v4.19.13 snapshot.
diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
new file mode 100644
index 0000000..8bc15cb
--- /dev/null
+++ b/drivers/tty/mxser.c
@@ -0,0 +1,2806 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * 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.
+ *
+ * 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 <linux/ratelimit.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <linux/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 const 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_hw_array(ioaddr, ulong, ioport, 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 */
+ unsigned int timeout;
+
+ int read_status_mask;
+ int ignore_status_mask;
+ unsigned int xmit_fifo_size;
+ int xmit_head;
+ int xmit_tail;
+ int xmit_cnt;
+ int closing;
+
+ 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 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;
+ unsigned int quot = 0, baud;
+ unsigned char cval;
+ u64 timeout;
+
+ 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;
+ }
+
+ /*
+ * worst case (128 * 1000 * 10 * 18432) needs 35 bits, so divide in the
+ * u64 domain
+ */
+ timeout = (u64)info->xmit_fifo_size * HZ * 10 * quot;
+ do_div(timeout, info->baud_base);
+ info->timeout = 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 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;
+ tty_port_set_cts_flow(&info->port, cflag & CRTSCTS);
+ if (cflag & CRTSCTS) {
+ 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);
+ }
+ }
+ }
+ }
+ }
+ outb(info->MCR, info->ioaddr + UART_MCR);
+ tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL);
+ if (~cflag & CLOCAL)
+ 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 (tty_port_check_carrier(&port->port) && (status & UART_MSR_DDCD)) {
+ if (status & UART_MSR_DCD)
+ wake_up_interruptible(&port->port.open_wait);
+ }
+
+ if (tty_port_cts_enabled(&port->port)) {
+ if (tty->hw_stopped) {
+ if (status & UART_MSR_CTS) {
+ tty->hw_stopped = 0;
+
+ if ((port->type != PORT_16550A) &&
+ (!port->board->chip_flag)) {
+ outb(port->IER & ~UART_IER_THRI,
+ port->ioaddr + UART_IER);
+ port->IER |= UART_IER_THRI;
+ outb(port->IER, port->ioaddr +
+ UART_IER);
+ }
+ tty_wakeup(tty);
+ }
+ } else {
+ if (!(status & UART_MSR_CTS)) {
+ tty->hw_stopped = 1;
+ if (port->type != PORT_16550A &&
+ !port->board->chip_flag) {
+ port->IER &= ~UART_IER_THRI;
+ outb(port->IER, port->ioaddr +
+ UART_IER);
+ }
+ }
+ }
+ }
+}
+
+static int mxser_activate(struct tty_port *port, struct tty_struct *tty)
+{
+ struct mxser_port *info = container_of(port, struct mxser_port, port);
+ unsigned long page;
+ unsigned long flags;
+
+ page = __get_free_page(GFP_KERNEL);
+ if (!page)
+ return -ENOMEM;
+
+ spin_lock_irqsave(&info->slock, flags);
+
+ if (!info->ioaddr || !info->type) {
+ set_bit(TTY_IO_ERROR, &tty->flags);
+ free_page(page);
+ spin_unlock_irqrestore(&info->slock, flags);
+ return 0;
+ }
+ info->port.xmit_buf = (unsigned char *) page;
+
+ /*
+ * Clear the FIFO buffers and disable them
+ * (they will be reenabled in mxser_change_speed())
+ */
+ if (info->board->chip_flag)
+ outb((UART_FCR_CLEAR_RCVR |
+ UART_FCR_CLEAR_XMIT |
+ MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
+ else
+ outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
+ info->ioaddr + UART_FCR);
+
+ /*
+ * At this point there's no way the LSR could still be 0xFF;
+ * if it is, then bail out, because there's likely no UART
+ * here.
+ */
+ if (inb(info->ioaddr + UART_LSR) == 0xff) {
+ spin_unlock_irqrestore(&info->slock, flags);
+ if (capable(CAP_SYS_ADMIN)) {
+ set_bit(TTY_IO_ERROR, &tty->flags);
+ return 0;
+ } else
+ return -ENODEV;
+ }
+
+ /*
+ * Clear the interrupt registers.
+ */
+ (void) inb(info->ioaddr + UART_LSR);
+ (void) inb(info->ioaddr + UART_RX);
+ (void) inb(info->ioaddr + UART_IIR);
+ (void) inb(info->ioaddr + UART_MSR);
+
+ /*
+ * Now, initialize the UART
+ */
+ outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
+ info->MCR = UART_MCR_DTR | UART_MCR_RTS;
+ outb(info->MCR, info->ioaddr + UART_MCR);
+
+ /*
+ * Finally, enable interrupts
+ */
+ info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
+
+ if (info->board->chip_flag)
+ info->IER |= MOXA_MUST_IER_EGDAI;
+ outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
+
+ /*
+ * And clear the interrupt registers again for luck.
+ */
+ (void) inb(info->ioaddr + UART_LSR);
+ (void) inb(info->ioaddr + UART_RX);
+ (void) inb(info->ioaddr + UART_IIR);
+ (void) inb(info->ioaddr + UART_MSR);
+
+ clear_bit(TTY_IO_ERROR, &tty->flags);
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+
+ /*
+ * and set the speed of the serial port
+ */
+ mxser_change_speed(tty);
+ spin_unlock_irqrestore(&info->slock, flags);
+
+ return 0;
+}
+
+/*
+ * This routine will shutdown a serial port
+ */
+static void mxser_shutdown_port(struct tty_port *port)
+{
+ struct mxser_port *info = container_of(port, struct mxser_port, port);
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->slock, flags);
+
+ /*
+ * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
+ * here so the queue might never be waken up
+ */
+ wake_up_interruptible(&info->port.delta_msr_wait);
+
+ /*
+ * Free the xmit buffer, if necessary
+ */
+ if (info->port.xmit_buf) {
+ free_page((unsigned long) info->port.xmit_buf);
+ info->port.xmit_buf = NULL;
+ }
+
+ info->IER = 0;
+ outb(0x00, info->ioaddr + UART_IER);
+
+ /* clear Rx/Tx FIFO's */
+ if (info->board->chip_flag)
+ outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
+ MOXA_MUST_FCR_GDA_MODE_ENABLE,
+ info->ioaddr + UART_FCR);
+ else
+ outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
+ info->ioaddr + UART_FCR);
+
+ /* read data port to reset things */
+ (void) inb(info->ioaddr + UART_RX);
+
+
+ if (info->board->chip_flag)
+ SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
+
+ spin_unlock_irqrestore(&info->slock, flags);
+}
+
+/*
+ * This routine is called whenever a serial port is opened. It
+ * enables interrupts for a serial port, linking in its async structure into
+ * the IRQ chain. It also performs the serial-specific
+ * initialization for the tty structure.
+ */
+static int mxser_open(struct tty_struct *tty, struct file *filp)
+{
+ struct mxser_port *info;
+ int line;
+
+ line = tty->index;
+ if (line == MXSER_PORTS)
+ return 0;
+ info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
+ if (!info->ioaddr)
+ return -ENODEV;
+
+ tty->driver_data = info;
+ return tty_port_open(&info->port, tty, filp);
+}
+
+static void mxser_flush_buffer(struct tty_struct *tty)
+{
+ struct mxser_port *info = tty->driver_data;
+ char fcr;
+ unsigned long flags;
+
+
+ spin_lock_irqsave(&info->slock, flags);
+ info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
+
+ fcr = inb(info->ioaddr + UART_FCR);
+ outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
+ info->ioaddr + UART_FCR);
+ outb(fcr, info->ioaddr + UART_FCR);
+
+ spin_unlock_irqrestore(&info->slock, flags);
+
+ tty_wakeup(tty);
+}
+
+
+static void mxser_close_port(struct tty_port *port)
+{
+ struct mxser_port *info = container_of(port, struct mxser_port, port);
+ unsigned long timeout;
+ /*
+ * At this point we stop accepting input. To do this, we
+ * disable the receive line status interrupts, and tell the
+ * interrupt driver to stop checking the data ready bit in the
+ * line status register.
+ */
+ info->IER &= ~UART_IER_RLSI;
+ if (info->board->chip_flag)
+ info->IER &= ~MOXA_MUST_RECV_ISR;
+
+ outb(info->IER, info->ioaddr + UART_IER);
+ /*
+ * Before we drop DTR, make sure the UART transmitter
+ * has completely drained; this is especially
+ * important if there is a transmit FIFO!
+ */
+ timeout = jiffies + HZ;
+ while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
+ schedule_timeout_interruptible(5);
+ if (time_after(jiffies, timeout))
+ break;
+ }
+}
+
+/*
+ * This routine is called when the serial port gets closed. First, we
+ * wait for the last remaining data to be sent. Then, we unlink its
+ * async structure from the interrupt chain if necessary, and we free
+ * that IRQ if nothing is left in the chain.
+ */
+static void mxser_close(struct tty_struct *tty, struct file *filp)
+{
+ struct mxser_port *info = tty->driver_data;
+ struct tty_port *port = &info->port;
+
+ if (tty->index == MXSER_PORTS || info == NULL)
+ return;
+ if (tty_port_close_start(port, tty, filp) == 0)
+ return;
+ info->closing = 1;
+ mutex_lock(&port->mutex);
+ mxser_close_port(port);
+ mxser_flush_buffer(tty);
+ if (tty_port_initialized(port) && C_HUPCL(tty))
+ tty_port_lower_dtr_rts(port);
+ mxser_shutdown_port(port);
+ tty_port_set_initialized(port, 0);
+ mutex_unlock(&port->mutex);
+ info->closing = 0;
+ /* 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,
+ };
+ 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;
+ port->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 (tty_port_initialized(port)) {
+ if (flags != (port->flags & ASYNC_SPD_MASK)) {
+ spin_lock_irqsave(&info->slock, sl_flags);
+ mxser_change_speed(tty);
+ spin_unlock_irqrestore(&info->slock, sl_flags);
+ }
+ } else {
+ retval = mxser_activate(port, tty);
+ if (retval == 0)
+ tty_port_set_initialized(port, 1);
+ }
+ 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 (tty_io_error(tty))
+ 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 (tty_io_error(tty))
+ return -EIO;
+
+ spin_lock_irqsave(&info->slock, flags);
+
+ if (set & TIOCM_RTS)
+ info->MCR |= UART_MCR_RTS;
+ if (set & TIOCM_DTR)
+ info->MCR |= UART_MCR_DTR;
+
+ if (clear & TIOCM_RTS)
+ info->MCR &= ~UART_MCR_RTS;
+ if (clear & TIOCM_DTR)
+ info->MCR &= ~UART_MCR_DTR;
+
+ outb(info->MCR, info->ioaddr + UART_MCR);
+ spin_unlock_irqrestore(&info->slock, flags);
+ return 0;
+}
+
+static int __init mxser_program_mode(int port)
+{
+ int id, i, j, n;
+
+ outb(0, port);
+ outb(0, port);
+ outb(0, port);
+ (void)inb(port);
+ (void)inb(port);
+ outb(0, port);
+ (void)inb(port);
+
+ id = inb(port + 1) & 0x1F;
+ if ((id != C168_ASIC_ID) &&
+ (id != C104_ASIC_ID) &&
+ (id != C102_ASIC_ID) &&
+ (id != CI132_ASIC_ID) &&
+ (id != CI134_ASIC_ID) &&
+ (id != CI104J_ASIC_ID))
+ return -1;
+ for (i = 0, j = 0; i < 4; i++) {
+ n = inb(port + 2);
+ if (n == 'M') {
+ j = 1;
+ } else if ((j == 1) && (n == 1)) {
+ j = 2;
+ break;
+ } else
+ j = 0;
+ }
+ if (j != 2)
+ id = -2;
+ return id;
+}
+
+static void __init mxser_normal_mode(int port)
+{
+ int i, n;
+
+ outb(0xA5, port + 1);
+ outb(0x80, port + 3);
+ outb(12, port + 0); /* 9600 bps */
+ outb(0, port + 1);
+ outb(0x03, port + 3); /* 8 data bits */
+ outb(0x13, port + 4); /* loop back mode */
+ for (i = 0; i < 16; i++) {
+ n = inb(port + 5);
+ if ((n & 0x61) == 0x60)
+ break;
+ if ((n & 1) == 1)
+ (void)inb(port);
+ }
+ outb(0x00, port + 4);
+}
+
+#define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
+#define CHIP_DO 0x02 /* Serial Data Output in Eprom */
+#define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
+#define CHIP_DI 0x08 /* Serial Data Input in Eprom */
+#define EN_CCMD 0x000 /* Chip's command register */
+#define EN0_RSARLO 0x008 /* Remote start address reg 0 */
+#define EN0_RSARHI 0x009 /* Remote start address reg 1 */
+#define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
+#define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
+#define EN0_DCFG 0x00E /* Data configuration reg WR */
+#define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
+#define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
+#define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
+static int __init mxser_read_register(int port, unsigned short *regs)
+{
+ int i, k, value, id;
+ unsigned int j;
+
+ id = mxser_program_mode(port);
+ if (id < 0)
+ return id;
+ for (i = 0; i < 14; i++) {
+ k = (i & 0x3F) | 0x180;
+ for (j = 0x100; j > 0; j >>= 1) {
+ outb(CHIP_CS, port);
+ if (k & j) {
+ outb(CHIP_CS | CHIP_DO, port);
+ outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
+ } else {
+ outb(CHIP_CS, port);
+ outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
+ }
+ }
+ (void)inb(port);
+ value = 0;
+ for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
+ outb(CHIP_CS, port);
+ outb(CHIP_CS | CHIP_SK, port);
+ if (inb(port) & CHIP_DI)
+ value |= j;
+ }
+ regs[i] = value;
+ outb(0, port);
+ }
+ mxser_normal_mode(port);
+ return id;
+}
+
+static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
+{
+ struct mxser_port *ip;
+ struct tty_port *port;
+ struct tty_struct *tty;
+ int result, status;
+ unsigned int i, j;
+ int ret = 0;
+
+ switch (cmd) {
+ case MOXA_GET_MAJOR:
+ printk_ratelimited(KERN_WARNING "mxser: '%s' uses deprecated ioctl "
+ "%x (GET_MAJOR), fix your userspace\n",
+ current->comm, cmd);
+ return put_user(ttymajor, (int __user *)argp);
+
+ case MOXA_CHKPORTENABLE:
+ result = 0;
+ for (i = 0; i < MXSER_BOARDS; i++)
+ for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
+ if (mxser_boards[i].ports[j].ioaddr)
+ result |= (1 << i);
+ return put_user(result, (unsigned long __user *)argp);
+ case MOXA_GETDATACOUNT:
+ /* The receive side is locked by port->slock but it isn't
+ clear that an exact snapshot is worth copying here */
+ if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
+ ret = -EFAULT;
+ return ret;
+ case MOXA_GETMSTATUS: {
+ struct mxser_mstatus ms, __user *msu = argp;
+ for (i = 0; i < MXSER_BOARDS; i++)
+ for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
+ ip = &mxser_boards[i].ports[j];
+ port = &ip->port;
+ memset(&ms, 0, sizeof(ms));
+
+ mutex_lock(&port->mutex);
+ if (!ip->ioaddr)
+ goto copy;
+
+ tty = tty_port_tty_get(port);
+
+ if (!tty)
+ ms.cflag = ip->normal_termios.c_cflag;
+ else
+ ms.cflag = tty->termios.c_cflag;
+ tty_kref_put(tty);
+ spin_lock_irq(&ip->slock);
+ status = inb(ip->ioaddr + UART_MSR);
+ spin_unlock_irq(&ip->slock);
+ if (status & UART_MSR_DCD)
+ ms.dcd = 1;
+ if (status & UART_MSR_DSR)
+ ms.dsr = 1;
+ if (status & UART_MSR_CTS)
+ ms.cts = 1;
+ copy:
+ mutex_unlock(&port->mutex);
+ if (copy_to_user(msu, &ms, sizeof(ms)))
+ return -EFAULT;
+ msu++;
+ }
+ return 0;
+ }
+ case MOXA_ASPP_MON_EXT: {
+ struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */
+ unsigned int cflag, iflag, p;
+ u8 opmode;
+
+ me = kzalloc(sizeof(*me), GFP_KERNEL);
+ if (!me)
+ return -ENOMEM;
+
+ for (i = 0, p = 0; i < MXSER_BOARDS; i++) {
+ for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) {
+ if (p >= ARRAY_SIZE(me->rx_cnt)) {
+ i = MXSER_BOARDS;
+ break;
+ }
+ ip = &mxser_boards[i].ports[j];
+ port = &ip->port;
+
+ mutex_lock(&port->mutex);
+ if (!ip->ioaddr) {
+ mutex_unlock(&port->mutex);
+ continue;
+ }
+
+ spin_lock_irq(&ip->slock);
+ status = mxser_get_msr(ip->ioaddr, 0, p);
+
+ if (status & UART_MSR_TERI)
+ ip->icount.rng++;
+ if (status & UART_MSR_DDSR)
+ ip->icount.dsr++;
+ if (status & UART_MSR_DDCD)
+ ip->icount.dcd++;
+ if (status & UART_MSR_DCTS)
+ ip->icount.cts++;
+
+ ip->mon_data.modem_status = status;
+ me->rx_cnt[p] = ip->mon_data.rxcnt;
+ me->tx_cnt[p] = ip->mon_data.txcnt;
+ me->up_rxcnt[p] = ip->mon_data.up_rxcnt;
+ me->up_txcnt[p] = ip->mon_data.up_txcnt;
+ me->modem_status[p] =
+ ip->mon_data.modem_status;
+ spin_unlock_irq(&ip->slock);
+
+ tty = tty_port_tty_get(&ip->port);
+
+ if (!tty) {
+ cflag = ip->normal_termios.c_cflag;
+ iflag = ip->normal_termios.c_iflag;
+ me->baudrate[p] = tty_termios_baud_rate(&ip->normal_termios);
+ } else {
+ cflag = tty->termios.c_cflag;
+ iflag = tty->termios.c_iflag;
+ me->baudrate[p] = tty_get_baud_rate(tty);
+ }
+ tty_kref_put(tty);
+
+ me->databits[p] = cflag & CSIZE;
+ me->stopbits[p] = cflag & CSTOPB;
+ me->parity[p] = cflag & (PARENB | PARODD |
+ CMSPAR);
+
+ if (cflag & CRTSCTS)
+ me->flowctrl[p] |= 0x03;
+
+ if (iflag & (IXON | IXOFF))
+ me->flowctrl[p] |= 0x0C;
+
+ if (ip->type == PORT_16550A)
+ me->fifo[p] = 1;
+
+ if (ip->board->chip_flag == MOXA_MUST_MU860_HWID) {
+ opmode = inb(ip->opmode_ioaddr)>>((p % 4) * 2);
+ opmode &= OP_MODE_MASK;
+ } else {
+ opmode = RS232_MODE;
+ }
+ 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;
+
+ if (info->board->chip_flag != MOXA_MUST_MU860_HWID)
+ return -EFAULT;
+
+ 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 && tty_io_error(tty))
+ 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 (C_CRTSCTS(tty)) {
+ 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 (C_CRTSCTS(tty)) {
+ 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);
+ spin_unlock_irqrestore(&info->slock, flags);
+
+ if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) {
+ tty->hw_stopped = 0;
+ mxser_start(tty);
+ }
+
+ /* Handle sw stopped */
+ if ((old_termios->c_iflag & IXON) && !I_IXON(tty)) {
+ tty->stopped = 0;
+
+ if (info->board->chip_flag) {
+ spin_lock_irqsave(&info->slock, flags);
+ mxser_disable_must_rx_software_flow_control(
+ info->ioaddr);
+ spin_unlock_irqrestore(&info->slock, flags);
+ }
+
+ mxser_start(tty);
+ }
+}
+
+/*
+ * mxser_wait_until_sent() --- wait until the transmitter is empty
+ */
+static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
+{
+ struct mxser_port *info = tty->driver_data;
+ unsigned long orig_jiffies, char_time;
+ unsigned long flags;
+ int lsr;
+
+ if (info->type == PORT_UNKNOWN)
+ return;
+
+ if (info->xmit_fifo_size == 0)
+ return; /* Just in case.... */
+
+ orig_jiffies = jiffies;
+ /*
+ * Set the check interval to be 1/5 of the estimated time to
+ * send a single character, and make it at least 1. The check
+ * interval should also be less than the timeout.
+ *
+ * Note: we have to use pretty tight timings here to satisfy
+ * the NIST-PCTS.
+ */
+ char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
+ char_time = char_time / 5;
+ if (char_time == 0)
+ char_time = 1;
+ if (timeout && timeout < char_time)
+ char_time = timeout;
+ /*
+ * If the transmitter hasn't cleared in twice the approximate
+ * amount of time to send the entire FIFO, it probably won't
+ * ever clear. This assumes the UART isn't doing flow
+ * control, which is currently the case. Hence, if it ever
+ * takes longer than info->timeout, this is probably due to a
+ * UART bug of some kind. So, we clamp the timeout parameter at
+ * 2*info->timeout.
+ */
+ if (!timeout || timeout > 2 * info->timeout)
+ timeout = 2 * info->timeout;
+
+ spin_lock_irqsave(&info->slock, flags);
+ while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
+ spin_unlock_irqrestore(&info->slock, flags);
+ schedule_timeout_interruptible(char_time);
+ spin_lock_irqsave(&info->slock, flags);
+ if (signal_pending(current))
+ break;
+ if (timeout && time_after(jiffies, orig_jiffies + timeout))
+ break;
+ }
+ spin_unlock_irqrestore(&info->slock, flags);
+ set_current_state(TASK_RUNNING);
+}
+
+/*
+ * This routine is called by tty_hangup() when a hangup is signaled.
+ */
+static void mxser_hangup(struct tty_struct *tty)
+{
+ struct mxser_port *info = tty->driver_data;
+
+ mxser_flush_buffer(tty);
+ tty_port_hangup(&info->port);
+}
+
+/*
+ * mxser_rs_break() --- routine which turns the break handling on or off
+ */
+static int mxser_rs_break(struct tty_struct *tty, int break_state)
+{
+ struct mxser_port *info = tty->driver_data;
+ unsigned long flags;
+
+ spin_lock_irqsave(&info->slock, flags);
+ if (break_state == -1)
+ outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
+ info->ioaddr + UART_LCR);
+ else
+ outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
+ info->ioaddr + UART_LCR);
+ spin_unlock_irqrestore(&info->slock, flags);
+ return 0;
+}
+
+static void mxser_receive_chars(struct tty_struct *tty,
+ struct mxser_port *port, int *status)
+{
+ unsigned char ch, gdl;
+ int ignored = 0;
+ int cnt = 0;
+ int recv_room;
+ int max = 256;
+
+ recv_room = tty->receive_room;
+ if (recv_room == 0 && !port->ldisc_stop_rx)
+ mxser_stoprx(tty);
+ if (port->board->chip_flag != MOXA_OTHER_UART) {
+
+ if (*status & UART_LSR_SPECIAL)
+ goto intr_old;
+ if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
+ (*status & MOXA_MUST_LSR_RERR))
+ goto intr_old;
+ if (*status & MOXA_MUST_LSR_RERR)
+ goto intr_old;
+
+ gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
+
+ if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
+ gdl &= MOXA_MUST_GDL_MASK;
+ if (gdl >= recv_room) {
+ if (!port->ldisc_stop_rx)
+ mxser_stoprx(tty);
+ }
+ while (gdl--) {
+ ch = inb(port->ioaddr + UART_RX);
+ tty_insert_flip_char(&port->port, 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(&port->port, 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(&port->port);
+ 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->closing ||
+ !tty_port_initialized(&port->port)) {
+ status = inb(port->ioaddr + UART_LSR);
+ outb(0x27, port->ioaddr + UART_FCR);
+ inb(port->ioaddr + UART_MSR);
+ tty_kref_put(tty);
+ break;
+ }
+
+ status = inb(port->ioaddr + UART_LSR);
+
+ if (status & UART_LSR_PE)
+ port->err_shadow |= NPPI_NOTIFY_PARITY;
+ if (status & UART_LSR_FE)
+ port->err_shadow |= NPPI_NOTIFY_FRAMING;
+ if (status & UART_LSR_OE)
+ port->err_shadow |=
+ NPPI_NOTIFY_HW_OVERRUN;
+ if (status & UART_LSR_BI)
+ port->err_shadow |= NPPI_NOTIFY_BREAK;
+
+ if (port->board->chip_flag) {
+ if (iir == MOXA_MUST_IIR_GDA ||
+ iir == MOXA_MUST_IIR_RDA ||
+ iir == MOXA_MUST_IIR_RTO ||
+ iir == MOXA_MUST_IIR_LSR)
+ mxser_receive_chars(tty, port,
+ &status);
+
+ } else {
+ status &= port->read_status_mask;
+ if (status & UART_LSR_DR)
+ mxser_receive_chars(tty, port,
+ &status);
+ }
+ msr = inb(port->ioaddr + UART_MSR);
+ if (msr & UART_MSR_ANY_DELTA)
+ mxser_check_modem_status(tty, port, msr);
+
+ if (port->board->chip_flag) {
+ if (iir == 0x02 && (status &
+ UART_LSR_THRE))
+ mxser_transmit_chars(tty, port);
+ } else {
+ if (status & UART_LSR_THRE)
+ mxser_transmit_chars(tty, port);
+ }
+ tty_kref_put(tty);
+ } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
+ spin_unlock(&port->slock);
+ }
+ }
+
+irq_stop:
+ return handled;
+}
+
+static const struct tty_operations mxser_ops = {
+ .open = mxser_open,
+ .close = mxser_close,
+ .write = mxser_write,
+ .put_char = mxser_put_char,
+ .flush_chars = mxser_flush_chars,
+ .write_room = mxser_write_room,
+ .chars_in_buffer = mxser_chars_in_buffer,
+ .flush_buffer = mxser_flush_buffer,
+ .ioctl = mxser_ioctl,
+ .throttle = mxser_throttle,
+ .unthrottle = mxser_unthrottle,
+ .set_termios = mxser_set_termios,
+ .stop = mxser_stop,
+ .start = mxser_start,
+ .hangup = mxser_hangup,
+ .break_ctl = mxser_rs_break,
+ .wait_until_sent = mxser_wait_until_sent,
+ .tiocmget = mxser_tiocmget,
+ .tiocmset = mxser_tiocmset,
+ .get_icount = mxser_get_icount,
+};
+
+static const struct tty_port_operations mxser_port_ops = {
+ .carrier_raised = mxser_carrier_raised,
+ .dtr_rts = mxser_dtr_rts,
+ .activate = mxser_activate,
+ .shutdown = mxser_shutdown_port,
+};
+
+/*
+ * The MOXA Smartio/Industio serial driver boot-time initialization code!
+ */
+
+static bool allow_overlapping_vector;
+module_param(allow_overlapping_vector, bool, S_IRUGO);
+MODULE_PARM_DESC(allow_overlapping_vector, "whether we allow ISA cards to be configured such that vector overlabs IO ports (default=no)");
+
+static bool mxser_overlapping_vector(struct mxser_board *brd)
+{
+ return allow_overlapping_vector &&
+ brd->vector >= brd->ports[0].ioaddr &&
+ brd->vector < brd->ports[0].ioaddr + 8 * brd->info->nports;
+}
+
+static int mxser_request_vector(struct mxser_board *brd)
+{
+ if (mxser_overlapping_vector(brd))
+ return 0;
+ return request_region(brd->vector, 1, "mxser(vector)") ? 0 : -EIO;
+}
+
+static void mxser_release_vector(struct mxser_board *brd)
+{
+ if (mxser_overlapping_vector(brd))
+ return;
+ release_region(brd->vector, 1);
+}
+
+static void mxser_release_ISA_res(struct mxser_board *brd)
+{
+ release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
+ mxser_release_vector(brd);
+}
+
+static int mxser_initbrd(struct mxser_board *brd)
+{
+ 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->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) {
+ for (i = 0; i < brd->info->nports; i++)
+ tty_port_destroy(&brd->ports[i].port);
+ printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
+ "conflict with another device.\n",
+ brd->info->name, brd->irq);
+ }
+
+ return retval;
+}
+
+static void mxser_board_remove(struct mxser_board *brd)
+{
+ unsigned int i;
+
+ for (i = 0; i < brd->info->nports; i++) {
+ tty_unregister_device(mxvar_sdriver, brd->idx + i);
+ tty_port_destroy(&brd->ports[i].port);
+ }
+ free_irq(brd->irq, brd);
+}
+
+static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
+{
+ int id, i, bits, ret;
+ unsigned short regs[16], irq;
+ unsigned char scratch, scratch2;
+
+ brd->chip_flag = MOXA_OTHER_UART;
+
+ id = mxser_read_register(cap, regs);
+ switch (id) {
+ case C168_ASIC_ID:
+ brd->info = &mxser_cards[0];
+ break;
+ case C104_ASIC_ID:
+ brd->info = &mxser_cards[1];
+ break;
+ case CI104J_ASIC_ID:
+ brd->info = &mxser_cards[2];
+ break;
+ case C102_ASIC_ID:
+ brd->info = &mxser_cards[5];
+ break;
+ case CI132_ASIC_ID:
+ brd->info = &mxser_cards[6];
+ break;
+ case CI134_ASIC_ID:
+ brd->info = &mxser_cards[7];
+ break;
+ default:
+ return 0;
+ }
+
+ irq = 0;
+ /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
+ Flag-hack checks if configuration should be read as 2-port here. */
+ if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
+ irq = regs[9] & 0xF000;
+ irq = irq | (irq >> 4);
+ if (irq != (regs[9] & 0xFF00))
+ goto err_irqconflict;
+ } else if (brd->info->nports == 4) {
+ irq = regs[9] & 0xF000;
+ irq = irq | (irq >> 4);
+ irq = irq | (irq >> 8);
+ if (irq != regs[9])
+ goto err_irqconflict;
+ } else if (brd->info->nports == 8) {
+ irq = regs[9] & 0xF000;
+ irq = irq | (irq >> 4);
+ irq = irq | (irq >> 8);
+ if ((irq != regs[9]) || (irq != regs[10]))
+ goto err_irqconflict;
+ }
+
+ if (!irq) {
+ printk(KERN_ERR "mxser: interrupt number unset\n");
+ return -EIO;
+ }
+ brd->irq = ((int)(irq & 0xF000) >> 12);
+ for (i = 0; i < 8; i++)
+ brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
+ if ((regs[12] & 0x80) == 0) {
+ printk(KERN_ERR "mxser: invalid interrupt vector\n");
+ return -EIO;
+ }
+ brd->vector = (int)regs[11]; /* interrupt vector */
+ if (id == 1)
+ brd->vector_mask = 0x00FF;
+ else
+ brd->vector_mask = 0x000F;
+ for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
+ if (regs[12] & bits) {
+ brd->ports[i].baud_base = 921600;
+ brd->ports[i].max_baud = 921600;
+ } else {
+ brd->ports[i].baud_base = 115200;
+ brd->ports[i].max_baud = 115200;
+ }
+ }
+ scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
+ outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
+ outb(0, cap + UART_EFR); /* EFR is the same as FCR */
+ outb(scratch2, cap + UART_LCR);
+ outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
+ scratch = inb(cap + UART_IIR);
+
+ if (scratch & 0xC0)
+ brd->uart_type = PORT_16550A;
+ else
+ brd->uart_type = PORT_16450;
+ if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
+ "mxser(IO)")) {
+ printk(KERN_ERR "mxser: can't request ports I/O region: "
+ "0x%.8lx-0x%.8lx\n",
+ brd->ports[0].ioaddr, brd->ports[0].ioaddr +
+ 8 * brd->info->nports - 1);
+ return -EIO;
+ }
+
+ ret = mxser_request_vector(brd);
+ if (ret) {
+ release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
+ printk(KERN_ERR "mxser: can't request interrupt vector region: "
+ "0x%.8lx-0x%.8lx\n",
+ brd->ports[0].ioaddr, brd->ports[0].ioaddr +
+ 8 * brd->info->nports - 1);
+ return ret;
+ }
+ return brd->info->nports;
+
+err_irqconflict:
+ printk(KERN_ERR "mxser: invalid interrupt number\n");
+ return -EIO;
+}
+
+static int 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;
+ struct device *tty_dev;
+ 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);
+ if (retval)
+ goto err_rel3;
+
+ for (i = 0; i < brd->info->nports; i++) {
+ tty_dev = tty_port_register_device(&brd->ports[i].port,
+ mxvar_sdriver, brd->idx + i, &pdev->dev);
+ if (IS_ERR(tty_dev)) {
+ retval = PTR_ERR(tty_dev);
+ for (; i > 0; i--)
+ tty_unregister_device(mxvar_sdriver,
+ brd->idx + i - 1);
+ goto err_relbrd;
+ }
+ }
+
+ pci_set_drvdata(pdev, brd);
+
+ return 0;
+err_relbrd:
+ for (i = 0; i < brd->info->nports; i++)
+ tty_port_destroy(&brd->ports[i].port);
+ free_irq(brd->irq, brd);
+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 mxser_remove(struct pci_dev *pdev)
+{
+#ifdef CONFIG_PCI
+ struct mxser_board *brd = pci_get_drvdata(pdev);
+
+ mxser_board_remove(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 = mxser_remove
+};
+
+static int __init mxser_module_init(void)
+{
+ struct mxser_board *brd;
+ struct device *tty_dev;
+ unsigned int b, i, m;
+ int retval;
+
+ mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
+ if (!mxvar_sdriver)
+ return -ENOMEM;
+
+ printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
+ MXSER_VERSION);
+
+ /* Initialize the tty_driver structure */
+ mxvar_sdriver->name = "ttyMI";
+ mxvar_sdriver->major = ttymajor;
+ mxvar_sdriver->minor_start = 0;
+ mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
+ mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
+ mxvar_sdriver->init_termios = tty_std_termios;
+ mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
+ mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
+ tty_set_operations(mxvar_sdriver, &mxser_ops);
+
+ retval = tty_register_driver(mxvar_sdriver);
+ if (retval) {
+ printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
+ "tty driver !\n");
+ goto err_put;
+ }
+
+ /* Start finding ISA boards here */
+ for (m = 0, b = 0; b < MXSER_BOARDS; b++) {
+ if (!ioaddr[b])
+ continue;
+
+ brd = &mxser_boards[m];
+ retval = mxser_get_ISA_conf(ioaddr[b], brd);
+ if (retval <= 0) {
+ brd->info = NULL;
+ continue;
+ }
+
+ printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n",
+ brd->info->name, ioaddr[b]);
+
+ /* mxser_initbrd will hook ISR. */
+ if (mxser_initbrd(brd) < 0) {
+ mxser_release_ISA_res(brd);
+ brd->info = NULL;
+ continue;
+ }
+
+ brd->idx = m * MXSER_PORTS_PER_BOARD;
+ for (i = 0; i < brd->info->nports; i++) {
+ tty_dev = tty_port_register_device(&brd->ports[i].port,
+ mxvar_sdriver, brd->idx + i, NULL);
+ if (IS_ERR(tty_dev)) {
+ for (; i > 0; i--)
+ tty_unregister_device(mxvar_sdriver,
+ brd->idx + i - 1);
+ for (i = 0; i < brd->info->nports; i++)
+ tty_port_destroy(&brd->ports[i].port);
+ free_irq(brd->irq, brd);
+ mxser_release_ISA_res(brd);
+ brd->info = NULL;
+ break;
+ }
+ }
+ if (brd->info == NULL)
+ continue;
+
+ 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;
+
+ pci_unregister_driver(&mxser_driver);
+
+ for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
+ if (mxser_boards[i].info != NULL)
+ mxser_board_remove(&mxser_boards[i]);
+ 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);