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))
177 #define GPIO_REGISTER ((__u16)(0x07))
179 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
182 * URB POOL related defines
184 #define NUM_URBS 16 /* URB Count */
185 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
189 MOS7840_FLAG_CTRL_BUSY,
192 static const struct usb_device_id moschip_port_id_table[] = {
193 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
194 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
205 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
206 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
207 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
208 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
209 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
210 {} /* terminating entry */
213 static const struct usb_device_id moschip_id_table_combined[] __devinitconst = {
214 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
215 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
216 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
217 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
218 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
219 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
220 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
221 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
222 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
223 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
224 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
225 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
226 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
227 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
228 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
229 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
230 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
231 {} /* terminating entry */
234 MODULE_DEVICE_TABLE(usb, moschip_id_table_combined);
236 /* This structure holds all of the local port information */
238 struct moschip_port {
239 int port_num; /*Actual port number in the device(1,2,etc) */
240 struct urb *write_urb; /* write URB for this port */
241 struct urb *read_urb; /* read URB for this port */
242 __u8 shadowLCR; /* last LCR value received */
243 __u8 shadowMCR; /* last MCR value received */
246 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
248 struct async_icount icount;
249 struct usb_serial_port *port; /* loop back to the owner of this object */
253 __u8 ControlRegOffset;
255 /* for processing control URBS in interrupt context */
256 struct urb *control_urb;
257 struct usb_ctrlrequest *dr;
261 spinlock_t pool_lock;
262 struct urb *write_urb_pool[NUM_URBS];
273 * mos7840_set_reg_sync
274 * To set the Control register by calling usb_fill_control_urb function
275 * by passing usb_sndctrlpipe function as parameter.
278 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
281 struct usb_device *dev = port->serial->dev;
283 dbg("mos7840_set_reg_sync offset is %x, value %x", reg, val);
285 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
286 MCS_WR_RTYPE, val, reg, NULL, 0,
291 * mos7840_get_reg_sync
292 * To set the Uart register by calling usb_fill_control_urb function by
293 * passing usb_rcvctrlpipe function as parameter.
296 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
299 struct usb_device *dev = port->serial->dev;
303 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
307 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
308 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
311 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val);
318 * mos7840_set_uart_reg
319 * To set the Uart register by calling usb_fill_control_urb function by
320 * passing usb_sndctrlpipe function as parameter.
323 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
327 struct usb_device *dev = port->serial->dev;
329 /* For the UART control registers, the application number need
331 if (port->serial->num_ports == 4) {
332 val |= (((__u16) port->number -
333 (__u16) (port->serial->minor)) + 1) << 8;
334 dbg("mos7840_set_uart_reg application number is %x", val);
336 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
337 val |= (((__u16) port->number -
338 (__u16) (port->serial->minor)) + 1) << 8;
339 dbg("mos7840_set_uart_reg application number is %x",
343 (((__u16) port->number -
344 (__u16) (port->serial->minor)) + 2) << 8;
345 dbg("mos7840_set_uart_reg application number is %x",
349 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
350 MCS_WR_RTYPE, val, reg, NULL, 0,
356 * mos7840_get_uart_reg
357 * To set the Control register by calling usb_fill_control_urb function
358 * by passing usb_rcvctrlpipe function as parameter.
360 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
363 struct usb_device *dev = port->serial->dev;
368 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
372 /* dbg("application number is %4x",
373 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
374 /* Wval is same as application number */
375 if (port->serial->num_ports == 4) {
377 (((__u16) port->number - (__u16) (port->serial->minor)) +
379 dbg("mos7840_get_uart_reg application number is %x", Wval);
381 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
382 Wval = (((__u16) port->number -
383 (__u16) (port->serial->minor)) + 1) << 8;
384 dbg("mos7840_get_uart_reg application number is %x",
387 Wval = (((__u16) port->number -
388 (__u16) (port->serial->minor)) + 2) << 8;
389 dbg("mos7840_get_uart_reg application number is %x",
393 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
394 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
402 static void mos7840_dump_serial_port(struct moschip_port *mos7840_port)
405 dbg("***************************************");
406 dbg("SpRegOffset is %2x", mos7840_port->SpRegOffset);
407 dbg("ControlRegOffset is %2x", mos7840_port->ControlRegOffset);
408 dbg("DCRRegOffset is %2x", mos7840_port->DcrRegOffset);
409 dbg("***************************************");
413 /************************************************************************/
414 /************************************************************************/
415 /* I N T E R F A C E F U N C T I O N S */
416 /* I N T E R F A C E F U N C T I O N S */
417 /************************************************************************/
418 /************************************************************************/
420 static inline void mos7840_set_port_private(struct usb_serial_port *port,
421 struct moschip_port *data)
423 usb_set_serial_port_data(port, (void *)data);
426 static inline struct moschip_port *mos7840_get_port_private(struct
430 return (struct moschip_port *)usb_get_serial_port_data(port);
433 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
435 struct moschip_port *mos7840_port;
436 struct async_icount *icount;
438 icount = &mos7840_port->icount;
440 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
442 icount = &mos7840_port->icount;
444 /* update input line counters */
445 if (new_msr & MOS_MSR_DELTA_CTS) {
449 if (new_msr & MOS_MSR_DELTA_DSR) {
453 if (new_msr & MOS_MSR_DELTA_CD) {
457 if (new_msr & MOS_MSR_DELTA_RI) {
462 mos7840_port->delta_msr_cond = 1;
463 wake_up_interruptible(&port->port->delta_msr_wait);
467 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
469 struct async_icount *icount;
471 dbg("%s - %02x", __func__, new_lsr);
473 if (new_lsr & SERIAL_LSR_BI) {
475 * Parity and Framing errors only count if they
476 * occur exclusive of a break being
479 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
482 /* update input line counters */
483 icount = &port->icount;
484 if (new_lsr & SERIAL_LSR_BI) {
488 if (new_lsr & SERIAL_LSR_OE) {
492 if (new_lsr & SERIAL_LSR_PE) {
496 if (new_lsr & SERIAL_LSR_FE) {
502 /************************************************************************/
503 /************************************************************************/
504 /* U S B C A L L B A C K F U N C T I O N S */
505 /* U S B C A L L B A C K F U N C T I O N S */
506 /************************************************************************/
507 /************************************************************************/
509 static void mos7840_control_callback(struct urb *urb)
512 struct moschip_port *mos7840_port;
514 int status = urb->status;
516 mos7840_port = urb->context;
525 /* this urb is terminated, clean up */
526 dbg("%s - urb shutting down with status: %d", __func__,
530 dbg("%s - nonzero urb status received: %d", __func__,
535 dbg("%s urb buffer size is %d", __func__, urb->actual_length);
536 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__,
537 mos7840_port->MsrLsr, mos7840_port->port_num);
538 data = urb->transfer_buffer;
539 regval = (__u8) data[0];
540 dbg("%s data is %x", __func__, regval);
541 if (mos7840_port->MsrLsr == 0)
542 mos7840_handle_new_msr(mos7840_port, regval);
543 else if (mos7840_port->MsrLsr == 1)
544 mos7840_handle_new_lsr(mos7840_port, regval);
546 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mos7840_port->flags);
549 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
552 struct usb_device *dev = mcs->port->serial->dev;
553 struct usb_ctrlrequest *dr = mcs->dr;
554 unsigned char *buffer = mcs->ctrl_buf;
557 if (test_and_set_bit_lock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags))
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);
572 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags);
577 /*****************************************************************************
578 * mos7840_interrupt_callback
579 * this is the callback function for when we have received data on the
580 * interrupt endpoint.
581 *****************************************************************************/
583 static void mos7840_interrupt_callback(struct urb *urb)
587 struct moschip_port *mos7840_port;
588 struct usb_serial *serial;
593 __u16 wval, wreg = 0;
594 int status = urb->status;
596 dbg("%s", " : Entering");
605 /* this urb is terminated, clean up */
606 dbg("%s - urb shutting down with status: %d", __func__,
610 dbg("%s - nonzero urb status received: %d", __func__,
615 length = urb->actual_length;
616 data = urb->transfer_buffer;
618 serial = urb->context;
620 /* Moschip get 5 bytes
621 * Byte 1 IIR Port 1 (port.number is 0)
622 * Byte 2 IIR Port 2 (port.number is 1)
623 * Byte 3 IIR Port 3 (port.number is 2)
624 * Byte 4 IIR Port 4 (port.number is 3)
625 * Byte 5 FIFO status for both */
627 if (length && length > 5) {
628 dbg("%s", "Wrong data !!!");
632 sp[0] = (__u8) data[0];
633 sp[1] = (__u8) data[1];
634 sp[2] = (__u8) data[2];
635 sp[3] = (__u8) data[3];
638 for (i = 0; i < serial->num_ports; i++) {
639 mos7840_port = mos7840_get_port_private(serial->port[i]);
641 (((__u16) serial->port[i]->number -
642 (__u16) (serial->minor)) + 1) << 8;
643 if (mos7840_port->open) {
645 dbg("SP%d No Interrupt !!!", i);
647 switch (sp[i] & 0x0f) {
649 dbg("Serial Port %d: Receiver status error or ", i);
650 dbg("address bit detected in 9-bit mode");
651 mos7840_port->MsrLsr = 1;
652 wreg = LINE_STATUS_REGISTER;
655 dbg("Serial Port %d: Modem status change", i);
656 mos7840_port->MsrLsr = 0;
657 wreg = MODEM_STATUS_REGISTER;
660 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
665 /* the completion handler for the control urb will resubmit */
668 result = usb_submit_urb(urb, GFP_ATOMIC);
670 dev_err(&urb->dev->dev,
671 "%s - Error %d submitting interrupt urb\n",
676 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
677 const char *function)
680 dbg("%s - port == NULL", function);
684 dbg("%s - port->serial == NULL", function);
691 /* Inline functions to check the sanity of a pointer that is passed to us */
692 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
693 const char *function)
696 dbg("%s - serial == NULL", function);
700 dbg("%s - serial->type == NULL!", function);
707 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
708 const char *function)
710 /* if no port was specified, or it fails a paranoia check */
712 mos7840_port_paranoia_check(port, function) ||
713 mos7840_serial_paranoia_check(port->serial, function)) {
714 /* then say that we don't have a valid usb_serial thing,
715 * which will end up genrating -ENODEV return values */
722 /*****************************************************************************
723 * mos7840_bulk_in_callback
724 * this is the callback function for when we have received data on the
726 *****************************************************************************/
728 static void mos7840_bulk_in_callback(struct urb *urb)
732 struct usb_serial *serial;
733 struct usb_serial_port *port;
734 struct moschip_port *mos7840_port;
735 struct tty_struct *tty;
736 int status = urb->status;
738 mos7840_port = urb->context;
740 dbg("%s", "NULL mos7840_port pointer");
745 dbg("nonzero read bulk status received: %d", status);
746 mos7840_port->read_urb_busy = false;
750 port = (struct usb_serial_port *)mos7840_port->port;
751 if (mos7840_port_paranoia_check(port, __func__)) {
752 dbg("%s", "Port Paranoia failed");
753 mos7840_port->read_urb_busy = false;
757 serial = mos7840_get_usb_serial(port, __func__);
759 dbg("%s", "Bad serial pointer");
760 mos7840_port->read_urb_busy = false;
764 dbg("%s", "Entering... ");
766 data = urb->transfer_buffer;
768 dbg("%s", "Entering ...........");
770 if (urb->actual_length) {
771 tty = tty_port_tty_get(&mos7840_port->port->port);
773 tty_insert_flip_string(tty, data, urb->actual_length);
775 tty_flip_buffer_push(tty);
778 mos7840_port->icount.rx += urb->actual_length;
780 dbg("mos7840_port->icount.rx is %d:",
781 mos7840_port->icount.rx);
784 if (!mos7840_port->read_urb) {
785 dbg("%s", "URB KILLED !!!");
786 mos7840_port->read_urb_busy = false;
791 mos7840_port->read_urb->dev = serial->dev;
793 mos7840_port->read_urb_busy = true;
794 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
797 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval);
798 mos7840_port->read_urb_busy = false;
802 /*****************************************************************************
803 * mos7840_bulk_out_data_callback
804 * this is the callback function for when we have finished sending
805 * serial data on the bulk out endpoint.
806 *****************************************************************************/
808 static void mos7840_bulk_out_data_callback(struct urb *urb)
810 struct moschip_port *mos7840_port;
811 struct tty_struct *tty;
812 int status = urb->status;
815 mos7840_port = urb->context;
816 spin_lock(&mos7840_port->pool_lock);
817 for (i = 0; i < NUM_URBS; i++) {
818 if (urb == mos7840_port->write_urb_pool[i]) {
819 mos7840_port->busy[i] = 0;
823 spin_unlock(&mos7840_port->pool_lock);
826 dbg("nonzero write bulk status received:%d", status);
830 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) {
831 dbg("%s", "Port Paranoia failed");
835 dbg("%s", "Entering .........");
837 tty = tty_port_tty_get(&mos7840_port->port->port);
838 if (tty && mos7840_port->open)
844 /************************************************************************/
845 /* 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 */
846 /************************************************************************/
847 #ifdef MCSSerialProbe
848 static int mos7840_serial_probe(struct usb_serial *serial,
849 const struct usb_device_id *id)
852 /*need to implement the mode_reg reading and updating\
853 structures usb_serial_ device_type\
854 (i.e num_ports, num_bulkin,bulkout etc) */
855 /* Also we can update the changes attach */
860 /*****************************************************************************
862 * this function is called by the tty driver when a port is opened
863 * If successful, we return 0
864 * Otherwise we return a negative error number.
865 *****************************************************************************/
867 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
871 struct usb_serial *serial;
875 struct moschip_port *mos7840_port;
876 struct moschip_port *port0;
878 dbg ("%s enter", __func__);
880 if (mos7840_port_paranoia_check(port, __func__)) {
881 dbg("%s", "Port Paranoia failed");
885 serial = port->serial;
887 if (mos7840_serial_paranoia_check(serial, __func__)) {
888 dbg("%s", "Serial Paranoia failed");
892 mos7840_port = mos7840_get_port_private(port);
893 port0 = mos7840_get_port_private(serial->port[0]);
895 if (mos7840_port == NULL || port0 == NULL)
898 usb_clear_halt(serial->dev, port->write_urb->pipe);
899 usb_clear_halt(serial->dev, port->read_urb->pipe);
902 /* Initialising the write urb pool */
903 for (j = 0; j < NUM_URBS; ++j) {
904 urb = usb_alloc_urb(0, GFP_KERNEL);
905 mos7840_port->write_urb_pool[j] = urb;
908 dev_err(&port->dev, "No more urbs???\n");
912 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
914 if (!urb->transfer_buffer) {
916 mos7840_port->write_urb_pool[j] = NULL;
918 "%s-out of memory for urb buffers.\n",
924 /*****************************************************************************
925 * Initialize MCS7840 -- Write Init values to corresponding Registers
933 * 0x08 : SP1/2 Control Reg
934 *****************************************************************************/
936 /* NEED to check the following Block */
939 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
941 dbg("Reading Spreg failed");
945 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
947 dbg("writing Spreg failed");
952 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
954 dbg("writing Spreg failed");
957 /* End of block to be checked */
960 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
963 dbg("Reading Controlreg failed");
966 Data |= 0x08; /* Driver done bit */
967 Data |= 0x20; /* rx_disable */
968 status = mos7840_set_reg_sync(port,
969 mos7840_port->ControlRegOffset, Data);
971 dbg("writing Controlreg failed");
974 /* do register settings here */
975 /* Set all regs to the device default values. */
976 /***********************************
977 * First Disable all interrupts.
978 ***********************************/
980 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
982 dbg("disabling interrupts failed");
985 /* Set FIFO_CONTROL_REGISTER to the default value */
987 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
989 dbg("Writing FIFO_CONTROL_REGISTER failed");
994 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
996 dbg("Writing FIFO_CONTROL_REGISTER failed");
1001 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1002 mos7840_port->shadowLCR = Data;
1005 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1006 mos7840_port->shadowMCR = Data;
1009 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1010 mos7840_port->shadowLCR = Data;
1012 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1013 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1016 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1019 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1022 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1024 Data = Data & ~SERIAL_LCR_DLAB;
1025 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1026 mos7840_port->shadowLCR = Data;
1028 /* clearing Bulkin and Bulkout Fifo */
1030 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1033 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1035 Data = Data & ~0x0c;
1036 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1037 /* Finally enable all interrupts */
1039 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1041 /* clearing rx_disable */
1043 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1045 Data = Data & ~0x20;
1046 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1051 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1054 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1057 /* Check to see if we've set up our endpoint info yet *
1058 * (can't set it up in mos7840_startup as the structures *
1059 * were not set up at that time.) */
1060 if (port0->open_ports == 1) {
1061 if (serial->port[0]->interrupt_in_buffer == NULL) {
1062 /* set up interrupt urb */
1063 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1065 usb_rcvintpipe(serial->dev,
1066 serial->port[0]->interrupt_in_endpointAddress),
1067 serial->port[0]->interrupt_in_buffer,
1068 serial->port[0]->interrupt_in_urb->
1069 transfer_buffer_length,
1070 mos7840_interrupt_callback,
1072 serial->port[0]->interrupt_in_urb->interval);
1074 /* start interrupt read for mos7840 */
1076 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1079 dev_err(&port->dev, "%s - Error %d submitting "
1080 "interrupt urb\n", __func__, response);
1087 /* see if we've set up our endpoint info yet *
1088 * (can't set it up in mos7840_startup as the *
1089 * structures were not set up at that time.) */
1091 dbg("port number is %d", port->number);
1092 dbg("serial number is %d", port->serial->minor);
1093 dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress);
1094 dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress);
1095 dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress);
1096 dbg("port's number in the device is %d", mos7840_port->port_num);
1097 mos7840_port->read_urb = port->read_urb;
1099 /* set up our bulk in urb */
1100 if ((serial->num_ports == 2)
1101 && ((((__u16)port->number -
1102 (__u16)(port->serial->minor)) % 2) != 0)) {
1103 usb_fill_bulk_urb(mos7840_port->read_urb,
1105 usb_rcvbulkpipe(serial->dev,
1106 (port->bulk_in_endpointAddress) + 2),
1107 port->bulk_in_buffer,
1108 mos7840_port->read_urb->transfer_buffer_length,
1109 mos7840_bulk_in_callback, mos7840_port);
1111 usb_fill_bulk_urb(mos7840_port->read_urb,
1113 usb_rcvbulkpipe(serial->dev,
1114 port->bulk_in_endpointAddress),
1115 port->bulk_in_buffer,
1116 mos7840_port->read_urb->transfer_buffer_length,
1117 mos7840_bulk_in_callback, mos7840_port);
1120 dbg("mos7840_open: bulkin endpoint is %d",
1121 port->bulk_in_endpointAddress);
1122 mos7840_port->read_urb_busy = true;
1123 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1125 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1126 __func__, response);
1127 mos7840_port->read_urb_busy = false;
1130 /* initialize our wait queues */
1131 init_waitqueue_head(&mos7840_port->wait_chase);
1133 /* initialize our icount structure */
1134 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1136 /* initialize our port settings */
1137 /* Must set to enable ints! */
1138 mos7840_port->shadowMCR = MCR_MASTER_IE;
1139 /* send a open port command */
1140 mos7840_port->open = 1;
1141 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1142 mos7840_port->icount.tx = 0;
1143 mos7840_port->icount.rx = 0;
1145 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p",
1146 serial, mos7840_port, port);
1148 dbg ("%s leave", __func__);
1152 for (j = 0; j < NUM_URBS; ++j) {
1153 urb = mos7840_port->write_urb_pool[j];
1156 kfree(urb->transfer_buffer);
1162 /*****************************************************************************
1163 * mos7840_chars_in_buffer
1164 * this function is called by the tty driver when it wants to know how many
1165 * bytes of data we currently have outstanding in the port (data that has
1166 * been written, but hasn't made it out the port yet)
1167 * If successful, we return the number of bytes left to be written in the
1169 * Otherwise we return zero.
1170 *****************************************************************************/
1172 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1174 struct usb_serial_port *port = tty->driver_data;
1177 unsigned long flags;
1178 struct moschip_port *mos7840_port;
1180 dbg("%s", " mos7840_chars_in_buffer:entering ...........");
1182 if (mos7840_port_paranoia_check(port, __func__)) {
1183 dbg("%s", "Invalid port");
1187 mos7840_port = mos7840_get_port_private(port);
1188 if (mos7840_port == NULL) {
1189 dbg("%s", "mos7840_break:leaving ...........");
1193 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1194 for (i = 0; i < NUM_URBS; ++i) {
1195 if (mos7840_port->busy[i]) {
1196 struct urb *urb = mos7840_port->write_urb_pool[i];
1197 chars += urb->transfer_buffer_length;
1200 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1201 dbg("%s - returns %d", __func__, chars);
1206 /*****************************************************************************
1208 * this function is called by the tty driver when a port is closed
1209 *****************************************************************************/
1211 static void mos7840_close(struct usb_serial_port *port)
1213 struct usb_serial *serial;
1214 struct moschip_port *mos7840_port;
1215 struct moschip_port *port0;
1219 dbg("%s", "mos7840_close:entering...");
1221 if (mos7840_port_paranoia_check(port, __func__)) {
1222 dbg("%s", "Port Paranoia failed");
1226 serial = mos7840_get_usb_serial(port, __func__);
1228 dbg("%s", "Serial Paranoia failed");
1232 mos7840_port = mos7840_get_port_private(port);
1233 port0 = mos7840_get_port_private(serial->port[0]);
1235 if (mos7840_port == NULL || port0 == NULL)
1238 for (j = 0; j < NUM_URBS; ++j)
1239 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1241 /* Freeing Write URBs */
1242 for (j = 0; j < NUM_URBS; ++j) {
1243 if (mos7840_port->write_urb_pool[j]) {
1244 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1245 kfree(mos7840_port->write_urb_pool[j]->
1248 usb_free_urb(mos7840_port->write_urb_pool[j]);
1252 /* While closing port, shutdown all bulk read, write *
1253 * and interrupt read if they exists */
1255 if (mos7840_port->write_urb) {
1256 dbg("%s", "Shutdown bulk write");
1257 usb_kill_urb(mos7840_port->write_urb);
1259 if (mos7840_port->read_urb) {
1260 dbg("%s", "Shutdown bulk read");
1261 usb_kill_urb(mos7840_port->read_urb);
1262 mos7840_port->read_urb_busy = false;
1264 if ((&mos7840_port->control_urb)) {
1265 dbg("%s", "Shutdown control read");
1266 /*/ usb_kill_urb (mos7840_port->control_urb); */
1269 /* if(mos7840_port->ctrl_buf != NULL) */
1270 /* kfree(mos7840_port->ctrl_buf); */
1271 port0->open_ports--;
1272 dbg("mos7840_num_open_ports in close%d:in port%d",
1273 port0->open_ports, port->number);
1274 if (port0->open_ports == 0) {
1275 if (serial->port[0]->interrupt_in_urb) {
1276 dbg("%s", "Shutdown interrupt_in_urb");
1277 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1281 if (mos7840_port->write_urb) {
1282 /* if this urb had a transfer buffer already (old tx) free it */
1283 if (mos7840_port->write_urb->transfer_buffer != NULL)
1284 kfree(mos7840_port->write_urb->transfer_buffer);
1285 usb_free_urb(mos7840_port->write_urb);
1289 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1292 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1294 mos7840_port->open = 0;
1296 dbg("%s", "Leaving ............");
1299 /************************************************************************
1301 * mos7840_block_until_chase_response
1303 * This function will block the close until one of the following:
1304 * 1. Response to our Chase comes from mos7840
1305 * 2. A timeout of 10 seconds without activity has expired
1306 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1308 ************************************************************************/
1310 static void mos7840_block_until_chase_response(struct tty_struct *tty,
1311 struct moschip_port *mos7840_port)
1313 int timeout = 1 * HZ;
1318 count = mos7840_chars_in_buffer(tty);
1320 /* Check for Buffer status */
1324 /* Block the thread for a while */
1325 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1327 /* No activity.. count down section */
1330 dbg("%s - TIMEOUT", __func__);
1333 /* Reset timeout value back to seconds */
1340 /*****************************************************************************
1342 * this function sends a break to the port
1343 *****************************************************************************/
1344 static void mos7840_break(struct tty_struct *tty, int break_state)
1346 struct usb_serial_port *port = tty->driver_data;
1348 struct usb_serial *serial;
1349 struct moschip_port *mos7840_port;
1351 dbg("%s", "Entering ...........");
1352 dbg("mos7840_break: Start");
1354 if (mos7840_port_paranoia_check(port, __func__)) {
1355 dbg("%s", "Port Paranoia failed");
1359 serial = mos7840_get_usb_serial(port, __func__);
1361 dbg("%s", "Serial Paranoia failed");
1365 mos7840_port = mos7840_get_port_private(port);
1367 if (mos7840_port == NULL)
1371 /* flush and block until tx is empty */
1372 mos7840_block_until_chase_response(tty, mos7840_port);
1374 if (break_state == -1)
1375 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1377 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1379 /* FIXME: no locking on shadowLCR anywhere in driver */
1380 mos7840_port->shadowLCR = data;
1381 dbg("mcs7840_break mos7840_port->shadowLCR is %x",
1382 mos7840_port->shadowLCR);
1383 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1384 mos7840_port->shadowLCR);
1387 /*****************************************************************************
1388 * mos7840_write_room
1389 * this function is called by the tty driver when it wants to know how many
1390 * bytes of data we can accept for a specific port.
1391 * If successful, we return the amount of room that we have for this port
1392 * Otherwise we return a negative error number.
1393 *****************************************************************************/
1395 static int mos7840_write_room(struct tty_struct *tty)
1397 struct usb_serial_port *port = tty->driver_data;
1400 unsigned long flags;
1401 struct moschip_port *mos7840_port;
1403 dbg("%s", " mos7840_write_room:entering ...........");
1405 if (mos7840_port_paranoia_check(port, __func__)) {
1406 dbg("%s", "Invalid port");
1407 dbg("%s", " mos7840_write_room:leaving ...........");
1411 mos7840_port = mos7840_get_port_private(port);
1412 if (mos7840_port == NULL) {
1413 dbg("%s", "mos7840_break:leaving ...........");
1417 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1418 for (i = 0; i < NUM_URBS; ++i) {
1419 if (!mos7840_port->busy[i])
1420 room += URB_TRANSFER_BUFFER_SIZE;
1422 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1424 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1425 dbg("%s - returns %d", __func__, room);
1430 /*****************************************************************************
1432 * this function is called by the tty driver when data should be written to
1434 * If successful, we return the number of bytes written, otherwise we
1435 * return a negative error number.
1436 *****************************************************************************/
1438 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1439 const unsigned char *data, int count)
1445 unsigned long flags;
1447 struct moschip_port *mos7840_port;
1448 struct usb_serial *serial;
1451 const unsigned char *current_position = data;
1452 unsigned char *data1;
1453 dbg("%s", "entering ...........");
1454 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1455 mos7840_port->shadowLCR); */
1459 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1460 mos7840_port->shadowLCR = Data;
1461 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data);
1462 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1463 mos7840_port->shadowLCR);
1466 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1467 /* mos7840_port->shadowLCR=Data;//Need to add later */
1469 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1470 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1473 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1475 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1476 dbg("mos7840_write:DLL value is %x", Data);
1479 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1480 dbg("mos7840_write:DLM value is %x", Data);
1482 Data = Data & ~SERIAL_LCR_DLAB;
1483 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1484 mos7840_port->shadowLCR);
1485 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1488 if (mos7840_port_paranoia_check(port, __func__)) {
1489 dbg("%s", "Port Paranoia failed");
1493 serial = port->serial;
1494 if (mos7840_serial_paranoia_check(serial, __func__)) {
1495 dbg("%s", "Serial Paranoia failed");
1499 mos7840_port = mos7840_get_port_private(port);
1500 if (mos7840_port == NULL) {
1501 dbg("%s", "mos7840_port is NULL");
1505 /* try to find a free urb in the list */
1508 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1509 for (i = 0; i < NUM_URBS; ++i) {
1510 if (!mos7840_port->busy[i]) {
1511 mos7840_port->busy[i] = 1;
1512 urb = mos7840_port->write_urb_pool[i];
1517 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1520 dbg("%s - no more free urbs", __func__);
1524 if (urb->transfer_buffer == NULL) {
1525 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
1528 if (urb->transfer_buffer == NULL) {
1529 dev_err(&port->dev, "%s no more kernel memory...\n",
1534 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1536 memcpy(urb->transfer_buffer, current_position, transfer_size);
1538 /* fill urb with data and submit */
1539 if ((serial->num_ports == 2)
1540 && ((((__u16)port->number -
1541 (__u16)(port->serial->minor)) % 2) != 0)) {
1542 usb_fill_bulk_urb(urb,
1544 usb_sndbulkpipe(serial->dev,
1545 (port->bulk_out_endpointAddress) + 2),
1546 urb->transfer_buffer,
1548 mos7840_bulk_out_data_callback, mos7840_port);
1550 usb_fill_bulk_urb(urb,
1552 usb_sndbulkpipe(serial->dev,
1553 port->bulk_out_endpointAddress),
1554 urb->transfer_buffer,
1556 mos7840_bulk_out_data_callback, mos7840_port);
1559 data1 = urb->transfer_buffer;
1560 dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress);
1562 /* send it down the pipe */
1563 status = usb_submit_urb(urb, GFP_ATOMIC);
1566 mos7840_port->busy[i] = 0;
1567 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
1568 "with status = %d\n", __func__, status);
1569 bytes_sent = status;
1572 bytes_sent = transfer_size;
1573 mos7840_port->icount.tx += transfer_size;
1575 dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx);
1581 /*****************************************************************************
1583 * this function is called by the tty driver when it wants to stop the data
1584 * being read from the port.
1585 *****************************************************************************/
1587 static void mos7840_throttle(struct tty_struct *tty)
1589 struct usb_serial_port *port = tty->driver_data;
1590 struct moschip_port *mos7840_port;
1593 if (mos7840_port_paranoia_check(port, __func__)) {
1594 dbg("%s", "Invalid port");
1598 dbg("- port %d", port->number);
1600 mos7840_port = mos7840_get_port_private(port);
1602 if (mos7840_port == NULL)
1605 if (!mos7840_port->open) {
1606 dbg("%s", "port not opened");
1610 dbg("%s", "Entering ..........");
1612 /* if we are implementing XON/XOFF, send the stop character */
1614 unsigned char stop_char = STOP_CHAR(tty);
1615 status = mos7840_write(tty, port, &stop_char, 1);
1619 /* if we are implementing RTS/CTS, toggle that line */
1620 if (tty->termios->c_cflag & CRTSCTS) {
1621 mos7840_port->shadowMCR &= ~MCR_RTS;
1622 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1623 mos7840_port->shadowMCR);
1629 /*****************************************************************************
1630 * mos7840_unthrottle
1631 * this function is called by the tty driver when it wants to resume
1632 * the data being read from the port (called after mos7840_throttle is
1634 *****************************************************************************/
1635 static void mos7840_unthrottle(struct tty_struct *tty)
1637 struct usb_serial_port *port = tty->driver_data;
1639 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1641 if (mos7840_port_paranoia_check(port, __func__)) {
1642 dbg("%s", "Invalid port");
1646 if (mos7840_port == NULL)
1649 if (!mos7840_port->open) {
1650 dbg("%s - port not opened", __func__);
1654 dbg("%s", "Entering ..........");
1656 /* if we are implementing XON/XOFF, send the start character */
1658 unsigned char start_char = START_CHAR(tty);
1659 status = mos7840_write(tty, port, &start_char, 1);
1664 /* if we are implementing RTS/CTS, toggle that line */
1665 if (tty->termios->c_cflag & CRTSCTS) {
1666 mos7840_port->shadowMCR |= MCR_RTS;
1667 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1668 mos7840_port->shadowMCR);
1674 static int mos7840_tiocmget(struct tty_struct *tty)
1676 struct usb_serial_port *port = tty->driver_data;
1677 struct moschip_port *mos7840_port;
1678 unsigned int result;
1682 mos7840_port = mos7840_get_port_private(port);
1684 dbg("%s - port %d", __func__, port->number);
1686 if (mos7840_port == NULL)
1689 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1692 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1695 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1696 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1697 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1698 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1699 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1700 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1701 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1703 dbg("%s - 0x%04X", __func__, result);
1708 static int mos7840_tiocmset(struct tty_struct *tty,
1709 unsigned int set, unsigned int clear)
1711 struct usb_serial_port *port = tty->driver_data;
1712 struct moschip_port *mos7840_port;
1716 dbg("%s - port %d", __func__, port->number);
1718 mos7840_port = mos7840_get_port_private(port);
1720 if (mos7840_port == NULL)
1723 /* FIXME: What locks the port registers ? */
1724 mcr = mos7840_port->shadowMCR;
1725 if (clear & TIOCM_RTS)
1727 if (clear & TIOCM_DTR)
1729 if (clear & TIOCM_LOOP)
1730 mcr &= ~MCR_LOOPBACK;
1732 if (set & TIOCM_RTS)
1734 if (set & TIOCM_DTR)
1736 if (set & TIOCM_LOOP)
1737 mcr |= MCR_LOOPBACK;
1739 mos7840_port->shadowMCR = mcr;
1741 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1743 dbg("setting MODEM_CONTROL_REGISTER Failed");
1750 /*****************************************************************************
1751 * mos7840_calc_baud_rate_divisor
1752 * this function calculates the proper baud rate divisor for the specified
1754 *****************************************************************************/
1755 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
1759 dbg("%s - %d", __func__, baudRate);
1761 if (baudRate <= 115200) {
1762 *divisor = 115200 / baudRate;
1765 if ((baudRate > 115200) && (baudRate <= 230400)) {
1766 *divisor = 230400 / baudRate;
1767 *clk_sel_val = 0x10;
1768 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1769 *divisor = 403200 / baudRate;
1770 *clk_sel_val = 0x20;
1771 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1772 *divisor = 460800 / baudRate;
1773 *clk_sel_val = 0x30;
1774 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1775 *divisor = 806400 / baudRate;
1776 *clk_sel_val = 0x40;
1777 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1778 *divisor = 921600 / baudRate;
1779 *clk_sel_val = 0x50;
1780 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1781 *divisor = 1572864 / baudRate;
1782 *clk_sel_val = 0x60;
1783 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1784 *divisor = 3145728 / baudRate;
1785 *clk_sel_val = 0x70;
1791 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1792 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1793 *divisor = mos7840_divisor_table[i].Divisor;
1798 /* After trying for all the standard baud rates *
1799 * Try calculating the divisor for this baud rate */
1801 if (baudrate > 75 && baudrate < 230400) {
1802 /* get the divisor */
1803 custom = (__u16) (230400L / baudrate);
1805 /* Check for round off */
1806 round1 = (__u16) (2304000L / baudrate);
1807 round = (__u16) (round1 - (custom * 10));
1812 dbg(" Baud %d = %d", baudrate, custom);
1816 dbg("%s", " Baud calculation Failed...");
1821 /*****************************************************************************
1822 * mos7840_send_cmd_write_baud_rate
1823 * this function sends the proper command to change the baud rate of the
1825 *****************************************************************************/
1827 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1833 unsigned char number;
1835 struct usb_serial_port *port;
1837 if (mos7840_port == NULL)
1840 port = (struct usb_serial_port *)mos7840_port->port;
1841 if (mos7840_port_paranoia_check(port, __func__)) {
1842 dbg("%s", "Invalid port");
1846 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
1847 dbg("%s", "Invalid Serial");
1851 dbg("%s", "Entering ..........");
1853 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1855 dbg("%s - port = %d, baud = %d", __func__,
1856 mos7840_port->port->number, baudRate);
1857 /* reset clk_uart_sel in spregOffset */
1858 if (baudRate > 115200) {
1859 #ifdef HW_flow_control
1860 /* NOTE: need to see the pther register to modify */
1861 /* setting h/w flow control bit to 1 */
1863 mos7840_port->shadowMCR = Data;
1864 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1867 dbg("Writing spreg failed in set_serial_baud");
1873 #ifdef HW_flow_control
1874 /* setting h/w flow control bit to 0 */
1876 mos7840_port->shadowMCR = Data;
1877 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1880 dbg("Writing spreg failed in set_serial_baud");
1887 if (1) { /* baudRate <= 115200) */
1890 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor,
1892 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1895 dbg("reading spreg failed in set_serial_baud");
1898 Data = (Data & 0x8f) | clk_sel_val;
1899 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1902 dbg("Writing spreg failed in set_serial_baud");
1905 /* Calculate the Divisor */
1908 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1911 /* Enable access to divisor latch */
1912 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1913 mos7840_port->shadowLCR = Data;
1914 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1916 /* Write the divisor */
1917 Data = (unsigned char)(divisor & 0xff);
1918 dbg("set_serial_baud Value to write DLL is %x", Data);
1919 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1921 Data = (unsigned char)((divisor & 0xff00) >> 8);
1922 dbg("set_serial_baud Value to write DLM is %x", Data);
1923 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1925 /* Disable access to divisor latch */
1926 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1927 mos7840_port->shadowLCR = Data;
1928 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1934 /*****************************************************************************
1935 * mos7840_change_port_settings
1936 * This routine is called to set the UART on the device to match
1937 * the specified new settings.
1938 *****************************************************************************/
1940 static void mos7840_change_port_settings(struct tty_struct *tty,
1941 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1951 struct usb_serial_port *port;
1952 struct usb_serial *serial;
1954 if (mos7840_port == NULL)
1957 port = (struct usb_serial_port *)mos7840_port->port;
1959 if (mos7840_port_paranoia_check(port, __func__)) {
1960 dbg("%s", "Invalid port");
1964 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
1965 dbg("%s", "Invalid Serial");
1969 serial = port->serial;
1971 dbg("%s - port %d", __func__, mos7840_port->port->number);
1973 if (!mos7840_port->open) {
1974 dbg("%s - port not opened", __func__);
1978 dbg("%s", "Entering ..........");
1982 lParity = LCR_PAR_NONE;
1984 cflag = tty->termios->c_cflag;
1985 iflag = tty->termios->c_iflag;
1987 /* Change the number of bits */
1988 switch (cflag & CSIZE) {
2007 /* Change the Parity bit */
2008 if (cflag & PARENB) {
2009 if (cflag & PARODD) {
2010 lParity = LCR_PAR_ODD;
2011 dbg("%s - parity = odd", __func__);
2013 lParity = LCR_PAR_EVEN;
2014 dbg("%s - parity = even", __func__);
2018 dbg("%s - parity = none", __func__);
2022 lParity = lParity | 0x20;
2024 /* Change the Stop bit */
2025 if (cflag & CSTOPB) {
2027 dbg("%s - stop bits = 2", __func__);
2030 dbg("%s - stop bits = 1", __func__);
2033 /* Update the LCR with the correct value */
2034 mos7840_port->shadowLCR &=
2035 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2036 mos7840_port->shadowLCR |= (lData | lParity | lStop);
2038 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x",
2039 mos7840_port->shadowLCR);
2040 /* Disable Interrupts */
2042 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2045 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2048 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2050 /* Send the updated LCR value to the mos7840 */
2051 Data = mos7840_port->shadowLCR;
2053 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2056 mos7840_port->shadowMCR = Data;
2057 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2059 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2061 /* set up the MCR register and send it to the mos7840 */
2063 mos7840_port->shadowMCR = MCR_MASTER_IE;
2065 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2067 if (cflag & CRTSCTS)
2068 mos7840_port->shadowMCR |= (MCR_XON_ANY);
2070 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
2072 Data = mos7840_port->shadowMCR;
2073 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2075 /* Determine divisor based on baud rate */
2076 baud = tty_get_baud_rate(tty);
2079 /* pick a default, any default... */
2080 dbg("%s", "Picked default baud...");
2084 dbg("%s - baud rate = %d", __func__, baud);
2085 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2087 /* Enable Interrupts */
2089 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2091 if (mos7840_port->read_urb_busy == false) {
2092 mos7840_port->read_urb->dev = serial->dev;
2093 mos7840_port->read_urb_busy = true;
2094 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2096 dbg("usb_submit_urb(read bulk) failed, status = %d",
2098 mos7840_port->read_urb_busy = false;
2101 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x",
2102 mos7840_port->shadowLCR);
2105 /*****************************************************************************
2106 * mos7840_set_termios
2107 * this function is called by the tty driver when it wants to change
2108 * the termios structure
2109 *****************************************************************************/
2111 static void mos7840_set_termios(struct tty_struct *tty,
2112 struct usb_serial_port *port,
2113 struct ktermios *old_termios)
2117 struct usb_serial *serial;
2118 struct moschip_port *mos7840_port;
2119 dbg("mos7840_set_termios: START");
2120 if (mos7840_port_paranoia_check(port, __func__)) {
2121 dbg("%s", "Invalid port");
2125 serial = port->serial;
2127 if (mos7840_serial_paranoia_check(serial, __func__)) {
2128 dbg("%s", "Invalid Serial");
2132 mos7840_port = mos7840_get_port_private(port);
2134 if (mos7840_port == NULL)
2137 if (!mos7840_port->open) {
2138 dbg("%s - port not opened", __func__);
2142 dbg("%s", "setting termios - ");
2144 cflag = tty->termios->c_cflag;
2146 dbg("%s - clfag %08x iflag %08x", __func__,
2147 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
2148 dbg("%s - old clfag %08x old iflag %08x", __func__,
2149 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2150 dbg("%s - port %d", __func__, port->number);
2152 /* change the port settings to the new ones specified */
2154 mos7840_change_port_settings(tty, mos7840_port, old_termios);
2156 if (!mos7840_port->read_urb) {
2157 dbg("%s", "URB KILLED !!!!!");
2161 if (mos7840_port->read_urb_busy == false) {
2162 mos7840_port->read_urb->dev = serial->dev;
2163 mos7840_port->read_urb_busy = true;
2164 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2166 dbg("usb_submit_urb(read bulk) failed, status = %d",
2168 mos7840_port->read_urb_busy = false;
2173 /*****************************************************************************
2174 * mos7840_get_lsr_info - get line status register info
2176 * Purpose: Let user call ioctl() to get info when the UART physically
2177 * is emptied. On bus types like RS485, the transmitter must
2178 * release the bus after transmitting. This must be done when
2179 * the transmit shift register is empty, not be done when the
2180 * transmit holding register is empty. This functionality
2181 * allows an RS485 driver to be written in user space.
2182 *****************************************************************************/
2184 static int mos7840_get_lsr_info(struct tty_struct *tty,
2185 unsigned int __user *value)
2188 unsigned int result = 0;
2190 count = mos7840_chars_in_buffer(tty);
2192 dbg("%s -- Empty", __func__);
2193 result = TIOCSER_TEMT;
2196 if (copy_to_user(value, &result, sizeof(int)))
2201 /*****************************************************************************
2202 * mos7840_get_serial_info
2203 * function to get information about serial port
2204 *****************************************************************************/
2206 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2207 struct serial_struct __user *retinfo)
2209 struct serial_struct tmp;
2211 if (mos7840_port == NULL)
2217 memset(&tmp, 0, sizeof(tmp));
2219 tmp.type = PORT_16550A;
2220 tmp.line = mos7840_port->port->serial->minor;
2221 tmp.port = mos7840_port->port->number;
2223 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2224 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2225 tmp.baud_base = 9600;
2226 tmp.close_delay = 5 * HZ;
2227 tmp.closing_wait = 30 * HZ;
2229 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2234 static int mos7840_get_icount(struct tty_struct *tty,
2235 struct serial_icounter_struct *icount)
2237 struct usb_serial_port *port = tty->driver_data;
2238 struct moschip_port *mos7840_port;
2239 struct async_icount cnow;
2241 mos7840_port = mos7840_get_port_private(port);
2242 cnow = mos7840_port->icount;
2245 icount->cts = cnow.cts;
2246 icount->dsr = cnow.dsr;
2247 icount->rng = cnow.rng;
2248 icount->dcd = cnow.dcd;
2249 icount->rx = cnow.rx;
2250 icount->tx = cnow.tx;
2251 icount->frame = cnow.frame;
2252 icount->overrun = cnow.overrun;
2253 icount->parity = cnow.parity;
2254 icount->brk = cnow.brk;
2255 icount->buf_overrun = cnow.buf_overrun;
2257 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
2258 port->number, icount->rx, icount->tx);
2262 /*****************************************************************************
2264 * this function handles any ioctl calls to the driver
2265 *****************************************************************************/
2267 static int mos7840_ioctl(struct tty_struct *tty,
2268 unsigned int cmd, unsigned long arg)
2270 struct usb_serial_port *port = tty->driver_data;
2271 void __user *argp = (void __user *)arg;
2272 struct moschip_port *mos7840_port;
2274 struct async_icount cnow;
2275 struct async_icount cprev;
2277 if (mos7840_port_paranoia_check(port, __func__)) {
2278 dbg("%s", "Invalid port");
2282 mos7840_port = mos7840_get_port_private(port);
2284 if (mos7840_port == NULL)
2287 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
2290 /* return number of bytes available */
2293 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
2294 return mos7840_get_lsr_info(tty, argp);
2297 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
2298 return mos7840_get_serial_info(mos7840_port, argp);
2301 dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
2305 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
2306 cprev = mos7840_port->icount;
2308 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2309 mos7840_port->delta_msr_cond = 0;
2310 wait_event_interruptible(port->delta_msr_wait,
2311 (port->serial->disconnected ||
2313 delta_msr_cond == 1));
2315 /* see if a signal did it */
2316 if (signal_pending(current))
2317 return -ERESTARTSYS;
2319 if (port->serial->disconnected)
2322 cnow = mos7840_port->icount;
2324 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2325 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2326 return -EIO; /* no change => error */
2327 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2328 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2329 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2330 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2341 return -ENOIOCTLCMD;
2344 static int mos7840_calc_num_ports(struct usb_serial *serial)
2348 int mos7840_num_ports;
2350 ret = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2351 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &Data,
2352 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2354 if ((Data & 0x01) == 0) {
2355 mos7840_num_ports = 2;
2356 serial->num_bulk_in = 2;
2357 serial->num_bulk_out = 2;
2358 serial->num_ports = 2;
2360 mos7840_num_ports = 4;
2361 serial->num_bulk_in = 4;
2362 serial->num_bulk_out = 4;
2363 serial->num_ports = 4;
2366 return mos7840_num_ports;
2369 /****************************************************************************
2371 ****************************************************************************/
2373 static int mos7840_startup(struct usb_serial *serial)
2375 struct moschip_port *mos7840_port;
2376 struct usb_device *dev;
2380 dbg("%s", "mos7840_startup :Entering..........");
2383 dbg("%s", "Invalid Handler");
2387 if (serial->num_bulk_in < serial->num_ports ||
2388 serial->num_bulk_out < serial->num_ports) {
2389 dev_err(&serial->interface->dev, "missing endpoints\n");
2395 dbg("%s", "Entering...");
2396 dbg ("mos7840_startup: serial = %p", serial);
2398 /* we set up the pointers to the endpoints in the mos7840_open *
2399 * function, as the structures aren't created yet. */
2401 /* set up port private structures */
2402 for (i = 0; i < serial->num_ports; ++i) {
2403 dbg ("mos7840_startup: configuring port %d............", i);
2404 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2405 if (mos7840_port == NULL) {
2406 dev_err(&dev->dev, "%s - Out of memory\n", __func__);
2408 i--; /* don't follow NULL pointer cleaning up */
2412 /* Initialize all port interrupt end point to port 0 int
2413 * endpoint. Our device has only one interrupt end point
2414 * common to all port */
2416 mos7840_port->port = serial->port[i];
2417 mos7840_set_port_private(serial->port[i], mos7840_port);
2418 spin_lock_init(&mos7840_port->pool_lock);
2420 /* minor is not initialised until later by
2421 * usb-serial.c:get_free_serial() and cannot therefore be used
2422 * to index device instances */
2423 mos7840_port->port_num = i + 1;
2424 dbg ("serial->port[i]->number = %d", serial->port[i]->number);
2425 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor);
2426 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num);
2427 dbg ("serial->minor = %d", serial->minor);
2429 if (mos7840_port->port_num == 1) {
2430 mos7840_port->SpRegOffset = 0x0;
2431 mos7840_port->ControlRegOffset = 0x1;
2432 mos7840_port->DcrRegOffset = 0x4;
2433 } else if ((mos7840_port->port_num == 2)
2434 && (serial->num_ports == 4)) {
2435 mos7840_port->SpRegOffset = 0x8;
2436 mos7840_port->ControlRegOffset = 0x9;
2437 mos7840_port->DcrRegOffset = 0x16;
2438 } else if ((mos7840_port->port_num == 2)
2439 && (serial->num_ports == 2)) {
2440 mos7840_port->SpRegOffset = 0xa;
2441 mos7840_port->ControlRegOffset = 0xb;
2442 mos7840_port->DcrRegOffset = 0x19;
2443 } else if ((mos7840_port->port_num == 3)
2444 && (serial->num_ports == 4)) {
2445 mos7840_port->SpRegOffset = 0xa;
2446 mos7840_port->ControlRegOffset = 0xb;
2447 mos7840_port->DcrRegOffset = 0x19;
2448 } else if ((mos7840_port->port_num == 4)
2449 && (serial->num_ports == 4)) {
2450 mos7840_port->SpRegOffset = 0xc;
2451 mos7840_port->ControlRegOffset = 0xd;
2452 mos7840_port->DcrRegOffset = 0x1c;
2454 mos7840_dump_serial_port(mos7840_port);
2455 mos7840_set_port_private(serial->port[i], mos7840_port);
2457 /* enable rx_disable bit in control register */
2458 status = mos7840_get_reg_sync(serial->port[i],
2459 mos7840_port->ControlRegOffset, &Data);
2461 dbg("Reading ControlReg failed status-0x%x", status);
2464 dbg("ControlReg Reading success val is %x, status%d",
2466 Data |= 0x08; /* setting driver done bit */
2467 Data |= 0x04; /* sp1_bit to have cts change reflect in
2470 /* Data |= 0x20; //rx_disable bit */
2471 status = mos7840_set_reg_sync(serial->port[i],
2472 mos7840_port->ControlRegOffset, Data);
2474 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status);
2477 dbg("ControlReg Writing success(rx_disable) status%d",
2480 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2483 status = mos7840_set_reg_sync(serial->port[i],
2484 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2486 dbg("Writing DCR0 failed status-0x%x", status);
2489 dbg("DCR0 Writing success status%d", status);
2492 status = mos7840_set_reg_sync(serial->port[i],
2493 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2495 dbg("Writing DCR1 failed status-0x%x", status);
2498 dbg("DCR1 Writing success status%d", status);
2501 status = mos7840_set_reg_sync(serial->port[i],
2502 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2504 dbg("Writing DCR2 failed status-0x%x", status);
2507 dbg("DCR2 Writing success status%d", status);
2509 /* write values in clkstart0x0 and clkmulti 0x20 */
2511 status = mos7840_set_reg_sync(serial->port[i],
2512 CLK_START_VALUE_REGISTER, Data);
2514 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status);
2517 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status);
2520 status = mos7840_set_reg_sync(serial->port[i],
2521 CLK_MULTI_REGISTER, Data);
2523 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x",
2527 dbg("CLK_MULTI_REGISTER Writing success status%d",
2530 /* write value 0x0 to scratchpad register */
2532 status = mos7840_set_uart_reg(serial->port[i],
2533 SCRATCH_PAD_REGISTER, Data);
2535 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x",
2539 dbg("SCRATCH_PAD_REGISTER Writing success status%d",
2542 /* Zero Length flag register */
2543 if ((mos7840_port->port_num != 1)
2544 && (serial->num_ports == 2)) {
2547 status = mos7840_set_reg_sync(serial->port[i],
2549 ((__u16)mos7840_port->port_num)), Data);
2550 dbg("ZLIP offset %x",
2552 ((__u16) mos7840_port->port_num)));
2554 dbg("Writing ZLP_REG%d failed status-0x%x",
2558 dbg("ZLP_REG%d Writing success status%d",
2562 status = mos7840_set_reg_sync(serial->port[i],
2564 ((__u16)mos7840_port->port_num) - 0x1), Data);
2565 dbg("ZLIP offset %x",
2567 ((__u16) mos7840_port->port_num) - 0x1));
2569 dbg("Writing ZLP_REG%d failed status-0x%x",
2573 dbg("ZLP_REG%d Writing success status%d",
2577 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2578 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2579 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2581 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2582 !mos7840_port->dr) {
2587 dbg ("mos7840_startup: all ports configured...........");
2589 /* Zero Length flag enable */
2591 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2593 dbg("Writing ZLP_REG5 failed status-0x%x", status);
2596 dbg("ZLP_REG5 Writing success status%d", status);
2598 /* setting configuration feature to one */
2599 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2600 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
2603 for (/* nothing */; i >= 0; i--) {
2604 mos7840_port = mos7840_get_port_private(serial->port[i]);
2606 kfree(mos7840_port->dr);
2607 kfree(mos7840_port->ctrl_buf);
2608 usb_free_urb(mos7840_port->control_urb);
2609 kfree(mos7840_port);
2614 /****************************************************************************
2615 * mos7840_disconnect
2616 * This function is called whenever the device is removed from the usb bus.
2617 ****************************************************************************/
2619 static void mos7840_disconnect(struct usb_serial *serial)
2622 struct moschip_port *mos7840_port;
2623 dbg("%s", " disconnect :entering..........");
2626 dbg("%s", "Invalid Handler");
2630 /* check for the ports to be closed,close the ports and disconnect */
2632 /* free private structure allocated for serial port *
2633 * stop reads and writes on all ports */
2635 for (i = 0; i < serial->num_ports; ++i) {
2636 mos7840_port = mos7840_get_port_private(serial->port[i]);
2637 dbg ("mos7840_port %d = %p", i, mos7840_port);
2639 usb_kill_urb(mos7840_port->control_urb);
2643 dbg("%s", "Thank u :: ");
2647 /****************************************************************************
2649 * This function is called when the usb_serial structure is freed.
2650 ****************************************************************************/
2652 static void mos7840_release(struct usb_serial *serial)
2655 struct moschip_port *mos7840_port;
2656 dbg("%s", " release :entering..........");
2659 dbg("%s", "Invalid Handler");
2663 /* check for the ports to be closed,close the ports and disconnect */
2665 /* free private structure allocated for serial port *
2666 * stop reads and writes on all ports */
2668 for (i = 0; i < serial->num_ports; ++i) {
2669 mos7840_port = mos7840_get_port_private(serial->port[i]);
2670 dbg("mos7840_port %d = %p", i, mos7840_port);
2672 usb_free_urb(mos7840_port->control_urb);
2673 kfree(mos7840_port->ctrl_buf);
2674 kfree(mos7840_port->dr);
2675 kfree(mos7840_port);
2679 dbg("%s", "Thank u :: ");
2683 static struct usb_driver io_driver = {
2685 .probe = usb_serial_probe,
2686 .disconnect = usb_serial_disconnect,
2687 .id_table = moschip_id_table_combined,
2691 static struct usb_serial_driver moschip7840_4port_device = {
2693 .owner = THIS_MODULE,
2696 .description = DRIVER_DESC,
2697 .usb_driver = &io_driver,
2698 .id_table = moschip_port_id_table,
2700 .open = mos7840_open,
2701 .close = mos7840_close,
2702 .write = mos7840_write,
2703 .write_room = mos7840_write_room,
2704 .chars_in_buffer = mos7840_chars_in_buffer,
2705 .throttle = mos7840_throttle,
2706 .unthrottle = mos7840_unthrottle,
2707 .calc_num_ports = mos7840_calc_num_ports,
2708 #ifdef MCSSerialProbe
2709 .probe = mos7840_serial_probe,
2711 .ioctl = mos7840_ioctl,
2712 .set_termios = mos7840_set_termios,
2713 .break_ctl = mos7840_break,
2714 .tiocmget = mos7840_tiocmget,
2715 .tiocmset = mos7840_tiocmset,
2716 .get_icount = mos7840_get_icount,
2717 .attach = mos7840_startup,
2718 .disconnect = mos7840_disconnect,
2719 .release = mos7840_release,
2720 .read_bulk_callback = mos7840_bulk_in_callback,
2721 .read_int_callback = mos7840_interrupt_callback,
2724 /****************************************************************************
2726 * This is called by the module subsystem, or on startup to initialize us
2727 ****************************************************************************/
2728 static int __init moschip7840_init(void)
2732 dbg("%s", " mos7840_init :entering..........");
2734 /* Register with the usb serial */
2735 retval = usb_serial_register(&moschip7840_4port_device);
2738 goto failed_port_device_register;
2740 dbg("%s", "Entering...");
2741 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
2744 /* Register with the usb */
2745 retval = usb_register(&io_driver);
2747 dbg("%s", "Leaving...");
2750 usb_serial_deregister(&moschip7840_4port_device);
2751 failed_port_device_register:
2755 /****************************************************************************
2757 * Called when the driver is about to be unloaded.
2758 ****************************************************************************/
2759 static void __exit moschip7840_exit(void)
2762 dbg("%s", " mos7840_exit :entering..........");
2764 usb_deregister(&io_driver);
2766 usb_serial_deregister(&moschip7840_4port_device);
2768 dbg("%s", "Entering...");
2771 module_init(moschip7840_init);
2772 module_exit(moschip7840_exit);
2774 /* Module information */
2775 MODULE_DESCRIPTION(DRIVER_DESC);
2776 MODULE_LICENSE("GPL");
2778 module_param(debug, bool, S_IRUGO | S_IWUSR);
2779 MODULE_PARM_DESC(debug, "Debug enabled or not");