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 */
189 MOS7840_FLAG_CTRL_BUSY,
192 static const struct usb_device_id moschip_port_id_table[] = {
193 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
194 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
195 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
196 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
197 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
198 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
199 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
200 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
201 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
202 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
203 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
204 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
205 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
206 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
207 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
208 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
209 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
210 {} /* terminating entry */
213 static const struct usb_device_id moschip_id_table_combined[] __devinitconst = {
214 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
215 {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
216 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
217 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2P)},
218 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
219 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4P)},
220 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
221 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
222 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
223 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
224 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
225 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2P)},
226 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
227 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4P)},
228 {USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
229 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
230 {USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
231 {} /* terminating entry */
234 MODULE_DEVICE_TABLE(usb, moschip_id_table_combined);
236 /* This structure holds all of the local port information */
238 struct moschip_port {
239 int port_num; /*Actual port number in the device(1,2,etc) */
240 struct urb *write_urb; /* write URB for this port */
241 struct urb *read_urb; /* read URB for this port */
242 __u8 shadowLCR; /* last LCR value received */
243 __u8 shadowMCR; /* last MCR value received */
246 wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
248 struct async_icount icount;
249 struct usb_serial_port *port; /* loop back to the owner of this object */
253 __u8 ControlRegOffset;
255 /* for processing control URBS in interrupt context */
256 struct urb *control_urb;
257 struct usb_ctrlrequest *dr;
261 spinlock_t pool_lock;
262 struct urb *write_urb_pool[NUM_URBS];
273 * mos7840_set_reg_sync
274 * To set the Control register by calling usb_fill_control_urb function
275 * by passing usb_sndctrlpipe function as parameter.
278 static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
281 struct usb_device *dev = port->serial->dev;
283 dbg("mos7840_set_reg_sync offset is %x, value %x", reg, val);
285 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
286 MCS_WR_RTYPE, val, reg, NULL, 0,
291 * mos7840_get_reg_sync
292 * To set the Uart register by calling usb_fill_control_urb function by
293 * passing usb_rcvctrlpipe function as parameter.
296 static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
299 struct usb_device *dev = port->serial->dev;
303 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
307 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
308 MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
311 dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val);
318 * mos7840_set_uart_reg
319 * To set the Uart register by calling usb_fill_control_urb function by
320 * passing usb_sndctrlpipe function as parameter.
323 static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
327 struct usb_device *dev = port->serial->dev;
329 /* For the UART control registers, the application number need
331 if (port->serial->num_ports == 4) {
332 val |= (((__u16) port->number -
333 (__u16) (port->serial->minor)) + 1) << 8;
334 dbg("mos7840_set_uart_reg application number is %x", val);
336 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
337 val |= (((__u16) port->number -
338 (__u16) (port->serial->minor)) + 1) << 8;
339 dbg("mos7840_set_uart_reg application number is %x",
343 (((__u16) port->number -
344 (__u16) (port->serial->minor)) + 2) << 8;
345 dbg("mos7840_set_uart_reg application number is %x",
349 return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
350 MCS_WR_RTYPE, val, reg, NULL, 0,
356 * mos7840_get_uart_reg
357 * To set the Control register by calling usb_fill_control_urb function
358 * by passing usb_rcvctrlpipe function as parameter.
360 static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
363 struct usb_device *dev = port->serial->dev;
368 buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
372 /* dbg("application number is %4x",
373 (((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
374 /* Wval is same as application number */
375 if (port->serial->num_ports == 4) {
377 (((__u16) port->number - (__u16) (port->serial->minor)) +
379 dbg("mos7840_get_uart_reg application number is %x", Wval);
381 if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
382 Wval = (((__u16) port->number -
383 (__u16) (port->serial->minor)) + 1) << 8;
384 dbg("mos7840_get_uart_reg application number is %x",
387 Wval = (((__u16) port->number -
388 (__u16) (port->serial->minor)) + 2) << 8;
389 dbg("mos7840_get_uart_reg application number is %x",
393 ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
394 MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
402 static void mos7840_dump_serial_port(struct moschip_port *mos7840_port)
405 dbg("***************************************");
406 dbg("SpRegOffset is %2x", mos7840_port->SpRegOffset);
407 dbg("ControlRegOffset is %2x", mos7840_port->ControlRegOffset);
408 dbg("DCRRegOffset is %2x", mos7840_port->DcrRegOffset);
409 dbg("***************************************");
413 /************************************************************************/
414 /************************************************************************/
415 /* I N T E R F A C E F U N C T I O N S */
416 /* I N T E R F A C E F U N C T I O N S */
417 /************************************************************************/
418 /************************************************************************/
420 static inline void mos7840_set_port_private(struct usb_serial_port *port,
421 struct moschip_port *data)
423 usb_set_serial_port_data(port, (void *)data);
426 static inline struct moschip_port *mos7840_get_port_private(struct
430 return (struct moschip_port *)usb_get_serial_port_data(port);
433 static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
435 struct moschip_port *mos7840_port;
436 struct async_icount *icount;
438 icount = &mos7840_port->icount;
440 (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
442 icount = &mos7840_port->icount;
444 /* update input line counters */
445 if (new_msr & MOS_MSR_DELTA_CTS) {
449 if (new_msr & MOS_MSR_DELTA_DSR) {
453 if (new_msr & MOS_MSR_DELTA_CD) {
457 if (new_msr & MOS_MSR_DELTA_RI) {
462 mos7840_port->delta_msr_cond = 1;
463 wake_up_interruptible(&port->port->delta_msr_wait);
467 static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
469 struct async_icount *icount;
471 dbg("%s - %02x", __func__, new_lsr);
473 if (new_lsr & SERIAL_LSR_BI) {
475 * Parity and Framing errors only count if they
476 * occur exclusive of a break being
479 new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
482 /* update input line counters */
483 icount = &port->icount;
484 if (new_lsr & SERIAL_LSR_BI) {
488 if (new_lsr & SERIAL_LSR_OE) {
492 if (new_lsr & SERIAL_LSR_PE) {
496 if (new_lsr & SERIAL_LSR_FE) {
502 /************************************************************************/
503 /************************************************************************/
504 /* U S B C A L L B A C K F U N C T I O N S */
505 /* U S B C A L L B A C K F U N C T I O N S */
506 /************************************************************************/
507 /************************************************************************/
509 static void mos7840_control_callback(struct urb *urb)
512 struct moschip_port *mos7840_port;
514 int status = urb->status;
516 mos7840_port = urb->context;
525 /* this urb is terminated, clean up */
526 dbg("%s - urb shutting down with status: %d", __func__,
530 dbg("%s - nonzero urb status received: %d", __func__,
535 dbg("%s urb buffer size is %d", __func__, urb->actual_length);
536 dbg("%s mos7840_port->MsrLsr is %d port %d", __func__,
537 mos7840_port->MsrLsr, mos7840_port->port_num);
538 data = urb->transfer_buffer;
539 regval = (__u8) data[0];
540 dbg("%s data is %x", __func__, regval);
541 if (mos7840_port->MsrLsr == 0)
542 mos7840_handle_new_msr(mos7840_port, regval);
543 else if (mos7840_port->MsrLsr == 1)
544 mos7840_handle_new_lsr(mos7840_port, regval);
546 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mos7840_port->flags);
549 static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
552 struct usb_device *dev = mcs->port->serial->dev;
553 struct usb_ctrlrequest *dr = mcs->dr;
554 unsigned char *buffer = mcs->ctrl_buf;
557 if (test_and_set_bit_lock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags))
560 dr->bRequestType = MCS_RD_RTYPE;
561 dr->bRequest = MCS_RDREQ;
562 dr->wValue = cpu_to_le16(Wval); /* 0 */
563 dr->wIndex = cpu_to_le16(reg);
564 dr->wLength = cpu_to_le16(2);
566 usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
567 (unsigned char *)dr, buffer, 2,
568 mos7840_control_callback, mcs);
569 mcs->control_urb->transfer_buffer_length = 2;
570 ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
572 clear_bit_unlock(MOS7840_FLAG_CTRL_BUSY, &mcs->flags);
577 /*****************************************************************************
578 * mos7840_interrupt_callback
579 * this is the callback function for when we have received data on the
580 * interrupt endpoint.
581 *****************************************************************************/
583 static void mos7840_interrupt_callback(struct urb *urb)
587 struct moschip_port *mos7840_port;
588 struct usb_serial *serial;
593 __u16 wval, wreg = 0;
594 int status = urb->status;
596 dbg("%s", " : Entering");
605 /* this urb is terminated, clean up */
606 dbg("%s - urb shutting down with status: %d", __func__,
610 dbg("%s - nonzero urb status received: %d", __func__,
615 length = urb->actual_length;
616 data = urb->transfer_buffer;
618 serial = urb->context;
620 /* Moschip get 5 bytes
621 * Byte 1 IIR Port 1 (port.number is 0)
622 * Byte 2 IIR Port 2 (port.number is 1)
623 * Byte 3 IIR Port 3 (port.number is 2)
624 * Byte 4 IIR Port 4 (port.number is 3)
625 * Byte 5 FIFO status for both */
627 if (length && length > 5) {
628 dbg("%s", "Wrong data !!!");
632 sp[0] = (__u8) data[0];
633 sp[1] = (__u8) data[1];
634 sp[2] = (__u8) data[2];
635 sp[3] = (__u8) data[3];
638 for (i = 0; i < serial->num_ports; i++) {
639 mos7840_port = mos7840_get_port_private(serial->port[i]);
641 (((__u16) serial->port[i]->number -
642 (__u16) (serial->minor)) + 1) << 8;
643 if (mos7840_port->open) {
645 dbg("SP%d No Interrupt !!!", i);
647 switch (sp[i] & 0x0f) {
649 dbg("Serial Port %d: Receiver status error or ", i);
650 dbg("address bit detected in 9-bit mode");
651 mos7840_port->MsrLsr = 1;
652 wreg = LINE_STATUS_REGISTER;
655 dbg("Serial Port %d: Modem status change", i);
656 mos7840_port->MsrLsr = 0;
657 wreg = MODEM_STATUS_REGISTER;
660 rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
665 /* the completion handler for the control urb will resubmit */
668 result = usb_submit_urb(urb, GFP_ATOMIC);
670 dev_err(&urb->dev->dev,
671 "%s - Error %d submitting interrupt urb\n",
676 static int mos7840_port_paranoia_check(struct usb_serial_port *port,
677 const char *function)
680 dbg("%s - port == NULL", function);
684 dbg("%s - port->serial == NULL", function);
691 /* Inline functions to check the sanity of a pointer that is passed to us */
692 static int mos7840_serial_paranoia_check(struct usb_serial *serial,
693 const char *function)
696 dbg("%s - serial == NULL", function);
700 dbg("%s - serial->type == NULL!", function);
707 static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
708 const char *function)
710 /* if no port was specified, or it fails a paranoia check */
712 mos7840_port_paranoia_check(port, function) ||
713 mos7840_serial_paranoia_check(port->serial, function)) {
714 /* then say that we don't have a valid usb_serial thing,
715 * which will end up genrating -ENODEV return values */
722 /*****************************************************************************
723 * mos7840_bulk_in_callback
724 * this is the callback function for when we have received data on the
726 *****************************************************************************/
728 static void mos7840_bulk_in_callback(struct urb *urb)
732 struct usb_serial *serial;
733 struct usb_serial_port *port;
734 struct moschip_port *mos7840_port;
735 struct tty_struct *tty;
736 int status = urb->status;
738 mos7840_port = urb->context;
740 dbg("%s", "NULL mos7840_port pointer");
745 dbg("nonzero read bulk status received: %d", status);
746 mos7840_port->read_urb_busy = false;
750 port = (struct usb_serial_port *)mos7840_port->port;
751 if (mos7840_port_paranoia_check(port, __func__)) {
752 dbg("%s", "Port Paranoia failed");
753 mos7840_port->read_urb_busy = false;
757 serial = mos7840_get_usb_serial(port, __func__);
759 dbg("%s", "Bad serial pointer");
760 mos7840_port->read_urb_busy = false;
764 dbg("%s", "Entering... ");
766 data = urb->transfer_buffer;
768 dbg("%s", "Entering ...........");
770 if (urb->actual_length) {
771 tty = tty_port_tty_get(&mos7840_port->port->port);
773 tty_insert_flip_string(tty, data, urb->actual_length);
775 tty_flip_buffer_push(tty);
778 mos7840_port->icount.rx += urb->actual_length;
780 dbg("mos7840_port->icount.rx is %d:",
781 mos7840_port->icount.rx);
784 if (!mos7840_port->read_urb) {
785 dbg("%s", "URB KILLED !!!");
786 mos7840_port->read_urb_busy = false;
791 mos7840_port->read_urb->dev = serial->dev;
793 mos7840_port->read_urb_busy = true;
794 retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
797 dbg("usb_submit_urb(read bulk) failed, retval = %d", retval);
798 mos7840_port->read_urb_busy = false;
802 /*****************************************************************************
803 * mos7840_bulk_out_data_callback
804 * this is the callback function for when we have finished sending
805 * serial data on the bulk out endpoint.
806 *****************************************************************************/
808 static void mos7840_bulk_out_data_callback(struct urb *urb)
810 struct moschip_port *mos7840_port;
811 struct tty_struct *tty;
812 int status = urb->status;
815 mos7840_port = urb->context;
816 spin_lock(&mos7840_port->pool_lock);
817 for (i = 0; i < NUM_URBS; i++) {
818 if (urb == mos7840_port->write_urb_pool[i]) {
819 mos7840_port->busy[i] = 0;
823 spin_unlock(&mos7840_port->pool_lock);
826 dbg("nonzero write bulk status received:%d", status);
830 if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) {
831 dbg("%s", "Port Paranoia failed");
835 dbg("%s", "Entering .........");
837 tty = tty_port_tty_get(&mos7840_port->port->port);
838 if (tty && mos7840_port->open)
844 /************************************************************************/
845 /* 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 */
846 /************************************************************************/
847 #ifdef MCSSerialProbe
848 static int mos7840_serial_probe(struct usb_serial *serial,
849 const struct usb_device_id *id)
852 /*need to implement the mode_reg reading and updating\
853 structures usb_serial_ device_type\
854 (i.e num_ports, num_bulkin,bulkout etc) */
855 /* Also we can update the changes attach */
860 /*****************************************************************************
862 * this function is called by the tty driver when a port is opened
863 * If successful, we return 0
864 * Otherwise we return a negative error number.
865 *****************************************************************************/
867 static int mos7840_open(struct tty_struct *tty, struct usb_serial_port *port)
871 struct usb_serial *serial;
875 struct moschip_port *mos7840_port;
876 struct moschip_port *port0;
878 dbg ("%s enter", __func__);
880 if (mos7840_port_paranoia_check(port, __func__)) {
881 dbg("%s", "Port Paranoia failed");
885 serial = port->serial;
887 if (mos7840_serial_paranoia_check(serial, __func__)) {
888 dbg("%s", "Serial Paranoia failed");
892 mos7840_port = mos7840_get_port_private(port);
893 port0 = mos7840_get_port_private(serial->port[0]);
895 if (mos7840_port == NULL || port0 == NULL)
898 usb_clear_halt(serial->dev, port->write_urb->pipe);
899 usb_clear_halt(serial->dev, port->read_urb->pipe);
902 /* Initialising the write urb pool */
903 for (j = 0; j < NUM_URBS; ++j) {
904 urb = usb_alloc_urb(0, GFP_KERNEL);
905 mos7840_port->write_urb_pool[j] = urb;
908 dev_err(&port->dev, "No more urbs???\n");
912 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
914 if (!urb->transfer_buffer) {
916 mos7840_port->write_urb_pool[j] = NULL;
918 "%s-out of memory for urb buffers.\n",
924 /*****************************************************************************
925 * Initialize MCS7840 -- Write Init values to corresponding Registers
933 * 0x08 : SP1/2 Control Reg
934 *****************************************************************************/
936 /* NEED to check the following Block */
939 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
941 dbg("Reading Spreg failed");
945 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
947 dbg("writing Spreg failed");
952 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
954 dbg("writing Spreg failed");
957 /* End of block to be checked */
960 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
963 dbg("Reading Controlreg failed");
966 Data |= 0x08; /* Driver done bit */
967 Data |= 0x20; /* rx_disable */
968 status = mos7840_set_reg_sync(port,
969 mos7840_port->ControlRegOffset, Data);
971 dbg("writing Controlreg failed");
974 /* do register settings here */
975 /* Set all regs to the device default values. */
976 /***********************************
977 * First Disable all interrupts.
978 ***********************************/
980 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
982 dbg("disabling interrupts failed");
985 /* Set FIFO_CONTROL_REGISTER to the default value */
987 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
989 dbg("Writing FIFO_CONTROL_REGISTER failed");
994 status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
996 dbg("Writing FIFO_CONTROL_REGISTER failed");
1001 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1002 mos7840_port->shadowLCR = Data;
1005 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1006 mos7840_port->shadowMCR = Data;
1009 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1010 mos7840_port->shadowLCR = Data;
1012 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1013 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1016 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1019 status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1022 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1024 Data = Data & ~SERIAL_LCR_DLAB;
1025 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1026 mos7840_port->shadowLCR = Data;
1028 /* clearing Bulkin and Bulkout Fifo */
1030 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
1033 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1035 Data = Data & ~0x0c;
1036 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
1037 /* Finally enable all interrupts */
1039 status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1041 /* clearing rx_disable */
1043 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1045 Data = Data & ~0x20;
1046 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1051 status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
1054 status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
1057 /* Check to see if we've set up our endpoint info yet *
1058 * (can't set it up in mos7840_startup as the structures *
1059 * were not set up at that time.) */
1060 if (port0->open_ports == 1) {
1061 /* FIXME: Buffer never NULL, so URB is not submitted. */
1062 if (serial->port[0]->interrupt_in_buffer == NULL) {
1063 /* set up interrupt urb */
1064 usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
1066 usb_rcvintpipe(serial->dev,
1067 serial->port[0]->interrupt_in_endpointAddress),
1068 serial->port[0]->interrupt_in_buffer,
1069 serial->port[0]->interrupt_in_urb->
1070 transfer_buffer_length,
1071 mos7840_interrupt_callback,
1073 serial->port[0]->interrupt_in_urb->interval);
1075 /* start interrupt read for mos7840 */
1077 usb_submit_urb(serial->port[0]->interrupt_in_urb,
1080 dev_err(&port->dev, "%s - Error %d submitting "
1081 "interrupt urb\n", __func__, response);
1088 /* see if we've set up our endpoint info yet *
1089 * (can't set it up in mos7840_startup as the *
1090 * structures were not set up at that time.) */
1092 dbg("port number is %d", port->number);
1093 dbg("serial number is %d", port->serial->minor);
1094 dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress);
1095 dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress);
1096 dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress);
1097 dbg("port's number in the device is %d", mos7840_port->port_num);
1098 mos7840_port->read_urb = port->read_urb;
1100 /* set up our bulk in urb */
1101 if ((serial->num_ports == 2)
1102 && ((((__u16)port->number -
1103 (__u16)(port->serial->minor)) % 2) != 0)) {
1104 usb_fill_bulk_urb(mos7840_port->read_urb,
1106 usb_rcvbulkpipe(serial->dev,
1107 (port->bulk_in_endpointAddress) + 2),
1108 port->bulk_in_buffer,
1109 mos7840_port->read_urb->transfer_buffer_length,
1110 mos7840_bulk_in_callback, mos7840_port);
1112 usb_fill_bulk_urb(mos7840_port->read_urb,
1114 usb_rcvbulkpipe(serial->dev,
1115 port->bulk_in_endpointAddress),
1116 port->bulk_in_buffer,
1117 mos7840_port->read_urb->transfer_buffer_length,
1118 mos7840_bulk_in_callback, mos7840_port);
1121 dbg("mos7840_open: bulkin endpoint is %d",
1122 port->bulk_in_endpointAddress);
1123 mos7840_port->read_urb_busy = true;
1124 response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
1126 dev_err(&port->dev, "%s - Error %d submitting control urb\n",
1127 __func__, response);
1128 mos7840_port->read_urb_busy = false;
1131 /* initialize our wait queues */
1132 init_waitqueue_head(&mos7840_port->wait_chase);
1134 /* initialize our icount structure */
1135 memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
1137 /* initialize our port settings */
1138 /* Must set to enable ints! */
1139 mos7840_port->shadowMCR = MCR_MASTER_IE;
1140 /* send a open port command */
1141 mos7840_port->open = 1;
1142 /* mos7840_change_port_settings(mos7840_port,old_termios); */
1143 mos7840_port->icount.tx = 0;
1144 mos7840_port->icount.rx = 0;
1146 dbg("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p",
1147 serial, mos7840_port, port);
1149 dbg ("%s leave", __func__);
1153 for (j = 0; j < NUM_URBS; ++j) {
1154 urb = mos7840_port->write_urb_pool[j];
1157 kfree(urb->transfer_buffer);
1163 /*****************************************************************************
1164 * mos7840_chars_in_buffer
1165 * this function is called by the tty driver when it wants to know how many
1166 * bytes of data we currently have outstanding in the port (data that has
1167 * been written, but hasn't made it out the port yet)
1168 * If successful, we return the number of bytes left to be written in the
1170 * Otherwise we return zero.
1171 *****************************************************************************/
1173 static int mos7840_chars_in_buffer(struct tty_struct *tty)
1175 struct usb_serial_port *port = tty->driver_data;
1178 unsigned long flags;
1179 struct moschip_port *mos7840_port;
1181 dbg("%s", " mos7840_chars_in_buffer:entering ...........");
1183 if (mos7840_port_paranoia_check(port, __func__)) {
1184 dbg("%s", "Invalid port");
1188 mos7840_port = mos7840_get_port_private(port);
1189 if (mos7840_port == NULL) {
1190 dbg("%s", "mos7840_break:leaving ...........");
1194 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1195 for (i = 0; i < NUM_URBS; ++i) {
1196 if (mos7840_port->busy[i]) {
1197 struct urb *urb = mos7840_port->write_urb_pool[i];
1198 chars += urb->transfer_buffer_length;
1201 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1202 dbg("%s - returns %d", __func__, chars);
1207 /*****************************************************************************
1209 * this function is called by the tty driver when a port is closed
1210 *****************************************************************************/
1212 static void mos7840_close(struct usb_serial_port *port)
1214 struct usb_serial *serial;
1215 struct moschip_port *mos7840_port;
1216 struct moschip_port *port0;
1220 dbg("%s", "mos7840_close:entering...");
1222 if (mos7840_port_paranoia_check(port, __func__)) {
1223 dbg("%s", "Port Paranoia failed");
1227 serial = mos7840_get_usb_serial(port, __func__);
1229 dbg("%s", "Serial Paranoia failed");
1233 mos7840_port = mos7840_get_port_private(port);
1234 port0 = mos7840_get_port_private(serial->port[0]);
1236 if (mos7840_port == NULL || port0 == NULL)
1239 for (j = 0; j < NUM_URBS; ++j)
1240 usb_kill_urb(mos7840_port->write_urb_pool[j]);
1242 /* Freeing Write URBs */
1243 for (j = 0; j < NUM_URBS; ++j) {
1244 if (mos7840_port->write_urb_pool[j]) {
1245 if (mos7840_port->write_urb_pool[j]->transfer_buffer)
1246 kfree(mos7840_port->write_urb_pool[j]->
1249 usb_free_urb(mos7840_port->write_urb_pool[j]);
1253 /* While closing port, shutdown all bulk read, write *
1254 * and interrupt read if they exists */
1256 if (mos7840_port->write_urb) {
1257 dbg("%s", "Shutdown bulk write");
1258 usb_kill_urb(mos7840_port->write_urb);
1260 if (mos7840_port->read_urb) {
1261 dbg("%s", "Shutdown bulk read");
1262 usb_kill_urb(mos7840_port->read_urb);
1263 mos7840_port->read_urb_busy = false;
1265 if ((&mos7840_port->control_urb)) {
1266 dbg("%s", "Shutdown control read");
1267 /*/ usb_kill_urb (mos7840_port->control_urb); */
1270 /* if(mos7840_port->ctrl_buf != NULL) */
1271 /* kfree(mos7840_port->ctrl_buf); */
1272 port0->open_ports--;
1273 dbg("mos7840_num_open_ports in close%d:in port%d",
1274 port0->open_ports, port->number);
1275 if (port0->open_ports == 0) {
1276 if (serial->port[0]->interrupt_in_urb) {
1277 dbg("%s", "Shutdown interrupt_in_urb");
1278 usb_kill_urb(serial->port[0]->interrupt_in_urb);
1282 if (mos7840_port->write_urb) {
1283 /* if this urb had a transfer buffer already (old tx) free it */
1284 if (mos7840_port->write_urb->transfer_buffer != NULL)
1285 kfree(mos7840_port->write_urb->transfer_buffer);
1286 usb_free_urb(mos7840_port->write_urb);
1290 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
1293 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
1295 mos7840_port->open = 0;
1297 dbg("%s", "Leaving ............");
1300 /************************************************************************
1302 * mos7840_block_until_chase_response
1304 * This function will block the close until one of the following:
1305 * 1. Response to our Chase comes from mos7840
1306 * 2. A timeout of 10 seconds without activity has expired
1307 * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
1309 ************************************************************************/
1311 static void mos7840_block_until_chase_response(struct tty_struct *tty,
1312 struct moschip_port *mos7840_port)
1314 int timeout = 1 * HZ;
1319 count = mos7840_chars_in_buffer(tty);
1321 /* Check for Buffer status */
1325 /* Block the thread for a while */
1326 interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
1328 /* No activity.. count down section */
1331 dbg("%s - TIMEOUT", __func__);
1334 /* Reset timeout value back to seconds */
1341 /*****************************************************************************
1343 * this function sends a break to the port
1344 *****************************************************************************/
1345 static void mos7840_break(struct tty_struct *tty, int break_state)
1347 struct usb_serial_port *port = tty->driver_data;
1349 struct usb_serial *serial;
1350 struct moschip_port *mos7840_port;
1352 dbg("%s", "Entering ...........");
1353 dbg("mos7840_break: Start");
1355 if (mos7840_port_paranoia_check(port, __func__)) {
1356 dbg("%s", "Port Paranoia failed");
1360 serial = mos7840_get_usb_serial(port, __func__);
1362 dbg("%s", "Serial Paranoia failed");
1366 mos7840_port = mos7840_get_port_private(port);
1368 if (mos7840_port == NULL)
1372 /* flush and block until tx is empty */
1373 mos7840_block_until_chase_response(tty, mos7840_port);
1375 if (break_state == -1)
1376 data = mos7840_port->shadowLCR | LCR_SET_BREAK;
1378 data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
1380 /* FIXME: no locking on shadowLCR anywhere in driver */
1381 mos7840_port->shadowLCR = data;
1382 dbg("mcs7840_break mos7840_port->shadowLCR is %x",
1383 mos7840_port->shadowLCR);
1384 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
1385 mos7840_port->shadowLCR);
1388 /*****************************************************************************
1389 * mos7840_write_room
1390 * this function is called by the tty driver when it wants to know how many
1391 * bytes of data we can accept for a specific port.
1392 * If successful, we return the amount of room that we have for this port
1393 * Otherwise we return a negative error number.
1394 *****************************************************************************/
1396 static int mos7840_write_room(struct tty_struct *tty)
1398 struct usb_serial_port *port = tty->driver_data;
1401 unsigned long flags;
1402 struct moschip_port *mos7840_port;
1404 dbg("%s", " mos7840_write_room:entering ...........");
1406 if (mos7840_port_paranoia_check(port, __func__)) {
1407 dbg("%s", "Invalid port");
1408 dbg("%s", " mos7840_write_room:leaving ...........");
1412 mos7840_port = mos7840_get_port_private(port);
1413 if (mos7840_port == NULL) {
1414 dbg("%s", "mos7840_break:leaving ...........");
1418 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1419 for (i = 0; i < NUM_URBS; ++i) {
1420 if (!mos7840_port->busy[i])
1421 room += URB_TRANSFER_BUFFER_SIZE;
1423 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1425 room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
1426 dbg("%s - returns %d", __func__, room);
1431 /*****************************************************************************
1433 * this function is called by the tty driver when data should be written to
1435 * If successful, we return the number of bytes written, otherwise we
1436 * return a negative error number.
1437 *****************************************************************************/
1439 static int mos7840_write(struct tty_struct *tty, struct usb_serial_port *port,
1440 const unsigned char *data, int count)
1446 unsigned long flags;
1448 struct moschip_port *mos7840_port;
1449 struct usb_serial *serial;
1452 const unsigned char *current_position = data;
1453 unsigned char *data1;
1454 dbg("%s", "entering ...........");
1455 /* dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1456 mos7840_port->shadowLCR); */
1460 status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
1461 mos7840_port->shadowLCR = Data;
1462 dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data);
1463 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1464 mos7840_port->shadowLCR);
1467 /* status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data); */
1468 /* mos7840_port->shadowLCR=Data;//Need to add later */
1470 Data |= SERIAL_LCR_DLAB; /* data latch enable in LCR 0x80 */
1471 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1474 /* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
1476 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
1477 dbg("mos7840_write:DLL value is %x", Data);
1480 status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
1481 dbg("mos7840_write:DLM value is %x", Data);
1483 Data = Data & ~SERIAL_LCR_DLAB;
1484 dbg("mos7840_write: mos7840_port->shadowLCR is %x",
1485 mos7840_port->shadowLCR);
1486 status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1489 if (mos7840_port_paranoia_check(port, __func__)) {
1490 dbg("%s", "Port Paranoia failed");
1494 serial = port->serial;
1495 if (mos7840_serial_paranoia_check(serial, __func__)) {
1496 dbg("%s", "Serial Paranoia failed");
1500 mos7840_port = mos7840_get_port_private(port);
1501 if (mos7840_port == NULL) {
1502 dbg("%s", "mos7840_port is NULL");
1506 /* try to find a free urb in the list */
1509 spin_lock_irqsave(&mos7840_port->pool_lock, flags);
1510 for (i = 0; i < NUM_URBS; ++i) {
1511 if (!mos7840_port->busy[i]) {
1512 mos7840_port->busy[i] = 1;
1513 urb = mos7840_port->write_urb_pool[i];
1518 spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
1521 dbg("%s - no more free urbs", __func__);
1525 if (urb->transfer_buffer == NULL) {
1526 urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
1529 if (urb->transfer_buffer == NULL) {
1530 dev_err(&port->dev, "%s no more kernel memory...\n",
1535 transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
1537 memcpy(urb->transfer_buffer, current_position, transfer_size);
1539 /* fill urb with data and submit */
1540 if ((serial->num_ports == 2)
1541 && ((((__u16)port->number -
1542 (__u16)(port->serial->minor)) % 2) != 0)) {
1543 usb_fill_bulk_urb(urb,
1545 usb_sndbulkpipe(serial->dev,
1546 (port->bulk_out_endpointAddress) + 2),
1547 urb->transfer_buffer,
1549 mos7840_bulk_out_data_callback, mos7840_port);
1551 usb_fill_bulk_urb(urb,
1553 usb_sndbulkpipe(serial->dev,
1554 port->bulk_out_endpointAddress),
1555 urb->transfer_buffer,
1557 mos7840_bulk_out_data_callback, mos7840_port);
1560 data1 = urb->transfer_buffer;
1561 dbg("bulkout endpoint is %d", port->bulk_out_endpointAddress);
1563 /* send it down the pipe */
1564 status = usb_submit_urb(urb, GFP_ATOMIC);
1567 mos7840_port->busy[i] = 0;
1568 dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
1569 "with status = %d\n", __func__, status);
1570 bytes_sent = status;
1573 bytes_sent = transfer_size;
1574 mos7840_port->icount.tx += transfer_size;
1576 dbg("mos7840_port->icount.tx is %d:", mos7840_port->icount.tx);
1582 /*****************************************************************************
1584 * this function is called by the tty driver when it wants to stop the data
1585 * being read from the port.
1586 *****************************************************************************/
1588 static void mos7840_throttle(struct tty_struct *tty)
1590 struct usb_serial_port *port = tty->driver_data;
1591 struct moschip_port *mos7840_port;
1594 if (mos7840_port_paranoia_check(port, __func__)) {
1595 dbg("%s", "Invalid port");
1599 dbg("- port %d", port->number);
1601 mos7840_port = mos7840_get_port_private(port);
1603 if (mos7840_port == NULL)
1606 if (!mos7840_port->open) {
1607 dbg("%s", "port not opened");
1611 dbg("%s", "Entering ..........");
1613 /* if we are implementing XON/XOFF, send the stop character */
1615 unsigned char stop_char = STOP_CHAR(tty);
1616 status = mos7840_write(tty, port, &stop_char, 1);
1620 /* if we are implementing RTS/CTS, toggle that line */
1621 if (tty->termios->c_cflag & CRTSCTS) {
1622 mos7840_port->shadowMCR &= ~MCR_RTS;
1623 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1624 mos7840_port->shadowMCR);
1630 /*****************************************************************************
1631 * mos7840_unthrottle
1632 * this function is called by the tty driver when it wants to resume
1633 * the data being read from the port (called after mos7840_throttle is
1635 *****************************************************************************/
1636 static void mos7840_unthrottle(struct tty_struct *tty)
1638 struct usb_serial_port *port = tty->driver_data;
1640 struct moschip_port *mos7840_port = mos7840_get_port_private(port);
1642 if (mos7840_port_paranoia_check(port, __func__)) {
1643 dbg("%s", "Invalid port");
1647 if (mos7840_port == NULL)
1650 if (!mos7840_port->open) {
1651 dbg("%s - port not opened", __func__);
1655 dbg("%s", "Entering ..........");
1657 /* if we are implementing XON/XOFF, send the start character */
1659 unsigned char start_char = START_CHAR(tty);
1660 status = mos7840_write(tty, port, &start_char, 1);
1665 /* if we are implementing RTS/CTS, toggle that line */
1666 if (tty->termios->c_cflag & CRTSCTS) {
1667 mos7840_port->shadowMCR |= MCR_RTS;
1668 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1669 mos7840_port->shadowMCR);
1675 static int mos7840_tiocmget(struct tty_struct *tty)
1677 struct usb_serial_port *port = tty->driver_data;
1678 struct moschip_port *mos7840_port;
1679 unsigned int result;
1683 mos7840_port = mos7840_get_port_private(port);
1685 dbg("%s - port %d", __func__, port->number);
1687 if (mos7840_port == NULL)
1690 status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
1693 status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
1696 result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
1697 | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
1698 | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
1699 | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
1700 | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
1701 | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
1702 | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
1704 dbg("%s - 0x%04X", __func__, result);
1709 static int mos7840_tiocmset(struct tty_struct *tty,
1710 unsigned int set, unsigned int clear)
1712 struct usb_serial_port *port = tty->driver_data;
1713 struct moschip_port *mos7840_port;
1717 dbg("%s - port %d", __func__, port->number);
1719 mos7840_port = mos7840_get_port_private(port);
1721 if (mos7840_port == NULL)
1724 /* FIXME: What locks the port registers ? */
1725 mcr = mos7840_port->shadowMCR;
1726 if (clear & TIOCM_RTS)
1728 if (clear & TIOCM_DTR)
1730 if (clear & TIOCM_LOOP)
1731 mcr &= ~MCR_LOOPBACK;
1733 if (set & TIOCM_RTS)
1735 if (set & TIOCM_DTR)
1737 if (set & TIOCM_LOOP)
1738 mcr |= MCR_LOOPBACK;
1740 mos7840_port->shadowMCR = mcr;
1742 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
1744 dbg("setting MODEM_CONTROL_REGISTER Failed");
1751 /*****************************************************************************
1752 * mos7840_calc_baud_rate_divisor
1753 * this function calculates the proper baud rate divisor for the specified
1755 *****************************************************************************/
1756 static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
1760 dbg("%s - %d", __func__, baudRate);
1762 if (baudRate <= 115200) {
1763 *divisor = 115200 / baudRate;
1766 if ((baudRate > 115200) && (baudRate <= 230400)) {
1767 *divisor = 230400 / baudRate;
1768 *clk_sel_val = 0x10;
1769 } else if ((baudRate > 230400) && (baudRate <= 403200)) {
1770 *divisor = 403200 / baudRate;
1771 *clk_sel_val = 0x20;
1772 } else if ((baudRate > 403200) && (baudRate <= 460800)) {
1773 *divisor = 460800 / baudRate;
1774 *clk_sel_val = 0x30;
1775 } else if ((baudRate > 460800) && (baudRate <= 806400)) {
1776 *divisor = 806400 / baudRate;
1777 *clk_sel_val = 0x40;
1778 } else if ((baudRate > 806400) && (baudRate <= 921600)) {
1779 *divisor = 921600 / baudRate;
1780 *clk_sel_val = 0x50;
1781 } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
1782 *divisor = 1572864 / baudRate;
1783 *clk_sel_val = 0x60;
1784 } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
1785 *divisor = 3145728 / baudRate;
1786 *clk_sel_val = 0x70;
1792 for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
1793 if (mos7840_divisor_table[i].BaudRate == baudrate) {
1794 *divisor = mos7840_divisor_table[i].Divisor;
1799 /* After trying for all the standard baud rates *
1800 * Try calculating the divisor for this baud rate */
1802 if (baudrate > 75 && baudrate < 230400) {
1803 /* get the divisor */
1804 custom = (__u16) (230400L / baudrate);
1806 /* Check for round off */
1807 round1 = (__u16) (2304000L / baudrate);
1808 round = (__u16) (round1 - (custom * 10));
1813 dbg(" Baud %d = %d", baudrate, custom);
1817 dbg("%s", " Baud calculation Failed...");
1822 /*****************************************************************************
1823 * mos7840_send_cmd_write_baud_rate
1824 * this function sends the proper command to change the baud rate of the
1826 *****************************************************************************/
1828 static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
1834 unsigned char number;
1836 struct usb_serial_port *port;
1838 if (mos7840_port == NULL)
1841 port = (struct usb_serial_port *)mos7840_port->port;
1842 if (mos7840_port_paranoia_check(port, __func__)) {
1843 dbg("%s", "Invalid port");
1847 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
1848 dbg("%s", "Invalid Serial");
1852 dbg("%s", "Entering ..........");
1854 number = mos7840_port->port->number - mos7840_port->port->serial->minor;
1856 dbg("%s - port = %d, baud = %d", __func__,
1857 mos7840_port->port->number, baudRate);
1858 /* reset clk_uart_sel in spregOffset */
1859 if (baudRate > 115200) {
1860 #ifdef HW_flow_control
1861 /* NOTE: need to see the pther register to modify */
1862 /* setting h/w flow control bit to 1 */
1864 mos7840_port->shadowMCR = Data;
1865 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1868 dbg("Writing spreg failed in set_serial_baud");
1874 #ifdef HW_flow_control
1875 /* setting h/w flow control bit to 0 */
1877 mos7840_port->shadowMCR = Data;
1878 status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
1881 dbg("Writing spreg failed in set_serial_baud");
1888 if (1) { /* baudRate <= 115200) */
1891 status = mos7840_calc_baud_rate_divisor(baudRate, &divisor,
1893 status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
1896 dbg("reading spreg failed in set_serial_baud");
1899 Data = (Data & 0x8f) | clk_sel_val;
1900 status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
1903 dbg("Writing spreg failed in set_serial_baud");
1906 /* Calculate the Divisor */
1909 dev_err(&port->dev, "%s - bad baud rate\n", __func__);
1912 /* Enable access to divisor latch */
1913 Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
1914 mos7840_port->shadowLCR = Data;
1915 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1917 /* Write the divisor */
1918 Data = (unsigned char)(divisor & 0xff);
1919 dbg("set_serial_baud Value to write DLL is %x", Data);
1920 mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
1922 Data = (unsigned char)((divisor & 0xff00) >> 8);
1923 dbg("set_serial_baud Value to write DLM is %x", Data);
1924 mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
1926 /* Disable access to divisor latch */
1927 Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
1928 mos7840_port->shadowLCR = Data;
1929 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
1935 /*****************************************************************************
1936 * mos7840_change_port_settings
1937 * This routine is called to set the UART on the device to match
1938 * the specified new settings.
1939 *****************************************************************************/
1941 static void mos7840_change_port_settings(struct tty_struct *tty,
1942 struct moschip_port *mos7840_port, struct ktermios *old_termios)
1952 struct usb_serial_port *port;
1953 struct usb_serial *serial;
1955 if (mos7840_port == NULL)
1958 port = (struct usb_serial_port *)mos7840_port->port;
1960 if (mos7840_port_paranoia_check(port, __func__)) {
1961 dbg("%s", "Invalid port");
1965 if (mos7840_serial_paranoia_check(port->serial, __func__)) {
1966 dbg("%s", "Invalid Serial");
1970 serial = port->serial;
1972 dbg("%s - port %d", __func__, mos7840_port->port->number);
1974 if (!mos7840_port->open) {
1975 dbg("%s - port not opened", __func__);
1979 dbg("%s", "Entering ..........");
1983 lParity = LCR_PAR_NONE;
1985 cflag = tty->termios->c_cflag;
1986 iflag = tty->termios->c_iflag;
1988 /* Change the number of bits */
1989 switch (cflag & CSIZE) {
2008 /* Change the Parity bit */
2009 if (cflag & PARENB) {
2010 if (cflag & PARODD) {
2011 lParity = LCR_PAR_ODD;
2012 dbg("%s - parity = odd", __func__);
2014 lParity = LCR_PAR_EVEN;
2015 dbg("%s - parity = even", __func__);
2019 dbg("%s - parity = none", __func__);
2023 lParity = lParity | 0x20;
2025 /* Change the Stop bit */
2026 if (cflag & CSTOPB) {
2028 dbg("%s - stop bits = 2", __func__);
2031 dbg("%s - stop bits = 1", __func__);
2034 /* Update the LCR with the correct value */
2035 mos7840_port->shadowLCR &=
2036 ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
2037 mos7840_port->shadowLCR |= (lData | lParity | lStop);
2039 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x",
2040 mos7840_port->shadowLCR);
2041 /* Disable Interrupts */
2043 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2046 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2049 mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
2051 /* Send the updated LCR value to the mos7840 */
2052 Data = mos7840_port->shadowLCR;
2054 mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
2057 mos7840_port->shadowMCR = Data;
2058 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2060 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2062 /* set up the MCR register and send it to the mos7840 */
2064 mos7840_port->shadowMCR = MCR_MASTER_IE;
2066 mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
2068 if (cflag & CRTSCTS)
2069 mos7840_port->shadowMCR |= (MCR_XON_ANY);
2071 mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
2073 Data = mos7840_port->shadowMCR;
2074 mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
2076 /* Determine divisor based on baud rate */
2077 baud = tty_get_baud_rate(tty);
2080 /* pick a default, any default... */
2081 dbg("%s", "Picked default baud...");
2085 dbg("%s - baud rate = %d", __func__, baud);
2086 status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
2088 /* Enable Interrupts */
2090 mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
2092 if (mos7840_port->read_urb_busy == false) {
2093 mos7840_port->read_urb->dev = serial->dev;
2094 mos7840_port->read_urb_busy = true;
2095 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2097 dbg("usb_submit_urb(read bulk) failed, status = %d",
2099 mos7840_port->read_urb_busy = false;
2102 dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x",
2103 mos7840_port->shadowLCR);
2106 /*****************************************************************************
2107 * mos7840_set_termios
2108 * this function is called by the tty driver when it wants to change
2109 * the termios structure
2110 *****************************************************************************/
2112 static void mos7840_set_termios(struct tty_struct *tty,
2113 struct usb_serial_port *port,
2114 struct ktermios *old_termios)
2118 struct usb_serial *serial;
2119 struct moschip_port *mos7840_port;
2120 dbg("mos7840_set_termios: START");
2121 if (mos7840_port_paranoia_check(port, __func__)) {
2122 dbg("%s", "Invalid port");
2126 serial = port->serial;
2128 if (mos7840_serial_paranoia_check(serial, __func__)) {
2129 dbg("%s", "Invalid Serial");
2133 mos7840_port = mos7840_get_port_private(port);
2135 if (mos7840_port == NULL)
2138 if (!mos7840_port->open) {
2139 dbg("%s - port not opened", __func__);
2143 dbg("%s", "setting termios - ");
2145 cflag = tty->termios->c_cflag;
2147 dbg("%s - clfag %08x iflag %08x", __func__,
2148 tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
2149 dbg("%s - old clfag %08x old iflag %08x", __func__,
2150 old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
2151 dbg("%s - port %d", __func__, port->number);
2153 /* change the port settings to the new ones specified */
2155 mos7840_change_port_settings(tty, mos7840_port, old_termios);
2157 if (!mos7840_port->read_urb) {
2158 dbg("%s", "URB KILLED !!!!!");
2162 if (mos7840_port->read_urb_busy == false) {
2163 mos7840_port->read_urb->dev = serial->dev;
2164 mos7840_port->read_urb_busy = true;
2165 status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
2167 dbg("usb_submit_urb(read bulk) failed, status = %d",
2169 mos7840_port->read_urb_busy = false;
2174 /*****************************************************************************
2175 * mos7840_get_lsr_info - get line status register info
2177 * Purpose: Let user call ioctl() to get info when the UART physically
2178 * is emptied. On bus types like RS485, the transmitter must
2179 * release the bus after transmitting. This must be done when
2180 * the transmit shift register is empty, not be done when the
2181 * transmit holding register is empty. This functionality
2182 * allows an RS485 driver to be written in user space.
2183 *****************************************************************************/
2185 static int mos7840_get_lsr_info(struct tty_struct *tty,
2186 unsigned int __user *value)
2189 unsigned int result = 0;
2191 count = mos7840_chars_in_buffer(tty);
2193 dbg("%s -- Empty", __func__);
2194 result = TIOCSER_TEMT;
2197 if (copy_to_user(value, &result, sizeof(int)))
2202 /*****************************************************************************
2203 * mos7840_get_serial_info
2204 * function to get information about serial port
2205 *****************************************************************************/
2207 static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
2208 struct serial_struct __user *retinfo)
2210 struct serial_struct tmp;
2212 if (mos7840_port == NULL)
2218 memset(&tmp, 0, sizeof(tmp));
2220 tmp.type = PORT_16550A;
2221 tmp.line = mos7840_port->port->serial->minor;
2222 tmp.port = mos7840_port->port->number;
2224 tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2225 tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
2226 tmp.baud_base = 9600;
2227 tmp.close_delay = 5 * HZ;
2228 tmp.closing_wait = 30 * HZ;
2230 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2235 static int mos7840_get_icount(struct tty_struct *tty,
2236 struct serial_icounter_struct *icount)
2238 struct usb_serial_port *port = tty->driver_data;
2239 struct moschip_port *mos7840_port;
2240 struct async_icount cnow;
2242 mos7840_port = mos7840_get_port_private(port);
2243 cnow = mos7840_port->icount;
2246 icount->cts = cnow.cts;
2247 icount->dsr = cnow.dsr;
2248 icount->rng = cnow.rng;
2249 icount->dcd = cnow.dcd;
2250 icount->rx = cnow.rx;
2251 icount->tx = cnow.tx;
2252 icount->frame = cnow.frame;
2253 icount->overrun = cnow.overrun;
2254 icount->parity = cnow.parity;
2255 icount->brk = cnow.brk;
2256 icount->buf_overrun = cnow.buf_overrun;
2258 dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __func__,
2259 port->number, icount->rx, icount->tx);
2263 /*****************************************************************************
2265 * this function handles any ioctl calls to the driver
2266 *****************************************************************************/
2268 static int mos7840_ioctl(struct tty_struct *tty,
2269 unsigned int cmd, unsigned long arg)
2271 struct usb_serial_port *port = tty->driver_data;
2272 void __user *argp = (void __user *)arg;
2273 struct moschip_port *mos7840_port;
2275 struct async_icount cnow;
2276 struct async_icount cprev;
2278 if (mos7840_port_paranoia_check(port, __func__)) {
2279 dbg("%s", "Invalid port");
2283 mos7840_port = mos7840_get_port_private(port);
2285 if (mos7840_port == NULL)
2288 dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
2291 /* return number of bytes available */
2294 dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
2295 return mos7840_get_lsr_info(tty, argp);
2298 dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
2299 return mos7840_get_serial_info(mos7840_port, argp);
2302 dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
2306 dbg("%s (%d) TIOCMIWAIT", __func__, port->number);
2307 cprev = mos7840_port->icount;
2309 /* interruptible_sleep_on(&mos7840_port->delta_msr_wait); */
2310 mos7840_port->delta_msr_cond = 0;
2311 wait_event_interruptible(port->delta_msr_wait,
2312 (port->serial->disconnected ||
2314 delta_msr_cond == 1));
2316 /* see if a signal did it */
2317 if (signal_pending(current))
2318 return -ERESTARTSYS;
2320 if (port->serial->disconnected)
2323 cnow = mos7840_port->icount;
2325 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2326 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2327 return -EIO; /* no change => error */
2328 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2329 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2330 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2331 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
2342 return -ENOIOCTLCMD;
2345 static int mos7840_calc_num_ports(struct usb_serial *serial)
2349 int mos7840_num_ports;
2351 ret = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
2352 MCS_RDREQ, MCS_RD_RTYPE, 0, GPIO_REGISTER, &Data,
2353 VENDOR_READ_LENGTH, MOS_WDR_TIMEOUT);
2355 if ((Data & 0x01) == 0) {
2356 mos7840_num_ports = 2;
2357 serial->num_bulk_in = 2;
2358 serial->num_bulk_out = 2;
2359 serial->num_ports = 2;
2361 mos7840_num_ports = 4;
2362 serial->num_bulk_in = 4;
2363 serial->num_bulk_out = 4;
2364 serial->num_ports = 4;
2367 return mos7840_num_ports;
2370 /****************************************************************************
2372 ****************************************************************************/
2374 static int mos7840_startup(struct usb_serial *serial)
2376 struct moschip_port *mos7840_port;
2377 struct usb_device *dev;
2381 dbg("%s", "mos7840_startup :Entering..........");
2384 dbg("%s", "Invalid Handler");
2388 if (serial->num_bulk_in < serial->num_ports ||
2389 serial->num_bulk_out < serial->num_ports ||
2390 serial->num_interrupt_in < 1) {
2391 dev_err(&serial->interface->dev, "missing endpoints\n");
2397 dbg("%s", "Entering...");
2398 dbg ("mos7840_startup: serial = %p", serial);
2400 /* we set up the pointers to the endpoints in the mos7840_open *
2401 * function, as the structures aren't created yet. */
2403 /* set up port private structures */
2404 for (i = 0; i < serial->num_ports; ++i) {
2405 dbg ("mos7840_startup: configuring port %d............", i);
2406 mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
2407 if (mos7840_port == NULL) {
2408 dev_err(&dev->dev, "%s - Out of memory\n", __func__);
2410 i--; /* don't follow NULL pointer cleaning up */
2414 /* Initialize all port interrupt end point to port 0 int
2415 * endpoint. Our device has only one interrupt end point
2416 * common to all port */
2418 mos7840_port->port = serial->port[i];
2419 mos7840_set_port_private(serial->port[i], mos7840_port);
2420 spin_lock_init(&mos7840_port->pool_lock);
2422 /* minor is not initialised until later by
2423 * usb-serial.c:get_free_serial() and cannot therefore be used
2424 * to index device instances */
2425 mos7840_port->port_num = i + 1;
2426 dbg ("serial->port[i]->number = %d", serial->port[i]->number);
2427 dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor);
2428 dbg ("mos7840_port->port_num = %d", mos7840_port->port_num);
2429 dbg ("serial->minor = %d", serial->minor);
2431 if (mos7840_port->port_num == 1) {
2432 mos7840_port->SpRegOffset = 0x0;
2433 mos7840_port->ControlRegOffset = 0x1;
2434 mos7840_port->DcrRegOffset = 0x4;
2435 } else if ((mos7840_port->port_num == 2)
2436 && (serial->num_ports == 4)) {
2437 mos7840_port->SpRegOffset = 0x8;
2438 mos7840_port->ControlRegOffset = 0x9;
2439 mos7840_port->DcrRegOffset = 0x16;
2440 } else if ((mos7840_port->port_num == 2)
2441 && (serial->num_ports == 2)) {
2442 mos7840_port->SpRegOffset = 0xa;
2443 mos7840_port->ControlRegOffset = 0xb;
2444 mos7840_port->DcrRegOffset = 0x19;
2445 } else if ((mos7840_port->port_num == 3)
2446 && (serial->num_ports == 4)) {
2447 mos7840_port->SpRegOffset = 0xa;
2448 mos7840_port->ControlRegOffset = 0xb;
2449 mos7840_port->DcrRegOffset = 0x19;
2450 } else if ((mos7840_port->port_num == 4)
2451 && (serial->num_ports == 4)) {
2452 mos7840_port->SpRegOffset = 0xc;
2453 mos7840_port->ControlRegOffset = 0xd;
2454 mos7840_port->DcrRegOffset = 0x1c;
2456 mos7840_dump_serial_port(mos7840_port);
2457 mos7840_set_port_private(serial->port[i], mos7840_port);
2459 /* enable rx_disable bit in control register */
2460 status = mos7840_get_reg_sync(serial->port[i],
2461 mos7840_port->ControlRegOffset, &Data);
2463 dbg("Reading ControlReg failed status-0x%x", status);
2466 dbg("ControlReg Reading success val is %x, status%d",
2468 Data |= 0x08; /* setting driver done bit */
2469 Data |= 0x04; /* sp1_bit to have cts change reflect in
2472 /* Data |= 0x20; //rx_disable bit */
2473 status = mos7840_set_reg_sync(serial->port[i],
2474 mos7840_port->ControlRegOffset, Data);
2476 dbg("Writing ControlReg failed(rx_disable) status-0x%x", status);
2479 dbg("ControlReg Writing success(rx_disable) status%d",
2482 /* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
2485 status = mos7840_set_reg_sync(serial->port[i],
2486 (__u16) (mos7840_port->DcrRegOffset + 0), Data);
2488 dbg("Writing DCR0 failed status-0x%x", status);
2491 dbg("DCR0 Writing success status%d", status);
2494 status = mos7840_set_reg_sync(serial->port[i],
2495 (__u16) (mos7840_port->DcrRegOffset + 1), Data);
2497 dbg("Writing DCR1 failed status-0x%x", status);
2500 dbg("DCR1 Writing success status%d", status);
2503 status = mos7840_set_reg_sync(serial->port[i],
2504 (__u16) (mos7840_port->DcrRegOffset + 2), Data);
2506 dbg("Writing DCR2 failed status-0x%x", status);
2509 dbg("DCR2 Writing success status%d", status);
2511 /* write values in clkstart0x0 and clkmulti 0x20 */
2513 status = mos7840_set_reg_sync(serial->port[i],
2514 CLK_START_VALUE_REGISTER, Data);
2516 dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x", status);
2519 dbg("CLK_START_VALUE_REGISTER Writing success status%d", status);
2522 status = mos7840_set_reg_sync(serial->port[i],
2523 CLK_MULTI_REGISTER, Data);
2525 dbg("Writing CLK_MULTI_REGISTER failed status-0x%x",
2529 dbg("CLK_MULTI_REGISTER Writing success status%d",
2532 /* write value 0x0 to scratchpad register */
2534 status = mos7840_set_uart_reg(serial->port[i],
2535 SCRATCH_PAD_REGISTER, Data);
2537 dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x",
2541 dbg("SCRATCH_PAD_REGISTER Writing success status%d",
2544 /* Zero Length flag register */
2545 if ((mos7840_port->port_num != 1)
2546 && (serial->num_ports == 2)) {
2549 status = mos7840_set_reg_sync(serial->port[i],
2551 ((__u16)mos7840_port->port_num)), Data);
2552 dbg("ZLIP offset %x",
2554 ((__u16) mos7840_port->port_num)));
2556 dbg("Writing ZLP_REG%d failed status-0x%x",
2560 dbg("ZLP_REG%d Writing success status%d",
2564 status = mos7840_set_reg_sync(serial->port[i],
2566 ((__u16)mos7840_port->port_num) - 0x1), Data);
2567 dbg("ZLIP offset %x",
2569 ((__u16) mos7840_port->port_num) - 0x1));
2571 dbg("Writing ZLP_REG%d failed status-0x%x",
2575 dbg("ZLP_REG%d Writing success status%d",
2579 mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
2580 mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
2581 mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
2583 if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
2584 !mos7840_port->dr) {
2589 dbg ("mos7840_startup: all ports configured...........");
2591 /* Zero Length flag enable */
2593 status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
2595 dbg("Writing ZLP_REG5 failed status-0x%x", status);
2598 dbg("ZLP_REG5 Writing success status%d", status);
2600 /* setting configuration feature to one */
2601 usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
2602 (__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
2605 for (/* nothing */; i >= 0; i--) {
2606 mos7840_port = mos7840_get_port_private(serial->port[i]);
2608 kfree(mos7840_port->dr);
2609 kfree(mos7840_port->ctrl_buf);
2610 usb_free_urb(mos7840_port->control_urb);
2611 kfree(mos7840_port);
2616 /****************************************************************************
2617 * mos7840_disconnect
2618 * This function is called whenever the device is removed from the usb bus.
2619 ****************************************************************************/
2621 static void mos7840_disconnect(struct usb_serial *serial)
2624 struct moschip_port *mos7840_port;
2625 dbg("%s", " disconnect :entering..........");
2628 dbg("%s", "Invalid Handler");
2632 /* check for the ports to be closed,close the ports and disconnect */
2634 /* free private structure allocated for serial port *
2635 * stop reads and writes on all ports */
2637 for (i = 0; i < serial->num_ports; ++i) {
2638 mos7840_port = mos7840_get_port_private(serial->port[i]);
2639 dbg ("mos7840_port %d = %p", i, mos7840_port);
2641 usb_kill_urb(mos7840_port->control_urb);
2645 dbg("%s", "Thank u :: ");
2649 /****************************************************************************
2651 * This function is called when the usb_serial structure is freed.
2652 ****************************************************************************/
2654 static void mos7840_release(struct usb_serial *serial)
2657 struct moschip_port *mos7840_port;
2658 dbg("%s", " release :entering..........");
2661 dbg("%s", "Invalid Handler");
2665 /* check for the ports to be closed,close the ports and disconnect */
2667 /* free private structure allocated for serial port *
2668 * stop reads and writes on all ports */
2670 for (i = 0; i < serial->num_ports; ++i) {
2671 mos7840_port = mos7840_get_port_private(serial->port[i]);
2672 dbg("mos7840_port %d = %p", i, mos7840_port);
2674 usb_free_urb(mos7840_port->control_urb);
2675 kfree(mos7840_port->ctrl_buf);
2676 kfree(mos7840_port->dr);
2677 kfree(mos7840_port);
2681 dbg("%s", "Thank u :: ");
2685 static struct usb_driver io_driver = {
2687 .probe = usb_serial_probe,
2688 .disconnect = usb_serial_disconnect,
2689 .id_table = moschip_id_table_combined,
2693 static struct usb_serial_driver moschip7840_4port_device = {
2695 .owner = THIS_MODULE,
2698 .description = DRIVER_DESC,
2699 .usb_driver = &io_driver,
2700 .id_table = moschip_port_id_table,
2702 .open = mos7840_open,
2703 .close = mos7840_close,
2704 .write = mos7840_write,
2705 .write_room = mos7840_write_room,
2706 .chars_in_buffer = mos7840_chars_in_buffer,
2707 .throttle = mos7840_throttle,
2708 .unthrottle = mos7840_unthrottle,
2709 .calc_num_ports = mos7840_calc_num_ports,
2710 #ifdef MCSSerialProbe
2711 .probe = mos7840_serial_probe,
2713 .ioctl = mos7840_ioctl,
2714 .set_termios = mos7840_set_termios,
2715 .break_ctl = mos7840_break,
2716 .tiocmget = mos7840_tiocmget,
2717 .tiocmset = mos7840_tiocmset,
2718 .get_icount = mos7840_get_icount,
2719 .attach = mos7840_startup,
2720 .disconnect = mos7840_disconnect,
2721 .release = mos7840_release,
2722 .read_bulk_callback = mos7840_bulk_in_callback,
2723 .read_int_callback = mos7840_interrupt_callback,
2726 /****************************************************************************
2728 * This is called by the module subsystem, or on startup to initialize us
2729 ****************************************************************************/
2730 static int __init moschip7840_init(void)
2734 dbg("%s", " mos7840_init :entering..........");
2736 /* Register with the usb serial */
2737 retval = usb_serial_register(&moschip7840_4port_device);
2740 goto failed_port_device_register;
2742 dbg("%s", "Entering...");
2743 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
2746 /* Register with the usb */
2747 retval = usb_register(&io_driver);
2749 dbg("%s", "Leaving...");
2752 usb_serial_deregister(&moschip7840_4port_device);
2753 failed_port_device_register:
2757 /****************************************************************************
2759 * Called when the driver is about to be unloaded.
2760 ****************************************************************************/
2761 static void __exit moschip7840_exit(void)
2764 dbg("%s", " mos7840_exit :entering..........");
2766 usb_deregister(&io_driver);
2768 usb_serial_deregister(&moschip7840_4port_device);
2770 dbg("%s", "Entering...");
2773 module_init(moschip7840_init);
2774 module_exit(moschip7840_exit);
2776 /* Module information */
2777 MODULE_DESCRIPTION(DRIVER_DESC);
2778 MODULE_LICENSE("GPL");
2780 module_param(debug, bool, S_IRUGO | S_IWUSR);
2781 MODULE_PARM_DESC(debug, "Debug enabled or not");