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b68e31d0eb
As part of an SMP cleanliness pass over UML, I consted a bunch of structures in order to not have to document their locking. One of these structures was a struct tty_operations. In order to const it in UML without introducing compiler complaints, the declaration of tty_set_operations needs to be changed, and then all of its callers need to be fixed. This patch declares all struct tty_operations in the tree as const. In all cases, they are static and used only as input to tty_set_operations. As an extra check, I ran an i386 allyesconfig build which produced no extra warnings. 53 drivers are affected. I checked the history of a bunch of them, and in most cases, there have been only a handful of maintenance changes in the last six months. serial_core.c was the busiest one that I looked at. Signed-off-by: Jeff Dike <jdike@addtoit.com> Acked-by: Alan Cox <alan@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
3180 lines
83 KiB
C
3180 lines
83 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) 1999-2001 Moxa Technologies (support@moxa.com.tw).
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*
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* This code is loosely based on the Linux serial driver, written by
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* Linus Torvalds, Theodore T'so and others.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Original release 10/26/00
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*
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* 02/06/01 Support MOXA Industio family boards.
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* 02/06/01 Support TIOCGICOUNT.
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* 02/06/01 Fix the problem for connecting to serial mouse.
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* 02/06/01 Fix the problem for H/W flow control.
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* 02/06/01 Fix the compling warning when CONFIG_PCI
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* don't be defined.
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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@redhat.com>. The original 1.8 code is available on www.moxa.com.
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* - Fixed x86_64 cleanness
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* - Fixed sleep with spinlock held in mxser_send_break
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*/
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#include <linux/module.h>
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#include <linux/autoconf.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/gfp.h>
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#include <linux/ioport.h>
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#include <linux/mm.h>
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#include <linux/smp_lock.h>
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#include <linux/delay.h>
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#include <linux/pci.h>
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#include <asm/system.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/bitops.h>
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#include <asm/uaccess.h>
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#include "mxser.h"
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#define MXSER_VERSION "1.8"
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#define MXSERMAJOR 174
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#define MXSERCUMAJOR 175
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#define MXSER_EVENT_TXLOW 1
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#define MXSER_EVENT_HANGUP 2
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#define MXSER_BOARDS 4 /* Max. boards */
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#define MXSER_PORTS 32 /* Max. ports */
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#define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
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#define MXSER_ISR_PASS_LIMIT 256
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#define MXSER_ERR_IOADDR -1
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#define MXSER_ERR_IRQ -2
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#define MXSER_ERR_IRQ_CONFLIT -3
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#define MXSER_ERR_VECTOR -4
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#define SERIAL_TYPE_NORMAL 1
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#define SERIAL_TYPE_CALLOUT 2
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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 RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|\
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IXON|IXOFF))
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#define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? IRQF_SHARED : IRQF_DISABLED)
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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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enum {
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MXSER_BOARD_C168_ISA = 1,
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MXSER_BOARD_C104_ISA,
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MXSER_BOARD_CI104J,
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MXSER_BOARD_C168_PCI,
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MXSER_BOARD_C104_PCI,
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MXSER_BOARD_C102_ISA,
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MXSER_BOARD_CI132,
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MXSER_BOARD_CI134,
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MXSER_BOARD_CP132,
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MXSER_BOARD_CP114,
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MXSER_BOARD_CT114,
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MXSER_BOARD_CP102,
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MXSER_BOARD_CP104U,
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MXSER_BOARD_CP168U,
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MXSER_BOARD_CP132U,
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MXSER_BOARD_CP134U,
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MXSER_BOARD_CP104JU,
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MXSER_BOARD_RC7000,
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MXSER_BOARD_CP118U,
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MXSER_BOARD_CP102UL,
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MXSER_BOARD_CP102U,
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};
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static char *mxser_brdname[] = {
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"C168 series",
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"C104 series",
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"CI-104J series",
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"C168H/PCI series",
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"C104H/PCI series",
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"C102 series",
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"CI-132 series",
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"CI-134 series",
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"CP-132 series",
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"CP-114 series",
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"CT-114 series",
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"CP-102 series",
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"CP-104U series",
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"CP-168U series",
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"CP-132U series",
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"CP-134U series",
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"CP-104JU series",
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"Moxa UC7000 Serial",
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"CP-118U series",
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"CP-102UL series",
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"CP-102U series",
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};
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static int mxser_numports[] = {
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8, /* C168-ISA */
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4, /* C104-ISA */
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4, /* CI104J */
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8, /* C168-PCI */
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4, /* C104-PCI */
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2, /* C102-ISA */
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2, /* CI132 */
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4, /* CI134 */
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2, /* CP132 */
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4, /* CP114 */
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4, /* CT114 */
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2, /* CP102 */
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4, /* CP104U */
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8, /* CP168U */
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2, /* CP132U */
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4, /* CP134U */
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4, /* CP104JU */
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8, /* RC7000 */
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8, /* CP118U */
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2, /* CP102UL */
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2, /* CP102U */
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};
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#define UART_TYPE_NUM 2
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static const unsigned int Gmoxa_uart_id[UART_TYPE_NUM] = {
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MOXA_MUST_MU150_HWID,
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MOXA_MUST_MU860_HWID
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};
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/* This is only for PCI */
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#define UART_INFO_NUM 3
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struct mxpciuart_info {
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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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};
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static const struct mxpciuart_info Gpci_uart_info[UART_INFO_NUM] = {
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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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#ifdef CONFIG_PCI
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static struct pci_device_id mxser_pcibrds[] = {
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{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C168_PCI},
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{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C104_PCI},
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{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132},
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{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP114},
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{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CT114},
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{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102},
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{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104U},
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{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP168U},
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{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132U},
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{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP134U},
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{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104JU},
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{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_RC7000},
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{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP118U},
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{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102UL},
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{PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102U},
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{0}
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};
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MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
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#endif
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typedef struct _moxa_pci_info {
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unsigned short busNum;
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unsigned short devNum;
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struct pci_dev *pdev; /* add by Victor Yu. 06-23-2003 */
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} moxa_pci_info;
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static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
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static int ttymajor = MXSERMAJOR;
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static int calloutmajor = MXSERCUMAJOR;
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static int verbose = 0;
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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, int, NULL, 0);
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module_param(ttymajor, int, 0);
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module_param(calloutmajor, int, 0);
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module_param(verbose, bool, 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_hwconf {
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int board_type;
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int ports;
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int irq;
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int vector;
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int vector_mask;
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int uart_type;
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int ioaddr[MXSER_PORTS_PER_BOARD];
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int baud_base[MXSER_PORTS_PER_BOARD];
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moxa_pci_info pciInfo;
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int IsMoxaMustChipFlag; /* add by Victor Yu. 08-30-2002 */
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int MaxCanSetBaudRate[MXSER_PORTS_PER_BOARD]; /* add by Victor Yu. 09-04-2002 */
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int opmode_ioaddr[MXSER_PORTS_PER_BOARD]; /* add by Victor Yu. 01-05-2004 */
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};
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struct mxser_struct {
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int port;
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int base; /* port base address */
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int irq; /* port using irq no. */
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int vector; /* port irq vector */
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int vectormask; /* port vector mask */
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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 flags; /* defined in tty.h */
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int type; /* UART type */
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struct tty_struct *tty;
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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 custom_divisor;
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int x_char; /* xon/xoff character */
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int close_delay;
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unsigned short closing_wait;
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int IER; /* Interrupt Enable Register */
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int MCR; /* Modem control register */
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unsigned long event;
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int count; /* # of fd on device */
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int blocked_open; /* # of blocked opens */
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long session; /* Session of opening process */
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long pgrp; /* pgrp of opening process */
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unsigned char *xmit_buf;
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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 work_struct tqueue;
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struct termios normal_termios;
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struct termios callout_termios;
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wait_queue_head_t open_wait;
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wait_queue_head_t close_wait;
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wait_queue_head_t delta_msr_wait;
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struct async_icount icount; /* kernel counters for the 4 input interrupts */
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int timeout;
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int IsMoxaMustChipFlag; /* add by Victor Yu. 08-30-2002 */
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int MaxCanSetBaudRate; /* add by Victor Yu. 09-04-2002 */
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int opmode_ioaddr; /* add by Victor Yu. 01-05-2004 */
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unsigned char stop_rx;
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unsigned char ldisc_stop_rx;
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long realbaud;
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struct mxser_mon mon_data;
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unsigned char err_shadow;
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spinlock_t slock;
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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_mstatus GMStatus[MXSER_PORTS];
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static int mxserBoardCAP[MXSER_BOARDS] = {
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0, 0, 0, 0
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/* 0x180, 0x280, 0x200, 0x320 */
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};
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static struct tty_driver *mxvar_sdriver;
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static struct mxser_struct mxvar_table[MXSER_PORTS];
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static struct tty_struct *mxvar_tty[MXSER_PORTS + 1];
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static struct termios *mxvar_termios[MXSER_PORTS + 1];
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static struct termios *mxvar_termios_locked[MXSER_PORTS + 1];
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static struct mxser_log mxvar_log;
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static int mxvar_diagflag;
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static unsigned char mxser_msr[MXSER_PORTS + 1];
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static struct mxser_mon_ext mon_data_ext;
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static int mxser_set_baud_method[MXSER_PORTS + 1];
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static spinlock_t gm_lock;
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/*
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* This is used to figure out the divisor speeds and the timeouts
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*/
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static struct mxser_hwconf mxsercfg[MXSER_BOARDS];
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/*
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* static functions:
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*/
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static void mxser_getcfg(int board, struct mxser_hwconf *hwconf);
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static int mxser_init(void);
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/* static void mxser_poll(unsigned long); */
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static int mxser_get_ISA_conf(int, struct mxser_hwconf *);
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static int mxser_get_PCI_conf(int, int, int, struct mxser_hwconf *);
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static void mxser_do_softint(void *);
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static int mxser_open(struct tty_struct *, struct file *);
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static void mxser_close(struct tty_struct *, struct file *);
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static int mxser_write(struct tty_struct *, const unsigned char *, int);
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static int mxser_write_room(struct tty_struct *);
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static void mxser_flush_buffer(struct tty_struct *);
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static int mxser_chars_in_buffer(struct tty_struct *);
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static void mxser_flush_chars(struct tty_struct *);
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static void mxser_put_char(struct tty_struct *, unsigned char);
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static int mxser_ioctl(struct tty_struct *, struct file *, uint, ulong);
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static int mxser_ioctl_special(unsigned int, void __user *);
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static void mxser_throttle(struct tty_struct *);
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static void mxser_unthrottle(struct tty_struct *);
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static void mxser_set_termios(struct tty_struct *, struct termios *);
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static void mxser_stop(struct tty_struct *);
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static void mxser_start(struct tty_struct *);
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static void mxser_hangup(struct tty_struct *);
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static void mxser_rs_break(struct tty_struct *, int);
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static irqreturn_t mxser_interrupt(int, void *, struct pt_regs *);
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static void mxser_receive_chars(struct mxser_struct *, int *);
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static void mxser_transmit_chars(struct mxser_struct *);
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static void mxser_check_modem_status(struct mxser_struct *, int);
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static int mxser_block_til_ready(struct tty_struct *, struct file *, struct mxser_struct *);
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static int mxser_startup(struct mxser_struct *);
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static void mxser_shutdown(struct mxser_struct *);
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static int mxser_change_speed(struct mxser_struct *, struct termios *old_termios);
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static int mxser_get_serial_info(struct mxser_struct *, struct serial_struct __user *);
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static int mxser_set_serial_info(struct mxser_struct *, struct serial_struct __user *);
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static int mxser_get_lsr_info(struct mxser_struct *, unsigned int __user *);
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static void mxser_send_break(struct mxser_struct *, int);
|
|
static int mxser_tiocmget(struct tty_struct *, struct file *);
|
|
static int mxser_tiocmset(struct tty_struct *, struct file *, unsigned int, unsigned int);
|
|
static int mxser_set_baud(struct mxser_struct *info, long newspd);
|
|
static void mxser_wait_until_sent(struct tty_struct *tty, int timeout);
|
|
|
|
static void mxser_startrx(struct tty_struct *tty);
|
|
static void mxser_stoprx(struct tty_struct *tty);
|
|
|
|
|
|
static int CheckIsMoxaMust(int io)
|
|
{
|
|
u8 oldmcr, hwid;
|
|
int i;
|
|
|
|
outb(0, io + UART_LCR);
|
|
DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
|
|
oldmcr = inb(io + UART_MCR);
|
|
outb(0, io + UART_MCR);
|
|
SET_MOXA_MUST_XON1_VALUE(io, 0x11);
|
|
if ((hwid = inb(io + UART_MCR)) != 0) {
|
|
outb(oldmcr, io + UART_MCR);
|
|
return MOXA_OTHER_UART;
|
|
}
|
|
|
|
GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
|
|
for (i = 0; i < UART_TYPE_NUM; i++) {
|
|
if (hwid == Gmoxa_uart_id[i])
|
|
return (int)hwid;
|
|
}
|
|
return MOXA_OTHER_UART;
|
|
}
|
|
|
|
/* above is modified by Victor Yu. 08-15-2002 */
|
|
|
|
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,
|
|
};
|
|
|
|
/*
|
|
* The MOXA Smartio/Industio serial driver boot-time initialization code!
|
|
*/
|
|
|
|
static int __init mxser_module_init(void)
|
|
{
|
|
int ret;
|
|
|
|
if (verbose)
|
|
printk(KERN_DEBUG "Loading module mxser ...\n");
|
|
ret = mxser_init();
|
|
if (verbose)
|
|
printk(KERN_DEBUG "Done.\n");
|
|
return ret;
|
|
}
|
|
|
|
static void __exit mxser_module_exit(void)
|
|
{
|
|
int i, err;
|
|
|
|
if (verbose)
|
|
printk(KERN_DEBUG "Unloading module mxser ...\n");
|
|
|
|
err = tty_unregister_driver(mxvar_sdriver);
|
|
if (!err)
|
|
put_tty_driver(mxvar_sdriver);
|
|
else
|
|
printk(KERN_ERR "Couldn't unregister MOXA Smartio/Industio family serial driver\n");
|
|
|
|
for (i = 0; i < MXSER_BOARDS; i++) {
|
|
struct pci_dev *pdev;
|
|
|
|
if (mxsercfg[i].board_type == -1)
|
|
continue;
|
|
else {
|
|
pdev = mxsercfg[i].pciInfo.pdev;
|
|
free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
|
|
if (pdev != NULL) { /* PCI */
|
|
release_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2));
|
|
release_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3));
|
|
} else {
|
|
release_region(mxsercfg[i].ioaddr[0], 8 * mxsercfg[i].ports);
|
|
release_region(mxsercfg[i].vector, 1);
|
|
}
|
|
}
|
|
}
|
|
if (verbose)
|
|
printk(KERN_DEBUG "Done.\n");
|
|
}
|
|
|
|
static void process_txrx_fifo(struct mxser_struct *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->IsMoxaMustChipFlag == 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 int mxser_initbrd(int board, struct mxser_hwconf *hwconf)
|
|
{
|
|
struct mxser_struct *info;
|
|
int retval;
|
|
int i, n;
|
|
|
|
n = board * MXSER_PORTS_PER_BOARD;
|
|
info = &mxvar_table[n];
|
|
/*if (verbose) */ {
|
|
printk(KERN_DEBUG " ttyM%d - ttyM%d ",
|
|
n, n + hwconf->ports - 1);
|
|
printk(" max. baud rate = %d bps.\n",
|
|
hwconf->MaxCanSetBaudRate[0]);
|
|
}
|
|
|
|
for (i = 0; i < hwconf->ports; i++, n++, info++) {
|
|
info->port = n;
|
|
info->base = hwconf->ioaddr[i];
|
|
info->irq = hwconf->irq;
|
|
info->vector = hwconf->vector;
|
|
info->vectormask = hwconf->vector_mask;
|
|
info->opmode_ioaddr = hwconf->opmode_ioaddr[i]; /* add by Victor Yu. 01-05-2004 */
|
|
info->stop_rx = 0;
|
|
info->ldisc_stop_rx = 0;
|
|
|
|
info->IsMoxaMustChipFlag = hwconf->IsMoxaMustChipFlag;
|
|
/* Enhance mode enabled here */
|
|
if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
|
|
ENABLE_MOXA_MUST_ENCHANCE_MODE(info->base);
|
|
}
|
|
|
|
info->flags = ASYNC_SHARE_IRQ;
|
|
info->type = hwconf->uart_type;
|
|
info->baud_base = hwconf->baud_base[i];
|
|
|
|
info->MaxCanSetBaudRate = hwconf->MaxCanSetBaudRate[i];
|
|
|
|
process_txrx_fifo(info);
|
|
|
|
|
|
info->custom_divisor = hwconf->baud_base[i] * 16;
|
|
info->close_delay = 5 * HZ / 10;
|
|
info->closing_wait = 30 * HZ;
|
|
INIT_WORK(&info->tqueue, mxser_do_softint, info);
|
|
info->normal_termios = mxvar_sdriver->init_termios;
|
|
init_waitqueue_head(&info->open_wait);
|
|
init_waitqueue_head(&info->close_wait);
|
|
init_waitqueue_head(&info->delta_msr_wait);
|
|
memset(&info->mon_data, 0, sizeof(struct mxser_mon));
|
|
info->err_shadow = 0;
|
|
spin_lock_init(&info->slock);
|
|
}
|
|
/*
|
|
* Allocate the IRQ if necessary
|
|
*/
|
|
|
|
|
|
/* before set INT ISR, disable all int */
|
|
for (i = 0; i < hwconf->ports; i++) {
|
|
outb(inb(hwconf->ioaddr[i] + UART_IER) & 0xf0,
|
|
hwconf->ioaddr[i] + UART_IER);
|
|
}
|
|
|
|
n = board * MXSER_PORTS_PER_BOARD;
|
|
info = &mxvar_table[n];
|
|
|
|
retval = request_irq(hwconf->irq, mxser_interrupt, IRQ_T(info),
|
|
"mxser", info);
|
|
if (retval) {
|
|
printk(KERN_ERR "Board %d: %s",
|
|
board, mxser_brdname[hwconf->board_type - 1]);
|
|
printk(" Request irq failed, IRQ (%d) may conflict with"
|
|
" another device.\n", info->irq);
|
|
return retval;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void mxser_getcfg(int board, struct mxser_hwconf *hwconf)
|
|
{
|
|
mxsercfg[board] = *hwconf;
|
|
}
|
|
|
|
#ifdef CONFIG_PCI
|
|
static int mxser_get_PCI_conf(int busnum, int devnum, int board_type, struct mxser_hwconf *hwconf)
|
|
{
|
|
int i, j;
|
|
/* unsigned int val; */
|
|
unsigned int ioaddress;
|
|
struct pci_dev *pdev = hwconf->pciInfo.pdev;
|
|
|
|
/* io address */
|
|
hwconf->board_type = board_type;
|
|
hwconf->ports = mxser_numports[board_type - 1];
|
|
ioaddress = pci_resource_start(pdev, 2);
|
|
request_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2),
|
|
"mxser(IO)");
|
|
|
|
for (i = 0; i < hwconf->ports; i++)
|
|
hwconf->ioaddr[i] = ioaddress + 8 * i;
|
|
|
|
/* vector */
|
|
ioaddress = pci_resource_start(pdev, 3);
|
|
request_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3),
|
|
"mxser(vector)");
|
|
hwconf->vector = ioaddress;
|
|
|
|
/* irq */
|
|
hwconf->irq = hwconf->pciInfo.pdev->irq;
|
|
|
|
hwconf->IsMoxaMustChipFlag = CheckIsMoxaMust(hwconf->ioaddr[0]);
|
|
hwconf->uart_type = PORT_16550A;
|
|
hwconf->vector_mask = 0;
|
|
|
|
|
|
for (i = 0; i < hwconf->ports; i++) {
|
|
for (j = 0; j < UART_INFO_NUM; j++) {
|
|
if (Gpci_uart_info[j].type == hwconf->IsMoxaMustChipFlag) {
|
|
hwconf->MaxCanSetBaudRate[i] = Gpci_uart_info[j].max_baud;
|
|
|
|
/* exception....CP-102 */
|
|
if (board_type == MXSER_BOARD_CP102)
|
|
hwconf->MaxCanSetBaudRate[i] = 921600;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (hwconf->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID) {
|
|
for (i = 0; i < hwconf->ports; i++) {
|
|
if (i < 4)
|
|
hwconf->opmode_ioaddr[i] = ioaddress + 4;
|
|
else
|
|
hwconf->opmode_ioaddr[i] = ioaddress + 0x0c;
|
|
}
|
|
outb(0, ioaddress + 4); /* default set to RS232 mode */
|
|
outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
|
|
}
|
|
|
|
for (i = 0; i < hwconf->ports; i++) {
|
|
hwconf->vector_mask |= (1 << i);
|
|
hwconf->baud_base[i] = 921600;
|
|
}
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int mxser_init(void)
|
|
{
|
|
int i, m, retval, b, n;
|
|
struct pci_dev *pdev = NULL;
|
|
int index;
|
|
unsigned char busnum, devnum;
|
|
struct mxser_hwconf hwconf;
|
|
|
|
mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
|
|
if (!mxvar_sdriver)
|
|
return -ENOMEM;
|
|
spin_lock_init(&gm_lock);
|
|
|
|
for (i = 0; i < MXSER_BOARDS; i++) {
|
|
mxsercfg[i].board_type = -1;
|
|
}
|
|
|
|
printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
|
|
MXSER_VERSION);
|
|
|
|
/* Initialize the tty_driver structure */
|
|
memset(mxvar_sdriver, 0, sizeof(struct tty_driver));
|
|
mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
|
|
mxvar_sdriver->name = "ttyM";
|
|
mxvar_sdriver->major = ttymajor;
|
|
mxvar_sdriver->minor_start = 0;
|
|
mxvar_sdriver->num = MXSER_PORTS + 1;
|
|
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_set_operations(mxvar_sdriver, &mxser_ops);
|
|
mxvar_sdriver->ttys = mxvar_tty;
|
|
mxvar_sdriver->termios = mxvar_termios;
|
|
mxvar_sdriver->termios_locked = mxvar_termios_locked;
|
|
|
|
mxvar_diagflag = 0;
|
|
memset(mxvar_table, 0, MXSER_PORTS * sizeof(struct mxser_struct));
|
|
memset(&mxvar_log, 0, sizeof(struct mxser_log));
|
|
|
|
memset(&mxser_msr, 0, sizeof(unsigned char) * (MXSER_PORTS + 1));
|
|
memset(&mon_data_ext, 0, sizeof(struct mxser_mon_ext));
|
|
memset(&mxser_set_baud_method, 0, sizeof(int) * (MXSER_PORTS + 1));
|
|
memset(&hwconf, 0, sizeof(struct mxser_hwconf));
|
|
|
|
m = 0;
|
|
/* Start finding ISA boards here */
|
|
for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
|
|
int cap;
|
|
|
|
if (!(cap = mxserBoardCAP[b]))
|
|
continue;
|
|
|
|
retval = mxser_get_ISA_conf(cap, &hwconf);
|
|
|
|
if (retval != 0)
|
|
printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
|
|
mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
|
|
|
|
if (retval <= 0) {
|
|
if (retval == MXSER_ERR_IRQ)
|
|
printk(KERN_ERR "Invalid interrupt number, "
|
|
"board not configured\n");
|
|
else if (retval == MXSER_ERR_IRQ_CONFLIT)
|
|
printk(KERN_ERR "Invalid interrupt number, "
|
|
"board not configured\n");
|
|
else if (retval == MXSER_ERR_VECTOR)
|
|
printk(KERN_ERR "Invalid interrupt vector, "
|
|
"board not configured\n");
|
|
else if (retval == MXSER_ERR_IOADDR)
|
|
printk(KERN_ERR "Invalid I/O address, "
|
|
"board not configured\n");
|
|
|
|
continue;
|
|
}
|
|
|
|
hwconf.pciInfo.busNum = 0;
|
|
hwconf.pciInfo.devNum = 0;
|
|
hwconf.pciInfo.pdev = NULL;
|
|
|
|
mxser_getcfg(m, &hwconf);
|
|
/*
|
|
* init mxsercfg first,
|
|
* or mxsercfg data is not correct on ISR.
|
|
*/
|
|
/* mxser_initbrd will hook ISR. */
|
|
if (mxser_initbrd(m, &hwconf) < 0)
|
|
continue;
|
|
|
|
m++;
|
|
}
|
|
|
|
/* Start finding ISA boards from module arg */
|
|
for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
|
|
int cap;
|
|
|
|
if (!(cap = ioaddr[b]))
|
|
continue;
|
|
|
|
retval = mxser_get_ISA_conf(cap, &hwconf);
|
|
|
|
if (retval != 0)
|
|
printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
|
|
mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
|
|
|
|
if (retval <= 0) {
|
|
if (retval == MXSER_ERR_IRQ)
|
|
printk(KERN_ERR "Invalid interrupt number, "
|
|
"board not configured\n");
|
|
else if (retval == MXSER_ERR_IRQ_CONFLIT)
|
|
printk(KERN_ERR "Invalid interrupt number, "
|
|
"board not configured\n");
|
|
else if (retval == MXSER_ERR_VECTOR)
|
|
printk(KERN_ERR "Invalid interrupt vector, "
|
|
"board not configured\n");
|
|
else if (retval == MXSER_ERR_IOADDR)
|
|
printk(KERN_ERR "Invalid I/O address, "
|
|
"board not configured\n");
|
|
|
|
continue;
|
|
}
|
|
|
|
hwconf.pciInfo.busNum = 0;
|
|
hwconf.pciInfo.devNum = 0;
|
|
hwconf.pciInfo.pdev = NULL;
|
|
|
|
mxser_getcfg(m, &hwconf);
|
|
/*
|
|
* init mxsercfg first,
|
|
* or mxsercfg data is not correct on ISR.
|
|
*/
|
|
/* mxser_initbrd will hook ISR. */
|
|
if (mxser_initbrd(m, &hwconf) < 0)
|
|
continue;
|
|
|
|
m++;
|
|
}
|
|
|
|
/* start finding PCI board here */
|
|
#ifdef CONFIG_PCI
|
|
n = ARRAY_SIZE(mxser_pcibrds) - 1;
|
|
index = 0;
|
|
b = 0;
|
|
while (b < n) {
|
|
pdev = pci_find_device(mxser_pcibrds[b].vendor,
|
|
mxser_pcibrds[b].device, pdev);
|
|
if (pdev == NULL) {
|
|
b++;
|
|
continue;
|
|
}
|
|
hwconf.pciInfo.busNum = busnum = pdev->bus->number;
|
|
hwconf.pciInfo.devNum = devnum = PCI_SLOT(pdev->devfn) << 3;
|
|
hwconf.pciInfo.pdev = pdev;
|
|
printk(KERN_INFO "Found MOXA %s board(BusNo=%d,DevNo=%d)\n",
|
|
mxser_brdname[(int) (mxser_pcibrds[b].driver_data) - 1],
|
|
busnum, devnum >> 3);
|
|
index++;
|
|
if (m >= MXSER_BOARDS)
|
|
printk(KERN_ERR
|
|
"Too many Smartio/Industio family boards find "
|
|
"(maximum %d), board not configured\n",
|
|
MXSER_BOARDS);
|
|
else {
|
|
if (pci_enable_device(pdev)) {
|
|
printk(KERN_ERR "Moxa SmartI/O PCI enable "
|
|
"fail !\n");
|
|
continue;
|
|
}
|
|
retval = mxser_get_PCI_conf(busnum, devnum,
|
|
(int)mxser_pcibrds[b].driver_data,
|
|
&hwconf);
|
|
if (retval < 0) {
|
|
if (retval == MXSER_ERR_IRQ)
|
|
printk(KERN_ERR
|
|
"Invalid interrupt number, "
|
|
"board not configured\n");
|
|
else if (retval == MXSER_ERR_IRQ_CONFLIT)
|
|
printk(KERN_ERR
|
|
"Invalid interrupt number, "
|
|
"board not configured\n");
|
|
else if (retval == MXSER_ERR_VECTOR)
|
|
printk(KERN_ERR
|
|
"Invalid interrupt vector, "
|
|
"board not configured\n");
|
|
else if (retval == MXSER_ERR_IOADDR)
|
|
printk(KERN_ERR
|
|
"Invalid I/O address, "
|
|
"board not configured\n");
|
|
continue;
|
|
}
|
|
mxser_getcfg(m, &hwconf);
|
|
/* init mxsercfg first,
|
|
* or mxsercfg data is not correct on ISR.
|
|
*/
|
|
/* mxser_initbrd will hook ISR. */
|
|
if (mxser_initbrd(m, &hwconf) < 0)
|
|
continue;
|
|
m++;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
retval = tty_register_driver(mxvar_sdriver);
|
|
if (retval) {
|
|
printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family"
|
|
" driver !\n");
|
|
put_tty_driver(mxvar_sdriver);
|
|
|
|
for (i = 0; i < MXSER_BOARDS; i++) {
|
|
if (mxsercfg[i].board_type == -1)
|
|
continue;
|
|
else {
|
|
free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
|
|
/* todo: release io, vector */
|
|
}
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void mxser_do_softint(void *private_)
|
|
{
|
|
struct mxser_struct *info = private_;
|
|
struct tty_struct *tty;
|
|
|
|
tty = info->tty;
|
|
|
|
if (tty) {
|
|
if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
|
|
tty_wakeup(tty);
|
|
if (test_and_clear_bit(MXSER_EVENT_HANGUP, &info->event))
|
|
tty_hangup(tty);
|
|
}
|
|
}
|
|
|
|
static unsigned char mxser_get_msr(int baseaddr, int mode, int port, struct mxser_struct *info)
|
|
{
|
|
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;
|
|
}
|
|
|
|
/*
|
|
* 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_struct *info;
|
|
int retval, line;
|
|
|
|
/* initialize driver_data in case something fails */
|
|
tty->driver_data = NULL;
|
|
|
|
line = tty->index;
|
|
if (line == MXSER_PORTS)
|
|
return 0;
|
|
if (line < 0 || line > MXSER_PORTS)
|
|
return -ENODEV;
|
|
info = mxvar_table + line;
|
|
if (!info->base)
|
|
return -ENODEV;
|
|
|
|
tty->driver_data = info;
|
|
info->tty = tty;
|
|
/*
|
|
* Start up serial port
|
|
*/
|
|
retval = mxser_startup(info);
|
|
if (retval)
|
|
return retval;
|
|
|
|
retval = mxser_block_til_ready(tty, filp, info);
|
|
if (retval)
|
|
return retval;
|
|
|
|
info->count++;
|
|
|
|
if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
|
|
if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
|
|
*tty->termios = info->normal_termios;
|
|
else
|
|
*tty->termios = info->callout_termios;
|
|
mxser_change_speed(info, NULL);
|
|
}
|
|
|
|
info->session = current->signal->session;
|
|
info->pgrp = process_group(current);
|
|
|
|
/*
|
|
status = mxser_get_msr(info->base, 0, info->port);
|
|
mxser_check_modem_status(info, status);
|
|
*/
|
|
|
|
/* unmark here for very high baud rate (ex. 921600 bps) used */
|
|
tty->low_latency = 1;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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_struct *info = tty->driver_data;
|
|
|
|
unsigned long timeout;
|
|
unsigned long flags;
|
|
struct tty_ldisc *ld;
|
|
|
|
if (tty->index == MXSER_PORTS)
|
|
return;
|
|
if (!info)
|
|
return;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
|
|
if (tty_hung_up_p(filp)) {
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
return;
|
|
}
|
|
if ((tty->count == 1) && (info->count != 1)) {
|
|
/*
|
|
* Uh, oh. tty->count is 1, which means that the tty
|
|
* structure will be freed. Info->count should always
|
|
* be one in these conditions. If it's greater than
|
|
* one, we've got real problems, since it means the
|
|
* serial port won't be shutdown.
|
|
*/
|
|
printk(KERN_ERR "mxser_close: bad serial port count; "
|
|
"tty->count is 1, info->count is %d\n", info->count);
|
|
info->count = 1;
|
|
}
|
|
if (--info->count < 0) {
|
|
printk(KERN_ERR "mxser_close: bad serial port count for "
|
|
"ttys%d: %d\n", info->port, info->count);
|
|
info->count = 0;
|
|
}
|
|
if (info->count) {
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
return;
|
|
}
|
|
info->flags |= ASYNC_CLOSING;
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
/*
|
|
* Save the termios structure, since this port may have
|
|
* separate termios for callout and dialin.
|
|
*/
|
|
if (info->flags & ASYNC_NORMAL_ACTIVE)
|
|
info->normal_termios = *tty->termios;
|
|
/*
|
|
* Now we wait for the transmit buffer to clear; and we notify
|
|
* the line discipline to only process XON/XOFF characters.
|
|
*/
|
|
tty->closing = 1;
|
|
if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
|
|
tty_wait_until_sent(tty, info->closing_wait);
|
|
/*
|
|
* 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->IsMoxaMustChipFlag)
|
|
info->IER &= ~MOXA_MUST_RECV_ISR;
|
|
/* by William
|
|
info->read_status_mask &= ~UART_LSR_DR;
|
|
*/
|
|
if (info->flags & ASYNC_INITIALIZED) {
|
|
outb(info->IER, info->base + 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->base + UART_LSR) & UART_LSR_TEMT)) {
|
|
schedule_timeout_interruptible(5);
|
|
if (time_after(jiffies, timeout))
|
|
break;
|
|
}
|
|
}
|
|
mxser_shutdown(info);
|
|
|
|
if (tty->driver->flush_buffer)
|
|
tty->driver->flush_buffer(tty);
|
|
|
|
ld = tty_ldisc_ref(tty);
|
|
if (ld) {
|
|
if (ld->flush_buffer)
|
|
ld->flush_buffer(tty);
|
|
tty_ldisc_deref(ld);
|
|
}
|
|
|
|
tty->closing = 0;
|
|
info->event = 0;
|
|
info->tty = NULL;
|
|
if (info->blocked_open) {
|
|
if (info->close_delay)
|
|
schedule_timeout_interruptible(info->close_delay);
|
|
wake_up_interruptible(&info->open_wait);
|
|
}
|
|
|
|
info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
|
|
wake_up_interruptible(&info->close_wait);
|
|
|
|
}
|
|
|
|
static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
|
|
{
|
|
int c, total = 0;
|
|
struct mxser_struct *info = tty->driver_data;
|
|
unsigned long flags;
|
|
|
|
if (!info->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->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 && !(info->IER & UART_IER_THRI)) {
|
|
if (!tty->hw_stopped ||
|
|
(info->type == PORT_16550A) ||
|
|
(info->IsMoxaMustChipFlag)) {
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
info->IER |= UART_IER_THRI;
|
|
outb(info->IER, info->base + UART_IER);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
}
|
|
}
|
|
return total;
|
|
}
|
|
|
|
static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
|
|
{
|
|
struct mxser_struct *info = tty->driver_data;
|
|
unsigned long flags;
|
|
|
|
if (!info->xmit_buf)
|
|
return;
|
|
|
|
if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
|
|
return;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
info->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 && !(info->IER & UART_IER_THRI)) {
|
|
if (!tty->hw_stopped ||
|
|
(info->type == PORT_16550A) ||
|
|
info->IsMoxaMustChipFlag) {
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
info->IER |= UART_IER_THRI;
|
|
outb(info->IER, info->base + UART_IER);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void mxser_flush_chars(struct tty_struct *tty)
|
|
{
|
|
struct mxser_struct *info = tty->driver_data;
|
|
unsigned long flags;
|
|
|
|
if (info->xmit_cnt <= 0 ||
|
|
tty->stopped ||
|
|
!info->xmit_buf ||
|
|
(tty->hw_stopped &&
|
|
(info->type != PORT_16550A) &&
|
|
(!info->IsMoxaMustChipFlag)
|
|
))
|
|
return;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
|
|
info->IER |= UART_IER_THRI;
|
|
outb(info->IER, info->base + UART_IER);
|
|
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
}
|
|
|
|
static int mxser_write_room(struct tty_struct *tty)
|
|
{
|
|
struct mxser_struct *info = tty->driver_data;
|
|
int ret;
|
|
|
|
ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
|
|
if (ret < 0)
|
|
ret = 0;
|
|
return ret;
|
|
}
|
|
|
|
static int mxser_chars_in_buffer(struct tty_struct *tty)
|
|
{
|
|
struct mxser_struct *info = tty->driver_data;
|
|
return info->xmit_cnt;
|
|
}
|
|
|
|
static void mxser_flush_buffer(struct tty_struct *tty)
|
|
{
|
|
struct mxser_struct *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;
|
|
|
|
/* below added by shinhay */
|
|
fcr = inb(info->base + UART_FCR);
|
|
outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
|
|
info->base + UART_FCR);
|
|
outb(fcr, info->base + UART_FCR);
|
|
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
/* above added by shinhay */
|
|
|
|
wake_up_interruptible(&tty->write_wait);
|
|
if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
|
|
(tty->ldisc.write_wakeup) (tty);
|
|
}
|
|
|
|
static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct mxser_struct *info = tty->driver_data;
|
|
int retval;
|
|
struct async_icount cprev, cnow; /* kernel counter temps */
|
|
struct serial_icounter_struct __user *p_cuser;
|
|
unsigned long templ;
|
|
unsigned long flags;
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
if (tty->index == MXSER_PORTS)
|
|
return mxser_ioctl_special(cmd, argp);
|
|
|
|
/* following add by Victor Yu. 01-05-2004 */
|
|
if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
|
|
int opmode, p;
|
|
static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
|
|
int shiftbit;
|
|
unsigned char val, mask;
|
|
|
|
p = info->port % 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;
|
|
val = inb(info->opmode_ioaddr);
|
|
val &= mask;
|
|
val |= (opmode << shiftbit);
|
|
outb(val, info->opmode_ioaddr);
|
|
} else {
|
|
shiftbit = p * 2;
|
|
opmode = inb(info->opmode_ioaddr) >> shiftbit;
|
|
opmode &= OP_MODE_MASK;
|
|
if (copy_to_user(argp, &opmode, sizeof(int)))
|
|
return -EFAULT;
|
|
}
|
|
return 0;
|
|
}
|
|
/* above add by Victor Yu. 01-05-2004 */
|
|
|
|
if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
|
|
if (tty->flags & (1 << TTY_IO_ERROR))
|
|
return -EIO;
|
|
}
|
|
switch (cmd) {
|
|
case TCSBRK: /* SVID version: non-zero arg --> no break */
|
|
retval = tty_check_change(tty);
|
|
if (retval)
|
|
return retval;
|
|
tty_wait_until_sent(tty, 0);
|
|
if (!arg)
|
|
mxser_send_break(info, HZ / 4); /* 1/4 second */
|
|
return 0;
|
|
case TCSBRKP: /* support for POSIX tcsendbreak() */
|
|
retval = tty_check_change(tty);
|
|
if (retval)
|
|
return retval;
|
|
tty_wait_until_sent(tty, 0);
|
|
mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
|
|
return 0;
|
|
case TIOCGSOFTCAR:
|
|
return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
|
|
case TIOCSSOFTCAR:
|
|
if (get_user(templ, (unsigned long __user *) argp))
|
|
return -EFAULT;
|
|
arg = templ;
|
|
tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
|
|
return 0;
|
|
case TIOCGSERIAL:
|
|
return mxser_get_serial_info(info, argp);
|
|
case TIOCSSERIAL:
|
|
return mxser_set_serial_info(info, argp);
|
|
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: {
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
int ret;
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
cprev = info->icount; /* note the counters on entry */
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
|
|
add_wait_queue(&info->delta_msr_wait, &wait);
|
|
while (1) {
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
cnow = info->icount; /* atomic copy */
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
if (((arg & TIOCM_RNG) &&
|
|
(cnow.rng != cprev.rng)) ||
|
|
((arg & TIOCM_DSR) &&
|
|
(cnow.dsr != cprev.dsr)) ||
|
|
((arg & TIOCM_CD) &&
|
|
(cnow.dcd != cprev.dcd)) ||
|
|
((arg & TIOCM_CTS) &&
|
|
(cnow.cts != cprev.cts))) {
|
|
ret = 0;
|
|
break;
|
|
}
|
|
/* see if a signal did it */
|
|
if (signal_pending(current)) {
|
|
ret = -ERESTARTSYS;
|
|
break;
|
|
}
|
|
cprev = cnow;
|
|
}
|
|
current->state = TASK_RUNNING;
|
|
remove_wait_queue(&info->delta_msr_wait, &wait);
|
|
break;
|
|
}
|
|
/* NOTREACHED */
|
|
/*
|
|
* 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.
|
|
*/
|
|
case TIOCGICOUNT:
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
cnow = info->icount;
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
p_cuser = argp;
|
|
/* modified by casper 1/11/2000 */
|
|
if (put_user(cnow.frame, &p_cuser->frame))
|
|
return -EFAULT;
|
|
if (put_user(cnow.brk, &p_cuser->brk))
|
|
return -EFAULT;
|
|
if (put_user(cnow.overrun, &p_cuser->overrun))
|
|
return -EFAULT;
|
|
if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
|
|
return -EFAULT;
|
|
if (put_user(cnow.parity, &p_cuser->parity))
|
|
return -EFAULT;
|
|
if (put_user(cnow.rx, &p_cuser->rx))
|
|
return -EFAULT;
|
|
if (put_user(cnow.tx, &p_cuser->tx))
|
|
return -EFAULT;
|
|
put_user(cnow.cts, &p_cuser->cts);
|
|
put_user(cnow.dsr, &p_cuser->dsr);
|
|
put_user(cnow.rng, &p_cuser->rng);
|
|
put_user(cnow.dcd, &p_cuser->dcd);
|
|
return 0;
|
|
case MOXA_HighSpeedOn:
|
|
return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
|
|
case MOXA_SDS_RSTICOUNTER: {
|
|
info->mon_data.rxcnt = 0;
|
|
info->mon_data.txcnt = 0;
|
|
return 0;
|
|
}
|
|
/* (above) added by James. */
|
|
case MOXA_ASPP_SETBAUD:{
|
|
long baud;
|
|
if (get_user(baud, (long __user *)argp))
|
|
return -EFAULT;
|
|
mxser_set_baud(info, baud);
|
|
return 0;
|
|
}
|
|
case MOXA_ASPP_GETBAUD:
|
|
if (copy_to_user(argp, &info->realbaud, sizeof(long)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
|
|
case MOXA_ASPP_OQUEUE:{
|
|
int len, lsr;
|
|
|
|
len = mxser_chars_in_buffer(tty);
|
|
|
|
lsr = inb(info->base + UART_LSR) & UART_LSR_TEMT;
|
|
|
|
len += (lsr ? 0 : 1);
|
|
|
|
if (copy_to_user(argp, &len, sizeof(int)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
case MOXA_ASPP_MON: {
|
|
int mcr, status;
|
|
|
|
/* info->mon_data.ser_param = tty->termios->c_cflag; */
|
|
|
|
status = mxser_get_msr(info->base, 1, info->port, info);
|
|
mxser_check_modem_status(info, status);
|
|
|
|
mcr = inb(info->base + UART_MCR);
|
|
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 (info->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 (copy_to_user(argp, &info->err_shadow,
|
|
sizeof(unsigned char)))
|
|
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[info->port] = method;
|
|
if (copy_to_user(argp, &method, sizeof(int)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#ifndef CMSPAR
|
|
#define CMSPAR 010000000000
|
|
#endif
|
|
|
|
static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
|
|
{
|
|
int i, result, status;
|
|
|
|
switch (cmd) {
|
|
case MOXA_GET_CONF:
|
|
if (copy_to_user(argp, mxsercfg,
|
|
sizeof(struct mxser_hwconf) * 4))
|
|
return -EFAULT;
|
|
return 0;
|
|
case MOXA_GET_MAJOR:
|
|
if (copy_to_user(argp, &ttymajor, sizeof(int)))
|
|
return -EFAULT;
|
|
return 0;
|
|
|
|
case MOXA_GET_CUMAJOR:
|
|
if (copy_to_user(argp, &calloutmajor, sizeof(int)))
|
|
return -EFAULT;
|
|
return 0;
|
|
|
|
case MOXA_CHKPORTENABLE:
|
|
result = 0;
|
|
for (i = 0; i < MXSER_PORTS; i++) {
|
|
if (mxvar_table[i].base)
|
|
result |= (1 << i);
|
|
}
|
|
return put_user(result, (unsigned long __user *)argp);
|
|
case MOXA_GETDATACOUNT:
|
|
if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
|
|
return -EFAULT;
|
|
return 0;
|
|
case MOXA_GETMSTATUS:
|
|
for (i = 0; i < MXSER_PORTS; i++) {
|
|
GMStatus[i].ri = 0;
|
|
if (!mxvar_table[i].base) {
|
|
GMStatus[i].dcd = 0;
|
|
GMStatus[i].dsr = 0;
|
|
GMStatus[i].cts = 0;
|
|
continue;
|
|
}
|
|
|
|
if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios)
|
|
GMStatus[i].cflag = mxvar_table[i].normal_termios.c_cflag;
|
|
else
|
|
GMStatus[i].cflag = mxvar_table[i].tty->termios->c_cflag;
|
|
|
|
status = inb(mxvar_table[i].base + UART_MSR);
|
|
if (status & 0x80 /*UART_MSR_DCD */ )
|
|
GMStatus[i].dcd = 1;
|
|
else
|
|
GMStatus[i].dcd = 0;
|
|
|
|
if (status & 0x20 /*UART_MSR_DSR */ )
|
|
GMStatus[i].dsr = 1;
|
|
else
|
|
GMStatus[i].dsr = 0;
|
|
|
|
|
|
if (status & 0x10 /*UART_MSR_CTS */ )
|
|
GMStatus[i].cts = 1;
|
|
else
|
|
GMStatus[i].cts = 0;
|
|
}
|
|
if (copy_to_user(argp, GMStatus,
|
|
sizeof(struct mxser_mstatus) * MXSER_PORTS))
|
|
return -EFAULT;
|
|
return 0;
|
|
case MOXA_ASPP_MON_EXT: {
|
|
int status;
|
|
int opmode, p;
|
|
int shiftbit;
|
|
unsigned cflag, iflag;
|
|
|
|
for (i = 0; i < MXSER_PORTS; i++) {
|
|
if (!mxvar_table[i].base)
|
|
continue;
|
|
|
|
status = mxser_get_msr(mxvar_table[i].base, 0,
|
|
i, &(mxvar_table[i]));
|
|
/*
|
|
mxser_check_modem_status(&mxvar_table[i],
|
|
status);
|
|
*/
|
|
if (status & UART_MSR_TERI)
|
|
mxvar_table[i].icount.rng++;
|
|
if (status & UART_MSR_DDSR)
|
|
mxvar_table[i].icount.dsr++;
|
|
if (status & UART_MSR_DDCD)
|
|
mxvar_table[i].icount.dcd++;
|
|
if (status & UART_MSR_DCTS)
|
|
mxvar_table[i].icount.cts++;
|
|
|
|
mxvar_table[i].mon_data.modem_status = status;
|
|
mon_data_ext.rx_cnt[i] = mxvar_table[i].mon_data.rxcnt;
|
|
mon_data_ext.tx_cnt[i] = mxvar_table[i].mon_data.txcnt;
|
|
mon_data_ext.up_rxcnt[i] = mxvar_table[i].mon_data.up_rxcnt;
|
|
mon_data_ext.up_txcnt[i] = mxvar_table[i].mon_data.up_txcnt;
|
|
mon_data_ext.modem_status[i] = mxvar_table[i].mon_data.modem_status;
|
|
mon_data_ext.baudrate[i] = mxvar_table[i].realbaud;
|
|
|
|
if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios) {
|
|
cflag = mxvar_table[i].normal_termios.c_cflag;
|
|
iflag = mxvar_table[i].normal_termios.c_iflag;
|
|
} else {
|
|
cflag = mxvar_table[i].tty->termios->c_cflag;
|
|
iflag = mxvar_table[i].tty->termios->c_iflag;
|
|
}
|
|
|
|
mon_data_ext.databits[i] = cflag & CSIZE;
|
|
|
|
mon_data_ext.stopbits[i] = cflag & CSTOPB;
|
|
|
|
mon_data_ext.parity[i] = cflag & (PARENB | PARODD | CMSPAR);
|
|
|
|
mon_data_ext.flowctrl[i] = 0x00;
|
|
|
|
if (cflag & CRTSCTS)
|
|
mon_data_ext.flowctrl[i] |= 0x03;
|
|
|
|
if (iflag & (IXON | IXOFF))
|
|
mon_data_ext.flowctrl[i] |= 0x0C;
|
|
|
|
if (mxvar_table[i].type == PORT_16550A)
|
|
mon_data_ext.fifo[i] = 1;
|
|
else
|
|
mon_data_ext.fifo[i] = 0;
|
|
|
|
p = i % 4;
|
|
shiftbit = p * 2;
|
|
opmode = inb(mxvar_table[i].opmode_ioaddr) >> shiftbit;
|
|
opmode &= OP_MODE_MASK;
|
|
|
|
mon_data_ext.iftype[i] = opmode;
|
|
|
|
}
|
|
if (copy_to_user(argp, &mon_data_ext, sizeof(struct mxser_mon_ext)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
|
|
}
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void mxser_stoprx(struct tty_struct *tty)
|
|
{
|
|
struct mxser_struct *info = tty->driver_data;
|
|
/* unsigned long flags; */
|
|
|
|
info->ldisc_stop_rx = 1;
|
|
if (I_IXOFF(tty)) {
|
|
/* MX_LOCK(&info->slock); */
|
|
/* following add by Victor Yu. 09-02-2002 */
|
|
if (info->IsMoxaMustChipFlag) {
|
|
info->IER &= ~MOXA_MUST_RECV_ISR;
|
|
outb(info->IER, info->base + UART_IER);
|
|
} else {
|
|
/* above add by Victor Yu. 09-02-2002 */
|
|
info->x_char = STOP_CHAR(tty);
|
|
/* mask by Victor Yu. 09-02-2002 */
|
|
/* outb(info->IER, 0); */
|
|
outb(0, info->base + UART_IER);
|
|
info->IER |= UART_IER_THRI;
|
|
/* force Tx interrupt */
|
|
outb(info->IER, info->base + UART_IER);
|
|
} /* add by Victor Yu. 09-02-2002 */
|
|
/* MX_UNLOCK(&info->slock); */
|
|
}
|
|
|
|
if (info->tty->termios->c_cflag & CRTSCTS) {
|
|
/* MX_LOCK(&info->slock); */
|
|
info->MCR &= ~UART_MCR_RTS;
|
|
outb(info->MCR, info->base + UART_MCR);
|
|
/* MX_UNLOCK(&info->slock); */
|
|
}
|
|
}
|
|
|
|
static void mxser_startrx(struct tty_struct *tty)
|
|
{
|
|
struct mxser_struct *info = tty->driver_data;
|
|
/* unsigned long flags; */
|
|
|
|
info->ldisc_stop_rx = 0;
|
|
if (I_IXOFF(tty)) {
|
|
if (info->x_char)
|
|
info->x_char = 0;
|
|
else {
|
|
/* MX_LOCK(&info->slock); */
|
|
|
|
/* following add by Victor Yu. 09-02-2002 */
|
|
if (info->IsMoxaMustChipFlag) {
|
|
info->IER |= MOXA_MUST_RECV_ISR;
|
|
outb(info->IER, info->base + UART_IER);
|
|
} else {
|
|
/* above add by Victor Yu. 09-02-2002 */
|
|
|
|
info->x_char = START_CHAR(tty);
|
|
/* mask by Victor Yu. 09-02-2002 */
|
|
/* outb(info->IER, 0); */
|
|
/* add by Victor Yu. 09-02-2002 */
|
|
outb(0, info->base + UART_IER);
|
|
/* force Tx interrupt */
|
|
info->IER |= UART_IER_THRI;
|
|
outb(info->IER, info->base + UART_IER);
|
|
} /* add by Victor Yu. 09-02-2002 */
|
|
/* MX_UNLOCK(&info->slock); */
|
|
}
|
|
}
|
|
|
|
if (info->tty->termios->c_cflag & CRTSCTS) {
|
|
/* MX_LOCK(&info->slock); */
|
|
info->MCR |= UART_MCR_RTS;
|
|
outb(info->MCR, info->base + UART_MCR);
|
|
/* MX_UNLOCK(&info->slock); */
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
/* struct mxser_struct *info = tty->driver_data; */
|
|
/* unsigned long flags; */
|
|
|
|
/* MX_LOCK(&info->slock); */
|
|
mxser_stoprx(tty);
|
|
/* MX_UNLOCK(&info->slock); */
|
|
}
|
|
|
|
static void mxser_unthrottle(struct tty_struct *tty)
|
|
{
|
|
/* struct mxser_struct *info = tty->driver_data; */
|
|
/* unsigned long flags; */
|
|
|
|
/* MX_LOCK(&info->slock); */
|
|
mxser_startrx(tty);
|
|
/* MX_UNLOCK(&info->slock); */
|
|
}
|
|
|
|
static void mxser_set_termios(struct tty_struct *tty, struct termios *old_termios)
|
|
{
|
|
struct mxser_struct *info = tty->driver_data;
|
|
unsigned long flags;
|
|
|
|
if ((tty->termios->c_cflag != old_termios->c_cflag) ||
|
|
(RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
|
|
|
|
mxser_change_speed(info, old_termios);
|
|
|
|
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;
|
|
|
|
/* following add by Victor Yu. 09-02-2002 */
|
|
if (info->IsMoxaMustChipFlag) {
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
}
|
|
/* above add by Victor Yu. 09-02-2002 */
|
|
|
|
mxser_start(tty);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* 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_struct *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->base + UART_IER);
|
|
}
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
}
|
|
|
|
static void mxser_start(struct tty_struct *tty)
|
|
{
|
|
struct mxser_struct *info = tty->driver_data;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
|
|
info->IER |= UART_IER_THRI;
|
|
outb(info->IER, info->base + UART_IER);
|
|
}
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
}
|
|
|
|
/*
|
|
* mxser_wait_until_sent() --- wait until the transmitter is empty
|
|
*/
|
|
static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
|
|
{
|
|
struct mxser_struct *info = tty->driver_data;
|
|
unsigned long orig_jiffies, char_time;
|
|
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;
|
|
#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
|
|
printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
|
|
timeout, char_time);
|
|
printk("jiff=%lu...", jiffies);
|
|
#endif
|
|
while (!((lsr = inb(info->base + UART_LSR)) & UART_LSR_TEMT)) {
|
|
#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
|
|
printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
|
|
#endif
|
|
schedule_timeout_interruptible(char_time);
|
|
if (signal_pending(current))
|
|
break;
|
|
if (timeout && time_after(jiffies, orig_jiffies + timeout))
|
|
break;
|
|
}
|
|
set_current_state(TASK_RUNNING);
|
|
|
|
#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
|
|
printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
|
|
#endif
|
|
}
|
|
|
|
|
|
/*
|
|
* This routine is called by tty_hangup() when a hangup is signaled.
|
|
*/
|
|
void mxser_hangup(struct tty_struct *tty)
|
|
{
|
|
struct mxser_struct *info = tty->driver_data;
|
|
|
|
mxser_flush_buffer(tty);
|
|
mxser_shutdown(info);
|
|
info->event = 0;
|
|
info->count = 0;
|
|
info->flags &= ~ASYNC_NORMAL_ACTIVE;
|
|
info->tty = NULL;
|
|
wake_up_interruptible(&info->open_wait);
|
|
}
|
|
|
|
|
|
/* added by James 03-12-2004. */
|
|
/*
|
|
* mxser_rs_break() --- routine which turns the break handling on or off
|
|
*/
|
|
static void mxser_rs_break(struct tty_struct *tty, int break_state)
|
|
{
|
|
struct mxser_struct *info = tty->driver_data;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
if (break_state == -1)
|
|
outb(inb(info->base + UART_LCR) | UART_LCR_SBC,
|
|
info->base + UART_LCR);
|
|
else
|
|
outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC,
|
|
info->base + UART_LCR);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
}
|
|
|
|
/* (above) added by James. */
|
|
|
|
|
|
/*
|
|
* This is the serial driver's generic interrupt routine
|
|
*/
|
|
static irqreturn_t mxser_interrupt(int irq, void *dev_id, struct pt_regs *regs)
|
|
{
|
|
int status, iir, i;
|
|
struct mxser_struct *info;
|
|
struct mxser_struct *port;
|
|
int max, irqbits, bits, msr;
|
|
int pass_counter = 0;
|
|
int handled = IRQ_NONE;
|
|
|
|
port = NULL;
|
|
/* spin_lock(&gm_lock); */
|
|
|
|
for (i = 0; i < MXSER_BOARDS; i++) {
|
|
if (dev_id == &(mxvar_table[i * MXSER_PORTS_PER_BOARD])) {
|
|
port = dev_id;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (i == MXSER_BOARDS)
|
|
goto irq_stop;
|
|
if (port == 0)
|
|
goto irq_stop;
|
|
max = mxser_numports[mxsercfg[i].board_type - 1];
|
|
while (1) {
|
|
irqbits = inb(port->vector) & port->vectormask;
|
|
if (irqbits == port->vectormask)
|
|
break;
|
|
|
|
handled = IRQ_HANDLED;
|
|
for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
|
|
if (irqbits == port->vectormask)
|
|
break;
|
|
if (bits & irqbits)
|
|
continue;
|
|
info = port + i;
|
|
|
|
/* following add by Victor Yu. 09-13-2002 */
|
|
iir = inb(info->base + UART_IIR);
|
|
if (iir & UART_IIR_NO_INT)
|
|
continue;
|
|
iir &= MOXA_MUST_IIR_MASK;
|
|
if (!info->tty) {
|
|
status = inb(info->base + UART_LSR);
|
|
outb(0x27, info->base + UART_FCR);
|
|
inb(info->base + UART_MSR);
|
|
continue;
|
|
}
|
|
/* above add by Victor Yu. 09-13-2002 */
|
|
/*
|
|
if (info->tty->flip.count < TTY_FLIPBUF_SIZE / 4) {
|
|
info->IER |= MOXA_MUST_RECV_ISR;
|
|
outb(info->IER, info->base + UART_IER);
|
|
}
|
|
*/
|
|
|
|
|
|
/* mask by Victor Yu. 09-13-2002
|
|
if ( !info->tty ||
|
|
(inb(info->base + UART_IIR) & UART_IIR_NO_INT) )
|
|
continue;
|
|
*/
|
|
/* mask by Victor Yu. 09-02-2002
|
|
status = inb(info->base + UART_LSR) & info->read_status_mask;
|
|
*/
|
|
|
|
/* following add by Victor Yu. 09-02-2002 */
|
|
status = inb(info->base + UART_LSR);
|
|
|
|
if (status & UART_LSR_PE)
|
|
info->err_shadow |= NPPI_NOTIFY_PARITY;
|
|
if (status & UART_LSR_FE)
|
|
info->err_shadow |= NPPI_NOTIFY_FRAMING;
|
|
if (status & UART_LSR_OE)
|
|
info->err_shadow |= NPPI_NOTIFY_HW_OVERRUN;
|
|
if (status & UART_LSR_BI)
|
|
info->err_shadow |= NPPI_NOTIFY_BREAK;
|
|
|
|
if (info->IsMoxaMustChipFlag) {
|
|
/*
|
|
if ( (status & 0x02) && !(status & 0x01) ) {
|
|
outb(info->base+UART_FCR, 0x23);
|
|
continue;
|
|
}
|
|
*/
|
|
if (iir == MOXA_MUST_IIR_GDA ||
|
|
iir == MOXA_MUST_IIR_RDA ||
|
|
iir == MOXA_MUST_IIR_RTO ||
|
|
iir == MOXA_MUST_IIR_LSR)
|
|
mxser_receive_chars(info, &status);
|
|
|
|
} else {
|
|
/* above add by Victor Yu. 09-02-2002 */
|
|
|
|
status &= info->read_status_mask;
|
|
if (status & UART_LSR_DR)
|
|
mxser_receive_chars(info, &status);
|
|
}
|
|
msr = inb(info->base + UART_MSR);
|
|
if (msr & UART_MSR_ANY_DELTA) {
|
|
mxser_check_modem_status(info, msr);
|
|
}
|
|
/* following add by Victor Yu. 09-13-2002 */
|
|
if (info->IsMoxaMustChipFlag) {
|
|
if ((iir == 0x02) && (status & UART_LSR_THRE)) {
|
|
mxser_transmit_chars(info);
|
|
}
|
|
} else {
|
|
/* above add by Victor Yu. 09-13-2002 */
|
|
|
|
if (status & UART_LSR_THRE) {
|
|
/* 8-2-99 by William
|
|
if ( info->x_char || (info->xmit_cnt > 0) )
|
|
*/
|
|
mxser_transmit_chars(info);
|
|
}
|
|
}
|
|
}
|
|
if (pass_counter++ > MXSER_ISR_PASS_LIMIT) {
|
|
break; /* Prevent infinite loops */
|
|
}
|
|
}
|
|
|
|
irq_stop:
|
|
/* spin_unlock(&gm_lock); */
|
|
return handled;
|
|
}
|
|
|
|
static void mxser_receive_chars(struct mxser_struct *info, int *status)
|
|
{
|
|
struct tty_struct *tty = info->tty;
|
|
unsigned char ch, gdl;
|
|
int ignored = 0;
|
|
int cnt = 0;
|
|
int recv_room;
|
|
int max = 256;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
|
|
recv_room = tty->receive_room;
|
|
if ((recv_room == 0) && (!info->ldisc_stop_rx)) {
|
|
/* mxser_throttle(tty); */
|
|
mxser_stoprx(tty);
|
|
/* return; */
|
|
}
|
|
|
|
/* following add by Victor Yu. 09-02-2002 */
|
|
if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
|
|
|
|
if (*status & UART_LSR_SPECIAL) {
|
|
goto intr_old;
|
|
}
|
|
/* following add by Victor Yu. 02-11-2004 */
|
|
if (info->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID &&
|
|
(*status & MOXA_MUST_LSR_RERR))
|
|
goto intr_old;
|
|
/* above add by Victor Yu. 02-14-2004 */
|
|
if (*status & MOXA_MUST_LSR_RERR)
|
|
goto intr_old;
|
|
|
|
gdl = inb(info->base + MOXA_MUST_GDL_REGISTER);
|
|
|
|
/* add by Victor Yu. 02-11-2004 */
|
|
if (info->IsMoxaMustChipFlag == MOXA_MUST_MU150_HWID)
|
|
gdl &= MOXA_MUST_GDL_MASK;
|
|
if (gdl >= recv_room) {
|
|
if (!info->ldisc_stop_rx) {
|
|
/* mxser_throttle(tty); */
|
|
mxser_stoprx(tty);
|
|
}
|
|
/* return; */
|
|
}
|
|
while (gdl--) {
|
|
ch = inb(info->base + UART_RX);
|
|
tty_insert_flip_char(tty, ch, 0);
|
|
cnt++;
|
|
/*
|
|
if ((cnt >= HI_WATER) && (info->stop_rx == 0)) {
|
|
mxser_stoprx(tty);
|
|
info->stop_rx = 1;
|
|
break;
|
|
} */
|
|
}
|
|
goto end_intr;
|
|
}
|
|
intr_old:
|
|
/* above add by Victor Yu. 09-02-2002 */
|
|
|
|
do {
|
|
if (max-- < 0)
|
|
break;
|
|
/*
|
|
if ((cnt >= HI_WATER) && (info->stop_rx == 0)) {
|
|
mxser_stoprx(tty);
|
|
info->stop_rx=1;
|
|
break;
|
|
}
|
|
*/
|
|
|
|
ch = inb(info->base + UART_RX);
|
|
/* following add by Victor Yu. 09-02-2002 */
|
|
if (info->IsMoxaMustChipFlag && (*status & UART_LSR_OE) /*&& !(*status&UART_LSR_DR) */ )
|
|
outb(0x23, info->base + UART_FCR);
|
|
*status &= info->read_status_mask;
|
|
/* above add by Victor Yu. 09-02-2002 */
|
|
if (*status & info->ignore_status_mask) {
|
|
if (++ignored > 100)
|
|
break;
|
|
} else {
|
|
char flag = 0;
|
|
if (*status & UART_LSR_SPECIAL) {
|
|
if (*status & UART_LSR_BI) {
|
|
flag = TTY_BREAK;
|
|
/* added by casper 1/11/2000 */
|
|
info->icount.brk++;
|
|
/* */
|
|
if (info->flags & ASYNC_SAK)
|
|
do_SAK(tty);
|
|
} else if (*status & UART_LSR_PE) {
|
|
flag = TTY_PARITY;
|
|
/* added by casper 1/11/2000 */
|
|
info->icount.parity++;
|
|
/* */
|
|
} else if (*status & UART_LSR_FE) {
|
|
flag = TTY_FRAME;
|
|
/* added by casper 1/11/2000 */
|
|
info->icount.frame++;
|
|
/* */
|
|
} else if (*status & UART_LSR_OE) {
|
|
flag = TTY_OVERRUN;
|
|
/* added by casper 1/11/2000 */
|
|
info->icount.overrun++;
|
|
/* */
|
|
}
|
|
}
|
|
tty_insert_flip_char(tty, ch, flag);
|
|
cnt++;
|
|
if (cnt >= recv_room) {
|
|
if (!info->ldisc_stop_rx) {
|
|
/* mxser_throttle(tty); */
|
|
mxser_stoprx(tty);
|
|
}
|
|
break;
|
|
}
|
|
|
|
}
|
|
|
|
/* following add by Victor Yu. 09-02-2002 */
|
|
if (info->IsMoxaMustChipFlag)
|
|
break;
|
|
/* above add by Victor Yu. 09-02-2002 */
|
|
|
|
/* mask by Victor Yu. 09-02-2002
|
|
*status = inb(info->base + UART_LSR) & info->read_status_mask;
|
|
*/
|
|
/* following add by Victor Yu. 09-02-2002 */
|
|
*status = inb(info->base + UART_LSR);
|
|
/* above add by Victor Yu. 09-02-2002 */
|
|
} while (*status & UART_LSR_DR);
|
|
|
|
end_intr: /* add by Victor Yu. 09-02-2002 */
|
|
mxvar_log.rxcnt[info->port] += cnt;
|
|
info->mon_data.rxcnt += cnt;
|
|
info->mon_data.up_rxcnt += cnt;
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
|
|
tty_flip_buffer_push(tty);
|
|
}
|
|
|
|
static void mxser_transmit_chars(struct mxser_struct *info)
|
|
{
|
|
int count, cnt;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
|
|
if (info->x_char) {
|
|
outb(info->x_char, info->base + UART_TX);
|
|
info->x_char = 0;
|
|
mxvar_log.txcnt[info->port]++;
|
|
info->mon_data.txcnt++;
|
|
info->mon_data.up_txcnt++;
|
|
|
|
/* added by casper 1/11/2000 */
|
|
info->icount.tx++;
|
|
/* */
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
return;
|
|
}
|
|
|
|
if (info->xmit_buf == 0) {
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
return;
|
|
}
|
|
|
|
if ((info->xmit_cnt <= 0) || info->tty->stopped ||
|
|
(info->tty->hw_stopped &&
|
|
(info->type != PORT_16550A) &&
|
|
(!info->IsMoxaMustChipFlag))) {
|
|
info->IER &= ~UART_IER_THRI;
|
|
outb(info->IER, info->base + UART_IER);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
return;
|
|
}
|
|
|
|
cnt = info->xmit_cnt;
|
|
count = info->xmit_fifo_size;
|
|
do {
|
|
outb(info->xmit_buf[info->xmit_tail++],
|
|
info->base + UART_TX);
|
|
info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE - 1);
|
|
if (--info->xmit_cnt <= 0)
|
|
break;
|
|
} while (--count > 0);
|
|
mxvar_log.txcnt[info->port] += (cnt - info->xmit_cnt);
|
|
|
|
/* added by James 03-12-2004. */
|
|
info->mon_data.txcnt += (cnt - info->xmit_cnt);
|
|
info->mon_data.up_txcnt += (cnt - info->xmit_cnt);
|
|
/* (above) added by James. */
|
|
|
|
/* added by casper 1/11/2000 */
|
|
info->icount.tx += (cnt - info->xmit_cnt);
|
|
/* */
|
|
|
|
if (info->xmit_cnt < WAKEUP_CHARS) {
|
|
set_bit(MXSER_EVENT_TXLOW, &info->event);
|
|
schedule_work(&info->tqueue);
|
|
}
|
|
if (info->xmit_cnt <= 0) {
|
|
info->IER &= ~UART_IER_THRI;
|
|
outb(info->IER, info->base + UART_IER);
|
|
}
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
}
|
|
|
|
static void mxser_check_modem_status(struct mxser_struct *info, int status)
|
|
{
|
|
/* update input line counters */
|
|
if (status & UART_MSR_TERI)
|
|
info->icount.rng++;
|
|
if (status & UART_MSR_DDSR)
|
|
info->icount.dsr++;
|
|
if (status & UART_MSR_DDCD)
|
|
info->icount.dcd++;
|
|
if (status & UART_MSR_DCTS)
|
|
info->icount.cts++;
|
|
info->mon_data.modem_status = status;
|
|
wake_up_interruptible(&info->delta_msr_wait);
|
|
|
|
if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
|
|
if (status & UART_MSR_DCD)
|
|
wake_up_interruptible(&info->open_wait);
|
|
schedule_work(&info->tqueue);
|
|
}
|
|
|
|
if (info->flags & ASYNC_CTS_FLOW) {
|
|
if (info->tty->hw_stopped) {
|
|
if (status & UART_MSR_CTS) {
|
|
info->tty->hw_stopped = 0;
|
|
|
|
if ((info->type != PORT_16550A) &&
|
|
(!info->IsMoxaMustChipFlag)) {
|
|
info->IER |= UART_IER_THRI;
|
|
outb(info->IER, info->base + UART_IER);
|
|
}
|
|
set_bit(MXSER_EVENT_TXLOW, &info->event);
|
|
schedule_work(&info->tqueue); }
|
|
} else {
|
|
if (!(status & UART_MSR_CTS)) {
|
|
info->tty->hw_stopped = 1;
|
|
if ((info->type != PORT_16550A) &&
|
|
(!info->IsMoxaMustChipFlag)) {
|
|
info->IER &= ~UART_IER_THRI;
|
|
outb(info->IER, info->base + UART_IER);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_struct *info)
|
|
{
|
|
DECLARE_WAITQUEUE(wait, current);
|
|
int retval;
|
|
int do_clocal = 0;
|
|
unsigned long flags;
|
|
|
|
/*
|
|
* If non-blocking mode is set, or the port is not enabled,
|
|
* then make the check up front and then exit.
|
|
*/
|
|
if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
|
|
info->flags |= ASYNC_NORMAL_ACTIVE;
|
|
return 0;
|
|
}
|
|
|
|
if (tty->termios->c_cflag & CLOCAL)
|
|
do_clocal = 1;
|
|
|
|
/*
|
|
* Block waiting for the carrier detect and the line to become
|
|
* free (i.e., not in use by the callout). While we are in
|
|
* this loop, info->count is dropped by one, so that
|
|
* mxser_close() knows when to free things. We restore it upon
|
|
* exit, either normal or abnormal.
|
|
*/
|
|
retval = 0;
|
|
add_wait_queue(&info->open_wait, &wait);
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
if (!tty_hung_up_p(filp))
|
|
info->count--;
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
info->blocked_open++;
|
|
while (1) {
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
outb(inb(info->base + UART_MCR) |
|
|
UART_MCR_DTR | UART_MCR_RTS, info->base + UART_MCR);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)) {
|
|
if (info->flags & ASYNC_HUP_NOTIFY)
|
|
retval = -EAGAIN;
|
|
else
|
|
retval = -ERESTARTSYS;
|
|
break;
|
|
}
|
|
if (!(info->flags & ASYNC_CLOSING) &&
|
|
(do_clocal ||
|
|
(inb(info->base + UART_MSR) & UART_MSR_DCD)))
|
|
break;
|
|
if (signal_pending(current)) {
|
|
retval = -ERESTARTSYS;
|
|
break;
|
|
}
|
|
schedule();
|
|
}
|
|
set_current_state(TASK_RUNNING);
|
|
remove_wait_queue(&info->open_wait, &wait);
|
|
if (!tty_hung_up_p(filp))
|
|
info->count++;
|
|
info->blocked_open--;
|
|
if (retval)
|
|
return retval;
|
|
info->flags |= ASYNC_NORMAL_ACTIVE;
|
|
return 0;
|
|
}
|
|
|
|
static int mxser_startup(struct mxser_struct *info)
|
|
{
|
|
unsigned long page;
|
|
unsigned long flags;
|
|
|
|
page = __get_free_page(GFP_KERNEL);
|
|
if (!page)
|
|
return -ENOMEM;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
|
|
if (info->flags & ASYNC_INITIALIZED) {
|
|
free_page(page);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
return 0;
|
|
}
|
|
|
|
if (!info->base || !info->type) {
|
|
if (info->tty)
|
|
set_bit(TTY_IO_ERROR, &info->tty->flags);
|
|
free_page(page);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
return 0;
|
|
}
|
|
if (info->xmit_buf)
|
|
free_page(page);
|
|
else
|
|
info->xmit_buf = (unsigned char *) page;
|
|
|
|
/*
|
|
* Clear the FIFO buffers and disable them
|
|
* (they will be reenabled in mxser_change_speed())
|
|
*/
|
|
if (info->IsMoxaMustChipFlag)
|
|
outb((UART_FCR_CLEAR_RCVR |
|
|
UART_FCR_CLEAR_XMIT |
|
|
MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
|
|
else
|
|
outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
|
|
info->base + 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->base + UART_LSR) == 0xff) {
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
if (capable(CAP_SYS_ADMIN)) {
|
|
if (info->tty)
|
|
set_bit(TTY_IO_ERROR, &info->tty->flags);
|
|
return 0;
|
|
} else
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* Clear the interrupt registers.
|
|
*/
|
|
(void) inb(info->base + UART_LSR);
|
|
(void) inb(info->base + UART_RX);
|
|
(void) inb(info->base + UART_IIR);
|
|
(void) inb(info->base + UART_MSR);
|
|
|
|
/*
|
|
* Now, initialize the UART
|
|
*/
|
|
outb(UART_LCR_WLEN8, info->base + UART_LCR); /* reset DLAB */
|
|
info->MCR = UART_MCR_DTR | UART_MCR_RTS;
|
|
outb(info->MCR, info->base + UART_MCR);
|
|
|
|
/*
|
|
* Finally, enable interrupts
|
|
*/
|
|
info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
|
|
/* info->IER = UART_IER_RLSI | UART_IER_RDI; */
|
|
|
|
/* following add by Victor Yu. 08-30-2002 */
|
|
if (info->IsMoxaMustChipFlag)
|
|
info->IER |= MOXA_MUST_IER_EGDAI;
|
|
/* above add by Victor Yu. 08-30-2002 */
|
|
outb(info->IER, info->base + UART_IER); /* enable interrupts */
|
|
|
|
/*
|
|
* And clear the interrupt registers again for luck.
|
|
*/
|
|
(void) inb(info->base + UART_LSR);
|
|
(void) inb(info->base + UART_RX);
|
|
(void) inb(info->base + UART_IIR);
|
|
(void) inb(info->base + UART_MSR);
|
|
|
|
if (info->tty)
|
|
clear_bit(TTY_IO_ERROR, &info->tty->flags);
|
|
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
|
|
|
|
/*
|
|
* and set the speed of the serial port
|
|
*/
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
mxser_change_speed(info, NULL);
|
|
|
|
info->flags |= ASYNC_INITIALIZED;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* This routine will shutdown a serial port; interrupts maybe disabled, and
|
|
* DTR is dropped if the hangup on close termio flag is on.
|
|
*/
|
|
static void mxser_shutdown(struct mxser_struct *info)
|
|
{
|
|
unsigned long flags;
|
|
|
|
if (!(info->flags & ASYNC_INITIALIZED))
|
|
return;
|
|
|
|
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->delta_msr_wait);
|
|
|
|
/*
|
|
* Free the IRQ, if necessary
|
|
*/
|
|
if (info->xmit_buf) {
|
|
free_page((unsigned long) info->xmit_buf);
|
|
info->xmit_buf = NULL;
|
|
}
|
|
|
|
info->IER = 0;
|
|
outb(0x00, info->base + UART_IER);
|
|
|
|
if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
|
|
info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
|
|
outb(info->MCR, info->base + UART_MCR);
|
|
|
|
/* clear Rx/Tx FIFO's */
|
|
/* following add by Victor Yu. 08-30-2002 */
|
|
if (info->IsMoxaMustChipFlag)
|
|
outb((UART_FCR_CLEAR_RCVR |
|
|
UART_FCR_CLEAR_XMIT |
|
|
MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
|
|
else
|
|
/* above add by Victor Yu. 08-30-2002 */
|
|
outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
|
|
info->base + UART_FCR);
|
|
|
|
/* read data port to reset things */
|
|
(void) inb(info->base + UART_RX);
|
|
|
|
if (info->tty)
|
|
set_bit(TTY_IO_ERROR, &info->tty->flags);
|
|
|
|
info->flags &= ~ASYNC_INITIALIZED;
|
|
|
|
/* following add by Victor Yu. 09-23-2002 */
|
|
if (info->IsMoxaMustChipFlag)
|
|
SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->base);
|
|
/* above add by Victor Yu. 09-23-2002 */
|
|
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
}
|
|
|
|
/*
|
|
* 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 mxser_struct *info, struct termios *old_termios)
|
|
{
|
|
unsigned cflag, cval, fcr;
|
|
int ret = 0;
|
|
unsigned char status;
|
|
long baud;
|
|
unsigned long flags;
|
|
|
|
if (!info->tty || !info->tty->termios)
|
|
return ret;
|
|
cflag = info->tty->termios->c_cflag;
|
|
if (!(info->base))
|
|
return ret;
|
|
|
|
#ifndef B921600
|
|
#define B921600 (B460800 +1)
|
|
#endif
|
|
if (mxser_set_baud_method[info->port] == 0) {
|
|
baud = tty_get_baud_rate(info->tty);
|
|
mxser_set_baud(info, baud);
|
|
}
|
|
|
|
/* 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->IsMoxaMustChipFlag) {
|
|
fcr = UART_FCR_ENABLE_FIFO;
|
|
fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
|
|
SET_MOXA_MUST_FIFO_VALUE(info);
|
|
} else
|
|
fcr = 0;
|
|
} else {
|
|
fcr = UART_FCR_ENABLE_FIFO;
|
|
/* following add by Victor Yu. 08-30-2002 */
|
|
if (info->IsMoxaMustChipFlag) {
|
|
fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
|
|
SET_MOXA_MUST_FIFO_VALUE(info);
|
|
} else {
|
|
/* above add by Victor Yu. 08-30-2002 */
|
|
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->flags |= ASYNC_CTS_FLOW;
|
|
info->IER |= UART_IER_MSI;
|
|
if ((info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
|
|
info->MCR |= UART_MCR_AFE;
|
|
/* status = mxser_get_msr(info->base, 0, info->port); */
|
|
/*
|
|
save_flags(flags);
|
|
cli();
|
|
status = inb(baseaddr + UART_MSR);
|
|
restore_flags(flags);
|
|
*/
|
|
/* mxser_check_modem_status(info, status); */
|
|
} else {
|
|
/* status = mxser_get_msr(info->base, 0, info->port); */
|
|
/* MX_LOCK(&info->slock); */
|
|
status = inb(info->base + UART_MSR);
|
|
/* MX_UNLOCK(&info->slock); */
|
|
if (info->tty->hw_stopped) {
|
|
if (status & UART_MSR_CTS) {
|
|
info->tty->hw_stopped = 0;
|
|
if ((info->type != PORT_16550A) &&
|
|
(!info->IsMoxaMustChipFlag)) {
|
|
info->IER |= UART_IER_THRI;
|
|
outb(info->IER, info->base + UART_IER);
|
|
}
|
|
set_bit(MXSER_EVENT_TXLOW, &info->event);
|
|
schedule_work(&info->tqueue); }
|
|
} else {
|
|
if (!(status & UART_MSR_CTS)) {
|
|
info->tty->hw_stopped = 1;
|
|
if ((info->type != PORT_16550A) &&
|
|
(!info->IsMoxaMustChipFlag)) {
|
|
info->IER &= ~UART_IER_THRI;
|
|
outb(info->IER, info->base + UART_IER);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
info->flags &= ~ASYNC_CTS_FLOW;
|
|
}
|
|
outb(info->MCR, info->base + UART_MCR);
|
|
if (cflag & CLOCAL) {
|
|
info->flags &= ~ASYNC_CHECK_CD;
|
|
} else {
|
|
info->flags |= ASYNC_CHECK_CD;
|
|
info->IER |= UART_IER_MSI;
|
|
}
|
|
outb(info->IER, info->base + UART_IER);
|
|
|
|
/*
|
|
* Set up parity check flag
|
|
*/
|
|
info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
|
|
if (I_INPCK(info->tty))
|
|
info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
|
|
if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
|
|
info->read_status_mask |= UART_LSR_BI;
|
|
|
|
info->ignore_status_mask = 0;
|
|
|
|
if (I_IGNBRK(info->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(info->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;
|
|
}
|
|
}
|
|
/* following add by Victor Yu. 09-02-2002 */
|
|
if (info->IsMoxaMustChipFlag) {
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
SET_MOXA_MUST_XON1_VALUE(info->base, START_CHAR(info->tty));
|
|
SET_MOXA_MUST_XOFF1_VALUE(info->base, STOP_CHAR(info->tty));
|
|
if (I_IXON(info->tty)) {
|
|
ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
|
|
} else {
|
|
DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
|
|
}
|
|
if (I_IXOFF(info->tty)) {
|
|
ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
|
|
} else {
|
|
DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
|
|
}
|
|
/*
|
|
if ( I_IXANY(info->tty) ) {
|
|
info->MCR |= MOXA_MUST_MCR_XON_ANY;
|
|
ENABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
|
|
} else {
|
|
info->MCR &= ~MOXA_MUST_MCR_XON_ANY;
|
|
DISABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
|
|
}
|
|
*/
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
}
|
|
/* above add by Victor Yu. 09-02-2002 */
|
|
|
|
|
|
outb(fcr, info->base + UART_FCR); /* set fcr */
|
|
outb(cval, info->base + UART_LCR);
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static int mxser_set_baud(struct mxser_struct *info, long newspd)
|
|
{
|
|
int quot = 0;
|
|
unsigned char cval;
|
|
int ret = 0;
|
|
unsigned long flags;
|
|
|
|
if (!info->tty || !info->tty->termios)
|
|
return ret;
|
|
|
|
if (!(info->base))
|
|
return ret;
|
|
|
|
if (newspd > info->MaxCanSetBaudRate)
|
|
return 0;
|
|
|
|
info->realbaud = newspd;
|
|
if (newspd == 134) {
|
|
quot = (2 * info->baud_base / 269);
|
|
} else if (newspd) {
|
|
quot = info->baud_base / newspd;
|
|
if (quot == 0)
|
|
quot = 1;
|
|
} 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) {
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
info->MCR |= UART_MCR_DTR;
|
|
outb(info->MCR, info->base + UART_MCR);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
} else {
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
info->MCR &= ~UART_MCR_DTR;
|
|
outb(info->MCR, info->base + UART_MCR);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
return ret;
|
|
}
|
|
|
|
cval = inb(info->base + UART_LCR);
|
|
|
|
outb(cval | UART_LCR_DLAB, info->base + UART_LCR); /* set DLAB */
|
|
|
|
outb(quot & 0xff, info->base + UART_DLL); /* LS of divisor */
|
|
outb(quot >> 8, info->base + UART_DLM); /* MS of divisor */
|
|
outb(cval, info->base + UART_LCR); /* reset DLAB */
|
|
|
|
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* ------------------------------------------------------------
|
|
* friends of mxser_ioctl()
|
|
* ------------------------------------------------------------
|
|
*/
|
|
static int mxser_get_serial_info(struct mxser_struct *info, struct serial_struct __user *retinfo)
|
|
{
|
|
struct serial_struct tmp;
|
|
|
|
if (!retinfo)
|
|
return -EFAULT;
|
|
memset(&tmp, 0, sizeof(tmp));
|
|
tmp.type = info->type;
|
|
tmp.line = info->port;
|
|
tmp.port = info->base;
|
|
tmp.irq = info->irq;
|
|
tmp.flags = info->flags;
|
|
tmp.baud_base = info->baud_base;
|
|
tmp.close_delay = info->close_delay;
|
|
tmp.closing_wait = info->closing_wait;
|
|
tmp.custom_divisor = info->custom_divisor;
|
|
tmp.hub6 = 0;
|
|
if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static int mxser_set_serial_info(struct mxser_struct *info, struct serial_struct __user *new_info)
|
|
{
|
|
struct serial_struct new_serial;
|
|
unsigned int flags;
|
|
int retval = 0;
|
|
|
|
if (!new_info || !info->base)
|
|
return -EFAULT;
|
|
if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
|
|
return -EFAULT;
|
|
|
|
if ((new_serial.irq != info->irq) ||
|
|
(new_serial.port != info->base) ||
|
|
(new_serial.custom_divisor != info->custom_divisor) ||
|
|
(new_serial.baud_base != info->baud_base))
|
|
return -EPERM;
|
|
|
|
flags = info->flags & ASYNC_SPD_MASK;
|
|
|
|
if (!capable(CAP_SYS_ADMIN)) {
|
|
if ((new_serial.baud_base != info->baud_base) ||
|
|
(new_serial.close_delay != info->close_delay) ||
|
|
((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
|
|
return -EPERM;
|
|
info->flags = ((info->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.....
|
|
*/
|
|
info->flags = ((info->flags & ~ASYNC_FLAGS) |
|
|
(new_serial.flags & ASYNC_FLAGS));
|
|
info->close_delay = new_serial.close_delay * HZ / 100;
|
|
info->closing_wait = new_serial.closing_wait * HZ / 100;
|
|
info->tty->low_latency =
|
|
(info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
|
|
info->tty->low_latency = 0; /* (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; */
|
|
}
|
|
|
|
/* added by casper, 3/17/2000, for mouse */
|
|
info->type = new_serial.type;
|
|
|
|
process_txrx_fifo(info);
|
|
|
|
if (info->flags & ASYNC_INITIALIZED) {
|
|
if (flags != (info->flags & ASYNC_SPD_MASK)) {
|
|
mxser_change_speed(info, NULL);
|
|
}
|
|
} else {
|
|
retval = mxser_startup(info);
|
|
}
|
|
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_struct *info, unsigned int __user *value)
|
|
{
|
|
unsigned char status;
|
|
unsigned int result;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
status = inb(info->base + UART_LSR);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
|
|
return put_user(result, value);
|
|
}
|
|
|
|
/*
|
|
* This routine sends a break character out the serial port.
|
|
*/
|
|
static void mxser_send_break(struct mxser_struct *info, int duration)
|
|
{
|
|
unsigned long flags;
|
|
|
|
if (!info->base)
|
|
return;
|
|
set_current_state(TASK_INTERRUPTIBLE);
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
outb(inb(info->base + UART_LCR) | UART_LCR_SBC,
|
|
info->base + UART_LCR);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
schedule_timeout(duration);
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC,
|
|
info->base + UART_LCR);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
}
|
|
|
|
static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
|
|
{
|
|
struct mxser_struct *info = tty->driver_data;
|
|
unsigned char control, status;
|
|
unsigned long flags;
|
|
|
|
|
|
if (tty->index == MXSER_PORTS)
|
|
return -ENOIOCTLCMD;
|
|
if (tty->flags & (1 << TTY_IO_ERROR))
|
|
return -EIO;
|
|
|
|
control = info->MCR;
|
|
|
|
spin_lock_irqsave(&info->slock, flags);
|
|
status = inb(info->base + UART_MSR);
|
|
if (status & UART_MSR_ANY_DELTA)
|
|
mxser_check_modem_status(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, struct file *file, unsigned int set, unsigned int clear)
|
|
{
|
|
struct mxser_struct *info = tty->driver_data;
|
|
unsigned long flags;
|
|
|
|
|
|
if (tty->index == MXSER_PORTS)
|
|
return -ENOIOCTLCMD;
|
|
if (tty->flags & (1 << TTY_IO_ERROR))
|
|
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->base + UART_MCR);
|
|
spin_unlock_irqrestore(&info->slock, flags);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int mxser_read_register(int, unsigned short *);
|
|
static int mxser_program_mode(int);
|
|
static void mxser_normal_mode(int);
|
|
|
|
static int mxser_get_ISA_conf(int cap, struct mxser_hwconf *hwconf)
|
|
{
|
|
int id, i, bits;
|
|
unsigned short regs[16], irq;
|
|
unsigned char scratch, scratch2;
|
|
|
|
hwconf->IsMoxaMustChipFlag = MOXA_OTHER_UART;
|
|
|
|
id = mxser_read_register(cap, regs);
|
|
if (id == C168_ASIC_ID) {
|
|
hwconf->board_type = MXSER_BOARD_C168_ISA;
|
|
hwconf->ports = 8;
|
|
} else if (id == C104_ASIC_ID) {
|
|
hwconf->board_type = MXSER_BOARD_C104_ISA;
|
|
hwconf->ports = 4;
|
|
} else if (id == C102_ASIC_ID) {
|
|
hwconf->board_type = MXSER_BOARD_C102_ISA;
|
|
hwconf->ports = 2;
|
|
} else if (id == CI132_ASIC_ID) {
|
|
hwconf->board_type = MXSER_BOARD_CI132;
|
|
hwconf->ports = 2;
|
|
} else if (id == CI134_ASIC_ID) {
|
|
hwconf->board_type = MXSER_BOARD_CI134;
|
|
hwconf->ports = 4;
|
|
} else if (id == CI104J_ASIC_ID) {
|
|
hwconf->board_type = MXSER_BOARD_CI104J;
|
|
hwconf->ports = 4;
|
|
} else
|
|
return 0;
|
|
|
|
irq = 0;
|
|
if (hwconf->ports == 2) {
|
|
irq = regs[9] & 0xF000;
|
|
irq = irq | (irq >> 4);
|
|
if (irq != (regs[9] & 0xFF00))
|
|
return MXSER_ERR_IRQ_CONFLIT;
|
|
} else if (hwconf->ports == 4) {
|
|
irq = regs[9] & 0xF000;
|
|
irq = irq | (irq >> 4);
|
|
irq = irq | (irq >> 8);
|
|
if (irq != regs[9])
|
|
return MXSER_ERR_IRQ_CONFLIT;
|
|
} else if (hwconf->ports == 8) {
|
|
irq = regs[9] & 0xF000;
|
|
irq = irq | (irq >> 4);
|
|
irq = irq | (irq >> 8);
|
|
if ((irq != regs[9]) || (irq != regs[10]))
|
|
return MXSER_ERR_IRQ_CONFLIT;
|
|
}
|
|
|
|
if (!irq)
|
|
return MXSER_ERR_IRQ;
|
|
hwconf->irq = ((int)(irq & 0xF000) >> 12);
|
|
for (i = 0; i < 8; i++)
|
|
hwconf->ioaddr[i] = (int) regs[i + 1] & 0xFFF8;
|
|
if ((regs[12] & 0x80) == 0)
|
|
return MXSER_ERR_VECTOR;
|
|
hwconf->vector = (int)regs[11]; /* interrupt vector */
|
|
if (id == 1)
|
|
hwconf->vector_mask = 0x00FF;
|
|
else
|
|
hwconf->vector_mask = 0x000F;
|
|
for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
|
|
if (regs[12] & bits) {
|
|
hwconf->baud_base[i] = 921600;
|
|
hwconf->MaxCanSetBaudRate[i] = 921600; /* add by Victor Yu. 09-04-2002 */
|
|
} else {
|
|
hwconf->baud_base[i] = 115200;
|
|
hwconf->MaxCanSetBaudRate[i] = 115200; /* add by Victor Yu. 09-04-2002 */
|
|
}
|
|
}
|
|
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)
|
|
hwconf->uart_type = PORT_16550A;
|
|
else
|
|
hwconf->uart_type = PORT_16450;
|
|
if (id == 1)
|
|
hwconf->ports = 8;
|
|
else
|
|
hwconf->ports = 4;
|
|
request_region(hwconf->ioaddr[0], 8 * hwconf->ports, "mxser(IO)");
|
|
request_region(hwconf->vector, 1, "mxser(vector)");
|
|
return hwconf->ports;
|
|
}
|
|
|
|
#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 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_program_mode(int port)
|
|
{
|
|
int id, i, j, n;
|
|
/* unsigned long flags; */
|
|
|
|
spin_lock(&gm_lock);
|
|
outb(0, port);
|
|
outb(0, port);
|
|
outb(0, port);
|
|
(void)inb(port);
|
|
(void)inb(port);
|
|
outb(0, port);
|
|
(void)inb(port);
|
|
/* restore_flags(flags); */
|
|
spin_unlock(&gm_lock);
|
|
|
|
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 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);
|
|
}
|
|
|
|
module_init(mxser_module_init);
|
|
module_exit(mxser_module_exit);
|