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 *
1075 * will continue as long as mos7840 is connected */
1078 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1081 dev_err(&port->dev, "%s - Error %d submitting "
1082 "interrupt urb\n", __func__, response);
1089 /* see if we've set up our endpoint info yet *
1090 * (can't set it up in mos7840_startup as the *
1091 * structures were not set up at that time.) */
1093 dbg("port number is %d", port->number);
1094 dbg("serial number is %d", port->serial->minor);
1095 dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress);
1096 dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress);
1097 dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress);
1098 dbg("port's number in the device is %d", mos7840_port->port_num);
1099 mos7840_port->read_urb = port->read_urb;
1101 /* set up our bulk in urb */
1102 if ((serial->num_ports == 2)
1103 && ((((__u16)port->number -
1104 (__u16)(port->serial->minor)) % 2) != 0)) {
1105 usb_fill_bulk_urb(mos7840_port->read_urb,
1107 usb_rcvbulkpipe(serial->dev,
1108 (port->bulk_in_endpointAddress) + 2),
1109 port->bulk_in_buffer,
1110 mos7840_port->read_urb->transfer_buffer_length,
1111 mos7840_bulk_in_callback, mos7840_port);
1113 usb_fill_bulk_urb(mos7840_port->read_urb,
1115 usb_rcvbulkpipe(serial->dev,
1116 port->bulk_in_endpointAddress),
1117 port->bulk_in_buffer,
1118 mos7840_port->read_urb->transfer_buffer_length,
1119 mos7840_bulk_in_callback, mos7840_port);
1122 dbg("mos7840_open: bulkin endpoint is %d",
1123 port->bulk_in_endpointAddress);
1124 mos7840_port->read_urb_busy = true;
1125 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1127 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1128 __func__, response);
1129 mos7840_port->read_urb_busy = false;
1132 /* initialize our wait queues */
1133 init_waitqueue_head(&mos7840_port->wait_chase);
1135 /* initialize our icount structure */
1136 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1138 /* initialize our port settings */
1139 /* Must set to enable ints! */
1140 mos7840_port->shadowMCR = MCR_MASTER_IE;
1141 /* send a open port command */
1142 mos7840_port->open = 1;
1143 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1144 mos7840_port->icount.tx = 0;
1145 mos7840_port->icount.rx = 0;
1147 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p",
1148 serial, mos7840_port, port);
1150 dbg ("%s leave", __func__);
1154 for (j = 0; j < NUM_URBS; ++j) {
1155 urb = mos7840_port->write_urb_pool[j];
1158 kfree(urb->transfer_buffer);
1164 /*****************************************************************************
1165 * mos7840_chars_in_buffer
1166 * this function is called by the tty driver when it wants to know how many
1167 * bytes of data we currently have outstanding in the port (data that has
1168 * been written, but hasn't made it out the port yet)
1169 * If successful, we return the number of bytes left to be written in the
1171 * Otherwise we return zero.
1172 *****************************************************************************/
1174 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1176 struct usb_serial_port *port = tty->driver_data;
1179 unsigned long flags;
1180 struct moschip_port *mos7840_port;
1182 dbg("%s", " mos7840_chars_in_buffer:entering ...........");
1184 if (mos7840_port_paranoia_check(port, __func__)) {
1185 dbg("%s", "Invalid port");
1189 mos7840_port = mos7840_get_port_private(port);
1190 if (mos7840_port == NULL) {
1191 dbg("%s", "mos7840_break:leaving ...........");
1195 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1196 for (i = 0; i < NUM_URBS; ++i) {
1197 if (mos7840_port->busy[i]) {
1198 struct urb *urb = mos7840_port->write_urb_pool[i];
1199 chars += urb->transfer_buffer_length;
1202 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1203 dbg("%s - returns %d", __func__, chars);
1208 /*****************************************************************************
1210 * this function is called by the tty driver when a port is closed
1211 *****************************************************************************/
1213 static void mos7840_close(struct usb_serial_port *port)
1215 struct usb_serial *serial;
1216 struct moschip_port *mos7840_port;
1217 struct moschip_port *port0;
1221 dbg("%s", "mos7840_close:entering...");
1223 if (mos7840_port_paranoia_check(port, __func__)) {
1224 dbg("%s", "Port Paranoia failed");
1228 serial = mos7840_get_usb_serial(port, __func__);
1230 dbg("%s", "Serial Paranoia failed");
1234 mos7840_port = mos7840_get_port_private(port);
1235 port0 = mos7840_get_port_private(serial->port[0]);
1237 if (mos7840_port == NULL || port0 == NULL)
1240 for (j = 0; j < NUM_URBS; ++j)
1241 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1243 /* Freeing Write URBs */
1244 for (j = 0; j < NUM_URBS; ++j) {
1245 if (mos7840_port->write_urb_pool[j]) {
1246 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1247 kfree(mos7840_port->write_urb_pool[j]->
1250 usb_free_urb(mos7840_port->write_urb_pool[j]);
1254 /* While closing port, shutdown all bulk read, write *
1255 * and interrupt read if they exists */
1257 if (mos7840_port->write_urb) {
1258 dbg("%s", "Shutdown bulk write");
1259 usb_kill_urb(mos7840_port->write_urb);
1261 if (mos7840_port->read_urb) {
1262 dbg("%s", "Shutdown bulk read");
1263 usb_kill_urb(mos7840_port->read_urb);
1264 mos7840_port->read_urb_busy = false;
1266 if ((&mos7840_port->control_urb)) {
1267 dbg("%s", "Shutdown control read");
1268 /*/ usb_kill_urb (mos7840_port->control_urb); */
1271 /* if(mos7840_port->ctrl_buf != NULL) */
1272 /* kfree(mos7840_port->ctrl_buf); */
1273 port0->open_ports--;
1274 dbg("mos7840_num_open_ports in close%d:in port%d",
1275 port0->open_ports, port->number);
1276 if (port0->open_ports == 0) {
1277 if (serial->port[0]->interrupt_in_urb) {
1278 dbg("%s", "Shutdown interrupt_in_urb");
1279 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1283 if (mos7840_port->write_urb) {
1284 /* if this urb had a transfer buffer already (old tx) free it */
1285 if (mos7840_port->write_urb->transfer_buffer != NULL)
1286 kfree(mos7840_port->write_urb->transfer_buffer);
1287 usb_free_urb(mos7840_port->write_urb);
1291 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1294 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1296 mos7840_port->open = 0;
1298 dbg("%s", "Leaving ............");
1301 /************************************************************************
1303 * mos7840_block_until_chase_response
1305 * This function will block the close until one of the following:
1306 * 1. Response to our Chase comes from mos7840
1307 * 2. A timeout of 10 seconds without activity has expired
1308 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1310 ************************************************************************/
1312 static void mos7840_block_until_chase_response(struct tty_struct *tty,
1313 struct moschip_port *mos7840_port)
1315 int timeout = 1 * HZ;
1320 count = mos7840_chars_in_buffer(tty);
1322 /* Check for Buffer status */
1326 /* Block the thread for a while */
1327 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1329 /* No activity.. count down section */
1332 dbg("%s - TIMEOUT", __func__);
1335 /* Reset timeout value back to seconds */
1342 /*****************************************************************************
1344 * this function sends a break to the port
1345 *****************************************************************************/
1346 static void mos7840_break(struct tty_struct *tty, int break_state)
1348 struct usb_serial_port *port = tty->driver_data;
1350 struct usb_serial *serial;
1351 struct moschip_port *mos7840_port;
1353 dbg("%s", "Entering ...........");
1354 dbg("mos7840_break: Start");
1356 if (mos7840_port_paranoia_check(port, __func__)) {
1357 dbg("%s", "Port Paranoia failed");
1361 serial = mos7840_get_usb_serial(port, __func__);
1363 dbg("%s", "Serial Paranoia failed");
1367 mos7840_port = mos7840_get_port_private(port);
1369 if (mos7840_port == NULL)
1373 /* flush and block until tx is empty */
1374 mos7840_block_until_chase_response(tty, mos7840_port);
1376 if (break_state == -1)
1377 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1379 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1381 /* FIXME: no locking on shadowLCR anywhere in driver */
1382 mos7840_port->shadowLCR = data;
1383 dbg("mcs7840_break mos7840_port->shadowLCR is %x",
1384 mos7840_port->shadowLCR);
1385 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1386 mos7840_port->shadowLCR);
1389 /*****************************************************************************
1390 * mos7840_write_room
1391 * this function is called by the tty driver when it wants to know how many
1392 * bytes of data we can accept for a specific port.
1393 * If successful, we return the amount of room that we have for this port
1394 * Otherwise we return a negative error number.
1395 *****************************************************************************/
1397 static int mos7840_write_room(struct tty_struct *tty)
1399 struct usb_serial_port *port = tty->driver_data;
1402 unsigned long flags;
1403 struct moschip_port *mos7840_port;
1405 dbg("%s", " mos7840_write_room:entering ...........");
1407 if (mos7840_port_paranoia_check(port, __func__)) {
1408 dbg("%s", "Invalid port");
1409 dbg("%s", " mos7840_write_room:leaving ...........");
1413 mos7840_port = mos7840_get_port_private(port);
1414 if (mos7840_port == NULL) {
1415 dbg("%s", "mos7840_break:leaving ...........");
1419 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1420 for (i = 0; i < NUM_URBS; ++i) {
1421 if (!mos7840_port->busy[i])
1422 room += URB_TRANSFER_BUFFER_SIZE;
1424 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1426 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1427 dbg("%s - returns %d", __func__, room);
1432 /*****************************************************************************
1434 * this function is called by the tty driver when data should be written to
1436 * If successful, we return the number of bytes written, otherwise we
1437 * return a negative error number.
1438 *****************************************************************************/
1440 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1441 const unsigned char *data, int count)
1447 unsigned long flags;
1449 struct moschip_port *mos7840_port;
1450 struct usb_serial *serial;
1453 const unsigned char *current_position = data;
1454 unsigned char *data1;
1455 dbg("%s", "entering ...........");
1456 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1457 mos7840_port->shadowLCR); */
1461 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1462 mos7840_port->shadowLCR = Data;
1463 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data);
1464 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1465 mos7840_port->shadowLCR);
1468 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1469 /* mos7840_port->shadowLCR=Data;//Need to add later */
1471 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1472 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1475 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1477 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1478 dbg("mos7840_write:DLL value is %x", Data);
1481 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1482 dbg("mos7840_write:DLM value is %x", Data);
1484 Data = Data & ~SERIAL_LCR_DLAB;
1485 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1486 mos7840_port->shadowLCR);
1487 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1490 if (mos7840_port_paranoia_check(port, __func__)) {
1491 dbg("%s", "Port Paranoia failed");
1495 serial = port->serial;
1496 if (mos7840_serial_paranoia_check(serial, __func__)) {
1497 dbg("%s", "Serial Paranoia failed");
1501 mos7840_port = mos7840_get_port_private(port);
1502 if (mos7840_port == NULL) {
1503 dbg("%s", "mos7840_port is NULL");
1507 /* try to find a free urb in the list */
1510 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1511 for (i = 0; i < NUM_URBS; ++i) {
1512 if (!mos7840_port->busy[i]) {
1513 mos7840_port->busy[i] = 1;
1514 urb = mos7840_port->write_urb_pool[i];
1519 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1522 dbg("%s - no more free urbs", __func__);
1526 if (urb->transfer_buffer == NULL) {
1527 urb->transfer_buffer =
1528 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1530 if (urb->transfer_buffer == NULL) {
1531 dev_err(&port->dev, "%s no more kernel memory...\n",
1536 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1538 memcpy(urb->transfer_buffer, current_position, transfer_size);
1540 /* fill urb with data and submit */
1541 if ((serial->num_ports == 2)
1542 && ((((__u16)port->number -
1543 (__u16)(port->serial->minor)) % 2) != 0)) {
1544 usb_fill_bulk_urb(urb,
1546 usb_sndbulkpipe(serial->dev,
1547 (port->bulk_out_endpointAddress) + 2),
1548 urb->transfer_buffer,
1550 mos7840_bulk_out_data_callback, mos7840_port);
1552 usb_fill_bulk_urb(urb,
1554 usb_sndbulkpipe(serial->dev,
1555 port->bulk_out_endpointAddress),
1556 urb->transfer_buffer,
1558 mos7840_bulk_out_data_callback, mos7840_port);
1561 data1 = urb->transfer_buffer;
1562 dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress);
1564 /* send it down the pipe */
1565 status = usb_submit_urb(urb, GFP_ATOMIC);
1568 mos7840_port->busy[i] = 0;
1569 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
1570 "with status = %d\n", __func__, status);
1571 bytes_sent = status;
1574 bytes_sent = transfer_size;
1575 mos7840_port->icount.tx += transfer_size;
1577 dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx);
1583 /*****************************************************************************
1585 * this function is called by the tty driver when it wants to stop the data
1586 * being read from the port.
1587 *****************************************************************************/
1589 static void mos7840_throttle(struct tty_struct *tty)
1591 struct usb_serial_port *port = tty->driver_data;
1592 struct moschip_port *mos7840_port;
1595 if (mos7840_port_paranoia_check(port, __func__)) {
1596 dbg("%s", "Invalid port");
1600 dbg("- port %d", port->number);
1602 mos7840_port = mos7840_get_port_private(port);
1604 if (mos7840_port == NULL)
1607 if (!mos7840_port->open) {
1608 dbg("%s", "port not opened");
1612 dbg("%s", "Entering ..........");
1614 /* if we are implementing XON/XOFF, send the stop character */
1616 unsigned char stop_char = STOP_CHAR(tty);
1617 status = mos7840_write(tty, port, &stop_char, 1);
1621 /* if we are implementing RTS/CTS, toggle that line */
1622 if (tty->termios->c_cflag & CRTSCTS) {
1623 mos7840_port->shadowMCR &= ~MCR_RTS;
1624 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1625 mos7840_port->shadowMCR);
1631 /*****************************************************************************
1632 * mos7840_unthrottle
1633 * this function is called by the tty driver when it wants to resume
1634 * the data being read from the port (called after mos7840_throttle is
1636 *****************************************************************************/
1637 static void mos7840_unthrottle(struct tty_struct *tty)
1639 struct usb_serial_port *port = tty->driver_data;
1641 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1643 if (mos7840_port_paranoia_check(port, __func__)) {
1644 dbg("%s", "Invalid port");
1648 if (mos7840_port == NULL)
1651 if (!mos7840_port->open) {
1652 dbg("%s - port not opened", __func__);
1656 dbg("%s", "Entering ..........");
1658 /* if we are implementing XON/XOFF, send the start character */
1660 unsigned char start_char = START_CHAR(tty);
1661 status = mos7840_write(tty, port, &start_char, 1);
1666 /* if we are implementing RTS/CTS, toggle that line */
1667 if (tty->termios->c_cflag & CRTSCTS) {
1668 mos7840_port->shadowMCR |= MCR_RTS;
1669 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1670 mos7840_port->shadowMCR);
1676 static int mos7840_tiocmget(struct tty_struct *tty)
1678 struct usb_serial_port *port = tty->driver_data;
1679 struct moschip_port *mos7840_port;
1680 unsigned int result;
1684 mos7840_port = mos7840_get_port_private(port);
1686 dbg("%s - port %d", __func__, port->number);
1688 if (mos7840_port == NULL)
1691 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1694 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1697 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1698 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1699 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1700 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1701 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1702 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1703 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1705 dbg("%s - 0x%04X", __func__, result);
1710 static int mos7840_tiocmset(struct tty_struct *tty,
1711 unsigned int set, unsigned int clear)
1713 struct usb_serial_port *port = tty->driver_data;
1714 struct moschip_port *mos7840_port;
1718 dbg("%s - port %d", __func__, port->number);
1720 mos7840_port = mos7840_get_port_private(port);
1722 if (mos7840_port == NULL)
1725 /* FIXME: What locks the port registers ? */
1726 mcr = mos7840_port->shadowMCR;
1727 if (clear & TIOCM_RTS)
1729 if (clear & TIOCM_DTR)
1731 if (clear & TIOCM_LOOP)
1732 mcr &= ~MCR_LOOPBACK;
1734 if (set & TIOCM_RTS)
1736 if (set & TIOCM_DTR)
1738 if (set & TIOCM_LOOP)
1739 mcr |= MCR_LOOPBACK;
1741 mos7840_port->shadowMCR = mcr;
1743 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1745 dbg("setting MODEM_CONTROL_REGISTER Failed");
1752 /*****************************************************************************
1753 * mos7840_calc_baud_rate_divisor
1754 * this function calculates the proper baud rate divisor for the specified
1756 *****************************************************************************/
1757 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
1761 dbg("%s - %d", __func__, baudRate);
1763 if (baudRate <= 115200) {
1764 *divisor = 115200 / baudRate;
1767 if ((baudRate > 115200) && (baudRate <= 230400)) {
1768 *divisor = 230400 / baudRate;
1769 *clk_sel_val = 0x10;
1770 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1771 *divisor = 403200 / baudRate;
1772 *clk_sel_val = 0x20;
1773 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1774 *divisor = 460800 / baudRate;
1775 *clk_sel_val = 0x30;
1776 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1777 *divisor = 806400 / baudRate;
1778 *clk_sel_val = 0x40;
1779 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1780 *divisor = 921600 / baudRate;
1781 *clk_sel_val = 0x50;
1782 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1783 *divisor = 1572864 / baudRate;
1784 *clk_sel_val = 0x60;
1785 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1786 *divisor = 3145728 / baudRate;
1787 *clk_sel_val = 0x70;
1793 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1794 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1795 *divisor = mos7840_divisor_table[i].Divisor;
1800 /* After trying for all the standard baud rates *
1801 * Try calculating the divisor for this baud rate */
1803 if (baudrate > 75 && baudrate < 230400) {
1804 /* get the divisor */
1805 custom = (__u16) (230400L / baudrate);
1807 /* Check for round off */
1808 round1 = (__u16) (2304000L / baudrate);
1809 round = (__u16) (round1 - (custom * 10));
1814 dbg(" Baud %d = %d", baudrate, custom);
1818 dbg("%s", " Baud calculation Failed...");
1823 /*****************************************************************************
1824 * mos7840_send_cmd_write_baud_rate
1825 * this function sends the proper command to change the baud rate of the
1827 *****************************************************************************/
1829 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1835 unsigned char number;
1837 struct usb_serial_port *port;
1839 if (mos7840_port == NULL)
1842 port = (struct usb_serial_port *)mos7840_port->port;
1843 if (mos7840_port_paranoia_check(port, __func__)) {
1844 dbg("%s", "Invalid port");
1848 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
1849 dbg("%s", "Invalid Serial");
1853 dbg("%s", "Entering ..........");
1855 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1857 dbg("%s - port = %d, baud = %d", __func__,
1858 mos7840_port->port->number, baudRate);
1859 /* reset clk_uart_sel in spregOffset */
1860 if (baudRate > 115200) {
1861 #ifdef HW_flow_control
1862 /* NOTE: need to see the pther register to modify */
1863 /* setting h/w flow control bit to 1 */
1865 mos7840_port->shadowMCR = Data;
1866 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1869 dbg("Writing spreg failed in set_serial_baud");
1875 #ifdef HW_flow_control
1876 /* setting h/w flow control bit to 0 */
1878 mos7840_port->shadowMCR = Data;
1879 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1882 dbg("Writing spreg failed in set_serial_baud");
1889 if (1) { /* baudRate <= 115200) */
1892 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor,
1894 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1897 dbg("reading spreg failed in set_serial_baud");
1900 Data = (Data & 0x8f) | clk_sel_val;
1901 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1904 dbg("Writing spreg failed in set_serial_baud");
1907 /* Calculate the Divisor */
1910 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1913 /* Enable access to divisor latch */
1914 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1915 mos7840_port->shadowLCR = Data;
1916 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1918 /* Write the divisor */
1919 Data = (unsigned char)(divisor & 0xff);
1920 dbg("set_serial_baud Value to write DLL is %x", Data);
1921 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1923 Data = (unsigned char)((divisor & 0xff00) >> 8);
1924 dbg("set_serial_baud Value to write DLM is %x", Data);
1925 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1927 /* Disable access to divisor latch */
1928 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1929 mos7840_port->shadowLCR = Data;
1930 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1936 /*****************************************************************************
1937 * mos7840_change_port_settings
1938 * This routine is called to set the UART on the device to match
1939 * the specified new settings.
1940 *****************************************************************************/
1942 static void mos7840_change_port_settings(struct tty_struct *tty,
1943 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1953 struct usb_serial_port *port;
1954 struct usb_serial *serial;
1956 if (mos7840_port == NULL)
1959 port = (struct usb_serial_port *)mos7840_port->port;
1961 if (mos7840_port_paranoia_check(port, __func__)) {
1962 dbg("%s", "Invalid port");
1966 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
1967 dbg("%s", "Invalid Serial");
1971 serial = port->serial;
1973 dbg("%s - port %d", __func__, mos7840_port->port->number);
1975 if (!mos7840_port->open) {
1976 dbg("%s - port not opened", __func__);
1980 dbg("%s", "Entering ..........");
1984 lParity = LCR_PAR_NONE;
1986 cflag = tty->termios->c_cflag;
1987 iflag = tty->termios->c_iflag;
1989 /* Change the number of bits */
1990 switch (cflag & CSIZE) {
2009 /* Change the Parity bit */
2010 if (cflag & PARENB) {
2011 if (cflag & PARODD) {
2012 lParity = LCR_PAR_ODD;
2013 dbg("%s - parity = odd", __func__);
2015 lParity = LCR_PAR_EVEN;
2016 dbg("%s - parity = even", __func__);
2020 dbg("%s - parity = none", __func__);
2024 lParity = lParity | 0x20;
2026 /* Change the Stop bit */
2027 if (cflag & CSTOPB) {
2029 dbg("%s - stop bits = 2", __func__);
2032 dbg("%s - stop bits = 1", __func__);
2035 /* Update the LCR with the correct value */
2036 mos7840_port->shadowLCR &=
2037 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2038 mos7840_port->shadowLCR |= (lData | lParity | lStop);
2040 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x",
2041 mos7840_port->shadowLCR);
2042 /* Disable Interrupts */
2044 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2047 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2050 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2052 /* Send the updated LCR value to the mos7840 */
2053 Data = mos7840_port->shadowLCR;
2055 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2058 mos7840_port->shadowMCR = Data;
2059 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2061 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2063 /* set up the MCR register and send it to the mos7840 */
2065 mos7840_port->shadowMCR = MCR_MASTER_IE;
2067 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2069 if (cflag & CRTSCTS)
2070 mos7840_port->shadowMCR |= (MCR_XON_ANY);
2072 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
2074 Data = mos7840_port->shadowMCR;
2075 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2077 /* Determine divisor based on baud rate */
2078 baud = tty_get_baud_rate(tty);
2081 /* pick a default, any default... */
2082 dbg("%s", "Picked default baud...");
2086 dbg("%s - baud rate = %d", __func__, baud);
2087 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2089 /* Enable Interrupts */
2091 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2093 if (mos7840_port->read_urb_busy == false) {
2094 mos7840_port->read_urb->dev = serial->dev;
2095 mos7840_port->read_urb_busy = true;
2096 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2098 dbg("usb_submit_urb(read bulk) failed, status = %d",
2100 mos7840_port->read_urb_busy = false;
2103 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x",
2104 mos7840_port->shadowLCR);
2107 /*****************************************************************************
2108 * mos7840_set_termios
2109 * this function is called by the tty driver when it wants to change
2110 * the termios structure
2111 *****************************************************************************/
2113 static void mos7840_set_termios(struct tty_struct *tty,
2114 struct usb_serial_port *port,
2115 struct ktermios *old_termios)
2119 struct usb_serial *serial;
2120 struct moschip_port *mos7840_port;
2121 dbg("mos7840_set_termios: START");
2122 if (mos7840_port_paranoia_check(port, __func__)) {
2123 dbg("%s", "Invalid port");
2127 serial = port->serial;
2129 if (mos7840_serial_paranoia_check(serial, __func__)) {
2130 dbg("%s", "Invalid Serial");
2134 mos7840_port = mos7840_get_port_private(port);
2136 if (mos7840_port == NULL)
2139 if (!mos7840_port->open) {
2140 dbg("%s - port not opened", __func__);
2144 dbg("%s", "setting termios - ");
2146 cflag = tty->termios->c_cflag;
2148 dbg("%s - clfag %08x iflag %08x", __func__,
2149 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
2150 dbg("%s - old clfag %08x old iflag %08x", __func__,
2151 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2152 dbg("%s - port %d", __func__, port->number);
2154 /* change the port settings to the new ones specified */
2156 mos7840_change_port_settings(tty, mos7840_port, old_termios);
2158 if (!mos7840_port->read_urb) {
2159 dbg("%s", "URB KILLED !!!!!");
2163 if (mos7840_port->read_urb_busy == false) {
2164 mos7840_port->read_urb->dev = serial->dev;
2165 mos7840_port->read_urb_busy = true;
2166 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2168 dbg("usb_submit_urb(read bulk) failed, status = %d",
2170 mos7840_port->read_urb_busy = false;
2175 /*****************************************************************************
2176 * mos7840_get_lsr_info - get line status register info
2178 * Purpose: Let user call ioctl() to get info when the UART physically
2179 * is emptied. On bus types like RS485, the transmitter must
2180 * release the bus after transmitting. This must be done when
2181 * the transmit shift register is empty, not be done when the
2182 * transmit holding register is empty. This functionality
2183 * allows an RS485 driver to be written in user space.
2184 *****************************************************************************/
2186 static int mos7840_get_lsr_info(struct tty_struct *tty,
2187 unsigned int __user *value)
2190 unsigned int result = 0;
2192 count = mos7840_chars_in_buffer(tty);
2194 dbg("%s -- Empty", __func__);
2195 result = TIOCSER_TEMT;
2198 if (copy_to_user(value, &result, sizeof(int)))
2203 /*****************************************************************************
2204 * mos7840_get_serial_info
2205 * function to get information about serial port
2206 *****************************************************************************/
2208 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2209 struct serial_struct __user *retinfo)
2211 struct serial_struct tmp;
2213 if (mos7840_port == NULL)
2219 memset(&tmp, 0, sizeof(tmp));
2221 tmp.type = PORT_16550A;
2222 tmp.line = mos7840_port->port->serial->minor;
2223 tmp.port = mos7840_port->port->number;
2225 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2226 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2227 tmp.baud_base = 9600;
2228 tmp.close_delay = 5 * HZ;
2229 tmp.closing_wait = 30 * HZ;
2231 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2236 static int mos7840_get_icount(struct tty_struct *tty,
2237 struct serial_icounter_struct *icount)
2239 struct usb_serial_port *port = tty->driver_data;
2240 struct moschip_port *mos7840_port;
2241 struct async_icount cnow;
2243 mos7840_port = mos7840_get_port_private(port);
2244 cnow = mos7840_port->icount;
2247 icount->cts = cnow.cts;
2248 icount->dsr = cnow.dsr;
2249 icount->rng = cnow.rng;
2250 icount->dcd = cnow.dcd;
2251 icount->rx = cnow.rx;
2252 icount->tx = cnow.tx;
2253 icount->frame = cnow.frame;
2254 icount->overrun = cnow.overrun;
2255 icount->parity = cnow.parity;
2256 icount->brk = cnow.brk;
2257 icount->buf_overrun = cnow.buf_overrun;
2259 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
2260 port->number, icount->rx, icount->tx);
2264 /*****************************************************************************
2266 * this function handles any ioctl calls to the driver
2267 *****************************************************************************/
2269 static int mos7840_ioctl(struct tty_struct *tty,
2270 unsigned int cmd, unsigned long arg)
2272 struct usb_serial_port *port = tty->driver_data;
2273 void __user *argp = (void __user *)arg;
2274 struct moschip_port *mos7840_port;
2276 struct async_icount cnow;
2277 struct async_icount cprev;
2279 if (mos7840_port_paranoia_check(port, __func__)) {
2280 dbg("%s", "Invalid port");
2284 mos7840_port = mos7840_get_port_private(port);
2286 if (mos7840_port == NULL)
2289 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
2292 /* return number of bytes available */
2295 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
2296 return mos7840_get_lsr_info(tty, argp);
2299 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
2300 return mos7840_get_serial_info(mos7840_port, argp);
2303 dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
2307 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
2308 cprev = mos7840_port->icount;
2310 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2311 mos7840_port->delta_msr_cond = 0;
2312 wait_event_interruptible(port->delta_msr_wait,
2313 (port->serial->disconnected ||
2315 delta_msr_cond == 1));
2317 /* see if a signal did it */
2318 if (signal_pending(current))
2319 return -ERESTARTSYS;
2321 if (port->serial->disconnected)
2324 cnow = mos7840_port->icount;
2326 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2327 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2328 return -EIO; /* no change => error */
2329 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2330 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2331 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2332 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2343 return -ENOIOCTLCMD;
2346 static int mos7840_calc_num_ports(struct usb_serial *serial)
2350 int mos7840_num_ports;
2352 ret = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2353 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &Data,
2354 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2356 if ((Data & 0x01) == 0) {
2357 mos7840_num_ports = 2;
2358 serial->num_bulk_in = 2;
2359 serial->num_bulk_out = 2;
2360 serial->num_ports = 2;
2362 mos7840_num_ports = 4;
2363 serial->num_bulk_in = 4;
2364 serial->num_bulk_out = 4;
2365 serial->num_ports = 4;
2368 return mos7840_num_ports;
2371 /****************************************************************************
2373 ****************************************************************************/
2375 static int mos7840_startup(struct usb_serial *serial)
2377 struct moschip_port *mos7840_port;
2378 struct usb_device *dev;
2382 dbg("%s", "mos7840_startup :Entering..........");
2385 dbg("%s", "Invalid Handler");
2391 dbg("%s", "Entering...");
2392 dbg ("mos7840_startup: serial = %p", serial);
2394 /* we set up the pointers to the endpoints in the mos7840_open *
2395 * function, as the structures aren't created yet. */
2397 /* set up port private structures */
2398 for (i = 0; i < serial->num_ports; ++i) {
2399 dbg ("mos7840_startup: configuring port %d............", i);
2400 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2401 if (mos7840_port == NULL) {
2402 dev_err(&dev->dev, "%s - Out of memory\n", __func__);
2404 i--; /* don't follow NULL pointer cleaning up */
2408 /* Initialize all port interrupt end point to port 0 int
2409 * endpoint. Our device has only one interrupt end point
2410 * common to all port */
2412 mos7840_port->port = serial->port[i];
2413 mos7840_set_port_private(serial->port[i], mos7840_port);
2414 spin_lock_init(&mos7840_port->pool_lock);
2416 /* minor is not initialised until later by
2417 * usb-serial.c:get_free_serial() and cannot therefore be used
2418 * to index device instances */
2419 mos7840_port->port_num = i + 1;
2420 dbg ("serial->port[i]->number = %d", serial->port[i]->number);
2421 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor);
2422 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num);
2423 dbg ("serial->minor = %d", serial->minor);
2425 if (mos7840_port->port_num == 1) {
2426 mos7840_port->SpRegOffset = 0x0;
2427 mos7840_port->ControlRegOffset = 0x1;
2428 mos7840_port->DcrRegOffset = 0x4;
2429 } else if ((mos7840_port->port_num == 2)
2430 && (serial->num_ports == 4)) {
2431 mos7840_port->SpRegOffset = 0x8;
2432 mos7840_port->ControlRegOffset = 0x9;
2433 mos7840_port->DcrRegOffset = 0x16;
2434 } else if ((mos7840_port->port_num == 2)
2435 && (serial->num_ports == 2)) {
2436 mos7840_port->SpRegOffset = 0xa;
2437 mos7840_port->ControlRegOffset = 0xb;
2438 mos7840_port->DcrRegOffset = 0x19;
2439 } else if ((mos7840_port->port_num == 3)
2440 && (serial->num_ports == 4)) {
2441 mos7840_port->SpRegOffset = 0xa;
2442 mos7840_port->ControlRegOffset = 0xb;
2443 mos7840_port->DcrRegOffset = 0x19;
2444 } else if ((mos7840_port->port_num == 4)
2445 && (serial->num_ports == 4)) {
2446 mos7840_port->SpRegOffset = 0xc;
2447 mos7840_port->ControlRegOffset = 0xd;
2448 mos7840_port->DcrRegOffset = 0x1c;
2450 mos7840_dump_serial_port(mos7840_port);
2451 mos7840_set_port_private(serial->port[i], mos7840_port);
2453 /* enable rx_disable bit in control register */
2454 status = mos7840_get_reg_sync(serial->port[i],
2455 mos7840_port->ControlRegOffset, &Data);
2457 dbg("Reading ControlReg failed status-0x%x", status);
2460 dbg("ControlReg Reading success val is %x, status%d",
2462 Data |= 0x08; /* setting driver done bit */
2463 Data |= 0x04; /* sp1_bit to have cts change reflect in
2466 /* Data |= 0x20; //rx_disable bit */
2467 status = mos7840_set_reg_sync(serial->port[i],
2468 mos7840_port->ControlRegOffset, Data);
2470 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status);
2473 dbg("ControlReg Writing success(rx_disable) status%d",
2476 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2479 status = mos7840_set_reg_sync(serial->port[i],
2480 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2482 dbg("Writing DCR0 failed status-0x%x", status);
2485 dbg("DCR0 Writing success status%d", status);
2488 status = mos7840_set_reg_sync(serial->port[i],
2489 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2491 dbg("Writing DCR1 failed status-0x%x", status);
2494 dbg("DCR1 Writing success status%d", status);
2497 status = mos7840_set_reg_sync(serial->port[i],
2498 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2500 dbg("Writing DCR2 failed status-0x%x", status);
2503 dbg("DCR2 Writing success status%d", status);
2505 /* write values in clkstart0x0 and clkmulti 0x20 */
2507 status = mos7840_set_reg_sync(serial->port[i],
2508 CLK_START_VALUE_REGISTER, Data);
2510 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status);
2513 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status);
2516 status = mos7840_set_reg_sync(serial->port[i],
2517 CLK_MULTI_REGISTER, Data);
2519 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x",
2523 dbg("CLK_MULTI_REGISTER Writing success status%d",
2526 /* write value 0x0 to scratchpad register */
2528 status = mos7840_set_uart_reg(serial->port[i],
2529 SCRATCH_PAD_REGISTER, Data);
2531 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x",
2535 dbg("SCRATCH_PAD_REGISTER Writing success status%d",
2538 /* Zero Length flag register */
2539 if ((mos7840_port->port_num != 1)
2540 && (serial->num_ports == 2)) {
2543 status = mos7840_set_reg_sync(serial->port[i],
2545 ((__u16)mos7840_port->port_num)), Data);
2546 dbg("ZLIP offset %x",
2548 ((__u16) mos7840_port->port_num)));
2550 dbg("Writing ZLP_REG%d failed status-0x%x",
2554 dbg("ZLP_REG%d Writing success status%d",
2558 status = mos7840_set_reg_sync(serial->port[i],
2560 ((__u16)mos7840_port->port_num) - 0x1), Data);
2561 dbg("ZLIP offset %x",
2563 ((__u16) mos7840_port->port_num) - 0x1));
2565 dbg("Writing ZLP_REG%d failed status-0x%x",
2569 dbg("ZLP_REG%d Writing success status%d",
2573 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2574 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2575 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2577 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2578 !mos7840_port->dr) {
2583 dbg ("mos7840_startup: all ports configured...........");
2585 /* Zero Length flag enable */
2587 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2589 dbg("Writing ZLP_REG5 failed status-0x%x", status);
2592 dbg("ZLP_REG5 Writing success status%d", status);
2594 /* setting configuration feature to one */
2595 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2596 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
2599 for (/* nothing */; i >= 0; i--) {
2600 mos7840_port = mos7840_get_port_private(serial->port[i]);
2602 kfree(mos7840_port->dr);
2603 kfree(mos7840_port->ctrl_buf);
2604 usb_free_urb(mos7840_port->control_urb);
2605 kfree(mos7840_port);
2610 /****************************************************************************
2611 * mos7840_disconnect
2612 * This function is called whenever the device is removed from the usb bus.
2613 ****************************************************************************/
2615 static void mos7840_disconnect(struct usb_serial *serial)
2618 struct moschip_port *mos7840_port;
2619 dbg("%s", " disconnect :entering..........");
2622 dbg("%s", "Invalid Handler");
2626 /* check for the ports to be closed,close the ports and disconnect */
2628 /* free private structure allocated for serial port *
2629 * stop reads and writes on all ports */
2631 for (i = 0; i < serial->num_ports; ++i) {
2632 mos7840_port = mos7840_get_port_private(serial->port[i]);
2633 dbg ("mos7840_port %d = %p", i, mos7840_port);
2635 usb_kill_urb(mos7840_port->control_urb);
2639 dbg("%s", "Thank u :: ");
2643 /****************************************************************************
2645 * This function is called when the usb_serial structure is freed.
2646 ****************************************************************************/
2648 static void mos7840_release(struct usb_serial *serial)
2651 struct moschip_port *mos7840_port;
2652 dbg("%s", " release :entering..........");
2655 dbg("%s", "Invalid Handler");
2659 /* check for the ports to be closed,close the ports and disconnect */
2661 /* free private structure allocated for serial port *
2662 * stop reads and writes on all ports */
2664 for (i = 0; i < serial->num_ports; ++i) {
2665 mos7840_port = mos7840_get_port_private(serial->port[i]);
2666 dbg("mos7840_port %d = %p", i, mos7840_port);
2668 usb_free_urb(mos7840_port->control_urb);
2669 kfree(mos7840_port->ctrl_buf);
2670 kfree(mos7840_port->dr);
2671 kfree(mos7840_port);
2675 dbg("%s", "Thank u :: ");
2679 static struct usb_driver io_driver = {
2681 .probe = usb_serial_probe,
2682 .disconnect = usb_serial_disconnect,
2683 .id_table = moschip_id_table_combined,
2687 static struct usb_serial_driver moschip7840_4port_device = {
2689 .owner = THIS_MODULE,
2692 .description = DRIVER_DESC,
2693 .usb_driver = &io_driver,
2694 .id_table = moschip_port_id_table,
2696 .open = mos7840_open,
2697 .close = mos7840_close,
2698 .write = mos7840_write,
2699 .write_room = mos7840_write_room,
2700 .chars_in_buffer = mos7840_chars_in_buffer,
2701 .throttle = mos7840_throttle,
2702 .unthrottle = mos7840_unthrottle,
2703 .calc_num_ports = mos7840_calc_num_ports,
2704 #ifdef MCSSerialProbe
2705 .probe = mos7840_serial_probe,
2707 .ioctl = mos7840_ioctl,
2708 .set_termios = mos7840_set_termios,
2709 .break_ctl = mos7840_break,
2710 .tiocmget = mos7840_tiocmget,
2711 .tiocmset = mos7840_tiocmset,
2712 .get_icount = mos7840_get_icount,
2713 .attach = mos7840_startup,
2714 .disconnect = mos7840_disconnect,
2715 .release = mos7840_release,
2716 .read_bulk_callback = mos7840_bulk_in_callback,
2717 .read_int_callback = mos7840_interrupt_callback,
2720 /****************************************************************************
2722 * This is called by the module subsystem, or on startup to initialize us
2723 ****************************************************************************/
2724 static int __init moschip7840_init(void)
2728 dbg("%s", " mos7840_init :entering..........");
2730 /* Register with the usb serial */
2731 retval = usb_serial_register(&moschip7840_4port_device);
2734 goto failed_port_device_register;
2736 dbg("%s", "Entering...");
2737 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
2740 /* Register with the usb */
2741 retval = usb_register(&io_driver);
2743 dbg("%s", "Leaving...");
2746 usb_serial_deregister(&moschip7840_4port_device);
2747 failed_port_device_register:
2751 /****************************************************************************
2753 * Called when the driver is about to be unloaded.
2754 ****************************************************************************/
2755 static void __exit moschip7840_exit(void)
2758 dbg("%s", " mos7840_exit :entering..........");
2760 usb_deregister(&io_driver);
2762 usb_serial_deregister(&moschip7840_4port_device);
2764 dbg("%s", "Entering...");
2767 module_init(moschip7840_init);
2768 module_exit(moschip7840_exit);
2770 /* Module information */
2771 MODULE_DESCRIPTION(DRIVER_DESC);
2772 MODULE_LICENSE("GPL");
2774 module_param(debug, bool, S_IRUGO | S_IWUSR);
2775 MODULE_PARM_DESC(debug, "Debug enabled or not");