diff options
Diffstat (limited to 'drivers/usb/serial/mos7840.c')
| -rw-r--r-- | drivers/usb/serial/mos7840.c | 2962 |
1 files changed, 2962 insertions, 0 deletions
diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c new file mode 100644 index 00000000000..95bf57166c5 --- /dev/null +++ b/drivers/usb/serial/mos7840.c @@ -0,0 +1,2962 @@ +/* + * 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"); |