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 MOS_WDR_TIMEOUT 5000 /* default urb timeout */
87 #define MOS_PORT1 0x0200
88 #define MOS_PORT2 0x0300
89 #define MOS_VENREG 0x0000
90 #define MOS_MAX_PORT 0x02
91 #define MOS_WRITE 0x0E
95 #define MCS_RD_RTYPE 0xC0
96 #define MCS_WR_RTYPE 0x40
97 #define MCS_RDREQ 0x0D
98 #define MCS_WRREQ 0x0E
99 #define MCS_CTRL_TIMEOUT 500
100 #define VENDOR_READ_LENGTH (0x01)
102 #define MAX_NAME_LEN 64
104 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
105 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
107 /* For higher baud Rates use TIOCEXBAUD */
108 #define TIOCEXBAUD 0x5462
110 /* vendor id and device id defines */
112 /* The native mos7840/7820 component */
113 #define USB_VENDOR_ID_MOSCHIP 0x9710
114 #define MOSCHIP_DEVICE_ID_7840 0x7840
115 #define MOSCHIP_DEVICE_ID_7820 0x7820
116 #define MOSCHIP_DEVICE_ID_7810 0x7810
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 id_table.
121 #define USB_VENDOR_ID_BANDB 0x0856
122 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
123 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00
124 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
125 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01
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_2P 0xBC02
132 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
133 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
134 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
136 /* This driver also supports
137 * ATEN UC2324 device using Moschip MCS7840
138 * ATEN UC2322 device using Moschip MCS7820
140 #define USB_VENDOR_ID_ATENINTL 0x0557
141 #define ATENINTL_DEVICE_ID_UC2324 0x2011
142 #define ATENINTL_DEVICE_ID_UC2322 0x7820
144 /* Interrupt Routine Defines */
146 #define SERIAL_IIR_RLS 0x06
147 #define SERIAL_IIR_MS 0x00
150 * Emulation of the bit mask on the LINE STATUS REGISTER.
152 #define SERIAL_LSR_DR 0x0001
153 #define SERIAL_LSR_OE 0x0002
154 #define SERIAL_LSR_PE 0x0004
155 #define SERIAL_LSR_FE 0x0008
156 #define SERIAL_LSR_BI 0x0010
158 #define MOS_MSR_DELTA_CTS 0x10
159 #define MOS_MSR_DELTA_DSR 0x20
160 #define MOS_MSR_DELTA_RI 0x40
161 #define MOS_MSR_DELTA_CD 0x80
163 /* Serial Port register Address */
164 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
165 #define FIFO_CONTROL_REGISTER ((__u16)(0x02))
166 #define LINE_CONTROL_REGISTER ((__u16)(0x03))
167 #define MODEM_CONTROL_REGISTER ((__u16)(0x04))
168 #define LINE_STATUS_REGISTER ((__u16)(0x05))
169 #define MODEM_STATUS_REGISTER ((__u16)(0x06))
170 #define SCRATCH_PAD_REGISTER ((__u16)(0x07))
171 #define DIVISOR_LATCH_LSB ((__u16)(0x00))
172 #define DIVISOR_LATCH_MSB ((__u16)(0x01))
174 #define CLK_MULTI_REGISTER ((__u16)(0x02))
175 #define CLK_START_VALUE_REGISTER ((__u16)(0x03))
176 #define GPIO_REGISTER ((__u16)(0x07))
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 */
186 /* LED on/off milliseconds*/
187 #define LED_ON_MS 500
188 #define LED_OFF_MS 500
190 static int device_type
;
192 static const struct usb_device_id id_table
[] = {
193 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7840
)},
194 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7820
)},
195 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7810
)},
196 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_2
)},
197 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_2P
)},
198 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_4
)},
199 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_4P
)},
200 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_US9ML2_2
)},
201 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_US9ML2_4
)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USPTL4_2
)},
203 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USPTL4_4
)},
204 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_2
)},
205 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_2P
)},
206 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_4
)},
207 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_4P
)},
208 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL2_4
)},
209 {USB_DEVICE(USB_VENDOR_ID_ATENINTL
, ATENINTL_DEVICE_ID_UC2324
)},
210 {USB_DEVICE(USB_VENDOR_ID_ATENINTL
, ATENINTL_DEVICE_ID_UC2322
)},
211 {} /* terminating entry */
213 MODULE_DEVICE_TABLE(usb
, id_table
);
215 /* This structure holds all of the local port information */
217 struct moschip_port
{
218 int port_num
; /*Actual port number in the device(1,2,etc) */
219 struct urb
*write_urb
; /* write URB for this port */
220 struct urb
*read_urb
; /* read URB for this port */
222 __u8 shadowLCR
; /* last LCR value received */
223 __u8 shadowMCR
; /* last MCR value received */
227 wait_queue_head_t wait_chase
; /* for handling sleeping while waiting for chase to finish */
228 wait_queue_head_t delta_msr_wait
; /* for handling sleeping while waiting for msr change to happen */
230 struct async_icount icount
;
231 struct usb_serial_port
*port
; /* loop back to the owner of this object */
235 __u8 ControlRegOffset
;
237 /* for processing control URBS in interrupt context */
238 struct urb
*control_urb
;
239 struct usb_ctrlrequest
*dr
;
243 spinlock_t pool_lock
;
244 struct urb
*write_urb_pool
[NUM_URBS
];
248 /* For device(s) with LED indicator */
251 struct timer_list led_timer1
; /* Timer for LED on */
252 struct timer_list led_timer2
; /* Timer for LED off */
258 * mos7840_set_reg_sync
259 * To set the Control register by calling usb_fill_control_urb function
260 * by passing usb_sndctrlpipe function as parameter.
263 static int mos7840_set_reg_sync(struct usb_serial_port
*port
, __u16 reg
,
266 struct usb_device
*dev
= port
->serial
->dev
;
268 dbg("mos7840_set_reg_sync offset is %x, value %x", reg
, val
);
270 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), MCS_WRREQ
,
271 MCS_WR_RTYPE
, val
, reg
, NULL
, 0,
276 * mos7840_get_reg_sync
277 * To set the Uart register by calling usb_fill_control_urb function by
278 * passing usb_rcvctrlpipe function as parameter.
281 static int mos7840_get_reg_sync(struct usb_serial_port
*port
, __u16 reg
,
284 struct usb_device
*dev
= port
->serial
->dev
;
288 buf
= kmalloc(VENDOR_READ_LENGTH
, GFP_KERNEL
);
292 ret
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0), MCS_RDREQ
,
293 MCS_RD_RTYPE
, 0, reg
, buf
, VENDOR_READ_LENGTH
,
296 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg
, *val
);
303 * mos7840_set_uart_reg
304 * To set the Uart register by calling usb_fill_control_urb function by
305 * passing usb_sndctrlpipe function as parameter.
308 static int mos7840_set_uart_reg(struct usb_serial_port
*port
, __u16 reg
,
312 struct usb_device
*dev
= port
->serial
->dev
;
314 /* For the UART control registers, the application number need
316 if (port
->serial
->num_ports
== 4) {
317 val
|= (((__u16
) port
->number
-
318 (__u16
) (port
->serial
->minor
)) + 1) << 8;
319 dbg("mos7840_set_uart_reg application number is %x", val
);
321 if (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) == 0) {
322 val
|= (((__u16
) port
->number
-
323 (__u16
) (port
->serial
->minor
)) + 1) << 8;
324 dbg("mos7840_set_uart_reg application number is %x",
328 (((__u16
) port
->number
-
329 (__u16
) (port
->serial
->minor
)) + 2) << 8;
330 dbg("mos7840_set_uart_reg application number is %x",
334 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), MCS_WRREQ
,
335 MCS_WR_RTYPE
, val
, reg
, NULL
, 0,
341 * mos7840_get_uart_reg
342 * To set the Control register by calling usb_fill_control_urb function
343 * by passing usb_rcvctrlpipe function as parameter.
345 static int mos7840_get_uart_reg(struct usb_serial_port
*port
, __u16 reg
,
348 struct usb_device
*dev
= port
->serial
->dev
;
353 buf
= kmalloc(VENDOR_READ_LENGTH
, GFP_KERNEL
);
357 /* dbg("application number is %4x",
358 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
359 /* Wval is same as application number */
360 if (port
->serial
->num_ports
== 4) {
362 (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) +
364 dbg("mos7840_get_uart_reg application number is %x", Wval
);
366 if (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) == 0) {
367 Wval
= (((__u16
) port
->number
-
368 (__u16
) (port
->serial
->minor
)) + 1) << 8;
369 dbg("mos7840_get_uart_reg application number is %x",
372 Wval
= (((__u16
) port
->number
-
373 (__u16
) (port
->serial
->minor
)) + 2) << 8;
374 dbg("mos7840_get_uart_reg application number is %x",
378 ret
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0), MCS_RDREQ
,
379 MCS_RD_RTYPE
, Wval
, reg
, buf
, VENDOR_READ_LENGTH
,
387 static void mos7840_dump_serial_port(struct moschip_port
*mos7840_port
)
390 dbg("***************************************");
391 dbg("SpRegOffset is %2x", mos7840_port
->SpRegOffset
);
392 dbg("ControlRegOffset is %2x", mos7840_port
->ControlRegOffset
);
393 dbg("DCRRegOffset is %2x", mos7840_port
->DcrRegOffset
);
394 dbg("***************************************");
398 /************************************************************************/
399 /************************************************************************/
400 /* I N T E R F A C E F U N C T I O N S */
401 /* I N T E R F A C E F U N C T I O N S */
402 /************************************************************************/
403 /************************************************************************/
405 static inline void mos7840_set_port_private(struct usb_serial_port
*port
,
406 struct moschip_port
*data
)
408 usb_set_serial_port_data(port
, (void *)data
);
411 static inline struct moschip_port
*mos7840_get_port_private(struct
415 return (struct moschip_port
*)usb_get_serial_port_data(port
);
418 static void mos7840_handle_new_msr(struct moschip_port
*port
, __u8 new_msr
)
420 struct moschip_port
*mos7840_port
;
421 struct async_icount
*icount
;
423 icount
= &mos7840_port
->icount
;
425 (MOS_MSR_DELTA_CTS
| MOS_MSR_DELTA_DSR
| MOS_MSR_DELTA_RI
|
427 icount
= &mos7840_port
->icount
;
429 /* update input line counters */
430 if (new_msr
& MOS_MSR_DELTA_CTS
) {
434 if (new_msr
& MOS_MSR_DELTA_DSR
) {
438 if (new_msr
& MOS_MSR_DELTA_CD
) {
442 if (new_msr
& MOS_MSR_DELTA_RI
) {
449 static void mos7840_handle_new_lsr(struct moschip_port
*port
, __u8 new_lsr
)
451 struct async_icount
*icount
;
453 dbg("%s - %02x", __func__
, new_lsr
);
455 if (new_lsr
& SERIAL_LSR_BI
) {
457 * Parity and Framing errors only count if they
458 * occur exclusive of a break being
461 new_lsr
&= (__u8
) (SERIAL_LSR_OE
| SERIAL_LSR_BI
);
464 /* update input line counters */
465 icount
= &port
->icount
;
466 if (new_lsr
& SERIAL_LSR_BI
) {
470 if (new_lsr
& SERIAL_LSR_OE
) {
474 if (new_lsr
& SERIAL_LSR_PE
) {
478 if (new_lsr
& SERIAL_LSR_FE
) {
484 /************************************************************************/
485 /************************************************************************/
486 /* U S B C A L L B A C K F U N C T I O N S */
487 /* U S B C A L L B A C K F U N C T I O N S */
488 /************************************************************************/
489 /************************************************************************/
491 static void mos7840_control_callback(struct urb
*urb
)
494 struct moschip_port
*mos7840_port
;
497 int status
= urb
->status
;
499 mos7840_port
= urb
->context
;
508 /* this urb is terminated, clean up */
509 dbg("%s - urb shutting down with status: %d", __func__
,
513 dbg("%s - nonzero urb status received: %d", __func__
,
518 dbg("%s urb buffer size is %d", __func__
, urb
->actual_length
);
519 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__
,
520 mos7840_port
->MsrLsr
, mos7840_port
->port_num
);
521 data
= urb
->transfer_buffer
;
522 regval
= (__u8
) data
[0];
523 dbg("%s data is %x", __func__
, regval
);
524 if (mos7840_port
->MsrLsr
== 0)
525 mos7840_handle_new_msr(mos7840_port
, regval
);
526 else if (mos7840_port
->MsrLsr
== 1)
527 mos7840_handle_new_lsr(mos7840_port
, regval
);
530 spin_lock(&mos7840_port
->pool_lock
);
531 if (!mos7840_port
->zombie
)
532 result
= usb_submit_urb(mos7840_port
->int_urb
, GFP_ATOMIC
);
533 spin_unlock(&mos7840_port
->pool_lock
);
535 dev_err(&urb
->dev
->dev
,
536 "%s - Error %d submitting interrupt urb\n",
541 static int mos7840_get_reg(struct moschip_port
*mcs
, __u16 Wval
, __u16 reg
,
544 struct usb_device
*dev
= mcs
->port
->serial
->dev
;
545 struct usb_ctrlrequest
*dr
= mcs
->dr
;
546 unsigned char *buffer
= mcs
->ctrl_buf
;
549 dr
->bRequestType
= MCS_RD_RTYPE
;
550 dr
->bRequest
= MCS_RDREQ
;
551 dr
->wValue
= cpu_to_le16(Wval
); /* 0 */
552 dr
->wIndex
= cpu_to_le16(reg
);
553 dr
->wLength
= cpu_to_le16(2);
555 usb_fill_control_urb(mcs
->control_urb
, dev
, usb_rcvctrlpipe(dev
, 0),
556 (unsigned char *)dr
, buffer
, 2,
557 mos7840_control_callback
, mcs
);
558 mcs
->control_urb
->transfer_buffer_length
= 2;
559 ret
= usb_submit_urb(mcs
->control_urb
, GFP_ATOMIC
);
563 static void mos7840_set_led_callback(struct urb
*urb
)
565 switch (urb
->status
) {
572 /* This urb is terminated, clean up */
573 dbg("%s - urb shutting down with status: %d", __func__
,
577 dbg("%s - nonzero urb status received: %d", __func__
,
582 static void mos7840_set_led_async(struct moschip_port
*mcs
, __u16 wval
,
585 struct usb_device
*dev
= mcs
->port
->serial
->dev
;
586 struct usb_ctrlrequest
*dr
= mcs
->dr
;
588 dr
->bRequestType
= MCS_WR_RTYPE
;
589 dr
->bRequest
= MCS_WRREQ
;
590 dr
->wValue
= cpu_to_le16(wval
);
591 dr
->wIndex
= cpu_to_le16(reg
);
592 dr
->wLength
= cpu_to_le16(0);
594 usb_fill_control_urb(mcs
->control_urb
, dev
, usb_sndctrlpipe(dev
, 0),
595 (unsigned char *)dr
, NULL
, 0, mos7840_set_led_callback
, NULL
);
597 usb_submit_urb(mcs
->control_urb
, GFP_ATOMIC
);
600 static void mos7840_set_led_sync(struct usb_serial_port
*port
, __u16 reg
,
603 struct usb_device
*dev
= port
->serial
->dev
;
605 usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), MCS_WRREQ
, MCS_WR_RTYPE
,
606 val
, reg
, NULL
, 0, MOS_WDR_TIMEOUT
);
609 static void mos7840_led_off(unsigned long arg
)
611 struct moschip_port
*mcs
= (struct moschip_port
*) arg
;
614 mos7840_set_led_async(mcs
, 0x0300, MODEM_CONTROL_REGISTER
);
615 mod_timer(&mcs
->led_timer2
,
616 jiffies
+ msecs_to_jiffies(LED_OFF_MS
));
619 static void mos7840_led_flag_off(unsigned long arg
)
621 struct moschip_port
*mcs
= (struct moschip_port
*) arg
;
623 mcs
->led_flag
= false;
626 /*****************************************************************************
627 * mos7840_interrupt_callback
628 * this is the callback function for when we have received data on the
629 * interrupt endpoint.
630 *****************************************************************************/
632 static void mos7840_interrupt_callback(struct urb
*urb
)
636 struct moschip_port
*mos7840_port
;
637 struct usb_serial
*serial
;
642 __u16 wval
, wreg
= 0;
643 int status
= urb
->status
;
652 /* this urb is terminated, clean up */
653 dbg("%s - urb shutting down with status: %d", __func__
,
657 dbg("%s - nonzero urb status received: %d", __func__
,
662 length
= urb
->actual_length
;
663 data
= urb
->transfer_buffer
;
665 serial
= urb
->context
;
667 /* Moschip get 5 bytes
668 * Byte 1 IIR Port 1 (port.number is 0)
669 * Byte 2 IIR Port 2 (port.number is 1)
670 * Byte 3 IIR Port 3 (port.number is 2)
671 * Byte 4 IIR Port 4 (port.number is 3)
672 * Byte 5 FIFO status for both */
674 if (length
&& length
> 5) {
675 dbg("%s", "Wrong data !!!");
679 sp
[0] = (__u8
) data
[0];
680 sp
[1] = (__u8
) data
[1];
681 sp
[2] = (__u8
) data
[2];
682 sp
[3] = (__u8
) data
[3];
685 for (i
= 0; i
< serial
->num_ports
; i
++) {
686 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
688 (((__u16
) serial
->port
[i
]->number
-
689 (__u16
) (serial
->minor
)) + 1) << 8;
690 if (mos7840_port
->open
) {
692 dbg("SP%d No Interrupt !!!", i
);
694 switch (sp
[i
] & 0x0f) {
696 dbg("Serial Port %d: Receiver status error or ", i
);
697 dbg("address bit detected in 9-bit mode");
698 mos7840_port
->MsrLsr
= 1;
699 wreg
= LINE_STATUS_REGISTER
;
702 dbg("Serial Port %d: Modem status change", i
);
703 mos7840_port
->MsrLsr
= 0;
704 wreg
= MODEM_STATUS_REGISTER
;
707 spin_lock(&mos7840_port
->pool_lock
);
708 if (!mos7840_port
->zombie
) {
709 rv
= mos7840_get_reg(mos7840_port
, wval
, wreg
, &Data
);
711 spin_unlock(&mos7840_port
->pool_lock
);
714 spin_unlock(&mos7840_port
->pool_lock
);
719 /* the completion handler for the control urb will resubmit */
722 result
= usb_submit_urb(urb
, GFP_ATOMIC
);
724 dev_err(&urb
->dev
->dev
,
725 "%s - Error %d submitting interrupt urb\n",
730 static int mos7840_port_paranoia_check(struct usb_serial_port
*port
,
731 const char *function
)
734 dbg("%s - port == NULL", function
);
738 dbg("%s - port->serial == NULL", function
);
745 /* Inline functions to check the sanity of a pointer that is passed to us */
746 static int mos7840_serial_paranoia_check(struct usb_serial
*serial
,
747 const char *function
)
750 dbg("%s - serial == NULL", function
);
754 dbg("%s - serial->type == NULL!", function
);
761 static struct usb_serial
*mos7840_get_usb_serial(struct usb_serial_port
*port
,
762 const char *function
)
764 /* if no port was specified, or it fails a paranoia check */
766 mos7840_port_paranoia_check(port
, function
) ||
767 mos7840_serial_paranoia_check(port
->serial
, function
)) {
768 /* then say that we don't have a valid usb_serial thing,
769 * which will end up genrating -ENODEV return values */
776 /*****************************************************************************
777 * mos7840_bulk_in_callback
778 * this is the callback function for when we have received data on the
780 *****************************************************************************/
782 static void mos7840_bulk_in_callback(struct urb
*urb
)
786 struct usb_serial
*serial
;
787 struct usb_serial_port
*port
;
788 struct moschip_port
*mos7840_port
;
789 struct tty_struct
*tty
;
790 int status
= urb
->status
;
792 mos7840_port
= urb
->context
;
794 dbg("%s", "NULL mos7840_port pointer");
799 dbg("nonzero read bulk status received: %d", status
);
800 mos7840_port
->read_urb_busy
= false;
804 port
= (struct usb_serial_port
*)mos7840_port
->port
;
805 if (mos7840_port_paranoia_check(port
, __func__
)) {
806 dbg("%s", "Port Paranoia failed");
807 mos7840_port
->read_urb_busy
= false;
811 serial
= mos7840_get_usb_serial(port
, __func__
);
813 dbg("%s", "Bad serial pointer");
814 mos7840_port
->read_urb_busy
= false;
818 data
= urb
->transfer_buffer
;
820 if (urb
->actual_length
) {
821 tty
= tty_port_tty_get(&mos7840_port
->port
->port
);
823 tty_insert_flip_string(tty
, data
, urb
->actual_length
);
825 tty_flip_buffer_push(tty
);
828 mos7840_port
->icount
.rx
+= urb
->actual_length
;
830 dbg("mos7840_port->icount.rx is %d:",
831 mos7840_port
->icount
.rx
);
834 if (!mos7840_port
->read_urb
) {
835 dbg("%s", "URB KILLED !!!");
836 mos7840_port
->read_urb_busy
= false;
841 if (mos7840_port
->has_led
&& !mos7840_port
->led_flag
) {
842 mos7840_port
->led_flag
= true;
843 mos7840_set_led_async(mos7840_port
, 0x0301,
844 MODEM_CONTROL_REGISTER
);
845 mod_timer(&mos7840_port
->led_timer1
,
846 jiffies
+ msecs_to_jiffies(LED_ON_MS
));
849 mos7840_port
->read_urb_busy
= true;
850 retval
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
853 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval
);
854 mos7840_port
->read_urb_busy
= false;
858 /*****************************************************************************
859 * mos7840_bulk_out_data_callback
860 * this is the callback function for when we have finished sending
861 * serial data on the bulk out endpoint.
862 *****************************************************************************/
864 static void mos7840_bulk_out_data_callback(struct urb
*urb
)
866 struct moschip_port
*mos7840_port
;
867 struct tty_struct
*tty
;
868 int status
= urb
->status
;
871 mos7840_port
= urb
->context
;
872 spin_lock(&mos7840_port
->pool_lock
);
873 for (i
= 0; i
< NUM_URBS
; i
++) {
874 if (urb
== mos7840_port
->write_urb_pool
[i
]) {
875 mos7840_port
->busy
[i
] = 0;
879 spin_unlock(&mos7840_port
->pool_lock
);
882 dbg("nonzero write bulk status received:%d", status
);
886 if (mos7840_port_paranoia_check(mos7840_port
->port
, __func__
)) {
887 dbg("%s", "Port Paranoia failed");
891 tty
= tty_port_tty_get(&mos7840_port
->port
->port
);
892 if (tty
&& mos7840_port
->open
)
898 /************************************************************************/
899 /* 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 */
900 /************************************************************************/
901 #ifdef MCSSerialProbe
902 static int mos7840_serial_probe(struct usb_serial
*serial
,
903 const struct usb_device_id
*id
)
906 /*need to implement the mode_reg reading and updating\
907 structures usb_serial_ device_type\
908 (i.e num_ports, num_bulkin,bulkout etc) */
909 /* Also we can update the changes attach */
914 /*****************************************************************************
916 * this function is called by the tty driver when a port is opened
917 * If successful, we return 0
918 * Otherwise we return a negative error number.
919 *****************************************************************************/
921 static int mos7840_open(struct tty_struct
*tty
, struct usb_serial_port
*port
)
925 struct usb_serial
*serial
;
929 struct moschip_port
*mos7840_port
;
930 struct moschip_port
*port0
;
932 if (mos7840_port_paranoia_check(port
, __func__
)) {
933 dbg("%s", "Port Paranoia failed");
937 serial
= port
->serial
;
939 if (mos7840_serial_paranoia_check(serial
, __func__
)) {
940 dbg("%s", "Serial Paranoia failed");
944 mos7840_port
= mos7840_get_port_private(port
);
945 port0
= mos7840_get_port_private(serial
->port
[0]);
947 if (mos7840_port
== NULL
|| port0
== NULL
)
950 usb_clear_halt(serial
->dev
, port
->write_urb
->pipe
);
951 usb_clear_halt(serial
->dev
, port
->read_urb
->pipe
);
954 /* Initialising the write urb pool */
955 for (j
= 0; j
< NUM_URBS
; ++j
) {
956 urb
= usb_alloc_urb(0, GFP_KERNEL
);
957 mos7840_port
->write_urb_pool
[j
] = urb
;
960 dev_err(&port
->dev
, "No more urbs???\n");
964 urb
->transfer_buffer
= kmalloc(URB_TRANSFER_BUFFER_SIZE
,
966 if (!urb
->transfer_buffer
) {
968 mos7840_port
->write_urb_pool
[j
] = NULL
;
970 "%s-out of memory for urb buffers.\n",
976 /*****************************************************************************
977 * Initialize MCS7840 -- Write Init values to corresponding Registers
985 * 0x08 : SP1/2 Control Reg
986 *****************************************************************************/
988 /* NEED to check the following Block */
991 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
, &Data
);
993 dbg("Reading Spreg failed");
997 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
999 dbg("writing Spreg failed");
1004 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
1006 dbg("writing Spreg failed");
1009 /* End of block to be checked */
1012 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1015 dbg("Reading Controlreg failed");
1018 Data
|= 0x08; /* Driver done bit */
1019 Data
|= 0x20; /* rx_disable */
1020 status
= mos7840_set_reg_sync(port
,
1021 mos7840_port
->ControlRegOffset
, Data
);
1023 dbg("writing Controlreg failed");
1026 /* do register settings here */
1027 /* Set all regs to the device default values. */
1028 /***********************************
1029 * First Disable all interrupts.
1030 ***********************************/
1032 status
= mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
1034 dbg("disabling interrupts failed");
1037 /* Set FIFO_CONTROL_REGISTER to the default value */
1039 status
= mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
1041 dbg("Writing FIFO_CONTROL_REGISTER failed");
1046 status
= mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
1048 dbg("Writing FIFO_CONTROL_REGISTER failed");
1053 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1054 mos7840_port
->shadowLCR
= Data
;
1057 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
1058 mos7840_port
->shadowMCR
= Data
;
1061 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
1062 mos7840_port
->shadowLCR
= Data
;
1064 Data
|= SERIAL_LCR_DLAB
; /* data latch enable in LCR 0x80 */
1065 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1068 status
= mos7840_set_uart_reg(port
, DIVISOR_LATCH_LSB
, Data
);
1071 status
= mos7840_set_uart_reg(port
, DIVISOR_LATCH_MSB
, Data
);
1074 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
1076 Data
= Data
& ~SERIAL_LCR_DLAB
;
1077 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1078 mos7840_port
->shadowLCR
= Data
;
1080 /* clearing Bulkin and Bulkout Fifo */
1082 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
, &Data
);
1085 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
1087 Data
= Data
& ~0x0c;
1088 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
1089 /* Finally enable all interrupts */
1091 status
= mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
1093 /* clearing rx_disable */
1095 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1097 Data
= Data
& ~0x20;
1098 status
= mos7840_set_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1103 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1106 status
= mos7840_set_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1109 /* Check to see if we've set up our endpoint info yet *
1110 * (can't set it up in mos7840_startup as the structures *
1111 * were not set up at that time.) */
1112 if (port0
->open_ports
== 1) {
1113 if (serial
->port
[0]->interrupt_in_buffer
== NULL
) {
1114 /* set up interrupt urb */
1115 usb_fill_int_urb(serial
->port
[0]->interrupt_in_urb
,
1117 usb_rcvintpipe(serial
->dev
,
1118 serial
->port
[0]->interrupt_in_endpointAddress
),
1119 serial
->port
[0]->interrupt_in_buffer
,
1120 serial
->port
[0]->interrupt_in_urb
->
1121 transfer_buffer_length
,
1122 mos7840_interrupt_callback
,
1124 serial
->port
[0]->interrupt_in_urb
->interval
);
1126 /* start interrupt read for mos7840 *
1127 * will continue as long as mos7840 is connected */
1130 usb_submit_urb(serial
->port
[0]->interrupt_in_urb
,
1133 dev_err(&port
->dev
, "%s - Error %d submitting "
1134 "interrupt urb\n", __func__
, response
);
1141 /* see if we've set up our endpoint info yet *
1142 * (can't set it up in mos7840_startup as the *
1143 * structures were not set up at that time.) */
1145 dbg("port number is %d", port
->number
);
1146 dbg("serial number is %d", port
->serial
->minor
);
1147 dbg("Bulkin endpoint is %d", port
->bulk_in_endpointAddress
);
1148 dbg("BulkOut endpoint is %d", port
->bulk_out_endpointAddress
);
1149 dbg("Interrupt endpoint is %d", port
->interrupt_in_endpointAddress
);
1150 dbg("port's number in the device is %d", mos7840_port
->port_num
);
1151 mos7840_port
->read_urb
= port
->read_urb
;
1153 /* set up our bulk in urb */
1154 if ((serial
->num_ports
== 2)
1155 && ((((__u16
)port
->number
-
1156 (__u16
)(port
->serial
->minor
)) % 2) != 0)) {
1157 usb_fill_bulk_urb(mos7840_port
->read_urb
,
1159 usb_rcvbulkpipe(serial
->dev
,
1160 (port
->bulk_in_endpointAddress
) + 2),
1161 port
->bulk_in_buffer
,
1162 mos7840_port
->read_urb
->transfer_buffer_length
,
1163 mos7840_bulk_in_callback
, mos7840_port
);
1165 usb_fill_bulk_urb(mos7840_port
->read_urb
,
1167 usb_rcvbulkpipe(serial
->dev
,
1168 port
->bulk_in_endpointAddress
),
1169 port
->bulk_in_buffer
,
1170 mos7840_port
->read_urb
->transfer_buffer_length
,
1171 mos7840_bulk_in_callback
, mos7840_port
);
1174 dbg("mos7840_open: bulkin endpoint is %d",
1175 port
->bulk_in_endpointAddress
);
1176 mos7840_port
->read_urb_busy
= true;
1177 response
= usb_submit_urb(mos7840_port
->read_urb
, GFP_KERNEL
);
1179 dev_err(&port
->dev
, "%s - Error %d submitting control urb\n",
1180 __func__
, response
);
1181 mos7840_port
->read_urb_busy
= false;
1184 /* initialize our wait queues */
1185 init_waitqueue_head(&mos7840_port
->wait_chase
);
1186 init_waitqueue_head(&mos7840_port
->delta_msr_wait
);
1188 /* initialize our icount structure */
1189 memset(&(mos7840_port
->icount
), 0x00, sizeof(mos7840_port
->icount
));
1191 /* initialize our port settings */
1192 /* Must set to enable ints! */
1193 mos7840_port
->shadowMCR
= MCR_MASTER_IE
;
1194 /* send a open port command */
1195 mos7840_port
->open
= 1;
1196 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1197 mos7840_port
->icount
.tx
= 0;
1198 mos7840_port
->icount
.rx
= 0;
1200 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p",
1201 serial
, mos7840_port
, port
);
1206 /*****************************************************************************
1207 * mos7840_chars_in_buffer
1208 * this function is called by the tty driver when it wants to know how many
1209 * bytes of data we currently have outstanding in the port (data that has
1210 * been written, but hasn't made it out the port yet)
1211 * If successful, we return the number of bytes left to be written in the
1213 * Otherwise we return zero.
1214 *****************************************************************************/
1216 static int mos7840_chars_in_buffer(struct tty_struct
*tty
)
1218 struct usb_serial_port
*port
= tty
->driver_data
;
1221 unsigned long flags
;
1222 struct moschip_port
*mos7840_port
;
1224 if (mos7840_port_paranoia_check(port
, __func__
)) {
1225 dbg("%s", "Invalid port");
1229 mos7840_port
= mos7840_get_port_private(port
);
1230 if (mos7840_port
== NULL
)
1233 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1234 for (i
= 0; i
< NUM_URBS
; ++i
) {
1235 if (mos7840_port
->busy
[i
]) {
1236 struct urb
*urb
= mos7840_port
->write_urb_pool
[i
];
1237 chars
+= urb
->transfer_buffer_length
;
1240 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1241 dbg("%s - returns %d", __func__
, chars
);
1246 /*****************************************************************************
1248 * this function is called by the tty driver when a port is closed
1249 *****************************************************************************/
1251 static void mos7840_close(struct usb_serial_port
*port
)
1253 struct usb_serial
*serial
;
1254 struct moschip_port
*mos7840_port
;
1255 struct moschip_port
*port0
;
1259 if (mos7840_port_paranoia_check(port
, __func__
)) {
1260 dbg("%s", "Port Paranoia failed");
1264 serial
= mos7840_get_usb_serial(port
, __func__
);
1266 dbg("%s", "Serial Paranoia failed");
1270 mos7840_port
= mos7840_get_port_private(port
);
1271 port0
= mos7840_get_port_private(serial
->port
[0]);
1273 if (mos7840_port
== NULL
|| port0
== NULL
)
1276 for (j
= 0; j
< NUM_URBS
; ++j
)
1277 usb_kill_urb(mos7840_port
->write_urb_pool
[j
]);
1279 /* Freeing Write URBs */
1280 for (j
= 0; j
< NUM_URBS
; ++j
) {
1281 if (mos7840_port
->write_urb_pool
[j
]) {
1282 if (mos7840_port
->write_urb_pool
[j
]->transfer_buffer
)
1283 kfree(mos7840_port
->write_urb_pool
[j
]->
1286 usb_free_urb(mos7840_port
->write_urb_pool
[j
]);
1290 /* While closing port, shutdown all bulk read, write *
1291 * and interrupt read if they exists */
1293 if (mos7840_port
->write_urb
) {
1294 dbg("%s", "Shutdown bulk write");
1295 usb_kill_urb(mos7840_port
->write_urb
);
1297 if (mos7840_port
->read_urb
) {
1298 dbg("%s", "Shutdown bulk read");
1299 usb_kill_urb(mos7840_port
->read_urb
);
1300 mos7840_port
->read_urb_busy
= false;
1302 if ((&mos7840_port
->control_urb
)) {
1303 dbg("%s", "Shutdown control read");
1304 /*/ usb_kill_urb (mos7840_port->control_urb); */
1307 /* if(mos7840_port->ctrl_buf != NULL) */
1308 /* kfree(mos7840_port->ctrl_buf); */
1309 port0
->open_ports
--;
1310 dbg("mos7840_num_open_ports in close%d:in port%d",
1311 port0
->open_ports
, port
->number
);
1312 if (port0
->open_ports
== 0) {
1313 if (serial
->port
[0]->interrupt_in_urb
) {
1314 dbg("%s", "Shutdown interrupt_in_urb");
1315 usb_kill_urb(serial
->port
[0]->interrupt_in_urb
);
1319 if (mos7840_port
->write_urb
) {
1320 /* if this urb had a transfer buffer already (old tx) free it */
1321 if (mos7840_port
->write_urb
->transfer_buffer
!= NULL
)
1322 kfree(mos7840_port
->write_urb
->transfer_buffer
);
1323 usb_free_urb(mos7840_port
->write_urb
);
1327 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
1330 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
1332 mos7840_port
->open
= 0;
1335 /************************************************************************
1337 * mos7840_block_until_chase_response
1339 * This function will block the close until one of the following:
1340 * 1. Response to our Chase comes from mos7840
1341 * 2. A timeout of 10 seconds without activity has expired
1342 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1344 ************************************************************************/
1346 static void mos7840_block_until_chase_response(struct tty_struct
*tty
,
1347 struct moschip_port
*mos7840_port
)
1349 int timeout
= msecs_to_jiffies(1000);
1354 count
= mos7840_chars_in_buffer(tty
);
1356 /* Check for Buffer status */
1360 /* Block the thread for a while */
1361 interruptible_sleep_on_timeout(&mos7840_port
->wait_chase
,
1363 /* No activity.. count down section */
1366 dbg("%s - TIMEOUT", __func__
);
1369 /* Reset timeout value back to seconds */
1376 /*****************************************************************************
1378 * this function sends a break to the port
1379 *****************************************************************************/
1380 static void mos7840_break(struct tty_struct
*tty
, int break_state
)
1382 struct usb_serial_port
*port
= tty
->driver_data
;
1384 struct usb_serial
*serial
;
1385 struct moschip_port
*mos7840_port
;
1387 if (mos7840_port_paranoia_check(port
, __func__
)) {
1388 dbg("%s", "Port Paranoia failed");
1392 serial
= mos7840_get_usb_serial(port
, __func__
);
1394 dbg("%s", "Serial Paranoia failed");
1398 mos7840_port
= mos7840_get_port_private(port
);
1400 if (mos7840_port
== NULL
)
1404 /* flush and block until tx is empty */
1405 mos7840_block_until_chase_response(tty
, mos7840_port
);
1407 if (break_state
== -1)
1408 data
= mos7840_port
->shadowLCR
| LCR_SET_BREAK
;
1410 data
= mos7840_port
->shadowLCR
& ~LCR_SET_BREAK
;
1412 /* FIXME: no locking on shadowLCR anywhere in driver */
1413 mos7840_port
->shadowLCR
= data
;
1414 dbg("mcs7840_break mos7840_port->shadowLCR is %x",
1415 mos7840_port
->shadowLCR
);
1416 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
,
1417 mos7840_port
->shadowLCR
);
1420 /*****************************************************************************
1421 * mos7840_write_room
1422 * this function is called by the tty driver when it wants to know how many
1423 * bytes of data we can accept for a specific port.
1424 * If successful, we return the amount of room that we have for this port
1425 * Otherwise we return a negative error number.
1426 *****************************************************************************/
1428 static int mos7840_write_room(struct tty_struct
*tty
)
1430 struct usb_serial_port
*port
= tty
->driver_data
;
1433 unsigned long flags
;
1434 struct moschip_port
*mos7840_port
;
1436 if (mos7840_port_paranoia_check(port
, __func__
)) {
1437 dbg("%s", "Invalid port");
1438 dbg("%s", " mos7840_write_room:leaving ...........");
1442 mos7840_port
= mos7840_get_port_private(port
);
1443 if (mos7840_port
== NULL
) {
1444 dbg("%s", "mos7840_break:leaving ...........");
1448 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1449 for (i
= 0; i
< NUM_URBS
; ++i
) {
1450 if (!mos7840_port
->busy
[i
])
1451 room
+= URB_TRANSFER_BUFFER_SIZE
;
1453 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1455 room
= (room
== 0) ? 0 : room
- URB_TRANSFER_BUFFER_SIZE
+ 1;
1456 dbg("%s - returns %d", __func__
, room
);
1461 /*****************************************************************************
1463 * this function is called by the tty driver when data should be written to
1465 * If successful, we return the number of bytes written, otherwise we
1466 * return a negative error number.
1467 *****************************************************************************/
1469 static int mos7840_write(struct tty_struct
*tty
, struct usb_serial_port
*port
,
1470 const unsigned char *data
, int count
)
1476 unsigned long flags
;
1478 struct moschip_port
*mos7840_port
;
1479 struct usb_serial
*serial
;
1482 const unsigned char *current_position
= data
;
1483 unsigned char *data1
;
1487 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
1488 mos7840_port
->shadowLCR
= Data
;
1489 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data
);
1490 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1491 mos7840_port
->shadowLCR
);
1494 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1495 /* mos7840_port->shadowLCR=Data;//Need to add later */
1497 Data
|= SERIAL_LCR_DLAB
; /* data latch enable in LCR 0x80 */
1498 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1501 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1503 status
= mos7840_get_uart_reg(port
, DIVISOR_LATCH_LSB
, &Data
);
1504 dbg("mos7840_write:DLL value is %x", Data
);
1507 status
= mos7840_get_uart_reg(port
, DIVISOR_LATCH_MSB
, &Data
);
1508 dbg("mos7840_write:DLM value is %x", Data
);
1510 Data
= Data
& ~SERIAL_LCR_DLAB
;
1511 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1512 mos7840_port
->shadowLCR
);
1513 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1516 if (mos7840_port_paranoia_check(port
, __func__
)) {
1517 dbg("%s", "Port Paranoia failed");
1521 serial
= port
->serial
;
1522 if (mos7840_serial_paranoia_check(serial
, __func__
)) {
1523 dbg("%s", "Serial Paranoia failed");
1527 mos7840_port
= mos7840_get_port_private(port
);
1528 if (mos7840_port
== NULL
) {
1529 dbg("%s", "mos7840_port is NULL");
1533 /* try to find a free urb in the list */
1536 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1537 for (i
= 0; i
< NUM_URBS
; ++i
) {
1538 if (!mos7840_port
->busy
[i
]) {
1539 mos7840_port
->busy
[i
] = 1;
1540 urb
= mos7840_port
->write_urb_pool
[i
];
1545 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1548 dbg("%s - no more free urbs", __func__
);
1552 if (urb
->transfer_buffer
== NULL
) {
1553 urb
->transfer_buffer
=
1554 kmalloc(URB_TRANSFER_BUFFER_SIZE
, GFP_KERNEL
);
1556 if (urb
->transfer_buffer
== NULL
) {
1557 dev_err_console(port
, "%s no more kernel memory...\n",
1562 transfer_size
= min(count
, URB_TRANSFER_BUFFER_SIZE
);
1564 memcpy(urb
->transfer_buffer
, current_position
, transfer_size
);
1566 /* fill urb with data and submit */
1567 if ((serial
->num_ports
== 2)
1568 && ((((__u16
)port
->number
-
1569 (__u16
)(port
->serial
->minor
)) % 2) != 0)) {
1570 usb_fill_bulk_urb(urb
,
1572 usb_sndbulkpipe(serial
->dev
,
1573 (port
->bulk_out_endpointAddress
) + 2),
1574 urb
->transfer_buffer
,
1576 mos7840_bulk_out_data_callback
, mos7840_port
);
1578 usb_fill_bulk_urb(urb
,
1580 usb_sndbulkpipe(serial
->dev
,
1581 port
->bulk_out_endpointAddress
),
1582 urb
->transfer_buffer
,
1584 mos7840_bulk_out_data_callback
, mos7840_port
);
1587 data1
= urb
->transfer_buffer
;
1588 dbg("bulkout endpoint is %d", port
->bulk_out_endpointAddress
);
1591 if (mos7840_port
->has_led
&& !mos7840_port
->led_flag
) {
1592 mos7840_port
->led_flag
= true;
1593 mos7840_set_led_sync(port
, MODEM_CONTROL_REGISTER
, 0x0301);
1594 mod_timer(&mos7840_port
->led_timer1
,
1595 jiffies
+ msecs_to_jiffies(LED_ON_MS
));
1598 /* send it down the pipe */
1599 status
= usb_submit_urb(urb
, GFP_ATOMIC
);
1602 mos7840_port
->busy
[i
] = 0;
1603 dev_err_console(port
, "%s - usb_submit_urb(write bulk) failed "
1604 "with status = %d\n", __func__
, status
);
1605 bytes_sent
= status
;
1608 bytes_sent
= transfer_size
;
1609 mos7840_port
->icount
.tx
+= transfer_size
;
1611 dbg("mos7840_port->icount.tx is %d:", mos7840_port
->icount
.tx
);
1617 /*****************************************************************************
1619 * this function is called by the tty driver when it wants to stop the data
1620 * being read from the port.
1621 *****************************************************************************/
1623 static void mos7840_throttle(struct tty_struct
*tty
)
1625 struct usb_serial_port
*port
= tty
->driver_data
;
1626 struct moschip_port
*mos7840_port
;
1629 if (mos7840_port_paranoia_check(port
, __func__
)) {
1630 dbg("%s", "Invalid port");
1634 dbg("- port %d", port
->number
);
1636 mos7840_port
= mos7840_get_port_private(port
);
1638 if (mos7840_port
== NULL
)
1641 if (!mos7840_port
->open
) {
1642 dbg("%s", "port not opened");
1646 /* if we are implementing XON/XOFF, send the stop character */
1648 unsigned char stop_char
= STOP_CHAR(tty
);
1649 status
= mos7840_write(tty
, port
, &stop_char
, 1);
1653 /* if we are implementing RTS/CTS, toggle that line */
1654 if (tty
->termios
.c_cflag
& CRTSCTS
) {
1655 mos7840_port
->shadowMCR
&= ~MCR_RTS
;
1656 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1657 mos7840_port
->shadowMCR
);
1663 /*****************************************************************************
1664 * mos7840_unthrottle
1665 * this function is called by the tty driver when it wants to resume
1666 * the data being read from the port (called after mos7840_throttle is
1668 *****************************************************************************/
1669 static void mos7840_unthrottle(struct tty_struct
*tty
)
1671 struct usb_serial_port
*port
= tty
->driver_data
;
1673 struct moschip_port
*mos7840_port
= mos7840_get_port_private(port
);
1675 if (mos7840_port_paranoia_check(port
, __func__
)) {
1676 dbg("%s", "Invalid port");
1680 if (mos7840_port
== NULL
)
1683 if (!mos7840_port
->open
) {
1684 dbg("%s - port not opened", __func__
);
1688 /* if we are implementing XON/XOFF, send the start character */
1690 unsigned char start_char
= START_CHAR(tty
);
1691 status
= mos7840_write(tty
, port
, &start_char
, 1);
1696 /* if we are implementing RTS/CTS, toggle that line */
1697 if (tty
->termios
.c_cflag
& CRTSCTS
) {
1698 mos7840_port
->shadowMCR
|= MCR_RTS
;
1699 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1700 mos7840_port
->shadowMCR
);
1706 static int mos7840_tiocmget(struct tty_struct
*tty
)
1708 struct usb_serial_port
*port
= tty
->driver_data
;
1709 struct moschip_port
*mos7840_port
;
1710 unsigned int result
;
1714 mos7840_port
= mos7840_get_port_private(port
);
1716 if (mos7840_port
== NULL
)
1719 status
= mos7840_get_uart_reg(port
, MODEM_STATUS_REGISTER
, &msr
);
1720 status
= mos7840_get_uart_reg(port
, MODEM_CONTROL_REGISTER
, &mcr
);
1721 result
= ((mcr
& MCR_DTR
) ? TIOCM_DTR
: 0)
1722 | ((mcr
& MCR_RTS
) ? TIOCM_RTS
: 0)
1723 | ((mcr
& MCR_LOOPBACK
) ? TIOCM_LOOP
: 0)
1724 | ((msr
& MOS7840_MSR_CTS
) ? TIOCM_CTS
: 0)
1725 | ((msr
& MOS7840_MSR_CD
) ? TIOCM_CAR
: 0)
1726 | ((msr
& MOS7840_MSR_RI
) ? TIOCM_RI
: 0)
1727 | ((msr
& MOS7840_MSR_DSR
) ? TIOCM_DSR
: 0);
1729 dbg("%s - 0x%04X", __func__
, result
);
1734 static int mos7840_tiocmset(struct tty_struct
*tty
,
1735 unsigned int set
, unsigned int clear
)
1737 struct usb_serial_port
*port
= tty
->driver_data
;
1738 struct moschip_port
*mos7840_port
;
1742 mos7840_port
= mos7840_get_port_private(port
);
1744 if (mos7840_port
== NULL
)
1747 /* FIXME: What locks the port registers ? */
1748 mcr
= mos7840_port
->shadowMCR
;
1749 if (clear
& TIOCM_RTS
)
1751 if (clear
& TIOCM_DTR
)
1753 if (clear
& TIOCM_LOOP
)
1754 mcr
&= ~MCR_LOOPBACK
;
1756 if (set
& TIOCM_RTS
)
1758 if (set
& TIOCM_DTR
)
1760 if (set
& TIOCM_LOOP
)
1761 mcr
|= MCR_LOOPBACK
;
1763 mos7840_port
->shadowMCR
= mcr
;
1765 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, mcr
);
1767 dbg("setting MODEM_CONTROL_REGISTER Failed");
1774 /*****************************************************************************
1775 * mos7840_calc_baud_rate_divisor
1776 * this function calculates the proper baud rate divisor for the specified
1778 *****************************************************************************/
1779 static int mos7840_calc_baud_rate_divisor(int baudRate
, int *divisor
,
1782 dbg("%s - %d", __func__
, baudRate
);
1784 if (baudRate
<= 115200) {
1785 *divisor
= 115200 / baudRate
;
1788 if ((baudRate
> 115200) && (baudRate
<= 230400)) {
1789 *divisor
= 230400 / baudRate
;
1790 *clk_sel_val
= 0x10;
1791 } else if ((baudRate
> 230400) && (baudRate
<= 403200)) {
1792 *divisor
= 403200 / baudRate
;
1793 *clk_sel_val
= 0x20;
1794 } else if ((baudRate
> 403200) && (baudRate
<= 460800)) {
1795 *divisor
= 460800 / baudRate
;
1796 *clk_sel_val
= 0x30;
1797 } else if ((baudRate
> 460800) && (baudRate
<= 806400)) {
1798 *divisor
= 806400 / baudRate
;
1799 *clk_sel_val
= 0x40;
1800 } else if ((baudRate
> 806400) && (baudRate
<= 921600)) {
1801 *divisor
= 921600 / baudRate
;
1802 *clk_sel_val
= 0x50;
1803 } else if ((baudRate
> 921600) && (baudRate
<= 1572864)) {
1804 *divisor
= 1572864 / baudRate
;
1805 *clk_sel_val
= 0x60;
1806 } else if ((baudRate
> 1572864) && (baudRate
<= 3145728)) {
1807 *divisor
= 3145728 / baudRate
;
1808 *clk_sel_val
= 0x70;
1814 for (i
= 0; i
< ARRAY_SIZE(mos7840_divisor_table
); i
++) {
1815 if (mos7840_divisor_table
[i
].BaudRate
== baudrate
) {
1816 *divisor
= mos7840_divisor_table
[i
].Divisor
;
1821 /* After trying for all the standard baud rates *
1822 * Try calculating the divisor for this baud rate */
1824 if (baudrate
> 75 && baudrate
< 230400) {
1825 /* get the divisor */
1826 custom
= (__u16
) (230400L / baudrate
);
1828 /* Check for round off */
1829 round1
= (__u16
) (2304000L / baudrate
);
1830 round
= (__u16
) (round1
- (custom
* 10));
1835 dbg(" Baud %d = %d", baudrate
, custom
);
1839 dbg("%s", " Baud calculation Failed...");
1844 /*****************************************************************************
1845 * mos7840_send_cmd_write_baud_rate
1846 * this function sends the proper command to change the baud rate of the
1848 *****************************************************************************/
1850 static int mos7840_send_cmd_write_baud_rate(struct moschip_port
*mos7840_port
,
1856 unsigned char number
;
1858 struct usb_serial_port
*port
;
1860 if (mos7840_port
== NULL
)
1863 port
= (struct usb_serial_port
*)mos7840_port
->port
;
1864 if (mos7840_port_paranoia_check(port
, __func__
)) {
1865 dbg("%s", "Invalid port");
1869 if (mos7840_serial_paranoia_check(port
->serial
, __func__
)) {
1870 dbg("%s", "Invalid Serial");
1874 number
= mos7840_port
->port
->number
- mos7840_port
->port
->serial
->minor
;
1876 dbg("%s - port = %d, baud = %d", __func__
,
1877 mos7840_port
->port
->number
, baudRate
);
1878 /* reset clk_uart_sel in spregOffset */
1879 if (baudRate
> 115200) {
1880 #ifdef HW_flow_control
1881 /* NOTE: need to see the pther register to modify */
1882 /* setting h/w flow control bit to 1 */
1884 mos7840_port
->shadowMCR
= Data
;
1885 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1888 dbg("Writing spreg failed in set_serial_baud");
1894 #ifdef HW_flow_control
1895 /* setting h/w flow control bit to 0 */
1897 mos7840_port
->shadowMCR
= Data
;
1898 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1901 dbg("Writing spreg failed in set_serial_baud");
1908 if (1) { /* baudRate <= 115200) */
1911 status
= mos7840_calc_baud_rate_divisor(baudRate
, &divisor
,
1913 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
,
1916 dbg("reading spreg failed in set_serial_baud");
1919 Data
= (Data
& 0x8f) | clk_sel_val
;
1920 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
,
1923 dbg("Writing spreg failed in set_serial_baud");
1926 /* Calculate the Divisor */
1929 dev_err(&port
->dev
, "%s - bad baud rate\n", __func__
);
1932 /* Enable access to divisor latch */
1933 Data
= mos7840_port
->shadowLCR
| SERIAL_LCR_DLAB
;
1934 mos7840_port
->shadowLCR
= Data
;
1935 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1937 /* Write the divisor */
1938 Data
= (unsigned char)(divisor
& 0xff);
1939 dbg("set_serial_baud Value to write DLL is %x", Data
);
1940 mos7840_set_uart_reg(port
, DIVISOR_LATCH_LSB
, Data
);
1942 Data
= (unsigned char)((divisor
& 0xff00) >> 8);
1943 dbg("set_serial_baud Value to write DLM is %x", Data
);
1944 mos7840_set_uart_reg(port
, DIVISOR_LATCH_MSB
, Data
);
1946 /* Disable access to divisor latch */
1947 Data
= mos7840_port
->shadowLCR
& ~SERIAL_LCR_DLAB
;
1948 mos7840_port
->shadowLCR
= Data
;
1949 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1955 /*****************************************************************************
1956 * mos7840_change_port_settings
1957 * This routine is called to set the UART on the device to match
1958 * the specified new settings.
1959 *****************************************************************************/
1961 static void mos7840_change_port_settings(struct tty_struct
*tty
,
1962 struct moschip_port
*mos7840_port
, struct ktermios
*old_termios
)
1972 struct usb_serial_port
*port
;
1973 struct usb_serial
*serial
;
1975 if (mos7840_port
== NULL
)
1978 port
= (struct usb_serial_port
*)mos7840_port
->port
;
1980 if (mos7840_port_paranoia_check(port
, __func__
)) {
1981 dbg("%s", "Invalid port");
1985 if (mos7840_serial_paranoia_check(port
->serial
, __func__
)) {
1986 dbg("%s", "Invalid Serial");
1990 serial
= port
->serial
;
1992 dbg("%s - port %d", __func__
, mos7840_port
->port
->number
);
1994 if (!mos7840_port
->open
) {
1995 dbg("%s - port not opened", __func__
);
2001 lParity
= LCR_PAR_NONE
;
2003 cflag
= tty
->termios
.c_cflag
;
2004 iflag
= tty
->termios
.c_iflag
;
2006 /* Change the number of bits */
2007 if (cflag
& CSIZE
) {
2008 switch (cflag
& CSIZE
) {
2026 /* Change the Parity bit */
2027 if (cflag
& PARENB
) {
2028 if (cflag
& PARODD
) {
2029 lParity
= LCR_PAR_ODD
;
2030 dbg("%s - parity = odd", __func__
);
2032 lParity
= LCR_PAR_EVEN
;
2033 dbg("%s - parity = even", __func__
);
2037 dbg("%s - parity = none", __func__
);
2041 lParity
= lParity
| 0x20;
2043 /* Change the Stop bit */
2044 if (cflag
& CSTOPB
) {
2046 dbg("%s - stop bits = 2", __func__
);
2049 dbg("%s - stop bits = 1", __func__
);
2052 /* Update the LCR with the correct value */
2053 mos7840_port
->shadowLCR
&=
2054 ~(LCR_BITS_MASK
| LCR_STOP_MASK
| LCR_PAR_MASK
);
2055 mos7840_port
->shadowLCR
|= (lData
| lParity
| lStop
);
2057 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x",
2058 mos7840_port
->shadowLCR
);
2059 /* Disable Interrupts */
2061 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
2064 mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
2067 mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
2069 /* Send the updated LCR value to the mos7840 */
2070 Data
= mos7840_port
->shadowLCR
;
2072 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
2075 mos7840_port
->shadowMCR
= Data
;
2076 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2078 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2080 /* set up the MCR register and send it to the mos7840 */
2082 mos7840_port
->shadowMCR
= MCR_MASTER_IE
;
2084 mos7840_port
->shadowMCR
|= (MCR_DTR
| MCR_RTS
);
2086 if (cflag
& CRTSCTS
)
2087 mos7840_port
->shadowMCR
|= (MCR_XON_ANY
);
2089 mos7840_port
->shadowMCR
&= ~(MCR_XON_ANY
);
2091 Data
= mos7840_port
->shadowMCR
;
2092 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2094 /* Determine divisor based on baud rate */
2095 baud
= tty_get_baud_rate(tty
);
2098 /* pick a default, any default... */
2099 dbg("%s", "Picked default baud...");
2103 dbg("%s - baud rate = %d", __func__
, baud
);
2104 status
= mos7840_send_cmd_write_baud_rate(mos7840_port
, baud
);
2106 /* Enable Interrupts */
2108 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
2110 if (mos7840_port
->read_urb_busy
== false) {
2111 mos7840_port
->read_urb_busy
= true;
2112 status
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
2114 dbg("usb_submit_urb(read bulk) failed, status = %d",
2116 mos7840_port
->read_urb_busy
= false;
2119 wake_up(&mos7840_port
->delta_msr_wait
);
2120 mos7840_port
->delta_msr_cond
= 1;
2121 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x",
2122 mos7840_port
->shadowLCR
);
2125 /*****************************************************************************
2126 * mos7840_set_termios
2127 * this function is called by the tty driver when it wants to change
2128 * the termios structure
2129 *****************************************************************************/
2131 static void mos7840_set_termios(struct tty_struct
*tty
,
2132 struct usb_serial_port
*port
,
2133 struct ktermios
*old_termios
)
2137 struct usb_serial
*serial
;
2138 struct moschip_port
*mos7840_port
;
2140 if (mos7840_port_paranoia_check(port
, __func__
)) {
2141 dbg("%s", "Invalid port");
2145 serial
= port
->serial
;
2147 if (mos7840_serial_paranoia_check(serial
, __func__
)) {
2148 dbg("%s", "Invalid Serial");
2152 mos7840_port
= mos7840_get_port_private(port
);
2154 if (mos7840_port
== NULL
)
2157 if (!mos7840_port
->open
) {
2158 dbg("%s - port not opened", __func__
);
2162 dbg("%s", "setting termios - ");
2164 cflag
= tty
->termios
.c_cflag
;
2166 dbg("%s - clfag %08x iflag %08x", __func__
,
2167 tty
->termios
.c_cflag
, RELEVANT_IFLAG(tty
->termios
.c_iflag
));
2168 dbg("%s - old clfag %08x old iflag %08x", __func__
,
2169 old_termios
->c_cflag
, RELEVANT_IFLAG(old_termios
->c_iflag
));
2170 dbg("%s - port %d", __func__
, port
->number
);
2172 /* change the port settings to the new ones specified */
2174 mos7840_change_port_settings(tty
, mos7840_port
, old_termios
);
2176 if (!mos7840_port
->read_urb
) {
2177 dbg("%s", "URB KILLED !!!!!");
2181 if (mos7840_port
->read_urb_busy
== false) {
2182 mos7840_port
->read_urb_busy
= true;
2183 status
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
2185 dbg("usb_submit_urb(read bulk) failed, status = %d",
2187 mos7840_port
->read_urb_busy
= false;
2192 /*****************************************************************************
2193 * mos7840_get_lsr_info - get line status register info
2195 * Purpose: Let user call ioctl() to get info when the UART physically
2196 * is emptied. On bus types like RS485, the transmitter must
2197 * release the bus after transmitting. This must be done when
2198 * the transmit shift register is empty, not be done when the
2199 * transmit holding register is empty. This functionality
2200 * allows an RS485 driver to be written in user space.
2201 *****************************************************************************/
2203 static int mos7840_get_lsr_info(struct tty_struct
*tty
,
2204 unsigned int __user
*value
)
2207 unsigned int result
= 0;
2209 count
= mos7840_chars_in_buffer(tty
);
2211 dbg("%s -- Empty", __func__
);
2212 result
= TIOCSER_TEMT
;
2215 if (copy_to_user(value
, &result
, sizeof(int)))
2220 /*****************************************************************************
2221 * mos7840_get_serial_info
2222 * function to get information about serial port
2223 *****************************************************************************/
2225 static int mos7840_get_serial_info(struct moschip_port
*mos7840_port
,
2226 struct serial_struct __user
*retinfo
)
2228 struct serial_struct tmp
;
2230 if (mos7840_port
== NULL
)
2236 memset(&tmp
, 0, sizeof(tmp
));
2238 tmp
.type
= PORT_16550A
;
2239 tmp
.line
= mos7840_port
->port
->serial
->minor
;
2240 tmp
.port
= mos7840_port
->port
->number
;
2242 tmp
.flags
= ASYNC_SKIP_TEST
| ASYNC_AUTO_IRQ
;
2243 tmp
.xmit_fifo_size
= NUM_URBS
* URB_TRANSFER_BUFFER_SIZE
;
2244 tmp
.baud_base
= 9600;
2245 tmp
.close_delay
= 5 * HZ
;
2246 tmp
.closing_wait
= 30 * HZ
;
2248 if (copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)))
2253 static int mos7840_get_icount(struct tty_struct
*tty
,
2254 struct serial_icounter_struct
*icount
)
2256 struct usb_serial_port
*port
= tty
->driver_data
;
2257 struct moschip_port
*mos7840_port
;
2258 struct async_icount cnow
;
2260 mos7840_port
= mos7840_get_port_private(port
);
2261 cnow
= mos7840_port
->icount
;
2264 icount
->cts
= cnow
.cts
;
2265 icount
->dsr
= cnow
.dsr
;
2266 icount
->rng
= cnow
.rng
;
2267 icount
->dcd
= cnow
.dcd
;
2268 icount
->rx
= cnow
.rx
;
2269 icount
->tx
= cnow
.tx
;
2270 icount
->frame
= cnow
.frame
;
2271 icount
->overrun
= cnow
.overrun
;
2272 icount
->parity
= cnow
.parity
;
2273 icount
->brk
= cnow
.brk
;
2274 icount
->buf_overrun
= cnow
.buf_overrun
;
2276 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__
,
2277 port
->number
, icount
->rx
, icount
->tx
);
2281 /*****************************************************************************
2283 * this function handles any ioctl calls to the driver
2284 *****************************************************************************/
2286 static int mos7840_ioctl(struct tty_struct
*tty
,
2287 unsigned int cmd
, unsigned long arg
)
2289 struct usb_serial_port
*port
= tty
->driver_data
;
2290 void __user
*argp
= (void __user
*)arg
;
2291 struct moschip_port
*mos7840_port
;
2293 struct async_icount cnow
;
2294 struct async_icount cprev
;
2296 if (mos7840_port_paranoia_check(port
, __func__
)) {
2297 dbg("%s", "Invalid port");
2301 mos7840_port
= mos7840_get_port_private(port
);
2303 if (mos7840_port
== NULL
)
2306 dbg("%s - port %d, cmd = 0x%x", __func__
, port
->number
, cmd
);
2309 /* return number of bytes available */
2312 dbg("%s (%d) TIOCSERGETLSR", __func__
, port
->number
);
2313 return mos7840_get_lsr_info(tty
, argp
);
2316 dbg("%s (%d) TIOCGSERIAL", __func__
, port
->number
);
2317 return mos7840_get_serial_info(mos7840_port
, argp
);
2320 dbg("%s (%d) TIOCSSERIAL", __func__
, port
->number
);
2324 dbg("%s (%d) TIOCMIWAIT", __func__
, port
->number
);
2325 cprev
= mos7840_port
->icount
;
2327 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2328 mos7840_port
->delta_msr_cond
= 0;
2329 wait_event_interruptible(mos7840_port
->delta_msr_wait
,
2331 delta_msr_cond
== 1));
2333 /* see if a signal did it */
2334 if (signal_pending(current
))
2335 return -ERESTARTSYS
;
2336 cnow
= mos7840_port
->icount
;
2338 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
2339 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
)
2340 return -EIO
; /* no change => error */
2341 if (((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
.rng
)) ||
2342 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
.dsr
)) ||
2343 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
.dcd
)) ||
2344 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
.cts
))) {
2355 return -ENOIOCTLCMD
;
2358 static int mos7810_check(struct usb_serial
*serial
)
2360 int i
, pass_count
= 0;
2361 __u16 data
= 0, mcr_data
= 0;
2362 __u16 test_pattern
= 0x55AA;
2364 /* Store MCR setting */
2365 usb_control_msg(serial
->dev
, usb_rcvctrlpipe(serial
->dev
, 0),
2366 MCS_RDREQ
, MCS_RD_RTYPE
, 0x0300, MODEM_CONTROL_REGISTER
,
2367 &mcr_data
, VENDOR_READ_LENGTH
, MOS_WDR_TIMEOUT
);
2369 for (i
= 0; i
< 16; i
++) {
2370 /* Send the 1-bit test pattern out to MCS7810 test pin */
2371 usb_control_msg(serial
->dev
, usb_sndctrlpipe(serial
->dev
, 0),
2372 MCS_WRREQ
, MCS_WR_RTYPE
,
2373 (0x0300 | (((test_pattern
>> i
) & 0x0001) << 1)),
2374 MODEM_CONTROL_REGISTER
, NULL
, 0, MOS_WDR_TIMEOUT
);
2376 /* Read the test pattern back */
2377 usb_control_msg(serial
->dev
, usb_rcvctrlpipe(serial
->dev
, 0),
2378 MCS_RDREQ
, MCS_RD_RTYPE
, 0, GPIO_REGISTER
, &data
,
2379 VENDOR_READ_LENGTH
, MOS_WDR_TIMEOUT
);
2381 /* If this is a MCS7810 device, both test patterns must match */
2382 if (((test_pattern
>> i
) ^ (~data
>> 1)) & 0x0001)
2388 /* Restore MCR setting */
2389 usb_control_msg(serial
->dev
, usb_sndctrlpipe(serial
->dev
, 0), MCS_WRREQ
,
2390 MCS_WR_RTYPE
, 0x0300 | mcr_data
, MODEM_CONTROL_REGISTER
, NULL
,
2391 0, MOS_WDR_TIMEOUT
);
2393 if (pass_count
== 16)
2399 static int mos7840_calc_num_ports(struct usb_serial
*serial
)
2402 int mos7840_num_ports
;
2404 usb_control_msg(serial
->dev
, usb_rcvctrlpipe(serial
->dev
, 0),
2405 MCS_RDREQ
, MCS_RD_RTYPE
, 0, GPIO_REGISTER
, &data
,
2406 VENDOR_READ_LENGTH
, MOS_WDR_TIMEOUT
);
2408 if (serial
->dev
->descriptor
.idProduct
== MOSCHIP_DEVICE_ID_7810
||
2409 serial
->dev
->descriptor
.idProduct
== MOSCHIP_DEVICE_ID_7820
) {
2410 device_type
= serial
->dev
->descriptor
.idProduct
;
2412 /* For a MCS7840 device GPIO0 must be set to 1 */
2413 if ((data
& 0x01) == 1)
2414 device_type
= MOSCHIP_DEVICE_ID_7840
;
2415 else if (mos7810_check(serial
))
2416 device_type
= MOSCHIP_DEVICE_ID_7810
;
2418 device_type
= MOSCHIP_DEVICE_ID_7820
;
2421 mos7840_num_ports
= (device_type
>> 4) & 0x000F;
2422 serial
->num_bulk_in
= mos7840_num_ports
;
2423 serial
->num_bulk_out
= mos7840_num_ports
;
2424 serial
->num_ports
= mos7840_num_ports
;
2426 return mos7840_num_ports
;
2429 /****************************************************************************
2431 ****************************************************************************/
2433 static int mos7840_startup(struct usb_serial
*serial
)
2435 struct moschip_port
*mos7840_port
;
2436 struct usb_device
*dev
;
2441 dbg("%s", "Invalid Handler");
2447 /* we set up the pointers to the endpoints in the mos7840_open *
2448 * function, as the structures aren't created yet. */
2450 /* set up port private structures */
2451 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2452 dbg ("mos7840_startup: configuring port %d............", i
);
2453 mos7840_port
= kzalloc(sizeof(struct moschip_port
), GFP_KERNEL
);
2454 if (mos7840_port
== NULL
) {
2455 dev_err(&dev
->dev
, "%s - Out of memory\n", __func__
);
2457 i
--; /* don't follow NULL pointer cleaning up */
2461 /* Initialize all port interrupt end point to port 0 int
2462 * endpoint. Our device has only one interrupt end point
2463 * common to all port */
2465 mos7840_port
->port
= serial
->port
[i
];
2466 mos7840_set_port_private(serial
->port
[i
], mos7840_port
);
2467 spin_lock_init(&mos7840_port
->pool_lock
);
2469 /* minor is not initialised until later by
2470 * usb-serial.c:get_free_serial() and cannot therefore be used
2471 * to index device instances */
2472 mos7840_port
->port_num
= i
+ 1;
2473 dbg ("serial->port[i]->number = %d", serial
->port
[i
]->number
);
2474 dbg ("serial->port[i]->serial->minor = %d", serial
->port
[i
]->serial
->minor
);
2475 dbg ("mos7840_port->port_num = %d", mos7840_port
->port_num
);
2476 dbg ("serial->minor = %d", serial
->minor
);
2478 if (mos7840_port
->port_num
== 1) {
2479 mos7840_port
->SpRegOffset
= 0x0;
2480 mos7840_port
->ControlRegOffset
= 0x1;
2481 mos7840_port
->DcrRegOffset
= 0x4;
2482 } else if ((mos7840_port
->port_num
== 2)
2483 && (serial
->num_ports
== 4)) {
2484 mos7840_port
->SpRegOffset
= 0x8;
2485 mos7840_port
->ControlRegOffset
= 0x9;
2486 mos7840_port
->DcrRegOffset
= 0x16;
2487 } else if ((mos7840_port
->port_num
== 2)
2488 && (serial
->num_ports
== 2)) {
2489 mos7840_port
->SpRegOffset
= 0xa;
2490 mos7840_port
->ControlRegOffset
= 0xb;
2491 mos7840_port
->DcrRegOffset
= 0x19;
2492 } else if ((mos7840_port
->port_num
== 3)
2493 && (serial
->num_ports
== 4)) {
2494 mos7840_port
->SpRegOffset
= 0xa;
2495 mos7840_port
->ControlRegOffset
= 0xb;
2496 mos7840_port
->DcrRegOffset
= 0x19;
2497 } else if ((mos7840_port
->port_num
== 4)
2498 && (serial
->num_ports
== 4)) {
2499 mos7840_port
->SpRegOffset
= 0xc;
2500 mos7840_port
->ControlRegOffset
= 0xd;
2501 mos7840_port
->DcrRegOffset
= 0x1c;
2503 mos7840_dump_serial_port(mos7840_port
);
2504 mos7840_set_port_private(serial
->port
[i
], mos7840_port
);
2506 /* enable rx_disable bit in control register */
2507 status
= mos7840_get_reg_sync(serial
->port
[i
],
2508 mos7840_port
->ControlRegOffset
, &Data
);
2510 dbg("Reading ControlReg failed status-0x%x", status
);
2513 dbg("ControlReg Reading success val is %x, status%d",
2515 Data
|= 0x08; /* setting driver done bit */
2516 Data
|= 0x04; /* sp1_bit to have cts change reflect in
2519 /* Data |= 0x20; //rx_disable bit */
2520 status
= mos7840_set_reg_sync(serial
->port
[i
],
2521 mos7840_port
->ControlRegOffset
, Data
);
2523 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status
);
2526 dbg("ControlReg Writing success(rx_disable) status%d",
2529 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2532 status
= mos7840_set_reg_sync(serial
->port
[i
],
2533 (__u16
) (mos7840_port
->DcrRegOffset
+ 0), Data
);
2535 dbg("Writing DCR0 failed status-0x%x", status
);
2538 dbg("DCR0 Writing success status%d", status
);
2541 status
= mos7840_set_reg_sync(serial
->port
[i
],
2542 (__u16
) (mos7840_port
->DcrRegOffset
+ 1), Data
);
2544 dbg("Writing DCR1 failed status-0x%x", status
);
2547 dbg("DCR1 Writing success status%d", status
);
2550 status
= mos7840_set_reg_sync(serial
->port
[i
],
2551 (__u16
) (mos7840_port
->DcrRegOffset
+ 2), Data
);
2553 dbg("Writing DCR2 failed status-0x%x", status
);
2556 dbg("DCR2 Writing success status%d", status
);
2558 /* write values in clkstart0x0 and clkmulti 0x20 */
2560 status
= mos7840_set_reg_sync(serial
->port
[i
],
2561 CLK_START_VALUE_REGISTER
, Data
);
2563 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status
);
2566 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status
);
2569 status
= mos7840_set_reg_sync(serial
->port
[i
],
2570 CLK_MULTI_REGISTER
, Data
);
2572 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x",
2576 dbg("CLK_MULTI_REGISTER Writing success status%d",
2579 /* write value 0x0 to scratchpad register */
2581 status
= mos7840_set_uart_reg(serial
->port
[i
],
2582 SCRATCH_PAD_REGISTER
, Data
);
2584 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x",
2588 dbg("SCRATCH_PAD_REGISTER Writing success status%d",
2591 /* Zero Length flag register */
2592 if ((mos7840_port
->port_num
!= 1)
2593 && (serial
->num_ports
== 2)) {
2596 status
= mos7840_set_reg_sync(serial
->port
[i
],
2598 ((__u16
)mos7840_port
->port_num
)), Data
);
2599 dbg("ZLIP offset %x",
2601 ((__u16
) mos7840_port
->port_num
)));
2603 dbg("Writing ZLP_REG%d failed status-0x%x",
2607 dbg("ZLP_REG%d Writing success status%d",
2611 status
= mos7840_set_reg_sync(serial
->port
[i
],
2613 ((__u16
)mos7840_port
->port_num
) - 0x1), Data
);
2614 dbg("ZLIP offset %x",
2616 ((__u16
) mos7840_port
->port_num
) - 0x1));
2618 dbg("Writing ZLP_REG%d failed status-0x%x",
2622 dbg("ZLP_REG%d Writing success status%d",
2626 mos7840_port
->control_urb
= usb_alloc_urb(0, GFP_KERNEL
);
2627 mos7840_port
->ctrl_buf
= kmalloc(16, GFP_KERNEL
);
2628 mos7840_port
->dr
= kmalloc(sizeof(struct usb_ctrlrequest
),
2630 if (!mos7840_port
->control_urb
|| !mos7840_port
->ctrl_buf
||
2631 !mos7840_port
->dr
) {
2636 mos7840_port
->has_led
= false;
2638 /* Initialize LED timers */
2639 if (device_type
== MOSCHIP_DEVICE_ID_7810
) {
2640 mos7840_port
->has_led
= true;
2642 init_timer(&mos7840_port
->led_timer1
);
2643 mos7840_port
->led_timer1
.function
= mos7840_led_off
;
2644 mos7840_port
->led_timer1
.expires
=
2645 jiffies
+ msecs_to_jiffies(LED_ON_MS
);
2646 mos7840_port
->led_timer1
.data
=
2647 (unsigned long)mos7840_port
;
2649 init_timer(&mos7840_port
->led_timer2
);
2650 mos7840_port
->led_timer2
.function
=
2651 mos7840_led_flag_off
;
2652 mos7840_port
->led_timer2
.expires
=
2653 jiffies
+ msecs_to_jiffies(LED_OFF_MS
);
2654 mos7840_port
->led_timer2
.data
=
2655 (unsigned long)mos7840_port
;
2657 mos7840_port
->led_flag
= false;
2660 mos7840_set_led_sync(serial
->port
[i
],
2661 MODEM_CONTROL_REGISTER
, 0x0300);
2664 dbg ("mos7840_startup: all ports configured...........");
2666 /* Zero Length flag enable */
2668 status
= mos7840_set_reg_sync(serial
->port
[0], ZLP_REG5
, Data
);
2670 dbg("Writing ZLP_REG5 failed status-0x%x", status
);
2673 dbg("ZLP_REG5 Writing success status%d", status
);
2675 /* setting configuration feature to one */
2676 usb_control_msg(serial
->dev
, usb_sndctrlpipe(serial
->dev
, 0),
2677 (__u8
) 0x03, 0x00, 0x01, 0x00, NULL
, 0x00, MOS_WDR_TIMEOUT
);
2680 for (/* nothing */; i
>= 0; i
--) {
2681 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
2683 kfree(mos7840_port
->dr
);
2684 kfree(mos7840_port
->ctrl_buf
);
2685 usb_free_urb(mos7840_port
->control_urb
);
2686 kfree(mos7840_port
);
2687 serial
->port
[i
] = NULL
;
2692 /****************************************************************************
2693 * mos7840_disconnect
2694 * This function is called whenever the device is removed from the usb bus.
2695 ****************************************************************************/
2697 static void mos7840_disconnect(struct usb_serial
*serial
)
2700 unsigned long flags
;
2701 struct moschip_port
*mos7840_port
;
2704 dbg("%s", "Invalid Handler");
2708 /* check for the ports to be closed,close the ports and disconnect */
2710 /* free private structure allocated for serial port *
2711 * stop reads and writes on all ports */
2713 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2714 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
2715 dbg ("mos7840_port %d = %p", i
, mos7840_port
);
2717 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
2718 mos7840_port
->zombie
= 1;
2719 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
2720 usb_kill_urb(mos7840_port
->control_urb
);
2725 /****************************************************************************
2727 * This function is called when the usb_serial structure is freed.
2728 ****************************************************************************/
2730 static void mos7840_release(struct usb_serial
*serial
)
2733 struct moschip_port
*mos7840_port
;
2736 dbg("%s", "Invalid Handler");
2740 /* check for the ports to be closed,close the ports and disconnect */
2742 /* free private structure allocated for serial port *
2743 * stop reads and writes on all ports */
2745 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2746 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
2747 dbg("mos7840_port %d = %p", i
, mos7840_port
);
2749 if (mos7840_port
->has_led
) {
2751 mos7840_set_led_sync(mos7840_port
->port
,
2752 MODEM_CONTROL_REGISTER
, 0x0300);
2754 del_timer_sync(&mos7840_port
->led_timer1
);
2755 del_timer_sync(&mos7840_port
->led_timer2
);
2757 kfree(mos7840_port
->ctrl_buf
);
2758 kfree(mos7840_port
->dr
);
2759 kfree(mos7840_port
);
2764 static struct usb_serial_driver moschip7840_4port_device
= {
2766 .owner
= THIS_MODULE
,
2769 .description
= DRIVER_DESC
,
2770 .id_table
= id_table
,
2772 .open
= mos7840_open
,
2773 .close
= mos7840_close
,
2774 .write
= mos7840_write
,
2775 .write_room
= mos7840_write_room
,
2776 .chars_in_buffer
= mos7840_chars_in_buffer
,
2777 .throttle
= mos7840_throttle
,
2778 .unthrottle
= mos7840_unthrottle
,
2779 .calc_num_ports
= mos7840_calc_num_ports
,
2780 #ifdef MCSSerialProbe
2781 .probe
= mos7840_serial_probe
,
2783 .ioctl
= mos7840_ioctl
,
2784 .set_termios
= mos7840_set_termios
,
2785 .break_ctl
= mos7840_break
,
2786 .tiocmget
= mos7840_tiocmget
,
2787 .tiocmset
= mos7840_tiocmset
,
2788 .get_icount
= mos7840_get_icount
,
2789 .attach
= mos7840_startup
,
2790 .disconnect
= mos7840_disconnect
,
2791 .release
= mos7840_release
,
2792 .read_bulk_callback
= mos7840_bulk_in_callback
,
2793 .read_int_callback
= mos7840_interrupt_callback
,
2796 static struct usb_serial_driver
* const serial_drivers
[] = {
2797 &moschip7840_4port_device
, NULL
2800 module_usb_serial_driver(serial_drivers
, id_table
);
2802 MODULE_DESCRIPTION(DRIVER_DESC
);
2803 MODULE_LICENSE("GPL");
2805 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
2806 MODULE_PARM_DESC(debug
, "Debug enabled or not");