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/smp_lock.h>
30 #include <linux/tty.h>
31 #include <linux/tty_driver.h>
32 #include <linux/tty_flip.h>
33 #include <linux/module.h>
34 #include <linux/serial.h>
35 #include <linux/usb.h>
36 #include <linux/usb/serial.h>
37 #include <linux/uaccess.h>
42 #define DRIVER_VERSION "1.3.2"
43 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
46 * 16C50 UART register defines
49 #define LCR_BITS_5 0x00 /* 5 bits/char */
50 #define LCR_BITS_6 0x01 /* 6 bits/char */
51 #define LCR_BITS_7 0x02 /* 7 bits/char */
52 #define LCR_BITS_8 0x03 /* 8 bits/char */
53 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
55 #define LCR_STOP_1 0x00 /* 1 stop bit */
56 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
57 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
58 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
60 #define LCR_PAR_NONE 0x00 /* No parity */
61 #define LCR_PAR_ODD 0x08 /* Odd parity */
62 #define LCR_PAR_EVEN 0x18 /* Even parity */
63 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
64 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
65 #define LCR_PAR_MASK 0x38 /* Mask for parity field */
67 #define LCR_SET_BREAK 0x40 /* Set Break condition */
68 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
70 #define MCR_DTR 0x01 /* Assert DTR */
71 #define MCR_RTS 0x02 /* Assert RTS */
72 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
73 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
74 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
75 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
77 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
78 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
79 #define MOS7840_MSR_RI 0x40 /* Current state of RI */
80 #define MOS7840_MSR_CD 0x80 /* Current state of CD */
83 * Defines used for sending commands to port
86 #define WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */
87 #define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */
89 #define MOS_PORT1 0x0200
90 #define MOS_PORT2 0x0300
91 #define MOS_VENREG 0x0000
92 #define MOS_MAX_PORT 0x02
93 #define MOS_WRITE 0x0E
97 #define MCS_RD_RTYPE 0xC0
98 #define MCS_WR_RTYPE 0x40
99 #define MCS_RDREQ 0x0D
100 #define MCS_WRREQ 0x0E
101 #define MCS_CTRL_TIMEOUT 500
102 #define VENDOR_READ_LENGTH (0x01)
104 #define MAX_NAME_LEN 64
106 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
107 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
109 /* For higher baud Rates use TIOCEXBAUD */
110 #define TIOCEXBAUD 0x5462
112 /* vendor id and device id defines */
114 /* The native mos7840/7820 component */
115 #define USB_VENDOR_ID_MOSCHIP 0x9710
116 #define MOSCHIP_DEVICE_ID_7840 0x7840
117 #define MOSCHIP_DEVICE_ID_7820 0x7820
118 /* The native component can have its vendor/device id's overridden
119 * in vendor-specific implementations. Such devices can be handled
120 * by making a change here, in moschip_port_id_table, and in
121 * moschip_id_table_combined
123 #define USB_VENDOR_ID_BANDB 0x0856
124 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
125 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
126 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29
127 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30
128 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31
129 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32
130 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
131 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
132 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
134 /* This driver also supports
135 * ATEN UC2324 device using Moschip MCS7840
136 * ATEN UC2322 device using Moschip MCS7820
138 #define USB_VENDOR_ID_ATENINTL 0x0557
139 #define ATENINTL_DEVICE_ID_UC2324 0x2011
140 #define ATENINTL_DEVICE_ID_UC2322 0x7820
142 /* Interrupt Routine Defines */
144 #define SERIAL_IIR_RLS 0x06
145 #define SERIAL_IIR_MS 0x00
148 * Emulation of the bit mask on the LINE STATUS REGISTER.
150 #define SERIAL_LSR_DR 0x0001
151 #define SERIAL_LSR_OE 0x0002
152 #define SERIAL_LSR_PE 0x0004
153 #define SERIAL_LSR_FE 0x0008
154 #define SERIAL_LSR_BI 0x0010
156 #define MOS_MSR_DELTA_CTS 0x10
157 #define MOS_MSR_DELTA_DSR 0x20
158 #define MOS_MSR_DELTA_RI 0x40
159 #define MOS_MSR_DELTA_CD 0x80
161 /* Serial Port register Address */
162 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
163 #define FIFO_CONTROL_REGISTER ((__u16)(0x02))
164 #define LINE_CONTROL_REGISTER ((__u16)(0x03))
165 #define MODEM_CONTROL_REGISTER ((__u16)(0x04))
166 #define LINE_STATUS_REGISTER ((__u16)(0x05))
167 #define MODEM_STATUS_REGISTER ((__u16)(0x06))
168 #define SCRATCH_PAD_REGISTER ((__u16)(0x07))
169 #define DIVISOR_LATCH_LSB ((__u16)(0x00))
170 #define DIVISOR_LATCH_MSB ((__u16)(0x01))
172 #define CLK_MULTI_REGISTER ((__u16)(0x02))
173 #define CLK_START_VALUE_REGISTER ((__u16)(0x03))
175 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
178 * URB POOL related defines
180 #define NUM_URBS 16 /* URB Count */
181 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
184 static struct usb_device_id moschip_port_id_table[] = {
185 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
186 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
187 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
188 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
189 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
190 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
191 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
192 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
193 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
194 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
196 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
197 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
198 {} /* terminating entry */
201 static __devinitdata struct usb_device_id moschip_id_table_combined[] = {
202 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
203 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
205 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
206 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
207 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
208 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
209 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
210 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
211 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
212 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
213 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
214 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
215 {} /* terminating entry */
218 MODULE_DEVICE_TABLE(usb, moschip_id_table_combined);
220 /* This structure holds all of the local port information */
222 struct moschip_port {
223 int port_num; /*Actual port number in the device(1,2,etc) */
224 struct urb *write_urb; /* write URB for this port */
225 struct urb *read_urb; /* read URB for this port */
227 __u8 shadowLCR; /* last LCR value received */
228 __u8 shadowMCR; /* last MCR value received */
232 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
233 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
235 struct async_icount icount;
236 struct usb_serial_port *port; /* loop back to the owner of this object */
240 __u8 ControlRegOffset;
242 /* for processing control URBS in interrupt context */
243 struct urb *control_urb;
244 struct usb_ctrlrequest *dr;
248 spinlock_t pool_lock;
249 struct urb *write_urb_pool[NUM_URBS];
258 * mos7840_set_reg_sync
259 * To set the Control register by calling usb_fill_control_urb function
260 * by passing usb_sndctrlpipe function as parameter.
263 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
266 struct usb_device *dev = port->serial->dev;
268 dbg("mos7840_set_reg_sync offset is %x, value %x", reg, val);
270 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
271 MCS_WR_RTYPE, val, reg, NULL, 0,
276 * mos7840_get_reg_sync
277 * To set the Uart register by calling usb_fill_control_urb function by
278 * passing usb_rcvctrlpipe function as parameter.
281 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
284 struct usb_device *dev = port->serial->dev;
287 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
288 MCS_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH,
290 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val);
291 *val = (*val) & 0x00ff;
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->number -
311 (__u16) (port->serial->minor)) + 1) << 8;
312 dbg("mos7840_set_uart_reg application number is %x", val);
314 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
315 val |= (((__u16) port->number -
316 (__u16) (port->serial->minor)) + 1) << 8;
317 dbg("mos7840_set_uart_reg application number is %x",
321 (((__u16) port->number -
322 (__u16) (port->serial->minor)) + 2) << 8;
323 dbg("mos7840_set_uart_reg application number is %x",
327 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
328 MCS_WR_RTYPE, val, reg, NULL, 0,
334 * mos7840_get_uart_reg
335 * To set the Control register by calling usb_fill_control_urb function
336 * by passing usb_rcvctrlpipe function as parameter.
338 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
341 struct usb_device *dev = port->serial->dev;
345 /* dbg("application number is %4x",
346 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
347 /* Wval is same as application number */
348 if (port->serial->num_ports == 4) {
350 (((__u16) port->number - (__u16) (port->serial->minor)) +
352 dbg("mos7840_get_uart_reg application number is %x", Wval);
354 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
355 Wval = (((__u16) port->number -
356 (__u16) (port->serial->minor)) + 1) << 8;
357 dbg("mos7840_get_uart_reg application number is %x",
360 Wval = (((__u16) port->number -
361 (__u16) (port->serial->minor)) + 2) << 8;
362 dbg("mos7840_get_uart_reg application number is %x",
366 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
367 MCS_RD_RTYPE, Wval, reg, val, VENDOR_READ_LENGTH,
369 *val = (*val) & 0x00ff;
373 static void mos7840_dump_serial_port(struct moschip_port *mos7840_port)
376 dbg("***************************************");
377 dbg("SpRegOffset is %2x", mos7840_port->SpRegOffset);
378 dbg("ControlRegOffset is %2x", mos7840_port->ControlRegOffset);
379 dbg("DCRRegOffset is %2x", mos7840_port->DcrRegOffset);
380 dbg("***************************************");
384 /************************************************************************/
385 /************************************************************************/
386 /* I N T E R F A C E F U N C T I O N S */
387 /* I N T E R F A C E F U N C T I O N S */
388 /************************************************************************/
389 /************************************************************************/
391 static inline void mos7840_set_port_private(struct usb_serial_port *port,
392 struct moschip_port *data)
394 usb_set_serial_port_data(port, (void *)data);
397 static inline struct moschip_port *mos7840_get_port_private(struct
401 return (struct moschip_port *)usb_get_serial_port_data(port);
404 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
406 struct moschip_port *mos7840_port;
407 struct async_icount *icount;
409 icount = &mos7840_port->icount;
411 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
413 icount = &mos7840_port->icount;
415 /* update input line counters */
416 if (new_msr & MOS_MSR_DELTA_CTS) {
420 if (new_msr & MOS_MSR_DELTA_DSR) {
424 if (new_msr & MOS_MSR_DELTA_CD) {
428 if (new_msr & MOS_MSR_DELTA_RI) {
435 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
437 struct async_icount *icount;
439 dbg("%s - %02x", __func__, new_lsr);
441 if (new_lsr & SERIAL_LSR_BI) {
443 * Parity and Framing errors only count if they
444 * occur exclusive of a break being
447 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
450 /* update input line counters */
451 icount = &port->icount;
452 if (new_lsr & SERIAL_LSR_BI) {
456 if (new_lsr & SERIAL_LSR_OE) {
460 if (new_lsr & SERIAL_LSR_PE) {
464 if (new_lsr & SERIAL_LSR_FE) {
470 /************************************************************************/
471 /************************************************************************/
472 /* U S B C A L L B A C K F U N C T I O N S */
473 /* U S B C A L L B A C K F U N C T I O N S */
474 /************************************************************************/
475 /************************************************************************/
477 static void mos7840_control_callback(struct urb *urb)
480 struct moschip_port *mos7840_port;
483 int status = urb->status;
485 mos7840_port = urb->context;
494 /* this urb is terminated, clean up */
495 dbg("%s - urb shutting down with status: %d", __func__,
499 dbg("%s - nonzero urb status received: %d", __func__,
504 dbg("%s urb buffer size is %d", __func__, urb->actual_length);
505 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__,
506 mos7840_port->MsrLsr, mos7840_port->port_num);
507 data = urb->transfer_buffer;
508 regval = (__u8) data[0];
509 dbg("%s data is %x", __func__, regval);
510 if (mos7840_port->MsrLsr == 0)
511 mos7840_handle_new_msr(mos7840_port, regval);
512 else if (mos7840_port->MsrLsr == 1)
513 mos7840_handle_new_lsr(mos7840_port, regval);
516 spin_lock(&mos7840_port->pool_lock);
517 if (!mos7840_port->zombie)
518 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC);
519 spin_unlock(&mos7840_port->pool_lock);
521 dev_err(&urb->dev->dev,
522 "%s - Error %d submitting interrupt urb\n",
527 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
530 struct usb_device *dev = mcs->port->serial->dev;
531 struct usb_ctrlrequest *dr = mcs->dr;
532 unsigned char *buffer = mcs->ctrl_buf;
535 dr->bRequestType = MCS_RD_RTYPE;
536 dr->bRequest = MCS_RDREQ;
537 dr->wValue = cpu_to_le16(Wval); /* 0 */
538 dr->wIndex = cpu_to_le16(reg);
539 dr->wLength = cpu_to_le16(2);
541 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
542 (unsigned char *)dr, buffer, 2,
543 mos7840_control_callback, mcs);
544 mcs->control_urb->transfer_buffer_length = 2;
545 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
549 /*****************************************************************************
550 * mos7840_interrupt_callback
551 * this is the callback function for when we have received data on the
552 * interrupt endpoint.
553 *****************************************************************************/
555 static void mos7840_interrupt_callback(struct urb *urb)
559 struct moschip_port *mos7840_port;
560 struct usb_serial *serial;
565 __u16 wval, wreg = 0;
566 int status = urb->status;
568 dbg("%s", " : Entering");
577 /* this urb is terminated, clean up */
578 dbg("%s - urb shutting down with status: %d", __func__,
582 dbg("%s - nonzero urb status received: %d", __func__,
587 length = urb->actual_length;
588 data = urb->transfer_buffer;
590 serial = urb->context;
592 /* Moschip get 5 bytes
593 * Byte 1 IIR Port 1 (port.number is 0)
594 * Byte 2 IIR Port 2 (port.number is 1)
595 * Byte 3 IIR Port 3 (port.number is 2)
596 * Byte 4 IIR Port 4 (port.number is 3)
597 * Byte 5 FIFO status for both */
599 if (length && length > 5) {
600 dbg("%s", "Wrong data !!!");
604 sp[0] = (__u8) data[0];
605 sp[1] = (__u8) data[1];
606 sp[2] = (__u8) data[2];
607 sp[3] = (__u8) data[3];
610 for (i = 0; i < serial->num_ports; i++) {
611 mos7840_port = mos7840_get_port_private(serial->port[i]);
613 (((__u16) serial->port[i]->number -
614 (__u16) (serial->minor)) + 1) << 8;
615 if (mos7840_port->open) {
617 dbg("SP%d No Interrupt !!!", i);
619 switch (sp[i] & 0x0f) {
621 dbg("Serial Port %d: Receiver status error or ", i);
622 dbg("address bit detected in 9-bit mode");
623 mos7840_port->MsrLsr = 1;
624 wreg = LINE_STATUS_REGISTER;
627 dbg("Serial Port %d: Modem status change", i);
628 mos7840_port->MsrLsr = 0;
629 wreg = MODEM_STATUS_REGISTER;
632 spin_lock(&mos7840_port->pool_lock);
633 if (!mos7840_port->zombie) {
634 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
636 spin_unlock(&mos7840_port->pool_lock);
639 spin_unlock(&mos7840_port->pool_lock);
644 /* the completion handler for the control urb will resubmit */
647 result = usb_submit_urb(urb, GFP_ATOMIC);
649 dev_err(&urb->dev->dev,
650 "%s - Error %d submitting interrupt urb\n",
655 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
656 const char *function)
659 dbg("%s - port == NULL", function);
663 dbg("%s - port->serial == NULL", function);
670 /* Inline functions to check the sanity of a pointer that is passed to us */
671 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
672 const char *function)
675 dbg("%s - serial == NULL", function);
679 dbg("%s - serial->type == NULL!", function);
686 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
687 const char *function)
689 /* if no port was specified, or it fails a paranoia check */
691 mos7840_port_paranoia_check(port, function) ||
692 mos7840_serial_paranoia_check(port->serial, function)) {
693 /* then say that we don't have a valid usb_serial thing,
694 * which will end up genrating -ENODEV return values */
701 /*****************************************************************************
702 * mos7840_bulk_in_callback
703 * this is the callback function for when we have received data on the
705 *****************************************************************************/
707 static void mos7840_bulk_in_callback(struct urb *urb)
711 struct usb_serial *serial;
712 struct usb_serial_port *port;
713 struct moschip_port *mos7840_port;
714 struct tty_struct *tty;
715 int status = urb->status;
717 mos7840_port = urb->context;
719 dbg("%s", "NULL mos7840_port pointer");
720 mos7840_port->read_urb_busy = false;
725 dbg("nonzero read bulk status received: %d", status);
726 mos7840_port->read_urb_busy = false;
730 port = (struct usb_serial_port *)mos7840_port->port;
731 if (mos7840_port_paranoia_check(port, __func__)) {
732 dbg("%s", "Port Paranoia failed");
733 mos7840_port->read_urb_busy = false;
737 serial = mos7840_get_usb_serial(port, __func__);
739 dbg("%s", "Bad serial pointer");
740 mos7840_port->read_urb_busy = false;
744 dbg("%s", "Entering... ");
746 data = urb->transfer_buffer;
748 dbg("%s", "Entering ...........");
750 if (urb->actual_length) {
751 tty = tty_port_tty_get(&mos7840_port->port->port);
753 tty_buffer_request_room(tty, urb->actual_length);
754 tty_insert_flip_string(tty, data, urb->actual_length);
756 tty_flip_buffer_push(tty);
759 mos7840_port->icount.rx += urb->actual_length;
761 dbg("mos7840_port->icount.rx is %d:",
762 mos7840_port->icount.rx);
765 if (!mos7840_port->read_urb) {
766 dbg("%s", "URB KILLED !!!");
767 mos7840_port->read_urb_busy = false;
772 mos7840_port->read_urb->dev = serial->dev;
774 mos7840_port->read_urb_busy = true;
775 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
778 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval);
779 mos7840_port->read_urb_busy = false;
783 /*****************************************************************************
784 * mos7840_bulk_out_data_callback
785 * this is the callback function for when we have finished sending
786 * serial data on the bulk out endpoint.
787 *****************************************************************************/
789 static void mos7840_bulk_out_data_callback(struct urb *urb)
791 struct moschip_port *mos7840_port;
792 struct tty_struct *tty;
793 int status = urb->status;
796 mos7840_port = urb->context;
797 spin_lock(&mos7840_port->pool_lock);
798 for (i = 0; i < NUM_URBS; i++) {
799 if (urb == mos7840_port->write_urb_pool[i]) {
800 mos7840_port->busy[i] = 0;
804 spin_unlock(&mos7840_port->pool_lock);
807 dbg("nonzero write bulk status received:%d", status);
811 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) {
812 dbg("%s", "Port Paranoia failed");
816 dbg("%s", "Entering .........");
818 tty = tty_port_tty_get(&mos7840_port->port->port);
819 if (tty && mos7840_port->open)
825 /************************************************************************/
826 /* 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 */
827 /************************************************************************/
828 #ifdef MCSSerialProbe
829 static int mos7840_serial_probe(struct usb_serial *serial,
830 const struct usb_device_id *id)
833 /*need to implement the mode_reg reading and updating\
834 structures usb_serial_ device_type\
835 (i.e num_ports, num_bulkin,bulkout etc) */
836 /* Also we can update the changes attach */
841 /*****************************************************************************
843 * this function is called by the tty driver when a port is opened
844 * If successful, we return 0
845 * Otherwise we return a negative error number.
846 *****************************************************************************/
848 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
852 struct usb_serial *serial;
856 struct moschip_port *mos7840_port;
857 struct moschip_port *port0;
859 dbg ("%s enter", __func__);
861 if (mos7840_port_paranoia_check(port, __func__)) {
862 dbg("%s", "Port Paranoia failed");
866 serial = port->serial;
868 if (mos7840_serial_paranoia_check(serial, __func__)) {
869 dbg("%s", "Serial Paranoia failed");
873 mos7840_port = mos7840_get_port_private(port);
874 port0 = mos7840_get_port_private(serial->port[0]);
876 if (mos7840_port == NULL || port0 == NULL)
879 usb_clear_halt(serial->dev, port->write_urb->pipe);
880 usb_clear_halt(serial->dev, port->read_urb->pipe);
883 /* Initialising the write urb pool */
884 for (j = 0; j < NUM_URBS; ++j) {
885 urb = usb_alloc_urb(0, GFP_KERNEL);
886 mos7840_port->write_urb_pool[j] = urb;
889 dev_err(&port->dev, "No more urbs???\n");
893 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
895 if (!urb->transfer_buffer) {
897 mos7840_port->write_urb_pool[j] = NULL;
899 "%s-out of memory for urb buffers.\n",
905 /*****************************************************************************
906 * Initialize MCS7840 -- Write Init values to corresponding Registers
914 * 0x08 : SP1/2 Control Reg
915 *****************************************************************************/
917 /* NEED to check the following Block */
920 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
922 dbg("Reading Spreg failed");
926 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
928 dbg("writing Spreg failed");
933 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
935 dbg("writing Spreg failed");
938 /* End of block to be checked */
941 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
944 dbg("Reading Controlreg failed");
947 Data |= 0x08; /* Driver done bit */
948 Data |= 0x20; /* rx_disable */
949 status = mos7840_set_reg_sync(port,
950 mos7840_port->ControlRegOffset, Data);
952 dbg("writing Controlreg failed");
955 /* do register settings here */
956 /* Set all regs to the device default values. */
957 /***********************************
958 * First Disable all interrupts.
959 ***********************************/
961 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
963 dbg("disabling interrupts failed");
966 /* Set FIFO_CONTROL_REGISTER to the default value */
968 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
970 dbg("Writing FIFO_CONTROL_REGISTER failed");
975 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
977 dbg("Writing FIFO_CONTROL_REGISTER failed");
982 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
983 mos7840_port->shadowLCR = Data;
986 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
987 mos7840_port->shadowMCR = Data;
990 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
991 mos7840_port->shadowLCR = Data;
993 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
994 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
997 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1000 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1003 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1005 Data = Data & ~SERIAL_LCR_DLAB;
1006 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1007 mos7840_port->shadowLCR = Data;
1009 /* clearing Bulkin and Bulkout Fifo */
1011 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1014 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1016 Data = Data & ~0x0c;
1017 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1018 /* Finally enable all interrupts */
1020 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1022 /* clearing rx_disable */
1024 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1026 Data = Data & ~0x20;
1027 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1032 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1035 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1038 /* Check to see if we've set up our endpoint info yet *
1039 * (can't set it up in mos7840_startup as the structures *
1040 * were not set up at that time.) */
1041 if (port0->open_ports == 1) {
1042 if (serial->port[0]->interrupt_in_buffer == NULL) {
1043 /* set up interrupt urb */
1044 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1046 usb_rcvintpipe(serial->dev,
1047 serial->port[0]->interrupt_in_endpointAddress),
1048 serial->port[0]->interrupt_in_buffer,
1049 serial->port[0]->interrupt_in_urb->
1050 transfer_buffer_length,
1051 mos7840_interrupt_callback,
1053 serial->port[0]->interrupt_in_urb->interval);
1055 /* start interrupt read for mos7840 *
1056 * will continue as long as mos7840 is connected */
1059 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1062 dev_err(&port->dev, "%s - Error %d submitting "
1063 "interrupt urb\n", __func__, response);
1070 /* see if we've set up our endpoint info yet *
1071 * (can't set it up in mos7840_startup as the *
1072 * structures were not set up at that time.) */
1074 dbg("port number is %d", port->number);
1075 dbg("serial number is %d", port->serial->minor);
1076 dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress);
1077 dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress);
1078 dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress);
1079 dbg("port's number in the device is %d", mos7840_port->port_num);
1080 mos7840_port->read_urb = port->read_urb;
1082 /* set up our bulk in urb */
1084 usb_fill_bulk_urb(mos7840_port->read_urb,
1086 usb_rcvbulkpipe(serial->dev,
1087 port->bulk_in_endpointAddress),
1088 port->bulk_in_buffer,
1089 mos7840_port->read_urb->transfer_buffer_length,
1090 mos7840_bulk_in_callback, mos7840_port);
1092 dbg("mos7840_open: bulkin endpoint is %d",
1093 port->bulk_in_endpointAddress);
1094 mos7840_port->read_urb_busy = true;
1095 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1097 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1098 __func__, response);
1099 mos7840_port->read_urb_busy = false;
1102 /* initialize our wait queues */
1103 init_waitqueue_head(&mos7840_port->wait_chase);
1104 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1106 /* initialize our icount structure */
1107 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1109 /* initialize our port settings */
1110 /* Must set to enable ints! */
1111 mos7840_port->shadowMCR = MCR_MASTER_IE;
1112 /* send a open port command */
1113 mos7840_port->open = 1;
1114 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1115 mos7840_port->icount.tx = 0;
1116 mos7840_port->icount.rx = 0;
1118 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p",
1119 serial, mos7840_port, port);
1121 dbg ("%s leave", __func__);
1127 /*****************************************************************************
1128 * mos7840_chars_in_buffer
1129 * this function is called by the tty driver when it wants to know how many
1130 * bytes of data we currently have outstanding in the port (data that has
1131 * been written, but hasn't made it out the port yet)
1132 * If successful, we return the number of bytes left to be written in the
1134 * Otherwise we return zero.
1135 *****************************************************************************/
1137 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1139 struct usb_serial_port *port = tty->driver_data;
1142 unsigned long flags;
1143 struct moschip_port *mos7840_port;
1145 dbg("%s", " mos7840_chars_in_buffer:entering ...........");
1147 if (mos7840_port_paranoia_check(port, __func__)) {
1148 dbg("%s", "Invalid port");
1152 mos7840_port = mos7840_get_port_private(port);
1153 if (mos7840_port == NULL) {
1154 dbg("%s", "mos7840_break:leaving ...........");
1158 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1159 for (i = 0; i < NUM_URBS; ++i)
1160 if (mos7840_port->busy[i])
1161 chars += URB_TRANSFER_BUFFER_SIZE;
1162 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1163 dbg("%s - returns %d", __func__, chars);
1168 /*****************************************************************************
1170 * this function is called by the tty driver when a port is closed
1171 *****************************************************************************/
1173 static void mos7840_close(struct usb_serial_port *port)
1175 struct usb_serial *serial;
1176 struct moschip_port *mos7840_port;
1177 struct moschip_port *port0;
1181 dbg("%s", "mos7840_close:entering...");
1183 if (mos7840_port_paranoia_check(port, __func__)) {
1184 dbg("%s", "Port Paranoia failed");
1188 serial = mos7840_get_usb_serial(port, __func__);
1190 dbg("%s", "Serial Paranoia failed");
1194 mos7840_port = mos7840_get_port_private(port);
1195 port0 = mos7840_get_port_private(serial->port[0]);
1197 if (mos7840_port == NULL || port0 == NULL)
1200 for (j = 0; j < NUM_URBS; ++j)
1201 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1203 /* Freeing Write URBs */
1204 for (j = 0; j < NUM_URBS; ++j) {
1205 if (mos7840_port->write_urb_pool[j]) {
1206 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1207 kfree(mos7840_port->write_urb_pool[j]->
1210 usb_free_urb(mos7840_port->write_urb_pool[j]);
1214 /* While closing port, shutdown all bulk read, write *
1215 * and interrupt read if they exists */
1217 if (mos7840_port->write_urb) {
1218 dbg("%s", "Shutdown bulk write");
1219 usb_kill_urb(mos7840_port->write_urb);
1221 if (mos7840_port->read_urb) {
1222 dbg("%s", "Shutdown bulk read");
1223 usb_kill_urb(mos7840_port->read_urb);
1224 mos7840_port->read_urb_busy = false;
1226 if ((&mos7840_port->control_urb)) {
1227 dbg("%s", "Shutdown control read");
1228 /*/ usb_kill_urb (mos7840_port->control_urb); */
1231 /* if(mos7840_port->ctrl_buf != NULL) */
1232 /* kfree(mos7840_port->ctrl_buf); */
1233 port0->open_ports--;
1234 dbg("mos7840_num_open_ports in close%d:in port%d",
1235 port0->open_ports, port->number);
1236 if (port0->open_ports == 0) {
1237 if (serial->port[0]->interrupt_in_urb) {
1238 dbg("%s", "Shutdown interrupt_in_urb");
1239 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1243 if (mos7840_port->write_urb) {
1244 /* if this urb had a transfer buffer already (old tx) free it */
1245 if (mos7840_port->write_urb->transfer_buffer != NULL)
1246 kfree(mos7840_port->write_urb->transfer_buffer);
1247 usb_free_urb(mos7840_port->write_urb);
1251 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1254 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1256 mos7840_port->open = 0;
1258 dbg("%s", "Leaving ............");
1261 /************************************************************************
1263 * mos7840_block_until_chase_response
1265 * This function will block the close until one of the following:
1266 * 1. Response to our Chase comes from mos7840
1267 * 2. A timeout of 10 seconds without activity has expired
1268 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1270 ************************************************************************/
1272 static void mos7840_block_until_chase_response(struct tty_struct *tty,
1273 struct moschip_port *mos7840_port)
1275 int timeout = 1 * HZ;
1280 count = mos7840_chars_in_buffer(tty);
1282 /* Check for Buffer status */
1286 /* Block the thread for a while */
1287 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1289 /* No activity.. count down section */
1292 dbg("%s - TIMEOUT", __func__);
1295 /* Reset timeout value back to seconds */
1302 /*****************************************************************************
1304 * this function sends a break to the port
1305 *****************************************************************************/
1306 static void mos7840_break(struct tty_struct *tty, int break_state)
1308 struct usb_serial_port *port = tty->driver_data;
1310 struct usb_serial *serial;
1311 struct moschip_port *mos7840_port;
1313 dbg("%s", "Entering ...........");
1314 dbg("mos7840_break: Start");
1316 if (mos7840_port_paranoia_check(port, __func__)) {
1317 dbg("%s", "Port Paranoia failed");
1321 serial = mos7840_get_usb_serial(port, __func__);
1323 dbg("%s", "Serial Paranoia failed");
1327 mos7840_port = mos7840_get_port_private(port);
1329 if (mos7840_port == NULL)
1333 /* flush and block until tx is empty */
1334 mos7840_block_until_chase_response(tty, mos7840_port);
1336 if (break_state == -1)
1337 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1339 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1341 /* FIXME: no locking on shadowLCR anywhere in driver */
1342 mos7840_port->shadowLCR = data;
1343 dbg("mcs7840_break mos7840_port->shadowLCR is %x",
1344 mos7840_port->shadowLCR);
1345 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1346 mos7840_port->shadowLCR);
1351 /*****************************************************************************
1352 * mos7840_write_room
1353 * this function is called by the tty driver when it wants to know how many
1354 * bytes of data we can accept for a specific port.
1355 * If successful, we return the amount of room that we have for this port
1356 * Otherwise we return a negative error number.
1357 *****************************************************************************/
1359 static int mos7840_write_room(struct tty_struct *tty)
1361 struct usb_serial_port *port = tty->driver_data;
1364 unsigned long flags;
1365 struct moschip_port *mos7840_port;
1367 dbg("%s", " mos7840_write_room:entering ...........");
1369 if (mos7840_port_paranoia_check(port, __func__)) {
1370 dbg("%s", "Invalid port");
1371 dbg("%s", " mos7840_write_room:leaving ...........");
1375 mos7840_port = mos7840_get_port_private(port);
1376 if (mos7840_port == NULL) {
1377 dbg("%s", "mos7840_break:leaving ...........");
1381 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1382 for (i = 0; i < NUM_URBS; ++i) {
1383 if (!mos7840_port->busy[i])
1384 room += URB_TRANSFER_BUFFER_SIZE;
1386 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1388 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1389 dbg("%s - returns %d", __func__, room);
1394 /*****************************************************************************
1396 * this function is called by the tty driver when data should be written to
1398 * If successful, we return the number of bytes written, otherwise we
1399 * return a negative error number.
1400 *****************************************************************************/
1402 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1403 const unsigned char *data, int count)
1409 unsigned long flags;
1411 struct moschip_port *mos7840_port;
1412 struct usb_serial *serial;
1415 const unsigned char *current_position = data;
1416 unsigned char *data1;
1417 dbg("%s", "entering ...........");
1418 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1419 mos7840_port->shadowLCR); */
1423 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1424 mos7840_port->shadowLCR = Data;
1425 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data);
1426 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1427 mos7840_port->shadowLCR);
1430 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1431 /* mos7840_port->shadowLCR=Data;//Need to add later */
1433 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1434 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1437 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1439 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1440 dbg("mos7840_write:DLL value is %x", Data);
1443 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1444 dbg("mos7840_write:DLM value is %x", Data);
1446 Data = Data & ~SERIAL_LCR_DLAB;
1447 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1448 mos7840_port->shadowLCR);
1449 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1452 if (mos7840_port_paranoia_check(port, __func__)) {
1453 dbg("%s", "Port Paranoia failed");
1457 serial = port->serial;
1458 if (mos7840_serial_paranoia_check(serial, __func__)) {
1459 dbg("%s", "Serial Paranoia failed");
1463 mos7840_port = mos7840_get_port_private(port);
1464 if (mos7840_port == NULL) {
1465 dbg("%s", "mos7840_port is NULL");
1469 /* try to find a free urb in the list */
1472 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1473 for (i = 0; i < NUM_URBS; ++i) {
1474 if (!mos7840_port->busy[i]) {
1475 mos7840_port->busy[i] = 1;
1476 urb = mos7840_port->write_urb_pool[i];
1481 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1484 dbg("%s - no more free urbs", __func__);
1488 if (urb->transfer_buffer == NULL) {
1489 urb->transfer_buffer =
1490 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1492 if (urb->transfer_buffer == NULL) {
1493 dev_err(&port->dev, "%s no more kernel memory...\n",
1498 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1500 memcpy(urb->transfer_buffer, current_position, transfer_size);
1502 /* fill urb with data and submit */
1503 usb_fill_bulk_urb(urb,
1505 usb_sndbulkpipe(serial->dev,
1506 port->bulk_out_endpointAddress),
1507 urb->transfer_buffer,
1509 mos7840_bulk_out_data_callback, mos7840_port);
1511 data1 = urb->transfer_buffer;
1512 dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress);
1514 /* send it down the pipe */
1515 status = usb_submit_urb(urb, GFP_ATOMIC);
1518 mos7840_port->busy[i] = 0;
1519 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
1520 "with status = %d\n", __func__, status);
1521 bytes_sent = status;
1524 bytes_sent = transfer_size;
1525 mos7840_port->icount.tx += transfer_size;
1527 dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx);
1533 /*****************************************************************************
1535 * this function is called by the tty driver when it wants to stop the data
1536 * being read from the port.
1537 *****************************************************************************/
1539 static void mos7840_throttle(struct tty_struct *tty)
1541 struct usb_serial_port *port = tty->driver_data;
1542 struct moschip_port *mos7840_port;
1545 if (mos7840_port_paranoia_check(port, __func__)) {
1546 dbg("%s", "Invalid port");
1550 dbg("- port %d", port->number);
1552 mos7840_port = mos7840_get_port_private(port);
1554 if (mos7840_port == NULL)
1557 if (!mos7840_port->open) {
1558 dbg("%s", "port not opened");
1562 dbg("%s", "Entering ..........");
1564 /* if we are implementing XON/XOFF, send the stop character */
1566 unsigned char stop_char = STOP_CHAR(tty);
1567 status = mos7840_write(tty, port, &stop_char, 1);
1571 /* if we are implementing RTS/CTS, toggle that line */
1572 if (tty->termios->c_cflag & CRTSCTS) {
1573 mos7840_port->shadowMCR &= ~MCR_RTS;
1574 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1575 mos7840_port->shadowMCR);
1583 /*****************************************************************************
1584 * mos7840_unthrottle
1585 * this function is called by the tty driver when it wants to resume
1586 * the data being read from the port (called after mos7840_throttle is
1588 *****************************************************************************/
1589 static void mos7840_unthrottle(struct tty_struct *tty)
1591 struct usb_serial_port *port = tty->driver_data;
1593 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1595 if (mos7840_port_paranoia_check(port, __func__)) {
1596 dbg("%s", "Invalid port");
1600 if (mos7840_port == NULL)
1603 if (!mos7840_port->open) {
1604 dbg("%s - port not opened", __func__);
1608 dbg("%s", "Entering ..........");
1610 /* if we are implementing XON/XOFF, send the start character */
1612 unsigned char start_char = START_CHAR(tty);
1613 status = mos7840_write(tty, port, &start_char, 1);
1618 /* if we are implementing RTS/CTS, toggle that line */
1619 if (tty->termios->c_cflag & CRTSCTS) {
1620 mos7840_port->shadowMCR |= MCR_RTS;
1621 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1622 mos7840_port->shadowMCR);
1628 static int mos7840_tiocmget(struct tty_struct *tty, struct file *file)
1630 struct usb_serial_port *port = tty->driver_data;
1631 struct moschip_port *mos7840_port;
1632 unsigned int result;
1636 mos7840_port = mos7840_get_port_private(port);
1638 dbg("%s - port %d", __func__, port->number);
1640 if (mos7840_port == NULL)
1643 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1644 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1645 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1646 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1647 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1648 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1649 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1650 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1651 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1653 dbg("%s - 0x%04X", __func__, result);
1658 static int mos7840_tiocmset(struct tty_struct *tty, struct file *file,
1659 unsigned int set, unsigned int clear)
1661 struct usb_serial_port *port = tty->driver_data;
1662 struct moschip_port *mos7840_port;
1666 dbg("%s - port %d", __func__, port->number);
1668 mos7840_port = mos7840_get_port_private(port);
1670 if (mos7840_port == NULL)
1673 /* FIXME: What locks the port registers ? */
1674 mcr = mos7840_port->shadowMCR;
1675 if (clear & TIOCM_RTS)
1677 if (clear & TIOCM_DTR)
1679 if (clear & TIOCM_LOOP)
1680 mcr &= ~MCR_LOOPBACK;
1682 if (set & TIOCM_RTS)
1684 if (set & TIOCM_DTR)
1686 if (set & TIOCM_LOOP)
1687 mcr |= MCR_LOOPBACK;
1689 mos7840_port->shadowMCR = mcr;
1691 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1693 dbg("setting MODEM_CONTROL_REGISTER Failed");
1700 /*****************************************************************************
1701 * mos7840_calc_baud_rate_divisor
1702 * this function calculates the proper baud rate divisor for the specified
1704 *****************************************************************************/
1705 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
1709 dbg("%s - %d", __func__, baudRate);
1711 if (baudRate <= 115200) {
1712 *divisor = 115200 / baudRate;
1715 if ((baudRate > 115200) && (baudRate <= 230400)) {
1716 *divisor = 230400 / baudRate;
1717 *clk_sel_val = 0x10;
1718 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1719 *divisor = 403200 / baudRate;
1720 *clk_sel_val = 0x20;
1721 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1722 *divisor = 460800 / baudRate;
1723 *clk_sel_val = 0x30;
1724 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1725 *divisor = 806400 / baudRate;
1726 *clk_sel_val = 0x40;
1727 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1728 *divisor = 921600 / baudRate;
1729 *clk_sel_val = 0x50;
1730 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1731 *divisor = 1572864 / baudRate;
1732 *clk_sel_val = 0x60;
1733 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1734 *divisor = 3145728 / baudRate;
1735 *clk_sel_val = 0x70;
1741 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1742 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1743 *divisor = mos7840_divisor_table[i].Divisor;
1748 /* After trying for all the standard baud rates *
1749 * Try calculating the divisor for this baud rate */
1751 if (baudrate > 75 && baudrate < 230400) {
1752 /* get the divisor */
1753 custom = (__u16) (230400L / baudrate);
1755 /* Check for round off */
1756 round1 = (__u16) (2304000L / baudrate);
1757 round = (__u16) (round1 - (custom * 10));
1762 dbg(" Baud %d = %d", baudrate, custom);
1766 dbg("%s", " Baud calculation Failed...");
1771 /*****************************************************************************
1772 * mos7840_send_cmd_write_baud_rate
1773 * this function sends the proper command to change the baud rate of the
1775 *****************************************************************************/
1777 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1783 unsigned char number;
1785 struct usb_serial_port *port;
1787 if (mos7840_port == NULL)
1790 port = (struct usb_serial_port *)mos7840_port->port;
1791 if (mos7840_port_paranoia_check(port, __func__)) {
1792 dbg("%s", "Invalid port");
1796 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
1797 dbg("%s", "Invalid Serial");
1801 dbg("%s", "Entering ..........");
1803 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1805 dbg("%s - port = %d, baud = %d", __func__,
1806 mos7840_port->port->number, baudRate);
1807 /* reset clk_uart_sel in spregOffset */
1808 if (baudRate > 115200) {
1809 #ifdef HW_flow_control
1810 /* NOTE: need to see the pther register to modify */
1811 /* setting h/w flow control bit to 1 */
1813 mos7840_port->shadowMCR = Data;
1814 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1817 dbg("Writing spreg failed in set_serial_baud");
1823 #ifdef HW_flow_control
1824 / *setting h/w flow control bit to 0 */
1826 mos7840_port->shadowMCR = Data;
1827 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1830 dbg("Writing spreg failed in set_serial_baud");
1837 if (1) { /* baudRate <= 115200) */
1840 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor,
1842 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1845 dbg("reading spreg failed in set_serial_baud");
1848 Data = (Data & 0x8f) | clk_sel_val;
1849 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1852 dbg("Writing spreg failed in set_serial_baud");
1855 /* Calculate the Divisor */
1858 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1861 /* Enable access to divisor latch */
1862 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1863 mos7840_port->shadowLCR = Data;
1864 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1866 /* Write the divisor */
1867 Data = (unsigned char)(divisor & 0xff);
1868 dbg("set_serial_baud Value to write DLL is %x", Data);
1869 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1871 Data = (unsigned char)((divisor & 0xff00) >> 8);
1872 dbg("set_serial_baud Value to write DLM is %x", Data);
1873 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1875 /* Disable access to divisor latch */
1876 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1877 mos7840_port->shadowLCR = Data;
1878 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1884 /*****************************************************************************
1885 * mos7840_change_port_settings
1886 * This routine is called to set the UART on the device to match
1887 * the specified new settings.
1888 *****************************************************************************/
1890 static void mos7840_change_port_settings(struct tty_struct *tty,
1891 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1901 struct usb_serial_port *port;
1902 struct usb_serial *serial;
1904 if (mos7840_port == NULL)
1907 port = (struct usb_serial_port *)mos7840_port->port;
1909 if (mos7840_port_paranoia_check(port, __func__)) {
1910 dbg("%s", "Invalid port");
1914 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
1915 dbg("%s", "Invalid Serial");
1919 serial = port->serial;
1921 dbg("%s - port %d", __func__, mos7840_port->port->number);
1923 if (!mos7840_port->open) {
1924 dbg("%s - port not opened", __func__);
1928 dbg("%s", "Entering ..........");
1932 lParity = LCR_PAR_NONE;
1934 cflag = tty->termios->c_cflag;
1935 iflag = tty->termios->c_iflag;
1937 /* Change the number of bits */
1938 if (cflag & CSIZE) {
1939 switch (cflag & CSIZE) {
1957 /* Change the Parity bit */
1958 if (cflag & PARENB) {
1959 if (cflag & PARODD) {
1960 lParity = LCR_PAR_ODD;
1961 dbg("%s - parity = odd", __func__);
1963 lParity = LCR_PAR_EVEN;
1964 dbg("%s - parity = even", __func__);
1968 dbg("%s - parity = none", __func__);
1972 lParity = lParity | 0x20;
1974 /* Change the Stop bit */
1975 if (cflag & CSTOPB) {
1977 dbg("%s - stop bits = 2", __func__);
1980 dbg("%s - stop bits = 1", __func__);
1983 /* Update the LCR with the correct value */
1984 mos7840_port->shadowLCR &=
1985 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1986 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1988 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x",
1989 mos7840_port->shadowLCR);
1990 /* Disable Interrupts */
1992 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1995 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1998 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2000 /* Send the updated LCR value to the mos7840 */
2001 Data = mos7840_port->shadowLCR;
2003 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2006 mos7840_port->shadowMCR = Data;
2007 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2009 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2011 /* set up the MCR register and send it to the mos7840 */
2013 mos7840_port->shadowMCR = MCR_MASTER_IE;
2015 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2017 if (cflag & CRTSCTS)
2018 mos7840_port->shadowMCR |= (MCR_XON_ANY);
2020 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
2022 Data = mos7840_port->shadowMCR;
2023 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2025 /* Determine divisor based on baud rate */
2026 baud = tty_get_baud_rate(tty);
2029 /* pick a default, any default... */
2030 dbg("%s", "Picked default baud...");
2034 dbg("%s - baud rate = %d", __func__, baud);
2035 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2037 /* Enable Interrupts */
2039 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2041 if (mos7840_port->read_urb_busy == false) {
2042 mos7840_port->read_urb->dev = serial->dev;
2043 mos7840_port->read_urb_busy = true;
2044 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2046 dbg("usb_submit_urb(read bulk) failed, status = %d",
2048 mos7840_port->read_urb_busy = false;
2051 wake_up(&mos7840_port->delta_msr_wait);
2052 mos7840_port->delta_msr_cond = 1;
2053 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x",
2054 mos7840_port->shadowLCR);
2059 /*****************************************************************************
2060 * mos7840_set_termios
2061 * this function is called by the tty driver when it wants to change
2062 * the termios structure
2063 *****************************************************************************/
2065 static void mos7840_set_termios(struct tty_struct *tty,
2066 struct usb_serial_port *port,
2067 struct ktermios *old_termios)
2071 struct usb_serial *serial;
2072 struct moschip_port *mos7840_port;
2073 dbg("mos7840_set_termios: START");
2074 if (mos7840_port_paranoia_check(port, __func__)) {
2075 dbg("%s", "Invalid port");
2079 serial = port->serial;
2081 if (mos7840_serial_paranoia_check(serial, __func__)) {
2082 dbg("%s", "Invalid Serial");
2086 mos7840_port = mos7840_get_port_private(port);
2088 if (mos7840_port == NULL)
2091 if (!mos7840_port->open) {
2092 dbg("%s - port not opened", __func__);
2096 dbg("%s", "setting termios - ");
2098 cflag = tty->termios->c_cflag;
2100 dbg("%s - clfag %08x iflag %08x", __func__,
2101 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
2102 dbg("%s - old clfag %08x old iflag %08x", __func__,
2103 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2104 dbg("%s - port %d", __func__, port->number);
2106 /* change the port settings to the new ones specified */
2108 mos7840_change_port_settings(tty, mos7840_port, old_termios);
2110 if (!mos7840_port->read_urb) {
2111 dbg("%s", "URB KILLED !!!!!");
2115 if (mos7840_port->read_urb_busy == false) {
2116 mos7840_port->read_urb->dev = serial->dev;
2117 mos7840_port->read_urb_busy = true;
2118 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2120 dbg("usb_submit_urb(read bulk) failed, status = %d",
2122 mos7840_port->read_urb_busy = false;
2128 /*****************************************************************************
2129 * mos7840_get_lsr_info - get line status register info
2131 * Purpose: Let user call ioctl() to get info when the UART physically
2132 * is emptied. On bus types like RS485, the transmitter must
2133 * release the bus after transmitting. This must be done when
2134 * the transmit shift register is empty, not be done when the
2135 * transmit holding register is empty. This functionality
2136 * allows an RS485 driver to be written in user space.
2137 *****************************************************************************/
2139 static int mos7840_get_lsr_info(struct tty_struct *tty,
2140 unsigned int __user *value)
2143 unsigned int result = 0;
2145 count = mos7840_chars_in_buffer(tty);
2147 dbg("%s -- Empty", __func__);
2148 result = TIOCSER_TEMT;
2151 if (copy_to_user(value, &result, sizeof(int)))
2156 /*****************************************************************************
2157 * mos7840_get_serial_info
2158 * function to get information about serial port
2159 *****************************************************************************/
2161 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2162 struct serial_struct __user *retinfo)
2164 struct serial_struct tmp;
2166 if (mos7840_port == NULL)
2172 memset(&tmp, 0, sizeof(tmp));
2174 tmp.type = PORT_16550A;
2175 tmp.line = mos7840_port->port->serial->minor;
2176 tmp.port = mos7840_port->port->number;
2178 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2179 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2180 tmp.baud_base = 9600;
2181 tmp.close_delay = 5 * HZ;
2182 tmp.closing_wait = 30 * HZ;
2184 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2189 /*****************************************************************************
2191 * this function handles any ioctl calls to the driver
2192 *****************************************************************************/
2194 static int mos7840_ioctl(struct tty_struct *tty, struct file *file,
2195 unsigned int cmd, unsigned long arg)
2197 struct usb_serial_port *port = tty->driver_data;
2198 void __user *argp = (void __user *)arg;
2199 struct moschip_port *mos7840_port;
2201 struct async_icount cnow;
2202 struct async_icount cprev;
2203 struct serial_icounter_struct icount;
2205 if (mos7840_port_paranoia_check(port, __func__)) {
2206 dbg("%s", "Invalid port");
2210 mos7840_port = mos7840_get_port_private(port);
2212 if (mos7840_port == NULL)
2215 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
2218 /* return number of bytes available */
2221 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
2222 return mos7840_get_lsr_info(tty, argp);
2226 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
2227 return mos7840_get_serial_info(mos7840_port, argp);
2230 dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
2234 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
2235 cprev = mos7840_port->icount;
2237 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2238 mos7840_port->delta_msr_cond = 0;
2239 wait_event_interruptible(mos7840_port->delta_msr_wait,
2241 delta_msr_cond == 1));
2243 /* see if a signal did it */
2244 if (signal_pending(current))
2245 return -ERESTARTSYS;
2246 cnow = mos7840_port->icount;
2248 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2249 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2250 return -EIO; /* no change => error */
2251 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2252 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2253 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2254 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2263 cnow = mos7840_port->icount;
2265 icount.cts = cnow.cts;
2266 icount.dsr = cnow.dsr;
2267 icount.rng = cnow.rng;
2268 icount.dcd = cnow.dcd;
2269 icount.rx = cnow.rx;
2270 icount.tx = cnow.tx;
2271 icount.frame = cnow.frame;
2272 icount.overrun = cnow.overrun;
2273 icount.parity = cnow.parity;
2274 icount.brk = cnow.brk;
2275 icount.buf_overrun = cnow.buf_overrun;
2277 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
2278 port->number, icount.rx, icount.tx);
2279 if (copy_to_user(argp, &icount, sizeof(icount)))
2285 return -ENOIOCTLCMD;
2288 static int mos7840_calc_num_ports(struct usb_serial *serial)
2290 int mos7840_num_ports = 0;
2292 dbg("numberofendpoints: cur %d, alt %d",
2293 (int)serial->interface->cur_altsetting->desc.bNumEndpoints,
2294 (int)serial->interface->altsetting->desc.bNumEndpoints);
2295 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) {
2296 mos7840_num_ports = serial->num_ports = 2;
2297 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) {
2298 serial->num_bulk_in = 4;
2299 serial->num_bulk_out = 4;
2300 mos7840_num_ports = serial->num_ports = 4;
2302 dbg ("mos7840_num_ports = %d", mos7840_num_ports);
2303 return mos7840_num_ports;
2306 /****************************************************************************
2308 ****************************************************************************/
2310 static int mos7840_startup(struct usb_serial *serial)
2312 struct moschip_port *mos7840_port;
2313 struct usb_device *dev;
2317 dbg("%s", "mos7840_startup :Entering..........");
2320 dbg("%s", "Invalid Handler");
2326 dbg("%s", "Entering...");
2327 dbg ("mos7840_startup: serial = %p", serial);
2329 /* we set up the pointers to the endpoints in the mos7840_open *
2330 * function, as the structures aren't created yet. */
2332 /* set up port private structures */
2333 for (i = 0; i < serial->num_ports; ++i) {
2334 dbg ("mos7840_startup: configuring port %d............", i);
2335 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2336 if (mos7840_port == NULL) {
2337 dev_err(&dev->dev, "%s - Out of memory\n", __func__);
2339 i--; /* don't follow NULL pointer cleaning up */
2343 /* Initialize all port interrupt end point to port 0 int
2344 * endpoint. Our device has only one interrupt end point
2345 * common to all port */
2347 mos7840_port->port = serial->port[i];
2348 mos7840_set_port_private(serial->port[i], mos7840_port);
2349 spin_lock_init(&mos7840_port->pool_lock);
2351 /* minor is not initialised until later by
2352 * usb-serial.c:get_free_serial() and cannot therefore be used
2353 * to index device instances */
2354 mos7840_port->port_num = i + 1;
2355 dbg ("serial->port[i]->number = %d", serial->port[i]->number);
2356 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor);
2357 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num);
2358 dbg ("serial->minor = %d", serial->minor);
2360 if (mos7840_port->port_num == 1) {
2361 mos7840_port->SpRegOffset = 0x0;
2362 mos7840_port->ControlRegOffset = 0x1;
2363 mos7840_port->DcrRegOffset = 0x4;
2364 } else if ((mos7840_port->port_num == 2)
2365 && (serial->num_ports == 4)) {
2366 mos7840_port->SpRegOffset = 0x8;
2367 mos7840_port->ControlRegOffset = 0x9;
2368 mos7840_port->DcrRegOffset = 0x16;
2369 } else if ((mos7840_port->port_num == 2)
2370 && (serial->num_ports == 2)) {
2371 mos7840_port->SpRegOffset = 0xa;
2372 mos7840_port->ControlRegOffset = 0xb;
2373 mos7840_port->DcrRegOffset = 0x19;
2374 } else if ((mos7840_port->port_num == 3)
2375 && (serial->num_ports == 4)) {
2376 mos7840_port->SpRegOffset = 0xa;
2377 mos7840_port->ControlRegOffset = 0xb;
2378 mos7840_port->DcrRegOffset = 0x19;
2379 } else if ((mos7840_port->port_num == 4)
2380 && (serial->num_ports == 4)) {
2381 mos7840_port->SpRegOffset = 0xc;
2382 mos7840_port->ControlRegOffset = 0xd;
2383 mos7840_port->DcrRegOffset = 0x1c;
2385 mos7840_dump_serial_port(mos7840_port);
2386 mos7840_set_port_private(serial->port[i], mos7840_port);
2388 /* enable rx_disable bit in control register */
2389 status = mos7840_get_reg_sync(serial->port[i],
2390 mos7840_port->ControlRegOffset, &Data);
2392 dbg("Reading ControlReg failed status-0x%x", status);
2395 dbg("ControlReg Reading success val is %x, status%d",
2397 Data |= 0x08; /* setting driver done bit */
2398 Data |= 0x04; /* sp1_bit to have cts change reflect in
2401 /* Data |= 0x20; //rx_disable bit */
2402 status = mos7840_set_reg_sync(serial->port[i],
2403 mos7840_port->ControlRegOffset, Data);
2405 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status);
2408 dbg("ControlReg Writing success(rx_disable) status%d",
2411 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2414 status = mos7840_set_reg_sync(serial->port[i],
2415 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2417 dbg("Writing DCR0 failed status-0x%x", status);
2420 dbg("DCR0 Writing success status%d", status);
2423 status = mos7840_set_reg_sync(serial->port[i],
2424 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2426 dbg("Writing DCR1 failed status-0x%x", status);
2429 dbg("DCR1 Writing success status%d", status);
2432 status = mos7840_set_reg_sync(serial->port[i],
2433 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2435 dbg("Writing DCR2 failed status-0x%x", status);
2438 dbg("DCR2 Writing success status%d", status);
2440 /* write values in clkstart0x0 and clkmulti 0x20 */
2442 status = mos7840_set_reg_sync(serial->port[i],
2443 CLK_START_VALUE_REGISTER, Data);
2445 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status);
2448 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status);
2451 status = mos7840_set_reg_sync(serial->port[i],
2452 CLK_MULTI_REGISTER, Data);
2454 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x",
2458 dbg("CLK_MULTI_REGISTER Writing success status%d",
2461 /* write value 0x0 to scratchpad register */
2463 status = mos7840_set_uart_reg(serial->port[i],
2464 SCRATCH_PAD_REGISTER, Data);
2466 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x",
2470 dbg("SCRATCH_PAD_REGISTER Writing success status%d",
2473 /* Zero Length flag register */
2474 if ((mos7840_port->port_num != 1)
2475 && (serial->num_ports == 2)) {
2478 status = mos7840_set_reg_sync(serial->port[i],
2480 ((__u16)mos7840_port->port_num)), Data);
2481 dbg("ZLIP offset %x",
2483 ((__u16) mos7840_port->port_num)));
2485 dbg("Writing ZLP_REG%d failed status-0x%x",
2489 dbg("ZLP_REG%d Writing success status%d",
2493 status = mos7840_set_reg_sync(serial->port[i],
2495 ((__u16)mos7840_port->port_num) - 0x1), Data);
2496 dbg("ZLIP offset %x",
2498 ((__u16) mos7840_port->port_num) - 0x1));
2500 dbg("Writing ZLP_REG%d failed status-0x%x",
2504 dbg("ZLP_REG%d Writing success status%d",
2508 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2509 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2510 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2512 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2513 !mos7840_port->dr) {
2518 dbg ("mos7840_startup: all ports configured...........");
2520 /* Zero Length flag enable */
2522 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2524 dbg("Writing ZLP_REG5 failed status-0x%x", status);
2527 dbg("ZLP_REG5 Writing success status%d", status);
2529 /* setting configuration feature to one */
2530 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2531 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
2534 for (/* nothing */; i >= 0; i--) {
2535 mos7840_port = mos7840_get_port_private(serial->port[i]);
2537 kfree(mos7840_port->dr);
2538 kfree(mos7840_port->ctrl_buf);
2539 usb_free_urb(mos7840_port->control_urb);
2540 kfree(mos7840_port);
2541 serial->port[i] = NULL;
2546 /****************************************************************************
2547 * mos7840_disconnect
2548 * This function is called whenever the device is removed from the usb bus.
2549 ****************************************************************************/
2551 static void mos7840_disconnect(struct usb_serial *serial)
2554 unsigned long flags;
2555 struct moschip_port *mos7840_port;
2556 dbg("%s", " disconnect :entering..........");
2559 dbg("%s", "Invalid Handler");
2563 /* check for the ports to be closed,close the ports and disconnect */
2565 /* free private structure allocated for serial port *
2566 * stop reads and writes on all ports */
2568 for (i = 0; i < serial->num_ports; ++i) {
2569 mos7840_port = mos7840_get_port_private(serial->port[i]);
2570 dbg ("mos7840_port %d = %p", i, mos7840_port);
2572 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
2573 mos7840_port->zombie = 1;
2574 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
2575 usb_kill_urb(mos7840_port->control_urb);
2579 dbg("%s", "Thank u :: ");
2583 /****************************************************************************
2585 * This function is called when the usb_serial structure is freed.
2586 ****************************************************************************/
2588 static void mos7840_release(struct usb_serial *serial)
2591 struct moschip_port *mos7840_port;
2592 dbg("%s", " release :entering..........");
2595 dbg("%s", "Invalid Handler");
2599 /* check for the ports to be closed,close the ports and disconnect */
2601 /* free private structure allocated for serial port *
2602 * stop reads and writes on all ports */
2604 for (i = 0; i < serial->num_ports; ++i) {
2605 mos7840_port = mos7840_get_port_private(serial->port[i]);
2606 dbg("mos7840_port %d = %p", i, mos7840_port);
2608 kfree(mos7840_port->ctrl_buf);
2609 kfree(mos7840_port->dr);
2610 kfree(mos7840_port);
2614 dbg("%s", "Thank u :: ");
2618 static struct usb_driver io_driver = {
2620 .probe = usb_serial_probe,
2621 .disconnect = usb_serial_disconnect,
2622 .id_table = moschip_id_table_combined,
2626 static struct usb_serial_driver moschip7840_4port_device = {
2628 .owner = THIS_MODULE,
2631 .description = DRIVER_DESC,
2632 .usb_driver = &io_driver,
2633 .id_table = moschip_port_id_table,
2635 .open = mos7840_open,
2636 .close = mos7840_close,
2637 .write = mos7840_write,
2638 .write_room = mos7840_write_room,
2639 .chars_in_buffer = mos7840_chars_in_buffer,
2640 .throttle = mos7840_throttle,
2641 .unthrottle = mos7840_unthrottle,
2642 .calc_num_ports = mos7840_calc_num_ports,
2643 #ifdef MCSSerialProbe
2644 .probe = mos7840_serial_probe,
2646 .ioctl = mos7840_ioctl,
2647 .set_termios = mos7840_set_termios,
2648 .break_ctl = mos7840_break,
2649 .tiocmget = mos7840_tiocmget,
2650 .tiocmset = mos7840_tiocmset,
2651 .attach = mos7840_startup,
2652 .disconnect = mos7840_disconnect,
2653 .release = mos7840_release,
2654 .read_bulk_callback = mos7840_bulk_in_callback,
2655 .read_int_callback = mos7840_interrupt_callback,
2658 /****************************************************************************
2660 * This is called by the module subsystem, or on startup to initialize us
2661 ****************************************************************************/
2662 static int __init moschip7840_init(void)
2666 dbg("%s", " mos7840_init :entering..........");
2668 /* Register with the usb serial */
2669 retval = usb_serial_register(&moschip7840_4port_device);
2672 goto failed_port_device_register;
2674 dbg("%s", "Entering...");
2675 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
2678 /* Register with the usb */
2679 retval = usb_register(&io_driver);
2681 dbg("%s", "Leaving...");
2684 usb_serial_deregister(&moschip7840_4port_device);
2685 failed_port_device_register:
2689 /****************************************************************************
2691 * Called when the driver is about to be unloaded.
2692 ****************************************************************************/
2693 static void __exit moschip7840_exit(void)
2696 dbg("%s", " mos7840_exit :entering..........");
2698 usb_deregister(&io_driver);
2700 usb_serial_deregister(&moschip7840_4port_device);
2702 dbg("%s", "Entering...");
2705 module_init(moschip7840_init);
2706 module_exit(moschip7840_exit);
2708 /* Module information */
2709 MODULE_DESCRIPTION(DRIVER_DESC);
2710 MODULE_LICENSE("GPL");
2712 module_param(debug, bool, S_IRUGO | S_IWUSR);
2713 MODULE_PARM_DESC(debug, "Debug enabled or not");