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 MOS_WDR_TIMEOUT 5000 /* default urb timeout */
87 #define MOS_PORT1 0x0200
88 #define MOS_PORT2 0x0300
89 #define MOS_VENREG 0x0000
90 #define MOS_MAX_PORT 0x02
91 #define MOS_WRITE 0x0E
95 #define MCS_RD_RTYPE 0xC0
96 #define MCS_WR_RTYPE 0x40
97 #define MCS_RDREQ 0x0D
98 #define MCS_WRREQ 0x0E
99 #define MCS_CTRL_TIMEOUT 500
100 #define VENDOR_READ_LENGTH (0x01)
102 #define MAX_NAME_LEN 64
104 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
105 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
107 /* For higher baud Rates use TIOCEXBAUD */
108 #define TIOCEXBAUD 0x5462
110 /* vendor id and device id defines */
112 /* The native mos7840/7820 component */
113 #define USB_VENDOR_ID_MOSCHIP 0x9710
114 #define MOSCHIP_DEVICE_ID_7840 0x7840
115 #define MOSCHIP_DEVICE_ID_7820 0x7820
116 #define MOSCHIP_DEVICE_ID_7810 0x7810
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 id_table.
121 #define USB_VENDOR_ID_BANDB 0x0856
122 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
123 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00
124 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
125 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01
126 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29
127 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30
128 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31
129 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32
130 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
131 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02
132 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
133 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
134 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
136 /* This driver also supports
137 * ATEN UC2324 device using Moschip MCS7840
138 * ATEN UC2322 device using Moschip MCS7820
140 #define USB_VENDOR_ID_ATENINTL 0x0557
141 #define ATENINTL_DEVICE_ID_UC2324 0x2011
142 #define ATENINTL_DEVICE_ID_UC2322 0x7820
144 /* Interrupt Routine Defines */
146 #define SERIAL_IIR_RLS 0x06
147 #define SERIAL_IIR_MS 0x00
150 * Emulation of the bit mask on the LINE STATUS REGISTER.
152 #define SERIAL_LSR_DR 0x0001
153 #define SERIAL_LSR_OE 0x0002
154 #define SERIAL_LSR_PE 0x0004
155 #define SERIAL_LSR_FE 0x0008
156 #define SERIAL_LSR_BI 0x0010
158 #define MOS_MSR_DELTA_CTS 0x10
159 #define MOS_MSR_DELTA_DSR 0x20
160 #define MOS_MSR_DELTA_RI 0x40
161 #define MOS_MSR_DELTA_CD 0x80
163 /* Serial Port register Address */
164 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
165 #define FIFO_CONTROL_REGISTER ((__u16)(0x02))
166 #define LINE_CONTROL_REGISTER ((__u16)(0x03))
167 #define MODEM_CONTROL_REGISTER ((__u16)(0x04))
168 #define LINE_STATUS_REGISTER ((__u16)(0x05))
169 #define MODEM_STATUS_REGISTER ((__u16)(0x06))
170 #define SCRATCH_PAD_REGISTER ((__u16)(0x07))
171 #define DIVISOR_LATCH_LSB ((__u16)(0x00))
172 #define DIVISOR_LATCH_MSB ((__u16)(0x01))
174 #define CLK_MULTI_REGISTER ((__u16)(0x02))
175 #define CLK_START_VALUE_REGISTER ((__u16)(0x03))
176 #define GPIO_REGISTER ((__u16)(0x07))
178 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
181 * URB POOL related defines
183 #define NUM_URBS 16 /* URB Count */
184 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
186 /* LED on/off milliseconds*/
187 #define LED_ON_MS 500
188 #define LED_OFF_MS 500
190 static int device_type;
192 static const struct usb_device_id 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_MOSCHIP, MOSCHIP_DEVICE_ID_7810)},
196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
205 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
206 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
207 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
208 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
209 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
210 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
211 {} /* terminating entry */
213 MODULE_DEVICE_TABLE(usb, id_table);
215 /* This structure holds all of the local port information */
217 struct moschip_port {
218 int port_num; /*Actual port number in the device(1,2,etc) */
219 struct urb *write_urb; /* write URB for this port */
220 struct urb *read_urb; /* read URB for this port */
221 __u8 shadowLCR; /* last LCR value received */
222 __u8 shadowMCR; /* last MCR value received */
225 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
226 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
228 struct async_icount icount;
229 struct usb_serial_port *port; /* loop back to the owner of this object */
233 __u8 ControlRegOffset;
235 /* for processing control URBS in interrupt context */
236 struct urb *control_urb;
237 struct usb_ctrlrequest *dr;
241 spinlock_t pool_lock;
242 struct urb *write_urb_pool[NUM_URBS];
246 /* For device(s) with LED indicator */
249 struct timer_list led_timer1; /* Timer for LED on */
250 struct timer_list led_timer2; /* Timer for LED off */
254 * mos7840_set_reg_sync
255 * To set the Control register by calling usb_fill_control_urb function
256 * by passing usb_sndctrlpipe function as parameter.
259 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
262 struct usb_device *dev = port->serial->dev;
264 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
266 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
267 MCS_WR_RTYPE, val, reg, NULL, 0,
272 * mos7840_get_reg_sync
273 * To set the Uart register by calling usb_fill_control_urb function by
274 * passing usb_rcvctrlpipe function as parameter.
277 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
280 struct usb_device *dev = port->serial->dev;
284 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
288 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
289 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
292 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val);
299 * mos7840_set_uart_reg
300 * To set the Uart register by calling usb_fill_control_urb function by
301 * passing usb_sndctrlpipe function as parameter.
304 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
308 struct usb_device *dev = port->serial->dev;
310 /* For the UART control registers, the application number need
312 if (port->serial->num_ports == 4) {
313 val |= (((__u16) port->number -
314 (__u16) (port->serial->minor)) + 1) << 8;
316 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
317 val |= (((__u16) port->number -
318 (__u16) (port->serial->minor)) + 1) << 8;
320 val |= (((__u16) port->number -
321 (__u16) (port->serial->minor)) + 2) << 8;
324 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val);
325 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
326 MCS_WR_RTYPE, val, reg, NULL, 0,
332 * mos7840_get_uart_reg
333 * To set the Control register by calling usb_fill_control_urb function
334 * by passing usb_rcvctrlpipe function as parameter.
336 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
339 struct usb_device *dev = port->serial->dev;
344 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
348 /* Wval is same as application number */
349 if (port->serial->num_ports == 4) {
351 (((__u16) port->number - (__u16) (port->serial->minor)) +
354 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
355 Wval = (((__u16) port->number -
356 (__u16) (port->serial->minor)) + 1) << 8;
358 Wval = (((__u16) port->number -
359 (__u16) (port->serial->minor)) + 2) << 8;
362 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval);
363 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
364 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
372 static void mos7840_dump_serial_port(struct usb_serial_port *port,
373 struct moschip_port *mos7840_port)
376 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
377 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset);
378 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset);
382 /************************************************************************/
383 /************************************************************************/
384 /* I N T E R F A C E F U N C T I O N S */
385 /* I N T E R F A C E F U N C T I O N S */
386 /************************************************************************/
387 /************************************************************************/
389 static inline void mos7840_set_port_private(struct usb_serial_port *port,
390 struct moschip_port *data)
392 usb_set_serial_port_data(port, (void *)data);
395 static inline struct moschip_port *mos7840_get_port_private(struct
399 return (struct moschip_port *)usb_get_serial_port_data(port);
402 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
404 struct moschip_port *mos7840_port;
405 struct async_icount *icount;
407 icount = &mos7840_port->icount;
409 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
411 icount = &mos7840_port->icount;
413 /* update input line counters */
414 if (new_msr & MOS_MSR_DELTA_CTS) {
418 if (new_msr & MOS_MSR_DELTA_DSR) {
422 if (new_msr & MOS_MSR_DELTA_CD) {
426 if (new_msr & MOS_MSR_DELTA_RI) {
433 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
435 struct async_icount *icount;
437 if (new_lsr & SERIAL_LSR_BI) {
439 * Parity and Framing errors only count if they
440 * occur exclusive of a break being
443 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
446 /* update input line counters */
447 icount = &port->icount;
448 if (new_lsr & SERIAL_LSR_BI) {
452 if (new_lsr & SERIAL_LSR_OE) {
456 if (new_lsr & SERIAL_LSR_PE) {
460 if (new_lsr & SERIAL_LSR_FE) {
466 /************************************************************************/
467 /************************************************************************/
468 /* U S B C A L L B A C K F U N C T I O N S */
469 /* U S B C A L L B A C K F U N C T I O N S */
470 /************************************************************************/
471 /************************************************************************/
473 static void mos7840_control_callback(struct urb *urb)
476 struct moschip_port *mos7840_port;
477 struct device *dev = &urb->dev->dev;
479 int status = urb->status;
481 mos7840_port = urb->context;
490 /* this urb is terminated, clean up */
491 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
494 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
498 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length);
499 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__,
500 mos7840_port->MsrLsr, mos7840_port->port_num);
501 data = urb->transfer_buffer;
502 regval = (__u8) data[0];
503 dev_dbg(dev, "%s data is %x\n", __func__, regval);
504 if (mos7840_port->MsrLsr == 0)
505 mos7840_handle_new_msr(mos7840_port, regval);
506 else if (mos7840_port->MsrLsr == 1)
507 mos7840_handle_new_lsr(mos7840_port, regval);
510 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
513 struct usb_device *dev = mcs->port->serial->dev;
514 struct usb_ctrlrequest *dr = mcs->dr;
515 unsigned char *buffer = mcs->ctrl_buf;
518 dr->bRequestType = MCS_RD_RTYPE;
519 dr->bRequest = MCS_RDREQ;
520 dr->wValue = cpu_to_le16(Wval); /* 0 */
521 dr->wIndex = cpu_to_le16(reg);
522 dr->wLength = cpu_to_le16(2);
524 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
525 (unsigned char *)dr, buffer, 2,
526 mos7840_control_callback, mcs);
527 mcs->control_urb->transfer_buffer_length = 2;
528 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
532 static void mos7840_set_led_callback(struct urb *urb)
534 switch (urb->status) {
541 /* This urb is terminated, clean up */
542 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d",
543 __func__, urb->status);
546 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d",
547 __func__, urb->status);
551 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
554 struct usb_device *dev = mcs->port->serial->dev;
555 struct usb_ctrlrequest *dr = mcs->dr;
557 dr->bRequestType = MCS_WR_RTYPE;
558 dr->bRequest = MCS_WRREQ;
559 dr->wValue = cpu_to_le16(wval);
560 dr->wIndex = cpu_to_le16(reg);
561 dr->wLength = cpu_to_le16(0);
563 usb_fill_control_urb(mcs->control_urb, dev, usb_sndctrlpipe(dev, 0),
564 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
566 usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
569 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
572 struct usb_device *dev = port->serial->dev;
574 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
575 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
578 static void mos7840_led_off(unsigned long arg)
580 struct moschip_port *mcs = (struct moschip_port *) arg;
583 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
584 mod_timer(&mcs->led_timer2,
585 jiffies + msecs_to_jiffies(LED_OFF_MS));
588 static void mos7840_led_flag_off(unsigned long arg)
590 struct moschip_port *mcs = (struct moschip_port *) arg;
592 mcs->led_flag = false;
595 /*****************************************************************************
596 * mos7840_interrupt_callback
597 * this is the callback function for when we have received data on the
598 * interrupt endpoint.
599 *****************************************************************************/
601 static void mos7840_interrupt_callback(struct urb *urb)
605 struct moschip_port *mos7840_port;
606 struct usb_serial *serial;
611 __u16 wval, wreg = 0;
612 int status = urb->status;
621 /* this urb is terminated, clean up */
622 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
626 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n",
631 length = urb->actual_length;
632 data = urb->transfer_buffer;
634 serial = urb->context;
636 /* Moschip get 5 bytes
637 * Byte 1 IIR Port 1 (port.number is 0)
638 * Byte 2 IIR Port 2 (port.number is 1)
639 * Byte 3 IIR Port 3 (port.number is 2)
640 * Byte 4 IIR Port 4 (port.number is 3)
641 * Byte 5 FIFO status for both */
643 if (length && length > 5) {
644 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n");
648 sp[0] = (__u8) data[0];
649 sp[1] = (__u8) data[1];
650 sp[2] = (__u8) data[2];
651 sp[3] = (__u8) data[3];
654 for (i = 0; i < serial->num_ports; i++) {
655 mos7840_port = mos7840_get_port_private(serial->port[i]);
657 (((__u16) serial->port[i]->number -
658 (__u16) (serial->minor)) + 1) << 8;
659 if (mos7840_port->open) {
661 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i);
663 switch (sp[i] & 0x0f) {
665 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i);
666 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n");
667 mos7840_port->MsrLsr = 1;
668 wreg = LINE_STATUS_REGISTER;
671 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i);
672 mos7840_port->MsrLsr = 0;
673 wreg = MODEM_STATUS_REGISTER;
676 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
681 /* the completion handler for the control urb will resubmit */
684 result = usb_submit_urb(urb, GFP_ATOMIC);
686 dev_err(&urb->dev->dev,
687 "%s - Error %d submitting interrupt urb\n",
692 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
693 const char *function)
696 pr_debug("%s - port == NULL\n", function);
700 pr_debug("%s - port->serial == NULL\n", function);
707 /* Inline functions to check the sanity of a pointer that is passed to us */
708 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
709 const char *function)
712 pr_debug("%s - serial == NULL\n", function);
716 pr_debug("%s - serial->type == NULL!\n", function);
723 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
724 const char *function)
726 /* if no port was specified, or it fails a paranoia check */
728 mos7840_port_paranoia_check(port, function) ||
729 mos7840_serial_paranoia_check(port->serial, function)) {
730 /* then say that we don't have a valid usb_serial thing,
731 * which will end up genrating -ENODEV return values */
738 /*****************************************************************************
739 * mos7840_bulk_in_callback
740 * this is the callback function for when we have received data on the
742 *****************************************************************************/
744 static void mos7840_bulk_in_callback(struct urb *urb)
748 struct usb_serial *serial;
749 struct usb_serial_port *port;
750 struct moschip_port *mos7840_port;
751 struct tty_struct *tty;
752 int status = urb->status;
754 mos7840_port = urb->context;
759 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
760 mos7840_port->read_urb_busy = false;
764 port = mos7840_port->port;
765 if (mos7840_port_paranoia_check(port, __func__)) {
766 mos7840_port->read_urb_busy = false;
770 serial = mos7840_get_usb_serial(port, __func__);
772 mos7840_port->read_urb_busy = false;
776 data = urb->transfer_buffer;
777 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
779 if (urb->actual_length) {
780 tty = tty_port_tty_get(&mos7840_port->port->port);
782 tty_insert_flip_string(tty, data, urb->actual_length);
783 tty_flip_buffer_push(tty);
786 mos7840_port->icount.rx += urb->actual_length;
788 dev_dbg(&port->dev, "mos7840_port->icount.rx is %d:\n", mos7840_port->icount.rx);
791 if (!mos7840_port->read_urb) {
792 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n");
793 mos7840_port->read_urb_busy = false;
798 if (mos7840_port->has_led && !mos7840_port->led_flag) {
799 mos7840_port->led_flag = true;
800 mos7840_set_led_async(mos7840_port, 0x0301,
801 MODEM_CONTROL_REGISTER);
802 mod_timer(&mos7840_port->led_timer1,
803 jiffies + msecs_to_jiffies(LED_ON_MS));
806 mos7840_port->read_urb_busy = true;
807 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
810 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
811 mos7840_port->read_urb_busy = false;
815 /*****************************************************************************
816 * mos7840_bulk_out_data_callback
817 * this is the callback function for when we have finished sending
818 * serial data on the bulk out endpoint.
819 *****************************************************************************/
821 static void mos7840_bulk_out_data_callback(struct urb *urb)
823 struct moschip_port *mos7840_port;
824 struct usb_serial_port *port;
825 struct tty_struct *tty;
826 int status = urb->status;
829 mos7840_port = urb->context;
830 port = mos7840_port->port;
831 spin_lock(&mos7840_port->pool_lock);
832 for (i = 0; i < NUM_URBS; i++) {
833 if (urb == mos7840_port->write_urb_pool[i]) {
834 mos7840_port->busy[i] = 0;
838 spin_unlock(&mos7840_port->pool_lock);
841 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);
845 if (mos7840_port_paranoia_check(port, __func__))
848 tty = tty_port_tty_get(&port->port);
849 if (tty && mos7840_port->open)
855 /************************************************************************/
856 /* 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 */
857 /************************************************************************/
858 #ifdef MCSSerialProbe
859 static int mos7840_serial_probe(struct usb_serial *serial,
860 const struct usb_device_id *id)
863 /*need to implement the mode_reg reading and updating\
864 structures usb_serial_ device_type\
865 (i.e num_ports, num_bulkin,bulkout etc) */
866 /* Also we can update the changes attach */
871 /*****************************************************************************
873 * this function is called by the tty driver when a port is opened
874 * If successful, we return 0
875 * Otherwise we return a negative error number.
876 *****************************************************************************/
878 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
882 struct usb_serial *serial;
886 struct moschip_port *mos7840_port;
887 struct moschip_port *port0;
889 if (mos7840_port_paranoia_check(port, __func__))
892 serial = port->serial;
894 if (mos7840_serial_paranoia_check(serial, __func__))
897 mos7840_port = mos7840_get_port_private(port);
898 port0 = mos7840_get_port_private(serial->port[0]);
900 if (mos7840_port == NULL || port0 == NULL)
903 usb_clear_halt(serial->dev, port->write_urb->pipe);
904 usb_clear_halt(serial->dev, port->read_urb->pipe);
907 /* Initialising the write urb pool */
908 for (j = 0; j < NUM_URBS; ++j) {
909 urb = usb_alloc_urb(0, GFP_KERNEL);
910 mos7840_port->write_urb_pool[j] = urb;
913 dev_err(&port->dev, "No more urbs???\n");
917 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
919 if (!urb->transfer_buffer) {
921 mos7840_port->write_urb_pool[j] = NULL;
923 "%s-out of memory for urb buffers.\n",
929 /*****************************************************************************
930 * Initialize MCS7840 -- Write Init values to corresponding Registers
938 * 0x08 : SP1/2 Control Reg
939 *****************************************************************************/
941 /* NEED to check the following Block */
944 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
946 dev_dbg(&port->dev, "Reading Spreg failed\n");
950 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
952 dev_dbg(&port->dev, "writing Spreg failed\n");
957 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
959 dev_dbg(&port->dev, "writing Spreg failed\n");
962 /* End of block to be checked */
965 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
968 dev_dbg(&port->dev, "Reading Controlreg failed\n");
971 Data |= 0x08; /* Driver done bit */
972 Data |= 0x20; /* rx_disable */
973 status = mos7840_set_reg_sync(port,
974 mos7840_port->ControlRegOffset, Data);
976 dev_dbg(&port->dev, "writing Controlreg failed\n");
979 /* do register settings here */
980 /* Set all regs to the device default values. */
981 /***********************************
982 * First Disable all interrupts.
983 ***********************************/
985 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
987 dev_dbg(&port->dev, "disabling interrupts failed\n");
990 /* Set FIFO_CONTROL_REGISTER to the default value */
992 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
994 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
999 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1001 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
1006 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1007 mos7840_port->shadowLCR = Data;
1010 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1011 mos7840_port->shadowMCR = Data;
1014 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1015 mos7840_port->shadowLCR = Data;
1017 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1018 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1021 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1024 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1027 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1029 Data = Data & ~SERIAL_LCR_DLAB;
1030 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1031 mos7840_port->shadowLCR = Data;
1033 /* clearing Bulkin and Bulkout Fifo */
1035 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1038 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1040 Data = Data & ~0x0c;
1041 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1042 /* Finally enable all interrupts */
1044 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1046 /* clearing rx_disable */
1048 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1050 Data = Data & ~0x20;
1051 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1056 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1059 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1062 /* Check to see if we've set up our endpoint info yet *
1063 * (can't set it up in mos7840_startup as the structures *
1064 * were not set up at that time.) */
1065 if (port0->open_ports == 1) {
1066 if (serial->port[0]->interrupt_in_buffer == NULL) {
1067 /* set up interrupt urb */
1068 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1070 usb_rcvintpipe(serial->dev,
1071 serial->port[0]->interrupt_in_endpointAddress),
1072 serial->port[0]->interrupt_in_buffer,
1073 serial->port[0]->interrupt_in_urb->
1074 transfer_buffer_length,
1075 mos7840_interrupt_callback,
1077 serial->port[0]->interrupt_in_urb->interval);
1079 /* start interrupt read for mos7840 *
1080 * will continue as long as mos7840 is connected */
1083 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1086 dev_err(&port->dev, "%s - Error %d submitting "
1087 "interrupt urb\n", __func__, response);
1094 /* see if we've set up our endpoint info yet *
1095 * (can't set it up in mos7840_startup as the *
1096 * structures were not set up at that time.) */
1098 dev_dbg(&port->dev, "port number is %d\n", port->number);
1099 dev_dbg(&port->dev, "serial number is %d\n", port->serial->minor);
1100 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
1101 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
1102 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
1103 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num);
1104 mos7840_port->read_urb = port->read_urb;
1106 /* set up our bulk in urb */
1107 if ((serial->num_ports == 2)
1108 && ((((__u16)port->number -
1109 (__u16)(port->serial->minor)) % 2) != 0)) {
1110 usb_fill_bulk_urb(mos7840_port->read_urb,
1112 usb_rcvbulkpipe(serial->dev,
1113 (port->bulk_in_endpointAddress) + 2),
1114 port->bulk_in_buffer,
1115 mos7840_port->read_urb->transfer_buffer_length,
1116 mos7840_bulk_in_callback, mos7840_port);
1118 usb_fill_bulk_urb(mos7840_port->read_urb,
1120 usb_rcvbulkpipe(serial->dev,
1121 port->bulk_in_endpointAddress),
1122 port->bulk_in_buffer,
1123 mos7840_port->read_urb->transfer_buffer_length,
1124 mos7840_bulk_in_callback, mos7840_port);
1127 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress);
1128 mos7840_port->read_urb_busy = true;
1129 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1131 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1132 __func__, response);
1133 mos7840_port->read_urb_busy = false;
1136 /* initialize our wait queues */
1137 init_waitqueue_head(&mos7840_port->wait_chase);
1138 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1140 /* initialize our icount structure */
1141 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1143 /* initialize our port settings */
1144 /* Must set to enable ints! */
1145 mos7840_port->shadowMCR = MCR_MASTER_IE;
1146 /* send a open port command */
1147 mos7840_port->open = 1;
1148 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1149 mos7840_port->icount.tx = 0;
1150 mos7840_port->icount.rx = 0;
1155 /*****************************************************************************
1156 * mos7840_chars_in_buffer
1157 * this function is called by the tty driver when it wants to know how many
1158 * bytes of data we currently have outstanding in the port (data that has
1159 * been written, but hasn't made it out the port yet)
1160 * If successful, we return the number of bytes left to be written in the
1162 * Otherwise we return zero.
1163 *****************************************************************************/
1165 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1167 struct usb_serial_port *port = tty->driver_data;
1170 unsigned long flags;
1171 struct moschip_port *mos7840_port;
1173 if (mos7840_port_paranoia_check(port, __func__))
1176 mos7840_port = mos7840_get_port_private(port);
1177 if (mos7840_port == NULL)
1180 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1181 for (i = 0; i < NUM_URBS; ++i) {
1182 if (mos7840_port->busy[i]) {
1183 struct urb *urb = mos7840_port->write_urb_pool[i];
1184 chars += urb->transfer_buffer_length;
1187 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1188 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
1193 /*****************************************************************************
1195 * this function is called by the tty driver when a port is closed
1196 *****************************************************************************/
1198 static void mos7840_close(struct usb_serial_port *port)
1200 struct usb_serial *serial;
1201 struct moschip_port *mos7840_port;
1202 struct moschip_port *port0;
1206 if (mos7840_port_paranoia_check(port, __func__))
1209 serial = mos7840_get_usb_serial(port, __func__);
1213 mos7840_port = mos7840_get_port_private(port);
1214 port0 = mos7840_get_port_private(serial->port[0]);
1216 if (mos7840_port == NULL || port0 == NULL)
1219 for (j = 0; j < NUM_URBS; ++j)
1220 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1222 /* Freeing Write URBs */
1223 for (j = 0; j < NUM_URBS; ++j) {
1224 if (mos7840_port->write_urb_pool[j]) {
1225 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1226 kfree(mos7840_port->write_urb_pool[j]->
1229 usb_free_urb(mos7840_port->write_urb_pool[j]);
1233 /* While closing port, shutdown all bulk read, write *
1234 * and interrupt read if they exists */
1236 if (mos7840_port->write_urb) {
1237 dev_dbg(&port->dev, "%s", "Shutdown bulk write\n");
1238 usb_kill_urb(mos7840_port->write_urb);
1240 if (mos7840_port->read_urb) {
1241 dev_dbg(&port->dev, "%s", "Shutdown bulk read\n");
1242 usb_kill_urb(mos7840_port->read_urb);
1243 mos7840_port->read_urb_busy = false;
1245 if ((&mos7840_port->control_urb)) {
1246 dev_dbg(&port->dev, "%s", "Shutdown control read\n");
1247 /*/ usb_kill_urb (mos7840_port->control_urb); */
1250 /* if(mos7840_port->ctrl_buf != NULL) */
1251 /* kfree(mos7840_port->ctrl_buf); */
1252 port0->open_ports--;
1253 dev_dbg(&port->dev, "%s in close%d:in port%d\n", __func__, port0->open_ports, port->number);
1254 if (port0->open_ports == 0) {
1255 if (serial->port[0]->interrupt_in_urb) {
1256 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n");
1257 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1261 if (mos7840_port->write_urb) {
1262 /* if this urb had a transfer buffer already (old tx) free it */
1263 if (mos7840_port->write_urb->transfer_buffer != NULL)
1264 kfree(mos7840_port->write_urb->transfer_buffer);
1265 usb_free_urb(mos7840_port->write_urb);
1269 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1272 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1274 mos7840_port->open = 0;
1277 /************************************************************************
1279 * mos7840_block_until_chase_response
1281 * This function will block the close until one of the following:
1282 * 1. Response to our Chase comes from mos7840
1283 * 2. A timeout of 10 seconds without activity has expired
1284 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1286 ************************************************************************/
1288 static void mos7840_block_until_chase_response(struct tty_struct *tty,
1289 struct moschip_port *mos7840_port)
1291 int timeout = msecs_to_jiffies(1000);
1296 count = mos7840_chars_in_buffer(tty);
1298 /* Check for Buffer status */
1302 /* Block the thread for a while */
1303 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1305 /* No activity.. count down section */
1308 dev_dbg(&mos7840_port->port->dev, "%s - TIMEOUT\n", __func__);
1311 /* Reset timeout value back to seconds */
1318 /*****************************************************************************
1320 * this function sends a break to the port
1321 *****************************************************************************/
1322 static void mos7840_break(struct tty_struct *tty, int break_state)
1324 struct usb_serial_port *port = tty->driver_data;
1326 struct usb_serial *serial;
1327 struct moschip_port *mos7840_port;
1329 if (mos7840_port_paranoia_check(port, __func__))
1332 serial = mos7840_get_usb_serial(port, __func__);
1336 mos7840_port = mos7840_get_port_private(port);
1338 if (mos7840_port == NULL)
1342 /* flush and block until tx is empty */
1343 mos7840_block_until_chase_response(tty, mos7840_port);
1345 if (break_state == -1)
1346 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1348 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1350 /* FIXME: no locking on shadowLCR anywhere in driver */
1351 mos7840_port->shadowLCR = data;
1352 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1353 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1354 mos7840_port->shadowLCR);
1357 /*****************************************************************************
1358 * mos7840_write_room
1359 * this function is called by the tty driver when it wants to know how many
1360 * bytes of data we can accept for a specific port.
1361 * If successful, we return the amount of room that we have for this port
1362 * Otherwise we return a negative error number.
1363 *****************************************************************************/
1365 static int mos7840_write_room(struct tty_struct *tty)
1367 struct usb_serial_port *port = tty->driver_data;
1370 unsigned long flags;
1371 struct moschip_port *mos7840_port;
1373 if (mos7840_port_paranoia_check(port, __func__))
1376 mos7840_port = mos7840_get_port_private(port);
1377 if (mos7840_port == NULL)
1380 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1381 for (i = 0; i < NUM_URBS; ++i) {
1382 if (!mos7840_port->busy[i])
1383 room += URB_TRANSFER_BUFFER_SIZE;
1385 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1387 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1388 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room);
1393 /*****************************************************************************
1395 * this function is called by the tty driver when data should be written to
1397 * If successful, we return the number of bytes written, otherwise we
1398 * return a negative error number.
1399 *****************************************************************************/
1401 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1402 const unsigned char *data, int count)
1408 unsigned long flags;
1410 struct moschip_port *mos7840_port;
1411 struct usb_serial *serial;
1414 const unsigned char *current_position = data;
1415 unsigned char *data1;
1419 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1420 mos7840_port->shadowLCR = Data;
1421 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data);
1422 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1425 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1426 /* mos7840_port->shadowLCR=Data;//Need to add later */
1428 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1429 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1432 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1434 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1435 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data);
1438 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1439 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data);
1441 Data = Data & ~SERIAL_LCR_DLAB;
1442 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1443 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1446 if (mos7840_port_paranoia_check(port, __func__))
1449 serial = port->serial;
1450 if (mos7840_serial_paranoia_check(serial, __func__))
1453 mos7840_port = mos7840_get_port_private(port);
1454 if (mos7840_port == NULL)
1457 /* try to find a free urb in the list */
1460 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1461 for (i = 0; i < NUM_URBS; ++i) {
1462 if (!mos7840_port->busy[i]) {
1463 mos7840_port->busy[i] = 1;
1464 urb = mos7840_port->write_urb_pool[i];
1465 dev_dbg(&port->dev, "URB:%d\n", i);
1469 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1472 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
1476 if (urb->transfer_buffer == NULL) {
1477 urb->transfer_buffer =
1478 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1480 if (urb->transfer_buffer == NULL) {
1481 dev_err_console(port, "%s no more kernel memory...\n",
1486 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1488 memcpy(urb->transfer_buffer, current_position, transfer_size);
1490 /* fill urb with data and submit */
1491 if ((serial->num_ports == 2)
1492 && ((((__u16)port->number -
1493 (__u16)(port->serial->minor)) % 2) != 0)) {
1494 usb_fill_bulk_urb(urb,
1496 usb_sndbulkpipe(serial->dev,
1497 (port->bulk_out_endpointAddress) + 2),
1498 urb->transfer_buffer,
1500 mos7840_bulk_out_data_callback, mos7840_port);
1502 usb_fill_bulk_urb(urb,
1504 usb_sndbulkpipe(serial->dev,
1505 port->bulk_out_endpointAddress),
1506 urb->transfer_buffer,
1508 mos7840_bulk_out_data_callback, mos7840_port);
1511 data1 = urb->transfer_buffer;
1512 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
1515 if (mos7840_port->has_led && !mos7840_port->led_flag) {
1516 mos7840_port->led_flag = true;
1517 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0301);
1518 mod_timer(&mos7840_port->led_timer1,
1519 jiffies + msecs_to_jiffies(LED_ON_MS));
1522 /* send it down the pipe */
1523 status = usb_submit_urb(urb, GFP_ATOMIC);
1526 mos7840_port->busy[i] = 0;
1527 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
1528 "with status = %d\n", __func__, status);
1529 bytes_sent = status;
1532 bytes_sent = transfer_size;
1533 mos7840_port->icount.tx += transfer_size;
1535 dev_dbg(&port->dev, "mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
1541 /*****************************************************************************
1543 * this function is called by the tty driver when it wants to stop the data
1544 * being read from the port.
1545 *****************************************************************************/
1547 static void mos7840_throttle(struct tty_struct *tty)
1549 struct usb_serial_port *port = tty->driver_data;
1550 struct moschip_port *mos7840_port;
1553 if (mos7840_port_paranoia_check(port, __func__))
1556 mos7840_port = mos7840_get_port_private(port);
1558 if (mos7840_port == NULL)
1561 if (!mos7840_port->open) {
1562 dev_dbg(&port->dev, "%s", "port not opened\n");
1566 /* if we are implementing XON/XOFF, send the stop character */
1568 unsigned char stop_char = STOP_CHAR(tty);
1569 status = mos7840_write(tty, port, &stop_char, 1);
1573 /* if we are implementing RTS/CTS, toggle that line */
1574 if (tty->termios.c_cflag & CRTSCTS) {
1575 mos7840_port->shadowMCR &= ~MCR_RTS;
1576 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1577 mos7840_port->shadowMCR);
1583 /*****************************************************************************
1584 * mos7840_unthrottle
1585 * this function is called by the tty driver when it wants to resume
1586 * the data being read from the port (called after mos7840_throttle is
1588 *****************************************************************************/
1589 static void mos7840_unthrottle(struct tty_struct *tty)
1591 struct usb_serial_port *port = tty->driver_data;
1593 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1595 if (mos7840_port_paranoia_check(port, __func__))
1598 if (mos7840_port == NULL)
1601 if (!mos7840_port->open) {
1602 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1606 /* if we are implementing XON/XOFF, send the start character */
1608 unsigned char start_char = START_CHAR(tty);
1609 status = mos7840_write(tty, port, &start_char, 1);
1614 /* if we are implementing RTS/CTS, toggle that line */
1615 if (tty->termios.c_cflag & CRTSCTS) {
1616 mos7840_port->shadowMCR |= MCR_RTS;
1617 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1618 mos7840_port->shadowMCR);
1624 static int mos7840_tiocmget(struct tty_struct *tty)
1626 struct usb_serial_port *port = tty->driver_data;
1627 struct moschip_port *mos7840_port;
1628 unsigned int result;
1632 mos7840_port = mos7840_get_port_private(port);
1634 if (mos7840_port == NULL)
1637 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1638 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1639 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1640 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1641 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1642 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1643 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1644 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1645 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1647 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
1652 static int mos7840_tiocmset(struct tty_struct *tty,
1653 unsigned int set, unsigned int clear)
1655 struct usb_serial_port *port = tty->driver_data;
1656 struct moschip_port *mos7840_port;
1660 mos7840_port = mos7840_get_port_private(port);
1662 if (mos7840_port == NULL)
1665 /* FIXME: What locks the port registers ? */
1666 mcr = mos7840_port->shadowMCR;
1667 if (clear & TIOCM_RTS)
1669 if (clear & TIOCM_DTR)
1671 if (clear & TIOCM_LOOP)
1672 mcr &= ~MCR_LOOPBACK;
1674 if (set & TIOCM_RTS)
1676 if (set & TIOCM_DTR)
1678 if (set & TIOCM_LOOP)
1679 mcr |= MCR_LOOPBACK;
1681 mos7840_port->shadowMCR = mcr;
1683 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1685 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n");
1692 /*****************************************************************************
1693 * mos7840_calc_baud_rate_divisor
1694 * this function calculates the proper baud rate divisor for the specified
1696 *****************************************************************************/
1697 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port,
1698 int baudRate, int *divisor,
1701 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate);
1703 if (baudRate <= 115200) {
1704 *divisor = 115200 / baudRate;
1707 if ((baudRate > 115200) && (baudRate <= 230400)) {
1708 *divisor = 230400 / baudRate;
1709 *clk_sel_val = 0x10;
1710 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1711 *divisor = 403200 / baudRate;
1712 *clk_sel_val = 0x20;
1713 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1714 *divisor = 460800 / baudRate;
1715 *clk_sel_val = 0x30;
1716 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1717 *divisor = 806400 / baudRate;
1718 *clk_sel_val = 0x40;
1719 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1720 *divisor = 921600 / baudRate;
1721 *clk_sel_val = 0x50;
1722 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1723 *divisor = 1572864 / baudRate;
1724 *clk_sel_val = 0x60;
1725 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1726 *divisor = 3145728 / baudRate;
1727 *clk_sel_val = 0x70;
1733 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1734 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1735 *divisor = mos7840_divisor_table[i].Divisor;
1740 /* After trying for all the standard baud rates *
1741 * Try calculating the divisor for this baud rate */
1743 if (baudrate > 75 && baudrate < 230400) {
1744 /* get the divisor */
1745 custom = (__u16) (230400L / baudrate);
1747 /* Check for round off */
1748 round1 = (__u16) (2304000L / baudrate);
1749 round = (__u16) (round1 - (custom * 10));
1754 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom);
1758 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n");
1763 /*****************************************************************************
1764 * mos7840_send_cmd_write_baud_rate
1765 * this function sends the proper command to change the baud rate of the
1767 *****************************************************************************/
1769 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1775 unsigned char number;
1777 struct usb_serial_port *port;
1779 if (mos7840_port == NULL)
1782 port = mos7840_port->port;
1783 if (mos7840_port_paranoia_check(port, __func__))
1786 if (mos7840_serial_paranoia_check(port->serial, __func__))
1789 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1791 dev_dbg(&port->dev, "%s - port = %d, baud = %d\n", __func__,
1792 mos7840_port->port->number, baudRate);
1793 /* reset clk_uart_sel in spregOffset */
1794 if (baudRate > 115200) {
1795 #ifdef HW_flow_control
1796 /* NOTE: need to see the pther register to modify */
1797 /* setting h/w flow control bit to 1 */
1799 mos7840_port->shadowMCR = Data;
1800 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1803 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1809 #ifdef HW_flow_control
1810 /* setting h/w flow control bit to 0 */
1812 mos7840_port->shadowMCR = Data;
1813 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1816 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1823 if (1) { /* baudRate <= 115200) */
1826 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor,
1828 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1831 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n");
1834 Data = (Data & 0x8f) | clk_sel_val;
1835 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1838 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1841 /* Calculate the Divisor */
1844 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1847 /* Enable access to divisor latch */
1848 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1849 mos7840_port->shadowLCR = Data;
1850 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1852 /* Write the divisor */
1853 Data = (unsigned char)(divisor & 0xff);
1854 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data);
1855 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1857 Data = (unsigned char)((divisor & 0xff00) >> 8);
1858 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data);
1859 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1861 /* Disable access to divisor latch */
1862 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1863 mos7840_port->shadowLCR = Data;
1864 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1870 /*****************************************************************************
1871 * mos7840_change_port_settings
1872 * This routine is called to set the UART on the device to match
1873 * the specified new settings.
1874 *****************************************************************************/
1876 static void mos7840_change_port_settings(struct tty_struct *tty,
1877 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1887 struct usb_serial_port *port;
1888 struct usb_serial *serial;
1890 if (mos7840_port == NULL)
1893 port = mos7840_port->port;
1895 if (mos7840_port_paranoia_check(port, __func__))
1898 if (mos7840_serial_paranoia_check(port->serial, __func__))
1901 serial = port->serial;
1903 if (!mos7840_port->open) {
1904 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1910 lParity = LCR_PAR_NONE;
1912 cflag = tty->termios.c_cflag;
1913 iflag = tty->termios.c_iflag;
1915 /* Change the number of bits */
1916 if (cflag & CSIZE) {
1917 switch (cflag & CSIZE) {
1935 /* Change the Parity bit */
1936 if (cflag & PARENB) {
1937 if (cflag & PARODD) {
1938 lParity = LCR_PAR_ODD;
1939 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
1941 lParity = LCR_PAR_EVEN;
1942 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
1946 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
1950 lParity = lParity | 0x20;
1952 /* Change the Stop bit */
1953 if (cflag & CSTOPB) {
1955 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
1958 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
1961 /* Update the LCR with the correct value */
1962 mos7840_port->shadowLCR &=
1963 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1964 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1966 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
1967 mos7840_port->shadowLCR);
1968 /* Disable Interrupts */
1970 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1973 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1976 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1978 /* Send the updated LCR value to the mos7840 */
1979 Data = mos7840_port->shadowLCR;
1981 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1984 mos7840_port->shadowMCR = Data;
1985 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1987 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1989 /* set up the MCR register and send it to the mos7840 */
1991 mos7840_port->shadowMCR = MCR_MASTER_IE;
1993 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
1995 if (cflag & CRTSCTS)
1996 mos7840_port->shadowMCR |= (MCR_XON_ANY);
1998 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
2000 Data = mos7840_port->shadowMCR;
2001 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2003 /* Determine divisor based on baud rate */
2004 baud = tty_get_baud_rate(tty);
2007 /* pick a default, any default... */
2008 dev_dbg(&port->dev, "%s", "Picked default baud...\n");
2012 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
2013 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2015 /* Enable Interrupts */
2017 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2019 if (mos7840_port->read_urb_busy == false) {
2020 mos7840_port->read_urb_busy = true;
2021 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2023 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
2025 mos7840_port->read_urb_busy = false;
2028 wake_up(&mos7840_port->delta_msr_wait);
2029 mos7840_port->delta_msr_cond = 1;
2030 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
2031 mos7840_port->shadowLCR);
2034 /*****************************************************************************
2035 * mos7840_set_termios
2036 * this function is called by the tty driver when it wants to change
2037 * the termios structure
2038 *****************************************************************************/
2040 static void mos7840_set_termios(struct tty_struct *tty,
2041 struct usb_serial_port *port,
2042 struct ktermios *old_termios)
2046 struct usb_serial *serial;
2047 struct moschip_port *mos7840_port;
2049 if (mos7840_port_paranoia_check(port, __func__))
2052 serial = port->serial;
2054 if (mos7840_serial_paranoia_check(serial, __func__))
2057 mos7840_port = mos7840_get_port_private(port);
2059 if (mos7840_port == NULL)
2062 if (!mos7840_port->open) {
2063 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
2067 dev_dbg(&port->dev, "%s", "setting termios - \n");
2069 cflag = tty->termios.c_cflag;
2071 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
2072 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag));
2073 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
2074 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2075 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
2077 /* change the port settings to the new ones specified */
2079 mos7840_change_port_settings(tty, mos7840_port, old_termios);
2081 if (!mos7840_port->read_urb) {
2082 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n");
2086 if (mos7840_port->read_urb_busy == false) {
2087 mos7840_port->read_urb_busy = true;
2088 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2090 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
2092 mos7840_port->read_urb_busy = false;
2097 /*****************************************************************************
2098 * mos7840_get_lsr_info - get line status register info
2100 * Purpose: Let user call ioctl() to get info when the UART physically
2101 * is emptied. On bus types like RS485, the transmitter must
2102 * release the bus after transmitting. This must be done when
2103 * the transmit shift register is empty, not be done when the
2104 * transmit holding register is empty. This functionality
2105 * allows an RS485 driver to be written in user space.
2106 *****************************************************************************/
2108 static int mos7840_get_lsr_info(struct tty_struct *tty,
2109 unsigned int __user *value)
2112 unsigned int result = 0;
2114 count = mos7840_chars_in_buffer(tty);
2116 result = TIOCSER_TEMT;
2118 if (copy_to_user(value, &result, sizeof(int)))
2123 /*****************************************************************************
2124 * mos7840_get_serial_info
2125 * function to get information about serial port
2126 *****************************************************************************/
2128 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2129 struct serial_struct __user *retinfo)
2131 struct serial_struct tmp;
2133 if (mos7840_port == NULL)
2139 memset(&tmp, 0, sizeof(tmp));
2141 tmp.type = PORT_16550A;
2142 tmp.line = mos7840_port->port->serial->minor;
2143 tmp.port = mos7840_port->port->number;
2145 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2146 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2147 tmp.baud_base = 9600;
2148 tmp.close_delay = 5 * HZ;
2149 tmp.closing_wait = 30 * HZ;
2151 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2156 static int mos7840_get_icount(struct tty_struct *tty,
2157 struct serial_icounter_struct *icount)
2159 struct usb_serial_port *port = tty->driver_data;
2160 struct moschip_port *mos7840_port;
2161 struct async_icount cnow;
2163 mos7840_port = mos7840_get_port_private(port);
2164 cnow = mos7840_port->icount;
2167 icount->cts = cnow.cts;
2168 icount->dsr = cnow.dsr;
2169 icount->rng = cnow.rng;
2170 icount->dcd = cnow.dcd;
2171 icount->rx = cnow.rx;
2172 icount->tx = cnow.tx;
2173 icount->frame = cnow.frame;
2174 icount->overrun = cnow.overrun;
2175 icount->parity = cnow.parity;
2176 icount->brk = cnow.brk;
2177 icount->buf_overrun = cnow.buf_overrun;
2179 dev_dbg(&port->dev, "%s TIOCGICOUNT RX=%d, TX=%d\n", __func__,
2180 icount->rx, icount->tx);
2184 /*****************************************************************************
2186 * this function handles any ioctl calls to the driver
2187 *****************************************************************************/
2189 static int mos7840_ioctl(struct tty_struct *tty,
2190 unsigned int cmd, unsigned long arg)
2192 struct usb_serial_port *port = tty->driver_data;
2193 void __user *argp = (void __user *)arg;
2194 struct moschip_port *mos7840_port;
2196 struct async_icount cnow;
2197 struct async_icount cprev;
2199 if (mos7840_port_paranoia_check(port, __func__))
2202 mos7840_port = mos7840_get_port_private(port);
2204 if (mos7840_port == NULL)
2207 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd);
2210 /* return number of bytes available */
2213 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
2214 return mos7840_get_lsr_info(tty, argp);
2217 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
2218 return mos7840_get_serial_info(mos7840_port, argp);
2221 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__);
2225 dev_dbg(&port->dev, "%s TIOCMIWAIT\n", __func__);
2226 cprev = mos7840_port->icount;
2228 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2229 mos7840_port->delta_msr_cond = 0;
2230 wait_event_interruptible(mos7840_port->delta_msr_wait,
2232 delta_msr_cond == 1));
2234 /* see if a signal did it */
2235 if (signal_pending(current))
2236 return -ERESTARTSYS;
2237 cnow = mos7840_port->icount;
2239 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2240 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2241 return -EIO; /* no change => error */
2242 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2243 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2244 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2245 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2256 return -ENOIOCTLCMD;
2259 static int mos7810_check(struct usb_serial *serial)
2261 int i, pass_count = 0;
2262 __u16 data = 0, mcr_data = 0;
2263 __u16 test_pattern = 0x55AA;
2265 /* Store MCR setting */
2266 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2267 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
2268 &mcr_data, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2270 for (i = 0; i < 16; i++) {
2271 /* Send the 1-bit test pattern out to MCS7810 test pin */
2272 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2273 MCS_WRREQ, MCS_WR_RTYPE,
2274 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
2275 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
2277 /* Read the test pattern back */
2278 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2279 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
2280 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2282 /* If this is a MCS7810 device, both test patterns must match */
2283 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
2289 /* Restore MCR setting */
2290 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
2291 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
2292 0, MOS_WDR_TIMEOUT);
2294 if (pass_count == 16)
2300 static int mos7840_calc_num_ports(struct usb_serial *serial)
2303 int mos7840_num_ports;
2305 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2306 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
2307 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2309 if (serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7810 ||
2310 serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7820) {
2311 device_type = serial->dev->descriptor.idProduct;
2313 /* For a MCS7840 device GPIO0 must be set to 1 */
2314 if ((data & 0x01) == 1)
2315 device_type = MOSCHIP_DEVICE_ID_7840;
2316 else if (mos7810_check(serial))
2317 device_type = MOSCHIP_DEVICE_ID_7810;
2319 device_type = MOSCHIP_DEVICE_ID_7820;
2322 mos7840_num_ports = (device_type >> 4) & 0x000F;
2323 serial->num_bulk_in = mos7840_num_ports;
2324 serial->num_bulk_out = mos7840_num_ports;
2325 serial->num_ports = mos7840_num_ports;
2327 return mos7840_num_ports;
2330 static int mos7840_port_probe(struct usb_serial_port *port)
2332 struct usb_serial *serial = port->serial;
2333 struct moschip_port *mos7840_port;
2338 /* we set up the pointers to the endpoints in the mos7840_open *
2339 * function, as the structures aren't created yet. */
2341 pnum = port->number - serial->minor;
2343 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum);
2344 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2345 if (mos7840_port == NULL) {
2346 dev_err(&port->dev, "%s - Out of memory\n", __func__);
2350 /* Initialize all port interrupt end point to port 0 int
2351 * endpoint. Our device has only one interrupt end point
2352 * common to all port */
2354 mos7840_port->port = port;
2355 mos7840_set_port_private(port, mos7840_port);
2356 spin_lock_init(&mos7840_port->pool_lock);
2358 /* minor is not initialised until later by
2359 * usb-serial.c:get_free_serial() and cannot therefore be used
2360 * to index device instances */
2361 mos7840_port->port_num = pnum + 1;
2362 dev_dbg(&port->dev, "port->number = %d\n", port->number);
2363 dev_dbg(&port->dev, "port->serial->minor = %d\n", port->serial->minor);
2364 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
2365 dev_dbg(&port->dev, "serial->minor = %d\n", serial->minor);
2367 if (mos7840_port->port_num == 1) {
2368 mos7840_port->SpRegOffset = 0x0;
2369 mos7840_port->ControlRegOffset = 0x1;
2370 mos7840_port->DcrRegOffset = 0x4;
2371 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) {
2372 mos7840_port->SpRegOffset = 0x8;
2373 mos7840_port->ControlRegOffset = 0x9;
2374 mos7840_port->DcrRegOffset = 0x16;
2375 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) {
2376 mos7840_port->SpRegOffset = 0xa;
2377 mos7840_port->ControlRegOffset = 0xb;
2378 mos7840_port->DcrRegOffset = 0x19;
2379 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) {
2380 mos7840_port->SpRegOffset = 0xa;
2381 mos7840_port->ControlRegOffset = 0xb;
2382 mos7840_port->DcrRegOffset = 0x19;
2383 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) {
2384 mos7840_port->SpRegOffset = 0xc;
2385 mos7840_port->ControlRegOffset = 0xd;
2386 mos7840_port->DcrRegOffset = 0x1c;
2388 mos7840_dump_serial_port(port, mos7840_port);
2389 mos7840_set_port_private(port, mos7840_port);
2391 /* enable rx_disable bit in control register */
2392 status = mos7840_get_reg_sync(port,
2393 mos7840_port->ControlRegOffset, &Data);
2395 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status);
2398 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status);
2399 Data |= 0x08; /* setting driver done bit */
2400 Data |= 0x04; /* sp1_bit to have cts change reflect in
2403 /* Data |= 0x20; //rx_disable bit */
2404 status = mos7840_set_reg_sync(port,
2405 mos7840_port->ControlRegOffset, Data);
2407 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2410 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status);
2412 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2415 status = mos7840_set_reg_sync(port,
2416 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2418 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status);
2421 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status);
2424 status = mos7840_set_reg_sync(port,
2425 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2427 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status);
2430 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status);
2433 status = mos7840_set_reg_sync(port,
2434 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2436 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status);
2439 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status);
2441 /* write values in clkstart0x0 and clkmulti 0x20 */
2443 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data);
2445 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2448 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2451 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data);
2453 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
2456 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
2458 /* write value 0x0 to scratchpad register */
2460 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data);
2462 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
2465 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status);
2467 /* Zero Length flag register */
2468 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) {
2470 status = mos7840_set_reg_sync(port,
2472 ((__u16)mos7840_port->port_num)), Data);
2473 dev_dbg(&port->dev, "ZLIP offset %x\n",
2474 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
2476 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status);
2479 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status);
2482 status = mos7840_set_reg_sync(port,
2484 ((__u16)mos7840_port->port_num) - 0x1), Data);
2485 dev_dbg(&port->dev, "ZLIP offset %x\n",
2486 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
2488 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status);
2491 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status);
2494 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2495 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2496 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2498 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2499 !mos7840_port->dr) {
2504 mos7840_port->has_led = false;
2506 /* Initialize LED timers */
2507 if (device_type == MOSCHIP_DEVICE_ID_7810) {
2508 mos7840_port->has_led = true;
2510 init_timer(&mos7840_port->led_timer1);
2511 mos7840_port->led_timer1.function = mos7840_led_off;
2512 mos7840_port->led_timer1.expires =
2513 jiffies + msecs_to_jiffies(LED_ON_MS);
2514 mos7840_port->led_timer1.data = (unsigned long)mos7840_port;
2516 init_timer(&mos7840_port->led_timer2);
2517 mos7840_port->led_timer2.function = mos7840_led_flag_off;
2518 mos7840_port->led_timer2.expires =
2519 jiffies + msecs_to_jiffies(LED_OFF_MS);
2520 mos7840_port->led_timer2.data = (unsigned long)mos7840_port;
2522 mos7840_port->led_flag = false;
2525 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2528 if (pnum == serial->num_ports - 1) {
2529 /* Zero Length flag enable */
2531 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2533 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
2536 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status);
2538 /* setting configuration feature to one */
2539 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2540 0x03, 0x00, 0x01, 0x00, NULL, 0x00,
2545 kfree(mos7840_port->dr);
2546 kfree(mos7840_port->ctrl_buf);
2547 usb_free_urb(mos7840_port->control_urb);
2548 kfree(mos7840_port);
2553 static int mos7840_port_remove(struct usb_serial_port *port)
2555 struct moschip_port *mos7840_port;
2557 mos7840_port = mos7840_get_port_private(port);
2559 if (mos7840_port->has_led) {
2561 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2563 del_timer_sync(&mos7840_port->led_timer1);
2564 del_timer_sync(&mos7840_port->led_timer2);
2566 usb_kill_urb(mos7840_port->control_urb);
2567 usb_free_urb(mos7840_port->control_urb);
2568 kfree(mos7840_port->ctrl_buf);
2569 kfree(mos7840_port->dr);
2570 kfree(mos7840_port);
2575 static struct usb_serial_driver moschip7840_4port_device = {
2577 .owner = THIS_MODULE,
2580 .description = DRIVER_DESC,
2581 .id_table = id_table,
2583 .open = mos7840_open,
2584 .close = mos7840_close,
2585 .write = mos7840_write,
2586 .write_room = mos7840_write_room,
2587 .chars_in_buffer = mos7840_chars_in_buffer,
2588 .throttle = mos7840_throttle,
2589 .unthrottle = mos7840_unthrottle,
2590 .calc_num_ports = mos7840_calc_num_ports,
2591 #ifdef MCSSerialProbe
2592 .probe = mos7840_serial_probe,
2594 .ioctl = mos7840_ioctl,
2595 .set_termios = mos7840_set_termios,
2596 .break_ctl = mos7840_break,
2597 .tiocmget = mos7840_tiocmget,
2598 .tiocmset = mos7840_tiocmset,
2599 .get_icount = mos7840_get_icount,
2600 .port_probe = mos7840_port_probe,
2601 .port_remove = mos7840_port_remove,
2602 .read_bulk_callback = mos7840_bulk_in_callback,
2603 .read_int_callback = mos7840_interrupt_callback,
2606 static struct usb_serial_driver * const serial_drivers[] = {
2607 &moschip7840_4port_device, NULL
2610 module_usb_serial_driver(serial_drivers, id_table);
2612 MODULE_DESCRIPTION(DRIVER_DESC);
2613 MODULE_LICENSE("GPL");