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/slab.h>
28 #include <linux/tty.h>
29 #include <linux/tty_driver.h>
30 #include <linux/tty_flip.h>
31 #include <linux/module.h>
32 #include <linux/serial.h>
33 #include <linux/usb.h>
34 #include <linux/usb/serial.h>
35 #include <linux/uaccess.h>
37 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
40 * 16C50 UART register defines
43 #define LCR_BITS_5 0x00 /* 5 bits/char */
44 #define LCR_BITS_6 0x01 /* 6 bits/char */
45 #define LCR_BITS_7 0x02 /* 7 bits/char */
46 #define LCR_BITS_8 0x03 /* 8 bits/char */
47 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
49 #define LCR_STOP_1 0x00 /* 1 stop bit */
50 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
51 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
52 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
54 #define LCR_PAR_NONE 0x00 /* No parity */
55 #define LCR_PAR_ODD 0x08 /* Odd parity */
56 #define LCR_PAR_EVEN 0x18 /* Even parity */
57 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
58 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
59 #define LCR_PAR_MASK 0x38 /* Mask for parity field */
61 #define LCR_SET_BREAK 0x40 /* Set Break condition */
62 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
64 #define MCR_DTR 0x01 /* Assert DTR */
65 #define MCR_RTS 0x02 /* Assert RTS */
66 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
67 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
68 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
69 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
71 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
72 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
73 #define MOS7840_MSR_RI 0x40 /* Current state of RI */
74 #define MOS7840_MSR_CD 0x80 /* Current state of CD */
77 * Defines used for sending commands to port
80 #define MOS_WDR_TIMEOUT 5000 /* default urb timeout */
82 #define MOS_PORT1 0x0200
83 #define MOS_PORT2 0x0300
84 #define MOS_VENREG 0x0000
85 #define MOS_MAX_PORT 0x02
86 #define MOS_WRITE 0x0E
90 #define MCS_RD_RTYPE 0xC0
91 #define MCS_WR_RTYPE 0x40
92 #define MCS_RDREQ 0x0D
93 #define MCS_WRREQ 0x0E
94 #define MCS_CTRL_TIMEOUT 500
95 #define VENDOR_READ_LENGTH (0x01)
97 #define MAX_NAME_LEN 64
99 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
100 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
102 /* For higher baud Rates use TIOCEXBAUD */
103 #define TIOCEXBAUD 0x5462
105 /* vendor id and device id defines */
107 /* The native mos7840/7820 component */
108 #define USB_VENDOR_ID_MOSCHIP 0x9710
109 #define MOSCHIP_DEVICE_ID_7840 0x7840
110 #define MOSCHIP_DEVICE_ID_7820 0x7820
111 #define MOSCHIP_DEVICE_ID_7810 0x7810
112 /* The native component can have its vendor/device id's overridden
113 * in vendor-specific implementations. Such devices can be handled
114 * by making a change here, in id_table.
116 #define USB_VENDOR_ID_BANDB 0x0856
117 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
118 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00
119 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
120 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01
121 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29
122 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30
123 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31
124 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32
125 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
126 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02
127 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
128 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
129 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
131 /* This driver also supports
132 * ATEN UC2324 device using Moschip MCS7840
133 * ATEN UC2322 device using Moschip MCS7820
135 #define USB_VENDOR_ID_ATENINTL 0x0557
136 #define ATENINTL_DEVICE_ID_UC2324 0x2011
137 #define ATENINTL_DEVICE_ID_UC2322 0x7820
139 /* Interrupt Routine Defines */
141 #define SERIAL_IIR_RLS 0x06
142 #define SERIAL_IIR_MS 0x00
145 * Emulation of the bit mask on the LINE STATUS REGISTER.
147 #define SERIAL_LSR_DR 0x0001
148 #define SERIAL_LSR_OE 0x0002
149 #define SERIAL_LSR_PE 0x0004
150 #define SERIAL_LSR_FE 0x0008
151 #define SERIAL_LSR_BI 0x0010
153 #define MOS_MSR_DELTA_CTS 0x10
154 #define MOS_MSR_DELTA_DSR 0x20
155 #define MOS_MSR_DELTA_RI 0x40
156 #define MOS_MSR_DELTA_CD 0x80
158 /* Serial Port register Address */
159 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
160 #define FIFO_CONTROL_REGISTER ((__u16)(0x02))
161 #define LINE_CONTROL_REGISTER ((__u16)(0x03))
162 #define MODEM_CONTROL_REGISTER ((__u16)(0x04))
163 #define LINE_STATUS_REGISTER ((__u16)(0x05))
164 #define MODEM_STATUS_REGISTER ((__u16)(0x06))
165 #define SCRATCH_PAD_REGISTER ((__u16)(0x07))
166 #define DIVISOR_LATCH_LSB ((__u16)(0x00))
167 #define DIVISOR_LATCH_MSB ((__u16)(0x01))
169 #define CLK_MULTI_REGISTER ((__u16)(0x02))
170 #define CLK_START_VALUE_REGISTER ((__u16)(0x03))
171 #define GPIO_REGISTER ((__u16)(0x07))
173 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
176 * URB POOL related defines
178 #define NUM_URBS 16 /* URB Count */
179 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
181 /* LED on/off milliseconds*/
182 #define LED_ON_MS 500
183 #define LED_OFF_MS 500
186 MOS7840_FLAG_CTRL_BUSY,
187 MOS7840_FLAG_LED_BUSY,
190 static const struct usb_device_id id_table[] = {
191 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
192 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
193 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7810)},
194 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
205 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
206 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
207 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
208 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
209 {} /* terminating entry */
211 MODULE_DEVICE_TABLE(usb, id_table);
213 /* This structure holds all of the local port information */
215 struct moschip_port {
216 int port_num; /*Actual port number in the device(1,2,etc) */
217 struct urb *write_urb; /* write URB for this port */
218 struct urb *read_urb; /* read URB for this port */
219 __u8 shadowLCR; /* last LCR value received */
220 __u8 shadowMCR; /* last MCR value received */
223 struct usb_serial_port *port; /* loop back to the owner of this object */
227 __u8 ControlRegOffset;
229 /* for processing control URBS in interrupt context */
230 struct urb *control_urb;
231 struct usb_ctrlrequest *dr;
235 spinlock_t pool_lock;
236 struct urb *write_urb_pool[NUM_URBS];
240 /* For device(s) with LED indicator */
242 struct timer_list led_timer1; /* Timer for LED on */
243 struct timer_list led_timer2; /* Timer for LED off */
245 struct usb_ctrlrequest *led_dr;
251 * mos7840_set_reg_sync
252 * To set the Control register by calling usb_fill_control_urb function
253 * by passing usb_sndctrlpipe function as parameter.
256 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
259 struct usb_device *dev = port->serial->dev;
261 dev_dbg(&port->dev, "mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
263 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
264 MCS_WR_RTYPE, val, reg, NULL, 0,
269 * mos7840_get_reg_sync
270 * To set the Uart register by calling usb_fill_control_urb function by
271 * passing usb_rcvctrlpipe function as parameter.
274 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
277 struct usb_device *dev = port->serial->dev;
281 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
285 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
286 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
289 dev_dbg(&port->dev, "%s offset is %x, return val %x\n", __func__, reg, *val);
296 * mos7840_set_uart_reg
297 * To set the Uart register by calling usb_fill_control_urb function by
298 * passing usb_sndctrlpipe function as parameter.
301 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
305 struct usb_device *dev = port->serial->dev;
307 /* For the UART control registers, the application number need
309 if (port->serial->num_ports == 4) {
310 val |= ((__u16)port->port_number + 1) << 8;
312 if (port->port_number == 0) {
313 val |= ((__u16)port->port_number + 1) << 8;
315 val |= ((__u16)port->port_number + 2) << 8;
318 dev_dbg(&port->dev, "%s application number is %x\n", __func__, val);
319 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
320 MCS_WR_RTYPE, val, reg, NULL, 0,
326 * mos7840_get_uart_reg
327 * To set the Control register by calling usb_fill_control_urb function
328 * by passing usb_rcvctrlpipe function as parameter.
330 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
333 struct usb_device *dev = port->serial->dev;
338 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
342 /* Wval is same as application number */
343 if (port->serial->num_ports == 4) {
344 Wval = ((__u16)port->port_number + 1) << 8;
346 if (port->port_number == 0) {
347 Wval = ((__u16)port->port_number + 1) << 8;
349 Wval = ((__u16)port->port_number + 2) << 8;
352 dev_dbg(&port->dev, "%s application number is %x\n", __func__, Wval);
353 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
354 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
362 static void mos7840_dump_serial_port(struct usb_serial_port *port,
363 struct moschip_port *mos7840_port)
366 dev_dbg(&port->dev, "SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
367 dev_dbg(&port->dev, "ControlRegOffset is %2x\n", mos7840_port->ControlRegOffset);
368 dev_dbg(&port->dev, "DCRRegOffset is %2x\n", mos7840_port->DcrRegOffset);
372 /************************************************************************/
373 /************************************************************************/
374 /* I N T E R F A C E F U N C T I O N S */
375 /* I N T E R F A C E F U N C T I O N S */
376 /************************************************************************/
377 /************************************************************************/
379 static inline void mos7840_set_port_private(struct usb_serial_port *port,
380 struct moschip_port *data)
382 usb_set_serial_port_data(port, (void *)data);
385 static inline struct moschip_port *mos7840_get_port_private(struct
389 return (struct moschip_port *)usb_get_serial_port_data(port);
392 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
394 struct moschip_port *mos7840_port;
395 struct async_icount *icount;
398 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
400 icount = &mos7840_port->port->icount;
402 /* update input line counters */
403 if (new_msr & MOS_MSR_DELTA_CTS)
405 if (new_msr & MOS_MSR_DELTA_DSR)
407 if (new_msr & MOS_MSR_DELTA_CD)
409 if (new_msr & MOS_MSR_DELTA_RI)
412 wake_up_interruptible(&port->port->port.delta_msr_wait);
416 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
418 struct async_icount *icount;
420 if (new_lsr & SERIAL_LSR_BI) {
422 * Parity and Framing errors only count if they
423 * occur exclusive of a break being
426 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
429 /* update input line counters */
430 icount = &port->port->icount;
431 if (new_lsr & SERIAL_LSR_BI)
433 if (new_lsr & SERIAL_LSR_OE)
435 if (new_lsr & SERIAL_LSR_PE)
437 if (new_lsr & SERIAL_LSR_FE)
441 /************************************************************************/
442 /************************************************************************/
443 /* U S B C A L L B A C K F U N C T I O N S */
444 /* U S B C A L L B A C K F U N C T I O N S */
445 /************************************************************************/
446 /************************************************************************/
448 static void mos7840_control_callback(struct urb *urb)
451 struct moschip_port *mos7840_port;
452 struct device *dev = &urb->dev->dev;
454 int status = urb->status;
456 mos7840_port = urb->context;
465 /* this urb is terminated, clean up */
466 dev_dbg(dev, "%s - urb shutting down with status: %d\n", __func__, status);
469 dev_dbg(dev, "%s - nonzero urb status received: %d\n", __func__, status);
473 dev_dbg(dev, "%s urb buffer size is %d\n", __func__, urb->actual_length);
474 dev_dbg(dev, "%s mos7840_port->MsrLsr is %d port %d\n", __func__,
475 mos7840_port->MsrLsr, mos7840_port->port_num);
476 data = urb->transfer_buffer;
477 regval = (__u8) data[0];
478 dev_dbg(dev, "%s data is %x\n", __func__, regval);
479 if (mos7840_port->MsrLsr == 0)
480 mos7840_handle_new_msr(mos7840_port, regval);
481 else if (mos7840_port->MsrLsr == 1)
482 mos7840_handle_new_lsr(mos7840_port, regval);
484 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mos7840_port->flags);
487 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
490 struct usb_device *dev = mcs->port->serial->dev;
491 struct usb_ctrlrequest *dr = mcs->dr;
492 unsigned char *buffer = mcs->ctrl_buf;
495 if (test_and_set_bit_lock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags))
498 dr->bRequestType = MCS_RD_RTYPE;
499 dr->bRequest = MCS_RDREQ;
500 dr->wValue = cpu_to_le16(Wval); /* 0 */
501 dr->wIndex = cpu_to_le16(reg);
502 dr->wLength = cpu_to_le16(2);
504 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
505 (unsigned char *)dr, buffer, 2,
506 mos7840_control_callback, mcs);
507 mcs->control_urb->transfer_buffer_length = 2;
508 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
510 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags);
515 static void mos7840_set_led_callback(struct urb *urb)
517 switch (urb->status) {
524 /* This urb is terminated, clean up */
525 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d",
526 __func__, urb->status);
529 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d",
530 __func__, urb->status);
534 static void mos7840_set_led_async(struct moschip_port *mcs, __u16 wval,
537 struct usb_device *dev = mcs->port->serial->dev;
538 struct usb_ctrlrequest *dr = mcs->led_dr;
540 dr->bRequestType = MCS_WR_RTYPE;
541 dr->bRequest = MCS_WRREQ;
542 dr->wValue = cpu_to_le16(wval);
543 dr->wIndex = cpu_to_le16(reg);
544 dr->wLength = cpu_to_le16(0);
546 usb_fill_control_urb(mcs->led_urb, dev, usb_sndctrlpipe(dev, 0),
547 (unsigned char *)dr, NULL, 0, mos7840_set_led_callback, NULL);
549 usb_submit_urb(mcs->led_urb, GFP_ATOMIC);
552 static void mos7840_set_led_sync(struct usb_serial_port *port, __u16 reg,
555 struct usb_device *dev = port->serial->dev;
557 usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ, MCS_WR_RTYPE,
558 val, reg, NULL, 0, MOS_WDR_TIMEOUT);
561 static void mos7840_led_off(unsigned long arg)
563 struct moschip_port *mcs = (struct moschip_port *) arg;
566 mos7840_set_led_async(mcs, 0x0300, MODEM_CONTROL_REGISTER);
567 mod_timer(&mcs->led_timer2,
568 jiffies + msecs_to_jiffies(LED_OFF_MS));
571 static void mos7840_led_flag_off(unsigned long arg)
573 struct moschip_port *mcs = (struct moschip_port *) arg;
575 clear_bit_unlock(MOS7840_FLAG_LED_BUSY, &mcs->flags);
578 static void mos7840_led_activity(struct usb_serial_port *port)
580 struct moschip_port *mos7840_port = usb_get_serial_port_data(port);
582 if (test_and_set_bit_lock(MOS7840_FLAG_LED_BUSY, &mos7840_port->flags))
585 mos7840_set_led_async(mos7840_port, 0x0301, MODEM_CONTROL_REGISTER);
586 mod_timer(&mos7840_port->led_timer1,
587 jiffies + msecs_to_jiffies(LED_ON_MS));
590 /*****************************************************************************
591 * mos7840_interrupt_callback
592 * this is the callback function for when we have received data on the
593 * interrupt endpoint.
594 *****************************************************************************/
596 static void mos7840_interrupt_callback(struct urb *urb)
600 struct moschip_port *mos7840_port;
601 struct usb_serial *serial;
606 __u16 wval, wreg = 0;
607 int status = urb->status;
616 /* this urb is terminated, clean up */
617 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n",
621 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n",
626 length = urb->actual_length;
627 data = urb->transfer_buffer;
629 serial = urb->context;
631 /* Moschip get 5 bytes
632 * Byte 1 IIR Port 1 (port.number is 0)
633 * Byte 2 IIR Port 2 (port.number is 1)
634 * Byte 3 IIR Port 3 (port.number is 2)
635 * Byte 4 IIR Port 4 (port.number is 3)
636 * Byte 5 FIFO status for both */
638 if (length && length > 5) {
639 dev_dbg(&urb->dev->dev, "%s", "Wrong data !!!\n");
643 sp[0] = (__u8) data[0];
644 sp[1] = (__u8) data[1];
645 sp[2] = (__u8) data[2];
646 sp[3] = (__u8) data[3];
649 for (i = 0; i < serial->num_ports; i++) {
650 mos7840_port = mos7840_get_port_private(serial->port[i]);
651 wval = ((__u16)serial->port[i]->port_number + 1) << 8;
652 if (mos7840_port->open) {
654 dev_dbg(&urb->dev->dev, "SP%d No Interrupt !!!\n", i);
656 switch (sp[i] & 0x0f) {
658 dev_dbg(&urb->dev->dev, "Serial Port %d: Receiver status error or \n", i);
659 dev_dbg(&urb->dev->dev, "address bit detected in 9-bit mode\n");
660 mos7840_port->MsrLsr = 1;
661 wreg = LINE_STATUS_REGISTER;
664 dev_dbg(&urb->dev->dev, "Serial Port %d: Modem status change\n", i);
665 mos7840_port->MsrLsr = 0;
666 wreg = MODEM_STATUS_REGISTER;
669 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
674 /* the completion handler for the control urb will resubmit */
677 result = usb_submit_urb(urb, GFP_ATOMIC);
679 dev_err(&urb->dev->dev,
680 "%s - Error %d submitting interrupt urb\n",
685 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
686 const char *function)
689 pr_debug("%s - port == NULL\n", function);
693 pr_debug("%s - port->serial == NULL\n", function);
700 /* Inline functions to check the sanity of a pointer that is passed to us */
701 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
702 const char *function)
705 pr_debug("%s - serial == NULL\n", function);
709 pr_debug("%s - serial->type == NULL!\n", function);
716 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
717 const char *function)
719 /* if no port was specified, or it fails a paranoia check */
721 mos7840_port_paranoia_check(port, function) ||
722 mos7840_serial_paranoia_check(port->serial, function)) {
723 /* then say that we don't have a valid usb_serial thing,
724 * which will end up genrating -ENODEV return values */
731 /*****************************************************************************
732 * mos7840_bulk_in_callback
733 * this is the callback function for when we have received data on the
735 *****************************************************************************/
737 static void mos7840_bulk_in_callback(struct urb *urb)
741 struct usb_serial *serial;
742 struct usb_serial_port *port;
743 struct moschip_port *mos7840_port;
744 int status = urb->status;
746 mos7840_port = urb->context;
751 dev_dbg(&urb->dev->dev, "nonzero read bulk status received: %d\n", status);
752 mos7840_port->read_urb_busy = false;
756 port = mos7840_port->port;
757 if (mos7840_port_paranoia_check(port, __func__)) {
758 mos7840_port->read_urb_busy = false;
762 serial = mos7840_get_usb_serial(port, __func__);
764 mos7840_port->read_urb_busy = false;
768 data = urb->transfer_buffer;
769 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, data);
771 if (urb->actual_length) {
772 struct tty_port *tport = &mos7840_port->port->port;
773 tty_insert_flip_string(tport, data, urb->actual_length);
774 tty_flip_buffer_push(tport);
775 port->icount.rx += urb->actual_length;
776 dev_dbg(&port->dev, "icount.rx is %d:\n", port->icount.rx);
779 if (!mos7840_port->read_urb) {
780 dev_dbg(&port->dev, "%s", "URB KILLED !!!\n");
781 mos7840_port->read_urb_busy = false;
785 if (mos7840_port->has_led)
786 mos7840_led_activity(port);
788 mos7840_port->read_urb_busy = true;
789 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
792 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, retval = %d\n", retval);
793 mos7840_port->read_urb_busy = false;
797 /*****************************************************************************
798 * mos7840_bulk_out_data_callback
799 * this is the callback function for when we have finished sending
800 * serial data on the bulk out endpoint.
801 *****************************************************************************/
803 static void mos7840_bulk_out_data_callback(struct urb *urb)
805 struct moschip_port *mos7840_port;
806 struct usb_serial_port *port;
807 int status = urb->status;
810 mos7840_port = urb->context;
811 port = mos7840_port->port;
812 spin_lock(&mos7840_port->pool_lock);
813 for (i = 0; i < NUM_URBS; i++) {
814 if (urb == mos7840_port->write_urb_pool[i]) {
815 mos7840_port->busy[i] = 0;
819 spin_unlock(&mos7840_port->pool_lock);
822 dev_dbg(&port->dev, "nonzero write bulk status received:%d\n", status);
826 if (mos7840_port_paranoia_check(port, __func__))
829 if (mos7840_port->open)
830 tty_port_tty_wakeup(&port->port);
834 /************************************************************************/
835 /* 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 */
836 /************************************************************************/
838 /*****************************************************************************
840 * this function is called by the tty driver when a port is opened
841 * If successful, we return 0
842 * Otherwise we return a negative error number.
843 *****************************************************************************/
845 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
849 struct usb_serial *serial;
853 struct moschip_port *mos7840_port;
854 struct moschip_port *port0;
856 if (mos7840_port_paranoia_check(port, __func__))
859 serial = port->serial;
861 if (mos7840_serial_paranoia_check(serial, __func__))
864 mos7840_port = mos7840_get_port_private(port);
865 port0 = mos7840_get_port_private(serial->port[0]);
867 if (mos7840_port == NULL || port0 == NULL)
870 usb_clear_halt(serial->dev, port->write_urb->pipe);
871 usb_clear_halt(serial->dev, port->read_urb->pipe);
874 /* Initialising the write urb pool */
875 for (j = 0; j < NUM_URBS; ++j) {
876 urb = usb_alloc_urb(0, GFP_KERNEL);
877 mos7840_port->write_urb_pool[j] = urb;
881 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
883 if (!urb->transfer_buffer) {
885 mos7840_port->write_urb_pool[j] = NULL;
890 /*****************************************************************************
891 * Initialize MCS7840 -- Write Init values to corresponding Registers
899 * 0x08 : SP1/2 Control Reg
900 *****************************************************************************/
902 /* NEED to check the following Block */
905 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
907 dev_dbg(&port->dev, "Reading Spreg failed\n");
911 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
913 dev_dbg(&port->dev, "writing Spreg failed\n");
918 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
920 dev_dbg(&port->dev, "writing Spreg failed\n");
923 /* End of block to be checked */
926 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
929 dev_dbg(&port->dev, "Reading Controlreg failed\n");
932 Data |= 0x08; /* Driver done bit */
933 Data |= 0x20; /* rx_disable */
934 status = mos7840_set_reg_sync(port,
935 mos7840_port->ControlRegOffset, Data);
937 dev_dbg(&port->dev, "writing Controlreg failed\n");
940 /* do register settings here */
941 /* Set all regs to the device default values. */
942 /***********************************
943 * First Disable all interrupts.
944 ***********************************/
946 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
948 dev_dbg(&port->dev, "disabling interrupts failed\n");
951 /* Set FIFO_CONTROL_REGISTER to the default value */
953 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
955 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
960 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
962 dev_dbg(&port->dev, "Writing FIFO_CONTROL_REGISTER failed\n");
967 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
968 mos7840_port->shadowLCR = Data;
971 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
972 mos7840_port->shadowMCR = Data;
975 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
976 mos7840_port->shadowLCR = Data;
978 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
979 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
982 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
985 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
988 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
990 Data = Data & ~SERIAL_LCR_DLAB;
991 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
992 mos7840_port->shadowLCR = Data;
994 /* clearing Bulkin and Bulkout Fifo */
996 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
999 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1001 Data = Data & ~0x0c;
1002 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1003 /* Finally enable all interrupts */
1005 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1007 /* clearing rx_disable */
1009 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1011 Data = Data & ~0x20;
1012 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1017 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1020 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1023 /* Check to see if we've set up our endpoint info yet *
1024 * (can't set it up in mos7840_startup as the structures *
1025 * were not set up at that time.) */
1026 if (port0->open_ports == 1) {
1027 if (serial->port[0]->interrupt_in_buffer == NULL) {
1028 /* set up interrupt urb */
1029 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1031 usb_rcvintpipe(serial->dev,
1032 serial->port[0]->interrupt_in_endpointAddress),
1033 serial->port[0]->interrupt_in_buffer,
1034 serial->port[0]->interrupt_in_urb->
1035 transfer_buffer_length,
1036 mos7840_interrupt_callback,
1038 serial->port[0]->interrupt_in_urb->interval);
1040 /* start interrupt read for mos7840 *
1041 * will continue as long as mos7840 is connected */
1044 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1047 dev_err(&port->dev, "%s - Error %d submitting "
1048 "interrupt urb\n", __func__, response);
1055 /* see if we've set up our endpoint info yet *
1056 * (can't set it up in mos7840_startup as the *
1057 * structures were not set up at that time.) */
1059 dev_dbg(&port->dev, "port number is %d\n", port->port_number);
1060 dev_dbg(&port->dev, "minor number is %d\n", port->minor);
1061 dev_dbg(&port->dev, "Bulkin endpoint is %d\n", port->bulk_in_endpointAddress);
1062 dev_dbg(&port->dev, "BulkOut endpoint is %d\n", port->bulk_out_endpointAddress);
1063 dev_dbg(&port->dev, "Interrupt endpoint is %d\n", port->interrupt_in_endpointAddress);
1064 dev_dbg(&port->dev, "port's number in the device is %d\n", mos7840_port->port_num);
1065 mos7840_port->read_urb = port->read_urb;
1067 /* set up our bulk in urb */
1068 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
1069 usb_fill_bulk_urb(mos7840_port->read_urb,
1071 usb_rcvbulkpipe(serial->dev,
1072 (port->bulk_in_endpointAddress) + 2),
1073 port->bulk_in_buffer,
1074 mos7840_port->read_urb->transfer_buffer_length,
1075 mos7840_bulk_in_callback, mos7840_port);
1077 usb_fill_bulk_urb(mos7840_port->read_urb,
1079 usb_rcvbulkpipe(serial->dev,
1080 port->bulk_in_endpointAddress),
1081 port->bulk_in_buffer,
1082 mos7840_port->read_urb->transfer_buffer_length,
1083 mos7840_bulk_in_callback, mos7840_port);
1086 dev_dbg(&port->dev, "%s: bulkin endpoint is %d\n", __func__, port->bulk_in_endpointAddress);
1087 mos7840_port->read_urb_busy = true;
1088 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1090 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1091 __func__, response);
1092 mos7840_port->read_urb_busy = false;
1095 /* initialize our port settings */
1096 /* Must set to enable ints! */
1097 mos7840_port->shadowMCR = MCR_MASTER_IE;
1098 /* send a open port command */
1099 mos7840_port->open = 1;
1100 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1104 for (j = 0; j < NUM_URBS; ++j) {
1105 urb = mos7840_port->write_urb_pool[j];
1108 kfree(urb->transfer_buffer);
1114 /*****************************************************************************
1115 * mos7840_chars_in_buffer
1116 * this function is called by the tty driver when it wants to know how many
1117 * bytes of data we currently have outstanding in the port (data that has
1118 * been written, but hasn't made it out the port yet)
1119 * If successful, we return the number of bytes left to be written in the
1121 * Otherwise we return zero.
1122 *****************************************************************************/
1124 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1126 struct usb_serial_port *port = tty->driver_data;
1129 unsigned long flags;
1130 struct moschip_port *mos7840_port;
1132 if (mos7840_port_paranoia_check(port, __func__))
1135 mos7840_port = mos7840_get_port_private(port);
1136 if (mos7840_port == NULL)
1139 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1140 for (i = 0; i < NUM_URBS; ++i) {
1141 if (mos7840_port->busy[i]) {
1142 struct urb *urb = mos7840_port->write_urb_pool[i];
1143 chars += urb->transfer_buffer_length;
1146 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1147 dev_dbg(&port->dev, "%s - returns %d\n", __func__, chars);
1152 /*****************************************************************************
1154 * this function is called by the tty driver when a port is closed
1155 *****************************************************************************/
1157 static void mos7840_close(struct usb_serial_port *port)
1159 struct usb_serial *serial;
1160 struct moschip_port *mos7840_port;
1161 struct moschip_port *port0;
1165 if (mos7840_port_paranoia_check(port, __func__))
1168 serial = mos7840_get_usb_serial(port, __func__);
1172 mos7840_port = mos7840_get_port_private(port);
1173 port0 = mos7840_get_port_private(serial->port[0]);
1175 if (mos7840_port == NULL || port0 == NULL)
1178 for (j = 0; j < NUM_URBS; ++j)
1179 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1181 /* Freeing Write URBs */
1182 for (j = 0; j < NUM_URBS; ++j) {
1183 if (mos7840_port->write_urb_pool[j]) {
1184 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1185 kfree(mos7840_port->write_urb_pool[j]->
1188 usb_free_urb(mos7840_port->write_urb_pool[j]);
1192 usb_kill_urb(mos7840_port->write_urb);
1193 usb_kill_urb(mos7840_port->read_urb);
1194 mos7840_port->read_urb_busy = false;
1196 port0->open_ports--;
1197 dev_dbg(&port->dev, "%s in close%d\n", __func__, port0->open_ports);
1198 if (port0->open_ports == 0) {
1199 if (serial->port[0]->interrupt_in_urb) {
1200 dev_dbg(&port->dev, "Shutdown interrupt_in_urb\n");
1201 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1205 if (mos7840_port->write_urb) {
1206 /* if this urb had a transfer buffer already (old tx) free it */
1207 kfree(mos7840_port->write_urb->transfer_buffer);
1208 usb_free_urb(mos7840_port->write_urb);
1212 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1215 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1217 mos7840_port->open = 0;
1220 /*****************************************************************************
1222 * this function sends a break to the port
1223 *****************************************************************************/
1224 static void mos7840_break(struct tty_struct *tty, int break_state)
1226 struct usb_serial_port *port = tty->driver_data;
1228 struct usb_serial *serial;
1229 struct moschip_port *mos7840_port;
1231 if (mos7840_port_paranoia_check(port, __func__))
1234 serial = mos7840_get_usb_serial(port, __func__);
1238 mos7840_port = mos7840_get_port_private(port);
1240 if (mos7840_port == NULL)
1243 if (break_state == -1)
1244 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1246 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1248 /* FIXME: no locking on shadowLCR anywhere in driver */
1249 mos7840_port->shadowLCR = data;
1250 dev_dbg(&port->dev, "%s mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1251 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1252 mos7840_port->shadowLCR);
1255 /*****************************************************************************
1256 * mos7840_write_room
1257 * this function is called by the tty driver when it wants to know how many
1258 * bytes of data we can accept for a specific port.
1259 * If successful, we return the amount of room that we have for this port
1260 * Otherwise we return a negative error number.
1261 *****************************************************************************/
1263 static int mos7840_write_room(struct tty_struct *tty)
1265 struct usb_serial_port *port = tty->driver_data;
1268 unsigned long flags;
1269 struct moschip_port *mos7840_port;
1271 if (mos7840_port_paranoia_check(port, __func__))
1274 mos7840_port = mos7840_get_port_private(port);
1275 if (mos7840_port == NULL)
1278 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1279 for (i = 0; i < NUM_URBS; ++i) {
1280 if (!mos7840_port->busy[i])
1281 room += URB_TRANSFER_BUFFER_SIZE;
1283 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1285 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1286 dev_dbg(&mos7840_port->port->dev, "%s - returns %d\n", __func__, room);
1291 /*****************************************************************************
1293 * this function is called by the tty driver when data should be written to
1295 * If successful, we return the number of bytes written, otherwise we
1296 * return a negative error number.
1297 *****************************************************************************/
1299 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1300 const unsigned char *data, int count)
1306 unsigned long flags;
1308 struct moschip_port *mos7840_port;
1309 struct usb_serial *serial;
1312 const unsigned char *current_position = data;
1313 unsigned char *data1;
1317 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1318 mos7840_port->shadowLCR = Data;
1319 dev_dbg(&port->dev, "%s: LINE_CONTROL_REGISTER is %x\n", __func__, Data);
1320 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1323 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1324 /* mos7840_port->shadowLCR=Data;//Need to add later */
1326 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1327 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1330 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1332 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1333 dev_dbg(&port->dev, "%s: DLL value is %x\n", __func__, Data);
1336 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1337 dev_dbg(&port->dev, "%s: DLM value is %x\n", __func__, Data);
1339 Data = Data & ~SERIAL_LCR_DLAB;
1340 dev_dbg(&port->dev, "%s: mos7840_port->shadowLCR is %x\n", __func__, mos7840_port->shadowLCR);
1341 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1344 if (mos7840_port_paranoia_check(port, __func__))
1347 serial = port->serial;
1348 if (mos7840_serial_paranoia_check(serial, __func__))
1351 mos7840_port = mos7840_get_port_private(port);
1352 if (mos7840_port == NULL)
1355 /* try to find a free urb in the list */
1358 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1359 for (i = 0; i < NUM_URBS; ++i) {
1360 if (!mos7840_port->busy[i]) {
1361 mos7840_port->busy[i] = 1;
1362 urb = mos7840_port->write_urb_pool[i];
1363 dev_dbg(&port->dev, "URB:%d\n", i);
1367 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1370 dev_dbg(&port->dev, "%s - no more free urbs\n", __func__);
1374 if (urb->transfer_buffer == NULL) {
1375 urb->transfer_buffer =
1376 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1377 if (!urb->transfer_buffer)
1380 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1382 memcpy(urb->transfer_buffer, current_position, transfer_size);
1384 /* fill urb with data and submit */
1385 if ((serial->num_ports == 2) && (((__u16)port->port_number % 2) != 0)) {
1386 usb_fill_bulk_urb(urb,
1388 usb_sndbulkpipe(serial->dev,
1389 (port->bulk_out_endpointAddress) + 2),
1390 urb->transfer_buffer,
1392 mos7840_bulk_out_data_callback, mos7840_port);
1394 usb_fill_bulk_urb(urb,
1396 usb_sndbulkpipe(serial->dev,
1397 port->bulk_out_endpointAddress),
1398 urb->transfer_buffer,
1400 mos7840_bulk_out_data_callback, mos7840_port);
1403 data1 = urb->transfer_buffer;
1404 dev_dbg(&port->dev, "bulkout endpoint is %d\n", port->bulk_out_endpointAddress);
1406 if (mos7840_port->has_led)
1407 mos7840_led_activity(port);
1409 /* send it down the pipe */
1410 status = usb_submit_urb(urb, GFP_ATOMIC);
1413 mos7840_port->busy[i] = 0;
1414 dev_err_console(port, "%s - usb_submit_urb(write bulk) failed "
1415 "with status = %d\n", __func__, status);
1416 bytes_sent = status;
1419 bytes_sent = transfer_size;
1420 port->icount.tx += transfer_size;
1421 dev_dbg(&port->dev, "icount.tx is %d:\n", port->icount.tx);
1427 /*****************************************************************************
1429 * this function is called by the tty driver when it wants to stop the data
1430 * being read from the port.
1431 *****************************************************************************/
1433 static void mos7840_throttle(struct tty_struct *tty)
1435 struct usb_serial_port *port = tty->driver_data;
1436 struct moschip_port *mos7840_port;
1439 if (mos7840_port_paranoia_check(port, __func__))
1442 mos7840_port = mos7840_get_port_private(port);
1444 if (mos7840_port == NULL)
1447 if (!mos7840_port->open) {
1448 dev_dbg(&port->dev, "%s", "port not opened\n");
1452 /* if we are implementing XON/XOFF, send the stop character */
1454 unsigned char stop_char = STOP_CHAR(tty);
1455 status = mos7840_write(tty, port, &stop_char, 1);
1459 /* if we are implementing RTS/CTS, toggle that line */
1460 if (tty->termios.c_cflag & CRTSCTS) {
1461 mos7840_port->shadowMCR &= ~MCR_RTS;
1462 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1463 mos7840_port->shadowMCR);
1469 /*****************************************************************************
1470 * mos7840_unthrottle
1471 * this function is called by the tty driver when it wants to resume
1472 * the data being read from the port (called after mos7840_throttle is
1474 *****************************************************************************/
1475 static void mos7840_unthrottle(struct tty_struct *tty)
1477 struct usb_serial_port *port = tty->driver_data;
1479 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1481 if (mos7840_port_paranoia_check(port, __func__))
1484 if (mos7840_port == NULL)
1487 if (!mos7840_port->open) {
1488 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1492 /* if we are implementing XON/XOFF, send the start character */
1494 unsigned char start_char = START_CHAR(tty);
1495 status = mos7840_write(tty, port, &start_char, 1);
1500 /* if we are implementing RTS/CTS, toggle that line */
1501 if (tty->termios.c_cflag & CRTSCTS) {
1502 mos7840_port->shadowMCR |= MCR_RTS;
1503 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1504 mos7840_port->shadowMCR);
1510 static int mos7840_tiocmget(struct tty_struct *tty)
1512 struct usb_serial_port *port = tty->driver_data;
1513 struct moschip_port *mos7840_port;
1514 unsigned int result;
1518 mos7840_port = mos7840_get_port_private(port);
1520 if (mos7840_port == NULL)
1523 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1526 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1529 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1530 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1531 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1532 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1533 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1534 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1535 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1537 dev_dbg(&port->dev, "%s - 0x%04X\n", __func__, result);
1542 static int mos7840_tiocmset(struct tty_struct *tty,
1543 unsigned int set, unsigned int clear)
1545 struct usb_serial_port *port = tty->driver_data;
1546 struct moschip_port *mos7840_port;
1550 mos7840_port = mos7840_get_port_private(port);
1552 if (mos7840_port == NULL)
1555 /* FIXME: What locks the port registers ? */
1556 mcr = mos7840_port->shadowMCR;
1557 if (clear & TIOCM_RTS)
1559 if (clear & TIOCM_DTR)
1561 if (clear & TIOCM_LOOP)
1562 mcr &= ~MCR_LOOPBACK;
1564 if (set & TIOCM_RTS)
1566 if (set & TIOCM_DTR)
1568 if (set & TIOCM_LOOP)
1569 mcr |= MCR_LOOPBACK;
1571 mos7840_port->shadowMCR = mcr;
1573 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1575 dev_dbg(&port->dev, "setting MODEM_CONTROL_REGISTER Failed\n");
1582 /*****************************************************************************
1583 * mos7840_calc_baud_rate_divisor
1584 * this function calculates the proper baud rate divisor for the specified
1586 *****************************************************************************/
1587 static int mos7840_calc_baud_rate_divisor(struct usb_serial_port *port,
1588 int baudRate, int *divisor,
1591 dev_dbg(&port->dev, "%s - %d\n", __func__, baudRate);
1593 if (baudRate <= 115200) {
1594 *divisor = 115200 / baudRate;
1597 if ((baudRate > 115200) && (baudRate <= 230400)) {
1598 *divisor = 230400 / baudRate;
1599 *clk_sel_val = 0x10;
1600 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1601 *divisor = 403200 / baudRate;
1602 *clk_sel_val = 0x20;
1603 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1604 *divisor = 460800 / baudRate;
1605 *clk_sel_val = 0x30;
1606 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1607 *divisor = 806400 / baudRate;
1608 *clk_sel_val = 0x40;
1609 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1610 *divisor = 921600 / baudRate;
1611 *clk_sel_val = 0x50;
1612 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1613 *divisor = 1572864 / baudRate;
1614 *clk_sel_val = 0x60;
1615 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1616 *divisor = 3145728 / baudRate;
1617 *clk_sel_val = 0x70;
1623 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1624 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1625 *divisor = mos7840_divisor_table[i].Divisor;
1630 /* After trying for all the standard baud rates *
1631 * Try calculating the divisor for this baud rate */
1633 if (baudrate > 75 && baudrate < 230400) {
1634 /* get the divisor */
1635 custom = (__u16) (230400L / baudrate);
1637 /* Check for round off */
1638 round1 = (__u16) (2304000L / baudrate);
1639 round = (__u16) (round1 - (custom * 10));
1644 dev_dbg(&port->dev, " Baud %d = %d\n", baudrate, custom);
1648 dev_dbg(&port->dev, "%s", " Baud calculation Failed...\n");
1653 /*****************************************************************************
1654 * mos7840_send_cmd_write_baud_rate
1655 * this function sends the proper command to change the baud rate of the
1657 *****************************************************************************/
1659 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1665 unsigned char number;
1667 struct usb_serial_port *port;
1669 if (mos7840_port == NULL)
1672 port = mos7840_port->port;
1673 if (mos7840_port_paranoia_check(port, __func__))
1676 if (mos7840_serial_paranoia_check(port->serial, __func__))
1679 number = mos7840_port->port->port_number;
1681 dev_dbg(&port->dev, "%s - baud = %d\n", __func__, baudRate);
1682 /* reset clk_uart_sel in spregOffset */
1683 if (baudRate > 115200) {
1684 #ifdef HW_flow_control
1685 /* NOTE: need to see the pther register to modify */
1686 /* setting h/w flow control bit to 1 */
1688 mos7840_port->shadowMCR = Data;
1689 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1692 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1698 #ifdef HW_flow_control
1699 /* setting h/w flow control bit to 0 */
1701 mos7840_port->shadowMCR = Data;
1702 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1705 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1712 if (1) { /* baudRate <= 115200) */
1715 status = mos7840_calc_baud_rate_divisor(port, baudRate, &divisor,
1717 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1720 dev_dbg(&port->dev, "reading spreg failed in set_serial_baud\n");
1723 Data = (Data & 0x8f) | clk_sel_val;
1724 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1727 dev_dbg(&port->dev, "Writing spreg failed in set_serial_baud\n");
1730 /* Calculate the Divisor */
1733 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1736 /* Enable access to divisor latch */
1737 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1738 mos7840_port->shadowLCR = Data;
1739 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1741 /* Write the divisor */
1742 Data = (unsigned char)(divisor & 0xff);
1743 dev_dbg(&port->dev, "set_serial_baud Value to write DLL is %x\n", Data);
1744 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1746 Data = (unsigned char)((divisor & 0xff00) >> 8);
1747 dev_dbg(&port->dev, "set_serial_baud Value to write DLM is %x\n", Data);
1748 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1750 /* Disable access to divisor latch */
1751 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1752 mos7840_port->shadowLCR = Data;
1753 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1759 /*****************************************************************************
1760 * mos7840_change_port_settings
1761 * This routine is called to set the UART on the device to match
1762 * the specified new settings.
1763 *****************************************************************************/
1765 static void mos7840_change_port_settings(struct tty_struct *tty,
1766 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1776 struct usb_serial_port *port;
1777 struct usb_serial *serial;
1779 if (mos7840_port == NULL)
1782 port = mos7840_port->port;
1784 if (mos7840_port_paranoia_check(port, __func__))
1787 if (mos7840_serial_paranoia_check(port->serial, __func__))
1790 serial = port->serial;
1792 if (!mos7840_port->open) {
1793 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1799 lParity = LCR_PAR_NONE;
1801 cflag = tty->termios.c_cflag;
1802 iflag = tty->termios.c_iflag;
1804 /* Change the number of bits */
1805 switch (cflag & CSIZE) {
1824 /* Change the Parity bit */
1825 if (cflag & PARENB) {
1826 if (cflag & PARODD) {
1827 lParity = LCR_PAR_ODD;
1828 dev_dbg(&port->dev, "%s - parity = odd\n", __func__);
1830 lParity = LCR_PAR_EVEN;
1831 dev_dbg(&port->dev, "%s - parity = even\n", __func__);
1835 dev_dbg(&port->dev, "%s - parity = none\n", __func__);
1839 lParity = lParity | 0x20;
1841 /* Change the Stop bit */
1842 if (cflag & CSTOPB) {
1844 dev_dbg(&port->dev, "%s - stop bits = 2\n", __func__);
1847 dev_dbg(&port->dev, "%s - stop bits = 1\n", __func__);
1850 /* Update the LCR with the correct value */
1851 mos7840_port->shadowLCR &=
1852 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
1853 mos7840_port->shadowLCR |= (lData | lParity | lStop);
1855 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is %x\n", __func__,
1856 mos7840_port->shadowLCR);
1857 /* Disable Interrupts */
1859 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1862 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1865 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1867 /* Send the updated LCR value to the mos7840 */
1868 Data = mos7840_port->shadowLCR;
1870 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1873 mos7840_port->shadowMCR = Data;
1874 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1876 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1878 /* set up the MCR register and send it to the mos7840 */
1880 mos7840_port->shadowMCR = MCR_MASTER_IE;
1882 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
1884 if (cflag & CRTSCTS)
1885 mos7840_port->shadowMCR |= (MCR_XON_ANY);
1887 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
1889 Data = mos7840_port->shadowMCR;
1890 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1892 /* Determine divisor based on baud rate */
1893 baud = tty_get_baud_rate(tty);
1896 /* pick a default, any default... */
1897 dev_dbg(&port->dev, "%s", "Picked default baud...\n");
1901 dev_dbg(&port->dev, "%s - baud rate = %d\n", __func__, baud);
1902 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
1904 /* Enable Interrupts */
1906 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1908 if (mos7840_port->read_urb_busy == false) {
1909 mos7840_port->read_urb_busy = true;
1910 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
1912 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
1914 mos7840_port->read_urb_busy = false;
1917 dev_dbg(&port->dev, "%s - mos7840_port->shadowLCR is End %x\n", __func__,
1918 mos7840_port->shadowLCR);
1921 /*****************************************************************************
1922 * mos7840_set_termios
1923 * this function is called by the tty driver when it wants to change
1924 * the termios structure
1925 *****************************************************************************/
1927 static void mos7840_set_termios(struct tty_struct *tty,
1928 struct usb_serial_port *port,
1929 struct ktermios *old_termios)
1933 struct usb_serial *serial;
1934 struct moschip_port *mos7840_port;
1936 if (mos7840_port_paranoia_check(port, __func__))
1939 serial = port->serial;
1941 if (mos7840_serial_paranoia_check(serial, __func__))
1944 mos7840_port = mos7840_get_port_private(port);
1946 if (mos7840_port == NULL)
1949 if (!mos7840_port->open) {
1950 dev_dbg(&port->dev, "%s - port not opened\n", __func__);
1954 dev_dbg(&port->dev, "%s", "setting termios - \n");
1956 cflag = tty->termios.c_cflag;
1958 dev_dbg(&port->dev, "%s - clfag %08x iflag %08x\n", __func__,
1959 tty->termios.c_cflag, RELEVANT_IFLAG(tty->termios.c_iflag));
1960 dev_dbg(&port->dev, "%s - old clfag %08x old iflag %08x\n", __func__,
1961 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
1963 /* change the port settings to the new ones specified */
1965 mos7840_change_port_settings(tty, mos7840_port, old_termios);
1967 if (!mos7840_port->read_urb) {
1968 dev_dbg(&port->dev, "%s", "URB KILLED !!!!!\n");
1972 if (mos7840_port->read_urb_busy == false) {
1973 mos7840_port->read_urb_busy = true;
1974 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
1976 dev_dbg(&port->dev, "usb_submit_urb(read bulk) failed, status = %d\n",
1978 mos7840_port->read_urb_busy = false;
1983 /*****************************************************************************
1984 * mos7840_get_lsr_info - get line status register info
1986 * Purpose: Let user call ioctl() to get info when the UART physically
1987 * is emptied. On bus types like RS485, the transmitter must
1988 * release the bus after transmitting. This must be done when
1989 * the transmit shift register is empty, not be done when the
1990 * transmit holding register is empty. This functionality
1991 * allows an RS485 driver to be written in user space.
1992 *****************************************************************************/
1994 static int mos7840_get_lsr_info(struct tty_struct *tty,
1995 unsigned int __user *value)
1998 unsigned int result = 0;
2000 count = mos7840_chars_in_buffer(tty);
2002 result = TIOCSER_TEMT;
2004 if (copy_to_user(value, &result, sizeof(int)))
2009 /*****************************************************************************
2010 * mos7840_get_serial_info
2011 * function to get information about serial port
2012 *****************************************************************************/
2014 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2015 struct serial_struct __user *retinfo)
2017 struct serial_struct tmp;
2019 if (mos7840_port == NULL)
2025 memset(&tmp, 0, sizeof(tmp));
2027 tmp.type = PORT_16550A;
2028 tmp.line = mos7840_port->port->minor;
2029 tmp.port = mos7840_port->port->port_number;
2031 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2032 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2033 tmp.baud_base = 9600;
2034 tmp.close_delay = 5 * HZ;
2035 tmp.closing_wait = 30 * HZ;
2037 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2042 /*****************************************************************************
2044 * this function handles any ioctl calls to the driver
2045 *****************************************************************************/
2047 static int mos7840_ioctl(struct tty_struct *tty,
2048 unsigned int cmd, unsigned long arg)
2050 struct usb_serial_port *port = tty->driver_data;
2051 void __user *argp = (void __user *)arg;
2052 struct moschip_port *mos7840_port;
2054 if (mos7840_port_paranoia_check(port, __func__))
2057 mos7840_port = mos7840_get_port_private(port);
2059 if (mos7840_port == NULL)
2063 /* return number of bytes available */
2066 dev_dbg(&port->dev, "%s TIOCSERGETLSR\n", __func__);
2067 return mos7840_get_lsr_info(tty, argp);
2070 dev_dbg(&port->dev, "%s TIOCGSERIAL\n", __func__);
2071 return mos7840_get_serial_info(mos7840_port, argp);
2074 dev_dbg(&port->dev, "%s TIOCSSERIAL\n", __func__);
2079 return -ENOIOCTLCMD;
2082 static int mos7810_check(struct usb_serial *serial)
2084 int i, pass_count = 0;
2086 __u16 data = 0, mcr_data = 0;
2087 __u16 test_pattern = 0x55AA;
2090 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
2092 return 0; /* failed to identify 7810 */
2094 /* Store MCR setting */
2095 res = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2096 MCS_RDREQ, MCS_RD_RTYPE, 0x0300, MODEM_CONTROL_REGISTER,
2097 buf, VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2098 if (res == VENDOR_READ_LENGTH)
2101 for (i = 0; i < 16; i++) {
2102 /* Send the 1-bit test pattern out to MCS7810 test pin */
2103 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2104 MCS_WRREQ, MCS_WR_RTYPE,
2105 (0x0300 | (((test_pattern >> i) & 0x0001) << 1)),
2106 MODEM_CONTROL_REGISTER, NULL, 0, MOS_WDR_TIMEOUT);
2108 /* Read the test pattern back */
2109 res = usb_control_msg(serial->dev,
2110 usb_rcvctrlpipe(serial->dev, 0), MCS_RDREQ,
2111 MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
2112 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2113 if (res == VENDOR_READ_LENGTH)
2116 /* If this is a MCS7810 device, both test patterns must match */
2117 if (((test_pattern >> i) ^ (~data >> 1)) & 0x0001)
2123 /* Restore MCR setting */
2124 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), MCS_WRREQ,
2125 MCS_WR_RTYPE, 0x0300 | mcr_data, MODEM_CONTROL_REGISTER, NULL,
2126 0, MOS_WDR_TIMEOUT);
2130 if (pass_count == 16)
2136 static int mos7840_probe(struct usb_serial *serial,
2137 const struct usb_device_id *id)
2139 u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
2143 if (product == MOSCHIP_DEVICE_ID_7810 ||
2144 product == MOSCHIP_DEVICE_ID_7820) {
2145 device_type = product;
2149 buf = kzalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
2153 usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2154 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, buf,
2155 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2157 /* For a MCS7840 device GPIO0 must be set to 1 */
2159 device_type = MOSCHIP_DEVICE_ID_7840;
2160 else if (mos7810_check(serial))
2161 device_type = MOSCHIP_DEVICE_ID_7810;
2163 device_type = MOSCHIP_DEVICE_ID_7820;
2167 usb_set_serial_data(serial, (void *)(unsigned long)device_type);
2172 static int mos7840_calc_num_ports(struct usb_serial *serial)
2174 int device_type = (unsigned long)usb_get_serial_data(serial);
2175 int mos7840_num_ports;
2177 mos7840_num_ports = (device_type >> 4) & 0x000F;
2179 return mos7840_num_ports;
2182 static int mos7840_port_probe(struct usb_serial_port *port)
2184 struct usb_serial *serial = port->serial;
2185 int device_type = (unsigned long)usb_get_serial_data(serial);
2186 struct moschip_port *mos7840_port;
2191 /* we set up the pointers to the endpoints in the mos7840_open *
2192 * function, as the structures aren't created yet. */
2194 pnum = port->port_number;
2196 dev_dbg(&port->dev, "mos7840_startup: configuring port %d\n", pnum);
2197 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2201 /* Initialize all port interrupt end point to port 0 int
2202 * endpoint. Our device has only one interrupt end point
2203 * common to all port */
2205 mos7840_port->port = port;
2206 mos7840_set_port_private(port, mos7840_port);
2207 spin_lock_init(&mos7840_port->pool_lock);
2209 /* minor is not initialised until later by
2210 * usb-serial.c:get_free_serial() and cannot therefore be used
2211 * to index device instances */
2212 mos7840_port->port_num = pnum + 1;
2213 dev_dbg(&port->dev, "port->minor = %d\n", port->minor);
2214 dev_dbg(&port->dev, "mos7840_port->port_num = %d\n", mos7840_port->port_num);
2216 if (mos7840_port->port_num == 1) {
2217 mos7840_port->SpRegOffset = 0x0;
2218 mos7840_port->ControlRegOffset = 0x1;
2219 mos7840_port->DcrRegOffset = 0x4;
2220 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 4)) {
2221 mos7840_port->SpRegOffset = 0x8;
2222 mos7840_port->ControlRegOffset = 0x9;
2223 mos7840_port->DcrRegOffset = 0x16;
2224 } else if ((mos7840_port->port_num == 2) && (serial->num_ports == 2)) {
2225 mos7840_port->SpRegOffset = 0xa;
2226 mos7840_port->ControlRegOffset = 0xb;
2227 mos7840_port->DcrRegOffset = 0x19;
2228 } else if ((mos7840_port->port_num == 3) && (serial->num_ports == 4)) {
2229 mos7840_port->SpRegOffset = 0xa;
2230 mos7840_port->ControlRegOffset = 0xb;
2231 mos7840_port->DcrRegOffset = 0x19;
2232 } else if ((mos7840_port->port_num == 4) && (serial->num_ports == 4)) {
2233 mos7840_port->SpRegOffset = 0xc;
2234 mos7840_port->ControlRegOffset = 0xd;
2235 mos7840_port->DcrRegOffset = 0x1c;
2237 mos7840_dump_serial_port(port, mos7840_port);
2238 mos7840_set_port_private(port, mos7840_port);
2240 /* enable rx_disable bit in control register */
2241 status = mos7840_get_reg_sync(port,
2242 mos7840_port->ControlRegOffset, &Data);
2244 dev_dbg(&port->dev, "Reading ControlReg failed status-0x%x\n", status);
2247 dev_dbg(&port->dev, "ControlReg Reading success val is %x, status%d\n", Data, status);
2248 Data |= 0x08; /* setting driver done bit */
2249 Data |= 0x04; /* sp1_bit to have cts change reflect in
2252 /* Data |= 0x20; //rx_disable bit */
2253 status = mos7840_set_reg_sync(port,
2254 mos7840_port->ControlRegOffset, Data);
2256 dev_dbg(&port->dev, "Writing ControlReg failed(rx_disable) status-0x%x\n", status);
2259 dev_dbg(&port->dev, "ControlReg Writing success(rx_disable) status%d\n", status);
2261 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2264 status = mos7840_set_reg_sync(port,
2265 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2267 dev_dbg(&port->dev, "Writing DCR0 failed status-0x%x\n", status);
2270 dev_dbg(&port->dev, "DCR0 Writing success status%d\n", status);
2273 status = mos7840_set_reg_sync(port,
2274 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2276 dev_dbg(&port->dev, "Writing DCR1 failed status-0x%x\n", status);
2279 dev_dbg(&port->dev, "DCR1 Writing success status%d\n", status);
2282 status = mos7840_set_reg_sync(port,
2283 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2285 dev_dbg(&port->dev, "Writing DCR2 failed status-0x%x\n", status);
2288 dev_dbg(&port->dev, "DCR2 Writing success status%d\n", status);
2290 /* write values in clkstart0x0 and clkmulti 0x20 */
2292 status = mos7840_set_reg_sync(port, CLK_START_VALUE_REGISTER, Data);
2294 dev_dbg(&port->dev, "Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
2297 dev_dbg(&port->dev, "CLK_START_VALUE_REGISTER Writing success status%d\n", status);
2300 status = mos7840_set_reg_sync(port, CLK_MULTI_REGISTER, Data);
2302 dev_dbg(&port->dev, "Writing CLK_MULTI_REGISTER failed status-0x%x\n", status);
2305 dev_dbg(&port->dev, "CLK_MULTI_REGISTER Writing success status%d\n", status);
2307 /* write value 0x0 to scratchpad register */
2309 status = mos7840_set_uart_reg(port, SCRATCH_PAD_REGISTER, Data);
2311 dev_dbg(&port->dev, "Writing SCRATCH_PAD_REGISTER failed status-0x%x\n", status);
2314 dev_dbg(&port->dev, "SCRATCH_PAD_REGISTER Writing success status%d\n", status);
2316 /* Zero Length flag register */
2317 if ((mos7840_port->port_num != 1) && (serial->num_ports == 2)) {
2319 status = mos7840_set_reg_sync(port,
2321 ((__u16)mos7840_port->port_num)), Data);
2322 dev_dbg(&port->dev, "ZLIP offset %x\n",
2323 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num)));
2325 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 2, status);
2328 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 2, status);
2331 status = mos7840_set_reg_sync(port,
2333 ((__u16)mos7840_port->port_num) - 0x1), Data);
2334 dev_dbg(&port->dev, "ZLIP offset %x\n",
2335 (__u16)(ZLP_REG1 + ((__u16) mos7840_port->port_num) - 0x1));
2337 dev_dbg(&port->dev, "Writing ZLP_REG%d failed status-0x%x\n", pnum + 1, status);
2340 dev_dbg(&port->dev, "ZLP_REG%d Writing success status%d\n", pnum + 1, status);
2343 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2344 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2345 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2347 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2348 !mos7840_port->dr) {
2353 mos7840_port->has_led = false;
2355 /* Initialize LED timers */
2356 if (device_type == MOSCHIP_DEVICE_ID_7810) {
2357 mos7840_port->has_led = true;
2359 mos7840_port->led_urb = usb_alloc_urb(0, GFP_KERNEL);
2360 mos7840_port->led_dr = kmalloc(sizeof(*mos7840_port->led_dr),
2362 if (!mos7840_port->led_urb || !mos7840_port->led_dr) {
2367 init_timer(&mos7840_port->led_timer1);
2368 mos7840_port->led_timer1.function = mos7840_led_off;
2369 mos7840_port->led_timer1.expires =
2370 jiffies + msecs_to_jiffies(LED_ON_MS);
2371 mos7840_port->led_timer1.data = (unsigned long)mos7840_port;
2373 init_timer(&mos7840_port->led_timer2);
2374 mos7840_port->led_timer2.function = mos7840_led_flag_off;
2375 mos7840_port->led_timer2.expires =
2376 jiffies + msecs_to_jiffies(LED_OFF_MS);
2377 mos7840_port->led_timer2.data = (unsigned long)mos7840_port;
2380 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2383 if (pnum == serial->num_ports - 1) {
2384 /* Zero Length flag enable */
2386 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2388 dev_dbg(&port->dev, "Writing ZLP_REG5 failed status-0x%x\n", status);
2391 dev_dbg(&port->dev, "ZLP_REG5 Writing success status%d\n", status);
2393 /* setting configuration feature to one */
2394 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2395 0x03, 0x00, 0x01, 0x00, NULL, 0x00,
2400 kfree(mos7840_port->led_dr);
2401 usb_free_urb(mos7840_port->led_urb);
2402 kfree(mos7840_port->dr);
2403 kfree(mos7840_port->ctrl_buf);
2404 usb_free_urb(mos7840_port->control_urb);
2405 kfree(mos7840_port);
2410 static int mos7840_port_remove(struct usb_serial_port *port)
2412 struct moschip_port *mos7840_port;
2414 mos7840_port = mos7840_get_port_private(port);
2416 if (mos7840_port->has_led) {
2418 mos7840_set_led_sync(port, MODEM_CONTROL_REGISTER, 0x0300);
2420 del_timer_sync(&mos7840_port->led_timer1);
2421 del_timer_sync(&mos7840_port->led_timer2);
2423 usb_kill_urb(mos7840_port->led_urb);
2424 usb_free_urb(mos7840_port->led_urb);
2425 kfree(mos7840_port->led_dr);
2427 usb_kill_urb(mos7840_port->control_urb);
2428 usb_free_urb(mos7840_port->control_urb);
2429 kfree(mos7840_port->ctrl_buf);
2430 kfree(mos7840_port->dr);
2431 kfree(mos7840_port);
2436 static struct usb_serial_driver moschip7840_4port_device = {
2438 .owner = THIS_MODULE,
2441 .description = DRIVER_DESC,
2442 .id_table = id_table,
2444 .open = mos7840_open,
2445 .close = mos7840_close,
2446 .write = mos7840_write,
2447 .write_room = mos7840_write_room,
2448 .chars_in_buffer = mos7840_chars_in_buffer,
2449 .throttle = mos7840_throttle,
2450 .unthrottle = mos7840_unthrottle,
2451 .calc_num_ports = mos7840_calc_num_ports,
2452 .probe = mos7840_probe,
2453 .ioctl = mos7840_ioctl,
2454 .set_termios = mos7840_set_termios,
2455 .break_ctl = mos7840_break,
2456 .tiocmget = mos7840_tiocmget,
2457 .tiocmset = mos7840_tiocmset,
2458 .tiocmiwait = usb_serial_generic_tiocmiwait,
2459 .get_icount = usb_serial_generic_get_icount,
2460 .port_probe = mos7840_port_probe,
2461 .port_remove = mos7840_port_remove,
2462 .read_bulk_callback = mos7840_bulk_in_callback,
2463 .read_int_callback = mos7840_interrupt_callback,
2466 static struct usb_serial_driver * const serial_drivers[] = {
2467 &moschip7840_4port_device, NULL
2470 module_usb_serial_driver(serial_drivers, id_table);
2472 MODULE_DESCRIPTION(DRIVER_DESC);
2473 MODULE_LICENSE("GPL");