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WSL2-Linux-Kernel/drivers/char/mxser.c

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/*
* mxser.c -- MOXA Smartio/Industio family multiport serial driver.
*
* Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com).
* Copyright (C) 2006-2008 Jiri Slaby <jirislaby@gmail.com>
*
* This code is loosely based on the 1.8 moxa driver which is based on
* 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.
*
* 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/module.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/delay.h>
#include <linux/pci.h>
#include <linux/bitops.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/uaccess.h>
#include "mxser.h"
#define MXSER_VERSION "2.0.3" /* 1.11 */
#define MXSERMAJOR 174
#define MXSERCUMAJOR 175
#define MXSER_BOARDS 4 /* Max. boards */
#define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
#define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
#define MXSER_ISR_PASS_LIMIT 100
#define MXSER_ERR_IOADDR -1
#define MXSER_ERR_IRQ -2
#define MXSER_ERR_IRQ_CONFLIT -3
#define MXSER_ERR_VECTOR -4
/*CheckIsMoxaMust return value*/
#define MOXA_OTHER_UART 0x00
#define MOXA_MUST_MU150_HWID 0x01
#define MOXA_MUST_MU860_HWID 0x02
#define WAKEUP_CHARS 256
#define UART_MCR_AFE 0x20
#define UART_LSR_SPECIAL 0x1E
#define PCI_DEVICE_ID_CB108 0x1080
#define PCI_DEVICE_ID_CB114 0x1142
#define PCI_DEVICE_ID_CP114UL 0x1143
#define PCI_DEVICE_ID_CB134I 0x1341
#define PCI_DEVICE_ID_CP138U 0x1380
#define PCI_DEVICE_ID_POS104UL 0x1044
#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
#define MXSER_HIGHBAUD 1
#define MXSER_HAS2 2
/* This is only for PCI */
static const struct {
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;
} Gpci_uart_info[] = {
{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}
};
#define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
struct mxser_cardinfo {
char *name;
unsigned int nports;
unsigned int flags;
};
static const struct mxser_cardinfo mxser_cards[] = {
/* 0*/ { "C168 series", 8, },
{ "C104 series", 4, },
{ "CI-104J series", 4, },
{ "C168H/PCI series", 8, },
{ "C104H/PCI series", 4, },
/* 5*/ { "C102 series", 4, MXSER_HAS2 }, /* C102-ISA */
{ "CI-132 series", 4, MXSER_HAS2 },
{ "CI-134 series", 4, },
{ "CP-132 series", 2, },
{ "CP-114 series", 4, },
/*10*/ { "CT-114 series", 4, },
{ "CP-102 series", 2, MXSER_HIGHBAUD },
{ "CP-104U series", 4, },
{ "CP-168U series", 8, },
{ "CP-132U series", 2, },
/*15*/ { "CP-134U series", 4, },
{ "CP-104JU series", 4, },
{ "Moxa UC7000 Serial", 8, }, /* RC7000 */
{ "CP-118U series", 8, },
{ "CP-102UL series", 2, },
/*20*/ { "CP-102U series", 2, },
{ "CP-118EL series", 8, },
{ "CP-168EL series", 8, },
{ "CP-104EL series", 4, },
{ "CB-108 series", 8, },
/*25*/ { "CB-114 series", 4, },
{ "CB-134I series", 4, },
{ "CP-138U series", 8, },
{ "POS-104UL series", 4, },
{ "CP-114UL series", 4, }
};
/* driver_data correspond to the lines in the structure above
see also ISA probe function before you change something */
static struct pci_device_id mxser_pcibrds[] = {
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108), .driver_data = 24 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114), .driver_data = 25 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I), .driver_data = 26 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U), .driver_data = 27 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL), .driver_data = 28 },
{ PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 },
{ }
};
MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
static int ttymajor = MXSERMAJOR;
/* Variables for insmod */
MODULE_AUTHOR("Casper Yang");
MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
module_param_array(ioaddr, int, NULL, 0);
module_param(ttymajor, int, 0);
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_board;
struct mxser_port {
struct mxser_board *board;
struct tty_struct *tty;
unsigned long ioaddr;
unsigned long opmode_ioaddr;
int max_baud;
int rx_high_water;
int rx_trigger; /* Rx fifo trigger level */
int rx_low_water;
int baud_base; /* max. speed */
int type; /* UART type */
int flags; /* defined in tty.h */
int x_char; /* xon/xoff character */
int IER; /* Interrupt Enable Register */
int MCR; /* Modem control register */
unsigned char stop_rx;
unsigned char ldisc_stop_rx;
int custom_divisor;
int close_delay;
unsigned short closing_wait;
unsigned char err_shadow;
unsigned long event;
int count; /* # of fd on device */
int blocked_open; /* # of blocked opens */
struct async_icount icount; /* kernel counters for 4 input interrupts */
int timeout;
int read_status_mask;
int ignore_status_mask;
int xmit_fifo_size;
unsigned char *xmit_buf;
int xmit_head;
int xmit_tail;
int xmit_cnt;
struct ktermios normal_termios;
struct mxser_mon mon_data;
spinlock_t slock;
wait_queue_head_t open_wait;
wait_queue_head_t delta_msr_wait;
};
struct mxser_board {
unsigned int idx;
int irq;
const struct mxser_cardinfo *info;
unsigned long vector;
unsigned long vector_mask;
int chip_flag;
int uart_type;
struct mxser_port ports[MXSER_PORTS_PER_BOARD];
};
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 mxser_board mxser_boards[MXSER_BOARDS];
static struct tty_driver *mxvar_sdriver;
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 void mxser_enable_must_enchance_mode(unsigned long baseio)
{
u8 oldlcr;
u8 efr;
oldlcr = inb(baseio + UART_LCR);
outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
efr |= MOXA_MUST_EFR_EFRB_ENABLE;
outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
outb(oldlcr, baseio + UART_LCR);
}
static void mxser_disable_must_enchance_mode(unsigned long baseio)
{
u8 oldlcr;
u8 efr;
oldlcr = inb(baseio + UART_LCR);
outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
efr &= ~MOXA_MUST_EFR_EFRB_ENABLE;
outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
outb(oldlcr, baseio + UART_LCR);
}
static void mxser_set_must_xon1_value(unsigned long baseio, u8 value)
{
u8 oldlcr;
u8 efr;
oldlcr = inb(baseio + UART_LCR);
outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
efr &= ~MOXA_MUST_EFR_BANK_MASK;
efr |= MOXA_MUST_EFR_BANK0;
outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
outb(value, baseio + MOXA_MUST_XON1_REGISTER);
outb(oldlcr, baseio + UART_LCR);
}
static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value)
{
u8 oldlcr;
u8 efr;
oldlcr = inb(baseio + UART_LCR);
outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
efr &= ~MOXA_MUST_EFR_BANK_MASK;
efr |= MOXA_MUST_EFR_BANK0;
outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
outb(value, baseio + MOXA_MUST_XOFF1_REGISTER);
outb(oldlcr, baseio + UART_LCR);
}
static void mxser_set_must_fifo_value(struct mxser_port *info)
{
u8 oldlcr;
u8 efr;
oldlcr = inb(info->ioaddr + UART_LCR);
outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR);
efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER);
efr &= ~MOXA_MUST_EFR_BANK_MASK;
efr |= MOXA_MUST_EFR_BANK1;
outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER);
outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER);
outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER);
outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER);
outb(oldlcr, info->ioaddr + UART_LCR);
}
static void mxser_set_must_enum_value(unsigned long baseio, u8 value)
{
u8 oldlcr;
u8 efr;
oldlcr = inb(baseio + UART_LCR);
outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
efr &= ~MOXA_MUST_EFR_BANK_MASK;
efr |= MOXA_MUST_EFR_BANK2;
outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
outb(value, baseio + MOXA_MUST_ENUM_REGISTER);
outb(oldlcr, baseio + UART_LCR);
}
static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId)
{
u8 oldlcr;
u8 efr;
oldlcr = inb(baseio + UART_LCR);
outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
efr &= ~MOXA_MUST_EFR_BANK_MASK;
efr |= MOXA_MUST_EFR_BANK2;
outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
*pId = inb(baseio + MOXA_MUST_HWID_REGISTER);
outb(oldlcr, baseio + UART_LCR);
}
static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio)
{
u8 oldlcr;
u8 efr;
oldlcr = inb(baseio + UART_LCR);
outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
efr &= ~MOXA_MUST_EFR_SF_MASK;
outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
outb(oldlcr, baseio + UART_LCR);
}
static void mxser_enable_must_tx_software_flow_control(unsigned long baseio)
{
u8 oldlcr;
u8 efr;
oldlcr = inb(baseio + UART_LCR);
outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
efr |= MOXA_MUST_EFR_SF_TX1;
outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
outb(oldlcr, baseio + UART_LCR);
}
static void mxser_disable_must_tx_software_flow_control(unsigned long baseio)
{
u8 oldlcr;
u8 efr;
oldlcr = inb(baseio + UART_LCR);
outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
outb(oldlcr, baseio + UART_LCR);
}
static void mxser_enable_must_rx_software_flow_control(unsigned long baseio)
{
u8 oldlcr;
u8 efr;
oldlcr = inb(baseio + UART_LCR);
outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
efr |= MOXA_MUST_EFR_SF_RX1;
outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
outb(oldlcr, baseio + UART_LCR);
}
static void mxser_disable_must_rx_software_flow_control(unsigned long baseio)
{
u8 oldlcr;
u8 efr;
oldlcr = inb(baseio + UART_LCR);
outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
outb(oldlcr, baseio + UART_LCR);
}
#ifdef CONFIG_PCI
static int __devinit CheckIsMoxaMust(unsigned long io)
{
u8 oldmcr, hwid;
int i;
outb(0, io + UART_LCR);
mxser_disable_must_enchance_mode(io);
oldmcr = inb(io + UART_MCR);
outb(0, io + UART_MCR);
mxser_set_must_xon1_value(io, 0x11);
if ((hwid = inb(io + UART_MCR)) != 0) {
outb(oldmcr, io + UART_MCR);
return MOXA_OTHER_UART;
}
mxser_get_must_hardware_id(io, &hwid);
for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
if (hwid == Gpci_uart_info[i].type)
return (int)hwid;
}
return MOXA_OTHER_UART;
}
#endif
static void process_txrx_fifo(struct mxser_port *info)
{
int i;
if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
info->rx_trigger = 1;
info->rx_high_water = 1;
info->rx_low_water = 1;
info->xmit_fifo_size = 1;
} else
for (i = 0; i < UART_INFO_NUM; i++)
if (info->board->chip_flag == Gpci_uart_info[i].type) {
info->rx_trigger = Gpci_uart_info[i].rx_trigger;
info->rx_low_water = Gpci_uart_info[i].rx_low_water;
info->rx_high_water = Gpci_uart_info[i].rx_high_water;
info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
break;
}
}
static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
{
unsigned char status = 0;
status = inb(baseaddr + UART_MSR);
mxser_msr[port] &= 0x0F;
mxser_msr[port] |= status;
status = mxser_msr[port];
if (mode)
mxser_msr[port] = 0;
return status;
}
static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
struct mxser_port *port)
{
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) ||
test_bit(TTY_IO_ERROR, &tty->flags)) {
port->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, port->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(&port->open_wait, &wait);
spin_lock_irqsave(&port->slock, flags);
if (!tty_hung_up_p(filp))
port->count--;
spin_unlock_irqrestore(&port->slock, flags);
port->blocked_open++;
while (1) {
spin_lock_irqsave(&port->slock, flags);
outb(inb(port->ioaddr + UART_MCR) |
UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
spin_unlock_irqrestore(&port->slock, flags);
set_current_state(TASK_INTERRUPTIBLE);
if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
if (port->flags & ASYNC_HUP_NOTIFY)
retval = -EAGAIN;
else
retval = -ERESTARTSYS;
break;
}
if (!(port->flags & ASYNC_CLOSING) &&
(do_clocal ||
(inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
break;
if (signal_pending(current)) {
retval = -ERESTARTSYS;
break;
}
schedule();
}
set_current_state(TASK_RUNNING);
remove_wait_queue(&port->open_wait, &wait);
if (!tty_hung_up_p(filp))
port->count++;
port->blocked_open--;
if (retval)
return retval;
port->flags |= ASYNC_NORMAL_ACTIVE;
return 0;
}
static int mxser_set_baud(struct mxser_port *info, long newspd)
{
int quot = 0, baud;
unsigned char cval;
if (!info->tty || !info->tty->termios)
return -1;
if (!(info->ioaddr))
return -1;
if (newspd > info->max_baud)
return -1;
if (newspd == 134) {
quot = 2 * info->baud_base / 269;
tty_encode_baud_rate(info->tty, 134, 134);
} else if (newspd) {
quot = info->baud_base / newspd;
if (quot == 0)
quot = 1;
baud = info->baud_base/quot;
tty_encode_baud_rate(info->tty, baud, baud);
} else {
quot = 0;
}
info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
info->timeout += HZ / 50; /* Add .02 seconds of slop */
if (quot) {
info->MCR |= UART_MCR_DTR;
outb(info->MCR, info->ioaddr + UART_MCR);
} else {
info->MCR &= ~UART_MCR_DTR;
outb(info->MCR, info->ioaddr + UART_MCR);
return 0;
}
cval = inb(info->ioaddr + UART_LCR);
outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
#ifdef BOTHER
if (C_BAUD(info->tty) == BOTHER) {
quot = info->baud_base % newspd;
quot *= 8;
if (quot % newspd > newspd / 2) {
quot /= newspd;
quot++;
} else
quot /= newspd;
mxser_set_must_enum_value(info->ioaddr, quot);
} else
#endif
mxser_set_must_enum_value(info->ioaddr, 0);
return 0;
}
/*
* This routine is called to set the UART divisor registers to match
* the specified baud rate for a serial port.
*/
static int mxser_change_speed(struct mxser_port *info,
struct ktermios *old_termios)
{
unsigned cflag, cval, fcr;
int ret = 0;
unsigned char status;
if (!info->tty || !info->tty->termios)
return ret;
cflag = info->tty->termios->c_cflag;
if (!(info->ioaddr))
return ret;
if (mxser_set_baud_method[info->tty->index] == 0)
mxser_set_baud(info, tty_get_baud_rate(info->tty));
/* byte size and parity */
switch (cflag & CSIZE) {
case CS5:
cval = 0x00;
break;
case CS6:
cval = 0x01;
break;
case CS7:
cval = 0x02;
break;
case CS8:
cval = 0x03;
break;
default:
cval = 0x00;
break; /* too keep GCC shut... */
}
if (cflag & CSTOPB)
cval |= 0x04;
if (cflag & PARENB)
cval |= UART_LCR_PARITY;
if (!(cflag & PARODD))
cval |= UART_LCR_EPAR;
if (cflag & CMSPAR)
cval |= UART_LCR_SPAR;
if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
if (info->board->chip_flag) {
fcr = UART_FCR_ENABLE_FIFO;
fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
mxser_set_must_fifo_value(info);
} else
fcr = 0;
} else {
fcr = UART_FCR_ENABLE_FIFO;
if (info->board->chip_flag) {
fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
mxser_set_must_fifo_value(info);
} else {
switch (info->rx_trigger) {
case 1:
fcr |= UART_FCR_TRIGGER_1;
break;
case 4:
fcr |= UART_FCR_TRIGGER_4;
break;
case 8:
fcr |= UART_FCR_TRIGGER_8;
break;
default:
fcr |= UART_FCR_TRIGGER_14;
break;
}
}
}
/* CTS flow control flag and modem status interrupts */
info->IER &= ~UART_IER_MSI;
info->MCR &= ~UART_MCR_AFE;
if (cflag & CRTSCTS) {
info->flags |= ASYNC_CTS_FLOW;
info->IER |= UART_IER_MSI;
if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
info->MCR |= UART_MCR_AFE;
} else {
status = inb(info->ioaddr + UART_MSR);
if (info->tty->hw_stopped) {
if (status & UART_MSR_CTS) {
info->tty->hw_stopped = 0;
if (info->type != PORT_16550A &&
!info->board->chip_flag) {
outb(info->IER & ~UART_IER_THRI,
info->ioaddr +
UART_IER);
info->IER |= UART_IER_THRI;
outb(info->IER, info->ioaddr +
UART_IER);
}
tty_wakeup(info->tty);
}
} else {
if (!(status & UART_MSR_CTS)) {
info->tty->hw_stopped = 1;
if ((info->type != PORT_16550A) &&
(!info->board->chip_flag)) {
info->IER &= ~UART_IER_THRI;
outb(info->IER, info->ioaddr +
UART_IER);
}
}
}
}
} else {
info->flags &= ~ASYNC_CTS_FLOW;
}
outb(info->MCR, info->ioaddr + 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->ioaddr + 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;
}
}
if (info->board->chip_flag) {
mxser_set_must_xon1_value(info->ioaddr, START_CHAR(info->tty));
mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(info->tty));
if (I_IXON(info->tty)) {
mxser_enable_must_rx_software_flow_control(
info->ioaddr);
} else {
mxser_disable_must_rx_software_flow_control(
info->ioaddr);
}
if (I_IXOFF(info->tty)) {
mxser_enable_must_tx_software_flow_control(
info->ioaddr);
} else {
mxser_disable_must_tx_software_flow_control(
info->ioaddr);
}
}
outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
outb(cval, info->ioaddr + UART_LCR);
return ret;
}
static void mxser_check_modem_status(struct mxser_port *port, int status)
{
/* update input line counters */
if (status & UART_MSR_TERI)
port->icount.rng++;
if (status & UART_MSR_DDSR)
port->icount.dsr++;
if (status & UART_MSR_DDCD)
port->icount.dcd++;
if (status & UART_MSR_DCTS)
port->icount.cts++;
port->mon_data.modem_status = status;
wake_up_interruptible(&port->delta_msr_wait);
if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
if (status & UART_MSR_DCD)
wake_up_interruptible(&port->open_wait);
}
if (port->flags & ASYNC_CTS_FLOW) {
if (port->tty->hw_stopped) {
if (status & UART_MSR_CTS) {
port->tty->hw_stopped = 0;
if ((port->type != PORT_16550A) &&
(!port->board->chip_flag)) {
outb(port->IER & ~UART_IER_THRI,
port->ioaddr + UART_IER);
port->IER |= UART_IER_THRI;
outb(port->IER, port->ioaddr +
UART_IER);
}
tty_wakeup(port->tty);
}
} else {
if (!(status & UART_MSR_CTS)) {
port->tty->hw_stopped = 1;
if (port->type != PORT_16550A &&
!port->board->chip_flag) {
port->IER &= ~UART_IER_THRI;
outb(port->IER, port->ioaddr +
UART_IER);
}
}
}
}
}
static int mxser_startup(struct mxser_port *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->ioaddr || !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->board->chip_flag)
outb((UART_FCR_CLEAR_RCVR |
UART_FCR_CLEAR_XMIT |
MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
else
outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
info->ioaddr + UART_FCR);
/*
* At this point there's no way the LSR could still be 0xFF;
* if it is, then bail out, because there's likely no UART
* here.
*/
if (inb(info->ioaddr + UART_LSR) == 0xff) {
spin_unlock_irqrestore(&info->slock, flags);
if (capable(CAP_SYS_ADMIN)) {
if (info->tty)
set_bit(TTY_IO_ERROR, &info->tty->flags);
return 0;
} else
return -ENODEV;
}
/*
* Clear the interrupt registers.
*/
(void) inb(info->ioaddr + UART_LSR);
(void) inb(info->ioaddr + UART_RX);
(void) inb(info->ioaddr + UART_IIR);
(void) inb(info->ioaddr + UART_MSR);
/*
* Now, initialize the UART
*/
outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
info->MCR = UART_MCR_DTR | UART_MCR_RTS;
outb(info->MCR, info->ioaddr + UART_MCR);
/*
* Finally, enable interrupts
*/
info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
if (info->board->chip_flag)
info->IER |= MOXA_MUST_IER_EGDAI;
outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
/*
* And clear the interrupt registers again for luck.
*/
(void) inb(info->ioaddr + UART_LSR);
(void) inb(info->ioaddr + UART_RX);
(void) inb(info->ioaddr + UART_IIR);
(void) inb(info->ioaddr + UART_MSR);
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
*/
mxser_change_speed(info, NULL);
info->flags |= ASYNC_INITIALIZED;
spin_unlock_irqrestore(&info->slock, flags);
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_port *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->ioaddr + UART_IER);
if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
outb(info->MCR, info->ioaddr + UART_MCR);
/* clear Rx/Tx FIFO's */
if (info->board->chip_flag)
outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
MOXA_MUST_FCR_GDA_MODE_ENABLE,
info->ioaddr + UART_FCR);
else
outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
info->ioaddr + UART_FCR);
/* read data port to reset things */
(void) inb(info->ioaddr + UART_RX);
if (info->tty)
set_bit(TTY_IO_ERROR, &info->tty->flags);
info->flags &= ~ASYNC_INITIALIZED;
if (info->board->chip_flag)
SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
spin_unlock_irqrestore(&info->slock, flags);
}
/*
* This routine is called whenever a serial port is opened. It
* enables interrupts for a serial port, linking in its async structure into
* the IRQ chain. It also performs the serial-specific
* initialization for the tty structure.
*/
static int mxser_open(struct tty_struct *tty, struct file *filp)
{
struct mxser_port *info;
unsigned long flags;
int retval, line;
line = tty->index;
if (line == MXSER_PORTS)
return 0;
if (line < 0 || line > MXSER_PORTS)
return -ENODEV;
info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
if (!info->ioaddr)
return -ENODEV;
tty->driver_data = info;
info->tty = tty;
/*
* Start up serial port
*/
spin_lock_irqsave(&info->slock, flags);
info->count++;
spin_unlock_irqrestore(&info->slock, flags);
retval = mxser_startup(info);
if (retval)
return retval;
retval = mxser_block_til_ready(tty, filp, info);
if (retval)
return retval;
/* unmark here for very high baud rate (ex. 921600 bps) used */
tty->low_latency = 1;
return 0;
}
static void mxser_flush_buffer(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
char fcr;
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
fcr = inb(info->ioaddr + UART_FCR);
outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
info->ioaddr + UART_FCR);
outb(fcr, info->ioaddr + UART_FCR);
spin_unlock_irqrestore(&info->slock, flags);
tty_wakeup(tty);
}
/*
* This routine is called when the serial port gets closed. First, we
* wait for the last remaining data to be sent. Then, we unlink its
* async structure from the interrupt chain if necessary, and we free
* that IRQ if nothing is left in the chain.
*/
static void mxser_close(struct tty_struct *tty, struct file *filp)
{
struct mxser_port *info = tty->driver_data;
unsigned long timeout;
unsigned long flags;
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", tty->index, 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->board->chip_flag)
info->IER &= ~MOXA_MUST_RECV_ISR;
if (info->flags & ASYNC_INITIALIZED) {
outb(info->IER, info->ioaddr + UART_IER);
/*
* Before we drop DTR, make sure the UART transmitter
* has completely drained; this is especially
* important if there is a transmit FIFO!
*/
timeout = jiffies + HZ;
while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
schedule_timeout_interruptible(5);
if (time_after(jiffies, timeout))
break;
}
}
mxser_shutdown(info);
mxser_flush_buffer(tty);
tty_ldisc_flush(tty);
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);
}
static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
{
int c, total = 0;
struct mxser_port *info = tty->driver_data;
unsigned long flags;
if (!info->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) {
if (!tty->hw_stopped ||
(info->type == PORT_16550A) ||
(info->board->chip_flag)) {
spin_lock_irqsave(&info->slock, flags);
outb(info->IER & ~UART_IER_THRI, info->ioaddr +
UART_IER);
info->IER |= UART_IER_THRI;
outb(info->IER, info->ioaddr + UART_IER);
spin_unlock_irqrestore(&info->slock, flags);
}
}
return total;
}
static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
{
struct mxser_port *info = tty->driver_data;
unsigned long flags;
if (!info->xmit_buf)
return 0;
if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
return 0;
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) {
if (!tty->hw_stopped ||
(info->type == PORT_16550A) ||
info->board->chip_flag) {
spin_lock_irqsave(&info->slock, flags);
outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
info->IER |= UART_IER_THRI;
outb(info->IER, info->ioaddr + UART_IER);
spin_unlock_irqrestore(&info->slock, flags);
}
}
return 1;
}
static void mxser_flush_chars(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
unsigned long flags;
if (info->xmit_cnt <= 0 ||
tty->stopped ||
!info->xmit_buf ||
(tty->hw_stopped &&
(info->type != PORT_16550A) &&
(!info->board->chip_flag)
))
return;
spin_lock_irqsave(&info->slock, flags);
outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
info->IER |= UART_IER_THRI;
outb(info->IER, info->ioaddr + UART_IER);
spin_unlock_irqrestore(&info->slock, flags);
}
static int mxser_write_room(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
int ret;
ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
if (ret < 0)
ret = 0;
return ret;
}
static int mxser_chars_in_buffer(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
return info->xmit_cnt;
}
/*
* ------------------------------------------------------------
* friends of mxser_ioctl()
* ------------------------------------------------------------
*/
static int mxser_get_serial_info(struct mxser_port *info,
struct serial_struct __user *retinfo)
{
struct serial_struct tmp = {
.type = info->type,
.line = info->tty->index,
.port = info->ioaddr,
.irq = info->board->irq,
.flags = info->flags,
.baud_base = info->baud_base,
.close_delay = info->close_delay,
.closing_wait = info->closing_wait,
.custom_divisor = info->custom_divisor,
.hub6 = 0
};
if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
return -EFAULT;
return 0;
}
static int mxser_set_serial_info(struct mxser_port *info,
struct serial_struct __user *new_info)
{
struct serial_struct new_serial;
speed_t baud;
unsigned long sl_flags;
unsigned int flags;
int retval = 0;
if (!new_info || !info->ioaddr)
return -ENODEV;
if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
return -EFAULT;
if (new_serial.irq != info->board->irq ||
new_serial.port != info->ioaddr)
return -EINVAL;
flags = 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;
if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
(new_serial.baud_base != info->baud_base ||
new_serial.custom_divisor !=
info->custom_divisor)) {
baud = new_serial.baud_base / new_serial.custom_divisor;
tty_encode_baud_rate(info->tty, baud, baud);
}
}
info->type = new_serial.type;
process_txrx_fifo(info);
if (info->flags & ASYNC_INITIALIZED) {
if (flags != (info->flags & ASYNC_SPD_MASK)) {
spin_lock_irqsave(&info->slock, sl_flags);
mxser_change_speed(info, NULL);
spin_unlock_irqrestore(&info->slock, sl_flags);
}
} 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_port *info,
unsigned int __user *value)
{
unsigned char status;
unsigned int result;
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
status = inb(info->ioaddr + UART_LSR);
spin_unlock_irqrestore(&info->slock, flags);
result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
return put_user(result, value);
}
/*
* This routine sends a break character out the serial port.
*/
static void mxser_send_break(struct mxser_port *info, int duration)
{
unsigned long flags;
if (!info->ioaddr)
return;
set_current_state(TASK_INTERRUPTIBLE);
spin_lock_irqsave(&info->slock, flags);
outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
info->ioaddr + UART_LCR);
spin_unlock_irqrestore(&info->slock, flags);
schedule_timeout(duration);
spin_lock_irqsave(&info->slock, flags);
outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
info->ioaddr + UART_LCR);
spin_unlock_irqrestore(&info->slock, flags);
}
static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
{
struct mxser_port *info = tty->driver_data;
unsigned char control, status;
unsigned long flags;
if (tty->index == MXSER_PORTS)
return -ENOIOCTLCMD;
if (test_bit(TTY_IO_ERROR, &tty->flags))
return -EIO;
control = info->MCR;
spin_lock_irqsave(&info->slock, flags);
status = inb(info->ioaddr + UART_MSR);
if (status & UART_MSR_ANY_DELTA)
mxser_check_modem_status(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_port *info = tty->driver_data;
unsigned long flags;
if (tty->index == MXSER_PORTS)
return -ENOIOCTLCMD;
if (test_bit(TTY_IO_ERROR, &tty->flags))
return -EIO;
spin_lock_irqsave(&info->slock, flags);
if (set & TIOCM_RTS)
info->MCR |= UART_MCR_RTS;
if (set & TIOCM_DTR)
info->MCR |= UART_MCR_DTR;
if (clear & TIOCM_RTS)
info->MCR &= ~UART_MCR_RTS;
if (clear & TIOCM_DTR)
info->MCR &= ~UART_MCR_DTR;
outb(info->MCR, info->ioaddr + UART_MCR);
spin_unlock_irqrestore(&info->slock, flags);
return 0;
}
static int __init mxser_program_mode(int port)
{
int id, i, j, n;
outb(0, port);
outb(0, port);
outb(0, port);
(void)inb(port);
(void)inb(port);
outb(0, port);
(void)inb(port);
id = inb(port + 1) & 0x1F;
if ((id != C168_ASIC_ID) &&
(id != C104_ASIC_ID) &&
(id != C102_ASIC_ID) &&
(id != CI132_ASIC_ID) &&
(id != CI134_ASIC_ID) &&
(id != CI104J_ASIC_ID))
return -1;
for (i = 0, j = 0; i < 4; i++) {
n = inb(port + 2);
if (n == 'M') {
j = 1;
} else if ((j == 1) && (n == 1)) {
j = 2;
break;
} else
j = 0;
}
if (j != 2)
id = -2;
return id;
}
static void __init mxser_normal_mode(int port)
{
int i, n;
outb(0xA5, port + 1);
outb(0x80, port + 3);
outb(12, port + 0); /* 9600 bps */
outb(0, port + 1);
outb(0x03, port + 3); /* 8 data bits */
outb(0x13, port + 4); /* loop back mode */
for (i = 0; i < 16; i++) {
n = inb(port + 5);
if ((n & 0x61) == 0x60)
break;
if ((n & 1) == 1)
(void)inb(port);
}
outb(0x00, port + 4);
}
#define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
#define CHIP_DO 0x02 /* Serial Data Output in Eprom */
#define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
#define CHIP_DI 0x08 /* Serial Data Input in Eprom */
#define EN_CCMD 0x000 /* Chip's command register */
#define EN0_RSARLO 0x008 /* Remote start address reg 0 */
#define EN0_RSARHI 0x009 /* Remote start address reg 1 */
#define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
#define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
#define EN0_DCFG 0x00E /* Data configuration reg WR */
#define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
#define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
#define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
static int __init mxser_read_register(int port, unsigned short *regs)
{
int i, k, value, id;
unsigned int j;
id = mxser_program_mode(port);
if (id < 0)
return id;
for (i = 0; i < 14; i++) {
k = (i & 0x3F) | 0x180;
for (j = 0x100; j > 0; j >>= 1) {
outb(CHIP_CS, port);
if (k & j) {
outb(CHIP_CS | CHIP_DO, port);
outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
} else {
outb(CHIP_CS, port);
outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
}
}
(void)inb(port);
value = 0;
for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
outb(CHIP_CS, port);
outb(CHIP_CS | CHIP_SK, port);
if (inb(port) & CHIP_DI)
value |= j;
}
regs[i] = value;
outb(0, port);
}
mxser_normal_mode(port);
return id;
}
static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
{
struct mxser_port *port;
int result, status;
unsigned int i, j;
int ret = 0;
switch (cmd) {
case MOXA_GET_MAJOR:
return put_user(ttymajor, (int __user *)argp);
case MOXA_CHKPORTENABLE:
result = 0;
lock_kernel();
for (i = 0; i < MXSER_BOARDS; i++)
for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
if (mxser_boards[i].ports[j].ioaddr)
result |= (1 << i);
unlock_kernel();
return put_user(result, (unsigned long __user *)argp);
case MOXA_GETDATACOUNT:
lock_kernel();
if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
ret = -EFAULT;
unlock_kernel();
return ret;
case MOXA_GETMSTATUS:
lock_kernel();
for (i = 0; i < MXSER_BOARDS; i++)
for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
port = &mxser_boards[i].ports[j];
GMStatus[i].ri = 0;
if (!port->ioaddr) {
GMStatus[i].dcd = 0;
GMStatus[i].dsr = 0;
GMStatus[i].cts = 0;
continue;
}
if (!port->tty || !port->tty->termios)
GMStatus[i].cflag =
port->normal_termios.c_cflag;
else
GMStatus[i].cflag =
port->tty->termios->c_cflag;
status = inb(port->ioaddr + 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;
}
unlock_kernel();
if (copy_to_user(argp, GMStatus,
sizeof(struct mxser_mstatus) * MXSER_PORTS))
return -EFAULT;
return 0;
case MOXA_ASPP_MON_EXT: {
int p, shiftbit;
unsigned long opmode;
unsigned cflag, iflag;
lock_kernel();
for (i = 0; i < MXSER_BOARDS; i++) {
for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
port = &mxser_boards[i].ports[j];
if (!port->ioaddr)
continue;
status = mxser_get_msr(port->ioaddr, 0, i);
if (status & UART_MSR_TERI)
port->icount.rng++;
if (status & UART_MSR_DDSR)
port->icount.dsr++;
if (status & UART_MSR_DDCD)
port->icount.dcd++;
if (status & UART_MSR_DCTS)
port->icount.cts++;
port->mon_data.modem_status = status;
mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt;
mon_data_ext.tx_cnt[i] = port->mon_data.txcnt;
mon_data_ext.up_rxcnt[i] =
port->mon_data.up_rxcnt;
mon_data_ext.up_txcnt[i] =
port->mon_data.up_txcnt;
mon_data_ext.modem_status[i] =
port->mon_data.modem_status;
mon_data_ext.baudrate[i] =
tty_get_baud_rate(port->tty);
if (!port->tty || !port->tty->termios) {
cflag = port->normal_termios.c_cflag;
iflag = port->normal_termios.c_iflag;
} else {
cflag = port->tty->termios->c_cflag;
iflag = port->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 (port->type == PORT_16550A)
mon_data_ext.fifo[i] = 1;
else
mon_data_ext.fifo[i] = 0;
p = i % 4;
shiftbit = p * 2;
opmode = inb(port->opmode_ioaddr) >> shiftbit;
opmode &= OP_MODE_MASK;
mon_data_ext.iftype[i] = opmode;
}
}
unlock_kernel();
if (copy_to_user(argp, &mon_data_ext,
sizeof(mon_data_ext)))
return -EFAULT;
return 0;
}
default:
return -ENOIOCTLCMD;
}
return 0;
}
static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
struct async_icount *cprev)
{
struct async_icount cnow;
unsigned long flags;
int ret;
spin_lock_irqsave(&info->slock, flags);
cnow = info->icount; /* atomic copy */
spin_unlock_irqrestore(&info->slock, flags);
ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
*cprev = cnow;
return ret;
}
static int mxser_ioctl(struct tty_struct *tty, struct file *file,
unsigned int cmd, unsigned long arg)
{
struct mxser_port *info = tty->driver_data;
struct async_icount cnow;
struct serial_icounter_struct __user *p_cuser;
unsigned long flags;
void __user *argp = (void __user *)arg;
int retval;
if (tty->index == MXSER_PORTS)
return mxser_ioctl_special(cmd, argp);
if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
int p;
unsigned long opmode;
static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
int shiftbit;
unsigned char val, mask;
p = tty->index % 4;
if (cmd == MOXA_SET_OP_MODE) {
if (get_user(opmode, (int __user *) argp))
return -EFAULT;
if (opmode != RS232_MODE &&
opmode != RS485_2WIRE_MODE &&
opmode != RS422_MODE &&
opmode != RS485_4WIRE_MODE)
return -EFAULT;
lock_kernel();
mask = ModeMask[p];
shiftbit = p * 2;
val = inb(info->opmode_ioaddr);
val &= mask;
val |= (opmode << shiftbit);
outb(val, info->opmode_ioaddr);
unlock_kernel();
} else {
lock_kernel();
shiftbit = p * 2;
opmode = inb(info->opmode_ioaddr) >> shiftbit;
opmode &= OP_MODE_MASK;
unlock_kernel();
if (put_user(opmode, (int __user *)argp))
return -EFAULT;
}
return 0;
}
if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
test_bit(TTY_IO_ERROR, &tty->flags))
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 TIOCGSERIAL:
lock_kernel();
retval = mxser_get_serial_info(info, argp);
unlock_kernel();
return retval;
case TIOCSSERIAL:
lock_kernel();
retval = mxser_set_serial_info(info, argp);
unlock_kernel();
return retval;
case TIOCSERGETLSR: /* Get line status register */
return mxser_get_lsr_info(info, argp);
/*
* Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
* - mask passed in arg for lines of interest
* (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
* Caller should use TIOCGICOUNT to see which one it was
*/
case TIOCMIWAIT:
spin_lock_irqsave(&info->slock, flags);
cnow = info->icount; /* note the counters on entry */
spin_unlock_irqrestore(&info->slock, flags);
return wait_event_interruptible(info->delta_msr_wait,
mxser_cflags_changed(info, arg, &cnow));
/*
* 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;
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:
lock_kernel();
info->mon_data.rxcnt = 0;
info->mon_data.txcnt = 0;
unlock_kernel();
return 0;
case MOXA_ASPP_OQUEUE:{
int len, lsr;
lock_kernel();
len = mxser_chars_in_buffer(tty);
lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
len += (lsr ? 0 : 1);
unlock_kernel();
return put_user(len, (int __user *)argp);
}
case MOXA_ASPP_MON: {
int mcr, status;
lock_kernel();
status = mxser_get_msr(info->ioaddr, 1, tty->index);
mxser_check_modem_status(info, status);
mcr = inb(info->ioaddr + 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;
unlock_kernel();
if (copy_to_user(argp, &info->mon_data,
sizeof(struct mxser_mon)))
return -EFAULT;
return 0;
}
case MOXA_ASPP_LSTATUS: {
if (put_user(info->err_shadow, (unsigned char __user *)argp))
return -EFAULT;
info->err_shadow = 0;
return 0;
}
case MOXA_SET_BAUD_METHOD: {
int method;
if (get_user(method, (int __user *)argp))
return -EFAULT;
mxser_set_baud_method[tty->index] = method;
return put_user(method, (int __user *)argp);
}
default:
return -ENOIOCTLCMD;
}
return 0;
}
static void mxser_stoprx(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
info->ldisc_stop_rx = 1;
if (I_IXOFF(tty)) {
if (info->board->chip_flag) {
info->IER &= ~MOXA_MUST_RECV_ISR;
outb(info->IER, info->ioaddr + UART_IER);
} else {
info->x_char = STOP_CHAR(tty);
outb(0, info->ioaddr + UART_IER);
info->IER |= UART_IER_THRI;
outb(info->IER, info->ioaddr + UART_IER);
}
}
if (info->tty->termios->c_cflag & CRTSCTS) {
info->MCR &= ~UART_MCR_RTS;
outb(info->MCR, info->ioaddr + UART_MCR);
}
}
/*
* This routine is called by the upper-layer tty layer to signal that
* incoming characters should be throttled.
*/
static void mxser_throttle(struct tty_struct *tty)
{
mxser_stoprx(tty);
}
static void mxser_unthrottle(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
/* startrx */
info->ldisc_stop_rx = 0;
if (I_IXOFF(tty)) {
if (info->x_char)
info->x_char = 0;
else {
if (info->board->chip_flag) {
info->IER |= MOXA_MUST_RECV_ISR;
outb(info->IER, info->ioaddr + UART_IER);
} else {
info->x_char = START_CHAR(tty);
outb(0, info->ioaddr + UART_IER);
info->IER |= UART_IER_THRI;
outb(info->IER, info->ioaddr + UART_IER);
}
}
}
if (info->tty->termios->c_cflag & CRTSCTS) {
info->MCR |= UART_MCR_RTS;
outb(info->MCR, info->ioaddr + UART_MCR);
}
}
/*
* mxser_stop() and mxser_start()
*
* This routines are called before setting or resetting tty->stopped.
* They enable or disable transmitter interrupts, as necessary.
*/
static void mxser_stop(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
if (info->IER & UART_IER_THRI) {
info->IER &= ~UART_IER_THRI;
outb(info->IER, info->ioaddr + UART_IER);
}
spin_unlock_irqrestore(&info->slock, flags);
}
static void mxser_start(struct tty_struct *tty)
{
struct mxser_port *info = tty->driver_data;
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
if (info->xmit_cnt && info->xmit_buf) {
outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
info->IER |= UART_IER_THRI;
outb(info->IER, info->ioaddr + UART_IER);
}
spin_unlock_irqrestore(&info->slock, flags);
}
static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
{
struct mxser_port *info = tty->driver_data;
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
mxser_change_speed(info, old_termios);
spin_unlock_irqrestore(&info->slock, flags);
if ((old_termios->c_cflag & CRTSCTS) &&
!(tty->termios->c_cflag & CRTSCTS)) {
tty->hw_stopped = 0;
mxser_start(tty);
}
/* Handle sw stopped */
if ((old_termios->c_iflag & IXON) &&
!(tty->termios->c_iflag & IXON)) {
tty->stopped = 0;
if (info->board->chip_flag) {
spin_lock_irqsave(&info->slock, flags);
mxser_disable_must_rx_software_flow_control(
info->ioaddr);
spin_unlock_irqrestore(&info->slock, flags);
}
mxser_start(tty);
}
}
/*
* mxser_wait_until_sent() --- wait until the transmitter is empty
*/
static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
{
struct mxser_port *info = tty->driver_data;
unsigned long orig_jiffies, char_time;
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
lock_kernel();
while (!((lsr = inb(info->ioaddr + 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);
unlock_kernel();
#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.
*/
static void mxser_hangup(struct tty_struct *tty)
{
struct mxser_port *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);
}
/*
* 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_port *info = tty->driver_data;
unsigned long flags;
spin_lock_irqsave(&info->slock, flags);
if (break_state == -1)
outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
info->ioaddr + UART_LCR);
else
outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
info->ioaddr + UART_LCR);
spin_unlock_irqrestore(&info->slock, flags);
}
static void mxser_receive_chars(struct mxser_port *port, int *status)
{
struct tty_struct *tty = port->tty;
unsigned char ch, gdl;
int ignored = 0;
int cnt = 0;
int recv_room;
int max = 256;
recv_room = tty->receive_room;
if ((recv_room == 0) && (!port->ldisc_stop_rx))
mxser_stoprx(tty);
if (port->board->chip_flag != MOXA_OTHER_UART) {
if (*status & UART_LSR_SPECIAL)
goto intr_old;
if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
(*status & MOXA_MUST_LSR_RERR))
goto intr_old;
if (*status & MOXA_MUST_LSR_RERR)
goto intr_old;
gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
gdl &= MOXA_MUST_GDL_MASK;
if (gdl >= recv_room) {
if (!port->ldisc_stop_rx)
mxser_stoprx(tty);
}
while (gdl--) {
ch = inb(port->ioaddr + UART_RX);
tty_insert_flip_char(tty, ch, 0);
cnt++;
}
goto end_intr;
}
intr_old:
do {
if (max-- < 0)
break;
ch = inb(port->ioaddr + UART_RX);
if (port->board->chip_flag && (*status & UART_LSR_OE))
outb(0x23, port->ioaddr + UART_FCR);
*status &= port->read_status_mask;
if (*status & port->ignore_status_mask) {
if (++ignored > 100)
break;
} else {
char flag = 0;
if (*status & UART_LSR_SPECIAL) {
if (*status & UART_LSR_BI) {
flag = TTY_BREAK;
port->icount.brk++;
if (port->flags & ASYNC_SAK)
do_SAK(tty);
} else if (*status & UART_LSR_PE) {
flag = TTY_PARITY;
port->icount.parity++;
} else if (*status & UART_LSR_FE) {
flag = TTY_FRAME;
port->icount.frame++;
} else if (*status & UART_LSR_OE) {
flag = TTY_OVERRUN;
port->icount.overrun++;
} else
flag = TTY_BREAK;
}
tty_insert_flip_char(tty, ch, flag);
cnt++;
if (cnt >= recv_room) {
if (!port->ldisc_stop_rx)
mxser_stoprx(tty);
break;
}
}
if (port->board->chip_flag)
break;
*status = inb(port->ioaddr + UART_LSR);
} while (*status & UART_LSR_DR);
end_intr:
mxvar_log.rxcnt[port->tty->index] += cnt;
port->mon_data.rxcnt += cnt;
port->mon_data.up_rxcnt += cnt;
/*
* We are called from an interrupt context with &port->slock
* being held. Drop it temporarily in order to prevent
* recursive locking.
*/
spin_unlock(&port->slock);
tty_flip_buffer_push(tty);
spin_lock(&port->slock);
}
static void mxser_transmit_chars(struct mxser_port *port)
{
int count, cnt;
if (port->x_char) {
outb(port->x_char, port->ioaddr + UART_TX);
port->x_char = 0;
mxvar_log.txcnt[port->tty->index]++;
port->mon_data.txcnt++;
port->mon_data.up_txcnt++;
port->icount.tx++;
return;
}
if (port->xmit_buf == NULL)
return;
if ((port->xmit_cnt <= 0) || port->tty->stopped ||
(port->tty->hw_stopped &&
(port->type != PORT_16550A) &&
(!port->board->chip_flag))) {
port->IER &= ~UART_IER_THRI;
outb(port->IER, port->ioaddr + UART_IER);
return;
}
cnt = port->xmit_cnt;
count = port->xmit_fifo_size;
do {
outb(port->xmit_buf[port->xmit_tail++],
port->ioaddr + UART_TX);
port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
if (--port->xmit_cnt <= 0)
break;
} while (--count > 0);
mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt);
port->mon_data.txcnt += (cnt - port->xmit_cnt);
port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
port->icount.tx += (cnt - port->xmit_cnt);
if (port->xmit_cnt < WAKEUP_CHARS)
tty_wakeup(port->tty);
if (port->xmit_cnt <= 0) {
port->IER &= ~UART_IER_THRI;
outb(port->IER, port->ioaddr + UART_IER);
}
}
/*
* This is the serial driver's generic interrupt routine
*/
static irqreturn_t mxser_interrupt(int irq, void *dev_id)
{
int status, iir, i;
struct mxser_board *brd = NULL;
struct mxser_port *port;
int max, irqbits, bits, msr;
unsigned int int_cnt, pass_counter = 0;
int handled = IRQ_NONE;
for (i = 0; i < MXSER_BOARDS; i++)
if (dev_id == &mxser_boards[i]) {
brd = dev_id;
break;
}
if (i == MXSER_BOARDS)
goto irq_stop;
if (brd == NULL)
goto irq_stop;
max = brd->info->nports;
while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
irqbits = inb(brd->vector) & brd->vector_mask;
if (irqbits == brd->vector_mask)
break;
handled = IRQ_HANDLED;
for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
if (irqbits == brd->vector_mask)
break;
if (bits & irqbits)
continue;
port = &brd->ports[i];
int_cnt = 0;
spin_lock(&port->slock);
do {
iir = inb(port->ioaddr + UART_IIR);
if (iir & UART_IIR_NO_INT)
break;
iir &= MOXA_MUST_IIR_MASK;
if (!port->tty ||
(port->flags & ASYNC_CLOSING) ||
!(port->flags &
ASYNC_INITIALIZED)) {
status = inb(port->ioaddr + UART_LSR);
outb(0x27, port->ioaddr + UART_FCR);
inb(port->ioaddr + UART_MSR);
break;
}
status = inb(port->ioaddr + UART_LSR);
if (status & UART_LSR_PE)
port->err_shadow |= NPPI_NOTIFY_PARITY;
if (status & UART_LSR_FE)
port->err_shadow |= NPPI_NOTIFY_FRAMING;
if (status & UART_LSR_OE)
port->err_shadow |=
NPPI_NOTIFY_HW_OVERRUN;
if (status & UART_LSR_BI)
port->err_shadow |= NPPI_NOTIFY_BREAK;
if (port->board->chip_flag) {
if (iir == MOXA_MUST_IIR_GDA ||
iir == MOXA_MUST_IIR_RDA ||
iir == MOXA_MUST_IIR_RTO ||
iir == MOXA_MUST_IIR_LSR)
mxser_receive_chars(port,
&status);
} else {
status &= port->read_status_mask;
if (status & UART_LSR_DR)
mxser_receive_chars(port,
&status);
}
msr = inb(port->ioaddr + UART_MSR);
if (msr & UART_MSR_ANY_DELTA)
mxser_check_modem_status(port, msr);
if (port->board->chip_flag) {
if (iir == 0x02 && (status &
UART_LSR_THRE))
mxser_transmit_chars(port);
} else {
if (status & UART_LSR_THRE)
mxser_transmit_chars(port);
}
} while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
spin_unlock(&port->slock);
}
}
irq_stop:
return handled;
}
static const struct tty_operations mxser_ops = {
.open = mxser_open,
.close = mxser_close,
.write = mxser_write,
.put_char = mxser_put_char,
.flush_chars = mxser_flush_chars,
.write_room = mxser_write_room,
.chars_in_buffer = mxser_chars_in_buffer,
.flush_buffer = mxser_flush_buffer,
.ioctl = mxser_ioctl,
.throttle = mxser_throttle,
.unthrottle = mxser_unthrottle,
.set_termios = mxser_set_termios,
.stop = mxser_stop,
.start = mxser_start,
.hangup = mxser_hangup,
.break_ctl = mxser_rs_break,
.wait_until_sent = mxser_wait_until_sent,
.tiocmget = mxser_tiocmget,
.tiocmset = mxser_tiocmset,
};
/*
* The MOXA Smartio/Industio serial driver boot-time initialization code!
*/
static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev,
unsigned int irq)
{
if (irq)
free_irq(brd->irq, brd);
if (pdev != NULL) { /* PCI */
#ifdef CONFIG_PCI
pci_release_region(pdev, 2);
pci_release_region(pdev, 3);
#endif
} else {
release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
release_region(brd->vector, 1);
}
}
static int __devinit mxser_initbrd(struct mxser_board *brd,
struct pci_dev *pdev)
{
struct mxser_port *info;
unsigned int i;
int retval;
printk(KERN_INFO "max. baud rate = %d bps.\n", brd->ports[0].max_baud);
for (i = 0; i < brd->info->nports; i++) {
info = &brd->ports[i];
info->board = brd;
info->stop_rx = 0;
info->ldisc_stop_rx = 0;
/* Enhance mode enabled here */
if (brd->chip_flag != MOXA_OTHER_UART)
mxser_enable_must_enchance_mode(info->ioaddr);
info->flags = ASYNC_SHARE_IRQ;
info->type = brd->uart_type;
process_txrx_fifo(info);
info->custom_divisor = info->baud_base * 16;
info->close_delay = 5 * HZ / 10;
info->closing_wait = 30 * HZ;
info->normal_termios = mxvar_sdriver->init_termios;
init_waitqueue_head(&info->open_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);
/* before set INT ISR, disable all int */
outb(inb(info->ioaddr + UART_IER) & 0xf0,
info->ioaddr + UART_IER);
}
retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
brd);
if (retval) {
printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
"conflict with another device.\n",
brd->info->name, brd->irq);
/* We hold resources, we need to release them. */
mxser_release_res(brd, pdev, 0);
}
return retval;
}
static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
{
int id, i, bits;
unsigned short regs[16], irq;
unsigned char scratch, scratch2;
brd->chip_flag = MOXA_OTHER_UART;
id = mxser_read_register(cap, regs);
switch (id) {
case C168_ASIC_ID:
brd->info = &mxser_cards[0];
break;
case C104_ASIC_ID:
brd->info = &mxser_cards[1];
break;
case CI104J_ASIC_ID:
brd->info = &mxser_cards[2];
break;
case C102_ASIC_ID:
brd->info = &mxser_cards[5];
break;
case CI132_ASIC_ID:
brd->info = &mxser_cards[6];
break;
case CI134_ASIC_ID:
brd->info = &mxser_cards[7];
break;
default:
return 0;
}
irq = 0;
/* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
Flag-hack checks if configuration should be read as 2-port here. */
if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
irq = regs[9] & 0xF000;
irq = irq | (irq >> 4);
if (irq != (regs[9] & 0xFF00))
return MXSER_ERR_IRQ_CONFLIT;
} else if (brd->info->nports == 4) {
irq = regs[9] & 0xF000;
irq = irq | (irq >> 4);
irq = irq | (irq >> 8);
if (irq != regs[9])
return MXSER_ERR_IRQ_CONFLIT;
} else if (brd->info->nports == 8) {
irq = regs[9] & 0xF000;
irq = irq | (irq >> 4);
irq = irq | (irq >> 8);
if ((irq != regs[9]) || (irq != regs[10]))
return MXSER_ERR_IRQ_CONFLIT;
}
if (!irq)
return MXSER_ERR_IRQ;
brd->irq = ((int)(irq & 0xF000) >> 12);
for (i = 0; i < 8; i++)
brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
if ((regs[12] & 0x80) == 0)
return MXSER_ERR_VECTOR;
brd->vector = (int)regs[11]; /* interrupt vector */
if (id == 1)
brd->vector_mask = 0x00FF;
else
brd->vector_mask = 0x000F;
for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
if (regs[12] & bits) {
brd->ports[i].baud_base = 921600;
brd->ports[i].max_baud = 921600;
} else {
brd->ports[i].baud_base = 115200;
brd->ports[i].max_baud = 115200;
}
}
scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
outb(0, cap + UART_EFR); /* EFR is the same as FCR */
outb(scratch2, cap + UART_LCR);
outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
scratch = inb(cap + UART_IIR);
if (scratch & 0xC0)
brd->uart_type = PORT_16550A;
else
brd->uart_type = PORT_16450;
if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
"mxser(IO)"))
return MXSER_ERR_IOADDR;
if (!request_region(brd->vector, 1, "mxser(vector)")) {
release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
return MXSER_ERR_VECTOR;
}
return brd->info->nports;
}
static int __devinit mxser_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
#ifdef CONFIG_PCI
struct mxser_board *brd;
unsigned int i, j;
unsigned long ioaddress;
int retval = -EINVAL;
for (i = 0; i < MXSER_BOARDS; i++)
if (mxser_boards[i].info == NULL)
break;
if (i >= MXSER_BOARDS) {
printk(KERN_ERR "Too many Smartio/Industio family boards found "
"(maximum %d), board not configured\n", MXSER_BOARDS);
goto err;
}
brd = &mxser_boards[i];
brd->idx = i * MXSER_PORTS_PER_BOARD;
printk(KERN_INFO "Found MOXA %s board (BusNo=%d, DevNo=%d)\n",
mxser_cards[ent->driver_data].name,
pdev->bus->number, PCI_SLOT(pdev->devfn));
retval = pci_enable_device(pdev);
if (retval) {
printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
goto err;
}
/* io address */
ioaddress = pci_resource_start(pdev, 2);
retval = pci_request_region(pdev, 2, "mxser(IO)");
if (retval)
goto err;
brd->info = &mxser_cards[ent->driver_data];
for (i = 0; i < brd->info->nports; i++)
brd->ports[i].ioaddr = ioaddress + 8 * i;
/* vector */
ioaddress = pci_resource_start(pdev, 3);
retval = pci_request_region(pdev, 3, "mxser(vector)");
if (retval)
goto err_relio;
brd->vector = ioaddress;
/* irq */
brd->irq = pdev->irq;
brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
brd->uart_type = PORT_16550A;
brd->vector_mask = 0;
for (i = 0; i < brd->info->nports; i++) {
for (j = 0; j < UART_INFO_NUM; j++) {
if (Gpci_uart_info[j].type == brd->chip_flag) {
brd->ports[i].max_baud =
Gpci_uart_info[j].max_baud;
/* exception....CP-102 */
if (brd->info->flags & MXSER_HIGHBAUD)
brd->ports[i].max_baud = 921600;
break;
}
}
}
if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
for (i = 0; i < brd->info->nports; i++) {
if (i < 4)
brd->ports[i].opmode_ioaddr = ioaddress + 4;
else
brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
}
outb(0, ioaddress + 4); /* default set to RS232 mode */
outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
}
for (i = 0; i < brd->info->nports; i++) {
brd->vector_mask |= (1 << i);
brd->ports[i].baud_base = 921600;
}
/* mxser_initbrd will hook ISR. */
retval = mxser_initbrd(brd, pdev);
if (retval)
goto err_null;
for (i = 0; i < brd->info->nports; i++)
tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
pci_set_drvdata(pdev, brd);
return 0;
err_relio:
pci_release_region(pdev, 2);
err_null:
brd->info = NULL;
err:
return retval;
#else
return -ENODEV;
#endif
}
static void __devexit mxser_remove(struct pci_dev *pdev)
{
struct mxser_board *brd = pci_get_drvdata(pdev);
unsigned int i;
for (i = 0; i < brd->info->nports; i++)
tty_unregister_device(mxvar_sdriver, brd->idx + i);
mxser_release_res(brd, pdev, 1);
brd->info = NULL;
}
static struct pci_driver mxser_driver = {
.name = "mxser",
.id_table = mxser_pcibrds,
.probe = mxser_probe,
.remove = __devexit_p(mxser_remove)
};
static int __init mxser_module_init(void)
{
struct mxser_board *brd;
unsigned long cap;
unsigned int i, m, isaloop;
int retval, b;
pr_debug("Loading module mxser ...\n");
mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
if (!mxvar_sdriver)
return -ENOMEM;
printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
MXSER_VERSION);
/* Initialize the tty_driver structure */
mxvar_sdriver->owner = THIS_MODULE;
mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
mxvar_sdriver->name = "ttyMI";
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_DRIVER_DYNAMIC_DEV;
tty_set_operations(mxvar_sdriver, &mxser_ops);
retval = tty_register_driver(mxvar_sdriver);
if (retval) {
printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
"tty driver !\n");
goto err_put;
}
mxvar_diagflag = 0;
m = 0;
/* Start finding ISA boards here */
for (isaloop = 0; isaloop < 2; isaloop++)
for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
if (!isaloop)
cap = mxserBoardCAP[b]; /* predefined */
else
cap = ioaddr[b]; /* module param */
if (!cap)
continue;
brd = &mxser_boards[m];
retval = mxser_get_ISA_conf(cap, brd);
if (retval != 0)
printk(KERN_INFO "Found MOXA %s board "
"(CAP=0x%x)\n",
brd->info->name, 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");
brd->info = NULL;
continue;
}
/* mxser_initbrd will hook ISR. */
if (mxser_initbrd(brd, NULL) < 0) {
brd->info = NULL;
continue;
}
brd->idx = m * MXSER_PORTS_PER_BOARD;
for (i = 0; i < brd->info->nports; i++)
tty_register_device(mxvar_sdriver, brd->idx + i,
NULL);
m++;
}
retval = pci_register_driver(&mxser_driver);
if (retval) {
printk(KERN_ERR "Can't register pci driver\n");
if (!m) {
retval = -ENODEV;
goto err_unr;
} /* else: we have some ISA cards under control */
}
pr_debug("Done.\n");
return 0;
err_unr:
tty_unregister_driver(mxvar_sdriver);
err_put:
put_tty_driver(mxvar_sdriver);
return retval;
}
static void __exit mxser_module_exit(void)
{
unsigned int i, j;
pr_debug("Unloading module mxser ...\n");
pci_unregister_driver(&mxser_driver);
for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
if (mxser_boards[i].info != NULL)
for (j = 0; j < mxser_boards[i].info->nports; j++)
tty_unregister_device(mxvar_sdriver,
mxser_boards[i].idx + j);
tty_unregister_driver(mxvar_sdriver);
put_tty_driver(mxvar_sdriver);
for (i = 0; i < MXSER_BOARDS; i++)
if (mxser_boards[i].info != NULL)
mxser_release_res(&mxser_boards[i], NULL, 1);
pr_debug("Done.\n");
}
module_init(mxser_module_init);
module_exit(mxser_module_exit);
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