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2097 lines
52 KiB
2097 lines
52 KiB
// SPDX-License-Identifier: GPL-2.0+ |
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/*****************************************************************************/ |
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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 ([email protected]). |
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* Copyright (c) 2007 Jiri Slaby <[email protected]> |
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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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/* |
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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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|
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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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|
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#include <asm/io.h> |
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#include <linux/uaccess.h> |
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|
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#include "moxa.h" |
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|
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#define MOXA_VERSION "6.0k" |
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|
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#define MOXA_FW_HDRLEN 32 |
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|
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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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|
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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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|
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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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|
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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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|
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#ifdef CONFIG_PCI |
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static const 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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|
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struct moxa_port; |
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|
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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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|
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unsigned int ready; |
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|
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struct moxa_port *ports; |
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|
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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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|
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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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|
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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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|
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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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|
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int type; |
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int cflag; |
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unsigned long statusflags; |
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|
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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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|
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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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|
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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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|
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|
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#define WAKEUP_CHARS 256 |
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|
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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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|
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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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|
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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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|
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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_hw_array(baseaddr, ulong, ioport, 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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|
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module_param(ttymajor, int, 0); |
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|
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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 unsigned int moxa_write_room(struct tty_struct *); |
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static void moxa_flush_buffer(struct tty_struct *); |
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static unsigned 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(struct timer_list *); |
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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 unsigned int MoxaPortTxQueue(struct moxa_port *); |
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static int MoxaPortRxQueue(struct moxa_port *); |
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static unsigned 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 tty_struct *, struct serial_struct *); |
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static int moxa_set_serial_info(struct tty_struct *, struct serial_struct *); |
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static void MoxaSetFifo(struct moxa_port *port, int enable); |
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|
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/* |
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* I/O functions |
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*/ |
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|
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static DEFINE_SPINLOCK(moxafunc_lock); |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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/* |
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* TTY operations |
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*/ |
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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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|
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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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|
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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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|
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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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break; |
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} |
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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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.set_serial = moxa_set_serial_info, |
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.get_serial = moxa_get_serial_info, |
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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); |
|
|
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/* |
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* HW init |
|
*/ |
|
|
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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: |
|
if (model != 1) |
|
goto err; |
|
break; |
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case MOXA_BOARD_CP204J: |
|
if (model != 3) |
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goto err; |
|
break; |
|
default: |
|
if (model != 2) |
|
goto err; |
|
break; |
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} |
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return 0; |
|
err: |
|
return -EINVAL; |
|
} |
|
|
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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)) |
|
return -EINVAL; |
|
|
|
return 0; |
|
} |
|
|
|
static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf, |
|
size_t len) |
|
{ |
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void __iomem *baseAddr = brd->basemem; |
|
u16 tmp; |
|
|
|
writeb(HW_reset, baseAddr + Control_reg); /* reset */ |
|
msleep(10); |
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memset_io(baseAddr, 0, 4096); |
|
memcpy_toio(baseAddr, buf, len); /* download BIOS */ |
|
writeb(0, baseAddr + Control_reg); /* restart */ |
|
|
|
msleep(2000); |
|
|
|
switch (brd->boardType) { |
|
case MOXA_BOARD_C218_ISA: |
|
case MOXA_BOARD_C218_PCI: |
|
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 (tty_port_initialized(&brd->ports[a].port)) |
|
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 (tty_port_initialized(&brd->ports[a].port)) |
|
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(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"); |
|
tty_driver_kref_put(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(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); |
|
|
|
tty_unregister_driver(moxaDriver); |
|
tty_driver_kref_put(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 (!tty_port_initialized(&ch->port)) { |
|
ch->statusflags = 0; |
|
moxa_set_tty_param(tty, &tty->termios); |
|
MoxaPortLineCtrl(ch, 1, 1); |
|
MoxaPortEnable(ch); |
|
MoxaSetFifo(ch, ch->type == PORT_16550A); |
|
tty_port_set_initialized(&ch->port, 1); |
|
} |
|
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 unsigned int moxa_write_room(struct tty_struct *tty) |
|
{ |
|
struct moxa_port *ch; |
|
|
|
if (tty->flow.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 unsigned int moxa_chars_in_buffer(struct tty_struct *tty) |
|
{ |
|
struct moxa_port *ch = tty->driver_data; |
|
unsigned 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 = tty_port_initialized(&p->port); |
|
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->flow.stopped && |
|
MoxaPortTxQueue(p) <= WAKEUP_CHARS) { |
|
clear_bit(LOWWAIT, &p->statusflags); |
|
tty_wakeup(tty); |
|
} |
|
|
|
if (inited && !tty_throttled(tty) && |
|
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(struct timer_list *unused) |
|
{ |
|
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; |
|
|
|
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) { |
|
if (termio->c_cflag & CMSPAR) |
|
mode |= MX_PARMARK; |
|
else |
|
mode |= MX_PARODD; |
|
} else { |
|
if (termio->c_cflag & CMSPAR) |
|
mode |= MX_PARSPACE; |
|
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 unsigned 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 unsigned 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 tty_struct *tty, |
|
struct serial_struct *ss) |
|
{ |
|
struct moxa_port *info = tty->driver_data; |
|
|
|
if (tty->index == MAX_PORTS) |
|
return -EINVAL; |
|
if (!info) |
|
return -ENODEV; |
|
mutex_lock(&info->port.mutex); |
|
ss->type = info->type; |
|
ss->line = info->port.tty->index; |
|
ss->flags = info->port.flags; |
|
ss->baud_base = 921600; |
|
ss->close_delay = jiffies_to_msecs(info->port.close_delay) / 10; |
|
mutex_unlock(&info->port.mutex); |
|
return 0; |
|
} |
|
|
|
|
|
static int moxa_set_serial_info(struct tty_struct *tty, |
|
struct serial_struct *ss) |
|
{ |
|
struct moxa_port *info = tty->driver_data; |
|
unsigned int close_delay; |
|
|
|
if (tty->index == MAX_PORTS) |
|
return -EINVAL; |
|
if (!info) |
|
return -ENODEV; |
|
|
|
close_delay = msecs_to_jiffies(ss->close_delay * 10); |
|
|
|
mutex_lock(&info->port.mutex); |
|
if (!capable(CAP_SYS_ADMIN)) { |
|
if (close_delay != info->port.close_delay || |
|
ss->type != info->type || |
|
((ss->flags & ~ASYNC_USR_MASK) != |
|
(info->port.flags & ~ASYNC_USR_MASK))) { |
|
mutex_unlock(&info->port.mutex); |
|
return -EPERM; |
|
} |
|
} else { |
|
info->port.close_delay = close_delay; |
|
|
|
MoxaSetFifo(info, ss->type == PORT_16550A); |
|
|
|
info->type = ss->type; |
|
} |
|
mutex_unlock(&info->port.mutex); |
|
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); |
|
} |
|
}
|
|
|