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 "1.3.1"
42 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
45 * 16C50 UART register defines
48 #define LCR_BITS_5 0x00 /* 5 bits/char */
49 #define LCR_BITS_6 0x01 /* 6 bits/char */
50 #define LCR_BITS_7 0x02 /* 7 bits/char */
51 #define LCR_BITS_8 0x03 /* 8 bits/char */
52 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
54 #define LCR_STOP_1 0x00 /* 1 stop bit */
55 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
56 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
57 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
59 #define LCR_PAR_NONE 0x00 /* No parity */
60 #define LCR_PAR_ODD 0x08 /* Odd parity */
61 #define LCR_PAR_EVEN 0x18 /* Even parity */
62 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
63 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
64 #define LCR_PAR_MASK 0x38 /* Mask for parity field */
66 #define LCR_SET_BREAK 0x40 /* Set Break condition */
67 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
69 #define MCR_DTR 0x01 /* Assert DTR */
70 #define MCR_RTS 0x02 /* Assert RTS */
71 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
72 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
73 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
74 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
76 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
77 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
78 #define MOS7840_MSR_RI 0x40 /* Current state of RI */
79 #define MOS7840_MSR_CD 0x80 /* Current state of CD */
82 * Defines used for sending commands to port
85 #define WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */
86 #define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */
88 #define MOS_PORT1 0x0200
89 #define MOS_PORT2 0x0300
90 #define MOS_VENREG 0x0000
91 #define MOS_MAX_PORT 0x02
92 #define MOS_WRITE 0x0E
96 #define MCS_RD_RTYPE 0xC0
97 #define MCS_WR_RTYPE 0x40
98 #define MCS_RDREQ 0x0D
99 #define MCS_WRREQ 0x0E
100 #define MCS_CTRL_TIMEOUT 500
101 #define VENDOR_READ_LENGTH (0x01)
103 #define MAX_NAME_LEN 64
105 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
106 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
108 /* For higher baud Rates use TIOCEXBAUD */
109 #define TIOCEXBAUD 0x5462
111 /* vendor id and device id defines */
113 /* The native mos7840/7820 component */
114 #define USB_VENDOR_ID_MOSCHIP 0x9710
115 #define MOSCHIP_DEVICE_ID_7840 0x7840
116 #define MOSCHIP_DEVICE_ID_7820 0x7820
117 /* The native component can have its vendor/device id's overridden
118 * in vendor-specific implementations. Such devices can be handled
119 * by making a change here, in moschip_port_id_table, and in
120 * moschip_id_table_combined
122 #define USB_VENDOR_ID_BANDB 0x0856
123 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
124 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
126 /* Interrupt Routine Defines */
128 #define SERIAL_IIR_RLS 0x06
129 #define SERIAL_IIR_MS 0x00
132 * Emulation of the bit mask on the LINE STATUS REGISTER.
134 #define SERIAL_LSR_DR 0x0001
135 #define SERIAL_LSR_OE 0x0002
136 #define SERIAL_LSR_PE 0x0004
137 #define SERIAL_LSR_FE 0x0008
138 #define SERIAL_LSR_BI 0x0010
140 #define MOS_MSR_DELTA_CTS 0x10
141 #define MOS_MSR_DELTA_DSR 0x20
142 #define MOS_MSR_DELTA_RI 0x40
143 #define MOS_MSR_DELTA_CD 0x80
145 /* Serial Port register Address */
146 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
147 #define FIFO_CONTROL_REGISTER ((__u16)(0x02))
148 #define LINE_CONTROL_REGISTER ((__u16)(0x03))
149 #define MODEM_CONTROL_REGISTER ((__u16)(0x04))
150 #define LINE_STATUS_REGISTER ((__u16)(0x05))
151 #define MODEM_STATUS_REGISTER ((__u16)(0x06))
152 #define SCRATCH_PAD_REGISTER ((__u16)(0x07))
153 #define DIVISOR_LATCH_LSB ((__u16)(0x00))
154 #define DIVISOR_LATCH_MSB ((__u16)(0x01))
156 #define CLK_MULTI_REGISTER ((__u16)(0x02))
157 #define CLK_START_VALUE_REGISTER ((__u16)(0x03))
159 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
162 * URB POOL related defines
164 #define NUM_URBS 16 /* URB Count */
165 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
168 static struct usb_device_id moschip_port_id_table[] = {
169 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
170 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
171 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
172 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
173 {} /* terminating entry */
176 static __devinitdata struct usb_device_id moschip_id_table_combined[] = {
177 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
178 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
179 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
180 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
181 {} /* terminating entry */
184 MODULE_DEVICE_TABLE(usb, moschip_id_table_combined);
186 /* This structure holds all of the local port information */
188 struct moschip_port {
189 int port_num; /*Actual port number in the device(1,2,etc) */
190 struct urb *write_urb; /* write URB for this port */
191 struct urb *read_urb; /* read URB for this port */
193 __u8 shadowLCR; /* last LCR value received */
194 __u8 shadowMCR; /* last MCR value received */
198 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
199 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
201 struct async_icount icount;
202 struct usb_serial_port *port; /* loop back to the owner of this object */
206 __u8 ControlRegOffset;
208 /* for processing control URBS in interrupt context */
209 struct urb *control_urb;
210 struct usb_ctrlrequest *dr;
214 spinlock_t pool_lock;
215 struct urb *write_urb_pool[NUM_URBS];
223 * mos7840_set_reg_sync
224 * To set the Control register by calling usb_fill_control_urb function
225 * by passing usb_sndctrlpipe function as parameter.
228 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
231 struct usb_device *dev = port->serial->dev;
233 dbg("mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
235 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
236 MCS_WR_RTYPE, val, reg, NULL, 0,
241 * mos7840_get_reg_sync
242 * To set the Uart register by calling usb_fill_control_urb function by
243 * passing usb_rcvctrlpipe function as parameter.
246 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
249 struct usb_device *dev = port->serial->dev;
252 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
253 MCS_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH,
255 dbg("mos7840_get_reg_sync offset is %x, return val %x\n", reg, *val);
256 *val = (*val) & 0x00ff;
261 * mos7840_set_uart_reg
262 * To set the Uart register by calling usb_fill_control_urb function by
263 * passing usb_sndctrlpipe function as parameter.
266 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
270 struct usb_device *dev = port->serial->dev;
272 /* For the UART control registers, the application number need
274 if (port->serial->num_ports == 4) {
275 val |= (((__u16) port->number -
276 (__u16) (port->serial->minor)) + 1) << 8;
277 dbg("mos7840_set_uart_reg application number is %x\n", val);
279 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
280 val |= (((__u16) port->number -
281 (__u16) (port->serial->minor)) + 1) << 8;
282 dbg("mos7840_set_uart_reg application number is %x\n",
286 (((__u16) port->number -
287 (__u16) (port->serial->minor)) + 2) << 8;
288 dbg("mos7840_set_uart_reg application number is %x\n",
292 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
293 MCS_WR_RTYPE, val, reg, NULL, 0,
299 * mos7840_get_uart_reg
300 * To set the Control register by calling usb_fill_control_urb function
301 * by passing usb_rcvctrlpipe function as parameter.
303 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
306 struct usb_device *dev = port->serial->dev;
310 /* dbg("application number is %4x \n",
311 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
312 /* Wval is same as application number */
313 if (port->serial->num_ports == 4) {
315 (((__u16) port->number - (__u16) (port->serial->minor)) +
317 dbg("mos7840_get_uart_reg application number is %x\n", Wval);
319 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
320 Wval = (((__u16) port->number -
321 (__u16) (port->serial->minor)) + 1) << 8;
322 dbg("mos7840_get_uart_reg application number is %x\n",
325 Wval = (((__u16) port->number -
326 (__u16) (port->serial->minor)) + 2) << 8;
327 dbg("mos7840_get_uart_reg application number is %x\n",
331 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
332 MCS_RD_RTYPE, Wval, reg, val, VENDOR_READ_LENGTH,
334 *val = (*val) & 0x00ff;
338 static void mos7840_dump_serial_port(struct moschip_port *mos7840_port)
341 dbg("***************************************\n");
342 dbg("SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
343 dbg("ControlRegOffset is %2x \n", mos7840_port->ControlRegOffset);
344 dbg("DCRRegOffset is %2x \n", mos7840_port->DcrRegOffset);
345 dbg("***************************************\n");
349 /************************************************************************/
350 /************************************************************************/
351 /* I N T E R F A C E F U N C T I O N S */
352 /* I N T E R F A C E F U N C T I O N S */
353 /************************************************************************/
354 /************************************************************************/
356 static inline void mos7840_set_port_private(struct usb_serial_port *port,
357 struct moschip_port *data)
359 usb_set_serial_port_data(port, (void *)data);
362 static inline struct moschip_port *mos7840_get_port_private(struct
366 return (struct moschip_port *)usb_get_serial_port_data(port);
369 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
371 struct moschip_port *mos7840_port;
372 struct async_icount *icount;
374 icount = &mos7840_port->icount;
376 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
378 icount = &mos7840_port->icount;
380 /* update input line counters */
381 if (new_msr & MOS_MSR_DELTA_CTS) {
385 if (new_msr & MOS_MSR_DELTA_DSR) {
389 if (new_msr & MOS_MSR_DELTA_CD) {
393 if (new_msr & MOS_MSR_DELTA_RI) {
400 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
402 struct async_icount *icount;
404 dbg("%s - %02x", __func__, new_lsr);
406 if (new_lsr & SERIAL_LSR_BI) {
408 * Parity and Framing errors only count if they
409 * occur exclusive of a break being
412 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
415 /* update input line counters */
416 icount = &port->icount;
417 if (new_lsr & SERIAL_LSR_BI) {
421 if (new_lsr & SERIAL_LSR_OE) {
425 if (new_lsr & SERIAL_LSR_PE) {
429 if (new_lsr & SERIAL_LSR_FE) {
435 /************************************************************************/
436 /************************************************************************/
437 /* U S B C A L L B A C K F U N C T I O N S */
438 /* U S B C A L L B A C K F U N C T I O N S */
439 /************************************************************************/
440 /************************************************************************/
442 static void mos7840_control_callback(struct urb *urb)
445 struct moschip_port *mos7840_port;
448 int status = urb->status;
450 mos7840_port = urb->context;
459 /* this urb is terminated, clean up */
460 dbg("%s - urb shutting down with status: %d", __func__,
464 dbg("%s - nonzero urb status received: %d", __func__,
469 dbg("%s urb buffer size is %d\n", __func__, urb->actual_length);
470 dbg("%s mos7840_port->MsrLsr is %d port %d\n", __func__,
471 mos7840_port->MsrLsr, mos7840_port->port_num);
472 data = urb->transfer_buffer;
473 regval = (__u8) data[0];
474 dbg("%s data is %x\n", __func__, regval);
475 if (mos7840_port->MsrLsr == 0)
476 mos7840_handle_new_msr(mos7840_port, regval);
477 else if (mos7840_port->MsrLsr == 1)
478 mos7840_handle_new_lsr(mos7840_port, regval);
481 spin_lock(&mos7840_port->pool_lock);
482 if (!mos7840_port->zombie)
483 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC);
484 spin_unlock(&mos7840_port->pool_lock);
486 dev_err(&urb->dev->dev,
487 "%s - Error %d submitting interrupt urb\n",
492 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
495 struct usb_device *dev = mcs->port->serial->dev;
496 struct usb_ctrlrequest *dr = mcs->dr;
497 unsigned char *buffer = mcs->ctrl_buf;
500 dr->bRequestType = MCS_RD_RTYPE;
501 dr->bRequest = MCS_RDREQ;
502 dr->wValue = cpu_to_le16(Wval); /* 0 */
503 dr->wIndex = cpu_to_le16(reg);
504 dr->wLength = cpu_to_le16(2);
506 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
507 (unsigned char *)dr, buffer, 2,
508 mos7840_control_callback, mcs);
509 mcs->control_urb->transfer_buffer_length = 2;
510 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
514 /*****************************************************************************
515 * mos7840_interrupt_callback
516 * this is the callback function for when we have received data on the
517 * interrupt endpoint.
518 *****************************************************************************/
520 static void mos7840_interrupt_callback(struct urb *urb)
524 struct moschip_port *mos7840_port;
525 struct usb_serial *serial;
530 __u16 wval, wreg = 0;
531 int status = urb->status;
533 dbg("%s", " : Entering\n");
542 /* this urb is terminated, clean up */
543 dbg("%s - urb shutting down with status: %d", __func__,
547 dbg("%s - nonzero urb status received: %d", __func__,
552 length = urb->actual_length;
553 data = urb->transfer_buffer;
555 serial = urb->context;
557 /* Moschip get 5 bytes
558 * Byte 1 IIR Port 1 (port.number is 0)
559 * Byte 2 IIR Port 2 (port.number is 1)
560 * Byte 3 IIR Port 3 (port.number is 2)
561 * Byte 4 IIR Port 4 (port.number is 3)
562 * Byte 5 FIFO status for both */
564 if (length && length > 5) {
565 dbg("%s \n", "Wrong data !!!");
569 sp[0] = (__u8) data[0];
570 sp[1] = (__u8) data[1];
571 sp[2] = (__u8) data[2];
572 sp[3] = (__u8) data[3];
575 for (i = 0; i < serial->num_ports; i++) {
576 mos7840_port = mos7840_get_port_private(serial->port[i]);
578 (((__u16) serial->port[i]->number -
579 (__u16) (serial->minor)) + 1) << 8;
580 if (mos7840_port->open) {
582 dbg("SP%d No Interrupt !!!\n", i);
584 switch (sp[i] & 0x0f) {
586 dbg("Serial Port %d: Receiver status error or ", i);
587 dbg("address bit detected in 9-bit mode\n");
588 mos7840_port->MsrLsr = 1;
589 wreg = LINE_STATUS_REGISTER;
592 dbg("Serial Port %d: Modem status change\n", i);
593 mos7840_port->MsrLsr = 0;
594 wreg = MODEM_STATUS_REGISTER;
597 spin_lock(&mos7840_port->pool_lock);
598 if (!mos7840_port->zombie) {
599 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
601 spin_unlock(&mos7840_port->pool_lock);
604 spin_unlock(&mos7840_port->pool_lock);
609 /* the completion handler for the control urb will resubmit */
612 result = usb_submit_urb(urb, GFP_ATOMIC);
614 dev_err(&urb->dev->dev,
615 "%s - Error %d submitting interrupt urb\n",
620 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
621 const char *function)
624 dbg("%s - port == NULL", function);
628 dbg("%s - port->serial == NULL", function);
635 /* Inline functions to check the sanity of a pointer that is passed to us */
636 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
637 const char *function)
640 dbg("%s - serial == NULL", function);
644 dbg("%s - serial->type == NULL!", function);
651 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
652 const char *function)
654 /* if no port was specified, or it fails a paranoia check */
656 mos7840_port_paranoia_check(port, function) ||
657 mos7840_serial_paranoia_check(port->serial, function)) {
658 /* then say that we don't have a valid usb_serial thing,
659 * which will end up genrating -ENODEV return values */
666 /*****************************************************************************
667 * mos7840_bulk_in_callback
668 * this is the callback function for when we have received data on the
670 *****************************************************************************/
672 static void mos7840_bulk_in_callback(struct urb *urb)
676 struct usb_serial *serial;
677 struct usb_serial_port *port;
678 struct moschip_port *mos7840_port;
679 struct tty_struct *tty;
680 int status = urb->status;
683 dbg("nonzero read bulk status received: %d", status);
687 mos7840_port = urb->context;
689 dbg("%s", "NULL mos7840_port pointer \n");
693 port = (struct usb_serial_port *)mos7840_port->port;
694 if (mos7840_port_paranoia_check(port, __func__)) {
695 dbg("%s", "Port Paranoia failed \n");
699 serial = mos7840_get_usb_serial(port, __func__);
701 dbg("%s\n", "Bad serial pointer ");
705 dbg("%s\n", "Entering... \n");
707 data = urb->transfer_buffer;
709 dbg("%s", "Entering ........... \n");
711 if (urb->actual_length) {
712 tty = mos7840_port->port->port.tty;
714 tty_buffer_request_room(tty, urb->actual_length);
715 tty_insert_flip_string(tty, data, urb->actual_length);
717 tty_flip_buffer_push(tty);
719 mos7840_port->icount.rx += urb->actual_length;
721 dbg("mos7840_port->icount.rx is %d:\n",
722 mos7840_port->icount.rx);
725 if (!mos7840_port->read_urb) {
726 dbg("%s", "URB KILLED !!!\n");
731 mos7840_port->read_urb->dev = serial->dev;
733 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
736 dbg(" usb_submit_urb(read bulk) failed, retval = %d",
741 /*****************************************************************************
742 * mos7840_bulk_out_data_callback
743 * this is the callback function for when we have finished sending
744 * serial data on the bulk out endpoint.
745 *****************************************************************************/
747 static void mos7840_bulk_out_data_callback(struct urb *urb)
749 struct moschip_port *mos7840_port;
750 struct tty_struct *tty;
751 int status = urb->status;
754 mos7840_port = urb->context;
755 spin_lock(&mos7840_port->pool_lock);
756 for (i = 0; i < NUM_URBS; i++) {
757 if (urb == mos7840_port->write_urb_pool[i]) {
758 mos7840_port->busy[i] = 0;
762 spin_unlock(&mos7840_port->pool_lock);
765 dbg("nonzero write bulk status received:%d\n", status);
769 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) {
770 dbg("%s", "Port Paranoia failed \n");
774 dbg("%s \n", "Entering .........");
776 tty = mos7840_port->port->port.tty;
778 if (tty && mos7840_port->open)
783 /************************************************************************/
784 /* 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 */
785 /************************************************************************/
786 #ifdef MCSSerialProbe
787 static int mos7840_serial_probe(struct usb_serial *serial,
788 const struct usb_device_id *id)
791 /*need to implement the mode_reg reading and updating\
792 structures usb_serial_ device_type\
793 (i.e num_ports, num_bulkin,bulkout etc) */
794 /* Also we can update the changes attach */
799 /*****************************************************************************
801 * this function is called by the tty driver when a port is opened
802 * If successful, we return 0
803 * Otherwise we return a negative error number.
804 *****************************************************************************/
806 static int mos7840_open(struct tty_struct *tty,
807 struct usb_serial_port *port, struct file *filp)
811 struct usb_serial *serial;
815 struct moschip_port *mos7840_port;
816 struct moschip_port *port0;
818 if (mos7840_port_paranoia_check(port, __func__)) {
819 dbg("%s", "Port Paranoia failed \n");
823 serial = port->serial;
825 if (mos7840_serial_paranoia_check(serial, __func__)) {
826 dbg("%s", "Serial Paranoia failed \n");
830 mos7840_port = mos7840_get_port_private(port);
831 port0 = mos7840_get_port_private(serial->port[0]);
833 if (mos7840_port == NULL || port0 == NULL)
836 usb_clear_halt(serial->dev, port->write_urb->pipe);
837 usb_clear_halt(serial->dev, port->read_urb->pipe);
840 /* Initialising the write urb pool */
841 for (j = 0; j < NUM_URBS; ++j) {
842 urb = usb_alloc_urb(0, GFP_KERNEL);
843 mos7840_port->write_urb_pool[j] = urb;
846 err("No more urbs???");
850 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
852 if (!urb->transfer_buffer) {
854 mos7840_port->write_urb_pool[j] = NULL;
855 err("%s-out of memory for urb buffers.", __func__);
860 /*****************************************************************************
861 * Initialize MCS7840 -- Write Init values to corresponding Registers
869 * 0x08 : SP1/2 Control Reg
870 *****************************************************************************/
872 /* NEED to check the following Block */
875 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
877 dbg("Reading Spreg failed\n");
881 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
883 dbg("writing Spreg failed\n");
888 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
890 dbg("writing Spreg failed\n");
893 /* End of block to be checked */
896 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
899 dbg("Reading Controlreg failed\n");
902 Data |= 0x08; /* Driver done bit */
903 Data |= 0x20; /* rx_disable */
904 status = mos7840_set_reg_sync(port,
905 mos7840_port->ControlRegOffset, Data);
907 dbg("writing Controlreg failed\n");
910 /* do register settings here */
911 /* Set all regs to the device default values. */
912 /***********************************
913 * First Disable all interrupts.
914 ***********************************/
916 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
918 dbg("disableing interrupts failed\n");
921 /* Set FIFO_CONTROL_REGISTER to the default value */
923 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
925 dbg("Writing FIFO_CONTROL_REGISTER failed\n");
930 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
932 dbg("Writing FIFO_CONTROL_REGISTER failed\n");
937 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
938 mos7840_port->shadowLCR = Data;
941 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
942 mos7840_port->shadowMCR = Data;
945 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
946 mos7840_port->shadowLCR = Data;
948 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
949 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
952 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
955 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
958 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
960 Data = Data & ~SERIAL_LCR_DLAB;
961 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
962 mos7840_port->shadowLCR = Data;
964 /* clearing Bulkin and Bulkout Fifo */
966 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
969 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
972 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
973 /* Finally enable all interrupts */
975 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
977 /* clearing rx_disable */
979 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
982 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
987 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
990 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
993 /* Check to see if we've set up our endpoint info yet *
994 * (can't set it up in mos7840_startup as the structures *
995 * were not set up at that time.) */
996 if (port0->open_ports == 1) {
997 if (serial->port[0]->interrupt_in_buffer == NULL) {
998 /* set up interrupt urb */
999 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1001 usb_rcvintpipe(serial->dev,
1002 serial->port[0]->interrupt_in_endpointAddress),
1003 serial->port[0]->interrupt_in_buffer,
1004 serial->port[0]->interrupt_in_urb->
1005 transfer_buffer_length,
1006 mos7840_interrupt_callback,
1008 serial->port[0]->interrupt_in_urb->interval);
1010 /* start interrupt read for mos7840 *
1011 * will continue as long as mos7840 is connected */
1014 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1017 err("%s - Error %d submitting interrupt urb",
1018 __func__, response);
1025 /* see if we've set up our endpoint info yet *
1026 * (can't set it up in mos7840_startup as the *
1027 * structures were not set up at that time.) */
1029 dbg("port number is %d \n", port->number);
1030 dbg("serial number is %d \n", port->serial->minor);
1031 dbg("Bulkin endpoint is %d \n", port->bulk_in_endpointAddress);
1032 dbg("BulkOut endpoint is %d \n", port->bulk_out_endpointAddress);
1033 dbg("Interrupt endpoint is %d \n", port->interrupt_in_endpointAddress);
1034 dbg("port's number in the device is %d\n", mos7840_port->port_num);
1035 mos7840_port->read_urb = port->read_urb;
1037 /* set up our bulk in urb */
1039 usb_fill_bulk_urb(mos7840_port->read_urb,
1041 usb_rcvbulkpipe(serial->dev,
1042 port->bulk_in_endpointAddress),
1043 port->bulk_in_buffer,
1044 mos7840_port->read_urb->transfer_buffer_length,
1045 mos7840_bulk_in_callback, mos7840_port);
1047 dbg("mos7840_open: bulkin endpoint is %d\n",
1048 port->bulk_in_endpointAddress);
1049 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1051 err("%s - Error %d submitting control urb", __func__,
1055 /* initialize our wait queues */
1056 init_waitqueue_head(&mos7840_port->wait_chase);
1057 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1059 /* initialize our icount structure */
1060 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1062 /* initialize our port settings */
1063 /* Must set to enable ints! */
1064 mos7840_port->shadowMCR = MCR_MASTER_IE;
1065 /* send a open port command */
1066 mos7840_port->open = 1;
1067 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1068 mos7840_port->icount.tx = 0;
1069 mos7840_port->icount.rx = 0;
1071 dbg("\n\nusb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p\n\n",
1072 serial, mos7840_port, port);
1078 /*****************************************************************************
1079 * mos7840_chars_in_buffer
1080 * this function is called by the tty driver when it wants to know how many
1081 * bytes of data we currently have outstanding in the port (data that has
1082 * been written, but hasn't made it out the port yet)
1083 * If successful, we return the number of bytes left to be written in the
1085 * Otherwise we return zero.
1086 *****************************************************************************/
1088 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1090 struct usb_serial_port *port = tty->driver_data;
1093 unsigned long flags;
1094 struct moschip_port *mos7840_port;
1096 dbg("%s \n", " mos7840_chars_in_buffer:entering ...........");
1098 if (mos7840_port_paranoia_check(port, __func__)) {
1099 dbg("%s", "Invalid port \n");
1103 mos7840_port = mos7840_get_port_private(port);
1104 if (mos7840_port == NULL) {
1105 dbg("%s \n", "mos7840_break:leaving ...........");
1109 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1110 for (i = 0; i < NUM_URBS; ++i)
1111 if (mos7840_port->busy[i])
1112 chars += URB_TRANSFER_BUFFER_SIZE;
1113 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1114 dbg("%s - returns %d", __func__, chars);
1119 /************************************************************************
1121 * mos7840_block_until_tx_empty
1123 * This function will block the close until one of the following:
1125 * 2. The mos7840 has stopped
1126 * 3. A timeout of 3 seconds without activity has expired
1128 ************************************************************************/
1129 static void mos7840_block_until_tx_empty(struct tty_struct *tty,
1130 struct moschip_port *mos7840_port)
1132 int timeout = HZ / 10;
1138 count = mos7840_chars_in_buffer(tty);
1140 /* Check for Buffer status */
1144 /* Block the thread for a while */
1145 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1148 /* No activity.. count down section */
1151 dbg("%s - TIMEOUT", __func__);
1154 /* Reset timeout value back to seconds */
1160 /*****************************************************************************
1162 * this function is called by the tty driver when a port is closed
1163 *****************************************************************************/
1165 static void mos7840_close(struct tty_struct *tty,
1166 struct usb_serial_port *port, struct file *filp)
1168 struct usb_serial *serial;
1169 struct moschip_port *mos7840_port;
1170 struct moschip_port *port0;
1174 dbg("%s\n", "mos7840_close:entering...");
1176 if (mos7840_port_paranoia_check(port, __func__)) {
1177 dbg("%s", "Port Paranoia failed \n");
1181 serial = mos7840_get_usb_serial(port, __func__);
1183 dbg("%s", "Serial Paranoia failed \n");
1187 mos7840_port = mos7840_get_port_private(port);
1188 port0 = mos7840_get_port_private(serial->port[0]);
1190 if (mos7840_port == NULL || port0 == NULL)
1193 for (j = 0; j < NUM_URBS; ++j)
1194 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1196 /* Freeing Write URBs */
1197 for (j = 0; j < NUM_URBS; ++j) {
1198 if (mos7840_port->write_urb_pool[j]) {
1199 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1200 kfree(mos7840_port->write_urb_pool[j]->
1203 usb_free_urb(mos7840_port->write_urb_pool[j]);
1208 /* flush and block until tx is empty */
1209 mos7840_block_until_tx_empty(tty, mos7840_port);
1211 /* While closing port, shutdown all bulk read, write *
1212 * and interrupt read if they exists */
1214 if (mos7840_port->write_urb) {
1215 dbg("%s", "Shutdown bulk write\n");
1216 usb_kill_urb(mos7840_port->write_urb);
1218 if (mos7840_port->read_urb) {
1219 dbg("%s", "Shutdown bulk read\n");
1220 usb_kill_urb(mos7840_port->read_urb);
1222 if ((&mos7840_port->control_urb)) {
1223 dbg("%s", "Shutdown control read\n");
1224 /*/ usb_kill_urb (mos7840_port->control_urb); */
1227 /* if(mos7840_port->ctrl_buf != NULL) */
1228 /* kfree(mos7840_port->ctrl_buf); */
1229 port0->open_ports--;
1230 dbg("mos7840_num_open_ports in close%d:in port%d\n",
1231 port0->open_ports, port->number);
1232 if (port0->open_ports == 0) {
1233 if (serial->port[0]->interrupt_in_urb) {
1234 dbg("%s", "Shutdown interrupt_in_urb\n");
1235 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1239 if (mos7840_port->write_urb) {
1240 /* if this urb had a transfer buffer already (old tx) free it */
1241 if (mos7840_port->write_urb->transfer_buffer != NULL)
1242 kfree(mos7840_port->write_urb->transfer_buffer);
1243 usb_free_urb(mos7840_port->write_urb);
1247 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1250 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1252 mos7840_port->open = 0;
1254 dbg("%s \n", "Leaving ............");
1257 /************************************************************************
1259 * mos7840_block_until_chase_response
1261 * This function will block the close until one of the following:
1262 * 1. Response to our Chase comes from mos7840
1263 * 2. A timeout of 10 seconds without activity has expired
1264 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1266 ************************************************************************/
1268 static void mos7840_block_until_chase_response(struct tty_struct *tty,
1269 struct moschip_port *mos7840_port)
1271 int timeout = 1 * HZ;
1276 count = mos7840_chars_in_buffer(tty);
1278 /* Check for Buffer status */
1282 /* Block the thread for a while */
1283 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1285 /* No activity.. count down section */
1288 dbg("%s - TIMEOUT", __func__);
1291 /* Reset timeout value back to seconds */
1298 /*****************************************************************************
1300 * this function sends a break to the port
1301 *****************************************************************************/
1302 static void mos7840_break(struct tty_struct *tty, int break_state)
1304 struct usb_serial_port *port = tty->driver_data;
1306 struct usb_serial *serial;
1307 struct moschip_port *mos7840_port;
1309 dbg("%s \n", "Entering ...........");
1310 dbg("mos7840_break: Start\n");
1312 if (mos7840_port_paranoia_check(port, __func__)) {
1313 dbg("%s", "Port Paranoia failed \n");
1317 serial = mos7840_get_usb_serial(port, __func__);
1319 dbg("%s", "Serial Paranoia failed \n");
1323 mos7840_port = mos7840_get_port_private(port);
1325 if (mos7840_port == NULL)
1329 /* flush and block until tx is empty */
1330 mos7840_block_until_chase_response(tty, mos7840_port);
1332 if (break_state == -1)
1333 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1335 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1337 mos7840_port->shadowLCR = data;
1338 dbg("mcs7840_break mos7840_port->shadowLCR is %x\n",
1339 mos7840_port->shadowLCR);
1340 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1341 mos7840_port->shadowLCR);
1346 /*****************************************************************************
1347 * mos7840_write_room
1348 * this function is called by the tty driver when it wants to know how many
1349 * bytes of data we can accept for a specific port.
1350 * If successful, we return the amount of room that we have for this port
1351 * Otherwise we return a negative error number.
1352 *****************************************************************************/
1354 static int mos7840_write_room(struct tty_struct *tty)
1356 struct usb_serial_port *port = tty->driver_data;
1359 unsigned long flags;
1360 struct moschip_port *mos7840_port;
1362 dbg("%s \n", " mos7840_write_room:entering ...........");
1364 if (mos7840_port_paranoia_check(port, __func__)) {
1365 dbg("%s", "Invalid port \n");
1366 dbg("%s \n", " mos7840_write_room:leaving ...........");
1370 mos7840_port = mos7840_get_port_private(port);
1371 if (mos7840_port == NULL) {
1372 dbg("%s \n", "mos7840_break:leaving ...........");
1376 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1377 for (i = 0; i < NUM_URBS; ++i) {
1378 if (!mos7840_port->busy[i])
1379 room += URB_TRANSFER_BUFFER_SIZE;
1381 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1383 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1384 dbg("%s - returns %d", __func__, room);
1389 /*****************************************************************************
1391 * this function is called by the tty driver when data should be written to
1393 * If successful, we return the number of bytes written, otherwise we
1394 * return a negative error number.
1395 *****************************************************************************/
1397 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1398 const unsigned char *data, int count)
1404 unsigned long flags;
1406 struct moschip_port *mos7840_port;
1407 struct usb_serial *serial;
1410 const unsigned char *current_position = data;
1411 unsigned char *data1;
1412 dbg("%s \n", "entering ...........");
1413 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1414 mos7840_port->shadowLCR); */
1418 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1419 mos7840_port->shadowLCR = Data;
1420 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data);
1421 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1422 mos7840_port->shadowLCR);
1425 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1426 /* mos7840_port->shadowLCR=Data;//Need to add later */
1428 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1429 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1432 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1434 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1435 dbg("mos7840_write:DLL value is %x\n", Data);
1438 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1439 dbg("mos7840_write:DLM value is %x\n", Data);
1441 Data = Data & ~SERIAL_LCR_DLAB;
1442 dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
1443 mos7840_port->shadowLCR);
1444 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1447 if (mos7840_port_paranoia_check(port, __func__)) {
1448 dbg("%s", "Port Paranoia failed \n");
1452 serial = port->serial;
1453 if (mos7840_serial_paranoia_check(serial, __func__)) {
1454 dbg("%s", "Serial Paranoia failed \n");
1458 mos7840_port = mos7840_get_port_private(port);
1459 if (mos7840_port == NULL) {
1460 dbg("%s", "mos7840_port is NULL\n");
1464 /* try to find a free urb in the list */
1467 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1468 for (i = 0; i < NUM_URBS; ++i) {
1469 if (!mos7840_port->busy[i]) {
1470 mos7840_port->busy[i] = 1;
1471 urb = mos7840_port->write_urb_pool[i];
1476 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1479 dbg("%s - no more free urbs", __func__);
1483 if (urb->transfer_buffer == NULL) {
1484 urb->transfer_buffer =
1485 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1487 if (urb->transfer_buffer == NULL) {
1488 err("%s no more kernel memory...", __func__);
1492 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1494 memcpy(urb->transfer_buffer, current_position, transfer_size);
1496 /* fill urb with data and submit */
1497 usb_fill_bulk_urb(urb,
1499 usb_sndbulkpipe(serial->dev,
1500 port->bulk_out_endpointAddress),
1501 urb->transfer_buffer,
1503 mos7840_bulk_out_data_callback, mos7840_port);
1505 data1 = urb->transfer_buffer;
1506 dbg("\nbulkout endpoint is %d", port->bulk_out_endpointAddress);
1508 /* send it down the pipe */
1509 status = usb_submit_urb(urb, GFP_ATOMIC);
1512 mos7840_port->busy[i] = 0;
1513 err("%s - usb_submit_urb(write bulk) failed with status = %d",
1515 bytes_sent = status;
1518 bytes_sent = transfer_size;
1519 mos7840_port->icount.tx += transfer_size;
1521 dbg("mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
1527 /*****************************************************************************
1529 * this function is called by the tty driver when it wants to stop the data
1530 * being read from the port.
1531 *****************************************************************************/
1533 static void mos7840_throttle(struct tty_struct *tty)
1535 struct usb_serial_port *port = tty->driver_data;
1536 struct moschip_port *mos7840_port;
1539 if (mos7840_port_paranoia_check(port, __func__)) {
1540 dbg("%s", "Invalid port \n");
1544 dbg("- port %d\n", port->number);
1546 mos7840_port = mos7840_get_port_private(port);
1548 if (mos7840_port == NULL)
1551 if (!mos7840_port->open) {
1552 dbg("%s\n", "port not opened");
1556 dbg("%s", "Entering .......... \n");
1558 /* if we are implementing XON/XOFF, send the stop character */
1560 unsigned char stop_char = STOP_CHAR(tty);
1561 status = mos7840_write(tty, port, &stop_char, 1);
1565 /* if we are implementing RTS/CTS, toggle that line */
1566 if (tty->termios->c_cflag & CRTSCTS) {
1567 mos7840_port->shadowMCR &= ~MCR_RTS;
1568 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1569 mos7840_port->shadowMCR);
1577 /*****************************************************************************
1578 * mos7840_unthrottle
1579 * this function is called by the tty driver when it wants to resume
1580 * the data being read from the port (called after mos7840_throttle is
1582 *****************************************************************************/
1583 static void mos7840_unthrottle(struct tty_struct *tty)
1585 struct usb_serial_port *port = tty->driver_data;
1587 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1589 if (mos7840_port_paranoia_check(port, __func__)) {
1590 dbg("%s", "Invalid port \n");
1594 if (mos7840_port == NULL)
1597 if (!mos7840_port->open) {
1598 dbg("%s - port not opened", __func__);
1602 dbg("%s", "Entering .......... \n");
1604 /* if we are implementing XON/XOFF, send the start character */
1606 unsigned char start_char = START_CHAR(tty);
1607 status = mos7840_write(tty, port, &start_char, 1);
1612 /* if we are implementing RTS/CTS, toggle that line */
1613 if (tty->termios->c_cflag & CRTSCTS) {
1614 mos7840_port->shadowMCR |= MCR_RTS;
1615 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1616 mos7840_port->shadowMCR);
1622 static int mos7840_tiocmget(struct tty_struct *tty, struct file *file)
1624 struct usb_serial_port *port = tty->driver_data;
1625 struct moschip_port *mos7840_port;
1626 unsigned int result;
1630 mos7840_port = mos7840_get_port_private(port);
1632 dbg("%s - port %d", __func__, port->number);
1634 if (mos7840_port == NULL)
1637 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1638 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1639 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1640 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1641 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1642 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1643 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1644 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1645 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1647 dbg("%s - 0x%04X", __func__, result);
1652 static int mos7840_tiocmset(struct tty_struct *tty, struct file *file,
1653 unsigned int set, unsigned int clear)
1655 struct usb_serial_port *port = tty->driver_data;
1656 struct moschip_port *mos7840_port;
1660 dbg("%s - port %d", __func__, port->number);
1662 mos7840_port = mos7840_get_port_private(port);
1664 if (mos7840_port == NULL)
1667 /* FIXME: What locks the port registers ? */
1668 mcr = mos7840_port->shadowMCR;
1669 if (clear & TIOCM_RTS)
1671 if (clear & TIOCM_DTR)
1673 if (clear & TIOCM_LOOP)
1674 mcr &= ~MCR_LOOPBACK;
1676 if (set & TIOCM_RTS)
1678 if (set & TIOCM_DTR)
1680 if (set & TIOCM_LOOP)
1681 mcr |= MCR_LOOPBACK;
1683 mos7840_port->shadowMCR = mcr;
1685 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1687 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
1694 /*****************************************************************************
1695 * mos7840_calc_baud_rate_divisor
1696 * this function calculates the proper baud rate divisor for the specified
1698 *****************************************************************************/
1699 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
1703 dbg("%s - %d", __func__, baudRate);
1705 if (baudRate <= 115200) {
1706 *divisor = 115200 / baudRate;
1709 if ((baudRate > 115200) && (baudRate <= 230400)) {
1710 *divisor = 230400 / baudRate;
1711 *clk_sel_val = 0x10;
1712 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1713 *divisor = 403200 / baudRate;
1714 *clk_sel_val = 0x20;
1715 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1716 *divisor = 460800 / baudRate;
1717 *clk_sel_val = 0x30;
1718 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1719 *divisor = 806400 / baudRate;
1720 *clk_sel_val = 0x40;
1721 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1722 *divisor = 921600 / baudRate;
1723 *clk_sel_val = 0x50;
1724 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1725 *divisor = 1572864 / baudRate;
1726 *clk_sel_val = 0x60;
1727 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1728 *divisor = 3145728 / baudRate;
1729 *clk_sel_val = 0x70;
1735 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1736 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1737 *divisor = mos7840_divisor_table[i].Divisor;
1742 /* After trying for all the standard baud rates *
1743 * Try calculating the divisor for this baud rate */
1745 if (baudrate > 75 && baudrate < 230400) {
1746 /* get the divisor */
1747 custom = (__u16) (230400L / baudrate);
1749 /* Check for round off */
1750 round1 = (__u16) (2304000L / baudrate);
1751 round = (__u16) (round1 - (custom * 10));
1756 dbg(" Baud %d = %d\n", baudrate, custom);
1760 dbg("%s\n", " Baud calculation Failed...");
1765 /*****************************************************************************
1766 * mos7840_send_cmd_write_baud_rate
1767 * this function sends the proper command to change the baud rate of the
1769 *****************************************************************************/
1771 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1777 unsigned char number;
1779 struct usb_serial_port *port;
1781 if (mos7840_port == NULL)
1784 port = (struct usb_serial_port *)mos7840_port->port;
1785 if (mos7840_port_paranoia_check(port, __func__)) {
1786 dbg("%s", "Invalid port \n");
1790 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
1791 dbg("%s", "Invalid Serial \n");
1795 dbg("%s", "Entering .......... \n");
1797 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1799 dbg("%s - port = %d, baud = %d", __func__,
1800 mos7840_port->port->number, baudRate);
1801 /* reset clk_uart_sel in spregOffset */
1802 if (baudRate > 115200) {
1803 #ifdef HW_flow_control
1804 /* NOTE: need to see the pther register to modify */
1805 /* setting h/w flow control bit to 1 */
1807 mos7840_port->shadowMCR = Data;
1808 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1811 dbg("Writing spreg failed in set_serial_baud\n");
1817 #ifdef HW_flow_control
1818 / *setting h/w flow control bit to 0 */
1820 mos7840_port->shadowMCR = Data;
1821 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1824 dbg("Writing spreg failed in set_serial_baud\n");
1831 if (1) { /* baudRate <= 115200) */
1834 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor,
1836 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1839 dbg("reading spreg failed in set_serial_baud\n");
1842 Data = (Data & 0x8f) | clk_sel_val;
1843 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1846 dbg("Writing spreg failed in set_serial_baud\n");
1849 /* Calculate the Divisor */
1852 err("%s - bad baud rate", __func__);
1853 dbg("%s\n", "bad baud rate");
1856 /* Enable access to divisor latch */
1857 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1858 mos7840_port->shadowLCR = Data;
1859 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1861 /* Write the divisor */
1862 Data = (unsigned char)(divisor & 0xff);
1863 dbg("set_serial_baud Value to write DLL is %x\n", Data);
1864 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1866 Data = (unsigned char)((divisor & 0xff00) >> 8);
1867 dbg("set_serial_baud Value to write DLM is %x\n", Data);
1868 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1870 /* Disable access to divisor latch */
1871 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1872 mos7840_port->shadowLCR = Data;
1873 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1879 /*****************************************************************************
1880 * mos7840_change_port_settings
1881 * This routine is called to set the UART on the device to match
1882 * the specified new settings.
1883 *****************************************************************************/
1885 static void mos7840_change_port_settings(struct tty_struct *tty,
1886 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1896 struct usb_serial_port *port;
1897 struct usb_serial *serial;
1899 if (mos7840_port == NULL)
1902 port = (struct usb_serial_port *)mos7840_port->port;
1904 if (mos7840_port_paranoia_check(port, __func__)) {
1905 dbg("%s", "Invalid port \n");
1909 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
1910 dbg("%s", "Invalid Serial \n");
1914 serial = port->serial;
1916 dbg("%s - port %d", __func__, mos7840_port->port->number);
1918 if (!mos7840_port->open) {
1919 dbg("%s - port not opened", __func__);
1923 dbg("%s", "Entering .......... \n");
1927 lParity = LCR_PAR_NONE;
1929 cflag = tty->termios->c_cflag;
1930 iflag = tty->termios->c_iflag;
1932 /* Change the number of bits */
1933 if (cflag & CSIZE) {
1934 switch (cflag & CSIZE) {
1952 /* Change the Parity bit */
1953 if (cflag & PARENB) {
1954 if (cflag & PARODD) {
1955 lParity = LCR_PAR_ODD;
1956 dbg("%s - parity = odd", __func__);
1958 lParity = LCR_PAR_EVEN;
1959 dbg("%s - parity = even", __func__);
1963 dbg("%s - parity = none", __func__);
1967 lParity = lParity | 0x20;
1969 /* Change the Stop bit */
1970 if (cflag & CSTOPB) {
1972 dbg("%s - stop bits = 2", __func__);
1975 dbg("%s - stop bits = 1", __func__);
1978 /* Update the LCR with the correct value */
1979 mos7840_port->shadowLCR &=
1980 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1981 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1983 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x\n",
1984 mos7840_port->shadowLCR);
1985 /* Disable Interrupts */
1987 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1990 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1993 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1995 /* Send the updated LCR value to the mos7840 */
1996 Data = mos7840_port->shadowLCR;
1998 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2001 mos7840_port->shadowMCR = Data;
2002 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2004 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2006 /* set up the MCR register and send it to the mos7840 */
2008 mos7840_port->shadowMCR = MCR_MASTER_IE;
2010 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2012 if (cflag & CRTSCTS)
2013 mos7840_port->shadowMCR |= (MCR_XON_ANY);
2015 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
2017 Data = mos7840_port->shadowMCR;
2018 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2020 /* Determine divisor based on baud rate */
2021 baud = tty_get_baud_rate(tty);
2024 /* pick a default, any default... */
2025 dbg("%s\n", "Picked default baud...");
2029 dbg("%s - baud rate = %d", __func__, baud);
2030 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2032 /* Enable Interrupts */
2034 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2036 if (mos7840_port->read_urb->status != -EINPROGRESS) {
2037 mos7840_port->read_urb->dev = serial->dev;
2039 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2042 dbg(" usb_submit_urb(read bulk) failed, status = %d",
2046 wake_up(&mos7840_port->delta_msr_wait);
2047 mos7840_port->delta_msr_cond = 1;
2048 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x\n",
2049 mos7840_port->shadowLCR);
2054 /*****************************************************************************
2055 * mos7840_set_termios
2056 * this function is called by the tty driver when it wants to change
2057 * the termios structure
2058 *****************************************************************************/
2060 static void mos7840_set_termios(struct tty_struct *tty,
2061 struct usb_serial_port *port,
2062 struct ktermios *old_termios)
2066 struct usb_serial *serial;
2067 struct moschip_port *mos7840_port;
2068 dbg("mos7840_set_termios: START\n");
2069 if (mos7840_port_paranoia_check(port, __func__)) {
2070 dbg("%s", "Invalid port \n");
2074 serial = port->serial;
2076 if (mos7840_serial_paranoia_check(serial, __func__)) {
2077 dbg("%s", "Invalid Serial \n");
2081 mos7840_port = mos7840_get_port_private(port);
2083 if (mos7840_port == NULL)
2086 if (!mos7840_port->open) {
2087 dbg("%s - port not opened", __func__);
2091 dbg("%s\n", "setting termios - ");
2093 cflag = tty->termios->c_cflag;
2095 dbg("%s - clfag %08x iflag %08x", __func__,
2096 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
2097 dbg("%s - old clfag %08x old iflag %08x", __func__,
2098 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2099 dbg("%s - port %d", __func__, port->number);
2101 /* change the port settings to the new ones specified */
2103 mos7840_change_port_settings(tty, mos7840_port, old_termios);
2105 if (!mos7840_port->read_urb) {
2106 dbg("%s", "URB KILLED !!!!!\n");
2110 if (mos7840_port->read_urb->status != -EINPROGRESS) {
2111 mos7840_port->read_urb->dev = serial->dev;
2112 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2114 dbg(" usb_submit_urb(read bulk) failed, status = %d",
2121 /*****************************************************************************
2122 * mos7840_get_lsr_info - get line status register info
2124 * Purpose: Let user call ioctl() to get info when the UART physically
2125 * is emptied. On bus types like RS485, the transmitter must
2126 * release the bus after transmitting. This must be done when
2127 * the transmit shift register is empty, not be done when the
2128 * transmit holding register is empty. This functionality
2129 * allows an RS485 driver to be written in user space.
2130 *****************************************************************************/
2132 static int mos7840_get_lsr_info(struct tty_struct *tty,
2133 unsigned int __user *value)
2136 unsigned int result = 0;
2138 count = mos7840_chars_in_buffer(tty);
2140 dbg("%s -- Empty", __func__);
2141 result = TIOCSER_TEMT;
2144 if (copy_to_user(value, &result, sizeof(int)))
2149 /*****************************************************************************
2150 * mos7840_set_modem_info
2151 * function to set modem info
2152 *****************************************************************************/
2154 /* FIXME: Should be using the model control hooks */
2156 static int mos7840_set_modem_info(struct moschip_port *mos7840_port,
2157 unsigned int cmd, unsigned int __user *value)
2163 struct usb_serial_port *port;
2165 if (mos7840_port == NULL)
2168 port = (struct usb_serial_port *)mos7840_port->port;
2169 if (mos7840_port_paranoia_check(port, __func__)) {
2170 dbg("%s", "Invalid port \n");
2174 mcr = mos7840_port->shadowMCR;
2176 if (copy_from_user(&arg, value, sizeof(int)))
2181 if (arg & TIOCM_RTS)
2183 if (arg & TIOCM_DTR)
2185 if (arg & TIOCM_LOOP)
2186 mcr |= MCR_LOOPBACK;
2190 if (arg & TIOCM_RTS)
2192 if (arg & TIOCM_DTR)
2194 if (arg & TIOCM_LOOP)
2195 mcr &= ~MCR_LOOPBACK;
2199 /* turn off the RTS and DTR and LOOPBACK
2200 * and then only turn on what was asked to */
2201 mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK);
2202 mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0);
2203 mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0);
2204 mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0);
2208 mos7840_port->shadowMCR = mcr;
2210 Data = mos7840_port->shadowMCR;
2211 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2213 dbg("setting MODEM_CONTROL_REGISTER Failed\n");
2220 /*****************************************************************************
2221 * mos7840_get_modem_info
2222 * function to get modem info
2223 *****************************************************************************/
2225 static int mos7840_get_modem_info(struct moschip_port *mos7840_port,
2226 unsigned int __user *value)
2228 unsigned int result = 0;
2230 unsigned int mcr = mos7840_port->shadowMCR;
2231 mos7840_get_uart_reg(mos7840_port->port,
2232 MODEM_STATUS_REGISTER, &msr);
2233 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */
2234 |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */
2235 |((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */
2236 |((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) /* 0x040 */
2237 |((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */
2238 |((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */
2240 dbg("%s -- %x", __func__, result);
2242 if (copy_to_user(value, &result, sizeof(int)))
2247 /*****************************************************************************
2248 * mos7840_get_serial_info
2249 * function to get information about serial port
2250 *****************************************************************************/
2252 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2253 struct serial_struct __user *retinfo)
2255 struct serial_struct tmp;
2257 if (mos7840_port == NULL)
2263 memset(&tmp, 0, sizeof(tmp));
2265 tmp.type = PORT_16550A;
2266 tmp.line = mos7840_port->port->serial->minor;
2267 tmp.port = mos7840_port->port->number;
2269 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2270 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2271 tmp.baud_base = 9600;
2272 tmp.close_delay = 5 * HZ;
2273 tmp.closing_wait = 30 * HZ;
2275 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2280 /*****************************************************************************
2282 * this function handles any ioctl calls to the driver
2283 *****************************************************************************/
2285 static int mos7840_ioctl(struct tty_struct *tty, struct file *file,
2286 unsigned int cmd, unsigned long arg)
2288 struct usb_serial_port *port = tty->driver_data;
2289 void __user *argp = (void __user *)arg;
2290 struct moschip_port *mos7840_port;
2292 struct async_icount cnow;
2293 struct async_icount cprev;
2294 struct serial_icounter_struct icount;
2297 if (mos7840_port_paranoia_check(port, __func__)) {
2298 dbg("%s", "Invalid port \n");
2302 mos7840_port = mos7840_get_port_private(port);
2304 if (mos7840_port == NULL)
2307 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
2310 /* return number of bytes available */
2313 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
2314 return mos7840_get_lsr_info(tty, argp);
2317 /* FIXME: use the modem hooks and remove this */
2321 dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __func__,
2324 mos7840_set_modem_info(mos7840_port, cmd, argp);
2328 dbg("%s (%d) TIOCMGET", __func__, port->number);
2329 return mos7840_get_modem_info(mos7840_port, argp);
2332 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
2333 return mos7840_get_serial_info(mos7840_port, argp);
2336 dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
2340 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
2341 cprev = mos7840_port->icount;
2343 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2344 mos7840_port->delta_msr_cond = 0;
2345 wait_event_interruptible(mos7840_port->delta_msr_wait,
2347 delta_msr_cond == 1));
2349 /* see if a signal did it */
2350 if (signal_pending(current))
2351 return -ERESTARTSYS;
2352 cnow = mos7840_port->icount;
2354 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2355 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2356 return -EIO; /* no change => error */
2357 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2358 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2359 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2360 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2369 cnow = mos7840_port->icount;
2371 icount.cts = cnow.cts;
2372 icount.dsr = cnow.dsr;
2373 icount.rng = cnow.rng;
2374 icount.dcd = cnow.dcd;
2375 icount.rx = cnow.rx;
2376 icount.tx = cnow.tx;
2377 icount.frame = cnow.frame;
2378 icount.overrun = cnow.overrun;
2379 icount.parity = cnow.parity;
2380 icount.brk = cnow.brk;
2381 icount.buf_overrun = cnow.buf_overrun;
2383 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
2384 port->number, icount.rx, icount.tx);
2385 if (copy_to_user(argp, &icount, sizeof(icount)))
2391 return -ENOIOCTLCMD;
2394 static int mos7840_calc_num_ports(struct usb_serial *serial)
2396 int mos7840_num_ports = 0;
2398 dbg("numberofendpoints: %d \n",
2399 (int)serial->interface->cur_altsetting->desc.bNumEndpoints);
2400 dbg("numberofendpoints: %d \n",
2401 (int)serial->interface->altsetting->desc.bNumEndpoints);
2402 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) {
2403 mos7840_num_ports = serial->num_ports = 2;
2404 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) {
2405 serial->num_bulk_in = 4;
2406 serial->num_bulk_out = 4;
2407 mos7840_num_ports = serial->num_ports = 4;
2410 return mos7840_num_ports;
2413 /****************************************************************************
2415 ****************************************************************************/
2417 static int mos7840_startup(struct usb_serial *serial)
2419 struct moschip_port *mos7840_port;
2420 struct usb_device *dev;
2424 dbg("%s \n", " mos7840_startup :entering..........");
2427 dbg("%s\n", "Invalid Handler");
2433 dbg("%s\n", "Entering...");
2435 /* we set up the pointers to the endpoints in the mos7840_open *
2436 * function, as the structures aren't created yet. */
2438 /* set up port private structures */
2439 for (i = 0; i < serial->num_ports; ++i) {
2440 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2441 if (mos7840_port == NULL) {
2442 err("%s - Out of memory", __func__);
2444 i--; /* don't follow NULL pointer cleaning up */
2448 /* Initialize all port interrupt end point to port 0 int
2449 * endpoint. Our device has only one interrupt end point
2450 * common to all port */
2452 mos7840_port->port = serial->port[i];
2453 mos7840_set_port_private(serial->port[i], mos7840_port);
2454 spin_lock_init(&mos7840_port->pool_lock);
2456 mos7840_port->port_num = ((serial->port[i]->number -
2457 (serial->port[i]->serial->minor)) +
2460 if (mos7840_port->port_num == 1) {
2461 mos7840_port->SpRegOffset = 0x0;
2462 mos7840_port->ControlRegOffset = 0x1;
2463 mos7840_port->DcrRegOffset = 0x4;
2464 } else if ((mos7840_port->port_num == 2)
2465 && (serial->num_ports == 4)) {
2466 mos7840_port->SpRegOffset = 0x8;
2467 mos7840_port->ControlRegOffset = 0x9;
2468 mos7840_port->DcrRegOffset = 0x16;
2469 } else if ((mos7840_port->port_num == 2)
2470 && (serial->num_ports == 2)) {
2471 mos7840_port->SpRegOffset = 0xa;
2472 mos7840_port->ControlRegOffset = 0xb;
2473 mos7840_port->DcrRegOffset = 0x19;
2474 } else if ((mos7840_port->port_num == 3)
2475 && (serial->num_ports == 4)) {
2476 mos7840_port->SpRegOffset = 0xa;
2477 mos7840_port->ControlRegOffset = 0xb;
2478 mos7840_port->DcrRegOffset = 0x19;
2479 } else if ((mos7840_port->port_num == 4)
2480 && (serial->num_ports == 4)) {
2481 mos7840_port->SpRegOffset = 0xc;
2482 mos7840_port->ControlRegOffset = 0xd;
2483 mos7840_port->DcrRegOffset = 0x1c;
2485 mos7840_dump_serial_port(mos7840_port);
2486 mos7840_set_port_private(serial->port[i], mos7840_port);
2488 /* enable rx_disable bit in control register */
2489 status = mos7840_get_reg_sync(serial->port[i],
2490 mos7840_port->ControlRegOffset, &Data);
2492 dbg("Reading ControlReg failed status-0x%x\n", status);
2495 dbg("ControlReg Reading success val is %x, status%d\n",
2497 Data |= 0x08; /* setting driver done bit */
2498 Data |= 0x04; /* sp1_bit to have cts change reflect in
2501 /* Data |= 0x20; //rx_disable bit */
2502 status = mos7840_set_reg_sync(serial->port[i],
2503 mos7840_port->ControlRegOffset, Data);
2505 dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2508 dbg("ControlReg Writing success(rx_disable) status%d\n",
2511 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2514 status = mos7840_set_reg_sync(serial->port[i],
2515 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2517 dbg("Writing DCR0 failed status-0x%x\n", status);
2520 dbg("DCR0 Writing success status%d\n", status);
2523 status = mos7840_set_reg_sync(serial->port[i],
2524 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2526 dbg("Writing DCR1 failed status-0x%x\n", status);
2529 dbg("DCR1 Writing success status%d\n", status);
2532 status = mos7840_set_reg_sync(serial->port[i],
2533 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2535 dbg("Writing DCR2 failed status-0x%x\n", status);
2538 dbg("DCR2 Writing success status%d\n", status);
2540 /* write values in clkstart0x0 and clkmulti 0x20 */
2542 status = mos7840_set_reg_sync(serial->port[i],
2543 CLK_START_VALUE_REGISTER, Data);
2545 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2548 dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2551 status = mos7840_set_reg_sync(serial->port[i],
2552 CLK_MULTI_REGISTER, Data);
2554 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n",
2558 dbg("CLK_MULTI_REGISTER Writing success status%d\n",
2561 /* write value 0x0 to scratchpad register */
2563 status = mos7840_set_uart_reg(serial->port[i],
2564 SCRATCH_PAD_REGISTER, Data);
2566 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n",
2570 dbg("SCRATCH_PAD_REGISTER Writing success status%d\n",
2573 /* Zero Length flag register */
2574 if ((mos7840_port->port_num != 1)
2575 && (serial->num_ports == 2)) {
2578 status = mos7840_set_reg_sync(serial->port[i],
2580 ((__u16)mos7840_port->port_num)), Data);
2581 dbg("ZLIP offset%x\n",
2583 ((__u16) mos7840_port->port_num)));
2585 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2589 dbg("ZLP_REG%d Writing success status%d\n",
2593 status = mos7840_set_reg_sync(serial->port[i],
2595 ((__u16)mos7840_port->port_num) - 0x1), Data);
2596 dbg("ZLIP offset%x\n",
2598 ((__u16) mos7840_port->port_num) - 0x1));
2600 dbg("Writing ZLP_REG%d failed status-0x%x\n",
2604 dbg("ZLP_REG%d Writing success status%d\n",
2608 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2609 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2610 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2612 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2613 !mos7840_port->dr) {
2619 /* Zero Length flag enable */
2621 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2623 dbg("Writing ZLP_REG5 failed status-0x%x\n", status);
2626 dbg("ZLP_REG5 Writing success status%d\n", status);
2628 /* setting configuration feature to one */
2629 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2630 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
2633 for (/* nothing */; i >= 0; i--) {
2634 mos7840_port = mos7840_get_port_private(serial->port[i]);
2636 kfree(mos7840_port->dr);
2637 kfree(mos7840_port->ctrl_buf);
2638 usb_free_urb(mos7840_port->control_urb);
2639 kfree(mos7840_port);
2640 serial->port[i] = NULL;
2645 /****************************************************************************
2646 * mos7840_disconnect
2647 * This function is called whenever the device is removed from the usb bus.
2648 ****************************************************************************/
2650 static void mos7840_disconnect(struct usb_serial *serial)
2653 unsigned long flags;
2654 struct moschip_port *mos7840_port;
2655 dbg("%s\n", " disconnect :entering..........");
2658 dbg("%s", "Invalid Handler \n");
2662 /* check for the ports to be closed,close the ports and disconnect */
2664 /* free private structure allocated for serial port *
2665 * stop reads and writes on all ports */
2667 for (i = 0; i < serial->num_ports; ++i) {
2668 mos7840_port = mos7840_get_port_private(serial->port[i]);
2669 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
2670 mos7840_port->zombie = 1;
2671 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
2672 usb_kill_urb(mos7840_port->control_urb);
2675 dbg("%s\n", "Thank u ::");
2679 /****************************************************************************
2681 * This function is called when the usb_serial structure is freed.
2682 ****************************************************************************/
2684 static void mos7840_release(struct usb_serial *serial)
2687 struct moschip_port *mos7840_port;
2688 dbg("%s\n", " release :entering..........");
2691 dbg("%s", "Invalid Handler");
2695 /* check for the ports to be closed,close the ports and disconnect */
2697 /* free private structure allocated for serial port *
2698 * stop reads and writes on all ports */
2700 for (i = 0; i < serial->num_ports; ++i) {
2701 mos7840_port = mos7840_get_port_private(serial->port[i]);
2702 dbg("mos7840_port %d = %p", i, mos7840_port);
2704 kfree(mos7840_port->ctrl_buf);
2705 kfree(mos7840_port->dr);
2706 kfree(mos7840_port);
2710 dbg("%s\n", "Thank u :: ");
2714 static struct usb_driver io_driver = {
2716 .probe = usb_serial_probe,
2717 .disconnect = usb_serial_disconnect,
2718 .id_table = moschip_id_table_combined,
2722 static struct usb_serial_driver moschip7840_4port_device = {
2724 .owner = THIS_MODULE,
2727 .description = DRIVER_DESC,
2728 .usb_driver = &io_driver,
2729 .id_table = moschip_port_id_table,
2731 .open = mos7840_open,
2732 .close = mos7840_close,
2733 .write = mos7840_write,
2734 .write_room = mos7840_write_room,
2735 .chars_in_buffer = mos7840_chars_in_buffer,
2736 .throttle = mos7840_throttle,
2737 .unthrottle = mos7840_unthrottle,
2738 .calc_num_ports = mos7840_calc_num_ports,
2739 #ifdef MCSSerialProbe
2740 .probe = mos7840_serial_probe,
2742 .ioctl = mos7840_ioctl,
2743 .set_termios = mos7840_set_termios,
2744 .break_ctl = mos7840_break,
2745 .tiocmget = mos7840_tiocmget,
2746 .tiocmset = mos7840_tiocmset,
2747 .attach = mos7840_startup,
2748 .disconnect = mos7840_disconnect,
2749 .release = mos7840_release,
2750 .read_bulk_callback = mos7840_bulk_in_callback,
2751 .read_int_callback = mos7840_interrupt_callback,
2754 /****************************************************************************
2756 * This is called by the module subsystem, or on startup to initialize us
2757 ****************************************************************************/
2758 static int __init moschip7840_init(void)
2762 dbg("%s \n", " mos7840_init :entering..........");
2764 /* Register with the usb serial */
2765 retval = usb_serial_register(&moschip7840_4port_device);
2768 goto failed_port_device_register;
2770 dbg("%s\n", "Entring...");
2771 info(DRIVER_DESC " " DRIVER_VERSION);
2773 /* Register with the usb */
2774 retval = usb_register(&io_driver);
2776 dbg("%s\n", "Leaving...");
2779 usb_serial_deregister(&moschip7840_4port_device);
2780 failed_port_device_register:
2784 /****************************************************************************
2786 * Called when the driver is about to be unloaded.
2787 ****************************************************************************/
2788 static void __exit moschip7840_exit(void)
2791 dbg("%s \n", " mos7840_exit :entering..........");
2793 usb_deregister(&io_driver);
2795 usb_serial_deregister(&moschip7840_4port_device);
2797 dbg("%s\n", "Entring...");
2800 module_init(moschip7840_init);
2801 module_exit(moschip7840_exit);
2803 /* Module information */
2804 MODULE_DESCRIPTION(DRIVER_DESC);
2805 MODULE_LICENSE("GPL");
2807 module_param(debug, bool, S_IRUGO | S_IWUSR);
2808 MODULE_PARM_DESC(debug, "Debug enabled or not");