--- /dev/null
+/*
+ * mos7720.c
+ * Controls the Moschip 7720 usb to dual port serial convertor
+ *
+ * Copyright 2006 Moschip Semiconductor Tech. Ltd.
+ *
+ * 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, version 2 of the License.
+ *
+ * Developed by:
+ * VijayaKumar.G.N. <vijaykumar@aspirecom.net>
+ * AjayKumar <ajay@aspirecom.net>
+ * Gurudeva.N. <gurudev@aspirecom.net>
+ *
+ * Cleaned up from the original by:
+ * Greg Kroah-Hartman <gregkh@suse.de>
+ *
+ * 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/spinlock.h>
+#include <linux/serial.h>
+#include <linux/serial_reg.h>
+#include <linux/usb.h>
+#include <linux/usb/serial.h>
+#include <asm/uaccess.h>
+
+
+/*
+ * Version Information
+ */
+#define DRIVER_VERSION "1.0.0.4F"
+#define DRIVER_AUTHOR "Aspire Communications pvt Ltd."
+#define DRIVER_DESC "Moschip USB Serial Driver"
+
+/* default urb timeout */
+#define MOS_WDR_TIMEOUT (HZ * 5)
+
+#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
+
+/* Interrupt Rotinue Defines */
+#define SERIAL_IIR_RLS 0x06
+#define SERIAL_IIR_RDA 0x04
+#define SERIAL_IIR_CTI 0x0c
+#define SERIAL_IIR_THR 0x02
+#define SERIAL_IIR_MS 0x00
+
+#define NUM_URBS 16 /* URB Count */
+#define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
+
+/* This structure holds all of the local port information */
+struct moschip_port
+{
+ __u8 shadowLCR; /* last LCR value received */
+ __u8 shadowMCR; /* last MCR value received */
+ __u8 shadowMSR; /* last MSR value received */
+ char open;
+ struct async_icount icount;
+ struct usb_serial_port *port; /* loop back to the owner */
+ struct urb *write_urb_pool[NUM_URBS];
+};
+
+/* This structure holds all of the individual serial device information */
+struct moschip_serial
+{
+ int interrupt_started;
+};
+
+static int debug;
+
+#define USB_VENDOR_ID_MOSCHIP 0x9710
+#define MOSCHIP_DEVICE_ID_7720 0x7720
+#define MOSCHIP_DEVICE_ID_7715 0x7715
+
+static struct usb_device_id moschip_port_id_table [] = {
+ { USB_DEVICE(USB_VENDOR_ID_MOSCHIP,MOSCHIP_DEVICE_ID_7720) },
+ { } /* terminating entry */
+};
+MODULE_DEVICE_TABLE(usb, moschip_port_id_table);
+
+
+/*
+ * mos7720_interrupt_callback
+ * this is the callback function for when we have received data on the
+ * interrupt endpoint.
+ */
+static void mos7720_interrupt_callback(struct urb *urb)
+{
+ int result;
+ int length;
+ __u32 *data;
+ unsigned int status;
+ __u8 sp1;
+ __u8 sp2;
+ __u8 st;
+
+ 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;
+
+ /* Moschip get 4 bytes
+ * Byte 1 IIR Port 1 (port.number is 0)
+ * Byte 2 IIR Port 2 (port.number is 1)
+ * Byte 3 --------------
+ * Byte 4 FIFO status for both */
+ if (length && length > 4) {
+ dbg("Wrong data !!!");
+ return;
+ }
+
+ status = *data;
+
+ sp1 = (status & 0xff000000)>>24;
+ sp2 = (status & 0x00ff0000)>>16;
+ st = status & 0x000000ff;
+
+ if ((sp1 & 0x01) || (sp2 & 0x01)) {
+ /* No Interrupt Pending in both the ports */
+ dbg("No Interrupt !!!");
+ } else {
+ switch (sp1 & 0x0f) {
+ case SERIAL_IIR_RLS:
+ dbg("Serial Port 1: Receiver status error or address "
+ "bit detected in 9-bit mode\n");
+ break;
+ case SERIAL_IIR_CTI:
+ dbg("Serial Port 1: Receiver time out");
+ break;
+ case SERIAL_IIR_MS:
+ dbg("Serial Port 1: Modem status change");
+ break;
+ }
+
+ switch (sp2 & 0x0f) {
+ case SERIAL_IIR_RLS:
+ dbg("Serial Port 2: Receiver status error or address "
+ "bit detected in 9-bit mode");
+ break;
+ case SERIAL_IIR_CTI:
+ dbg("Serial Port 2: Receiver time out");
+ break;
+ case SERIAL_IIR_MS:
+ dbg("Serial Port 2: Modem status change");
+ break;
+ }
+ }
+
+exit:
+ result = usb_submit_urb(urb, GFP_ATOMIC);
+ if (result)
+ dev_err(&urb->dev->dev,
+ "%s - Error %d submitting control urb\n",
+ __FUNCTION__, result);
+ return;
+}
+
+/*
+ * mos7720_bulk_in_callback
+ * this is the callback function for when we have received data on the
+ * bulk in endpoint.
+ */
+static void mos7720_bulk_in_callback(struct urb *urb)
+{
+ int status;
+ unsigned char *data ;
+ struct usb_serial_port *port;
+ struct moschip_port *mos7720_port;
+ struct tty_struct *tty;
+
+ if (urb->status) {
+ dbg("nonzero read bulk status received: %d",urb->status);
+ return;
+ }
+
+ mos7720_port = urb->context;
+ if (!mos7720_port) {
+ dbg("%s","NULL mos7720_port pointer \n");
+ return ;
+ }
+
+ port = mos7720_port->port;
+
+ dbg("Entering...%s", __FUNCTION__);
+
+ data = urb->transfer_buffer;
+
+ tty = port->tty;
+ if (tty && urb->actual_length) {
+ tty_buffer_request_room(tty, urb->actual_length);
+ tty_insert_flip_string(tty, data, urb->actual_length);
+ tty_flip_buffer_push(tty);
+ }
+
+ if (!port->read_urb) {
+ dbg("URB KILLED !!!");
+ return;
+ }
+
+ if (port->read_urb->status != -EINPROGRESS) {
+ port->read_urb->dev = port->serial->dev;
+
+ status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
+ if (status)
+ dbg("usb_submit_urb(read bulk) failed, status = %d",
+ status);
+ }
+}
+
+/*
+ * mos7720_bulk_out_data_callback
+ * this is the callback function for when we have finished sending serial
+ * data on the bulk out endpoint.
+ */
+static void mos7720_bulk_out_data_callback(struct urb *urb)
+{
+ struct moschip_port *mos7720_port;
+ struct tty_struct *tty;
+
+ if (urb->status) {
+ dbg("nonzero write bulk status received:%d", urb->status);
+ return;
+ }
+
+ mos7720_port = urb->context;
+ if (!mos7720_port) {
+ dbg("NULL mos7720_port pointer");
+ return ;
+ }
+
+ dbg("Entering .........");
+
+ tty = mos7720_port->port->tty;
+
+ if (tty && mos7720_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);
+ }
+
+ /* schedule_work(&mos7720_port->port->work); */
+}
+
+/*
+ * send_mos_cmd
+ * this function will be used for sending command to device
+ */
+static int send_mos_cmd(struct usb_serial *serial, __u8 request, __u16 value,
+ __u16 index, void *data)
+{
+ int status;
+ unsigned int pipe;
+ u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
+ __u8 requesttype;
+ __u16 size = 0x0000;
+
+ if (value < MOS_MAX_PORT) {
+ if (product == MOSCHIP_DEVICE_ID_7715) {
+ value = value*0x100+0x100;
+ } else {
+ value = value*0x100+0x200;
+ }
+ } else {
+ value = 0x0000;
+ if ((product == MOSCHIP_DEVICE_ID_7715) &&
+ (index != 0x08)) {
+ dbg("serial->product== MOSCHIP_DEVICE_ID_7715");
+ //index = 0x01 ;
+ }
+ }
+
+ if (request == MOS_WRITE) {
+ request = (__u8)MOS_WRITE;
+ requesttype = (__u8)0x40;
+ value = value + (__u16)*((unsigned char *)data);
+ data = NULL;
+ pipe = usb_sndctrlpipe(serial->dev, 0);
+ } else {
+ request = (__u8)MOS_READ;
+ requesttype = (__u8)0xC0;
+ size = 0x01;
+ pipe = usb_rcvctrlpipe(serial->dev,0);
+ }
+
+ status = usb_control_msg(serial->dev, pipe, request, requesttype,
+ value, index, data, size, MOS_WDR_TIMEOUT);
+
+ if (status < 0)
+ dbg("Command Write failed Value %x index %x\n",value,index);
+
+ return status;
+}
+
+static int mos7720_open(struct usb_serial_port *port, struct file * filp)
+{
+ struct usb_serial *serial;
+ struct usb_serial_port *port0;
+ struct urb *urb;
+ struct moschip_serial *mos7720_serial;
+ struct moschip_port *mos7720_port;
+ int response;
+ int port_number;
+ char data;
+ int j;
+
+ serial = port->serial;
+
+ mos7720_port = usb_get_serial_port_data(port);
+ if (mos7720_port == NULL)
+ return -ENODEV;
+
+ port0 = serial->port[0];
+
+ mos7720_serial = usb_get_serial_data(serial);
+
+ if (mos7720_serial == NULL || port0 == 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);
+ mos7720_port->write_urb_pool[j] = urb;
+
+ if (urb == NULL) {
+ err("No more urbs???");
+ continue;
+ }
+
+ 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 MCS7720 -- Write Init values to corresponding Registers
+ *
+ * Register Index
+ * 1 : IER
+ * 2 : FCR
+ * 3 : LCR
+ * 4 : MCR
+ *
+ * 0x08 : SP1/2 Control Reg
+ */
+ port_number = port->number - port->serial->minor;
+ send_mos_cmd(port->serial, MOS_READ, port_number, UART_LSR, &data);
+ dbg("SS::%p LSR:%x\n",mos7720_port, data);
+
+ dbg("Check:Sending Command ..........");
+
+ data = 0x02;
+ send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x01, &data);
+ data = 0x02;
+ send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x02, &data);
+
+ data = 0x00;
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
+ data = 0x00;
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
+
+ data = 0xCF;
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
+ data = 0x03;
+ mos7720_port->shadowLCR = data;
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
+ data = 0x0b;
+ mos7720_port->shadowMCR = data;
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
+ data = 0x0b;
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
+
+ data = 0x00;
+ send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
+ data = 0x00;
+ send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
+
+/* data = 0x00;
+ send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, port_number + 1, &data);
+ data = 0x03;
+ send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data);
+ data = 0x00;
+ send_mos_cmd(port->serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1, &data);
+*/
+ data = 0x00;
+ send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
+
+ data = data | (port->number - port->serial->minor + 1);
+ send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
+
+ data = 0x83;
+ mos7720_port->shadowLCR = data;
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
+ data = 0x0c;
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data);
+ data = 0x00;
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
+ data = 0x03;
+ mos7720_port->shadowLCR = data;
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
+ data = 0x0c;
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
+ data = 0x0c;
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
+
+//Matrix
+
+ /* 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;
+
+ /* see if we've set up our endpoint info yet *
+ * (can't set it up in mos7720_startup as the *
+ * structures were not set up at that time.) */
+ if (!mos7720_serial->interrupt_started) {
+ dbg("Interrupt buffer NULL !!!");
+
+ /* not set up yet, so do it now */
+ mos7720_serial->interrupt_started = 1;
+
+ dbg("To Submit URB !!!");
+
+ /* set up our interrupt urb */
+ usb_fill_int_urb(port0->interrupt_in_urb, serial->dev,
+ usb_rcvintpipe(serial->dev,
+ port->interrupt_in_endpointAddress),
+ port0->interrupt_in_buffer,
+ port0->interrupt_in_urb->transfer_buffer_length,
+ mos7720_interrupt_callback, mos7720_port,
+ port0->interrupt_in_urb->interval);
+
+ /* start interrupt read for this mos7720 this interrupt *
+ * will continue as long as the mos7720 is connected */
+ dbg("Submit URB over !!!");
+ response = usb_submit_urb(port0->interrupt_in_urb, GFP_KERNEL);
+ if (response)
+ dev_err(&port->dev,
+ "%s - Error %d submitting control urb",
+ __FUNCTION__, response);
+ }
+
+ /* set up our bulk in urb */
+ usb_fill_bulk_urb(port->read_urb, serial->dev,
+ usb_rcvbulkpipe(serial->dev,
+ port->bulk_in_endpointAddress),
+ port->bulk_in_buffer,
+ port->read_urb->transfer_buffer_length,
+ mos7720_bulk_in_callback, mos7720_port);
+ response = usb_submit_urb(port->read_urb, GFP_KERNEL);
+ if (response)
+ dev_err(&port->dev,
+ "%s - Error %d submitting read urb", __FUNCTION__, response);
+
+ /* initialize our icount structure */
+ memset(&(mos7720_port->icount), 0x00, sizeof(mos7720_port->icount));
+
+ /* initialize our port settings */
+ mos7720_port->shadowMCR = UART_MCR_OUT2; /* Must set to enable ints! */
+
+ /* send a open port command */
+ mos7720_port->open = 1;
+
+ return 0;
+}
+
+/*
+ * mos7720_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 mos7720_chars_in_buffer(struct usb_serial_port *port)
+{
+ int i;
+ int chars = 0;
+ struct moschip_port *mos7720_port;
+
+ dbg("%s:entering ...........", __FUNCTION__);
+
+ mos7720_port = usb_get_serial_port_data(port);
+ if (mos7720_port == NULL) {
+ dbg("%s:leaving ...........", __FUNCTION__);
+ return -ENODEV;
+ }
+
+ for (i = 0; i < NUM_URBS; ++i) {
+ if (mos7720_port->write_urb_pool[i]->status == -EINPROGRESS)
+ chars += URB_TRANSFER_BUFFER_SIZE;
+ }
+ dbg("%s - returns %d", __FUNCTION__, chars);
+ return chars;
+}
+
+static void mos7720_close(struct usb_serial_port *port, struct file *filp)
+{
+ struct usb_serial *serial;
+ struct moschip_port *mos7720_port;
+ char data;
+ int j;
+
+ dbg("mos7720_close:entering...");
+
+ serial = port->serial;
+
+ mos7720_port = usb_get_serial_port_data(port);
+ if (mos7720_port == NULL)
+ return;
+
+ for (j = 0; j < NUM_URBS; ++j)
+ usb_kill_urb(mos7720_port->write_urb_pool[j]);
+
+ /* Freeing Write URBs */
+ for (j = 0; j < NUM_URBS; ++j) {
+ if (mos7720_port->write_urb_pool[j]) {
+ kfree(mos7720_port->write_urb_pool[j]->transfer_buffer);
+ usb_free_urb(mos7720_port->write_urb_pool[j]);
+ }
+ }
+
+ /* While closing port, shutdown all bulk read, write *
+ * and interrupt read if they exists */
+ if (serial->dev) {
+ dbg("Shutdown bulk write");
+ usb_kill_urb(port->write_urb);
+ dbg("Shutdown bulk read");
+ usb_kill_urb(port->read_urb);
+ }
+
+ data = 0x00;
+ send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor,
+ 0x04, &data);
+
+ data = 0x00;
+ send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor,
+ 0x01, &data);
+
+ mos7720_port->open = 0;
+
+ dbg("Leaving %s", __FUNCTION__);
+}
+
+static void mos7720_break(struct usb_serial_port *port, int break_state)
+{
+ unsigned char data;
+ struct usb_serial *serial;
+ struct moschip_port *mos7720_port;
+
+ dbg("Entering %s", __FUNCTION__);
+
+ serial = port->serial;
+
+ mos7720_port = usb_get_serial_port_data(port);
+ if (mos7720_port == NULL)
+ return;
+
+ if (break_state == -1)
+ data = mos7720_port->shadowLCR | UART_LCR_SBC;
+ else
+ data = mos7720_port->shadowLCR & ~UART_LCR_SBC;
+
+ mos7720_port->shadowLCR = data;
+ send_mos_cmd(serial, MOS_WRITE, port->number - port->serial->minor,
+ 0x03, &data);
+
+ return;
+}
+
+/*
+ * mos7720_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 mos7720_write_room(struct usb_serial_port *port)
+{
+ struct moschip_port *mos7720_port;
+ int room = 0;
+ int i;
+
+ dbg("%s:entering ...........", __FUNCTION__);
+
+ mos7720_port = usb_get_serial_port_data(port);
+ if (mos7720_port == NULL) {
+ dbg("%s:leaving ...........", __FUNCTION__);
+ return -ENODEV;
+ }
+
+ for (i = 0; i < NUM_URBS; ++i) {
+ if (mos7720_port->write_urb_pool[i]->status != -EINPROGRESS)
+ room += URB_TRANSFER_BUFFER_SIZE;
+ }
+
+ dbg("%s - returns %d", __FUNCTION__, room);
+ return room;
+}
+
+static int mos7720_write(struct usb_serial_port *port,
+ const unsigned char *data, int count)
+{
+ int status;
+ int i;
+ int bytes_sent = 0;
+ int transfer_size;
+
+ struct moschip_port *mos7720_port;
+ struct usb_serial *serial;
+ struct urb *urb;
+ const unsigned char *current_position = data;
+
+ dbg("%s:entering ...........", __FUNCTION__);
+
+ serial = port->serial;
+
+ mos7720_port = usb_get_serial_port_data(port);
+ if (mos7720_port == NULL) {
+ dbg("mos7720_port is NULL");
+ return -ENODEV;
+ }
+
+ /* try to find a free urb in the list */
+ urb = NULL;
+
+ for (i = 0; i < NUM_URBS; ++i) {
+ if (mos7720_port->write_urb_pool[i]->status != -EINPROGRESS) {
+ urb = mos7720_port->write_urb_pool[i];
+ dbg("URB:%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);
+
+ memcpy(urb->transfer_buffer, current_position, transfer_size);
+ usb_serial_debug_data(debug, &port->dev, __FUNCTION__, transfer_size,
+ urb->transfer_buffer);
+
+ /* 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,
+ mos7720_bulk_out_data_callback, mos7720_port);
+
+ /* 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;
+
+exit:
+ return bytes_sent;
+}
+
+static void mos7720_throttle(struct usb_serial_port *port)
+{
+ struct moschip_port *mos7720_port;
+ struct tty_struct *tty;
+ int status;
+
+ dbg("%s- port %d\n", __FUNCTION__, port->number);
+
+ mos7720_port = usb_get_serial_port_data(port);
+
+ if (mos7720_port == NULL)
+ return;
+
+ if (!mos7720_port->open) {
+ dbg("port not opened");
+ return;
+ }
+
+ dbg("%s: Entering ..........", __FUNCTION__);
+
+ 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 = mos7720_write(port, &stop_char, 1);
+ if (status <= 0)
+ return;
+ }
+
+ /* if we are implementing RTS/CTS, toggle that line */
+ if (tty->termios->c_cflag & CRTSCTS) {
+ mos7720_port->shadowMCR &= ~UART_MCR_RTS;
+ status = send_mos_cmd(port->serial, MOS_WRITE,
+ port->number - port->serial->minor,
+ UART_MCR, &mos7720_port->shadowMCR);
+ if (status != 0)
+ return;
+ }
+}
+
+static void mos7720_unthrottle(struct usb_serial_port *port)
+{
+ struct tty_struct *tty;
+ int status;
+ struct moschip_port *mos7720_port = usb_get_serial_port_data(port);
+
+ if (mos7720_port == NULL)
+ return;
+
+ if (!mos7720_port->open) {
+ dbg("%s - port not opened", __FUNCTION__);
+ return;
+ }
+
+ dbg("%s: Entering ..........", __FUNCTION__);
+
+ 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 = mos7720_write(port, &start_char, 1);
+ if (status <= 0)
+ return;
+ }
+
+ /* if we are implementing RTS/CTS, toggle that line */
+ if (tty->termios->c_cflag & CRTSCTS) {
+ mos7720_port->shadowMCR |= UART_MCR_RTS;
+ status = send_mos_cmd(port->serial, MOS_WRITE,
+ port->number - port->serial->minor,
+ UART_MCR, &mos7720_port->shadowMCR);
+ if (status != 0)
+ return;
+ }
+}
+
+static int set_higher_rates(struct moschip_port *mos7720_port,
+ unsigned int baud)
+{
+ unsigned char data;
+ struct usb_serial_port *port;
+ struct usb_serial *serial;
+ int port_number;
+
+ if (mos7720_port == NULL)
+ return -EINVAL;
+
+ port = mos7720_port->port;
+ serial = port->serial;
+
+ /***********************************************
+ * Init Sequence for higher rates
+ ***********************************************/
+ dbg("Sending Setting Commands ..........");
+ port_number = port->number - port->serial->minor;
+
+ data = 0x000;
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
+ data = 0x000;
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x02, &data);
+ data = 0x0CF;
+ send_mos_cmd(serial, MOS_WRITE, port->number, 0x02, &data);
+ data = 0x00b;
+ mos7720_port->shadowMCR = data;
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
+ data = 0x00b;
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
+
+ data = 0x000;
+ send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
+ data = 0x000;
+ send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
+
+
+ /***********************************************
+ * Set for higher rates *
+ ***********************************************/
+
+ data = baud * 0x10;
+ send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, port_number + 1,&data);
+
+ data = 0x003;
+ send_mos_cmd(serial, MOS_READ, MOS_MAX_PORT, 0x08, &data);
+ data = 0x003;
+ send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT, 0x08, &data);
+
+ data = 0x02b;
+ mos7720_port->shadowMCR = data;
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
+ data = 0x02b;
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
+
+ /***********************************************
+ * Set DLL/DLM
+ ***********************************************/
+
+ data = mos7720_port->shadowLCR | UART_LCR_DLAB;
+ mos7720_port->shadowLCR = data;
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
+
+ data = 0x001; /* DLL */
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x00, &data);
+ data = 0x000; /* DLM */
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x01, &data);
+
+ data = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
+ mos7720_port->shadowLCR = data;
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x03, &data);
+
+ return 0;
+}
+
+/* baud rate information */
+struct divisor_table_entry
+{
+ __u32 baudrate;
+ __u16 divisor;
+};
+
+/* Define table of divisors for moschip 7720 hardware *
+ * These assume a 3.6864MHz crystal, the standard /16, and *
+ * MCR.7 = 0. */
+static struct divisor_table_entry divisor_table[] = {
+ { 50, 2304},
+ { 110, 1047}, /* 2094.545455 => 230450 => .0217 % over */
+ { 134, 857}, /* 1713.011152 => 230398.5 => .00065% under */
+ { 150, 768},
+ { 300, 384},
+ { 600, 192},
+ { 1200, 96},
+ { 1800, 64},
+ { 2400, 48},
+ { 4800, 24},
+ { 7200, 16},
+ { 9600, 12},
+ { 19200, 6},
+ { 38400, 3},
+ { 57600, 2},
+ { 115200, 1},
+};
+
+/*****************************************************************************
+ * calc_baud_rate_divisor
+ * this function calculates the proper baud rate divisor for the specified
+ * baud rate.
+ *****************************************************************************/
+static int calc_baud_rate_divisor(int baudrate, int *divisor)
+{
+ int i;
+ __u16 custom;
+ __u16 round1;
+ __u16 round;
+
+
+ dbg("%s - %d", __FUNCTION__, baudrate);
+
+ for (i = 0; i < ARRAY_SIZE(divisor_table); i++) {
+ if (divisor_table[i].baudrate == baudrate) {
+ *divisor = 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",baudrate, custom);
+ return 0;
+ }
+
+ dbg("Baud calculation Failed...");
+ return -EINVAL;
+}
+
+/*
+ * send_cmd_write_baud_rate
+ * this function sends the proper command to change the baud rate of the
+ * specified port.
+ */
+static int send_cmd_write_baud_rate(struct moschip_port *mos7720_port,
+ int baudrate)
+{
+ struct usb_serial_port *port;
+ struct usb_serial *serial;
+ int divisor;
+ int status;
+ unsigned char data;
+ unsigned char number;
+
+ if (mos7720_port == NULL)
+ return -1;
+
+ port = mos7720_port->port;
+ serial = port->serial;
+
+ dbg("%s: Entering ..........", __FUNCTION__);
+
+ number = port->number - port->serial->minor;
+ dbg("%s - port = %d, baud = %d", __FUNCTION__, port->number, baudrate);
+
+ /* Calculate the Divisor */
+ status = calc_baud_rate_divisor(baudrate, &divisor);
+ if (status) {
+ err("%s - bad baud rate", __FUNCTION__);
+ return status;
+ }
+
+ /* Enable access to divisor latch */
+ data = mos7720_port->shadowLCR | UART_LCR_DLAB;
+ mos7720_port->shadowLCR = data;
+ send_mos_cmd(serial, MOS_WRITE, number, UART_LCR, &data);
+
+ /* Write the divisor */
+ data = ((unsigned char)(divisor & 0xff));
+ send_mos_cmd(serial, MOS_WRITE, number, 0x00, &data);
+
+ data = ((unsigned char)((divisor & 0xff00) >> 8));
+ send_mos_cmd(serial, MOS_WRITE, number, 0x01, &data);
+
+ /* Disable access to divisor latch */
+ data = mos7720_port->shadowLCR & ~UART_LCR_DLAB;
+ mos7720_port->shadowLCR = data;
+ send_mos_cmd(serial, MOS_WRITE, number, 0x03, &data);
+
+ return status;
+}
+
+/*
+ * change_port_settings
+ * This routine is called to set the UART on the device to match
+ * the specified new settings.
+ */
+static void change_port_settings(struct moschip_port *mos7720_port,
+ struct termios *old_termios)
+{
+ struct usb_serial_port *port;
+ struct usb_serial *serial;
+ struct tty_struct *tty;
+ int baud;
+ unsigned cflag;
+ unsigned iflag;
+ __u8 mask = 0xff;
+ __u8 lData;
+ __u8 lParity;
+ __u8 lStop;
+ int status;
+ int port_number;
+ char data;
+
+ if (mos7720_port == NULL)
+ return ;
+
+ port = mos7720_port->port;
+ serial = port->serial;
+ port_number = port->number - port->serial->minor;
+
+ dbg("%s - port %d", __FUNCTION__, port->number);
+
+ if (!mos7720_port->open) {
+ dbg("%s - port not opened", __FUNCTION__);
+ return;
+ }
+
+ tty = mos7720_port->port->tty;
+
+ if ((!tty) || (!tty->termios)) {
+ dbg("%s - no tty structures", __FUNCTION__);
+ return;
+ }
+
+ dbg("%s: Entering ..........", __FUNCTION__);
+
+ lData = UART_LCR_WLEN8;
+ lStop = 0x00; /* 1 stop bit */
+ lParity = 0x00; /* No parity */
+
+ cflag = tty->termios->c_cflag;
+ iflag = tty->termios->c_iflag;
+
+ /* Change the number of bits */
+ switch (cflag & CSIZE) {
+ case CS5:
+ lData = UART_LCR_WLEN5;
+ mask = 0x1f;
+ break;
+
+ case CS6:
+ lData = UART_LCR_WLEN6;
+ mask = 0x3f;
+ break;
+
+ case CS7:
+ lData = UART_LCR_WLEN7;
+ mask = 0x7f;
+ break;
+ default:
+ case CS8:
+ lData = UART_LCR_WLEN8;
+ break;
+ }
+
+ /* Change the Parity bit */
+ if (cflag & PARENB) {
+ if (cflag & PARODD) {
+ lParity = UART_LCR_PARITY;
+ dbg("%s - parity = odd", __FUNCTION__);
+ } else {
+ lParity = (UART_LCR_EPAR | UART_LCR_PARITY);
+ 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 = UART_LCR_STOP;
+ dbg("%s - stop bits = 2", __FUNCTION__);
+ } else {
+ lStop = 0x00;
+ dbg("%s - stop bits = 1", __FUNCTION__);
+ }
+
+#define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
+#define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
+#define LCR_PAR_MASK 0x38 /* Mask for parity field */
+
+ /* Update the LCR with the correct value */
+ mos7720_port->shadowLCR &= ~(LCR_BITS_MASK | LCR_STOP_MASK | LCR_PAR_MASK);
+ mos7720_port->shadowLCR |= (lData | lParity | lStop);
+
+
+ /* Disable Interrupts */
+ data = 0x00;
+ send_mos_cmd(serial,MOS_WRITE,port->number - port->serial->minor, UART_IER, &data);
+
+ data = 0x00;
+ send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data);
+
+ data = 0xcf;
+ send_mos_cmd(serial, MOS_WRITE, port_number, UART_FCR, &data);
+
+ /* Send the updated LCR value to the mos7720 */
+ data = mos7720_port->shadowLCR;
+ send_mos_cmd(serial, MOS_WRITE, port_number, UART_LCR, &data);
+
+ data = 0x00b;
+ mos7720_port->shadowMCR = data;
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
+ data = 0x00b;
+ send_mos_cmd(serial, MOS_WRITE, port_number, 0x04, &data);
+
+ /* set up the MCR register and send it to the mos7720 */
+ mos7720_port->shadowMCR = UART_MCR_OUT2;
+ if (cflag & CBAUD)
+ mos7720_port->shadowMCR |= (UART_MCR_DTR | UART_MCR_RTS);
+
+ if (cflag & CRTSCTS) {
+ mos7720_port->shadowMCR |= (UART_MCR_XONANY);
+
+ /* To set hardware flow control to the specified *
+ * serial port, in SP1/2_CONTROL_REG */
+ if (port->number) {
+ data = 0x001;
+ send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT,
+ 0x08, &data);
+ } else {
+ data = 0x002;
+ send_mos_cmd(serial, MOS_WRITE, MOS_MAX_PORT,
+ 0x08, &data);
+ }
+ } else {
+ mos7720_port->shadowMCR &= ~(UART_MCR_XONANY);
+ }
+
+ data = mos7720_port->shadowMCR;
+ send_mos_cmd(serial, MOS_WRITE, port_number, UART_MCR, &data);
+
+ /* Determine divisor based on baud rate */
+ baud = tty_get_baud_rate(tty);
+ if (!baud) {
+ /* pick a default, any default... */
+ dbg("Picked default baud...");
+ baud = 9600;
+ }
+
+ if (baud >= 230400) {
+ set_higher_rates(mos7720_port, baud);
+ /* Enable Interrupts */
+ data = 0x0c;
+ send_mos_cmd(serial, MOS_WRITE, port_number, UART_IER, &data);
+ return;
+ }
+
+ dbg("%s - baud rate = %d", __FUNCTION__, baud);
+ status = send_cmd_write_baud_rate(mos7720_port, baud);
+
+ /* Enable Interrupts */
+ data = 0x0c;
+ send_mos_cmd(serial, MOS_WRITE, port_number, UART_IER, &data);
+
+ if (port->read_urb->status != -EINPROGRESS) {
+ port->read_urb->dev = serial->dev;
+
+ status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
+ if (status)
+ dbg("usb_submit_urb(read bulk) failed, status = %d",
+ status);
+ }
+ return;
+}
+
+/*
+ * mos7720_set_termios
+ * this function is called by the tty driver when it wants to change the
+ * termios structure.
+ */
+static void mos7720_set_termios(struct usb_serial_port *port,
+ struct termios *old_termios)
+{
+ int status;
+ unsigned int cflag;
+ struct usb_serial *serial;
+ struct moschip_port *mos7720_port;
+ struct tty_struct *tty;
+
+ serial = port->serial;
+
+ mos7720_port = usb_get_serial_port_data(port);
+
+ if (mos7720_port == NULL)
+ return;
+
+ tty = port->tty;
+
+ if (!port->tty || !port->tty->termios) {
+ dbg("%s - no tty or termios", __FUNCTION__);
+ return;
+ }
+
+ if (!mos7720_port->open) {
+ dbg("%s - port not opened", __FUNCTION__);
+ return;
+ }
+
+ dbg("%s\n","setting termios - ASPIRE");
+
+ cflag = tty->termios->c_cflag;
+
+ if (!cflag) {
+ printk("%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("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 */
+ change_port_settings(mos7720_port, old_termios);
+
+ if(!port->read_urb) {
+ dbg("%s","URB KILLED !!!!!\n");
+ return;
+ }
+
+ if(port->read_urb->status != -EINPROGRESS) {
+ port->read_urb->dev = serial->dev;
+ status = usb_submit_urb(port->read_urb, GFP_ATOMIC);
+ if (status)
+ dbg("usb_submit_urb(read bulk) failed, status = %d",
+ status);
+ }
+ return;
+}
+
+/*
+ * 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 get_lsr_info(struct moschip_port *mos7720_port,
+ unsigned int __user *value)
+{
+ int count;
+ unsigned int result = 0;
+
+ count = mos7720_chars_in_buffer(mos7720_port->port);
+ if (count == 0) {
+ dbg("%s -- Empty", __FUNCTION__);
+ result = TIOCSER_TEMT;
+ }
+
+ if (copy_to_user(value, &result, sizeof(int)))
+ return -EFAULT;
+ return 0;
+}
+
+/*
+ * get_number_bytes_avail - get number of bytes available
+ *
+ * Purpose: Let user call ioctl to get the count of number of bytes available.
+ */
+static int get_number_bytes_avail(struct moschip_port *mos7720_port,
+ unsigned int __user *value)
+{
+ unsigned int result = 0;
+ struct tty_struct *tty = mos7720_port->port->tty;
+
+ if (!tty)
+ return -ENOIOCTLCMD;
+
+ result = tty->read_cnt;
+
+ dbg("%s(%d) = %d", __FUNCTION__, mos7720_port->port->number, result);
+ if (copy_to_user(value, &result, sizeof(int)))
+ return -EFAULT;
+
+ return -ENOIOCTLCMD;
+}
+
+static int set_modem_info(struct moschip_port *mos7720_port, unsigned int cmd,
+ unsigned int __user *value)
+{
+ unsigned int mcr ;
+ unsigned int arg;
+ unsigned char data;
+
+ struct usb_serial_port *port;
+
+ if (mos7720_port == NULL)
+ return -1;
+
+ port = (struct usb_serial_port*)mos7720_port->port;
+ mcr = mos7720_port->shadowMCR;
+
+ if (copy_from_user(&arg, value, sizeof(int)))
+ return -EFAULT;
+
+ switch (cmd) {
+ case TIOCMBIS:
+ if (arg & TIOCM_RTS)
+ mcr |= UART_MCR_RTS;
+ if (arg & TIOCM_DTR)
+ mcr |= UART_MCR_RTS;
+ if (arg & TIOCM_LOOP)
+ mcr |= UART_MCR_LOOP;
+ break;
+
+ case TIOCMBIC:
+ if (arg & TIOCM_RTS)
+ mcr &= ~UART_MCR_RTS;
+ if (arg & TIOCM_DTR)
+ mcr &= ~UART_MCR_RTS;
+ if (arg & TIOCM_LOOP)
+ mcr &= ~UART_MCR_LOOP;
+ break;
+
+ case TIOCMSET:
+ /* turn off the RTS and DTR and LOOPBACK
+ * and then only turn on what was asked to */
+ mcr &= ~(UART_MCR_RTS | UART_MCR_DTR | UART_MCR_LOOP);
+ mcr |= ((arg & TIOCM_RTS) ? UART_MCR_RTS : 0);
+ mcr |= ((arg & TIOCM_DTR) ? UART_MCR_DTR : 0);
+ mcr |= ((arg & TIOCM_LOOP) ? UART_MCR_LOOP : 0);
+ break;
+ }
+
+ mos7720_port->shadowMCR = mcr;
+
+ data = mos7720_port->shadowMCR;
+ send_mos_cmd(port->serial, MOS_WRITE,
+ port->number - port->serial->minor, UART_MCR, &data);
+
+ return 0;
+}
+
+static int get_modem_info(struct moschip_port *mos7720_port,
+ unsigned int __user *value)
+{
+ unsigned int result = 0;
+ unsigned int msr = mos7720_port->shadowMSR;
+ unsigned int mcr = mos7720_port->shadowMCR;
+
+ result = ((mcr & UART_MCR_DTR) ? TIOCM_DTR: 0) /* 0x002 */
+ | ((mcr & UART_MCR_RTS) ? TIOCM_RTS: 0) /* 0x004 */
+ | ((msr & UART_MSR_CTS) ? TIOCM_CTS: 0) /* 0x020 */
+ | ((msr & UART_MSR_DCD) ? TIOCM_CAR: 0) /* 0x040 */
+ | ((msr & UART_MSR_RI) ? TIOCM_RI: 0) /* 0x080 */
+ | ((msr & UART_MSR_DSR) ? TIOCM_DSR: 0); /* 0x100 */
+
+
+ dbg("%s -- %x", __FUNCTION__, result);
+
+ if (copy_to_user(value, &result, sizeof(int)))
+ return -EFAULT;
+ return 0;
+}
+
+static int get_serial_info(struct moschip_port *mos7720_port,
+ struct serial_struct __user *retinfo)
+{
+ struct serial_struct tmp;
+
+ if (!retinfo)
+ return -EFAULT;
+
+ memset(&tmp, 0, sizeof(tmp));
+
+ tmp.type = PORT_16550A;
+ tmp.line = mos7720_port->port->serial->minor;
+ tmp.port = mos7720_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;
+}
+
+static int mos7720_ioctl(struct usb_serial_port *port, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ struct moschip_port *mos7720_port;
+ struct async_icount cnow;
+ struct async_icount cprev;
+ struct serial_icounter_struct icount;
+
+ mos7720_port = usb_get_serial_port_data(port);
+ if (mos7720_port == NULL)
+ return -ENODEV;
+
+ dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
+
+ switch (cmd) {
+ case TIOCINQ:
+ /* return number of bytes available */
+ dbg("%s (%d) TIOCINQ", __FUNCTION__, port->number);
+ return get_number_bytes_avail(mos7720_port,
+ (unsigned int __user *)arg);
+ break;
+
+ case TIOCSERGETLSR:
+ dbg("%s (%d) TIOCSERGETLSR", __FUNCTION__, port->number);
+ return get_lsr_info(mos7720_port, (unsigned int __user *)arg);
+ return 0;
+
+ case TIOCMBIS:
+ case TIOCMBIC:
+ case TIOCMSET:
+ dbg("%s (%d) TIOCMSET/TIOCMBIC/TIOCMSET", __FUNCTION__,
+ port->number);
+ return set_modem_info(mos7720_port, cmd,
+ (unsigned int __user *)arg);
+
+ case TIOCMGET:
+ dbg("%s (%d) TIOCMGET", __FUNCTION__, port->number);
+ return get_modem_info(mos7720_port,
+ (unsigned int __user *)arg);
+
+ case TIOCGSERIAL:
+ dbg("%s (%d) TIOCGSERIAL", __FUNCTION__, port->number);
+ return get_serial_info(mos7720_port,
+ (struct serial_struct __user *)arg);
+
+ case TIOCSSERIAL:
+ dbg("%s (%d) TIOCSSERIAL", __FUNCTION__, port->number);
+ break;
+
+ case TIOCMIWAIT:
+ dbg("%s (%d) TIOCMIWAIT", __FUNCTION__, port->number);
+ cprev = mos7720_port->icount;
+ while (1) {
+ if (signal_pending(current))
+ return -ERESTARTSYS;
+ cnow = mos7720_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 = mos7720_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 __user *)arg, &icount, sizeof(icount)))
+ return -EFAULT;
+ return 0;
+ }
+
+ return -ENOIOCTLCMD;
+}
+
+static int mos7720_startup(struct usb_serial *serial)
+{
+ struct moschip_serial *mos7720_serial;
+ struct moschip_port *mos7720_port;
+ struct usb_device *dev;
+ int i;
+ char data;
+
+ dbg("%s: Entering ..........", __FUNCTION__);
+
+ if (!serial) {
+ dbg("Invalid Handler");
+ return -ENODEV;
+ }
+
+ dev = serial->dev;
+
+ /* create our private serial structure */
+ mos7720_serial = kzalloc(sizeof(struct moschip_serial), GFP_KERNEL);
+ if (mos7720_serial == NULL) {
+ err("%s - Out of memory", __FUNCTION__);
+ return -ENOMEM;
+ }
+
+ usb_set_serial_data(serial, mos7720_serial);
+
+ /* we set up the pointers to the endpoints in the mos7720_open *
+ * function, as the structures aren't created yet. */
+
+ /* set up port private structures */
+ for (i = 0; i < serial->num_ports; ++i) {
+ mos7720_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
+ if (mos7720_port == NULL) {
+ err("%s - Out of memory", __FUNCTION__);
+ usb_set_serial_data(serial, NULL);
+ kfree(mos7720_serial);
+ return -ENOMEM;
+ }
+
+ /* Initialize all port interrupt end point to port 0 int
+ * endpoint. Our device has only one interrupt endpoint
+ * comman to all ports */
+ serial->port[i]->interrupt_in_endpointAddress = serial->port[0]->interrupt_in_endpointAddress;
+
+ mos7720_port->port = serial->port[i];
+ usb_set_serial_port_data(serial->port[i], mos7720_port);
+
+ dbg("port number is %d", serial->port[i]->number);
+ dbg("serial number is %d", serial->minor);
+ }
+
+
+ /* setting configuration feature to one */
+ usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
+ (__u8)0x03, 0x00,0x01,0x00, NULL, 0x00, 5*HZ);
+
+ send_mos_cmd(serial,MOS_READ,0x00, UART_LSR, &data); // LSR For Port 1
+ dbg("LSR:%x",data);
+
+ send_mos_cmd(serial,MOS_READ,0x01, UART_LSR, &data); // LSR For Port 2
+ dbg("LSR:%x",data);
+
+ return 0;
+}
+
+static void mos7720_shutdown(struct usb_serial *serial)
+{
+ int i;
+
+ /* free private structure allocated for serial port */
+ for (i=0; i < serial->num_ports; ++i) {
+ kfree(usb_get_serial_port_data(serial->port[i]));
+ usb_set_serial_port_data(serial->port[i], NULL);
+ }
+
+ /* free private structure allocated for serial device */
+ kfree(usb_get_serial_data(serial));
+ usb_set_serial_data(serial, NULL);
+}
+
+static struct usb_serial_driver moschip7720_2port_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "moschip7720",
+ },
+ .description = "Moschip 2 port adapter",
+ .id_table = moschip_port_id_table,
+ .num_interrupt_in = 1,
+ .num_bulk_in = 2,
+ .num_bulk_out = 2,
+ .num_ports = 2,
+ .open = mos7720_open,
+ .close = mos7720_close,
+ .throttle = mos7720_throttle,
+ .unthrottle = mos7720_unthrottle,
+ .attach = mos7720_startup,
+ .shutdown = mos7720_shutdown,
+ .ioctl = mos7720_ioctl,
+ .set_termios = mos7720_set_termios,
+ .write = mos7720_write,
+ .write_room = mos7720_write_room,
+ .chars_in_buffer = mos7720_chars_in_buffer,
+ .break_ctl = mos7720_break,
+ .read_bulk_callback = mos7720_bulk_in_callback,
+};
+
+static struct usb_driver usb_driver = {
+ .name = "moschip7720",
+ .probe = usb_serial_probe,
+ .disconnect = usb_serial_disconnect,
+ .id_table = moschip_port_id_table,
+};
+
+static int __init moschip7720_init(void)
+{
+ int retval;
+
+ dbg("%s: Entering ..........", __FUNCTION__);
+
+ /* Register with the usb serial */
+ retval = usb_serial_register(&moschip7720_2port_driver);
+ if (retval)
+ goto failed_port_device_register;
+
+ info(DRIVER_DESC " " DRIVER_VERSION);
+
+ /* Register with the usb */
+ retval = usb_register(&usb_driver);
+ if (retval)
+ goto failed_usb_register;
+
+ return 0;
+
+failed_usb_register:
+ usb_serial_deregister(&moschip7720_2port_driver);
+
+failed_port_device_register:
+ return retval;
+}
+
+static void __exit moschip7720_exit(void)
+{
+ usb_deregister(&usb_driver);
+ usb_serial_deregister(&moschip7720_2port_driver);
+}
+
+module_init(moschip7720_init);
+module_exit(moschip7720_exit);
+
+/* Module information */
+MODULE_AUTHOR( DRIVER_AUTHOR );
+MODULE_DESCRIPTION( DRIVER_DESC );
+MODULE_LICENSE("GPL");
+
+module_param(debug, bool, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Debug enabled or not");
projects / platform / kernel / linux-rpi.git / commitdiff