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>
38 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
41 * 16C50 UART register defines
44 #define LCR_BITS_5 0x00 /* 5 bits/char */
45 #define LCR_BITS_6 0x01 /* 6 bits/char */
46 #define LCR_BITS_7 0x02 /* 7 bits/char */
47 #define LCR_BITS_8 0x03 /* 8 bits/char */
48 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
50 #define LCR_STOP_1 0x00 /* 1 stop bit */
51 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
52 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
53 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
55 #define LCR_PAR_NONE 0x00 /* No parity */
56 #define LCR_PAR_ODD 0x08 /* Odd parity */
57 #define LCR_PAR_EVEN 0x18 /* Even parity */
58 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
59 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
60 #define LCR_PAR_MASK 0x38 /* Mask for parity field */
62 #define LCR_SET_BREAK 0x40 /* Set Break condition */
63 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
65 #define MCR_DTR 0x01 /* Assert DTR */
66 #define MCR_RTS 0x02 /* Assert RTS */
67 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
68 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
69 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
70 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
72 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
73 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
74 #define MOS7840_MSR_RI 0x40 /* Current state of RI */
75 #define MOS7840_MSR_CD 0x80 /* Current state of CD */
78 * Defines used for sending commands to port
81 #define MOS_WDR_TIMEOUT 5000 /* default urb timeout */
83 #define MOS_PORT1 0x0200
84 #define MOS_PORT2 0x0300
85 #define MOS_VENREG 0x0000
86 #define MOS_MAX_PORT 0x02
87 #define MOS_WRITE 0x0E
91 #define MCS_RD_RTYPE 0xC0
92 #define MCS_WR_RTYPE 0x40
93 #define MCS_RDREQ 0x0D
94 #define MCS_WRREQ 0x0E
95 #define MCS_CTRL_TIMEOUT 500
96 #define VENDOR_READ_LENGTH (0x01)
98 #define MAX_NAME_LEN 64
100 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
101 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
103 /* For higher baud Rates use TIOCEXBAUD */
104 #define TIOCEXBAUD 0x5462
106 /* vendor id and device id defines */
108 /* The native mos7840/7820 component */
109 #define USB_VENDOR_ID_MOSCHIP 0x9710
110 #define MOSCHIP_DEVICE_ID_7840 0x7840
111 #define MOSCHIP_DEVICE_ID_7820 0x7820
112 #define MOSCHIP_DEVICE_ID_7810 0x7810
113 /* The native component can have its vendor/device id's overridden
114 * in vendor-specific implementations. Such devices can be handled
115 * by making a change here, in id_table.
117 #define USB_VENDOR_ID_BANDB 0x0856
118 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
119 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00
120 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
121 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01
122 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29
123 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30
124 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31
125 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32
126 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
127 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02
128 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
129 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
130 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
132 /* This driver also supports
133 * ATEN UC2324 device using Moschip MCS7840
134 * ATEN UC2322 device using Moschip MCS7820
136 #define USB_VENDOR_ID_ATENINTL 0x0557
137 #define ATENINTL_DEVICE_ID_UC2324 0x2011
138 #define ATENINTL_DEVICE_ID_UC2322 0x7820
140 /* Interrupt Routine Defines */
142 #define SERIAL_IIR_RLS 0x06
143 #define SERIAL_IIR_MS 0x00
146 * Emulation of the bit mask on the LINE STATUS REGISTER.
148 #define SERIAL_LSR_DR 0x0001
149 #define SERIAL_LSR_OE 0x0002
150 #define SERIAL_LSR_PE 0x0004
151 #define SERIAL_LSR_FE 0x0008
152 #define SERIAL_LSR_BI 0x0010
154 #define MOS_MSR_DELTA_CTS 0x10
155 #define MOS_MSR_DELTA_DSR 0x20
156 #define MOS_MSR_DELTA_RI 0x40
157 #define MOS_MSR_DELTA_CD 0x80
159 /* Serial Port register Address */
160 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
161 #define FIFO_CONTROL_REGISTER ((__u16)(0x02))
162 #define LINE_CONTROL_REGISTER ((__u16)(0x03))
163 #define MODEM_CONTROL_REGISTER ((__u16)(0x04))
164 #define LINE_STATUS_REGISTER ((__u16)(0x05))
165 #define MODEM_STATUS_REGISTER ((__u16)(0x06))
166 #define SCRATCH_PAD_REGISTER ((__u16)(0x07))
167 #define DIVISOR_LATCH_LSB ((__u16)(0x00))
168 #define DIVISOR_LATCH_MSB ((__u16)(0x01))
170 #define CLK_MULTI_REGISTER ((__u16)(0x02))
171 #define CLK_START_VALUE_REGISTER ((__u16)(0x03))
172 #define GPIO_REGISTER ((__u16)(0x07))
174 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
177 * URB POOL related defines
179 #define NUM_URBS 16 /* URB Count */
180 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
182 /* LED on/off milliseconds*/
183 #define LED_ON_MS 500
184 #define LED_OFF_MS 500
186 static int device_type;
188 static const struct usb_device_id id_table[] = {
189 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
190 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
191 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)},
192 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
193 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
194 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
205 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
206 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
207 {} /* terminating entry */
209 MODULE_DEVICE_TABLE(usb, id_table);
211 /* This structure holds all of the local port information */
213 struct moschip_port {
214 int port_num; /*Actual port number in the device(1,2,etc) */
215 struct urb *write_urb; /* write URB for this port */
216 struct urb *read_urb; /* read URB for this port */
217 __u8 shadowLCR; /* last LCR value received */
218 __u8 shadowMCR; /* last MCR value received */
221 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
222 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
224 struct async_icount icount;
225 struct usb_serial_port *port; /* loop back to the owner of this object */
229 __u8 ControlRegOffset;
231 /* for processing control URBS in interrupt context */
232 struct urb *control_urb;
233 struct usb_ctrlrequest *dr;
237 spinlock_t pool_lock;
238 struct urb *write_urb_pool[NUM_URBS];
242 /* For device(s) with LED indicator */
245 struct timer_list led_timer1; /* Timer for LED on */
246 struct timer_list led_timer2; /* Timer for LED off */
250 * mos7840_set_reg_sync
251 * To set the Control register by calling usb_fill_control_urb function
252 * by passing usb_sndctrlpipe function as parameter.
255 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
258 struct usb_device *dev = port->serial->dev;
260 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
262 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
263 MCS_WR_RTYPE, val, reg, NULL, 0,
268 * mos7840_get_reg_sync
269 * To set the Uart register by calling usb_fill_control_urb function by
270 * passing usb_rcvctrlpipe function as parameter.
273 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
276 struct usb_device *dev = port->serial->dev;
280 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
284 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
285 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
288 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val);
295 * mos7840_set_uart_reg
296 * To set the Uart register by calling usb_fill_control_urb function by
297 * passing usb_sndctrlpipe function as parameter.
300 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
304 struct usb_device *dev = port->serial->dev;
306 /* For the UART control registers, the application number need
308 if (port->serial->num_ports == 4) {
309 val |= (((__u16) port->number -
310 (__u16) (port->serial->minor)) + 1) << 8;
312 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
313 val |= (((__u16) port->number -
314 (__u16) (port->serial->minor)) + 1) << 8;
316 val |= (((__u16) port->number -
317 (__u16) (port->serial->minor)) + 2) << 8;
320 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val);
321 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
322 MCS_WR_RTYPE, val, reg, NULL, 0,
328 * mos7840_get_uart_reg
329 * To set the Control register by calling usb_fill_control_urb function
330 * by passing usb_rcvctrlpipe function as parameter.
332 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
335 struct usb_device *dev = port->serial->dev;
340 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
344 /* Wval is same as application number */
345 if (port->serial->num_ports == 4) {
347 (((__u16) port->number - (__u16) (port->serial->minor)) +
350 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
351 Wval = (((__u16) port->number -
352 (__u16) (port->serial->minor)) + 1) << 8;
354 Wval = (((__u16) port->number -
355 (__u16) (port->serial->minor)) + 2) << 8;
358 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval);
359 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
360 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
368 static void mos7840_dump_serial_port(struct usb_serial_port *port,
369 struct moschip_port *mos7840_port)
372 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
373 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset);
374 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset);
378 /************************************************************************/
379 /************************************************************************/
380 /* I N T E R F A C E F U N C T I O N S */
381 /* I N T E R F A C E F U N C T I O N S */
382 /************************************************************************/
383 /************************************************************************/
385 static inline void mos7840_set_port_private(struct usb_serial_port *port,
386 struct moschip_port *data)
388 usb_set_serial_port_data(port, (void *)data);
391 static inline struct moschip_port *mos7840_get_port_private(struct
395 return (struct moschip_port *)usb_get_serial_port_data(port);
398 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
400 struct moschip_port *mos7840_port;
401 struct async_icount *icount;
403 icount = &mos7840_port->icount;
405 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
407 icount = &mos7840_port->icount;
409 /* update input line counters */
410 if (new_msr & MOS_MSR_DELTA_CTS) {
414 if (new_msr & MOS_MSR_DELTA_DSR) {
418 if (new_msr & MOS_MSR_DELTA_CD) {
422 if (new_msr & MOS_MSR_DELTA_RI) {
429 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
431 struct async_icount *icount;
433 if (new_lsr & SERIAL_LSR_BI) {
435 * Parity and Framing errors only count if they
436 * occur exclusive of a break being
439 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
442 /* update input line counters */
443 icount = &port->icount;
444 if (new_lsr & SERIAL_LSR_BI) {
448 if (new_lsr & SERIAL_LSR_OE) {
452 if (new_lsr & SERIAL_LSR_PE) {
456 if (new_lsr & SERIAL_LSR_FE) {
462 /************************************************************************/
463 /************************************************************************/
464 /* U S B C A L L B A C K F U N C T I O N S */
465 /* U S B C A L L B A C K F U N C T I O N S */
466 /************************************************************************/
467 /************************************************************************/
469 static void mos7840_control_callback(struct urb *urb)
472 struct moschip_port *mos7840_port;
473 struct device *dev = &urb->dev->dev;
475 int status = urb->status;
477 mos7840_port = urb->context;
486 /* this urb is terminated, clean up */
487 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
490 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
494 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length);
495 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__,
496 mos7840_port->MsrLsr, mos7840_port->port_num);
497 data = urb->transfer_buffer;
498 regval = (__u8) data[0];
499 dev_dbg(dev, "%s data is %x\n", __func__, regval);
500 if (mos7840_port->MsrLsr == 0)
501 mos7840_handle_new_msr(mos7840_port, regval);
502 else if (mos7840_port->MsrLsr == 1)
503 mos7840_handle_new_lsr(mos7840_port, regval);
506 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
509 struct usb_device *dev = mcs->port->serial->dev;
510 struct usb_ctrlrequest *dr = mcs->dr;
511 unsigned char *buffer = mcs->ctrl_buf;
514 dr->bRequestType = MCS_RD_RTYPE;
515 dr->bRequest = MCS_RDREQ;
516 dr->wValue = cpu_to_le16(Wval); /* 0 */
517 dr->wIndex = cpu_to_le16(reg);
518 dr->wLength = cpu_to_le16(2);
520 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
521 (unsigned char *)dr, buffer, 2,
522 mos7840_control_callback, mcs);
523 mcs->control_urb->transfer_buffer_length = 2;
524 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
528 static void mos7840_set_led_callback(struct urb *urb)
530 switch (urb->status) {
537 /* This urb is terminated, clean up */
538 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d",
539 __func__, urb->status);
542 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d",
543 __func__, urb->status);
547 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
550 struct usb_device *dev = mcs->port->serial->dev;
551 struct usb_ctrlrequest *dr = mcs->dr;
553 dr->bRequestType = MCS_WR_RTYPE;
554 dr->bRequest = MCS_WRREQ;
555 dr->wValue = cpu_to_le16(wval);
556 dr->wIndex = cpu_to_le16(reg);
557 dr->wLength = cpu_to_le16(0);
559 usb_fill_control_urb(mcs->control_urb, dev, usb_sndctrlpipe(dev, 0),
560 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
562 usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
565 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
568 struct usb_device *dev = port->serial->dev;
570 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
571 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
574 static void mos7840_led_off(unsigned long arg)
576 struct moschip_port *mcs = (struct moschip_port *) arg;
579 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
580 mod_timer(&mcs->led_timer2,
581 jiffies + msecs_to_jiffies(LED_OFF_MS));
584 static void mos7840_led_flag_off(unsigned long arg)
586 struct moschip_port *mcs = (struct moschip_port *) arg;
588 mcs->led_flag = false;
591 /*****************************************************************************
592 * mos7840_interrupt_callback
593 * this is the callback function for when we have received data on the
594 * interrupt endpoint.
595 *****************************************************************************/
597 static void mos7840_interrupt_callback(struct urb *urb)
601 struct moschip_port *mos7840_port;
602 struct usb_serial *serial;
607 __u16 wval, wreg = 0;
608 int status = urb->status;
617 /* this urb is terminated, clean up */
618 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
622 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n",
627 length = urb->actual_length;
628 data = urb->transfer_buffer;
630 serial = urb->context;
632 /* Moschip get 5 bytes
633 * Byte 1 IIR Port 1 (port.number is 0)
634 * Byte 2 IIR Port 2 (port.number is 1)
635 * Byte 3 IIR Port 3 (port.number is 2)
636 * Byte 4 IIR Port 4 (port.number is 3)
637 * Byte 5 FIFO status for both */
639 if (length && length > 5) {
640 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n");
644 sp[0] = (__u8) data[0];
645 sp[1] = (__u8) data[1];
646 sp[2] = (__u8) data[2];
647 sp[3] = (__u8) data[3];
650 for (i = 0; i < serial->num_ports; i++) {
651 mos7840_port = mos7840_get_port_private(serial->port[i]);
653 (((__u16) serial->port[i]->number -
654 (__u16) (serial->minor)) + 1) << 8;
655 if (mos7840_port->open) {
657 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i);
659 switch (sp[i] & 0x0f) {
661 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i);
662 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n");
663 mos7840_port->MsrLsr = 1;
664 wreg = LINE_STATUS_REGISTER;
667 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i);
668 mos7840_port->MsrLsr = 0;
669 wreg = MODEM_STATUS_REGISTER;
672 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
677 /* the completion handler for the control urb will resubmit */
680 result = usb_submit_urb(urb, GFP_ATOMIC);
682 dev_err(&urb->dev->dev,
683 "%s - Error %d submitting interrupt urb\n",
688 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
689 const char *function)
692 pr_debug("%s - port == NULL\n", function);
696 pr_debug("%s - port->serial == NULL\n", function);
703 /* Inline functions to check the sanity of a pointer that is passed to us */
704 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
705 const char *function)
708 pr_debug("%s - serial == NULL\n", function);
712 pr_debug("%s - serial->type == NULL!\n", function);
719 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
720 const char *function)
722 /* if no port was specified, or it fails a paranoia check */
724 mos7840_port_paranoia_check(port, function) ||
725 mos7840_serial_paranoia_check(port->serial, function)) {
726 /* then say that we don't have a valid usb_serial thing,
727 * which will end up genrating -ENODEV return values */
734 /*****************************************************************************
735 * mos7840_bulk_in_callback
736 * this is the callback function for when we have received data on the
738 *****************************************************************************/
740 static void mos7840_bulk_in_callback(struct urb *urb)
744 struct usb_serial *serial;
745 struct usb_serial_port *port;
746 struct moschip_port *mos7840_port;
747 struct tty_struct *tty;
748 int status = urb->status;
750 mos7840_port = urb->context;
755 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
756 mos7840_port->read_urb_busy = false;
760 port = mos7840_port->port;
761 if (mos7840_port_paranoia_check(port, __func__)) {
762 mos7840_port->read_urb_busy = false;
766 serial = mos7840_get_usb_serial(port, __func__);
768 mos7840_port->read_urb_busy = false;
772 data = urb->transfer_buffer;
773 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
775 if (urb->actual_length) {
776 tty = tty_port_tty_get(&mos7840_port->port->port);
778 tty_insert_flip_string(tty, data, urb->actual_length);
779 tty_flip_buffer_push(tty);
782 mos7840_port->icount.rx += urb->actual_length;
784 dev_dbg(&port->dev, "mos7840_port->icount.rx is %d:\n", mos7840_port->icount.rx);
787 if (!mos7840_port->read_urb) {
788 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n");
789 mos7840_port->read_urb_busy = false;
794 if (mos7840_port->has_led && !mos7840_port->led_flag) {
795 mos7840_port->led_flag = true;
796 mos7840_set_led_async(mos7840_port, 0x0301,
797 MODEM_CONTROL_REGISTER);
798 mod_timer(&mos7840_port->led_timer1,
799 jiffies + msecs_to_jiffies(LED_ON_MS));
802 mos7840_port->read_urb_busy = true;
803 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
806 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
807 mos7840_port->read_urb_busy = false;
811 /*****************************************************************************
812 * mos7840_bulk_out_data_callback
813 * this is the callback function for when we have finished sending
814 * serial data on the bulk out endpoint.
815 *****************************************************************************/
817 static void mos7840_bulk_out_data_callback(struct urb *urb)
819 struct moschip_port *mos7840_port;
820 struct usb_serial_port *port;
821 struct tty_struct *tty;
822 int status = urb->status;
825 mos7840_port = urb->context;
826 port = mos7840_port->port;
827 spin_lock(&mos7840_port->pool_lock);
828 for (i = 0; i < NUM_URBS; i++) {
829 if (urb == mos7840_port->write_urb_pool[i]) {
830 mos7840_port->busy[i] = 0;
834 spin_unlock(&mos7840_port->pool_lock);
837 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);
841 if (mos7840_port_paranoia_check(port, __func__))
844 tty = tty_port_tty_get(&port->port);
845 if (tty && mos7840_port->open)
851 /************************************************************************/
852 /* 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 */
853 /************************************************************************/
854 #ifdef MCSSerialProbe
855 static int mos7840_serial_probe(struct usb_serial *serial,
856 const struct usb_device_id *id)
859 /*need to implement the mode_reg reading and updating\
860 structures usb_serial_ device_type\
861 (i.e num_ports, num_bulkin,bulkout etc) */
862 /* Also we can update the changes attach */
867 /*****************************************************************************
869 * this function is called by the tty driver when a port is opened
870 * If successful, we return 0
871 * Otherwise we return a negative error number.
872 *****************************************************************************/
874 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
878 struct usb_serial *serial;
882 struct moschip_port *mos7840_port;
883 struct moschip_port *port0;
885 if (mos7840_port_paranoia_check(port, __func__))
888 serial = port->serial;
890 if (mos7840_serial_paranoia_check(serial, __func__))
893 mos7840_port = mos7840_get_port_private(port);
894 port0 = mos7840_get_port_private(serial->port[0]);
896 if (mos7840_port == NULL || port0 == NULL)
899 usb_clear_halt(serial->dev, port->write_urb->pipe);
900 usb_clear_halt(serial->dev, port->read_urb->pipe);
903 /* Initialising the write urb pool */
904 for (j = 0; j < NUM_URBS; ++j) {
905 urb = usb_alloc_urb(0, GFP_KERNEL);
906 mos7840_port->write_urb_pool[j] = urb;
909 dev_err(&port->dev, "No more urbs???\n");
913 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
915 if (!urb->transfer_buffer) {
917 mos7840_port->write_urb_pool[j] = NULL;
919 "%s-out of memory for urb buffers.\n",
925 /*****************************************************************************
926 * Initialize MCS7840 -- Write Init values to corresponding Registers
934 * 0x08 : SP1/2 Control Reg
935 *****************************************************************************/
937 /* NEED to check the following Block */
940 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
942 dev_dbg(&port->dev, "Reading Spreg failed\n");
946 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
948 dev_dbg(&port->dev, "writing Spreg failed\n");
953 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
955 dev_dbg(&port->dev, "writing Spreg failed\n");
958 /* End of block to be checked */
961 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
964 dev_dbg(&port->dev, "Reading Controlreg failed\n");
967 Data |= 0x08; /* Driver done bit */
968 Data |= 0x20; /* rx_disable */
969 status = mos7840_set_reg_sync(port,
970 mos7840_port->ControlRegOffset, Data);
972 dev_dbg(&port->dev, "writing Controlreg failed\n");
975 /* do register settings here */
976 /* Set all regs to the device default values. */
977 /***********************************
978 * First Disable all interrupts.
979 ***********************************/
981 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
983 dev_dbg(&port->dev, "disabling interrupts failed\n");
986 /* Set FIFO_CONTROL_REGISTER to the default value */
988 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
990 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
995 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
997 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
1002 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1003 mos7840_port->shadowLCR = Data;
1006 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1007 mos7840_port->shadowMCR = Data;
1010 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1011 mos7840_port->shadowLCR = Data;
1013 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1014 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1017 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1020 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1023 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1025 Data = Data & ~SERIAL_LCR_DLAB;
1026 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1027 mos7840_port->shadowLCR = Data;
1029 /* clearing Bulkin and Bulkout Fifo */
1031 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1034 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1036 Data = Data & ~0x0c;
1037 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1038 /* Finally enable all interrupts */
1040 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1042 /* clearing rx_disable */
1044 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1046 Data = Data & ~0x20;
1047 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1052 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1055 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1058 /* Check to see if we've set up our endpoint info yet *
1059 * (can't set it up in mos7840_startup as the structures *
1060 * were not set up at that time.) */
1061 if (port0->open_ports == 1) {
1062 if (serial->port[0]->interrupt_in_buffer == NULL) {
1063 /* set up interrupt urb */
1064 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1066 usb_rcvintpipe(serial->dev,
1067 serial->port[0]->interrupt_in_endpointAddress),
1068 serial->port[0]->interrupt_in_buffer,
1069 serial->port[0]->interrupt_in_urb->
1070 transfer_buffer_length,
1071 mos7840_interrupt_callback,
1073 serial->port[0]->interrupt_in_urb->interval);
1075 /* start interrupt read for mos7840 *
1076 * will continue as long as mos7840 is connected */
1079 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1082 dev_err(&port->dev, "%s - Error %d submitting "
1083 "interrupt urb\n", __func__, response);
1090 /* see if we've set up our endpoint info yet *
1091 * (can't set it up in mos7840_startup as the *
1092 * structures were not set up at that time.) */
1094 dev_dbg(&port->dev, "port number is %d\n", port->number);
1095 dev_dbg(&port->dev, "serial number is %d\n", port->serial->minor);
1096 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
1097 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
1098 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
1099 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num);
1100 mos7840_port->read_urb = port->read_urb;
1102 /* set up our bulk in urb */
1103 if ((serial->num_ports == 2)
1104 && ((((__u16)port->number -
1105 (__u16)(port->serial->minor)) % 2) != 0)) {
1106 usb_fill_bulk_urb(mos7840_port->read_urb,
1108 usb_rcvbulkpipe(serial->dev,
1109 (port->bulk_in_endpointAddress) + 2),
1110 port->bulk_in_buffer,
1111 mos7840_port->read_urb->transfer_buffer_length,
1112 mos7840_bulk_in_callback, mos7840_port);
1114 usb_fill_bulk_urb(mos7840_port->read_urb,
1116 usb_rcvbulkpipe(serial->dev,
1117 port->bulk_in_endpointAddress),
1118 port->bulk_in_buffer,
1119 mos7840_port->read_urb->transfer_buffer_length,
1120 mos7840_bulk_in_callback, mos7840_port);
1123 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, 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);
1134 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1136 /* initialize our icount structure */
1137 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1139 /* initialize our port settings */
1140 /* Must set to enable ints! */
1141 mos7840_port->shadowMCR = MCR_MASTER_IE;
1142 /* send a open port command */
1143 mos7840_port->open = 1;
1144 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1145 mos7840_port->icount.tx = 0;
1146 mos7840_port->icount.rx = 0;
1151 /*****************************************************************************
1152 * mos7840_chars_in_buffer
1153 * this function is called by the tty driver when it wants to know how many
1154 * bytes of data we currently have outstanding in the port (data that has
1155 * been written, but hasn't made it out the port yet)
1156 * If successful, we return the number of bytes left to be written in the
1158 * Otherwise we return zero.
1159 *****************************************************************************/
1161 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1163 struct usb_serial_port *port = tty->driver_data;
1166 unsigned long flags;
1167 struct moschip_port *mos7840_port;
1169 if (mos7840_port_paranoia_check(port, __func__))
1172 mos7840_port = mos7840_get_port_private(port);
1173 if (mos7840_port == NULL)
1176 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1177 for (i = 0; i < NUM_URBS; ++i) {
1178 if (mos7840_port->busy[i]) {
1179 struct urb *urb = mos7840_port->write_urb_pool[i];
1180 chars += urb->transfer_buffer_length;
1183 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1184 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
1189 /*****************************************************************************
1191 * this function is called by the tty driver when a port is closed
1192 *****************************************************************************/
1194 static void mos7840_close(struct usb_serial_port *port)
1196 struct usb_serial *serial;
1197 struct moschip_port *mos7840_port;
1198 struct moschip_port *port0;
1202 if (mos7840_port_paranoia_check(port, __func__))
1205 serial = mos7840_get_usb_serial(port, __func__);
1209 mos7840_port = mos7840_get_port_private(port);
1210 port0 = mos7840_get_port_private(serial->port[0]);
1212 if (mos7840_port == NULL || port0 == NULL)
1215 for (j = 0; j < NUM_URBS; ++j)
1216 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1218 /* Freeing Write URBs */
1219 for (j = 0; j < NUM_URBS; ++j) {
1220 if (mos7840_port->write_urb_pool[j]) {
1221 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1222 kfree(mos7840_port->write_urb_pool[j]->
1225 usb_free_urb(mos7840_port->write_urb_pool[j]);
1229 /* While closing port, shutdown all bulk read, write *
1230 * and interrupt read if they exists */
1232 if (mos7840_port->write_urb) {
1233 dev_dbg(&port->dev, "%s", "Shutdown bulk write\n");
1234 usb_kill_urb(mos7840_port->write_urb);
1236 if (mos7840_port->read_urb) {
1237 dev_dbg(&port->dev, "%s", "Shutdown bulk read\n");
1238 usb_kill_urb(mos7840_port->read_urb);
1239 mos7840_port->read_urb_busy = false;
1241 if ((&mos7840_port->control_urb)) {
1242 dev_dbg(&port->dev, "%s", "Shutdown control read\n");
1243 /*/ usb_kill_urb (mos7840_port->control_urb); */
1246 /* if(mos7840_port->ctrl_buf != NULL) */
1247 /* kfree(mos7840_port->ctrl_buf); */
1248 port0->open_ports--;
1249 dev_dbg(&port->dev, "%s in close%d:in port%d\n", __func__, port0->open_ports, port->number);
1250 if (port0->open_ports == 0) {
1251 if (serial->port[0]->interrupt_in_urb) {
1252 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n");
1253 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1257 if (mos7840_port->write_urb) {
1258 /* if this urb had a transfer buffer already (old tx) free it */
1259 if (mos7840_port->write_urb->transfer_buffer != NULL)
1260 kfree(mos7840_port->write_urb->transfer_buffer);
1261 usb_free_urb(mos7840_port->write_urb);
1265 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1268 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1270 mos7840_port->open = 0;
1273 /************************************************************************
1275 * mos7840_block_until_chase_response
1277 * This function will block the close until one of the following:
1278 * 1. Response to our Chase comes from mos7840
1279 * 2. A timeout of 10 seconds without activity has expired
1280 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1282 ************************************************************************/
1284 static void mos7840_block_until_chase_response(struct tty_struct *tty,
1285 struct moschip_port *mos7840_port)
1287 int timeout = msecs_to_jiffies(1000);
1292 count = mos7840_chars_in_buffer(tty);
1294 /* Check for Buffer status */
1298 /* Block the thread for a while */
1299 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1301 /* No activity.. count down section */
1304 dev_dbg(&mos7840_port->port->dev, "%s - TIMEOUT\n", __func__);
1307 /* Reset timeout value back to seconds */
1314 /*****************************************************************************
1316 * this function sends a break to the port
1317 *****************************************************************************/
1318 static void mos7840_break(struct tty_struct *tty, int break_state)
1320 struct usb_serial_port *port = tty->driver_data;
1322 struct usb_serial *serial;
1323 struct moschip_port *mos7840_port;
1325 if (mos7840_port_paranoia_check(port, __func__))
1328 serial = mos7840_get_usb_serial(port, __func__);
1332 mos7840_port = mos7840_get_port_private(port);
1334 if (mos7840_port == NULL)
1338 /* flush and block until tx is empty */
1339 mos7840_block_until_chase_response(tty, mos7840_port);
1341 if (break_state == -1)
1342 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1344 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1346 /* FIXME: no locking on shadowLCR anywhere in driver */
1347 mos7840_port->shadowLCR = data;
1348 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1349 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1350 mos7840_port->shadowLCR);
1353 /*****************************************************************************
1354 * mos7840_write_room
1355 * this function is called by the tty driver when it wants to know how many
1356 * bytes of data we can accept for a specific port.
1357 * If successful, we return the amount of room that we have for this port
1358 * Otherwise we return a negative error number.
1359 *****************************************************************************/
1361 static int mos7840_write_room(struct tty_struct *tty)
1363 struct usb_serial_port *port = tty->driver_data;
1366 unsigned long flags;
1367 struct moschip_port *mos7840_port;
1369 if (mos7840_port_paranoia_check(port, __func__))
1372 mos7840_port = mos7840_get_port_private(port);
1373 if (mos7840_port == NULL)
1376 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1377 for (i = 0; i < NUM_URBS; ++i) {
1378 if (!mos7840_port->busy[i])
1379 room += URB_TRANSFER_BUFFER_SIZE;
1381 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1383 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1384 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room);
1389 /*****************************************************************************
1391 * this function is called by the tty driver when data should be written to
1393 * If successful, we return the number of bytes written, otherwise we
1394 * return a negative error number.
1395 *****************************************************************************/
1397 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1398 const unsigned char *data, int count)
1404 unsigned long flags;
1406 struct moschip_port *mos7840_port;
1407 struct usb_serial *serial;
1410 const unsigned char *current_position = data;
1411 unsigned char *data1;
1415 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1416 mos7840_port->shadowLCR = Data;
1417 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data);
1418 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1421 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1422 /* mos7840_port->shadowLCR=Data;//Need to add later */
1424 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1425 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1428 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1430 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1431 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data);
1434 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1435 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data);
1437 Data = Data & ~SERIAL_LCR_DLAB;
1438 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1439 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1442 if (mos7840_port_paranoia_check(port, __func__))
1445 serial = port->serial;
1446 if (mos7840_serial_paranoia_check(serial, __func__))
1449 mos7840_port = mos7840_get_port_private(port);
1450 if (mos7840_port == NULL)
1453 /* try to find a free urb in the list */
1456 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1457 for (i = 0; i < NUM_URBS; ++i) {
1458 if (!mos7840_port->busy[i]) {
1459 mos7840_port->busy[i] = 1;
1460 urb = mos7840_port->write_urb_pool[i];
1461 dev_dbg(&port->dev, "URB:%d\n", i);
1465 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1468 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
1472 if (urb->transfer_buffer == NULL) {
1473 urb->transfer_buffer =
1474 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1476 if (urb->transfer_buffer == NULL) {
1477 dev_err_console(port, "%s no more kernel memory...\n",
1482 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1484 memcpy(urb->transfer_buffer, current_position, transfer_size);
1486 /* fill urb with data and submit */
1487 if ((serial->num_ports == 2)
1488 && ((((__u16)port->number -
1489 (__u16)(port->serial->minor)) % 2) != 0)) {
1490 usb_fill_bulk_urb(urb,
1492 usb_sndbulkpipe(serial->dev,
1493 (port->bulk_out_endpointAddress) + 2),
1494 urb->transfer_buffer,
1496 mos7840_bulk_out_data_callback, mos7840_port);
1498 usb_fill_bulk_urb(urb,
1500 usb_sndbulkpipe(serial->dev,
1501 port->bulk_out_endpointAddress),
1502 urb->transfer_buffer,
1504 mos7840_bulk_out_data_callback, mos7840_port);
1507 data1 = urb->transfer_buffer;
1508 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
1511 if (mos7840_port->has_led && !mos7840_port->led_flag) {
1512 mos7840_port->led_flag = true;
1513 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0301);
1514 mod_timer(&mos7840_port->led_timer1,
1515 jiffies + msecs_to_jiffies(LED_ON_MS));
1518 /* send it down the pipe */
1519 status = usb_submit_urb(urb, GFP_ATOMIC);
1522 mos7840_port->busy[i] = 0;
1523 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
1524 "with status = %d\n", __func__, status);
1525 bytes_sent = status;
1528 bytes_sent = transfer_size;
1529 mos7840_port->icount.tx += transfer_size;
1531 dev_dbg(&port->dev, "mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
1537 /*****************************************************************************
1539 * this function is called by the tty driver when it wants to stop the data
1540 * being read from the port.
1541 *****************************************************************************/
1543 static void mos7840_throttle(struct tty_struct *tty)
1545 struct usb_serial_port *port = tty->driver_data;
1546 struct moschip_port *mos7840_port;
1549 if (mos7840_port_paranoia_check(port, __func__))
1552 mos7840_port = mos7840_get_port_private(port);
1554 if (mos7840_port == NULL)
1557 if (!mos7840_port->open) {
1558 dev_dbg(&port->dev, "%s", "port not opened\n");
1562 /* if we are implementing XON/XOFF, send the stop character */
1564 unsigned char stop_char = STOP_CHAR(tty);
1565 status = mos7840_write(tty, port, &stop_char, 1);
1569 /* if we are implementing RTS/CTS, toggle that line */
1570 if (tty->termios.c_cflag & CRTSCTS) {
1571 mos7840_port->shadowMCR &= ~MCR_RTS;
1572 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1573 mos7840_port->shadowMCR);
1579 /*****************************************************************************
1580 * mos7840_unthrottle
1581 * this function is called by the tty driver when it wants to resume
1582 * the data being read from the port (called after mos7840_throttle is
1584 *****************************************************************************/
1585 static void mos7840_unthrottle(struct tty_struct *tty)
1587 struct usb_serial_port *port = tty->driver_data;
1589 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1591 if (mos7840_port_paranoia_check(port, __func__))
1594 if (mos7840_port == NULL)
1597 if (!mos7840_port->open) {
1598 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1602 /* if we are implementing XON/XOFF, send the start character */
1604 unsigned char start_char = START_CHAR(tty);
1605 status = mos7840_write(tty, port, &start_char, 1);
1610 /* if we are implementing RTS/CTS, toggle that line */
1611 if (tty->termios.c_cflag & CRTSCTS) {
1612 mos7840_port->shadowMCR |= MCR_RTS;
1613 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1614 mos7840_port->shadowMCR);
1620 static int mos7840_tiocmget(struct tty_struct *tty)
1622 struct usb_serial_port *port = tty->driver_data;
1623 struct moschip_port *mos7840_port;
1624 unsigned int result;
1628 mos7840_port = mos7840_get_port_private(port);
1630 if (mos7840_port == NULL)
1633 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1634 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1635 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1636 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1637 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1638 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1639 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1640 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1641 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1643 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
1648 static int mos7840_tiocmset(struct tty_struct *tty,
1649 unsigned int set, unsigned int clear)
1651 struct usb_serial_port *port = tty->driver_data;
1652 struct moschip_port *mos7840_port;
1656 mos7840_port = mos7840_get_port_private(port);
1658 if (mos7840_port == NULL)
1661 /* FIXME: What locks the port registers ? */
1662 mcr = mos7840_port->shadowMCR;
1663 if (clear & TIOCM_RTS)
1665 if (clear & TIOCM_DTR)
1667 if (clear & TIOCM_LOOP)
1668 mcr &= ~MCR_LOOPBACK;
1670 if (set & TIOCM_RTS)
1672 if (set & TIOCM_DTR)
1674 if (set & TIOCM_LOOP)
1675 mcr |= MCR_LOOPBACK;
1677 mos7840_port->shadowMCR = mcr;
1679 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1681 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n");
1688 /*****************************************************************************
1689 * mos7840_calc_baud_rate_divisor
1690 * this function calculates the proper baud rate divisor for the specified
1692 *****************************************************************************/
1693 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port,
1694 int baudRate, int *divisor,
1697 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate);
1699 if (baudRate <= 115200) {
1700 *divisor = 115200 / baudRate;
1703 if ((baudRate > 115200) && (baudRate <= 230400)) {
1704 *divisor = 230400 / baudRate;
1705 *clk_sel_val = 0x10;
1706 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1707 *divisor = 403200 / baudRate;
1708 *clk_sel_val = 0x20;
1709 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1710 *divisor = 460800 / baudRate;
1711 *clk_sel_val = 0x30;
1712 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1713 *divisor = 806400 / baudRate;
1714 *clk_sel_val = 0x40;
1715 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1716 *divisor = 921600 / baudRate;
1717 *clk_sel_val = 0x50;
1718 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1719 *divisor = 1572864 / baudRate;
1720 *clk_sel_val = 0x60;
1721 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1722 *divisor = 3145728 / baudRate;
1723 *clk_sel_val = 0x70;
1729 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1730 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1731 *divisor = mos7840_divisor_table[i].Divisor;
1736 /* After trying for all the standard baud rates *
1737 * Try calculating the divisor for this baud rate */
1739 if (baudrate > 75 && baudrate < 230400) {
1740 /* get the divisor */
1741 custom = (__u16) (230400L / baudrate);
1743 /* Check for round off */
1744 round1 = (__u16) (2304000L / baudrate);
1745 round = (__u16) (round1 - (custom * 10));
1750 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom);
1754 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n");
1759 /*****************************************************************************
1760 * mos7840_send_cmd_write_baud_rate
1761 * this function sends the proper command to change the baud rate of the
1763 *****************************************************************************/
1765 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1771 unsigned char number;
1773 struct usb_serial_port *port;
1775 if (mos7840_port == NULL)
1778 port = mos7840_port->port;
1779 if (mos7840_port_paranoia_check(port, __func__))
1782 if (mos7840_serial_paranoia_check(port->serial, __func__))
1785 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1787 dev_dbg(&port->dev, "%s - port = %d, baud = %d\n", __func__,
1788 mos7840_port->port->number, baudRate);
1789 /* reset clk_uart_sel in spregOffset */
1790 if (baudRate > 115200) {
1791 #ifdef HW_flow_control
1792 /* NOTE: need to see the pther register to modify */
1793 /* setting h/w flow control bit to 1 */
1795 mos7840_port->shadowMCR = Data;
1796 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1799 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1805 #ifdef HW_flow_control
1806 /* setting h/w flow control bit to 0 */
1808 mos7840_port->shadowMCR = Data;
1809 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1812 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1819 if (1) { /* baudRate <= 115200) */
1822 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor,
1824 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1827 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n");
1830 Data = (Data & 0x8f) | clk_sel_val;
1831 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1834 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1837 /* Calculate the Divisor */
1840 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1843 /* Enable access to divisor latch */
1844 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1845 mos7840_port->shadowLCR = Data;
1846 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1848 /* Write the divisor */
1849 Data = (unsigned char)(divisor & 0xff);
1850 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data);
1851 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1853 Data = (unsigned char)((divisor & 0xff00) >> 8);
1854 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data);
1855 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1857 /* Disable access to divisor latch */
1858 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1859 mos7840_port->shadowLCR = Data;
1860 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1866 /*****************************************************************************
1867 * mos7840_change_port_settings
1868 * This routine is called to set the UART on the device to match
1869 * the specified new settings.
1870 *****************************************************************************/
1872 static void mos7840_change_port_settings(struct tty_struct *tty,
1873 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1883 struct usb_serial_port *port;
1884 struct usb_serial *serial;
1886 if (mos7840_port == NULL)
1889 port = mos7840_port->port;
1891 if (mos7840_port_paranoia_check(port, __func__))
1894 if (mos7840_serial_paranoia_check(port->serial, __func__))
1897 serial = port->serial;
1899 if (!mos7840_port->open) {
1900 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1906 lParity = LCR_PAR_NONE;
1908 cflag = tty->termios.c_cflag;
1909 iflag = tty->termios.c_iflag;
1911 /* Change the number of bits */
1912 if (cflag & CSIZE) {
1913 switch (cflag & CSIZE) {
1931 /* Change the Parity bit */
1932 if (cflag & PARENB) {
1933 if (cflag & PARODD) {
1934 lParity = LCR_PAR_ODD;
1935 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
1937 lParity = LCR_PAR_EVEN;
1938 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
1942 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
1946 lParity = lParity | 0x20;
1948 /* Change the Stop bit */
1949 if (cflag & CSTOPB) {
1951 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
1954 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
1957 /* Update the LCR with the correct value */
1958 mos7840_port->shadowLCR &=
1959 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1960 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1962 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
1963 mos7840_port->shadowLCR);
1964 /* Disable Interrupts */
1966 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1969 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1972 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1974 /* Send the updated LCR value to the mos7840 */
1975 Data = mos7840_port->shadowLCR;
1977 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1980 mos7840_port->shadowMCR = Data;
1981 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1983 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1985 /* set up the MCR register and send it to the mos7840 */
1987 mos7840_port->shadowMCR = MCR_MASTER_IE;
1989 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
1991 if (cflag & CRTSCTS)
1992 mos7840_port->shadowMCR |= (MCR_XON_ANY);
1994 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
1996 Data = mos7840_port->shadowMCR;
1997 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1999 /* Determine divisor based on baud rate */
2000 baud = tty_get_baud_rate(tty);
2003 /* pick a default, any default... */
2004 dev_dbg(&port->dev, "%s", "Picked default baud...\n");
2008 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
2009 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2011 /* Enable Interrupts */
2013 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2015 if (mos7840_port->read_urb_busy == false) {
2016 mos7840_port->read_urb_busy = true;
2017 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2019 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
2021 mos7840_port->read_urb_busy = false;
2024 wake_up(&mos7840_port->delta_msr_wait);
2025 mos7840_port->delta_msr_cond = 1;
2026 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
2027 mos7840_port->shadowLCR);
2030 /*****************************************************************************
2031 * mos7840_set_termios
2032 * this function is called by the tty driver when it wants to change
2033 * the termios structure
2034 *****************************************************************************/
2036 static void mos7840_set_termios(struct tty_struct *tty,
2037 struct usb_serial_port *port,
2038 struct ktermios *old_termios)
2042 struct usb_serial *serial;
2043 struct moschip_port *mos7840_port;
2045 if (mos7840_port_paranoia_check(port, __func__))
2048 serial = port->serial;
2050 if (mos7840_serial_paranoia_check(serial, __func__))
2053 mos7840_port = mos7840_get_port_private(port);
2055 if (mos7840_port == NULL)
2058 if (!mos7840_port->open) {
2059 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
2063 dev_dbg(&port->dev, "%s", "setting termios - \n");
2065 cflag = tty->termios.c_cflag;
2067 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
2068 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag));
2069 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
2070 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2071 dev_dbg(&port->dev, "%s - port %d\n", __func__, port->number);
2073 /* change the port settings to the new ones specified */
2075 mos7840_change_port_settings(tty, mos7840_port, old_termios);
2077 if (!mos7840_port->read_urb) {
2078 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n");
2082 if (mos7840_port->read_urb_busy == false) {
2083 mos7840_port->read_urb_busy = true;
2084 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2086 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
2088 mos7840_port->read_urb_busy = false;
2093 /*****************************************************************************
2094 * mos7840_get_lsr_info - get line status register info
2096 * Purpose: Let user call ioctl() to get info when the UART physically
2097 * is emptied. On bus types like RS485, the transmitter must
2098 * release the bus after transmitting. This must be done when
2099 * the transmit shift register is empty, not be done when the
2100 * transmit holding register is empty. This functionality
2101 * allows an RS485 driver to be written in user space.
2102 *****************************************************************************/
2104 static int mos7840_get_lsr_info(struct tty_struct *tty,
2105 unsigned int __user *value)
2108 unsigned int result = 0;
2110 count = mos7840_chars_in_buffer(tty);
2112 result = TIOCSER_TEMT;
2114 if (copy_to_user(value, &result, sizeof(int)))
2119 /*****************************************************************************
2120 * mos7840_get_serial_info
2121 * function to get information about serial port
2122 *****************************************************************************/
2124 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2125 struct serial_struct __user *retinfo)
2127 struct serial_struct tmp;
2129 if (mos7840_port == NULL)
2135 memset(&tmp, 0, sizeof(tmp));
2137 tmp.type = PORT_16550A;
2138 tmp.line = mos7840_port->port->serial->minor;
2139 tmp.port = mos7840_port->port->number;
2141 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2142 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2143 tmp.baud_base = 9600;
2144 tmp.close_delay = 5 * HZ;
2145 tmp.closing_wait = 30 * HZ;
2147 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2152 static int mos7840_get_icount(struct tty_struct *tty,
2153 struct serial_icounter_struct *icount)
2155 struct usb_serial_port *port = tty->driver_data;
2156 struct moschip_port *mos7840_port;
2157 struct async_icount cnow;
2159 mos7840_port = mos7840_get_port_private(port);
2160 cnow = mos7840_port->icount;
2163 icount->cts = cnow.cts;
2164 icount->dsr = cnow.dsr;
2165 icount->rng = cnow.rng;
2166 icount->dcd = cnow.dcd;
2167 icount->rx = cnow.rx;
2168 icount->tx = cnow.tx;
2169 icount->frame = cnow.frame;
2170 icount->overrun = cnow.overrun;
2171 icount->parity = cnow.parity;
2172 icount->brk = cnow.brk;
2173 icount->buf_overrun = cnow.buf_overrun;
2175 dev_dbg(&port->dev, "%s TIOCGICOUNT RX=%d, TX=%d\n", __func__,
2176 icount->rx, icount->tx);
2180 /*****************************************************************************
2182 * this function handles any ioctl calls to the driver
2183 *****************************************************************************/
2185 static int mos7840_ioctl(struct tty_struct *tty,
2186 unsigned int cmd, unsigned long arg)
2188 struct usb_serial_port *port = tty->driver_data;
2189 void __user *argp = (void __user *)arg;
2190 struct moschip_port *mos7840_port;
2192 struct async_icount cnow;
2193 struct async_icount cprev;
2195 if (mos7840_port_paranoia_check(port, __func__))
2198 mos7840_port = mos7840_get_port_private(port);
2200 if (mos7840_port == NULL)
2203 dev_dbg(&port->dev, "%s - cmd = 0x%x\n", __func__, cmd);
2206 /* return number of bytes available */
2209 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
2210 return mos7840_get_lsr_info(tty, argp);
2213 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
2214 return mos7840_get_serial_info(mos7840_port, argp);
2217 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__);
2221 dev_dbg(&port->dev, "%s TIOCMIWAIT\n", __func__);
2222 cprev = mos7840_port->icount;
2224 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2225 mos7840_port->delta_msr_cond = 0;
2226 wait_event_interruptible(mos7840_port->delta_msr_wait,
2228 delta_msr_cond == 1));
2230 /* see if a signal did it */
2231 if (signal_pending(current))
2232 return -ERESTARTSYS;
2233 cnow = mos7840_port->icount;
2235 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2236 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2237 return -EIO; /* no change => error */
2238 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2239 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2240 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2241 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2252 return -ENOIOCTLCMD;
2255 static int mos7810_check(struct usb_serial *serial)
2257 int i, pass_count = 0;
2258 __u16 data = 0, mcr_data = 0;
2259 __u16 test_pattern = 0x55AA;
2261 /* Store MCR setting */
2262 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2263 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
2264 &mcr_data, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2266 for (i = 0; i < 16; i++) {
2267 /* Send the 1-bit test pattern out to MCS7810 test pin */
2268 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2269 MCS_WRREQ, MCS_WR_RTYPE,
2270 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
2271 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
2273 /* Read the test pattern back */
2274 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2275 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
2276 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2278 /* If this is a MCS7810 device, both test patterns must match */
2279 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
2285 /* Restore MCR setting */
2286 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
2287 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
2288 0, MOS_WDR_TIMEOUT);
2290 if (pass_count == 16)
2296 static int mos7840_calc_num_ports(struct usb_serial *serial)
2299 int mos7840_num_ports;
2301 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2302 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &data,
2303 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2305 if (serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7810 ||
2306 serial->dev->descriptor.idProduct == MOSCHIP_DEVICE_ID_7820) {
2307 device_type = serial->dev->descriptor.idProduct;
2309 /* For a MCS7840 device GPIO0 must be set to 1 */
2310 if ((data & 0x01) == 1)
2311 device_type = MOSCHIP_DEVICE_ID_7840;
2312 else if (mos7810_check(serial))
2313 device_type = MOSCHIP_DEVICE_ID_7810;
2315 device_type = MOSCHIP_DEVICE_ID_7820;
2318 mos7840_num_ports = (device_type >> 4) & 0x000F;
2319 serial->num_bulk_in = mos7840_num_ports;
2320 serial->num_bulk_out = mos7840_num_ports;
2321 serial->num_ports = mos7840_num_ports;
2323 return mos7840_num_ports;
2326 static int mos7840_port_probe(struct usb_serial_port *port)
2328 struct usb_serial *serial = port->serial;
2329 struct moschip_port *mos7840_port;
2334 /* we set up the pointers to the endpoints in the mos7840_open *
2335 * function, as the structures aren't created yet. */
2337 pnum = port->number - serial->minor;
2339 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum);
2340 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2341 if (mos7840_port == NULL) {
2342 dev_err(&port->dev, "%s - Out of memory\n", __func__);
2346 /* Initialize all port interrupt end point to port 0 int
2347 * endpoint. Our device has only one interrupt end point
2348 * common to all port */
2350 mos7840_port->port = port;
2351 mos7840_set_port_private(port, mos7840_port);
2352 spin_lock_init(&mos7840_port->pool_lock);
2354 /* minor is not initialised until later by
2355 * usb-serial.c:get_free_serial() and cannot therefore be used
2356 * to index device instances */
2357 mos7840_port->port_num = pnum + 1;
2358 dev_dbg(&port->dev, "port->number = %d\n", port->number);
2359 dev_dbg(&port->dev, "port->serial->minor = %d\n", port->serial->minor);
2360 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
2361 dev_dbg(&port->dev, "serial->minor = %d\n", serial->minor);
2363 if (mos7840_port->port_num == 1) {
2364 mos7840_port->SpRegOffset = 0x0;
2365 mos7840_port->ControlRegOffset = 0x1;
2366 mos7840_port->DcrRegOffset = 0x4;
2367 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) {
2368 mos7840_port->SpRegOffset = 0x8;
2369 mos7840_port->ControlRegOffset = 0x9;
2370 mos7840_port->DcrRegOffset = 0x16;
2371 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) {
2372 mos7840_port->SpRegOffset = 0xa;
2373 mos7840_port->ControlRegOffset = 0xb;
2374 mos7840_port->DcrRegOffset = 0x19;
2375 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) {
2376 mos7840_port->SpRegOffset = 0xa;
2377 mos7840_port->ControlRegOffset = 0xb;
2378 mos7840_port->DcrRegOffset = 0x19;
2379 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) {
2380 mos7840_port->SpRegOffset = 0xc;
2381 mos7840_port->ControlRegOffset = 0xd;
2382 mos7840_port->DcrRegOffset = 0x1c;
2384 mos7840_dump_serial_port(port, mos7840_port);
2385 mos7840_set_port_private(port, mos7840_port);
2387 /* enable rx_disable bit in control register */
2388 status = mos7840_get_reg_sync(port,
2389 mos7840_port->ControlRegOffset, &Data);
2391 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status);
2394 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status);
2395 Data |= 0x08; /* setting driver done bit */
2396 Data |= 0x04; /* sp1_bit to have cts change reflect in
2399 /* Data |= 0x20; //rx_disable bit */
2400 status = mos7840_set_reg_sync(port,
2401 mos7840_port->ControlRegOffset, Data);
2403 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2406 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status);
2408 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2411 status = mos7840_set_reg_sync(port,
2412 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2414 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status);
2417 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status);
2420 status = mos7840_set_reg_sync(port,
2421 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2423 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status);
2426 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status);
2429 status = mos7840_set_reg_sync(port,
2430 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2432 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status);
2435 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status);
2437 /* write values in clkstart0x0 and clkmulti 0x20 */
2439 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data);
2441 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2444 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2447 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data);
2449 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
2452 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
2454 /* write value 0x0 to scratchpad register */
2456 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data);
2458 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
2461 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status);
2463 /* Zero Length flag register */
2464 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) {
2466 status = mos7840_set_reg_sync(port,
2468 ((__u16)mos7840_port->port_num)), Data);
2469 dev_dbg(&port->dev, "ZLIP offset %x\n",
2470 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
2472 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status);
2475 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status);
2478 status = mos7840_set_reg_sync(port,
2480 ((__u16)mos7840_port->port_num) - 0x1), Data);
2481 dev_dbg(&port->dev, "ZLIP offset %x\n",
2482 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
2484 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status);
2487 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status);
2490 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2491 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2492 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2494 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2495 !mos7840_port->dr) {
2500 mos7840_port->has_led = false;
2502 /* Initialize LED timers */
2503 if (device_type == MOSCHIP_DEVICE_ID_7810) {
2504 mos7840_port->has_led = true;
2506 init_timer(&mos7840_port->led_timer1);
2507 mos7840_port->led_timer1.function = mos7840_led_off;
2508 mos7840_port->led_timer1.expires =
2509 jiffies + msecs_to_jiffies(LED_ON_MS);
2510 mos7840_port->led_timer1.data = (unsigned long)mos7840_port;
2512 init_timer(&mos7840_port->led_timer2);
2513 mos7840_port->led_timer2.function = mos7840_led_flag_off;
2514 mos7840_port->led_timer2.expires =
2515 jiffies + msecs_to_jiffies(LED_OFF_MS);
2516 mos7840_port->led_timer2.data = (unsigned long)mos7840_port;
2518 mos7840_port->led_flag = false;
2521 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2524 if (pnum == serial->num_ports - 1) {
2525 /* Zero Length flag enable */
2527 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2529 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
2532 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status);
2534 /* setting configuration feature to one */
2535 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2536 0x03, 0x00, 0x01, 0x00, NULL, 0x00,
2541 kfree(mos7840_port->dr);
2542 kfree(mos7840_port->ctrl_buf);
2543 usb_free_urb(mos7840_port->control_urb);
2544 kfree(mos7840_port);
2549 static int mos7840_port_remove(struct usb_serial_port *port)
2551 struct moschip_port *mos7840_port;
2553 mos7840_port = mos7840_get_port_private(port);
2555 if (mos7840_port->has_led) {
2557 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2559 del_timer_sync(&mos7840_port->led_timer1);
2560 del_timer_sync(&mos7840_port->led_timer2);
2562 usb_kill_urb(mos7840_port->control_urb);
2563 usb_free_urb(mos7840_port->control_urb);
2564 kfree(mos7840_port->ctrl_buf);
2565 kfree(mos7840_port->dr);
2566 kfree(mos7840_port);
2571 static struct usb_serial_driver moschip7840_4port_device = {
2573 .owner = THIS_MODULE,
2576 .description = DRIVER_DESC,
2577 .id_table = id_table,
2579 .open = mos7840_open,
2580 .close = mos7840_close,
2581 .write = mos7840_write,
2582 .write_room = mos7840_write_room,
2583 .chars_in_buffer = mos7840_chars_in_buffer,
2584 .throttle = mos7840_throttle,
2585 .unthrottle = mos7840_unthrottle,
2586 .calc_num_ports = mos7840_calc_num_ports,
2587 #ifdef MCSSerialProbe
2588 .probe = mos7840_serial_probe,
2590 .ioctl = mos7840_ioctl,
2591 .set_termios = mos7840_set_termios,
2592 .break_ctl = mos7840_break,
2593 .tiocmget = mos7840_tiocmget,
2594 .tiocmset = mos7840_tiocmset,
2595 .get_icount = mos7840_get_icount,
2596 .port_probe = mos7840_port_probe,
2597 .port_remove = mos7840_port_remove,
2598 .read_bulk_callback = mos7840_bulk_in_callback,
2599 .read_int_callback = mos7840_interrupt_callback,
2602 static struct usb_serial_driver * const serial_drivers[] = {
2603 &moschip7840_4port_device, NULL
2606 module_usb_serial_driver(serial_drivers, id_table);
2608 MODULE_DESCRIPTION(DRIVER_DESC);
2609 MODULE_LICENSE("GPL");