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![Johan Hovold](/assets/img/avatar_default.png)
Fix null-pointer dereference on error path. Cc: stable <stable@kernel.org> Signed-off-by: Johan Hovold <jhovold@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2724 lines
76 KiB
C
2724 lines
76 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Clean ups from Moschip version and a few ioctl implementations by:
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* Paul B Schroeder <pschroeder "at" uplogix "dot" com>
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*
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* Originally based on drivers/usb/serial/io_edgeport.c which is:
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* Copyright (C) 2000 Inside Out Networks, All rights reserved.
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* Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
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*
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*/
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/tty.h>
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#include <linux/tty_driver.h>
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#include <linux/tty_flip.h>
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#include <linux/module.h>
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#include <linux/serial.h>
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#include <linux/usb.h>
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#include <linux/usb/serial.h>
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#include <linux/uaccess.h>
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/*
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* Version Information
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*/
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#define DRIVER_VERSION "1.3.2"
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#define DRIVER_DESC "Moschip 7840/7820 USB Serial Driver"
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/*
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* 16C50 UART register defines
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*/
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#define LCR_BITS_5 0x00 /* 5 bits/char */
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#define LCR_BITS_6 0x01 /* 6 bits/char */
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#define LCR_BITS_7 0x02 /* 7 bits/char */
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#define LCR_BITS_8 0x03 /* 8 bits/char */
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#define LCR_BITS_MASK 0x03 /* Mask for bits/char field */
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#define LCR_STOP_1 0x00 /* 1 stop bit */
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#define LCR_STOP_1_5 0x04 /* 1.5 stop bits (if 5 bits/char) */
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#define LCR_STOP_2 0x04 /* 2 stop bits (if 6-8 bits/char) */
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#define LCR_STOP_MASK 0x04 /* Mask for stop bits field */
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#define LCR_PAR_NONE 0x00 /* No parity */
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#define LCR_PAR_ODD 0x08 /* Odd parity */
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#define LCR_PAR_EVEN 0x18 /* Even parity */
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#define LCR_PAR_MARK 0x28 /* Force parity bit to 1 */
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#define LCR_PAR_SPACE 0x38 /* Force parity bit to 0 */
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#define LCR_PAR_MASK 0x38 /* Mask for parity field */
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#define LCR_SET_BREAK 0x40 /* Set Break condition */
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#define LCR_DL_ENABLE 0x80 /* Enable access to divisor latch */
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#define MCR_DTR 0x01 /* Assert DTR */
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#define MCR_RTS 0x02 /* Assert RTS */
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#define MCR_OUT1 0x04 /* Loopback only: Sets state of RI */
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#define MCR_MASTER_IE 0x08 /* Enable interrupt outputs */
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#define MCR_LOOPBACK 0x10 /* Set internal (digital) loopback mode */
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#define MCR_XON_ANY 0x20 /* Enable any char to exit XOFF mode */
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#define MOS7840_MSR_CTS 0x10 /* Current state of CTS */
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#define MOS7840_MSR_DSR 0x20 /* Current state of DSR */
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#define MOS7840_MSR_RI 0x40 /* Current state of RI */
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#define MOS7840_MSR_CD 0x80 /* Current state of CD */
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/*
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* Defines used for sending commands to port
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*/
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#define WAIT_FOR_EVER (HZ * 0) /* timeout urb is wait for ever */
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#define MOS_WDR_TIMEOUT (HZ * 5) /* default urb timeout */
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#define MOS_PORT1 0x0200
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#define MOS_PORT2 0x0300
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#define MOS_VENREG 0x0000
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#define MOS_MAX_PORT 0x02
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#define MOS_WRITE 0x0E
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#define MOS_READ 0x0D
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/* Requests */
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#define MCS_RD_RTYPE 0xC0
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#define MCS_WR_RTYPE 0x40
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#define MCS_RDREQ 0x0D
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#define MCS_WRREQ 0x0E
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#define MCS_CTRL_TIMEOUT 500
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#define VENDOR_READ_LENGTH (0x01)
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#define MAX_NAME_LEN 64
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#define ZLP_REG1 0x3A /* Zero_Flag_Reg1 58 */
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#define ZLP_REG5 0x3E /* Zero_Flag_Reg5 62 */
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/* For higher baud Rates use TIOCEXBAUD */
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#define TIOCEXBAUD 0x5462
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/* vendor id and device id defines */
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/* The native mos7840/7820 component */
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#define USB_VENDOR_ID_MOSCHIP 0x9710
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#define MOSCHIP_DEVICE_ID_7840 0x7840
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#define MOSCHIP_DEVICE_ID_7820 0x7820
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/* The native component can have its vendor/device id's overridden
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* in vendor-specific implementations. Such devices can be handled
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* by making a change here, in moschip_port_id_table, and in
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* moschip_id_table_combined
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*/
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#define USB_VENDOR_ID_BANDB 0x0856
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#define BANDB_DEVICE_ID_USO9ML2_2 0xAC22
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#define BANDB_DEVICE_ID_USO9ML2_4 0xAC24
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#define BANDB_DEVICE_ID_US9ML2_2 0xAC29
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#define BANDB_DEVICE_ID_US9ML2_4 0xAC30
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#define BANDB_DEVICE_ID_USPTL4_2 0xAC31
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#define BANDB_DEVICE_ID_USPTL4_4 0xAC32
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#define BANDB_DEVICE_ID_USOPTL4_2 0xAC42
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#define BANDB_DEVICE_ID_USOPTL4_4 0xAC44
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#define BANDB_DEVICE_ID_USOPTL2_4 0xAC24
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/* This driver also supports
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* ATEN UC2324 device using Moschip MCS7840
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* ATEN UC2322 device using Moschip MCS7820
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*/
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#define USB_VENDOR_ID_ATENINTL 0x0557
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#define ATENINTL_DEVICE_ID_UC2324 0x2011
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#define ATENINTL_DEVICE_ID_UC2322 0x7820
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/* Interrupt Routine Defines */
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#define SERIAL_IIR_RLS 0x06
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#define SERIAL_IIR_MS 0x00
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/*
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* Emulation of the bit mask on the LINE STATUS REGISTER.
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*/
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#define SERIAL_LSR_DR 0x0001
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#define SERIAL_LSR_OE 0x0002
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#define SERIAL_LSR_PE 0x0004
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#define SERIAL_LSR_FE 0x0008
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#define SERIAL_LSR_BI 0x0010
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#define MOS_MSR_DELTA_CTS 0x10
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#define MOS_MSR_DELTA_DSR 0x20
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#define MOS_MSR_DELTA_RI 0x40
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#define MOS_MSR_DELTA_CD 0x80
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/* Serial Port register Address */
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#define INTERRUPT_ENABLE_REGISTER ((__u16)(0x01))
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#define FIFO_CONTROL_REGISTER ((__u16)(0x02))
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#define LINE_CONTROL_REGISTER ((__u16)(0x03))
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#define MODEM_CONTROL_REGISTER ((__u16)(0x04))
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#define LINE_STATUS_REGISTER ((__u16)(0x05))
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#define MODEM_STATUS_REGISTER ((__u16)(0x06))
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#define SCRATCH_PAD_REGISTER ((__u16)(0x07))
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#define DIVISOR_LATCH_LSB ((__u16)(0x00))
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#define DIVISOR_LATCH_MSB ((__u16)(0x01))
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#define CLK_MULTI_REGISTER ((__u16)(0x02))
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#define CLK_START_VALUE_REGISTER ((__u16)(0x03))
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#define SERIAL_LCR_DLAB ((__u16)(0x0080))
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/*
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* URB POOL related defines
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*/
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#define NUM_URBS 16 /* URB Count */
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#define URB_TRANSFER_BUFFER_SIZE 32 /* URB Size */
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static const struct usb_device_id moschip_port_id_table[] = {
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{USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
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{USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
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{USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
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{USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
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{} /* terminating entry */
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};
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static const struct usb_device_id moschip_id_table_combined[] __devinitconst = {
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{USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7840)},
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{USB_DEVICE(USB_VENDOR_ID_MOSCHIP, MOSCHIP_DEVICE_ID_7820)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_2)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USO9ML2_4)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_2)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_US9ML2_4)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_2)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USPTL4_4)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_2)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL4_4)},
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{USB_DEVICE(USB_VENDOR_ID_BANDB, BANDB_DEVICE_ID_USOPTL2_4)},
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{USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2324)},
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{USB_DEVICE(USB_VENDOR_ID_ATENINTL, ATENINTL_DEVICE_ID_UC2322)},
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{} /* terminating entry */
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};
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MODULE_DEVICE_TABLE(usb, moschip_id_table_combined);
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/* This structure holds all of the local port information */
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struct moschip_port {
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int port_num; /*Actual port number in the device(1,2,etc) */
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struct urb *write_urb; /* write URB for this port */
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struct urb *read_urb; /* read URB for this port */
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struct urb *int_urb;
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__u8 shadowLCR; /* last LCR value received */
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__u8 shadowMCR; /* last MCR value received */
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char open;
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char open_ports;
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char zombie;
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wait_queue_head_t wait_chase; /* for handling sleeping while waiting for chase to finish */
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wait_queue_head_t delta_msr_wait; /* for handling sleeping while waiting for msr change to happen */
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int delta_msr_cond;
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struct async_icount icount;
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struct usb_serial_port *port; /* loop back to the owner of this object */
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/* Offsets */
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__u8 SpRegOffset;
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__u8 ControlRegOffset;
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__u8 DcrRegOffset;
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/* for processing control URBS in interrupt context */
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struct urb *control_urb;
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struct usb_ctrlrequest *dr;
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char *ctrl_buf;
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int MsrLsr;
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spinlock_t pool_lock;
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struct urb *write_urb_pool[NUM_URBS];
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char busy[NUM_URBS];
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bool read_urb_busy;
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};
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static int debug;
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/*
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* mos7840_set_reg_sync
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* To set the Control register by calling usb_fill_control_urb function
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* by passing usb_sndctrlpipe function as parameter.
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*/
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static int mos7840_set_reg_sync(struct usb_serial_port *port, __u16 reg,
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__u16 val)
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{
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struct usb_device *dev = port->serial->dev;
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val = val & 0x00ff;
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dbg("mos7840_set_reg_sync offset is %x, value %x", reg, val);
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return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
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MCS_WR_RTYPE, val, reg, NULL, 0,
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MOS_WDR_TIMEOUT);
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}
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/*
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* mos7840_get_reg_sync
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* To set the Uart register by calling usb_fill_control_urb function by
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* passing usb_rcvctrlpipe function as parameter.
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*/
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static int mos7840_get_reg_sync(struct usb_serial_port *port, __u16 reg,
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__u16 *val)
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{
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struct usb_device *dev = port->serial->dev;
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int ret = 0;
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u8 *buf;
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buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
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MCS_RD_RTYPE, 0, reg, buf, VENDOR_READ_LENGTH,
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MOS_WDR_TIMEOUT);
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*val = buf[0];
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dbg("mos7840_get_reg_sync offset is %x, return val %x", reg, *val);
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kfree(buf);
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return ret;
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}
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/*
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* mos7840_set_uart_reg
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* To set the Uart register by calling usb_fill_control_urb function by
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* passing usb_sndctrlpipe function as parameter.
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*/
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static int mos7840_set_uart_reg(struct usb_serial_port *port, __u16 reg,
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__u16 val)
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{
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struct usb_device *dev = port->serial->dev;
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val = val & 0x00ff;
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/* For the UART control registers, the application number need
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to be Or'ed */
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if (port->serial->num_ports == 4) {
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val |= (((__u16) port->number -
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(__u16) (port->serial->minor)) + 1) << 8;
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dbg("mos7840_set_uart_reg application number is %x", val);
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} else {
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if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
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val |= (((__u16) port->number -
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(__u16) (port->serial->minor)) + 1) << 8;
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dbg("mos7840_set_uart_reg application number is %x",
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val);
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} else {
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val |=
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(((__u16) port->number -
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(__u16) (port->serial->minor)) + 2) << 8;
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dbg("mos7840_set_uart_reg application number is %x",
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val);
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}
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}
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return usb_control_msg(dev, usb_sndctrlpipe(dev, 0), MCS_WRREQ,
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MCS_WR_RTYPE, val, reg, NULL, 0,
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MOS_WDR_TIMEOUT);
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}
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/*
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* mos7840_get_uart_reg
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* To set the Control register by calling usb_fill_control_urb function
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* by passing usb_rcvctrlpipe function as parameter.
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*/
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static int mos7840_get_uart_reg(struct usb_serial_port *port, __u16 reg,
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__u16 *val)
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{
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struct usb_device *dev = port->serial->dev;
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int ret = 0;
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__u16 Wval;
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u8 *buf;
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buf = kmalloc(VENDOR_READ_LENGTH, GFP_KERNEL);
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if (!buf)
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return -ENOMEM;
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/* dbg("application number is %4x",
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(((__u16)port->number - (__u16)(port->serial->minor))+1)<<8); */
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/* Wval is same as application number */
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if (port->serial->num_ports == 4) {
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Wval =
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(((__u16) port->number - (__u16) (port->serial->minor)) +
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1) << 8;
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dbg("mos7840_get_uart_reg application number is %x", Wval);
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} else {
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if (((__u16) port->number - (__u16) (port->serial->minor)) == 0) {
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Wval = (((__u16) port->number -
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(__u16) (port->serial->minor)) + 1) << 8;
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dbg("mos7840_get_uart_reg application number is %x",
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Wval);
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} else {
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Wval = (((__u16) port->number -
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(__u16) (port->serial->minor)) + 2) << 8;
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dbg("mos7840_get_uart_reg application number is %x",
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Wval);
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}
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}
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ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0), MCS_RDREQ,
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MCS_RD_RTYPE, Wval, reg, buf, VENDOR_READ_LENGTH,
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MOS_WDR_TIMEOUT);
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*val = buf[0];
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kfree(buf);
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return ret;
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}
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static void mos7840_dump_serial_port(struct moschip_port *mos7840_port)
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{
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dbg("***************************************");
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dbg("SpRegOffset is %2x", mos7840_port->SpRegOffset);
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dbg("ControlRegOffset is %2x", mos7840_port->ControlRegOffset);
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dbg("DCRRegOffset is %2x", mos7840_port->DcrRegOffset);
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dbg("***************************************");
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}
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/************************************************************************/
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/************************************************************************/
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/* I N T E R F A C E F U N C T I O N S */
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/* I N T E R F A C E F U N C T I O N S */
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/************************************************************************/
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/************************************************************************/
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static inline void mos7840_set_port_private(struct usb_serial_port *port,
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struct moschip_port *data)
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{
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usb_set_serial_port_data(port, (void *)data);
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}
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static inline struct moschip_port *mos7840_get_port_private(struct
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usb_serial_port
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*port)
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{
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return (struct moschip_port *)usb_get_serial_port_data(port);
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}
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static void mos7840_handle_new_msr(struct moschip_port *port, __u8 new_msr)
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{
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struct moschip_port *mos7840_port;
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struct async_icount *icount;
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mos7840_port = port;
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icount = &mos7840_port->icount;
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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++;
|
|
smp_wmb();
|
|
}
|
|
if (new_msr & MOS_MSR_DELTA_DSR) {
|
|
icount->dsr++;
|
|
smp_wmb();
|
|
}
|
|
if (new_msr & MOS_MSR_DELTA_CD) {
|
|
icount->dcd++;
|
|
smp_wmb();
|
|
}
|
|
if (new_msr & MOS_MSR_DELTA_RI) {
|
|
icount->rng++;
|
|
smp_wmb();
|
|
}
|
|
}
|
|
}
|
|
|
|
static void mos7840_handle_new_lsr(struct moschip_port *port, __u8 new_lsr)
|
|
{
|
|
struct async_icount *icount;
|
|
|
|
dbg("%s - %02x", __func__, 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++;
|
|
smp_wmb();
|
|
}
|
|
if (new_lsr & SERIAL_LSR_OE) {
|
|
icount->overrun++;
|
|
smp_wmb();
|
|
}
|
|
if (new_lsr & SERIAL_LSR_PE) {
|
|
icount->parity++;
|
|
smp_wmb();
|
|
}
|
|
if (new_lsr & SERIAL_LSR_FE) {
|
|
icount->frame++;
|
|
smp_wmb();
|
|
}
|
|
}
|
|
|
|
/************************************************************************/
|
|
/************************************************************************/
|
|
/* 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)
|
|
{
|
|
unsigned char *data;
|
|
struct moschip_port *mos7840_port;
|
|
__u8 regval = 0x0;
|
|
int result = 0;
|
|
int status = urb->status;
|
|
|
|
mos7840_port = urb->context;
|
|
|
|
switch (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", __func__,
|
|
status);
|
|
return;
|
|
default:
|
|
dbg("%s - nonzero urb status received: %d", __func__,
|
|
status);
|
|
goto exit;
|
|
}
|
|
|
|
dbg("%s urb buffer size is %d", __func__, urb->actual_length);
|
|
dbg("%s mos7840_port->MsrLsr is %d port %d", __func__,
|
|
mos7840_port->MsrLsr, mos7840_port->port_num);
|
|
data = urb->transfer_buffer;
|
|
regval = (__u8) data[0];
|
|
dbg("%s data is %x", __func__, 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:
|
|
spin_lock(&mos7840_port->pool_lock);
|
|
if (!mos7840_port->zombie)
|
|
result = usb_submit_urb(mos7840_port->int_urb, GFP_ATOMIC);
|
|
spin_unlock(&mos7840_port->pool_lock);
|
|
if (result) {
|
|
dev_err(&urb->dev->dev,
|
|
"%s - Error %d submitting interrupt urb\n",
|
|
__func__, result);
|
|
}
|
|
}
|
|
|
|
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 = mcs->dr;
|
|
unsigned char *buffer = mcs->ctrl_buf;
|
|
int ret;
|
|
|
|
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)
|
|
{
|
|
int result;
|
|
int length;
|
|
struct moschip_port *mos7840_port;
|
|
struct usb_serial *serial;
|
|
__u16 Data;
|
|
unsigned char *data;
|
|
__u8 sp[5], st;
|
|
int i, rv = 0;
|
|
__u16 wval, wreg = 0;
|
|
int status = urb->status;
|
|
|
|
dbg("%s", " : Entering");
|
|
|
|
switch (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", __func__,
|
|
status);
|
|
return;
|
|
default:
|
|
dbg("%s - nonzero urb status received: %d", __func__,
|
|
status);
|
|
goto exit;
|
|
}
|
|
|
|
length = urb->actual_length;
|
|
data = urb->transfer_buffer;
|
|
|
|
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", "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 !!!", 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");
|
|
mos7840_port->MsrLsr = 1;
|
|
wreg = LINE_STATUS_REGISTER;
|
|
break;
|
|
case SERIAL_IIR_MS:
|
|
dbg("Serial Port %d: Modem status change", i);
|
|
mos7840_port->MsrLsr = 0;
|
|
wreg = MODEM_STATUS_REGISTER;
|
|
break;
|
|
}
|
|
spin_lock(&mos7840_port->pool_lock);
|
|
if (!mos7840_port->zombie) {
|
|
rv = mos7840_get_reg(mos7840_port, wval, wreg, &Data);
|
|
} else {
|
|
spin_unlock(&mos7840_port->pool_lock);
|
|
return;
|
|
}
|
|
spin_unlock(&mos7840_port->pool_lock);
|
|
}
|
|
}
|
|
}
|
|
if (!(rv < 0))
|
|
/* the completion handler for the control urb will resubmit */
|
|
return;
|
|
exit:
|
|
result = usb_submit_urb(urb, GFP_ATOMIC);
|
|
if (result) {
|
|
dev_err(&urb->dev->dev,
|
|
"%s - Error %d submitting interrupt urb\n",
|
|
__func__, result);
|
|
}
|
|
}
|
|
|
|
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)
|
|
{
|
|
int retval;
|
|
unsigned char *data;
|
|
struct usb_serial *serial;
|
|
struct usb_serial_port *port;
|
|
struct moschip_port *mos7840_port;
|
|
struct tty_struct *tty;
|
|
int status = urb->status;
|
|
|
|
mos7840_port = urb->context;
|
|
if (!mos7840_port) {
|
|
dbg("%s", "NULL mos7840_port pointer");
|
|
return;
|
|
}
|
|
|
|
if (status) {
|
|
dbg("nonzero read bulk status received: %d", status);
|
|
mos7840_port->read_urb_busy = false;
|
|
return;
|
|
}
|
|
|
|
port = (struct usb_serial_port *)mos7840_port->port;
|
|
if (mos7840_port_paranoia_check(port, __func__)) {
|
|
dbg("%s", "Port Paranoia failed");
|
|
mos7840_port->read_urb_busy = false;
|
|
return;
|
|
}
|
|
|
|
serial = mos7840_get_usb_serial(port, __func__);
|
|
if (!serial) {
|
|
dbg("%s", "Bad serial pointer");
|
|
mos7840_port->read_urb_busy = false;
|
|
return;
|
|
}
|
|
|
|
dbg("%s", "Entering... ");
|
|
|
|
data = urb->transfer_buffer;
|
|
|
|
dbg("%s", "Entering ...........");
|
|
|
|
if (urb->actual_length) {
|
|
tty = tty_port_tty_get(&mos7840_port->port->port);
|
|
if (tty) {
|
|
tty_insert_flip_string(tty, data, urb->actual_length);
|
|
dbg(" %s ", data);
|
|
tty_flip_buffer_push(tty);
|
|
tty_kref_put(tty);
|
|
}
|
|
mos7840_port->icount.rx += urb->actual_length;
|
|
smp_wmb();
|
|
dbg("mos7840_port->icount.rx is %d:",
|
|
mos7840_port->icount.rx);
|
|
}
|
|
|
|
if (!mos7840_port->read_urb) {
|
|
dbg("%s", "URB KILLED !!!");
|
|
mos7840_port->read_urb_busy = false;
|
|
return;
|
|
}
|
|
|
|
|
|
mos7840_port->read_urb->dev = serial->dev;
|
|
|
|
mos7840_port->read_urb_busy = true;
|
|
retval = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
|
|
|
|
if (retval) {
|
|
dbg("usb_submit_urb(read bulk) failed, retval = %d", retval);
|
|
mos7840_port->read_urb_busy = false;
|
|
}
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* 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 moschip_port *mos7840_port;
|
|
struct tty_struct *tty;
|
|
int status = urb->status;
|
|
int i;
|
|
|
|
mos7840_port = urb->context;
|
|
spin_lock(&mos7840_port->pool_lock);
|
|
for (i = 0; i < NUM_URBS; i++) {
|
|
if (urb == mos7840_port->write_urb_pool[i]) {
|
|
mos7840_port->busy[i] = 0;
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock(&mos7840_port->pool_lock);
|
|
|
|
if (status) {
|
|
dbg("nonzero write bulk status received:%d", status);
|
|
return;
|
|
}
|
|
|
|
if (mos7840_port_paranoia_check(mos7840_port->port, __func__)) {
|
|
dbg("%s", "Port Paranoia failed");
|
|
return;
|
|
}
|
|
|
|
dbg("%s", "Entering .........");
|
|
|
|
tty = tty_port_tty_get(&mos7840_port->port->port);
|
|
if (tty && mos7840_port->open)
|
|
tty_wakeup(tty);
|
|
tty_kref_put(tty);
|
|
|
|
}
|
|
|
|
/************************************************************************/
|
|
/* 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 tty_struct *tty, struct usb_serial_port *port)
|
|
{
|
|
int response;
|
|
int j;
|
|
struct usb_serial *serial;
|
|
struct urb *urb;
|
|
__u16 Data;
|
|
int status;
|
|
struct moschip_port *mos7840_port;
|
|
struct moschip_port *port0;
|
|
|
|
dbg ("%s enter", __func__);
|
|
|
|
if (mos7840_port_paranoia_check(port, __func__)) {
|
|
dbg("%s", "Port Paranoia failed");
|
|
return -ENODEV;
|
|
}
|
|
|
|
serial = port->serial;
|
|
|
|
if (mos7840_serial_paranoia_check(serial, __func__)) {
|
|
dbg("%s", "Serial Paranoia failed");
|
|
return -ENODEV;
|
|
}
|
|
|
|
mos7840_port = mos7840_get_port_private(port);
|
|
port0 = mos7840_get_port_private(serial->port[0]);
|
|
|
|
if (mos7840_port == NULL || port0 == NULL)
|
|
return -ENODEV;
|
|
|
|
usb_clear_halt(serial->dev, port->write_urb->pipe);
|
|
usb_clear_halt(serial->dev, port->read_urb->pipe);
|
|
port0->open_ports++;
|
|
|
|
/* Initialising the write urb pool */
|
|
for (j = 0; j < NUM_URBS; ++j) {
|
|
urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
mos7840_port->write_urb_pool[j] = urb;
|
|
|
|
if (urb == NULL) {
|
|
dev_err(&port->dev, "No more urbs???\n");
|
|
continue;
|
|
}
|
|
|
|
urb->transfer_buffer = kmalloc(URB_TRANSFER_BUFFER_SIZE,
|
|
GFP_KERNEL);
|
|
if (!urb->transfer_buffer) {
|
|
usb_free_urb(urb);
|
|
mos7840_port->write_urb_pool[j] = NULL;
|
|
dev_err(&port->dev,
|
|
"%s-out of memory for urb buffers.\n",
|
|
__func__);
|
|
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 */
|
|
|
|
Data = 0x0;
|
|
status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
|
|
if (status < 0) {
|
|
dbg("Reading Spreg failed");
|
|
return -1;
|
|
}
|
|
Data |= 0x80;
|
|
status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
|
|
if (status < 0) {
|
|
dbg("writing Spreg failed");
|
|
return -1;
|
|
}
|
|
|
|
Data &= ~0x80;
|
|
status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
|
|
if (status < 0) {
|
|
dbg("writing Spreg failed");
|
|
return -1;
|
|
}
|
|
/* End of block to be checked */
|
|
|
|
Data = 0x0;
|
|
status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
|
|
&Data);
|
|
if (status < 0) {
|
|
dbg("Reading Controlreg failed");
|
|
return -1;
|
|
}
|
|
Data |= 0x08; /* Driver done bit */
|
|
Data |= 0x20; /* rx_disable */
|
|
status = mos7840_set_reg_sync(port,
|
|
mos7840_port->ControlRegOffset, Data);
|
|
if (status < 0) {
|
|
dbg("writing Controlreg failed");
|
|
return -1;
|
|
}
|
|
/* do register settings here */
|
|
/* Set all regs to the device default values. */
|
|
/***********************************
|
|
* First Disable all interrupts.
|
|
***********************************/
|
|
Data = 0x00;
|
|
status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
|
|
if (status < 0) {
|
|
dbg("disabling interrupts failed");
|
|
return -1;
|
|
}
|
|
/* Set FIFO_CONTROL_REGISTER to the default value */
|
|
Data = 0x00;
|
|
status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
|
|
if (status < 0) {
|
|
dbg("Writing FIFO_CONTROL_REGISTER failed");
|
|
return -1;
|
|
}
|
|
|
|
Data = 0xcf;
|
|
status = mos7840_set_uart_reg(port, FIFO_CONTROL_REGISTER, Data);
|
|
if (status < 0) {
|
|
dbg("Writing FIFO_CONTROL_REGISTER failed");
|
|
return -1;
|
|
}
|
|
|
|
Data = 0x03;
|
|
status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
|
|
mos7840_port->shadowLCR = Data;
|
|
|
|
Data = 0x0b;
|
|
status = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, Data);
|
|
mos7840_port->shadowMCR = Data;
|
|
|
|
Data = 0x00;
|
|
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 = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
|
|
|
|
Data = 0x0c;
|
|
status = mos7840_set_uart_reg(port, DIVISOR_LATCH_LSB, Data);
|
|
|
|
Data = 0x0;
|
|
status = mos7840_set_uart_reg(port, DIVISOR_LATCH_MSB, Data);
|
|
|
|
Data = 0x00;
|
|
status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
|
|
|
|
Data = Data & ~SERIAL_LCR_DLAB;
|
|
status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
|
|
mos7840_port->shadowLCR = Data;
|
|
|
|
/* clearing Bulkin and Bulkout Fifo */
|
|
Data = 0x0;
|
|
status = mos7840_get_reg_sync(port, mos7840_port->SpRegOffset, &Data);
|
|
|
|
Data = Data | 0x0c;
|
|
status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
|
|
|
|
Data = Data & ~0x0c;
|
|
status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset, Data);
|
|
/* Finally enable all interrupts */
|
|
Data = 0x0c;
|
|
status = mos7840_set_uart_reg(port, INTERRUPT_ENABLE_REGISTER, Data);
|
|
|
|
/* clearing rx_disable */
|
|
Data = 0x0;
|
|
status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
|
|
&Data);
|
|
Data = Data & ~0x20;
|
|
status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
|
|
Data);
|
|
|
|
/* rx_negate */
|
|
Data = 0x0;
|
|
status = mos7840_get_reg_sync(port, mos7840_port->ControlRegOffset,
|
|
&Data);
|
|
Data = Data | 0x10;
|
|
status = mos7840_set_reg_sync(port, mos7840_port->ControlRegOffset,
|
|
Data);
|
|
|
|
/* 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 (port0->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) {
|
|
dev_err(&port->dev, "%s - Error %d submitting "
|
|
"interrupt urb\n", __func__, 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", port->number);
|
|
dbg("serial number is %d", port->serial->minor);
|
|
dbg("Bulkin endpoint is %d", port->bulk_in_endpointAddress);
|
|
dbg("BulkOut endpoint is %d", port->bulk_out_endpointAddress);
|
|
dbg("Interrupt endpoint is %d", port->interrupt_in_endpointAddress);
|
|
dbg("port's number in the device is %d", 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",
|
|
port->bulk_in_endpointAddress);
|
|
mos7840_port->read_urb_busy = true;
|
|
response = usb_submit_urb(mos7840_port->read_urb, GFP_KERNEL);
|
|
if (response) {
|
|
dev_err(&port->dev, "%s - Error %d submitting control urb\n",
|
|
__func__, response);
|
|
mos7840_port->read_urb_busy = false;
|
|
}
|
|
|
|
/* 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 */
|
|
/* Must set to enable ints! */
|
|
mos7840_port->shadowMCR = MCR_MASTER_IE;
|
|
/* 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("usb_serial serial:%p mos7840_port:%p\n usb_serial_port port:%p",
|
|
serial, mos7840_port, port);
|
|
|
|
dbg ("%s leave", __func__);
|
|
|
|
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 zero.
|
|
*****************************************************************************/
|
|
|
|
static int mos7840_chars_in_buffer(struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
int i;
|
|
int chars = 0;
|
|
unsigned long flags;
|
|
struct moschip_port *mos7840_port;
|
|
|
|
dbg("%s", " mos7840_chars_in_buffer:entering ...........");
|
|
|
|
if (mos7840_port_paranoia_check(port, __func__)) {
|
|
dbg("%s", "Invalid port");
|
|
return 0;
|
|
}
|
|
|
|
mos7840_port = mos7840_get_port_private(port);
|
|
if (mos7840_port == NULL) {
|
|
dbg("%s", "mos7840_break:leaving ...........");
|
|
return 0;
|
|
}
|
|
|
|
spin_lock_irqsave(&mos7840_port->pool_lock, flags);
|
|
for (i = 0; i < NUM_URBS; ++i)
|
|
if (mos7840_port->busy[i])
|
|
chars += URB_TRANSFER_BUFFER_SIZE;
|
|
spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
|
|
dbg("%s - returns %d", __func__, chars);
|
|
return chars;
|
|
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* 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 usb_serial *serial;
|
|
struct moschip_port *mos7840_port;
|
|
struct moschip_port *port0;
|
|
int j;
|
|
__u16 Data;
|
|
|
|
dbg("%s", "mos7840_close:entering...");
|
|
|
|
if (mos7840_port_paranoia_check(port, __func__)) {
|
|
dbg("%s", "Port Paranoia failed");
|
|
return;
|
|
}
|
|
|
|
serial = mos7840_get_usb_serial(port, __func__);
|
|
if (!serial) {
|
|
dbg("%s", "Serial Paranoia failed");
|
|
return;
|
|
}
|
|
|
|
mos7840_port = mos7840_get_port_private(port);
|
|
port0 = mos7840_get_port_private(serial->port[0]);
|
|
|
|
if (mos7840_port == NULL || port0 == 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]);
|
|
}
|
|
}
|
|
|
|
/* 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");
|
|
usb_kill_urb(mos7840_port->write_urb);
|
|
}
|
|
if (mos7840_port->read_urb) {
|
|
dbg("%s", "Shutdown bulk read");
|
|
usb_kill_urb(mos7840_port->read_urb);
|
|
mos7840_port->read_urb_busy = false;
|
|
}
|
|
if ((&mos7840_port->control_urb)) {
|
|
dbg("%s", "Shutdown control read");
|
|
/*/ usb_kill_urb (mos7840_port->control_urb); */
|
|
}
|
|
}
|
|
/* if(mos7840_port->ctrl_buf != NULL) */
|
|
/* kfree(mos7840_port->ctrl_buf); */
|
|
port0->open_ports--;
|
|
dbg("mos7840_num_open_ports in close%d:in port%d",
|
|
port0->open_ports, port->number);
|
|
if (port0->open_ports == 0) {
|
|
if (serial->port[0]->interrupt_in_urb) {
|
|
dbg("%s", "Shutdown interrupt_in_urb");
|
|
usb_kill_urb(serial->port[0]->interrupt_in_urb);
|
|
}
|
|
}
|
|
|
|
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", "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 timeout 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 tty_struct *tty,
|
|
struct moschip_port *mos7840_port)
|
|
{
|
|
int timeout = 1 * HZ;
|
|
int wait = 10;
|
|
int count;
|
|
|
|
while (1) {
|
|
count = mos7840_chars_in_buffer(tty);
|
|
|
|
/* 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", __func__);
|
|
return;
|
|
} else {
|
|
/* Reset timeout value back to seconds */
|
|
wait = 10;
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* mos7840_break
|
|
* this function sends a break to the port
|
|
*****************************************************************************/
|
|
static void mos7840_break(struct tty_struct *tty, int break_state)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
unsigned char data;
|
|
struct usb_serial *serial;
|
|
struct moschip_port *mos7840_port;
|
|
|
|
dbg("%s", "Entering ...........");
|
|
dbg("mos7840_break: Start");
|
|
|
|
if (mos7840_port_paranoia_check(port, __func__)) {
|
|
dbg("%s", "Port Paranoia failed");
|
|
return;
|
|
}
|
|
|
|
serial = mos7840_get_usb_serial(port, __func__);
|
|
if (!serial) {
|
|
dbg("%s", "Serial Paranoia failed");
|
|
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(tty, mos7840_port);
|
|
|
|
if (break_state == -1)
|
|
data = mos7840_port->shadowLCR | LCR_SET_BREAK;
|
|
else
|
|
data = mos7840_port->shadowLCR & ~LCR_SET_BREAK;
|
|
|
|
/* FIXME: no locking on shadowLCR anywhere in driver */
|
|
mos7840_port->shadowLCR = data;
|
|
dbg("mcs7840_break mos7840_port->shadowLCR is %x",
|
|
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 tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
int i;
|
|
int room = 0;
|
|
unsigned long flags;
|
|
struct moschip_port *mos7840_port;
|
|
|
|
dbg("%s", " mos7840_write_room:entering ...........");
|
|
|
|
if (mos7840_port_paranoia_check(port, __func__)) {
|
|
dbg("%s", "Invalid port");
|
|
dbg("%s", " mos7840_write_room:leaving ...........");
|
|
return -1;
|
|
}
|
|
|
|
mos7840_port = mos7840_get_port_private(port);
|
|
if (mos7840_port == NULL) {
|
|
dbg("%s", "mos7840_break:leaving ...........");
|
|
return -1;
|
|
}
|
|
|
|
spin_lock_irqsave(&mos7840_port->pool_lock, flags);
|
|
for (i = 0; i < NUM_URBS; ++i) {
|
|
if (!mos7840_port->busy[i])
|
|
room += URB_TRANSFER_BUFFER_SIZE;
|
|
}
|
|
spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
|
|
|
|
room = (room == 0) ? 0 : room - URB_TRANSFER_BUFFER_SIZE + 1;
|
|
dbg("%s - returns %d", __func__, 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 tty_struct *tty, struct usb_serial_port *port,
|
|
const unsigned char *data, int count)
|
|
{
|
|
int status;
|
|
int i;
|
|
int bytes_sent = 0;
|
|
int transfer_size;
|
|
unsigned long flags;
|
|
|
|
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", "entering ...........");
|
|
/* dbg("mos7840_write: mos7840_port->shadowLCR is %x",
|
|
mos7840_port->shadowLCR); */
|
|
|
|
#ifdef NOTMOS7840
|
|
Data = 0x00;
|
|
status = mos7840_get_uart_reg(port, LINE_CONTROL_REGISTER, &Data);
|
|
mos7840_port->shadowLCR = Data;
|
|
dbg("mos7840_write: LINE_CONTROL_REGISTER is %x", Data);
|
|
dbg("mos7840_write: mos7840_port->shadowLCR is %x",
|
|
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 = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
|
|
|
|
/* Data = 0x0c; */
|
|
/* status = mos7840_set_uart_reg(port,DIVISOR_LATCH_LSB,Data); */
|
|
Data = 0x00;
|
|
status = mos7840_get_uart_reg(port, DIVISOR_LATCH_LSB, &Data);
|
|
dbg("mos7840_write:DLL value is %x", Data);
|
|
|
|
Data = 0x0;
|
|
status = mos7840_get_uart_reg(port, DIVISOR_LATCH_MSB, &Data);
|
|
dbg("mos7840_write:DLM value is %x", Data);
|
|
|
|
Data = Data & ~SERIAL_LCR_DLAB;
|
|
dbg("mos7840_write: mos7840_port->shadowLCR is %x",
|
|
mos7840_port->shadowLCR);
|
|
status = mos7840_set_uart_reg(port, LINE_CONTROL_REGISTER, Data);
|
|
#endif
|
|
|
|
if (mos7840_port_paranoia_check(port, __func__)) {
|
|
dbg("%s", "Port Paranoia failed");
|
|
return -1;
|
|
}
|
|
|
|
serial = port->serial;
|
|
if (mos7840_serial_paranoia_check(serial, __func__)) {
|
|
dbg("%s", "Serial Paranoia failed");
|
|
return -1;
|
|
}
|
|
|
|
mos7840_port = mos7840_get_port_private(port);
|
|
if (mos7840_port == NULL) {
|
|
dbg("%s", "mos7840_port is NULL");
|
|
return -1;
|
|
}
|
|
|
|
/* try to find a free urb in the list */
|
|
urb = NULL;
|
|
|
|
spin_lock_irqsave(&mos7840_port->pool_lock, flags);
|
|
for (i = 0; i < NUM_URBS; ++i) {
|
|
if (!mos7840_port->busy[i]) {
|
|
mos7840_port->busy[i] = 1;
|
|
urb = mos7840_port->write_urb_pool[i];
|
|
dbg("URB:%d", i);
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
|
|
|
|
if (urb == NULL) {
|
|
dbg("%s - no more free urbs", __func__);
|
|
goto exit;
|
|
}
|
|
|
|
if (urb->transfer_buffer == NULL) {
|
|
urb->transfer_buffer =
|
|
kmalloc(URB_TRANSFER_BUFFER_SIZE, GFP_KERNEL);
|
|
|
|
if (urb->transfer_buffer == NULL) {
|
|
dev_err(&port->dev, "%s no more kernel memory...\n",
|
|
__func__);
|
|
goto exit;
|
|
}
|
|
}
|
|
transfer_size = min(count, URB_TRANSFER_BUFFER_SIZE);
|
|
|
|
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("bulkout endpoint is %d", port->bulk_out_endpointAddress);
|
|
|
|
/* send it down the pipe */
|
|
status = usb_submit_urb(urb, GFP_ATOMIC);
|
|
|
|
if (status) {
|
|
mos7840_port->busy[i] = 0;
|
|
dev_err(&port->dev, "%s - usb_submit_urb(write bulk) failed "
|
|
"with status = %d\n", __func__, status);
|
|
bytes_sent = status;
|
|
goto exit;
|
|
}
|
|
bytes_sent = transfer_size;
|
|
mos7840_port->icount.tx += transfer_size;
|
|
smp_wmb();
|
|
dbg("mos7840_port->icount.tx is %d:", 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 tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct moschip_port *mos7840_port;
|
|
int status;
|
|
|
|
if (mos7840_port_paranoia_check(port, __func__)) {
|
|
dbg("%s", "Invalid port");
|
|
return;
|
|
}
|
|
|
|
dbg("- port %d", port->number);
|
|
|
|
mos7840_port = mos7840_get_port_private(port);
|
|
|
|
if (mos7840_port == NULL)
|
|
return;
|
|
|
|
if (!mos7840_port->open) {
|
|
dbg("%s", "port not opened");
|
|
return;
|
|
}
|
|
|
|
dbg("%s", "Entering ..........");
|
|
|
|
/* if we are implementing XON/XOFF, send the stop character */
|
|
if (I_IXOFF(tty)) {
|
|
unsigned char stop_char = STOP_CHAR(tty);
|
|
status = mos7840_write(tty, 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 = 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 mos7840_throttle is
|
|
* called)
|
|
*****************************************************************************/
|
|
static void mos7840_unthrottle(struct tty_struct *tty)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
int status;
|
|
struct moschip_port *mos7840_port = mos7840_get_port_private(port);
|
|
|
|
if (mos7840_port_paranoia_check(port, __func__)) {
|
|
dbg("%s", "Invalid port");
|
|
return;
|
|
}
|
|
|
|
if (mos7840_port == NULL)
|
|
return;
|
|
|
|
if (!mos7840_port->open) {
|
|
dbg("%s - port not opened", __func__);
|
|
return;
|
|
}
|
|
|
|
dbg("%s", "Entering ..........");
|
|
|
|
/* if we are implementing XON/XOFF, send the start character */
|
|
if (I_IXOFF(tty)) {
|
|
unsigned char start_char = START_CHAR(tty);
|
|
status = mos7840_write(tty, 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 = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER,
|
|
mos7840_port->shadowMCR);
|
|
if (status < 0)
|
|
return;
|
|
}
|
|
}
|
|
|
|
static int mos7840_tiocmget(struct tty_struct *tty, struct file *file)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct moschip_port *mos7840_port;
|
|
unsigned int result;
|
|
__u16 msr;
|
|
__u16 mcr;
|
|
int status;
|
|
mos7840_port = mos7840_get_port_private(port);
|
|
|
|
dbg("%s - port %d", __func__, 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", __func__, result);
|
|
|
|
return result;
|
|
}
|
|
|
|
static int mos7840_tiocmset(struct tty_struct *tty, struct file *file,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
struct moschip_port *mos7840_port;
|
|
unsigned int mcr;
|
|
int status;
|
|
|
|
dbg("%s - port %d", __func__, port->number);
|
|
|
|
mos7840_port = mos7840_get_port_private(port);
|
|
|
|
if (mos7840_port == NULL)
|
|
return -ENODEV;
|
|
|
|
/* FIXME: What locks the port registers ? */
|
|
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 = mos7840_set_uart_reg(port, MODEM_CONTROL_REGISTER, mcr);
|
|
if (status < 0) {
|
|
dbg("setting MODEM_CONTROL_REGISTER Failed");
|
|
return status;
|
|
}
|
|
|
|
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", __func__, 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", baudrate, custom);
|
|
return 0;
|
|
}
|
|
|
|
dbg("%s", " 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, __func__)) {
|
|
dbg("%s", "Invalid port");
|
|
return -1;
|
|
}
|
|
|
|
if (mos7840_serial_paranoia_check(port->serial, __func__)) {
|
|
dbg("%s", "Invalid Serial");
|
|
return -1;
|
|
}
|
|
|
|
dbg("%s", "Entering ..........");
|
|
|
|
number = mos7840_port->port->number - mos7840_port->port->serial->minor;
|
|
|
|
dbg("%s - port = %d, baud = %d", __func__,
|
|
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 */
|
|
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");
|
|
return -1;
|
|
}
|
|
#endif
|
|
|
|
} else {
|
|
#ifdef HW_flow_control
|
|
/ *setting h/w flow control bit to 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");
|
|
return -1;
|
|
}
|
|
#endif
|
|
|
|
}
|
|
|
|
if (1) { /* baudRate <= 115200) */
|
|
clk_sel_val = 0x0;
|
|
Data = 0x0;
|
|
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");
|
|
return -1;
|
|
}
|
|
Data = (Data & 0x8f) | clk_sel_val;
|
|
status = mos7840_set_reg_sync(port, mos7840_port->SpRegOffset,
|
|
Data);
|
|
if (status < 0) {
|
|
dbg("Writing spreg failed in set_serial_baud");
|
|
return -1;
|
|
}
|
|
/* Calculate the Divisor */
|
|
|
|
if (status) {
|
|
dev_err(&port->dev, "%s - bad baud rate\n", __func__);
|
|
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", 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", 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 tty_struct *tty,
|
|
struct moschip_port *mos7840_port, struct ktermios *old_termios)
|
|
{
|
|
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, __func__)) {
|
|
dbg("%s", "Invalid port");
|
|
return;
|
|
}
|
|
|
|
if (mos7840_serial_paranoia_check(port->serial, __func__)) {
|
|
dbg("%s", "Invalid Serial");
|
|
return;
|
|
}
|
|
|
|
serial = port->serial;
|
|
|
|
dbg("%s - port %d", __func__, mos7840_port->port->number);
|
|
|
|
if (!mos7840_port->open) {
|
|
dbg("%s - port not opened", __func__);
|
|
return;
|
|
}
|
|
|
|
dbg("%s", "Entering ..........");
|
|
|
|
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", __func__);
|
|
} else {
|
|
lParity = LCR_PAR_EVEN;
|
|
dbg("%s - parity = even", __func__);
|
|
}
|
|
|
|
} else {
|
|
dbg("%s - parity = none", __func__);
|
|
}
|
|
|
|
if (cflag & CMSPAR)
|
|
lParity = lParity | 0x20;
|
|
|
|
/* Change the Stop bit */
|
|
if (cflag & CSTOPB) {
|
|
lStop = LCR_STOP_2;
|
|
dbg("%s - stop bits = 2", __func__);
|
|
} else {
|
|
lStop = LCR_STOP_1;
|
|
dbg("%s - stop bits = 1", __func__);
|
|
}
|
|
|
|
/* 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",
|
|
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", "Picked default baud...");
|
|
baud = 9600;
|
|
}
|
|
|
|
dbg("%s - baud rate = %d", __func__, 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_busy == false) {
|
|
mos7840_port->read_urb->dev = serial->dev;
|
|
mos7840_port->read_urb_busy = true;
|
|
status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
|
|
if (status) {
|
|
dbg("usb_submit_urb(read bulk) failed, status = %d",
|
|
status);
|
|
mos7840_port->read_urb_busy = false;
|
|
}
|
|
}
|
|
wake_up(&mos7840_port->delta_msr_wait);
|
|
mos7840_port->delta_msr_cond = 1;
|
|
dbg("mos7840_change_port_settings mos7840_port->shadowLCR is End %x",
|
|
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 tty_struct *tty,
|
|
struct usb_serial_port *port,
|
|
struct ktermios *old_termios)
|
|
{
|
|
int status;
|
|
unsigned int cflag;
|
|
struct usb_serial *serial;
|
|
struct moschip_port *mos7840_port;
|
|
dbg("mos7840_set_termios: START");
|
|
if (mos7840_port_paranoia_check(port, __func__)) {
|
|
dbg("%s", "Invalid port");
|
|
return;
|
|
}
|
|
|
|
serial = port->serial;
|
|
|
|
if (mos7840_serial_paranoia_check(serial, __func__)) {
|
|
dbg("%s", "Invalid Serial");
|
|
return;
|
|
}
|
|
|
|
mos7840_port = mos7840_get_port_private(port);
|
|
|
|
if (mos7840_port == NULL)
|
|
return;
|
|
|
|
if (!mos7840_port->open) {
|
|
dbg("%s - port not opened", __func__);
|
|
return;
|
|
}
|
|
|
|
dbg("%s", "setting termios - ");
|
|
|
|
cflag = tty->termios->c_cflag;
|
|
|
|
dbg("%s - clfag %08x iflag %08x", __func__,
|
|
tty->termios->c_cflag, RELEVANT_IFLAG(tty->termios->c_iflag));
|
|
dbg("%s - old clfag %08x old iflag %08x", __func__,
|
|
old_termios->c_cflag, RELEVANT_IFLAG(old_termios->c_iflag));
|
|
dbg("%s - port %d", __func__, port->number);
|
|
|
|
/* change the port settings to the new ones specified */
|
|
|
|
mos7840_change_port_settings(tty, mos7840_port, old_termios);
|
|
|
|
if (!mos7840_port->read_urb) {
|
|
dbg("%s", "URB KILLED !!!!!");
|
|
return;
|
|
}
|
|
|
|
if (mos7840_port->read_urb_busy == false) {
|
|
mos7840_port->read_urb->dev = serial->dev;
|
|
mos7840_port->read_urb_busy = true;
|
|
status = usb_submit_urb(mos7840_port->read_urb, GFP_ATOMIC);
|
|
if (status) {
|
|
dbg("usb_submit_urb(read bulk) failed, status = %d",
|
|
status);
|
|
mos7840_port->read_urb_busy = false;
|
|
}
|
|
}
|
|
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 tty_struct *tty,
|
|
unsigned int __user *value)
|
|
{
|
|
int count;
|
|
unsigned int result = 0;
|
|
|
|
count = mos7840_chars_in_buffer(tty);
|
|
if (count == 0) {
|
|
dbg("%s -- Empty", __func__);
|
|
result = TIOCSER_TEMT;
|
|
}
|
|
|
|
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 __user *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 tty_struct *tty, struct file *file,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct usb_serial_port *port = tty->driver_data;
|
|
void __user *argp = (void __user *)arg;
|
|
struct moschip_port *mos7840_port;
|
|
|
|
struct async_icount cnow;
|
|
struct async_icount cprev;
|
|
struct serial_icounter_struct icount;
|
|
|
|
if (mos7840_port_paranoia_check(port, __func__)) {
|
|
dbg("%s", "Invalid port");
|
|
return -1;
|
|
}
|
|
|
|
mos7840_port = mos7840_get_port_private(port);
|
|
|
|
if (mos7840_port == NULL)
|
|
return -1;
|
|
|
|
dbg("%s - port %d, cmd = 0x%x", __func__, port->number, cmd);
|
|
|
|
switch (cmd) {
|
|
/* return number of bytes available */
|
|
|
|
case TIOCSERGETLSR:
|
|
dbg("%s (%d) TIOCSERGETLSR", __func__, port->number);
|
|
return mos7840_get_lsr_info(tty, argp);
|
|
return 0;
|
|
|
|
case TIOCGSERIAL:
|
|
dbg("%s (%d) TIOCGSERIAL", __func__, port->number);
|
|
return mos7840_get_serial_info(mos7840_port, argp);
|
|
|
|
case TIOCSSERIAL:
|
|
dbg("%s (%d) TIOCSSERIAL", __func__, port->number);
|
|
break;
|
|
|
|
case TIOCMIWAIT:
|
|
dbg("%s (%d) TIOCMIWAIT", __func__, 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;
|
|
smp_rmb();
|
|
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;
|
|
smp_rmb();
|
|
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", __func__,
|
|
port->number, icount.rx, icount.tx);
|
|
if (copy_to_user(argp, &icount, sizeof(icount)))
|
|
return -EFAULT;
|
|
return 0;
|
|
default:
|
|
break;
|
|
}
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
|
|
static int mos7840_calc_num_ports(struct usb_serial *serial)
|
|
{
|
|
int mos7840_num_ports = 0;
|
|
|
|
dbg("numberofendpoints: cur %d, alt %d",
|
|
(int)serial->interface->cur_altsetting->desc.bNumEndpoints,
|
|
(int)serial->interface->altsetting->desc.bNumEndpoints);
|
|
if (serial->interface->cur_altsetting->desc.bNumEndpoints == 5) {
|
|
mos7840_num_ports = serial->num_ports = 2;
|
|
} else if (serial->interface->cur_altsetting->desc.bNumEndpoints == 9) {
|
|
serial->num_bulk_in = 4;
|
|
serial->num_bulk_out = 4;
|
|
mos7840_num_ports = serial->num_ports = 4;
|
|
}
|
|
dbg ("mos7840_num_ports = %d", mos7840_num_ports);
|
|
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", "mos7840_startup :Entering..........");
|
|
|
|
if (!serial) {
|
|
dbg("%s", "Invalid Handler");
|
|
return -1;
|
|
}
|
|
|
|
dev = serial->dev;
|
|
|
|
dbg("%s", "Entering...");
|
|
dbg ("mos7840_startup: serial = %p", serial);
|
|
|
|
/* 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) {
|
|
dbg ("mos7840_startup: configuring port %d............", i);
|
|
mos7840_port = kzalloc(sizeof(struct moschip_port), GFP_KERNEL);
|
|
if (mos7840_port == NULL) {
|
|
dev_err(&dev->dev, "%s - Out of memory\n", __func__);
|
|
status = -ENOMEM;
|
|
i--; /* don't follow NULL pointer cleaning up */
|
|
goto error;
|
|
}
|
|
|
|
/* Initialize all port interrupt end point to port 0 int
|
|
* endpoint. Our device has only one interrupt end point
|
|
* common to all port */
|
|
|
|
mos7840_port->port = serial->port[i];
|
|
mos7840_set_port_private(serial->port[i], mos7840_port);
|
|
spin_lock_init(&mos7840_port->pool_lock);
|
|
|
|
/* minor is not initialised until later by
|
|
* usb-serial.c:get_free_serial() and cannot therefore be used
|
|
* to index device instances */
|
|
mos7840_port->port_num = i + 1;
|
|
dbg ("serial->port[i]->number = %d", serial->port[i]->number);
|
|
dbg ("serial->port[i]->serial->minor = %d", serial->port[i]->serial->minor);
|
|
dbg ("mos7840_port->port_num = %d", mos7840_port->port_num);
|
|
dbg ("serial->minor = %d", serial->minor);
|
|
|
|
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)
|
|
&& (serial->num_ports == 4)) {
|
|
mos7840_port->SpRegOffset = 0x8;
|
|
mos7840_port->ControlRegOffset = 0x9;
|
|
mos7840_port->DcrRegOffset = 0x16;
|
|
} else if ((mos7840_port->port_num == 2)
|
|
&& (serial->num_ports == 2)) {
|
|
mos7840_port->SpRegOffset = 0xa;
|
|
mos7840_port->ControlRegOffset = 0xb;
|
|
mos7840_port->DcrRegOffset = 0x19;
|
|
} else if ((mos7840_port->port_num == 3)
|
|
&& (serial->num_ports == 4)) {
|
|
mos7840_port->SpRegOffset = 0xa;
|
|
mos7840_port->ControlRegOffset = 0xb;
|
|
mos7840_port->DcrRegOffset = 0x19;
|
|
} else if ((mos7840_port->port_num == 4)
|
|
&& (serial->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", status);
|
|
break;
|
|
} else
|
|
dbg("ControlReg Reading success val is %x, status%d",
|
|
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 = mos7840_set_reg_sync(serial->port[i],
|
|
mos7840_port->ControlRegOffset, Data);
|
|
if (status < 0) {
|
|
dbg("Writing ControlReg failed(rx_disable) status-0x%x", status);
|
|
break;
|
|
} else
|
|
dbg("ControlReg Writing success(rx_disable) status%d",
|
|
status);
|
|
|
|
/* Write default values in DCR (i.e 0x01 in DCR0, 0x05 in DCR2
|
|
and 0x24 in DCR3 */
|
|
Data = 0x01;
|
|
status = mos7840_set_reg_sync(serial->port[i],
|
|
(__u16) (mos7840_port->DcrRegOffset + 0), Data);
|
|
if (status < 0) {
|
|
dbg("Writing DCR0 failed status-0x%x", status);
|
|
break;
|
|
} else
|
|
dbg("DCR0 Writing success status%d", status);
|
|
|
|
Data = 0x05;
|
|
status = mos7840_set_reg_sync(serial->port[i],
|
|
(__u16) (mos7840_port->DcrRegOffset + 1), Data);
|
|
if (status < 0) {
|
|
dbg("Writing DCR1 failed status-0x%x", status);
|
|
break;
|
|
} else
|
|
dbg("DCR1 Writing success status%d", status);
|
|
|
|
Data = 0x24;
|
|
status = mos7840_set_reg_sync(serial->port[i],
|
|
(__u16) (mos7840_port->DcrRegOffset + 2), Data);
|
|
if (status < 0) {
|
|
dbg("Writing DCR2 failed status-0x%x", status);
|
|
break;
|
|
} else
|
|
dbg("DCR2 Writing success status%d", status);
|
|
|
|
/* write values in clkstart0x0 and clkmulti 0x20 */
|
|
Data = 0x0;
|
|
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", status);
|
|
break;
|
|
} else
|
|
dbg("CLK_START_VALUE_REGISTER Writing success status%d", status);
|
|
|
|
Data = 0x20;
|
|
status = mos7840_set_reg_sync(serial->port[i],
|
|
CLK_MULTI_REGISTER, Data);
|
|
if (status < 0) {
|
|
dbg("Writing CLK_MULTI_REGISTER failed status-0x%x",
|
|
status);
|
|
goto error;
|
|
} else
|
|
dbg("CLK_MULTI_REGISTER Writing success status%d",
|
|
status);
|
|
|
|
/* write value 0x0 to scratchpad register */
|
|
Data = 0x00;
|
|
status = mos7840_set_uart_reg(serial->port[i],
|
|
SCRATCH_PAD_REGISTER, Data);
|
|
if (status < 0) {
|
|
dbg("Writing SCRATCH_PAD_REGISTER failed status-0x%x",
|
|
status);
|
|
break;
|
|
} else
|
|
dbg("SCRATCH_PAD_REGISTER Writing success status%d",
|
|
status);
|
|
|
|
/* Zero Length flag register */
|
|
if ((mos7840_port->port_num != 1)
|
|
&& (serial->num_ports == 2)) {
|
|
|
|
Data = 0xff;
|
|
status = mos7840_set_reg_sync(serial->port[i],
|
|
(__u16) (ZLP_REG1 +
|
|
((__u16)mos7840_port->port_num)), Data);
|
|
dbg("ZLIP offset %x",
|
|
(__u16) (ZLP_REG1 +
|
|
((__u16) mos7840_port->port_num)));
|
|
if (status < 0) {
|
|
dbg("Writing ZLP_REG%d failed status-0x%x",
|
|
i + 2, status);
|
|
break;
|
|
} else
|
|
dbg("ZLP_REG%d Writing success status%d",
|
|
i + 2, status);
|
|
} else {
|
|
Data = 0xff;
|
|
status = mos7840_set_reg_sync(serial->port[i],
|
|
(__u16) (ZLP_REG1 +
|
|
((__u16)mos7840_port->port_num) - 0x1), Data);
|
|
dbg("ZLIP offset %x",
|
|
(__u16) (ZLP_REG1 +
|
|
((__u16) mos7840_port->port_num) - 0x1));
|
|
if (status < 0) {
|
|
dbg("Writing ZLP_REG%d failed status-0x%x",
|
|
i + 1, status);
|
|
break;
|
|
} else
|
|
dbg("ZLP_REG%d Writing success status%d",
|
|
i + 1, status);
|
|
|
|
}
|
|
mos7840_port->control_urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
mos7840_port->ctrl_buf = kmalloc(16, GFP_KERNEL);
|
|
mos7840_port->dr = kmalloc(sizeof(struct usb_ctrlrequest),
|
|
GFP_KERNEL);
|
|
if (!mos7840_port->control_urb || !mos7840_port->ctrl_buf ||
|
|
!mos7840_port->dr) {
|
|
status = -ENOMEM;
|
|
goto error;
|
|
}
|
|
}
|
|
dbg ("mos7840_startup: all ports configured...........");
|
|
|
|
/* Zero Length flag enable */
|
|
Data = 0x0f;
|
|
status = mos7840_set_reg_sync(serial->port[0], ZLP_REG5, Data);
|
|
if (status < 0) {
|
|
dbg("Writing ZLP_REG5 failed status-0x%x", status);
|
|
goto error;
|
|
} else
|
|
dbg("ZLP_REG5 Writing success status%d", status);
|
|
|
|
/* setting configuration feature to one */
|
|
usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
|
|
(__u8) 0x03, 0x00, 0x01, 0x00, NULL, 0x00, 5 * HZ);
|
|
return 0;
|
|
error:
|
|
for (/* nothing */; i >= 0; i--) {
|
|
mos7840_port = mos7840_get_port_private(serial->port[i]);
|
|
|
|
kfree(mos7840_port->dr);
|
|
kfree(mos7840_port->ctrl_buf);
|
|
usb_free_urb(mos7840_port->control_urb);
|
|
kfree(mos7840_port);
|
|
serial->port[i] = NULL;
|
|
}
|
|
return status;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* mos7840_disconnect
|
|
* This function is called whenever the device is removed from the usb bus.
|
|
****************************************************************************/
|
|
|
|
static void mos7840_disconnect(struct usb_serial *serial)
|
|
{
|
|
int i;
|
|
unsigned long flags;
|
|
struct moschip_port *mos7840_port;
|
|
dbg("%s", " disconnect :entering..........");
|
|
|
|
if (!serial) {
|
|
dbg("%s", "Invalid Handler");
|
|
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]);
|
|
dbg ("mos7840_port %d = %p", i, mos7840_port);
|
|
if (mos7840_port) {
|
|
spin_lock_irqsave(&mos7840_port->pool_lock, flags);
|
|
mos7840_port->zombie = 1;
|
|
spin_unlock_irqrestore(&mos7840_port->pool_lock, flags);
|
|
usb_kill_urb(mos7840_port->control_urb);
|
|
}
|
|
}
|
|
|
|
dbg("%s", "Thank u :: ");
|
|
|
|
}
|
|
|
|
/****************************************************************************
|
|
* mos7840_release
|
|
* This function is called when the usb_serial structure is freed.
|
|
****************************************************************************/
|
|
|
|
static void mos7840_release(struct usb_serial *serial)
|
|
{
|
|
int i;
|
|
struct moschip_port *mos7840_port;
|
|
dbg("%s", " release :entering..........");
|
|
|
|
if (!serial) {
|
|
dbg("%s", "Invalid Handler");
|
|
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]);
|
|
dbg("mos7840_port %d = %p", i, mos7840_port);
|
|
if (mos7840_port) {
|
|
kfree(mos7840_port->ctrl_buf);
|
|
kfree(mos7840_port->dr);
|
|
kfree(mos7840_port);
|
|
}
|
|
}
|
|
|
|
dbg("%s", "Thank u :: ");
|
|
|
|
}
|
|
|
|
static struct usb_driver io_driver = {
|
|
.name = "mos7840",
|
|
.probe = usb_serial_probe,
|
|
.disconnect = usb_serial_disconnect,
|
|
.id_table = moschip_id_table_combined,
|
|
.no_dynamic_id = 1,
|
|
};
|
|
|
|
static struct usb_serial_driver moschip7840_4port_device = {
|
|
.driver = {
|
|
.owner = THIS_MODULE,
|
|
.name = "mos7840",
|
|
},
|
|
.description = DRIVER_DESC,
|
|
.usb_driver = &io_driver,
|
|
.id_table = moschip_port_id_table,
|
|
.num_ports = 4,
|
|
.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,
|
|
.disconnect = mos7840_disconnect,
|
|
.release = mos7840_release,
|
|
.read_bulk_callback = mos7840_bulk_in_callback,
|
|
.read_int_callback = mos7840_interrupt_callback,
|
|
};
|
|
|
|
/****************************************************************************
|
|
* 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", " mos7840_init :entering..........");
|
|
|
|
/* Register with the usb serial */
|
|
retval = usb_serial_register(&moschip7840_4port_device);
|
|
|
|
if (retval)
|
|
goto failed_port_device_register;
|
|
|
|
dbg("%s", "Entering...");
|
|
printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
|
|
DRIVER_DESC "\n");
|
|
|
|
/* Register with the usb */
|
|
retval = usb_register(&io_driver);
|
|
if (retval == 0) {
|
|
dbg("%s", "Leaving...");
|
|
return 0;
|
|
}
|
|
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", " mos7840_exit :entering..........");
|
|
|
|
usb_deregister(&io_driver);
|
|
|
|
usb_serial_deregister(&moschip7840_4port_device);
|
|
|
|
dbg("%s", "Entering...");
|
|
}
|
|
|
|
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");
|