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/slab.h>
28 #include <linux/tty.h>
29 #include <linux/tty_driver.h>
30 #include <linux/tty_flip.h>
31 #include <linux/module.h>
32 #include <linux/serial.h>
33 #include <linux/usb.h>
34 #include <linux/usb/serial.h>
35 #include <linux/uaccess.h>
37 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
40 * 16C50 UART register defines
43 #define LCR_BITS_5 0x00 /* 5 bits/char */
44 #define LCR_BITS_6 0x01 /* 6 bits/char */
45 #define LCR_BITS_7 0x02 /* 7 bits/char */
46 #define LCR_BITS_8 0x03 /* 8 bits/char */
47 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
49 #define LCR_STOP_1 0x00 /* 1 stop bit */
50 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
51 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
52 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
54 #define LCR_PAR_NONE 0x00 /* No parity */
55 #define LCR_PAR_ODD 0x08 /* Odd parity */
56 #define LCR_PAR_EVEN 0x18 /* Even parity */
57 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
58 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
59 #define LCR_PAR_MASK 0x38 /* Mask for parity field */
61 #define LCR_SET_BREAK 0x40 /* Set Break condition */
62 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
64 #define MCR_DTR 0x01 /* Assert DTR */
65 #define MCR_RTS 0x02 /* Assert RTS */
66 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
67 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
68 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
69 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
71 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
72 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
73 #define MOS7840_MSR_RI 0x40 /* Current state of RI */
74 #define MOS7840_MSR_CD 0x80 /* Current state of CD */
77 * Defines used for sending commands to port
80 #define MOS_WDR_TIMEOUT 5000 /* default urb timeout */
82 #define MOS_PORT1 0x0200
83 #define MOS_PORT2 0x0300
84 #define MOS_VENREG 0x0000
85 #define MOS_MAX_PORT 0x02
86 #define MOS_WRITE 0x0E
90 #define MCS_RD_RTYPE 0xC0
91 #define MCS_WR_RTYPE 0x40
92 #define MCS_RDREQ 0x0D
93 #define MCS_WRREQ 0x0E
94 #define MCS_CTRL_TIMEOUT 500
95 #define VENDOR_READ_LENGTH (0x01)
97 #define MAX_NAME_LEN 64
99 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
100 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
102 /* For higher baud Rates use TIOCEXBAUD */
103 #define TIOCEXBAUD 0x5462
105 /* vendor id and device id defines */
107 /* The native mos7840/7820 component */
108 #define USB_VENDOR_ID_MOSCHIP 0x9710
109 #define MOSCHIP_DEVICE_ID_7840 0x7840
110 #define MOSCHIP_DEVICE_ID_7820 0x7820
111 #define MOSCHIP_DEVICE_ID_7810 0x7810
112 /* The native component can have its vendor/device id's overridden
113 * in vendor-specific implementations. Such devices can be handled
114 * by making a change here, in id_table.
116 #define USB_VENDOR_ID_BANDB 0x0856
117 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
118 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00
119 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
120 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01
121 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29
122 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30
123 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31
124 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32
125 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
126 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02
127 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
128 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
129 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
131 /* This driver also supports
132 * ATEN UC2324 device using Moschip MCS7840
133 * ATEN UC2322 device using Moschip MCS7820
135 #define USB_VENDOR_ID_ATENINTL 0x0557
136 #define ATENINTL_DEVICE_ID_UC2324 0x2011
137 #define ATENINTL_DEVICE_ID_UC2322 0x7820
139 /* Interrupt Routine Defines */
141 #define SERIAL_IIR_RLS 0x06
142 #define SERIAL_IIR_MS 0x00
145 * Emulation of the bit mask on the LINE STATUS REGISTER.
147 #define SERIAL_LSR_DR 0x0001
148 #define SERIAL_LSR_OE 0x0002
149 #define SERIAL_LSR_PE 0x0004
150 #define SERIAL_LSR_FE 0x0008
151 #define SERIAL_LSR_BI 0x0010
153 #define MOS_MSR_DELTA_CTS 0x10
154 #define MOS_MSR_DELTA_DSR 0x20
155 #define MOS_MSR_DELTA_RI 0x40
156 #define MOS_MSR_DELTA_CD 0x80
158 /* Serial Port register Address */
159 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
160 #define FIFO_CONTROL_REGISTER ((__u16)(0x02))
161 #define LINE_CONTROL_REGISTER ((__u16)(0x03))
162 #define MODEM_CONTROL_REGISTER ((__u16)(0x04))
163 #define LINE_STATUS_REGISTER ((__u16)(0x05))
164 #define MODEM_STATUS_REGISTER ((__u16)(0x06))
165 #define SCRATCH_PAD_REGISTER ((__u16)(0x07))
166 #define DIVISOR_LATCH_LSB ((__u16)(0x00))
167 #define DIVISOR_LATCH_MSB ((__u16)(0x01))
169 #define CLK_MULTI_REGISTER ((__u16)(0x02))
170 #define CLK_START_VALUE_REGISTER ((__u16)(0x03))
171 #define GPIO_REGISTER ((__u16)(0x07))
173 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
176 * URB POOL related defines
178 #define NUM_URBS 16 /* URB Count */
179 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
181 /* LED on/off milliseconds*/
182 #define LED_ON_MS 500
183 #define LED_OFF_MS 500
186 MOS7840_FLAG_CTRL_BUSY
,
187 MOS7840_FLAG_LED_BUSY
,
190 static const struct usb_device_id id_table
[] = {
191 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7840
)},
192 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7820
)},
193 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP
, MOSCHIP_DEVICE_ID_7810
)},
194 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_2
)},
195 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_2P
)},
196 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_4
)},
197 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USO9ML2_4P
)},
198 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_US9ML2_2
)},
199 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_US9ML2_4
)},
200 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USPTL4_2
)},
201 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USPTL4_4
)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_2
)},
203 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_2P
)},
204 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_4
)},
205 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL4_4P
)},
206 {USB_DEVICE(USB_VENDOR_ID_BANDB
, BANDB_DEVICE_ID_USOPTL2_4
)},
207 {USB_DEVICE(USB_VENDOR_ID_ATENINTL
, ATENINTL_DEVICE_ID_UC2324
)},
208 {USB_DEVICE(USB_VENDOR_ID_ATENINTL
, ATENINTL_DEVICE_ID_UC2322
)},
209 {} /* terminating entry */
211 MODULE_DEVICE_TABLE(usb
, id_table
);
213 /* This structure holds all of the local port information */
215 struct moschip_port
{
216 int port_num
; /*Actual port number in the device(1,2,etc) */
217 struct urb
*write_urb
; /* write URB for this port */
218 struct urb
*read_urb
; /* read URB for this port */
219 __u8 shadowLCR
; /* last LCR value received */
220 __u8 shadowMCR
; /* last MCR value received */
223 struct usb_serial_port
*port
; /* loop back to the owner of this object */
227 __u8 ControlRegOffset
;
229 /* for processing control URBS in interrupt context */
230 struct urb
*control_urb
;
231 struct usb_ctrlrequest
*dr
;
235 spinlock_t pool_lock
;
236 struct urb
*write_urb_pool
[NUM_URBS
];
240 /* For device(s) with LED indicator */
242 struct timer_list led_timer1
; /* Timer for LED on */
243 struct timer_list led_timer2
; /* Timer for LED off */
245 struct usb_ctrlrequest
*led_dr
;
251 * mos7840_set_reg_sync
252 * To set the Control register by calling usb_fill_control_urb function
253 * by passing usb_sndctrlpipe function as parameter.
256 static int mos7840_set_reg_sync(struct usb_serial_port
*port
, __u16 reg
,
259 struct usb_device
*dev
= port
->serial
->dev
;
261 dev_dbg(&port
->dev
, "mos7840_set_reg_sync offset is %x, value %x\n", reg
, val
);
263 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), MCS_WRREQ
,
264 MCS_WR_RTYPE
, val
, reg
, NULL
, 0,
269 * mos7840_get_reg_sync
270 * To set the Uart register by calling usb_fill_control_urb function by
271 * passing usb_rcvctrlpipe function as parameter.
274 static int mos7840_get_reg_sync(struct usb_serial_port
*port
, __u16 reg
,
277 struct usb_device
*dev
= port
->serial
->dev
;
281 buf
= kmalloc(VENDOR_READ_LENGTH
, GFP_KERNEL
);
285 ret
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0), MCS_RDREQ
,
286 MCS_RD_RTYPE
, 0, reg
, buf
, VENDOR_READ_LENGTH
,
289 dev_dbg(&port
->dev
, "%s offset is %x, return val %x\n", __func__
, reg
, *val
);
296 * mos7840_set_uart_reg
297 * To set the Uart register by calling usb_fill_control_urb function by
298 * passing usb_sndctrlpipe function as parameter.
301 static int mos7840_set_uart_reg(struct usb_serial_port
*port
, __u16 reg
,
305 struct usb_device
*dev
= port
->serial
->dev
;
307 /* For the UART control registers, the application number need
309 if (port
->serial
->num_ports
== 4) {
310 val
|= ((__u16
)port
->port_number
+ 1) << 8;
312 if (port
->port_number
== 0) {
313 val
|= ((__u16
)port
->port_number
+ 1) << 8;
315 val
|= ((__u16
)port
->port_number
+ 2) << 8;
318 dev_dbg(&port
->dev
, "%s application number is %x\n", __func__
, val
);
319 return usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), MCS_WRREQ
,
320 MCS_WR_RTYPE
, val
, reg
, NULL
, 0,
326 * mos7840_get_uart_reg
327 * To set the Control register by calling usb_fill_control_urb function
328 * by passing usb_rcvctrlpipe function as parameter.
330 static int mos7840_get_uart_reg(struct usb_serial_port
*port
, __u16 reg
,
333 struct usb_device
*dev
= port
->serial
->dev
;
338 buf
= kmalloc(VENDOR_READ_LENGTH
, GFP_KERNEL
);
342 /* Wval is same as application number */
343 if (port
->serial
->num_ports
== 4) {
344 Wval
= ((__u16
)port
->port_number
+ 1) << 8;
346 if (port
->port_number
== 0) {
347 Wval
= ((__u16
)port
->port_number
+ 1) << 8;
349 Wval
= ((__u16
)port
->port_number
+ 2) << 8;
352 dev_dbg(&port
->dev
, "%s application number is %x\n", __func__
, Wval
);
353 ret
= usb_control_msg(dev
, usb_rcvctrlpipe(dev
, 0), MCS_RDREQ
,
354 MCS_RD_RTYPE
, Wval
, reg
, buf
, VENDOR_READ_LENGTH
,
362 static void mos7840_dump_serial_port(struct usb_serial_port
*port
,
363 struct moschip_port
*mos7840_port
)
366 dev_dbg(&port
->dev
, "SpRegOffset is %2x\n", mos7840_port
->SpRegOffset
);
367 dev_dbg(&port
->dev
, "ControlRegOffset is %2x\n", mos7840_port
->ControlRegOffset
);
368 dev_dbg(&port
->dev
, "DCRRegOffset is %2x\n", mos7840_port
->DcrRegOffset
);
372 /************************************************************************/
373 /************************************************************************/
374 /* I N T E R F A C E F U N C T I O N S */
375 /* I N T E R F A C E F U N C T I O N S */
376 /************************************************************************/
377 /************************************************************************/
379 static inline void mos7840_set_port_private(struct usb_serial_port
*port
,
380 struct moschip_port
*data
)
382 usb_set_serial_port_data(port
, (void *)data
);
385 static inline struct moschip_port
*mos7840_get_port_private(struct
389 return (struct moschip_port
*)usb_get_serial_port_data(port
);
392 static void mos7840_handle_new_msr(struct moschip_port
*port
, __u8 new_msr
)
394 struct moschip_port
*mos7840_port
;
395 struct async_icount
*icount
;
398 (MOS_MSR_DELTA_CTS
| MOS_MSR_DELTA_DSR
| MOS_MSR_DELTA_RI
|
400 icount
= &mos7840_port
->port
->icount
;
402 /* update input line counters */
403 if (new_msr
& MOS_MSR_DELTA_CTS
)
405 if (new_msr
& MOS_MSR_DELTA_DSR
)
407 if (new_msr
& MOS_MSR_DELTA_CD
)
409 if (new_msr
& MOS_MSR_DELTA_RI
)
412 wake_up_interruptible(&port
->port
->port
.delta_msr_wait
);
416 static void mos7840_handle_new_lsr(struct moschip_port
*port
, __u8 new_lsr
)
418 struct async_icount
*icount
;
420 if (new_lsr
& SERIAL_LSR_BI
) {
422 * Parity and Framing errors only count if they
423 * occur exclusive of a break being
426 new_lsr
&= (__u8
) (SERIAL_LSR_OE
| SERIAL_LSR_BI
);
429 /* update input line counters */
430 icount
= &port
->port
->icount
;
431 if (new_lsr
& SERIAL_LSR_BI
)
433 if (new_lsr
& SERIAL_LSR_OE
)
435 if (new_lsr
& SERIAL_LSR_PE
)
437 if (new_lsr
& SERIAL_LSR_FE
)
441 /************************************************************************/
442 /************************************************************************/
443 /* U S B C A L L B A C K F U N C T I O N S */
444 /* U S B C A L L B A C K F U N C T I O N S */
445 /************************************************************************/
446 /************************************************************************/
448 static void mos7840_control_callback(struct urb
*urb
)
451 struct moschip_port
*mos7840_port
;
452 struct device
*dev
= &urb
->dev
->dev
;
454 int status
= urb
->status
;
456 mos7840_port
= urb
->context
;
465 /* this urb is terminated, clean up */
466 dev_dbg(dev
, "%s - urb shutting down with status: %d\n", __func__
, status
);
469 dev_dbg(dev
, "%s - nonzero urb status received: %d\n", __func__
, status
);
473 dev_dbg(dev
, "%s urb buffer size is %d\n", __func__
, urb
->actual_length
);
474 dev_dbg(dev
, "%s mos7840_port->MsrLsr is %d port %d\n", __func__
,
475 mos7840_port
->MsrLsr
, mos7840_port
->port_num
);
476 data
= urb
->transfer_buffer
;
477 regval
= (__u8
) data
[0];
478 dev_dbg(dev
, "%s data is %x\n", __func__
, regval
);
479 if (mos7840_port
->MsrLsr
== 0)
480 mos7840_handle_new_msr(mos7840_port
, regval
);
481 else if (mos7840_port
->MsrLsr
== 1)
482 mos7840_handle_new_lsr(mos7840_port
, regval
);
484 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY
, &mos7840_port
->flags
);
487 static int mos7840_get_reg(struct moschip_port
*mcs
, __u16 Wval
, __u16 reg
,
490 struct usb_device
*dev
= mcs
->port
->serial
->dev
;
491 struct usb_ctrlrequest
*dr
= mcs
->dr
;
492 unsigned char *buffer
= mcs
->ctrl_buf
;
495 if (test_and_set_bit_lock(MOS7840_FLAG_CTRL_BUSY
, &mcs
->flags
))
498 dr
->bRequestType
= MCS_RD_RTYPE
;
499 dr
->bRequest
= MCS_RDREQ
;
500 dr
->wValue
= cpu_to_le16(Wval
); /* 0 */
501 dr
->wIndex
= cpu_to_le16(reg
);
502 dr
->wLength
= cpu_to_le16(2);
504 usb_fill_control_urb(mcs
->control_urb
, dev
, usb_rcvctrlpipe(dev
, 0),
505 (unsigned char *)dr
, buffer
, 2,
506 mos7840_control_callback
, mcs
);
507 mcs
->control_urb
->transfer_buffer_length
= 2;
508 ret
= usb_submit_urb(mcs
->control_urb
, GFP_ATOMIC
);
510 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY
, &mcs
->flags
);
515 static void mos7840_set_led_callback(struct urb
*urb
)
517 switch (urb
->status
) {
524 /* This urb is terminated, clean up */
525 dev_dbg(&urb
->dev
->dev
, "%s - urb shutting down: %d\n",
526 __func__
, urb
->status
);
529 dev_dbg(&urb
->dev
->dev
, "%s - nonzero urb status: %d\n",
530 __func__
, urb
->status
);
534 static void mos7840_set_led_async(struct moschip_port
*mcs
, __u16 wval
,
537 struct usb_device
*dev
= mcs
->port
->serial
->dev
;
538 struct usb_ctrlrequest
*dr
= mcs
->led_dr
;
540 dr
->bRequestType
= MCS_WR_RTYPE
;
541 dr
->bRequest
= MCS_WRREQ
;
542 dr
->wValue
= cpu_to_le16(wval
);
543 dr
->wIndex
= cpu_to_le16(reg
);
544 dr
->wLength
= cpu_to_le16(0);
546 usb_fill_control_urb(mcs
->led_urb
, dev
, usb_sndctrlpipe(dev
, 0),
547 (unsigned char *)dr
, NULL
, 0, mos7840_set_led_callback
, NULL
);
549 usb_submit_urb(mcs
->led_urb
, GFP_ATOMIC
);
552 static void mos7840_set_led_sync(struct usb_serial_port
*port
, __u16 reg
,
555 struct usb_device
*dev
= port
->serial
->dev
;
557 usb_control_msg(dev
, usb_sndctrlpipe(dev
, 0), MCS_WRREQ
, MCS_WR_RTYPE
,
558 val
, reg
, NULL
, 0, MOS_WDR_TIMEOUT
);
561 static void mos7840_led_off(unsigned long arg
)
563 struct moschip_port
*mcs
= (struct moschip_port
*) arg
;
566 mos7840_set_led_async(mcs
, 0x0300, MODEM_CONTROL_REGISTER
);
567 mod_timer(&mcs
->led_timer2
,
568 jiffies
+ msecs_to_jiffies(LED_OFF_MS
));
571 static void mos7840_led_flag_off(unsigned long arg
)
573 struct moschip_port
*mcs
= (struct moschip_port
*) arg
;
575 clear_bit_unlock(MOS7840_FLAG_LED_BUSY
, &mcs
->flags
);
578 static void mos7840_led_activity(struct usb_serial_port
*port
)
580 struct moschip_port
*mos7840_port
= usb_get_serial_port_data(port
);
582 if (test_and_set_bit_lock(MOS7840_FLAG_LED_BUSY
, &mos7840_port
->flags
))
585 mos7840_set_led_async(mos7840_port
, 0x0301, MODEM_CONTROL_REGISTER
);
586 mod_timer(&mos7840_port
->led_timer1
,
587 jiffies
+ msecs_to_jiffies(LED_ON_MS
));
590 /*****************************************************************************
591 * mos7840_interrupt_callback
592 * this is the callback function for when we have received data on the
593 * interrupt endpoint.
594 *****************************************************************************/
596 static void mos7840_interrupt_callback(struct urb
*urb
)
600 struct moschip_port
*mos7840_port
;
601 struct usb_serial
*serial
;
606 __u16 wval
, wreg
= 0;
607 int status
= urb
->status
;
616 /* this urb is terminated, clean up */
617 dev_dbg(&urb
->dev
->dev
, "%s - urb shutting down with status: %d\n",
621 dev_dbg(&urb
->dev
->dev
, "%s - nonzero urb status received: %d\n",
626 length
= urb
->actual_length
;
627 data
= urb
->transfer_buffer
;
629 serial
= urb
->context
;
631 /* Moschip get 5 bytes
632 * Byte 1 IIR Port 1 (port.number is 0)
633 * Byte 2 IIR Port 2 (port.number is 1)
634 * Byte 3 IIR Port 3 (port.number is 2)
635 * Byte 4 IIR Port 4 (port.number is 3)
636 * Byte 5 FIFO status for both */
639 dev_dbg(&urb
->dev
->dev
, "%s", "Wrong data !!!\n");
643 sp
[0] = (__u8
) data
[0];
644 sp
[1] = (__u8
) data
[1];
645 sp
[2] = (__u8
) data
[2];
646 sp
[3] = (__u8
) data
[3];
649 for (i
= 0; i
< serial
->num_ports
; i
++) {
650 mos7840_port
= mos7840_get_port_private(serial
->port
[i
]);
651 wval
= ((__u16
)serial
->port
[i
]->port_number
+ 1) << 8;
652 if (mos7840_port
->open
) {
654 dev_dbg(&urb
->dev
->dev
, "SP%d No Interrupt !!!\n", i
);
656 switch (sp
[i
] & 0x0f) {
658 dev_dbg(&urb
->dev
->dev
, "Serial Port %d: Receiver status error or \n", i
);
659 dev_dbg(&urb
->dev
->dev
, "address bit detected in 9-bit mode\n");
660 mos7840_port
->MsrLsr
= 1;
661 wreg
= LINE_STATUS_REGISTER
;
664 dev_dbg(&urb
->dev
->dev
, "Serial Port %d: Modem status change\n", i
);
665 mos7840_port
->MsrLsr
= 0;
666 wreg
= MODEM_STATUS_REGISTER
;
669 rv
= mos7840_get_reg(mos7840_port
, wval
, wreg
, &Data
);
674 /* the completion handler for the control urb will resubmit */
677 result
= usb_submit_urb(urb
, GFP_ATOMIC
);
679 dev_err(&urb
->dev
->dev
,
680 "%s - Error %d submitting interrupt urb\n",
685 static int mos7840_port_paranoia_check(struct usb_serial_port
*port
,
686 const char *function
)
689 pr_debug("%s - port == NULL\n", function
);
693 pr_debug("%s - port->serial == NULL\n", function
);
700 /* Inline functions to check the sanity of a pointer that is passed to us */
701 static int mos7840_serial_paranoia_check(struct usb_serial
*serial
,
702 const char *function
)
705 pr_debug("%s - serial == NULL\n", function
);
709 pr_debug("%s - serial->type == NULL!\n", function
);
716 static struct usb_serial
*mos7840_get_usb_serial(struct usb_serial_port
*port
,
717 const char *function
)
719 /* if no port was specified, or it fails a paranoia check */
721 mos7840_port_paranoia_check(port
, function
) ||
722 mos7840_serial_paranoia_check(port
->serial
, function
)) {
723 /* then say that we don't have a valid usb_serial thing,
724 * which will end up genrating -ENODEV return values */
731 /*****************************************************************************
732 * mos7840_bulk_in_callback
733 * this is the callback function for when we have received data on the
735 *****************************************************************************/
737 static void mos7840_bulk_in_callback(struct urb
*urb
)
741 struct usb_serial
*serial
;
742 struct usb_serial_port
*port
;
743 struct moschip_port
*mos7840_port
;
744 int status
= urb
->status
;
746 mos7840_port
= urb
->context
;
751 dev_dbg(&urb
->dev
->dev
, "nonzero read bulk status received: %d\n", status
);
752 mos7840_port
->read_urb_busy
= false;
756 port
= mos7840_port
->port
;
757 if (mos7840_port_paranoia_check(port
, __func__
)) {
758 mos7840_port
->read_urb_busy
= false;
762 serial
= mos7840_get_usb_serial(port
, __func__
);
764 mos7840_port
->read_urb_busy
= false;
768 data
= urb
->transfer_buffer
;
769 usb_serial_debug_data(&port
->dev
, __func__
, urb
->actual_length
, data
);
771 if (urb
->actual_length
) {
772 struct tty_port
*tport
= &mos7840_port
->port
->port
;
773 tty_insert_flip_string(tport
, data
, urb
->actual_length
);
774 tty_flip_buffer_push(tport
);
775 port
->icount
.rx
+= urb
->actual_length
;
776 dev_dbg(&port
->dev
, "icount.rx is %d:\n", port
->icount
.rx
);
779 if (!mos7840_port
->read_urb
) {
780 dev_dbg(&port
->dev
, "%s", "URB KILLED !!!\n");
781 mos7840_port
->read_urb_busy
= false;
785 if (mos7840_port
->has_led
)
786 mos7840_led_activity(port
);
788 mos7840_port
->read_urb_busy
= true;
789 retval
= usb_submit_urb(mos7840_port
->read_urb
, GFP_ATOMIC
);
792 dev_dbg(&port
->dev
, "usb_submit_urb(read bulk) failed, retval = %d\n", retval
);
793 mos7840_port
->read_urb_busy
= false;
797 /*****************************************************************************
798 * mos7840_bulk_out_data_callback
799 * this is the callback function for when we have finished sending
800 * serial data on the bulk out endpoint.
801 *****************************************************************************/
803 static void mos7840_bulk_out_data_callback(struct urb
*urb
)
805 struct moschip_port
*mos7840_port
;
806 struct usb_serial_port
*port
;
807 int status
= urb
->status
;
810 mos7840_port
= urb
->context
;
811 port
= mos7840_port
->port
;
812 spin_lock(&mos7840_port
->pool_lock
);
813 for (i
= 0; i
< NUM_URBS
; i
++) {
814 if (urb
== mos7840_port
->write_urb_pool
[i
]) {
815 mos7840_port
->busy
[i
] = 0;
819 spin_unlock(&mos7840_port
->pool_lock
);
822 dev_dbg(&port
->dev
, "nonzero write bulk status received:%d\n", status
);
826 if (mos7840_port_paranoia_check(port
, __func__
))
829 if (mos7840_port
->open
)
830 tty_port_tty_wakeup(&port
->port
);
834 /************************************************************************/
835 /* 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 */
836 /************************************************************************/
838 /*****************************************************************************
840 * this function is called by the tty driver when a port is opened
841 * If successful, we return 0
842 * Otherwise we return a negative error number.
843 *****************************************************************************/
845 static int mos7840_open(struct tty_struct
*tty
, struct usb_serial_port
*port
)
849 struct usb_serial
*serial
;
853 struct moschip_port
*mos7840_port
;
854 struct moschip_port
*port0
;
856 if (mos7840_port_paranoia_check(port
, __func__
))
859 serial
= port
->serial
;
861 if (mos7840_serial_paranoia_check(serial
, __func__
))
864 mos7840_port
= mos7840_get_port_private(port
);
865 port0
= mos7840_get_port_private(serial
->port
[0]);
867 if (mos7840_port
== NULL
|| port0
== NULL
)
870 usb_clear_halt(serial
->dev
, port
->write_urb
->pipe
);
871 usb_clear_halt(serial
->dev
, port
->read_urb
->pipe
);
874 /* Initialising the write urb pool */
875 for (j
= 0; j
< NUM_URBS
; ++j
) {
876 urb
= usb_alloc_urb(0, GFP_KERNEL
);
877 mos7840_port
->write_urb_pool
[j
] = urb
;
881 urb
->transfer_buffer
= kmalloc(URB_TRANSFER_BUFFER_SIZE
,
883 if (!urb
->transfer_buffer
) {
885 mos7840_port
->write_urb_pool
[j
] = NULL
;
890 /*****************************************************************************
891 * Initialize MCS7840 -- Write Init values to corresponding Registers
899 * 0x08 : SP1/2 Control Reg
900 *****************************************************************************/
902 /* NEED to check the following Block */
905 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
, &Data
);
907 dev_dbg(&port
->dev
, "Reading Spreg failed\n");
911 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
913 dev_dbg(&port
->dev
, "writing Spreg failed\n");
918 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
920 dev_dbg(&port
->dev
, "writing Spreg failed\n");
923 /* End of block to be checked */
926 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
929 dev_dbg(&port
->dev
, "Reading Controlreg failed\n");
932 Data
|= 0x08; /* Driver done bit */
933 Data
|= 0x20; /* rx_disable */
934 status
= mos7840_set_reg_sync(port
,
935 mos7840_port
->ControlRegOffset
, Data
);
937 dev_dbg(&port
->dev
, "writing Controlreg failed\n");
940 /* do register settings here */
941 /* Set all regs to the device default values. */
942 /***********************************
943 * First Disable all interrupts.
944 ***********************************/
946 status
= mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
948 dev_dbg(&port
->dev
, "disabling interrupts failed\n");
951 /* Set FIFO_CONTROL_REGISTER to the default value */
953 status
= mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
955 dev_dbg(&port
->dev
, "Writing FIFO_CONTROL_REGISTER failed\n");
960 status
= mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
962 dev_dbg(&port
->dev
, "Writing FIFO_CONTROL_REGISTER failed\n");
967 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
968 mos7840_port
->shadowLCR
= Data
;
971 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
972 mos7840_port
->shadowMCR
= Data
;
975 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
976 mos7840_port
->shadowLCR
= Data
;
978 Data
|= SERIAL_LCR_DLAB
; /* data latch enable in LCR 0x80 */
979 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
982 status
= mos7840_set_uart_reg(port
, DIVISOR_LATCH_LSB
, Data
);
985 status
= mos7840_set_uart_reg(port
, DIVISOR_LATCH_MSB
, Data
);
988 status
= mos7840_get_uart_reg(port
, LINE_CONTROL_REGISTER
, &Data
);
990 Data
= Data
& ~SERIAL_LCR_DLAB
;
991 status
= mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
992 mos7840_port
->shadowLCR
= Data
;
994 /* clearing Bulkin and Bulkout Fifo */
996 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
, &Data
);
999 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
1001 Data
= Data
& ~0x0c;
1002 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
, Data
);
1003 /* Finally enable all interrupts */
1005 status
= mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
1007 /* clearing rx_disable */
1009 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1011 Data
= Data
& ~0x20;
1012 status
= mos7840_set_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1017 status
= mos7840_get_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1020 status
= mos7840_set_reg_sync(port
, mos7840_port
->ControlRegOffset
,
1023 /* Check to see if we've set up our endpoint info yet *
1024 * (can't set it up in mos7840_startup as the structures *
1025 * were not set up at that time.) */
1026 if (port0
->open_ports
== 1) {
1027 if (serial
->port
[0]->interrupt_in_buffer
== NULL
) {
1028 /* set up interrupt urb */
1029 usb_fill_int_urb(serial
->port
[0]->interrupt_in_urb
,
1031 usb_rcvintpipe(serial
->dev
,
1032 serial
->port
[0]->interrupt_in_endpointAddress
),
1033 serial
->port
[0]->interrupt_in_buffer
,
1034 serial
->port
[0]->interrupt_in_urb
->
1035 transfer_buffer_length
,
1036 mos7840_interrupt_callback
,
1038 serial
->port
[0]->interrupt_in_urb
->interval
);
1040 /* start interrupt read for mos7840 *
1041 * will continue as long as mos7840 is connected */
1044 usb_submit_urb(serial
->port
[0]->interrupt_in_urb
,
1047 dev_err(&port
->dev
, "%s - Error %d submitting "
1048 "interrupt urb\n", __func__
, response
);
1055 /* see if we've set up our endpoint info yet *
1056 * (can't set it up in mos7840_startup as the *
1057 * structures were not set up at that time.) */
1059 dev_dbg(&port
->dev
, "port number is %d\n", port
->port_number
);
1060 dev_dbg(&port
->dev
, "minor number is %d\n", port
->minor
);
1061 dev_dbg(&port
->dev
, "Bulkin endpoint is %d\n", port
->bulk_in_endpointAddress
);
1062 dev_dbg(&port
->dev
, "BulkOut endpoint is %d\n", port
->bulk_out_endpointAddress
);
1063 dev_dbg(&port
->dev
, "Interrupt endpoint is %d\n", port
->interrupt_in_endpointAddress
);
1064 dev_dbg(&port
->dev
, "port's number in the device is %d\n", mos7840_port
->port_num
);
1065 mos7840_port
->read_urb
= port
->read_urb
;
1067 /* set up our bulk in urb */
1068 if ((serial
->num_ports
== 2) && (((__u16
)port
->port_number
% 2) != 0)) {
1069 usb_fill_bulk_urb(mos7840_port
->read_urb
,
1071 usb_rcvbulkpipe(serial
->dev
,
1072 (port
->bulk_in_endpointAddress
) + 2),
1073 port
->bulk_in_buffer
,
1074 mos7840_port
->read_urb
->transfer_buffer_length
,
1075 mos7840_bulk_in_callback
, mos7840_port
);
1077 usb_fill_bulk_urb(mos7840_port
->read_urb
,
1079 usb_rcvbulkpipe(serial
->dev
,
1080 port
->bulk_in_endpointAddress
),
1081 port
->bulk_in_buffer
,
1082 mos7840_port
->read_urb
->transfer_buffer_length
,
1083 mos7840_bulk_in_callback
, mos7840_port
);
1086 dev_dbg(&port
->dev
, "%s: bulkin endpoint is %d\n", __func__
, port
->bulk_in_endpointAddress
);
1087 mos7840_port
->read_urb_busy
= true;
1088 response
= usb_submit_urb(mos7840_port
->read_urb
, GFP_KERNEL
);
1090 dev_err(&port
->dev
, "%s - Error %d submitting control urb\n",
1091 __func__
, response
);
1092 mos7840_port
->read_urb_busy
= false;
1095 /* initialize our port settings */
1096 /* Must set to enable ints! */
1097 mos7840_port
->shadowMCR
= MCR_MASTER_IE
;
1098 /* send a open port command */
1099 mos7840_port
->open
= 1;
1100 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1104 for (j
= 0; j
< NUM_URBS
; ++j
) {
1105 urb
= mos7840_port
->write_urb_pool
[j
];
1108 kfree(urb
->transfer_buffer
);
1114 /*****************************************************************************
1115 * mos7840_chars_in_buffer
1116 * this function is called by the tty driver when it wants to know how many
1117 * bytes of data we currently have outstanding in the port (data that has
1118 * been written, but hasn't made it out the port yet)
1119 * If successful, we return the number of bytes left to be written in the
1121 * Otherwise we return zero.
1122 *****************************************************************************/
1124 static int mos7840_chars_in_buffer(struct tty_struct
*tty
)
1126 struct usb_serial_port
*port
= tty
->driver_data
;
1129 unsigned long flags
;
1130 struct moschip_port
*mos7840_port
;
1132 if (mos7840_port_paranoia_check(port
, __func__
))
1135 mos7840_port
= mos7840_get_port_private(port
);
1136 if (mos7840_port
== NULL
)
1139 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1140 for (i
= 0; i
< NUM_URBS
; ++i
) {
1141 if (mos7840_port
->busy
[i
]) {
1142 struct urb
*urb
= mos7840_port
->write_urb_pool
[i
];
1143 chars
+= urb
->transfer_buffer_length
;
1146 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1147 dev_dbg(&port
->dev
, "%s - returns %d\n", __func__
, chars
);
1152 /*****************************************************************************
1154 * this function is called by the tty driver when a port is closed
1155 *****************************************************************************/
1157 static void mos7840_close(struct usb_serial_port
*port
)
1159 struct usb_serial
*serial
;
1160 struct moschip_port
*mos7840_port
;
1161 struct moschip_port
*port0
;
1165 if (mos7840_port_paranoia_check(port
, __func__
))
1168 serial
= mos7840_get_usb_serial(port
, __func__
);
1172 mos7840_port
= mos7840_get_port_private(port
);
1173 port0
= mos7840_get_port_private(serial
->port
[0]);
1175 if (mos7840_port
== NULL
|| port0
== NULL
)
1178 for (j
= 0; j
< NUM_URBS
; ++j
)
1179 usb_kill_urb(mos7840_port
->write_urb_pool
[j
]);
1181 /* Freeing Write URBs */
1182 for (j
= 0; j
< NUM_URBS
; ++j
) {
1183 if (mos7840_port
->write_urb_pool
[j
]) {
1184 kfree(mos7840_port
->write_urb_pool
[j
]->transfer_buffer
);
1185 usb_free_urb(mos7840_port
->write_urb_pool
[j
]);
1189 usb_kill_urb(mos7840_port
->write_urb
);
1190 usb_kill_urb(mos7840_port
->read_urb
);
1191 mos7840_port
->read_urb_busy
= false;
1193 port0
->open_ports
--;
1194 dev_dbg(&port
->dev
, "%s in close%d\n", __func__
, port0
->open_ports
);
1195 if (port0
->open_ports
== 0) {
1196 if (serial
->port
[0]->interrupt_in_urb
) {
1197 dev_dbg(&port
->dev
, "Shutdown interrupt_in_urb\n");
1198 usb_kill_urb(serial
->port
[0]->interrupt_in_urb
);
1202 if (mos7840_port
->write_urb
) {
1203 /* if this urb had a transfer buffer already (old tx) free it */
1204 kfree(mos7840_port
->write_urb
->transfer_buffer
);
1205 usb_free_urb(mos7840_port
->write_urb
);
1209 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
1212 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
1214 mos7840_port
->open
= 0;
1217 /*****************************************************************************
1219 * this function sends a break to the port
1220 *****************************************************************************/
1221 static void mos7840_break(struct tty_struct
*tty
, int break_state
)
1223 struct usb_serial_port
*port
= tty
->driver_data
;
1225 struct usb_serial
*serial
;
1226 struct moschip_port
*mos7840_port
;
1228 if (mos7840_port_paranoia_check(port
, __func__
))
1231 serial
= mos7840_get_usb_serial(port
, __func__
);
1235 mos7840_port
= mos7840_get_port_private(port
);
1237 if (mos7840_port
== NULL
)
1240 if (break_state
== -1)
1241 data
= mos7840_port
->shadowLCR
| LCR_SET_BREAK
;
1243 data
= mos7840_port
->shadowLCR
& ~LCR_SET_BREAK
;
1245 /* FIXME: no locking on shadowLCR anywhere in driver */
1246 mos7840_port
->shadowLCR
= data
;
1247 dev_dbg(&port
->dev
, "%s mos7840_port->shadowLCR is %x\n", __func__
, mos7840_port
->shadowLCR
);
1248 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
,
1249 mos7840_port
->shadowLCR
);
1252 /*****************************************************************************
1253 * mos7840_write_room
1254 * this function is called by the tty driver when it wants to know how many
1255 * bytes of data we can accept for a specific port.
1256 * If successful, we return the amount of room that we have for this port
1257 * Otherwise we return a negative error number.
1258 *****************************************************************************/
1260 static int mos7840_write_room(struct tty_struct
*tty
)
1262 struct usb_serial_port
*port
= tty
->driver_data
;
1265 unsigned long flags
;
1266 struct moschip_port
*mos7840_port
;
1268 if (mos7840_port_paranoia_check(port
, __func__
))
1271 mos7840_port
= mos7840_get_port_private(port
);
1272 if (mos7840_port
== NULL
)
1275 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1276 for (i
= 0; i
< NUM_URBS
; ++i
) {
1277 if (!mos7840_port
->busy
[i
])
1278 room
+= URB_TRANSFER_BUFFER_SIZE
;
1280 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1282 room
= (room
== 0) ? 0 : room
- URB_TRANSFER_BUFFER_SIZE
+ 1;
1283 dev_dbg(&mos7840_port
->port
->dev
, "%s - returns %d\n", __func__
, room
);
1288 /*****************************************************************************
1290 * this function is called by the tty driver when data should be written to
1292 * If successful, we return the number of bytes written, otherwise we
1293 * return a negative error number.
1294 *****************************************************************************/
1296 static int mos7840_write(struct tty_struct
*tty
, struct usb_serial_port
*port
,
1297 const unsigned char *data
, int count
)
1303 unsigned long flags
;
1305 struct moschip_port
*mos7840_port
;
1306 struct usb_serial
*serial
;
1309 const unsigned char *current_position
= data
;
1310 unsigned char *data1
;
1312 if (mos7840_port_paranoia_check(port
, __func__
))
1315 serial
= port
->serial
;
1316 if (mos7840_serial_paranoia_check(serial
, __func__
))
1319 mos7840_port
= mos7840_get_port_private(port
);
1320 if (mos7840_port
== NULL
)
1323 /* try to find a free urb in the list */
1326 spin_lock_irqsave(&mos7840_port
->pool_lock
, flags
);
1327 for (i
= 0; i
< NUM_URBS
; ++i
) {
1328 if (!mos7840_port
->busy
[i
]) {
1329 mos7840_port
->busy
[i
] = 1;
1330 urb
= mos7840_port
->write_urb_pool
[i
];
1331 dev_dbg(&port
->dev
, "URB:%d\n", i
);
1335 spin_unlock_irqrestore(&mos7840_port
->pool_lock
, flags
);
1338 dev_dbg(&port
->dev
, "%s - no more free urbs\n", __func__
);
1342 if (urb
->transfer_buffer
== NULL
) {
1343 urb
->transfer_buffer
=
1344 kmalloc(URB_TRANSFER_BUFFER_SIZE
, GFP_KERNEL
);
1345 if (!urb
->transfer_buffer
)
1348 transfer_size
= min(count
, URB_TRANSFER_BUFFER_SIZE
);
1350 memcpy(urb
->transfer_buffer
, current_position
, transfer_size
);
1352 /* fill urb with data and submit */
1353 if ((serial
->num_ports
== 2) && (((__u16
)port
->port_number
% 2) != 0)) {
1354 usb_fill_bulk_urb(urb
,
1356 usb_sndbulkpipe(serial
->dev
,
1357 (port
->bulk_out_endpointAddress
) + 2),
1358 urb
->transfer_buffer
,
1360 mos7840_bulk_out_data_callback
, mos7840_port
);
1362 usb_fill_bulk_urb(urb
,
1364 usb_sndbulkpipe(serial
->dev
,
1365 port
->bulk_out_endpointAddress
),
1366 urb
->transfer_buffer
,
1368 mos7840_bulk_out_data_callback
, mos7840_port
);
1371 data1
= urb
->transfer_buffer
;
1372 dev_dbg(&port
->dev
, "bulkout endpoint is %d\n", port
->bulk_out_endpointAddress
);
1374 if (mos7840_port
->has_led
)
1375 mos7840_led_activity(port
);
1377 /* send it down the pipe */
1378 status
= usb_submit_urb(urb
, GFP_ATOMIC
);
1381 mos7840_port
->busy
[i
] = 0;
1382 dev_err_console(port
, "%s - usb_submit_urb(write bulk) failed "
1383 "with status = %d\n", __func__
, status
);
1384 bytes_sent
= status
;
1387 bytes_sent
= transfer_size
;
1388 port
->icount
.tx
+= transfer_size
;
1389 dev_dbg(&port
->dev
, "icount.tx is %d:\n", port
->icount
.tx
);
1395 /*****************************************************************************
1397 * this function is called by the tty driver when it wants to stop the data
1398 * being read from the port.
1399 *****************************************************************************/
1401 static void mos7840_throttle(struct tty_struct
*tty
)
1403 struct usb_serial_port
*port
= tty
->driver_data
;
1404 struct moschip_port
*mos7840_port
;
1407 if (mos7840_port_paranoia_check(port
, __func__
))
1410 mos7840_port
= mos7840_get_port_private(port
);
1412 if (mos7840_port
== NULL
)
1415 if (!mos7840_port
->open
) {
1416 dev_dbg(&port
->dev
, "%s", "port not opened\n");
1420 /* if we are implementing XON/XOFF, send the stop character */
1422 unsigned char stop_char
= STOP_CHAR(tty
);
1423 status
= mos7840_write(tty
, port
, &stop_char
, 1);
1427 /* if we are implementing RTS/CTS, toggle that line */
1428 if (C_CRTSCTS(tty
)) {
1429 mos7840_port
->shadowMCR
&= ~MCR_RTS
;
1430 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1431 mos7840_port
->shadowMCR
);
1437 /*****************************************************************************
1438 * mos7840_unthrottle
1439 * this function is called by the tty driver when it wants to resume
1440 * the data being read from the port (called after mos7840_throttle is
1442 *****************************************************************************/
1443 static void mos7840_unthrottle(struct tty_struct
*tty
)
1445 struct usb_serial_port
*port
= tty
->driver_data
;
1447 struct moschip_port
*mos7840_port
= mos7840_get_port_private(port
);
1449 if (mos7840_port_paranoia_check(port
, __func__
))
1452 if (mos7840_port
== NULL
)
1455 if (!mos7840_port
->open
) {
1456 dev_dbg(&port
->dev
, "%s - port not opened\n", __func__
);
1460 /* if we are implementing XON/XOFF, send the start character */
1462 unsigned char start_char
= START_CHAR(tty
);
1463 status
= mos7840_write(tty
, port
, &start_char
, 1);
1468 /* if we are implementing RTS/CTS, toggle that line */
1469 if (C_CRTSCTS(tty
)) {
1470 mos7840_port
->shadowMCR
|= MCR_RTS
;
1471 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1472 mos7840_port
->shadowMCR
);
1478 static int mos7840_tiocmget(struct tty_struct
*tty
)
1480 struct usb_serial_port
*port
= tty
->driver_data
;
1481 struct moschip_port
*mos7840_port
;
1482 unsigned int result
;
1486 mos7840_port
= mos7840_get_port_private(port
);
1488 if (mos7840_port
== NULL
)
1491 status
= mos7840_get_uart_reg(port
, MODEM_STATUS_REGISTER
, &msr
);
1494 status
= mos7840_get_uart_reg(port
, MODEM_CONTROL_REGISTER
, &mcr
);
1497 result
= ((mcr
& MCR_DTR
) ? TIOCM_DTR
: 0)
1498 | ((mcr
& MCR_RTS
) ? TIOCM_RTS
: 0)
1499 | ((mcr
& MCR_LOOPBACK
) ? TIOCM_LOOP
: 0)
1500 | ((msr
& MOS7840_MSR_CTS
) ? TIOCM_CTS
: 0)
1501 | ((msr
& MOS7840_MSR_CD
) ? TIOCM_CAR
: 0)
1502 | ((msr
& MOS7840_MSR_RI
) ? TIOCM_RI
: 0)
1503 | ((msr
& MOS7840_MSR_DSR
) ? TIOCM_DSR
: 0);
1505 dev_dbg(&port
->dev
, "%s - 0x%04X\n", __func__
, result
);
1510 static int mos7840_tiocmset(struct tty_struct
*tty
,
1511 unsigned int set
, unsigned int clear
)
1513 struct usb_serial_port
*port
= tty
->driver_data
;
1514 struct moschip_port
*mos7840_port
;
1518 mos7840_port
= mos7840_get_port_private(port
);
1520 if (mos7840_port
== NULL
)
1523 /* FIXME: What locks the port registers ? */
1524 mcr
= mos7840_port
->shadowMCR
;
1525 if (clear
& TIOCM_RTS
)
1527 if (clear
& TIOCM_DTR
)
1529 if (clear
& TIOCM_LOOP
)
1530 mcr
&= ~MCR_LOOPBACK
;
1532 if (set
& TIOCM_RTS
)
1534 if (set
& TIOCM_DTR
)
1536 if (set
& TIOCM_LOOP
)
1537 mcr
|= MCR_LOOPBACK
;
1539 mos7840_port
->shadowMCR
= mcr
;
1541 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, mcr
);
1543 dev_dbg(&port
->dev
, "setting MODEM_CONTROL_REGISTER Failed\n");
1550 /*****************************************************************************
1551 * mos7840_calc_baud_rate_divisor
1552 * this function calculates the proper baud rate divisor for the specified
1554 *****************************************************************************/
1555 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port
*port
,
1556 int baudRate
, int *divisor
,
1559 dev_dbg(&port
->dev
, "%s - %d\n", __func__
, baudRate
);
1561 if (baudRate
<= 115200) {
1562 *divisor
= 115200 / baudRate
;
1565 if ((baudRate
> 115200) && (baudRate
<= 230400)) {
1566 *divisor
= 230400 / baudRate
;
1567 *clk_sel_val
= 0x10;
1568 } else if ((baudRate
> 230400) && (baudRate
<= 403200)) {
1569 *divisor
= 403200 / baudRate
;
1570 *clk_sel_val
= 0x20;
1571 } else if ((baudRate
> 403200) && (baudRate
<= 460800)) {
1572 *divisor
= 460800 / baudRate
;
1573 *clk_sel_val
= 0x30;
1574 } else if ((baudRate
> 460800) && (baudRate
<= 806400)) {
1575 *divisor
= 806400 / baudRate
;
1576 *clk_sel_val
= 0x40;
1577 } else if ((baudRate
> 806400) && (baudRate
<= 921600)) {
1578 *divisor
= 921600 / baudRate
;
1579 *clk_sel_val
= 0x50;
1580 } else if ((baudRate
> 921600) && (baudRate
<= 1572864)) {
1581 *divisor
= 1572864 / baudRate
;
1582 *clk_sel_val
= 0x60;
1583 } else if ((baudRate
> 1572864) && (baudRate
<= 3145728)) {
1584 *divisor
= 3145728 / baudRate
;
1585 *clk_sel_val
= 0x70;
1590 /*****************************************************************************
1591 * mos7840_send_cmd_write_baud_rate
1592 * this function sends the proper command to change the baud rate of the
1594 *****************************************************************************/
1596 static int mos7840_send_cmd_write_baud_rate(struct moschip_port
*mos7840_port
,
1602 unsigned char number
;
1604 struct usb_serial_port
*port
;
1606 if (mos7840_port
== NULL
)
1609 port
= mos7840_port
->port
;
1610 if (mos7840_port_paranoia_check(port
, __func__
))
1613 if (mos7840_serial_paranoia_check(port
->serial
, __func__
))
1616 number
= mos7840_port
->port
->port_number
;
1618 dev_dbg(&port
->dev
, "%s - baud = %d\n", __func__
, baudRate
);
1619 /* reset clk_uart_sel in spregOffset */
1620 if (baudRate
> 115200) {
1621 #ifdef HW_flow_control
1622 /* NOTE: need to see the pther register to modify */
1623 /* setting h/w flow control bit to 1 */
1625 mos7840_port
->shadowMCR
= Data
;
1626 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1629 dev_dbg(&port
->dev
, "Writing spreg failed in set_serial_baud\n");
1635 #ifdef HW_flow_control
1636 /* setting h/w flow control bit to 0 */
1638 mos7840_port
->shadowMCR
= Data
;
1639 status
= mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
,
1642 dev_dbg(&port
->dev
, "Writing spreg failed in set_serial_baud\n");
1649 if (1) { /* baudRate <= 115200) */
1652 status
= mos7840_calc_baud_rate_divisor(port
, baudRate
, &divisor
,
1654 status
= mos7840_get_reg_sync(port
, mos7840_port
->SpRegOffset
,
1657 dev_dbg(&port
->dev
, "reading spreg failed in set_serial_baud\n");
1660 Data
= (Data
& 0x8f) | clk_sel_val
;
1661 status
= mos7840_set_reg_sync(port
, mos7840_port
->SpRegOffset
,
1664 dev_dbg(&port
->dev
, "Writing spreg failed in set_serial_baud\n");
1667 /* Calculate the Divisor */
1670 dev_err(&port
->dev
, "%s - bad baud rate\n", __func__
);
1673 /* Enable access to divisor latch */
1674 Data
= mos7840_port
->shadowLCR
| SERIAL_LCR_DLAB
;
1675 mos7840_port
->shadowLCR
= Data
;
1676 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1678 /* Write the divisor */
1679 Data
= (unsigned char)(divisor
& 0xff);
1680 dev_dbg(&port
->dev
, "set_serial_baud Value to write DLL is %x\n", Data
);
1681 mos7840_set_uart_reg(port
, DIVISOR_LATCH_LSB
, Data
);
1683 Data
= (unsigned char)((divisor
& 0xff00) >> 8);
1684 dev_dbg(&port
->dev
, "set_serial_baud Value to write DLM is %x\n", Data
);
1685 mos7840_set_uart_reg(port
, DIVISOR_LATCH_MSB
, Data
);
1687 /* Disable access to divisor latch */
1688 Data
= mos7840_port
->shadowLCR
& ~SERIAL_LCR_DLAB
;
1689 mos7840_port
->shadowLCR
= Data
;
1690 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1696 /*****************************************************************************
1697 * mos7840_change_port_settings
1698 * This routine is called to set the UART on the device to match
1699 * the specified new settings.
1700 *****************************************************************************/
1702 static void mos7840_change_port_settings(struct tty_struct
*tty
,
1703 struct moschip_port
*mos7840_port
, struct ktermios
*old_termios
)
1713 struct usb_serial_port
*port
;
1714 struct usb_serial
*serial
;
1716 if (mos7840_port
== NULL
)
1719 port
= mos7840_port
->port
;
1721 if (mos7840_port_paranoia_check(port
, __func__
))
1724 if (mos7840_serial_paranoia_check(port
->serial
, __func__
))
1727 serial
= port
->serial
;
1729 if (!mos7840_port
->open
) {
1730 dev_dbg(&port
->dev
, "%s - port not opened\n", __func__
);
1736 lParity
= LCR_PAR_NONE
;
1738 cflag
= tty
->termios
.c_cflag
;
1739 iflag
= tty
->termios
.c_iflag
;
1741 /* Change the number of bits */
1742 switch (cflag
& CSIZE
) {
1761 /* Change the Parity bit */
1762 if (cflag
& PARENB
) {
1763 if (cflag
& PARODD
) {
1764 lParity
= LCR_PAR_ODD
;
1765 dev_dbg(&port
->dev
, "%s - parity = odd\n", __func__
);
1767 lParity
= LCR_PAR_EVEN
;
1768 dev_dbg(&port
->dev
, "%s - parity = even\n", __func__
);
1772 dev_dbg(&port
->dev
, "%s - parity = none\n", __func__
);
1776 lParity
= lParity
| 0x20;
1778 /* Change the Stop bit */
1779 if (cflag
& CSTOPB
) {
1781 dev_dbg(&port
->dev
, "%s - stop bits = 2\n", __func__
);
1784 dev_dbg(&port
->dev
, "%s - stop bits = 1\n", __func__
);
1787 /* Update the LCR with the correct value */
1788 mos7840_port
->shadowLCR
&=
1789 ~(LCR_BITS_MASK
| LCR_STOP_MASK
| LCR_PAR_MASK
);
1790 mos7840_port
->shadowLCR
|= (lData
| lParity
| lStop
);
1792 dev_dbg(&port
->dev
, "%s - mos7840_port->shadowLCR is %x\n", __func__
,
1793 mos7840_port
->shadowLCR
);
1794 /* Disable Interrupts */
1796 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
1799 mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
1802 mos7840_set_uart_reg(port
, FIFO_CONTROL_REGISTER
, Data
);
1804 /* Send the updated LCR value to the mos7840 */
1805 Data
= mos7840_port
->shadowLCR
;
1807 mos7840_set_uart_reg(port
, LINE_CONTROL_REGISTER
, Data
);
1810 mos7840_port
->shadowMCR
= Data
;
1811 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
1813 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
1815 /* set up the MCR register and send it to the mos7840 */
1817 mos7840_port
->shadowMCR
= MCR_MASTER_IE
;
1819 mos7840_port
->shadowMCR
|= (MCR_DTR
| MCR_RTS
);
1821 if (cflag
& CRTSCTS
)
1822 mos7840_port
->shadowMCR
|= (MCR_XON_ANY
);
1824 mos7840_port
->shadowMCR
&= ~(MCR_XON_ANY
);
1826 Data
= mos7840_port
->shadowMCR
;
1827 mos7840_set_uart_reg(port
, MODEM_CONTROL_REGISTER
, Data
);
1829 /* Determine divisor based on baud rate */
1830 baud
= tty_get_baud_rate(tty
);
1833 /* pick a default, any default... */
1834 dev_dbg(&port
->dev
, "%s", "Picked default baud...\n");
1838 dev_dbg(&port
->dev
, "%s - baud rate = %d\n", __func__
, baud
);
1839 status
= mos7840_send_cmd_write_baud_rate(mos7840_port
, baud
);
1841 /* Enable Interrupts */
1843 mos7840_set_uart_reg(port
, INTERRUPT_ENABLE_REGISTER
, Data
);
1845 if (!mos7840_port
->read_urb_busy
) {
1846 mos7840_port
->read_urb_busy
= true;
1847 status
= usb_submit_urb(mos7840_port
->read_urb
, GFP_KERNEL
);
1849 dev_dbg(&port
->dev
, "usb_submit_urb(read bulk) failed, status = %d\n",
1851 mos7840_port
->read_urb_busy
= false;
1854 dev_dbg(&port
->dev
, "%s - mos7840_port->shadowLCR is End %x\n", __func__
,
1855 mos7840_port
->shadowLCR
);
1858 /*****************************************************************************
1859 * mos7840_set_termios
1860 * this function is called by the tty driver when it wants to change
1861 * the termios structure
1862 *****************************************************************************/
1864 static void mos7840_set_termios(struct tty_struct
*tty
,
1865 struct usb_serial_port
*port
,
1866 struct ktermios
*old_termios
)
1870 struct usb_serial
*serial
;
1871 struct moschip_port
*mos7840_port
;
1873 if (mos7840_port_paranoia_check(port
, __func__
))
1876 serial
= port
->serial
;
1878 if (mos7840_serial_paranoia_check(serial
, __func__
))
1881 mos7840_port
= mos7840_get_port_private(port
);
1883 if (mos7840_port
== NULL
)
1886 if (!mos7840_port
->open
) {
1887 dev_dbg(&port
->dev
, "%s - port not opened\n", __func__
);
1891 dev_dbg(&port
->dev
, "%s", "setting termios - \n");
1893 cflag
= tty
->termios
.c_cflag
;
1895 dev_dbg(&port
->dev
, "%s - clfag %08x iflag %08x\n", __func__
,
1896 tty
->termios
.c_cflag
, RELEVANT_IFLAG(tty
->termios
.c_iflag
));
1897 dev_dbg(&port
->dev
, "%s - old clfag %08x old iflag %08x\n", __func__
,
1898 old_termios
->c_cflag
, RELEVANT_IFLAG(old_termios
->c_iflag
));
1900 /* change the port settings to the new ones specified */
1902 mos7840_change_port_settings(tty
, mos7840_port
, old_termios
);
1904 if (!mos7840_port
->read_urb
) {
1905 dev_dbg(&port
->dev
, "%s", "URB KILLED !!!!!\n");
1909 if (!mos7840_port
->read_urb_busy
) {
1910 mos7840_port
->read_urb_busy
= true;
1911 status
= usb_submit_urb(mos7840_port
->read_urb
, GFP_KERNEL
);
1913 dev_dbg(&port
->dev
, "usb_submit_urb(read bulk) failed, status = %d\n",
1915 mos7840_port
->read_urb_busy
= false;
1920 /*****************************************************************************
1921 * mos7840_get_lsr_info - get line status register info
1923 * Purpose: Let user call ioctl() to get info when the UART physically
1924 * is emptied. On bus types like RS485, the transmitter must
1925 * release the bus after transmitting. This must be done when
1926 * the transmit shift register is empty, not be done when the
1927 * transmit holding register is empty. This functionality
1928 * allows an RS485 driver to be written in user space.
1929 *****************************************************************************/
1931 static int mos7840_get_lsr_info(struct tty_struct
*tty
,
1932 unsigned int __user
*value
)
1935 unsigned int result
= 0;
1937 count
= mos7840_chars_in_buffer(tty
);
1939 result
= TIOCSER_TEMT
;
1941 if (copy_to_user(value
, &result
, sizeof(int)))
1946 /*****************************************************************************
1947 * mos7840_get_serial_info
1948 * function to get information about serial port
1949 *****************************************************************************/
1951 static int mos7840_get_serial_info(struct moschip_port
*mos7840_port
,
1952 struct serial_struct __user
*retinfo
)
1954 struct serial_struct tmp
;
1956 if (mos7840_port
== NULL
)
1962 memset(&tmp
, 0, sizeof(tmp
));
1964 tmp
.type
= PORT_16550A
;
1965 tmp
.line
= mos7840_port
->port
->minor
;
1966 tmp
.port
= mos7840_port
->port
->port_number
;
1968 tmp
.flags
= ASYNC_SKIP_TEST
| ASYNC_AUTO_IRQ
;
1969 tmp
.xmit_fifo_size
= NUM_URBS
* URB_TRANSFER_BUFFER_SIZE
;
1970 tmp
.baud_base
= 9600;
1971 tmp
.close_delay
= 5 * HZ
;
1972 tmp
.closing_wait
= 30 * HZ
;
1974 if (copy_to_user(retinfo
, &tmp
, sizeof(*retinfo
)))
1979 /*****************************************************************************
1981 * this function handles any ioctl calls to the driver
1982 *****************************************************************************/
1984 static int mos7840_ioctl(struct tty_struct
*tty
,
1985 unsigned int cmd
, unsigned long arg
)
1987 struct usb_serial_port
*port
= tty
->driver_data
;
1988 void __user
*argp
= (void __user
*)arg
;
1989 struct moschip_port
*mos7840_port
;
1991 if (mos7840_port_paranoia_check(port
, __func__
))
1994 mos7840_port
= mos7840_get_port_private(port
);
1996 if (mos7840_port
== NULL
)
2000 /* return number of bytes available */
2003 dev_dbg(&port
->dev
, "%s TIOCSERGETLSR\n", __func__
);
2004 return mos7840_get_lsr_info(tty
, argp
);
2007 dev_dbg(&port
->dev
, "%s TIOCGSERIAL\n", __func__
);
2008 return mos7840_get_serial_info(mos7840_port
, argp
);
2011 dev_dbg(&port
->dev
, "%s TIOCSSERIAL\n", __func__
);
2016 return -ENOIOCTLCMD
;
2019 static int mos7810_check(struct usb_serial
*serial
)
2021 int i
, pass_count
= 0;
2023 __u16 data
= 0, mcr_data
= 0;
2024 __u16 test_pattern
= 0x55AA;
2027 buf
= kmalloc(VENDOR_READ_LENGTH
, GFP_KERNEL
);
2029 return 0; /* failed to identify 7810 */
2031 /* Store MCR setting */
2032 res
= usb_control_msg(serial
->dev
, usb_rcvctrlpipe(serial
->dev
, 0),
2033 MCS_RDREQ
, MCS_RD_RTYPE
, 0x0300, MODEM_CONTROL_REGISTER
,
2034 buf
, VENDOR_READ_LENGTH
, MOS_WDR_TIMEOUT
);
2035 if (res
== VENDOR_READ_LENGTH
)
2038 for (i
= 0; i
< 16; i
++) {
2039 /* Send the 1-bit test pattern out to MCS7810 test pin */
2040 usb_control_msg(serial
->dev
, usb_sndctrlpipe(serial
->dev
, 0),
2041 MCS_WRREQ
, MCS_WR_RTYPE
,
2042 (0x0300 | (((test_pattern
>> i
) & 0x0001) << 1)),
2043 MODEM_CONTROL_REGISTER
, NULL
, 0, MOS_WDR_TIMEOUT
);
2045 /* Read the test pattern back */
2046 res
= usb_control_msg(serial
->dev
,
2047 usb_rcvctrlpipe(serial
->dev
, 0), MCS_RDREQ
,
2048 MCS_RD_RTYPE
, 0, GPIO_REGISTER
, buf
,
2049 VENDOR_READ_LENGTH
, MOS_WDR_TIMEOUT
);
2050 if (res
== VENDOR_READ_LENGTH
)
2053 /* If this is a MCS7810 device, both test patterns must match */
2054 if (((test_pattern
>> i
) ^ (~data
>> 1)) & 0x0001)
2060 /* Restore MCR setting */
2061 usb_control_msg(serial
->dev
, usb_sndctrlpipe(serial
->dev
, 0), MCS_WRREQ
,
2062 MCS_WR_RTYPE
, 0x0300 | mcr_data
, MODEM_CONTROL_REGISTER
, NULL
,
2063 0, MOS_WDR_TIMEOUT
);
2067 if (pass_count
== 16)
2073 static int mos7840_probe(struct usb_serial
*serial
,
2074 const struct usb_device_id
*id
)
2076 u16 product
= le16_to_cpu(serial
->dev
->descriptor
.idProduct
);
2080 if (product
== MOSCHIP_DEVICE_ID_7810
||
2081 product
== MOSCHIP_DEVICE_ID_7820
) {
2082 device_type
= product
;
2086 buf
= kzalloc(VENDOR_READ_LENGTH
, GFP_KERNEL
);
2090 usb_control_msg(serial
->dev
, usb_rcvctrlpipe(serial
->dev
, 0),
2091 MCS_RDREQ
, MCS_RD_RTYPE
, 0, GPIO_REGISTER
, buf
,
2092 VENDOR_READ_LENGTH
, MOS_WDR_TIMEOUT
);
2094 /* For a MCS7840 device GPIO0 must be set to 1 */
2096 device_type
= MOSCHIP_DEVICE_ID_7840
;
2097 else if (mos7810_check(serial
))
2098 device_type
= MOSCHIP_DEVICE_ID_7810
;
2100 device_type
= MOSCHIP_DEVICE_ID_7820
;
2104 usb_set_serial_data(serial
, (void *)(unsigned long)device_type
);
2109 static int mos7840_calc_num_ports(struct usb_serial
*serial
)
2111 int device_type
= (unsigned long)usb_get_serial_data(serial
);
2112 int mos7840_num_ports
;
2114 mos7840_num_ports
= (device_type
>> 4) & 0x000F;
2116 return mos7840_num_ports
;
2119 static int mos7840_port_probe(struct usb_serial_port
*port
)
2121 struct usb_serial
*serial
= port
->serial
;
2122 int device_type
= (unsigned long)usb_get_serial_data(serial
);
2123 struct moschip_port
*mos7840_port
;
2128 /* we set up the pointers to the endpoints in the mos7840_open *
2129 * function, as the structures aren't created yet. */
2131 pnum
= port
->port_number
;
2133 dev_dbg(&port
->dev
, "mos7840_startup: configuring port %d\n", pnum
);
2134 mos7840_port
= kzalloc(sizeof(struct moschip_port
), GFP_KERNEL
);
2138 /* Initialize all port interrupt end point to port 0 int
2139 * endpoint. Our device has only one interrupt end point
2140 * common to all port */
2142 mos7840_port
->port
= port
;
2143 mos7840_set_port_private(port
, mos7840_port
);
2144 spin_lock_init(&mos7840_port
->pool_lock
);
2146 /* minor is not initialised until later by
2147 * usb-serial.c:get_free_serial() and cannot therefore be used
2148 * to index device instances */
2149 mos7840_port
->port_num
= pnum
+ 1;
2150 dev_dbg(&port
->dev
, "port->minor = %d\n", port
->minor
);
2151 dev_dbg(&port
->dev
, "mos7840_port->port_num = %d\n", mos7840_port
->port_num
);
2153 if (mos7840_port
->port_num
== 1) {
2154 mos7840_port
->SpRegOffset
= 0x0;
2155 mos7840_port
->ControlRegOffset
= 0x1;
2156 mos7840_port
->DcrRegOffset
= 0x4;
2157 } else if ((mos7840_port
->port_num
== 2) && (serial
->num_ports
== 4)) {
2158 mos7840_port
->SpRegOffset
= 0x8;
2159 mos7840_port
->ControlRegOffset
= 0x9;
2160 mos7840_port
->DcrRegOffset
= 0x16;
2161 } else if ((mos7840_port
->port_num
== 2) && (serial
->num_ports
== 2)) {
2162 mos7840_port
->SpRegOffset
= 0xa;
2163 mos7840_port
->ControlRegOffset
= 0xb;
2164 mos7840_port
->DcrRegOffset
= 0x19;
2165 } else if ((mos7840_port
->port_num
== 3) && (serial
->num_ports
== 4)) {
2166 mos7840_port
->SpRegOffset
= 0xa;
2167 mos7840_port
->ControlRegOffset
= 0xb;
2168 mos7840_port
->DcrRegOffset
= 0x19;
2169 } else if ((mos7840_port
->port_num
== 4) && (serial
->num_ports
== 4)) {
2170 mos7840_port
->SpRegOffset
= 0xc;
2171 mos7840_port
->ControlRegOffset
= 0xd;
2172 mos7840_port
->DcrRegOffset
= 0x1c;
2174 mos7840_dump_serial_port(port
, mos7840_port
);
2175 mos7840_set_port_private(port
, mos7840_port
);
2177 /* enable rx_disable bit in control register */
2178 status
= mos7840_get_reg_sync(port
,
2179 mos7840_port
->ControlRegOffset
, &Data
);
2181 dev_dbg(&port
->dev
, "Reading ControlReg failed status-0x%x\n", status
);
2184 dev_dbg(&port
->dev
, "ControlReg Reading success val is %x, status%d\n", Data
, status
);
2185 Data
|= 0x08; /* setting driver done bit */
2186 Data
|= 0x04; /* sp1_bit to have cts change reflect in
2189 /* Data |= 0x20; //rx_disable bit */
2190 status
= mos7840_set_reg_sync(port
,
2191 mos7840_port
->ControlRegOffset
, Data
);
2193 dev_dbg(&port
->dev
, "Writing ControlReg failed(rx_disable) status-0x%x\n", status
);
2196 dev_dbg(&port
->dev
, "ControlReg Writing success(rx_disable) status%d\n", status
);
2198 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2201 status
= mos7840_set_reg_sync(port
,
2202 (__u16
) (mos7840_port
->DcrRegOffset
+ 0), Data
);
2204 dev_dbg(&port
->dev
, "Writing DCR0 failed status-0x%x\n", status
);
2207 dev_dbg(&port
->dev
, "DCR0 Writing success status%d\n", status
);
2210 status
= mos7840_set_reg_sync(port
,
2211 (__u16
) (mos7840_port
->DcrRegOffset
+ 1), Data
);
2213 dev_dbg(&port
->dev
, "Writing DCR1 failed status-0x%x\n", status
);
2216 dev_dbg(&port
->dev
, "DCR1 Writing success status%d\n", status
);
2219 status
= mos7840_set_reg_sync(port
,
2220 (__u16
) (mos7840_port
->DcrRegOffset
+ 2), Data
);
2222 dev_dbg(&port
->dev
, "Writing DCR2 failed status-0x%x\n", status
);
2225 dev_dbg(&port
->dev
, "DCR2 Writing success status%d\n", status
);
2227 /* write values in clkstart0x0 and clkmulti 0x20 */
2229 status
= mos7840_set_reg_sync(port
, CLK_START_VALUE_REGISTER
, Data
);
2231 dev_dbg(&port
->dev
, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status
);
2234 dev_dbg(&port
->dev
, "CLK_START_VALUE_REGISTER Writing success status%d\n", status
);
2237 status
= mos7840_set_reg_sync(port
, CLK_MULTI_REGISTER
, Data
);
2239 dev_dbg(&port
->dev
, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status
);
2242 dev_dbg(&port
->dev
, "CLK_MULTI_REGISTER Writing success status%d\n", status
);
2244 /* write value 0x0 to scratchpad register */
2246 status
= mos7840_set_uart_reg(port
, SCRATCH_PAD_REGISTER
, Data
);
2248 dev_dbg(&port
->dev
, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status
);
2251 dev_dbg(&port
->dev
, "SCRATCH_PAD_REGISTER Writing success status%d\n", status
);
2253 /* Zero Length flag register */
2254 if ((mos7840_port
->port_num
!= 1) && (serial
->num_ports
== 2)) {
2256 status
= mos7840_set_reg_sync(port
,
2258 ((__u16
)mos7840_port
->port_num
)), Data
);
2259 dev_dbg(&port
->dev
, "ZLIP offset %x\n",
2260 (__u16
)(ZLP_REG1
+ ((__u16
) mos7840_port
->port_num
)));
2262 dev_dbg(&port
->dev
, "Writing ZLP_REG%d failed status-0x%x\n", pnum
+ 2, status
);
2265 dev_dbg(&port
->dev
, "ZLP_REG%d Writing success status%d\n", pnum
+ 2, status
);
2268 status
= mos7840_set_reg_sync(port
,
2270 ((__u16
)mos7840_port
->port_num
) - 0x1), Data
);
2271 dev_dbg(&port
->dev
, "ZLIP offset %x\n",
2272 (__u16
)(ZLP_REG1
+ ((__u16
) mos7840_port
->port_num
) - 0x1));
2274 dev_dbg(&port
->dev
, "Writing ZLP_REG%d failed status-0x%x\n", pnum
+ 1, status
);
2277 dev_dbg(&port
->dev
, "ZLP_REG%d Writing success status%d\n", pnum
+ 1, status
);
2280 mos7840_port
->control_urb
= usb_alloc_urb(0, GFP_KERNEL
);
2281 mos7840_port
->ctrl_buf
= kmalloc(16, GFP_KERNEL
);
2282 mos7840_port
->dr
= kmalloc(sizeof(struct usb_ctrlrequest
),
2284 if (!mos7840_port
->control_urb
|| !mos7840_port
->ctrl_buf
||
2285 !mos7840_port
->dr
) {
2290 mos7840_port
->has_led
= false;
2292 /* Initialize LED timers */
2293 if (device_type
== MOSCHIP_DEVICE_ID_7810
) {
2294 mos7840_port
->has_led
= true;
2296 mos7840_port
->led_urb
= usb_alloc_urb(0, GFP_KERNEL
);
2297 mos7840_port
->led_dr
= kmalloc(sizeof(*mos7840_port
->led_dr
),
2299 if (!mos7840_port
->led_urb
|| !mos7840_port
->led_dr
) {
2304 setup_timer(&mos7840_port
->led_timer1
, mos7840_led_off
,
2305 (unsigned long)mos7840_port
);
2306 mos7840_port
->led_timer1
.expires
=
2307 jiffies
+ msecs_to_jiffies(LED_ON_MS
);
2308 setup_timer(&mos7840_port
->led_timer2
, mos7840_led_flag_off
,
2309 (unsigned long)mos7840_port
);
2310 mos7840_port
->led_timer2
.expires
=
2311 jiffies
+ msecs_to_jiffies(LED_OFF_MS
);
2314 mos7840_set_led_sync(port
, MODEM_CONTROL_REGISTER
, 0x0300);
2317 if (pnum
== serial
->num_ports
- 1) {
2318 /* Zero Length flag enable */
2320 status
= mos7840_set_reg_sync(serial
->port
[0], ZLP_REG5
, Data
);
2322 dev_dbg(&port
->dev
, "Writing ZLP_REG5 failed status-0x%x\n", status
);
2325 dev_dbg(&port
->dev
, "ZLP_REG5 Writing success status%d\n", status
);
2327 /* setting configuration feature to one */
2328 usb_control_msg(serial
->dev
, usb_sndctrlpipe(serial
->dev
, 0),
2329 0x03, 0x00, 0x01, 0x00, NULL
, 0x00,
2334 kfree(mos7840_port
->led_dr
);
2335 usb_free_urb(mos7840_port
->led_urb
);
2336 kfree(mos7840_port
->dr
);
2337 kfree(mos7840_port
->ctrl_buf
);
2338 usb_free_urb(mos7840_port
->control_urb
);
2339 kfree(mos7840_port
);
2344 static int mos7840_port_remove(struct usb_serial_port
*port
)
2346 struct moschip_port
*mos7840_port
;
2348 mos7840_port
= mos7840_get_port_private(port
);
2350 if (mos7840_port
->has_led
) {
2352 mos7840_set_led_sync(port
, MODEM_CONTROL_REGISTER
, 0x0300);
2354 del_timer_sync(&mos7840_port
->led_timer1
);
2355 del_timer_sync(&mos7840_port
->led_timer2
);
2357 usb_kill_urb(mos7840_port
->led_urb
);
2358 usb_free_urb(mos7840_port
->led_urb
);
2359 kfree(mos7840_port
->led_dr
);
2361 usb_kill_urb(mos7840_port
->control_urb
);
2362 usb_free_urb(mos7840_port
->control_urb
);
2363 kfree(mos7840_port
->ctrl_buf
);
2364 kfree(mos7840_port
->dr
);
2365 kfree(mos7840_port
);
2370 static struct usb_serial_driver moschip7840_4port_device
= {
2372 .owner
= THIS_MODULE
,
2375 .description
= DRIVER_DESC
,
2376 .id_table
= id_table
,
2378 .open
= mos7840_open
,
2379 .close
= mos7840_close
,
2380 .write
= mos7840_write
,
2381 .write_room
= mos7840_write_room
,
2382 .chars_in_buffer
= mos7840_chars_in_buffer
,
2383 .throttle
= mos7840_throttle
,
2384 .unthrottle
= mos7840_unthrottle
,
2385 .calc_num_ports
= mos7840_calc_num_ports
,
2386 .probe
= mos7840_probe
,
2387 .ioctl
= mos7840_ioctl
,
2388 .set_termios
= mos7840_set_termios
,
2389 .break_ctl
= mos7840_break
,
2390 .tiocmget
= mos7840_tiocmget
,
2391 .tiocmset
= mos7840_tiocmset
,
2392 .tiocmiwait
= usb_serial_generic_tiocmiwait
,
2393 .get_icount
= usb_serial_generic_get_icount
,
2394 .port_probe
= mos7840_port_probe
,
2395 .port_remove
= mos7840_port_remove
,
2396 .read_bulk_callback
= mos7840_bulk_in_callback
,
2397 .read_int_callback
= mos7840_interrupt_callback
,
2400 static struct usb_serial_driver
* const serial_drivers
[] = {
2401 &moschip7840_4port_device
, NULL
2404 module_usb_serial_driver(serial_drivers
, id_table
);
2406 MODULE_DESCRIPTION(DRIVER_DESC
);
2407 MODULE_LICENSE("GPL");