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e0525393ba
The prefix suggests the number should be printed in hex, so use the %x specifier to do that. Found by using regex suggested by Joe Perches. Signed-off-by: Hans Wennborg <hans@hanshq.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2098 lines
52 KiB
C
2098 lines
52 KiB
C
/*****************************************************************************/
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/*
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* moxa.c -- MOXA Intellio family multiport serial driver.
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*
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* Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com).
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* Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
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*
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* This code is loosely based on the Linux serial driver, written by
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* Linus Torvalds, Theodore T'so and others.
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*
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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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/*
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* MOXA Intellio Series Driver
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* for : LINUX
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* date : 1999/1/7
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* version : 5.1
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/mm.h>
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#include <linux/ioport.h>
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#include <linux/errno.h>
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#include <linux/firmware.h>
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#include <linux/signal.h>
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#include <linux/sched.h>
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#include <linux/timer.h>
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#include <linux/interrupt.h>
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#include <linux/tty.h>
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#include <linux/tty_flip.h>
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#include <linux/major.h>
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#include <linux/string.h>
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#include <linux/fcntl.h>
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#include <linux/ptrace.h>
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#include <linux/serial.h>
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#include <linux/tty_driver.h>
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#include <linux/delay.h>
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#include <linux/pci.h>
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#include <linux/init.h>
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#include <linux/bitops.h>
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#include <linux/slab.h>
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#include <linux/ratelimit.h>
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#include <asm/io.h>
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#include <asm/uaccess.h>
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#include "moxa.h"
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#define MOXA_VERSION "6.0k"
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#define MOXA_FW_HDRLEN 32
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#define MOXAMAJOR 172
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#define MAX_BOARDS 4 /* Don't change this value */
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#define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
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#define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
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#define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
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(brd)->boardType == MOXA_BOARD_C320_PCI)
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/*
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* Define the Moxa PCI vendor and device IDs.
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*/
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#define MOXA_BUS_TYPE_ISA 0
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#define MOXA_BUS_TYPE_PCI 1
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enum {
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MOXA_BOARD_C218_PCI = 1,
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MOXA_BOARD_C218_ISA,
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MOXA_BOARD_C320_PCI,
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MOXA_BOARD_C320_ISA,
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MOXA_BOARD_CP204J,
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};
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static char *moxa_brdname[] =
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{
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"C218 Turbo PCI series",
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"C218 Turbo ISA series",
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"C320 Turbo PCI series",
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"C320 Turbo ISA series",
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"CP-204J series",
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};
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#ifdef CONFIG_PCI
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static struct pci_device_id moxa_pcibrds[] = {
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{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
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.driver_data = MOXA_BOARD_C218_PCI },
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{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
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.driver_data = MOXA_BOARD_C320_PCI },
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{ PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
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.driver_data = MOXA_BOARD_CP204J },
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{ 0 }
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};
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MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
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#endif /* CONFIG_PCI */
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struct moxa_port;
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static struct moxa_board_conf {
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int boardType;
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int numPorts;
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int busType;
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unsigned int ready;
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struct moxa_port *ports;
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void __iomem *basemem;
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void __iomem *intNdx;
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void __iomem *intPend;
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void __iomem *intTable;
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} moxa_boards[MAX_BOARDS];
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struct mxser_mstatus {
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tcflag_t cflag;
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int cts;
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int dsr;
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int ri;
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int dcd;
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};
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struct moxaq_str {
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int inq;
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int outq;
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};
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struct moxa_port {
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struct tty_port port;
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struct moxa_board_conf *board;
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void __iomem *tableAddr;
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int type;
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int cflag;
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unsigned long statusflags;
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u8 DCDState; /* Protected by the port lock */
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u8 lineCtrl;
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u8 lowChkFlag;
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};
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struct mon_str {
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int tick;
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int rxcnt[MAX_PORTS];
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int txcnt[MAX_PORTS];
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};
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/* statusflags */
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#define TXSTOPPED 1
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#define LOWWAIT 2
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#define EMPTYWAIT 3
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#define SERIAL_DO_RESTART
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#define WAKEUP_CHARS 256
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static int ttymajor = MOXAMAJOR;
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static struct mon_str moxaLog;
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static unsigned int moxaFuncTout = HZ / 2;
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static unsigned int moxaLowWaterChk;
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static DEFINE_MUTEX(moxa_openlock);
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static DEFINE_SPINLOCK(moxa_lock);
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static unsigned long baseaddr[MAX_BOARDS];
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static unsigned int type[MAX_BOARDS];
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static unsigned int numports[MAX_BOARDS];
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static struct tty_port moxa_service_port;
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MODULE_AUTHOR("William Chen");
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MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
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MODULE_LICENSE("GPL");
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MODULE_FIRMWARE("c218tunx.cod");
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MODULE_FIRMWARE("cp204unx.cod");
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MODULE_FIRMWARE("c320tunx.cod");
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module_param_array(type, uint, NULL, 0);
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MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
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module_param_array(baseaddr, ulong, NULL, 0);
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MODULE_PARM_DESC(baseaddr, "base address");
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module_param_array(numports, uint, NULL, 0);
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MODULE_PARM_DESC(numports, "numports (ignored for C218)");
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module_param(ttymajor, int, 0);
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/*
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* static functions:
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*/
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static int moxa_open(struct tty_struct *, struct file *);
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static void moxa_close(struct tty_struct *, struct file *);
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static int moxa_write(struct tty_struct *, const unsigned char *, int);
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static int moxa_write_room(struct tty_struct *);
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static void moxa_flush_buffer(struct tty_struct *);
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static int moxa_chars_in_buffer(struct tty_struct *);
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static void moxa_set_termios(struct tty_struct *, struct ktermios *);
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static void moxa_stop(struct tty_struct *);
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static void moxa_start(struct tty_struct *);
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static void moxa_hangup(struct tty_struct *);
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static int moxa_tiocmget(struct tty_struct *tty);
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static int moxa_tiocmset(struct tty_struct *tty,
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unsigned int set, unsigned int clear);
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static void moxa_poll(unsigned long);
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static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
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static void moxa_shutdown(struct tty_port *);
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static int moxa_carrier_raised(struct tty_port *);
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static void moxa_dtr_rts(struct tty_port *, int);
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/*
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* moxa board interface functions:
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*/
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static void MoxaPortEnable(struct moxa_port *);
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static void MoxaPortDisable(struct moxa_port *);
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static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
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static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
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static void MoxaPortLineCtrl(struct moxa_port *, int, int);
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static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
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static int MoxaPortLineStatus(struct moxa_port *);
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static void MoxaPortFlushData(struct moxa_port *, int);
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static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int);
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static int MoxaPortReadData(struct moxa_port *);
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static int MoxaPortTxQueue(struct moxa_port *);
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static int MoxaPortRxQueue(struct moxa_port *);
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static int MoxaPortTxFree(struct moxa_port *);
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static void MoxaPortTxDisable(struct moxa_port *);
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static void MoxaPortTxEnable(struct moxa_port *);
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static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
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static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
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static void MoxaSetFifo(struct moxa_port *port, int enable);
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/*
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* I/O functions
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*/
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static DEFINE_SPINLOCK(moxafunc_lock);
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static void moxa_wait_finish(void __iomem *ofsAddr)
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{
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unsigned long end = jiffies + moxaFuncTout;
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while (readw(ofsAddr + FuncCode) != 0)
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if (time_after(jiffies, end))
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return;
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if (readw(ofsAddr + FuncCode) != 0)
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printk_ratelimited(KERN_WARNING "moxa function expired\n");
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}
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static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
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{
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unsigned long flags;
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spin_lock_irqsave(&moxafunc_lock, flags);
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writew(arg, ofsAddr + FuncArg);
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writew(cmd, ofsAddr + FuncCode);
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moxa_wait_finish(ofsAddr);
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spin_unlock_irqrestore(&moxafunc_lock, flags);
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}
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static int moxafuncret(void __iomem *ofsAddr, u16 cmd, u16 arg)
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{
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unsigned long flags;
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u16 ret;
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spin_lock_irqsave(&moxafunc_lock, flags);
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writew(arg, ofsAddr + FuncArg);
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writew(cmd, ofsAddr + FuncCode);
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moxa_wait_finish(ofsAddr);
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ret = readw(ofsAddr + FuncArg);
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spin_unlock_irqrestore(&moxafunc_lock, flags);
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return ret;
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}
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static void moxa_low_water_check(void __iomem *ofsAddr)
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{
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u16 rptr, wptr, mask, len;
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if (readb(ofsAddr + FlagStat) & Xoff_state) {
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rptr = readw(ofsAddr + RXrptr);
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wptr = readw(ofsAddr + RXwptr);
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mask = readw(ofsAddr + RX_mask);
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len = (wptr - rptr) & mask;
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if (len <= Low_water)
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moxafunc(ofsAddr, FC_SendXon, 0);
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}
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}
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/*
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* TTY operations
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*/
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static int moxa_ioctl(struct tty_struct *tty,
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unsigned int cmd, unsigned long arg)
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{
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struct moxa_port *ch = tty->driver_data;
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void __user *argp = (void __user *)arg;
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int status, ret = 0;
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if (tty->index == MAX_PORTS) {
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if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
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cmd != MOXA_GETMSTATUS)
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return -EINVAL;
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} else if (!ch)
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return -ENODEV;
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switch (cmd) {
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case MOXA_GETDATACOUNT:
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moxaLog.tick = jiffies;
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if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
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ret = -EFAULT;
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break;
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case MOXA_FLUSH_QUEUE:
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MoxaPortFlushData(ch, arg);
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break;
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case MOXA_GET_IOQUEUE: {
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struct moxaq_str __user *argm = argp;
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struct moxaq_str tmp;
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struct moxa_port *p;
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unsigned int i, j;
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for (i = 0; i < MAX_BOARDS; i++) {
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p = moxa_boards[i].ports;
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for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
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memset(&tmp, 0, sizeof(tmp));
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spin_lock_bh(&moxa_lock);
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if (moxa_boards[i].ready) {
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tmp.inq = MoxaPortRxQueue(p);
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tmp.outq = MoxaPortTxQueue(p);
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}
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spin_unlock_bh(&moxa_lock);
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if (copy_to_user(argm, &tmp, sizeof(tmp)))
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return -EFAULT;
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}
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}
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break;
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} case MOXA_GET_OQUEUE:
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status = MoxaPortTxQueue(ch);
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ret = put_user(status, (unsigned long __user *)argp);
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break;
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case MOXA_GET_IQUEUE:
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status = MoxaPortRxQueue(ch);
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ret = put_user(status, (unsigned long __user *)argp);
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break;
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case MOXA_GETMSTATUS: {
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struct mxser_mstatus __user *argm = argp;
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struct mxser_mstatus tmp;
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struct moxa_port *p;
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unsigned int i, j;
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for (i = 0; i < MAX_BOARDS; i++) {
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p = moxa_boards[i].ports;
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for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
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struct tty_struct *ttyp;
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memset(&tmp, 0, sizeof(tmp));
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spin_lock_bh(&moxa_lock);
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if (!moxa_boards[i].ready) {
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spin_unlock_bh(&moxa_lock);
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goto copy;
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}
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status = MoxaPortLineStatus(p);
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spin_unlock_bh(&moxa_lock);
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if (status & 1)
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tmp.cts = 1;
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if (status & 2)
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tmp.dsr = 1;
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if (status & 4)
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tmp.dcd = 1;
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ttyp = tty_port_tty_get(&p->port);
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if (!ttyp)
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tmp.cflag = p->cflag;
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else
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tmp.cflag = ttyp->termios.c_cflag;
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tty_kref_put(ttyp);
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copy:
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if (copy_to_user(argm, &tmp, sizeof(tmp)))
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return -EFAULT;
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}
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}
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break;
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}
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case TIOCGSERIAL:
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mutex_lock(&ch->port.mutex);
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ret = moxa_get_serial_info(ch, argp);
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mutex_unlock(&ch->port.mutex);
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break;
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case TIOCSSERIAL:
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mutex_lock(&ch->port.mutex);
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ret = moxa_set_serial_info(ch, argp);
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mutex_unlock(&ch->port.mutex);
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break;
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default:
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ret = -ENOIOCTLCMD;
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}
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return ret;
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}
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static int moxa_break_ctl(struct tty_struct *tty, int state)
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{
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struct moxa_port *port = tty->driver_data;
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moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
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Magic_code);
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return 0;
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}
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static const struct tty_operations moxa_ops = {
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.open = moxa_open,
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.close = moxa_close,
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.write = moxa_write,
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.write_room = moxa_write_room,
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.flush_buffer = moxa_flush_buffer,
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.chars_in_buffer = moxa_chars_in_buffer,
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.ioctl = moxa_ioctl,
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.set_termios = moxa_set_termios,
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.stop = moxa_stop,
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.start = moxa_start,
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.hangup = moxa_hangup,
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.break_ctl = moxa_break_ctl,
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.tiocmget = moxa_tiocmget,
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.tiocmset = moxa_tiocmset,
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};
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static const struct tty_port_operations moxa_port_ops = {
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.carrier_raised = moxa_carrier_raised,
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.dtr_rts = moxa_dtr_rts,
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.shutdown = moxa_shutdown,
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};
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static struct tty_driver *moxaDriver;
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static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
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|
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/*
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* HW init
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*/
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static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
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{
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switch (brd->boardType) {
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case MOXA_BOARD_C218_ISA:
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case MOXA_BOARD_C218_PCI:
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if (model != 1)
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goto err;
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break;
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case MOXA_BOARD_CP204J:
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if (model != 3)
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goto err;
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break;
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default:
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if (model != 2)
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goto err;
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break;
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}
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return 0;
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err:
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return -EINVAL;
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}
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|
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static int moxa_check_fw(const void *ptr)
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{
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const __le16 *lptr = ptr;
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if (*lptr != cpu_to_le16(0x7980))
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return -EINVAL;
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return 0;
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}
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|
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static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
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size_t len)
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{
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void __iomem *baseAddr = brd->basemem;
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u16 tmp;
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writeb(HW_reset, baseAddr + Control_reg); /* reset */
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msleep(10);
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memset_io(baseAddr, 0, 4096);
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memcpy_toio(baseAddr, buf, len); /* download BIOS */
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writeb(0, baseAddr + Control_reg); /* restart */
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|
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msleep(2000);
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|
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switch (brd->boardType) {
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case MOXA_BOARD_C218_ISA:
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case MOXA_BOARD_C218_PCI:
|
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tmp = readw(baseAddr + C218_key);
|
|
if (tmp != C218_KeyCode)
|
|
goto err;
|
|
break;
|
|
case MOXA_BOARD_CP204J:
|
|
tmp = readw(baseAddr + C218_key);
|
|
if (tmp != CP204J_KeyCode)
|
|
goto err;
|
|
break;
|
|
default:
|
|
tmp = readw(baseAddr + C320_key);
|
|
if (tmp != C320_KeyCode)
|
|
goto err;
|
|
tmp = readw(baseAddr + C320_status);
|
|
if (tmp != STS_init) {
|
|
printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
|
|
"module not found\n");
|
|
return -EIO;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
err:
|
|
printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
|
|
return -EIO;
|
|
}
|
|
|
|
static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
|
|
size_t len)
|
|
{
|
|
void __iomem *baseAddr = brd->basemem;
|
|
|
|
if (len < 7168) {
|
|
printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
writew(len - 7168 - 2, baseAddr + C320bapi_len);
|
|
writeb(1, baseAddr + Control_reg); /* Select Page 1 */
|
|
memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
|
|
writeb(2, baseAddr + Control_reg); /* Select Page 2 */
|
|
memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
|
|
size_t len)
|
|
{
|
|
void __iomem *baseAddr = brd->basemem;
|
|
const __le16 *uptr = ptr;
|
|
size_t wlen, len2, j;
|
|
unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
|
|
unsigned int i, retry;
|
|
u16 usum, keycode;
|
|
|
|
keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
|
|
C218_KeyCode;
|
|
|
|
switch (brd->boardType) {
|
|
case MOXA_BOARD_CP204J:
|
|
case MOXA_BOARD_C218_ISA:
|
|
case MOXA_BOARD_C218_PCI:
|
|
key = C218_key;
|
|
loadbuf = C218_LoadBuf;
|
|
loadlen = C218DLoad_len;
|
|
checksum = C218check_sum;
|
|
checksum_ok = C218chksum_ok;
|
|
break;
|
|
default:
|
|
key = C320_key;
|
|
keycode = C320_KeyCode;
|
|
loadbuf = C320_LoadBuf;
|
|
loadlen = C320DLoad_len;
|
|
checksum = C320check_sum;
|
|
checksum_ok = C320chksum_ok;
|
|
break;
|
|
}
|
|
|
|
usum = 0;
|
|
wlen = len >> 1;
|
|
for (i = 0; i < wlen; i++)
|
|
usum += le16_to_cpu(uptr[i]);
|
|
retry = 0;
|
|
do {
|
|
wlen = len >> 1;
|
|
j = 0;
|
|
while (wlen) {
|
|
len2 = (wlen > 2048) ? 2048 : wlen;
|
|
wlen -= len2;
|
|
memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
|
|
j += len2 << 1;
|
|
|
|
writew(len2, baseAddr + loadlen);
|
|
writew(0, baseAddr + key);
|
|
for (i = 0; i < 100; i++) {
|
|
if (readw(baseAddr + key) == keycode)
|
|
break;
|
|
msleep(10);
|
|
}
|
|
if (readw(baseAddr + key) != keycode)
|
|
return -EIO;
|
|
}
|
|
writew(0, baseAddr + loadlen);
|
|
writew(usum, baseAddr + checksum);
|
|
writew(0, baseAddr + key);
|
|
for (i = 0; i < 100; i++) {
|
|
if (readw(baseAddr + key) == keycode)
|
|
break;
|
|
msleep(10);
|
|
}
|
|
retry++;
|
|
} while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
|
|
if (readb(baseAddr + checksum_ok) != 1)
|
|
return -EIO;
|
|
|
|
writew(0, baseAddr + key);
|
|
for (i = 0; i < 600; i++) {
|
|
if (readw(baseAddr + Magic_no) == Magic_code)
|
|
break;
|
|
msleep(10);
|
|
}
|
|
if (readw(baseAddr + Magic_no) != Magic_code)
|
|
return -EIO;
|
|
|
|
if (MOXA_IS_320(brd)) {
|
|
if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
|
|
writew(0x3800, baseAddr + TMS320_PORT1);
|
|
writew(0x3900, baseAddr + TMS320_PORT2);
|
|
writew(28499, baseAddr + TMS320_CLOCK);
|
|
} else {
|
|
writew(0x3200, baseAddr + TMS320_PORT1);
|
|
writew(0x3400, baseAddr + TMS320_PORT2);
|
|
writew(19999, baseAddr + TMS320_CLOCK);
|
|
}
|
|
}
|
|
writew(1, baseAddr + Disable_IRQ);
|
|
writew(0, baseAddr + Magic_no);
|
|
for (i = 0; i < 500; i++) {
|
|
if (readw(baseAddr + Magic_no) == Magic_code)
|
|
break;
|
|
msleep(10);
|
|
}
|
|
if (readw(baseAddr + Magic_no) != Magic_code)
|
|
return -EIO;
|
|
|
|
if (MOXA_IS_320(brd)) {
|
|
j = readw(baseAddr + Module_cnt);
|
|
if (j <= 0)
|
|
return -EIO;
|
|
brd->numPorts = j * 8;
|
|
writew(j, baseAddr + Module_no);
|
|
writew(0, baseAddr + Magic_no);
|
|
for (i = 0; i < 600; i++) {
|
|
if (readw(baseAddr + Magic_no) == Magic_code)
|
|
break;
|
|
msleep(10);
|
|
}
|
|
if (readw(baseAddr + Magic_no) != Magic_code)
|
|
return -EIO;
|
|
}
|
|
brd->intNdx = baseAddr + IRQindex;
|
|
brd->intPend = baseAddr + IRQpending;
|
|
brd->intTable = baseAddr + IRQtable;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
|
|
size_t len)
|
|
{
|
|
void __iomem *ofsAddr, *baseAddr = brd->basemem;
|
|
struct moxa_port *port;
|
|
int retval, i;
|
|
|
|
if (len % 2) {
|
|
printk(KERN_ERR "MOXA: bios length is not even\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
|
|
if (retval)
|
|
return retval;
|
|
|
|
switch (brd->boardType) {
|
|
case MOXA_BOARD_C218_ISA:
|
|
case MOXA_BOARD_C218_PCI:
|
|
case MOXA_BOARD_CP204J:
|
|
port = brd->ports;
|
|
for (i = 0; i < brd->numPorts; i++, port++) {
|
|
port->board = brd;
|
|
port->DCDState = 0;
|
|
port->tableAddr = baseAddr + Extern_table +
|
|
Extern_size * i;
|
|
ofsAddr = port->tableAddr;
|
|
writew(C218rx_mask, ofsAddr + RX_mask);
|
|
writew(C218tx_mask, ofsAddr + TX_mask);
|
|
writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
|
|
writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
|
|
|
|
writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
|
|
writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
|
|
|
|
}
|
|
break;
|
|
default:
|
|
port = brd->ports;
|
|
for (i = 0; i < brd->numPorts; i++, port++) {
|
|
port->board = brd;
|
|
port->DCDState = 0;
|
|
port->tableAddr = baseAddr + Extern_table +
|
|
Extern_size * i;
|
|
ofsAddr = port->tableAddr;
|
|
switch (brd->numPorts) {
|
|
case 8:
|
|
writew(C320p8rx_mask, ofsAddr + RX_mask);
|
|
writew(C320p8tx_mask, ofsAddr + TX_mask);
|
|
writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
|
|
writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
|
|
writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
|
|
writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
|
|
|
|
break;
|
|
case 16:
|
|
writew(C320p16rx_mask, ofsAddr + RX_mask);
|
|
writew(C320p16tx_mask, ofsAddr + TX_mask);
|
|
writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
|
|
writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
|
|
writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
|
|
writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
|
|
break;
|
|
|
|
case 24:
|
|
writew(C320p24rx_mask, ofsAddr + RX_mask);
|
|
writew(C320p24tx_mask, ofsAddr + TX_mask);
|
|
writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
|
|
writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
|
|
writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
|
|
writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
|
|
break;
|
|
case 32:
|
|
writew(C320p32rx_mask, ofsAddr + RX_mask);
|
|
writew(C320p32tx_mask, ofsAddr + TX_mask);
|
|
writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
|
|
writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
|
|
writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
|
|
writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
|
|
writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
|
|
{
|
|
const void *ptr = fw->data;
|
|
char rsn[64];
|
|
u16 lens[5];
|
|
size_t len;
|
|
unsigned int a, lenp, lencnt;
|
|
int ret = -EINVAL;
|
|
struct {
|
|
__le32 magic; /* 0x34303430 */
|
|
u8 reserved1[2];
|
|
u8 type; /* UNIX = 3 */
|
|
u8 model; /* C218T=1, C320T=2, CP204=3 */
|
|
u8 reserved2[8];
|
|
__le16 len[5];
|
|
} const *hdr = ptr;
|
|
|
|
BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
|
|
|
|
if (fw->size < MOXA_FW_HDRLEN) {
|
|
strcpy(rsn, "too short (even header won't fit)");
|
|
goto err;
|
|
}
|
|
if (hdr->magic != cpu_to_le32(0x30343034)) {
|
|
sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
|
|
goto err;
|
|
}
|
|
if (hdr->type != 3) {
|
|
sprintf(rsn, "not for linux, type is %u", hdr->type);
|
|
goto err;
|
|
}
|
|
if (moxa_check_fw_model(brd, hdr->model)) {
|
|
sprintf(rsn, "not for this card, model is %u", hdr->model);
|
|
goto err;
|
|
}
|
|
|
|
len = MOXA_FW_HDRLEN;
|
|
lencnt = hdr->model == 2 ? 5 : 3;
|
|
for (a = 0; a < ARRAY_SIZE(lens); a++) {
|
|
lens[a] = le16_to_cpu(hdr->len[a]);
|
|
if (lens[a] && len + lens[a] <= fw->size &&
|
|
moxa_check_fw(&fw->data[len]))
|
|
printk(KERN_WARNING "MOXA firmware: unexpected input "
|
|
"at offset %u, but going on\n", (u32)len);
|
|
if (!lens[a] && a < lencnt) {
|
|
sprintf(rsn, "too few entries in fw file");
|
|
goto err;
|
|
}
|
|
len += lens[a];
|
|
}
|
|
|
|
if (len != fw->size) {
|
|
sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
|
|
(u32)len);
|
|
goto err;
|
|
}
|
|
|
|
ptr += MOXA_FW_HDRLEN;
|
|
lenp = 0; /* bios */
|
|
|
|
strcpy(rsn, "read above");
|
|
|
|
ret = moxa_load_bios(brd, ptr, lens[lenp]);
|
|
if (ret)
|
|
goto err;
|
|
|
|
/* we skip the tty section (lens[1]), since we don't need it */
|
|
ptr += lens[lenp] + lens[lenp + 1];
|
|
lenp += 2; /* comm */
|
|
|
|
if (hdr->model == 2) {
|
|
ret = moxa_load_320b(brd, ptr, lens[lenp]);
|
|
if (ret)
|
|
goto err;
|
|
/* skip another tty */
|
|
ptr += lens[lenp] + lens[lenp + 1];
|
|
lenp += 2;
|
|
}
|
|
|
|
ret = moxa_load_code(brd, ptr, lens[lenp]);
|
|
if (ret)
|
|
goto err;
|
|
|
|
return 0;
|
|
err:
|
|
printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
|
|
return ret;
|
|
}
|
|
|
|
static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
|
|
{
|
|
const struct firmware *fw;
|
|
const char *file;
|
|
struct moxa_port *p;
|
|
unsigned int i, first_idx;
|
|
int ret;
|
|
|
|
brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
|
|
GFP_KERNEL);
|
|
if (brd->ports == NULL) {
|
|
printk(KERN_ERR "cannot allocate memory for ports\n");
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
|
|
tty_port_init(&p->port);
|
|
p->port.ops = &moxa_port_ops;
|
|
p->type = PORT_16550A;
|
|
p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
|
|
}
|
|
|
|
switch (brd->boardType) {
|
|
case MOXA_BOARD_C218_ISA:
|
|
case MOXA_BOARD_C218_PCI:
|
|
file = "c218tunx.cod";
|
|
break;
|
|
case MOXA_BOARD_CP204J:
|
|
file = "cp204unx.cod";
|
|
break;
|
|
default:
|
|
file = "c320tunx.cod";
|
|
break;
|
|
}
|
|
|
|
ret = request_firmware(&fw, file, dev);
|
|
if (ret) {
|
|
printk(KERN_ERR "MOXA: request_firmware failed. Make sure "
|
|
"you've placed '%s' file into your firmware "
|
|
"loader directory (e.g. /lib/firmware)\n",
|
|
file);
|
|
goto err_free;
|
|
}
|
|
|
|
ret = moxa_load_fw(brd, fw);
|
|
|
|
release_firmware(fw);
|
|
|
|
if (ret)
|
|
goto err_free;
|
|
|
|
spin_lock_bh(&moxa_lock);
|
|
brd->ready = 1;
|
|
if (!timer_pending(&moxaTimer))
|
|
mod_timer(&moxaTimer, jiffies + HZ / 50);
|
|
spin_unlock_bh(&moxa_lock);
|
|
|
|
first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD;
|
|
for (i = 0; i < brd->numPorts; i++)
|
|
tty_port_register_device(&brd->ports[i].port, moxaDriver,
|
|
first_idx + i, dev);
|
|
|
|
return 0;
|
|
err_free:
|
|
for (i = 0; i < MAX_PORTS_PER_BOARD; i++)
|
|
tty_port_destroy(&brd->ports[i].port);
|
|
kfree(brd->ports);
|
|
err:
|
|
return ret;
|
|
}
|
|
|
|
static void moxa_board_deinit(struct moxa_board_conf *brd)
|
|
{
|
|
unsigned int a, opened, first_idx;
|
|
|
|
mutex_lock(&moxa_openlock);
|
|
spin_lock_bh(&moxa_lock);
|
|
brd->ready = 0;
|
|
spin_unlock_bh(&moxa_lock);
|
|
|
|
/* pci hot-un-plug support */
|
|
for (a = 0; a < brd->numPorts; a++)
|
|
if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
|
|
tty_port_tty_hangup(&brd->ports[a].port, false);
|
|
|
|
for (a = 0; a < MAX_PORTS_PER_BOARD; a++)
|
|
tty_port_destroy(&brd->ports[a].port);
|
|
|
|
while (1) {
|
|
opened = 0;
|
|
for (a = 0; a < brd->numPorts; a++)
|
|
if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
|
|
opened++;
|
|
mutex_unlock(&moxa_openlock);
|
|
if (!opened)
|
|
break;
|
|
msleep(50);
|
|
mutex_lock(&moxa_openlock);
|
|
}
|
|
|
|
first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD;
|
|
for (a = 0; a < brd->numPorts; a++)
|
|
tty_unregister_device(moxaDriver, first_idx + a);
|
|
|
|
iounmap(brd->basemem);
|
|
brd->basemem = NULL;
|
|
kfree(brd->ports);
|
|
}
|
|
|
|
#ifdef CONFIG_PCI
|
|
static int moxa_pci_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
struct moxa_board_conf *board;
|
|
unsigned int i;
|
|
int board_type = ent->driver_data;
|
|
int retval;
|
|
|
|
retval = pci_enable_device(pdev);
|
|
if (retval) {
|
|
dev_err(&pdev->dev, "can't enable pci device\n");
|
|
goto err;
|
|
}
|
|
|
|
for (i = 0; i < MAX_BOARDS; i++)
|
|
if (moxa_boards[i].basemem == NULL)
|
|
break;
|
|
|
|
retval = -ENODEV;
|
|
if (i >= MAX_BOARDS) {
|
|
dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
|
|
"found. Board is ignored.\n", MAX_BOARDS);
|
|
goto err;
|
|
}
|
|
|
|
board = &moxa_boards[i];
|
|
|
|
retval = pci_request_region(pdev, 2, "moxa-base");
|
|
if (retval) {
|
|
dev_err(&pdev->dev, "can't request pci region 2\n");
|
|
goto err;
|
|
}
|
|
|
|
board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000);
|
|
if (board->basemem == NULL) {
|
|
dev_err(&pdev->dev, "can't remap io space 2\n");
|
|
retval = -ENOMEM;
|
|
goto err_reg;
|
|
}
|
|
|
|
board->boardType = board_type;
|
|
switch (board_type) {
|
|
case MOXA_BOARD_C218_ISA:
|
|
case MOXA_BOARD_C218_PCI:
|
|
board->numPorts = 8;
|
|
break;
|
|
|
|
case MOXA_BOARD_CP204J:
|
|
board->numPorts = 4;
|
|
break;
|
|
default:
|
|
board->numPorts = 0;
|
|
break;
|
|
}
|
|
board->busType = MOXA_BUS_TYPE_PCI;
|
|
|
|
retval = moxa_init_board(board, &pdev->dev);
|
|
if (retval)
|
|
goto err_base;
|
|
|
|
pci_set_drvdata(pdev, board);
|
|
|
|
dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
|
|
moxa_brdname[board_type - 1], board->numPorts);
|
|
|
|
return 0;
|
|
err_base:
|
|
iounmap(board->basemem);
|
|
board->basemem = NULL;
|
|
err_reg:
|
|
pci_release_region(pdev, 2);
|
|
err:
|
|
return retval;
|
|
}
|
|
|
|
static void moxa_pci_remove(struct pci_dev *pdev)
|
|
{
|
|
struct moxa_board_conf *brd = pci_get_drvdata(pdev);
|
|
|
|
moxa_board_deinit(brd);
|
|
|
|
pci_release_region(pdev, 2);
|
|
}
|
|
|
|
static struct pci_driver moxa_pci_driver = {
|
|
.name = "moxa",
|
|
.id_table = moxa_pcibrds,
|
|
.probe = moxa_pci_probe,
|
|
.remove = moxa_pci_remove
|
|
};
|
|
#endif /* CONFIG_PCI */
|
|
|
|
static int __init moxa_init(void)
|
|
{
|
|
unsigned int isabrds = 0;
|
|
int retval = 0;
|
|
struct moxa_board_conf *brd = moxa_boards;
|
|
unsigned int i;
|
|
|
|
printk(KERN_INFO "MOXA Intellio family driver version %s\n",
|
|
MOXA_VERSION);
|
|
|
|
tty_port_init(&moxa_service_port);
|
|
|
|
moxaDriver = tty_alloc_driver(MAX_PORTS + 1,
|
|
TTY_DRIVER_REAL_RAW |
|
|
TTY_DRIVER_DYNAMIC_DEV);
|
|
if (IS_ERR(moxaDriver))
|
|
return PTR_ERR(moxaDriver);
|
|
|
|
moxaDriver->name = "ttyMX";
|
|
moxaDriver->major = ttymajor;
|
|
moxaDriver->minor_start = 0;
|
|
moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
|
|
moxaDriver->subtype = SERIAL_TYPE_NORMAL;
|
|
moxaDriver->init_termios = tty_std_termios;
|
|
moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
|
|
moxaDriver->init_termios.c_ispeed = 9600;
|
|
moxaDriver->init_termios.c_ospeed = 9600;
|
|
tty_set_operations(moxaDriver, &moxa_ops);
|
|
/* Having one more port only for ioctls is ugly */
|
|
tty_port_link_device(&moxa_service_port, moxaDriver, MAX_PORTS);
|
|
|
|
if (tty_register_driver(moxaDriver)) {
|
|
printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
|
|
put_tty_driver(moxaDriver);
|
|
return -1;
|
|
}
|
|
|
|
/* Find the boards defined from module args. */
|
|
|
|
for (i = 0; i < MAX_BOARDS; i++) {
|
|
if (!baseaddr[i])
|
|
break;
|
|
if (type[i] == MOXA_BOARD_C218_ISA ||
|
|
type[i] == MOXA_BOARD_C320_ISA) {
|
|
pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
|
|
isabrds + 1, moxa_brdname[type[i] - 1],
|
|
baseaddr[i]);
|
|
brd->boardType = type[i];
|
|
brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
|
|
numports[i];
|
|
brd->busType = MOXA_BUS_TYPE_ISA;
|
|
brd->basemem = ioremap_nocache(baseaddr[i], 0x4000);
|
|
if (!brd->basemem) {
|
|
printk(KERN_ERR "MOXA: can't remap %lx\n",
|
|
baseaddr[i]);
|
|
continue;
|
|
}
|
|
if (moxa_init_board(brd, NULL)) {
|
|
iounmap(brd->basemem);
|
|
brd->basemem = NULL;
|
|
continue;
|
|
}
|
|
|
|
printk(KERN_INFO "MOXA isa board found at 0x%.8lx and "
|
|
"ready (%u ports, firmware loaded)\n",
|
|
baseaddr[i], brd->numPorts);
|
|
|
|
brd++;
|
|
isabrds++;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_PCI
|
|
retval = pci_register_driver(&moxa_pci_driver);
|
|
if (retval) {
|
|
printk(KERN_ERR "Can't register MOXA pci driver!\n");
|
|
if (isabrds)
|
|
retval = 0;
|
|
}
|
|
#endif
|
|
|
|
return retval;
|
|
}
|
|
|
|
static void __exit moxa_exit(void)
|
|
{
|
|
unsigned int i;
|
|
|
|
#ifdef CONFIG_PCI
|
|
pci_unregister_driver(&moxa_pci_driver);
|
|
#endif
|
|
|
|
for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
|
|
if (moxa_boards[i].ready)
|
|
moxa_board_deinit(&moxa_boards[i]);
|
|
|
|
del_timer_sync(&moxaTimer);
|
|
|
|
if (tty_unregister_driver(moxaDriver))
|
|
printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
|
|
"serial driver\n");
|
|
put_tty_driver(moxaDriver);
|
|
}
|
|
|
|
module_init(moxa_init);
|
|
module_exit(moxa_exit);
|
|
|
|
static void moxa_shutdown(struct tty_port *port)
|
|
{
|
|
struct moxa_port *ch = container_of(port, struct moxa_port, port);
|
|
MoxaPortDisable(ch);
|
|
MoxaPortFlushData(ch, 2);
|
|
}
|
|
|
|
static int moxa_carrier_raised(struct tty_port *port)
|
|
{
|
|
struct moxa_port *ch = container_of(port, struct moxa_port, port);
|
|
int dcd;
|
|
|
|
spin_lock_irq(&port->lock);
|
|
dcd = ch->DCDState;
|
|
spin_unlock_irq(&port->lock);
|
|
return dcd;
|
|
}
|
|
|
|
static void moxa_dtr_rts(struct tty_port *port, int onoff)
|
|
{
|
|
struct moxa_port *ch = container_of(port, struct moxa_port, port);
|
|
MoxaPortLineCtrl(ch, onoff, onoff);
|
|
}
|
|
|
|
|
|
static int moxa_open(struct tty_struct *tty, struct file *filp)
|
|
{
|
|
struct moxa_board_conf *brd;
|
|
struct moxa_port *ch;
|
|
int port;
|
|
|
|
port = tty->index;
|
|
if (port == MAX_PORTS) {
|
|
return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
|
|
}
|
|
if (mutex_lock_interruptible(&moxa_openlock))
|
|
return -ERESTARTSYS;
|
|
brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
|
|
if (!brd->ready) {
|
|
mutex_unlock(&moxa_openlock);
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) {
|
|
mutex_unlock(&moxa_openlock);
|
|
return -ENODEV;
|
|
}
|
|
|
|
ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
|
|
ch->port.count++;
|
|
tty->driver_data = ch;
|
|
tty_port_tty_set(&ch->port, tty);
|
|
mutex_lock(&ch->port.mutex);
|
|
if (!(ch->port.flags & ASYNC_INITIALIZED)) {
|
|
ch->statusflags = 0;
|
|
moxa_set_tty_param(tty, &tty->termios);
|
|
MoxaPortLineCtrl(ch, 1, 1);
|
|
MoxaPortEnable(ch);
|
|
MoxaSetFifo(ch, ch->type == PORT_16550A);
|
|
ch->port.flags |= ASYNC_INITIALIZED;
|
|
}
|
|
mutex_unlock(&ch->port.mutex);
|
|
mutex_unlock(&moxa_openlock);
|
|
|
|
return tty_port_block_til_ready(&ch->port, tty, filp);
|
|
}
|
|
|
|
static void moxa_close(struct tty_struct *tty, struct file *filp)
|
|
{
|
|
struct moxa_port *ch = tty->driver_data;
|
|
ch->cflag = tty->termios.c_cflag;
|
|
tty_port_close(&ch->port, tty, filp);
|
|
}
|
|
|
|
static int moxa_write(struct tty_struct *tty,
|
|
const unsigned char *buf, int count)
|
|
{
|
|
struct moxa_port *ch = tty->driver_data;
|
|
unsigned long flags;
|
|
int len;
|
|
|
|
if (ch == NULL)
|
|
return 0;
|
|
|
|
spin_lock_irqsave(&moxa_lock, flags);
|
|
len = MoxaPortWriteData(tty, buf, count);
|
|
spin_unlock_irqrestore(&moxa_lock, flags);
|
|
|
|
set_bit(LOWWAIT, &ch->statusflags);
|
|
return len;
|
|
}
|
|
|
|
static int moxa_write_room(struct tty_struct *tty)
|
|
{
|
|
struct moxa_port *ch;
|
|
|
|
if (tty->stopped)
|
|
return 0;
|
|
ch = tty->driver_data;
|
|
if (ch == NULL)
|
|
return 0;
|
|
return MoxaPortTxFree(ch);
|
|
}
|
|
|
|
static void moxa_flush_buffer(struct tty_struct *tty)
|
|
{
|
|
struct moxa_port *ch = tty->driver_data;
|
|
|
|
if (ch == NULL)
|
|
return;
|
|
MoxaPortFlushData(ch, 1);
|
|
tty_wakeup(tty);
|
|
}
|
|
|
|
static int moxa_chars_in_buffer(struct tty_struct *tty)
|
|
{
|
|
struct moxa_port *ch = tty->driver_data;
|
|
int chars;
|
|
|
|
chars = MoxaPortTxQueue(ch);
|
|
if (chars)
|
|
/*
|
|
* Make it possible to wakeup anything waiting for output
|
|
* in tty_ioctl.c, etc.
|
|
*/
|
|
set_bit(EMPTYWAIT, &ch->statusflags);
|
|
return chars;
|
|
}
|
|
|
|
static int moxa_tiocmget(struct tty_struct *tty)
|
|
{
|
|
struct moxa_port *ch = tty->driver_data;
|
|
int flag = 0, dtr, rts;
|
|
|
|
MoxaPortGetLineOut(ch, &dtr, &rts);
|
|
if (dtr)
|
|
flag |= TIOCM_DTR;
|
|
if (rts)
|
|
flag |= TIOCM_RTS;
|
|
dtr = MoxaPortLineStatus(ch);
|
|
if (dtr & 1)
|
|
flag |= TIOCM_CTS;
|
|
if (dtr & 2)
|
|
flag |= TIOCM_DSR;
|
|
if (dtr & 4)
|
|
flag |= TIOCM_CD;
|
|
return flag;
|
|
}
|
|
|
|
static int moxa_tiocmset(struct tty_struct *tty,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
struct moxa_port *ch;
|
|
int dtr, rts;
|
|
|
|
mutex_lock(&moxa_openlock);
|
|
ch = tty->driver_data;
|
|
if (!ch) {
|
|
mutex_unlock(&moxa_openlock);
|
|
return -EINVAL;
|
|
}
|
|
|
|
MoxaPortGetLineOut(ch, &dtr, &rts);
|
|
if (set & TIOCM_RTS)
|
|
rts = 1;
|
|
if (set & TIOCM_DTR)
|
|
dtr = 1;
|
|
if (clear & TIOCM_RTS)
|
|
rts = 0;
|
|
if (clear & TIOCM_DTR)
|
|
dtr = 0;
|
|
MoxaPortLineCtrl(ch, dtr, rts);
|
|
mutex_unlock(&moxa_openlock);
|
|
return 0;
|
|
}
|
|
|
|
static void moxa_set_termios(struct tty_struct *tty,
|
|
struct ktermios *old_termios)
|
|
{
|
|
struct moxa_port *ch = tty->driver_data;
|
|
|
|
if (ch == NULL)
|
|
return;
|
|
moxa_set_tty_param(tty, old_termios);
|
|
if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
|
|
wake_up_interruptible(&ch->port.open_wait);
|
|
}
|
|
|
|
static void moxa_stop(struct tty_struct *tty)
|
|
{
|
|
struct moxa_port *ch = tty->driver_data;
|
|
|
|
if (ch == NULL)
|
|
return;
|
|
MoxaPortTxDisable(ch);
|
|
set_bit(TXSTOPPED, &ch->statusflags);
|
|
}
|
|
|
|
|
|
static void moxa_start(struct tty_struct *tty)
|
|
{
|
|
struct moxa_port *ch = tty->driver_data;
|
|
|
|
if (ch == NULL)
|
|
return;
|
|
|
|
if (!test_bit(TXSTOPPED, &ch->statusflags))
|
|
return;
|
|
|
|
MoxaPortTxEnable(ch);
|
|
clear_bit(TXSTOPPED, &ch->statusflags);
|
|
}
|
|
|
|
static void moxa_hangup(struct tty_struct *tty)
|
|
{
|
|
struct moxa_port *ch = tty->driver_data;
|
|
tty_port_hangup(&ch->port);
|
|
}
|
|
|
|
static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
|
|
{
|
|
unsigned long flags;
|
|
dcd = !!dcd;
|
|
|
|
spin_lock_irqsave(&p->port.lock, flags);
|
|
if (dcd != p->DCDState) {
|
|
p->DCDState = dcd;
|
|
spin_unlock_irqrestore(&p->port.lock, flags);
|
|
if (!dcd)
|
|
tty_port_tty_hangup(&p->port, true);
|
|
}
|
|
else
|
|
spin_unlock_irqrestore(&p->port.lock, flags);
|
|
}
|
|
|
|
static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
|
|
u16 __iomem *ip)
|
|
{
|
|
struct tty_struct *tty = tty_port_tty_get(&p->port);
|
|
void __iomem *ofsAddr;
|
|
unsigned int inited = p->port.flags & ASYNC_INITIALIZED;
|
|
u16 intr;
|
|
|
|
if (tty) {
|
|
if (test_bit(EMPTYWAIT, &p->statusflags) &&
|
|
MoxaPortTxQueue(p) == 0) {
|
|
clear_bit(EMPTYWAIT, &p->statusflags);
|
|
tty_wakeup(tty);
|
|
}
|
|
if (test_bit(LOWWAIT, &p->statusflags) && !tty->stopped &&
|
|
MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
|
|
clear_bit(LOWWAIT, &p->statusflags);
|
|
tty_wakeup(tty);
|
|
}
|
|
|
|
if (inited && !test_bit(TTY_THROTTLED, &tty->flags) &&
|
|
MoxaPortRxQueue(p) > 0) { /* RX */
|
|
MoxaPortReadData(p);
|
|
tty_schedule_flip(&p->port);
|
|
}
|
|
} else {
|
|
clear_bit(EMPTYWAIT, &p->statusflags);
|
|
MoxaPortFlushData(p, 0); /* flush RX */
|
|
}
|
|
|
|
if (!handle) /* nothing else to do */
|
|
goto put;
|
|
|
|
intr = readw(ip); /* port irq status */
|
|
if (intr == 0)
|
|
goto put;
|
|
|
|
writew(0, ip); /* ACK port */
|
|
ofsAddr = p->tableAddr;
|
|
if (intr & IntrTx) /* disable tx intr */
|
|
writew(readw(ofsAddr + HostStat) & ~WakeupTx,
|
|
ofsAddr + HostStat);
|
|
|
|
if (!inited)
|
|
goto put;
|
|
|
|
if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
|
|
tty_insert_flip_char(&p->port, 0, TTY_BREAK);
|
|
tty_schedule_flip(&p->port);
|
|
}
|
|
|
|
if (intr & IntrLine)
|
|
moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
|
|
put:
|
|
tty_kref_put(tty);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void moxa_poll(unsigned long ignored)
|
|
{
|
|
struct moxa_board_conf *brd;
|
|
u16 __iomem *ip;
|
|
unsigned int card, port, served = 0;
|
|
|
|
spin_lock(&moxa_lock);
|
|
for (card = 0; card < MAX_BOARDS; card++) {
|
|
brd = &moxa_boards[card];
|
|
if (!brd->ready)
|
|
continue;
|
|
|
|
served++;
|
|
|
|
ip = NULL;
|
|
if (readb(brd->intPend) == 0xff)
|
|
ip = brd->intTable + readb(brd->intNdx);
|
|
|
|
for (port = 0; port < brd->numPorts; port++)
|
|
moxa_poll_port(&brd->ports[port], !!ip, ip + port);
|
|
|
|
if (ip)
|
|
writeb(0, brd->intPend); /* ACK */
|
|
|
|
if (moxaLowWaterChk) {
|
|
struct moxa_port *p = brd->ports;
|
|
for (port = 0; port < brd->numPorts; port++, p++)
|
|
if (p->lowChkFlag) {
|
|
p->lowChkFlag = 0;
|
|
moxa_low_water_check(p->tableAddr);
|
|
}
|
|
}
|
|
}
|
|
moxaLowWaterChk = 0;
|
|
|
|
if (served)
|
|
mod_timer(&moxaTimer, jiffies + HZ / 50);
|
|
spin_unlock(&moxa_lock);
|
|
}
|
|
|
|
/******************************************************************************/
|
|
|
|
static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
|
|
{
|
|
register struct ktermios *ts = &tty->termios;
|
|
struct moxa_port *ch = tty->driver_data;
|
|
int rts, cts, txflow, rxflow, xany, baud;
|
|
|
|
rts = cts = txflow = rxflow = xany = 0;
|
|
if (ts->c_cflag & CRTSCTS)
|
|
rts = cts = 1;
|
|
if (ts->c_iflag & IXON)
|
|
txflow = 1;
|
|
if (ts->c_iflag & IXOFF)
|
|
rxflow = 1;
|
|
if (ts->c_iflag & IXANY)
|
|
xany = 1;
|
|
|
|
/* Clear the features we don't support */
|
|
ts->c_cflag &= ~CMSPAR;
|
|
MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
|
|
baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
|
|
if (baud == -1)
|
|
baud = tty_termios_baud_rate(old_termios);
|
|
/* Not put the baud rate into the termios data */
|
|
tty_encode_baud_rate(tty, baud, baud);
|
|
}
|
|
|
|
/*****************************************************************************
|
|
* Driver level functions: *
|
|
*****************************************************************************/
|
|
|
|
static void MoxaPortFlushData(struct moxa_port *port, int mode)
|
|
{
|
|
void __iomem *ofsAddr;
|
|
if (mode < 0 || mode > 2)
|
|
return;
|
|
ofsAddr = port->tableAddr;
|
|
moxafunc(ofsAddr, FC_FlushQueue, mode);
|
|
if (mode != 1) {
|
|
port->lowChkFlag = 0;
|
|
moxa_low_water_check(ofsAddr);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Moxa Port Number Description:
|
|
*
|
|
* MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
|
|
* the port number using in MOXA driver functions will be 0 to 31 for
|
|
* first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
|
|
* to 127 for fourth. For example, if you setup three MOXA boards,
|
|
* first board is C218, second board is C320-16 and third board is
|
|
* C320-32. The port number of first board (C218 - 8 ports) is from
|
|
* 0 to 7. The port number of second board (C320 - 16 ports) is form
|
|
* 32 to 47. The port number of third board (C320 - 32 ports) is from
|
|
* 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
|
|
* 127 will be invalid.
|
|
*
|
|
*
|
|
* Moxa Functions Description:
|
|
*
|
|
* Function 1: Driver initialization routine, this routine must be
|
|
* called when initialized driver.
|
|
* Syntax:
|
|
* void MoxaDriverInit();
|
|
*
|
|
*
|
|
* Function 2: Moxa driver private IOCTL command processing.
|
|
* Syntax:
|
|
* int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
|
|
*
|
|
* unsigned int cmd : IOCTL command
|
|
* unsigned long arg : IOCTL argument
|
|
* int port : port number (0 - 127)
|
|
*
|
|
* return: 0 (OK)
|
|
* -EINVAL
|
|
* -ENOIOCTLCMD
|
|
*
|
|
*
|
|
* Function 6: Enable this port to start Tx/Rx data.
|
|
* Syntax:
|
|
* void MoxaPortEnable(int port);
|
|
* int port : port number (0 - 127)
|
|
*
|
|
*
|
|
* Function 7: Disable this port
|
|
* Syntax:
|
|
* void MoxaPortDisable(int port);
|
|
* int port : port number (0 - 127)
|
|
*
|
|
*
|
|
* Function 10: Setting baud rate of this port.
|
|
* Syntax:
|
|
* speed_t MoxaPortSetBaud(int port, speed_t baud);
|
|
* int port : port number (0 - 127)
|
|
* long baud : baud rate (50 - 115200)
|
|
*
|
|
* return: 0 : this port is invalid or baud < 50
|
|
* 50 - 115200 : the real baud rate set to the port, if
|
|
* the argument baud is large than maximun
|
|
* available baud rate, the real setting
|
|
* baud rate will be the maximun baud rate.
|
|
*
|
|
*
|
|
* Function 12: Configure the port.
|
|
* Syntax:
|
|
* int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
|
|
* int port : port number (0 - 127)
|
|
* struct ktermios * termio : termio structure pointer
|
|
* speed_t baud : baud rate
|
|
*
|
|
* return: -1 : this port is invalid or termio == NULL
|
|
* 0 : setting O.K.
|
|
*
|
|
*
|
|
* Function 13: Get the DTR/RTS state of this port.
|
|
* Syntax:
|
|
* int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
|
|
* int port : port number (0 - 127)
|
|
* int * dtrState : pointer to INT to receive the current DTR
|
|
* state. (if NULL, this function will not
|
|
* write to this address)
|
|
* int * rtsState : pointer to INT to receive the current RTS
|
|
* state. (if NULL, this function will not
|
|
* write to this address)
|
|
*
|
|
* return: -1 : this port is invalid
|
|
* 0 : O.K.
|
|
*
|
|
*
|
|
* Function 14: Setting the DTR/RTS output state of this port.
|
|
* Syntax:
|
|
* void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
|
|
* int port : port number (0 - 127)
|
|
* int dtrState : DTR output state (0: off, 1: on)
|
|
* int rtsState : RTS output state (0: off, 1: on)
|
|
*
|
|
*
|
|
* Function 15: Setting the flow control of this port.
|
|
* Syntax:
|
|
* void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
|
|
* int txFlow,int xany);
|
|
* int port : port number (0 - 127)
|
|
* int rtsFlow : H/W RTS flow control (0: no, 1: yes)
|
|
* int ctsFlow : H/W CTS flow control (0: no, 1: yes)
|
|
* int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
|
|
* int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
|
|
* int xany : S/W XANY flow control (0: no, 1: yes)
|
|
*
|
|
*
|
|
* Function 16: Get ths line status of this port
|
|
* Syntax:
|
|
* int MoxaPortLineStatus(int port);
|
|
* int port : port number (0 - 127)
|
|
*
|
|
* return: Bit 0 - CTS state (0: off, 1: on)
|
|
* Bit 1 - DSR state (0: off, 1: on)
|
|
* Bit 2 - DCD state (0: off, 1: on)
|
|
*
|
|
*
|
|
* Function 19: Flush the Rx/Tx buffer data of this port.
|
|
* Syntax:
|
|
* void MoxaPortFlushData(int port, int mode);
|
|
* int port : port number (0 - 127)
|
|
* int mode
|
|
* 0 : flush the Rx buffer
|
|
* 1 : flush the Tx buffer
|
|
* 2 : flush the Rx and Tx buffer
|
|
*
|
|
*
|
|
* Function 20: Write data.
|
|
* Syntax:
|
|
* int MoxaPortWriteData(int port, unsigned char * buffer, int length);
|
|
* int port : port number (0 - 127)
|
|
* unsigned char * buffer : pointer to write data buffer.
|
|
* int length : write data length
|
|
*
|
|
* return: 0 - length : real write data length
|
|
*
|
|
*
|
|
* Function 21: Read data.
|
|
* Syntax:
|
|
* int MoxaPortReadData(int port, struct tty_struct *tty);
|
|
* int port : port number (0 - 127)
|
|
* struct tty_struct *tty : tty for data
|
|
*
|
|
* return: 0 - length : real read data length
|
|
*
|
|
*
|
|
* Function 24: Get the Tx buffer current queued data bytes
|
|
* Syntax:
|
|
* int MoxaPortTxQueue(int port);
|
|
* int port : port number (0 - 127)
|
|
*
|
|
* return: .. : Tx buffer current queued data bytes
|
|
*
|
|
*
|
|
* Function 25: Get the Tx buffer current free space
|
|
* Syntax:
|
|
* int MoxaPortTxFree(int port);
|
|
* int port : port number (0 - 127)
|
|
*
|
|
* return: .. : Tx buffer current free space
|
|
*
|
|
*
|
|
* Function 26: Get the Rx buffer current queued data bytes
|
|
* Syntax:
|
|
* int MoxaPortRxQueue(int port);
|
|
* int port : port number (0 - 127)
|
|
*
|
|
* return: .. : Rx buffer current queued data bytes
|
|
*
|
|
*
|
|
* Function 28: Disable port data transmission.
|
|
* Syntax:
|
|
* void MoxaPortTxDisable(int port);
|
|
* int port : port number (0 - 127)
|
|
*
|
|
*
|
|
* Function 29: Enable port data transmission.
|
|
* Syntax:
|
|
* void MoxaPortTxEnable(int port);
|
|
* int port : port number (0 - 127)
|
|
*
|
|
*
|
|
* Function 31: Get the received BREAK signal count and reset it.
|
|
* Syntax:
|
|
* int MoxaPortResetBrkCnt(int port);
|
|
* int port : port number (0 - 127)
|
|
*
|
|
* return: 0 - .. : BREAK signal count
|
|
*
|
|
*
|
|
*/
|
|
|
|
static void MoxaPortEnable(struct moxa_port *port)
|
|
{
|
|
void __iomem *ofsAddr;
|
|
u16 lowwater = 512;
|
|
|
|
ofsAddr = port->tableAddr;
|
|
writew(lowwater, ofsAddr + Low_water);
|
|
if (MOXA_IS_320(port->board))
|
|
moxafunc(ofsAddr, FC_SetBreakIrq, 0);
|
|
else
|
|
writew(readw(ofsAddr + HostStat) | WakeupBreak,
|
|
ofsAddr + HostStat);
|
|
|
|
moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
|
|
moxafunc(ofsAddr, FC_FlushQueue, 2);
|
|
|
|
moxafunc(ofsAddr, FC_EnableCH, Magic_code);
|
|
MoxaPortLineStatus(port);
|
|
}
|
|
|
|
static void MoxaPortDisable(struct moxa_port *port)
|
|
{
|
|
void __iomem *ofsAddr = port->tableAddr;
|
|
|
|
moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
|
|
moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
|
|
writew(0, ofsAddr + HostStat);
|
|
moxafunc(ofsAddr, FC_DisableCH, Magic_code);
|
|
}
|
|
|
|
static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
|
|
{
|
|
void __iomem *ofsAddr = port->tableAddr;
|
|
unsigned int clock, val;
|
|
speed_t max;
|
|
|
|
max = MOXA_IS_320(port->board) ? 460800 : 921600;
|
|
if (baud < 50)
|
|
return 0;
|
|
if (baud > max)
|
|
baud = max;
|
|
clock = 921600;
|
|
val = clock / baud;
|
|
moxafunc(ofsAddr, FC_SetBaud, val);
|
|
baud = clock / val;
|
|
return baud;
|
|
}
|
|
|
|
static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
|
|
speed_t baud)
|
|
{
|
|
void __iomem *ofsAddr;
|
|
tcflag_t mode = 0;
|
|
|
|
ofsAddr = port->tableAddr;
|
|
|
|
mode = termio->c_cflag & CSIZE;
|
|
if (mode == CS5)
|
|
mode = MX_CS5;
|
|
else if (mode == CS6)
|
|
mode = MX_CS6;
|
|
else if (mode == CS7)
|
|
mode = MX_CS7;
|
|
else if (mode == CS8)
|
|
mode = MX_CS8;
|
|
|
|
if (termio->c_cflag & CSTOPB) {
|
|
if (mode == MX_CS5)
|
|
mode |= MX_STOP15;
|
|
else
|
|
mode |= MX_STOP2;
|
|
} else
|
|
mode |= MX_STOP1;
|
|
|
|
if (termio->c_cflag & PARENB) {
|
|
if (termio->c_cflag & PARODD)
|
|
mode |= MX_PARODD;
|
|
else
|
|
mode |= MX_PAREVEN;
|
|
} else
|
|
mode |= MX_PARNONE;
|
|
|
|
moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
|
|
|
|
if (MOXA_IS_320(port->board) && baud >= 921600)
|
|
return -1;
|
|
|
|
baud = MoxaPortSetBaud(port, baud);
|
|
|
|
if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
|
|
spin_lock_irq(&moxafunc_lock);
|
|
writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
|
|
writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
|
|
writeb(FC_SetXonXoff, ofsAddr + FuncCode);
|
|
moxa_wait_finish(ofsAddr);
|
|
spin_unlock_irq(&moxafunc_lock);
|
|
|
|
}
|
|
return baud;
|
|
}
|
|
|
|
static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
|
|
int *rtsState)
|
|
{
|
|
if (dtrState)
|
|
*dtrState = !!(port->lineCtrl & DTR_ON);
|
|
if (rtsState)
|
|
*rtsState = !!(port->lineCtrl & RTS_ON);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
|
|
{
|
|
u8 mode = 0;
|
|
|
|
if (dtr)
|
|
mode |= DTR_ON;
|
|
if (rts)
|
|
mode |= RTS_ON;
|
|
port->lineCtrl = mode;
|
|
moxafunc(port->tableAddr, FC_LineControl, mode);
|
|
}
|
|
|
|
static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
|
|
int txflow, int rxflow, int txany)
|
|
{
|
|
int mode = 0;
|
|
|
|
if (rts)
|
|
mode |= RTS_FlowCtl;
|
|
if (cts)
|
|
mode |= CTS_FlowCtl;
|
|
if (txflow)
|
|
mode |= Tx_FlowCtl;
|
|
if (rxflow)
|
|
mode |= Rx_FlowCtl;
|
|
if (txany)
|
|
mode |= IXM_IXANY;
|
|
moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
|
|
}
|
|
|
|
static int MoxaPortLineStatus(struct moxa_port *port)
|
|
{
|
|
void __iomem *ofsAddr;
|
|
int val;
|
|
|
|
ofsAddr = port->tableAddr;
|
|
if (MOXA_IS_320(port->board))
|
|
val = moxafuncret(ofsAddr, FC_LineStatus, 0);
|
|
else
|
|
val = readw(ofsAddr + FlagStat) >> 4;
|
|
val &= 0x0B;
|
|
if (val & 8)
|
|
val |= 4;
|
|
moxa_new_dcdstate(port, val & 8);
|
|
val &= 7;
|
|
return val;
|
|
}
|
|
|
|
static int MoxaPortWriteData(struct tty_struct *tty,
|
|
const unsigned char *buffer, int len)
|
|
{
|
|
struct moxa_port *port = tty->driver_data;
|
|
void __iomem *baseAddr, *ofsAddr, *ofs;
|
|
unsigned int c, total;
|
|
u16 head, tail, tx_mask, spage, epage;
|
|
u16 pageno, pageofs, bufhead;
|
|
|
|
ofsAddr = port->tableAddr;
|
|
baseAddr = port->board->basemem;
|
|
tx_mask = readw(ofsAddr + TX_mask);
|
|
spage = readw(ofsAddr + Page_txb);
|
|
epage = readw(ofsAddr + EndPage_txb);
|
|
tail = readw(ofsAddr + TXwptr);
|
|
head = readw(ofsAddr + TXrptr);
|
|
c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
|
|
if (c > len)
|
|
c = len;
|
|
moxaLog.txcnt[port->port.tty->index] += c;
|
|
total = c;
|
|
if (spage == epage) {
|
|
bufhead = readw(ofsAddr + Ofs_txb);
|
|
writew(spage, baseAddr + Control_reg);
|
|
while (c > 0) {
|
|
if (head > tail)
|
|
len = head - tail - 1;
|
|
else
|
|
len = tx_mask + 1 - tail;
|
|
len = (c > len) ? len : c;
|
|
ofs = baseAddr + DynPage_addr + bufhead + tail;
|
|
memcpy_toio(ofs, buffer, len);
|
|
buffer += len;
|
|
tail = (tail + len) & tx_mask;
|
|
c -= len;
|
|
}
|
|
} else {
|
|
pageno = spage + (tail >> 13);
|
|
pageofs = tail & Page_mask;
|
|
while (c > 0) {
|
|
len = Page_size - pageofs;
|
|
if (len > c)
|
|
len = c;
|
|
writeb(pageno, baseAddr + Control_reg);
|
|
ofs = baseAddr + DynPage_addr + pageofs;
|
|
memcpy_toio(ofs, buffer, len);
|
|
buffer += len;
|
|
if (++pageno == epage)
|
|
pageno = spage;
|
|
pageofs = 0;
|
|
c -= len;
|
|
}
|
|
tail = (tail + total) & tx_mask;
|
|
}
|
|
writew(tail, ofsAddr + TXwptr);
|
|
writeb(1, ofsAddr + CD180TXirq); /* start to send */
|
|
return total;
|
|
}
|
|
|
|
static int MoxaPortReadData(struct moxa_port *port)
|
|
{
|
|
struct tty_struct *tty = port->port.tty;
|
|
unsigned char *dst;
|
|
void __iomem *baseAddr, *ofsAddr, *ofs;
|
|
unsigned int count, len, total;
|
|
u16 tail, rx_mask, spage, epage;
|
|
u16 pageno, pageofs, bufhead, head;
|
|
|
|
ofsAddr = port->tableAddr;
|
|
baseAddr = port->board->basemem;
|
|
head = readw(ofsAddr + RXrptr);
|
|
tail = readw(ofsAddr + RXwptr);
|
|
rx_mask = readw(ofsAddr + RX_mask);
|
|
spage = readw(ofsAddr + Page_rxb);
|
|
epage = readw(ofsAddr + EndPage_rxb);
|
|
count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
|
|
if (count == 0)
|
|
return 0;
|
|
|
|
total = count;
|
|
moxaLog.rxcnt[tty->index] += total;
|
|
if (spage == epage) {
|
|
bufhead = readw(ofsAddr + Ofs_rxb);
|
|
writew(spage, baseAddr + Control_reg);
|
|
while (count > 0) {
|
|
ofs = baseAddr + DynPage_addr + bufhead + head;
|
|
len = (tail >= head) ? (tail - head) :
|
|
(rx_mask + 1 - head);
|
|
len = tty_prepare_flip_string(&port->port, &dst,
|
|
min(len, count));
|
|
memcpy_fromio(dst, ofs, len);
|
|
head = (head + len) & rx_mask;
|
|
count -= len;
|
|
}
|
|
} else {
|
|
pageno = spage + (head >> 13);
|
|
pageofs = head & Page_mask;
|
|
while (count > 0) {
|
|
writew(pageno, baseAddr + Control_reg);
|
|
ofs = baseAddr + DynPage_addr + pageofs;
|
|
len = tty_prepare_flip_string(&port->port, &dst,
|
|
min(Page_size - pageofs, count));
|
|
memcpy_fromio(dst, ofs, len);
|
|
|
|
count -= len;
|
|
pageofs = (pageofs + len) & Page_mask;
|
|
if (pageofs == 0 && ++pageno == epage)
|
|
pageno = spage;
|
|
}
|
|
head = (head + total) & rx_mask;
|
|
}
|
|
writew(head, ofsAddr + RXrptr);
|
|
if (readb(ofsAddr + FlagStat) & Xoff_state) {
|
|
moxaLowWaterChk = 1;
|
|
port->lowChkFlag = 1;
|
|
}
|
|
return total;
|
|
}
|
|
|
|
|
|
static int MoxaPortTxQueue(struct moxa_port *port)
|
|
{
|
|
void __iomem *ofsAddr = port->tableAddr;
|
|
u16 rptr, wptr, mask;
|
|
|
|
rptr = readw(ofsAddr + TXrptr);
|
|
wptr = readw(ofsAddr + TXwptr);
|
|
mask = readw(ofsAddr + TX_mask);
|
|
return (wptr - rptr) & mask;
|
|
}
|
|
|
|
static int MoxaPortTxFree(struct moxa_port *port)
|
|
{
|
|
void __iomem *ofsAddr = port->tableAddr;
|
|
u16 rptr, wptr, mask;
|
|
|
|
rptr = readw(ofsAddr + TXrptr);
|
|
wptr = readw(ofsAddr + TXwptr);
|
|
mask = readw(ofsAddr + TX_mask);
|
|
return mask - ((wptr - rptr) & mask);
|
|
}
|
|
|
|
static int MoxaPortRxQueue(struct moxa_port *port)
|
|
{
|
|
void __iomem *ofsAddr = port->tableAddr;
|
|
u16 rptr, wptr, mask;
|
|
|
|
rptr = readw(ofsAddr + RXrptr);
|
|
wptr = readw(ofsAddr + RXwptr);
|
|
mask = readw(ofsAddr + RX_mask);
|
|
return (wptr - rptr) & mask;
|
|
}
|
|
|
|
static void MoxaPortTxDisable(struct moxa_port *port)
|
|
{
|
|
moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
|
|
}
|
|
|
|
static void MoxaPortTxEnable(struct moxa_port *port)
|
|
{
|
|
moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
|
|
}
|
|
|
|
static int moxa_get_serial_info(struct moxa_port *info,
|
|
struct serial_struct __user *retinfo)
|
|
{
|
|
struct serial_struct tmp = {
|
|
.type = info->type,
|
|
.line = info->port.tty->index,
|
|
.flags = info->port.flags,
|
|
.baud_base = 921600,
|
|
.close_delay = info->port.close_delay
|
|
};
|
|
return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
|
|
}
|
|
|
|
|
|
static int moxa_set_serial_info(struct moxa_port *info,
|
|
struct serial_struct __user *new_info)
|
|
{
|
|
struct serial_struct new_serial;
|
|
|
|
if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
|
|
return -EFAULT;
|
|
|
|
if (new_serial.irq != 0 || new_serial.port != 0 ||
|
|
new_serial.custom_divisor != 0 ||
|
|
new_serial.baud_base != 921600)
|
|
return -EPERM;
|
|
|
|
if (!capable(CAP_SYS_ADMIN)) {
|
|
if (((new_serial.flags & ~ASYNC_USR_MASK) !=
|
|
(info->port.flags & ~ASYNC_USR_MASK)))
|
|
return -EPERM;
|
|
} else
|
|
info->port.close_delay = new_serial.close_delay * HZ / 100;
|
|
|
|
new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
|
|
new_serial.flags |= (info->port.flags & ASYNC_FLAGS);
|
|
|
|
MoxaSetFifo(info, new_serial.type == PORT_16550A);
|
|
|
|
info->type = new_serial.type;
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
/*****************************************************************************
|
|
* Static local functions: *
|
|
*****************************************************************************/
|
|
|
|
static void MoxaSetFifo(struct moxa_port *port, int enable)
|
|
{
|
|
void __iomem *ofsAddr = port->tableAddr;
|
|
|
|
if (!enable) {
|
|
moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
|
|
moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
|
|
} else {
|
|
moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
|
|
moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
|
|
}
|
|
}
|