--- /dev/null
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Clean ups from Moschip version and a few ioctl implementations by:
+ * Paul B Schroeder <pschroeder "at" uplogix "dot" com>
+ *
+ * Originally based on drivers/usb/serial/io_edgeport.c which is:
+ * Copyright (C) 2000 Inside Out Networks, All rights reserved.
+ * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/tty.h>
+#include <linux/tty_driver.h>
+#include <linux/tty_flip.h>
+#include <linux/module.h>
+#include <linux/serial.h>
+#include <linux/usb.h>
+#include <linux/usb/serial.h>
+#include <asm/uaccess.h>
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "1.3.1"
+#define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
+
+/*
+ * 16C50 UART register defines
+ */
+
+#define LCR_BITS_5 0x00 /* 5 bits/char */
+#define LCR_BITS_6 0x01 /* 6 bits/char */
+#define LCR_BITS_7 0x02 /* 7 bits/char */
+#define LCR_BITS_8 0x03 /* 8 bits/char */
+#define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
+
+#define LCR_STOP_1 0x00 /* 1 stop bit */
+#define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
+#define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
+#define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
+
+#define LCR_PAR_NONE 0x00 /* No parity */
+#define LCR_PAR_ODD 0x08 /* Odd parity */
+#define LCR_PAR_EVEN 0x18 /* Even parity */
+#define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
+#define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
+#define LCR_PAR_MASK 0x38 /* Mask for parity field */
+
+#define LCR_SET_BREAK 0x40 /* Set Break condition */
+#define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
+
+#define MCR_DTR 0x01 /* Assert DTR */
+#define MCR_RTS 0x02 /* Assert RTS */
+#define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
+#define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
+#define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
+#define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
+
+#define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
+#define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
+#define MOS7840_MSR_RI 0x40 /* Current state of RI */
+#define MOS7840_MSR_CD 0x80 /* Current state of CD */
+
+/*
+ * Defines used for sending commands to port
+ */
+
+#define WAIT_FOR_EVER (HZ * 0 ) /* timeout urb is wait for ever */
+#define MOS_WDR_TIMEOUT (HZ * 5 ) /* default urb timeout */
+
+#define MOS_PORT1 0x0200
+#define MOS_PORT2 0x0300
+#define MOS_VENREG 0x0000
+#define MOS_MAX_PORT 0x02
+#define MOS_WRITE 0x0E
+#define MOS_READ 0x0D
+
+/* Requests */
+#define MCS_RD_RTYPE 0xC0
+#define MCS_WR_RTYPE 0x40
+#define MCS_RDREQ 0x0D
+#define MCS_WRREQ 0x0E
+#define MCS_CTRL_TIMEOUT 500
+#define VENDOR_READ_LENGTH (0x01)
+
+#define MAX_NAME_LEN 64
+
+#define ZLP_REG1 0x3A //Zero_Flag_Reg1 58
+#define ZLP_REG5 0x3E //Zero_Flag_Reg5 62
+
+/* For higher baud Rates use TIOCEXBAUD */
+#define TIOCEXBAUD 0x5462
+
+/* vendor id and device id defines */
+
+#define USB_VENDOR_ID_MOSCHIP 0x9710
+#define MOSCHIP_DEVICE_ID_7840 0x7840
+#define MOSCHIP_DEVICE_ID_7820 0x7820
+
+/* Interrupt Rotinue Defines */
+
+#define SERIAL_IIR_RLS 0x06
+#define SERIAL_IIR_MS 0x00
+
+/*
+ * Emulation of the bit mask on the LINE STATUS REGISTER.
+ */
+#define SERIAL_LSR_DR 0x0001
+#define SERIAL_LSR_OE 0x0002
+#define SERIAL_LSR_PE 0x0004
+#define SERIAL_LSR_FE 0x0008
+#define SERIAL_LSR_BI 0x0010
+
+#define MOS_MSR_DELTA_CTS 0x10
+#define MOS_MSR_DELTA_DSR 0x20
+#define MOS_MSR_DELTA_RI 0x40
+#define MOS_MSR_DELTA_CD 0x80
+
+// Serial Port register Address
+#define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
+#define FIFO_CONTROL_REGISTER ((__u16)(0x02))
+#define LINE_CONTROL_REGISTER ((__u16)(0x03))
+#define MODEM_CONTROL_REGISTER ((__u16)(0x04))
+#define LINE_STATUS_REGISTER ((__u16)(0x05))
+#define MODEM_STATUS_REGISTER ((__u16)(0x06))
+#define SCRATCH_PAD_REGISTER ((__u16)(0x07))
+#define DIVISOR_LATCH_LSB ((__u16)(0x00))
+#define DIVISOR_LATCH_MSB ((__u16)(0x01))
+
+#define CLK_MULTI_REGISTER ((__u16)(0x02))
+#define CLK_START_VALUE_REGISTER ((__u16)(0x03))
+
+#define SERIAL_LCR_DLAB ((__u16)(0x0080))
+
+/*
+ * URB POOL related defines
+ */
+#define NUM_URBS 16 /* URB Count */
+#define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
+
+
+static struct usb_device_id moschip_port_id_table[] = {
+ {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
+ {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
+ {} /* terminating entry */
+};
+
+static __devinitdata struct usb_device_id moschip_id_table_combined[] = {
+ {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
+ {USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
+ {} /* terminating entry */
+};
+
+MODULE_DEVICE_TABLE(usb, moschip_id_table_combined);
+
+/* This structure holds all of the local port information */
+
+struct moschip_port {
+ int port_num; /*Actual port number in the device(1,2,etc) */
+ struct urb *write_urb; /* write URB for this port */
+ struct urb *read_urb; /* read URB for this port */
+ __u8 shadowLCR; /* last LCR value received */
+ __u8 shadowMCR; /* last MCR value received */
+ char open;
+ wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
+ wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
+ int delta_msr_cond;
+ struct async_icount icount;
+ struct usb_serial_port *port; /* loop back to the owner of this object */
+
+ /*Offsets */
+ __u8 SpRegOffset;
+ __u8 ControlRegOffset;
+ __u8 DcrRegOffset;
+ //for processing control URBS in interrupt context
+ struct urb *control_urb;
+ char *ctrl_buf;
+ int MsrLsr;
+
+ struct urb *write_urb_pool[NUM_URBS];
+};
+
+
+static int debug;
+static int mos7840_num_ports; //this says the number of ports in the device
+static int mos7840_num_open_ports;
+
+
+/*
+ * mos7840_set_reg_sync
+ * To set the Control register by calling usb_fill_control_urb function
+ * by passing usb_sndctrlpipe function as parameter.
+ */
+
+static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
+ __u16 val)
+{
+ struct usb_device *dev = port->serial->dev;
+ val = val & 0x00ff;
+ dbg("mos7840_set_reg_sync offset is %x, value %x\n", reg, val);
+
+ return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
+ MCS_WR_RTYPE, val, reg, NULL, 0,
+ MOS_WDR_TIMEOUT);
+}
+
+/*
+ * mos7840_get_reg_sync
+ * To set the Uart register by calling usb_fill_control_urb function by
+ * passing usb_rcvctrlpipe function as parameter.
+ */
+
+static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
+ __u16 * val)
+{
+ struct usb_device *dev = port->serial->dev;
+ int ret = 0;
+
+ ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
+ MCS_RD_RTYPE, 0, reg, val, VENDOR_READ_LENGTH,
+ MOS_WDR_TIMEOUT);
+ dbg("mos7840_get_reg_sync offset is %x, return val %x\n", reg, *val);
+ *val = (*val) & 0x00ff;
+ return ret;
+}
+
+/*
+ * mos7840_set_uart_reg
+ * To set the Uart register by calling usb_fill_control_urb function by
+ * passing usb_sndctrlpipe function as parameter.
+ */
+
+static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
+ __u16 val)
+{
+
+ struct usb_device *dev = port->serial->dev;
+ val = val & 0x00ff;
+ // For the UART control registers, the application number need to be Or'ed
+ if (mos7840_num_ports == 4) {
+ val |=
+ (((__u16) port->number - (__u16) (port->serial->minor)) +
+ 1) << 8;
+ dbg("mos7840_set_uart_reg application number is %x\n", val);
+ } else {
+ if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
+ val |=
+ (((__u16) port->number -
+ (__u16) (port->serial->minor)) + 1) << 8;
+ dbg("mos7840_set_uart_reg application number is %x\n",
+ val);
+ } else {
+ val |=
+ (((__u16) port->number -
+ (__u16) (port->serial->minor)) + 2) << 8;
+ dbg("mos7840_set_uart_reg application number is %x\n",
+ val);
+ }
+ }
+ return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
+ MCS_WR_RTYPE, val, reg, NULL, 0,
+ MOS_WDR_TIMEOUT);
+
+}
+
+/*
+ * mos7840_get_uart_reg
+ * To set the Control register by calling usb_fill_control_urb function
+ * by passing usb_rcvctrlpipe function as parameter.
+ */
+static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
+ __u16 * val)
+{
+ struct usb_device *dev = port->serial->dev;
+ int ret = 0;
+ __u16 Wval;
+
+ //dbg("application number is %4x \n",(((__u16)port->number - (__u16)(port->serial->minor))+1)<<8);
+ /*Wval is same as application number */
+ if (mos7840_num_ports == 4) {
+ Wval =
+ (((__u16) port->number - (__u16) (port->serial->minor)) +
+ 1) << 8;
+ dbg("mos7840_get_uart_reg application number is %x\n", Wval);
+ } else {
+ if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
+ Wval =
+ (((__u16) port->number -
+ (__u16) (port->serial->minor)) + 1) << 8;
+ dbg("mos7840_get_uart_reg application number is %x\n",
+ Wval);
+ } else {
+ Wval =
+ (((__u16) port->number -
+ (__u16) (port->serial->minor)) + 2) << 8;
+ dbg("mos7840_get_uart_reg application number is %x\n",
+ Wval);
+ }
+ }
+ ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
+ MCS_RD_RTYPE, Wval, reg, val, VENDOR_READ_LENGTH,
+ MOS_WDR_TIMEOUT);
+ *val = (*val) & 0x00ff;
+ return ret;
+}
+
+static void mos7840_dump_serial_port(struct moschip_port *mos7840_port)
+{
+
+ dbg("***************************************\n");
+ dbg("SpRegOffset is %2x\n", mos7840_port->SpRegOffset);
+ dbg("ControlRegOffset is %2x \n", mos7840_port->ControlRegOffset);
+ dbg("DCRRegOffset is %2x \n", mos7840_port->DcrRegOffset);
+ dbg("***************************************\n");
+
+}
+
+/************************************************************************/
+/************************************************************************/
+/* I N T E R F A C E F U N C T I O N S */
+/* I N T E R F A C E F U N C T I O N S */
+/************************************************************************/
+/************************************************************************/
+
+static inline void mos7840_set_port_private(struct usb_serial_port *port,
+ struct moschip_port *data)
+{
+ usb_set_serial_port_data(port, (void *)data);
+}
+
+static inline struct moschip_port *mos7840_get_port_private(struct
+ usb_serial_port
+ *port)
+{
+ return (struct moschip_port *)usb_get_serial_port_data(port);
+}
+
+static int mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
+{
+ struct moschip_port *mos7840_port;
+ struct async_icount *icount;
+ mos7840_port = port;
+ icount = &mos7840_port->icount;
+ if (new_msr &
+ (MOS_MSR_DELTA_CTS | MOS_MSR_DELTA_DSR | MOS_MSR_DELTA_RI |
+ MOS_MSR_DELTA_CD)) {
+ icount = &mos7840_port->icount;
+
+ /* update input line counters */
+ if (new_msr & MOS_MSR_DELTA_CTS) {
+ icount->cts++;
+ }
+ if (new_msr & MOS_MSR_DELTA_DSR) {
+ icount->dsr++;
+ }
+ if (new_msr & MOS_MSR_DELTA_CD) {
+ icount->dcd++;
+ }
+ if (new_msr & MOS_MSR_DELTA_RI) {
+ icount->rng++;
+ }
+ }
+
+ return 0;
+}
+
+static int mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
+{
+ struct async_icount *icount;
+
+ dbg("%s - %02x", __FUNCTION__, new_lsr);
+
+ if (new_lsr & SERIAL_LSR_BI) {
+ //
+ // Parity and Framing errors only count if they
+ // occur exclusive of a break being
+ // received.
+ //
+ new_lsr &= (__u8) (SERIAL_LSR_OE | SERIAL_LSR_BI);
+ }
+
+ /* update input line counters */
+ icount = &port->icount;
+ if (new_lsr & SERIAL_LSR_BI) {
+ icount->brk++;
+ }
+ if (new_lsr & SERIAL_LSR_OE) {
+ icount->overrun++;
+ }
+ if (new_lsr & SERIAL_LSR_PE) {
+ icount->parity++;
+ }
+ if (new_lsr & SERIAL_LSR_FE) {
+ icount->frame++;
+ }
+
+ return 0;
+}
+
+/************************************************************************/
+/************************************************************************/
+/* U S B C A L L B A C K F U N C T I O N S */
+/* U S B C A L L B A C K F U N C T I O N S */
+/************************************************************************/
+/************************************************************************/
+
+static void mos7840_control_callback(struct urb *urb, struct pt_regs *regs)
+{
+ unsigned char *data;
+ struct moschip_port *mos7840_port;
+ __u8 regval = 0x0;
+
+ if (!urb) {
+ dbg("%s", "Invalid Pointer !!!!:\n");
+ return;
+ }
+
+ switch (urb->status) {
+ case 0:
+ /* success */
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ /* this urb is terminated, clean up */
+ dbg("%s - urb shutting down with status: %d", __FUNCTION__,
+ urb->status);
+ return;
+ default:
+ dbg("%s - nonzero urb status received: %d", __FUNCTION__,
+ urb->status);
+ goto exit;
+ }
+
+ mos7840_port = (struct moschip_port *)urb->context;
+
+ dbg("%s urb buffer size is %d\n", __FUNCTION__, urb->actual_length);
+ dbg("%s mos7840_port->MsrLsr is %d port %d\n", __FUNCTION__,
+ mos7840_port->MsrLsr, mos7840_port->port_num);
+ data = urb->transfer_buffer;
+ regval = (__u8) data[0];
+ dbg("%s data is %x\n", __FUNCTION__, regval);
+ if (mos7840_port->MsrLsr == 0)
+ mos7840_handle_new_msr(mos7840_port, regval);
+ else if (mos7840_port->MsrLsr == 1)
+ mos7840_handle_new_lsr(mos7840_port, regval);
+
+ exit:
+ return;
+}
+
+static int mos7840_get_reg(struct moschip_port *mcs, __u16 Wval, __u16 reg,
+ __u16 * val)
+{
+ struct usb_device *dev = mcs->port->serial->dev;
+ struct usb_ctrlrequest *dr = NULL;
+ unsigned char *buffer = NULL;
+ int ret = 0;
+ buffer = (__u8 *) mcs->ctrl_buf;
+
+// dr=(struct usb_ctrlrequest *)(buffer);
+ dr = (void *)(buffer + 2);
+ dr->bRequestType = MCS_RD_RTYPE;
+ dr->bRequest = MCS_RDREQ;
+ dr->wValue = cpu_to_le16(Wval); //0;
+ dr->wIndex = cpu_to_le16(reg);
+ dr->wLength = cpu_to_le16(2);
+
+ usb_fill_control_urb(mcs->control_urb, dev, usb_rcvctrlpipe(dev, 0),
+ (unsigned char *)dr, buffer, 2,
+ mos7840_control_callback, mcs);
+ mcs->control_urb->transfer_buffer_length = 2;
+ ret = usb_submit_urb(mcs->control_urb, GFP_ATOMIC);
+ return ret;
+}
+
+/*****************************************************************************
+ * mos7840_interrupt_callback
+ * this is the callback function for when we have received data on the
+ * interrupt endpoint.
+ *****************************************************************************/
+
+static void mos7840_interrupt_callback(struct urb *urb, struct pt_regs *regs)
+{
+ int result;
+ int length;
+ struct moschip_port *mos7840_port;
+ struct usb_serial *serial;
+ __u16 Data;
+ unsigned char *data;
+ __u8 sp[5], st;
+ int i;
+ __u16 wval;
+
+ dbg("%s", " : Entering\n");
+ if (!urb) {
+ dbg("%s", "Invalid Pointer !!!!:\n");
+ return;
+ }
+
+ switch (urb->status) {
+ case 0:
+ /* success */
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ /* this urb is terminated, clean up */
+ dbg("%s - urb shutting down with status: %d", __FUNCTION__,
+ urb->status);
+ return;
+ default:
+ dbg("%s - nonzero urb status received: %d", __FUNCTION__,
+ urb->status);
+ goto exit;
+ }
+
+ length = urb->actual_length;
+ data = urb->transfer_buffer;
+
+ serial = (struct usb_serial *)urb->context;
+
+ /* Moschip get 5 bytes
+ * Byte 1 IIR Port 1 (port.number is 0)
+ * Byte 2 IIR Port 2 (port.number is 1)
+ * Byte 3 IIR Port 3 (port.number is 2)
+ * Byte 4 IIR Port 4 (port.number is 3)
+ * Byte 5 FIFO status for both */
+
+ if (length && length > 5) {
+ dbg("%s \n", "Wrong data !!!");
+ return;
+ }
+
+ sp[0] = (__u8) data[0];
+ sp[1] = (__u8) data[1];
+ sp[2] = (__u8) data[2];
+ sp[3] = (__u8) data[3];
+ st = (__u8) data[4];
+
+ for (i = 0; i < serial->num_ports; i++) {
+ mos7840_port = mos7840_get_port_private(serial->port[i]);
+ wval =
+ (((__u16) serial->port[i]->number -
+ (__u16) (serial->minor)) + 1) << 8;
+ if (mos7840_port->open) {
+ if (sp[i] & 0x01) {
+ dbg("SP%d No Interrupt !!!\n", i);
+ } else {
+ switch (sp[i] & 0x0f) {
+ case SERIAL_IIR_RLS:
+ dbg("Serial Port %d: Receiver status error or ", i);
+ dbg("address bit detected in 9-bit mode\n");
+ mos7840_port->MsrLsr = 1;
+ mos7840_get_reg(mos7840_port, wval,
+ LINE_STATUS_REGISTER,
+ &Data);
+ break;
+ case SERIAL_IIR_MS:
+ dbg("Serial Port %d: Modem status change\n", i);
+ mos7840_port->MsrLsr = 0;
+ mos7840_get_reg(mos7840_port, wval,
+ MODEM_STATUS_REGISTER,
+ &Data);
+ break;
+ }
+ }
+ }
+ }
+ exit:
+ result = usb_submit_urb(urb, GFP_ATOMIC);
+ if (result) {
+ dev_err(&urb->dev->dev,
+ "%s - Error %d submitting interrupt urb\n",
+ __FUNCTION__, result);
+ }
+
+ return;
+
+}
+
+static int mos7840_port_paranoia_check(struct usb_serial_port *port,
+ const char *function)
+{
+ if (!port) {
+ dbg("%s - port == NULL", function);
+ return -1;
+ }
+ if (!port->serial) {
+ dbg("%s - port->serial == NULL", function);
+ return -1;
+ }
+
+ return 0;
+}
+
+/* Inline functions to check the sanity of a pointer that is passed to us */
+static int mos7840_serial_paranoia_check(struct usb_serial *serial,
+ const char *function)
+{
+ if (!serial) {
+ dbg("%s - serial == NULL", function);
+ return -1;
+ }
+ if (!serial->type) {
+ dbg("%s - serial->type == NULL!", function);
+ return -1;
+ }
+
+ return 0;
+}
+
+static struct usb_serial *mos7840_get_usb_serial(struct usb_serial_port *port,
+ const char *function)
+{
+ /* if no port was specified, or it fails a paranoia check */
+ if (!port ||
+ mos7840_port_paranoia_check(port, function) ||
+ mos7840_serial_paranoia_check(port->serial, function)) {
+ /* then say that we don't have a valid usb_serial thing, which will * end up genrating -ENODEV return values */
+ return NULL;
+ }
+
+ return port->serial;
+}
+
+/*****************************************************************************
+ * mos7840_bulk_in_callback
+ * this is the callback function for when we have received data on the
+ * bulk in endpoint.
+ *****************************************************************************/
+
+static void mos7840_bulk_in_callback(struct urb *urb, struct pt_regs *regs)
+{
+ int status;
+ unsigned char *data;
+ struct usb_serial *serial;
+ struct usb_serial_port *port;
+ struct moschip_port *mos7840_port;
+ struct tty_struct *tty;
+
+ if (!urb) {
+ dbg("%s", "Invalid Pointer !!!!:\n");
+ return;
+ }
+
+ if (urb->status) {
+ dbg("nonzero read bulk status received: %d", urb->status);
+ return;
+ }
+
+ mos7840_port = (struct moschip_port *)urb->context;
+ if (!mos7840_port) {
+ dbg("%s", "NULL mos7840_port pointer \n");
+ return;
+ }
+
+ port = (struct usb_serial_port *)mos7840_port->port;
+ if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
+ dbg("%s", "Port Paranoia failed \n");
+ return;
+ }
+
+ serial = mos7840_get_usb_serial(port, __FUNCTION__);
+ if (!serial) {
+ dbg("%s\n", "Bad serial pointer ");
+ return;
+ }
+
+ dbg("%s\n", "Entering... \n");
+
+ data = urb->transfer_buffer;
+
+ dbg("%s", "Entering ........... \n");
+
+ if (urb->actual_length) {
+ tty = mos7840_port->port->tty;
+ if (tty) {
+ tty_buffer_request_room(tty, urb->actual_length);
+ tty_insert_flip_string(tty, data, urb->actual_length);
+ dbg(" %s \n", data);
+ tty_flip_buffer_push(tty);
+ }
+ mos7840_port->icount.rx += urb->actual_length;
+ dbg("mos7840_port->icount.rx is %d:\n",
+ mos7840_port->icount.rx);
+ }
+
+ if (!mos7840_port->read_urb) {
+ dbg("%s", "URB KILLED !!!\n");
+ return;
+ }
+
+ if (mos7840_port->read_urb->status != -EINPROGRESS) {
+ mos7840_port->read_urb->dev = serial->dev;
+
+ status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
+
+ if (status) {
+ dbg(" usb_submit_urb(read bulk) failed, status = %d",
+ status);
+ }
+ }
+}
+
+/*****************************************************************************
+ * mos7840_bulk_out_data_callback
+ * this is the callback function for when we have finished sending serial data
+ * on the bulk out endpoint.
+ *****************************************************************************/
+
+static void mos7840_bulk_out_data_callback(struct urb *urb,
+ struct pt_regs *regs)
+{
+ struct moschip_port *mos7840_port;
+ struct tty_struct *tty;
+ if (!urb) {
+ dbg("%s", "Invalid Pointer !!!!:\n");
+ return;
+ }
+
+ if (urb->status) {
+ dbg("nonzero write bulk status received:%d\n", urb->status);
+ return;
+ }
+
+ mos7840_port = (struct moschip_port *)urb->context;
+ if (!mos7840_port) {
+ dbg("%s", "NULL mos7840_port pointer \n");
+ return;
+ }
+
+ if (mos7840_port_paranoia_check(mos7840_port->port, __FUNCTION__)) {
+ dbg("%s", "Port Paranoia failed \n");
+ return;
+ }
+
+ dbg("%s \n", "Entering .........");
+
+ tty = mos7840_port->port->tty;
+
+ if (tty && mos7840_port->open) {
+ /* let the tty driver wakeup if it has a special *
+ * write_wakeup function */
+
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP))
+ && tty->ldisc.write_wakeup) {
+ (tty->ldisc.write_wakeup) (tty);
+ }
+
+ /* tell the tty driver that something has changed */
+ wake_up_interruptible(&tty->write_wait);
+ }
+
+}
+
+/************************************************************************/
+/* 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 */
+/************************************************************************/
+#ifdef MCSSerialProbe
+static int mos7840_serial_probe(struct usb_serial *serial,
+ const struct usb_device_id *id)
+{
+
+ /*need to implement the mode_reg reading and updating\
+ structures usb_serial_ device_type\
+ (i.e num_ports, num_bulkin,bulkout etc) */
+ /* Also we can update the changes attach */
+ return 1;
+}
+#endif
+
+/*****************************************************************************
+ * mos7840_open
+ * this function is called by the tty driver when a port is opened
+ * If successful, we return 0
+ * Otherwise we return a negative error number.
+ *****************************************************************************/
+
+static int mos7840_open(struct usb_serial_port *port, struct file *filp)
+{
+ int response;
+ int j;
+ struct usb_serial *serial;
+ struct urb *urb;
+ __u16 Data;
+ int status;
+ struct moschip_port *mos7840_port;
+
+ if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
+ dbg("%s", "Port Paranoia failed \n");
+ return -ENODEV;
+ }
+
+ mos7840_num_open_ports++;
+ serial = port->serial;
+
+ if (mos7840_serial_paranoia_check(serial, __FUNCTION__)) {
+ dbg("%s", "Serial Paranoia failed \n");
+ return -ENODEV;
+ }
+
+ mos7840_port = mos7840_get_port_private(port);
+
+ if (mos7840_port == NULL)
+ return -ENODEV;
+
+ usb_clear_halt(serial->dev, port->write_urb->pipe);
+ usb_clear_halt(serial->dev, port->read_urb->pipe);
+
+ /* Initialising the write urb pool */
+ for (j = 0; j < NUM_URBS; ++j) {
+ urb = usb_alloc_urb(0, SLAB_ATOMIC);
+ mos7840_port->write_urb_pool[j] = urb;
+
+ if (urb == NULL) {
+ err("No more urbs???");
+ continue;
+ }
+
+ urb->transfer_buffer = NULL;
+ urb->transfer_buffer =
+ kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
+ if (!urb->transfer_buffer) {
+ err("%s-out of memory for urb buffers.", __FUNCTION__);
+ continue;
+ }
+ }
+
+/*****************************************************************************
+ * Initialize MCS7840 -- Write Init values to corresponding Registers
+ *
+ * Register Index
+ * 1 : IER
+ * 2 : FCR
+ * 3 : LCR
+ * 4 : MCR
+ *
+ * 0x08 : SP1/2 Control Reg
+ *****************************************************************************/
+
+//NEED to check the following Block
+
+ status = 0;
+ Data = 0x0;
+ status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
+ if (status < 0) {
+ dbg("Reading Spreg failed\n");
+ return -1;
+ }
+ Data |= 0x80;
+ status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
+ if (status < 0) {
+ dbg("writing Spreg failed\n");
+ return -1;
+ }
+
+ Data &= ~0x80;
+ status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
+ if (status < 0) {
+ dbg("writing Spreg failed\n");
+ return -1;
+ }
+//End of block to be checked
+
+ status = 0;
+ Data = 0x0;
+ status =
+ mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data);
+ if (status < 0) {
+ dbg("Reading Controlreg failed\n");
+ return -1;
+ }
+ Data |= 0x08; //Driver done bit
+ Data |= 0x20; //rx_disable
+ status = 0;
+ status =
+ mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data);
+ if (status < 0) {
+ dbg("writing Controlreg failed\n");
+ return -1;
+ }
+ //do register settings here
+ // Set all regs to the device default values.
+ ////////////////////////////////////
+ // First Disable all interrupts.
+ ////////////////////////////////////
+
+ Data = 0x00;
+ status = 0;
+ status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
+ if (status < 0) {
+ dbg("disableing interrupts failed\n");
+ return -1;
+ }
+ // Set FIFO_CONTROL_REGISTER to the default value
+ Data = 0x00;
+ status = 0;
+ status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
+ if (status < 0) {
+ dbg("Writing FIFO_CONTROL_REGISTER failed\n");
+ return -1;
+ }
+
+ Data = 0xcf;
+ status = 0;
+ status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
+ if (status < 0) {
+ dbg("Writing FIFO_CONTROL_REGISTER failed\n");
+ return -1;
+ }
+
+ Data = 0x03;
+ status = 0;
+ status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
+ mos7840_port->shadowLCR = Data;
+
+ Data = 0x0b;
+ status = 0;
+ status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
+ mos7840_port->shadowMCR = Data;
+
+ Data = 0x00;
+ status = 0;
+ status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
+ mos7840_port->shadowLCR = Data;
+
+ Data |= SERIAL_LCR_DLAB; //data latch enable in LCR 0x80
+ status = 0;
+ status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
+
+ Data = 0x0c;
+ status = 0;
+ status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
+
+ Data = 0x0;
+ status = 0;
+ status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
+
+ Data = 0x00;
+ status = 0;
+ status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
+
+ Data = Data & ~SERIAL_LCR_DLAB;
+ status = 0;
+ status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
+ mos7840_port->shadowLCR = Data;
+
+ //clearing Bulkin and Bulkout Fifo
+ Data = 0x0;
+ status = 0;
+ status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
+
+ Data = Data | 0x0c;
+ status = 0;
+ status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
+
+ Data = Data & ~0x0c;
+ status = 0;
+ status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
+ //Finally enable all interrupts
+ Data = 0x0;
+ Data = 0x0c;
+ status = 0;
+ status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
+
+ //clearing rx_disable
+ Data = 0x0;
+ status = 0;
+ status =
+ mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data);
+ Data = Data & ~0x20;
+ status = 0;
+ status =
+ mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data);
+
+ // rx_negate
+ Data = 0x0;
+ status = 0;
+ status =
+ mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset, &Data);
+ Data = Data | 0x10;
+ status = 0;
+ status =
+ mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset, Data);
+
+ /* force low_latency on so that our tty_push actually forces *
+ * the data through,otherwise it is scheduled, and with *
+ * high data rates (like with OHCI) data can get lost. */
+
+ if (port->tty)
+ port->tty->low_latency = 1;
+/* Check to see if we've set up our endpoint info yet *
+ * (can't set it up in mos7840_startup as the structures *
+ * were not set up at that time.) */
+ if (mos7840_num_open_ports == 1) {
+ if (serial->port[0]->interrupt_in_buffer == NULL) {
+
+ /* set up interrupt urb */
+
+ usb_fill_int_urb(serial->port[0]->interrupt_in_urb,
+ serial->dev,
+ usb_rcvintpipe(serial->dev,
+ serial->port[0]->
+ interrupt_in_endpointAddress),
+ serial->port[0]->interrupt_in_buffer,
+ serial->port[0]->interrupt_in_urb->
+ transfer_buffer_length,
+ mos7840_interrupt_callback,
+ serial,
+ serial->port[0]->interrupt_in_urb->
+ interval);
+
+ /* start interrupt read for mos7840 *
+ * will continue as long as mos7840 is connected */
+
+ response =
+ usb_submit_urb(serial->port[0]->interrupt_in_urb,
+ GFP_KERNEL);
+ if (response) {
+ err("%s - Error %d submitting interrupt urb",
+ __FUNCTION__, response);
+ }
+
+ }
+
+ }
+
+ /* see if we've set up our endpoint info yet *
+ * (can't set it up in mos7840_startup as the *
+ * structures were not set up at that time.) */
+
+ dbg("port number is %d \n", port->number);
+ dbg("serial number is %d \n", port->serial->minor);
+ dbg("Bulkin endpoint is %d \n", port->bulk_in_endpointAddress);
+ dbg("BulkOut endpoint is %d \n", port->bulk_out_endpointAddress);
+ dbg("Interrupt endpoint is %d \n", port->interrupt_in_endpointAddress);
+ dbg("port's number in the device is %d\n", mos7840_port->port_num);
+ mos7840_port->read_urb = port->read_urb;
+
+ /* set up our bulk in urb */
+
+ usb_fill_bulk_urb(mos7840_port->read_urb,
+ serial->dev,
+ usb_rcvbulkpipe(serial->dev,
+ port->bulk_in_endpointAddress),
+ port->bulk_in_buffer,
+ mos7840_port->read_urb->transfer_buffer_length,
+ mos7840_bulk_in_callback, mos7840_port);
+
+ dbg("mos7840_open: bulkin endpoint is %d\n",
+ port->bulk_in_endpointAddress);
+ response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
+ if (response) {
+ err("%s - Error %d submitting control urb", __FUNCTION__,
+ response);
+ }
+
+ /* initialize our wait queues */
+ init_waitqueue_head(&mos7840_port->wait_chase);
+ init_waitqueue_head(&mos7840_port->delta_msr_wait);
+
+ /* initialize our icount structure */
+ memset(&(mos7840_port->icount), 0x00, sizeof(mos7840_port->icount));
+
+ /* initialize our port settings */
+ mos7840_port->shadowMCR = MCR_MASTER_IE; /* Must set to enable ints! */
+ /* send a open port command */
+ mos7840_port->open = 1;
+ //mos7840_change_port_settings(mos7840_port,old_termios);
+ mos7840_port->icount.tx = 0;
+ mos7840_port->icount.rx = 0;
+
+ dbg("\n\nusb_serial serial:%x mos7840_port:%x\n usb_serial_port port:%x\n\n", (unsigned int)serial, (unsigned int)mos7840_port, (unsigned int)port);
+
+ return 0;
+
+}
+
+/*****************************************************************************
+ * mos7840_chars_in_buffer
+ * this function is called by the tty driver when it wants to know how many
+ * bytes of data we currently have outstanding in the port (data that has
+ * been written, but hasn't made it out the port yet)
+ * If successful, we return the number of bytes left to be written in the
+ * system,
+ * Otherwise we return a negative error number.
+ *****************************************************************************/
+
+static int mos7840_chars_in_buffer(struct usb_serial_port *port)
+{
+ int i;
+ int chars = 0;
+ struct moschip_port *mos7840_port;
+
+ dbg("%s \n", " mos7840_chars_in_buffer:entering ...........");
+
+ if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
+ dbg("%s", "Invalid port \n");
+ return -1;
+ }
+
+ mos7840_port = mos7840_get_port_private(port);
+ if (mos7840_port == NULL) {
+ dbg("%s \n", "mos7840_break:leaving ...........");
+ return -1;
+ }
+
+ for (i = 0; i < NUM_URBS; ++i) {
+ if (mos7840_port->write_urb_pool[i]->status == -EINPROGRESS) {
+ chars += URB_TRANSFER_BUFFER_SIZE;
+ }
+ }
+ dbg("%s - returns %d", __FUNCTION__, chars);
+ return (chars);
+
+}
+
+/************************************************************************
+ *
+ * mos7840_block_until_tx_empty
+ *
+ * This function will block the close until one of the following:
+ * 1. TX count are 0
+ * 2. The mos7840 has stopped
+ * 3. A timout of 3 seconds without activity has expired
+ *
+ ************************************************************************/
+static void mos7840_block_until_tx_empty(struct moschip_port *mos7840_port)
+{
+ int timeout = HZ / 10;
+ int wait = 30;
+ int count;
+
+ while (1) {
+
+ count = mos7840_chars_in_buffer(mos7840_port->port);
+
+ /* Check for Buffer status */
+ if (count <= 0) {
+ return;
+ }
+
+ /* Block the thread for a while */
+ interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
+ timeout);
+
+ /* No activity.. count down section */
+ wait--;
+ if (wait == 0) {
+ dbg("%s - TIMEOUT", __FUNCTION__);
+ return;
+ } else {
+ /* Reset timout value back to seconds */
+ wait = 30;
+ }
+ }
+}
+
+/*****************************************************************************
+ * mos7840_close
+ * this function is called by the tty driver when a port is closed
+ *****************************************************************************/
+
+static void mos7840_close(struct usb_serial_port *port, struct file *filp)
+{
+ struct usb_serial *serial;
+ struct moschip_port *mos7840_port;
+ int j;
+ __u16 Data;
+
+ dbg("%s\n", "mos7840_close:entering...");
+
+ if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
+ dbg("%s", "Port Paranoia failed \n");
+ return;
+ }
+
+ serial = mos7840_get_usb_serial(port, __FUNCTION__);
+ if (!serial) {
+ dbg("%s", "Serial Paranoia failed \n");
+ return;
+ }
+
+ mos7840_port = mos7840_get_port_private(port);
+
+ if (mos7840_port == NULL) {
+ return;
+ }
+
+ for (j = 0; j < NUM_URBS; ++j)
+ usb_kill_urb(mos7840_port->write_urb_pool[j]);
+
+ /* Freeing Write URBs */
+ for (j = 0; j < NUM_URBS; ++j) {
+ if (mos7840_port->write_urb_pool[j]) {
+ if (mos7840_port->write_urb_pool[j]->transfer_buffer)
+ kfree(mos7840_port->write_urb_pool[j]->
+ transfer_buffer);
+
+ usb_free_urb(mos7840_port->write_urb_pool[j]);
+ }
+ }
+
+ if (serial->dev) {
+ /* flush and block until tx is empty */
+ mos7840_block_until_tx_empty(mos7840_port);
+ }
+
+ /* While closing port, shutdown all bulk read, write *
+ * and interrupt read if they exists */
+ if (serial->dev) {
+
+ if (mos7840_port->write_urb) {
+ dbg("%s", "Shutdown bulk write\n");
+ usb_kill_urb(mos7840_port->write_urb);
+ }
+
+ if (mos7840_port->read_urb) {
+ dbg("%s", "Shutdown bulk read\n");
+ usb_kill_urb(mos7840_port->read_urb);
+ }
+ if ((&mos7840_port->control_urb)) {
+ dbg("%s", "Shutdown control read\n");
+ // usb_kill_urb (mos7840_port->control_urb);
+
+ }
+ }
+// if(mos7840_port->ctrl_buf != NULL)
+// kfree(mos7840_port->ctrl_buf);
+ mos7840_num_open_ports--;
+ dbg("mos7840_num_open_ports in close%d:in port%d\n",
+ mos7840_num_open_ports, port->number);
+ if (mos7840_num_open_ports == 0) {
+ if (serial->port[0]->interrupt_in_urb) {
+ dbg("%s", "Shutdown interrupt_in_urb\n");
+ }
+ }
+
+ if (mos7840_port->write_urb) {
+ /* if this urb had a transfer buffer already (old tx) free it */
+
+ if (mos7840_port->write_urb->transfer_buffer != NULL) {
+ kfree(mos7840_port->write_urb->transfer_buffer);
+ }
+ usb_free_urb(mos7840_port->write_urb);
+ }
+
+ Data = 0x0;
+ mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
+
+ Data = 0x00;
+ mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
+
+ mos7840_port->open = 0;
+
+ dbg("%s \n", "Leaving ............");
+}
+
+/************************************************************************
+ *
+ * mos7840_block_until_chase_response
+ *
+ * This function will block the close until one of the following:
+ * 1. Response to our Chase comes from mos7840
+ * 2. A timout of 10 seconds without activity has expired
+ * (1K of mos7840 data @ 2400 baud ==> 4 sec to empty)
+ *
+ ************************************************************************/
+
+static void mos7840_block_until_chase_response(struct moschip_port
+ *mos7840_port)
+{
+ int timeout = 1 * HZ;
+ int wait = 10;
+ int count;
+
+ while (1) {
+ count = mos7840_chars_in_buffer(mos7840_port->port);
+
+ /* Check for Buffer status */
+ if (count <= 0) {
+ return;
+ }
+
+ /* Block the thread for a while */
+ interruptible_sleep_on_timeout(&mos7840_port->wait_chase,
+ timeout);
+ /* No activity.. count down section */
+ wait--;
+ if (wait == 0) {
+ dbg("%s - TIMEOUT", __FUNCTION__);
+ return;
+ } else {
+ /* Reset timout value back to seconds */
+ wait = 10;
+ }
+ }
+
+}
+
+/*****************************************************************************
+ * mos7840_break
+ * this function sends a break to the port
+ *****************************************************************************/
+static void mos7840_break(struct usb_serial_port *port, int break_state)
+{
+ unsigned char data;
+ struct usb_serial *serial;
+ struct moschip_port *mos7840_port;
+
+ dbg("%s \n", "Entering ...........");
+ dbg("mos7840_break: Start\n");
+
+ if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
+ dbg("%s", "Port Paranoia failed \n");
+ return;
+ }
+
+ serial = mos7840_get_usb_serial(port, __FUNCTION__);
+ if (!serial) {
+ dbg("%s", "Serial Paranoia failed \n");
+ return;
+ }
+
+ mos7840_port = mos7840_get_port_private(port);
+
+ if (mos7840_port == NULL) {
+ return;
+ }
+
+ if (serial->dev) {
+
+ /* flush and block until tx is empty */
+ mos7840_block_until_chase_response(mos7840_port);
+ }
+
+ if (break_state == -1) {
+ data = mos7840_port->shadowLCR | LCR_SET_BREAK;
+ } else {
+ data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
+ }
+
+ mos7840_port->shadowLCR = data;
+ dbg("mcs7840_break mos7840_port->shadowLCR is %x\n",
+ mos7840_port->shadowLCR);
+ mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER,
+ mos7840_port->shadowLCR);
+
+ return;
+}
+
+/*****************************************************************************
+ * mos7840_write_room
+ * this function is called by the tty driver when it wants to know how many
+ * bytes of data we can accept for a specific port.
+ * If successful, we return the amount of room that we have for this port
+ * Otherwise we return a negative error number.
+ *****************************************************************************/
+
+static int mos7840_write_room(struct usb_serial_port *port)
+{
+ int i;
+ int room = 0;
+ struct moschip_port *mos7840_port;
+
+ dbg("%s \n", " mos7840_write_room:entering ...........");
+
+ if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
+ dbg("%s", "Invalid port \n");
+ dbg("%s \n", " mos7840_write_room:leaving ...........");
+ return -1;
+ }
+
+ mos7840_port = mos7840_get_port_private(port);
+ if (mos7840_port == NULL) {
+ dbg("%s \n", "mos7840_break:leaving ...........");
+ return -1;
+ }
+
+ for (i = 0; i < NUM_URBS; ++i) {
+ if (mos7840_port->write_urb_pool[i]->status != -EINPROGRESS) {
+ room += URB_TRANSFER_BUFFER_SIZE;
+ }
+ }
+
+ dbg("%s - returns %d", __FUNCTION__, room);
+ return (room);
+
+}
+
+/*****************************************************************************
+ * mos7840_write
+ * this function is called by the tty driver when data should be written to
+ * the port.
+ * If successful, we return the number of bytes written, otherwise we
+ * return a negative error number.
+ *****************************************************************************/
+
+static int mos7840_write(struct usb_serial_port *port,
+ const unsigned char *data, int count)
+{
+ int status;
+ int i;
+ int bytes_sent = 0;
+ int transfer_size;
+ int from_user = 0;
+
+ struct moschip_port *mos7840_port;
+ struct usb_serial *serial;
+ struct urb *urb;
+ //__u16 Data;
+ const unsigned char *current_position = data;
+ unsigned char *data1;
+ dbg("%s \n", "entering ...........");
+ //dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",mos7840_port->shadowLCR);
+
+#ifdef NOTMOS7840
+ Data = 0x00;
+ status = 0;
+ status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
+ mos7840_port->shadowLCR = Data;
+ dbg("mos7840_write: LINE_CONTROL_REGISTER is %x\n", Data);
+ dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
+ mos7840_port->shadowLCR);
+
+ //Data = 0x03;
+ //status = mos7840_set_uart_reg(port,LINE_CONTROL_REGISTER,Data);
+ //mos7840_port->shadowLCR=Data;//Need to add later
+
+ Data |= SERIAL_LCR_DLAB; //data latch enable in LCR 0x80
+ status = 0;
+ status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
+
+ //Data = 0x0c;
+ //status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data);
+ Data = 0x00;
+ status = 0;
+ status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
+ dbg("mos7840_write:DLL value is %x\n", Data);
+
+ Data = 0x0;
+ status = 0;
+ status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
+ dbg("mos7840_write:DLM value is %x\n", Data);
+
+ Data = Data & ~SERIAL_LCR_DLAB;
+ dbg("mos7840_write: mos7840_port->shadowLCR is %x\n",
+ mos7840_port->shadowLCR);
+ status = 0;
+ status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
+#endif
+
+ if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
+ dbg("%s", "Port Paranoia failed \n");
+ return -1;
+ }
+
+ serial = port->serial;
+ if (mos7840_serial_paranoia_check(serial, __FUNCTION__)) {
+ dbg("%s", "Serial Paranoia failed \n");
+ return -1;
+ }
+
+ mos7840_port = mos7840_get_port_private(port);
+ if (mos7840_port == NULL) {
+ dbg("%s", "mos7840_port is NULL\n");
+ return -1;
+ }
+
+ /* try to find a free urb in the list */
+ urb = NULL;
+
+ for (i = 0; i < NUM_URBS; ++i) {
+ if (mos7840_port->write_urb_pool[i]->status != -EINPROGRESS) {
+ urb = mos7840_port->write_urb_pool[i];
+ dbg("\nURB:%d", i);
+ break;
+ }
+ }
+
+ if (urb == NULL) {
+ dbg("%s - no more free urbs", __FUNCTION__);
+ goto exit;
+ }
+
+ if (urb->transfer_buffer == NULL) {
+ urb->transfer_buffer =
+ kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
+
+ if (urb->transfer_buffer == NULL) {
+ err("%s no more kernel memory...", __FUNCTION__);
+ goto exit;
+ }
+ }
+ transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
+
+ if (from_user) {
+ if (copy_from_user
+ (urb->transfer_buffer, current_position, transfer_size)) {
+ bytes_sent = -EFAULT;
+ goto exit;
+ }
+ } else {
+ memcpy(urb->transfer_buffer, current_position, transfer_size);
+ }
+
+ /* fill urb with data and submit */
+ usb_fill_bulk_urb(urb,
+ serial->dev,
+ usb_sndbulkpipe(serial->dev,
+ port->bulk_out_endpointAddress),
+ urb->transfer_buffer,
+ transfer_size,
+ mos7840_bulk_out_data_callback, mos7840_port);
+
+ data1 = urb->transfer_buffer;
+ dbg("\nbulkout endpoint is %d", port->bulk_out_endpointAddress);
+
+ /* send it down the pipe */
+ status = usb_submit_urb(urb, GFP_ATOMIC);
+
+ if (status) {
+ err("%s - usb_submit_urb(write bulk) failed with status = %d",
+ __FUNCTION__, status);
+ bytes_sent = status;
+ goto exit;
+ }
+ bytes_sent = transfer_size;
+ mos7840_port->icount.tx += transfer_size;
+ dbg("mos7840_port->icount.tx is %d:\n", mos7840_port->icount.tx);
+ exit:
+
+ return bytes_sent;
+
+}
+
+/*****************************************************************************
+ * mos7840_throttle
+ * this function is called by the tty driver when it wants to stop the data
+ * being read from the port.
+ *****************************************************************************/
+
+static void mos7840_throttle(struct usb_serial_port *port)
+{
+ struct moschip_port *mos7840_port;
+ struct tty_struct *tty;
+ int status;
+
+ if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
+ dbg("%s", "Invalid port \n");
+ return;
+ }
+
+ dbg("- port %d\n", port->number);
+
+ mos7840_port = mos7840_get_port_private(port);
+
+ if (mos7840_port == NULL)
+ return;
+
+ if (!mos7840_port->open) {
+ dbg("%s\n", "port not opened");
+ return;
+ }
+
+ dbg("%s", "Entering .......... \n");
+
+ tty = port->tty;
+ if (!tty) {
+ dbg("%s - no tty available", __FUNCTION__);
+ return;
+ }
+
+ /* if we are implementing XON/XOFF, send the stop character */
+ if (I_IXOFF(tty)) {
+ unsigned char stop_char = STOP_CHAR(tty);
+ status = mos7840_write(port, &stop_char, 1);
+ if (status <= 0) {
+ return;
+ }
+ }
+
+ /* if we are implementing RTS/CTS, toggle that line */
+ if (tty->termios->c_cflag & CRTSCTS) {
+ mos7840_port->shadowMCR &= ~MCR_RTS;
+ status = 0;
+ status =
+ mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
+ mos7840_port->shadowMCR);
+
+ if (status < 0) {
+ return;
+ }
+ }
+
+ return;
+}
+
+/*****************************************************************************
+ * mos7840_unthrottle
+ * this function is called by the tty driver when it wants to resume the data
+ * being read from the port (called after SerialThrottle is called)
+ *****************************************************************************/
+static void mos7840_unthrottle(struct usb_serial_port *port)
+{
+ struct tty_struct *tty;
+ int status;
+ struct moschip_port *mos7840_port = mos7840_get_port_private(port);
+
+ if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
+ dbg("%s", "Invalid port \n");
+ return;
+ }
+
+ if (mos7840_port == NULL)
+ return;
+
+ if (!mos7840_port->open) {
+ dbg("%s - port not opened", __FUNCTION__);
+ return;
+ }
+
+ dbg("%s", "Entering .......... \n");
+
+ tty = port->tty;
+ if (!tty) {
+ dbg("%s - no tty available", __FUNCTION__);
+ return;
+ }
+
+ /* if we are implementing XON/XOFF, send the start character */
+ if (I_IXOFF(tty)) {
+ unsigned char start_char = START_CHAR(tty);
+ status = mos7840_write(port, &start_char, 1);
+ if (status <= 0) {
+ return;
+ }
+ }
+
+ /* if we are implementing RTS/CTS, toggle that line */
+ if (tty->termios->c_cflag & CRTSCTS) {
+ mos7840_port->shadowMCR |= MCR_RTS;
+ status = 0;
+ status =
+ mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
+ mos7840_port->shadowMCR);
+ if (status < 0) {
+ return;
+ }
+ }
+
+ return;
+}
+
+static int mos7840_tiocmget(struct usb_serial_port *port, struct file *file)
+{
+ struct moschip_port *mos7840_port;
+ unsigned int result;
+ __u16 msr;
+ __u16 mcr;
+ int status = 0;
+ mos7840_port = mos7840_get_port_private(port);
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ if (mos7840_port == NULL)
+ return -ENODEV;
+
+ status = mos7840_get_uart_reg(port, MODEM_STATUS_REGISTER, &msr);
+ status = mos7840_get_uart_reg(port, MODEM_CONTROL_REGISTER, &mcr);
+ result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0)
+ | ((mcr & MCR_RTS) ? TIOCM_RTS : 0)
+ | ((mcr & MCR_LOOPBACK) ? TIOCM_LOOP : 0)
+ | ((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0)
+ | ((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0)
+ | ((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0)
+ | ((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0);
+
+ dbg("%s - 0x%04X", __FUNCTION__, result);
+
+ return result;
+}
+
+static int mos7840_tiocmset(struct usb_serial_port *port, struct file *file,
+ unsigned int set, unsigned int clear)
+{
+ struct moschip_port *mos7840_port;
+ unsigned int mcr;
+ unsigned int status;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ mos7840_port = mos7840_get_port_private(port);
+
+ if (mos7840_port == NULL)
+ return -ENODEV;
+
+ mcr = mos7840_port->shadowMCR;
+ if (clear & TIOCM_RTS)
+ mcr &= ~MCR_RTS;
+ if (clear & TIOCM_DTR)
+ mcr &= ~MCR_DTR;
+ if (clear & TIOCM_LOOP)
+ mcr &= ~MCR_LOOPBACK;
+
+ if (set & TIOCM_RTS)
+ mcr |= MCR_RTS;
+ if (set & TIOCM_DTR)
+ mcr |= MCR_DTR;
+ if (set & TIOCM_LOOP)
+ mcr |= MCR_LOOPBACK;
+
+ mos7840_port->shadowMCR = mcr;
+
+ status = 0;
+ status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
+ if (status < 0) {
+ dbg("setting MODEM_CONTROL_REGISTER Failed\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+/*****************************************************************************
+ * mos7840_calc_baud_rate_divisor
+ * this function calculates the proper baud rate divisor for the specified
+ * baud rate.
+ *****************************************************************************/
+static int mos7840_calc_baud_rate_divisor(int baudRate, int *divisor,
+ __u16 * clk_sel_val)
+{
+
+ dbg("%s - %d", __FUNCTION__, baudRate);
+
+ if (baudRate <= 115200) {
+ *divisor = 115200 / baudRate;
+ *clk_sel_val = 0x0;
+ }
+ if ((baudRate > 115200) && (baudRate <= 230400)) {
+ *divisor = 230400 / baudRate;
+ *clk_sel_val = 0x10;
+ } else if ((baudRate > 230400) && (baudRate <= 403200)) {
+ *divisor = 403200 / baudRate;
+ *clk_sel_val = 0x20;
+ } else if ((baudRate > 403200) && (baudRate <= 460800)) {
+ *divisor = 460800 / baudRate;
+ *clk_sel_val = 0x30;
+ } else if ((baudRate > 460800) && (baudRate <= 806400)) {
+ *divisor = 806400 / baudRate;
+ *clk_sel_val = 0x40;
+ } else if ((baudRate > 806400) && (baudRate <= 921600)) {
+ *divisor = 921600 / baudRate;
+ *clk_sel_val = 0x50;
+ } else if ((baudRate > 921600) && (baudRate <= 1572864)) {
+ *divisor = 1572864 / baudRate;
+ *clk_sel_val = 0x60;
+ } else if ((baudRate > 1572864) && (baudRate <= 3145728)) {
+ *divisor = 3145728 / baudRate;
+ *clk_sel_val = 0x70;
+ }
+ return 0;
+
+#ifdef NOTMCS7840
+
+ for (i = 0; i < ARRAY_SIZE(mos7840_divisor_table); i++) {
+ if (mos7840_divisor_table[i].BaudRate == baudrate) {
+ *divisor = mos7840_divisor_table[i].Divisor;
+ return 0;
+ }
+ }
+
+ /* After trying for all the standard baud rates *
+ * Try calculating the divisor for this baud rate */
+
+ if (baudrate > 75 && baudrate < 230400) {
+ /* get the divisor */
+ custom = (__u16) (230400L / baudrate);
+
+ /* Check for round off */
+ round1 = (__u16) (2304000L / baudrate);
+ round = (__u16) (round1 - (custom * 10));
+ if (round > 4) {
+ custom++;
+ }
+ *divisor = custom;
+
+ dbg(" Baud %d = %d\n", baudrate, custom);
+ return 0;
+ }
+
+ dbg("%s\n", " Baud calculation Failed...");
+ return -1;
+#endif
+}
+
+/*****************************************************************************
+ * mos7840_send_cmd_write_baud_rate
+ * this function sends the proper command to change the baud rate of the
+ * specified port.
+ *****************************************************************************/
+
+static int mos7840_send_cmd_write_baud_rate(struct moschip_port *mos7840_port,
+ int baudRate)
+{
+ int divisor = 0;
+ int status;
+ __u16 Data;
+ unsigned char number;
+ __u16 clk_sel_val;
+ struct usb_serial_port *port;
+
+ if (mos7840_port == NULL)
+ return -1;
+
+ port = (struct usb_serial_port *)mos7840_port->port;
+ if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
+ dbg("%s", "Invalid port \n");
+ return -1;
+ }
+
+ if (mos7840_serial_paranoia_check(port->serial, __FUNCTION__)) {
+ dbg("%s", "Invalid Serial \n");
+ return -1;
+ }
+
+ dbg("%s", "Entering .......... \n");
+
+ number = mos7840_port->port->number - mos7840_port->port->serial->minor;
+
+ dbg("%s - port = %d, baud = %d", __FUNCTION__,
+ mos7840_port->port->number, baudRate);
+ //reset clk_uart_sel in spregOffset
+ if (baudRate > 115200) {
+#ifdef HW_flow_control
+ //NOTE: need to see the pther register to modify
+ //setting h/w flow control bit to 1;
+ status = 0;
+ Data = 0x2b;
+ mos7840_port->shadowMCR = Data;
+ status =
+ mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
+ if (status < 0) {
+ dbg("Writing spreg failed in set_serial_baud\n");
+ return -1;
+ }
+#endif
+
+ } else {
+#ifdef HW_flow_control
+ //setting h/w flow control bit to 0;
+ status = 0;
+ Data = 0xb;
+ mos7840_port->shadowMCR = Data;
+ status =
+ mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
+ if (status < 0) {
+ dbg("Writing spreg failed in set_serial_baud\n");
+ return -1;
+ }
+#endif
+
+ }
+
+ if (1) //baudRate <= 115200)
+ {
+ clk_sel_val = 0x0;
+ Data = 0x0;
+ status = 0;
+ status =
+ mos7840_calc_baud_rate_divisor(baudRate, &divisor,
+ &clk_sel_val);
+ status =
+ mos7840_get_reg_sync(port, mos7840_port->SpRegOffset,
+ &Data);
+ if (status < 0) {
+ dbg("reading spreg failed in set_serial_baud\n");
+ return -1;
+ }
+ Data = (Data & 0x8f) | clk_sel_val;
+ status = 0;
+ status =
+ mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
+ if (status < 0) {
+ dbg("Writing spreg failed in set_serial_baud\n");
+ return -1;
+ }
+ /* Calculate the Divisor */
+
+ if (status) {
+ err("%s - bad baud rate", __FUNCTION__);
+ dbg("%s\n", "bad baud rate");
+ return status;
+ }
+ /* Enable access to divisor latch */
+ Data = mos7840_port->shadowLCR | SERIAL_LCR_DLAB;
+ mos7840_port->shadowLCR = Data;
+ mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
+
+ /* Write the divisor */
+ Data = (unsigned char)(divisor & 0xff);
+ dbg("set_serial_baud Value to write DLL is %x\n", Data);
+ mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
+
+ Data = (unsigned char)((divisor & 0xff00) >> 8);
+ dbg("set_serial_baud Value to write DLM is %x\n", Data);
+ mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
+
+ /* Disable access to divisor latch */
+ Data = mos7840_port->shadowLCR & ~SERIAL_LCR_DLAB;
+ mos7840_port->shadowLCR = Data;
+ mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
+
+ }
+
+ return status;
+}
+
+/*****************************************************************************
+ * mos7840_change_port_settings
+ * This routine is called to set the UART on the device to match
+ * the specified new settings.
+ *****************************************************************************/
+
+static void mos7840_change_port_settings(struct moschip_port *mos7840_port,
+ struct termios *old_termios)
+{
+ struct tty_struct *tty;
+ int baud;
+ unsigned cflag;
+ unsigned iflag;
+ __u8 lData;
+ __u8 lParity;
+ __u8 lStop;
+ int status;
+ __u16 Data;
+ struct usb_serial_port *port;
+ struct usb_serial *serial;
+
+ if (mos7840_port == NULL)
+ return;
+
+ port = (struct usb_serial_port *)mos7840_port->port;
+
+ if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
+ dbg("%s", "Invalid port \n");
+ return;
+ }
+
+ if (mos7840_serial_paranoia_check(port->serial, __FUNCTION__)) {
+ dbg("%s", "Invalid Serial \n");
+ return;
+ }
+
+ serial = port->serial;
+
+ dbg("%s - port %d", __FUNCTION__, mos7840_port->port->number);
+
+ if (!mos7840_port->open) {
+ dbg("%s - port not opened", __FUNCTION__);
+ return;
+ }
+
+ tty = mos7840_port->port->tty;
+
+ if ((!tty) || (!tty->termios)) {
+ dbg("%s - no tty structures", __FUNCTION__);
+ return;
+ }
+
+ dbg("%s", "Entering .......... \n");
+
+ lData = LCR_BITS_8;
+ lStop = LCR_STOP_1;
+ lParity = LCR_PAR_NONE;
+
+ cflag = tty->termios->c_cflag;
+ iflag = tty->termios->c_iflag;
+
+ /* Change the number of bits */
+ if (cflag & CSIZE) {
+ switch (cflag & CSIZE) {
+ case CS5:
+ lData = LCR_BITS_5;
+ break;
+
+ case CS6:
+ lData = LCR_BITS_6;
+ break;
+
+ case CS7:
+ lData = LCR_BITS_7;
+ break;
+ default:
+ case CS8:
+ lData = LCR_BITS_8;
+ break;
+ }
+ }
+ /* Change the Parity bit */
+ if (cflag & PARENB) {
+ if (cflag & PARODD) {
+ lParity = LCR_PAR_ODD;
+ dbg("%s - parity = odd", __FUNCTION__);
+ } else {
+ lParity = LCR_PAR_EVEN;
+ dbg("%s - parity = even", __FUNCTION__);
+ }
+
+ } else {
+ dbg("%s - parity = none", __FUNCTION__);
+ }
+
+ if (cflag & CMSPAR) {
+ lParity = lParity | 0x20;
+ }
+
+ /* Change the Stop bit */
+ if (cflag & CSTOPB) {
+ lStop = LCR_STOP_2;
+ dbg("%s - stop bits = 2", __FUNCTION__);
+ } else {
+ lStop = LCR_STOP_1;
+ dbg("%s - stop bits = 1", __FUNCTION__);
+ }
+
+ /* Update the LCR with the correct value */
+ mos7840_port->shadowLCR &=
+ ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
+ mos7840_port->shadowLCR |= (lData | lParity | lStop);
+
+ dbg("mos7840_change_port_settings mos7840_port->shadowLCR is %x\n",
+ mos7840_port->shadowLCR);
+ /* Disable Interrupts */
+ Data = 0x00;
+ mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
+
+ Data = 0x00;
+ mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
+
+ Data = 0xcf;
+ mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
+
+ /* Send the updated LCR value to the mos7840 */
+ Data = mos7840_port->shadowLCR;
+
+ mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
+
+ Data = 0x00b;
+ mos7840_port->shadowMCR = Data;
+ mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
+ Data = 0x00b;
+ mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
+
+ /* set up the MCR register and send it to the mos7840 */
+
+ mos7840_port->shadowMCR = MCR_MASTER_IE;
+ if (cflag & CBAUD) {
+ mos7840_port->shadowMCR |= (MCR_DTR | MCR_RTS);
+ }
+
+ if (cflag & CRTSCTS) {
+ mos7840_port->shadowMCR |= (MCR_XON_ANY);
+
+ } else {
+ mos7840_port->shadowMCR &= ~(MCR_XON_ANY);
+ }
+
+ Data = mos7840_port->shadowMCR;
+ mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
+
+ /* Determine divisor based on baud rate */
+ baud = tty_get_baud_rate(tty);
+
+ if (!baud) {
+ /* pick a default, any default... */
+ dbg("%s\n", "Picked default baud...");
+ baud = 9600;
+ }
+
+ dbg("%s - baud rate = %d", __FUNCTION__, baud);
+ status = mos7840_send_cmd_write_baud_rate(mos7840_port, baud);
+
+ /* Enable Interrupts */
+ Data = 0x0c;
+ mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
+
+ if (mos7840_port->read_urb->status != -EINPROGRESS) {
+ mos7840_port->read_urb->dev = serial->dev;
+
+ status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
+
+ if (status) {
+ dbg(" usb_submit_urb(read bulk) failed, status = %d",
+ status);
+ }
+ }
+ wake_up(&mos7840_port->delta_msr_wait);
+ mos7840_port->delta_msr_cond = 1;
+ dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x\n",
+ mos7840_port->shadowLCR);
+
+ return;
+}
+
+/*****************************************************************************
+ * mos7840_set_termios
+ * this function is called by the tty driver when it wants to change
+ * the termios structure
+ *****************************************************************************/
+
+static void mos7840_set_termios(struct usb_serial_port *port,
+ struct termios *old_termios)
+{
+ int status;
+ unsigned int cflag;
+ struct usb_serial *serial;
+ struct moschip_port *mos7840_port;
+ struct tty_struct *tty;
+ dbg("mos7840_set_termios: START\n");
+ if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
+ dbg("%s", "Invalid port \n");
+ return;
+ }
+
+ serial = port->serial;
+
+ if (mos7840_serial_paranoia_check(serial, __FUNCTION__)) {
+ dbg("%s", "Invalid Serial \n");
+ return;
+ }
+
+ mos7840_port = mos7840_get_port_private(port);
+
+ if (mos7840_port == NULL)
+ return;
+
+ tty = port->tty;
+
+ if (!port->tty || !port->tty->termios) {
+ dbg("%s - no tty or termios", __FUNCTION__);
+ return;
+ }
+
+ if (!mos7840_port->open) {
+ dbg("%s - port not opened", __FUNCTION__);
+ return;
+ }
+
+ dbg("%s\n", "setting termios - ");
+
+ cflag = tty->termios->c_cflag;
+
+ if (!cflag) {
+ dbg("%s %s\n", __FUNCTION__, "cflag is NULL");
+ return;
+ }
+
+ /* check that they really want us to change something */
+ if (old_termios) {
+ if ((cflag == old_termios->c_cflag) &&
+ (RELEVANT_IFLAG(tty->termios->c_iflag) ==
+ RELEVANT_IFLAG(old_termios->c_iflag))) {
+ dbg("%s\n", "Nothing to change");
+ return;
+ }
+ }
+
+ dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
+ tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
+
+ if (old_termios) {
+ dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
+ old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
+ }
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ /* change the port settings to the new ones specified */
+
+ mos7840_change_port_settings(mos7840_port, old_termios);
+
+ if (!mos7840_port->read_urb) {
+ dbg("%s", "URB KILLED !!!!!\n");
+ return;
+ }
+
+ if (mos7840_port->read_urb->status != -EINPROGRESS) {
+ mos7840_port->read_urb->dev = serial->dev;
+ status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
+ if (status) {
+ dbg(" usb_submit_urb(read bulk) failed, status = %d",
+ status);
+ }
+ }
+ return;
+}
+
+/*****************************************************************************
+ * mos7840_get_lsr_info - get line status register info
+ *
+ * Purpose: Let user call ioctl() to get info when the UART physically
+ * is emptied. On bus types like RS485, the transmitter must
+ * release the bus after transmitting. This must be done when
+ * the transmit shift register is empty, not be done when the
+ * transmit holding register is empty. This functionality
+ * allows an RS485 driver to be written in user space.
+ *****************************************************************************/
+
+static int mos7840_get_lsr_info(struct moschip_port *mos7840_port,
+ unsigned int *value)
+{
+ int count;
+ unsigned int result = 0;
+
+ count = mos7840_chars_in_buffer(mos7840_port->port);
+ if (count == 0) {
+ dbg("%s -- Empty", __FUNCTION__);
+ result = TIOCSER_TEMT;
+ }
+
+ if (copy_to_user(value, &result, sizeof(int)))
+ return -EFAULT;
+ return 0;
+}
+
+/*****************************************************************************
+ * mos7840_get_bytes_avail - get number of bytes available
+ *
+ * Purpose: Let user call ioctl to get the count of number of bytes available.
+ *****************************************************************************/
+
+static int mos7840_get_bytes_avail(struct moschip_port *mos7840_port,
+ unsigned int *value)
+{
+ unsigned int result = 0;
+ struct tty_struct *tty = mos7840_port->port->tty;
+
+ if (!tty)
+ return -ENOIOCTLCMD;
+
+ result = tty->read_cnt;
+
+ dbg("%s(%d) = %d", __FUNCTION__, mos7840_port->port->number, result);
+ if (copy_to_user(value, &result, sizeof(int)))
+ return -EFAULT;
+
+ return -ENOIOCTLCMD;
+}
+
+/*****************************************************************************
+ * mos7840_set_modem_info
+ * function to set modem info
+ *****************************************************************************/
+
+static int mos7840_set_modem_info(struct moschip_port *mos7840_port,
+ unsigned int cmd, unsigned int *value)
+{
+ unsigned int mcr;
+ unsigned int arg;
+ __u16 Data;
+ int status;
+ struct usb_serial_port *port;
+
+ if (mos7840_port == NULL)
+ return -1;
+
+ port = (struct usb_serial_port *)mos7840_port->port;
+ if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
+ dbg("%s", "Invalid port \n");
+ return -1;
+ }
+
+ mcr = mos7840_port->shadowMCR;
+
+ if (copy_from_user(&arg, value, sizeof(int)))
+ return -EFAULT;
+
+ switch (cmd) {
+ case TIOCMBIS:
+ if (arg & TIOCM_RTS)
+ mcr |= MCR_RTS;
+ if (arg & TIOCM_DTR)
+ mcr |= MCR_RTS;
+ if (arg & TIOCM_LOOP)
+ mcr |= MCR_LOOPBACK;
+ break;
+
+ case TIOCMBIC:
+ if (arg & TIOCM_RTS)
+ mcr &= ~MCR_RTS;
+ if (arg & TIOCM_DTR)
+ mcr &= ~MCR_RTS;
+ if (arg & TIOCM_LOOP)
+ mcr &= ~MCR_LOOPBACK;
+ break;
+
+ case TIOCMSET:
+ /* turn off the RTS and DTR and LOOPBACK
+ * and then only turn on what was asked to */
+ mcr &= ~(MCR_RTS | MCR_DTR | MCR_LOOPBACK);
+ mcr |= ((arg & TIOCM_RTS) ? MCR_RTS : 0);
+ mcr |= ((arg & TIOCM_DTR) ? MCR_DTR : 0);
+ mcr |= ((arg & TIOCM_LOOP) ? MCR_LOOPBACK : 0);
+ break;
+ }
+
+ mos7840_port->shadowMCR = mcr;
+
+ Data = mos7840_port->shadowMCR;
+ status = 0;
+ status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
+ if (status < 0) {
+ dbg("setting MODEM_CONTROL_REGISTER Failed\n");
+ return -1;
+ }
+
+ return 0;
+}
+
+/*****************************************************************************
+ * mos7840_get_modem_info
+ * function to get modem info
+ *****************************************************************************/
+
+static int mos7840_get_modem_info(struct moschip_port *mos7840_port,
+ unsigned int *value)
+{
+ unsigned int result = 0;
+ __u16 msr;
+ unsigned int mcr = mos7840_port->shadowMCR;
+ int status = 0;
+ status =
+ mos7840_get_uart_reg(mos7840_port->port, MODEM_STATUS_REGISTER,
+ &msr);
+ result = ((mcr & MCR_DTR) ? TIOCM_DTR : 0) /* 0x002 */
+ |((mcr & MCR_RTS) ? TIOCM_RTS : 0) /* 0x004 */
+ |((msr & MOS7840_MSR_CTS) ? TIOCM_CTS : 0) /* 0x020 */
+ |((msr & MOS7840_MSR_CD) ? TIOCM_CAR : 0) /* 0x040 */
+ |((msr & MOS7840_MSR_RI) ? TIOCM_RI : 0) /* 0x080 */
+ |((msr & MOS7840_MSR_DSR) ? TIOCM_DSR : 0); /* 0x100 */
+
+ dbg("%s -- %x", __FUNCTION__, result);
+
+ if (copy_to_user(value, &result, sizeof(int)))
+ return -EFAULT;
+ return 0;
+}
+
+/*****************************************************************************
+ * mos7840_get_serial_info
+ * function to get information about serial port
+ *****************************************************************************/
+
+static int mos7840_get_serial_info(struct moschip_port *mos7840_port,
+ struct serial_struct *retinfo)
+{
+ struct serial_struct tmp;
+
+ if (mos7840_port == NULL)
+ return -1;
+
+ if (!retinfo)
+ return -EFAULT;
+
+ memset(&tmp, 0, sizeof(tmp));
+
+ tmp.type = PORT_16550A;
+ tmp.line = mos7840_port->port->serial->minor;
+ tmp.port = mos7840_port->port->number;
+ tmp.irq = 0;
+ tmp.flags = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
+ tmp.xmit_fifo_size = NUM_URBS * URB_TRANSFER_BUFFER_SIZE;
+ tmp.baud_base = 9600;
+ tmp.close_delay = 5 * HZ;
+ tmp.closing_wait = 30 * HZ;
+
+ if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
+ return -EFAULT;
+ return 0;
+}
+
+/*****************************************************************************
+ * SerialIoctl
+ * this function handles any ioctl calls to the driver
+ *****************************************************************************/
+
+static int mos7840_ioctl(struct usb_serial_port *port, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct moschip_port *mos7840_port;
+ struct tty_struct *tty;
+
+ struct async_icount cnow;
+ struct async_icount cprev;
+ struct serial_icounter_struct icount;
+ int mosret = 0;
+ int retval;
+ struct tty_ldisc *ld;
+
+ if (mos7840_port_paranoia_check(port, __FUNCTION__)) {
+ dbg("%s", "Invalid port \n");
+ return -1;
+ }
+
+ mos7840_port = mos7840_get_port_private(port);
+ tty = mos7840_port->port->tty;
+
+ if (mos7840_port == NULL)
+ return -1;
+
+ dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
+
+ switch (cmd) {
+ /* return number of bytes available */
+
+ case TIOCINQ:
+ dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number);
+ return mos7840_get_bytes_avail(mos7840_port,
+ (unsigned int *)arg);
+ break;
+
+ case TIOCOUTQ:
+ dbg("%s (%d) TIOCOUTQ", __FUNCTION__, port->number);
+ return put_user(tty->driver->chars_in_buffer ?
+ tty->driver->chars_in_buffer(tty) : 0,
+ (int __user *)arg);
+ break;
+
+ case TCFLSH:
+ retval = tty_check_change(tty);
+ if (retval)
+ return retval;
+
+ ld = tty_ldisc_ref(tty);
+ switch (arg) {
+ case TCIFLUSH:
+ if (ld && ld->flush_buffer)
+ ld->flush_buffer(tty);
+ break;
+ case TCIOFLUSH:
+ if (ld && ld->flush_buffer)
+ ld->flush_buffer(tty);
+ /* fall through */
+ case TCOFLUSH:
+ if (tty->driver->flush_buffer)
+ tty->driver->flush_buffer(tty);
+ break;
+ default:
+ tty_ldisc_deref(ld);
+ return -EINVAL;
+ }
+ tty_ldisc_deref(ld);
+ return 0;
+
+ case TCGETS:
+ if (kernel_termios_to_user_termios
+ ((struct termios __user *)arg, tty->termios))
+ return -EFAULT;
+ return 0;
+
+ case TIOCSERGETLSR:
+ dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number);
+ return mos7840_get_lsr_info(mos7840_port, (unsigned int *)arg);
+ return 0;
+
+ case TIOCMBIS:
+ case TIOCMBIC:
+ case TIOCMSET:
+ dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__,
+ port->number);
+ mosret =
+ mos7840_set_modem_info(mos7840_port, cmd,
+ (unsigned int *)arg);
+ return mosret;
+
+ case TIOCMGET:
+ dbg("%s (%d) TIOCMGET", __FUNCTION__, port->number);
+ return mos7840_get_modem_info(mos7840_port,
+ (unsigned int *)arg);
+
+ case TIOCGSERIAL:
+ dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number);
+ return mos7840_get_serial_info(mos7840_port,
+ (struct serial_struct *)arg);
+
+ case TIOCSSERIAL:
+ dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number);
+ break;
+
+ case TIOCMIWAIT:
+ dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
+ cprev = mos7840_port->icount;
+ while (1) {
+ //interruptible_sleep_on(&mos7840_port->delta_msr_wait);
+ mos7840_port->delta_msr_cond = 0;
+ wait_event_interruptible(mos7840_port->delta_msr_wait,
+ (mos7840_port->
+ delta_msr_cond == 1));
+
+ /* see if a signal did it */
+ if (signal_pending(current))
+ return -ERESTARTSYS;
+ cnow = mos7840_port->icount;
+ if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
+ cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
+ return -EIO; /* no change => error */
+ if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
+ ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
+ ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
+ ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
+ return 0;
+ }
+ cprev = cnow;
+ }
+ /* NOTREACHED */
+ break;
+
+ case TIOCGICOUNT:
+ cnow = mos7840_port->icount;
+ icount.cts = cnow.cts;
+ icount.dsr = cnow.dsr;
+ icount.rng = cnow.rng;
+ icount.dcd = cnow.dcd;
+ icount.rx = cnow.rx;
+ icount.tx = cnow.tx;
+ icount.frame = cnow.frame;
+ icount.overrun = cnow.overrun;
+ icount.parity = cnow.parity;
+ icount.brk = cnow.brk;
+ icount.buf_overrun = cnow.buf_overrun;
+
+ dbg("%s (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__,
+ port->number, icount.rx, icount.tx);
+ if (copy_to_user((void *)arg, &icount, sizeof(icount)))
+ return -EFAULT;
+ return 0;
+
+ case TIOCEXBAUD:
+ return 0;
+ default:
+ break;
+ }
+
+ return -ENOIOCTLCMD;
+}
+
+static int mos7840_calc_num_ports(struct usb_serial *serial)
+{
+
+ dbg("numberofendpoints: %d \n",
+ (int)serial->interface->cur_altsetting->desc.bNumEndpoints);
+ dbg("numberofendpoints: %d \n",
+ (int)serial->interface->altsetting->desc.bNumEndpoints);
+ if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) {
+ mos7840_num_ports = 2;
+ serial->type->num_ports = 2;
+ } else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) {
+ mos7840_num_ports = 4;
+ serial->type->num_bulk_in = 4;
+ serial->type->num_bulk_out = 4;
+ serial->type->num_ports = 4;
+ }
+
+ return mos7840_num_ports;
+}
+
+/****************************************************************************
+ * mos7840_startup
+ ****************************************************************************/
+
+static int mos7840_startup(struct usb_serial *serial)
+{
+ struct moschip_port *mos7840_port;
+ struct usb_device *dev;
+ int i, status;
+
+ __u16 Data;
+ dbg("%s \n", " mos7840_startup :entering..........");
+
+ if (!serial) {
+ dbg("%s\n", "Invalid Handler");
+ return -1;
+ }
+
+ dev = serial->dev;
+
+ dbg("%s\n", "Entering...");
+
+ /* we set up the pointers to the endpoints in the mos7840_open *
+ * function, as the structures aren't created yet. */
+
+ /* set up port private structures */
+ for (i = 0; i < serial->num_ports; ++i) {
+ mos7840_port = kmalloc(sizeof(struct moschip_port), GFP_KERNEL);
+ if (mos7840_port == NULL) {
+ err("%s - Out of memory", __FUNCTION__);
+ return -ENOMEM;
+ }
+ memset(mos7840_port, 0, sizeof(struct moschip_port));
+
+ /* Initialize all port interrupt end point to port 0 int endpoint *
+ * Our device has only one interrupt end point comman to all port */
+
+ mos7840_port->port = serial->port[i];
+ mos7840_set_port_private(serial->port[i], mos7840_port);
+
+ mos7840_port->port_num = ((serial->port[i]->number -
+ (serial->port[i]->serial->minor)) +
+ 1);
+
+ if (mos7840_port->port_num == 1) {
+ mos7840_port->SpRegOffset = 0x0;
+ mos7840_port->ControlRegOffset = 0x1;
+ mos7840_port->DcrRegOffset = 0x4;
+ } else if ((mos7840_port->port_num == 2)
+ && (mos7840_num_ports == 4)) {
+ mos7840_port->SpRegOffset = 0x8;
+ mos7840_port->ControlRegOffset = 0x9;
+ mos7840_port->DcrRegOffset = 0x16;
+ } else if ((mos7840_port->port_num == 2)
+ && (mos7840_num_ports == 2)) {
+ mos7840_port->SpRegOffset = 0xa;
+ mos7840_port->ControlRegOffset = 0xb;
+ mos7840_port->DcrRegOffset = 0x19;
+ } else if ((mos7840_port->port_num == 3)
+ && (mos7840_num_ports == 4)) {
+ mos7840_port->SpRegOffset = 0xa;
+ mos7840_port->ControlRegOffset = 0xb;
+ mos7840_port->DcrRegOffset = 0x19;
+ } else if ((mos7840_port->port_num == 4)
+ && (mos7840_num_ports == 4)) {
+ mos7840_port->SpRegOffset = 0xc;
+ mos7840_port->ControlRegOffset = 0xd;
+ mos7840_port->DcrRegOffset = 0x1c;
+ }
+ mos7840_dump_serial_port(mos7840_port);
+
+ mos7840_set_port_private(serial->port[i], mos7840_port);
+
+ //enable rx_disable bit in control register
+
+ status =
+ mos7840_get_reg_sync(serial->port[i],
+ mos7840_port->ControlRegOffset, &Data);
+ if (status < 0) {
+ dbg("Reading ControlReg failed status-0x%x\n", status);
+ break;
+ } else
+ dbg("ControlReg Reading success val is %x, status%d\n",
+ Data, status);
+ Data |= 0x08; //setting driver done bit
+ Data |= 0x04; //sp1_bit to have cts change reflect in modem status reg
+
+ //Data |= 0x20; //rx_disable bit
+ status = 0;
+ status =
+ mos7840_set_reg_sync(serial->port[i],
+ mos7840_port->ControlRegOffset, Data);
+ if (status < 0) {
+ dbg("Writing ControlReg failed(rx_disable) status-0x%x\n", status);
+ break;
+ } else
+ dbg("ControlReg Writing success(rx_disable) status%d\n",
+ status);
+
+ //Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2 and 0x24 in DCR3
+ Data = 0x01;
+ status = 0;
+ status =
+ mos7840_set_reg_sync(serial->port[i],
+ (__u16) (mos7840_port->DcrRegOffset +
+ 0), Data);
+ if (status < 0) {
+ dbg("Writing DCR0 failed status-0x%x\n", status);
+ break;
+ } else
+ dbg("DCR0 Writing success status%d\n", status);
+
+ Data = 0x05;
+ status = 0;
+ status =
+ mos7840_set_reg_sync(serial->port[i],
+ (__u16) (mos7840_port->DcrRegOffset +
+ 1), Data);
+ if (status < 0) {
+ dbg("Writing DCR1 failed status-0x%x\n", status);
+ break;
+ } else
+ dbg("DCR1 Writing success status%d\n", status);
+
+ Data = 0x24;
+ status = 0;
+ status =
+ mos7840_set_reg_sync(serial->port[i],
+ (__u16) (mos7840_port->DcrRegOffset +
+ 2), Data);
+ if (status < 0) {
+ dbg("Writing DCR2 failed status-0x%x\n", status);
+ break;
+ } else
+ dbg("DCR2 Writing success status%d\n", status);
+
+ // write values in clkstart0x0 and clkmulti 0x20
+ Data = 0x0;
+ status = 0;
+ status =
+ mos7840_set_reg_sync(serial->port[i],
+ CLK_START_VALUE_REGISTER, Data);
+ if (status < 0) {
+ dbg("Writing CLK_START_VALUE_REGISTER failed status-0x%x\n", status);
+ break;
+ } else
+ dbg("CLK_START_VALUE_REGISTER Writing success status%d\n", status);
+
+ Data = 0x20;
+ status = 0;
+ status =
+ mos7840_set_reg_sync(serial->port[i], CLK_MULTI_REGISTER,
+ Data);
+ if (status < 0) {
+ dbg("Writing CLK_MULTI_REGISTER failed status-0x%x\n",
+ status);
+ break;
+ } else
+ dbg("CLK_MULTI_REGISTER Writing success status%d\n",
+ status);
+
+ //write value 0x0 to scratchpad register
+ Data = 0x00;
+ status = 0;
+ status =
+ mos7840_set_uart_reg(serial->port[i], SCRATCH_PAD_REGISTER,
+ Data);
+ if (status < 0) {
+ dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x\n",
+ status);
+ break;
+ } else
+ dbg("SCRATCH_PAD_REGISTER Writing success status%d\n",
+ status);
+
+ //Zero Length flag register
+ if ((mos7840_port->port_num != 1)
+ && (mos7840_num_ports == 2)) {
+
+ Data = 0xff;
+ status = 0;
+ status = mos7840_set_reg_sync(serial->port[i],
+ (__u16) (ZLP_REG1 +
+ ((__u16)
+ mos7840_port->
+ port_num)),
+ Data);
+ dbg("ZLIP offset%x\n",
+ (__u16) (ZLP_REG1 +
+ ((__u16) mos7840_port->port_num)));
+ if (status < 0) {
+ dbg("Writing ZLP_REG%d failed status-0x%x\n",
+ i + 2, status);
+ break;
+ } else
+ dbg("ZLP_REG%d Writing success status%d\n",
+ i + 2, status);
+ } else {
+ Data = 0xff;
+ status = 0;
+ status = mos7840_set_reg_sync(serial->port[i],
+ (__u16) (ZLP_REG1 +
+ ((__u16)
+ mos7840_port->
+ port_num) -
+ 0x1), Data);
+ dbg("ZLIP offset%x\n",
+ (__u16) (ZLP_REG1 +
+ ((__u16) mos7840_port->port_num) - 0x1));
+ if (status < 0) {
+ dbg("Writing ZLP_REG%d failed status-0x%x\n",
+ i + 1, status);
+ break;
+ } else
+ dbg("ZLP_REG%d Writing success status%d\n",
+ i + 1, status);
+
+ }
+ mos7840_port->control_urb = usb_alloc_urb(0, SLAB_ATOMIC);
+ mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
+
+ }
+
+ //Zero Length flag enable
+ Data = 0x0f;
+ status = 0;
+ status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
+ if (status < 0) {
+ dbg("Writing ZLP_REG5 failed status-0x%x\n", status);
+ return -1;
+ } else
+ dbg("ZLP_REG5 Writing success status%d\n", status);
+
+ /* setting configuration feature to one */
+ usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ (__u8) 0x03, 0x00, 0x01, 0x00, 0x00, 0x00, 5 * HZ);
+ return 0;
+}
+
+/****************************************************************************
+ * mos7840_shutdown
+ * This function is called whenever the device is removed from the usb bus.
+ ****************************************************************************/
+
+static void mos7840_shutdown(struct usb_serial *serial)
+{
+ int i;
+ struct moschip_port *mos7840_port;
+ dbg("%s \n", " shutdown :entering..........");
+
+ if (!serial) {
+ dbg("%s", "Invalid Handler \n");
+ return;
+ }
+
+ /* check for the ports to be closed,close the ports and disconnect */
+
+ /* free private structure allocated for serial port *
+ * stop reads and writes on all ports */
+
+ for (i = 0; i < serial->num_ports; ++i) {
+ mos7840_port = mos7840_get_port_private(serial->port[i]);
+ kfree(mos7840_port->ctrl_buf);
+ usb_kill_urb(mos7840_port->control_urb);
+ kfree(mos7840_port);
+ mos7840_set_port_private(serial->port[i], NULL);
+ }
+
+ dbg("%s\n", "Thank u :: ");
+
+}
+
+static struct usb_serial_driver moschip7840_4port_device = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "mos7840",
+ },
+ .description = DRIVER_DESC,
+ .id_table = moschip_port_id_table,
+ .num_interrupt_in = 1, //NUM_DONT_CARE,//1,
+#ifdef check
+ .num_bulk_in = 4,
+ .num_bulk_out = 4,
+ .num_ports = 4,
+#endif
+ .open = mos7840_open,
+ .close = mos7840_close,
+ .write = mos7840_write,
+ .write_room = mos7840_write_room,
+ .chars_in_buffer = mos7840_chars_in_buffer,
+ .throttle = mos7840_throttle,
+ .unthrottle = mos7840_unthrottle,
+ .calc_num_ports = mos7840_calc_num_ports,
+#ifdef MCSSerialProbe
+ .probe = mos7840_serial_probe,
+#endif
+ .ioctl = mos7840_ioctl,
+ .set_termios = mos7840_set_termios,
+ .break_ctl = mos7840_break,
+ .tiocmget = mos7840_tiocmget,
+ .tiocmset = mos7840_tiocmset,
+ .attach = mos7840_startup,
+ .shutdown = mos7840_shutdown,
+ .read_bulk_callback = mos7840_bulk_in_callback,
+ .read_int_callback = mos7840_interrupt_callback,
+};
+
+static struct usb_driver io_driver = {
+ .name = "mos7840",
+ .probe = usb_serial_probe,
+ .disconnect = usb_serial_disconnect,
+ .id_table = moschip_id_table_combined,
+};
+
+/****************************************************************************
+ * moschip7840_init
+ * This is called by the module subsystem, or on startup to initialize us
+ ****************************************************************************/
+static int __init moschip7840_init(void)
+{
+ int retval;
+
+ dbg("%s \n", " mos7840_init :entering..........");
+
+ /* Register with the usb serial */
+ retval = usb_serial_register(&moschip7840_4port_device);
+
+ if (retval)
+ goto failed_port_device_register;
+
+ dbg("%s\n", "Entring...");
+ info(DRIVER_DESC " " DRIVER_VERSION);
+
+ /* Register with the usb */
+ retval = usb_register(&io_driver);
+
+ if (retval)
+ goto failed_usb_register;
+
+ if (retval == 0) {
+ dbg("%s\n", "Leaving...");
+ return 0;
+ }
+
+ failed_usb_register:
+ usb_serial_deregister(&moschip7840_4port_device);
+
+ failed_port_device_register:
+
+ return retval;
+}
+
+/****************************************************************************
+ * moschip7840_exit
+ * Called when the driver is about to be unloaded.
+ ****************************************************************************/
+static void __exit moschip7840_exit(void)
+{
+
+ dbg("%s \n", " mos7840_exit :entering..........");
+
+ usb_deregister(&io_driver);
+
+ usb_serial_deregister(&moschip7840_4port_device);
+
+ dbg("%s\n", "Entring...");
+}
+
+module_init(moschip7840_init);
+module_exit(moschip7840_exit);
+
+/* Module information */
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_LICENSE("GPL");
+
+module_param(debug, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Debug enabled or not");
projects / linux-2.6 / commitdiff