/* * mxser.c -- MOXA Smartio/Industio family multiport serial driver. * * Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com.tw). * Copyright (C) 2006-2007 Jiri Slaby * * 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 * . The original 1.8 code is available on www.moxa.com. * - Fixed x86_64 cleanness * - Fixed sleep with spinlock held in mxser_send_break */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "mxser_new.h" #define MXSER_VERSION "2.0.2" /* 1.10 */ #define MXSERMAJOR 174 #define MXSERCUMAJOR 175 #define MXSER_BOARDS 4 /* Max. boards */ #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */ #define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD) #define MXSER_ISR_PASS_LIMIT 100 #define MXSER_ERR_IOADDR -1 #define MXSER_ERR_IRQ -2 #define MXSER_ERR_IRQ_CONFLIT -3 #define MXSER_ERR_VECTOR -4 /*CheckIsMoxaMust return value*/ #define MOXA_OTHER_UART 0x00 #define MOXA_MUST_MU150_HWID 0x01 #define MOXA_MUST_MU860_HWID 0x02 #define WAKEUP_CHARS 256 #define UART_MCR_AFE 0x20 #define UART_LSR_SPECIAL 0x1E #define PCI_DEVICE_ID_CB108 0x1080 #define PCI_DEVICE_ID_CB114 0x1142 #define PCI_DEVICE_ID_CB134I 0x1341 #define PCI_DEVICE_ID_CP138U 0x1380 #define PCI_DEVICE_ID_POS104UL 0x1044 #define C168_ASIC_ID 1 #define C104_ASIC_ID 2 #define C102_ASIC_ID 0xB #define CI132_ASIC_ID 4 #define CI134_ASIC_ID 3 #define CI104J_ASIC_ID 5 #define MXSER_HIGHBAUD 1 #define MXSER_HAS2 2 /* This is only for PCI */ static const struct { int type; int tx_fifo; int rx_fifo; int xmit_fifo_size; int rx_high_water; int rx_trigger; int rx_low_water; long max_baud; } Gpci_uart_info[] = { {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L}, {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L}, {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L} }; #define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info) struct mxser_cardinfo { unsigned int nports; char *name; unsigned int flags; }; static const struct mxser_cardinfo mxser_cards[] = { /* 0*/ { 8, "C168 series", }, /* C168-ISA */ { 4, "C104 series", }, /* C104-ISA */ { 4, "CI-104J series", }, /* CI104J */ { 8, "C168H/PCI series", }, /* C168-PCI */ { 4, "C104H/PCI series", }, /* C104-PCI */ /* 5*/ { 4, "C102 series", MXSER_HAS2 }, /* C102-ISA */ { 4, "CI-132 series", MXSER_HAS2 }, /* CI132 */ { 4, "CI-134 series", }, /* CI134 */ { 2, "CP-132 series", }, /* CP132 */ { 4, "CP-114 series", }, /* CP114 */ /*10*/ { 4, "CT-114 series", }, /* CT114 */ { 2, "CP-102 series", MXSER_HIGHBAUD }, /* CP102 */ { 4, "CP-104U series", }, /* CP104U */ { 8, "CP-168U series", }, /* CP168U */ { 2, "CP-132U series", }, /* CP132U */ /*15*/ { 4, "CP-134U series", }, /* CP134U */ { 4, "CP-104JU series", }, /* CP104JU */ { 8, "Moxa UC7000 Serial", }, /* RC7000 */ { 8, "CP-118U series", }, /* CP118U */ { 2, "CP-102UL series", }, /* CP102UL */ /*20*/ { 2, "CP-102U series", }, /* CP102U */ { 8, "CP-118EL series", }, /* CP118EL */ { 8, "CP-168EL series", }, /* CP168EL */ { 4, "CP-104EL series", }, { 8, "CB-108 series", }, /*25*/ { 4, "CB-114 series", }, { 4, "CB-134I series", }, { 8, "CP-138U series", }, { 4, "POS-104UL series", } }; /* 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_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 }, { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 }, { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 }, { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 }, { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 }, { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 }, { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 }, { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 }, { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 }, { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 }, { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU), .driver_data = 16 }, { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 }, { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 }, { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL), .driver_data = 19 }, { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 }, { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118EL), .driver_data = 21 }, { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168EL), .driver_data = 22 }, { PCI_DEVICE(PCI_VENDOR_ID_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 }, { } }; MODULE_DEVICE_TABLE(pci, mxser_pcibrds); static int mxvar_baud_table[] = { 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600 }; static unsigned int mxvar_baud_table1[] = { 0, B50, B75, B110, B134, B150, B200, B300, B600, B1200, B1800, B2400, B4800, B9600, B19200, B38400, B57600, B115200, B230400, B460800, B921600 }; #define BAUD_TABLE_NO ARRAY_SIZE(mxvar_baud_table) #define B_SPEC B2000000 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 }; static int ttymajor = MXSERMAJOR; static int calloutmajor = MXSERCUMAJOR; /* Variables for insmod */ MODULE_AUTHOR("Casper Yang"); MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver"); module_param_array(ioaddr, int, NULL, 0); module_param(ttymajor, int, 0); MODULE_LICENSE("GPL"); struct mxser_log { int tick; unsigned long rxcnt[MXSER_PORTS]; unsigned long txcnt[MXSER_PORTS]; }; struct mxser_mon { unsigned long rxcnt; unsigned long txcnt; unsigned long up_rxcnt; unsigned long up_txcnt; int modem_status; unsigned char hold_reason; }; struct mxser_mon_ext { unsigned long rx_cnt[32]; unsigned long tx_cnt[32]; unsigned long up_rxcnt[32]; unsigned long up_txcnt[32]; int modem_status[32]; long baudrate[32]; int databits[32]; int stopbits[32]; int parity[32]; int flowctrl[32]; int fifo[32]; int iftype[32]; }; struct mxser_board; struct mxser_port { struct mxser_board *board; struct tty_struct *tty; unsigned long ioaddr; unsigned long opmode_ioaddr; int max_baud; int rx_high_water; int rx_trigger; /* Rx fifo trigger level */ int rx_low_water; int baud_base; /* max. speed */ long realbaud; int type; /* UART type */ int flags; /* defined in tty.h */ int speed; int x_char; /* xon/xoff character */ int IER; /* Interrupt Enable Register */ int MCR; /* Modem control register */ unsigned char stop_rx; unsigned char ldisc_stop_rx; int custom_divisor; int close_delay; unsigned short closing_wait; unsigned char err_shadow; unsigned long event; int count; /* # of fd on device */ int blocked_open; /* # of blocked opens */ struct async_icount icount; /* kernel counters for 4 input interrupts */ int timeout; int read_status_mask; int ignore_status_mask; int xmit_fifo_size; unsigned char *xmit_buf; int xmit_head; int xmit_tail; int xmit_cnt; struct ktermios normal_termios; struct mxser_mon mon_data; spinlock_t slock; wait_queue_head_t open_wait; wait_queue_head_t delta_msr_wait; }; struct mxser_board { unsigned int idx; int irq; const struct mxser_cardinfo *info; unsigned long vector; unsigned long vector_mask; int chip_flag; int uart_type; struct mxser_port ports[MXSER_PORTS_PER_BOARD]; }; struct mxser_mstatus { tcflag_t cflag; int cts; int dsr; int ri; int dcd; }; static struct mxser_mstatus GMStatus[MXSER_PORTS]; static int mxserBoardCAP[MXSER_BOARDS] = { 0, 0, 0, 0 /* 0x180, 0x280, 0x200, 0x320 */ }; static struct mxser_board mxser_boards[MXSER_BOARDS]; static struct tty_driver *mxvar_sdriver; static struct mxser_log mxvar_log; static int mxvar_diagflag; static unsigned char mxser_msr[MXSER_PORTS + 1]; static struct mxser_mon_ext mon_data_ext; static int mxser_set_baud_method[MXSER_PORTS + 1]; #ifdef CONFIG_PCI static int __devinit CheckIsMoxaMust(int io) { u8 oldmcr, hwid; int i; outb(0, io + UART_LCR); DISABLE_MOXA_MUST_ENCHANCE_MODE(io); oldmcr = inb(io + UART_MCR); outb(0, io + UART_MCR); SET_MOXA_MUST_XON1_VALUE(io, 0x11); if ((hwid = inb(io + UART_MCR)) != 0) { outb(oldmcr, io + UART_MCR); return MOXA_OTHER_UART; } GET_MOXA_MUST_HARDWARE_ID(io, &hwid); for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */ if (hwid == Gpci_uart_info[i].type) return (int)hwid; } return MOXA_OTHER_UART; } #endif static void process_txrx_fifo(struct mxser_port *info) { int i; if ((info->type == PORT_16450) || (info->type == PORT_8250)) { info->rx_trigger = 1; info->rx_high_water = 1; info->rx_low_water = 1; info->xmit_fifo_size = 1; } else for (i = 0; i < UART_INFO_NUM; i++) if (info->board->chip_flag == Gpci_uart_info[i].type) { info->rx_trigger = Gpci_uart_info[i].rx_trigger; info->rx_low_water = Gpci_uart_info[i].rx_low_water; info->rx_high_water = Gpci_uart_info[i].rx_high_water; info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size; break; } } static unsigned char mxser_get_msr(int baseaddr, int mode, int port) { unsigned char status = 0; status = inb(baseaddr + UART_MSR); mxser_msr[port] &= 0x0F; mxser_msr[port] |= status; status = mxser_msr[port]; if (mode) mxser_msr[port] = 0; return status; } static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_port *port) { DECLARE_WAITQUEUE(wait, current); int retval; int do_clocal = 0; unsigned long flags; /* * If non-blocking mode is set, or the port is not enabled, * then make the check up front and then exit. */ if ((filp->f_flags & O_NONBLOCK) || test_bit(TTY_IO_ERROR, &tty->flags)) { port->flags |= ASYNC_NORMAL_ACTIVE; return 0; } if (tty->termios->c_cflag & CLOCAL) do_clocal = 1; /* * Block waiting for the carrier detect and the line to become * free (i.e., not in use by the callout). While we are in * this loop, port->count is dropped by one, so that * mxser_close() knows when to free things. We restore it upon * exit, either normal or abnormal. */ retval = 0; add_wait_queue(&port->open_wait, &wait); spin_lock_irqsave(&port->slock, flags); if (!tty_hung_up_p(filp)) port->count--; spin_unlock_irqrestore(&port->slock, flags); port->blocked_open++; while (1) { spin_lock_irqsave(&port->slock, flags); outb(inb(port->ioaddr + UART_MCR) | UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR); spin_unlock_irqrestore(&port->slock, flags); set_current_state(TASK_INTERRUPTIBLE); if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) { if (port->flags & ASYNC_HUP_NOTIFY) retval = -EAGAIN; else retval = -ERESTARTSYS; break; } if (!(port->flags & ASYNC_CLOSING) && (do_clocal || (inb(port->ioaddr + UART_MSR) & UART_MSR_DCD))) break; if (signal_pending(current)) { retval = -ERESTARTSYS; break; } schedule(); } set_current_state(TASK_RUNNING); remove_wait_queue(&port->open_wait, &wait); if (!tty_hung_up_p(filp)) port->count++; port->blocked_open--; if (retval) return retval; port->flags |= ASYNC_NORMAL_ACTIVE; return 0; } static int mxser_set_baud(struct mxser_port *info, long newspd) { unsigned int i; int quot = 0; unsigned char cval; int ret = 0; if (!info->tty || !info->tty->termios) return ret; if (!(info->ioaddr)) return ret; if (newspd > info->max_baud) return 0; info->realbaud = newspd; for (i = 0; i < BAUD_TABLE_NO; i++) if (newspd == mxvar_baud_table[i]) break; if (i == BAUD_TABLE_NO) { quot = info->baud_base / info->speed; if (info->speed <= 0 || info->speed > info->max_baud) quot = 0; } else { if (newspd == 134) { quot = (2 * info->baud_base / 269); } else if (newspd) { quot = info->baud_base / newspd; if (quot == 0) quot = 1; } else { quot = 0; } } info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base); info->timeout += HZ / 50; /* Add .02 seconds of slop */ if (quot) { 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 ret; } 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 */ if (i == BAUD_TABLE_NO) { quot = info->baud_base % info->speed; quot *= 8; if ((quot % info->speed) > (info->speed / 2)) { quot /= info->speed; quot++; } else { quot /= info->speed; } SET_MOXA_MUST_ENUM_VALUE(info->ioaddr, quot); } else SET_MOXA_MUST_ENUM_VALUE(info->ioaddr, 0); return ret; } /* * This routine is called to set the UART divisor registers to match * the specified baud rate for a serial port. */ static int mxser_change_speed(struct mxser_port *info, struct ktermios *old_termios) { unsigned cflag, cval, fcr; int ret = 0; unsigned char status; long baud; if (!info->tty || !info->tty->termios) return ret; cflag = info->tty->termios->c_cflag; if (!(info->ioaddr)) return ret; if (mxser_set_baud_method[info->tty->index] == 0) { if ((cflag & CBAUD) == B_SPEC) baud = info->speed; else baud = tty_get_baud_rate(info->tty); mxser_set_baud(info, baud); } /* byte size and parity */ switch (cflag & CSIZE) { case CS5: cval = 0x00; break; case CS6: cval = 0x01; break; case CS7: cval = 0x02; break; case CS8: cval = 0x03; break; default: cval = 0x00; break; /* too keep GCC shut... */ } if (cflag & CSTOPB) cval |= 0x04; if (cflag & PARENB) cval |= UART_LCR_PARITY; if (!(cflag & PARODD)) cval |= UART_LCR_EPAR; if (cflag & CMSPAR) cval |= UART_LCR_SPAR; if ((info->type == PORT_8250) || (info->type == PORT_16450)) { if (info->board->chip_flag) { fcr = UART_FCR_ENABLE_FIFO; fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE; SET_MOXA_MUST_FIFO_VALUE(info); } else fcr = 0; } else { fcr = UART_FCR_ENABLE_FIFO; if (info->board->chip_flag) { fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE; SET_MOXA_MUST_FIFO_VALUE(info); } else { switch (info->rx_trigger) { case 1: fcr |= UART_FCR_TRIGGER_1; break; case 4: fcr |= UART_FCR_TRIGGER_4; break; case 8: fcr |= UART_FCR_TRIGGER_8; break; default: fcr |= UART_FCR_TRIGGER_14; break; } } } /* CTS flow control flag and modem status interrupts */ info->IER &= ~UART_IER_MSI; info->MCR &= ~UART_MCR_AFE; if (cflag & CRTSCTS) { info->flags |= ASYNC_CTS_FLOW; info->IER |= UART_IER_MSI; if ((info->type == PORT_16550A) || (info->board->chip_flag)) { info->MCR |= UART_MCR_AFE; } else { status = inb(info->ioaddr + UART_MSR); if (info->tty->hw_stopped) { if (status & UART_MSR_CTS) { info->tty->hw_stopped = 0; if (info->type != PORT_16550A && !info->board->chip_flag) { outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); info->IER |= UART_IER_THRI; outb(info->IER, info->ioaddr + UART_IER); } tty_wakeup(info->tty); } } else { if (!(status & UART_MSR_CTS)) { info->tty->hw_stopped = 1; if ((info->type != PORT_16550A) && (!info->board->chip_flag)) { info->IER &= ~UART_IER_THRI; outb(info->IER, info->ioaddr + UART_IER); } } } } } else { info->flags &= ~ASYNC_CTS_FLOW; } outb(info->MCR, info->ioaddr + UART_MCR); if (cflag & CLOCAL) { info->flags &= ~ASYNC_CHECK_CD; } else { info->flags |= ASYNC_CHECK_CD; info->IER |= UART_IER_MSI; } outb(info->IER, info->ioaddr + UART_IER); /* * Set up parity check flag */ info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR; if (I_INPCK(info->tty)) info->read_status_mask |= UART_LSR_FE | UART_LSR_PE; if (I_BRKINT(info->tty) || I_PARMRK(info->tty)) info->read_status_mask |= UART_LSR_BI; info->ignore_status_mask = 0; if (I_IGNBRK(info->tty)) { info->ignore_status_mask |= UART_LSR_BI; info->read_status_mask |= UART_LSR_BI; /* * If we're ignore parity and break indicators, ignore * overruns too. (For real raw support). */ if (I_IGNPAR(info->tty)) { info->ignore_status_mask |= UART_LSR_OE | UART_LSR_PE | UART_LSR_FE; info->read_status_mask |= UART_LSR_OE | UART_LSR_PE | UART_LSR_FE; } } if (info->board->chip_flag) { SET_MOXA_MUST_XON1_VALUE(info->ioaddr, START_CHAR(info->tty)); SET_MOXA_MUST_XOFF1_VALUE(info->ioaddr, STOP_CHAR(info->tty)); if (I_IXON(info->tty)) { ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr); } else { DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr); } if (I_IXOFF(info->tty)) { ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr); } else { DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr); } } outb(fcr, info->ioaddr + UART_FCR); /* set fcr */ outb(cval, info->ioaddr + UART_LCR); return ret; } static void mxser_check_modem_status(struct mxser_port *port, int status) { /* update input line counters */ if (status & UART_MSR_TERI) port->icount.rng++; if (status & UART_MSR_DDSR) port->icount.dsr++; if (status & UART_MSR_DDCD) port->icount.dcd++; if (status & UART_MSR_DCTS) port->icount.cts++; port->mon_data.modem_status = status; wake_up_interruptible(&port->delta_msr_wait); if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) { if (status & UART_MSR_DCD) wake_up_interruptible(&port->open_wait); } if (port->flags & ASYNC_CTS_FLOW) { if (port->tty->hw_stopped) { if (status & UART_MSR_CTS) { port->tty->hw_stopped = 0; if ((port->type != PORT_16550A) && (!port->board->chip_flag)) { outb(port->IER & ~UART_IER_THRI, port->ioaddr + UART_IER); port->IER |= UART_IER_THRI; outb(port->IER, port->ioaddr + UART_IER); } tty_wakeup(port->tty); } } else { if (!(status & UART_MSR_CTS)) { port->tty->hw_stopped = 1; if (port->type != PORT_16550A && !port->board->chip_flag) { port->IER &= ~UART_IER_THRI; outb(port->IER, port->ioaddr + UART_IER); } } } } } static int mxser_startup(struct mxser_port *info) { unsigned long page; unsigned long flags; page = __get_free_page(GFP_KERNEL); if (!page) return -ENOMEM; spin_lock_irqsave(&info->slock, flags); if (info->flags & ASYNC_INITIALIZED) { free_page(page); spin_unlock_irqrestore(&info->slock, flags); return 0; } if (!info->ioaddr || !info->type) { if (info->tty) set_bit(TTY_IO_ERROR, &info->tty->flags); free_page(page); spin_unlock_irqrestore(&info->slock, flags); return 0; } if (info->xmit_buf) free_page(page); else info->xmit_buf = (unsigned char *) page; /* * Clear the FIFO buffers and disable them * (they will be reenabled in mxser_change_speed()) */ if (info->board->chip_flag) outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR); else outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->ioaddr + UART_FCR); /* * At this point there's no way the LSR could still be 0xFF; * if it is, then bail out, because there's likely no UART * here. */ if (inb(info->ioaddr + UART_LSR) == 0xff) { spin_unlock_irqrestore(&info->slock, flags); if (capable(CAP_SYS_ADMIN)) { if (info->tty) set_bit(TTY_IO_ERROR, &info->tty->flags); return 0; } else return -ENODEV; } /* * Clear the interrupt registers. */ (void) inb(info->ioaddr + UART_LSR); (void) inb(info->ioaddr + UART_RX); (void) inb(info->ioaddr + UART_IIR); (void) inb(info->ioaddr + UART_MSR); /* * Now, initialize the UART */ outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */ info->MCR = UART_MCR_DTR | UART_MCR_RTS; outb(info->MCR, info->ioaddr + UART_MCR); /* * Finally, enable interrupts */ info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI; if (info->board->chip_flag) info->IER |= MOXA_MUST_IER_EGDAI; outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */ /* * And clear the interrupt registers again for luck. */ (void) inb(info->ioaddr + UART_LSR); (void) inb(info->ioaddr + UART_RX); (void) inb(info->ioaddr + UART_IIR); (void) inb(info->ioaddr + UART_MSR); if (info->tty) clear_bit(TTY_IO_ERROR, &info->tty->flags); info->xmit_cnt = info->xmit_head = info->xmit_tail = 0; /* * and set the speed of the serial port */ mxser_change_speed(info, NULL); info->flags |= ASYNC_INITIALIZED; spin_unlock_irqrestore(&info->slock, flags); return 0; } /* * This routine will shutdown a serial port; interrupts maybe disabled, and * DTR is dropped if the hangup on close termio flag is on. */ static void mxser_shutdown(struct mxser_port *info) { unsigned long flags; if (!(info->flags & ASYNC_INITIALIZED)) return; spin_lock_irqsave(&info->slock, flags); /* * clear delta_msr_wait queue to avoid mem leaks: we may free the irq * here so the queue might never be waken up */ wake_up_interruptible(&info->delta_msr_wait); /* * Free the IRQ, if necessary */ if (info->xmit_buf) { free_page((unsigned long) info->xmit_buf); info->xmit_buf = NULL; } info->IER = 0; outb(0x00, info->ioaddr + UART_IER); if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS); outb(info->MCR, info->ioaddr + UART_MCR); /* clear Rx/Tx FIFO's */ if (info->board->chip_flag) outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | MOXA_MUST_FCR_GDA_MODE_ENABLE, info->ioaddr + UART_FCR); else outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT, info->ioaddr + UART_FCR); /* read data port to reset things */ (void) inb(info->ioaddr + UART_RX); if (info->tty) set_bit(TTY_IO_ERROR, &info->tty->flags); info->flags &= ~ASYNC_INITIALIZED; if (info->board->chip_flag) SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr); spin_unlock_irqrestore(&info->slock, flags); } /* * This routine is called whenever a serial port is opened. It * enables interrupts for a serial port, linking in its async structure into * the IRQ chain. It also performs the serial-specific * initialization for the tty structure. */ static int mxser_open(struct tty_struct *tty, struct file *filp) { struct mxser_port *info; unsigned long flags; int retval, line; line = tty->index; if (line == MXSER_PORTS) return 0; if (line < 0 || line > MXSER_PORTS) return -ENODEV; info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD]; if (!info->ioaddr) return -ENODEV; tty->driver_data = info; info->tty = tty; /* * Start up serial port */ spin_lock_irqsave(&info->slock, flags); info->count++; spin_unlock_irqrestore(&info->slock, flags); retval = mxser_startup(info); if (retval) return retval; retval = mxser_block_til_ready(tty, filp, info); if (retval) return retval; /* unmark here for very high baud rate (ex. 921600 bps) used */ tty->low_latency = 1; return 0; } /* * This routine is called when the serial port gets closed. First, we * wait for the last remaining data to be sent. Then, we unlink its * async structure from the interrupt chain if necessary, and we free * that IRQ if nothing is left in the chain. */ static void mxser_close(struct tty_struct *tty, struct file *filp) { struct mxser_port *info = tty->driver_data; unsigned long timeout; unsigned long flags; if (tty->index == MXSER_PORTS) return; if (!info) return; spin_lock_irqsave(&info->slock, flags); if (tty_hung_up_p(filp)) { spin_unlock_irqrestore(&info->slock, flags); return; } if ((tty->count == 1) && (info->count != 1)) { /* * Uh, oh. tty->count is 1, which means that the tty * structure will be freed. Info->count should always * be one in these conditions. If it's greater than * one, we've got real problems, since it means the * serial port won't be shutdown. */ printk(KERN_ERR "mxser_close: bad serial port count; " "tty->count is 1, info->count is %d\n", info->count); info->count = 1; } if (--info->count < 0) { printk(KERN_ERR "mxser_close: bad serial port count for " "ttys%d: %d\n", tty->index, info->count); info->count = 0; } if (info->count) { spin_unlock_irqrestore(&info->slock, flags); return; } info->flags |= ASYNC_CLOSING; spin_unlock_irqrestore(&info->slock, flags); /* * Save the termios structure, since this port may have * separate termios for callout and dialin. */ if (info->flags & ASYNC_NORMAL_ACTIVE) info->normal_termios = *tty->termios; /* * Now we wait for the transmit buffer to clear; and we notify * the line discipline to only process XON/XOFF characters. */ tty->closing = 1; if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE) tty_wait_until_sent(tty, info->closing_wait); /* * At this point we stop accepting input. To do this, we * disable the receive line status interrupts, and tell the * interrupt driver to stop checking the data ready bit in the * line status register. */ info->IER &= ~UART_IER_RLSI; if (info->board->chip_flag) info->IER &= ~MOXA_MUST_RECV_ISR; if (info->flags & ASYNC_INITIALIZED) { outb(info->IER, info->ioaddr + UART_IER); /* * Before we drop DTR, make sure the UART transmitter * has completely drained; this is especially * important if there is a transmit FIFO! */ timeout = jiffies + HZ; while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) { schedule_timeout_interruptible(5); if (time_after(jiffies, timeout)) break; } } mxser_shutdown(info); if (tty->driver->flush_buffer) tty->driver->flush_buffer(tty); tty_ldisc_flush(tty); tty->closing = 0; info->event = 0; info->tty = NULL; if (info->blocked_open) { if (info->close_delay) schedule_timeout_interruptible(info->close_delay); wake_up_interruptible(&info->open_wait); } info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); } static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count) { int c, total = 0; struct mxser_port *info = tty->driver_data; unsigned long flags; if (!info->xmit_buf) return 0; while (1) { c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, SERIAL_XMIT_SIZE - info->xmit_head)); if (c <= 0) break; memcpy(info->xmit_buf + info->xmit_head, buf, c); spin_lock_irqsave(&info->slock, flags); info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE - 1); info->xmit_cnt += c; spin_unlock_irqrestore(&info->slock, flags); buf += c; count -= c; total += c; } if (info->xmit_cnt && !tty->stopped) { if (!tty->hw_stopped || (info->type == PORT_16550A) || (info->board->chip_flag)) { spin_lock_irqsave(&info->slock, flags); outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); info->IER |= UART_IER_THRI; outb(info->IER, info->ioaddr + UART_IER); spin_unlock_irqrestore(&info->slock, flags); } } return total; } static void mxser_put_char(struct tty_struct *tty, unsigned char ch) { struct mxser_port *info = tty->driver_data; unsigned long flags; if (!info->xmit_buf) return; if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) return; spin_lock_irqsave(&info->slock, flags); info->xmit_buf[info->xmit_head++] = ch; info->xmit_head &= SERIAL_XMIT_SIZE - 1; info->xmit_cnt++; spin_unlock_irqrestore(&info->slock, flags); if (!tty->stopped) { 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); } } } static void mxser_flush_chars(struct tty_struct *tty) { struct mxser_port *info = tty->driver_data; unsigned long flags; if (info->xmit_cnt <= 0 || tty->stopped || !info->xmit_buf || (tty->hw_stopped && (info->type != PORT_16550A) && (!info->board->chip_flag) )) return; spin_lock_irqsave(&info->slock, flags); outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); info->IER |= UART_IER_THRI; outb(info->IER, info->ioaddr + UART_IER); spin_unlock_irqrestore(&info->slock, flags); } static int mxser_write_room(struct tty_struct *tty) { struct mxser_port *info = tty->driver_data; int ret; ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1; if (ret < 0) ret = 0; return ret; } static int mxser_chars_in_buffer(struct tty_struct *tty) { struct mxser_port *info = tty->driver_data; return info->xmit_cnt; } 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); } /* * ------------------------------------------------------------ * friends of mxser_ioctl() * ------------------------------------------------------------ */ static int mxser_get_serial_info(struct mxser_port *info, struct serial_struct __user *retinfo) { struct serial_struct tmp; if (!retinfo) return -EFAULT; memset(&tmp, 0, sizeof(tmp)); tmp.type = info->type; tmp.line = info->tty->index; tmp.port = info->ioaddr; tmp.irq = info->board->irq; tmp.flags = info->flags; tmp.baud_base = info->baud_base; tmp.close_delay = info->close_delay; tmp.closing_wait = info->closing_wait; tmp.custom_divisor = info->custom_divisor; tmp.hub6 = 0; if (copy_to_user(retinfo, &tmp, sizeof(*retinfo))) return -EFAULT; return 0; } static int mxser_set_serial_info(struct mxser_port *info, struct serial_struct __user *new_info) { struct serial_struct new_serial; unsigned long sl_flags; unsigned int flags; int retval = 0; if (!new_info || !info->ioaddr) return -EFAULT; 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) || (new_serial.custom_divisor != info->custom_divisor) || (new_serial.baud_base != info->baud_base)) return -EPERM; flags = info->flags & ASYNC_SPD_MASK; if (!capable(CAP_SYS_ADMIN)) { if ((new_serial.baud_base != info->baud_base) || (new_serial.close_delay != info->close_delay) || ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK))) return -EPERM; info->flags = ((info->flags & ~ASYNC_USR_MASK) | (new_serial.flags & ASYNC_USR_MASK)); } else { /* * OK, past this point, all the error checking has been done. * At this point, we start making changes..... */ info->flags = ((info->flags & ~ASYNC_FLAGS) | (new_serial.flags & ASYNC_FLAGS)); info->close_delay = new_serial.close_delay * HZ / 100; info->closing_wait = new_serial.closing_wait * HZ / 100; info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; info->tty->low_latency = 0; } info->type = new_serial.type; process_txrx_fifo(info); if (info->flags & ASYNC_INITIALIZED) { if (flags != (info->flags & ASYNC_SPD_MASK)) { spin_lock_irqsave(&info->slock, sl_flags); mxser_change_speed(info, NULL); spin_unlock_irqrestore(&info->slock, sl_flags); } } else retval = mxser_startup(info); return retval; } /* * mxser_get_lsr_info - get line status register info * * Purpose: Let user call ioctl() to get info when the UART physically * is emptied. On bus types like RS485, the transmitter must * release the bus after transmitting. This must be done when * the transmit shift register is empty, not be done when the * transmit holding register is empty. This functionality * allows an RS485 driver to be written in user space. */ static int mxser_get_lsr_info(struct mxser_port *info, unsigned int __user *value) { unsigned char status; unsigned int result; unsigned long flags; spin_lock_irqsave(&info->slock, flags); status = inb(info->ioaddr + UART_LSR); spin_unlock_irqrestore(&info->slock, flags); result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0); return put_user(result, value); } /* * This routine sends a break character out the serial port. */ static void mxser_send_break(struct mxser_port *info, int duration) { unsigned long flags; if (!info->ioaddr) return; set_current_state(TASK_INTERRUPTIBLE); spin_lock_irqsave(&info->slock, flags); outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC, info->ioaddr + UART_LCR); spin_unlock_irqrestore(&info->slock, flags); schedule_timeout(duration); spin_lock_irqsave(&info->slock, flags); outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC, info->ioaddr + UART_LCR); spin_unlock_irqrestore(&info->slock, flags); } static int mxser_tiocmget(struct tty_struct *tty, struct file *file) { struct mxser_port *info = tty->driver_data; unsigned char control, status; unsigned long flags; if (tty->index == MXSER_PORTS) return -ENOIOCTLCMD; if (test_bit(TTY_IO_ERROR, &tty->flags)) return -EIO; control = info->MCR; spin_lock_irqsave(&info->slock, flags); status = inb(info->ioaddr + UART_MSR); if (status & UART_MSR_ANY_DELTA) mxser_check_modem_status(info, status); spin_unlock_irqrestore(&info->slock, flags); return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) | ((status & UART_MSR_RI) ? TIOCM_RNG : 0) | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0); } static int mxser_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear) { struct mxser_port *info = tty->driver_data; unsigned long flags; if (tty->index == MXSER_PORTS) return -ENOIOCTLCMD; if (test_bit(TTY_IO_ERROR, &tty->flags)) return -EIO; spin_lock_irqsave(&info->slock, flags); if (set & TIOCM_RTS) info->MCR |= UART_MCR_RTS; if (set & TIOCM_DTR) info->MCR |= UART_MCR_DTR; if (clear & TIOCM_RTS) info->MCR &= ~UART_MCR_RTS; if (clear & TIOCM_DTR) info->MCR &= ~UART_MCR_DTR; outb(info->MCR, info->ioaddr + UART_MCR); spin_unlock_irqrestore(&info->slock, flags); return 0; } static int __init mxser_program_mode(int port) { int id, i, j, n; outb(0, port); outb(0, port); outb(0, port); (void)inb(port); (void)inb(port); outb(0, port); (void)inb(port); id = inb(port + 1) & 0x1F; if ((id != C168_ASIC_ID) && (id != C104_ASIC_ID) && (id != C102_ASIC_ID) && (id != CI132_ASIC_ID) && (id != CI134_ASIC_ID) && (id != CI104J_ASIC_ID)) return -1; for (i = 0, j = 0; i < 4; i++) { n = inb(port + 2); if (n == 'M') { j = 1; } else if ((j == 1) && (n == 1)) { j = 2; break; } else j = 0; } if (j != 2) id = -2; return id; } static void __init mxser_normal_mode(int port) { int i, n; outb(0xA5, port + 1); outb(0x80, port + 3); outb(12, port + 0); /* 9600 bps */ outb(0, port + 1); outb(0x03, port + 3); /* 8 data bits */ outb(0x13, port + 4); /* loop back mode */ for (i = 0; i < 16; i++) { n = inb(port + 5); if ((n & 0x61) == 0x60) break; if ((n & 1) == 1) (void)inb(port); } outb(0x00, port + 4); } #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */ #define CHIP_DO 0x02 /* Serial Data Output in Eprom */ #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */ #define CHIP_DI 0x08 /* Serial Data Input in Eprom */ #define EN_CCMD 0x000 /* Chip's command register */ #define EN0_RSARLO 0x008 /* Remote start address reg 0 */ #define EN0_RSARHI 0x009 /* Remote start address reg 1 */ #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */ #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */ #define EN0_DCFG 0x00E /* Data configuration reg WR */ #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */ #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */ #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */ static int __init mxser_read_register(int port, unsigned short *regs) { int i, k, value, id; unsigned int j; id = mxser_program_mode(port); if (id < 0) return id; for (i = 0; i < 14; i++) { k = (i & 0x3F) | 0x180; for (j = 0x100; j > 0; j >>= 1) { outb(CHIP_CS, port); if (k & j) { outb(CHIP_CS | CHIP_DO, port); outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */ } else { outb(CHIP_CS, port); outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */ } } (void)inb(port); value = 0; for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) { outb(CHIP_CS, port); outb(CHIP_CS | CHIP_SK, port); if (inb(port) & CHIP_DI) value |= j; } regs[i] = value; outb(0, port); } mxser_normal_mode(port); return id; } static int mxser_ioctl_special(unsigned int cmd, void __user *argp) { struct mxser_port *port; int result, status; unsigned int i, j; switch (cmd) { case MOXA_GET_CONF: /* if (copy_to_user(argp, mxsercfg, sizeof(struct mxser_hwconf) * 4)) return -EFAULT; return 0;*/ return -ENXIO; case MOXA_GET_MAJOR: if (copy_to_user(argp, &ttymajor, sizeof(int))) return -EFAULT; return 0; case MOXA_GET_CUMAJOR: if (copy_to_user(argp, &calloutmajor, sizeof(int))) return -EFAULT; return 0; case MOXA_CHKPORTENABLE: result = 0; for (i = 0; i < MXSER_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: if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log))) return -EFAULT; return 0; case MOXA_GETMSTATUS: for (i = 0; i < MXSER_BOARDS; i++) for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) { port = &mxser_boards[i].ports[j]; GMStatus[i].ri = 0; if (!port->ioaddr) { GMStatus[i].dcd = 0; GMStatus[i].dsr = 0; GMStatus[i].cts = 0; continue; } if (!port->tty || !port->tty->termios) GMStatus[i].cflag = port->normal_termios.c_cflag; else GMStatus[i].cflag = port->tty->termios->c_cflag; status = inb(port->ioaddr + UART_MSR); if (status & 0x80 /*UART_MSR_DCD */ ) GMStatus[i].dcd = 1; else GMStatus[i].dcd = 0; if (status & 0x20 /*UART_MSR_DSR */ ) GMStatus[i].dsr = 1; else GMStatus[i].dsr = 0; if (status & 0x10 /*UART_MSR_CTS */ ) GMStatus[i].cts = 1; else GMStatus[i].cts = 0; } if (copy_to_user(argp, GMStatus, sizeof(struct mxser_mstatus) * MXSER_PORTS)) return -EFAULT; return 0; case MOXA_ASPP_MON_EXT: { int p, shiftbit; unsigned long opmode; unsigned cflag, iflag; for (i = 0; i < MXSER_BOARDS; i++) for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) { port = &mxser_boards[i].ports[j]; if (!port->ioaddr) continue; status = mxser_get_msr(port->ioaddr, 0, i); if (status & UART_MSR_TERI) port->icount.rng++; if (status & UART_MSR_DDSR) port->icount.dsr++; if (status & UART_MSR_DDCD) port->icount.dcd++; if (status & UART_MSR_DCTS) port->icount.cts++; port->mon_data.modem_status = status; mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt; mon_data_ext.tx_cnt[i] = port->mon_data.txcnt; mon_data_ext.up_rxcnt[i] = port->mon_data.up_rxcnt; mon_data_ext.up_txcnt[i] = port->mon_data.up_txcnt; mon_data_ext.modem_status[i] = port->mon_data.modem_status; mon_data_ext.baudrate[i] = port->realbaud; if (!port->tty || !port->tty->termios) { cflag = port->normal_termios.c_cflag; iflag = port->normal_termios.c_iflag; } else { cflag = port->tty->termios->c_cflag; iflag = port->tty->termios->c_iflag; } mon_data_ext.databits[i] = cflag & CSIZE; mon_data_ext.stopbits[i] = cflag & CSTOPB; mon_data_ext.parity[i] = cflag & (PARENB | PARODD | CMSPAR); mon_data_ext.flowctrl[i] = 0x00; if (cflag & CRTSCTS) mon_data_ext.flowctrl[i] |= 0x03; if (iflag & (IXON | IXOFF)) mon_data_ext.flowctrl[i] |= 0x0C; if (port->type == PORT_16550A) mon_data_ext.fifo[i] = 1; else mon_data_ext.fifo[i] = 0; p = i % 4; shiftbit = p * 2; opmode = inb(port->opmode_ioaddr) >> shiftbit; opmode &= OP_MODE_MASK; mon_data_ext.iftype[i] = opmode; } if (copy_to_user(argp, &mon_data_ext, sizeof(mon_data_ext))) return -EFAULT; return 0; } default: return -ENOIOCTLCMD; } return 0; } static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) { struct mxser_port *info = tty->driver_data; struct async_icount cprev, cnow; /* kernel counter temps */ struct serial_icounter_struct __user *p_cuser; unsigned long templ; unsigned long flags; unsigned int i; 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; val = inb(info->opmode_ioaddr); val &= mask; val |= (opmode << shiftbit); outb(val, info->opmode_ioaddr); } else { shiftbit = p * 2; opmode = inb(info->opmode_ioaddr) >> shiftbit; opmode &= OP_MODE_MASK; if (copy_to_user(argp, &opmode, sizeof(int))) return -EFAULT; } return 0; } if (cmd == MOXA_SET_SPECIAL_BAUD_RATE) { int speed; if (get_user(speed, (int __user *)argp)) return -EFAULT; if (speed <= 0 || speed > info->max_baud) return -EFAULT; if (!info->tty || !info->tty->termios || !info->ioaddr) return 0; info->tty->termios->c_cflag &= ~(CBAUD | CBAUDEX); for (i = 0; i < BAUD_TABLE_NO; i++) if (speed == mxvar_baud_table[i]) break; if (i == BAUD_TABLE_NO) { info->tty->termios->c_cflag |= B_SPEC; } else if (speed != 0) info->tty->termios->c_cflag |= mxvar_baud_table1[i]; info->speed = speed; spin_lock_irqsave(&info->slock, flags); mxser_change_speed(info, NULL); spin_unlock_irqrestore(&info->slock, flags); return 0; } else if (cmd == MOXA_GET_SPECIAL_BAUD_RATE) { if (copy_to_user(argp, &info->speed, sizeof(int))) return -EFAULT; return 0; } if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT && test_bit(TTY_IO_ERROR, &tty->flags)) return -EIO; switch (cmd) { case TCSBRK: /* SVID version: non-zero arg --> no break */ retval = tty_check_change(tty); if (retval) return retval; tty_wait_until_sent(tty, 0); if (!arg) mxser_send_break(info, HZ / 4); /* 1/4 second */ return 0; case TCSBRKP: /* support for POSIX tcsendbreak() */ retval = tty_check_change(tty); if (retval) return retval; tty_wait_until_sent(tty, 0); mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4); return 0; case TIOCGSOFTCAR: return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp); case TIOCSSOFTCAR: if (get_user(templ, (unsigned long __user *) argp)) return -EFAULT; arg = templ; tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0)); return 0; case TIOCGSERIAL: return mxser_get_serial_info(info, argp); case TIOCSSERIAL: return mxser_set_serial_info(info, argp); case TIOCSERGETLSR: /* Get line status register */ return mxser_get_lsr_info(info, argp); /* * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change * - mask passed in arg for lines of interest * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking) * Caller should use TIOCGICOUNT to see which one it was */ case TIOCMIWAIT: spin_lock_irqsave(&info->slock, flags); cnow = info->icount; /* note the counters on entry */ spin_unlock_irqrestore(&info->slock, flags); wait_event_interruptible(info->delta_msr_wait, ({ cprev = cnow; spin_lock_irqsave(&info->slock, flags); cnow = info->icount; /* atomic copy */ spin_unlock_irqrestore(&info->slock, flags); ((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)); })); break; /* * Get counter of input serial line interrupts (DCD,RI,DSR,CTS) * Return: write counters to the user passed counter struct * NB: both 1->0 and 0->1 transitions are counted except for * RI where only 0->1 is counted. */ case TIOCGICOUNT: spin_lock_irqsave(&info->slock, flags); cnow = info->icount; spin_unlock_irqrestore(&info->slock, flags); p_cuser = argp; if (put_user(cnow.frame, &p_cuser->frame)) return -EFAULT; if (put_user(cnow.brk, &p_cuser->brk)) return -EFAULT; if (put_user(cnow.overrun, &p_cuser->overrun)) return -EFAULT; if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun)) return -EFAULT; if (put_user(cnow.parity, &p_cuser->parity)) return -EFAULT; if (put_user(cnow.rx, &p_cuser->rx)) return -EFAULT; if (put_user(cnow.tx, &p_cuser->tx)) return -EFAULT; put_user(cnow.cts, &p_cuser->cts); put_user(cnow.dsr, &p_cuser->dsr); put_user(cnow.rng, &p_cuser->rng); put_user(cnow.dcd, &p_cuser->dcd); return 0; case MOXA_HighSpeedOn: return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp); case MOXA_SDS_RSTICOUNTER: info->mon_data.rxcnt = 0; info->mon_data.txcnt = 0; return 0; case MOXA_ASPP_SETBAUD:{ long baud; if (get_user(baud, (long __user *)argp)) return -EFAULT; spin_lock_irqsave(&info->slock, flags); mxser_set_baud(info, baud); spin_unlock_irqrestore(&info->slock, flags); return 0; } case MOXA_ASPP_GETBAUD: if (copy_to_user(argp, &info->realbaud, sizeof(long))) return -EFAULT; return 0; case MOXA_ASPP_OQUEUE:{ int len, lsr; len = mxser_chars_in_buffer(tty); lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT; len += (lsr ? 0 : 1); if (copy_to_user(argp, &len, sizeof(int))) return -EFAULT; return 0; } case MOXA_ASPP_MON: { int mcr, status; status = mxser_get_msr(info->ioaddr, 1, tty->index); mxser_check_modem_status(info, status); mcr = inb(info->ioaddr + UART_MCR); if (mcr & MOXA_MUST_MCR_XON_FLAG) info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD; else info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD; if (mcr & MOXA_MUST_MCR_TX_XON) info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT; else info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT; if (info->tty->hw_stopped) info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD; else info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD; if (copy_to_user(argp, &info->mon_data, sizeof(struct mxser_mon))) return -EFAULT; return 0; } case MOXA_ASPP_LSTATUS: { if (copy_to_user(argp, &info->err_shadow, sizeof(unsigned char))) return -EFAULT; info->err_shadow = 0; return 0; } case MOXA_SET_BAUD_METHOD: { int method; if (get_user(method, (int __user *)argp)) return -EFAULT; mxser_set_baud_method[tty->index] = method; if (copy_to_user(argp, &method, sizeof(int))) return -EFAULT; return 0; } default: return -ENOIOCTLCMD; } return 0; } static void mxser_stoprx(struct tty_struct *tty) { struct mxser_port *info = tty->driver_data; info->ldisc_stop_rx = 1; if (I_IXOFF(tty)) { if (info->board->chip_flag) { info->IER &= ~MOXA_MUST_RECV_ISR; outb(info->IER, info->ioaddr + UART_IER); } else { info->x_char = STOP_CHAR(tty); outb(0, info->ioaddr + UART_IER); info->IER |= UART_IER_THRI; outb(info->IER, info->ioaddr + UART_IER); } } if (info->tty->termios->c_cflag & CRTSCTS) { info->MCR &= ~UART_MCR_RTS; outb(info->MCR, info->ioaddr + UART_MCR); } } /* * This routine is called by the upper-layer tty layer to signal that * incoming characters should be throttled. */ static void mxser_throttle(struct tty_struct *tty) { mxser_stoprx(tty); } static void mxser_unthrottle(struct tty_struct *tty) { struct mxser_port *info = tty->driver_data; /* startrx */ info->ldisc_stop_rx = 0; if (I_IXOFF(tty)) { if (info->x_char) info->x_char = 0; else { if (info->board->chip_flag) { info->IER |= MOXA_MUST_RECV_ISR; outb(info->IER, info->ioaddr + UART_IER); } else { info->x_char = START_CHAR(tty); outb(0, info->ioaddr + UART_IER); info->IER |= UART_IER_THRI; outb(info->IER, info->ioaddr + UART_IER); } } } if (info->tty->termios->c_cflag & CRTSCTS) { info->MCR |= UART_MCR_RTS; outb(info->MCR, info->ioaddr + UART_MCR); } } /* * mxser_stop() and mxser_start() * * This routines are called before setting or resetting tty->stopped. * They enable or disable transmitter interrupts, as necessary. */ static void mxser_stop(struct tty_struct *tty) { struct mxser_port *info = tty->driver_data; unsigned long flags; spin_lock_irqsave(&info->slock, flags); if (info->IER & UART_IER_THRI) { info->IER &= ~UART_IER_THRI; outb(info->IER, info->ioaddr + UART_IER); } spin_unlock_irqrestore(&info->slock, flags); } static void mxser_start(struct tty_struct *tty) { struct mxser_port *info = tty->driver_data; unsigned long flags; spin_lock_irqsave(&info->slock, flags); if (info->xmit_cnt && info->xmit_buf) { outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER); info->IER |= UART_IER_THRI; outb(info->IER, info->ioaddr + UART_IER); } spin_unlock_irqrestore(&info->slock, flags); } static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios) { struct mxser_port *info = tty->driver_data; unsigned long flags; spin_lock_irqsave(&info->slock, flags); mxser_change_speed(info, old_termios); spin_unlock_irqrestore(&info->slock, flags); if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios->c_cflag & CRTSCTS)) { tty->hw_stopped = 0; mxser_start(tty); } /* Handle sw stopped */ if ((old_termios->c_iflag & IXON) && !(tty->termios->c_iflag & IXON)) { tty->stopped = 0; if (info->board->chip_flag) { spin_lock_irqsave(&info->slock, flags); DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr); spin_unlock_irqrestore(&info->slock, flags); } mxser_start(tty); } } /* * mxser_wait_until_sent() --- wait until the transmitter is empty */ static void mxser_wait_until_sent(struct tty_struct *tty, int timeout) { struct mxser_port *info = tty->driver_data; unsigned long orig_jiffies, char_time; int lsr; if (info->type == PORT_UNKNOWN) return; if (info->xmit_fifo_size == 0) return; /* Just in case.... */ orig_jiffies = jiffies; /* * Set the check interval to be 1/5 of the estimated time to * send a single character, and make it at least 1. The check * interval should also be less than the timeout. * * Note: we have to use pretty tight timings here to satisfy * the NIST-PCTS. */ char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size; char_time = char_time / 5; if (char_time == 0) char_time = 1; if (timeout && timeout < char_time) char_time = timeout; /* * If the transmitter hasn't cleared in twice the approximate * amount of time to send the entire FIFO, it probably won't * ever clear. This assumes the UART isn't doing flow * control, which is currently the case. Hence, if it ever * takes longer than info->timeout, this is probably due to a * UART bug of some kind. So, we clamp the timeout parameter at * 2*info->timeout. */ if (!timeout || timeout > 2 * info->timeout) timeout = 2 * info->timeout; #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...", timeout, char_time); printk("jiff=%lu...", jiffies); #endif while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) { #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT printk("lsr = %d (jiff=%lu)...", lsr, jiffies); #endif schedule_timeout_interruptible(char_time); if (signal_pending(current)) break; if (timeout && time_after(jiffies, orig_jiffies + timeout)) break; } set_current_state(TASK_RUNNING); #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies); #endif } /* * This routine is called by tty_hangup() when a hangup is signaled. */ static void mxser_hangup(struct tty_struct *tty) { struct mxser_port *info = tty->driver_data; mxser_flush_buffer(tty); mxser_shutdown(info); info->event = 0; info->count = 0; info->flags &= ~ASYNC_NORMAL_ACTIVE; info->tty = NULL; wake_up_interruptible(&info->open_wait); } /* * mxser_rs_break() --- routine which turns the break handling on or off */ static void mxser_rs_break(struct tty_struct *tty, int break_state) { struct mxser_port *info = tty->driver_data; unsigned long flags; spin_lock_irqsave(&info->slock, flags); if (break_state == -1) outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC, info->ioaddr + UART_LCR); else outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC, info->ioaddr + UART_LCR); spin_unlock_irqrestore(&info->slock, flags); } static void mxser_receive_chars(struct mxser_port *port, int *status) { struct tty_struct *tty = port->tty; unsigned char ch, gdl; int ignored = 0; int cnt = 0; int recv_room; int max = 256; recv_room = tty->receive_room; if ((recv_room == 0) && (!port->ldisc_stop_rx)) mxser_stoprx(tty); if (port->board->chip_flag != MOXA_OTHER_UART) { if (*status & UART_LSR_SPECIAL) goto intr_old; if (port->board->chip_flag == MOXA_MUST_MU860_HWID && (*status & MOXA_MUST_LSR_RERR)) goto intr_old; if (*status & MOXA_MUST_LSR_RERR) goto intr_old; gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER); if (port->board->chip_flag == MOXA_MUST_MU150_HWID) gdl &= MOXA_MUST_GDL_MASK; if (gdl >= recv_room) { if (!port->ldisc_stop_rx) mxser_stoprx(tty); } while (gdl--) { ch = inb(port->ioaddr + UART_RX); tty_insert_flip_char(tty, ch, 0); cnt++; } goto end_intr; } intr_old: do { if (max-- < 0) break; ch = inb(port->ioaddr + UART_RX); if (port->board->chip_flag && (*status & UART_LSR_OE)) outb(0x23, port->ioaddr + UART_FCR); *status &= port->read_status_mask; if (*status & port->ignore_status_mask) { if (++ignored > 100) break; } else { char flag = 0; if (*status & UART_LSR_SPECIAL) { if (*status & UART_LSR_BI) { flag = TTY_BREAK; port->icount.brk++; if (port->flags & ASYNC_SAK) do_SAK(tty); } else if (*status & UART_LSR_PE) { flag = TTY_PARITY; port->icount.parity++; } else if (*status & UART_LSR_FE) { flag = TTY_FRAME; port->icount.frame++; } else if (*status & UART_LSR_OE) { flag = TTY_OVERRUN; port->icount.overrun++; } else flag = TTY_BREAK; } tty_insert_flip_char(tty, ch, flag); cnt++; if (cnt >= recv_room) { if (!port->ldisc_stop_rx) mxser_stoprx(tty); break; } } if (port->board->chip_flag) break; *status = inb(port->ioaddr + UART_LSR); } while (*status & UART_LSR_DR); end_intr: mxvar_log.rxcnt[port->tty->index] += cnt; port->mon_data.rxcnt += cnt; port->mon_data.up_rxcnt += cnt; /* * We are called from an interrupt context with &port->slock * being held. Drop it temporarily in order to prevent * recursive locking. */ spin_unlock(&port->slock); tty_flip_buffer_push(tty); spin_lock(&port->slock); } static void mxser_transmit_chars(struct mxser_port *port) { int count, cnt; if (port->x_char) { outb(port->x_char, port->ioaddr + UART_TX); port->x_char = 0; mxvar_log.txcnt[port->tty->index]++; port->mon_data.txcnt++; port->mon_data.up_txcnt++; port->icount.tx++; return; } if (port->xmit_buf == 0) return; if ((port->xmit_cnt <= 0) || port->tty->stopped || (port->tty->hw_stopped && (port->type != PORT_16550A) && (!port->board->chip_flag))) { port->IER &= ~UART_IER_THRI; outb(port->IER, port->ioaddr + UART_IER); return; } cnt = port->xmit_cnt; count = port->xmit_fifo_size; do { outb(port->xmit_buf[port->xmit_tail++], port->ioaddr + UART_TX); port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1); if (--port->xmit_cnt <= 0) break; } while (--count > 0); mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt); port->mon_data.txcnt += (cnt - port->xmit_cnt); port->mon_data.up_txcnt += (cnt - port->xmit_cnt); port->icount.tx += (cnt - port->xmit_cnt); if (port->xmit_cnt < WAKEUP_CHARS) tty_wakeup(port->tty); if (port->xmit_cnt <= 0) { port->IER &= ~UART_IER_THRI; outb(port->IER, port->ioaddr + UART_IER); } } /* * This is the serial driver's generic interrupt routine */ static irqreturn_t mxser_interrupt(int irq, void *dev_id) { int status, iir, i; struct mxser_board *brd = NULL; struct mxser_port *port; int max, irqbits, bits, msr; unsigned int int_cnt, pass_counter = 0; int handled = IRQ_NONE; for (i = 0; i < MXSER_BOARDS; i++) if (dev_id == &mxser_boards[i]) { brd = dev_id; break; } if (i == MXSER_BOARDS) goto irq_stop; if (brd == NULL) goto irq_stop; max = brd->info->nports; while (pass_counter++ < MXSER_ISR_PASS_LIMIT) { irqbits = inb(brd->vector) & brd->vector_mask; if (irqbits == brd->vector_mask) break; handled = IRQ_HANDLED; for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) { if (irqbits == brd->vector_mask) break; if (bits & irqbits) continue; port = &brd->ports[i]; int_cnt = 0; spin_lock(&port->slock); do { iir = inb(port->ioaddr + UART_IIR); if (iir & UART_IIR_NO_INT) break; iir &= MOXA_MUST_IIR_MASK; if (!port->tty || (port->flags & ASYNC_CLOSING) || !(port->flags & ASYNC_INITIALIZED)) { status = inb(port->ioaddr + UART_LSR); outb(0x27, port->ioaddr + UART_FCR); inb(port->ioaddr + UART_MSR); break; } status = inb(port->ioaddr + UART_LSR); if (status & UART_LSR_PE) port->err_shadow |= NPPI_NOTIFY_PARITY; if (status & UART_LSR_FE) port->err_shadow |= NPPI_NOTIFY_FRAMING; if (status & UART_LSR_OE) port->err_shadow |= NPPI_NOTIFY_HW_OVERRUN; if (status & UART_LSR_BI) port->err_shadow |= NPPI_NOTIFY_BREAK; if (port->board->chip_flag) { if (iir == MOXA_MUST_IIR_GDA || iir == MOXA_MUST_IIR_RDA || iir == MOXA_MUST_IIR_RTO || iir == MOXA_MUST_IIR_LSR) mxser_receive_chars(port, &status); } else { status &= port->read_status_mask; if (status & UART_LSR_DR) mxser_receive_chars(port, &status); } msr = inb(port->ioaddr + UART_MSR); if (msr & UART_MSR_ANY_DELTA) mxser_check_modem_status(port, msr); if (port->board->chip_flag) { if (iir == 0x02 && (status & UART_LSR_THRE)) mxser_transmit_chars(port); } else { if (status & UART_LSR_THRE) mxser_transmit_chars(port); } } while (int_cnt++ < MXSER_ISR_PASS_LIMIT); spin_unlock(&port->slock); } } irq_stop: return handled; } static const struct tty_operations mxser_ops = { .open = mxser_open, .close = mxser_close, .write = mxser_write, .put_char = mxser_put_char, .flush_chars = mxser_flush_chars, .write_room = mxser_write_room, .chars_in_buffer = mxser_chars_in_buffer, .flush_buffer = mxser_flush_buffer, .ioctl = mxser_ioctl, .throttle = mxser_throttle, .unthrottle = mxser_unthrottle, .set_termios = mxser_set_termios, .stop = mxser_stop, .start = mxser_start, .hangup = mxser_hangup, .break_ctl = mxser_rs_break, .wait_until_sent = mxser_wait_until_sent, .tiocmget = mxser_tiocmget, .tiocmset = mxser_tiocmset, }; /* * The MOXA Smartio/Industio serial driver boot-time initialization code! */ static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev, unsigned int irq) { if (irq) free_irq(brd->irq, brd); if (pdev != NULL) { /* PCI */ #ifdef CONFIG_PCI pci_release_region(pdev, 2); pci_release_region(pdev, 3); #endif } else { release_region(brd->ports[0].ioaddr, 8 * brd->info->nports); release_region(brd->vector, 1); } } static int __devinit mxser_initbrd(struct mxser_board *brd, struct pci_dev *pdev) { struct mxser_port *info; unsigned int i; int retval; printk(KERN_INFO "max. baud rate = %d bps.\n", brd->ports[0].max_baud); for (i = 0; i < brd->info->nports; i++) { info = &brd->ports[i]; info->board = brd; info->stop_rx = 0; info->ldisc_stop_rx = 0; /* Enhance mode enabled here */ if (brd->chip_flag != MOXA_OTHER_UART) ENABLE_MOXA_MUST_ENCHANCE_MODE(info->ioaddr); info->flags = ASYNC_SHARE_IRQ; info->type = brd->uart_type; process_txrx_fifo(info); info->custom_divisor = info->baud_base * 16; info->close_delay = 5 * HZ / 10; info->closing_wait = 30 * HZ; info->normal_termios = mxvar_sdriver->init_termios; init_waitqueue_head(&info->open_wait); init_waitqueue_head(&info->delta_msr_wait); info->speed = 9600; memset(&info->mon_data, 0, sizeof(struct mxser_mon)); info->err_shadow = 0; spin_lock_init(&info->slock); /* before set INT ISR, disable all int */ outb(inb(info->ioaddr + UART_IER) & 0xf0, info->ioaddr + UART_IER); } retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser", brd); if (retval) { printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may " "conflict with another device.\n", brd->info->name, brd->irq); /* We hold resources, we need to release them. */ mxser_release_res(brd, pdev, 0); } return retval; } static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd) { int id, i, bits; unsigned short regs[16], irq; unsigned char scratch, scratch2; brd->chip_flag = MOXA_OTHER_UART; id = mxser_read_register(cap, regs); switch (id) { case C168_ASIC_ID: brd->info = &mxser_cards[0]; break; case C104_ASIC_ID: brd->info = &mxser_cards[1]; break; case CI104J_ASIC_ID: brd->info = &mxser_cards[2]; break; case C102_ASIC_ID: brd->info = &mxser_cards[5]; break; case CI132_ASIC_ID: brd->info = &mxser_cards[6]; break; case CI134_ASIC_ID: brd->info = &mxser_cards[7]; break; default: return 0; } irq = 0; /* some ISA cards have 2 ports, but we want to see them as 4-port (why?) Flag-hack checks if configuration should be read as 2-port here. */ if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) { irq = regs[9] & 0xF000; irq = irq | (irq >> 4); if (irq != (regs[9] & 0xFF00)) return MXSER_ERR_IRQ_CONFLIT; } else if (brd->info->nports == 4) { irq = regs[9] & 0xF000; irq = irq | (irq >> 4); irq = irq | (irq >> 8); if (irq != regs[9]) return MXSER_ERR_IRQ_CONFLIT; } else if (brd->info->nports == 8) { irq = regs[9] & 0xF000; irq = irq | (irq >> 4); irq = irq | (irq >> 8); if ((irq != regs[9]) || (irq != regs[10])) return MXSER_ERR_IRQ_CONFLIT; } if (!irq) return MXSER_ERR_IRQ; brd->irq = ((int)(irq & 0xF000) >> 12); for (i = 0; i < 8; i++) brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8; if ((regs[12] & 0x80) == 0) return MXSER_ERR_VECTOR; brd->vector = (int)regs[11]; /* interrupt vector */ if (id == 1) brd->vector_mask = 0x00FF; else brd->vector_mask = 0x000F; for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) { if (regs[12] & bits) { brd->ports[i].baud_base = 921600; brd->ports[i].max_baud = 921600; } else { brd->ports[i].baud_base = 115200; brd->ports[i].max_baud = 115200; } } scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB); outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR); outb(0, cap + UART_EFR); /* EFR is the same as FCR */ outb(scratch2, cap + UART_LCR); outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR); scratch = inb(cap + UART_IIR); if (scratch & 0xC0) brd->uart_type = PORT_16550A; else brd->uart_type = PORT_16450; if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports, "mxser(IO)")) return MXSER_ERR_IOADDR; if (!request_region(brd->vector, 1, "mxser(vector)")) { release_region(brd->ports[0].ioaddr, 8 * brd->info->nports); return MXSER_ERR_VECTOR; } return brd->info->nports; } static int __devinit mxser_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { #ifdef CONFIG_PCI struct mxser_board *brd; unsigned int i, j; unsigned long ioaddress; int retval = -EINVAL; for (i = 0; i < MXSER_BOARDS; i++) if (mxser_boards[i].info == NULL) break; if (i >= MXSER_BOARDS) { printk(KERN_ERR "Too many Smartio/Industio family boards found " "(maximum %d), board not configured\n", MXSER_BOARDS); goto err; } brd = &mxser_boards[i]; brd->idx = i * MXSER_PORTS_PER_BOARD; printk(KERN_INFO "Found MOXA %s board (BusNo=%d, DevNo=%d)\n", mxser_cards[ent->driver_data].name, pdev->bus->number, PCI_SLOT(pdev->devfn)); retval = pci_enable_device(pdev); if (retval) { printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n"); goto err; } /* io address */ ioaddress = pci_resource_start(pdev, 2); retval = pci_request_region(pdev, 2, "mxser(IO)"); if (retval) goto err; brd->info = &mxser_cards[ent->driver_data]; for (i = 0; i < brd->info->nports; i++) brd->ports[i].ioaddr = ioaddress + 8 * i; /* vector */ ioaddress = pci_resource_start(pdev, 3); retval = pci_request_region(pdev, 3, "mxser(vector)"); if (retval) goto err_relio; brd->vector = ioaddress; /* irq */ brd->irq = pdev->irq; brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr); brd->uart_type = PORT_16550A; brd->vector_mask = 0; for (i = 0; i < brd->info->nports; i++) { for (j = 0; j < UART_INFO_NUM; j++) { if (Gpci_uart_info[j].type == brd->chip_flag) { brd->ports[i].max_baud = Gpci_uart_info[j].max_baud; /* exception....CP-102 */ if (brd->info->flags & MXSER_HIGHBAUD) brd->ports[i].max_baud = 921600; break; } } } if (brd->chip_flag == MOXA_MUST_MU860_HWID) { for (i = 0; i < brd->info->nports; i++) { if (i < 4) brd->ports[i].opmode_ioaddr = ioaddress + 4; else brd->ports[i].opmode_ioaddr = ioaddress + 0x0c; } outb(0, ioaddress + 4); /* default set to RS232 mode */ outb(0, ioaddress + 0x0c); /* default set to RS232 mode */ } for (i = 0; i < brd->info->nports; i++) { brd->vector_mask |= (1 << i); brd->ports[i].baud_base = 921600; } /* mxser_initbrd will hook ISR. */ retval = mxser_initbrd(brd, pdev); if (retval) goto err_null; for (i = 0; i < brd->info->nports; i++) tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev); pci_set_drvdata(pdev, brd); return 0; err_relio: pci_release_region(pdev, 2); err_null: brd->info = NULL; err: return retval; #else return -ENODEV; #endif } static void __devexit mxser_remove(struct pci_dev *pdev) { struct mxser_board *brd = pci_get_drvdata(pdev); unsigned int i; for (i = 0; i < brd->info->nports; i++) tty_unregister_device(mxvar_sdriver, brd->idx + i); mxser_release_res(brd, pdev, 1); brd->info = NULL; } static struct pci_driver mxser_driver = { .name = "mxser", .id_table = mxser_pcibrds, .probe = mxser_probe, .remove = __devexit_p(mxser_remove) }; static int __init mxser_module_init(void) { struct mxser_board *brd; unsigned long cap; unsigned int i, m, isaloop; int retval, b; pr_debug("Loading module mxser ...\n"); mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1); if (!mxvar_sdriver) return -ENOMEM; printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n", MXSER_VERSION); /* Initialize the tty_driver structure */ mxvar_sdriver->owner = THIS_MODULE; mxvar_sdriver->magic = TTY_DRIVER_MAGIC; mxvar_sdriver->name = "ttyMI"; mxvar_sdriver->major = ttymajor; mxvar_sdriver->minor_start = 0; mxvar_sdriver->num = MXSER_PORTS + 1; mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL; mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL; mxvar_sdriver->init_termios = tty_std_termios; mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL; mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV; tty_set_operations(mxvar_sdriver, &mxser_ops); retval = tty_register_driver(mxvar_sdriver); if (retval) { printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family " "tty driver !\n"); goto err_put; } mxvar_diagflag = 0; m = 0; /* Start finding ISA boards here */ for (isaloop = 0; isaloop < 2; isaloop++) for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) { if (!isaloop) cap = mxserBoardCAP[b]; /* predefined */ else cap = ioaddr[b]; /* module param */ if (!cap) continue; brd = &mxser_boards[m]; retval = mxser_get_ISA_conf(cap, brd); if (retval != 0) printk(KERN_INFO "Found MOXA %s board " "(CAP=0x%x)\n", brd->info->name, ioaddr[b]); if (retval <= 0) { if (retval == MXSER_ERR_IRQ) printk(KERN_ERR "Invalid interrupt " "number, board not " "configured\n"); else if (retval == MXSER_ERR_IRQ_CONFLIT) printk(KERN_ERR "Invalid interrupt " "number, board not " "configured\n"); else if (retval == MXSER_ERR_VECTOR) printk(KERN_ERR "Invalid interrupt " "vector, board not " "configured\n"); else if (retval == MXSER_ERR_IOADDR) printk(KERN_ERR "Invalid I/O address, " "board not configured\n"); brd->info = NULL; continue; } /* mxser_initbrd will hook ISR. */ if (mxser_initbrd(brd, NULL) < 0) { brd->info = NULL; continue; } brd->idx = m * MXSER_PORTS_PER_BOARD; for (i = 0; i < brd->info->nports; i++) tty_register_device(mxvar_sdriver, brd->idx + i, NULL); m++; } retval = pci_register_driver(&mxser_driver); if (retval) { printk(KERN_ERR "Can't register pci driver\n"); if (!m) { retval = -ENODEV; goto err_unr; } /* else: we have some ISA cards under control */ } pr_debug("Done.\n"); return 0; err_unr: tty_unregister_driver(mxvar_sdriver); err_put: put_tty_driver(mxvar_sdriver); return retval; } static void __exit mxser_module_exit(void) { unsigned int i, j; pr_debug("Unloading module mxser ...\n"); pci_unregister_driver(&mxser_driver); for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */ if (mxser_boards[i].info != NULL) for (j = 0; j < mxser_boards[i].info->nports; j++) tty_unregister_device(mxvar_sdriver, mxser_boards[i].idx + j); tty_unregister_driver(mxvar_sdriver); put_tty_driver(mxvar_sdriver); for (i = 0; i < MXSER_BOARDS; i++) if (mxser_boards[i].info != NULL) mxser_release_res(&mxser_boards[i], NULL, 1); pr_debug("Done.\n"); } module_init(mxser_module_init); module_exit(mxser_module_exit);