2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 * Clean ups from Moschip version and a few ioctl implementations by:
17 * Paul B Schroeder <pschroeder "at" uplogix "dot" com>
19 * Originally based on drivers/usb/serial/io_edgeport.c which is:
20 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
25 #include <linux/kernel.h>
26 #include <linux/errno.h>
27 #include <linux/init.h>
28 #include <linux/slab.h>
29 #include <linux/tty.h>
30 #include <linux/tty_driver.h>
31 #include <linux/tty_flip.h>
32 #include <linux/module.h>
33 #include <linux/serial.h>
34 #include <linux/usb.h>
35 #include <linux/usb/serial.h>
36 #include <linux/uaccess.h>
41 #define DRIVER_VERSION "1.3.2"
42 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
45 * 16C50 UART register defines
48 #define LCR_BITS_5 0x00 /* 5 bits/char */
49 #define LCR_BITS_6 0x01 /* 6 bits/char */
50 #define LCR_BITS_7 0x02 /* 7 bits/char */
51 #define LCR_BITS_8 0x03 /* 8 bits/char */
52 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
54 #define LCR_STOP_1 0x00 /* 1 stop bit */
55 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
56 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
57 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
59 #define LCR_PAR_NONE 0x00 /* No parity */
60 #define LCR_PAR_ODD 0x08 /* Odd parity */
61 #define LCR_PAR_EVEN 0x18 /* Even parity */
62 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
63 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
64 #define LCR_PAR_MASK 0x38 /* Mask for parity field */
66 #define LCR_SET_BREAK 0x40 /* Set Break condition */
67 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
69 #define MCR_DTR 0x01 /* Assert DTR */
70 #define MCR_RTS 0x02 /* Assert RTS */
71 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
72 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
73 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
74 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
76 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
77 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
78 #define MOS7840_MSR_RI 0x40 /* Current state of RI */
79 #define MOS7840_MSR_CD 0x80 /* Current state of CD */
82 * Defines used for sending commands to port
85 #define WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */
86 #define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */
88 #define MOS_PORT1 0x0200
89 #define MOS_PORT2 0x0300
90 #define MOS_VENREG 0x0000
91 #define MOS_MAX_PORT 0x02
92 #define MOS_WRITE 0x0E
96 #define MCS_RD_RTYPE 0xC0
97 #define MCS_WR_RTYPE 0x40
98 #define MCS_RDREQ 0x0D
99 #define MCS_WRREQ 0x0E
100 #define MCS_CTRL_TIMEOUT 500
101 #define VENDOR_READ_LENGTH (0x01)
103 #define MAX_NAME_LEN 64
105 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
106 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
108 /* For higher baud Rates use TIOCEXBAUD */
109 #define TIOCEXBAUD 0x5462
111 /* vendor id and device id defines */
113 /* The native mos7840/7820 component */
114 #define USB_VENDOR_ID_MOSCHIP 0x9710
115 #define MOSCHIP_DEVICE_ID_7840 0x7840
116 #define MOSCHIP_DEVICE_ID_7820 0x7820
117 /* 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_USO9ML2_2 0xAC22
124 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00
125 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
126 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01
127 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29
128 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30
129 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31
130 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32
131 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
132 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02
133 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
134 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
135 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
137 /* This driver also supports
138 * ATEN UC2324 device using Moschip MCS7840
139 * ATEN UC2322 device using Moschip MCS7820
141 #define USB_VENDOR_ID_ATENINTL 0x0557
142 #define ATENINTL_DEVICE_ID_UC2324 0x2011
143 #define ATENINTL_DEVICE_ID_UC2322 0x7820
145 /* Interrupt Routine Defines */
147 #define SERIAL_IIR_RLS 0x06
148 #define SERIAL_IIR_MS 0x00
151 * Emulation of the bit mask on the LINE STATUS REGISTER.
153 #define SERIAL_LSR_DR 0x0001
154 #define SERIAL_LSR_OE 0x0002
155 #define SERIAL_LSR_PE 0x0004
156 #define SERIAL_LSR_FE 0x0008
157 #define SERIAL_LSR_BI 0x0010
159 #define MOS_MSR_DELTA_CTS 0x10
160 #define MOS_MSR_DELTA_DSR 0x20
161 #define MOS_MSR_DELTA_RI 0x40
162 #define MOS_MSR_DELTA_CD 0x80
164 /* Serial Port register Address */
165 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
166 #define FIFO_CONTROL_REGISTER ((__u16)(0x02))
167 #define LINE_CONTROL_REGISTER ((__u16)(0x03))
168 #define MODEM_CONTROL_REGISTER ((__u16)(0x04))
169 #define LINE_STATUS_REGISTER ((__u16)(0x05))
170 #define MODEM_STATUS_REGISTER ((__u16)(0x06))
171 #define SCRATCH_PAD_REGISTER ((__u16)(0x07))
172 #define DIVISOR_LATCH_LSB ((__u16)(0x00))
173 #define DIVISOR_LATCH_MSB ((__u16)(0x01))
175 #define CLK_MULTI_REGISTER ((__u16)(0x02))
176 #define CLK_START_VALUE_REGISTER ((__u16)(0x03))
178 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
181 * URB POOL related defines
183 #define NUM_URBS 16 /* URB Count */
184 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
187 static const struct usb_device_id moschip_port_id_table[] = {
188 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
189 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
190 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
191 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
192 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
193 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
194 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
203 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
204 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
205 {} /* terminating entry */
208 static const struct usb_device_id moschip_id_table_combined[] __devinitconst = {
209 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
210 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
211 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
212 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
213 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
214 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
215 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
216 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
217 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
218 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
219 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
220 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
221 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
222 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
223 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
224 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
225 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
226 {} /* terminating entry */
229 MODULE_DEVICE_TABLE(usb, moschip_id_table_combined);
231 /* This structure holds all of the local port information */
233 struct moschip_port {
234 int port_num; /*Actual port number in the device(1,2,etc) */
235 struct urb *write_urb; /* write URB for this port */
236 struct urb *read_urb; /* read URB for this port */
238 __u8 shadowLCR; /* last LCR value received */
239 __u8 shadowMCR; /* last MCR value received */
243 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
244 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
246 struct async_icount icount;
247 struct usb_serial_port *port; /* loop back to the owner of this object */
251 __u8 ControlRegOffset;
253 /* for processing control URBS in interrupt context */
254 struct urb *control_urb;
255 struct usb_ctrlrequest *dr;
259 spinlock_t pool_lock;
260 struct urb *write_urb_pool[NUM_URBS];
269 * mos7840_set_reg_sync
270 * To set the Control register by calling usb_fill_control_urb function
271 * by passing usb_sndctrlpipe function as parameter.
274 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
277 struct usb_device *dev = port->serial->dev;
279 dbg("mos7840_set_reg_sync offset is %x, value %x", reg, val);
281 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
282 MCS_WR_RTYPE, val, reg, NULL, 0,
287 * mos7840_get_reg_sync
288 * To set the Uart register by calling usb_fill_control_urb function by
289 * passing usb_rcvctrlpipe function as parameter.
292 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
295 struct usb_device *dev = port->serial->dev;
299 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
303 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
304 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
307 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val);
314 * mos7840_set_uart_reg
315 * To set the Uart register by calling usb_fill_control_urb function by
316 * passing usb_sndctrlpipe function as parameter.
319 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
323 struct usb_device *dev = port->serial->dev;
325 /* For the UART control registers, the application number need
327 if (port->serial->num_ports == 4) {
328 val |= (((__u16) port->number -
329 (__u16) (port->serial->minor)) + 1) << 8;
330 dbg("mos7840_set_uart_reg application number is %x", val);
332 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
333 val |= (((__u16) port->number -
334 (__u16) (port->serial->minor)) + 1) << 8;
335 dbg("mos7840_set_uart_reg application number is %x",
339 (((__u16) port->number -
340 (__u16) (port->serial->minor)) + 2) << 8;
341 dbg("mos7840_set_uart_reg application number is %x",
345 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
346 MCS_WR_RTYPE, val, reg, NULL, 0,
352 * mos7840_get_uart_reg
353 * To set the Control register by calling usb_fill_control_urb function
354 * by passing usb_rcvctrlpipe function as parameter.
356 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
359 struct usb_device *dev = port->serial->dev;
364 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
368 /* dbg("application number is %4x",
369 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
370 /* Wval is same as application number */
371 if (port->serial->num_ports == 4) {
373 (((__u16) port->number - (__u16) (port->serial->minor)) +
375 dbg("mos7840_get_uart_reg application number is %x", Wval);
377 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
378 Wval = (((__u16) port->number -
379 (__u16) (port->serial->minor)) + 1) << 8;
380 dbg("mos7840_get_uart_reg application number is %x",
383 Wval = (((__u16) port->number -
384 (__u16) (port->serial->minor)) + 2) << 8;
385 dbg("mos7840_get_uart_reg application number is %x",
389 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
390 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
398 static void mos7840_dump_serial_port(struct moschip_port *mos7840_port)
401 dbg("***************************************");
402 dbg("SpRegOffset is %2x", mos7840_port->SpRegOffset);
403 dbg("ControlRegOffset is %2x", mos7840_port->ControlRegOffset);
404 dbg("DCRRegOffset is %2x", mos7840_port->DcrRegOffset);
405 dbg("***************************************");
409 /************************************************************************/
410 /************************************************************************/
411 /* I N T E R F A C E F U N C T I O N S */
412 /* I N T E R F A C E F U N C T I O N S */
413 /************************************************************************/
414 /************************************************************************/
416 static inline void mos7840_set_port_private(struct usb_serial_port *port,
417 struct moschip_port *data)
419 usb_set_serial_port_data(port, (void *)data);
422 static inline struct moschip_port *mos7840_get_port_private(struct
426 return (struct moschip_port *)usb_get_serial_port_data(port);
429 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
431 struct moschip_port *mos7840_port;
432 struct async_icount *icount;
434 icount = &mos7840_port->icount;
436 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
438 icount = &mos7840_port->icount;
440 /* update input line counters */
441 if (new_msr & MOS_MSR_DELTA_CTS) {
445 if (new_msr & MOS_MSR_DELTA_DSR) {
449 if (new_msr & MOS_MSR_DELTA_CD) {
453 if (new_msr & MOS_MSR_DELTA_RI) {
460 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
462 struct async_icount *icount;
464 dbg("%s - %02x", __func__, new_lsr);
466 if (new_lsr & SERIAL_LSR_BI) {
468 * Parity and Framing errors only count if they
469 * occur exclusive of a break being
472 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
475 /* update input line counters */
476 icount = &port->icount;
477 if (new_lsr & SERIAL_LSR_BI) {
481 if (new_lsr & SERIAL_LSR_OE) {
485 if (new_lsr & SERIAL_LSR_PE) {
489 if (new_lsr & SERIAL_LSR_FE) {
495 /************************************************************************/
496 /************************************************************************/
497 /* U S B C A L L B A C K F U N C T I O N S */
498 /* U S B C A L L B A C K F U N C T I O N S */
499 /************************************************************************/
500 /************************************************************************/
502 static void mos7840_control_callback(struct urb *urb)
505 struct moschip_port *mos7840_port;
508 int status = urb->status;
510 mos7840_port = urb->context;
519 /* this urb is terminated, clean up */
520 dbg("%s - urb shutting down with status: %d", __func__,
524 dbg("%s - nonzero urb status received: %d", __func__,
529 dbg("%s urb buffer size is %d", __func__, urb->actual_length);
530 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__,
531 mos7840_port->MsrLsr, mos7840_port->port_num);
532 data = urb->transfer_buffer;
533 regval = (__u8) data[0];
534 dbg("%s data is %x", __func__, regval);
535 if (mos7840_port->MsrLsr == 0)
536 mos7840_handle_new_msr(mos7840_port, regval);
537 else if (mos7840_port->MsrLsr == 1)
538 mos7840_handle_new_lsr(mos7840_port, regval);
541 spin_lock(&mos7840_port->pool_lock);
542 if (!mos7840_port->zombie)
543 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC);
544 spin_unlock(&mos7840_port->pool_lock);
546 dev_err(&urb->dev->dev,
547 "%s - Error %d submitting interrupt urb\n",
552 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
555 struct usb_device *dev = mcs->port->serial->dev;
556 struct usb_ctrlrequest *dr = mcs->dr;
557 unsigned char *buffer = mcs->ctrl_buf;
560 dr->bRequestType = MCS_RD_RTYPE;
561 dr->bRequest = MCS_RDREQ;
562 dr->wValue = cpu_to_le16(Wval); /* 0 */
563 dr->wIndex = cpu_to_le16(reg);
564 dr->wLength = cpu_to_le16(2);
566 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
567 (unsigned char *)dr, buffer, 2,
568 mos7840_control_callback, mcs);
569 mcs->control_urb->transfer_buffer_length = 2;
570 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
574 /*****************************************************************************
575 * mos7840_interrupt_callback
576 * this is the callback function for when we have received data on the
577 * interrupt endpoint.
578 *****************************************************************************/
580 static void mos7840_interrupt_callback(struct urb *urb)
584 struct moschip_port *mos7840_port;
585 struct usb_serial *serial;
590 __u16 wval, wreg = 0;
591 int status = urb->status;
593 dbg("%s", " : Entering");
602 /* this urb is terminated, clean up */
603 dbg("%s - urb shutting down with status: %d", __func__,
607 dbg("%s - nonzero urb status received: %d", __func__,
612 length = urb->actual_length;
613 data = urb->transfer_buffer;
615 serial = urb->context;
617 /* Moschip get 5 bytes
618 * Byte 1 IIR Port 1 (port.number is 0)
619 * Byte 2 IIR Port 2 (port.number is 1)
620 * Byte 3 IIR Port 3 (port.number is 2)
621 * Byte 4 IIR Port 4 (port.number is 3)
622 * Byte 5 FIFO status for both */
624 if (length && length > 5) {
625 dbg("%s", "Wrong data !!!");
629 sp[0] = (__u8) data[0];
630 sp[1] = (__u8) data[1];
631 sp[2] = (__u8) data[2];
632 sp[3] = (__u8) data[3];
635 for (i = 0; i < serial->num_ports; i++) {
636 mos7840_port = mos7840_get_port_private(serial->port[i]);
638 (((__u16) serial->port[i]->number -
639 (__u16) (serial->minor)) + 1) << 8;
640 if (mos7840_port->open) {
642 dbg("SP%d No Interrupt !!!", i);
644 switch (sp[i] & 0x0f) {
646 dbg("Serial Port %d: Receiver status error or ", i);
647 dbg("address bit detected in 9-bit mode");
648 mos7840_port->MsrLsr = 1;
649 wreg = LINE_STATUS_REGISTER;
652 dbg("Serial Port %d: Modem status change", i);
653 mos7840_port->MsrLsr = 0;
654 wreg = MODEM_STATUS_REGISTER;
657 spin_lock(&mos7840_port->pool_lock);
658 if (!mos7840_port->zombie) {
659 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
661 spin_unlock(&mos7840_port->pool_lock);
664 spin_unlock(&mos7840_port->pool_lock);
669 /* the completion handler for the control urb will resubmit */
672 result = usb_submit_urb(urb, GFP_ATOMIC);
674 dev_err(&urb->dev->dev,
675 "%s - Error %d submitting interrupt urb\n",
680 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
681 const char *function)
684 dbg("%s - port == NULL", function);
688 dbg("%s - port->serial == NULL", function);
695 /* Inline functions to check the sanity of a pointer that is passed to us */
696 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
697 const char *function)
700 dbg("%s - serial == NULL", function);
704 dbg("%s - serial->type == NULL!", function);
711 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
712 const char *function)
714 /* if no port was specified, or it fails a paranoia check */
716 mos7840_port_paranoia_check(port, function) ||
717 mos7840_serial_paranoia_check(port->serial, function)) {
718 /* then say that we don't have a valid usb_serial thing,
719 * which will end up genrating -ENODEV return values */
726 /*****************************************************************************
727 * mos7840_bulk_in_callback
728 * this is the callback function for when we have received data on the
730 *****************************************************************************/
732 static void mos7840_bulk_in_callback(struct urb *urb)
736 struct usb_serial *serial;
737 struct usb_serial_port *port;
738 struct moschip_port *mos7840_port;
739 struct tty_struct *tty;
740 int status = urb->status;
742 mos7840_port = urb->context;
744 dbg("%s", "NULL mos7840_port pointer");
749 dbg("nonzero read bulk status received: %d", status);
750 mos7840_port->read_urb_busy = false;
754 port = (struct usb_serial_port *)mos7840_port->port;
755 if (mos7840_port_paranoia_check(port, __func__)) {
756 dbg("%s", "Port Paranoia failed");
757 mos7840_port->read_urb_busy = false;
761 serial = mos7840_get_usb_serial(port, __func__);
763 dbg("%s", "Bad serial pointer");
764 mos7840_port->read_urb_busy = false;
768 dbg("%s", "Entering... ");
770 data = urb->transfer_buffer;
772 dbg("%s", "Entering ...........");
774 if (urb->actual_length) {
775 tty = tty_port_tty_get(&mos7840_port->port->port);
777 tty_insert_flip_string(tty, data, urb->actual_length);
779 tty_flip_buffer_push(tty);
782 mos7840_port->icount.rx += urb->actual_length;
784 dbg("mos7840_port->icount.rx is %d:",
785 mos7840_port->icount.rx);
788 if (!mos7840_port->read_urb) {
789 dbg("%s", "URB KILLED !!!");
790 mos7840_port->read_urb_busy = false;
795 mos7840_port->read_urb->dev = serial->dev;
797 mos7840_port->read_urb_busy = true;
798 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
801 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval);
802 mos7840_port->read_urb_busy = false;
806 /*****************************************************************************
807 * mos7840_bulk_out_data_callback
808 * this is the callback function for when we have finished sending
809 * serial data on the bulk out endpoint.
810 *****************************************************************************/
812 static void mos7840_bulk_out_data_callback(struct urb *urb)
814 struct moschip_port *mos7840_port;
815 struct tty_struct *tty;
816 int status = urb->status;
819 mos7840_port = urb->context;
820 spin_lock(&mos7840_port->pool_lock);
821 for (i = 0; i < NUM_URBS; i++) {
822 if (urb == mos7840_port->write_urb_pool[i]) {
823 mos7840_port->busy[i] = 0;
827 spin_unlock(&mos7840_port->pool_lock);
830 dbg("nonzero write bulk status received:%d", status);
834 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) {
835 dbg("%s", "Port Paranoia failed");
839 dbg("%s", "Entering .........");
841 tty = tty_port_tty_get(&mos7840_port->port->port);
842 if (tty && mos7840_port->open)
848 /************************************************************************/
849 /* 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 */
850 /************************************************************************/
851 #ifdef MCSSerialProbe
852 static int mos7840_serial_probe(struct usb_serial *serial,
853 const struct usb_device_id *id)
856 /*need to implement the mode_reg reading and updating\
857 structures usb_serial_ device_type\
858 (i.e num_ports, num_bulkin,bulkout etc) */
859 /* Also we can update the changes attach */
864 /*****************************************************************************
866 * this function is called by the tty driver when a port is opened
867 * If successful, we return 0
868 * Otherwise we return a negative error number.
869 *****************************************************************************/
871 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
875 struct usb_serial *serial;
879 struct moschip_port *mos7840_port;
880 struct moschip_port *port0;
882 dbg ("%s enter", __func__);
884 if (mos7840_port_paranoia_check(port, __func__)) {
885 dbg("%s", "Port Paranoia failed");
889 serial = port->serial;
891 if (mos7840_serial_paranoia_check(serial, __func__)) {
892 dbg("%s", "Serial Paranoia failed");
896 mos7840_port = mos7840_get_port_private(port);
897 port0 = mos7840_get_port_private(serial->port[0]);
899 if (mos7840_port == NULL || port0 == NULL)
902 usb_clear_halt(serial->dev, port->write_urb->pipe);
903 usb_clear_halt(serial->dev, port->read_urb->pipe);
906 /* Initialising the write urb pool */
907 for (j = 0; j < NUM_URBS; ++j) {
908 urb = usb_alloc_urb(0, GFP_KERNEL);
909 mos7840_port->write_urb_pool[j] = urb;
912 dev_err(&port->dev, "No more urbs???\n");
916 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
918 if (!urb->transfer_buffer) {
920 mos7840_port->write_urb_pool[j] = NULL;
922 "%s-out of memory for urb buffers.\n",
928 /*****************************************************************************
929 * Initialize MCS7840 -- Write Init values to corresponding Registers
937 * 0x08 : SP1/2 Control Reg
938 *****************************************************************************/
940 /* NEED to check the following Block */
943 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
945 dbg("Reading Spreg failed");
949 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
951 dbg("writing Spreg failed");
956 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
958 dbg("writing Spreg failed");
961 /* End of block to be checked */
964 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
967 dbg("Reading Controlreg failed");
970 Data |= 0x08; /* Driver done bit */
971 Data |= 0x20; /* rx_disable */
972 status = mos7840_set_reg_sync(port,
973 mos7840_port->ControlRegOffset, Data);
975 dbg("writing Controlreg failed");
978 /* do register settings here */
979 /* Set all regs to the device default values. */
980 /***********************************
981 * First Disable all interrupts.
982 ***********************************/
984 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
986 dbg("disabling interrupts failed");
989 /* Set FIFO_CONTROL_REGISTER to the default value */
991 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
993 dbg("Writing FIFO_CONTROL_REGISTER failed");
998 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1000 dbg("Writing FIFO_CONTROL_REGISTER failed");
1005 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1006 mos7840_port->shadowLCR = Data;
1009 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1010 mos7840_port->shadowMCR = Data;
1013 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1014 mos7840_port->shadowLCR = Data;
1016 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1017 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1020 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1023 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1026 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1028 Data = Data & ~SERIAL_LCR_DLAB;
1029 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1030 mos7840_port->shadowLCR = Data;
1032 /* clearing Bulkin and Bulkout Fifo */
1034 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1037 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1039 Data = Data & ~0x0c;
1040 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1041 /* Finally enable all interrupts */
1043 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1045 /* clearing rx_disable */
1047 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1049 Data = Data & ~0x20;
1050 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1055 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1058 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1061 /* Check to see if we've set up our endpoint info yet *
1062 * (can't set it up in mos7840_startup as the structures *
1063 * were not set up at that time.) */
1064 if (port0->open_ports == 1) {
1065 if (serial->port[0]->interrupt_in_buffer == NULL) {
1066 /* set up interrupt urb */
1067 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1069 usb_rcvintpipe(serial->dev,
1070 serial->port[0]->interrupt_in_endpointAddress),
1071 serial->port[0]->interrupt_in_buffer,
1072 serial->port[0]->interrupt_in_urb->
1073 transfer_buffer_length,
1074 mos7840_interrupt_callback,
1076 serial->port[0]->interrupt_in_urb->interval);
1078 /* start interrupt read for mos7840 *
1079 * will continue as long as mos7840 is connected */
1082 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1085 dev_err(&port->dev, "%s - Error %d submitting "
1086 "interrupt urb\n", __func__, response);
1093 /* see if we've set up our endpoint info yet *
1094 * (can't set it up in mos7840_startup as the *
1095 * structures were not set up at that time.) */
1097 dbg("port number is %d", port->number);
1098 dbg("serial number is %d", port->serial->minor);
1099 dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress);
1100 dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress);
1101 dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress);
1102 dbg("port's number in the device is %d", mos7840_port->port_num);
1103 mos7840_port->read_urb = port->read_urb;
1105 /* set up our bulk in urb */
1107 usb_fill_bulk_urb(mos7840_port->read_urb,
1109 usb_rcvbulkpipe(serial->dev,
1110 port->bulk_in_endpointAddress),
1111 port->bulk_in_buffer,
1112 mos7840_port->read_urb->transfer_buffer_length,
1113 mos7840_bulk_in_callback, mos7840_port);
1115 dbg("mos7840_open: bulkin endpoint is %d",
1116 port->bulk_in_endpointAddress);
1117 mos7840_port->read_urb_busy = true;
1118 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1120 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1121 __func__, response);
1122 mos7840_port->read_urb_busy = false;
1125 /* initialize our wait queues */
1126 init_waitqueue_head(&mos7840_port->wait_chase);
1127 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1129 /* initialize our icount structure */
1130 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1132 /* initialize our port settings */
1133 /* Must set to enable ints! */
1134 mos7840_port->shadowMCR = MCR_MASTER_IE;
1135 /* send a open port command */
1136 mos7840_port->open = 1;
1137 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1138 mos7840_port->icount.tx = 0;
1139 mos7840_port->icount.rx = 0;
1141 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p",
1142 serial, mos7840_port, port);
1144 dbg ("%s leave", __func__);
1150 /*****************************************************************************
1151 * mos7840_chars_in_buffer
1152 * this function is called by the tty driver when it wants to know how many
1153 * bytes of data we currently have outstanding in the port (data that has
1154 * been written, but hasn't made it out the port yet)
1155 * If successful, we return the number of bytes left to be written in the
1157 * Otherwise we return zero.
1158 *****************************************************************************/
1160 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1162 struct usb_serial_port *port = tty->driver_data;
1165 unsigned long flags;
1166 struct moschip_port *mos7840_port;
1168 dbg("%s", " mos7840_chars_in_buffer:entering ...........");
1170 if (mos7840_port_paranoia_check(port, __func__)) {
1171 dbg("%s", "Invalid port");
1175 mos7840_port = mos7840_get_port_private(port);
1176 if (mos7840_port == NULL) {
1177 dbg("%s", "mos7840_break:leaving ...........");
1181 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1182 for (i = 0; i < NUM_URBS; ++i)
1183 if (mos7840_port->busy[i])
1184 chars += URB_TRANSFER_BUFFER_SIZE;
1185 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1186 dbg("%s - returns %d", __func__, chars);
1191 /*****************************************************************************
1193 * this function is called by the tty driver when a port is closed
1194 *****************************************************************************/
1196 static void mos7840_close(struct usb_serial_port *port)
1198 struct usb_serial *serial;
1199 struct moschip_port *mos7840_port;
1200 struct moschip_port *port0;
1204 dbg("%s", "mos7840_close:entering...");
1206 if (mos7840_port_paranoia_check(port, __func__)) {
1207 dbg("%s", "Port Paranoia failed");
1211 serial = mos7840_get_usb_serial(port, __func__);
1213 dbg("%s", "Serial Paranoia failed");
1217 mos7840_port = mos7840_get_port_private(port);
1218 port0 = mos7840_get_port_private(serial->port[0]);
1220 if (mos7840_port == NULL || port0 == NULL)
1223 for (j = 0; j < NUM_URBS; ++j)
1224 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1226 /* Freeing Write URBs */
1227 for (j = 0; j < NUM_URBS; ++j) {
1228 if (mos7840_port->write_urb_pool[j]) {
1229 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1230 kfree(mos7840_port->write_urb_pool[j]->
1233 usb_free_urb(mos7840_port->write_urb_pool[j]);
1237 /* While closing port, shutdown all bulk read, write *
1238 * and interrupt read if they exists */
1240 if (mos7840_port->write_urb) {
1241 dbg("%s", "Shutdown bulk write");
1242 usb_kill_urb(mos7840_port->write_urb);
1244 if (mos7840_port->read_urb) {
1245 dbg("%s", "Shutdown bulk read");
1246 usb_kill_urb(mos7840_port->read_urb);
1247 mos7840_port->read_urb_busy = false;
1249 if ((&mos7840_port->control_urb)) {
1250 dbg("%s", "Shutdown control read");
1251 /*/ usb_kill_urb (mos7840_port->control_urb); */
1254 /* if(mos7840_port->ctrl_buf != NULL) */
1255 /* kfree(mos7840_port->ctrl_buf); */
1256 port0->open_ports--;
1257 dbg("mos7840_num_open_ports in close%d:in port%d",
1258 port0->open_ports, port->number);
1259 if (port0->open_ports == 0) {
1260 if (serial->port[0]->interrupt_in_urb) {
1261 dbg("%s", "Shutdown interrupt_in_urb");
1262 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1266 if (mos7840_port->write_urb) {
1267 /* if this urb had a transfer buffer already (old tx) free it */
1268 if (mos7840_port->write_urb->transfer_buffer != NULL)
1269 kfree(mos7840_port->write_urb->transfer_buffer);
1270 usb_free_urb(mos7840_port->write_urb);
1274 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1277 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1279 mos7840_port->open = 0;
1281 dbg("%s", "Leaving ............");
1284 /************************************************************************
1286 * mos7840_block_until_chase_response
1288 * This function will block the close until one of the following:
1289 * 1. Response to our Chase comes from mos7840
1290 * 2. A timeout of 10 seconds without activity has expired
1291 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1293 ************************************************************************/
1295 static void mos7840_block_until_chase_response(struct tty_struct *tty,
1296 struct moschip_port *mos7840_port)
1298 int timeout = 1 * HZ;
1303 count = mos7840_chars_in_buffer(tty);
1305 /* Check for Buffer status */
1309 /* Block the thread for a while */
1310 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1312 /* No activity.. count down section */
1315 dbg("%s - TIMEOUT", __func__);
1318 /* Reset timeout value back to seconds */
1325 /*****************************************************************************
1327 * this function sends a break to the port
1328 *****************************************************************************/
1329 static void mos7840_break(struct tty_struct *tty, int break_state)
1331 struct usb_serial_port *port = tty->driver_data;
1333 struct usb_serial *serial;
1334 struct moschip_port *mos7840_port;
1336 dbg("%s", "Entering ...........");
1337 dbg("mos7840_break: Start");
1339 if (mos7840_port_paranoia_check(port, __func__)) {
1340 dbg("%s", "Port Paranoia failed");
1344 serial = mos7840_get_usb_serial(port, __func__);
1346 dbg("%s", "Serial Paranoia failed");
1350 mos7840_port = mos7840_get_port_private(port);
1352 if (mos7840_port == NULL)
1356 /* flush and block until tx is empty */
1357 mos7840_block_until_chase_response(tty, mos7840_port);
1359 if (break_state == -1)
1360 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1362 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1364 /* FIXME: no locking on shadowLCR anywhere in driver */
1365 mos7840_port->shadowLCR = data;
1366 dbg("mcs7840_break mos7840_port->shadowLCR is %x",
1367 mos7840_port->shadowLCR);
1368 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1369 mos7840_port->shadowLCR);
1374 /*****************************************************************************
1375 * mos7840_write_room
1376 * this function is called by the tty driver when it wants to know how many
1377 * bytes of data we can accept for a specific port.
1378 * If successful, we return the amount of room that we have for this port
1379 * Otherwise we return a negative error number.
1380 *****************************************************************************/
1382 static int mos7840_write_room(struct tty_struct *tty)
1384 struct usb_serial_port *port = tty->driver_data;
1387 unsigned long flags;
1388 struct moschip_port *mos7840_port;
1390 dbg("%s", " mos7840_write_room:entering ...........");
1392 if (mos7840_port_paranoia_check(port, __func__)) {
1393 dbg("%s", "Invalid port");
1394 dbg("%s", " mos7840_write_room:leaving ...........");
1398 mos7840_port = mos7840_get_port_private(port);
1399 if (mos7840_port == NULL) {
1400 dbg("%s", "mos7840_break:leaving ...........");
1404 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1405 for (i = 0; i < NUM_URBS; ++i) {
1406 if (!mos7840_port->busy[i])
1407 room += URB_TRANSFER_BUFFER_SIZE;
1409 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1411 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1412 dbg("%s - returns %d", __func__, room);
1417 /*****************************************************************************
1419 * this function is called by the tty driver when data should be written to
1421 * If successful, we return the number of bytes written, otherwise we
1422 * return a negative error number.
1423 *****************************************************************************/
1425 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1426 const unsigned char *data, int count)
1432 unsigned long flags;
1434 struct moschip_port *mos7840_port;
1435 struct usb_serial *serial;
1438 const unsigned char *current_position = data;
1439 unsigned char *data1;
1440 dbg("%s", "entering ...........");
1441 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1442 mos7840_port->shadowLCR); */
1446 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1447 mos7840_port->shadowLCR = Data;
1448 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data);
1449 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1450 mos7840_port->shadowLCR);
1453 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1454 /* mos7840_port->shadowLCR=Data;//Need to add later */
1456 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1457 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1460 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1462 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1463 dbg("mos7840_write:DLL value is %x", Data);
1466 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1467 dbg("mos7840_write:DLM value is %x", Data);
1469 Data = Data & ~SERIAL_LCR_DLAB;
1470 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1471 mos7840_port->shadowLCR);
1472 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1475 if (mos7840_port_paranoia_check(port, __func__)) {
1476 dbg("%s", "Port Paranoia failed");
1480 serial = port->serial;
1481 if (mos7840_serial_paranoia_check(serial, __func__)) {
1482 dbg("%s", "Serial Paranoia failed");
1486 mos7840_port = mos7840_get_port_private(port);
1487 if (mos7840_port == NULL) {
1488 dbg("%s", "mos7840_port is NULL");
1492 /* try to find a free urb in the list */
1495 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1496 for (i = 0; i < NUM_URBS; ++i) {
1497 if (!mos7840_port->busy[i]) {
1498 mos7840_port->busy[i] = 1;
1499 urb = mos7840_port->write_urb_pool[i];
1504 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1507 dbg("%s - no more free urbs", __func__);
1511 if (urb->transfer_buffer == NULL) {
1512 urb->transfer_buffer =
1513 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1515 if (urb->transfer_buffer == NULL) {
1516 dev_err(&port->dev, "%s no more kernel memory...\n",
1521 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1523 memcpy(urb->transfer_buffer, current_position, transfer_size);
1525 /* fill urb with data and submit */
1526 usb_fill_bulk_urb(urb,
1528 usb_sndbulkpipe(serial->dev,
1529 port->bulk_out_endpointAddress),
1530 urb->transfer_buffer,
1532 mos7840_bulk_out_data_callback, mos7840_port);
1534 data1 = urb->transfer_buffer;
1535 dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress);
1537 /* send it down the pipe */
1538 status = usb_submit_urb(urb, GFP_ATOMIC);
1541 mos7840_port->busy[i] = 0;
1542 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
1543 "with status = %d\n", __func__, status);
1544 bytes_sent = status;
1547 bytes_sent = transfer_size;
1548 mos7840_port->icount.tx += transfer_size;
1550 dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx);
1556 /*****************************************************************************
1558 * this function is called by the tty driver when it wants to stop the data
1559 * being read from the port.
1560 *****************************************************************************/
1562 static void mos7840_throttle(struct tty_struct *tty)
1564 struct usb_serial_port *port = tty->driver_data;
1565 struct moschip_port *mos7840_port;
1568 if (mos7840_port_paranoia_check(port, __func__)) {
1569 dbg("%s", "Invalid port");
1573 dbg("- port %d", port->number);
1575 mos7840_port = mos7840_get_port_private(port);
1577 if (mos7840_port == NULL)
1580 if (!mos7840_port->open) {
1581 dbg("%s", "port not opened");
1585 dbg("%s", "Entering ..........");
1587 /* if we are implementing XON/XOFF, send the stop character */
1589 unsigned char stop_char = STOP_CHAR(tty);
1590 status = mos7840_write(tty, port, &stop_char, 1);
1594 /* if we are implementing RTS/CTS, toggle that line */
1595 if (tty->termios->c_cflag & CRTSCTS) {
1596 mos7840_port->shadowMCR &= ~MCR_RTS;
1597 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1598 mos7840_port->shadowMCR);
1606 /*****************************************************************************
1607 * mos7840_unthrottle
1608 * this function is called by the tty driver when it wants to resume
1609 * the data being read from the port (called after mos7840_throttle is
1611 *****************************************************************************/
1612 static void mos7840_unthrottle(struct tty_struct *tty)
1614 struct usb_serial_port *port = tty->driver_data;
1616 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1618 if (mos7840_port_paranoia_check(port, __func__)) {
1619 dbg("%s", "Invalid port");
1623 if (mos7840_port == NULL)
1626 if (!mos7840_port->open) {
1627 dbg("%s - port not opened", __func__);
1631 dbg("%s", "Entering ..........");
1633 /* if we are implementing XON/XOFF, send the start character */
1635 unsigned char start_char = START_CHAR(tty);
1636 status = mos7840_write(tty, port, &start_char, 1);
1641 /* if we are implementing RTS/CTS, toggle that line */
1642 if (tty->termios->c_cflag & CRTSCTS) {
1643 mos7840_port->shadowMCR |= MCR_RTS;
1644 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1645 mos7840_port->shadowMCR);
1651 static int mos7840_tiocmget(struct tty_struct *tty, struct file *file)
1653 struct usb_serial_port *port = tty->driver_data;
1654 struct moschip_port *mos7840_port;
1655 unsigned int result;
1659 mos7840_port = mos7840_get_port_private(port);
1661 dbg("%s - port %d", __func__, port->number);
1663 if (mos7840_port == NULL)
1666 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1667 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1668 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1669 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1670 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1671 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1672 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1673 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1674 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1676 dbg("%s - 0x%04X", __func__, result);
1681 static int mos7840_tiocmset(struct tty_struct *tty, struct file *file,
1682 unsigned int set, unsigned int clear)
1684 struct usb_serial_port *port = tty->driver_data;
1685 struct moschip_port *mos7840_port;
1689 dbg("%s - port %d", __func__, port->number);
1691 mos7840_port = mos7840_get_port_private(port);
1693 if (mos7840_port == NULL)
1696 /* FIXME: What locks the port registers ? */
1697 mcr = mos7840_port->shadowMCR;
1698 if (clear & TIOCM_RTS)
1700 if (clear & TIOCM_DTR)
1702 if (clear & TIOCM_LOOP)
1703 mcr &= ~MCR_LOOPBACK;
1705 if (set & TIOCM_RTS)
1707 if (set & TIOCM_DTR)
1709 if (set & TIOCM_LOOP)
1710 mcr |= MCR_LOOPBACK;
1712 mos7840_port->shadowMCR = mcr;
1714 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1716 dbg("setting MODEM_CONTROL_REGISTER Failed");
1723 /*****************************************************************************
1724 * mos7840_calc_baud_rate_divisor
1725 * this function calculates the proper baud rate divisor for the specified
1727 *****************************************************************************/
1728 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
1732 dbg("%s - %d", __func__, baudRate);
1734 if (baudRate <= 115200) {
1735 *divisor = 115200 / baudRate;
1738 if ((baudRate > 115200) && (baudRate <= 230400)) {
1739 *divisor = 230400 / baudRate;
1740 *clk_sel_val = 0x10;
1741 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1742 *divisor = 403200 / baudRate;
1743 *clk_sel_val = 0x20;
1744 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1745 *divisor = 460800 / baudRate;
1746 *clk_sel_val = 0x30;
1747 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1748 *divisor = 806400 / baudRate;
1749 *clk_sel_val = 0x40;
1750 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1751 *divisor = 921600 / baudRate;
1752 *clk_sel_val = 0x50;
1753 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1754 *divisor = 1572864 / baudRate;
1755 *clk_sel_val = 0x60;
1756 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1757 *divisor = 3145728 / baudRate;
1758 *clk_sel_val = 0x70;
1764 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1765 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1766 *divisor = mos7840_divisor_table[i].Divisor;
1771 /* After trying for all the standard baud rates *
1772 * Try calculating the divisor for this baud rate */
1774 if (baudrate > 75 && baudrate < 230400) {
1775 /* get the divisor */
1776 custom = (__u16) (230400L / baudrate);
1778 /* Check for round off */
1779 round1 = (__u16) (2304000L / baudrate);
1780 round = (__u16) (round1 - (custom * 10));
1785 dbg(" Baud %d = %d", baudrate, custom);
1789 dbg("%s", " Baud calculation Failed...");
1794 /*****************************************************************************
1795 * mos7840_send_cmd_write_baud_rate
1796 * this function sends the proper command to change the baud rate of the
1798 *****************************************************************************/
1800 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1806 unsigned char number;
1808 struct usb_serial_port *port;
1810 if (mos7840_port == NULL)
1813 port = (struct usb_serial_port *)mos7840_port->port;
1814 if (mos7840_port_paranoia_check(port, __func__)) {
1815 dbg("%s", "Invalid port");
1819 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
1820 dbg("%s", "Invalid Serial");
1824 dbg("%s", "Entering ..........");
1826 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1828 dbg("%s - port = %d, baud = %d", __func__,
1829 mos7840_port->port->number, baudRate);
1830 /* reset clk_uart_sel in spregOffset */
1831 if (baudRate > 115200) {
1832 #ifdef HW_flow_control
1833 /* NOTE: need to see the pther register to modify */
1834 /* setting h/w flow control bit to 1 */
1836 mos7840_port->shadowMCR = Data;
1837 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1840 dbg("Writing spreg failed in set_serial_baud");
1846 #ifdef HW_flow_control
1847 / *setting h/w flow control bit to 0 */
1849 mos7840_port->shadowMCR = Data;
1850 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1853 dbg("Writing spreg failed in set_serial_baud");
1860 if (1) { /* baudRate <= 115200) */
1863 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor,
1865 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1868 dbg("reading spreg failed in set_serial_baud");
1871 Data = (Data & 0x8f) | clk_sel_val;
1872 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1875 dbg("Writing spreg failed in set_serial_baud");
1878 /* Calculate the Divisor */
1881 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1884 /* Enable access to divisor latch */
1885 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1886 mos7840_port->shadowLCR = Data;
1887 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1889 /* Write the divisor */
1890 Data = (unsigned char)(divisor & 0xff);
1891 dbg("set_serial_baud Value to write DLL is %x", Data);
1892 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1894 Data = (unsigned char)((divisor & 0xff00) >> 8);
1895 dbg("set_serial_baud Value to write DLM is %x", Data);
1896 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1898 /* Disable access to divisor latch */
1899 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1900 mos7840_port->shadowLCR = Data;
1901 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1907 /*****************************************************************************
1908 * mos7840_change_port_settings
1909 * This routine is called to set the UART on the device to match
1910 * the specified new settings.
1911 *****************************************************************************/
1913 static void mos7840_change_port_settings(struct tty_struct *tty,
1914 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1924 struct usb_serial_port *port;
1925 struct usb_serial *serial;
1927 if (mos7840_port == NULL)
1930 port = (struct usb_serial_port *)mos7840_port->port;
1932 if (mos7840_port_paranoia_check(port, __func__)) {
1933 dbg("%s", "Invalid port");
1937 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
1938 dbg("%s", "Invalid Serial");
1942 serial = port->serial;
1944 dbg("%s - port %d", __func__, mos7840_port->port->number);
1946 if (!mos7840_port->open) {
1947 dbg("%s - port not opened", __func__);
1951 dbg("%s", "Entering ..........");
1955 lParity = LCR_PAR_NONE;
1957 cflag = tty->termios->c_cflag;
1958 iflag = tty->termios->c_iflag;
1960 /* Change the number of bits */
1961 if (cflag & CSIZE) {
1962 switch (cflag & CSIZE) {
1980 /* Change the Parity bit */
1981 if (cflag & PARENB) {
1982 if (cflag & PARODD) {
1983 lParity = LCR_PAR_ODD;
1984 dbg("%s - parity = odd", __func__);
1986 lParity = LCR_PAR_EVEN;
1987 dbg("%s - parity = even", __func__);
1991 dbg("%s - parity = none", __func__);
1995 lParity = lParity | 0x20;
1997 /* Change the Stop bit */
1998 if (cflag & CSTOPB) {
2000 dbg("%s - stop bits = 2", __func__);
2003 dbg("%s - stop bits = 1", __func__);
2006 /* Update the LCR with the correct value */
2007 mos7840_port->shadowLCR &=
2008 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2009 mos7840_port->shadowLCR |= (lData | lParity | lStop);
2011 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x",
2012 mos7840_port->shadowLCR);
2013 /* Disable Interrupts */
2015 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2018 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2021 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2023 /* Send the updated LCR value to the mos7840 */
2024 Data = mos7840_port->shadowLCR;
2026 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2029 mos7840_port->shadowMCR = Data;
2030 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2032 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2034 /* set up the MCR register and send it to the mos7840 */
2036 mos7840_port->shadowMCR = MCR_MASTER_IE;
2038 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2040 if (cflag & CRTSCTS)
2041 mos7840_port->shadowMCR |= (MCR_XON_ANY);
2043 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
2045 Data = mos7840_port->shadowMCR;
2046 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2048 /* Determine divisor based on baud rate */
2049 baud = tty_get_baud_rate(tty);
2052 /* pick a default, any default... */
2053 dbg("%s", "Picked default baud...");
2057 dbg("%s - baud rate = %d", __func__, baud);
2058 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2060 /* Enable Interrupts */
2062 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2064 if (mos7840_port->read_urb_busy == false) {
2065 mos7840_port->read_urb->dev = serial->dev;
2066 mos7840_port->read_urb_busy = true;
2067 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2069 dbg("usb_submit_urb(read bulk) failed, status = %d",
2071 mos7840_port->read_urb_busy = false;
2074 wake_up(&mos7840_port->delta_msr_wait);
2075 mos7840_port->delta_msr_cond = 1;
2076 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x",
2077 mos7840_port->shadowLCR);
2082 /*****************************************************************************
2083 * mos7840_set_termios
2084 * this function is called by the tty driver when it wants to change
2085 * the termios structure
2086 *****************************************************************************/
2088 static void mos7840_set_termios(struct tty_struct *tty,
2089 struct usb_serial_port *port,
2090 struct ktermios *old_termios)
2094 struct usb_serial *serial;
2095 struct moschip_port *mos7840_port;
2096 dbg("mos7840_set_termios: START");
2097 if (mos7840_port_paranoia_check(port, __func__)) {
2098 dbg("%s", "Invalid port");
2102 serial = port->serial;
2104 if (mos7840_serial_paranoia_check(serial, __func__)) {
2105 dbg("%s", "Invalid Serial");
2109 mos7840_port = mos7840_get_port_private(port);
2111 if (mos7840_port == NULL)
2114 if (!mos7840_port->open) {
2115 dbg("%s - port not opened", __func__);
2119 dbg("%s", "setting termios - ");
2121 cflag = tty->termios->c_cflag;
2123 dbg("%s - clfag %08x iflag %08x", __func__,
2124 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
2125 dbg("%s - old clfag %08x old iflag %08x", __func__,
2126 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2127 dbg("%s - port %d", __func__, port->number);
2129 /* change the port settings to the new ones specified */
2131 mos7840_change_port_settings(tty, mos7840_port, old_termios);
2133 if (!mos7840_port->read_urb) {
2134 dbg("%s", "URB KILLED !!!!!");
2138 if (mos7840_port->read_urb_busy == false) {
2139 mos7840_port->read_urb->dev = serial->dev;
2140 mos7840_port->read_urb_busy = true;
2141 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2143 dbg("usb_submit_urb(read bulk) failed, status = %d",
2145 mos7840_port->read_urb_busy = false;
2151 /*****************************************************************************
2152 * mos7840_get_lsr_info - get line status register info
2154 * Purpose: Let user call ioctl() to get info when the UART physically
2155 * is emptied. On bus types like RS485, the transmitter must
2156 * release the bus after transmitting. This must be done when
2157 * the transmit shift register is empty, not be done when the
2158 * transmit holding register is empty. This functionality
2159 * allows an RS485 driver to be written in user space.
2160 *****************************************************************************/
2162 static int mos7840_get_lsr_info(struct tty_struct *tty,
2163 unsigned int __user *value)
2166 unsigned int result = 0;
2168 count = mos7840_chars_in_buffer(tty);
2170 dbg("%s -- Empty", __func__);
2171 result = TIOCSER_TEMT;
2174 if (copy_to_user(value, &result, sizeof(int)))
2179 /*****************************************************************************
2180 * mos7840_get_serial_info
2181 * function to get information about serial port
2182 *****************************************************************************/
2184 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2185 struct serial_struct __user *retinfo)
2187 struct serial_struct tmp;
2189 if (mos7840_port == NULL)
2195 memset(&tmp, 0, sizeof(tmp));
2197 tmp.type = PORT_16550A;
2198 tmp.line = mos7840_port->port->serial->minor;
2199 tmp.port = mos7840_port->port->number;
2201 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2202 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2203 tmp.baud_base = 9600;
2204 tmp.close_delay = 5 * HZ;
2205 tmp.closing_wait = 30 * HZ;
2207 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2212 /*****************************************************************************
2214 * this function handles any ioctl calls to the driver
2215 *****************************************************************************/
2217 static int mos7840_ioctl(struct tty_struct *tty, struct file *file,
2218 unsigned int cmd, unsigned long arg)
2220 struct usb_serial_port *port = tty->driver_data;
2221 void __user *argp = (void __user *)arg;
2222 struct moschip_port *mos7840_port;
2224 struct async_icount cnow;
2225 struct async_icount cprev;
2226 struct serial_icounter_struct icount;
2228 if (mos7840_port_paranoia_check(port, __func__)) {
2229 dbg("%s", "Invalid port");
2233 mos7840_port = mos7840_get_port_private(port);
2235 if (mos7840_port == NULL)
2238 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
2241 /* return number of bytes available */
2244 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
2245 return mos7840_get_lsr_info(tty, argp);
2249 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
2250 return mos7840_get_serial_info(mos7840_port, argp);
2253 dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
2257 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
2258 cprev = mos7840_port->icount;
2260 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2261 mos7840_port->delta_msr_cond = 0;
2262 wait_event_interruptible(mos7840_port->delta_msr_wait,
2264 delta_msr_cond == 1));
2266 /* see if a signal did it */
2267 if (signal_pending(current))
2268 return -ERESTARTSYS;
2269 cnow = mos7840_port->icount;
2271 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2272 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2273 return -EIO; /* no change => error */
2274 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2275 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2276 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2277 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2286 cnow = mos7840_port->icount;
2289 memset(&icount, 0, sizeof(struct serial_icounter_struct));
2291 icount.cts = cnow.cts;
2292 icount.dsr = cnow.dsr;
2293 icount.rng = cnow.rng;
2294 icount.dcd = cnow.dcd;
2295 icount.rx = cnow.rx;
2296 icount.tx = cnow.tx;
2297 icount.frame = cnow.frame;
2298 icount.overrun = cnow.overrun;
2299 icount.parity = cnow.parity;
2300 icount.brk = cnow.brk;
2301 icount.buf_overrun = cnow.buf_overrun;
2303 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
2304 port->number, icount.rx, icount.tx);
2305 if (copy_to_user(argp, &icount, sizeof(icount)))
2311 return -ENOIOCTLCMD;
2314 static int mos7840_calc_num_ports(struct usb_serial *serial)
2316 int mos7840_num_ports = 0;
2318 dbg("numberofendpoints: cur %d, alt %d",
2319 (int)serial->interface->cur_altsetting->desc.bNumEndpoints,
2320 (int)serial->interface->altsetting->desc.bNumEndpoints);
2321 if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) {
2322 mos7840_num_ports = serial->num_ports = 2;
2323 } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) {
2324 serial->num_bulk_in = 4;
2325 serial->num_bulk_out = 4;
2326 mos7840_num_ports = serial->num_ports = 4;
2328 dbg ("mos7840_num_ports = %d", mos7840_num_ports);
2329 return mos7840_num_ports;
2332 /****************************************************************************
2334 ****************************************************************************/
2336 static int mos7840_startup(struct usb_serial *serial)
2338 struct moschip_port *mos7840_port;
2339 struct usb_device *dev;
2343 dbg("%s", "mos7840_startup :Entering..........");
2346 dbg("%s", "Invalid Handler");
2352 dbg("%s", "Entering...");
2353 dbg ("mos7840_startup: serial = %p", serial);
2355 /* we set up the pointers to the endpoints in the mos7840_open *
2356 * function, as the structures aren't created yet. */
2358 /* set up port private structures */
2359 for (i = 0; i < serial->num_ports; ++i) {
2360 dbg ("mos7840_startup: configuring port %d............", i);
2361 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2362 if (mos7840_port == NULL) {
2363 dev_err(&dev->dev, "%s - Out of memory\n", __func__);
2365 i--; /* don't follow NULL pointer cleaning up */
2369 /* Initialize all port interrupt end point to port 0 int
2370 * endpoint. Our device has only one interrupt end point
2371 * common to all port */
2373 mos7840_port->port = serial->port[i];
2374 mos7840_set_port_private(serial->port[i], mos7840_port);
2375 spin_lock_init(&mos7840_port->pool_lock);
2377 /* minor is not initialised until later by
2378 * usb-serial.c:get_free_serial() and cannot therefore be used
2379 * to index device instances */
2380 mos7840_port->port_num = i + 1;
2381 dbg ("serial->port[i]->number = %d", serial->port[i]->number);
2382 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor);
2383 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num);
2384 dbg ("serial->minor = %d", serial->minor);
2386 if (mos7840_port->port_num == 1) {
2387 mos7840_port->SpRegOffset = 0x0;
2388 mos7840_port->ControlRegOffset = 0x1;
2389 mos7840_port->DcrRegOffset = 0x4;
2390 } else if ((mos7840_port->port_num == 2)
2391 && (serial->num_ports == 4)) {
2392 mos7840_port->SpRegOffset = 0x8;
2393 mos7840_port->ControlRegOffset = 0x9;
2394 mos7840_port->DcrRegOffset = 0x16;
2395 } else if ((mos7840_port->port_num == 2)
2396 && (serial->num_ports == 2)) {
2397 mos7840_port->SpRegOffset = 0xa;
2398 mos7840_port->ControlRegOffset = 0xb;
2399 mos7840_port->DcrRegOffset = 0x19;
2400 } else if ((mos7840_port->port_num == 3)
2401 && (serial->num_ports == 4)) {
2402 mos7840_port->SpRegOffset = 0xa;
2403 mos7840_port->ControlRegOffset = 0xb;
2404 mos7840_port->DcrRegOffset = 0x19;
2405 } else if ((mos7840_port->port_num == 4)
2406 && (serial->num_ports == 4)) {
2407 mos7840_port->SpRegOffset = 0xc;
2408 mos7840_port->ControlRegOffset = 0xd;
2409 mos7840_port->DcrRegOffset = 0x1c;
2411 mos7840_dump_serial_port(mos7840_port);
2412 mos7840_set_port_private(serial->port[i], mos7840_port);
2414 /* enable rx_disable bit in control register */
2415 status = mos7840_get_reg_sync(serial->port[i],
2416 mos7840_port->ControlRegOffset, &Data);
2418 dbg("Reading ControlReg failed status-0x%x", status);
2421 dbg("ControlReg Reading success val is %x, status%d",
2423 Data |= 0x08; /* setting driver done bit */
2424 Data |= 0x04; /* sp1_bit to have cts change reflect in
2427 /* Data |= 0x20; //rx_disable bit */
2428 status = mos7840_set_reg_sync(serial->port[i],
2429 mos7840_port->ControlRegOffset, Data);
2431 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status);
2434 dbg("ControlReg Writing success(rx_disable) status%d",
2437 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2440 status = mos7840_set_reg_sync(serial->port[i],
2441 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2443 dbg("Writing DCR0 failed status-0x%x", status);
2446 dbg("DCR0 Writing success status%d", status);
2449 status = mos7840_set_reg_sync(serial->port[i],
2450 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2452 dbg("Writing DCR1 failed status-0x%x", status);
2455 dbg("DCR1 Writing success status%d", status);
2458 status = mos7840_set_reg_sync(serial->port[i],
2459 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2461 dbg("Writing DCR2 failed status-0x%x", status);
2464 dbg("DCR2 Writing success status%d", status);
2466 /* write values in clkstart0x0 and clkmulti 0x20 */
2468 status = mos7840_set_reg_sync(serial->port[i],
2469 CLK_START_VALUE_REGISTER, Data);
2471 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status);
2474 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status);
2477 status = mos7840_set_reg_sync(serial->port[i],
2478 CLK_MULTI_REGISTER, Data);
2480 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x",
2484 dbg("CLK_MULTI_REGISTER Writing success status%d",
2487 /* write value 0x0 to scratchpad register */
2489 status = mos7840_set_uart_reg(serial->port[i],
2490 SCRATCH_PAD_REGISTER, Data);
2492 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x",
2496 dbg("SCRATCH_PAD_REGISTER Writing success status%d",
2499 /* Zero Length flag register */
2500 if ((mos7840_port->port_num != 1)
2501 && (serial->num_ports == 2)) {
2504 status = mos7840_set_reg_sync(serial->port[i],
2506 ((__u16)mos7840_port->port_num)), Data);
2507 dbg("ZLIP offset %x",
2509 ((__u16) mos7840_port->port_num)));
2511 dbg("Writing ZLP_REG%d failed status-0x%x",
2515 dbg("ZLP_REG%d Writing success status%d",
2519 status = mos7840_set_reg_sync(serial->port[i],
2521 ((__u16)mos7840_port->port_num) - 0x1), Data);
2522 dbg("ZLIP offset %x",
2524 ((__u16) mos7840_port->port_num) - 0x1));
2526 dbg("Writing ZLP_REG%d failed status-0x%x",
2530 dbg("ZLP_REG%d Writing success status%d",
2534 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2535 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2536 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2538 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2539 !mos7840_port->dr) {
2544 dbg ("mos7840_startup: all ports configured...........");
2546 /* Zero Length flag enable */
2548 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2550 dbg("Writing ZLP_REG5 failed status-0x%x", status);
2553 dbg("ZLP_REG5 Writing success status%d", status);
2555 /* setting configuration feature to one */
2556 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2557 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
2560 for (/* nothing */; i >= 0; i--) {
2561 mos7840_port = mos7840_get_port_private(serial->port[i]);
2563 kfree(mos7840_port->dr);
2564 kfree(mos7840_port->ctrl_buf);
2565 usb_free_urb(mos7840_port->control_urb);
2566 kfree(mos7840_port);
2567 serial->port[i] = NULL;
2572 /****************************************************************************
2573 * mos7840_disconnect
2574 * This function is called whenever the device is removed from the usb bus.
2575 ****************************************************************************/
2577 static void mos7840_disconnect(struct usb_serial *serial)
2580 unsigned long flags;
2581 struct moschip_port *mos7840_port;
2582 dbg("%s", " disconnect :entering..........");
2585 dbg("%s", "Invalid Handler");
2589 /* check for the ports to be closed,close the ports and disconnect */
2591 /* free private structure allocated for serial port *
2592 * stop reads and writes on all ports */
2594 for (i = 0; i < serial->num_ports; ++i) {
2595 mos7840_port = mos7840_get_port_private(serial->port[i]);
2596 dbg ("mos7840_port %d = %p", i, mos7840_port);
2598 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
2599 mos7840_port->zombie = 1;
2600 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
2601 usb_kill_urb(mos7840_port->control_urb);
2605 dbg("%s", "Thank u :: ");
2609 /****************************************************************************
2611 * This function is called when the usb_serial structure is freed.
2612 ****************************************************************************/
2614 static void mos7840_release(struct usb_serial *serial)
2617 struct moschip_port *mos7840_port;
2618 dbg("%s", " release :entering..........");
2621 dbg("%s", "Invalid Handler");
2625 /* check for the ports to be closed,close the ports and disconnect */
2627 /* free private structure allocated for serial port *
2628 * stop reads and writes on all ports */
2630 for (i = 0; i < serial->num_ports; ++i) {
2631 mos7840_port = mos7840_get_port_private(serial->port[i]);
2632 dbg("mos7840_port %d = %p", i, mos7840_port);
2634 kfree(mos7840_port->ctrl_buf);
2635 kfree(mos7840_port->dr);
2636 kfree(mos7840_port);
2640 dbg("%s", "Thank u :: ");
2644 static struct usb_driver io_driver = {
2646 .probe = usb_serial_probe,
2647 .disconnect = usb_serial_disconnect,
2648 .id_table = moschip_id_table_combined,
2652 static struct usb_serial_driver moschip7840_4port_device = {
2654 .owner = THIS_MODULE,
2657 .description = DRIVER_DESC,
2658 .usb_driver = &io_driver,
2659 .id_table = moschip_port_id_table,
2661 .open = mos7840_open,
2662 .close = mos7840_close,
2663 .write = mos7840_write,
2664 .write_room = mos7840_write_room,
2665 .chars_in_buffer = mos7840_chars_in_buffer,
2666 .throttle = mos7840_throttle,
2667 .unthrottle = mos7840_unthrottle,
2668 .calc_num_ports = mos7840_calc_num_ports,
2669 #ifdef MCSSerialProbe
2670 .probe = mos7840_serial_probe,
2672 .ioctl = mos7840_ioctl,
2673 .set_termios = mos7840_set_termios,
2674 .break_ctl = mos7840_break,
2675 .tiocmget = mos7840_tiocmget,
2676 .tiocmset = mos7840_tiocmset,
2677 .attach = mos7840_startup,
2678 .disconnect = mos7840_disconnect,
2679 .release = mos7840_release,
2680 .read_bulk_callback = mos7840_bulk_in_callback,
2681 .read_int_callback = mos7840_interrupt_callback,
2684 /****************************************************************************
2686 * This is called by the module subsystem, or on startup to initialize us
2687 ****************************************************************************/
2688 static int __init moschip7840_init(void)
2692 dbg("%s", " mos7840_init :entering..........");
2694 /* Register with the usb serial */
2695 retval = usb_serial_register(&moschip7840_4port_device);
2698 goto failed_port_device_register;
2700 dbg("%s", "Entering...");
2701 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
2704 /* Register with the usb */
2705 retval = usb_register(&io_driver);
2707 dbg("%s", "Leaving...");
2710 usb_serial_deregister(&moschip7840_4port_device);
2711 failed_port_device_register:
2715 /****************************************************************************
2717 * Called when the driver is about to be unloaded.
2718 ****************************************************************************/
2719 static void __exit moschip7840_exit(void)
2722 dbg("%s", " mos7840_exit :entering..........");
2724 usb_deregister(&io_driver);
2726 usb_serial_deregister(&moschip7840_4port_device);
2728 dbg("%s", "Entering...");
2731 module_init(moschip7840_init);
2732 module_exit(moschip7840_exit);
2734 /* Module information */
2735 MODULE_DESCRIPTION(DRIVER_DESC);
2736 MODULE_LICENSE("GPL");
2738 module_param(debug, bool, S_IRUGO | S_IWUSR);
2739 MODULE_PARM_DESC(debug, "Debug enabled or not");