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
187 MOS7840_FLAG_CTRL_BUSY,
188 MOS7840_FLAG_LED_BUSY,
191 static const struct usb_device_id id_table[] = {
192 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
193 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
194 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)},
195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
205 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
206 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
207 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
208 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
209 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
210 {} /* terminating entry */
212 MODULE_DEVICE_TABLE(usb, id_table);
214 /* This structure holds all of the local port information */
216 struct moschip_port {
217 int port_num; /*Actual port number in the device(1,2,etc) */
218 struct urb *write_urb; /* write URB for this port */
219 struct urb *read_urb; /* read URB for this port */
220 __u8 shadowLCR; /* last LCR value received */
221 __u8 shadowMCR; /* last MCR value received */
224 struct usb_serial_port *port; /* loop back to the owner of this object */
228 __u8 ControlRegOffset;
230 /* for processing control URBS in interrupt context */
231 struct urb *control_urb;
232 struct usb_ctrlrequest *dr;
236 spinlock_t pool_lock;
237 struct urb *write_urb_pool[NUM_URBS];
241 /* For device(s) with LED indicator */
243 struct timer_list led_timer1; /* Timer for LED on */
244 struct timer_list led_timer2; /* Timer for LED off */
246 struct usb_ctrlrequest *led_dr;
252 * mos7840_set_reg_sync
253 * To set the Control register by calling usb_fill_control_urb function
254 * by passing usb_sndctrlpipe function as parameter.
257 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
260 struct usb_device *dev = port->serial->dev;
262 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
264 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
265 MCS_WR_RTYPE, val, reg, NULL, 0,
270 * mos7840_get_reg_sync
271 * To set the Uart register by calling usb_fill_control_urb function by
272 * passing usb_rcvctrlpipe function as parameter.
275 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
278 struct usb_device *dev = port->serial->dev;
282 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
286 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
287 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
290 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val);
297 * mos7840_set_uart_reg
298 * To set the Uart register by calling usb_fill_control_urb function by
299 * passing usb_sndctrlpipe function as parameter.
302 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
306 struct usb_device *dev = port->serial->dev;
308 /* For the UART control registers, the application number need
310 if (port->serial->num_ports == 4) {
311 val |= ((__u16)port->port_number + 1) << 8;
313 if (port->port_number == 0) {
314 val |= ((__u16)port->port_number + 1) << 8;
316 val |= ((__u16)port->port_number + 2) << 8;
319 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val);
320 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
321 MCS_WR_RTYPE, val, reg, NULL, 0,
327 * mos7840_get_uart_reg
328 * To set the Control register by calling usb_fill_control_urb function
329 * by passing usb_rcvctrlpipe function as parameter.
331 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
334 struct usb_device *dev = port->serial->dev;
339 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
343 /* Wval is same as application number */
344 if (port->serial->num_ports == 4) {
345 Wval = ((__u16)port->port_number + 1) << 8;
347 if (port->port_number == 0) {
348 Wval = ((__u16)port->port_number + 1) << 8;
350 Wval = ((__u16)port->port_number + 2) << 8;
353 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval);
354 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
355 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
363 static void mos7840_dump_serial_port(struct usb_serial_port *port,
364 struct moschip_port *mos7840_port)
367 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
368 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset);
369 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset);
373 /************************************************************************/
374 /************************************************************************/
375 /* I N T E R F A C E F U N C T I O N S */
376 /* I N T E R F A C E F U N C T I O N S */
377 /************************************************************************/
378 /************************************************************************/
380 static inline void mos7840_set_port_private(struct usb_serial_port *port,
381 struct moschip_port *data)
383 usb_set_serial_port_data(port, (void *)data);
386 static inline struct moschip_port *mos7840_get_port_private(struct
390 return (struct moschip_port *)usb_get_serial_port_data(port);
393 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
395 struct moschip_port *mos7840_port;
396 struct async_icount *icount;
399 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
401 icount = &mos7840_port->port->icount;
403 /* update input line counters */
404 if (new_msr & MOS_MSR_DELTA_CTS)
406 if (new_msr & MOS_MSR_DELTA_DSR)
408 if (new_msr & MOS_MSR_DELTA_CD)
410 if (new_msr & MOS_MSR_DELTA_RI)
413 wake_up_interruptible(&port->port->port.delta_msr_wait);
417 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
419 struct async_icount *icount;
421 if (new_lsr & SERIAL_LSR_BI) {
423 * Parity and Framing errors only count if they
424 * occur exclusive of a break being
427 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
430 /* update input line counters */
431 icount = &port->port->icount;
432 if (new_lsr & SERIAL_LSR_BI)
434 if (new_lsr & SERIAL_LSR_OE)
436 if (new_lsr & SERIAL_LSR_PE)
438 if (new_lsr & SERIAL_LSR_FE)
442 /************************************************************************/
443 /************************************************************************/
444 /* U S B C A L L B A C K F U N C T I O N S */
445 /* U S B C A L L B A C K F U N C T I O N S */
446 /************************************************************************/
447 /************************************************************************/
449 static void mos7840_control_callback(struct urb *urb)
452 struct moschip_port *mos7840_port;
453 struct device *dev = &urb->dev->dev;
455 int status = urb->status;
457 mos7840_port = urb->context;
466 /* this urb is terminated, clean up */
467 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
470 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
474 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length);
475 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__,
476 mos7840_port->MsrLsr, mos7840_port->port_num);
477 data = urb->transfer_buffer;
478 regval = (__u8) data[0];
479 dev_dbg(dev, "%s data is %x\n", __func__, regval);
480 if (mos7840_port->MsrLsr == 0)
481 mos7840_handle_new_msr(mos7840_port, regval);
482 else if (mos7840_port->MsrLsr == 1)
483 mos7840_handle_new_lsr(mos7840_port, regval);
485 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mos7840_port->flags);
488 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
491 struct usb_device *dev = mcs->port->serial->dev;
492 struct usb_ctrlrequest *dr = mcs->dr;
493 unsigned char *buffer = mcs->ctrl_buf;
496 if (test_and_set_bit_lock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags))
499 dr->bRequestType = MCS_RD_RTYPE;
500 dr->bRequest = MCS_RDREQ;
501 dr->wValue = cpu_to_le16(Wval); /* 0 */
502 dr->wIndex = cpu_to_le16(reg);
503 dr->wLength = cpu_to_le16(2);
505 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
506 (unsigned char *)dr, buffer, 2,
507 mos7840_control_callback, mcs);
508 mcs->control_urb->transfer_buffer_length = 2;
509 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
511 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags);
516 static void mos7840_set_led_callback(struct urb *urb)
518 switch (urb->status) {
525 /* This urb is terminated, clean up */
526 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d",
527 __func__, urb->status);
530 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d",
531 __func__, urb->status);
535 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
538 struct usb_device *dev = mcs->port->serial->dev;
539 struct usb_ctrlrequest *dr = mcs->led_dr;
541 dr->bRequestType = MCS_WR_RTYPE;
542 dr->bRequest = MCS_WRREQ;
543 dr->wValue = cpu_to_le16(wval);
544 dr->wIndex = cpu_to_le16(reg);
545 dr->wLength = cpu_to_le16(0);
547 usb_fill_control_urb(mcs->led_urb, dev, usb_sndctrlpipe(dev, 0),
548 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
550 usb_submit_urb(mcs->led_urb, GFP_ATOMIC);
553 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
556 struct usb_device *dev = port->serial->dev;
558 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
559 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
562 static void mos7840_led_off(unsigned long arg)
564 struct moschip_port *mcs = (struct moschip_port *) arg;
567 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
568 mod_timer(&mcs->led_timer2,
569 jiffies + msecs_to_jiffies(LED_OFF_MS));
572 static void mos7840_led_flag_off(unsigned long arg)
574 struct moschip_port *mcs = (struct moschip_port *) arg;
576 clear_bit_unlock(MOS7840_FLAG_LED_BUSY, &mcs->flags);
579 static void mos7840_led_activity(struct usb_serial_port *port)
581 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
583 if (test_and_set_bit_lock(MOS7840_FLAG_LED_BUSY, &mos7840_port->flags))
586 mos7840_set_led_async(mos7840_port, 0x0301, MODEM_CONTROL_REGISTER);
587 mod_timer(&mos7840_port->led_timer1,
588 jiffies + msecs_to_jiffies(LED_ON_MS));
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]);
652 wval = ((__u16)serial->port[i]->port_number + 1) << 8;
653 if (mos7840_port->open) {
655 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i);
657 switch (sp[i] & 0x0f) {
659 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i);
660 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n");
661 mos7840_port->MsrLsr = 1;
662 wreg = LINE_STATUS_REGISTER;
665 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i);
666 mos7840_port->MsrLsr = 0;
667 wreg = MODEM_STATUS_REGISTER;
670 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
675 /* the completion handler for the control urb will resubmit */
678 result = usb_submit_urb(urb, GFP_ATOMIC);
680 dev_err(&urb->dev->dev,
681 "%s - Error %d submitting interrupt urb\n",
686 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
687 const char *function)
690 pr_debug("%s - port == NULL\n", function);
694 pr_debug("%s - port->serial == NULL\n", function);
701 /* Inline functions to check the sanity of a pointer that is passed to us */
702 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
703 const char *function)
706 pr_debug("%s - serial == NULL\n", function);
710 pr_debug("%s - serial->type == NULL!\n", function);
717 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
718 const char *function)
720 /* if no port was specified, or it fails a paranoia check */
722 mos7840_port_paranoia_check(port, function) ||
723 mos7840_serial_paranoia_check(port->serial, function)) {
724 /* then say that we don't have a valid usb_serial thing,
725 * which will end up genrating -ENODEV return values */
732 /*****************************************************************************
733 * mos7840_bulk_in_callback
734 * this is the callback function for when we have received data on the
736 *****************************************************************************/
738 static void mos7840_bulk_in_callback(struct urb *urb)
742 struct usb_serial *serial;
743 struct usb_serial_port *port;
744 struct moschip_port *mos7840_port;
745 int status = urb->status;
747 mos7840_port = urb->context;
752 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
753 mos7840_port->read_urb_busy = false;
757 port = mos7840_port->port;
758 if (mos7840_port_paranoia_check(port, __func__)) {
759 mos7840_port->read_urb_busy = false;
763 serial = mos7840_get_usb_serial(port, __func__);
765 mos7840_port->read_urb_busy = false;
769 data = urb->transfer_buffer;
770 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
772 if (urb->actual_length) {
773 struct tty_port *tport = &mos7840_port->port->port;
774 tty_insert_flip_string(tport, data, urb->actual_length);
775 tty_flip_buffer_push(tport);
776 port->icount.rx += urb->actual_length;
777 dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx);
780 if (!mos7840_port->read_urb) {
781 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n");
782 mos7840_port->read_urb_busy = false;
786 if (mos7840_port->has_led)
787 mos7840_led_activity(port);
789 mos7840_port->read_urb_busy = true;
790 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
793 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
794 mos7840_port->read_urb_busy = false;
798 /*****************************************************************************
799 * mos7840_bulk_out_data_callback
800 * this is the callback function for when we have finished sending
801 * serial data on the bulk out endpoint.
802 *****************************************************************************/
804 static void mos7840_bulk_out_data_callback(struct urb *urb)
806 struct moschip_port *mos7840_port;
807 struct usb_serial_port *port;
808 int status = urb->status;
811 mos7840_port = urb->context;
812 port = mos7840_port->port;
813 spin_lock(&mos7840_port->pool_lock);
814 for (i = 0; i < NUM_URBS; i++) {
815 if (urb == mos7840_port->write_urb_pool[i]) {
816 mos7840_port->busy[i] = 0;
820 spin_unlock(&mos7840_port->pool_lock);
823 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);
827 if (mos7840_port_paranoia_check(port, __func__))
830 if (mos7840_port->open)
831 tty_port_tty_wakeup(&port->port);
835 /************************************************************************/
836 /* 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 */
837 /************************************************************************/
839 /*****************************************************************************
841 * this function is called by the tty driver when a port is opened
842 * If successful, we return 0
843 * Otherwise we return a negative error number.
844 *****************************************************************************/
846 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
850 struct usb_serial *serial;
854 struct moschip_port *mos7840_port;
855 struct moschip_port *port0;
857 if (mos7840_port_paranoia_check(port, __func__))
860 serial = port->serial;
862 if (mos7840_serial_paranoia_check(serial, __func__))
865 mos7840_port = mos7840_get_port_private(port);
866 port0 = mos7840_get_port_private(serial->port[0]);
868 if (mos7840_port == NULL || port0 == NULL)
871 usb_clear_halt(serial->dev, port->write_urb->pipe);
872 usb_clear_halt(serial->dev, port->read_urb->pipe);
875 /* Initialising the write urb pool */
876 for (j = 0; j < NUM_URBS; ++j) {
877 urb = usb_alloc_urb(0, GFP_KERNEL);
878 mos7840_port->write_urb_pool[j] = urb;
882 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
884 if (!urb->transfer_buffer) {
886 mos7840_port->write_urb_pool[j] = NULL;
891 /*****************************************************************************
892 * Initialize MCS7840 -- Write Init values to corresponding Registers
900 * 0x08 : SP1/2 Control Reg
901 *****************************************************************************/
903 /* NEED to check the following Block */
906 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
908 dev_dbg(&port->dev, "Reading Spreg failed\n");
912 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
914 dev_dbg(&port->dev, "writing Spreg failed\n");
919 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
921 dev_dbg(&port->dev, "writing Spreg failed\n");
924 /* End of block to be checked */
927 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
930 dev_dbg(&port->dev, "Reading Controlreg failed\n");
933 Data |= 0x08; /* Driver done bit */
934 Data |= 0x20; /* rx_disable */
935 status = mos7840_set_reg_sync(port,
936 mos7840_port->ControlRegOffset, Data);
938 dev_dbg(&port->dev, "writing Controlreg failed\n");
941 /* do register settings here */
942 /* Set all regs to the device default values. */
943 /***********************************
944 * First Disable all interrupts.
945 ***********************************/
947 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
949 dev_dbg(&port->dev, "disabling interrupts failed\n");
952 /* Set FIFO_CONTROL_REGISTER to the default value */
954 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
956 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
961 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
963 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
968 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
969 mos7840_port->shadowLCR = Data;
972 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
973 mos7840_port->shadowMCR = Data;
976 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
977 mos7840_port->shadowLCR = Data;
979 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
980 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
983 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
986 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
989 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
991 Data = Data & ~SERIAL_LCR_DLAB;
992 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
993 mos7840_port->shadowLCR = Data;
995 /* clearing Bulkin and Bulkout Fifo */
997 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1000 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1002 Data = Data & ~0x0c;
1003 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1004 /* Finally enable all interrupts */
1006 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1008 /* clearing rx_disable */
1010 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1012 Data = Data & ~0x20;
1013 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1018 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1021 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1024 /* Check to see if we've set up our endpoint info yet *
1025 * (can't set it up in mos7840_startup as the structures *
1026 * were not set up at that time.) */
1027 if (port0->open_ports == 1) {
1028 if (serial->port[0]->interrupt_in_buffer == NULL) {
1029 /* set up interrupt urb */
1030 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1032 usb_rcvintpipe(serial->dev,
1033 serial->port[0]->interrupt_in_endpointAddress),
1034 serial->port[0]->interrupt_in_buffer,
1035 serial->port[0]->interrupt_in_urb->
1036 transfer_buffer_length,
1037 mos7840_interrupt_callback,
1039 serial->port[0]->interrupt_in_urb->interval);
1041 /* start interrupt read for mos7840 *
1042 * will continue as long as mos7840 is connected */
1045 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1048 dev_err(&port->dev, "%s - Error %d submitting "
1049 "interrupt urb\n", __func__, response);
1056 /* see if we've set up our endpoint info yet *
1057 * (can't set it up in mos7840_startup as the *
1058 * structures were not set up at that time.) */
1060 dev_dbg(&port->dev, "port number is %d\n", port->port_number);
1061 dev_dbg(&port->dev, "minor number is %d\n", port->minor);
1062 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
1063 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
1064 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
1065 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num);
1066 mos7840_port->read_urb = port->read_urb;
1068 /* set up our bulk in urb */
1069 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
1070 usb_fill_bulk_urb(mos7840_port->read_urb,
1072 usb_rcvbulkpipe(serial->dev,
1073 (port->bulk_in_endpointAddress) + 2),
1074 port->bulk_in_buffer,
1075 mos7840_port->read_urb->transfer_buffer_length,
1076 mos7840_bulk_in_callback, mos7840_port);
1078 usb_fill_bulk_urb(mos7840_port->read_urb,
1080 usb_rcvbulkpipe(serial->dev,
1081 port->bulk_in_endpointAddress),
1082 port->bulk_in_buffer,
1083 mos7840_port->read_urb->transfer_buffer_length,
1084 mos7840_bulk_in_callback, mos7840_port);
1087 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress);
1088 mos7840_port->read_urb_busy = true;
1089 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1091 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1092 __func__, response);
1093 mos7840_port->read_urb_busy = false;
1096 /* initialize our port settings */
1097 /* Must set to enable ints! */
1098 mos7840_port->shadowMCR = MCR_MASTER_IE;
1099 /* send a open port command */
1100 mos7840_port->open = 1;
1101 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1105 for (j = 0; j < NUM_URBS; ++j) {
1106 urb = mos7840_port->write_urb_pool[j];
1109 kfree(urb->transfer_buffer);
1115 /*****************************************************************************
1116 * mos7840_chars_in_buffer
1117 * this function is called by the tty driver when it wants to know how many
1118 * bytes of data we currently have outstanding in the port (data that has
1119 * been written, but hasn't made it out the port yet)
1120 * If successful, we return the number of bytes left to be written in the
1122 * Otherwise we return zero.
1123 *****************************************************************************/
1125 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1127 struct usb_serial_port *port = tty->driver_data;
1130 unsigned long flags;
1131 struct moschip_port *mos7840_port;
1133 if (mos7840_port_paranoia_check(port, __func__))
1136 mos7840_port = mos7840_get_port_private(port);
1137 if (mos7840_port == NULL)
1140 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1141 for (i = 0; i < NUM_URBS; ++i) {
1142 if (mos7840_port->busy[i]) {
1143 struct urb *urb = mos7840_port->write_urb_pool[i];
1144 chars += urb->transfer_buffer_length;
1147 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1148 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
1153 /*****************************************************************************
1155 * this function is called by the tty driver when a port is closed
1156 *****************************************************************************/
1158 static void mos7840_close(struct usb_serial_port *port)
1160 struct usb_serial *serial;
1161 struct moschip_port *mos7840_port;
1162 struct moschip_port *port0;
1166 if (mos7840_port_paranoia_check(port, __func__))
1169 serial = mos7840_get_usb_serial(port, __func__);
1173 mos7840_port = mos7840_get_port_private(port);
1174 port0 = mos7840_get_port_private(serial->port[0]);
1176 if (mos7840_port == NULL || port0 == NULL)
1179 for (j = 0; j < NUM_URBS; ++j)
1180 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1182 /* Freeing Write URBs */
1183 for (j = 0; j < NUM_URBS; ++j) {
1184 if (mos7840_port->write_urb_pool[j]) {
1185 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1186 kfree(mos7840_port->write_urb_pool[j]->
1189 usb_free_urb(mos7840_port->write_urb_pool[j]);
1193 usb_kill_urb(mos7840_port->write_urb);
1194 usb_kill_urb(mos7840_port->read_urb);
1195 mos7840_port->read_urb_busy = false;
1197 port0->open_ports--;
1198 dev_dbg(&port->dev, "%s in close%d\n", __func__, port0->open_ports);
1199 if (port0->open_ports == 0) {
1200 if (serial->port[0]->interrupt_in_urb) {
1201 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n");
1202 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1206 if (mos7840_port->write_urb) {
1207 /* if this urb had a transfer buffer already (old tx) free it */
1208 kfree(mos7840_port->write_urb->transfer_buffer);
1209 usb_free_urb(mos7840_port->write_urb);
1213 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1216 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1218 mos7840_port->open = 0;
1221 /*****************************************************************************
1223 * this function sends a break to the port
1224 *****************************************************************************/
1225 static void mos7840_break(struct tty_struct *tty, int break_state)
1227 struct usb_serial_port *port = tty->driver_data;
1229 struct usb_serial *serial;
1230 struct moschip_port *mos7840_port;
1232 if (mos7840_port_paranoia_check(port, __func__))
1235 serial = mos7840_get_usb_serial(port, __func__);
1239 mos7840_port = mos7840_get_port_private(port);
1241 if (mos7840_port == NULL)
1244 if (break_state == -1)
1245 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1247 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1249 /* FIXME: no locking on shadowLCR anywhere in driver */
1250 mos7840_port->shadowLCR = data;
1251 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1252 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1253 mos7840_port->shadowLCR);
1256 /*****************************************************************************
1257 * mos7840_write_room
1258 * this function is called by the tty driver when it wants to know how many
1259 * bytes of data we can accept for a specific port.
1260 * If successful, we return the amount of room that we have for this port
1261 * Otherwise we return a negative error number.
1262 *****************************************************************************/
1264 static int mos7840_write_room(struct tty_struct *tty)
1266 struct usb_serial_port *port = tty->driver_data;
1269 unsigned long flags;
1270 struct moschip_port *mos7840_port;
1272 if (mos7840_port_paranoia_check(port, __func__))
1275 mos7840_port = mos7840_get_port_private(port);
1276 if (mos7840_port == NULL)
1279 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1280 for (i = 0; i < NUM_URBS; ++i) {
1281 if (!mos7840_port->busy[i])
1282 room += URB_TRANSFER_BUFFER_SIZE;
1284 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1286 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1287 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room);
1292 /*****************************************************************************
1294 * this function is called by the tty driver when data should be written to
1296 * If successful, we return the number of bytes written, otherwise we
1297 * return a negative error number.
1298 *****************************************************************************/
1300 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1301 const unsigned char *data, int count)
1307 unsigned long flags;
1309 struct moschip_port *mos7840_port;
1310 struct usb_serial *serial;
1313 const unsigned char *current_position = data;
1314 unsigned char *data1;
1318 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1319 mos7840_port->shadowLCR = Data;
1320 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data);
1321 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1324 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1325 /* mos7840_port->shadowLCR=Data;//Need to add later */
1327 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1328 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1331 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1333 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1334 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data);
1337 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1338 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data);
1340 Data = Data & ~SERIAL_LCR_DLAB;
1341 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1342 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1345 if (mos7840_port_paranoia_check(port, __func__))
1348 serial = port->serial;
1349 if (mos7840_serial_paranoia_check(serial, __func__))
1352 mos7840_port = mos7840_get_port_private(port);
1353 if (mos7840_port == NULL)
1356 /* try to find a free urb in the list */
1359 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1360 for (i = 0; i < NUM_URBS; ++i) {
1361 if (!mos7840_port->busy[i]) {
1362 mos7840_port->busy[i] = 1;
1363 urb = mos7840_port->write_urb_pool[i];
1364 dev_dbg(&port->dev, "URB:%d\n", i);
1368 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1371 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
1375 if (urb->transfer_buffer == NULL) {
1376 urb->transfer_buffer =
1377 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1378 if (!urb->transfer_buffer)
1381 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1383 memcpy(urb->transfer_buffer, current_position, transfer_size);
1385 /* fill urb with data and submit */
1386 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
1387 usb_fill_bulk_urb(urb,
1389 usb_sndbulkpipe(serial->dev,
1390 (port->bulk_out_endpointAddress) + 2),
1391 urb->transfer_buffer,
1393 mos7840_bulk_out_data_callback, mos7840_port);
1395 usb_fill_bulk_urb(urb,
1397 usb_sndbulkpipe(serial->dev,
1398 port->bulk_out_endpointAddress),
1399 urb->transfer_buffer,
1401 mos7840_bulk_out_data_callback, mos7840_port);
1404 data1 = urb->transfer_buffer;
1405 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
1407 if (mos7840_port->has_led)
1408 mos7840_led_activity(port);
1410 /* send it down the pipe */
1411 status = usb_submit_urb(urb, GFP_ATOMIC);
1414 mos7840_port->busy[i] = 0;
1415 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
1416 "with status = %d\n", __func__, status);
1417 bytes_sent = status;
1420 bytes_sent = transfer_size;
1421 port->icount.tx += transfer_size;
1422 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx);
1428 /*****************************************************************************
1430 * this function is called by the tty driver when it wants to stop the data
1431 * being read from the port.
1432 *****************************************************************************/
1434 static void mos7840_throttle(struct tty_struct *tty)
1436 struct usb_serial_port *port = tty->driver_data;
1437 struct moschip_port *mos7840_port;
1440 if (mos7840_port_paranoia_check(port, __func__))
1443 mos7840_port = mos7840_get_port_private(port);
1445 if (mos7840_port == NULL)
1448 if (!mos7840_port->open) {
1449 dev_dbg(&port->dev, "%s", "port not opened\n");
1453 /* if we are implementing XON/XOFF, send the stop character */
1455 unsigned char stop_char = STOP_CHAR(tty);
1456 status = mos7840_write(tty, port, &stop_char, 1);
1460 /* if we are implementing RTS/CTS, toggle that line */
1461 if (tty->termios.c_cflag & CRTSCTS) {
1462 mos7840_port->shadowMCR &= ~MCR_RTS;
1463 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1464 mos7840_port->shadowMCR);
1470 /*****************************************************************************
1471 * mos7840_unthrottle
1472 * this function is called by the tty driver when it wants to resume
1473 * the data being read from the port (called after mos7840_throttle is
1475 *****************************************************************************/
1476 static void mos7840_unthrottle(struct tty_struct *tty)
1478 struct usb_serial_port *port = tty->driver_data;
1480 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1482 if (mos7840_port_paranoia_check(port, __func__))
1485 if (mos7840_port == NULL)
1488 if (!mos7840_port->open) {
1489 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1493 /* if we are implementing XON/XOFF, send the start character */
1495 unsigned char start_char = START_CHAR(tty);
1496 status = mos7840_write(tty, port, &start_char, 1);
1501 /* if we are implementing RTS/CTS, toggle that line */
1502 if (tty->termios.c_cflag & CRTSCTS) {
1503 mos7840_port->shadowMCR |= MCR_RTS;
1504 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1505 mos7840_port->shadowMCR);
1511 static int mos7840_tiocmget(struct tty_struct *tty)
1513 struct usb_serial_port *port = tty->driver_data;
1514 struct moschip_port *mos7840_port;
1515 unsigned int result;
1519 mos7840_port = mos7840_get_port_private(port);
1521 if (mos7840_port == NULL)
1524 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1527 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1530 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1531 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1532 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1533 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1534 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1535 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1536 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1538 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
1543 static int mos7840_tiocmset(struct tty_struct *tty,
1544 unsigned int set, unsigned int clear)
1546 struct usb_serial_port *port = tty->driver_data;
1547 struct moschip_port *mos7840_port;
1551 mos7840_port = mos7840_get_port_private(port);
1553 if (mos7840_port == NULL)
1556 /* FIXME: What locks the port registers ? */
1557 mcr = mos7840_port->shadowMCR;
1558 if (clear & TIOCM_RTS)
1560 if (clear & TIOCM_DTR)
1562 if (clear & TIOCM_LOOP)
1563 mcr &= ~MCR_LOOPBACK;
1565 if (set & TIOCM_RTS)
1567 if (set & TIOCM_DTR)
1569 if (set & TIOCM_LOOP)
1570 mcr |= MCR_LOOPBACK;
1572 mos7840_port->shadowMCR = mcr;
1574 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1576 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n");
1583 /*****************************************************************************
1584 * mos7840_calc_baud_rate_divisor
1585 * this function calculates the proper baud rate divisor for the specified
1587 *****************************************************************************/
1588 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port,
1589 int baudRate, int *divisor,
1592 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate);
1594 if (baudRate <= 115200) {
1595 *divisor = 115200 / baudRate;
1598 if ((baudRate > 115200) && (baudRate <= 230400)) {
1599 *divisor = 230400 / baudRate;
1600 *clk_sel_val = 0x10;
1601 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1602 *divisor = 403200 / baudRate;
1603 *clk_sel_val = 0x20;
1604 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1605 *divisor = 460800 / baudRate;
1606 *clk_sel_val = 0x30;
1607 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1608 *divisor = 806400 / baudRate;
1609 *clk_sel_val = 0x40;
1610 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1611 *divisor = 921600 / baudRate;
1612 *clk_sel_val = 0x50;
1613 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1614 *divisor = 1572864 / baudRate;
1615 *clk_sel_val = 0x60;
1616 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1617 *divisor = 3145728 / baudRate;
1618 *clk_sel_val = 0x70;
1624 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1625 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1626 *divisor = mos7840_divisor_table[i].Divisor;
1631 /* After trying for all the standard baud rates *
1632 * Try calculating the divisor for this baud rate */
1634 if (baudrate > 75 && baudrate < 230400) {
1635 /* get the divisor */
1636 custom = (__u16) (230400L / baudrate);
1638 /* Check for round off */
1639 round1 = (__u16) (2304000L / baudrate);
1640 round = (__u16) (round1 - (custom * 10));
1645 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom);
1649 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n");
1654 /*****************************************************************************
1655 * mos7840_send_cmd_write_baud_rate
1656 * this function sends the proper command to change the baud rate of the
1658 *****************************************************************************/
1660 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1666 unsigned char number;
1668 struct usb_serial_port *port;
1670 if (mos7840_port == NULL)
1673 port = mos7840_port->port;
1674 if (mos7840_port_paranoia_check(port, __func__))
1677 if (mos7840_serial_paranoia_check(port->serial, __func__))
1680 number = mos7840_port->port->port_number;
1682 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate);
1683 /* reset clk_uart_sel in spregOffset */
1684 if (baudRate > 115200) {
1685 #ifdef HW_flow_control
1686 /* NOTE: need to see the pther register to modify */
1687 /* setting h/w flow control bit to 1 */
1689 mos7840_port->shadowMCR = Data;
1690 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1693 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1699 #ifdef HW_flow_control
1700 /* setting h/w flow control bit to 0 */
1702 mos7840_port->shadowMCR = Data;
1703 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1706 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1713 if (1) { /* baudRate <= 115200) */
1716 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor,
1718 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1721 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n");
1724 Data = (Data & 0x8f) | clk_sel_val;
1725 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1728 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1731 /* Calculate the Divisor */
1734 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1737 /* Enable access to divisor latch */
1738 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1739 mos7840_port->shadowLCR = Data;
1740 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1742 /* Write the divisor */
1743 Data = (unsigned char)(divisor & 0xff);
1744 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data);
1745 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1747 Data = (unsigned char)((divisor & 0xff00) >> 8);
1748 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data);
1749 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1751 /* Disable access to divisor latch */
1752 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1753 mos7840_port->shadowLCR = Data;
1754 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1760 /*****************************************************************************
1761 * mos7840_change_port_settings
1762 * This routine is called to set the UART on the device to match
1763 * the specified new settings.
1764 *****************************************************************************/
1766 static void mos7840_change_port_settings(struct tty_struct *tty,
1767 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1777 struct usb_serial_port *port;
1778 struct usb_serial *serial;
1780 if (mos7840_port == NULL)
1783 port = mos7840_port->port;
1785 if (mos7840_port_paranoia_check(port, __func__))
1788 if (mos7840_serial_paranoia_check(port->serial, __func__))
1791 serial = port->serial;
1793 if (!mos7840_port->open) {
1794 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1800 lParity = LCR_PAR_NONE;
1802 cflag = tty->termios.c_cflag;
1803 iflag = tty->termios.c_iflag;
1805 /* Change the number of bits */
1806 switch (cflag & CSIZE) {
1825 /* Change the Parity bit */
1826 if (cflag & PARENB) {
1827 if (cflag & PARODD) {
1828 lParity = LCR_PAR_ODD;
1829 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
1831 lParity = LCR_PAR_EVEN;
1832 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
1836 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
1840 lParity = lParity | 0x20;
1842 /* Change the Stop bit */
1843 if (cflag & CSTOPB) {
1845 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
1848 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
1851 /* Update the LCR with the correct value */
1852 mos7840_port->shadowLCR &=
1853 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1854 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1856 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
1857 mos7840_port->shadowLCR);
1858 /* Disable Interrupts */
1860 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1863 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1866 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1868 /* Send the updated LCR value to the mos7840 */
1869 Data = mos7840_port->shadowLCR;
1871 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1874 mos7840_port->shadowMCR = Data;
1875 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1877 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1879 /* set up the MCR register and send it to the mos7840 */
1881 mos7840_port->shadowMCR = MCR_MASTER_IE;
1883 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
1885 if (cflag & CRTSCTS)
1886 mos7840_port->shadowMCR |= (MCR_XON_ANY);
1888 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
1890 Data = mos7840_port->shadowMCR;
1891 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1893 /* Determine divisor based on baud rate */
1894 baud = tty_get_baud_rate(tty);
1897 /* pick a default, any default... */
1898 dev_dbg(&port->dev, "%s", "Picked default baud...\n");
1902 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
1903 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
1905 /* Enable Interrupts */
1907 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1909 if (mos7840_port->read_urb_busy == false) {
1910 mos7840_port->read_urb_busy = true;
1911 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
1913 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
1915 mos7840_port->read_urb_busy = false;
1918 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
1919 mos7840_port->shadowLCR);
1922 /*****************************************************************************
1923 * mos7840_set_termios
1924 * this function is called by the tty driver when it wants to change
1925 * the termios structure
1926 *****************************************************************************/
1928 static void mos7840_set_termios(struct tty_struct *tty,
1929 struct usb_serial_port *port,
1930 struct ktermios *old_termios)
1934 struct usb_serial *serial;
1935 struct moschip_port *mos7840_port;
1937 if (mos7840_port_paranoia_check(port, __func__))
1940 serial = port->serial;
1942 if (mos7840_serial_paranoia_check(serial, __func__))
1945 mos7840_port = mos7840_get_port_private(port);
1947 if (mos7840_port == NULL)
1950 if (!mos7840_port->open) {
1951 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1955 dev_dbg(&port->dev, "%s", "setting termios - \n");
1957 cflag = tty->termios.c_cflag;
1959 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
1960 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag));
1961 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
1962 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
1964 /* change the port settings to the new ones specified */
1966 mos7840_change_port_settings(tty, mos7840_port, old_termios);
1968 if (!mos7840_port->read_urb) {
1969 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n");
1973 if (mos7840_port->read_urb_busy == false) {
1974 mos7840_port->read_urb_busy = true;
1975 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
1977 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
1979 mos7840_port->read_urb_busy = false;
1984 /*****************************************************************************
1985 * mos7840_get_lsr_info - get line status register info
1987 * Purpose: Let user call ioctl() to get info when the UART physically
1988 * is emptied. On bus types like RS485, the transmitter must
1989 * release the bus after transmitting. This must be done when
1990 * the transmit shift register is empty, not be done when the
1991 * transmit holding register is empty. This functionality
1992 * allows an RS485 driver to be written in user space.
1993 *****************************************************************************/
1995 static int mos7840_get_lsr_info(struct tty_struct *tty,
1996 unsigned int __user *value)
1999 unsigned int result = 0;
2001 count = mos7840_chars_in_buffer(tty);
2003 result = TIOCSER_TEMT;
2005 if (copy_to_user(value, &result, sizeof(int)))
2010 /*****************************************************************************
2011 * mos7840_get_serial_info
2012 * function to get information about serial port
2013 *****************************************************************************/
2015 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2016 struct serial_struct __user *retinfo)
2018 struct serial_struct tmp;
2020 if (mos7840_port == NULL)
2026 memset(&tmp, 0, sizeof(tmp));
2028 tmp.type = PORT_16550A;
2029 tmp.line = mos7840_port->port->minor;
2030 tmp.port = mos7840_port->port->port_number;
2032 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2033 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2034 tmp.baud_base = 9600;
2035 tmp.close_delay = 5 * HZ;
2036 tmp.closing_wait = 30 * HZ;
2038 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2043 /*****************************************************************************
2045 * this function handles any ioctl calls to the driver
2046 *****************************************************************************/
2048 static int mos7840_ioctl(struct tty_struct *tty,
2049 unsigned int cmd, unsigned long arg)
2051 struct usb_serial_port *port = tty->driver_data;
2052 void __user *argp = (void __user *)arg;
2053 struct moschip_port *mos7840_port;
2055 if (mos7840_port_paranoia_check(port, __func__))
2058 mos7840_port = mos7840_get_port_private(port);
2060 if (mos7840_port == NULL)
2064 /* return number of bytes available */
2067 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
2068 return mos7840_get_lsr_info(tty, argp);
2071 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
2072 return mos7840_get_serial_info(mos7840_port, argp);
2075 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__);
2080 return -ENOIOCTLCMD;
2083 static int mos7810_check(struct usb_serial *serial)
2085 int i, pass_count = 0;
2087 __u16 data = 0, mcr_data = 0;
2088 __u16 test_pattern = 0x55AA;
2091 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
2093 return 0; /* failed to identify 7810 */
2095 /* Store MCR setting */
2096 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2097 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
2098 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2099 if (res == VENDOR_READ_LENGTH)
2102 for (i = 0; i < 16; i++) {
2103 /* Send the 1-bit test pattern out to MCS7810 test pin */
2104 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2105 MCS_WRREQ, MCS_WR_RTYPE,
2106 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
2107 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
2109 /* Read the test pattern back */
2110 res = usb_control_msg(serial->dev,
2111 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ,
2112 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
2113 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2114 if (res == VENDOR_READ_LENGTH)
2117 /* If this is a MCS7810 device, both test patterns must match */
2118 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
2124 /* Restore MCR setting */
2125 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
2126 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
2127 0, MOS_WDR_TIMEOUT);
2131 if (pass_count == 16)
2137 static int mos7840_probe(struct usb_serial *serial,
2138 const struct usb_device_id *id)
2140 u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
2144 if (product == MOSCHIP_DEVICE_ID_7810 ||
2145 product == MOSCHIP_DEVICE_ID_7820) {
2146 device_type = product;
2150 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
2154 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2155 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
2156 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2158 /* For a MCS7840 device GPIO0 must be set to 1 */
2160 device_type = MOSCHIP_DEVICE_ID_7840;
2161 else if (mos7810_check(serial))
2162 device_type = MOSCHIP_DEVICE_ID_7810;
2164 device_type = MOSCHIP_DEVICE_ID_7820;
2168 usb_set_serial_data(serial, (void *)(unsigned long)device_type);
2173 static int mos7840_calc_num_ports(struct usb_serial *serial)
2175 int device_type = (unsigned long)usb_get_serial_data(serial);
2176 int mos7840_num_ports;
2178 mos7840_num_ports = (device_type >> 4) & 0x000F;
2180 return mos7840_num_ports;
2183 static int mos7840_port_probe(struct usb_serial_port *port)
2185 struct usb_serial *serial = port->serial;
2186 int device_type = (unsigned long)usb_get_serial_data(serial);
2187 struct moschip_port *mos7840_port;
2192 /* we set up the pointers to the endpoints in the mos7840_open *
2193 * function, as the structures aren't created yet. */
2195 pnum = port->port_number;
2197 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum);
2198 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2202 /* Initialize all port interrupt end point to port 0 int
2203 * endpoint. Our device has only one interrupt end point
2204 * common to all port */
2206 mos7840_port->port = port;
2207 mos7840_set_port_private(port, mos7840_port);
2208 spin_lock_init(&mos7840_port->pool_lock);
2210 /* minor is not initialised until later by
2211 * usb-serial.c:get_free_serial() and cannot therefore be used
2212 * to index device instances */
2213 mos7840_port->port_num = pnum + 1;
2214 dev_dbg(&port->dev, "port->minor = %d\n", port->minor);
2215 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
2217 if (mos7840_port->port_num == 1) {
2218 mos7840_port->SpRegOffset = 0x0;
2219 mos7840_port->ControlRegOffset = 0x1;
2220 mos7840_port->DcrRegOffset = 0x4;
2221 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) {
2222 mos7840_port->SpRegOffset = 0x8;
2223 mos7840_port->ControlRegOffset = 0x9;
2224 mos7840_port->DcrRegOffset = 0x16;
2225 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) {
2226 mos7840_port->SpRegOffset = 0xa;
2227 mos7840_port->ControlRegOffset = 0xb;
2228 mos7840_port->DcrRegOffset = 0x19;
2229 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) {
2230 mos7840_port->SpRegOffset = 0xa;
2231 mos7840_port->ControlRegOffset = 0xb;
2232 mos7840_port->DcrRegOffset = 0x19;
2233 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) {
2234 mos7840_port->SpRegOffset = 0xc;
2235 mos7840_port->ControlRegOffset = 0xd;
2236 mos7840_port->DcrRegOffset = 0x1c;
2238 mos7840_dump_serial_port(port, mos7840_port);
2239 mos7840_set_port_private(port, mos7840_port);
2241 /* enable rx_disable bit in control register */
2242 status = mos7840_get_reg_sync(port,
2243 mos7840_port->ControlRegOffset, &Data);
2245 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status);
2248 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status);
2249 Data |= 0x08; /* setting driver done bit */
2250 Data |= 0x04; /* sp1_bit to have cts change reflect in
2253 /* Data |= 0x20; //rx_disable bit */
2254 status = mos7840_set_reg_sync(port,
2255 mos7840_port->ControlRegOffset, Data);
2257 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2260 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status);
2262 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2265 status = mos7840_set_reg_sync(port,
2266 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2268 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status);
2271 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status);
2274 status = mos7840_set_reg_sync(port,
2275 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2277 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status);
2280 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status);
2283 status = mos7840_set_reg_sync(port,
2284 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2286 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status);
2289 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status);
2291 /* write values in clkstart0x0 and clkmulti 0x20 */
2293 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data);
2295 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2298 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2301 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data);
2303 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
2306 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
2308 /* write value 0x0 to scratchpad register */
2310 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data);
2312 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
2315 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status);
2317 /* Zero Length flag register */
2318 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) {
2320 status = mos7840_set_reg_sync(port,
2322 ((__u16)mos7840_port->port_num)), Data);
2323 dev_dbg(&port->dev, "ZLIP offset %x\n",
2324 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
2326 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status);
2329 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status);
2332 status = mos7840_set_reg_sync(port,
2334 ((__u16)mos7840_port->port_num) - 0x1), Data);
2335 dev_dbg(&port->dev, "ZLIP offset %x\n",
2336 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
2338 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status);
2341 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status);
2344 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2345 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2346 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2348 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2349 !mos7840_port->dr) {
2354 mos7840_port->has_led = false;
2356 /* Initialize LED timers */
2357 if (device_type == MOSCHIP_DEVICE_ID_7810) {
2358 mos7840_port->has_led = true;
2360 mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL);
2361 mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr),
2363 if (!mos7840_port->led_urb || !mos7840_port->led_dr) {
2368 init_timer(&mos7840_port->led_timer1);
2369 mos7840_port->led_timer1.function = mos7840_led_off;
2370 mos7840_port->led_timer1.expires =
2371 jiffies + msecs_to_jiffies(LED_ON_MS);
2372 mos7840_port->led_timer1.data = (unsigned long)mos7840_port;
2374 init_timer(&mos7840_port->led_timer2);
2375 mos7840_port->led_timer2.function = mos7840_led_flag_off;
2376 mos7840_port->led_timer2.expires =
2377 jiffies + msecs_to_jiffies(LED_OFF_MS);
2378 mos7840_port->led_timer2.data = (unsigned long)mos7840_port;
2381 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2384 if (pnum == serial->num_ports - 1) {
2385 /* Zero Length flag enable */
2387 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2389 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
2392 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status);
2394 /* setting configuration feature to one */
2395 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2396 0x03, 0x00, 0x01, 0x00, NULL, 0x00,
2401 kfree(mos7840_port->led_dr);
2402 usb_free_urb(mos7840_port->led_urb);
2403 kfree(mos7840_port->dr);
2404 kfree(mos7840_port->ctrl_buf);
2405 usb_free_urb(mos7840_port->control_urb);
2406 kfree(mos7840_port);
2411 static int mos7840_port_remove(struct usb_serial_port *port)
2413 struct moschip_port *mos7840_port;
2415 mos7840_port = mos7840_get_port_private(port);
2417 if (mos7840_port->has_led) {
2419 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2421 del_timer_sync(&mos7840_port->led_timer1);
2422 del_timer_sync(&mos7840_port->led_timer2);
2424 usb_kill_urb(mos7840_port->led_urb);
2425 usb_free_urb(mos7840_port->led_urb);
2426 kfree(mos7840_port->led_dr);
2428 usb_kill_urb(mos7840_port->control_urb);
2429 usb_free_urb(mos7840_port->control_urb);
2430 kfree(mos7840_port->ctrl_buf);
2431 kfree(mos7840_port->dr);
2432 kfree(mos7840_port);
2437 static struct usb_serial_driver moschip7840_4port_device = {
2439 .owner = THIS_MODULE,
2442 .description = DRIVER_DESC,
2443 .id_table = id_table,
2445 .open = mos7840_open,
2446 .close = mos7840_close,
2447 .write = mos7840_write,
2448 .write_room = mos7840_write_room,
2449 .chars_in_buffer = mos7840_chars_in_buffer,
2450 .throttle = mos7840_throttle,
2451 .unthrottle = mos7840_unthrottle,
2452 .calc_num_ports = mos7840_calc_num_ports,
2453 .probe = mos7840_probe,
2454 .ioctl = mos7840_ioctl,
2455 .set_termios = mos7840_set_termios,
2456 .break_ctl = mos7840_break,
2457 .tiocmget = mos7840_tiocmget,
2458 .tiocmset = mos7840_tiocmset,
2459 .tiocmiwait = usb_serial_generic_tiocmiwait,
2460 .get_icount = usb_serial_generic_get_icount,
2461 .port_probe = mos7840_port_probe,
2462 .port_remove = mos7840_port_remove,
2463 .read_bulk_callback = mos7840_bulk_in_callback,
2464 .read_int_callback = mos7840_interrupt_callback,
2467 static struct usb_serial_driver * const serial_drivers[] = {
2468 &moschip7840_4port_device, NULL
2471 module_usb_serial_driver(serial_drivers, id_table);
2473 MODULE_DESCRIPTION(DRIVER_DESC);
2474 MODULE_LICENSE("GPL");