diff options
| author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
| commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
| tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/char/mxser.c | |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/char/mxser.c')
| -rw-r--r-- | drivers/char/mxser.c | 3170 |
1 files changed, 3170 insertions, 0 deletions
diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c new file mode 100644 index 00000000000..7a245068e3e --- /dev/null +++ b/drivers/char/mxser.c @@ -0,0 +1,3170 @@ +/* + * mxser.c -- MOXA Smartio/Industio family multiport serial driver. + * + * Copyright (C) 1999-2001 Moxa Technologies (support@moxa.com.tw). + * + * This code is loosely based on the Linux serial driver, written by + * Linus Torvalds, Theodore T'so and others. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or +* (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * Original release 10/26/00 + * + * 02/06/01 Support MOXA Industio family boards. + * 02/06/01 Support TIOCGICOUNT. + * 02/06/01 Fix the problem for connecting to serial mouse. + * 02/06/01 Fix the problem for H/W flow control. + * 02/06/01 Fix the compling warning when CONFIG_PCI + * don't be defined. + * + * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox + * <alan@redhat.com>. The original 1.8 code is available on www.moxa.com. + * - Fixed x86_64 cleanness + * - Fixed sleep with spinlock held in mxser_send_break + */ + + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/version.h> +#include <linux/autoconf.h> +#include <linux/errno.h> +#include <linux/signal.h> +#include <linux/sched.h> +#include <linux/timer.h> +#include <linux/interrupt.h> +#include <linux/tty.h> +#include <linux/tty_flip.h> +#include <linux/serial.h> +#include <linux/serial_reg.h> +#include <linux/major.h> +#include <linux/string.h> +#include <linux/fcntl.h> +#include <linux/ptrace.h> +#include <linux/gfp.h> +#include <linux/ioport.h> +#include <linux/mm.h> +#include <linux/smp_lock.h> +#include <linux/delay.h> +#include <linux/pci.h> + +#include <asm/system.h> +#include <asm/io.h> +#include <asm/irq.h> +#include <asm/segment.h> +#include <asm/bitops.h> +#include <asm/uaccess.h> + +#include "mxser.h" + +#define MXSER_VERSION "1.8" +#define MXSERMAJOR 174 +#define MXSERCUMAJOR 175 + +#define MXSER_EVENT_TXLOW 1 +#define MXSER_EVENT_HANGUP 2 + +#define MXSER_BOARDS 4 /* Max. boards */ +#define MXSER_PORTS 32 /* Max. ports */ +#define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */ +#define MXSER_ISR_PASS_LIMIT 256 + +#define MXSER_ERR_IOADDR -1 +#define MXSER_ERR_IRQ -2 +#define MXSER_ERR_IRQ_CONFLIT -3 +#define MXSER_ERR_VECTOR -4 + +#define SERIAL_TYPE_NORMAL 1 +#define SERIAL_TYPE_CALLOUT 2 + +#define WAKEUP_CHARS 256 + +#define UART_MCR_AFE 0x20 +#define UART_LSR_SPECIAL 0x1E + +#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|IXON|IXOFF)) + +#define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? SA_SHIRQ : SA_INTERRUPT) + +#define C168_ASIC_ID 1 +#define C104_ASIC_ID 2 +#define C102_ASIC_ID 0xB +#define CI132_ASIC_ID 4 +#define CI134_ASIC_ID 3 +#define CI104J_ASIC_ID 5 + +enum { + MXSER_BOARD_C168_ISA = 1, + MXSER_BOARD_C104_ISA, + MXSER_BOARD_CI104J, + MXSER_BOARD_C168_PCI, + MXSER_BOARD_C104_PCI, + MXSER_BOARD_C102_ISA, + MXSER_BOARD_CI132, + MXSER_BOARD_CI134, + MXSER_BOARD_CP132, + MXSER_BOARD_CP114, + MXSER_BOARD_CT114, + MXSER_BOARD_CP102, + MXSER_BOARD_CP104U, + MXSER_BOARD_CP168U, + MXSER_BOARD_CP132U, + MXSER_BOARD_CP134U, + MXSER_BOARD_CP104JU, + MXSER_BOARD_RC7000, + MXSER_BOARD_CP118U, + MXSER_BOARD_CP102UL, + MXSER_BOARD_CP102U, +}; + +static char *mxser_brdname[] = { + "C168 series", + "C104 series", + "CI-104J series", + "C168H/PCI series", + "C104H/PCI series", + "C102 series", + "CI-132 series", + "CI-134 series", + "CP-132 series", + "CP-114 series", + "CT-114 series", + "CP-102 series", + "CP-104U series", + "CP-168U series", + "CP-132U series", + "CP-134U series", + "CP-104JU series", + "Moxa UC7000 Serial", + "CP-118U series", + "CP-102UL series", + "CP-102U series", +}; + +static int mxser_numports[] = { + 8, // C168-ISA + 4, // C104-ISA + 4, // CI104J + 8, // C168-PCI + 4, // C104-PCI + 2, // C102-ISA + 2, // CI132 + 4, // CI134 + 2, // CP132 + 4, // CP114 + 4, // CT114 + 2, // CP102 + 4, // CP104U + 8, // CP168U + 2, // CP132U + 4, // CP134U + 4, // CP104JU + 8, // RC7000 + 8, // CP118U + 2, // CP102UL + 2, // CP102U +}; + +#define UART_TYPE_NUM 2 + +static const unsigned int Gmoxa_uart_id[UART_TYPE_NUM] = { + MOXA_MUST_MU150_HWID, + MOXA_MUST_MU860_HWID +}; + +// This is only for PCI +#define UART_INFO_NUM 3 +struct mxpciuart_info { + int type; + int tx_fifo; + int rx_fifo; + int xmit_fifo_size; + int rx_high_water; + int rx_trigger; + int rx_low_water; + long max_baud; +}; + +static const struct mxpciuart_info Gpci_uart_info[UART_INFO_NUM] = { + {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L}, + {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L}, + {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L} +}; + + +#ifdef CONFIG_PCI + +static struct pci_device_id mxser_pcibrds[] = { + {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C168_PCI}, + {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C104_PCI}, + {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132}, + {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP114}, + {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CT114}, + {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102}, + {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104U}, + {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP168U}, + {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132U}, + {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP134U}, + {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104JU}, + {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_RC7000}, + {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP118U}, + {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102UL}, + {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102U}, + {0} +}; + +MODULE_DEVICE_TABLE(pci, mxser_pcibrds); + + +#endif + +typedef struct _moxa_pci_info { + unsigned short busNum; + unsigned short devNum; + struct pci_dev *pdev; // add by Victor Yu. 06-23-2003 +} moxa_pci_info; + +static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 }; +static int ttymajor = MXSERMAJOR; +static int calloutmajor = MXSERCUMAJOR; +static int verbose = 0; + +/* Variables for insmod */ + +MODULE_AUTHOR("Casper Yang"); +MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver"); +MODULE_PARM(ioaddr, "1-4i"); +MODULE_PARM(ttymajor, "i"); +MODULE_PARM(calloutmajor, "i"); +MODULE_PARM(verbose, "i"); +MODULE_LICENSE("GPL"); + +struct mxser_log { + int tick; + unsigned long rxcnt[MXSER_PORTS]; + unsigned long txcnt[MXSER_PORTS]; +}; + + +struct mxser_mon { + unsigned long rxcnt; + unsigned long txcnt; + unsigned long up_rxcnt; + unsigned long up_txcnt; + int modem_status; + unsigned char hold_reason; +}; + +struct mxser_mon_ext { + unsigned long rx_cnt[32]; + unsigned long tx_cnt[32]; + unsigned long up_rxcnt[32]; + unsigned long up_txcnt[32]; + int modem_status[32]; + + long baudrate[32]; + int databits[32]; + int stopbits[32]; + int parity[32]; + int flowctrl[32]; + int fifo[32]; + int iftype[32]; +}; +struct mxser_hwconf { + int board_type; + int ports; + int irq; + int vector; + int vector_mask; + int uart_type; + int ioaddr[MXSER_PORTS_PER_BOARD]; + int baud_base[MXSER_PORTS_PER_BOARD]; + moxa_pci_info pciInfo; + int IsMoxaMustChipFlag; // add by Victor Yu. 08-30-2002 + int MaxCanSetBaudRate[MXSER_PORTS_PER_BOARD]; // add by Victor Yu. 09-04-2002 + int opmode_ioaddr[MXSER_PORTS_PER_BOARD]; // add by Victor Yu. 01-05-2004 +}; + +struct mxser_struct { + int port; + int base; /* port base address */ + int irq; /* port using irq no. */ + int vector; /* port irq vector */ + int vectormask; /* port vector mask */ + int rx_high_water; + int rx_trigger; /* Rx fifo trigger level */ + int rx_low_water; + int baud_base; /* max. speed */ + int flags; /* defined in tty.h */ + int type; /* UART type */ + struct tty_struct *tty; + int read_status_mask; + int ignore_status_mask; + int xmit_fifo_size; + int custom_divisor; + int x_char; /* xon/xoff character */ + int close_delay; + unsigned short closing_wait; + int IER; /* Interrupt Enable Register */ + int MCR; /* Modem control register */ + unsigned long event; + int count; /* # of fd on device */ + int blocked_open; /* # of blocked opens */ + long session; /* Session of opening process */ + long pgrp; /* pgrp of opening process */ + unsigned char *xmit_buf; + int xmit_head; + int xmit_tail; + int xmit_cnt; + struct work_struct tqueue; + struct termios normal_termios; + struct termios callout_termios; + wait_queue_head_t open_wait; + wait_queue_head_t close_wait; + wait_queue_head_t delta_msr_wait; + struct async_icount icount; /* kernel counters for the 4 input interrupts */ + int timeout; + int IsMoxaMustChipFlag; // add by Victor Yu. 08-30-2002 + int MaxCanSetBaudRate; // add by Victor Yu. 09-04-2002 + int opmode_ioaddr; // add by Victor Yu. 01-05-2004 + unsigned char stop_rx; + unsigned char ldisc_stop_rx; + long realbaud; + struct mxser_mon mon_data; + unsigned char err_shadow; + spinlock_t slock; +}; + + +struct mxser_mstatus { + tcflag_t cflag; + int cts; + int dsr; + int ri; + int dcd; +}; + +static struct mxser_mstatus GMStatus[MXSER_PORTS]; + +static int mxserBoardCAP[MXSER_BOARDS] = { + 0, 0, 0, 0 + /* 0x180, 0x280, 0x200, 0x320 */ +}; + +static struct tty_driver *mxvar_sdriver; +static struct mxser_struct mxvar_table[MXSER_PORTS]; +static struct tty_struct *mxvar_tty[MXSER_PORTS + 1]; +static struct termios *mxvar_termios[MXSER_PORTS + 1]; +static struct termios *mxvar_termios_locked[MXSER_PORTS + 1]; +static struct mxser_log mxvar_log; +static int mxvar_diagflag; +static unsigned char mxser_msr[MXSER_PORTS + 1]; +static struct mxser_mon_ext mon_data_ext; +static int mxser_set_baud_method[MXSER_PORTS + 1]; +static spinlock_t gm_lock; + +/* + * This is used to figure out the divisor speeds and the timeouts + */ + +static struct mxser_hwconf mxsercfg[MXSER_BOARDS]; + +/* + * static functions: + */ + +static void mxser_getcfg(int board, struct mxser_hwconf *hwconf); +static int mxser_init(void); + +//static void mxser_poll(unsigned long); +static int mxser_get_ISA_conf(int, struct mxser_hwconf *); +static int mxser_get_PCI_conf(int, int, int, struct mxser_hwconf *); +static void mxser_do_softint(void *); +static int mxser_open(struct tty_struct *, struct file *); +static void mxser_close(struct tty_struct *, struct file *); +static int mxser_write(struct tty_struct *, const unsigned char *, int); +static int mxser_write_room(struct tty_struct *); +static void mxser_flush_buffer(struct tty_struct *); +static int mxser_chars_in_buffer(struct tty_struct *); +static void mxser_flush_chars(struct tty_struct *); +static void mxser_put_char(struct tty_struct *, unsigned char); +static int mxser_ioctl(struct tty_struct *, struct file *, uint, ulong); +static int mxser_ioctl_special(unsigned int, void __user *); +static void mxser_throttle(struct tty_struct *); +static void mxser_unthrottle(struct tty_struct *); +static void mxser_set_termios(struct tty_struct *, struct termios *); +static void mxser_stop(struct tty_struct *); +static void mxser_start(struct tty_struct *); +static void mxser_hangup(struct tty_struct *); +static void mxser_rs_break(struct tty_struct *, int); +static irqreturn_t mxser_interrupt(int, void *, struct pt_regs *); +static void mxser_receive_chars(struct mxser_struct *, int *); +static void mxser_transmit_chars(struct mxser_struct *); +static void mxser_check_modem_status(struct mxser_struct *, int); +static int mxser_block_til_ready(struct tty_struct *, struct file *, struct mxser_struct *); +static int mxser_startup(struct mxser_struct *); +static void mxser_shutdown(struct mxser_struct *); +static int mxser_change_speed(struct mxser_struct *, struct termios *old_termios); +static int mxser_get_serial_info(struct mxser_struct *, struct serial_struct __user *); +static int mxser_set_serial_info(struct mxser_struct *, struct serial_struct __user *); +static int mxser_get_lsr_info(struct mxser_struct *, unsigned int __user *); +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 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, + .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 = 0; + + if (verbose) + printk(KERN_DEBUG "Unloading module mxser ...\n"); + + if ((err |= tty_unregister_driver(mxvar_sdriver))) + 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 fail,IRQ (%d) may be conflit 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; + int ret1; + 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_sdriver->open = mxser_open; + mxvar_sdriver->close = mxser_close; + mxvar_sdriver->write = mxser_write; + mxvar_sdriver->put_char = mxser_put_char; + mxvar_sdriver->flush_chars = mxser_flush_chars; + mxvar_sdriver->write_room = mxser_write_room; + mxvar_sdriver->chars_in_buffer = mxser_chars_in_buffer; + mxvar_sdriver->flush_buffer = mxser_flush_buffer; + mxvar_sdriver->ioctl = mxser_ioctl; + mxvar_sdriver->throttle = mxser_throttle; + mxvar_sdriver->unthrottle = mxser_unthrottle; + mxvar_sdriver->set_termios = mxser_set_termios; + mxvar_sdriver->stop = mxser_stop; + mxvar_sdriver->start = mxser_start; + mxvar_sdriver->hangup = mxser_hangup; + mxvar_sdriver->break_ctl = mxser_rs_break; + mxvar_sdriver->wait_until_sent = mxser_wait_until_sent; + + 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 = (sizeof(mxser_pcibrds) / sizeof(mxser_pcibrds[0])) - 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 + + ret1 = 0; + if (!(ret1 = tty_register_driver(mxvar_sdriver))) { + return 0; + } else + printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family driver !\n"); + + + if (ret1) { + 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 -1; + } + + return (0); +} + +static void mxser_do_softint(void *private_) +{ + struct mxser_struct *info = (struct mxser_struct *) 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; + + 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); + clear_bit(TTY_DONT_FLIP, &tty->flags); + + //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 = (struct mxser_struct *) tty->driver_data; + + unsigned long timeout; + unsigned long flags; + struct tty_ldisc *ld; + + if (tty->index == MXSER_PORTS) + return; + if (!info) + BUG(); + + 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)) { + set_current_state(TASK_INTERRUPTIBLE); + schedule_timeout(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) { + set_current_state(TASK_INTERRUPTIBLE); + schedule_timeout(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 = (struct mxser_struct *) tty->driver_data; + unsigned long flags; + + if (!tty || !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 = (struct mxser_struct *) tty->driver_data; + unsigned long flags; + + if (!tty || !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 = (struct mxser_struct *) 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 = (struct mxser_struct *) 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 = (struct mxser_struct *) tty->driver_data; + return info->xmit_cnt; +} + +static void mxser_flush_buffer(struct tty_struct *tty) +{ + struct mxser_struct *info = (struct mxser_struct *) 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 = (struct mxser_struct *) 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 = (struct mxser_struct *) 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); + // outb(info->IER, 0); // mask by Victor Yu. 09-02-2002 + outb(0, info->base + UART_IER); + info->IER |= UART_IER_THRI; + outb(info->IER, info->base + UART_IER); /* force Tx interrupt */ + } // 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 = (struct mxser_struct *) 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); + // outb(info->IER, 0); // mask by Victor Yu. 09-02-2002 + outb(0, info->base + UART_IER); // add by Victor Yu. 09-02-2002 + 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); + } +} + +/* + * 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 = (struct mxser_struct *)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 = (struct mxser_struct *)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 = (struct mxser_struct *) 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 = (struct mxser_struct *) 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 = (struct mxser_struct *) 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 = (struct mxser_struct *) 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 + set_current_state(TASK_INTERRUPTIBLE); + schedule_timeout(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 = (struct mxser_struct *) 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 = (struct mxser_struct *) 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; + unsigned char *cp; + char *fp; + int count; + int recv_room; + int max = 256; + unsigned long flags; + + spin_lock_irqsave(&info->slock, flags); + + recv_room = tty->ldisc.receive_room(tty); + if ((recv_room == 0) && (!info->ldisc_stop_rx)) { + //mxser_throttle(tty); + mxser_stoprx(tty); + //return; + } + + cp = tty->flip.char_buf; + fp = tty->flip.flag_buf; + count = 0; + + // 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); + + if (info->IsMoxaMustChipFlag == MOXA_MUST_MU150_HWID) // add by Victor Yu. 02-11-2004 + 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); + count++; + *cp++ = ch; + *fp++ = 0; + cnt++; + /* + if((count>=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((count>=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 { + count++; + if (*status & UART_LSR_SPECIAL) { + if (*status & UART_LSR_BI) { + *fp++ = 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) { + *fp++ = TTY_PARITY; +/* added by casper 1/11/2000 */ + info->icount.parity++; +/* */ + } else if (*status & UART_LSR_FE) { + *fp++ = TTY_FRAME; +/* added by casper 1/11/2000 */ + info->icount.frame++; +/* */ + } else if (*status & UART_LSR_OE) { + *fp++ = TTY_OVERRUN; +/* added by casper 1/11/2000 */ + info->icount.overrun++; +/* */ + } else + *fp++ = 0; + } else + *fp++ = 0; + *cp++ = ch; + 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) { + switch (cflag & (CBAUD | CBAUDEX)) { + case B921600: + baud = 921600; + break; + case B460800: + baud = 460800; + break; + case B230400: + baud = 230400; + break; + case B115200: + baud = 115200; + break; + case B57600: + baud = 57600; + break; + case B38400: + baud = 38400; + break; + case B19200: + baud = 19200; + break; + case B9600: + baud = 9600; + break; + case B4800: + baud = 4800; + break; + case B2400: + baud = 2400; + break; + case B1800: + baud = 1800; + break; + case B1200: + baud = 1200; + break; + case B600: + baud = 600; + break; + case B300: + baud = 300; + break; + case B200: + baud = 200; + break; + case B150: + baud = 150; + break; + case B134: + baud = 134; + break; + case B110: + baud = 110; + break; + case B75: + baud = 75; + break; + case B50: + baud = 50; + break; + default: + baud = 0; + break; + } + 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 = (struct mxser_struct *) 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 = (struct mxser_struct *) 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); |