2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 * Clean ups from Moschip version and a few ioctl implementations by:
17 * Paul B Schroeder <pschroeder "at" uplogix "dot" com>
19 * Originally based on drivers/usb/serial/io_edgeport.c which is:
20 * Copyright (C) 2000 Inside Out Networks, All rights reserved.
21 * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
25 #include <linux/kernel.h>
26 #include <linux/errno.h>
27 #include <linux/init.h>
28 #include <linux/slab.h>
29 #include <linux/tty.h>
30 #include <linux/tty_driver.h>
31 #include <linux/tty_flip.h>
32 #include <linux/module.h>
33 #include <linux/serial.h>
34 #include <linux/usb.h>
35 #include <linux/usb/serial.h>
36 #include <linux/uaccess.h>
41 #define DRIVER_VERSION "1.3.2"
42 #define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
45 * 16C50 UART register defines
48 #define LCR_BITS_5 0x00 /* 5 bits/char */
49 #define LCR_BITS_6 0x01 /* 6 bits/char */
50 #define LCR_BITS_7 0x02 /* 7 bits/char */
51 #define LCR_BITS_8 0x03 /* 8 bits/char */
52 #define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
54 #define LCR_STOP_1 0x00 /* 1 stop bit */
55 #define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
56 #define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
57 #define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
59 #define LCR_PAR_NONE 0x00 /* No parity */
60 #define LCR_PAR_ODD 0x08 /* Odd parity */
61 #define LCR_PAR_EVEN 0x18 /* Even parity */
62 #define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
63 #define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
64 #define LCR_PAR_MASK 0x38 /* Mask for parity field */
66 #define LCR_SET_BREAK 0x40 /* Set Break condition */
67 #define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
69 #define MCR_DTR 0x01 /* Assert DTR */
70 #define MCR_RTS 0x02 /* Assert RTS */
71 #define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
72 #define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
73 #define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
74 #define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
76 #define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
77 #define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
78 #define MOS7840_MSR_RI 0x40 /* Current state of RI */
79 #define MOS7840_MSR_CD 0x80 /* Current state of CD */
82 * Defines used for sending commands to port
85 #define WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */
86 #define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */
88 #define MOS_PORT1 0x0200
89 #define MOS_PORT2 0x0300
90 #define MOS_VENREG 0x0000
91 #define MOS_MAX_PORT 0x02
92 #define MOS_WRITE 0x0E
96 #define MCS_RD_RTYPE 0xC0
97 #define MCS_WR_RTYPE 0x40
98 #define MCS_RDREQ 0x0D
99 #define MCS_WRREQ 0x0E
100 #define MCS_CTRL_TIMEOUT 500
101 #define VENDOR_READ_LENGTH (0x01)
103 #define MAX_NAME_LEN 64
105 #define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
106 #define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
108 /* For higher baud Rates use TIOCEXBAUD */
109 #define TIOCEXBAUD 0x5462
111 /* vendor id and device id defines */
113 /* The native mos7840/7820 component */
114 #define USB_VENDOR_ID_MOSCHIP 0x9710
115 #define MOSCHIP_DEVICE_ID_7840 0x7840
116 #define MOSCHIP_DEVICE_ID_7820 0x7820
117 /* The native component can have its vendor/device id's overridden
118 * in vendor-specific implementations. Such devices can be handled
119 * by making a change here, in moschip_port_id_table, and in
120 * moschip_id_table_combined
122 #define USB_VENDOR_ID_BANDB 0x0856
123 #define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
124 #define BANDB_DEVICE_ID_USO9ML2_2P 0xBC00
125 #define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
126 #define BANDB_DEVICE_ID_USO9ML2_4P 0xBC01
127 #define BANDB_DEVICE_ID_US9ML2_2 0xAC29
128 #define BANDB_DEVICE_ID_US9ML2_4 0xAC30
129 #define BANDB_DEVICE_ID_USPTL4_2 0xAC31
130 #define BANDB_DEVICE_ID_USPTL4_4 0xAC32
131 #define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
132 #define BANDB_DEVICE_ID_USOPTL4_2P 0xBC02
133 #define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
134 #define BANDB_DEVICE_ID_USOPTL4_4P 0xBC03
135 #define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
137 /* This driver also supports
138 * ATEN UC2324 device using Moschip MCS7840
139 * ATEN UC2322 device using Moschip MCS7820
141 #define USB_VENDOR_ID_ATENINTL 0x0557
142 #define ATENINTL_DEVICE_ID_UC2324 0x2011
143 #define ATENINTL_DEVICE_ID_UC2322 0x7820
145 /* Interrupt Routine Defines */
147 #define SERIAL_IIR_RLS 0x06
148 #define SERIAL_IIR_MS 0x00
151 * Emulation of the bit mask on the LINE STATUS REGISTER.
153 #define SERIAL_LSR_DR 0x0001
154 #define SERIAL_LSR_OE 0x0002
155 #define SERIAL_LSR_PE 0x0004
156 #define SERIAL_LSR_FE 0x0008
157 #define SERIAL_LSR_BI 0x0010
159 #define MOS_MSR_DELTA_CTS 0x10
160 #define MOS_MSR_DELTA_DSR 0x20
161 #define MOS_MSR_DELTA_RI 0x40
162 #define MOS_MSR_DELTA_CD 0x80
164 /* Serial Port register Address */
165 #define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
166 #define FIFO_CONTROL_REGISTER ((__u16)(0x02))
167 #define LINE_CONTROL_REGISTER ((__u16)(0x03))
168 #define MODEM_CONTROL_REGISTER ((__u16)(0x04))
169 #define LINE_STATUS_REGISTER ((__u16)(0x05))
170 #define MODEM_STATUS_REGISTER ((__u16)(0x06))
171 #define SCRATCH_PAD_REGISTER ((__u16)(0x07))
172 #define DIVISOR_LATCH_LSB ((__u16)(0x00))
173 #define DIVISOR_LATCH_MSB ((__u16)(0x01))
175 #define CLK_MULTI_REGISTER ((__u16)(0x02))
176 #define CLK_START_VALUE_REGISTER ((__u16)(0x03))
177 #define GPIO_REGISTER ((__u16)(0x07))
179 #define SERIAL_LCR_DLAB ((__u16)(0x0080))
182 * URB POOL related defines
184 #define NUM_URBS 16 /* URB Count */
185 #define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
188 static const struct usb_device_id moschip_port_id_table[] = {
189 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
190 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
191 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
192 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
193 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
194 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
204 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
205 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
206 {} /* terminating entry */
209 static const struct usb_device_id moschip_id_table_combined[] __devinitconst = {
210 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
211 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
212 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
213 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
214 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
215 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
216 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
217 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
218 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
219 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
220 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
221 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
222 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
223 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
224 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
225 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
226 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
227 {} /* terminating entry */
230 MODULE_DEVICE_TABLE(usb, moschip_id_table_combined);
232 /* This structure holds all of the local port information */
234 struct moschip_port {
235 int port_num; /*Actual port number in the device(1,2,etc) */
236 struct urb *write_urb; /* write URB for this port */
237 struct urb *read_urb; /* read URB for this port */
239 __u8 shadowLCR; /* last LCR value received */
240 __u8 shadowMCR; /* last MCR value received */
244 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
245 wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
247 struct async_icount icount;
248 struct usb_serial_port *port; /* loop back to the owner of this object */
252 __u8 ControlRegOffset;
254 /* for processing control URBS in interrupt context */
255 struct urb *control_urb;
256 struct usb_ctrlrequest *dr;
260 spinlock_t pool_lock;
261 struct urb *write_urb_pool[NUM_URBS];
270 * mos7840_set_reg_sync
271 * To set the Control register by calling usb_fill_control_urb function
272 * by passing usb_sndctrlpipe function as parameter.
275 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
278 struct usb_device *dev = port->serial->dev;
280 dbg("mos7840_set_reg_sync offset is %x, value %x", reg, val);
282 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
283 MCS_WR_RTYPE, val, reg, NULL, 0,
288 * mos7840_get_reg_sync
289 * To set the Uart register by calling usb_fill_control_urb function by
290 * passing usb_rcvctrlpipe function as parameter.
293 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
296 struct usb_device *dev = port->serial->dev;
300 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
304 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
305 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
308 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val);
315 * mos7840_set_uart_reg
316 * To set the Uart register by calling usb_fill_control_urb function by
317 * passing usb_sndctrlpipe function as parameter.
320 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
324 struct usb_device *dev = port->serial->dev;
326 /* For the UART control registers, the application number need
328 if (port->serial->num_ports == 4) {
329 val |= (((__u16) port->number -
330 (__u16) (port->serial->minor)) + 1) << 8;
331 dbg("mos7840_set_uart_reg application number is %x", val);
333 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
334 val |= (((__u16) port->number -
335 (__u16) (port->serial->minor)) + 1) << 8;
336 dbg("mos7840_set_uart_reg application number is %x",
340 (((__u16) port->number -
341 (__u16) (port->serial->minor)) + 2) << 8;
342 dbg("mos7840_set_uart_reg application number is %x",
346 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
347 MCS_WR_RTYPE, val, reg, NULL, 0,
353 * mos7840_get_uart_reg
354 * To set the Control register by calling usb_fill_control_urb function
355 * by passing usb_rcvctrlpipe function as parameter.
357 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
360 struct usb_device *dev = port->serial->dev;
365 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
369 /* dbg("application number is %4x",
370 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
371 /* Wval is same as application number */
372 if (port->serial->num_ports == 4) {
374 (((__u16) port->number - (__u16) (port->serial->minor)) +
376 dbg("mos7840_get_uart_reg application number is %x", Wval);
378 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
379 Wval = (((__u16) port->number -
380 (__u16) (port->serial->minor)) + 1) << 8;
381 dbg("mos7840_get_uart_reg application number is %x",
384 Wval = (((__u16) port->number -
385 (__u16) (port->serial->minor)) + 2) << 8;
386 dbg("mos7840_get_uart_reg application number is %x",
390 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
391 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
399 static void mos7840_dump_serial_port(struct moschip_port *mos7840_port)
402 dbg("***************************************");
403 dbg("SpRegOffset is %2x", mos7840_port->SpRegOffset);
404 dbg("ControlRegOffset is %2x", mos7840_port->ControlRegOffset);
405 dbg("DCRRegOffset is %2x", mos7840_port->DcrRegOffset);
406 dbg("***************************************");
410 /************************************************************************/
411 /************************************************************************/
412 /* I N T E R F A C E F U N C T I O N S */
413 /* I N T E R F A C E F U N C T I O N S */
414 /************************************************************************/
415 /************************************************************************/
417 static inline void mos7840_set_port_private(struct usb_serial_port *port,
418 struct moschip_port *data)
420 usb_set_serial_port_data(port, (void *)data);
423 static inline struct moschip_port *mos7840_get_port_private(struct
427 return (struct moschip_port *)usb_get_serial_port_data(port);
430 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
432 struct moschip_port *mos7840_port;
433 struct async_icount *icount;
435 icount = &mos7840_port->icount;
437 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
439 icount = &mos7840_port->icount;
441 /* update input line counters */
442 if (new_msr & MOS_MSR_DELTA_CTS) {
446 if (new_msr & MOS_MSR_DELTA_DSR) {
450 if (new_msr & MOS_MSR_DELTA_CD) {
454 if (new_msr & MOS_MSR_DELTA_RI) {
461 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
463 struct async_icount *icount;
465 dbg("%s - %02x", __func__, new_lsr);
467 if (new_lsr & SERIAL_LSR_BI) {
469 * Parity and Framing errors only count if they
470 * occur exclusive of a break being
473 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
476 /* update input line counters */
477 icount = &port->icount;
478 if (new_lsr & SERIAL_LSR_BI) {
482 if (new_lsr & SERIAL_LSR_OE) {
486 if (new_lsr & SERIAL_LSR_PE) {
490 if (new_lsr & SERIAL_LSR_FE) {
496 /************************************************************************/
497 /************************************************************************/
498 /* U S B C A L L B A C K F U N C T I O N S */
499 /* U S B C A L L B A C K F U N C T I O N S */
500 /************************************************************************/
501 /************************************************************************/
503 static void mos7840_control_callback(struct urb *urb)
506 struct moschip_port *mos7840_port;
509 int status = urb->status;
511 mos7840_port = urb->context;
520 /* this urb is terminated, clean up */
521 dbg("%s - urb shutting down with status: %d", __func__,
525 dbg("%s - nonzero urb status received: %d", __func__,
530 dbg("%s urb buffer size is %d", __func__, urb->actual_length);
531 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__,
532 mos7840_port->MsrLsr, mos7840_port->port_num);
533 data = urb->transfer_buffer;
534 regval = (__u8) data[0];
535 dbg("%s data is %x", __func__, regval);
536 if (mos7840_port->MsrLsr == 0)
537 mos7840_handle_new_msr(mos7840_port, regval);
538 else if (mos7840_port->MsrLsr == 1)
539 mos7840_handle_new_lsr(mos7840_port, regval);
542 spin_lock(&mos7840_port->pool_lock);
543 if (!mos7840_port->zombie)
544 result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC);
545 spin_unlock(&mos7840_port->pool_lock);
547 dev_err(&urb->dev->dev,
548 "%s - Error %d submitting interrupt urb\n",
553 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
556 struct usb_device *dev = mcs->port->serial->dev;
557 struct usb_ctrlrequest *dr = mcs->dr;
558 unsigned char *buffer = mcs->ctrl_buf;
561 dr->bRequestType = MCS_RD_RTYPE;
562 dr->bRequest = MCS_RDREQ;
563 dr->wValue = cpu_to_le16(Wval); /* 0 */
564 dr->wIndex = cpu_to_le16(reg);
565 dr->wLength = cpu_to_le16(2);
567 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
568 (unsigned char *)dr, buffer, 2,
569 mos7840_control_callback, mcs);
570 mcs->control_urb->transfer_buffer_length = 2;
571 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
575 /*****************************************************************************
576 * mos7840_interrupt_callback
577 * this is the callback function for when we have received data on the
578 * interrupt endpoint.
579 *****************************************************************************/
581 static void mos7840_interrupt_callback(struct urb *urb)
585 struct moschip_port *mos7840_port;
586 struct usb_serial *serial;
591 __u16 wval, wreg = 0;
592 int status = urb->status;
594 dbg("%s", " : Entering");
603 /* this urb is terminated, clean up */
604 dbg("%s - urb shutting down with status: %d", __func__,
608 dbg("%s - nonzero urb status received: %d", __func__,
613 length = urb->actual_length;
614 data = urb->transfer_buffer;
616 serial = urb->context;
618 /* Moschip get 5 bytes
619 * Byte 1 IIR Port 1 (port.number is 0)
620 * Byte 2 IIR Port 2 (port.number is 1)
621 * Byte 3 IIR Port 3 (port.number is 2)
622 * Byte 4 IIR Port 4 (port.number is 3)
623 * Byte 5 FIFO status for both */
625 if (length && length > 5) {
626 dbg("%s", "Wrong data !!!");
630 sp[0] = (__u8) data[0];
631 sp[1] = (__u8) data[1];
632 sp[2] = (__u8) data[2];
633 sp[3] = (__u8) data[3];
636 for (i = 0; i < serial->num_ports; i++) {
637 mos7840_port = mos7840_get_port_private(serial->port[i]);
639 (((__u16) serial->port[i]->number -
640 (__u16) (serial->minor)) + 1) << 8;
641 if (mos7840_port->open) {
643 dbg("SP%d No Interrupt !!!", i);
645 switch (sp[i] & 0x0f) {
647 dbg("Serial Port %d: Receiver status error or ", i);
648 dbg("address bit detected in 9-bit mode");
649 mos7840_port->MsrLsr = 1;
650 wreg = LINE_STATUS_REGISTER;
653 dbg("Serial Port %d: Modem status change", i);
654 mos7840_port->MsrLsr = 0;
655 wreg = MODEM_STATUS_REGISTER;
658 spin_lock(&mos7840_port->pool_lock);
659 if (!mos7840_port->zombie) {
660 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
662 spin_unlock(&mos7840_port->pool_lock);
665 spin_unlock(&mos7840_port->pool_lock);
670 /* the completion handler for the control urb will resubmit */
673 result = usb_submit_urb(urb, GFP_ATOMIC);
675 dev_err(&urb->dev->dev,
676 "%s - Error %d submitting interrupt urb\n",
681 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
682 const char *function)
685 dbg("%s - port == NULL", function);
689 dbg("%s - port->serial == NULL", function);
696 /* Inline functions to check the sanity of a pointer that is passed to us */
697 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
698 const char *function)
701 dbg("%s - serial == NULL", function);
705 dbg("%s - serial->type == NULL!", function);
712 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
713 const char *function)
715 /* if no port was specified, or it fails a paranoia check */
717 mos7840_port_paranoia_check(port, function) ||
718 mos7840_serial_paranoia_check(port->serial, function)) {
719 /* then say that we don't have a valid usb_serial thing,
720 * which will end up genrating -ENODEV return values */
727 /*****************************************************************************
728 * mos7840_bulk_in_callback
729 * this is the callback function for when we have received data on the
731 *****************************************************************************/
733 static void mos7840_bulk_in_callback(struct urb *urb)
737 struct usb_serial *serial;
738 struct usb_serial_port *port;
739 struct moschip_port *mos7840_port;
740 struct tty_struct *tty;
741 int status = urb->status;
743 mos7840_port = urb->context;
745 dbg("%s", "NULL mos7840_port pointer");
750 dbg("nonzero read bulk status received: %d", status);
751 mos7840_port->read_urb_busy = false;
755 port = (struct usb_serial_port *)mos7840_port->port;
756 if (mos7840_port_paranoia_check(port, __func__)) {
757 dbg("%s", "Port Paranoia failed");
758 mos7840_port->read_urb_busy = false;
762 serial = mos7840_get_usb_serial(port, __func__);
764 dbg("%s", "Bad serial pointer");
765 mos7840_port->read_urb_busy = false;
769 dbg("%s", "Entering... ");
771 data = urb->transfer_buffer;
773 dbg("%s", "Entering ...........");
775 if (urb->actual_length) {
776 tty = tty_port_tty_get(&mos7840_port->port->port);
778 tty_insert_flip_string(tty, data, urb->actual_length);
780 tty_flip_buffer_push(tty);
783 mos7840_port->icount.rx += urb->actual_length;
785 dbg("mos7840_port->icount.rx is %d:",
786 mos7840_port->icount.rx);
789 if (!mos7840_port->read_urb) {
790 dbg("%s", "URB KILLED !!!");
791 mos7840_port->read_urb_busy = false;
796 mos7840_port->read_urb->dev = serial->dev;
798 mos7840_port->read_urb_busy = true;
799 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
802 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval);
803 mos7840_port->read_urb_busy = false;
807 /*****************************************************************************
808 * mos7840_bulk_out_data_callback
809 * this is the callback function for when we have finished sending
810 * serial data on the bulk out endpoint.
811 *****************************************************************************/
813 static void mos7840_bulk_out_data_callback(struct urb *urb)
815 struct moschip_port *mos7840_port;
816 struct tty_struct *tty;
817 int status = urb->status;
820 mos7840_port = urb->context;
821 spin_lock(&mos7840_port->pool_lock);
822 for (i = 0; i < NUM_URBS; i++) {
823 if (urb == mos7840_port->write_urb_pool[i]) {
824 mos7840_port->busy[i] = 0;
828 spin_unlock(&mos7840_port->pool_lock);
831 dbg("nonzero write bulk status received:%d", status);
835 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) {
836 dbg("%s", "Port Paranoia failed");
840 dbg("%s", "Entering .........");
842 tty = tty_port_tty_get(&mos7840_port->port->port);
843 if (tty && mos7840_port->open)
849 /************************************************************************/
850 /* 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 */
851 /************************************************************************/
852 #ifdef MCSSerialProbe
853 static int mos7840_serial_probe(struct usb_serial *serial,
854 const struct usb_device_id *id)
857 /*need to implement the mode_reg reading and updating\
858 structures usb_serial_ device_type\
859 (i.e num_ports, num_bulkin,bulkout etc) */
860 /* Also we can update the changes attach */
865 /*****************************************************************************
867 * this function is called by the tty driver when a port is opened
868 * If successful, we return 0
869 * Otherwise we return a negative error number.
870 *****************************************************************************/
872 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
876 struct usb_serial *serial;
880 struct moschip_port *mos7840_port;
881 struct moschip_port *port0;
883 dbg ("%s enter", __func__);
885 if (mos7840_port_paranoia_check(port, __func__)) {
886 dbg("%s", "Port Paranoia failed");
890 serial = port->serial;
892 if (mos7840_serial_paranoia_check(serial, __func__)) {
893 dbg("%s", "Serial Paranoia failed");
897 mos7840_port = mos7840_get_port_private(port);
898 port0 = mos7840_get_port_private(serial->port[0]);
900 if (mos7840_port == NULL || port0 == NULL)
903 usb_clear_halt(serial->dev, port->write_urb->pipe);
904 usb_clear_halt(serial->dev, port->read_urb->pipe);
907 /* Initialising the write urb pool */
908 for (j = 0; j < NUM_URBS; ++j) {
909 urb = usb_alloc_urb(0, GFP_KERNEL);
910 mos7840_port->write_urb_pool[j] = urb;
913 dev_err(&port->dev, "No more urbs???\n");
917 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
919 if (!urb->transfer_buffer) {
921 mos7840_port->write_urb_pool[j] = NULL;
923 "%s-out of memory for urb buffers.\n",
929 /*****************************************************************************
930 * Initialize MCS7840 -- Write Init values to corresponding Registers
938 * 0x08 : SP1/2 Control Reg
939 *****************************************************************************/
941 /* NEED to check the following Block */
944 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
946 dbg("Reading Spreg failed");
950 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
952 dbg("writing Spreg failed");
957 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
959 dbg("writing Spreg failed");
962 /* End of block to be checked */
965 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
968 dbg("Reading Controlreg failed");
971 Data |= 0x08; /* Driver done bit */
972 Data |= 0x20; /* rx_disable */
973 status = mos7840_set_reg_sync(port,
974 mos7840_port->ControlRegOffset, Data);
976 dbg("writing Controlreg failed");
979 /* do register settings here */
980 /* Set all regs to the device default values. */
981 /***********************************
982 * First Disable all interrupts.
983 ***********************************/
985 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
987 dbg("disabling interrupts failed");
990 /* Set FIFO_CONTROL_REGISTER to the default value */
992 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
994 dbg("Writing FIFO_CONTROL_REGISTER failed");
999 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
1001 dbg("Writing FIFO_CONTROL_REGISTER failed");
1006 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1007 mos7840_port->shadowLCR = Data;
1010 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1011 mos7840_port->shadowMCR = Data;
1014 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1015 mos7840_port->shadowLCR = Data;
1017 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1018 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1021 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1024 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1027 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1029 Data = Data & ~SERIAL_LCR_DLAB;
1030 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1031 mos7840_port->shadowLCR = Data;
1033 /* clearing Bulkin and Bulkout Fifo */
1035 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1038 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1040 Data = Data & ~0x0c;
1041 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1042 /* Finally enable all interrupts */
1044 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1046 /* clearing rx_disable */
1048 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1050 Data = Data & ~0x20;
1051 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1056 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1059 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1062 /* Check to see if we've set up our endpoint info yet *
1063 * (can't set it up in mos7840_startup as the structures *
1064 * were not set up at that time.) */
1065 if (port0->open_ports == 1) {
1066 if (serial->port[0]->interrupt_in_buffer == NULL) {
1067 /* set up interrupt urb */
1068 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1070 usb_rcvintpipe(serial->dev,
1071 serial->port[0]->interrupt_in_endpointAddress),
1072 serial->port[0]->interrupt_in_buffer,
1073 serial->port[0]->interrupt_in_urb->
1074 transfer_buffer_length,
1075 mos7840_interrupt_callback,
1077 serial->port[0]->interrupt_in_urb->interval);
1079 /* start interrupt read for mos7840 *
1080 * will continue as long as mos7840 is connected */
1083 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1086 dev_err(&port->dev, "%s - Error %d submitting "
1087 "interrupt urb\n", __func__, response);
1094 /* see if we've set up our endpoint info yet *
1095 * (can't set it up in mos7840_startup as the *
1096 * structures were not set up at that time.) */
1098 dbg("port number is %d", port->number);
1099 dbg("serial number is %d", port->serial->minor);
1100 dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress);
1101 dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress);
1102 dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress);
1103 dbg("port's number in the device is %d", mos7840_port->port_num);
1104 mos7840_port->read_urb = port->read_urb;
1106 /* set up our bulk in urb */
1107 if ((serial->num_ports == 2)
1108 && ((((__u16)port->number -
1109 (__u16)(port->serial->minor)) % 2) != 0)) {
1110 usb_fill_bulk_urb(mos7840_port->read_urb,
1112 usb_rcvbulkpipe(serial->dev,
1113 (port->bulk_in_endpointAddress) + 2),
1114 port->bulk_in_buffer,
1115 mos7840_port->read_urb->transfer_buffer_length,
1116 mos7840_bulk_in_callback, mos7840_port);
1118 usb_fill_bulk_urb(mos7840_port->read_urb,
1120 usb_rcvbulkpipe(serial->dev,
1121 port->bulk_in_endpointAddress),
1122 port->bulk_in_buffer,
1123 mos7840_port->read_urb->transfer_buffer_length,
1124 mos7840_bulk_in_callback, mos7840_port);
1127 dbg("mos7840_open: bulkin endpoint is %d",
1128 port->bulk_in_endpointAddress);
1129 mos7840_port->read_urb_busy = true;
1130 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1132 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1133 __func__, response);
1134 mos7840_port->read_urb_busy = false;
1137 /* initialize our wait queues */
1138 init_waitqueue_head(&mos7840_port->wait_chase);
1139 init_waitqueue_head(&mos7840_port->delta_msr_wait);
1141 /* initialize our icount structure */
1142 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1144 /* initialize our port settings */
1145 /* Must set to enable ints! */
1146 mos7840_port->shadowMCR = MCR_MASTER_IE;
1147 /* send a open port command */
1148 mos7840_port->open = 1;
1149 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1150 mos7840_port->icount.tx = 0;
1151 mos7840_port->icount.rx = 0;
1153 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p",
1154 serial, mos7840_port, port);
1156 dbg ("%s leave", __func__);
1162 /*****************************************************************************
1163 * mos7840_chars_in_buffer
1164 * this function is called by the tty driver when it wants to know how many
1165 * bytes of data we currently have outstanding in the port (data that has
1166 * been written, but hasn't made it out the port yet)
1167 * If successful, we return the number of bytes left to be written in the
1169 * Otherwise we return zero.
1170 *****************************************************************************/
1172 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1174 struct usb_serial_port *port = tty->driver_data;
1177 unsigned long flags;
1178 struct moschip_port *mos7840_port;
1180 dbg("%s", " mos7840_chars_in_buffer:entering ...........");
1182 if (mos7840_port_paranoia_check(port, __func__)) {
1183 dbg("%s", "Invalid port");
1187 mos7840_port = mos7840_get_port_private(port);
1188 if (mos7840_port == NULL) {
1189 dbg("%s", "mos7840_break:leaving ...........");
1193 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1194 for (i = 0; i < NUM_URBS; ++i) {
1195 if (mos7840_port->busy[i]) {
1196 struct urb *urb = mos7840_port->write_urb_pool[i];
1197 chars += urb->transfer_buffer_length;
1200 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1201 dbg("%s - returns %d", __func__, chars);
1206 /*****************************************************************************
1208 * this function is called by the tty driver when a port is closed
1209 *****************************************************************************/
1211 static void mos7840_close(struct usb_serial_port *port)
1213 struct usb_serial *serial;
1214 struct moschip_port *mos7840_port;
1215 struct moschip_port *port0;
1219 dbg("%s", "mos7840_close:entering...");
1221 if (mos7840_port_paranoia_check(port, __func__)) {
1222 dbg("%s", "Port Paranoia failed");
1226 serial = mos7840_get_usb_serial(port, __func__);
1228 dbg("%s", "Serial Paranoia failed");
1232 mos7840_port = mos7840_get_port_private(port);
1233 port0 = mos7840_get_port_private(serial->port[0]);
1235 if (mos7840_port == NULL || port0 == NULL)
1238 for (j = 0; j < NUM_URBS; ++j)
1239 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1241 /* Freeing Write URBs */
1242 for (j = 0; j < NUM_URBS; ++j) {
1243 if (mos7840_port->write_urb_pool[j]) {
1244 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1245 kfree(mos7840_port->write_urb_pool[j]->
1248 usb_free_urb(mos7840_port->write_urb_pool[j]);
1252 /* While closing port, shutdown all bulk read, write *
1253 * and interrupt read if they exists */
1255 if (mos7840_port->write_urb) {
1256 dbg("%s", "Shutdown bulk write");
1257 usb_kill_urb(mos7840_port->write_urb);
1259 if (mos7840_port->read_urb) {
1260 dbg("%s", "Shutdown bulk read");
1261 usb_kill_urb(mos7840_port->read_urb);
1262 mos7840_port->read_urb_busy = false;
1264 if ((&mos7840_port->control_urb)) {
1265 dbg("%s", "Shutdown control read");
1266 /*/ usb_kill_urb (mos7840_port->control_urb); */
1269 /* if(mos7840_port->ctrl_buf != NULL) */
1270 /* kfree(mos7840_port->ctrl_buf); */
1271 port0->open_ports--;
1272 dbg("mos7840_num_open_ports in close%d:in port%d",
1273 port0->open_ports, port->number);
1274 if (port0->open_ports == 0) {
1275 if (serial->port[0]->interrupt_in_urb) {
1276 dbg("%s", "Shutdown interrupt_in_urb");
1277 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1281 if (mos7840_port->write_urb) {
1282 /* if this urb had a transfer buffer already (old tx) free it */
1283 if (mos7840_port->write_urb->transfer_buffer != NULL)
1284 kfree(mos7840_port->write_urb->transfer_buffer);
1285 usb_free_urb(mos7840_port->write_urb);
1289 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1292 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1294 mos7840_port->open = 0;
1296 dbg("%s", "Leaving ............");
1299 /************************************************************************
1301 * mos7840_block_until_chase_response
1303 * This function will block the close until one of the following:
1304 * 1. Response to our Chase comes from mos7840
1305 * 2. A timeout of 10 seconds without activity has expired
1306 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1308 ************************************************************************/
1310 static void mos7840_block_until_chase_response(struct tty_struct *tty,
1311 struct moschip_port *mos7840_port)
1313 int timeout = 1 * HZ;
1318 count = mos7840_chars_in_buffer(tty);
1320 /* Check for Buffer status */
1324 /* Block the thread for a while */
1325 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1327 /* No activity.. count down section */
1330 dbg("%s - TIMEOUT", __func__);
1333 /* Reset timeout value back to seconds */
1340 /*****************************************************************************
1342 * this function sends a break to the port
1343 *****************************************************************************/
1344 static void mos7840_break(struct tty_struct *tty, int break_state)
1346 struct usb_serial_port *port = tty->driver_data;
1348 struct usb_serial *serial;
1349 struct moschip_port *mos7840_port;
1351 dbg("%s", "Entering ...........");
1352 dbg("mos7840_break: Start");
1354 if (mos7840_port_paranoia_check(port, __func__)) {
1355 dbg("%s", "Port Paranoia failed");
1359 serial = mos7840_get_usb_serial(port, __func__);
1361 dbg("%s", "Serial Paranoia failed");
1365 mos7840_port = mos7840_get_port_private(port);
1367 if (mos7840_port == NULL)
1371 /* flush and block until tx is empty */
1372 mos7840_block_until_chase_response(tty, mos7840_port);
1374 if (break_state == -1)
1375 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1377 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1379 /* FIXME: no locking on shadowLCR anywhere in driver */
1380 mos7840_port->shadowLCR = data;
1381 dbg("mcs7840_break mos7840_port->shadowLCR is %x",
1382 mos7840_port->shadowLCR);
1383 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1384 mos7840_port->shadowLCR);
1387 /*****************************************************************************
1388 * mos7840_write_room
1389 * this function is called by the tty driver when it wants to know how many
1390 * bytes of data we can accept for a specific port.
1391 * If successful, we return the amount of room that we have for this port
1392 * Otherwise we return a negative error number.
1393 *****************************************************************************/
1395 static int mos7840_write_room(struct tty_struct *tty)
1397 struct usb_serial_port *port = tty->driver_data;
1400 unsigned long flags;
1401 struct moschip_port *mos7840_port;
1403 dbg("%s", " mos7840_write_room:entering ...........");
1405 if (mos7840_port_paranoia_check(port, __func__)) {
1406 dbg("%s", "Invalid port");
1407 dbg("%s", " mos7840_write_room:leaving ...........");
1411 mos7840_port = mos7840_get_port_private(port);
1412 if (mos7840_port == NULL) {
1413 dbg("%s", "mos7840_break:leaving ...........");
1417 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1418 for (i = 0; i < NUM_URBS; ++i) {
1419 if (!mos7840_port->busy[i])
1420 room += URB_TRANSFER_BUFFER_SIZE;
1422 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1424 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1425 dbg("%s - returns %d", __func__, room);
1430 /*****************************************************************************
1432 * this function is called by the tty driver when data should be written to
1434 * If successful, we return the number of bytes written, otherwise we
1435 * return a negative error number.
1436 *****************************************************************************/
1438 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1439 const unsigned char *data, int count)
1445 unsigned long flags;
1447 struct moschip_port *mos7840_port;
1448 struct usb_serial *serial;
1451 const unsigned char *current_position = data;
1452 unsigned char *data1;
1453 dbg("%s", "entering ...........");
1454 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1455 mos7840_port->shadowLCR); */
1459 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1460 mos7840_port->shadowLCR = Data;
1461 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data);
1462 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1463 mos7840_port->shadowLCR);
1466 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1467 /* mos7840_port->shadowLCR=Data;//Need to add later */
1469 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1470 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1473 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1475 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1476 dbg("mos7840_write:DLL value is %x", Data);
1479 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1480 dbg("mos7840_write:DLM value is %x", Data);
1482 Data = Data & ~SERIAL_LCR_DLAB;
1483 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1484 mos7840_port->shadowLCR);
1485 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1488 if (mos7840_port_paranoia_check(port, __func__)) {
1489 dbg("%s", "Port Paranoia failed");
1493 serial = port->serial;
1494 if (mos7840_serial_paranoia_check(serial, __func__)) {
1495 dbg("%s", "Serial Paranoia failed");
1499 mos7840_port = mos7840_get_port_private(port);
1500 if (mos7840_port == NULL) {
1501 dbg("%s", "mos7840_port is NULL");
1505 /* try to find a free urb in the list */
1508 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1509 for (i = 0; i < NUM_URBS; ++i) {
1510 if (!mos7840_port->busy[i]) {
1511 mos7840_port->busy[i] = 1;
1512 urb = mos7840_port->write_urb_pool[i];
1517 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1520 dbg("%s - no more free urbs", __func__);
1524 if (urb->transfer_buffer == NULL) {
1525 urb->transfer_buffer =
1526 kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
1528 if (urb->transfer_buffer == NULL) {
1529 dev_err(&port->dev, "%s no more kernel memory...\n",
1534 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1536 memcpy(urb->transfer_buffer, current_position, transfer_size);
1538 /* fill urb with data and submit */
1539 if ((serial->num_ports == 2)
1540 && ((((__u16)port->number -
1541 (__u16)(port->serial->minor)) % 2) != 0)) {
1542 usb_fill_bulk_urb(urb,
1544 usb_sndbulkpipe(serial->dev,
1545 (port->bulk_out_endpointAddress) + 2),
1546 urb->transfer_buffer,
1548 mos7840_bulk_out_data_callback, mos7840_port);
1550 usb_fill_bulk_urb(urb,
1552 usb_sndbulkpipe(serial->dev,
1553 port->bulk_out_endpointAddress),
1554 urb->transfer_buffer,
1556 mos7840_bulk_out_data_callback, mos7840_port);
1559 data1 = urb->transfer_buffer;
1560 dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress);
1562 /* send it down the pipe */
1563 status = usb_submit_urb(urb, GFP_ATOMIC);
1566 mos7840_port->busy[i] = 0;
1567 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
1568 "with status = %d\n", __func__, status);
1569 bytes_sent = status;
1572 bytes_sent = transfer_size;
1573 mos7840_port->icount.tx += transfer_size;
1575 dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx);
1581 /*****************************************************************************
1583 * this function is called by the tty driver when it wants to stop the data
1584 * being read from the port.
1585 *****************************************************************************/
1587 static void mos7840_throttle(struct tty_struct *tty)
1589 struct usb_serial_port *port = tty->driver_data;
1590 struct moschip_port *mos7840_port;
1593 if (mos7840_port_paranoia_check(port, __func__)) {
1594 dbg("%s", "Invalid port");
1598 dbg("- port %d", port->number);
1600 mos7840_port = mos7840_get_port_private(port);
1602 if (mos7840_port == NULL)
1605 if (!mos7840_port->open) {
1606 dbg("%s", "port not opened");
1610 dbg("%s", "Entering ..........");
1612 /* if we are implementing XON/XOFF, send the stop character */
1614 unsigned char stop_char = STOP_CHAR(tty);
1615 status = mos7840_write(tty, port, &stop_char, 1);
1619 /* if we are implementing RTS/CTS, toggle that line */
1620 if (tty->termios->c_cflag & CRTSCTS) {
1621 mos7840_port->shadowMCR &= ~MCR_RTS;
1622 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1623 mos7840_port->shadowMCR);
1629 /*****************************************************************************
1630 * mos7840_unthrottle
1631 * this function is called by the tty driver when it wants to resume
1632 * the data being read from the port (called after mos7840_throttle is
1634 *****************************************************************************/
1635 static void mos7840_unthrottle(struct tty_struct *tty)
1637 struct usb_serial_port *port = tty->driver_data;
1639 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1641 if (mos7840_port_paranoia_check(port, __func__)) {
1642 dbg("%s", "Invalid port");
1646 if (mos7840_port == NULL)
1649 if (!mos7840_port->open) {
1650 dbg("%s - port not opened", __func__);
1654 dbg("%s", "Entering ..........");
1656 /* if we are implementing XON/XOFF, send the start character */
1658 unsigned char start_char = START_CHAR(tty);
1659 status = mos7840_write(tty, port, &start_char, 1);
1664 /* if we are implementing RTS/CTS, toggle that line */
1665 if (tty->termios->c_cflag & CRTSCTS) {
1666 mos7840_port->shadowMCR |= MCR_RTS;
1667 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1668 mos7840_port->shadowMCR);
1674 static int mos7840_tiocmget(struct tty_struct *tty)
1676 struct usb_serial_port *port = tty->driver_data;
1677 struct moschip_port *mos7840_port;
1678 unsigned int result;
1682 mos7840_port = mos7840_get_port_private(port);
1684 dbg("%s - port %d", __func__, port->number);
1686 if (mos7840_port == NULL)
1689 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1690 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1691 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1692 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1693 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1694 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1695 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1696 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1697 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1699 dbg("%s - 0x%04X", __func__, result);
1704 static int mos7840_tiocmset(struct tty_struct *tty,
1705 unsigned int set, unsigned int clear)
1707 struct usb_serial_port *port = tty->driver_data;
1708 struct moschip_port *mos7840_port;
1712 dbg("%s - port %d", __func__, port->number);
1714 mos7840_port = mos7840_get_port_private(port);
1716 if (mos7840_port == NULL)
1719 /* FIXME: What locks the port registers ? */
1720 mcr = mos7840_port->shadowMCR;
1721 if (clear & TIOCM_RTS)
1723 if (clear & TIOCM_DTR)
1725 if (clear & TIOCM_LOOP)
1726 mcr &= ~MCR_LOOPBACK;
1728 if (set & TIOCM_RTS)
1730 if (set & TIOCM_DTR)
1732 if (set & TIOCM_LOOP)
1733 mcr |= MCR_LOOPBACK;
1735 mos7840_port->shadowMCR = mcr;
1737 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1739 dbg("setting MODEM_CONTROL_REGISTER Failed");
1746 /*****************************************************************************
1747 * mos7840_calc_baud_rate_divisor
1748 * this function calculates the proper baud rate divisor for the specified
1750 *****************************************************************************/
1751 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
1755 dbg("%s - %d", __func__, baudRate);
1757 if (baudRate <= 115200) {
1758 *divisor = 115200 / baudRate;
1761 if ((baudRate > 115200) && (baudRate <= 230400)) {
1762 *divisor = 230400 / baudRate;
1763 *clk_sel_val = 0x10;
1764 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1765 *divisor = 403200 / baudRate;
1766 *clk_sel_val = 0x20;
1767 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1768 *divisor = 460800 / baudRate;
1769 *clk_sel_val = 0x30;
1770 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1771 *divisor = 806400 / baudRate;
1772 *clk_sel_val = 0x40;
1773 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1774 *divisor = 921600 / baudRate;
1775 *clk_sel_val = 0x50;
1776 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1777 *divisor = 1572864 / baudRate;
1778 *clk_sel_val = 0x60;
1779 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1780 *divisor = 3145728 / baudRate;
1781 *clk_sel_val = 0x70;
1787 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1788 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1789 *divisor = mos7840_divisor_table[i].Divisor;
1794 /* After trying for all the standard baud rates *
1795 * Try calculating the divisor for this baud rate */
1797 if (baudrate > 75 && baudrate < 230400) {
1798 /* get the divisor */
1799 custom = (__u16) (230400L / baudrate);
1801 /* Check for round off */
1802 round1 = (__u16) (2304000L / baudrate);
1803 round = (__u16) (round1 - (custom * 10));
1808 dbg(" Baud %d = %d", baudrate, custom);
1812 dbg("%s", " Baud calculation Failed...");
1817 /*****************************************************************************
1818 * mos7840_send_cmd_write_baud_rate
1819 * this function sends the proper command to change the baud rate of the
1821 *****************************************************************************/
1823 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1829 unsigned char number;
1831 struct usb_serial_port *port;
1833 if (mos7840_port == NULL)
1836 port = (struct usb_serial_port *)mos7840_port->port;
1837 if (mos7840_port_paranoia_check(port, __func__)) {
1838 dbg("%s", "Invalid port");
1842 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
1843 dbg("%s", "Invalid Serial");
1847 dbg("%s", "Entering ..........");
1849 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1851 dbg("%s - port = %d, baud = %d", __func__,
1852 mos7840_port->port->number, baudRate);
1853 /* reset clk_uart_sel in spregOffset */
1854 if (baudRate > 115200) {
1855 #ifdef HW_flow_control
1856 /* NOTE: need to see the pther register to modify */
1857 /* setting h/w flow control bit to 1 */
1859 mos7840_port->shadowMCR = Data;
1860 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1863 dbg("Writing spreg failed in set_serial_baud");
1869 #ifdef HW_flow_control
1870 /* setting h/w flow control bit to 0 */
1872 mos7840_port->shadowMCR = Data;
1873 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1876 dbg("Writing spreg failed in set_serial_baud");
1883 if (1) { /* baudRate <= 115200) */
1886 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor,
1888 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1891 dbg("reading spreg failed in set_serial_baud");
1894 Data = (Data & 0x8f) | clk_sel_val;
1895 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1898 dbg("Writing spreg failed in set_serial_baud");
1901 /* Calculate the Divisor */
1904 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1907 /* Enable access to divisor latch */
1908 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1909 mos7840_port->shadowLCR = Data;
1910 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1912 /* Write the divisor */
1913 Data = (unsigned char)(divisor & 0xff);
1914 dbg("set_serial_baud Value to write DLL is %x", Data);
1915 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1917 Data = (unsigned char)((divisor & 0xff00) >> 8);
1918 dbg("set_serial_baud Value to write DLM is %x", Data);
1919 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1921 /* Disable access to divisor latch */
1922 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1923 mos7840_port->shadowLCR = Data;
1924 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1930 /*****************************************************************************
1931 * mos7840_change_port_settings
1932 * This routine is called to set the UART on the device to match
1933 * the specified new settings.
1934 *****************************************************************************/
1936 static void mos7840_change_port_settings(struct tty_struct *tty,
1937 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1947 struct usb_serial_port *port;
1948 struct usb_serial *serial;
1950 if (mos7840_port == NULL)
1953 port = (struct usb_serial_port *)mos7840_port->port;
1955 if (mos7840_port_paranoia_check(port, __func__)) {
1956 dbg("%s", "Invalid port");
1960 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
1961 dbg("%s", "Invalid Serial");
1965 serial = port->serial;
1967 dbg("%s - port %d", __func__, mos7840_port->port->number);
1969 if (!mos7840_port->open) {
1970 dbg("%s - port not opened", __func__);
1974 dbg("%s", "Entering ..........");
1978 lParity = LCR_PAR_NONE;
1980 cflag = tty->termios->c_cflag;
1981 iflag = tty->termios->c_iflag;
1983 /* Change the number of bits */
1984 if (cflag & CSIZE) {
1985 switch (cflag & CSIZE) {
2003 /* Change the Parity bit */
2004 if (cflag & PARENB) {
2005 if (cflag & PARODD) {
2006 lParity = LCR_PAR_ODD;
2007 dbg("%s - parity = odd", __func__);
2009 lParity = LCR_PAR_EVEN;
2010 dbg("%s - parity = even", __func__);
2014 dbg("%s - parity = none", __func__);
2018 lParity = lParity | 0x20;
2020 /* Change the Stop bit */
2021 if (cflag & CSTOPB) {
2023 dbg("%s - stop bits = 2", __func__);
2026 dbg("%s - stop bits = 1", __func__);
2029 /* Update the LCR with the correct value */
2030 mos7840_port->shadowLCR &=
2031 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2032 mos7840_port->shadowLCR |= (lData | lParity | lStop);
2034 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x",
2035 mos7840_port->shadowLCR);
2036 /* Disable Interrupts */
2038 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2041 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2044 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2046 /* Send the updated LCR value to the mos7840 */
2047 Data = mos7840_port->shadowLCR;
2049 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2052 mos7840_port->shadowMCR = Data;
2053 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2055 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2057 /* set up the MCR register and send it to the mos7840 */
2059 mos7840_port->shadowMCR = MCR_MASTER_IE;
2061 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2063 if (cflag & CRTSCTS)
2064 mos7840_port->shadowMCR |= (MCR_XON_ANY);
2066 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
2068 Data = mos7840_port->shadowMCR;
2069 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2071 /* Determine divisor based on baud rate */
2072 baud = tty_get_baud_rate(tty);
2075 /* pick a default, any default... */
2076 dbg("%s", "Picked default baud...");
2080 dbg("%s - baud rate = %d", __func__, baud);
2081 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2083 /* Enable Interrupts */
2085 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2087 if (mos7840_port->read_urb_busy == false) {
2088 mos7840_port->read_urb->dev = serial->dev;
2089 mos7840_port->read_urb_busy = true;
2090 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2092 dbg("usb_submit_urb(read bulk) failed, status = %d",
2094 mos7840_port->read_urb_busy = false;
2097 wake_up(&mos7840_port->delta_msr_wait);
2098 mos7840_port->delta_msr_cond = 1;
2099 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x",
2100 mos7840_port->shadowLCR);
2103 /*****************************************************************************
2104 * mos7840_set_termios
2105 * this function is called by the tty driver when it wants to change
2106 * the termios structure
2107 *****************************************************************************/
2109 static void mos7840_set_termios(struct tty_struct *tty,
2110 struct usb_serial_port *port,
2111 struct ktermios *old_termios)
2115 struct usb_serial *serial;
2116 struct moschip_port *mos7840_port;
2117 dbg("mos7840_set_termios: START");
2118 if (mos7840_port_paranoia_check(port, __func__)) {
2119 dbg("%s", "Invalid port");
2123 serial = port->serial;
2125 if (mos7840_serial_paranoia_check(serial, __func__)) {
2126 dbg("%s", "Invalid Serial");
2130 mos7840_port = mos7840_get_port_private(port);
2132 if (mos7840_port == NULL)
2135 if (!mos7840_port->open) {
2136 dbg("%s - port not opened", __func__);
2140 dbg("%s", "setting termios - ");
2142 cflag = tty->termios->c_cflag;
2144 dbg("%s - clfag %08x iflag %08x", __func__,
2145 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
2146 dbg("%s - old clfag %08x old iflag %08x", __func__,
2147 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2148 dbg("%s - port %d", __func__, port->number);
2150 /* change the port settings to the new ones specified */
2152 mos7840_change_port_settings(tty, mos7840_port, old_termios);
2154 if (!mos7840_port->read_urb) {
2155 dbg("%s", "URB KILLED !!!!!");
2159 if (mos7840_port->read_urb_busy == false) {
2160 mos7840_port->read_urb->dev = serial->dev;
2161 mos7840_port->read_urb_busy = true;
2162 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2164 dbg("usb_submit_urb(read bulk) failed, status = %d",
2166 mos7840_port->read_urb_busy = false;
2171 /*****************************************************************************
2172 * mos7840_get_lsr_info - get line status register info
2174 * Purpose: Let user call ioctl() to get info when the UART physically
2175 * is emptied. On bus types like RS485, the transmitter must
2176 * release the bus after transmitting. This must be done when
2177 * the transmit shift register is empty, not be done when the
2178 * transmit holding register is empty. This functionality
2179 * allows an RS485 driver to be written in user space.
2180 *****************************************************************************/
2182 static int mos7840_get_lsr_info(struct tty_struct *tty,
2183 unsigned int __user *value)
2186 unsigned int result = 0;
2188 count = mos7840_chars_in_buffer(tty);
2190 dbg("%s -- Empty", __func__);
2191 result = TIOCSER_TEMT;
2194 if (copy_to_user(value, &result, sizeof(int)))
2199 /*****************************************************************************
2200 * mos7840_get_serial_info
2201 * function to get information about serial port
2202 *****************************************************************************/
2204 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2205 struct serial_struct __user *retinfo)
2207 struct serial_struct tmp;
2209 if (mos7840_port == NULL)
2215 memset(&tmp, 0, sizeof(tmp));
2217 tmp.type = PORT_16550A;
2218 tmp.line = mos7840_port->port->serial->minor;
2219 tmp.port = mos7840_port->port->number;
2221 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2222 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2223 tmp.baud_base = 9600;
2224 tmp.close_delay = 5 * HZ;
2225 tmp.closing_wait = 30 * HZ;
2227 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2232 static int mos7840_get_icount(struct tty_struct *tty,
2233 struct serial_icounter_struct *icount)
2235 struct usb_serial_port *port = tty->driver_data;
2236 struct moschip_port *mos7840_port;
2237 struct async_icount cnow;
2239 mos7840_port = mos7840_get_port_private(port);
2240 cnow = mos7840_port->icount;
2243 icount->cts = cnow.cts;
2244 icount->dsr = cnow.dsr;
2245 icount->rng = cnow.rng;
2246 icount->dcd = cnow.dcd;
2247 icount->rx = cnow.rx;
2248 icount->tx = cnow.tx;
2249 icount->frame = cnow.frame;
2250 icount->overrun = cnow.overrun;
2251 icount->parity = cnow.parity;
2252 icount->brk = cnow.brk;
2253 icount->buf_overrun = cnow.buf_overrun;
2255 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
2256 port->number, icount->rx, icount->tx);
2260 /*****************************************************************************
2262 * this function handles any ioctl calls to the driver
2263 *****************************************************************************/
2265 static int mos7840_ioctl(struct tty_struct *tty,
2266 unsigned int cmd, unsigned long arg)
2268 struct usb_serial_port *port = tty->driver_data;
2269 void __user *argp = (void __user *)arg;
2270 struct moschip_port *mos7840_port;
2272 struct async_icount cnow;
2273 struct async_icount cprev;
2275 if (mos7840_port_paranoia_check(port, __func__)) {
2276 dbg("%s", "Invalid port");
2280 mos7840_port = mos7840_get_port_private(port);
2282 if (mos7840_port == NULL)
2285 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
2288 /* return number of bytes available */
2291 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
2292 return mos7840_get_lsr_info(tty, argp);
2295 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
2296 return mos7840_get_serial_info(mos7840_port, argp);
2299 dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
2303 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
2304 cprev = mos7840_port->icount;
2306 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2307 mos7840_port->delta_msr_cond = 0;
2308 wait_event_interruptible(mos7840_port->delta_msr_wait,
2310 delta_msr_cond == 1));
2312 /* see if a signal did it */
2313 if (signal_pending(current))
2314 return -ERESTARTSYS;
2315 cnow = mos7840_port->icount;
2317 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2318 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2319 return -EIO; /* no change => error */
2320 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2321 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2322 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2323 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2334 return -ENOIOCTLCMD;
2337 static int mos7840_calc_num_ports(struct usb_serial *serial)
2341 int mos7840_num_ports;
2343 ret = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2344 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &Data,
2345 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2347 if ((Data & 0x01) == 0) {
2348 mos7840_num_ports = 2;
2349 serial->num_bulk_in = 2;
2350 serial->num_bulk_out = 2;
2351 serial->num_ports = 2;
2353 mos7840_num_ports = 4;
2354 serial->num_bulk_in = 4;
2355 serial->num_bulk_out = 4;
2356 serial->num_ports = 4;
2359 return mos7840_num_ports;
2362 /****************************************************************************
2364 ****************************************************************************/
2366 static int mos7840_startup(struct usb_serial *serial)
2368 struct moschip_port *mos7840_port;
2369 struct usb_device *dev;
2373 dbg("%s", "mos7840_startup :Entering..........");
2376 dbg("%s", "Invalid Handler");
2382 dbg("%s", "Entering...");
2383 dbg ("mos7840_startup: serial = %p", serial);
2385 /* we set up the pointers to the endpoints in the mos7840_open *
2386 * function, as the structures aren't created yet. */
2388 /* set up port private structures */
2389 for (i = 0; i < serial->num_ports; ++i) {
2390 dbg ("mos7840_startup: configuring port %d............", i);
2391 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2392 if (mos7840_port == NULL) {
2393 dev_err(&dev->dev, "%s - Out of memory\n", __func__);
2395 i--; /* don't follow NULL pointer cleaning up */
2399 /* Initialize all port interrupt end point to port 0 int
2400 * endpoint. Our device has only one interrupt end point
2401 * common to all port */
2403 mos7840_port->port = serial->port[i];
2404 mos7840_set_port_private(serial->port[i], mos7840_port);
2405 spin_lock_init(&mos7840_port->pool_lock);
2407 /* minor is not initialised until later by
2408 * usb-serial.c:get_free_serial() and cannot therefore be used
2409 * to index device instances */
2410 mos7840_port->port_num = i + 1;
2411 dbg ("serial->port[i]->number = %d", serial->port[i]->number);
2412 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor);
2413 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num);
2414 dbg ("serial->minor = %d", serial->minor);
2416 if (mos7840_port->port_num == 1) {
2417 mos7840_port->SpRegOffset = 0x0;
2418 mos7840_port->ControlRegOffset = 0x1;
2419 mos7840_port->DcrRegOffset = 0x4;
2420 } else if ((mos7840_port->port_num == 2)
2421 && (serial->num_ports == 4)) {
2422 mos7840_port->SpRegOffset = 0x8;
2423 mos7840_port->ControlRegOffset = 0x9;
2424 mos7840_port->DcrRegOffset = 0x16;
2425 } else if ((mos7840_port->port_num == 2)
2426 && (serial->num_ports == 2)) {
2427 mos7840_port->SpRegOffset = 0xa;
2428 mos7840_port->ControlRegOffset = 0xb;
2429 mos7840_port->DcrRegOffset = 0x19;
2430 } else if ((mos7840_port->port_num == 3)
2431 && (serial->num_ports == 4)) {
2432 mos7840_port->SpRegOffset = 0xa;
2433 mos7840_port->ControlRegOffset = 0xb;
2434 mos7840_port->DcrRegOffset = 0x19;
2435 } else if ((mos7840_port->port_num == 4)
2436 && (serial->num_ports == 4)) {
2437 mos7840_port->SpRegOffset = 0xc;
2438 mos7840_port->ControlRegOffset = 0xd;
2439 mos7840_port->DcrRegOffset = 0x1c;
2441 mos7840_dump_serial_port(mos7840_port);
2442 mos7840_set_port_private(serial->port[i], mos7840_port);
2444 /* enable rx_disable bit in control register */
2445 status = mos7840_get_reg_sync(serial->port[i],
2446 mos7840_port->ControlRegOffset, &Data);
2448 dbg("Reading ControlReg failed status-0x%x", status);
2451 dbg("ControlReg Reading success val is %x, status%d",
2453 Data |= 0x08; /* setting driver done bit */
2454 Data |= 0x04; /* sp1_bit to have cts change reflect in
2457 /* Data |= 0x20; //rx_disable bit */
2458 status = mos7840_set_reg_sync(serial->port[i],
2459 mos7840_port->ControlRegOffset, Data);
2461 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status);
2464 dbg("ControlReg Writing success(rx_disable) status%d",
2467 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2470 status = mos7840_set_reg_sync(serial->port[i],
2471 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2473 dbg("Writing DCR0 failed status-0x%x", status);
2476 dbg("DCR0 Writing success status%d", status);
2479 status = mos7840_set_reg_sync(serial->port[i],
2480 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2482 dbg("Writing DCR1 failed status-0x%x", status);
2485 dbg("DCR1 Writing success status%d", status);
2488 status = mos7840_set_reg_sync(serial->port[i],
2489 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2491 dbg("Writing DCR2 failed status-0x%x", status);
2494 dbg("DCR2 Writing success status%d", status);
2496 /* write values in clkstart0x0 and clkmulti 0x20 */
2498 status = mos7840_set_reg_sync(serial->port[i],
2499 CLK_START_VALUE_REGISTER, Data);
2501 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status);
2504 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status);
2507 status = mos7840_set_reg_sync(serial->port[i],
2508 CLK_MULTI_REGISTER, Data);
2510 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x",
2514 dbg("CLK_MULTI_REGISTER Writing success status%d",
2517 /* write value 0x0 to scratchpad register */
2519 status = mos7840_set_uart_reg(serial->port[i],
2520 SCRATCH_PAD_REGISTER, Data);
2522 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x",
2526 dbg("SCRATCH_PAD_REGISTER Writing success status%d",
2529 /* Zero Length flag register */
2530 if ((mos7840_port->port_num != 1)
2531 && (serial->num_ports == 2)) {
2534 status = mos7840_set_reg_sync(serial->port[i],
2536 ((__u16)mos7840_port->port_num)), Data);
2537 dbg("ZLIP offset %x",
2539 ((__u16) mos7840_port->port_num)));
2541 dbg("Writing ZLP_REG%d failed status-0x%x",
2545 dbg("ZLP_REG%d Writing success status%d",
2549 status = mos7840_set_reg_sync(serial->port[i],
2551 ((__u16)mos7840_port->port_num) - 0x1), Data);
2552 dbg("ZLIP offset %x",
2554 ((__u16) mos7840_port->port_num) - 0x1));
2556 dbg("Writing ZLP_REG%d failed status-0x%x",
2560 dbg("ZLP_REG%d Writing success status%d",
2564 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2565 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2566 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2568 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2569 !mos7840_port->dr) {
2574 dbg ("mos7840_startup: all ports configured...........");
2576 /* Zero Length flag enable */
2578 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2580 dbg("Writing ZLP_REG5 failed status-0x%x", status);
2583 dbg("ZLP_REG5 Writing success status%d", status);
2585 /* setting configuration feature to one */
2586 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2587 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
2590 for (/* nothing */; i >= 0; i--) {
2591 mos7840_port = mos7840_get_port_private(serial->port[i]);
2593 kfree(mos7840_port->dr);
2594 kfree(mos7840_port->ctrl_buf);
2595 usb_free_urb(mos7840_port->control_urb);
2596 kfree(mos7840_port);
2597 serial->port[i] = NULL;
2602 /****************************************************************************
2603 * mos7840_disconnect
2604 * This function is called whenever the device is removed from the usb bus.
2605 ****************************************************************************/
2607 static void mos7840_disconnect(struct usb_serial *serial)
2610 unsigned long flags;
2611 struct moschip_port *mos7840_port;
2612 dbg("%s", " disconnect :entering..........");
2615 dbg("%s", "Invalid Handler");
2619 /* check for the ports to be closed,close the ports and disconnect */
2621 /* free private structure allocated for serial port *
2622 * stop reads and writes on all ports */
2624 for (i = 0; i < serial->num_ports; ++i) {
2625 mos7840_port = mos7840_get_port_private(serial->port[i]);
2626 dbg ("mos7840_port %d = %p", i, mos7840_port);
2628 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
2629 mos7840_port->zombie = 1;
2630 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
2631 usb_kill_urb(mos7840_port->control_urb);
2635 dbg("%s", "Thank u :: ");
2639 /****************************************************************************
2641 * This function is called when the usb_serial structure is freed.
2642 ****************************************************************************/
2644 static void mos7840_release(struct usb_serial *serial)
2647 struct moschip_port *mos7840_port;
2648 dbg("%s", " release :entering..........");
2651 dbg("%s", "Invalid Handler");
2655 /* check for the ports to be closed,close the ports and disconnect */
2657 /* free private structure allocated for serial port *
2658 * stop reads and writes on all ports */
2660 for (i = 0; i < serial->num_ports; ++i) {
2661 mos7840_port = mos7840_get_port_private(serial->port[i]);
2662 dbg("mos7840_port %d = %p", i, mos7840_port);
2664 usb_free_urb(mos7840_port->control_urb);
2665 kfree(mos7840_port->ctrl_buf);
2666 kfree(mos7840_port->dr);
2667 kfree(mos7840_port);
2671 dbg("%s", "Thank u :: ");
2675 static struct usb_driver io_driver = {
2677 .probe = usb_serial_probe,
2678 .disconnect = usb_serial_disconnect,
2679 .id_table = moschip_id_table_combined,
2683 static struct usb_serial_driver moschip7840_4port_device = {
2685 .owner = THIS_MODULE,
2688 .description = DRIVER_DESC,
2689 .usb_driver = &io_driver,
2690 .id_table = moschip_port_id_table,
2692 .open = mos7840_open,
2693 .close = mos7840_close,
2694 .write = mos7840_write,
2695 .write_room = mos7840_write_room,
2696 .chars_in_buffer = mos7840_chars_in_buffer,
2697 .throttle = mos7840_throttle,
2698 .unthrottle = mos7840_unthrottle,
2699 .calc_num_ports = mos7840_calc_num_ports,
2700 #ifdef MCSSerialProbe
2701 .probe = mos7840_serial_probe,
2703 .ioctl = mos7840_ioctl,
2704 .set_termios = mos7840_set_termios,
2705 .break_ctl = mos7840_break,
2706 .tiocmget = mos7840_tiocmget,
2707 .tiocmset = mos7840_tiocmset,
2708 .get_icount = mos7840_get_icount,
2709 .attach = mos7840_startup,
2710 .disconnect = mos7840_disconnect,
2711 .release = mos7840_release,
2712 .read_bulk_callback = mos7840_bulk_in_callback,
2713 .read_int_callback = mos7840_interrupt_callback,
2716 /****************************************************************************
2718 * This is called by the module subsystem, or on startup to initialize us
2719 ****************************************************************************/
2720 static int __init moschip7840_init(void)
2724 dbg("%s", " mos7840_init :entering..........");
2726 /* Register with the usb serial */
2727 retval = usb_serial_register(&moschip7840_4port_device);
2730 goto failed_port_device_register;
2732 dbg("%s", "Entering...");
2733 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
2736 /* Register with the usb */
2737 retval = usb_register(&io_driver);
2739 dbg("%s", "Leaving...");
2742 usb_serial_deregister(&moschip7840_4port_device);
2743 failed_port_device_register:
2747 /****************************************************************************
2749 * Called when the driver is about to be unloaded.
2750 ****************************************************************************/
2751 static void __exit moschip7840_exit(void)
2754 dbg("%s", " mos7840_exit :entering..........");
2756 usb_deregister(&io_driver);
2758 usb_serial_deregister(&moschip7840_4port_device);
2760 dbg("%s", "Entering...");
2763 module_init(moschip7840_init);
2764 module_exit(moschip7840_exit);
2766 /* Module information */
2767 MODULE_DESCRIPTION(DRIVER_DESC);
2768 MODULE_LICENSE("GPL");
2770 module_param(debug, bool, S_IRUGO | S_IWUSR);
2771 MODULE_PARM_DESC(debug, "Debug enabled or not");