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-rw-r--r--drivers/char/mxser.c2757
1 files changed, 0 insertions, 2757 deletions
diff --git a/drivers/char/mxser.c b/drivers/char/mxser.c
deleted file mode 100644
index d188f378684..00000000000
--- a/drivers/char/mxser.c
+++ /dev/null
@@ -1,2757 +0,0 @@
-/*
- * 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@lxorguk.ukuu.org.uk>. The original 1.8 code is available on
- * www.moxa.com.
- * - Fixed x86_64 cleanness
- */
-
-#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/ioport.h>
-#include <linux/mm.h>
-#include <linux/delay.h>
-#include <linux/pci.h>
-#include <linux/bitops.h>
-#include <linux/slab.h>
-
-#include <asm/system.h>
-#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/uaccess.h>
-
-#include "mxser.h"
-
-#define MXSER_VERSION "2.0.5" /* 1.14 */
-#define MXSERMAJOR 174
-
-#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
-
-/*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_POS104UL 0x1044
-#define PCI_DEVICE_ID_CB108 0x1080
-#define PCI_DEVICE_ID_CP102UF 0x1023
-#define PCI_DEVICE_ID_CP112UL 0x1120
-#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 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, },
-/*30*/ { "CP-102UF series", 2, },
- { "CP-112UL series", 2, },
-};
-
-/* 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 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP102UF), .driver_data = 30 },
- { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP112UL), .driver_data = 31 },
- { }
-};
-MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
-
-static unsigned long ioaddr[MXSER_BOARDS];
-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, ulong, NULL, 0);
-MODULE_PARM_DESC(ioaddr, "ISA io addresses to look for a moxa board");
-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 tty_port port;
- struct mxser_board *board;
-
- 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 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;
- unsigned char err_shadow;
-
- struct async_icount icount; /* kernel counters for 4 input interrupts */
- int timeout;
-
- int read_status_mask;
- int ignore_status_mask;
- int xmit_fifo_size;
- int xmit_head;
- int xmit_tail;
- int xmit_cnt;
-
- struct ktermios normal_termios;
-
- struct mxser_mon mon_data;
-
- spinlock_t slock;
-};
-
-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_board mxser_boards[MXSER_BOARDS];
-static struct tty_driver *mxvar_sdriver;
-static struct mxser_log mxvar_log;
-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);
-}
-
-#ifdef CONFIG_PCI
-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);
-}
-#endif
-
-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);
-}
-
-#ifdef CONFIG_PCI
-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);
-}
-#endif
-
-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)
-{
- static unsigned char mxser_msr[MXSER_PORTS + 1];
- unsigned char status = 0;
-
- status = inb(baseaddr + UART_MSR);
-
- mxser_msr[port] &= 0x0F;
- mxser_msr[port] |= status;
- status = mxser_msr[port];
- if (mode)
- mxser_msr[port] = 0;
-
- return status;
-}
-
-static int mxser_carrier_raised(struct tty_port *port)
-{
- struct mxser_port *mp = container_of(port, struct mxser_port, port);
- return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0;
-}
-
-static void mxser_dtr_rts(struct tty_port *port, int on)
-{
- struct mxser_port *mp = container_of(port, struct mxser_port, port);
- unsigned long flags;
-
- spin_lock_irqsave(&mp->slock, flags);
- if (on)
- outb(inb(mp->ioaddr + UART_MCR) |
- UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
- else
- outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS),
- mp->ioaddr + UART_MCR);
- spin_unlock_irqrestore(&mp->slock, flags);
-}
-
-static int mxser_set_baud(struct tty_struct *tty, long newspd)
-{
- struct mxser_port *info = tty->driver_data;
- int quot = 0, baud;
- unsigned char cval;
-
- if (!info->ioaddr)
- return -1;
-
- if (newspd > info->max_baud)
- return -1;
-
- if (newspd == 134) {
- quot = 2 * info->baud_base / 269;
- tty_encode_baud_rate(tty, 134, 134);
- } else if (newspd) {
- quot = info->baud_base / newspd;
- if (quot == 0)
- quot = 1;
- baud = info->baud_base/quot;
- tty_encode_baud_rate(tty, baud, baud);
- } else {
- quot = 0;
- }
-
- info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
- info->timeout += HZ / 50; /* Add .02 seconds of slop */
-
- if (quot) {
- info->MCR |= UART_MCR_DTR;
- outb(info->MCR, info->ioaddr + UART_MCR);
- } else {
- info->MCR &= ~UART_MCR_DTR;
- outb(info->MCR, info->ioaddr + UART_MCR);
- return 0;
- }
-
- cval = inb(info->ioaddr + UART_LCR);
-
- outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
-
- outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
- outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
- outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
-
-#ifdef BOTHER
- if (C_BAUD(tty) == BOTHER) {
- quot = info->baud_base % newspd;
- quot *= 8;
- if (quot % newspd > newspd / 2) {
- quot /= newspd;
- quot++;
- } else
- quot /= newspd;
-
- mxser_set_must_enum_value(info->ioaddr, quot);
- } else
-#endif
- mxser_set_must_enum_value(info->ioaddr, 0);
-
- return 0;
-}
-
-/*
- * This routine is called to set the UART divisor registers to match
- * the specified baud rate for a serial port.
- */
-static int mxser_change_speed(struct tty_struct *tty,
- struct ktermios *old_termios)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned cflag, cval, fcr;
- int ret = 0;
- unsigned char status;
-
- cflag = tty->termios->c_cflag;
- if (!info->ioaddr)
- return ret;
-
- if (mxser_set_baud_method[tty->index] == 0)
- mxser_set_baud(tty, tty_get_baud_rate(tty));
-
- /* byte size and parity */
- switch (cflag & CSIZE) {
- case CS5:
- cval = 0x00;
- break;
- case CS6:
- cval = 0x01;
- break;
- case CS7:
- cval = 0x02;
- break;
- case CS8:
- cval = 0x03;
- break;
- default:
- cval = 0x00;
- break; /* too keep GCC shut... */
- }
- if (cflag & CSTOPB)
- cval |= 0x04;
- if (cflag & PARENB)
- cval |= UART_LCR_PARITY;
- if (!(cflag & PARODD))
- cval |= UART_LCR_EPAR;
- if (cflag & CMSPAR)
- cval |= UART_LCR_SPAR;
-
- if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
- if (info->board->chip_flag) {
- fcr = UART_FCR_ENABLE_FIFO;
- fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
- mxser_set_must_fifo_value(info);
- } else
- fcr = 0;
- } else {
- fcr = UART_FCR_ENABLE_FIFO;
- if (info->board->chip_flag) {
- fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
- mxser_set_must_fifo_value(info);
- } else {
- switch (info->rx_trigger) {
- case 1:
- fcr |= UART_FCR_TRIGGER_1;
- break;
- case 4:
- fcr |= UART_FCR_TRIGGER_4;
- break;
- case 8:
- fcr |= UART_FCR_TRIGGER_8;
- break;
- default:
- fcr |= UART_FCR_TRIGGER_14;
- break;
- }
- }
- }
-
- /* CTS flow control flag and modem status interrupts */
- info->IER &= ~UART_IER_MSI;
- info->MCR &= ~UART_MCR_AFE;
- if (cflag & CRTSCTS) {
- info->port.flags |= ASYNC_CTS_FLOW;
- info->IER |= UART_IER_MSI;
- if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
- info->MCR |= UART_MCR_AFE;
- } else {
- status = inb(info->ioaddr + UART_MSR);
- if (tty->hw_stopped) {
- if (status & UART_MSR_CTS) {
- tty->hw_stopped = 0;
- if (info->type != PORT_16550A &&
- !info->board->chip_flag) {
- outb(info->IER & ~UART_IER_THRI,
- info->ioaddr +
- UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr +
- UART_IER);
- }
- tty_wakeup(tty);
- }
- } else {
- if (!(status & UART_MSR_CTS)) {
- tty->hw_stopped = 1;
- if ((info->type != PORT_16550A) &&
- (!info->board->chip_flag)) {
- info->IER &= ~UART_IER_THRI;
- outb(info->IER, info->ioaddr +
- UART_IER);
- }
- }
- }
- }
- } else {
- info->port.flags &= ~ASYNC_CTS_FLOW;
- }
- outb(info->MCR, info->ioaddr + UART_MCR);
- if (cflag & CLOCAL) {
- info->port.flags &= ~ASYNC_CHECK_CD;
- } else {
- info->port.flags |= ASYNC_CHECK_CD;
- info->IER |= UART_IER_MSI;
- }
- outb(info->IER, info->ioaddr + UART_IER);
-
- /*
- * Set up parity check flag
- */
- info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
- if (I_INPCK(tty))
- info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
- if (I_BRKINT(tty) || I_PARMRK(tty))
- info->read_status_mask |= UART_LSR_BI;
-
- info->ignore_status_mask = 0;
-
- if (I_IGNBRK(tty)) {
- info->ignore_status_mask |= UART_LSR_BI;
- info->read_status_mask |= UART_LSR_BI;
- /*
- * If we're ignore parity and break indicators, ignore
- * overruns too. (For real raw support).
- */
- if (I_IGNPAR(tty)) {
- info->ignore_status_mask |=
- UART_LSR_OE |
- UART_LSR_PE |
- UART_LSR_FE;
- info->read_status_mask |=
- UART_LSR_OE |
- UART_LSR_PE |
- UART_LSR_FE;
- }
- }
- if (info->board->chip_flag) {
- mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty));
- mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty));
- if (I_IXON(tty)) {
- mxser_enable_must_rx_software_flow_control(
- info->ioaddr);
- } else {
- mxser_disable_must_rx_software_flow_control(
- info->ioaddr);
- }
- if (I_IXOFF(tty)) {
- mxser_enable_must_tx_software_flow_control(
- info->ioaddr);
- } else {
- mxser_disable_must_tx_software_flow_control(
- info->ioaddr);
- }
- }
-
-
- outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
- outb(cval, info->ioaddr + UART_LCR);
-
- return ret;
-}
-
-static void mxser_check_modem_status(struct tty_struct *tty,
- struct mxser_port *port, int status)
-{
- /* update input line counters */
- if (status & UART_MSR_TERI)
- port->icount.rng++;
- if (status & UART_MSR_DDSR)
- port->icount.dsr++;
- if (status & UART_MSR_DDCD)
- port->icount.dcd++;
- if (status & UART_MSR_DCTS)
- port->icount.cts++;
- port->mon_data.modem_status = status;
- wake_up_interruptible(&port->port.delta_msr_wait);
-
- if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
- if (status & UART_MSR_DCD)
- wake_up_interruptible(&port->port.open_wait);
- }
-
- if (port->port.flags & ASYNC_CTS_FLOW) {
- if (tty->hw_stopped) {
- if (status & UART_MSR_CTS) {
- tty->hw_stopped = 0;
-
- if ((port->type != PORT_16550A) &&
- (!port->board->chip_flag)) {
- outb(port->IER & ~UART_IER_THRI,
- port->ioaddr + UART_IER);
- port->IER |= UART_IER_THRI;
- outb(port->IER, port->ioaddr +
- UART_IER);
- }
- tty_wakeup(tty);
- }
- } else {
- if (!(status & UART_MSR_CTS)) {
- tty->hw_stopped = 1;
- if (port->type != PORT_16550A &&
- !port->board->chip_flag) {
- port->IER &= ~UART_IER_THRI;
- outb(port->IER, port->ioaddr +
- UART_IER);
- }
- }
- }
- }
-}
-
-static int mxser_activate(struct tty_port *port, struct tty_struct *tty)
-{
- struct mxser_port *info = container_of(port, struct mxser_port, port);
- unsigned long page;
- unsigned long flags;
-
- page = __get_free_page(GFP_KERNEL);
- if (!page)
- return -ENOMEM;
-
- spin_lock_irqsave(&info->slock, flags);
-
- if (!info->ioaddr || !info->type) {
- set_bit(TTY_IO_ERROR, &tty->flags);
- free_page(page);
- spin_unlock_irqrestore(&info->slock, flags);
- return 0;
- }
- info->port.xmit_buf = (unsigned char *) page;
-
- /*
- * Clear the FIFO buffers and disable them
- * (they will be reenabled in mxser_change_speed())
- */
- if (info->board->chip_flag)
- outb((UART_FCR_CLEAR_RCVR |
- UART_FCR_CLEAR_XMIT |
- MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
- else
- outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
- info->ioaddr + UART_FCR);
-
- /*
- * At this point there's no way the LSR could still be 0xFF;
- * if it is, then bail out, because there's likely no UART
- * here.
- */
- if (inb(info->ioaddr + UART_LSR) == 0xff) {
- spin_unlock_irqrestore(&info->slock, flags);
- if (capable(CAP_SYS_ADMIN)) {
- set_bit(TTY_IO_ERROR, &tty->flags);
- return 0;
- } else
- return -ENODEV;
- }
-
- /*
- * Clear the interrupt registers.
- */
- (void) inb(info->ioaddr + UART_LSR);
- (void) inb(info->ioaddr + UART_RX);
- (void) inb(info->ioaddr + UART_IIR);
- (void) inb(info->ioaddr + UART_MSR);
-
- /*
- * Now, initialize the UART
- */
- outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
- info->MCR = UART_MCR_DTR | UART_MCR_RTS;
- outb(info->MCR, info->ioaddr + UART_MCR);
-
- /*
- * Finally, enable interrupts
- */
- info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
-
- if (info->board->chip_flag)
- info->IER |= MOXA_MUST_IER_EGDAI;
- outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
-
- /*
- * And clear the interrupt registers again for luck.
- */
- (void) inb(info->ioaddr + UART_LSR);
- (void) inb(info->ioaddr + UART_RX);
- (void) inb(info->ioaddr + UART_IIR);
- (void) inb(info->ioaddr + UART_MSR);
-
- clear_bit(TTY_IO_ERROR, &tty->flags);
- info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
-
- /*
- * and set the speed of the serial port
- */
- mxser_change_speed(tty, NULL);
- spin_unlock_irqrestore(&info->slock, flags);
-
- return 0;
-}
-
-/*
- * This routine will shutdown a serial port
- */
-static void mxser_shutdown_port(struct tty_port *port)
-{
- struct mxser_port *info = container_of(port, struct mxser_port, port);
- unsigned long flags;
-
- spin_lock_irqsave(&info->slock, flags);
-
- /*
- * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
- * here so the queue might never be waken up
- */
- wake_up_interruptible(&info->port.delta_msr_wait);
-
- /*
- * Free the xmit buffer, if necessary
- */
- if (info->port.xmit_buf) {
- free_page((unsigned long) info->port.xmit_buf);
- info->port.xmit_buf = NULL;
- }
-
- info->IER = 0;
- outb(0x00, info->ioaddr + UART_IER);
-
- /* clear Rx/Tx FIFO's */
- if (info->board->chip_flag)
- outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
- MOXA_MUST_FCR_GDA_MODE_ENABLE,
- info->ioaddr + UART_FCR);
- else
- outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
- info->ioaddr + UART_FCR);
-
- /* read data port to reset things */
- (void) inb(info->ioaddr + UART_RX);
-
-
- if (info->board->chip_flag)
- SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
-
- spin_unlock_irqrestore(&info->slock, flags);
-}
-
-/*
- * This routine is called whenever a serial port is opened. It
- * enables interrupts for a serial port, linking in its async structure into
- * the IRQ chain. It also performs the serial-specific
- * initialization for the tty structure.
- */
-static int mxser_open(struct tty_struct *tty, struct file *filp)
-{
- struct mxser_port *info;
- int line;
-
- line = tty->index;
- if (line == MXSER_PORTS)
- return 0;
- 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;
- return tty_port_open(&info->port, tty, filp);
-}
-
-static void mxser_flush_buffer(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
- char fcr;
- unsigned long flags;
-
-
- spin_lock_irqsave(&info->slock, flags);
- info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
-
- fcr = inb(info->ioaddr + UART_FCR);
- outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
- info->ioaddr + UART_FCR);
- outb(fcr, info->ioaddr + UART_FCR);
-
- spin_unlock_irqrestore(&info->slock, flags);
-
- tty_wakeup(tty);
-}
-
-
-static void mxser_close_port(struct tty_port *port)
-{
- struct mxser_port *info = container_of(port, struct mxser_port, port);
- unsigned long timeout;
- /*
- * At this point we stop accepting input. To do this, we
- * disable the receive line status interrupts, and tell the
- * interrupt driver to stop checking the data ready bit in the
- * line status register.
- */
- info->IER &= ~UART_IER_RLSI;
- if (info->board->chip_flag)
- info->IER &= ~MOXA_MUST_RECV_ISR;
-
- outb(info->IER, info->ioaddr + UART_IER);
- /*
- * Before we drop DTR, make sure the UART transmitter
- * has completely drained; this is especially
- * important if there is a transmit FIFO!
- */
- timeout = jiffies + HZ;
- while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
- schedule_timeout_interruptible(5);
- if (time_after(jiffies, timeout))
- break;
- }
-}
-
-/*
- * This routine is called when the serial port gets closed. First, we
- * wait for the last remaining data to be sent. Then, we unlink its
- * async structure from the interrupt chain if necessary, and we free
- * that IRQ if nothing is left in the chain.
- */
-static void mxser_close(struct tty_struct *tty, struct file *filp)
-{
- struct mxser_port *info = tty->driver_data;
- struct tty_port *port = &info->port;
-
- if (tty->index == MXSER_PORTS || info == NULL)
- return;
- if (tty_port_close_start(port, tty, filp) == 0)
- return;
- mutex_lock(&port->mutex);
- mxser_close_port(port);
- mxser_flush_buffer(tty);
- mxser_shutdown_port(port);
- clear_bit(ASYNCB_INITIALIZED, &port->flags);
- mutex_unlock(&port->mutex);
- /* Right now the tty_port set is done outside of the close_end helper
- as we don't yet have everyone using refcounts */
- tty_port_close_end(port, tty);
- tty_port_tty_set(port, NULL);
-}
-
-static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
-{
- int c, total = 0;
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
-
- if (!info->port.xmit_buf)
- return 0;
-
- while (1) {
- c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
- SERIAL_XMIT_SIZE - info->xmit_head));
- if (c <= 0)
- break;
-
- memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
- spin_lock_irqsave(&info->slock, flags);
- info->xmit_head = (info->xmit_head + c) &
- (SERIAL_XMIT_SIZE - 1);
- info->xmit_cnt += c;
- spin_unlock_irqrestore(&info->slock, flags);
-
- buf += c;
- count -= c;
- total += c;
- }
-
- if (info->xmit_cnt && !tty->stopped) {
- if (!tty->hw_stopped ||
- (info->type == PORT_16550A) ||
- (info->board->chip_flag)) {
- spin_lock_irqsave(&info->slock, flags);
- outb(info->IER & ~UART_IER_THRI, info->ioaddr +
- UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
- spin_unlock_irqrestore(&info->slock, flags);
- }
- }
- return total;
-}
-
-static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
-
- if (!info->port.xmit_buf)
- return 0;
-
- if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
- return 0;
-
- spin_lock_irqsave(&info->slock, flags);
- info->port.xmit_buf[info->xmit_head++] = ch;
- info->xmit_head &= SERIAL_XMIT_SIZE - 1;
- info->xmit_cnt++;
- spin_unlock_irqrestore(&info->slock, flags);
- if (!tty->stopped) {
- if (!tty->hw_stopped ||
- (info->type == PORT_16550A) ||
- info->board->chip_flag) {
- spin_lock_irqsave(&info->slock, flags);
- outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
- spin_unlock_irqrestore(&info->slock, flags);
- }
- }
- return 1;
-}
-
-
-static void mxser_flush_chars(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
-
- if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf ||
- (tty->hw_stopped && info->type != PORT_16550A &&
- !info->board->chip_flag))
- return;
-
- spin_lock_irqsave(&info->slock, flags);
-
- outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
-
- spin_unlock_irqrestore(&info->slock, flags);
-}
-
-static int mxser_write_room(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
- int ret;
-
- ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
- return ret < 0 ? 0 : ret;
-}
-
-static int mxser_chars_in_buffer(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
- return info->xmit_cnt;
-}
-
-/*
- * ------------------------------------------------------------
- * friends of mxser_ioctl()
- * ------------------------------------------------------------
- */
-static int mxser_get_serial_info(struct tty_struct *tty,
- struct serial_struct __user *retinfo)
-{
- struct mxser_port *info = tty->driver_data;
- struct serial_struct tmp = {
- .type = info->type,
- .line = tty->index,
- .port = info->ioaddr,
- .irq = info->board->irq,
- .flags = info->port.flags,
- .baud_base = info->baud_base,
- .close_delay = info->port.close_delay,
- .closing_wait = info->port.closing_wait,
- .custom_divisor = info->custom_divisor,
- .hub6 = 0
- };
- if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
- return -EFAULT;
- return 0;
-}
-
-static int mxser_set_serial_info(struct tty_struct *tty,
- struct serial_struct __user *new_info)
-{
- struct mxser_port *info = tty->driver_data;
- struct tty_port *port = &info->port;
- struct serial_struct new_serial;
- speed_t baud;
- unsigned long sl_flags;
- unsigned int flags;
- int retval = 0;
-
- if (!new_info || !info->ioaddr)
- return -ENODEV;
- if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
- return -EFAULT;
-
- if (new_serial.irq != info->board->irq ||
- new_serial.port != info->ioaddr)
- return -EINVAL;
-
- flags = port->flags & ASYNC_SPD_MASK;
-
- if (!capable(CAP_SYS_ADMIN)) {
- if ((new_serial.baud_base != info->baud_base) ||
- (new_serial.close_delay != info->port.close_delay) ||
- ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK)))
- return -EPERM;
- info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
- (new_serial.flags & ASYNC_USR_MASK));
- } else {
- /*
- * OK, past this point, all the error checking has been done.
- * At this point, we start making changes.....
- */
- port->flags = ((port->flags & ~ASYNC_FLAGS) |
- (new_serial.flags & ASYNC_FLAGS));
- port->close_delay = new_serial.close_delay * HZ / 100;
- port->closing_wait = new_serial.closing_wait * HZ / 100;
- tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
- if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
- (new_serial.baud_base != info->baud_base ||
- new_serial.custom_divisor !=
- info->custom_divisor)) {
- if (new_serial.custom_divisor == 0)
- return -EINVAL;
- baud = new_serial.baud_base / new_serial.custom_divisor;
- tty_encode_baud_rate(tty, baud, baud);
- }
- }
-
- info->type = new_serial.type;
-
- process_txrx_fifo(info);
-
- if (test_bit(ASYNCB_INITIALIZED, &port->flags)) {
- if (flags != (port->flags & ASYNC_SPD_MASK)) {
- spin_lock_irqsave(&info->slock, sl_flags);
- mxser_change_speed(tty, NULL);
- spin_unlock_irqrestore(&info->slock, sl_flags);
- }
- } else {
- retval = mxser_activate(port, tty);
- if (retval == 0)
- set_bit(ASYNCB_INITIALIZED, &port->flags);
- }
- return retval;
-}
-
-/*
- * mxser_get_lsr_info - get line status register info
- *
- * Purpose: Let user call ioctl() to get info when the UART physically
- * is emptied. On bus types like RS485, the transmitter must
- * release the bus after transmitting. This must be done when
- * the transmit shift register is empty, not be done when the
- * transmit holding register is empty. This functionality
- * allows an RS485 driver to be written in user space.
- */
-static int mxser_get_lsr_info(struct mxser_port *info,
- unsigned int __user *value)
-{
- unsigned char status;
- unsigned int result;
- unsigned long flags;
-
- spin_lock_irqsave(&info->slock, flags);
- status = inb(info->ioaddr + UART_LSR);
- spin_unlock_irqrestore(&info->slock, flags);
- result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
- return put_user(result, value);
-}
-
-static int mxser_tiocmget(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned char control, status;
- unsigned long flags;
-
-
- if (tty->index == MXSER_PORTS)
- return -ENOIOCTLCMD;
- if (test_bit(TTY_IO_ERROR, &tty->flags))
- return -EIO;
-
- control = info->MCR;
-
- spin_lock_irqsave(&info->slock, flags);
- status = inb(info->ioaddr + UART_MSR);
- if (status & UART_MSR_ANY_DELTA)
- mxser_check_modem_status(tty, info, status);
- spin_unlock_irqrestore(&info->slock, flags);
- return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
- ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
- ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
- ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
- ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
- ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
-}
-
-static int mxser_tiocmset(struct tty_struct *tty,
- unsigned int set, unsigned int clear)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
-
-
- if (tty->index == MXSER_PORTS)
- return -ENOIOCTLCMD;
- if (test_bit(TTY_IO_ERROR, &tty->flags))
- return -EIO;
-
- spin_lock_irqsave(&info->slock, flags);
-
- if (set & TIOCM_RTS)
- info->MCR |= UART_MCR_RTS;
- if (set & TIOCM_DTR)
- info->MCR |= UART_MCR_DTR;
-
- if (clear & TIOCM_RTS)
- info->MCR &= ~UART_MCR_RTS;
- if (clear & TIOCM_DTR)
- info->MCR &= ~UART_MCR_DTR;
-
- outb(info->MCR, info->ioaddr + UART_MCR);
- spin_unlock_irqrestore(&info->slock, flags);
- return 0;
-}
-
-static int __init mxser_program_mode(int port)
-{
- int id, i, j, n;
-
- outb(0, port);
- outb(0, port);
- outb(0, port);
- (void)inb(port);
- (void)inb(port);
- outb(0, port);
- (void)inb(port);
-
- id = inb(port + 1) & 0x1F;
- if ((id != C168_ASIC_ID) &&
- (id != C104_ASIC_ID) &&
- (id != C102_ASIC_ID) &&
- (id != CI132_ASIC_ID) &&
- (id != CI134_ASIC_ID) &&
- (id != CI104J_ASIC_ID))
- return -1;
- for (i = 0, j = 0; i < 4; i++) {
- n = inb(port + 2);
- if (n == 'M') {
- j = 1;
- } else if ((j == 1) && (n == 1)) {
- j = 2;
- break;
- } else
- j = 0;
- }
- if (j != 2)
- id = -2;
- return id;
-}
-
-static void __init mxser_normal_mode(int port)
-{
- int i, n;
-
- outb(0xA5, port + 1);
- outb(0x80, port + 3);
- outb(12, port + 0); /* 9600 bps */
- outb(0, port + 1);
- outb(0x03, port + 3); /* 8 data bits */
- outb(0x13, port + 4); /* loop back mode */
- for (i = 0; i < 16; i++) {
- n = inb(port + 5);
- if ((n & 0x61) == 0x60)
- break;
- if ((n & 1) == 1)
- (void)inb(port);
- }
- outb(0x00, port + 4);
-}
-
-#define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
-#define CHIP_DO 0x02 /* Serial Data Output in Eprom */
-#define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
-#define CHIP_DI 0x08 /* Serial Data Input in Eprom */
-#define EN_CCMD 0x000 /* Chip's command register */
-#define EN0_RSARLO 0x008 /* Remote start address reg 0 */
-#define EN0_RSARHI 0x009 /* Remote start address reg 1 */
-#define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
-#define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
-#define EN0_DCFG 0x00E /* Data configuration reg WR */
-#define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
-#define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
-#define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
-static int __init mxser_read_register(int port, unsigned short *regs)
-{
- int i, k, value, id;
- unsigned int j;
-
- id = mxser_program_mode(port);
- if (id < 0)
- return id;
- for (i = 0; i < 14; i++) {
- k = (i & 0x3F) | 0x180;
- for (j = 0x100; j > 0; j >>= 1) {
- outb(CHIP_CS, port);
- if (k & j) {
- outb(CHIP_CS | CHIP_DO, port);
- outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
- } else {
- outb(CHIP_CS, port);
- outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
- }
- }
- (void)inb(port);
- value = 0;
- for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
- outb(CHIP_CS, port);
- outb(CHIP_CS | CHIP_SK, port);
- if (inb(port) & CHIP_DI)
- value |= j;
- }
- regs[i] = value;
- outb(0, port);
- }
- mxser_normal_mode(port);
- return id;
-}
-
-static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
-{
- struct mxser_port *ip;
- struct tty_port *port;
- struct tty_struct *tty;
- int result, status;
- unsigned int i, j;
- int ret = 0;
-
- switch (cmd) {
- case MOXA_GET_MAJOR:
- if (printk_ratelimit())
- printk(KERN_WARNING "mxser: '%s' uses deprecated ioctl "
- "%x (GET_MAJOR), fix your userspace\n",
- current->comm, cmd);
- return put_user(ttymajor, (int __user *)argp);
-
- case MOXA_CHKPORTENABLE:
- result = 0;
- for (i = 0; i < MXSER_BOARDS; i++)
- for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
- if (mxser_boards[i].ports[j].ioaddr)
- result |= (1 << i);
- return put_user(result, (unsigned long __user *)argp);
- case MOXA_GETDATACOUNT:
- /* The receive side is locked by port->slock but it isn't
- clear that an exact snapshot is worth copying here */
- if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
- ret = -EFAULT;
- return ret;
- case MOXA_GETMSTATUS: {
- struct mxser_mstatus ms, __user *msu = argp;
- for (i = 0; i < MXSER_BOARDS; i++)
- for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
- ip = &mxser_boards[i].ports[j];
- port = &ip->port;
- memset(&ms, 0, sizeof(ms));
-
- mutex_lock(&port->mutex);
- if (!ip->ioaddr)
- goto copy;
-
- tty = tty_port_tty_get(port);
-
- if (!tty || !tty->termios)
- ms.cflag = ip->normal_termios.c_cflag;
- else
- ms.cflag = tty->termios->c_cflag;
- tty_kref_put(tty);
- spin_lock_irq(&ip->slock);
- status = inb(ip->ioaddr + UART_MSR);
- spin_unlock_irq(&ip->slock);
- if (status & UART_MSR_DCD)
- ms.dcd = 1;
- if (status & UART_MSR_DSR)
- ms.dsr = 1;
- if (status & UART_MSR_CTS)
- ms.cts = 1;
- copy:
- mutex_unlock(&port->mutex);
- if (copy_to_user(msu, &ms, sizeof(ms)))
- return -EFAULT;
- msu++;
- }
- return 0;
- }
- case MOXA_ASPP_MON_EXT: {
- struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */
- unsigned int cflag, iflag, p;
- u8 opmode;
-
- me = kzalloc(sizeof(*me), GFP_KERNEL);
- if (!me)
- return -ENOMEM;
-
- for (i = 0, p = 0; i < MXSER_BOARDS; i++) {
- for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) {
- if (p >= ARRAY_SIZE(me->rx_cnt)) {
- i = MXSER_BOARDS;
- break;
- }
- ip = &mxser_boards[i].ports[j];
- port = &ip->port;
-
- mutex_lock(&port->mutex);
- if (!ip->ioaddr) {
- mutex_unlock(&port->mutex);
- continue;
- }
-
- spin_lock_irq(&ip->slock);
- status = mxser_get_msr(ip->ioaddr, 0, p);
-
- if (status & UART_MSR_TERI)
- ip->icount.rng++;
- if (status & UART_MSR_DDSR)
- ip->icount.dsr++;
- if (status & UART_MSR_DDCD)
- ip->icount.dcd++;
- if (status & UART_MSR_DCTS)
- ip->icount.cts++;
-
- ip->mon_data.modem_status = status;
- me->rx_cnt[p] = ip->mon_data.rxcnt;
- me->tx_cnt[p] = ip->mon_data.txcnt;
- me->up_rxcnt[p] = ip->mon_data.up_rxcnt;
- me->up_txcnt[p] = ip->mon_data.up_txcnt;
- me->modem_status[p] =
- ip->mon_data.modem_status;
- spin_unlock_irq(&ip->slock);
-
- tty = tty_port_tty_get(&ip->port);
-
- if (!tty || !tty->termios) {
- cflag = ip->normal_termios.c_cflag;
- iflag = ip->normal_termios.c_iflag;
- me->baudrate[p] = tty_termios_baud_rate(&ip->normal_termios);
- } else {
- cflag = tty->termios->c_cflag;
- iflag = tty->termios->c_iflag;
- me->baudrate[p] = tty_get_baud_rate(tty);
- }
- tty_kref_put(tty);
-
- me->databits[p] = cflag & CSIZE;
- me->stopbits[p] = cflag & CSTOPB;
- me->parity[p] = cflag & (PARENB | PARODD |
- CMSPAR);
-
- if (cflag & CRTSCTS)
- me->flowctrl[p] |= 0x03;
-
- if (iflag & (IXON | IXOFF))
- me->flowctrl[p] |= 0x0C;
-
- if (ip->type == PORT_16550A)
- me->fifo[p] = 1;
-
- opmode = inb(ip->opmode_ioaddr)>>((p % 4) * 2);
- opmode &= OP_MODE_MASK;
- me->iftype[p] = opmode;
- mutex_unlock(&port->mutex);
- }
- }
- if (copy_to_user(argp, me, sizeof(*me)))
- ret = -EFAULT;
- kfree(me);
- return ret;
- }
- default:
- return -ENOIOCTLCMD;
- }
- return 0;
-}
-
-static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
- struct async_icount *cprev)
-{
- struct async_icount cnow;
- unsigned long flags;
- int ret;
-
- spin_lock_irqsave(&info->slock, flags);
- cnow = info->icount; /* atomic copy */
- spin_unlock_irqrestore(&info->slock, flags);
-
- ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
- ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
- ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
- ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
-
- *cprev = cnow;
-
- return ret;
-}
-
-static int mxser_ioctl(struct tty_struct *tty,
- unsigned int cmd, unsigned long arg)
-{
- struct mxser_port *info = tty->driver_data;
- struct tty_port *port = &info->port;
- struct async_icount cnow;
- unsigned long flags;
- void __user *argp = (void __user *)arg;
- int retval;
-
- if (tty->index == MXSER_PORTS)
- return mxser_ioctl_special(cmd, argp);
-
- if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
- int p;
- unsigned long opmode;
- static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
- int shiftbit;
- unsigned char val, mask;
-
- p = tty->index % 4;
- if (cmd == MOXA_SET_OP_MODE) {
- if (get_user(opmode, (int __user *) argp))
- return -EFAULT;
- if (opmode != RS232_MODE &&
- opmode != RS485_2WIRE_MODE &&
- opmode != RS422_MODE &&
- opmode != RS485_4WIRE_MODE)
- return -EFAULT;
- mask = ModeMask[p];
- shiftbit = p * 2;
- spin_lock_irq(&info->slock);
- val = inb(info->opmode_ioaddr);
- val &= mask;
- val |= (opmode << shiftbit);
- outb(val, info->opmode_ioaddr);
- spin_unlock_irq(&info->slock);
- } else {
- shiftbit = p * 2;
- spin_lock_irq(&info->slock);
- opmode = inb(info->opmode_ioaddr) >> shiftbit;
- spin_unlock_irq(&info->slock);
- opmode &= OP_MODE_MASK;
- if (put_user(opmode, (int __user *)argp))
- return -EFAULT;
- }
- return 0;
- }
-
- if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT &&
- test_bit(TTY_IO_ERROR, &tty->flags))
- return -EIO;
-
- switch (cmd) {
- case TIOCGSERIAL:
- mutex_lock(&port->mutex);
- retval = mxser_get_serial_info(tty, argp);
- mutex_unlock(&port->mutex);
- return retval;
- case TIOCSSERIAL:
- mutex_lock(&port->mutex);
- retval = mxser_set_serial_info(tty, argp);
- mutex_unlock(&port->mutex);
- return retval;
- case TIOCSERGETLSR: /* Get line status register */
- return mxser_get_lsr_info(info, argp);
- /*
- * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
- * - mask passed in arg for lines of interest
- * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
- * Caller should use TIOCGICOUNT to see which one it was
- */
- case TIOCMIWAIT:
- spin_lock_irqsave(&info->slock, flags);
- cnow = info->icount; /* note the counters on entry */
- spin_unlock_irqrestore(&info->slock, flags);
-
- return wait_event_interruptible(info->port.delta_msr_wait,
- mxser_cflags_changed(info, arg, &cnow));
- case MOXA_HighSpeedOn:
- return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
- case MOXA_SDS_RSTICOUNTER:
- spin_lock_irq(&info->slock);
- info->mon_data.rxcnt = 0;
- info->mon_data.txcnt = 0;
- spin_unlock_irq(&info->slock);
- return 0;
-
- case MOXA_ASPP_OQUEUE:{
- int len, lsr;
-
- len = mxser_chars_in_buffer(tty);
- spin_lock_irq(&info->slock);
- lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_THRE;
- spin_unlock_irq(&info->slock);
- len += (lsr ? 0 : 1);
-
- return put_user(len, (int __user *)argp);
- }
- case MOXA_ASPP_MON: {
- int mcr, status;
-
- spin_lock_irq(&info->slock);
- status = mxser_get_msr(info->ioaddr, 1, tty->index);
- mxser_check_modem_status(tty, info, status);
-
- mcr = inb(info->ioaddr + UART_MCR);
- spin_unlock_irq(&info->slock);
-
- if (mcr & MOXA_MUST_MCR_XON_FLAG)
- info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
- else
- info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
-
- if (mcr & MOXA_MUST_MCR_TX_XON)
- info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
- else
- info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
-
- if (tty->hw_stopped)
- info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
- else
- info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
-
- if (copy_to_user(argp, &info->mon_data,
- sizeof(struct mxser_mon)))
- return -EFAULT;
-
- return 0;
- }
- case MOXA_ASPP_LSTATUS: {
- if (put_user(info->err_shadow, (unsigned char __user *)argp))
- return -EFAULT;
-
- info->err_shadow = 0;
- return 0;
- }
- case MOXA_SET_BAUD_METHOD: {
- int method;
-
- if (get_user(method, (int __user *)argp))
- return -EFAULT;
- mxser_set_baud_method[tty->index] = method;
- return put_user(method, (int __user *)argp);
- }
- default:
- return -ENOIOCTLCMD;
- }
- return 0;
-}
-
- /*
- * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
- * Return: write counters to the user passed counter struct
- * NB: both 1->0 and 0->1 transitions are counted except for
- * RI where only 0->1 is counted.
- */
-
-static int mxser_get_icount(struct tty_struct *tty,
- struct serial_icounter_struct *icount)
-
-{
- struct mxser_port *info = tty->driver_data;
- struct async_icount cnow;
- unsigned long flags;
-
- spin_lock_irqsave(&info->slock, flags);
- cnow = info->icount;
- spin_unlock_irqrestore(&info->slock, flags);
-
- icount->frame = cnow.frame;
- icount->brk = cnow.brk;
- icount->overrun = cnow.overrun;
- icount->buf_overrun = cnow.buf_overrun;
- icount->parity = cnow.parity;
- icount->rx = cnow.rx;
- icount->tx = cnow.tx;
- icount->cts = cnow.cts;
- icount->dsr = cnow.dsr;
- icount->rng = cnow.rng;
- icount->dcd = cnow.dcd;
- return 0;
-}
-
-static void mxser_stoprx(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
-
- info->ldisc_stop_rx = 1;
- if (I_IXOFF(tty)) {
- if (info->board->chip_flag) {
- info->IER &= ~MOXA_MUST_RECV_ISR;
- outb(info->IER, info->ioaddr + UART_IER);
- } else {
- info->x_char = STOP_CHAR(tty);
- outb(0, info->ioaddr + UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
- }
- }
-
- if (tty->termios->c_cflag & CRTSCTS) {
- info->MCR &= ~UART_MCR_RTS;
- outb(info->MCR, info->ioaddr + UART_MCR);
- }
-}
-
-/*
- * This routine is called by the upper-layer tty layer to signal that
- * incoming characters should be throttled.
- */
-static void mxser_throttle(struct tty_struct *tty)
-{
- mxser_stoprx(tty);
-}
-
-static void mxser_unthrottle(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
-
- /* startrx */
- info->ldisc_stop_rx = 0;
- if (I_IXOFF(tty)) {
- if (info->x_char)
- info->x_char = 0;
- else {
- if (info->board->chip_flag) {
- info->IER |= MOXA_MUST_RECV_ISR;
- outb(info->IER, info->ioaddr + UART_IER);
- } else {
- info->x_char = START_CHAR(tty);
- outb(0, info->ioaddr + UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
- }
- }
- }
-
- if (tty->termios->c_cflag & CRTSCTS) {
- info->MCR |= UART_MCR_RTS;
- outb(info->MCR, info->ioaddr + UART_MCR);
- }
-}
-
-/*
- * mxser_stop() and mxser_start()
- *
- * This routines are called before setting or resetting tty->stopped.
- * They enable or disable transmitter interrupts, as necessary.
- */
-static void mxser_stop(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
-
- spin_lock_irqsave(&info->slock, flags);
- if (info->IER & UART_IER_THRI) {
- info->IER &= ~UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
- }
- spin_unlock_irqrestore(&info->slock, flags);
-}
-
-static void mxser_start(struct tty_struct *tty)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
-
- spin_lock_irqsave(&info->slock, flags);
- if (info->xmit_cnt && info->port.xmit_buf) {
- outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
- info->IER |= UART_IER_THRI;
- outb(info->IER, info->ioaddr + UART_IER);
- }
- spin_unlock_irqrestore(&info->slock, flags);
-}
-
-static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
-
- spin_lock_irqsave(&info->slock, flags);
- mxser_change_speed(tty, old_termios);
- spin_unlock_irqrestore(&info->slock, flags);
-
- if ((old_termios->c_cflag & CRTSCTS) &&
- !(tty->termios->c_cflag & CRTSCTS)) {
- tty->hw_stopped = 0;
- mxser_start(tty);
- }
-
- /* Handle sw stopped */
- if ((old_termios->c_iflag & IXON) &&
- !(tty->termios->c_iflag & IXON)) {
- tty->stopped = 0;
-
- if (info->board->chip_flag) {
- spin_lock_irqsave(&info->slock, flags);
- mxser_disable_must_rx_software_flow_control(
- info->ioaddr);
- spin_unlock_irqrestore(&info->slock, flags);
- }
-
- mxser_start(tty);
- }
-}
-
-/*
- * mxser_wait_until_sent() --- wait until the transmitter is empty
- */
-static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long orig_jiffies, char_time;
- unsigned long flags;
- int lsr;
-
- if (info->type == PORT_UNKNOWN)
- return;
-
- if (info->xmit_fifo_size == 0)
- return; /* Just in case.... */
-
- orig_jiffies = jiffies;
- /*
- * Set the check interval to be 1/5 of the estimated time to
- * send a single character, and make it at least 1. The check
- * interval should also be less than the timeout.
- *
- * Note: we have to use pretty tight timings here to satisfy
- * the NIST-PCTS.
- */
- char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
- char_time = char_time / 5;
- if (char_time == 0)
- char_time = 1;
- if (timeout && timeout < char_time)
- char_time = timeout;
- /*
- * If the transmitter hasn't cleared in twice the approximate
- * amount of time to send the entire FIFO, it probably won't
- * ever clear. This assumes the UART isn't doing flow
- * control, which is currently the case. Hence, if it ever
- * takes longer than info->timeout, this is probably due to a
- * UART bug of some kind. So, we clamp the timeout parameter at
- * 2*info->timeout.
- */
- if (!timeout || timeout > 2 * info->timeout)
- timeout = 2 * info->timeout;
-#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
- spin_lock_irqsave(&info->slock, flags);
- 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
- spin_unlock_irqrestore(&info->slock, flags);
- schedule_timeout_interruptible(char_time);
- spin_lock_irqsave(&info->slock, flags);
- if (signal_pending(current))
- break;
- if (timeout && time_after(jiffies, orig_jiffies + timeout))
- break;
- }
- spin_unlock_irqrestore(&info->slock, flags);
- set_current_state(TASK_RUNNING);
-
-#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);
- tty_port_hangup(&info->port);
-}
-
-/*
- * mxser_rs_break() --- routine which turns the break handling on or off
- */
-static int mxser_rs_break(struct tty_struct *tty, int break_state)
-{
- struct mxser_port *info = tty->driver_data;
- unsigned long flags;
-
- spin_lock_irqsave(&info->slock, flags);
- if (break_state == -1)
- outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
- info->ioaddr + UART_LCR);
- else
- outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
- info->ioaddr + UART_LCR);
- spin_unlock_irqrestore(&info->slock, flags);
- return 0;
-}
-
-static void mxser_receive_chars(struct tty_struct *tty,
- struct mxser_port *port, int *status)
-{
- unsigned char ch, gdl;
- int ignored = 0;
- int cnt = 0;
- int recv_room;
- int max = 256;
-
- recv_room = tty->receive_room;
- if (recv_room == 0 && !port->ldisc_stop_rx)
- mxser_stoprx(tty);
- if (port->board->chip_flag != MOXA_OTHER_UART) {
-
- if (*status & UART_LSR_SPECIAL)
- goto intr_old;
- if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
- (*status & MOXA_MUST_LSR_RERR))
- goto intr_old;
- if (*status & MOXA_MUST_LSR_RERR)
- goto intr_old;
-
- gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
-
- if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
- gdl &= MOXA_MUST_GDL_MASK;
- if (gdl >= recv_room) {
- if (!port->ldisc_stop_rx)
- mxser_stoprx(tty);
- }
- while (gdl--) {
- ch = inb(port->ioaddr + UART_RX);
- tty_insert_flip_char(tty, ch, 0);
- cnt++;
- }
- goto end_intr;
- }
-intr_old:
-
- do {
- if (max-- < 0)
- break;
-
- ch = inb(port->ioaddr + UART_RX);
- if (port->board->chip_flag && (*status & UART_LSR_OE))
- outb(0x23, port->ioaddr + UART_FCR);
- *status &= port->read_status_mask;
- if (*status & port->ignore_status_mask) {
- if (++ignored > 100)
- break;
- } else {
- char flag = 0;
- if (*status & UART_LSR_SPECIAL) {
- if (*status & UART_LSR_BI) {
- flag = TTY_BREAK;
- port->icount.brk++;
-
- if (port->port.flags & ASYNC_SAK)
- do_SAK(tty);
- } else if (*status & UART_LSR_PE) {
- flag = TTY_PARITY;
- port->icount.parity++;
- } else if (*status & UART_LSR_FE) {
- flag = TTY_FRAME;
- port->icount.frame++;
- } else if (*status & UART_LSR_OE) {
- flag = TTY_OVERRUN;
- port->icount.overrun++;
- } else
- flag = TTY_BREAK;
- }
- tty_insert_flip_char(tty, ch, flag);
- cnt++;
- if (cnt >= recv_room) {
- if (!port->ldisc_stop_rx)
- mxser_stoprx(tty);
- break;
- }
-
- }
-
- if (port->board->chip_flag)
- break;
-
- *status = inb(port->ioaddr + UART_LSR);
- } while (*status & UART_LSR_DR);
-
-end_intr:
- mxvar_log.rxcnt[tty->index] += cnt;
- port->mon_data.rxcnt += cnt;
- port->mon_data.up_rxcnt += cnt;
-
- /*
- * We are called from an interrupt context with &port->slock
- * being held. Drop it temporarily in order to prevent
- * recursive locking.
- */
- spin_unlock(&port->slock);
- tty_flip_buffer_push(tty);
- spin_lock(&port->slock);
-}
-
-static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port)
-{
- int count, cnt;
-
- if (port->x_char) {
- outb(port->x_char, port->ioaddr + UART_TX);
- port->x_char = 0;
- mxvar_log.txcnt[tty->index]++;
- port->mon_data.txcnt++;
- port->mon_data.up_txcnt++;
- port->icount.tx++;
- return;
- }
-
- if (port->port.xmit_buf == NULL)
- return;
-
- if (port->xmit_cnt <= 0 || tty->stopped ||
- (tty->hw_stopped &&
- (port->type != PORT_16550A) &&
- (!port->board->chip_flag))) {
- port->IER &= ~UART_IER_THRI;
- outb(port->IER, port->ioaddr + UART_IER);
- return;
- }
-
- cnt = port->xmit_cnt;
- count = port->xmit_fifo_size;
- do {
- outb(port->port.xmit_buf[port->xmit_tail++],
- port->ioaddr + UART_TX);
- port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
- if (--port->xmit_cnt <= 0)
- break;
- } while (--count > 0);
- mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt);
-
- port->mon_data.txcnt += (cnt - port->xmit_cnt);
- port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
- port->icount.tx += (cnt - port->xmit_cnt);
-
- if (port->xmit_cnt < WAKEUP_CHARS)
- tty_wakeup(tty);
-
- if (port->xmit_cnt <= 0) {
- port->IER &= ~UART_IER_THRI;
- outb(port->IER, port->ioaddr + UART_IER);
- }
-}
-
-/*
- * This is the serial driver's generic interrupt routine
- */
-static irqreturn_t mxser_interrupt(int irq, void *dev_id)
-{
- int status, iir, i;
- struct mxser_board *brd = NULL;
- struct mxser_port *port;
- int max, irqbits, bits, msr;
- unsigned int int_cnt, pass_counter = 0;
- int handled = IRQ_NONE;
- struct tty_struct *tty;
-
- for (i = 0; i < MXSER_BOARDS; i++)
- if (dev_id == &mxser_boards[i]) {
- brd = dev_id;
- break;
- }
-
- if (i == MXSER_BOARDS)
- goto irq_stop;
- if (brd == NULL)
- goto irq_stop;
- max = brd->info->nports;
- while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
- irqbits = inb(brd->vector) & brd->vector_mask;
- if (irqbits == brd->vector_mask)
- break;
-
- handled = IRQ_HANDLED;
- for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
- if (irqbits == brd->vector_mask)
- break;
- if (bits & irqbits)
- continue;
- port = &brd->ports[i];
-
- int_cnt = 0;
- spin_lock(&port->slock);
- do {
- iir = inb(port->ioaddr + UART_IIR);
- if (iir & UART_IIR_NO_INT)
- break;
- iir &= MOXA_MUST_IIR_MASK;
- tty = tty_port_tty_get(&port->port);
- if (!tty ||
- (port->port.flags & ASYNC_CLOSING) ||
- !(port->port.flags &
- ASYNC_INITIALIZED)) {
- status = inb(port->ioaddr + UART_LSR);
- outb(0x27, port->ioaddr + UART_FCR);
- inb(port->ioaddr + UART_MSR);
- tty_kref_put(tty);
- break;
- }
-
- status = inb(port->ioaddr + UART_LSR);
-
- if (status & UART_LSR_PE)
- port->err_shadow |= NPPI_NOTIFY_PARITY;
- if (status & UART_LSR_FE)
- port->err_shadow |= NPPI_NOTIFY_FRAMING;
- if (status & UART_LSR_OE)
- port->err_shadow |=
- NPPI_NOTIFY_HW_OVERRUN;
- if (status & UART_LSR_BI)
- port->err_shadow |= NPPI_NOTIFY_BREAK;
-
- if (port->board->chip_flag) {
- if (iir == MOXA_MUST_IIR_GDA ||
- iir == MOXA_MUST_IIR_RDA ||
- iir == MOXA_MUST_IIR_RTO ||
- iir == MOXA_MUST_IIR_LSR)
- mxser_receive_chars(tty, port,
- &status);
-
- } else {
- status &= port->read_status_mask;
- if (status & UART_LSR_DR)
- mxser_receive_chars(tty, port,
- &status);
- }
- msr = inb(port->ioaddr + UART_MSR);
- if (msr & UART_MSR_ANY_DELTA)
- mxser_check_modem_status(tty, port, msr);
-
- if (port->board->chip_flag) {
- if (iir == 0x02 && (status &
- UART_LSR_THRE))
- mxser_transmit_chars(tty, port);
- } else {
- if (status & UART_LSR_THRE)
- mxser_transmit_chars(tty, port);
- }
- tty_kref_put(tty);
- } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
- spin_unlock(&port->slock);
- }
- }
-
-irq_stop:
- return handled;
-}
-
-static const struct tty_operations mxser_ops = {
- .open = mxser_open,
- .close = mxser_close,
- .write = mxser_write,
- .put_char = mxser_put_char,
- .flush_chars = mxser_flush_chars,
- .write_room = mxser_write_room,
- .chars_in_buffer = mxser_chars_in_buffer,
- .flush_buffer = mxser_flush_buffer,
- .ioctl = mxser_ioctl,
- .throttle = mxser_throttle,
- .unthrottle = mxser_unthrottle,
- .set_termios = mxser_set_termios,
- .stop = mxser_stop,
- .start = mxser_start,
- .hangup = mxser_hangup,
- .break_ctl = mxser_rs_break,
- .wait_until_sent = mxser_wait_until_sent,
- .tiocmget = mxser_tiocmget,
- .tiocmset = mxser_tiocmset,
- .get_icount = mxser_get_icount,
-};
-
-struct tty_port_operations mxser_port_ops = {
- .carrier_raised = mxser_carrier_raised,
- .dtr_rts = mxser_dtr_rts,
- .activate = mxser_activate,
- .shutdown = mxser_shutdown_port,
-};
-
-/*
- * The MOXA Smartio/Industio serial driver boot-time initialization code!
- */
-
-static void mxser_release_ISA_res(struct mxser_board *brd)
-{
- free_irq(brd->irq, brd);
- 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 "mxser: max. baud rate = %d bps\n",
- brd->ports[0].max_baud);
-
- for (i = 0; i < brd->info->nports; i++) {
- info = &brd->ports[i];
- tty_port_init(&info->port);
- info->port.ops = &mxser_port_ops;
- info->board = brd;
- info->stop_rx = 0;
- info->ldisc_stop_rx = 0;
-
- /* Enhance mode enabled here */
- if (brd->chip_flag != MOXA_OTHER_UART)
- mxser_enable_must_enchance_mode(info->ioaddr);
-
- info->port.flags = ASYNC_SHARE_IRQ;
- info->type = brd->uart_type;
-
- process_txrx_fifo(info);
-
- info->custom_divisor = info->baud_base * 16;
- info->port.close_delay = 5 * HZ / 10;
- info->port.closing_wait = 30 * HZ;
- info->normal_termios = mxvar_sdriver->init_termios;
- memset(&info->mon_data, 0, sizeof(struct mxser_mon));
- info->err_shadow = 0;
- spin_lock_init(&info->slock);
-
- /* before set INT ISR, disable all int */
- outb(inb(info->ioaddr + UART_IER) & 0xf0,
- info->ioaddr + UART_IER);
- }
-
- retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
- brd);
- if (retval)
- printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
- "conflict with another device.\n",
- brd->info->name, brd->irq);
-
- return retval;
-}
-
-static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
-{
- int id, i, bits;
- unsigned short regs[16], irq;
- unsigned char scratch, scratch2;
-
- brd->chip_flag = MOXA_OTHER_UART;
-
- id = mxser_read_register(cap, regs);
- switch (id) {
- case C168_ASIC_ID:
- brd->info = &mxser_cards[0];
- break;
- case C104_ASIC_ID:
- brd->info = &mxser_cards[1];
- break;
- case CI104J_ASIC_ID:
- brd->info = &mxser_cards[2];
- break;
- case C102_ASIC_ID:
- brd->info = &mxser_cards[5];
- break;
- case CI132_ASIC_ID:
- brd->info = &mxser_cards[6];
- break;
- case CI134_ASIC_ID:
- brd->info = &mxser_cards[7];
- break;
- default:
- return 0;
- }
-
- irq = 0;
- /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
- Flag-hack checks if configuration should be read as 2-port here. */
- if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
- irq = regs[9] & 0xF000;
- irq = irq | (irq >> 4);
- if (irq != (regs[9] & 0xFF00))
- goto err_irqconflict;
- } else if (brd->info->nports == 4) {
- irq = regs[9] & 0xF000;
- irq = irq | (irq >> 4);
- irq = irq | (irq >> 8);
- if (irq != regs[9])
- goto err_irqconflict;
- } else if (brd->info->nports == 8) {
- irq = regs[9] & 0xF000;
- irq = irq | (irq >> 4);
- irq = irq | (irq >> 8);
- if ((irq != regs[9]) || (irq != regs[10]))
- goto err_irqconflict;
- }
-
- if (!irq) {
- printk(KERN_ERR "mxser: interrupt number unset\n");
- return -EIO;
- }
- brd->irq = ((int)(irq & 0xF000) >> 12);
- for (i = 0; i < 8; i++)
- brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
- if ((regs[12] & 0x80) == 0) {
- printk(KERN_ERR "mxser: invalid interrupt vector\n");
- return -EIO;
- }
- brd->vector = (int)regs[11]; /* interrupt vector */
- if (id == 1)
- brd->vector_mask = 0x00FF;
- else
- brd->vector_mask = 0x000F;
- for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
- if (regs[12] & bits) {
- brd->ports[i].baud_base = 921600;
- brd->ports[i].max_baud = 921600;
- } else {
- brd->ports[i].baud_base = 115200;
- brd->ports[i].max_baud = 115200;
- }
- }
- scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
- outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
- outb(0, cap + UART_EFR); /* EFR is the same as FCR */
- outb(scratch2, cap + UART_LCR);
- outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
- scratch = inb(cap + UART_IIR);
-
- if (scratch & 0xC0)
- brd->uart_type = PORT_16550A;
- else
- brd->uart_type = PORT_16450;
- if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
- "mxser(IO)")) {
- printk(KERN_ERR "mxser: can't request ports I/O region: "
- "0x%.8lx-0x%.8lx\n",
- brd->ports[0].ioaddr, brd->ports[0].ioaddr +
- 8 * brd->info->nports - 1);
- return -EIO;
- }
- if (!request_region(brd->vector, 1, "mxser(vector)")) {
- release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
- printk(KERN_ERR "mxser: can't request interrupt vector region: "
- "0x%.8lx-0x%.8lx\n",
- brd->ports[0].ioaddr, brd->ports[0].ioaddr +
- 8 * brd->info->nports - 1);
- return -EIO;
- }
- return brd->info->nports;
-
-err_irqconflict:
- printk(KERN_ERR "mxser: invalid interrupt number\n");
- return -EIO;
-}
-
-static int __devinit mxser_probe(struct pci_dev *pdev,
- const struct pci_device_id *ent)
-{
-#ifdef CONFIG_PCI
- struct mxser_board *brd;
- unsigned int i, j;
- unsigned long ioaddress;
- int retval = -EINVAL;
-
- for (i = 0; i < MXSER_BOARDS; i++)
- if (mxser_boards[i].info == NULL)
- break;
-
- if (i >= MXSER_BOARDS) {
- dev_err(&pdev->dev, "too many boards found (maximum %d), board "
- "not configured\n", MXSER_BOARDS);
- goto err;
- }
-
- brd = &mxser_boards[i];
- brd->idx = i * MXSER_PORTS_PER_BOARD;
- dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
- mxser_cards[ent->driver_data].name,
- pdev->bus->number, PCI_SLOT(pdev->devfn));
-
- retval = pci_enable_device(pdev);
- if (retval) {
- dev_err(&pdev->dev, "PCI enable failed\n");
- goto err;
- }
-
- /* io address */
- ioaddress = pci_resource_start(pdev, 2);
- retval = pci_request_region(pdev, 2, "mxser(IO)");
- if (retval)
- goto err_dis;
-
- brd->info = &mxser_cards[ent->driver_data];
- for (i = 0; i < brd->info->nports; i++)
- brd->ports[i].ioaddr = ioaddress + 8 * i;
-
- /* vector */
- ioaddress = pci_resource_start(pdev, 3);
- retval = pci_request_region(pdev, 3, "mxser(vector)");
- if (retval)
- goto err_zero;
- brd->vector = ioaddress;
-
- /* irq */
- brd->irq = pdev->irq;
-
- brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
- brd->uart_type = PORT_16550A;
- brd->vector_mask = 0;
-
- for (i = 0; i < brd->info->nports; i++) {
- for (j = 0; j < UART_INFO_NUM; j++) {
- if (Gpci_uart_info[j].type == brd->chip_flag) {
- brd->ports[i].max_baud =
- Gpci_uart_info[j].max_baud;
-
- /* exception....CP-102 */
- if (brd->info->flags & MXSER_HIGHBAUD)
- brd->ports[i].max_baud = 921600;
- break;
- }
- }
- }
-
- if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
- for (i = 0; i < brd->info->nports; i++) {
- if (i < 4)
- brd->ports[i].opmode_ioaddr = ioaddress + 4;
- else
- brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
- }
- outb(0, ioaddress + 4); /* default set to RS232 mode */
- outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
- }
-
- for (i = 0; i < brd->info->nports; i++) {
- brd->vector_mask |= (1 << i);
- brd->ports[i].baud_base = 921600;
- }
-
- /* mxser_initbrd will hook ISR. */
- retval = mxser_initbrd(brd, pdev);
- if (retval)
- goto err_rel3;
-
- for (i = 0; i < brd->info->nports; i++)
- tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
-
- pci_set_drvdata(pdev, brd);
-
- return 0;
-err_rel3:
- pci_release_region(pdev, 3);
-err_zero:
- brd->info = NULL;
- pci_release_region(pdev, 2);
-err_dis:
- pci_disable_device(pdev);
-err:
- return retval;
-#else
- return -ENODEV;
-#endif
-}
-
-static void __devexit mxser_remove(struct pci_dev *pdev)
-{
-#ifdef CONFIG_PCI
- struct mxser_board *brd = pci_get_drvdata(pdev);
- unsigned int i;
-
- for (i = 0; i < brd->info->nports; i++)
- tty_unregister_device(mxvar_sdriver, brd->idx + i);
-
- free_irq(pdev->irq, brd);
- pci_release_region(pdev, 2);
- pci_release_region(pdev, 3);
- pci_disable_device(pdev);
- brd->info = NULL;
-#endif
-}
-
-static struct pci_driver mxser_driver = {
- .name = "mxser",
- .id_table = mxser_pcibrds,
- .probe = mxser_probe,
- .remove = __devexit_p(mxser_remove)
-};
-
-static int __init mxser_module_init(void)
-{
- struct mxser_board *brd;
- unsigned int b, i, m;
- int retval;
-
- mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
- if (!mxvar_sdriver)
- return -ENOMEM;
-
- printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
- MXSER_VERSION);
-
- /* Initialize the tty_driver structure */
- mxvar_sdriver->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;
- }
-
- /* Start finding ISA boards here */
- for (m = 0, b = 0; b < MXSER_BOARDS; b++) {
- if (!ioaddr[b])
- continue;
-
- brd = &mxser_boards[m];
- retval = mxser_get_ISA_conf(ioaddr[b], brd);
- if (retval <= 0) {
- brd->info = NULL;
- continue;
- }
-
- printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n",
- brd->info->name, ioaddr[b]);
-
- /* mxser_initbrd will hook ISR. */
- if (mxser_initbrd(brd, NULL) < 0) {
- brd->info = NULL;
- continue;
- }
-
- brd->idx = m * MXSER_PORTS_PER_BOARD;
- for (i = 0; i < brd->info->nports; i++)
- tty_register_device(mxvar_sdriver, brd->idx + i, NULL);
-
- m++;
- }
-
- retval = pci_register_driver(&mxser_driver);
- if (retval) {
- printk(KERN_ERR "mxser: can't register pci driver\n");
- if (!m) {
- retval = -ENODEV;
- goto err_unr;
- } /* else: we have some ISA cards under control */
- }
-
- return 0;
-err_unr:
- tty_unregister_driver(mxvar_sdriver);
-err_put:
- put_tty_driver(mxvar_sdriver);
- return retval;
-}
-
-static void __exit mxser_module_exit(void)
-{
- unsigned int i, j;
-
- pci_unregister_driver(&mxser_driver);
-
- for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
- if (mxser_boards[i].info != NULL)
- for (j = 0; j < mxser_boards[i].info->nports; j++)
- tty_unregister_device(mxvar_sdriver,
- mxser_boards[i].idx + j);
- tty_unregister_driver(mxvar_sdriver);
- put_tty_driver(mxvar_sdriver);
-
- for (i = 0; i < MXSER_BOARDS; i++)
- if (mxser_boards[i].info != NULL)
- mxser_release_ISA_res(&mxser_boards[i]);
-}
-
-module_init(mxser_module_init);
-module_exit(mxser_module_exit);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-29 16:57:35 +0000