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 #define MOSCHIP_DEVICE_ID_7810 0x7810
118 /* The native component can have its vendor/device id's overridden
119 * in vendor-specific implementations. Such devices can be handled
120 * by making a change here, in id_table.
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))
177 #define GPIO_REGISTER ((__u16)(0x07))
179 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
182 * URB POOL related defines
184 #define NUM_URBS 16 /* URB Count */
185 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
187 /* LED on/off milliseconds*/
188 #define LED_ON_MS 500
189 #define LED_OFF_MS 500
191 static int device_type
;
193 static const struct usb_device_id id_table
[] = {
194 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7840
)},
195 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7820
)},
196 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7810
)},
197 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_2
)},
198 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_2P
)},
199 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_4
)},
200 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_4P
)},
201 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_US9ML2_2
)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_US9ML2_4
)},
203 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USPTL4_2
)},
204 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USPTL4_4
)},
205 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_2
)},
206 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_2P
)},
207 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_4
)},
208 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_4P
)},
209 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL2_4
)},
210 {USB_DEVICE(USB_VENDOR_ID_ATENINTL
, ATENINTL_DEVICE_ID_UC2324
)},
211 {USB_DEVICE(USB_VENDOR_ID_ATENINTL
, ATENINTL_DEVICE_ID_UC2322
)},
212 {} /* terminating entry */
214 MODULE_DEVICE_TABLE(usb
, id_table
);
216 /* This structure holds all of the local port information */
218 struct moschip_port
{
219 int port_num
; /*Actual port number in the device(1,2,etc) */
220 struct urb
*write_urb
; /* write URB for this port */
221 struct urb
*read_urb
; /* read URB for this port */
223 __u8 shadowLCR
; /* last LCR value received */
224 __u8 shadowMCR
; /* last MCR value received */
228 wait_queue_head_t wait_chase
; /* for handling sleeping while waiting for chase to finish */
229 wait_queue_head_t delta_msr_wait
; /* for handling sleeping while waiting for msr change to happen */
231 struct async_icount icount
;
232 struct usb_serial_port
*port
; /* loop back to the owner of this object */
236 __u8 ControlRegOffset
;
238 /* for processing control URBS in interrupt context */
239 struct urb
*control_urb
;
240 struct usb_ctrlrequest
*dr
;
244 spinlock_t pool_lock
;
245 struct urb
*write_urb_pool
[NUM_URBS
];
249 /* For device(s) with LED indicator */
252 struct timer_list led_timer1
; /* Timer for LED on */
253 struct timer_list led_timer2
; /* Timer for LED off */
259 * mos7840_set_reg_sync
260 * To set the Control register by calling usb_fill_control_urb function
261 * by passing usb_sndctrlpipe function as parameter.
264 static int mos7840_set_reg_sync(struct usb_serial_port
*port
, __u16 reg
,
267 struct usb_device
*dev
= port
->serial
->dev
;
269 dbg("mos7840_set_reg_sync offset is %x, value %x", reg
, val
);
271 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), MCS_WRREQ
,
272 MCS_WR_RTYPE
, val
, reg
, NULL
, 0,
277 * mos7840_get_reg_sync
278 * To set the Uart register by calling usb_fill_control_urb function by
279 * passing usb_rcvctrlpipe function as parameter.
282 static int mos7840_get_reg_sync(struct usb_serial_port
*port
, __u16 reg
,
285 struct usb_device
*dev
= port
->serial
->dev
;
289 buf
= kmalloc(VENDOR_READ_LENGTH
, GFP_KERNEL
);
293 ret
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0), MCS_RDREQ
,
294 MCS_RD_RTYPE
, 0, reg
, buf
, VENDOR_READ_LENGTH
,
297 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg
, *val
);
304 * mos7840_set_uart_reg
305 * To set the Uart register by calling usb_fill_control_urb function by
306 * passing usb_sndctrlpipe function as parameter.
309 static int mos7840_set_uart_reg(struct usb_serial_port
*port
, __u16 reg
,
313 struct usb_device
*dev
= port
->serial
->dev
;
315 /* For the UART control registers, the application number need
317 if (port
->serial
->num_ports
== 4) {
318 val
|= (((__u16
) port
->number
-
319 (__u16
) (port
->serial
->minor
)) + 1) << 8;
320 dbg("mos7840_set_uart_reg application number is %x", val
);
322 if (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) == 0) {
323 val
|= (((__u16
) port
->number
-
324 (__u16
) (port
->serial
->minor
)) + 1) << 8;
325 dbg("mos7840_set_uart_reg application number is %x",
329 (((__u16
) port
->number
-
330 (__u16
) (port
->serial
->minor
)) + 2) << 8;
331 dbg("mos7840_set_uart_reg application number is %x",
335 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), MCS_WRREQ
,
336 MCS_WR_RTYPE
, val
, reg
, NULL
, 0,
342 * mos7840_get_uart_reg
343 * To set the Control register by calling usb_fill_control_urb function
344 * by passing usb_rcvctrlpipe function as parameter.
346 static int mos7840_get_uart_reg(struct usb_serial_port
*port
, __u16 reg
,
349 struct usb_device
*dev
= port
->serial
->dev
;
354 buf
= kmalloc(VENDOR_READ_LENGTH
, GFP_KERNEL
);
358 /* dbg("application number is %4x",
359 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
360 /* Wval is same as application number */
361 if (port
->serial
->num_ports
== 4) {
363 (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) +
365 dbg("mos7840_get_uart_reg application number is %x", Wval
);
367 if (((__u16
) port
->number
- (__u16
) (port
->serial
->minor
)) == 0) {
368 Wval
= (((__u16
) port
->number
-
369 (__u16
) (port
->serial
->minor
)) + 1) << 8;
370 dbg("mos7840_get_uart_reg application number is %x",
373 Wval
= (((__u16
) port
->number
-
374 (__u16
) (port
->serial
->minor
)) + 2) << 8;
375 dbg("mos7840_get_uart_reg application number is %x",
379 ret
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0), MCS_RDREQ
,
380 MCS_RD_RTYPE
, Wval
, reg
, buf
, VENDOR_READ_LENGTH
,
388 static void mos7840_dump_serial_port(struct moschip_port
*mos7840_port
)
391 dbg("***************************************");
392 dbg("SpRegOffset is %2x", mos7840_port
->SpRegOffset
);
393 dbg("ControlRegOffset is %2x", mos7840_port
->ControlRegOffset
);
394 dbg("DCRRegOffset is %2x", mos7840_port
->DcrRegOffset
);
395 dbg("***************************************");
399 /************************************************************************/
400 /************************************************************************/
401 /* I N T E R F A C E F U N C T I O N S */
402 /* I N T E R F A C E F U N C T I O N S */
403 /************************************************************************/
404 /************************************************************************/
406 static inline void mos7840_set_port_private(struct usb_serial_port
*port
,
407 struct moschip_port
*data
)
409 usb_set_serial_port_data(port
, (void *)data
);
412 static inline struct moschip_port
*mos7840_get_port_private(struct
416 return (struct moschip_port
*)usb_get_serial_port_data(port
);
419 static void mos7840_handle_new_msr(struct moschip_port
*port
, __u8 new_msr
)
421 struct moschip_port
*mos7840_port
;
422 struct async_icount
*icount
;
424 icount
= &mos7840_port
->icount
;
426 (MOS_MSR_DELTA_CTS
| MOS_MSR_DELTA_DSR
| MOS_MSR_DELTA_RI
|
428 icount
= &mos7840_port
->icount
;
430 /* update input line counters */
431 if (new_msr
& MOS_MSR_DELTA_CTS
) {
435 if (new_msr
& MOS_MSR_DELTA_DSR
) {
439 if (new_msr
& MOS_MSR_DELTA_CD
) {
443 if (new_msr
& MOS_MSR_DELTA_RI
) {
450 static void mos7840_handle_new_lsr(struct moschip_port
*port
, __u8 new_lsr
)
452 struct async_icount
*icount
;
454 dbg("%s - %02x", __func__
, new_lsr
);
456 if (new_lsr
& SERIAL_LSR_BI
) {
458 * Parity and Framing errors only count if they
459 * occur exclusive of a break being
462 new_lsr
&= (__u8
) (SERIAL_LSR_OE
| SERIAL_LSR_BI
);
465 /* update input line counters */
466 icount
= &port
->icount
;
467 if (new_lsr
& SERIAL_LSR_BI
) {
471 if (new_lsr
& SERIAL_LSR_OE
) {
475 if (new_lsr
& SERIAL_LSR_PE
) {
479 if (new_lsr
& SERIAL_LSR_FE
) {
485 /************************************************************************/
486 /************************************************************************/
487 /* U S B C A L L B A C K F U N C T I O N S */
488 /* U S B C A L L B A C K F U N C T I O N S */
489 /************************************************************************/
490 /************************************************************************/
492 static void mos7840_control_callback(struct urb
*urb
)
495 struct moschip_port
*mos7840_port
;
498 int status
= urb
->status
;
500 mos7840_port
= urb
->context
;
509 /* this urb is terminated, clean up */
510 dbg("%s - urb shutting down with status: %d", __func__
,
514 dbg("%s - nonzero urb status received: %d", __func__
,
519 dbg("%s urb buffer size is %d", __func__
, urb
->actual_length
);
520 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__
,
521 mos7840_port
->MsrLsr
, mos7840_port
->port_num
);
522 data
= urb
->transfer_buffer
;
523 regval
= (__u8
) data
[0];
524 dbg("%s data is %x", __func__
, regval
);
525 if (mos7840_port
->MsrLsr
== 0)
526 mos7840_handle_new_msr(mos7840_port
, regval
);
527 else if (mos7840_port
->MsrLsr
== 1)
528 mos7840_handle_new_lsr(mos7840_port
, regval
);
531 spin_lock(&mos7840_port
->pool_lock
);
532 if (!mos7840_port
->zombie
)
533 result
= usb_submit_urb(mos7840_port
->int_urb
, GFP_ATOMIC
);
534 spin_unlock(&mos7840_port
->pool_lock
);
536 dev_err(&urb
->dev
->dev
,
537 "%s - Error %d submitting interrupt urb\n",
542 static int mos7840_get_reg(struct moschip_port
*mcs
, __u16 Wval
, __u16 reg
,
545 struct usb_device
*dev
= mcs
->port
->serial
->dev
;
546 struct usb_ctrlrequest
*dr
= mcs
->dr
;
547 unsigned char *buffer
= mcs
->ctrl_buf
;
550 dr
->bRequestType
= MCS_RD_RTYPE
;
551 dr
->bRequest
= MCS_RDREQ
;
552 dr
->wValue
= cpu_to_le16(Wval
); /* 0 */
553 dr
->wIndex
= cpu_to_le16(reg
);
554 dr
->wLength
= cpu_to_le16(2);
556 usb_fill_control_urb(mcs
->control_urb
, dev
, usb_rcvctrlpipe(dev
, 0),
557 (unsigned char *)dr
, buffer
, 2,
558 mos7840_control_callback
, mcs
);
559 mcs
->control_urb
->transfer_buffer_length
= 2;
560 ret
= usb_submit_urb(mcs
->control_urb
, GFP_ATOMIC
);
564 static void mos7840_set_led_callback(struct urb
*urb
)
566 switch (urb
->status
) {
573 /* This urb is terminated, clean up */
574 dbg("%s - urb shutting down with status: %d", __func__
,
578 dbg("%s - nonzero urb status received: %d", __func__
,
583 static void mos7840_set_led_async(struct moschip_port
*mcs
, __u16 wval
,
586 struct usb_device
*dev
= mcs
->port
->serial
->dev
;
587 struct usb_ctrlrequest
*dr
= mcs
->dr
;
589 dr
->bRequestType
= MCS_WR_RTYPE
;
590 dr
->bRequest
= MCS_WRREQ
;
591 dr
->wValue
= cpu_to_le16(wval
);
592 dr
->wIndex
= cpu_to_le16(reg
);
593 dr
->wLength
= cpu_to_le16(0);
595 usb_fill_control_urb(mcs
->control_urb
, dev
, usb_sndctrlpipe(dev
, 0),
596 (unsigned char *)dr
, NULL
, 0, mos7840_set_led_callback
, NULL
);
598 usb_submit_urb(mcs
->control_urb
, GFP_ATOMIC
);
601 static void mos7840_set_led_sync(struct usb_serial_port
*port
, __u16 reg
,
604 struct usb_device
*dev
= port
->serial
->dev
;
606 usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), MCS_WRREQ
, MCS_WR_RTYPE
,
607 val
, reg
, NULL
, 0, MOS_WDR_TIMEOUT
);
610 static void mos7840_led_off(unsigned long arg
)
612 struct moschip_port
*mcs
= (struct moschip_port
*) arg
;
615 mos7840_set_led_async(mcs
, 0x0300, MODEM_CONTROL_REGISTER
);
616 mod_timer(&mcs
->led_timer2
,
617 jiffies
+ msecs_to_jiffies(LED_OFF_MS
));
620 static void mos7840_led_flag_off(unsigned long arg
)
622 struct moschip_port
*mcs
= (struct moschip_port
*) arg
;
624 mcs
->led_flag
= false;
627 /*****************************************************************************
628 * mos7840_interrupt_callback
629 * this is the callback function for when we have received data on the
630 * interrupt endpoint.
631 *****************************************************************************/
633 static void mos7840_interrupt_callback(struct urb
*urb
)
637 struct moschip_port
*mos7840_port
;
638 struct usb_serial
*serial
;
643 __u16 wval
, wreg
= 0;
644 int status
= urb
->status
;
653 /* this urb is terminated, clean up */
654 dbg("%s - urb shutting down with status: %d", __func__
,
658 dbg("%s - nonzero urb status received: %d", __func__
,
663 length
= urb
->actual_length
;
664 data
= urb
->transfer_buffer
;
666 serial
= urb
->context
;
668 /* Moschip get 5 bytes
669 * Byte 1 IIR Port 1 (port.number is 0)
670 * Byte 2 IIR Port 2 (port.number is 1)
671 * Byte 3 IIR Port 3 (port.number is 2)
672 * Byte 4 IIR Port 4 (port.number is 3)
673 * Byte 5 FIFO status for both */
675 if (length
&& length
> 5) {
676 dbg("%s", "Wrong data !!!");
680 sp
[0] = (__u8
) data
[0];
681 sp
[1] = (__u8
) data
[1];
682 sp
[2] = (__u8
) data
[2];
683 sp
[3] = (__u8
) data
[3];
686 for (i
= 0; i
< serial
->num_ports
; i
++) {
687 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
689 (((__u16
) serial
->port
[i
]->number
-
690 (__u16
) (serial
->minor
)) + 1) << 8;
691 if (mos7840_port
->open
) {
693 dbg("SP%d No Interrupt !!!", i
);
695 switch (sp
[i
] & 0x0f) {
697 dbg("Serial Port %d: Receiver status error or ", i
);
698 dbg("address bit detected in 9-bit mode");
699 mos7840_port
->MsrLsr
= 1;
700 wreg
= LINE_STATUS_REGISTER
;
703 dbg("Serial Port %d: Modem status change", i
);
704 mos7840_port
->MsrLsr
= 0;
705 wreg
= MODEM_STATUS_REGISTER
;
708 spin_lock(&mos7840_port
->pool_lock
);
709 if (!mos7840_port
->zombie
) {
710 rv
= mos7840_get_reg(mos7840_port
, wval
, wreg
, &Data
);
712 spin_unlock(&mos7840_port
->pool_lock
);
715 spin_unlock(&mos7840_port
->pool_lock
);
720 /* the completion handler for the control urb will resubmit */
723 result
= usb_submit_urb(urb
, GFP_ATOMIC
);
725 dev_err(&urb
->dev
->dev
,
726 "%s - Error %d submitting interrupt urb\n",
731 static int mos7840_port_paranoia_check(struct usb_serial_port
*port
,
732 const char *function
)
735 dbg("%s - port == NULL", function
);
739 dbg("%s - port->serial == NULL", function
);
746 /* Inline functions to check the sanity of a pointer that is passed to us */
747 static int mos7840_serial_paranoia_check(struct usb_serial
*serial
,
748 const char *function
)
751 dbg("%s - serial == NULL", function
);
755 dbg("%s - serial->type == NULL!", function
);
762 static struct usb_serial
*mos7840_get_usb_serial(struct usb_serial_port
*port
,
763 const char *function
)
765 /* if no port was specified, or it fails a paranoia check */
767 mos7840_port_paranoia_check(port
, function
) ||
768 mos7840_serial_paranoia_check(port
->serial
, function
)) {
769 /* then say that we don't have a valid usb_serial thing,
770 * which will end up genrating -ENODEV return values */
777 /*****************************************************************************
778 * mos7840_bulk_in_callback
779 * this is the callback function for when we have received data on the
781 *****************************************************************************/
783 static void mos7840_bulk_in_callback(struct urb
*urb
)
787 struct usb_serial
*serial
;
788 struct usb_serial_port
*port
;
789 struct moschip_port
*mos7840_port
;
790 struct tty_struct
*tty
;
791 int status
= urb
->status
;
793 mos7840_port
= urb
->context
;
795 dbg("%s", "NULL mos7840_port pointer");
800 dbg("nonzero read bulk status received: %d", status
);
801 mos7840_port
->read_urb_busy
= false;
805 port
= (struct usb_serial_port
*)mos7840_port
->port
;
806 if (mos7840_port_paranoia_check(port
, __func__
)) {
807 dbg("%s", "Port Paranoia failed");
808 mos7840_port
->read_urb_busy
= false;
812 serial
= mos7840_get_usb_serial(port
, __func__
);
814 dbg("%s", "Bad serial pointer");
815 mos7840_port
->read_urb_busy
= false;
819 data
= urb
->transfer_buffer
;
821 if (urb
->actual_length
) {
822 tty
= tty_port_tty_get(&mos7840_port
->port
->port
);
824 tty_insert_flip_string(tty
, data
, urb
->actual_length
);
826 tty_flip_buffer_push(tty
);
829 mos7840_port
->icount
.rx
+= urb
->actual_length
;
831 dbg("mos7840_port->icount.rx is %d:",
832 mos7840_port
->icount
.rx
);
835 if (!mos7840_port
->read_urb
) {
836 dbg("%s", "URB KILLED !!!");
837 mos7840_port
->read_urb_busy
= false;
842 if (mos7840_port
->has_led
&& !mos7840_port
->led_flag
) {
843 mos7840_port
->led_flag
= true;
844 mos7840_set_led_async(mos7840_port
, 0x0301,
845 MODEM_CONTROL_REGISTER
);
846 mod_timer(&mos7840_port
->led_timer1
,
847 jiffies
+ msecs_to_jiffies(LED_ON_MS
));
850 mos7840_port
->read_urb_busy
= true;
851 retval
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
854 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval
);
855 mos7840_port
->read_urb_busy
= false;
859 /*****************************************************************************
860 * mos7840_bulk_out_data_callback
861 * this is the callback function for when we have finished sending
862 * serial data on the bulk out endpoint.
863 *****************************************************************************/
865 static void mos7840_bulk_out_data_callback(struct urb
*urb
)
867 struct moschip_port
*mos7840_port
;
868 struct tty_struct
*tty
;
869 int status
= urb
->status
;
872 mos7840_port
= urb
->context
;
873 spin_lock(&mos7840_port
->pool_lock
);
874 for (i
= 0; i
< NUM_URBS
; i
++) {
875 if (urb
== mos7840_port
->write_urb_pool
[i
]) {
876 mos7840_port
->busy
[i
] = 0;
880 spin_unlock(&mos7840_port
->pool_lock
);
883 dbg("nonzero write bulk status received:%d", status
);
887 if (mos7840_port_paranoia_check(mos7840_port
->port
, __func__
)) {
888 dbg("%s", "Port Paranoia failed");
892 tty
= tty_port_tty_get(&mos7840_port
->port
->port
);
893 if (tty
&& mos7840_port
->open
)
899 /************************************************************************/
900 /* 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 */
901 /************************************************************************/
902 #ifdef MCSSerialProbe
903 static int mos7840_serial_probe(struct usb_serial
*serial
,
904 const struct usb_device_id
*id
)
907 /*need to implement the mode_reg reading and updating\
908 structures usb_serial_ device_type\
909 (i.e num_ports, num_bulkin,bulkout etc) */
910 /* Also we can update the changes attach */
915 /*****************************************************************************
917 * this function is called by the tty driver when a port is opened
918 * If successful, we return 0
919 * Otherwise we return a negative error number.
920 *****************************************************************************/
922 static int mos7840_open(struct tty_struct
*tty
, struct usb_serial_port
*port
)
926 struct usb_serial
*serial
;
930 struct moschip_port
*mos7840_port
;
931 struct moschip_port
*port0
;
933 if (mos7840_port_paranoia_check(port
, __func__
)) {
934 dbg("%s", "Port Paranoia failed");
938 serial
= port
->serial
;
940 if (mos7840_serial_paranoia_check(serial
, __func__
)) {
941 dbg("%s", "Serial Paranoia failed");
945 mos7840_port
= mos7840_get_port_private(port
);
946 port0
= mos7840_get_port_private(serial
->port
[0]);
948 if (mos7840_port
== NULL
|| port0
== NULL
)
951 usb_clear_halt(serial
->dev
, port
->write_urb
->pipe
);
952 usb_clear_halt(serial
->dev
, port
->read_urb
->pipe
);
955 /* Initialising the write urb pool */
956 for (j
= 0; j
< NUM_URBS
; ++j
) {
957 urb
= usb_alloc_urb(0, GFP_KERNEL
);
958 mos7840_port
->write_urb_pool
[j
] = urb
;
961 dev_err(&port
->dev
, "No more urbs???\n");
965 urb
->transfer_buffer
= kmalloc(URB_TRANSFER_BUFFER_SIZE
,
967 if (!urb
->transfer_buffer
) {
969 mos7840_port
->write_urb_pool
[j
] = NULL
;
971 "%s-out of memory for urb buffers.\n",
977 /*****************************************************************************
978 * Initialize MCS7840 -- Write Init values to corresponding Registers
986 * 0x08 : SP1/2 Control Reg
987 *****************************************************************************/
989 /* NEED to check the following Block */
992 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
, &Data
);
994 dbg("Reading Spreg failed");
998 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
1000 dbg("writing Spreg failed");
1005 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
1007 dbg("writing Spreg failed");
1010 /* End of block to be checked */
1013 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1016 dbg("Reading Controlreg failed");
1019 Data
|= 0x08; /* Driver done bit */
1020 Data
|= 0x20; /* rx_disable */
1021 status
= mos7840_set_reg_sync(port
,
1022 mos7840_port
->ControlRegOffset
, Data
);
1024 dbg("writing Controlreg failed");
1027 /* do register settings here */
1028 /* Set all regs to the device default values. */
1029 /***********************************
1030 * First Disable all interrupts.
1031 ***********************************/
1033 status
= mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
1035 dbg("disabling interrupts failed");
1038 /* Set FIFO_CONTROL_REGISTER to the default value */
1040 status
= mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
1042 dbg("Writing FIFO_CONTROL_REGISTER failed");
1047 status
= mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
1049 dbg("Writing FIFO_CONTROL_REGISTER failed");
1054 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1055 mos7840_port
->shadowLCR
= Data
;
1058 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
1059 mos7840_port
->shadowMCR
= Data
;
1062 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
1063 mos7840_port
->shadowLCR
= Data
;
1065 Data
|= SERIAL_LCR_DLAB
; /* data latch enable in LCR 0x80 */
1066 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1069 status
= mos7840_set_uart_reg(port
, DIVISOR_LATCH_LSB
, Data
);
1072 status
= mos7840_set_uart_reg(port
, DIVISOR_LATCH_MSB
, Data
);
1075 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
1077 Data
= Data
& ~SERIAL_LCR_DLAB
;
1078 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1079 mos7840_port
->shadowLCR
= Data
;
1081 /* clearing Bulkin and Bulkout Fifo */
1083 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
, &Data
);
1086 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
1088 Data
= Data
& ~0x0c;
1089 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
1090 /* Finally enable all interrupts */
1092 status
= mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
1094 /* clearing rx_disable */
1096 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1098 Data
= Data
& ~0x20;
1099 status
= mos7840_set_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1104 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1107 status
= mos7840_set_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1110 /* Check to see if we've set up our endpoint info yet *
1111 * (can't set it up in mos7840_startup as the structures *
1112 * were not set up at that time.) */
1113 if (port0
->open_ports
== 1) {
1114 if (serial
->port
[0]->interrupt_in_buffer
== NULL
) {
1115 /* set up interrupt urb */
1116 usb_fill_int_urb(serial
->port
[0]->interrupt_in_urb
,
1118 usb_rcvintpipe(serial
->dev
,
1119 serial
->port
[0]->interrupt_in_endpointAddress
),
1120 serial
->port
[0]->interrupt_in_buffer
,
1121 serial
->port
[0]->interrupt_in_urb
->
1122 transfer_buffer_length
,
1123 mos7840_interrupt_callback
,
1125 serial
->port
[0]->interrupt_in_urb
->interval
);
1127 /* start interrupt read for mos7840 *
1128 * will continue as long as mos7840 is connected */
1131 usb_submit_urb(serial
->port
[0]->interrupt_in_urb
,
1134 dev_err(&port
->dev
, "%s - Error %d submitting "
1135 "interrupt urb\n", __func__
, response
);
1142 /* see if we've set up our endpoint info yet *
1143 * (can't set it up in mos7840_startup as the *
1144 * structures were not set up at that time.) */
1146 dbg("port number is %d", port
->number
);
1147 dbg("serial number is %d", port
->serial
->minor
);
1148 dbg("Bulkin endpoint is %d", port
->bulk_in_endpointAddress
);
1149 dbg("BulkOut endpoint is %d", port
->bulk_out_endpointAddress
);
1150 dbg("Interrupt endpoint is %d", port
->interrupt_in_endpointAddress
);
1151 dbg("port's number in the device is %d", mos7840_port
->port_num
);
1152 mos7840_port
->read_urb
= port
->read_urb
;
1154 /* set up our bulk in urb */
1155 if ((serial
->num_ports
== 2)
1156 && ((((__u16
)port
->number
-
1157 (__u16
)(port
->serial
->minor
)) % 2) != 0)) {
1158 usb_fill_bulk_urb(mos7840_port
->read_urb
,
1160 usb_rcvbulkpipe(serial
->dev
,
1161 (port
->bulk_in_endpointAddress
) + 2),
1162 port
->bulk_in_buffer
,
1163 mos7840_port
->read_urb
->transfer_buffer_length
,
1164 mos7840_bulk_in_callback
, mos7840_port
);
1166 usb_fill_bulk_urb(mos7840_port
->read_urb
,
1168 usb_rcvbulkpipe(serial
->dev
,
1169 port
->bulk_in_endpointAddress
),
1170 port
->bulk_in_buffer
,
1171 mos7840_port
->read_urb
->transfer_buffer_length
,
1172 mos7840_bulk_in_callback
, mos7840_port
);
1175 dbg("mos7840_open: bulkin endpoint is %d",
1176 port
->bulk_in_endpointAddress
);
1177 mos7840_port
->read_urb_busy
= true;
1178 response
= usb_submit_urb(mos7840_port
->read_urb
, GFP_KERNEL
);
1180 dev_err(&port
->dev
, "%s - Error %d submitting control urb\n",
1181 __func__
, response
);
1182 mos7840_port
->read_urb_busy
= false;
1185 /* initialize our wait queues */
1186 init_waitqueue_head(&mos7840_port
->wait_chase
);
1187 init_waitqueue_head(&mos7840_port
->delta_msr_wait
);
1189 /* initialize our icount structure */
1190 memset(&(mos7840_port
->icount
), 0x00, sizeof(mos7840_port
->icount
));
1192 /* initialize our port settings */
1193 /* Must set to enable ints! */
1194 mos7840_port
->shadowMCR
= MCR_MASTER_IE
;
1195 /* send a open port command */
1196 mos7840_port
->open
= 1;
1197 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1198 mos7840_port
->icount
.tx
= 0;
1199 mos7840_port
->icount
.rx
= 0;
1201 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p",
1202 serial
, mos7840_port
, port
);
1207 /*****************************************************************************
1208 * mos7840_chars_in_buffer
1209 * this function is called by the tty driver when it wants to know how many
1210 * bytes of data we currently have outstanding in the port (data that has
1211 * been written, but hasn't made it out the port yet)
1212 * If successful, we return the number of bytes left to be written in the
1214 * Otherwise we return zero.
1215 *****************************************************************************/
1217 static int mos7840_chars_in_buffer(struct tty_struct
*tty
)
1219 struct usb_serial_port
*port
= tty
->driver_data
;
1222 unsigned long flags
;
1223 struct moschip_port
*mos7840_port
;
1225 if (mos7840_port_paranoia_check(port
, __func__
)) {
1226 dbg("%s", "Invalid port");
1230 mos7840_port
= mos7840_get_port_private(port
);
1231 if (mos7840_port
== NULL
)
1234 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1235 for (i
= 0; i
< NUM_URBS
; ++i
)
1236 if (mos7840_port
->busy
[i
])
1237 chars
+= URB_TRANSFER_BUFFER_SIZE
;
1238 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1239 dbg("%s - returns %d", __func__
, chars
);
1244 /*****************************************************************************
1246 * this function is called by the tty driver when a port is closed
1247 *****************************************************************************/
1249 static void mos7840_close(struct usb_serial_port
*port
)
1251 struct usb_serial
*serial
;
1252 struct moschip_port
*mos7840_port
;
1253 struct moschip_port
*port0
;
1257 if (mos7840_port_paranoia_check(port
, __func__
)) {
1258 dbg("%s", "Port Paranoia failed");
1262 serial
= mos7840_get_usb_serial(port
, __func__
);
1264 dbg("%s", "Serial Paranoia failed");
1268 mos7840_port
= mos7840_get_port_private(port
);
1269 port0
= mos7840_get_port_private(serial
->port
[0]);
1271 if (mos7840_port
== NULL
|| port0
== NULL
)
1274 for (j
= 0; j
< NUM_URBS
; ++j
)
1275 usb_kill_urb(mos7840_port
->write_urb_pool
[j
]);
1277 /* Freeing Write URBs */
1278 for (j
= 0; j
< NUM_URBS
; ++j
) {
1279 if (mos7840_port
->write_urb_pool
[j
]) {
1280 if (mos7840_port
->write_urb_pool
[j
]->transfer_buffer
)
1281 kfree(mos7840_port
->write_urb_pool
[j
]->
1284 usb_free_urb(mos7840_port
->write_urb_pool
[j
]);
1288 /* While closing port, shutdown all bulk read, write *
1289 * and interrupt read if they exists */
1291 if (mos7840_port
->write_urb
) {
1292 dbg("%s", "Shutdown bulk write");
1293 usb_kill_urb(mos7840_port
->write_urb
);
1295 if (mos7840_port
->read_urb
) {
1296 dbg("%s", "Shutdown bulk read");
1297 usb_kill_urb(mos7840_port
->read_urb
);
1298 mos7840_port
->read_urb_busy
= false;
1300 if ((&mos7840_port
->control_urb
)) {
1301 dbg("%s", "Shutdown control read");
1302 /*/ usb_kill_urb (mos7840_port->control_urb); */
1305 /* if(mos7840_port->ctrl_buf != NULL) */
1306 /* kfree(mos7840_port->ctrl_buf); */
1307 port0
->open_ports
--;
1308 dbg("mos7840_num_open_ports in close%d:in port%d",
1309 port0
->open_ports
, port
->number
);
1310 if (port0
->open_ports
== 0) {
1311 if (serial
->port
[0]->interrupt_in_urb
) {
1312 dbg("%s", "Shutdown interrupt_in_urb");
1313 usb_kill_urb(serial
->port
[0]->interrupt_in_urb
);
1317 if (mos7840_port
->write_urb
) {
1318 /* if this urb had a transfer buffer already (old tx) free it */
1319 if (mos7840_port
->write_urb
->transfer_buffer
!= NULL
)
1320 kfree(mos7840_port
->write_urb
->transfer_buffer
);
1321 usb_free_urb(mos7840_port
->write_urb
);
1325 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
1328 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
1330 mos7840_port
->open
= 0;
1333 /************************************************************************
1335 * mos7840_block_until_chase_response
1337 * This function will block the close until one of the following:
1338 * 1. Response to our Chase comes from mos7840
1339 * 2. A timeout of 10 seconds without activity has expired
1340 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1342 ************************************************************************/
1344 static void mos7840_block_until_chase_response(struct tty_struct
*tty
,
1345 struct moschip_port
*mos7840_port
)
1347 int timeout
= 1 * HZ
;
1352 count
= mos7840_chars_in_buffer(tty
);
1354 /* Check for Buffer status */
1358 /* Block the thread for a while */
1359 interruptible_sleep_on_timeout(&mos7840_port
->wait_chase
,
1361 /* No activity.. count down section */
1364 dbg("%s - TIMEOUT", __func__
);
1367 /* Reset timeout value back to seconds */
1374 /*****************************************************************************
1376 * this function sends a break to the port
1377 *****************************************************************************/
1378 static void mos7840_break(struct tty_struct
*tty
, int break_state
)
1380 struct usb_serial_port
*port
= tty
->driver_data
;
1382 struct usb_serial
*serial
;
1383 struct moschip_port
*mos7840_port
;
1385 if (mos7840_port_paranoia_check(port
, __func__
)) {
1386 dbg("%s", "Port Paranoia failed");
1390 serial
= mos7840_get_usb_serial(port
, __func__
);
1392 dbg("%s", "Serial Paranoia failed");
1396 mos7840_port
= mos7840_get_port_private(port
);
1398 if (mos7840_port
== NULL
)
1402 /* flush and block until tx is empty */
1403 mos7840_block_until_chase_response(tty
, mos7840_port
);
1405 if (break_state
== -1)
1406 data
= mos7840_port
->shadowLCR
| LCR_SET_BREAK
;
1408 data
= mos7840_port
->shadowLCR
& ~LCR_SET_BREAK
;
1410 /* FIXME: no locking on shadowLCR anywhere in driver */
1411 mos7840_port
->shadowLCR
= data
;
1412 dbg("mcs7840_break mos7840_port->shadowLCR is %x",
1413 mos7840_port
->shadowLCR
);
1414 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
,
1415 mos7840_port
->shadowLCR
);
1418 /*****************************************************************************
1419 * mos7840_write_room
1420 * this function is called by the tty driver when it wants to know how many
1421 * bytes of data we can accept for a specific port.
1422 * If successful, we return the amount of room that we have for this port
1423 * Otherwise we return a negative error number.
1424 *****************************************************************************/
1426 static int mos7840_write_room(struct tty_struct
*tty
)
1428 struct usb_serial_port
*port
= tty
->driver_data
;
1431 unsigned long flags
;
1432 struct moschip_port
*mos7840_port
;
1434 if (mos7840_port_paranoia_check(port
, __func__
)) {
1435 dbg("%s", "Invalid port");
1436 dbg("%s", " mos7840_write_room:leaving ...........");
1440 mos7840_port
= mos7840_get_port_private(port
);
1441 if (mos7840_port
== NULL
) {
1442 dbg("%s", "mos7840_break:leaving ...........");
1446 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1447 for (i
= 0; i
< NUM_URBS
; ++i
) {
1448 if (!mos7840_port
->busy
[i
])
1449 room
+= URB_TRANSFER_BUFFER_SIZE
;
1451 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1453 room
= (room
== 0) ? 0 : room
- URB_TRANSFER_BUFFER_SIZE
+ 1;
1454 dbg("%s - returns %d", __func__
, room
);
1459 /*****************************************************************************
1461 * this function is called by the tty driver when data should be written to
1463 * If successful, we return the number of bytes written, otherwise we
1464 * return a negative error number.
1465 *****************************************************************************/
1467 static int mos7840_write(struct tty_struct
*tty
, struct usb_serial_port
*port
,
1468 const unsigned char *data
, int count
)
1474 unsigned long flags
;
1476 struct moschip_port
*mos7840_port
;
1477 struct usb_serial
*serial
;
1480 const unsigned char *current_position
= data
;
1481 unsigned char *data1
;
1485 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
1486 mos7840_port
->shadowLCR
= Data
;
1487 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data
);
1488 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1489 mos7840_port
->shadowLCR
);
1492 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1493 /* mos7840_port->shadowLCR=Data;//Need to add later */
1495 Data
|= SERIAL_LCR_DLAB
; /* data latch enable in LCR 0x80 */
1496 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1499 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1501 status
= mos7840_get_uart_reg(port
, DIVISOR_LATCH_LSB
, &Data
);
1502 dbg("mos7840_write:DLL value is %x", Data
);
1505 status
= mos7840_get_uart_reg(port
, DIVISOR_LATCH_MSB
, &Data
);
1506 dbg("mos7840_write:DLM value is %x", Data
);
1508 Data
= Data
& ~SERIAL_LCR_DLAB
;
1509 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1510 mos7840_port
->shadowLCR
);
1511 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1514 if (mos7840_port_paranoia_check(port
, __func__
)) {
1515 dbg("%s", "Port Paranoia failed");
1519 serial
= port
->serial
;
1520 if (mos7840_serial_paranoia_check(serial
, __func__
)) {
1521 dbg("%s", "Serial Paranoia failed");
1525 mos7840_port
= mos7840_get_port_private(port
);
1526 if (mos7840_port
== NULL
) {
1527 dbg("%s", "mos7840_port is NULL");
1531 /* try to find a free urb in the list */
1534 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1535 for (i
= 0; i
< NUM_URBS
; ++i
) {
1536 if (!mos7840_port
->busy
[i
]) {
1537 mos7840_port
->busy
[i
] = 1;
1538 urb
= mos7840_port
->write_urb_pool
[i
];
1543 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1546 dbg("%s - no more free urbs", __func__
);
1550 if (urb
->transfer_buffer
== NULL
) {
1551 urb
->transfer_buffer
=
1552 kmalloc(URB_TRANSFER_BUFFER_SIZE
, GFP_KERNEL
);
1554 if (urb
->transfer_buffer
== NULL
) {
1555 dev_err_console(port
, "%s no more kernel memory...\n",
1560 transfer_size
= min(count
, URB_TRANSFER_BUFFER_SIZE
);
1562 memcpy(urb
->transfer_buffer
, current_position
, transfer_size
);
1564 /* fill urb with data and submit */
1565 if ((serial
->num_ports
== 2)
1566 && ((((__u16
)port
->number
-
1567 (__u16
)(port
->serial
->minor
)) % 2) != 0)) {
1568 usb_fill_bulk_urb(urb
,
1570 usb_sndbulkpipe(serial
->dev
,
1571 (port
->bulk_out_endpointAddress
) + 2),
1572 urb
->transfer_buffer
,
1574 mos7840_bulk_out_data_callback
, mos7840_port
);
1576 usb_fill_bulk_urb(urb
,
1578 usb_sndbulkpipe(serial
->dev
,
1579 port
->bulk_out_endpointAddress
),
1580 urb
->transfer_buffer
,
1582 mos7840_bulk_out_data_callback
, mos7840_port
);
1585 data1
= urb
->transfer_buffer
;
1586 dbg("bulkout endpoint is %d", port
->bulk_out_endpointAddress
);
1589 if (mos7840_port
->has_led
&& !mos7840_port
->led_flag
) {
1590 mos7840_port
->led_flag
= true;
1591 mos7840_set_led_sync(port
, MODEM_CONTROL_REGISTER
, 0x0301);
1592 mod_timer(&mos7840_port
->led_timer1
,
1593 jiffies
+ msecs_to_jiffies(LED_ON_MS
));
1596 /* send it down the pipe */
1597 status
= usb_submit_urb(urb
, GFP_ATOMIC
);
1600 mos7840_port
->busy
[i
] = 0;
1601 dev_err_console(port
, "%s - usb_submit_urb(write bulk) failed "
1602 "with status = %d\n", __func__
, status
);
1603 bytes_sent
= status
;
1606 bytes_sent
= transfer_size
;
1607 mos7840_port
->icount
.tx
+= transfer_size
;
1609 dbg("mos7840_port->icount.tx is %d:", mos7840_port
->icount
.tx
);
1615 /*****************************************************************************
1617 * this function is called by the tty driver when it wants to stop the data
1618 * being read from the port.
1619 *****************************************************************************/
1621 static void mos7840_throttle(struct tty_struct
*tty
)
1623 struct usb_serial_port
*port
= tty
->driver_data
;
1624 struct moschip_port
*mos7840_port
;
1627 if (mos7840_port_paranoia_check(port
, __func__
)) {
1628 dbg("%s", "Invalid port");
1632 dbg("- port %d", port
->number
);
1634 mos7840_port
= mos7840_get_port_private(port
);
1636 if (mos7840_port
== NULL
)
1639 if (!mos7840_port
->open
) {
1640 dbg("%s", "port not opened");
1644 /* if we are implementing XON/XOFF, send the stop character */
1646 unsigned char stop_char
= STOP_CHAR(tty
);
1647 status
= mos7840_write(tty
, port
, &stop_char
, 1);
1651 /* if we are implementing RTS/CTS, toggle that line */
1652 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1653 mos7840_port
->shadowMCR
&= ~MCR_RTS
;
1654 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1655 mos7840_port
->shadowMCR
);
1661 /*****************************************************************************
1662 * mos7840_unthrottle
1663 * this function is called by the tty driver when it wants to resume
1664 * the data being read from the port (called after mos7840_throttle is
1666 *****************************************************************************/
1667 static void mos7840_unthrottle(struct tty_struct
*tty
)
1669 struct usb_serial_port
*port
= tty
->driver_data
;
1671 struct moschip_port
*mos7840_port
= mos7840_get_port_private(port
);
1673 if (mos7840_port_paranoia_check(port
, __func__
)) {
1674 dbg("%s", "Invalid port");
1678 if (mos7840_port
== NULL
)
1681 if (!mos7840_port
->open
) {
1682 dbg("%s - port not opened", __func__
);
1686 /* if we are implementing XON/XOFF, send the start character */
1688 unsigned char start_char
= START_CHAR(tty
);
1689 status
= mos7840_write(tty
, port
, &start_char
, 1);
1694 /* if we are implementing RTS/CTS, toggle that line */
1695 if (tty
->termios
->c_cflag
& CRTSCTS
) {
1696 mos7840_port
->shadowMCR
|= MCR_RTS
;
1697 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1698 mos7840_port
->shadowMCR
);
1704 static int mos7840_tiocmget(struct tty_struct
*tty
)
1706 struct usb_serial_port
*port
= tty
->driver_data
;
1707 struct moschip_port
*mos7840_port
;
1708 unsigned int result
;
1712 mos7840_port
= mos7840_get_port_private(port
);
1714 if (mos7840_port
== NULL
)
1717 status
= mos7840_get_uart_reg(port
, MODEM_STATUS_REGISTER
, &msr
);
1718 status
= mos7840_get_uart_reg(port
, MODEM_CONTROL_REGISTER
, &mcr
);
1719 result
= ((mcr
& MCR_DTR
) ? TIOCM_DTR
: 0)
1720 | ((mcr
& MCR_RTS
) ? TIOCM_RTS
: 0)
1721 | ((mcr
& MCR_LOOPBACK
) ? TIOCM_LOOP
: 0)
1722 | ((msr
& MOS7840_MSR_CTS
) ? TIOCM_CTS
: 0)
1723 | ((msr
& MOS7840_MSR_CD
) ? TIOCM_CAR
: 0)
1724 | ((msr
& MOS7840_MSR_RI
) ? TIOCM_RI
: 0)
1725 | ((msr
& MOS7840_MSR_DSR
) ? TIOCM_DSR
: 0);
1727 dbg("%s - 0x%04X", __func__
, result
);
1732 static int mos7840_tiocmset(struct tty_struct
*tty
,
1733 unsigned int set
, unsigned int clear
)
1735 struct usb_serial_port
*port
= tty
->driver_data
;
1736 struct moschip_port
*mos7840_port
;
1740 mos7840_port
= mos7840_get_port_private(port
);
1742 if (mos7840_port
== NULL
)
1745 /* FIXME: What locks the port registers ? */
1746 mcr
= mos7840_port
->shadowMCR
;
1747 if (clear
& TIOCM_RTS
)
1749 if (clear
& TIOCM_DTR
)
1751 if (clear
& TIOCM_LOOP
)
1752 mcr
&= ~MCR_LOOPBACK
;
1754 if (set
& TIOCM_RTS
)
1756 if (set
& TIOCM_DTR
)
1758 if (set
& TIOCM_LOOP
)
1759 mcr
|= MCR_LOOPBACK
;
1761 mos7840_port
->shadowMCR
= mcr
;
1763 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, mcr
);
1765 dbg("setting MODEM_CONTROL_REGISTER Failed");
1772 /*****************************************************************************
1773 * mos7840_calc_baud_rate_divisor
1774 * this function calculates the proper baud rate divisor for the specified
1776 *****************************************************************************/
1777 static int mos7840_calc_baud_rate_divisor(int baudRate
, int *divisor
,
1780 dbg("%s - %d", __func__
, baudRate
);
1782 if (baudRate
<= 115200) {
1783 *divisor
= 115200 / baudRate
;
1786 if ((baudRate
> 115200) && (baudRate
<= 230400)) {
1787 *divisor
= 230400 / baudRate
;
1788 *clk_sel_val
= 0x10;
1789 } else if ((baudRate
> 230400) && (baudRate
<= 403200)) {
1790 *divisor
= 403200 / baudRate
;
1791 *clk_sel_val
= 0x20;
1792 } else if ((baudRate
> 403200) && (baudRate
<= 460800)) {
1793 *divisor
= 460800 / baudRate
;
1794 *clk_sel_val
= 0x30;
1795 } else if ((baudRate
> 460800) && (baudRate
<= 806400)) {
1796 *divisor
= 806400 / baudRate
;
1797 *clk_sel_val
= 0x40;
1798 } else if ((baudRate
> 806400) && (baudRate
<= 921600)) {
1799 *divisor
= 921600 / baudRate
;
1800 *clk_sel_val
= 0x50;
1801 } else if ((baudRate
> 921600) && (baudRate
<= 1572864)) {
1802 *divisor
= 1572864 / baudRate
;
1803 *clk_sel_val
= 0x60;
1804 } else if ((baudRate
> 1572864) && (baudRate
<= 3145728)) {
1805 *divisor
= 3145728 / baudRate
;
1806 *clk_sel_val
= 0x70;
1812 for (i
= 0; i
< ARRAY_SIZE(mos7840_divisor_table
); i
++) {
1813 if (mos7840_divisor_table
[i
].BaudRate
== baudrate
) {
1814 *divisor
= mos7840_divisor_table
[i
].Divisor
;
1819 /* After trying for all the standard baud rates *
1820 * Try calculating the divisor for this baud rate */
1822 if (baudrate
> 75 && baudrate
< 230400) {
1823 /* get the divisor */
1824 custom
= (__u16
) (230400L / baudrate
);
1826 /* Check for round off */
1827 round1
= (__u16
) (2304000L / baudrate
);
1828 round
= (__u16
) (round1
- (custom
* 10));
1833 dbg(" Baud %d = %d", baudrate
, custom
);
1837 dbg("%s", " Baud calculation Failed...");
1842 /*****************************************************************************
1843 * mos7840_send_cmd_write_baud_rate
1844 * this function sends the proper command to change the baud rate of the
1846 *****************************************************************************/
1848 static int mos7840_send_cmd_write_baud_rate(struct moschip_port
*mos7840_port
,
1854 unsigned char number
;
1856 struct usb_serial_port
*port
;
1858 if (mos7840_port
== NULL
)
1861 port
= (struct usb_serial_port
*)mos7840_port
->port
;
1862 if (mos7840_port_paranoia_check(port
, __func__
)) {
1863 dbg("%s", "Invalid port");
1867 if (mos7840_serial_paranoia_check(port
->serial
, __func__
)) {
1868 dbg("%s", "Invalid Serial");
1872 number
= mos7840_port
->port
->number
- mos7840_port
->port
->serial
->minor
;
1874 dbg("%s - port = %d, baud = %d", __func__
,
1875 mos7840_port
->port
->number
, baudRate
);
1876 /* reset clk_uart_sel in spregOffset */
1877 if (baudRate
> 115200) {
1878 #ifdef HW_flow_control
1879 /* NOTE: need to see the pther register to modify */
1880 /* setting h/w flow control bit to 1 */
1882 mos7840_port
->shadowMCR
= Data
;
1883 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1886 dbg("Writing spreg failed in set_serial_baud");
1892 #ifdef HW_flow_control
1893 /* setting h/w flow control bit to 0 */
1895 mos7840_port
->shadowMCR
= Data
;
1896 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1899 dbg("Writing spreg failed in set_serial_baud");
1906 if (1) { /* baudRate <= 115200) */
1909 status
= mos7840_calc_baud_rate_divisor(baudRate
, &divisor
,
1911 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
,
1914 dbg("reading spreg failed in set_serial_baud");
1917 Data
= (Data
& 0x8f) | clk_sel_val
;
1918 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
,
1921 dbg("Writing spreg failed in set_serial_baud");
1924 /* Calculate the Divisor */
1927 dev_err(&port
->dev
, "%s - bad baud rate\n", __func__
);
1930 /* Enable access to divisor latch */
1931 Data
= mos7840_port
->shadowLCR
| SERIAL_LCR_DLAB
;
1932 mos7840_port
->shadowLCR
= Data
;
1933 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1935 /* Write the divisor */
1936 Data
= (unsigned char)(divisor
& 0xff);
1937 dbg("set_serial_baud Value to write DLL is %x", Data
);
1938 mos7840_set_uart_reg(port
, DIVISOR_LATCH_LSB
, Data
);
1940 Data
= (unsigned char)((divisor
& 0xff00) >> 8);
1941 dbg("set_serial_baud Value to write DLM is %x", Data
);
1942 mos7840_set_uart_reg(port
, DIVISOR_LATCH_MSB
, Data
);
1944 /* Disable access to divisor latch */
1945 Data
= mos7840_port
->shadowLCR
& ~SERIAL_LCR_DLAB
;
1946 mos7840_port
->shadowLCR
= Data
;
1947 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1953 /*****************************************************************************
1954 * mos7840_change_port_settings
1955 * This routine is called to set the UART on the device to match
1956 * the specified new settings.
1957 *****************************************************************************/
1959 static void mos7840_change_port_settings(struct tty_struct
*tty
,
1960 struct moschip_port
*mos7840_port
, struct ktermios
*old_termios
)
1970 struct usb_serial_port
*port
;
1971 struct usb_serial
*serial
;
1973 if (mos7840_port
== NULL
)
1976 port
= (struct usb_serial_port
*)mos7840_port
->port
;
1978 if (mos7840_port_paranoia_check(port
, __func__
)) {
1979 dbg("%s", "Invalid port");
1983 if (mos7840_serial_paranoia_check(port
->serial
, __func__
)) {
1984 dbg("%s", "Invalid Serial");
1988 serial
= port
->serial
;
1990 dbg("%s - port %d", __func__
, mos7840_port
->port
->number
);
1992 if (!mos7840_port
->open
) {
1993 dbg("%s - port not opened", __func__
);
1999 lParity
= LCR_PAR_NONE
;
2001 cflag
= tty
->termios
->c_cflag
;
2002 iflag
= tty
->termios
->c_iflag
;
2004 /* Change the number of bits */
2005 if (cflag
& CSIZE
) {
2006 switch (cflag
& CSIZE
) {
2024 /* Change the Parity bit */
2025 if (cflag
& PARENB
) {
2026 if (cflag
& PARODD
) {
2027 lParity
= LCR_PAR_ODD
;
2028 dbg("%s - parity = odd", __func__
);
2030 lParity
= LCR_PAR_EVEN
;
2031 dbg("%s - parity = even", __func__
);
2035 dbg("%s - parity = none", __func__
);
2039 lParity
= lParity
| 0x20;
2041 /* Change the Stop bit */
2042 if (cflag
& CSTOPB
) {
2044 dbg("%s - stop bits = 2", __func__
);
2047 dbg("%s - stop bits = 1", __func__
);
2050 /* Update the LCR with the correct value */
2051 mos7840_port
->shadowLCR
&=
2052 ~(LCR_BITS_MASK
| LCR_STOP_MASK
| LCR_PAR_MASK
);
2053 mos7840_port
->shadowLCR
|= (lData
| lParity
| lStop
);
2055 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x",
2056 mos7840_port
->shadowLCR
);
2057 /* Disable Interrupts */
2059 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
2062 mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
2065 mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
2067 /* Send the updated LCR value to the mos7840 */
2068 Data
= mos7840_port
->shadowLCR
;
2070 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
2073 mos7840_port
->shadowMCR
= Data
;
2074 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2076 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2078 /* set up the MCR register and send it to the mos7840 */
2080 mos7840_port
->shadowMCR
= MCR_MASTER_IE
;
2082 mos7840_port
->shadowMCR
|= (MCR_DTR
| MCR_RTS
);
2084 if (cflag
& CRTSCTS
)
2085 mos7840_port
->shadowMCR
|= (MCR_XON_ANY
);
2087 mos7840_port
->shadowMCR
&= ~(MCR_XON_ANY
);
2089 Data
= mos7840_port
->shadowMCR
;
2090 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
2092 /* Determine divisor based on baud rate */
2093 baud
= tty_get_baud_rate(tty
);
2096 /* pick a default, any default... */
2097 dbg("%s", "Picked default baud...");
2101 dbg("%s - baud rate = %d", __func__
, baud
);
2102 status
= mos7840_send_cmd_write_baud_rate(mos7840_port
, baud
);
2104 /* Enable Interrupts */
2106 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
2108 if (mos7840_port
->read_urb_busy
== false) {
2109 mos7840_port
->read_urb_busy
= true;
2110 status
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
2112 dbg("usb_submit_urb(read bulk) failed, status = %d",
2114 mos7840_port
->read_urb_busy
= false;
2117 wake_up(&mos7840_port
->delta_msr_wait
);
2118 mos7840_port
->delta_msr_cond
= 1;
2119 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x",
2120 mos7840_port
->shadowLCR
);
2123 /*****************************************************************************
2124 * mos7840_set_termios
2125 * this function is called by the tty driver when it wants to change
2126 * the termios structure
2127 *****************************************************************************/
2129 static void mos7840_set_termios(struct tty_struct
*tty
,
2130 struct usb_serial_port
*port
,
2131 struct ktermios
*old_termios
)
2135 struct usb_serial
*serial
;
2136 struct moschip_port
*mos7840_port
;
2138 if (mos7840_port_paranoia_check(port
, __func__
)) {
2139 dbg("%s", "Invalid port");
2143 serial
= port
->serial
;
2145 if (mos7840_serial_paranoia_check(serial
, __func__
)) {
2146 dbg("%s", "Invalid Serial");
2150 mos7840_port
= mos7840_get_port_private(port
);
2152 if (mos7840_port
== NULL
)
2155 if (!mos7840_port
->open
) {
2156 dbg("%s - port not opened", __func__
);
2160 dbg("%s", "setting termios - ");
2162 cflag
= tty
->termios
->c_cflag
;
2164 dbg("%s - clfag %08x iflag %08x", __func__
,
2165 tty
->termios
->c_cflag
, RELEVANT_IFLAG(tty
->termios
->c_iflag
));
2166 dbg("%s - old clfag %08x old iflag %08x", __func__
,
2167 old_termios
->c_cflag
, RELEVANT_IFLAG(old_termios
->c_iflag
));
2168 dbg("%s - port %d", __func__
, port
->number
);
2170 /* change the port settings to the new ones specified */
2172 mos7840_change_port_settings(tty
, mos7840_port
, old_termios
);
2174 if (!mos7840_port
->read_urb
) {
2175 dbg("%s", "URB KILLED !!!!!");
2179 if (mos7840_port
->read_urb_busy
== false) {
2180 mos7840_port
->read_urb_busy
= true;
2181 status
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
2183 dbg("usb_submit_urb(read bulk) failed, status = %d",
2185 mos7840_port
->read_urb_busy
= false;
2190 /*****************************************************************************
2191 * mos7840_get_lsr_info - get line status register info
2193 * Purpose: Let user call ioctl() to get info when the UART physically
2194 * is emptied. On bus types like RS485, the transmitter must
2195 * release the bus after transmitting. This must be done when
2196 * the transmit shift register is empty, not be done when the
2197 * transmit holding register is empty. This functionality
2198 * allows an RS485 driver to be written in user space.
2199 *****************************************************************************/
2201 static int mos7840_get_lsr_info(struct tty_struct
*tty
,
2202 unsigned int __user
*value
)
2205 unsigned int result
= 0;
2207 count
= mos7840_chars_in_buffer(tty
);
2209 dbg("%s -- Empty", __func__
);
2210 result
= TIOCSER_TEMT
;
2213 if (copy_to_user(value
, &result
, sizeof(int)))
2218 /*****************************************************************************
2219 * mos7840_get_serial_info
2220 * function to get information about serial port
2221 *****************************************************************************/
2223 static int mos7840_get_serial_info(struct moschip_port
*mos7840_port
,
2224 struct serial_struct __user
*retinfo
)
2226 struct serial_struct tmp
;
2228 if (mos7840_port
== NULL
)
2234 memset(&tmp
, 0, sizeof(tmp
));
2236 tmp
.type
= PORT_16550A
;
2237 tmp
.line
= mos7840_port
->port
->serial
->minor
;
2238 tmp
.port
= mos7840_port
->port
->number
;
2240 tmp
.flags
= ASYNC_SKIP_TEST
| ASYNC_AUTO_IRQ
;
2241 tmp
.xmit_fifo_size
= NUM_URBS
* URB_TRANSFER_BUFFER_SIZE
;
2242 tmp
.baud_base
= 9600;
2243 tmp
.close_delay
= 5 * HZ
;
2244 tmp
.closing_wait
= 30 * HZ
;
2246 if (copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)))
2251 static int mos7840_get_icount(struct tty_struct
*tty
,
2252 struct serial_icounter_struct
*icount
)
2254 struct usb_serial_port
*port
= tty
->driver_data
;
2255 struct moschip_port
*mos7840_port
;
2256 struct async_icount cnow
;
2258 mos7840_port
= mos7840_get_port_private(port
);
2259 cnow
= mos7840_port
->icount
;
2262 icount
->cts
= cnow
.cts
;
2263 icount
->dsr
= cnow
.dsr
;
2264 icount
->rng
= cnow
.rng
;
2265 icount
->dcd
= cnow
.dcd
;
2266 icount
->rx
= cnow
.rx
;
2267 icount
->tx
= cnow
.tx
;
2268 icount
->frame
= cnow
.frame
;
2269 icount
->overrun
= cnow
.overrun
;
2270 icount
->parity
= cnow
.parity
;
2271 icount
->brk
= cnow
.brk
;
2272 icount
->buf_overrun
= cnow
.buf_overrun
;
2274 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__
,
2275 port
->number
, icount
->rx
, icount
->tx
);
2279 /*****************************************************************************
2281 * this function handles any ioctl calls to the driver
2282 *****************************************************************************/
2284 static int mos7840_ioctl(struct tty_struct
*tty
,
2285 unsigned int cmd
, unsigned long arg
)
2287 struct usb_serial_port
*port
= tty
->driver_data
;
2288 void __user
*argp
= (void __user
*)arg
;
2289 struct moschip_port
*mos7840_port
;
2291 struct async_icount cnow
;
2292 struct async_icount cprev
;
2294 if (mos7840_port_paranoia_check(port
, __func__
)) {
2295 dbg("%s", "Invalid port");
2299 mos7840_port
= mos7840_get_port_private(port
);
2301 if (mos7840_port
== NULL
)
2304 dbg("%s - port %d, cmd = 0x%x", __func__
, port
->number
, cmd
);
2307 /* return number of bytes available */
2310 dbg("%s (%d) TIOCSERGETLSR", __func__
, port
->number
);
2311 return mos7840_get_lsr_info(tty
, argp
);
2314 dbg("%s (%d) TIOCGSERIAL", __func__
, port
->number
);
2315 return mos7840_get_serial_info(mos7840_port
, argp
);
2318 dbg("%s (%d) TIOCSSERIAL", __func__
, port
->number
);
2322 dbg("%s (%d) TIOCMIWAIT", __func__
, port
->number
);
2323 cprev
= mos7840_port
->icount
;
2325 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2326 mos7840_port
->delta_msr_cond
= 0;
2327 wait_event_interruptible(mos7840_port
->delta_msr_wait
,
2329 delta_msr_cond
== 1));
2331 /* see if a signal did it */
2332 if (signal_pending(current
))
2333 return -ERESTARTSYS
;
2334 cnow
= mos7840_port
->icount
;
2336 if (cnow
.rng
== cprev
.rng
&& cnow
.dsr
== cprev
.dsr
&&
2337 cnow
.dcd
== cprev
.dcd
&& cnow
.cts
== cprev
.cts
)
2338 return -EIO
; /* no change => error */
2339 if (((arg
& TIOCM_RNG
) && (cnow
.rng
!= cprev
.rng
)) ||
2340 ((arg
& TIOCM_DSR
) && (cnow
.dsr
!= cprev
.dsr
)) ||
2341 ((arg
& TIOCM_CD
) && (cnow
.dcd
!= cprev
.dcd
)) ||
2342 ((arg
& TIOCM_CTS
) && (cnow
.cts
!= cprev
.cts
))) {
2353 return -ENOIOCTLCMD
;
2356 static int mos7810_check(struct usb_serial
*serial
)
2358 int i
, pass_count
= 0;
2359 __u16 data
= 0, mcr_data
= 0;
2360 __u16 test_pattern
= 0x55AA;
2362 /* Store MCR setting */
2363 usb_control_msg(serial
->dev
, usb_rcvctrlpipe(serial
->dev
, 0),
2364 MCS_RDREQ
, MCS_RD_RTYPE
, 0x0300, MODEM_CONTROL_REGISTER
,
2365 &mcr_data
, VENDOR_READ_LENGTH
, MOS_WDR_TIMEOUT
);
2367 for (i
= 0; i
< 16; i
++) {
2368 /* Send the 1-bit test pattern out to MCS7810 test pin */
2369 usb_control_msg(serial
->dev
, usb_sndctrlpipe(serial
->dev
, 0),
2370 MCS_WRREQ
, MCS_WR_RTYPE
,
2371 (0x0300 | (((test_pattern
>> i
) & 0x0001) << 1)),
2372 MODEM_CONTROL_REGISTER
, NULL
, 0, MOS_WDR_TIMEOUT
);
2374 /* Read the test pattern back */
2375 usb_control_msg(serial
->dev
, usb_rcvctrlpipe(serial
->dev
, 0),
2376 MCS_RDREQ
, MCS_RD_RTYPE
, 0, GPIO_REGISTER
, &data
,
2377 VENDOR_READ_LENGTH
, MOS_WDR_TIMEOUT
);
2379 /* If this is a MCS7810 device, both test patterns must match */
2380 if (((test_pattern
>> i
) ^ (~data
>> 1)) & 0x0001)
2386 /* Restore MCR setting */
2387 usb_control_msg(serial
->dev
, usb_sndctrlpipe(serial
->dev
, 0), MCS_WRREQ
,
2388 MCS_WR_RTYPE
, 0x0300 | mcr_data
, MODEM_CONTROL_REGISTER
, NULL
,
2389 0, MOS_WDR_TIMEOUT
);
2391 if (pass_count
== 16)
2397 static int mos7840_calc_num_ports(struct usb_serial
*serial
)
2400 int mos7840_num_ports
;
2402 usb_control_msg(serial
->dev
, usb_rcvctrlpipe(serial
->dev
, 0),
2403 MCS_RDREQ
, MCS_RD_RTYPE
, 0, GPIO_REGISTER
, &data
,
2404 VENDOR_READ_LENGTH
, MOS_WDR_TIMEOUT
);
2406 if (serial
->dev
->descriptor
.idProduct
== MOSCHIP_DEVICE_ID_7810
||
2407 serial
->dev
->descriptor
.idProduct
== MOSCHIP_DEVICE_ID_7820
) {
2408 device_type
= serial
->dev
->descriptor
.idProduct
;
2410 /* For a MCS7840 device GPIO0 must be set to 1 */
2411 if ((data
& 0x01) == 1)
2412 device_type
= MOSCHIP_DEVICE_ID_7840
;
2413 else if (mos7810_check(serial
))
2414 device_type
= MOSCHIP_DEVICE_ID_7810
;
2416 device_type
= MOSCHIP_DEVICE_ID_7820
;
2419 mos7840_num_ports
= (device_type
>> 4) & 0x000F;
2420 serial
->num_bulk_in
= mos7840_num_ports
;
2421 serial
->num_bulk_out
= mos7840_num_ports
;
2422 serial
->num_ports
= mos7840_num_ports
;
2424 return mos7840_num_ports
;
2427 /****************************************************************************
2429 ****************************************************************************/
2431 static int mos7840_startup(struct usb_serial
*serial
)
2433 struct moschip_port
*mos7840_port
;
2434 struct usb_device
*dev
;
2439 dbg("%s", "Invalid Handler");
2445 /* we set up the pointers to the endpoints in the mos7840_open *
2446 * function, as the structures aren't created yet. */
2448 /* set up port private structures */
2449 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2450 dbg ("mos7840_startup: configuring port %d............", i
);
2451 mos7840_port
= kzalloc(sizeof(struct moschip_port
), GFP_KERNEL
);
2452 if (mos7840_port
== NULL
) {
2453 dev_err(&dev
->dev
, "%s - Out of memory\n", __func__
);
2455 i
--; /* don't follow NULL pointer cleaning up */
2459 /* Initialize all port interrupt end point to port 0 int
2460 * endpoint. Our device has only one interrupt end point
2461 * common to all port */
2463 mos7840_port
->port
= serial
->port
[i
];
2464 mos7840_set_port_private(serial
->port
[i
], mos7840_port
);
2465 spin_lock_init(&mos7840_port
->pool_lock
);
2467 /* minor is not initialised until later by
2468 * usb-serial.c:get_free_serial() and cannot therefore be used
2469 * to index device instances */
2470 mos7840_port
->port_num
= i
+ 1;
2471 dbg ("serial->port[i]->number = %d", serial
->port
[i
]->number
);
2472 dbg ("serial->port[i]->serial->minor = %d", serial
->port
[i
]->serial
->minor
);
2473 dbg ("mos7840_port->port_num = %d", mos7840_port
->port_num
);
2474 dbg ("serial->minor = %d", serial
->minor
);
2476 if (mos7840_port
->port_num
== 1) {
2477 mos7840_port
->SpRegOffset
= 0x0;
2478 mos7840_port
->ControlRegOffset
= 0x1;
2479 mos7840_port
->DcrRegOffset
= 0x4;
2480 } else if ((mos7840_port
->port_num
== 2)
2481 && (serial
->num_ports
== 4)) {
2482 mos7840_port
->SpRegOffset
= 0x8;
2483 mos7840_port
->ControlRegOffset
= 0x9;
2484 mos7840_port
->DcrRegOffset
= 0x16;
2485 } else if ((mos7840_port
->port_num
== 2)
2486 && (serial
->num_ports
== 2)) {
2487 mos7840_port
->SpRegOffset
= 0xa;
2488 mos7840_port
->ControlRegOffset
= 0xb;
2489 mos7840_port
->DcrRegOffset
= 0x19;
2490 } else if ((mos7840_port
->port_num
== 3)
2491 && (serial
->num_ports
== 4)) {
2492 mos7840_port
->SpRegOffset
= 0xa;
2493 mos7840_port
->ControlRegOffset
= 0xb;
2494 mos7840_port
->DcrRegOffset
= 0x19;
2495 } else if ((mos7840_port
->port_num
== 4)
2496 && (serial
->num_ports
== 4)) {
2497 mos7840_port
->SpRegOffset
= 0xc;
2498 mos7840_port
->ControlRegOffset
= 0xd;
2499 mos7840_port
->DcrRegOffset
= 0x1c;
2501 mos7840_dump_serial_port(mos7840_port
);
2502 mos7840_set_port_private(serial
->port
[i
], mos7840_port
);
2504 /* enable rx_disable bit in control register */
2505 status
= mos7840_get_reg_sync(serial
->port
[i
],
2506 mos7840_port
->ControlRegOffset
, &Data
);
2508 dbg("Reading ControlReg failed status-0x%x", status
);
2511 dbg("ControlReg Reading success val is %x, status%d",
2513 Data
|= 0x08; /* setting driver done bit */
2514 Data
|= 0x04; /* sp1_bit to have cts change reflect in
2517 /* Data |= 0x20; //rx_disable bit */
2518 status
= mos7840_set_reg_sync(serial
->port
[i
],
2519 mos7840_port
->ControlRegOffset
, Data
);
2521 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status
);
2524 dbg("ControlReg Writing success(rx_disable) status%d",
2527 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2530 status
= mos7840_set_reg_sync(serial
->port
[i
],
2531 (__u16
) (mos7840_port
->DcrRegOffset
+ 0), Data
);
2533 dbg("Writing DCR0 failed status-0x%x", status
);
2536 dbg("DCR0 Writing success status%d", status
);
2539 status
= mos7840_set_reg_sync(serial
->port
[i
],
2540 (__u16
) (mos7840_port
->DcrRegOffset
+ 1), Data
);
2542 dbg("Writing DCR1 failed status-0x%x", status
);
2545 dbg("DCR1 Writing success status%d", status
);
2548 status
= mos7840_set_reg_sync(serial
->port
[i
],
2549 (__u16
) (mos7840_port
->DcrRegOffset
+ 2), Data
);
2551 dbg("Writing DCR2 failed status-0x%x", status
);
2554 dbg("DCR2 Writing success status%d", status
);
2556 /* write values in clkstart0x0 and clkmulti 0x20 */
2558 status
= mos7840_set_reg_sync(serial
->port
[i
],
2559 CLK_START_VALUE_REGISTER
, Data
);
2561 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status
);
2564 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status
);
2567 status
= mos7840_set_reg_sync(serial
->port
[i
],
2568 CLK_MULTI_REGISTER
, Data
);
2570 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x",
2574 dbg("CLK_MULTI_REGISTER Writing success status%d",
2577 /* write value 0x0 to scratchpad register */
2579 status
= mos7840_set_uart_reg(serial
->port
[i
],
2580 SCRATCH_PAD_REGISTER
, Data
);
2582 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x",
2586 dbg("SCRATCH_PAD_REGISTER Writing success status%d",
2589 /* Zero Length flag register */
2590 if ((mos7840_port
->port_num
!= 1)
2591 && (serial
->num_ports
== 2)) {
2594 status
= mos7840_set_reg_sync(serial
->port
[i
],
2596 ((__u16
)mos7840_port
->port_num
)), Data
);
2597 dbg("ZLIP offset %x",
2599 ((__u16
) mos7840_port
->port_num
)));
2601 dbg("Writing ZLP_REG%d failed status-0x%x",
2605 dbg("ZLP_REG%d Writing success status%d",
2609 status
= mos7840_set_reg_sync(serial
->port
[i
],
2611 ((__u16
)mos7840_port
->port_num
) - 0x1), Data
);
2612 dbg("ZLIP offset %x",
2614 ((__u16
) mos7840_port
->port_num
) - 0x1));
2616 dbg("Writing ZLP_REG%d failed status-0x%x",
2620 dbg("ZLP_REG%d Writing success status%d",
2624 mos7840_port
->control_urb
= usb_alloc_urb(0, GFP_KERNEL
);
2625 mos7840_port
->ctrl_buf
= kmalloc(16, GFP_KERNEL
);
2626 mos7840_port
->dr
= kmalloc(sizeof(struct usb_ctrlrequest
),
2628 if (!mos7840_port
->control_urb
|| !mos7840_port
->ctrl_buf
||
2629 !mos7840_port
->dr
) {
2634 mos7840_port
->has_led
= false;
2636 /* Initialize LED timers */
2637 if (device_type
== MOSCHIP_DEVICE_ID_7810
) {
2638 mos7840_port
->has_led
= true;
2640 init_timer(&mos7840_port
->led_timer1
);
2641 mos7840_port
->led_timer1
.function
= mos7840_led_off
;
2642 mos7840_port
->led_timer1
.expires
=
2643 jiffies
+ msecs_to_jiffies(LED_ON_MS
);
2644 mos7840_port
->led_timer1
.data
=
2645 (unsigned long)mos7840_port
;
2647 init_timer(&mos7840_port
->led_timer2
);
2648 mos7840_port
->led_timer2
.function
=
2649 mos7840_led_flag_off
;
2650 mos7840_port
->led_timer2
.expires
=
2651 jiffies
+ msecs_to_jiffies(LED_OFF_MS
);
2652 mos7840_port
->led_timer2
.data
=
2653 (unsigned long)mos7840_port
;
2655 mos7840_port
->led_flag
= false;
2658 mos7840_set_led_sync(serial
->port
[i
],
2659 MODEM_CONTROL_REGISTER
, 0x0300);
2662 dbg ("mos7840_startup: all ports configured...........");
2664 /* Zero Length flag enable */
2666 status
= mos7840_set_reg_sync(serial
->port
[0], ZLP_REG5
, Data
);
2668 dbg("Writing ZLP_REG5 failed status-0x%x", status
);
2671 dbg("ZLP_REG5 Writing success status%d", status
);
2673 /* setting configuration feature to one */
2674 usb_control_msg(serial
->dev
, usb_sndctrlpipe(serial
->dev
, 0),
2675 (__u8
) 0x03, 0x00, 0x01, 0x00, NULL
, 0x00, 5 * HZ
);
2678 for (/* nothing */; i
>= 0; i
--) {
2679 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
2681 kfree(mos7840_port
->dr
);
2682 kfree(mos7840_port
->ctrl_buf
);
2683 usb_free_urb(mos7840_port
->control_urb
);
2684 kfree(mos7840_port
);
2685 serial
->port
[i
] = NULL
;
2690 /****************************************************************************
2691 * mos7840_disconnect
2692 * This function is called whenever the device is removed from the usb bus.
2693 ****************************************************************************/
2695 static void mos7840_disconnect(struct usb_serial
*serial
)
2698 unsigned long flags
;
2699 struct moschip_port
*mos7840_port
;
2702 dbg("%s", "Invalid Handler");
2706 /* check for the ports to be closed,close the ports and disconnect */
2708 /* free private structure allocated for serial port *
2709 * stop reads and writes on all ports */
2711 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2712 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
2713 dbg ("mos7840_port %d = %p", i
, mos7840_port
);
2715 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
2716 mos7840_port
->zombie
= 1;
2717 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
2718 usb_kill_urb(mos7840_port
->control_urb
);
2723 /****************************************************************************
2725 * This function is called when the usb_serial structure is freed.
2726 ****************************************************************************/
2728 static void mos7840_release(struct usb_serial
*serial
)
2731 struct moschip_port
*mos7840_port
;
2734 dbg("%s", "Invalid Handler");
2738 /* check for the ports to be closed,close the ports and disconnect */
2740 /* free private structure allocated for serial port *
2741 * stop reads and writes on all ports */
2743 for (i
= 0; i
< serial
->num_ports
; ++i
) {
2744 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
2745 dbg("mos7840_port %d = %p", i
, mos7840_port
);
2747 if (mos7840_port
->has_led
) {
2749 mos7840_set_led_sync(mos7840_port
->port
,
2750 MODEM_CONTROL_REGISTER
, 0x0300);
2752 del_timer_sync(&mos7840_port
->led_timer1
);
2753 del_timer_sync(&mos7840_port
->led_timer2
);
2755 kfree(mos7840_port
->ctrl_buf
);
2756 kfree(mos7840_port
->dr
);
2757 kfree(mos7840_port
);
2762 static struct usb_serial_driver moschip7840_4port_device
= {
2764 .owner
= THIS_MODULE
,
2767 .description
= DRIVER_DESC
,
2768 .id_table
= id_table
,
2770 .open
= mos7840_open
,
2771 .close
= mos7840_close
,
2772 .write
= mos7840_write
,
2773 .write_room
= mos7840_write_room
,
2774 .chars_in_buffer
= mos7840_chars_in_buffer
,
2775 .throttle
= mos7840_throttle
,
2776 .unthrottle
= mos7840_unthrottle
,
2777 .calc_num_ports
= mos7840_calc_num_ports
,
2778 #ifdef MCSSerialProbe
2779 .probe
= mos7840_serial_probe
,
2781 .ioctl
= mos7840_ioctl
,
2782 .set_termios
= mos7840_set_termios
,
2783 .break_ctl
= mos7840_break
,
2784 .tiocmget
= mos7840_tiocmget
,
2785 .tiocmset
= mos7840_tiocmset
,
2786 .get_icount
= mos7840_get_icount
,
2787 .attach
= mos7840_startup
,
2788 .disconnect
= mos7840_disconnect
,
2789 .release
= mos7840_release
,
2790 .read_bulk_callback
= mos7840_bulk_in_callback
,
2791 .read_int_callback
= mos7840_interrupt_callback
,
2794 static struct usb_serial_driver
* const serial_drivers
[] = {
2795 &moschip7840_4port_device
, NULL
2798 module_usb_serial_driver(serial_drivers
, id_table
);
2800 MODULE_DESCRIPTION(DRIVER_DESC
);
2801 MODULE_LICENSE("GPL");
2803 module_param(debug
, bool, S_IRUGO
| S_IWUSR
);
2804 MODULE_PARM_DESC(debug
, "Debug enabled or not");