_SIZE
;
1409 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1411 room
= (room
== 0) ? 0 : room
- URB_TRANSFER_BUFFER_SIZE
+ 1;
1412 dbg("%s - returns %d", __func__
, room
);
1417 /*****************************************************************************
1419 * this function is called by the tty driver when data should be written to
1421 * If successful, we return the number of bytes written, otherwise we
1422 * return a negative error number.
1423 *****************************************************************************/
1425 static int mos7840_write(struct tty_struct
*tty
, struct usb_serial_port
*port
,
1426 const unsigned char *data
, int count
)
1432 unsigned long flags
;
1434 struct moschip_port
*mos7840_port
;
1435 struct usb_serial
*serial
;
1438 const unsigned char *current_position
= data
;
1439 unsigned char *data1
;
1440 dbg("%s", "entering ...........");
1441 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1442 mos7840_port->shadowLCR); */
1446 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
1447 mos7840_port
->shadowLCR
= Data
;
1448 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data
);
1449 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1450 mos7840_port
->shadowLCR
);
1453 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1454 /* mos7840_port->shadowLCR=Data;//Need to add later */
1456 Data
|= SERIAL_LCR_DLAB
; /* data latch enable in LCR 0x80 */
1457 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1460 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1462 status
= mos7840_get_uart_reg(port
, DIVISOR_LATCH_LSB
, &Data
);
1463 dbg("mos7840_write:DLL value is %x", Data
);
1466 status
= mos7840_get_uart_reg(port
, DIVISOR_LATCH_MSB
, &Data
);
1467 dbg("mos7840_write:DLM value is %x", Data
);
1469 Data
= Data
& ~SERIAL_LCR_DLAB
;
1470 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1471 mos7840_port
->shadowLCR
);
1472 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1475 if (mos7840_port_paranoia_check(port
, __func__
)) {
1476 dbg("%s", "Port Paranoia failed");
1480 serial
= port
->serial
;
1481 if (mos7840_serial_paranoia_check(serial
, __func__
)) {
1482 dbg("%s", "Serial Paranoia failed");
1486 mos7840_port
= mos7840_get_port_private(port
);
1487 if (mos7840_port
== NULL
) {
1488 dbg("%s", "mos7840_port is NULL");
1492 /* try to find a free urb in the list */
1495 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1496 for (i
= 0; i
< NUM_URBS
; ++i
) {
1497 if (!mos7840_port
->busy
[i
]) {
1498 mos7840_port
->busy
[i
] = 1;
1499 urb
= mos7840_port
->write_urb_pool
[i
];
1504 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1507 dbg("%s - no more free urbs", __func__
);
1511 if (urb
->transfer_buffer
== NULL
) {
1512 urb
->transfer_buffer
=
1513 kmalloc(URB_TRANSFER_BUFFER_SIZE
, GFP_KERNEL
);
1515 if (urb
->transfer_buffer
== NULL
) {
1516 dev_err(&port
->dev
, "%s no more kernel memory...\n",
1521 transfer_size
= min(count
, URB_TRANSFER_BUFFER_SIZE
);
1523 memcpy(urb
->transfer_buffer
, current_position
, transfer_size
);
1525 /* fill urb with data and submit */
1526 usb_fill_bulk_urb(urb
,
1528 usb_sndbulkpipe(serial
->dev
,
1529 port
->bulk_out_endpointAddress
),
1530 urb
->transfer_buffer
,
1532 mos7840_bulk_out_data_callback
, mos7840_port
);
1534 data1
= urb
->transfer_buffer
;
1535 dbg("bulkout endpoint is %d", port
->bulk_out_endpointAddress
);
1537 /* send it down the pipe */
1538 status
= usb_submit_urb(urb
, GFP_ATOMIC
);
1541 mos7840_port
->busy
[i
] = 0;
1542 dev_err(&port
->dev
, "%s - usb_submit_urb(write bulk) failed "
1543 "with status = %d\n", __func__
, status
);
1544 bytes_sent
= status
;
1547 bytes_sent
= transfer_size
;
1548 mos7840_port
->icount
.tx
+= transfer_size
;
1550 dbg("mos7840_port->icount.tx is %d:", mos7840_port
->icount
.tx
);
1556 /*****************************************************************************
1558 * this function is called by the tty driver when it wants to stop the data
1559 * being read from the port.
1560 *****************************************************************************/
1562 static void mos7840_throttle(struct tty_struct
*tty
)
1564 struct usb_serial_port
*port
= tty
->driver_data
;
1565 struct moschip_port
*mos7840_port
;
1568 if (mos7840_port_paranoia_check(port
, __func__
)) {
1569 dbg("%s", "Invalid port");
1573 dbg("- port %d", port
->number
);
1575 mos7840_port
= mos7840_get_port_private(port
);
1577 if (mos7840_port
== NULL
)
1580 if (!mos7840_port
->open
) {
1581 dbg("%s", "port not opened");
1585 dbg("%s", "Entering ..........");
1587 /* if we are implementing XON/XOFF, send the stop character */
1589 unsigned char stop_char
= STOP_CHAR(tty
);
1590 status
= mos7840_write(tty
, port
, &stop_char
, 1);
1594 /* if we are implementing RTS/CTS, toggle that line */
1595 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1596 mos7840_port
->shadowMCR
&= ~MCR_RTS
;
1597 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1598 mos7840_port
->shadowMCR
);
1606 /*****************************************************************************
1607 * mos7840_unthrottle
1608 * this function is called by the tty driver when it wants to resume
1609 * the data being read from the port (called after mos7840_throttle is
1611 *****************************************************************************/
1612 static void mos7840_unthrottle(struct tty_struct
*tty
)
1614 struct usb_serial_port
*port
= tty
->driver_data
;
1616 struct moschip_port
*mos7840_port
= mos7840_get_port_private(port
);
1618 if (mos7840_port_paranoia_check(port
, __func__
)) {
1619 dbg("%s", "Invalid port");
1623 if (mos7840_port
== NULL
)
1626 if (!mos7840_port
->open
) {
1627 dbg("%s - port not opened", __func__
);
1631 dbg("%s", "Entering ..........");
1633 /* if we are implementing XON/XOFF, send the start character */
1635 unsigned char start_char
= START_CHAR(tty
);
1636 status
= mos7840_write(tty
, port
, &start_char
, 1);
1641 /* if we are implementing RTS/CTS, toggle that line */
1642 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1643 mos7840_port
->shadowMCR
|= MCR_RTS
;
1644 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1645 mos7840_port
->shadowMCR
);
1651 static int mos7840_tiocmget(struct tty_struct
*tty
, struct file
*file
)
1653 struct usb_serial_port
*port
= tty
->driver_data
;
1654 struct moschip_port
*mos7840_port
;
1655 unsigned int result
;
1659 mos7840_port
= mos7840_get_port_private(port
);
1661 dbg("%s - port %d", __func__
, port
->number
);
1663 if (mos7840_port
== NULL
)
1666 status
= mos7840_get_uart_reg(port
, MODEM_STATUS_REGISTER
, &msr
);
1667 status
= mos7840_get_uart_reg(port
, MODEM_CONTROL_REGISTER
, &mcr
);
1668 result
= ((mcr
& MCR_DTR
) ? TIOCM_DTR
: 0)
1669 | ((mcr
& MCR_RTS
) ? TIOCM_RTS
: 0)
1670 | ((mcr
& MCR_LOOPBACK
) ? TIOCM_LOOP
: 0)
1671 | ((msr
& MOS7840_MSR_CTS
) ? TIOCM_CTS
: 0)
1672 | ((msr
& MOS7840_MSR_CD
) ? TIOCM_CAR
: 0)
1673 | ((msr
& MOS7840_MSR_RI
) ? TIOCM_RI
: 0)
1674 | ((msr
& MOS7840_MSR_DSR
) ? TIOCM_DSR
: 0);
1676 dbg("%s - 0x%04X", __func__
, result
);
1681 static int mos7840_tiocmset(struct tty_struct
*tty
, struct file
*file
,
1682 unsigned int set
, unsigned int clear
)
1684 struct usb_serial_port
*port
= tty
->driver_data
;
1685 struct moschip_port
*mos7840_port
;
1689 dbg("%s - port %d", __func__
, port
->number
);
1691 mos7840_port
= mos7840_get_port_private(port
);
1693 if (mos7840_port
== NULL
)
1696 /* FIXME: What locks the port registers ? */
1697 mcr
= mos7840_port
->shadowMCR
;
1698 if (clear
& TIOCM_RTS
)
1700 if (clear
& TIOCM_DTR
)
1702 if (clear
& TIOCM_LOOP
)
1703 mcr
&= ~MCR_LOOPBACK
;
1705 if (set
& TIOCM_RTS
)
1707 if (set
& TIOCM_DTR
)
1709 if (set
& TIOCM_LOOP
)
1710 mcr
|= MCR_LOOPBACK
;
1712 mos7840_port
->shadowMCR
= mcr
;
1714 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, mcr
);
1716 dbg("setting MODEM_CONTROL_REGISTER Failed");
1723 /*****************************************************************************
1724 * mos7840_calc_baud_rate_divisor
1725 * this function calculates the proper baud rate divisor for the specified
1727 *****************************************************************************/
1728 static int mos7840_calc_baud_rate_divisor(int baudRate
, int *divisor
,
1732 dbg("%s - %d", __func__
, baudRate
);
1734 if (baudRate
<= 115200) {
1735 *divisor
= 115200 / baudRate
;
1738 if ((baudRate
> 115200) && (baudRate
<= 230400)) {
1739 *divisor
= 230400 / baudRate
;
1740 *clk_sel_val
= 0x10;
1741 } else if ((baudRate
> 230400) && (baudRate
<= 403200)) {
1742 *divisor
= 403200 / baudRate
;
1743 *clk_sel_val
= 0x20;
1744 } else if ((baudRate
> 403200) && (baudRate
<= 460800)) {
1745 *divisor
= 460800 / baudRate
;
1746 *clk_sel_val
= 0x30;
1747 } else if ((baudRate
> 460800) && (baudRate
<= 806400)) {
1748 *divisor
= 806400 / baudRate
;
1749 *clk_sel_val
= 0x40;
1750 } else if ((baudRate
> 806400) && (baudRate
<= 921600)) {
1751 *divisor
= 921600 / baudRate
;
1752 *clk_sel_val
= 0x50;
1753 } else if ((baudRate
> 921600) && (baudRate
<= 1572864)) {
1754 *divisor
= 1572864 / baudRate
;
1755 *clk_sel_val
= 0x60;
1756 } else if ((baudRate
> 1572864) && (baudRate
<= 3145728)) {
1757 *divisor
= 3145728 / baudRate
;
1758 *clk_sel_val
= 0x70;
1764 for (i
= 0; i
< ARRAY_SIZE(mos7840_divisor_table
); i
++) {
1765 if (mos7840_divisor_table
[i
].BaudRate
== baudrate
) {
1766 *divisor
= mos7840_divisor_table
[i
].Divisor
;
1771 /* After trying for all the standard baud rates *
1772 * Try calculating the divisor for this baud rate */
1774 if (baudrate
> 75 && baudrate
< 230400) {
1775 /* get the divisor */
1776 custom
= (__u16
) (230400L / baudrate
);
1778 /* Check for round off */
1779 round1
= (__u16
) (2304000L / baudrate
);
1780 round
= (__u16
) (round1
- (custom
* 10));
1785 dbg(" Baud %d = %d", baudrate
, custom
);
1789 dbg("%s", " Baud calculation Failed...");
1794 /*****************************************************************************
1795 * mos7840_send_cmd_write_baud_rate
1796 * this function sends the proper command to change the baud rate of the
1798 *****************************************************************************/
1800 static int mos7840_send_cmd_write_baud_rate(struct moschip_port
*mos7840_port
,
1806 unsigned char number
;
1808 struct usb_serial_port
*port
;
1810 if (mos7840_port
== NULL
)
1813 port
= (struct usb_serial_port
*)mos7840_port
->port
;
1814 if (mos7840_port_paranoia_check(port
, __func__
)) {
1815 dbg("%s", "Invalid port");
1819 if (mos7840_serial_paranoia_check(port
->serial
, __func__
)) {
1820 dbg("%s", "Invalid Serial");
1824 dbg("%s", "Entering ..........");
1826 number
= mos7840_port
->port
->number
- mos7840_port
->port
->serial
->minor
;
1828 dbg("%s - port = %d, baud = %d", __func__
,
1829 mos7840_port
->port
->number
, baudRate
);
1830 /* reset clk_uart_sel in spregOffset */
1831 if (baudRate
> 115200) {
1832 #ifdef HW_flow_control
1833 /* NOTE: need to see the pther register to modify */
1834 /* setting h/w flow control bit to 1 */
1836 mos7840_port
->shadowMCR
= Data
;
1837 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1840 dbg("Writing spreg failed in set_serial_baud");
1846 #ifdef HW_flow_control
1847 / *setting h
/w flow control bit to
0 */
1849 mos7840_port
->shadowMCR
= Data
;
1850 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1853 dbg("Writing spreg failed in set_serial_baud");
1860 if (1) { /* baudRate <= 115200) */
1863 status
= mos7840_calc_baud_rate_divisor(baudRate
, &divisor
,
1865 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
,
1868 dbg("reading spreg failed in set_serial_baud");
1871 Data
= (Data
& 0x8f) | clk_sel_val
;
1872 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
,
1875 dbg("Writing spreg failed in set_serial_baud");
1878 /* Calculate the Divisor */
1881 dev_err(&port
->dev
, "%s - bad baud rate\n", __func__
);
1884 /* Enable access to divisor latch */
1885 Data
= mos7840_port
->shadowLCR
| SERIAL_LCR_DLAB
;
1886 mos7840_port
->shadowLCR
= Data
;
1887 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1889 /* Write the divisor */
1890 Data
= (unsigned char)(divisor
& 0xff);
1891 dbg("set_serial_baud Value to write DLL is %x", Data
);
1892 mos7840_set_uart_reg(port
, DIVISOR_LATCH_LSB
, Data
);
1894 Data
= (unsigned char)((divisor
& 0xff00) >> 8);
1895 dbg("set_serial_baud Value to write DLM is %x", Data
);
1896 mos7840_set_uart_reg(port
, DIVISOR_LATCH_MSB
, Data
);
1898 /* Disable access to divisor latch */
1899 Data
= mos7840_port
->shadowLCR
& ~SERIAL_LCR_DLAB
;
1900 mos7840_port
->shadowLCR
= Data
;
1901 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1907 /*****************************************************************************
1908 * mos7840_change_port_settings
1909 * This routine is called to set the UART on the device to match
1910 * the specified new settings.
1911 *****************************************************************************/
1913 static void mos7840_change_port_settings(struct tty_struct
*tty
,
1914 struct moschip_port
*mos7840_port
, struct ktermios
*old_termios
)
1924 struct usb_serial_port
*port
;
1925 struct usb_serial
*serial
;
1927 if (mos7840_port
== NULL
)
1930 port
= (struct usb_serial_port
*)mos7840_port
->port
;
1932 if (mos7840_port_paranoia_check(port
, __func__
)) {
1933 dbg("%s", "Invalid port");
1937 if (mos7840_serial_paranoia_check(port
->serial
, __func__
)) {
1938 dbg("%s", "Invalid Serial");
1942 serial
= port
->serial
;
1944 dbg("%s - port %d", __func__
, mos7840_port
->port
->number
);
1946 if (!mos7840_port
->open
) {
1947 dbg("%s - port not opened", __func__
);
1951 dbg("%s", "Entering ..........");
1955 lParity
= LCR_PAR_NONE
;
1957 cflag
= tty
->termios
->c_cflag
;
1958 iflag
= tty
->termios
->c_iflag
;
1960 /* Change the number of bits */
1961 if (cflag
& CSIZE
) {
1962 switch (cflag
& CSIZE
) {
1980 /* Change the Parity bit */
1981 if (cflag
& PARENB
) {
1982 if (cflag
& PARODD
) {
1983 lParity
= LCR_PAR_ODD
;
1984 dbg("%s - parity = odd", __func__
);
1986 lParity
= LCR_PAR_EVEN
;
1987 dbg("%s - parity = even", __func__
);
1991 dbg("%s - parity = none", __func__
);
1995 lParity
= lParity
| 0x20;
1997 /* Change the Stop bit */
1998 if (cflag
& CSTOPB
) {
2000 dbg("%s - stop bits = 2", __func__
);
2003 dbg("%s - stop bits = 1", __func__
);
2006 /* Update the LCR with the correct value */
2007 mos7840_port
->shadowLCR
&=
2008 ~(LCR_BITS_MASK
| LCR_STOP_MASK
| LCR_PAR_MASK
);
2009 mos7840_port
->shadowLCR
|= (lData
| lParity
| lStop
);
2011 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x",
2012 mos7840_port
->shadowLCR
);
2013 /* Disable Interrupts */
2015 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
2018 mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
2021 mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
2023 /* Send the updated LCR value to the mos7840 */
2024 Data
= mos7840_port
->shadowLCR
;
2026 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
2029 mos7840_port
->shadowMCR
= Data
;
2030 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2032 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2034 /* set up the MCR register and send it to the mos7840 */
2036 mos7840_port
->shadowMCR
= MCR_MASTER_IE
;
2038 mos7840_port
->shadowMCR
|= (MCR_DTR
| MCR_RTS
);
2040 if (cflag
& CRTSCTS
)
2041 mos7840_port
->shadowMCR
|= (MCR_XON_ANY
);
2043 mos7840_port
->shadowMCR
&= ~(MCR_XON_ANY
);
2045 Data
= mos7840_port
->shadowMCR
;
2046 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2048 /* Determine divisor based on baud rate */
2049 baud
= tty_get_baud_rate(tty
);
2052 /* pick a default, any default... */
2053 dbg("%s", "Picked default baud...");
2057 dbg("%s - baud rate = %d", __func__
, baud
);
2058 status
= mos7840_send_cmd_write_baud_rate(mos7840_port
, baud
);
2060 /* Enable Interrupts */
2062 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
2064 if (mos7840_port
->read_urb_busy
== false) {
2065 mos7840_port
->read_urb
->dev
= serial
->dev
;
2066 mos7840_port
->read_urb_busy
= true;
2067 status
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
2069 dbg("usb_submit_urb(read bulk) failed, status = %d",
2071 mos7840_port
->read_urb_busy
= false;
2074 wake_up(&mos7840_port
->delta_msr_wait
);
2075 mos7840_port
->delta_msr_cond
= 1;
2076 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x",
2077 mos7840_port
->shadowLCR
);
2082 /*****************************************************************************
2083 * mos7840_set_termios
2084 * this function is called by the tty driver when it wants to change
2085 * the termios structure
2086 *****************************************************************************/
2088 static void mos7840_set_termios(struct tty_struct
*tty
,
2089 struct usb_serial_port
*port
,
2090 struct ktermios
*old_termios
)
2094 struct usb_serial
*serial
;
2095 struct moschip_port
*mos7840_port
;
2096 dbg("mos7840_set_termios: START");
2097 if (mos7840_port_paranoia_check(port
, __func__
)) {
2098 dbg("%s", "Invalid port");
2102 serial
= port
->serial
;
2104 if (mos7840_serial_paranoia_check(serial
, __func__
)) {
2105 dbg("%s", "Invalid Serial");
2109 mos7840_port
= mos7840_get_port_private(port
);
2111 if (mos7840_port
== NULL
)
2114 if (!mos7840_port
->open
) {
2115 dbg("%s - port not opened", __func__
);
2119 dbg("%s", "setting termios - ");
2121 cflag
= tty
->termios
->c_cflag
;
2123 dbg("%s - clfag %08x iflag %08x", __func__
,
2124 tty
->termios
->c_cflag
, RELEVANT_IFLAG(tty
->termios
->c_iflag
));
2125 dbg("%s - old clfag %08x old iflag %08x", __func__
,
2126 old_termios
->c_cflag
, RELEVANT_IFLAG(old_termios
->c_iflag
));
2127 dbg("%s - port %d", __func__
, port
->number
);
2129 /* change the port settings to the new ones specified */
2131 mos7840_change_port_settings(tty
, mos7840_port
, old_termios
);
2133 if (!mos7840_port
->read_urb
) {
2134 dbg("%s", "URB KILLED !!!!!");
2138 if (mos7840_port
->read_urb_busy
== false) {
2139 mos7840_port
->read_urb
->dev
= serial
->dev
;
2140 mos7840_port
->read_urb_busy
= true;
2141 status
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
2143 dbg("usb_submit_urb(read bulk) failed, status = %d",
2145 mos7840_port
->read_urb_busy
= false;
2151 /*****************************************************************************
2152 * mos7840_get_lsr_info - get line status register info
2154 * Purpose: Let user call ioctl() to get info when the UART physically
2155 * is emptied. On bus types like RS485, the transmitter must
2156 * release the bus after transmitting. This must be done when
2157 * the transmit shift register is empty, not be done when the
2158 * transmit holding register is empty. This functionality
2159 * allows an RS485 driver to be written in user space.
2160 *****************************************************************************/
2162 static int mos7840_get_lsr_info(struct tty_struct
*tty
,
2163 unsigned int __user
*value
)
2166 unsigned int result
= 0;
2168 count
= mos7840_chars_in_buffer(tty
);
2170 dbg("%s -- Empty", __func__
);
2171 result
= TIOCSER_TEMT
;
2174 if (copy_to_user(value
, &result
, sizeof(int)))
2179 /*****************************************************************************
2180 * mos7840_get_serial_info
2181 * function to get information about serial port
2182 *****************************************************************************/
2184 static int mos7840_get_serial_info(struct moschip_port
*mos7840_port
,
2185 struct serial_struct __user
*retinfo
)
2187 struct serial_struct tmp
;
2189 if (mos7840_port
== NULL
)
2195 memset(&tmp
, 0, sizeof(tmp
));
2197 tmp
.type
= PORT_16550A
;
2198 tmp
.line
= mos7840_port
->port
->serial
->minor
;
2199 tmp
.port
= mos7840_port
->port
->number
;
2201 tmp
.flags
= ASYNC_SKIP_TEST
| ASYNC_AUTO_IRQ
;
2202 tmp
.xmit_fifo_size
= NUM_URBS
* URB_TRANSFER_BUFFER_SIZE
;
2203 tmp
.baud_base
= 9600;
2204 tmp
.close_delay
= 5 * HZ
;
2205 tmp
.closing_wait
= 30 * HZ
;
2207 if (copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)))
2212 /*****************************************************************************
2214 * this function handles any ioctl calls to the driver
2215 *****************************************************************************/
2217 static int mos7840_ioctl(struct tty_struct
*tty
, struct file
*file
,
2218 unsigned int cmd
, unsigned long arg
)
2220 struct usb_serial_port
*port
= tty
->driver_data
;
2221 void __user
*argp
= (void __user
*)arg
;
2222 struct moschip_port
*mos7840_port
;
2224 struct async_icount cnow
;
2225 struct async_icount cprev
;
2226 struct serial_icounter_struct icount
;
2228 if (mos7840_port_paranoia_check(port
, __func__
)) {
2229 dbg("%s", "Invalid port");
2233 mos7840_port
= mos7840_get_port_private(port
);
2235 if (mos7840_port
== NULL
)
2238 dbg("%s - port %d, cmd = 0x%x", __func__
, port
->number
, cmd
);
2241 /* return number of bytes available */
2244 dbg("%s (%d) TIOCSERGETLSR", __func__
, port
->number
);
2245 return mos7840_get_lsr_info(tty
, argp
);
2249 dbg("%s (%d) TIOCGSERIAL", __func__
, port
->number
);
2250 return mos7840_get_serial_info(mos7840_port
, argp
);
2253 dbg("%s (%d) TIOCSSERIAL", __func__
, port
->number
);
2257 dbg("%s (%d) TIOCMIWAIT", __func__
, port
->number
);
2258 cprev
= mos7840_port
->icount
;
2260 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2261 mos7840_port
->delta_msr_cond
= 0;
2262 wait_event_interruptible(mos7840_port
->delta_msr_wait
,
2264 delta_msr_cond
== 1));
2266 /* see if a signal did it */
2267 if (signal_pending(current
))
2268 return -ERESTARTSYS
;
2269 cnow
= mos7840_port
->icount
;
2271 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
2272 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
)
2273 return -EIO
; /* no change => error */
2274 if (((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
.rng
)) ||
2275 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
.dsr
)) ||
2276 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
.dcd
)) ||
2277 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
.cts
))) {
2286 cnow
= mos7840_port
->icount
;
2288 icount
.cts
= cnow
.cts
;
2289 icount
.dsr
= cnow
.dsr
;
2290 icount
.rng
= cnow
.rng
;
2291 icount
.dcd
= cnow
.dcd
;
2292 icount
.rx
= cnow
.rx
;
2293 icount
.tx
= cnow
.tx
;
2294 icount
.frame
= cnow
.frame
;
2295 icount
.overrun
= cnow
.overrun
;
2296 icount
.parity
= cnow
.parity
;
2297 icount
.brk
= cnow
.brk
;
2298 icount
.buf_overrun
= cnow
.buf_overrun
;
2300 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__
,
2301 port
->number
, icount
.rx
, icount
.tx
);
2302 if (copy_to_user(argp
, &icount
, sizeof(icount
)))
2308 return -ENOIOCTLCMD
;
2311 static int mos7840_calc_num_ports(struct usb_serial
*serial
)
2313 int mos7840_num_ports
= 0;
2315 dbg("numberofendpoints: cur %d, alt %d",
2316 (int)serial
->interface
->cur_altsetting
->desc
.bNumEndpoints
,
2317 (int)serial
->interface
->altsetting
->desc
.bNumEndpoints
);
2318 if (serial
->interface
->cur_altsetting
->desc
.bNumEndpoints
== 5) {
2319 mos7840_num_ports
= serial
->num_ports
= 2;
2320 } else if (serial
->interface
->cur_altsetting
->desc
.bNumEndpoints
== 9) {
2321 serial
->num_bulk_in
= 4;
2322 serial
->num_bulk_out
= 4;
2323 mos7840_num_ports
= serial
->num_ports
= 4;
2325 dbg ("mos7840_num_ports = %d", mos7840_num_ports
);
2326 return mos7840_num_ports
;
2329 /****************************************************************************
2331 ****************************************************************************/
2333 static int mos7840_startup(struct usb_serial
*serial
)
2335 struct moschip_port
*mos7840_port
;
2336 struct usb_device
*dev
;
2340 dbg("%s", "mos7840_startup :Entering..........");
2343 dbg("%s", "Invalid Handler");
2349 dbg("%s", "Entering...");
2350 dbg ("mos7840_startup: serial = %p", serial
);
2352 /* we set up the pointers to the endpoints in the mos7840_open *
2353 * function, as the structures aren't created yet. */
2355 /* set up port private structures */
2356 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2357 dbg ("mos7840_startup: configuring port %d............", i
);
2358 mos7840_port
= kzalloc(sizeof(struct moschip_port
), GFP_KERNEL
);
2359 if (mos7840_port
== NULL
) {
2360 dev_err(&dev
->dev
, "%s - Out of memory\n", __func__
);
2362 i
--; /* don't follow NULL pointer cleaning up */
2366 /* Initialize all port interrupt end point to port 0 int
2367 * endpoint. Our device has only one interrupt end point
2368 * common to all port */
2370 mos7840_port
->port
= serial
->port
[i
];
2371 mos7840_set_port_private(serial
->port
[i
], mos7840_port
);
2372 spin_lock_init(&mos7840_port
->pool_lock
);
2374 /* minor is not initialised until later by
2375 * usb-serial.c:get_free_serial() and cannot therefore be used
2376 * to index device instances */
2377 mos7840_port
->port_num
= i
+ 1;
2378 dbg ("serial->port[i]->number = %d", serial
->port
[i
]->number
);
2379 dbg ("serial->port[i]->serial->minor = %d", serial
->port
[i
]->serial
->minor
);
2380 dbg ("mos7840_port->port_num = %d", mos7840_port
->port_num
);
2381 dbg ("serial->minor = %d", serial
->minor
);
2383 if (mos7840_port
->port_num
== 1) {
2384 mos7840_port
->SpRegOffset
= 0x0;
2385 mos7840_port
->ControlRegOffset
= 0x1;
2386 mos7840_port
->DcrRegOffset
= 0x4;
2387 } else if ((mos7840_port
->port_num
== 2)
2388 && (serial
->num_ports
== 4)) {
2389 mos7840_port
->SpRegOffset
= 0x8;
2390 mos7840_port
->ControlRegOffset
= 0x9;
2391 mos7840_port
->DcrRegOffset
= 0x16;
2392 } else if ((mos7840_port
->port_num
== 2)
2393 && (serial
->num_ports
== 2)) {
2394 mos7840_port
->SpRegOffset
= 0xa;
2395 mos7840_port
->ControlRegOffset
= 0xb;
2396 mos7840_port
->DcrRegOffset
= 0x19;
2397 } else if ((mos7840_port
->port_num
== 3)
2398 && (serial
->num_ports
== 4)) {
2399 mos7840_port
->SpRegOffset
= 0xa;
2400 mos7840_port
->ControlRegOffset
= 0xb;
2401 mos7840_port
->DcrRegOffset
= 0x19;
2402 } else if ((mos7840_port
->port_num
== 4)
2403 && (serial
->num_ports
== 4)) {
2404 mos7840_port
->SpRegOffset
= 0xc;
2405 mos7840_port
->ControlRegOffset
= 0xd;
2406 mos7840_port
->DcrRegOffset
= 0x1c;
2408 mos7840_dump_serial_port(mos7840_port
);
2409 mos7840_set_port_private(serial
->port
[i
], mos7840_port
);
2411 /* enable rx_disable bit in control register */
2412 status
= mos7840_get_reg_sync(serial
->port
[i
],
2413 mos7840_port
->ControlRegOffset
, &Data
);
2415 dbg("Reading ControlReg failed status-0x%x", status
);
2418 dbg("ControlReg Reading success val is %x, status%d",
2420 Data
|= 0x08; /* setting driver done bit */
2421 Data
|= 0x04; /* sp1_bit to have cts change reflect in
2424 /* Data |= 0x20; //rx_disable bit */
2425 status
= mos7840_set_reg_sync(serial
->port
[i
],
2426 mos7840_port
->ControlRegOffset
, Data
);
2428 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status
);
2431 dbg("ControlReg Writing success(rx_disable) status%d",
2434 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2437 status
= mos7840_set_reg_sync(serial
->port
[i
],
2438 (__u16
) (mos7840_port
->DcrRegOffset
+ 0), Data
);
2440 dbg("Writing DCR0 failed status-0x%x", status
);
2443 dbg("DCR0 Writing success status%d", status
);
2446 status
= mos7840_set_reg_sync(serial
->port
[i
],
2447 (__u16
) (mos7840_port
->DcrRegOffset
+ 1), Data
);
2449 dbg("Writing DCR1 failed status-0x%x", status
);
2452 dbg("DCR1 Writing success status%d", status
);
2455 status
= mos7840_set_reg_sync(serial
->port
[i
],
2456 (__u16
) (mos7840_port
->DcrRegOffset
+ 2), Data
);
2458 dbg("Writing DCR2 failed status-0x%x", status
);
2461 dbg("DCR2 Writing success status%d", status
);
2463 /* write values in clkstart0x0 and clkmulti 0x20 */
2465 status
= mos7840_set_reg_sync(serial
->port
[i
],
2466 CLK_START_VALUE_REGISTER
, Data
);
2468 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status
);
2471 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status
);
2474 status
= mos7840_set_reg_sync(serial
->port
[i
],
2475 CLK_MULTI_REGISTER
, Data
);
2477 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x",
2481 dbg("CLK_MULTI_REGISTER Writing success status%d",
2484 /* write value 0x0 to scratchpad register */
2486 status
= mos7840_set_uart_reg(serial
->port
[i
],
2487 SCRATCH_PAD_REGISTER
, Data
);
2489 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x",
2493 dbg("SCRATCH_PAD_REGISTER Writing success status%d",
2496 /* Zero Length flag register */
2497 if ((mos7840_port
->port_num
!= 1)
2498 && (serial
->num_ports
== 2)) {
2501 status
= mos7840_set_reg_sync(serial
->port
[i
],
2503 ((__u16
)mos7840_port
->port_num
)), Data
);
2504 dbg("ZLIP offset %x",
2506 ((__u16
) mos7840_port
->port_num
)));
2508 dbg("Writing ZLP_REG%d failed status-0x%x",
2512 dbg("ZLP_REG%d Writing success status%d",
2516 status
= mos7840_set_reg_sync(serial
->port
[i
],
2518 ((__u16
)mos7840_port
->port_num
) - 0x1), Data
);
2519 dbg("ZLIP offset %x",
2521 ((__u16
) mos7840_port
->port_num
) - 0x1));
2523 dbg("Writing ZLP_REG%d failed status-0x%x",
2527 dbg("ZLP_REG%d Writing success status%d",
2531 mos7840_port
->control_urb
= usb_alloc_urb(0, GFP_KERNEL
);
2532 mos7840_port
->ctrl_buf
= kmalloc(16, GFP_KERNEL
);
2533 mos7840_port
->dr
= kmalloc(sizeof(struct usb_ctrlrequest
),
2535 if (!mos7840_port
->control_urb
|| !mos7840_port
->ctrl_buf
||
2536 !mos7840_port
->dr
) {
2541 dbg ("mos7840_startup: all ports configured...........");
2543 /* Zero Length flag enable */
2545 status
= mos7840_set_reg_sync(serial
->port
[0], ZLP_REG5
, Data
);
2547 dbg("Writing ZLP_REG5 failed status-0x%x", status
);
2550 dbg("ZLP_REG5 Writing success status%d", status
);
2552 /* setting configuration feature to one */
2553 usb_control_msg(serial
->dev
, usb_sndctrlpipe(serial
->dev
, 0),
2554 (__u8
) 0x03, 0x00, 0x01, 0x00, NULL
, 0x00, 5 * HZ
);
2557 for (/* nothing */; i
>= 0; i
--) {
2558 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
2560 kfree(mos7840_port
->dr
);
2561 kfree(mos7840_port
->ctrl_buf
);
2562 usb_free_urb(mos7840_port
->control_urb
);
2563 kfree(mos7840_port
);
2564 serial
->port
[i
] = NULL
;
2569 /****************************************************************************
2570 * mos7840_disconnect
2571 * This function is called whenever the device is removed from the usb bus.
2572 ****************************************************************************/
2574 static void mos7840_disconnect(struct usb_serial
*serial
)
2577 unsigned long flags
;
2578 struct moschip_port
*mos7840_port
;
2579 dbg("%s", " disconnect :entering..........");
2582 dbg("%s", "Invalid Handler");
2586 /* check for the ports to be closed,close the ports and disconnect */
2588 /* free private structure allocated for serial port *
2589 * stop reads and writes on all ports */
2591 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2592 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
2593 dbg ("mos7840_port %d = %p", i
, mos7840_port
);
2595 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
2596 mos7840_port
->zombie
= 1;
2597 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
2598 usb_kill_urb(mos7840_port
->control_urb
);
2602 dbg("%s", "Thank u :: ");
2606 /****************************************************************************
2608 * This function is called when the usb_serial structure is freed.
2609 ****************************************************************************/
2611 static void mos7840_release(struct usb_serial
*serial
)
2614 struct moschip_port
*mos7840_port
;
2615 dbg("%s", " release :entering..........");
2618 dbg("%s", "Invalid Handler");
2622 /* check for the ports to be closed,close the ports and disconnect */
2624 /* free private structure allocated for serial port *
2625 * stop reads and writes on all ports */
2627 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2628 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
2629 dbg("mos7840_port %d = %p", i
, mos7840_port
);
2631 kfree(mos7840_port
->ctrl_buf
);
2632 kfree(mos7840_port
->dr
);
2633 kfree(mos7840_port
);
2637 dbg("%s", "Thank u :: ");
2641 static struct usb_driver io_driver
= {
2643 .probe
= usb_serial_probe
,
2644 .disconnect
= usb_serial_disconnect
,
2645 .id_table
= moschip_id_table_combined
,
2649 static struct usb_serial_driver moschip7840_4port_device
= {
2651 .owner
= THIS_MODULE
,
2654 .description
= DRIVER_DESC
,
2655 .usb_driver
= &io_driver
,
2656 .id_table
= moschip_port_id_table
,
2658 .open
= mos7840_open
,
2659 .close
= mos7840_close
,
2660 .write
= mos7840_write
,
2661 .write_room
= mos7840_write_room
,
2662 .chars_in_buffer
= mos7840_chars_in_buffer
,
2663 .throttle
= mos7840_throttle
,
2664 .unthrottle
= mos7840_unthrottle
,
2665 .calc_num_ports
= mos7840_calc_num_ports
,
2666 #ifdef MCSSerialProbe
2667 .probe
= mos7840_serial_probe
,
2669 .ioctl
= mos7840_ioctl
,
2670 .set_termios
= mos7840_set_termios
,
2671 .break_ctl
= mos7840_break
,
2672 .tiocmget
= mos7840_tiocmget
,
2673 .tiocmset
= mos7840_tiocmset
,
2674 .attach
= mos7840_startup
,
2675 .disconnect
= mos7840_disconnect
,
2676 .release
= mos7840_release
,
2677 .read_bulk_callback
= mos7840_bulk_in_callback
,
2678 .read_int_callback
= mos7840_interrupt_callback
,
2681 /****************************************************************************
2683 * This is called by the module subsystem, or on startup to initialize us
2684 ****************************************************************************/
2685 static int __init
moschip7840_init(void)
2689 dbg("%s", " mos7840_init :entering..........");
2691 /* Register with the usb serial */
2692 retval
= usb_serial_register(&moschip7840_4port_device
);
2695 goto failed_port_device_register
;
2697 dbg("%s", "Entering...");
2698 printk(KERN_INFO KBUILD_MODNAME
": " DRIVER_VERSION
":"
2701 /* Register with the usb */
2702 retval
= usb_register(&io_driver
);
2704 dbg("%s", "Leaving...");
2707 usb_serial_deregister(&moschip7840_4port_device
);
2708 failed_port_device_register
:
2712 /****************************************************************************
2714 * Called when the driver is about to be unloaded.
2715 ****************************************************************************/
2716 static void __exit
moschip7840_exit(void)
2719 dbg("%s", " mos7840_exit :entering..........");
2721 usb_deregister(&io_driver
);
2723 usb_serial_deregister(&moschip7840_4port_device
);
2725 dbg("%s", "Entering...");
2728 module_init(moschip7840_init
);
2729 module_exit(moschip7840_exit
);
2731 /* Module information */
2732 MODULE_DESCRIPTION(DRIVER_DESC
);
2733 MODULE_LICENSE("GPL");
2735 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
2736 MODULE_PARM_DESC(debug
, "Debug enabled or not");