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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-06 01:06:41 +07:00
f21ec3d2d4
In most of the time, the driver needs to check if the cts flow control is enabled. But now, the driver checks the ASYNC_CTS_FLOW flag manually, which is not a grace way. So add a new wraper function to make the code tidy and clean. Signed-off-by: Huang Shijie <shijie8@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2770 lines
70 KiB
C
2770 lines
70 KiB
C
/*
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* mxser.c -- MOXA Smartio/Industio family multiport serial driver.
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*
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* Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com).
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* Copyright (C) 2006-2008 Jiri Slaby <jirislaby@gmail.com>
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*
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* This code is loosely based on the 1.8 moxa driver which is based on
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* Linux serial driver, written by Linus Torvalds, Theodore T'so and
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* 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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* Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
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* <alan@lxorguk.ukuu.org.uk>. The original 1.8 code is available on
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* www.moxa.com.
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* - Fixed x86_64 cleanness
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*/
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#include <linux/module.h>
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#include <linux/errno.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/serial.h>
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#include <linux/serial_reg.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/ioport.h>
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#include <linux/mm.h>
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#include <linux/delay.h>
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#include <linux/pci.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/irq.h>
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#include <asm/uaccess.h>
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#include "mxser.h"
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#define MXSER_VERSION "2.0.5" /* 1.14 */
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#define MXSERMAJOR 174
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#define MXSER_BOARDS 4 /* Max. boards */
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#define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
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#define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
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#define MXSER_ISR_PASS_LIMIT 100
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/*CheckIsMoxaMust return value*/
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#define MOXA_OTHER_UART 0x00
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#define MOXA_MUST_MU150_HWID 0x01
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#define MOXA_MUST_MU860_HWID 0x02
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#define WAKEUP_CHARS 256
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#define UART_MCR_AFE 0x20
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#define UART_LSR_SPECIAL 0x1E
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#define PCI_DEVICE_ID_POS104UL 0x1044
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#define PCI_DEVICE_ID_CB108 0x1080
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#define PCI_DEVICE_ID_CP102UF 0x1023
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#define PCI_DEVICE_ID_CP112UL 0x1120
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#define PCI_DEVICE_ID_CB114 0x1142
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#define PCI_DEVICE_ID_CP114UL 0x1143
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#define PCI_DEVICE_ID_CB134I 0x1341
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#define PCI_DEVICE_ID_CP138U 0x1380
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#define C168_ASIC_ID 1
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#define C104_ASIC_ID 2
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#define C102_ASIC_ID 0xB
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#define CI132_ASIC_ID 4
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#define CI134_ASIC_ID 3
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#define CI104J_ASIC_ID 5
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#define MXSER_HIGHBAUD 1
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#define MXSER_HAS2 2
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/* This is only for PCI */
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static const struct {
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int type;
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int tx_fifo;
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int rx_fifo;
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int xmit_fifo_size;
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int rx_high_water;
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int rx_trigger;
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int rx_low_water;
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long max_baud;
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} Gpci_uart_info[] = {
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{MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
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{MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
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{MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
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};
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#define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
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struct mxser_cardinfo {
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char *name;
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unsigned int nports;
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unsigned int flags;
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};
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static const struct mxser_cardinfo mxser_cards[] = {
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/* 0*/ { "C168 series", 8, },
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{ "C104 series", 4, },
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{ "CI-104J series", 4, },
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{ "C168H/PCI series", 8, },
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{ "C104H/PCI series", 4, },
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/* 5*/ { "C102 series", 4, MXSER_HAS2 }, /* C102-ISA */
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{ "CI-132 series", 4, MXSER_HAS2 },
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{ "CI-134 series", 4, },
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{ "CP-132 series", 2, },
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{ "CP-114 series", 4, },
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/*10*/ { "CT-114 series", 4, },
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{ "CP-102 series", 2, MXSER_HIGHBAUD },
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{ "CP-104U series", 4, },
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{ "CP-168U series", 8, },
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{ "CP-132U series", 2, },
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/*15*/ { "CP-134U series", 4, },
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{ "CP-104JU series", 4, },
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{ "Moxa UC7000 Serial", 8, }, /* RC7000 */
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{ "CP-118U series", 8, },
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{ "CP-102UL series", 2, },
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/*20*/ { "CP-102U series", 2, },
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{ "CP-118EL series", 8, },
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{ "CP-168EL series", 8, },
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{ "CP-104EL series", 4, },
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{ "CB-108 series", 8, },
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/*25*/ { "CB-114 series", 4, },
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{ "CB-134I series", 4, },
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{ "CP-138U series", 8, },
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{ "POS-104UL series", 4, },
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{ "CP-114UL series", 4, },
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/*30*/ { "CP-102UF series", 2, },
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{ "CP-112UL series", 2, },
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};
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/* driver_data correspond to the lines in the structure above
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see also ISA probe function before you change something */
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static struct pci_device_id mxser_pcibrds[] = {
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108), .driver_data = 24 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114), .driver_data = 25 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I), .driver_data = 26 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U), .driver_data = 27 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL), .driver_data = 28 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP102UF), .driver_data = 30 },
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{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP112UL), .driver_data = 31 },
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{ }
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};
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MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
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static unsigned long ioaddr[MXSER_BOARDS];
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static int ttymajor = MXSERMAJOR;
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/* Variables for insmod */
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MODULE_AUTHOR("Casper Yang");
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MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
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module_param_array(ioaddr, ulong, NULL, 0);
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MODULE_PARM_DESC(ioaddr, "ISA io addresses to look for a moxa board");
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module_param(ttymajor, int, 0);
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MODULE_LICENSE("GPL");
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struct mxser_log {
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int tick;
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unsigned long rxcnt[MXSER_PORTS];
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unsigned long txcnt[MXSER_PORTS];
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};
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struct mxser_mon {
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unsigned long rxcnt;
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unsigned long txcnt;
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unsigned long up_rxcnt;
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unsigned long up_txcnt;
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int modem_status;
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unsigned char hold_reason;
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};
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struct mxser_mon_ext {
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unsigned long rx_cnt[32];
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unsigned long tx_cnt[32];
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unsigned long up_rxcnt[32];
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unsigned long up_txcnt[32];
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int modem_status[32];
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long baudrate[32];
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int databits[32];
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int stopbits[32];
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int parity[32];
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int flowctrl[32];
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int fifo[32];
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int iftype[32];
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};
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struct mxser_board;
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struct mxser_port {
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struct tty_port port;
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struct mxser_board *board;
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unsigned long ioaddr;
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unsigned long opmode_ioaddr;
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int max_baud;
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int rx_high_water;
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int rx_trigger; /* Rx fifo trigger level */
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int rx_low_water;
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int baud_base; /* max. speed */
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int type; /* UART type */
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int x_char; /* xon/xoff character */
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int IER; /* Interrupt Enable Register */
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int MCR; /* Modem control register */
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unsigned char stop_rx;
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unsigned char ldisc_stop_rx;
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int custom_divisor;
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unsigned char err_shadow;
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struct async_icount icount; /* kernel counters for 4 input interrupts */
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int timeout;
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int read_status_mask;
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int ignore_status_mask;
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int xmit_fifo_size;
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int xmit_head;
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int xmit_tail;
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int xmit_cnt;
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struct ktermios normal_termios;
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struct mxser_mon mon_data;
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spinlock_t slock;
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};
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struct mxser_board {
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unsigned int idx;
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int irq;
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const struct mxser_cardinfo *info;
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unsigned long vector;
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unsigned long vector_mask;
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int chip_flag;
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int uart_type;
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struct mxser_port ports[MXSER_PORTS_PER_BOARD];
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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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static struct mxser_board mxser_boards[MXSER_BOARDS];
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static struct tty_driver *mxvar_sdriver;
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static struct mxser_log mxvar_log;
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static int mxser_set_baud_method[MXSER_PORTS + 1];
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static void mxser_enable_must_enchance_mode(unsigned long baseio)
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{
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u8 oldlcr;
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u8 efr;
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oldlcr = inb(baseio + UART_LCR);
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outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
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efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
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efr |= MOXA_MUST_EFR_EFRB_ENABLE;
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outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
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outb(oldlcr, baseio + UART_LCR);
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}
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#ifdef CONFIG_PCI
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static void mxser_disable_must_enchance_mode(unsigned long baseio)
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{
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u8 oldlcr;
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u8 efr;
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oldlcr = inb(baseio + UART_LCR);
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outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
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efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
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efr &= ~MOXA_MUST_EFR_EFRB_ENABLE;
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outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
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outb(oldlcr, baseio + UART_LCR);
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}
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#endif
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static void mxser_set_must_xon1_value(unsigned long baseio, u8 value)
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{
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u8 oldlcr;
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u8 efr;
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oldlcr = inb(baseio + UART_LCR);
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outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
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efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
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efr &= ~MOXA_MUST_EFR_BANK_MASK;
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efr |= MOXA_MUST_EFR_BANK0;
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outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
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outb(value, baseio + MOXA_MUST_XON1_REGISTER);
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outb(oldlcr, baseio + UART_LCR);
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}
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static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value)
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{
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u8 oldlcr;
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u8 efr;
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oldlcr = inb(baseio + UART_LCR);
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outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
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efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
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efr &= ~MOXA_MUST_EFR_BANK_MASK;
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efr |= MOXA_MUST_EFR_BANK0;
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outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
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outb(value, baseio + MOXA_MUST_XOFF1_REGISTER);
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outb(oldlcr, baseio + UART_LCR);
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}
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static void mxser_set_must_fifo_value(struct mxser_port *info)
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{
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u8 oldlcr;
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u8 efr;
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oldlcr = inb(info->ioaddr + UART_LCR);
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outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR);
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efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER);
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efr &= ~MOXA_MUST_EFR_BANK_MASK;
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efr |= MOXA_MUST_EFR_BANK1;
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outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER);
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outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER);
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outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER);
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outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER);
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outb(oldlcr, info->ioaddr + UART_LCR);
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}
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static void mxser_set_must_enum_value(unsigned long baseio, u8 value)
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{
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u8 oldlcr;
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u8 efr;
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oldlcr = inb(baseio + UART_LCR);
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outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
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efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
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efr &= ~MOXA_MUST_EFR_BANK_MASK;
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efr |= MOXA_MUST_EFR_BANK2;
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outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
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outb(value, baseio + MOXA_MUST_ENUM_REGISTER);
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outb(oldlcr, baseio + UART_LCR);
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}
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#ifdef CONFIG_PCI
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static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId)
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{
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u8 oldlcr;
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u8 efr;
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oldlcr = inb(baseio + UART_LCR);
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outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
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efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
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efr &= ~MOXA_MUST_EFR_BANK_MASK;
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efr |= MOXA_MUST_EFR_BANK2;
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outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
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*pId = inb(baseio + MOXA_MUST_HWID_REGISTER);
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outb(oldlcr, baseio + UART_LCR);
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}
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#endif
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static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio)
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{
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u8 oldlcr;
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u8 efr;
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oldlcr = inb(baseio + UART_LCR);
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outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
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efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
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efr &= ~MOXA_MUST_EFR_SF_MASK;
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outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
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outb(oldlcr, baseio + UART_LCR);
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}
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static void mxser_enable_must_tx_software_flow_control(unsigned long baseio)
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{
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u8 oldlcr;
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u8 efr;
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oldlcr = inb(baseio + UART_LCR);
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outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
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efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
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efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
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efr |= MOXA_MUST_EFR_SF_TX1;
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|
|
outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
|
|
outb(oldlcr, baseio + UART_LCR);
|
|
}
|
|
|
|
static void mxser_disable_must_tx_software_flow_control(unsigned long baseio)
|
|
{
|
|
u8 oldlcr;
|
|
u8 efr;
|
|
|
|
oldlcr = inb(baseio + UART_LCR);
|
|
outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
|
|
|
|
efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
|
|
efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
|
|
|
|
outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
|
|
outb(oldlcr, baseio + UART_LCR);
|
|
}
|
|
|
|
static void mxser_enable_must_rx_software_flow_control(unsigned long baseio)
|
|
{
|
|
u8 oldlcr;
|
|
u8 efr;
|
|
|
|
oldlcr = inb(baseio + UART_LCR);
|
|
outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
|
|
|
|
efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
|
|
efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
|
|
efr |= MOXA_MUST_EFR_SF_RX1;
|
|
|
|
outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
|
|
outb(oldlcr, baseio + UART_LCR);
|
|
}
|
|
|
|
static void mxser_disable_must_rx_software_flow_control(unsigned long baseio)
|
|
{
|
|
u8 oldlcr;
|
|
u8 efr;
|
|
|
|
oldlcr = inb(baseio + UART_LCR);
|
|
outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
|
|
|
|
efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
|
|
efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
|
|
|
|
outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
|
|
outb(oldlcr, baseio + UART_LCR);
|
|
}
|
|
|
|
#ifdef CONFIG_PCI
|
|
static int __devinit CheckIsMoxaMust(unsigned long io)
|
|
{
|
|
u8 oldmcr, hwid;
|
|
int i;
|
|
|
|
outb(0, io + UART_LCR);
|
|
mxser_disable_must_enchance_mode(io);
|
|
oldmcr = inb(io + UART_MCR);
|
|
outb(0, io + UART_MCR);
|
|
mxser_set_must_xon1_value(io, 0x11);
|
|
if ((hwid = inb(io + UART_MCR)) != 0) {
|
|
outb(oldmcr, io + UART_MCR);
|
|
return MOXA_OTHER_UART;
|
|
}
|
|
|
|
mxser_get_must_hardware_id(io, &hwid);
|
|
for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
|
|
if (hwid == Gpci_uart_info[i].type)
|
|
return (int)hwid;
|
|
}
|
|
return MOXA_OTHER_UART;
|
|
}
|
|
#endif
|
|
|
|
static void process_txrx_fifo(struct mxser_port *info)
|
|
{
|
|
int i;
|
|
|
|
if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
|
|
info->rx_trigger = 1;
|
|
info->rx_high_water = 1;
|
|
info->rx_low_water = 1;
|
|
info->xmit_fifo_size = 1;
|
|
} else
|
|
for (i = 0; i < UART_INFO_NUM; i++)
|
|
if (info->board->chip_flag == Gpci_uart_info[i].type) {
|
|
info->rx_trigger = Gpci_uart_info[i].rx_trigger;
|
|
info->rx_low_water = Gpci_uart_info[i].rx_low_water;
|
|
info->rx_high_water = Gpci_uart_info[i].rx_high_water;
|
|
info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
|
|
{
|
|
static unsigned char mxser_msr[MXSER_PORTS + 1];
|
|
unsigned char status = 0;
|
|
|
|
status = inb(baseaddr + UART_MSR);
|
|
|
|
mxser_msr[port] &= 0x0F;
|
|
mxser_msr[port] |= status;
|
|
status = mxser_msr[port];
|
|
if (mode)
|
|
mxser_msr[port] = 0;
|
|
|
|
return status;
|
|
}
|
|
|
|
static int mxser_carrier_raised(struct tty_port *port)
|
|
{
|
|
struct mxser_port *mp = container_of(port, struct mxser_port, port);
|
|
return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0;
|
|
}
|
|
|
|
static void mxser_dtr_rts(struct tty_port *port, int on)
|
|
{
|
|
struct mxser_port *mp = container_of(port, struct mxser_port, port);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&mp->slock, flags);
|
|
if (on)
|
|
outb(inb(mp->ioaddr + UART_MCR) |
|
|
UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
|
|
else
|
|
outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS),
|
|
mp->ioaddr + UART_MCR);
|
|
spin_unlock_irqrestore(&mp->slock, flags);
|
|
}
|
|
|
|
static int mxser_set_baud(struct tty_struct *tty, long newspd)
|
|
{
|
|
struct mxser_port *info = tty->driver_data;
|
|
int quot = 0, baud;
|
|
unsigned char cval;
|
|
|
|
if (!info->ioaddr)
|
|
return -1;
|
|
|
|
if (newspd > info->max_baud)
|
|
return -1;
|
|
|
|
if (newspd == 134) {
|
|
quot = 2 * info->baud_base / 269;
|
|
tty_encode_baud_rate(tty, 134, 134);
|
|
} else if (newspd) {
|
|
quot = info->baud_base / newspd;
|
|
if (quot == 0)
|
|
quot = 1;
|
|
baud = info->baud_base/quot;
|
|
tty_encode_baud_rate(tty, baud, baud);
|
|
} else {
|
|
quot = 0;
|
|
}
|
|
|
|
info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
|
|
info->timeout += HZ / 50; /* Add .02 seconds of slop */
|
|
|
|
if (quot) {
|
|
info->MCR |= UART_MCR_DTR;
|
|
outb(info->MCR, info->ioaddr + UART_MCR);
|
|
} else {
|
|
info->MCR &= ~UART_MCR_DTR;
|
|
outb(info->MCR, info->ioaddr + UART_MCR);
|
|
return 0;
|
|
}
|
|
|
|
cval = inb(info->ioaddr + UART_LCR);
|
|
|
|
outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
|
|
|
|
outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
|
|
outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
|
|
outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
|
|
|
|
#ifdef BOTHER
|
|
if (C_BAUD(tty) == BOTHER) {
|
|
quot = info->baud_base % newspd;
|
|
quot *= 8;
|
|
if (quot % newspd > newspd / 2) {
|
|
quot /= newspd;
|
|
quot++;
|
|
} else
|
|
quot /= newspd;
|
|
|
|
mxser_set_must_enum_value(info->ioaddr, quot);
|
|
} else
|
|
#endif
|
|
mxser_set_must_enum_value(info->ioaddr, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This routine is called to set the UART divisor registers to match
|
|
* the specified baud rate for a serial port.
|
|
*/
|
|
static int mxser_change_speed(struct tty_struct *tty,
|
|
struct ktermios *old_termios)
|
|
{
|
|
struct mxser_port *info = tty->driver_data;
|
|
unsigned cflag, cval, fcr;
|
|
int ret = 0;
|
|
unsigned char status;
|
|
|
|
cflag = tty->termios.c_cflag;
|
|
if (!info->ioaddr)
|
|
return ret;
|
|
|
|
if (mxser_set_baud_method[tty->index] == 0)
|
|
mxser_set_baud(tty, tty_get_baud_rate(tty));
|
|
|
|
/* byte size and parity */
|
|
switch (cflag & CSIZE) {
|
|
case CS5:
|
|
cval = 0x00;
|
|
break;
|
|
case CS6:
|
|
cval = 0x01;
|
|
break;
|
|
case CS7:
|
|
cval = 0x02;
|
|
break;
|
|
case CS8:
|
|
cval = 0x03;
|
|
break;
|
|
default:
|
|
cval = 0x00;
|
|
break; /* too keep GCC shut... */
|
|
}
|
|
if (cflag & CSTOPB)
|
|
cval |= 0x04;
|
|
if (cflag & PARENB)
|
|
cval |= UART_LCR_PARITY;
|
|
if (!(cflag & PARODD))
|
|
cval |= UART_LCR_EPAR;
|
|
if (cflag & CMSPAR)
|
|
cval |= UART_LCR_SPAR;
|
|
|
|
if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
|
|
if (info->board->chip_flag) {
|
|
fcr = UART_FCR_ENABLE_FIFO;
|
|
fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
|
|
mxser_set_must_fifo_value(info);
|
|
} else
|
|
fcr = 0;
|
|
} else {
|
|
fcr = UART_FCR_ENABLE_FIFO;
|
|
if (info->board->chip_flag) {
|
|
fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
|
|
mxser_set_must_fifo_value(info);
|
|
} else {
|
|
switch (info->rx_trigger) {
|
|
case 1:
|
|
fcr |= UART_FCR_TRIGGER_1;
|
|
break;
|
|
case 4:
|
|
fcr |= UART_FCR_TRIGGER_4;
|
|
break;
|
|
case 8:
|
|
fcr |= UART_FCR_TRIGGER_8;
|
|
break;
|
|
default:
|
|
fcr |= UART_FCR_TRIGGER_14;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* CTS flow control flag and modem status interrupts */
|
|
info->IER &= ~UART_IER_MSI;
|
|
info->MCR &= ~UART_MCR_AFE;
|
|
if (cflag & CRTSCTS) {
|
|
info->port.flags |= ASYNC_CTS_FLOW;
|
|
info->IER |= UART_IER_MSI;
|
|
if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
|
|
info->MCR |= UART_MCR_AFE;
|
|
} else {
|
|
status = inb(info->ioaddr + UART_MSR);
|
|
if (tty->hw_stopped) {
|
|
if (status & UART_MSR_CTS) {
|
|
tty->hw_stopped = 0;
|
|
if (info->type != PORT_16550A &&
|
|
!info->board->chip_flag) {
|
|
outb(info->IER & ~UART_IER_THRI,
|
|
info->ioaddr +
|
|
UART_IER);
|
|
info->IER |= UART_IER_THRI;
|
|
outb(info->IER, info->ioaddr +
|
|
UART_IER);
|
|
}
|
|
tty_wakeup(tty);
|
|
}
|
|
} else {
|
|
if (!(status & UART_MSR_CTS)) {
|
|
tty->hw_stopped = 1;
|
|
if ((info->type != PORT_16550A) &&
|
|
(!info->board->chip_flag)) {
|
|
info->IER &= ~UART_IER_THRI;
|
|
outb(info->IER, info->ioaddr +
|
|
UART_IER);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
info->port.flags &= ~ASYNC_CTS_FLOW;
|
|
}
|
|
outb(info->MCR, info->ioaddr + UART_MCR);
|
|
if (cflag & CLOCAL) {
|
|
info->port.flags &= ~ASYNC_CHECK_CD;
|
|
} else {
|
|
info->port.flags |= ASYNC_CHECK_CD;
|
|
info->IER |= UART_IER_MSI;
|
|
}
|
|
outb(info->IER, info->ioaddr + UART_IER);
|
|
|
|
/*
|
|
* Set up parity check flag
|
|
*/
|
|
info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
|
|
if (I_INPCK(tty))
|
|
info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
|
|
if (I_BRKINT(tty) || I_PARMRK(tty))
|
|
info->read_status_mask |= UART_LSR_BI;
|
|
|
|
info->ignore_status_mask = 0;
|
|
|
|
if (I_IGNBRK(tty)) {
|
|
info->ignore_status_mask |= UART_LSR_BI;
|
|
info->read_status_mask |= UART_LSR_BI;
|
|
/*
|
|
* If we're ignore parity and break indicators, ignore
|
|
* overruns too. (For real raw support).
|
|
*/
|
|
if (I_IGNPAR(tty)) {
|
|
info->ignore_status_mask |=
|
|
UART_LSR_OE |
|
|
UART_LSR_PE |
|
|
UART_LSR_FE;
|
|
info->read_status_mask |=
|
|
UART_LSR_OE |
|
|
UART_LSR_PE |
|
|
UART_LSR_FE;
|
|
}
|
|
}
|
|
if (info->board->chip_flag) {
|
|
mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty));
|
|
mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty));
|
|
if (I_IXON(tty)) {
|
|
mxser_enable_must_rx_software_flow_control(
|
|
info->ioaddr);
|
|
} else {
|
|
mxser_disable_must_rx_software_flow_control(
|
|
info->ioaddr);
|
|
}
|
|
if (I_IXOFF(tty)) {
|
|
mxser_enable_must_tx_software_flow_control(
|
|
info->ioaddr);
|
|
} else {
|
|
mxser_disable_must_tx_software_flow_control(
|
|
info->ioaddr);
|
|
}
|
|
}
|
|
|
|
|
|
outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
|
|
outb(cval, info->ioaddr + UART_LCR);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void mxser_check_modem_status(struct tty_struct *tty,
|
|
struct mxser_port *port, int status)
|
|
{
|
|
/* update input line counters */
|
|
if (status & UART_MSR_TERI)
|
|
port->icount.rng++;
|
|
if (status & UART_MSR_DDSR)
|
|
port->icount.dsr++;
|
|
if (status & UART_MSR_DDCD)
|
|
port->icount.dcd++;
|
|
if (status & UART_MSR_DCTS)
|
|
port->icount.cts++;
|
|
port->mon_data.modem_status = status;
|
|
wake_up_interruptible(&port->port.delta_msr_wait);
|
|
|
|
if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
|
|
if (status & UART_MSR_DCD)
|
|
wake_up_interruptible(&port->port.open_wait);
|
|
}
|
|
|
|
if (tty_port_cts_enabled(&port->port)) {
|
|
if (tty->hw_stopped) {
|
|
if (status & UART_MSR_CTS) {
|
|
tty->hw_stopped = 0;
|
|
|
|
if ((port->type != PORT_16550A) &&
|
|
(!port->board->chip_flag)) {
|
|
outb(port->IER & ~UART_IER_THRI,
|
|
port->ioaddr + UART_IER);
|
|
port->IER |= UART_IER_THRI;
|
|
outb(port->IER, port->ioaddr +
|
|
UART_IER);
|
|
}
|
|
tty_wakeup(tty);
|
|
}
|
|
} else {
|
|
if (!(status & UART_MSR_CTS)) {
|
|
tty->hw_stopped = 1;
|
|
if (port->type != PORT_16550A &&
|
|
!port->board->chip_flag) {
|
|
port->IER &= ~UART_IER_THRI;
|
|
outb(port->IER, port->ioaddr +
|
|
UART_IER);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static int mxser_activate(struct tty_port *port, struct tty_struct *tty)
|
|
{
|
|
struct mxser_port *info = container_of(port, struct mxser_port, port);
|
|
unsigned long page;
|
|
unsigned long flags;
|
|
|
|
page = __get_free_page(GFP_KERNEL);
|
|
if (!page)
|
|
return -ENOMEM;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
|
|
if (!info->ioaddr || !info->type) {
|
|
set_bit(TTY_IO_ERROR, &tty->flags);
|
|
free_page(page);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
return 0;
|
|
}
|
|
info->port.xmit_buf = (unsigned char *) page;
|
|
|
|
/*
|
|
* Clear the FIFO buffers and disable them
|
|
* (they will be reenabled in mxser_change_speed())
|
|
*/
|
|
if (info->board->chip_flag)
|
|
outb((UART_FCR_CLEAR_RCVR |
|
|
UART_FCR_CLEAR_XMIT |
|
|
MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
|
|
else
|
|
outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
|
|
info->ioaddr + UART_FCR);
|
|
|
|
/*
|
|
* At this point there's no way the LSR could still be 0xFF;
|
|
* if it is, then bail out, because there's likely no UART
|
|
* here.
|
|
*/
|
|
if (inb(info->ioaddr + UART_LSR) == 0xff) {
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
if (capable(CAP_SYS_ADMIN)) {
|
|
set_bit(TTY_IO_ERROR, &tty->flags);
|
|
return 0;
|
|
} else
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* Clear the interrupt registers.
|
|
*/
|
|
(void) inb(info->ioaddr + UART_LSR);
|
|
(void) inb(info->ioaddr + UART_RX);
|
|
(void) inb(info->ioaddr + UART_IIR);
|
|
(void) inb(info->ioaddr + UART_MSR);
|
|
|
|
/*
|
|
* Now, initialize the UART
|
|
*/
|
|
outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
|
|
info->MCR = UART_MCR_DTR | UART_MCR_RTS;
|
|
outb(info->MCR, info->ioaddr + UART_MCR);
|
|
|
|
/*
|
|
* Finally, enable interrupts
|
|
*/
|
|
info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
|
|
|
|
if (info->board->chip_flag)
|
|
info->IER |= MOXA_MUST_IER_EGDAI;
|
|
outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
|
|
|
|
/*
|
|
* And clear the interrupt registers again for luck.
|
|
*/
|
|
(void) inb(info->ioaddr + UART_LSR);
|
|
(void) inb(info->ioaddr + UART_RX);
|
|
(void) inb(info->ioaddr + UART_IIR);
|
|
(void) inb(info->ioaddr + UART_MSR);
|
|
|
|
clear_bit(TTY_IO_ERROR, &tty->flags);
|
|
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
|
|
|
|
/*
|
|
* and set the speed of the serial port
|
|
*/
|
|
mxser_change_speed(tty, NULL);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This routine will shutdown a serial port
|
|
*/
|
|
static void mxser_shutdown_port(struct tty_port *port)
|
|
{
|
|
struct mxser_port *info = container_of(port, struct mxser_port, port);
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
|
|
/*
|
|
* clear delta_msr_wait queue to avoid mem leaks: we may free the irq
|
|
* here so the queue might never be waken up
|
|
*/
|
|
wake_up_interruptible(&info->port.delta_msr_wait);
|
|
|
|
/*
|
|
* Free the xmit buffer, if necessary
|
|
*/
|
|
if (info->port.xmit_buf) {
|
|
free_page((unsigned long) info->port.xmit_buf);
|
|
info->port.xmit_buf = NULL;
|
|
}
|
|
|
|
info->IER = 0;
|
|
outb(0x00, info->ioaddr + UART_IER);
|
|
|
|
/* clear Rx/Tx FIFO's */
|
|
if (info->board->chip_flag)
|
|
outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
|
|
MOXA_MUST_FCR_GDA_MODE_ENABLE,
|
|
info->ioaddr + UART_FCR);
|
|
else
|
|
outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
|
|
info->ioaddr + UART_FCR);
|
|
|
|
/* read data port to reset things */
|
|
(void) inb(info->ioaddr + UART_RX);
|
|
|
|
|
|
if (info->board->chip_flag)
|
|
SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
|
|
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
}
|
|
|
|
/*
|
|
* This routine is called whenever a serial port is opened. It
|
|
* enables interrupts for a serial port, linking in its async structure into
|
|
* the IRQ chain. It also performs the serial-specific
|
|
* initialization for the tty structure.
|
|
*/
|
|
static int mxser_open(struct tty_struct *tty, struct file *filp)
|
|
{
|
|
struct mxser_port *info;
|
|
int line;
|
|
|
|
line = tty->index;
|
|
if (line == MXSER_PORTS)
|
|
return 0;
|
|
info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
|
|
if (!info->ioaddr)
|
|
return -ENODEV;
|
|
|
|
tty->driver_data = info;
|
|
return tty_port_open(&info->port, tty, filp);
|
|
}
|
|
|
|
static void mxser_flush_buffer(struct tty_struct *tty)
|
|
{
|
|
struct mxser_port *info = tty->driver_data;
|
|
char fcr;
|
|
unsigned long flags;
|
|
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
|
|
|
|
fcr = inb(info->ioaddr + UART_FCR);
|
|
outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
|
|
info->ioaddr + UART_FCR);
|
|
outb(fcr, info->ioaddr + UART_FCR);
|
|
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
|
|
tty_wakeup(tty);
|
|
}
|
|
|
|
|
|
static void mxser_close_port(struct tty_port *port)
|
|
{
|
|
struct mxser_port *info = container_of(port, struct mxser_port, port);
|
|
unsigned long timeout;
|
|
/*
|
|
* At this point we stop accepting input. To do this, we
|
|
* disable the receive line status interrupts, and tell the
|
|
* interrupt driver to stop checking the data ready bit in the
|
|
* line status register.
|
|
*/
|
|
info->IER &= ~UART_IER_RLSI;
|
|
if (info->board->chip_flag)
|
|
info->IER &= ~MOXA_MUST_RECV_ISR;
|
|
|
|
outb(info->IER, info->ioaddr + UART_IER);
|
|
/*
|
|
* Before we drop DTR, make sure the UART transmitter
|
|
* has completely drained; this is especially
|
|
* important if there is a transmit FIFO!
|
|
*/
|
|
timeout = jiffies + HZ;
|
|
while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
|
|
schedule_timeout_interruptible(5);
|
|
if (time_after(jiffies, timeout))
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This routine is called when the serial port gets closed. First, we
|
|
* wait for the last remaining data to be sent. Then, we unlink its
|
|
* async structure from the interrupt chain if necessary, and we free
|
|
* that IRQ if nothing is left in the chain.
|
|
*/
|
|
static void mxser_close(struct tty_struct *tty, struct file *filp)
|
|
{
|
|
struct mxser_port *info = tty->driver_data;
|
|
struct tty_port *port = &info->port;
|
|
|
|
if (tty->index == MXSER_PORTS || info == NULL)
|
|
return;
|
|
if (tty_port_close_start(port, tty, filp) == 0)
|
|
return;
|
|
mutex_lock(&port->mutex);
|
|
mxser_close_port(port);
|
|
mxser_flush_buffer(tty);
|
|
mxser_shutdown_port(port);
|
|
clear_bit(ASYNCB_INITIALIZED, &port->flags);
|
|
mutex_unlock(&port->mutex);
|
|
/* Right now the tty_port set is done outside of the close_end helper
|
|
as we don't yet have everyone using refcounts */
|
|
tty_port_close_end(port, tty);
|
|
tty_port_tty_set(port, NULL);
|
|
}
|
|
|
|
static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
|
|
{
|
|
int c, total = 0;
|
|
struct mxser_port *info = tty->driver_data;
|
|
unsigned long flags;
|
|
|
|
if (!info->port.xmit_buf)
|
|
return 0;
|
|
|
|
while (1) {
|
|
c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
|
|
SERIAL_XMIT_SIZE - info->xmit_head));
|
|
if (c <= 0)
|
|
break;
|
|
|
|
memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
info->xmit_head = (info->xmit_head + c) &
|
|
(SERIAL_XMIT_SIZE - 1);
|
|
info->xmit_cnt += c;
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
|
|
buf += c;
|
|
count -= c;
|
|
total += c;
|
|
}
|
|
|
|
if (info->xmit_cnt && !tty->stopped) {
|
|
if (!tty->hw_stopped ||
|
|
(info->type == PORT_16550A) ||
|
|
(info->board->chip_flag)) {
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
outb(info->IER & ~UART_IER_THRI, info->ioaddr +
|
|
UART_IER);
|
|
info->IER |= UART_IER_THRI;
|
|
outb(info->IER, info->ioaddr + UART_IER);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
}
|
|
}
|
|
return total;
|
|
}
|
|
|
|
static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
|
|
{
|
|
struct mxser_port *info = tty->driver_data;
|
|
unsigned long flags;
|
|
|
|
if (!info->port.xmit_buf)
|
|
return 0;
|
|
|
|
if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
|
|
return 0;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
info->port.xmit_buf[info->xmit_head++] = ch;
|
|
info->xmit_head &= SERIAL_XMIT_SIZE - 1;
|
|
info->xmit_cnt++;
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
if (!tty->stopped) {
|
|
if (!tty->hw_stopped ||
|
|
(info->type == PORT_16550A) ||
|
|
info->board->chip_flag) {
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
|
|
info->IER |= UART_IER_THRI;
|
|
outb(info->IER, info->ioaddr + UART_IER);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
|
|
static void mxser_flush_chars(struct tty_struct *tty)
|
|
{
|
|
struct mxser_port *info = tty->driver_data;
|
|
unsigned long flags;
|
|
|
|
if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf ||
|
|
(tty->hw_stopped && info->type != PORT_16550A &&
|
|
!info->board->chip_flag))
|
|
return;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
|
|
outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
|
|
info->IER |= UART_IER_THRI;
|
|
outb(info->IER, info->ioaddr + UART_IER);
|
|
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
}
|
|
|
|
static int mxser_write_room(struct tty_struct *tty)
|
|
{
|
|
struct mxser_port *info = tty->driver_data;
|
|
int ret;
|
|
|
|
ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
|
|
return ret < 0 ? 0 : ret;
|
|
}
|
|
|
|
static int mxser_chars_in_buffer(struct tty_struct *tty)
|
|
{
|
|
struct mxser_port *info = tty->driver_data;
|
|
return info->xmit_cnt;
|
|
}
|
|
|
|
/*
|
|
* ------------------------------------------------------------
|
|
* friends of mxser_ioctl()
|
|
* ------------------------------------------------------------
|
|
*/
|
|
static int mxser_get_serial_info(struct tty_struct *tty,
|
|
struct serial_struct __user *retinfo)
|
|
{
|
|
struct mxser_port *info = tty->driver_data;
|
|
struct serial_struct tmp = {
|
|
.type = info->type,
|
|
.line = tty->index,
|
|
.port = info->ioaddr,
|
|
.irq = info->board->irq,
|
|
.flags = info->port.flags,
|
|
.baud_base = info->baud_base,
|
|
.close_delay = info->port.close_delay,
|
|
.closing_wait = info->port.closing_wait,
|
|
.custom_divisor = info->custom_divisor,
|
|
.hub6 = 0
|
|
};
|
|
if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static int mxser_set_serial_info(struct tty_struct *tty,
|
|
struct serial_struct __user *new_info)
|
|
{
|
|
struct mxser_port *info = tty->driver_data;
|
|
struct tty_port *port = &info->port;
|
|
struct serial_struct new_serial;
|
|
speed_t baud;
|
|
unsigned long sl_flags;
|
|
unsigned int flags;
|
|
int retval = 0;
|
|
|
|
if (!new_info || !info->ioaddr)
|
|
return -ENODEV;
|
|
if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
|
|
return -EFAULT;
|
|
|
|
if (new_serial.irq != info->board->irq ||
|
|
new_serial.port != info->ioaddr)
|
|
return -EINVAL;
|
|
|
|
flags = port->flags & ASYNC_SPD_MASK;
|
|
|
|
if (!capable(CAP_SYS_ADMIN)) {
|
|
if ((new_serial.baud_base != info->baud_base) ||
|
|
(new_serial.close_delay != info->port.close_delay) ||
|
|
((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK)))
|
|
return -EPERM;
|
|
info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
|
|
(new_serial.flags & ASYNC_USR_MASK));
|
|
} else {
|
|
/*
|
|
* OK, past this point, all the error checking has been done.
|
|
* At this point, we start making changes.....
|
|
*/
|
|
port->flags = ((port->flags & ~ASYNC_FLAGS) |
|
|
(new_serial.flags & ASYNC_FLAGS));
|
|
port->close_delay = new_serial.close_delay * HZ / 100;
|
|
port->closing_wait = new_serial.closing_wait * HZ / 100;
|
|
tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
|
|
if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
|
|
(new_serial.baud_base != info->baud_base ||
|
|
new_serial.custom_divisor !=
|
|
info->custom_divisor)) {
|
|
if (new_serial.custom_divisor == 0)
|
|
return -EINVAL;
|
|
baud = new_serial.baud_base / new_serial.custom_divisor;
|
|
tty_encode_baud_rate(tty, baud, baud);
|
|
}
|
|
}
|
|
|
|
info->type = new_serial.type;
|
|
|
|
process_txrx_fifo(info);
|
|
|
|
if (test_bit(ASYNCB_INITIALIZED, &port->flags)) {
|
|
if (flags != (port->flags & ASYNC_SPD_MASK)) {
|
|
spin_lock_irqsave(&info->slock, sl_flags);
|
|
mxser_change_speed(tty, NULL);
|
|
spin_unlock_irqrestore(&info->slock, sl_flags);
|
|
}
|
|
} else {
|
|
retval = mxser_activate(port, tty);
|
|
if (retval == 0)
|
|
set_bit(ASYNCB_INITIALIZED, &port->flags);
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* mxser_get_lsr_info - get line status register info
|
|
*
|
|
* Purpose: Let user call ioctl() to get info when the UART physically
|
|
* is emptied. On bus types like RS485, the transmitter must
|
|
* release the bus after transmitting. This must be done when
|
|
* the transmit shift register is empty, not be done when the
|
|
* transmit holding register is empty. This functionality
|
|
* allows an RS485 driver to be written in user space.
|
|
*/
|
|
static int mxser_get_lsr_info(struct mxser_port *info,
|
|
unsigned int __user *value)
|
|
{
|
|
unsigned char status;
|
|
unsigned int result;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
status = inb(info->ioaddr + UART_LSR);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
|
|
return put_user(result, value);
|
|
}
|
|
|
|
static int mxser_tiocmget(struct tty_struct *tty)
|
|
{
|
|
struct mxser_port *info = tty->driver_data;
|
|
unsigned char control, status;
|
|
unsigned long flags;
|
|
|
|
|
|
if (tty->index == MXSER_PORTS)
|
|
return -ENOIOCTLCMD;
|
|
if (test_bit(TTY_IO_ERROR, &tty->flags))
|
|
return -EIO;
|
|
|
|
control = info->MCR;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
status = inb(info->ioaddr + UART_MSR);
|
|
if (status & UART_MSR_ANY_DELTA)
|
|
mxser_check_modem_status(tty, info, status);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
|
|
((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
|
|
((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
|
|
((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
|
|
((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
|
|
((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
|
|
}
|
|
|
|
static int mxser_tiocmset(struct tty_struct *tty,
|
|
unsigned int set, unsigned int clear)
|
|
{
|
|
struct mxser_port *info = tty->driver_data;
|
|
unsigned long flags;
|
|
|
|
|
|
if (tty->index == MXSER_PORTS)
|
|
return -ENOIOCTLCMD;
|
|
if (test_bit(TTY_IO_ERROR, &tty->flags))
|
|
return -EIO;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
|
|
if (set & TIOCM_RTS)
|
|
info->MCR |= UART_MCR_RTS;
|
|
if (set & TIOCM_DTR)
|
|
info->MCR |= UART_MCR_DTR;
|
|
|
|
if (clear & TIOCM_RTS)
|
|
info->MCR &= ~UART_MCR_RTS;
|
|
if (clear & TIOCM_DTR)
|
|
info->MCR &= ~UART_MCR_DTR;
|
|
|
|
outb(info->MCR, info->ioaddr + UART_MCR);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
return 0;
|
|
}
|
|
|
|
static int __init mxser_program_mode(int port)
|
|
{
|
|
int id, i, j, n;
|
|
|
|
outb(0, port);
|
|
outb(0, port);
|
|
outb(0, port);
|
|
(void)inb(port);
|
|
(void)inb(port);
|
|
outb(0, port);
|
|
(void)inb(port);
|
|
|
|
id = inb(port + 1) & 0x1F;
|
|
if ((id != C168_ASIC_ID) &&
|
|
(id != C104_ASIC_ID) &&
|
|
(id != C102_ASIC_ID) &&
|
|
(id != CI132_ASIC_ID) &&
|
|
(id != CI134_ASIC_ID) &&
|
|
(id != CI104J_ASIC_ID))
|
|
return -1;
|
|
for (i = 0, j = 0; i < 4; i++) {
|
|
n = inb(port + 2);
|
|
if (n == 'M') {
|
|
j = 1;
|
|
} else if ((j == 1) && (n == 1)) {
|
|
j = 2;
|
|
break;
|
|
} else
|
|
j = 0;
|
|
}
|
|
if (j != 2)
|
|
id = -2;
|
|
return id;
|
|
}
|
|
|
|
static void __init mxser_normal_mode(int port)
|
|
{
|
|
int i, n;
|
|
|
|
outb(0xA5, port + 1);
|
|
outb(0x80, port + 3);
|
|
outb(12, port + 0); /* 9600 bps */
|
|
outb(0, port + 1);
|
|
outb(0x03, port + 3); /* 8 data bits */
|
|
outb(0x13, port + 4); /* loop back mode */
|
|
for (i = 0; i < 16; i++) {
|
|
n = inb(port + 5);
|
|
if ((n & 0x61) == 0x60)
|
|
break;
|
|
if ((n & 1) == 1)
|
|
(void)inb(port);
|
|
}
|
|
outb(0x00, port + 4);
|
|
}
|
|
|
|
#define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
|
|
#define CHIP_DO 0x02 /* Serial Data Output in Eprom */
|
|
#define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
|
|
#define CHIP_DI 0x08 /* Serial Data Input in Eprom */
|
|
#define EN_CCMD 0x000 /* Chip's command register */
|
|
#define EN0_RSARLO 0x008 /* Remote start address reg 0 */
|
|
#define EN0_RSARHI 0x009 /* Remote start address reg 1 */
|
|
#define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
|
|
#define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
|
|
#define EN0_DCFG 0x00E /* Data configuration reg WR */
|
|
#define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
|
|
#define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
|
|
#define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
|
|
static int __init mxser_read_register(int port, unsigned short *regs)
|
|
{
|
|
int i, k, value, id;
|
|
unsigned int j;
|
|
|
|
id = mxser_program_mode(port);
|
|
if (id < 0)
|
|
return id;
|
|
for (i = 0; i < 14; i++) {
|
|
k = (i & 0x3F) | 0x180;
|
|
for (j = 0x100; j > 0; j >>= 1) {
|
|
outb(CHIP_CS, port);
|
|
if (k & j) {
|
|
outb(CHIP_CS | CHIP_DO, port);
|
|
outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
|
|
} else {
|
|
outb(CHIP_CS, port);
|
|
outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
|
|
}
|
|
}
|
|
(void)inb(port);
|
|
value = 0;
|
|
for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
|
|
outb(CHIP_CS, port);
|
|
outb(CHIP_CS | CHIP_SK, port);
|
|
if (inb(port) & CHIP_DI)
|
|
value |= j;
|
|
}
|
|
regs[i] = value;
|
|
outb(0, port);
|
|
}
|
|
mxser_normal_mode(port);
|
|
return id;
|
|
}
|
|
|
|
static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
|
|
{
|
|
struct mxser_port *ip;
|
|
struct tty_port *port;
|
|
struct tty_struct *tty;
|
|
int result, status;
|
|
unsigned int i, j;
|
|
int ret = 0;
|
|
|
|
switch (cmd) {
|
|
case MOXA_GET_MAJOR:
|
|
printk_ratelimited(KERN_WARNING "mxser: '%s' uses deprecated ioctl "
|
|
"%x (GET_MAJOR), fix your userspace\n",
|
|
current->comm, cmd);
|
|
return put_user(ttymajor, (int __user *)argp);
|
|
|
|
case MOXA_CHKPORTENABLE:
|
|
result = 0;
|
|
for (i = 0; i < MXSER_BOARDS; i++)
|
|
for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
|
|
if (mxser_boards[i].ports[j].ioaddr)
|
|
result |= (1 << i);
|
|
return put_user(result, (unsigned long __user *)argp);
|
|
case MOXA_GETDATACOUNT:
|
|
/* The receive side is locked by port->slock but it isn't
|
|
clear that an exact snapshot is worth copying here */
|
|
if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
|
|
ret = -EFAULT;
|
|
return ret;
|
|
case MOXA_GETMSTATUS: {
|
|
struct mxser_mstatus ms, __user *msu = argp;
|
|
for (i = 0; i < MXSER_BOARDS; i++)
|
|
for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
|
|
ip = &mxser_boards[i].ports[j];
|
|
port = &ip->port;
|
|
memset(&ms, 0, sizeof(ms));
|
|
|
|
mutex_lock(&port->mutex);
|
|
if (!ip->ioaddr)
|
|
goto copy;
|
|
|
|
tty = tty_port_tty_get(port);
|
|
|
|
if (!tty)
|
|
ms.cflag = ip->normal_termios.c_cflag;
|
|
else
|
|
ms.cflag = tty->termios.c_cflag;
|
|
tty_kref_put(tty);
|
|
spin_lock_irq(&ip->slock);
|
|
status = inb(ip->ioaddr + UART_MSR);
|
|
spin_unlock_irq(&ip->slock);
|
|
if (status & UART_MSR_DCD)
|
|
ms.dcd = 1;
|
|
if (status & UART_MSR_DSR)
|
|
ms.dsr = 1;
|
|
if (status & UART_MSR_CTS)
|
|
ms.cts = 1;
|
|
copy:
|
|
mutex_unlock(&port->mutex);
|
|
if (copy_to_user(msu, &ms, sizeof(ms)))
|
|
return -EFAULT;
|
|
msu++;
|
|
}
|
|
return 0;
|
|
}
|
|
case MOXA_ASPP_MON_EXT: {
|
|
struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */
|
|
unsigned int cflag, iflag, p;
|
|
u8 opmode;
|
|
|
|
me = kzalloc(sizeof(*me), GFP_KERNEL);
|
|
if (!me)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0, p = 0; i < MXSER_BOARDS; i++) {
|
|
for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) {
|
|
if (p >= ARRAY_SIZE(me->rx_cnt)) {
|
|
i = MXSER_BOARDS;
|
|
break;
|
|
}
|
|
ip = &mxser_boards[i].ports[j];
|
|
port = &ip->port;
|
|
|
|
mutex_lock(&port->mutex);
|
|
if (!ip->ioaddr) {
|
|
mutex_unlock(&port->mutex);
|
|
continue;
|
|
}
|
|
|
|
spin_lock_irq(&ip->slock);
|
|
status = mxser_get_msr(ip->ioaddr, 0, p);
|
|
|
|
if (status & UART_MSR_TERI)
|
|
ip->icount.rng++;
|
|
if (status & UART_MSR_DDSR)
|
|
ip->icount.dsr++;
|
|
if (status & UART_MSR_DDCD)
|
|
ip->icount.dcd++;
|
|
if (status & UART_MSR_DCTS)
|
|
ip->icount.cts++;
|
|
|
|
ip->mon_data.modem_status = status;
|
|
me->rx_cnt[p] = ip->mon_data.rxcnt;
|
|
me->tx_cnt[p] = ip->mon_data.txcnt;
|
|
me->up_rxcnt[p] = ip->mon_data.up_rxcnt;
|
|
me->up_txcnt[p] = ip->mon_data.up_txcnt;
|
|
me->modem_status[p] =
|
|
ip->mon_data.modem_status;
|
|
spin_unlock_irq(&ip->slock);
|
|
|
|
tty = tty_port_tty_get(&ip->port);
|
|
|
|
if (!tty) {
|
|
cflag = ip->normal_termios.c_cflag;
|
|
iflag = ip->normal_termios.c_iflag;
|
|
me->baudrate[p] = tty_termios_baud_rate(&ip->normal_termios);
|
|
} else {
|
|
cflag = tty->termios.c_cflag;
|
|
iflag = tty->termios.c_iflag;
|
|
me->baudrate[p] = tty_get_baud_rate(tty);
|
|
}
|
|
tty_kref_put(tty);
|
|
|
|
me->databits[p] = cflag & CSIZE;
|
|
me->stopbits[p] = cflag & CSTOPB;
|
|
me->parity[p] = cflag & (PARENB | PARODD |
|
|
CMSPAR);
|
|
|
|
if (cflag & CRTSCTS)
|
|
me->flowctrl[p] |= 0x03;
|
|
|
|
if (iflag & (IXON | IXOFF))
|
|
me->flowctrl[p] |= 0x0C;
|
|
|
|
if (ip->type == PORT_16550A)
|
|
me->fifo[p] = 1;
|
|
|
|
opmode = inb(ip->opmode_ioaddr)>>((p % 4) * 2);
|
|
opmode &= OP_MODE_MASK;
|
|
me->iftype[p] = opmode;
|
|
mutex_unlock(&port->mutex);
|
|
}
|
|
}
|
|
if (copy_to_user(argp, me, sizeof(*me)))
|
|
ret = -EFAULT;
|
|
kfree(me);
|
|
return ret;
|
|
}
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
|
|
struct async_icount *cprev)
|
|
{
|
|
struct async_icount cnow;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
cnow = info->icount; /* atomic copy */
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
|
|
ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
|
|
((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
|
|
((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
|
|
((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
|
|
|
|
*cprev = cnow;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int mxser_ioctl(struct tty_struct *tty,
|
|
unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct mxser_port *info = tty->driver_data;
|
|
struct tty_port *port = &info->port;
|
|
struct async_icount cnow;
|
|
unsigned long flags;
|
|
void __user *argp = (void __user *)arg;
|
|
int retval;
|
|
|
|
if (tty->index == MXSER_PORTS)
|
|
return mxser_ioctl_special(cmd, argp);
|
|
|
|
if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
|
|
int p;
|
|
unsigned long opmode;
|
|
static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
|
|
int shiftbit;
|
|
unsigned char val, mask;
|
|
|
|
p = tty->index % 4;
|
|
if (cmd == MOXA_SET_OP_MODE) {
|
|
if (get_user(opmode, (int __user *) argp))
|
|
return -EFAULT;
|
|
if (opmode != RS232_MODE &&
|
|
opmode != RS485_2WIRE_MODE &&
|
|
opmode != RS422_MODE &&
|
|
opmode != RS485_4WIRE_MODE)
|
|
return -EFAULT;
|
|
mask = ModeMask[p];
|
|
shiftbit = p * 2;
|
|
spin_lock_irq(&info->slock);
|
|
val = inb(info->opmode_ioaddr);
|
|
val &= mask;
|
|
val |= (opmode << shiftbit);
|
|
outb(val, info->opmode_ioaddr);
|
|
spin_unlock_irq(&info->slock);
|
|
} else {
|
|
shiftbit = p * 2;
|
|
spin_lock_irq(&info->slock);
|
|
opmode = inb(info->opmode_ioaddr) >> shiftbit;
|
|
spin_unlock_irq(&info->slock);
|
|
opmode &= OP_MODE_MASK;
|
|
if (put_user(opmode, (int __user *)argp))
|
|
return -EFAULT;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT &&
|
|
test_bit(TTY_IO_ERROR, &tty->flags))
|
|
return -EIO;
|
|
|
|
switch (cmd) {
|
|
case TIOCGSERIAL:
|
|
mutex_lock(&port->mutex);
|
|
retval = mxser_get_serial_info(tty, argp);
|
|
mutex_unlock(&port->mutex);
|
|
return retval;
|
|
case TIOCSSERIAL:
|
|
mutex_lock(&port->mutex);
|
|
retval = mxser_set_serial_info(tty, argp);
|
|
mutex_unlock(&port->mutex);
|
|
return retval;
|
|
case TIOCSERGETLSR: /* Get line status register */
|
|
return mxser_get_lsr_info(info, argp);
|
|
/*
|
|
* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
|
|
* - mask passed in arg for lines of interest
|
|
* (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
|
|
* Caller should use TIOCGICOUNT to see which one it was
|
|
*/
|
|
case TIOCMIWAIT:
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
cnow = info->icount; /* note the counters on entry */
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
|
|
return wait_event_interruptible(info->port.delta_msr_wait,
|
|
mxser_cflags_changed(info, arg, &cnow));
|
|
case MOXA_HighSpeedOn:
|
|
return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
|
|
case MOXA_SDS_RSTICOUNTER:
|
|
spin_lock_irq(&info->slock);
|
|
info->mon_data.rxcnt = 0;
|
|
info->mon_data.txcnt = 0;
|
|
spin_unlock_irq(&info->slock);
|
|
return 0;
|
|
|
|
case MOXA_ASPP_OQUEUE:{
|
|
int len, lsr;
|
|
|
|
len = mxser_chars_in_buffer(tty);
|
|
spin_lock_irq(&info->slock);
|
|
lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_THRE;
|
|
spin_unlock_irq(&info->slock);
|
|
len += (lsr ? 0 : 1);
|
|
|
|
return put_user(len, (int __user *)argp);
|
|
}
|
|
case MOXA_ASPP_MON: {
|
|
int mcr, status;
|
|
|
|
spin_lock_irq(&info->slock);
|
|
status = mxser_get_msr(info->ioaddr, 1, tty->index);
|
|
mxser_check_modem_status(tty, info, status);
|
|
|
|
mcr = inb(info->ioaddr + UART_MCR);
|
|
spin_unlock_irq(&info->slock);
|
|
|
|
if (mcr & MOXA_MUST_MCR_XON_FLAG)
|
|
info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
|
|
else
|
|
info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
|
|
|
|
if (mcr & MOXA_MUST_MCR_TX_XON)
|
|
info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
|
|
else
|
|
info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
|
|
|
|
if (tty->hw_stopped)
|
|
info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
|
|
else
|
|
info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
|
|
|
|
if (copy_to_user(argp, &info->mon_data,
|
|
sizeof(struct mxser_mon)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
case MOXA_ASPP_LSTATUS: {
|
|
if (put_user(info->err_shadow, (unsigned char __user *)argp))
|
|
return -EFAULT;
|
|
|
|
info->err_shadow = 0;
|
|
return 0;
|
|
}
|
|
case MOXA_SET_BAUD_METHOD: {
|
|
int method;
|
|
|
|
if (get_user(method, (int __user *)argp))
|
|
return -EFAULT;
|
|
mxser_set_baud_method[tty->index] = method;
|
|
return put_user(method, (int __user *)argp);
|
|
}
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
|
|
* Return: write counters to the user passed counter struct
|
|
* NB: both 1->0 and 0->1 transitions are counted except for
|
|
* RI where only 0->1 is counted.
|
|
*/
|
|
|
|
static int mxser_get_icount(struct tty_struct *tty,
|
|
struct serial_icounter_struct *icount)
|
|
|
|
{
|
|
struct mxser_port *info = tty->driver_data;
|
|
struct async_icount cnow;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
cnow = info->icount;
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
|
|
icount->frame = cnow.frame;
|
|
icount->brk = cnow.brk;
|
|
icount->overrun = cnow.overrun;
|
|
icount->buf_overrun = cnow.buf_overrun;
|
|
icount->parity = cnow.parity;
|
|
icount->rx = cnow.rx;
|
|
icount->tx = cnow.tx;
|
|
icount->cts = cnow.cts;
|
|
icount->dsr = cnow.dsr;
|
|
icount->rng = cnow.rng;
|
|
icount->dcd = cnow.dcd;
|
|
return 0;
|
|
}
|
|
|
|
static void mxser_stoprx(struct tty_struct *tty)
|
|
{
|
|
struct mxser_port *info = tty->driver_data;
|
|
|
|
info->ldisc_stop_rx = 1;
|
|
if (I_IXOFF(tty)) {
|
|
if (info->board->chip_flag) {
|
|
info->IER &= ~MOXA_MUST_RECV_ISR;
|
|
outb(info->IER, info->ioaddr + UART_IER);
|
|
} else {
|
|
info->x_char = STOP_CHAR(tty);
|
|
outb(0, info->ioaddr + UART_IER);
|
|
info->IER |= UART_IER_THRI;
|
|
outb(info->IER, info->ioaddr + UART_IER);
|
|
}
|
|
}
|
|
|
|
if (tty->termios.c_cflag & CRTSCTS) {
|
|
info->MCR &= ~UART_MCR_RTS;
|
|
outb(info->MCR, info->ioaddr + UART_MCR);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This routine is called by the upper-layer tty layer to signal that
|
|
* incoming characters should be throttled.
|
|
*/
|
|
static void mxser_throttle(struct tty_struct *tty)
|
|
{
|
|
mxser_stoprx(tty);
|
|
}
|
|
|
|
static void mxser_unthrottle(struct tty_struct *tty)
|
|
{
|
|
struct mxser_port *info = tty->driver_data;
|
|
|
|
/* startrx */
|
|
info->ldisc_stop_rx = 0;
|
|
if (I_IXOFF(tty)) {
|
|
if (info->x_char)
|
|
info->x_char = 0;
|
|
else {
|
|
if (info->board->chip_flag) {
|
|
info->IER |= MOXA_MUST_RECV_ISR;
|
|
outb(info->IER, info->ioaddr + UART_IER);
|
|
} else {
|
|
info->x_char = START_CHAR(tty);
|
|
outb(0, info->ioaddr + UART_IER);
|
|
info->IER |= UART_IER_THRI;
|
|
outb(info->IER, info->ioaddr + UART_IER);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (tty->termios.c_cflag & CRTSCTS) {
|
|
info->MCR |= UART_MCR_RTS;
|
|
outb(info->MCR, info->ioaddr + UART_MCR);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* mxser_stop() and mxser_start()
|
|
*
|
|
* This routines are called before setting or resetting tty->stopped.
|
|
* They enable or disable transmitter interrupts, as necessary.
|
|
*/
|
|
static void mxser_stop(struct tty_struct *tty)
|
|
{
|
|
struct mxser_port *info = tty->driver_data;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
if (info->IER & UART_IER_THRI) {
|
|
info->IER &= ~UART_IER_THRI;
|
|
outb(info->IER, info->ioaddr + UART_IER);
|
|
}
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
}
|
|
|
|
static void mxser_start(struct tty_struct *tty)
|
|
{
|
|
struct mxser_port *info = tty->driver_data;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
if (info->xmit_cnt && info->port.xmit_buf) {
|
|
outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
|
|
info->IER |= UART_IER_THRI;
|
|
outb(info->IER, info->ioaddr + UART_IER);
|
|
}
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
}
|
|
|
|
static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
|
|
{
|
|
struct mxser_port *info = tty->driver_data;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
mxser_change_speed(tty, old_termios);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
|
|
if ((old_termios->c_cflag & CRTSCTS) &&
|
|
!(tty->termios.c_cflag & CRTSCTS)) {
|
|
tty->hw_stopped = 0;
|
|
mxser_start(tty);
|
|
}
|
|
|
|
/* Handle sw stopped */
|
|
if ((old_termios->c_iflag & IXON) &&
|
|
!(tty->termios.c_iflag & IXON)) {
|
|
tty->stopped = 0;
|
|
|
|
if (info->board->chip_flag) {
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
mxser_disable_must_rx_software_flow_control(
|
|
info->ioaddr);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
}
|
|
|
|
mxser_start(tty);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* mxser_wait_until_sent() --- wait until the transmitter is empty
|
|
*/
|
|
static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
|
|
{
|
|
struct mxser_port *info = tty->driver_data;
|
|
unsigned long orig_jiffies, char_time;
|
|
unsigned long flags;
|
|
int lsr;
|
|
|
|
if (info->type == PORT_UNKNOWN)
|
|
return;
|
|
|
|
if (info->xmit_fifo_size == 0)
|
|
return; /* Just in case.... */
|
|
|
|
orig_jiffies = jiffies;
|
|
/*
|
|
* Set the check interval to be 1/5 of the estimated time to
|
|
* send a single character, and make it at least 1. The check
|
|
* interval should also be less than the timeout.
|
|
*
|
|
* Note: we have to use pretty tight timings here to satisfy
|
|
* the NIST-PCTS.
|
|
*/
|
|
char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
|
|
char_time = char_time / 5;
|
|
if (char_time == 0)
|
|
char_time = 1;
|
|
if (timeout && timeout < char_time)
|
|
char_time = timeout;
|
|
/*
|
|
* If the transmitter hasn't cleared in twice the approximate
|
|
* amount of time to send the entire FIFO, it probably won't
|
|
* ever clear. This assumes the UART isn't doing flow
|
|
* control, which is currently the case. Hence, if it ever
|
|
* takes longer than info->timeout, this is probably due to a
|
|
* UART bug of some kind. So, we clamp the timeout parameter at
|
|
* 2*info->timeout.
|
|
*/
|
|
if (!timeout || timeout > 2 * info->timeout)
|
|
timeout = 2 * info->timeout;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
schedule_timeout_interruptible(char_time);
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
if (signal_pending(current))
|
|
break;
|
|
if (timeout && time_after(jiffies, orig_jiffies + timeout))
|
|
break;
|
|
}
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
set_current_state(TASK_RUNNING);
|
|
}
|
|
|
|
/*
|
|
* This routine is called by tty_hangup() when a hangup is signaled.
|
|
*/
|
|
static void mxser_hangup(struct tty_struct *tty)
|
|
{
|
|
struct mxser_port *info = tty->driver_data;
|
|
|
|
mxser_flush_buffer(tty);
|
|
tty_port_hangup(&info->port);
|
|
}
|
|
|
|
/*
|
|
* mxser_rs_break() --- routine which turns the break handling on or off
|
|
*/
|
|
static int mxser_rs_break(struct tty_struct *tty, int break_state)
|
|
{
|
|
struct mxser_port *info = tty->driver_data;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
if (break_state == -1)
|
|
outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
|
|
info->ioaddr + UART_LCR);
|
|
else
|
|
outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
|
|
info->ioaddr + UART_LCR);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
return 0;
|
|
}
|
|
|
|
static void mxser_receive_chars(struct tty_struct *tty,
|
|
struct mxser_port *port, int *status)
|
|
{
|
|
unsigned char ch, gdl;
|
|
int ignored = 0;
|
|
int cnt = 0;
|
|
int recv_room;
|
|
int max = 256;
|
|
|
|
recv_room = tty->receive_room;
|
|
if (recv_room == 0 && !port->ldisc_stop_rx)
|
|
mxser_stoprx(tty);
|
|
if (port->board->chip_flag != MOXA_OTHER_UART) {
|
|
|
|
if (*status & UART_LSR_SPECIAL)
|
|
goto intr_old;
|
|
if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
|
|
(*status & MOXA_MUST_LSR_RERR))
|
|
goto intr_old;
|
|
if (*status & MOXA_MUST_LSR_RERR)
|
|
goto intr_old;
|
|
|
|
gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
|
|
|
|
if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
|
|
gdl &= MOXA_MUST_GDL_MASK;
|
|
if (gdl >= recv_room) {
|
|
if (!port->ldisc_stop_rx)
|
|
mxser_stoprx(tty);
|
|
}
|
|
while (gdl--) {
|
|
ch = inb(port->ioaddr + UART_RX);
|
|
tty_insert_flip_char(tty, ch, 0);
|
|
cnt++;
|
|
}
|
|
goto end_intr;
|
|
}
|
|
intr_old:
|
|
|
|
do {
|
|
if (max-- < 0)
|
|
break;
|
|
|
|
ch = inb(port->ioaddr + UART_RX);
|
|
if (port->board->chip_flag && (*status & UART_LSR_OE))
|
|
outb(0x23, port->ioaddr + UART_FCR);
|
|
*status &= port->read_status_mask;
|
|
if (*status & port->ignore_status_mask) {
|
|
if (++ignored > 100)
|
|
break;
|
|
} else {
|
|
char flag = 0;
|
|
if (*status & UART_LSR_SPECIAL) {
|
|
if (*status & UART_LSR_BI) {
|
|
flag = TTY_BREAK;
|
|
port->icount.brk++;
|
|
|
|
if (port->port.flags & ASYNC_SAK)
|
|
do_SAK(tty);
|
|
} else if (*status & UART_LSR_PE) {
|
|
flag = TTY_PARITY;
|
|
port->icount.parity++;
|
|
} else if (*status & UART_LSR_FE) {
|
|
flag = TTY_FRAME;
|
|
port->icount.frame++;
|
|
} else if (*status & UART_LSR_OE) {
|
|
flag = TTY_OVERRUN;
|
|
port->icount.overrun++;
|
|
} else
|
|
flag = TTY_BREAK;
|
|
}
|
|
tty_insert_flip_char(tty, ch, flag);
|
|
cnt++;
|
|
if (cnt >= recv_room) {
|
|
if (!port->ldisc_stop_rx)
|
|
mxser_stoprx(tty);
|
|
break;
|
|
}
|
|
|
|
}
|
|
|
|
if (port->board->chip_flag)
|
|
break;
|
|
|
|
*status = inb(port->ioaddr + UART_LSR);
|
|
} while (*status & UART_LSR_DR);
|
|
|
|
end_intr:
|
|
mxvar_log.rxcnt[tty->index] += cnt;
|
|
port->mon_data.rxcnt += cnt;
|
|
port->mon_data.up_rxcnt += cnt;
|
|
|
|
/*
|
|
* We are called from an interrupt context with &port->slock
|
|
* being held. Drop it temporarily in order to prevent
|
|
* recursive locking.
|
|
*/
|
|
spin_unlock(&port->slock);
|
|
tty_flip_buffer_push(tty);
|
|
spin_lock(&port->slock);
|
|
}
|
|
|
|
static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port)
|
|
{
|
|
int count, cnt;
|
|
|
|
if (port->x_char) {
|
|
outb(port->x_char, port->ioaddr + UART_TX);
|
|
port->x_char = 0;
|
|
mxvar_log.txcnt[tty->index]++;
|
|
port->mon_data.txcnt++;
|
|
port->mon_data.up_txcnt++;
|
|
port->icount.tx++;
|
|
return;
|
|
}
|
|
|
|
if (port->port.xmit_buf == NULL)
|
|
return;
|
|
|
|
if (port->xmit_cnt <= 0 || tty->stopped ||
|
|
(tty->hw_stopped &&
|
|
(port->type != PORT_16550A) &&
|
|
(!port->board->chip_flag))) {
|
|
port->IER &= ~UART_IER_THRI;
|
|
outb(port->IER, port->ioaddr + UART_IER);
|
|
return;
|
|
}
|
|
|
|
cnt = port->xmit_cnt;
|
|
count = port->xmit_fifo_size;
|
|
do {
|
|
outb(port->port.xmit_buf[port->xmit_tail++],
|
|
port->ioaddr + UART_TX);
|
|
port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
|
|
if (--port->xmit_cnt <= 0)
|
|
break;
|
|
} while (--count > 0);
|
|
mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt);
|
|
|
|
port->mon_data.txcnt += (cnt - port->xmit_cnt);
|
|
port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
|
|
port->icount.tx += (cnt - port->xmit_cnt);
|
|
|
|
if (port->xmit_cnt < WAKEUP_CHARS)
|
|
tty_wakeup(tty);
|
|
|
|
if (port->xmit_cnt <= 0) {
|
|
port->IER &= ~UART_IER_THRI;
|
|
outb(port->IER, port->ioaddr + UART_IER);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This is the serial driver's generic interrupt routine
|
|
*/
|
|
static irqreturn_t mxser_interrupt(int irq, void *dev_id)
|
|
{
|
|
int status, iir, i;
|
|
struct mxser_board *brd = NULL;
|
|
struct mxser_port *port;
|
|
int max, irqbits, bits, msr;
|
|
unsigned int int_cnt, pass_counter = 0;
|
|
int handled = IRQ_NONE;
|
|
struct tty_struct *tty;
|
|
|
|
for (i = 0; i < MXSER_BOARDS; i++)
|
|
if (dev_id == &mxser_boards[i]) {
|
|
brd = dev_id;
|
|
break;
|
|
}
|
|
|
|
if (i == MXSER_BOARDS)
|
|
goto irq_stop;
|
|
if (brd == NULL)
|
|
goto irq_stop;
|
|
max = brd->info->nports;
|
|
while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
|
|
irqbits = inb(brd->vector) & brd->vector_mask;
|
|
if (irqbits == brd->vector_mask)
|
|
break;
|
|
|
|
handled = IRQ_HANDLED;
|
|
for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
|
|
if (irqbits == brd->vector_mask)
|
|
break;
|
|
if (bits & irqbits)
|
|
continue;
|
|
port = &brd->ports[i];
|
|
|
|
int_cnt = 0;
|
|
spin_lock(&port->slock);
|
|
do {
|
|
iir = inb(port->ioaddr + UART_IIR);
|
|
if (iir & UART_IIR_NO_INT)
|
|
break;
|
|
iir &= MOXA_MUST_IIR_MASK;
|
|
tty = tty_port_tty_get(&port->port);
|
|
if (!tty ||
|
|
(port->port.flags & ASYNC_CLOSING) ||
|
|
!(port->port.flags &
|
|
ASYNC_INITIALIZED)) {
|
|
status = inb(port->ioaddr + UART_LSR);
|
|
outb(0x27, port->ioaddr + UART_FCR);
|
|
inb(port->ioaddr + UART_MSR);
|
|
tty_kref_put(tty);
|
|
break;
|
|
}
|
|
|
|
status = inb(port->ioaddr + UART_LSR);
|
|
|
|
if (status & UART_LSR_PE)
|
|
port->err_shadow |= NPPI_NOTIFY_PARITY;
|
|
if (status & UART_LSR_FE)
|
|
port->err_shadow |= NPPI_NOTIFY_FRAMING;
|
|
if (status & UART_LSR_OE)
|
|
port->err_shadow |=
|
|
NPPI_NOTIFY_HW_OVERRUN;
|
|
if (status & UART_LSR_BI)
|
|
port->err_shadow |= NPPI_NOTIFY_BREAK;
|
|
|
|
if (port->board->chip_flag) {
|
|
if (iir == MOXA_MUST_IIR_GDA ||
|
|
iir == MOXA_MUST_IIR_RDA ||
|
|
iir == MOXA_MUST_IIR_RTO ||
|
|
iir == MOXA_MUST_IIR_LSR)
|
|
mxser_receive_chars(tty, port,
|
|
&status);
|
|
|
|
} else {
|
|
status &= port->read_status_mask;
|
|
if (status & UART_LSR_DR)
|
|
mxser_receive_chars(tty, port,
|
|
&status);
|
|
}
|
|
msr = inb(port->ioaddr + UART_MSR);
|
|
if (msr & UART_MSR_ANY_DELTA)
|
|
mxser_check_modem_status(tty, port, msr);
|
|
|
|
if (port->board->chip_flag) {
|
|
if (iir == 0x02 && (status &
|
|
UART_LSR_THRE))
|
|
mxser_transmit_chars(tty, port);
|
|
} else {
|
|
if (status & UART_LSR_THRE)
|
|
mxser_transmit_chars(tty, port);
|
|
}
|
|
tty_kref_put(tty);
|
|
} while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
|
|
spin_unlock(&port->slock);
|
|
}
|
|
}
|
|
|
|
irq_stop:
|
|
return handled;
|
|
}
|
|
|
|
static const struct tty_operations mxser_ops = {
|
|
.open = mxser_open,
|
|
.close = mxser_close,
|
|
.write = mxser_write,
|
|
.put_char = mxser_put_char,
|
|
.flush_chars = mxser_flush_chars,
|
|
.write_room = mxser_write_room,
|
|
.chars_in_buffer = mxser_chars_in_buffer,
|
|
.flush_buffer = mxser_flush_buffer,
|
|
.ioctl = mxser_ioctl,
|
|
.throttle = mxser_throttle,
|
|
.unthrottle = mxser_unthrottle,
|
|
.set_termios = mxser_set_termios,
|
|
.stop = mxser_stop,
|
|
.start = mxser_start,
|
|
.hangup = mxser_hangup,
|
|
.break_ctl = mxser_rs_break,
|
|
.wait_until_sent = mxser_wait_until_sent,
|
|
.tiocmget = mxser_tiocmget,
|
|
.tiocmset = mxser_tiocmset,
|
|
.get_icount = mxser_get_icount,
|
|
};
|
|
|
|
static struct tty_port_operations mxser_port_ops = {
|
|
.carrier_raised = mxser_carrier_raised,
|
|
.dtr_rts = mxser_dtr_rts,
|
|
.activate = mxser_activate,
|
|
.shutdown = mxser_shutdown_port,
|
|
};
|
|
|
|
/*
|
|
* The MOXA Smartio/Industio serial driver boot-time initialization code!
|
|
*/
|
|
|
|
static bool allow_overlapping_vector;
|
|
module_param(allow_overlapping_vector, bool, S_IRUGO);
|
|
MODULE_PARM_DESC(allow_overlapping_vector, "whether we allow ISA cards to be configured such that vector overlabs IO ports (default=no)");
|
|
|
|
static bool mxser_overlapping_vector(struct mxser_board *brd)
|
|
{
|
|
return allow_overlapping_vector &&
|
|
brd->vector >= brd->ports[0].ioaddr &&
|
|
brd->vector < brd->ports[0].ioaddr + 8 * brd->info->nports;
|
|
}
|
|
|
|
static int mxser_request_vector(struct mxser_board *brd)
|
|
{
|
|
if (mxser_overlapping_vector(brd))
|
|
return 0;
|
|
return request_region(brd->vector, 1, "mxser(vector)") ? 0 : -EIO;
|
|
}
|
|
|
|
static void mxser_release_vector(struct mxser_board *brd)
|
|
{
|
|
if (mxser_overlapping_vector(brd))
|
|
return;
|
|
release_region(brd->vector, 1);
|
|
}
|
|
|
|
static void mxser_release_ISA_res(struct mxser_board *brd)
|
|
{
|
|
free_irq(brd->irq, brd);
|
|
release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
|
|
mxser_release_vector(brd);
|
|
}
|
|
|
|
static int __devinit mxser_initbrd(struct mxser_board *brd,
|
|
struct pci_dev *pdev)
|
|
{
|
|
struct mxser_port *info;
|
|
unsigned int i;
|
|
int retval;
|
|
|
|
printk(KERN_INFO "mxser: max. baud rate = %d bps\n",
|
|
brd->ports[0].max_baud);
|
|
|
|
for (i = 0; i < brd->info->nports; i++) {
|
|
info = &brd->ports[i];
|
|
tty_port_init(&info->port);
|
|
info->port.ops = &mxser_port_ops;
|
|
info->board = brd;
|
|
info->stop_rx = 0;
|
|
info->ldisc_stop_rx = 0;
|
|
|
|
/* Enhance mode enabled here */
|
|
if (brd->chip_flag != MOXA_OTHER_UART)
|
|
mxser_enable_must_enchance_mode(info->ioaddr);
|
|
|
|
info->port.flags = ASYNC_SHARE_IRQ;
|
|
info->type = brd->uart_type;
|
|
|
|
process_txrx_fifo(info);
|
|
|
|
info->custom_divisor = info->baud_base * 16;
|
|
info->port.close_delay = 5 * HZ / 10;
|
|
info->port.closing_wait = 30 * HZ;
|
|
info->normal_termios = mxvar_sdriver->init_termios;
|
|
memset(&info->mon_data, 0, sizeof(struct mxser_mon));
|
|
info->err_shadow = 0;
|
|
spin_lock_init(&info->slock);
|
|
|
|
/* before set INT ISR, disable all int */
|
|
outb(inb(info->ioaddr + UART_IER) & 0xf0,
|
|
info->ioaddr + UART_IER);
|
|
}
|
|
|
|
retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
|
|
brd);
|
|
if (retval)
|
|
printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
|
|
"conflict with another device.\n",
|
|
brd->info->name, brd->irq);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
|
|
{
|
|
int id, i, bits, ret;
|
|
unsigned short regs[16], irq;
|
|
unsigned char scratch, scratch2;
|
|
|
|
brd->chip_flag = MOXA_OTHER_UART;
|
|
|
|
id = mxser_read_register(cap, regs);
|
|
switch (id) {
|
|
case C168_ASIC_ID:
|
|
brd->info = &mxser_cards[0];
|
|
break;
|
|
case C104_ASIC_ID:
|
|
brd->info = &mxser_cards[1];
|
|
break;
|
|
case CI104J_ASIC_ID:
|
|
brd->info = &mxser_cards[2];
|
|
break;
|
|
case C102_ASIC_ID:
|
|
brd->info = &mxser_cards[5];
|
|
break;
|
|
case CI132_ASIC_ID:
|
|
brd->info = &mxser_cards[6];
|
|
break;
|
|
case CI134_ASIC_ID:
|
|
brd->info = &mxser_cards[7];
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
irq = 0;
|
|
/* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
|
|
Flag-hack checks if configuration should be read as 2-port here. */
|
|
if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
|
|
irq = regs[9] & 0xF000;
|
|
irq = irq | (irq >> 4);
|
|
if (irq != (regs[9] & 0xFF00))
|
|
goto err_irqconflict;
|
|
} else if (brd->info->nports == 4) {
|
|
irq = regs[9] & 0xF000;
|
|
irq = irq | (irq >> 4);
|
|
irq = irq | (irq >> 8);
|
|
if (irq != regs[9])
|
|
goto err_irqconflict;
|
|
} else if (brd->info->nports == 8) {
|
|
irq = regs[9] & 0xF000;
|
|
irq = irq | (irq >> 4);
|
|
irq = irq | (irq >> 8);
|
|
if ((irq != regs[9]) || (irq != regs[10]))
|
|
goto err_irqconflict;
|
|
}
|
|
|
|
if (!irq) {
|
|
printk(KERN_ERR "mxser: interrupt number unset\n");
|
|
return -EIO;
|
|
}
|
|
brd->irq = ((int)(irq & 0xF000) >> 12);
|
|
for (i = 0; i < 8; i++)
|
|
brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
|
|
if ((regs[12] & 0x80) == 0) {
|
|
printk(KERN_ERR "mxser: invalid interrupt vector\n");
|
|
return -EIO;
|
|
}
|
|
brd->vector = (int)regs[11]; /* interrupt vector */
|
|
if (id == 1)
|
|
brd->vector_mask = 0x00FF;
|
|
else
|
|
brd->vector_mask = 0x000F;
|
|
for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
|
|
if (regs[12] & bits) {
|
|
brd->ports[i].baud_base = 921600;
|
|
brd->ports[i].max_baud = 921600;
|
|
} else {
|
|
brd->ports[i].baud_base = 115200;
|
|
brd->ports[i].max_baud = 115200;
|
|
}
|
|
}
|
|
scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
|
|
outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
|
|
outb(0, cap + UART_EFR); /* EFR is the same as FCR */
|
|
outb(scratch2, cap + UART_LCR);
|
|
outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
|
|
scratch = inb(cap + UART_IIR);
|
|
|
|
if (scratch & 0xC0)
|
|
brd->uart_type = PORT_16550A;
|
|
else
|
|
brd->uart_type = PORT_16450;
|
|
if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
|
|
"mxser(IO)")) {
|
|
printk(KERN_ERR "mxser: can't request ports I/O region: "
|
|
"0x%.8lx-0x%.8lx\n",
|
|
brd->ports[0].ioaddr, brd->ports[0].ioaddr +
|
|
8 * brd->info->nports - 1);
|
|
return -EIO;
|
|
}
|
|
|
|
ret = mxser_request_vector(brd);
|
|
if (ret) {
|
|
release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
|
|
printk(KERN_ERR "mxser: can't request interrupt vector region: "
|
|
"0x%.8lx-0x%.8lx\n",
|
|
brd->ports[0].ioaddr, brd->ports[0].ioaddr +
|
|
8 * brd->info->nports - 1);
|
|
return ret;
|
|
}
|
|
return brd->info->nports;
|
|
|
|
err_irqconflict:
|
|
printk(KERN_ERR "mxser: invalid interrupt number\n");
|
|
return -EIO;
|
|
}
|
|
|
|
static int __devinit mxser_probe(struct pci_dev *pdev,
|
|
const struct pci_device_id *ent)
|
|
{
|
|
#ifdef CONFIG_PCI
|
|
struct mxser_board *brd;
|
|
unsigned int i, j;
|
|
unsigned long ioaddress;
|
|
int retval = -EINVAL;
|
|
|
|
for (i = 0; i < MXSER_BOARDS; i++)
|
|
if (mxser_boards[i].info == NULL)
|
|
break;
|
|
|
|
if (i >= MXSER_BOARDS) {
|
|
dev_err(&pdev->dev, "too many boards found (maximum %d), board "
|
|
"not configured\n", MXSER_BOARDS);
|
|
goto err;
|
|
}
|
|
|
|
brd = &mxser_boards[i];
|
|
brd->idx = i * MXSER_PORTS_PER_BOARD;
|
|
dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
|
|
mxser_cards[ent->driver_data].name,
|
|
pdev->bus->number, PCI_SLOT(pdev->devfn));
|
|
|
|
retval = pci_enable_device(pdev);
|
|
if (retval) {
|
|
dev_err(&pdev->dev, "PCI enable failed\n");
|
|
goto err;
|
|
}
|
|
|
|
/* io address */
|
|
ioaddress = pci_resource_start(pdev, 2);
|
|
retval = pci_request_region(pdev, 2, "mxser(IO)");
|
|
if (retval)
|
|
goto err_dis;
|
|
|
|
brd->info = &mxser_cards[ent->driver_data];
|
|
for (i = 0; i < brd->info->nports; i++)
|
|
brd->ports[i].ioaddr = ioaddress + 8 * i;
|
|
|
|
/* vector */
|
|
ioaddress = pci_resource_start(pdev, 3);
|
|
retval = pci_request_region(pdev, 3, "mxser(vector)");
|
|
if (retval)
|
|
goto err_zero;
|
|
brd->vector = ioaddress;
|
|
|
|
/* irq */
|
|
brd->irq = pdev->irq;
|
|
|
|
brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
|
|
brd->uart_type = PORT_16550A;
|
|
brd->vector_mask = 0;
|
|
|
|
for (i = 0; i < brd->info->nports; i++) {
|
|
for (j = 0; j < UART_INFO_NUM; j++) {
|
|
if (Gpci_uart_info[j].type == brd->chip_flag) {
|
|
brd->ports[i].max_baud =
|
|
Gpci_uart_info[j].max_baud;
|
|
|
|
/* exception....CP-102 */
|
|
if (brd->info->flags & MXSER_HIGHBAUD)
|
|
brd->ports[i].max_baud = 921600;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
|
|
for (i = 0; i < brd->info->nports; i++) {
|
|
if (i < 4)
|
|
brd->ports[i].opmode_ioaddr = ioaddress + 4;
|
|
else
|
|
brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
|
|
}
|
|
outb(0, ioaddress + 4); /* default set to RS232 mode */
|
|
outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
|
|
}
|
|
|
|
for (i = 0; i < brd->info->nports; i++) {
|
|
brd->vector_mask |= (1 << i);
|
|
brd->ports[i].baud_base = 921600;
|
|
}
|
|
|
|
/* mxser_initbrd will hook ISR. */
|
|
retval = mxser_initbrd(brd, pdev);
|
|
if (retval)
|
|
goto err_rel3;
|
|
|
|
for (i = 0; i < brd->info->nports; i++)
|
|
tty_port_register_device(&brd->ports[i].port, mxvar_sdriver,
|
|
brd->idx + i, &pdev->dev);
|
|
|
|
pci_set_drvdata(pdev, brd);
|
|
|
|
return 0;
|
|
err_rel3:
|
|
pci_release_region(pdev, 3);
|
|
err_zero:
|
|
brd->info = NULL;
|
|
pci_release_region(pdev, 2);
|
|
err_dis:
|
|
pci_disable_device(pdev);
|
|
err:
|
|
return retval;
|
|
#else
|
|
return -ENODEV;
|
|
#endif
|
|
}
|
|
|
|
static void __devexit mxser_remove(struct pci_dev *pdev)
|
|
{
|
|
#ifdef CONFIG_PCI
|
|
struct mxser_board *brd = pci_get_drvdata(pdev);
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < brd->info->nports; i++)
|
|
tty_unregister_device(mxvar_sdriver, brd->idx + i);
|
|
|
|
free_irq(pdev->irq, brd);
|
|
pci_release_region(pdev, 2);
|
|
pci_release_region(pdev, 3);
|
|
pci_disable_device(pdev);
|
|
brd->info = NULL;
|
|
#endif
|
|
}
|
|
|
|
static struct pci_driver mxser_driver = {
|
|
.name = "mxser",
|
|
.id_table = mxser_pcibrds,
|
|
.probe = mxser_probe,
|
|
.remove = __devexit_p(mxser_remove)
|
|
};
|
|
|
|
static int __init mxser_module_init(void)
|
|
{
|
|
struct mxser_board *brd;
|
|
unsigned int b, i, m;
|
|
int retval;
|
|
|
|
mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
|
|
if (!mxvar_sdriver)
|
|
return -ENOMEM;
|
|
|
|
printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
|
|
MXSER_VERSION);
|
|
|
|
/* Initialize the tty_driver structure */
|
|
mxvar_sdriver->name = "ttyMI";
|
|
mxvar_sdriver->major = ttymajor;
|
|
mxvar_sdriver->minor_start = 0;
|
|
mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
|
|
mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
|
|
mxvar_sdriver->init_termios = tty_std_termios;
|
|
mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
|
|
mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
|
|
tty_set_operations(mxvar_sdriver, &mxser_ops);
|
|
|
|
retval = tty_register_driver(mxvar_sdriver);
|
|
if (retval) {
|
|
printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
|
|
"tty driver !\n");
|
|
goto err_put;
|
|
}
|
|
|
|
/* Start finding ISA boards here */
|
|
for (m = 0, b = 0; b < MXSER_BOARDS; b++) {
|
|
if (!ioaddr[b])
|
|
continue;
|
|
|
|
brd = &mxser_boards[m];
|
|
retval = mxser_get_ISA_conf(ioaddr[b], brd);
|
|
if (retval <= 0) {
|
|
brd->info = NULL;
|
|
continue;
|
|
}
|
|
|
|
printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n",
|
|
brd->info->name, ioaddr[b]);
|
|
|
|
/* mxser_initbrd will hook ISR. */
|
|
if (mxser_initbrd(brd, NULL) < 0) {
|
|
brd->info = NULL;
|
|
continue;
|
|
}
|
|
|
|
brd->idx = m * MXSER_PORTS_PER_BOARD;
|
|
for (i = 0; i < brd->info->nports; i++)
|
|
tty_port_register_device(&brd->ports[i].port,
|
|
mxvar_sdriver, brd->idx + i, NULL);
|
|
|
|
m++;
|
|
}
|
|
|
|
retval = pci_register_driver(&mxser_driver);
|
|
if (retval) {
|
|
printk(KERN_ERR "mxser: can't register pci driver\n");
|
|
if (!m) {
|
|
retval = -ENODEV;
|
|
goto err_unr;
|
|
} /* else: we have some ISA cards under control */
|
|
}
|
|
|
|
return 0;
|
|
err_unr:
|
|
tty_unregister_driver(mxvar_sdriver);
|
|
err_put:
|
|
put_tty_driver(mxvar_sdriver);
|
|
return retval;
|
|
}
|
|
|
|
static void __exit mxser_module_exit(void)
|
|
{
|
|
unsigned int i, j;
|
|
|
|
pci_unregister_driver(&mxser_driver);
|
|
|
|
for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
|
|
if (mxser_boards[i].info != NULL)
|
|
for (j = 0; j < mxser_boards[i].info->nports; j++)
|
|
tty_unregister_device(mxvar_sdriver,
|
|
mxser_boards[i].idx + j);
|
|
tty_unregister_driver(mxvar_sdriver);
|
|
put_tty_driver(mxvar_sdriver);
|
|
|
|
for (i = 0; i < MXSER_BOARDS; i++)
|
|
if (mxser_boards[i].info != NULL)
|
|
mxser_release_ISA_res(&mxser_boards[i]);
|
|
}
|
|
|
|
module_init(mxser_module_init);
|
|
module_exit(mxser_module_exit);
|