| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jiri Slaby | 8638 | 58.93% | 21 | 22.34% |
| Alan Cox | 2992 | 20.41% | 25 | 26.60% |
| Linus Torvalds (pre-git) | 1363 | 9.30% | 1 | 1.06% |
| Christoph Hellwig | 943 | 6.43% | 1 | 1.06% |
| Alexey Khoroshilov | 207 | 1.41% | 2 | 2.13% |
| Al Viro | 182 | 1.24% | 5 | 5.32% |
| Peter Hurley | 74 | 0.50% | 6 | 6.38% |
| Adrian Bunk | 59 | 0.40% | 1 | 1.06% |
| Matwey V. Kornilov | 33 | 0.23% | 2 | 2.13% |
| Dave Jones | 30 | 0.20% | 1 | 1.06% |
| Linus Torvalds | 26 | 0.18% | 3 | 3.19% |
| Andrew Morton | 21 | 0.14% | 3 | 3.19% |
| Johan Hovold | 15 | 0.10% | 1 | 1.06% |
| Arnaldo Carvalho de Melo | 11 | 0.08% | 1 | 1.06% |
| Rakib Mullick | 10 | 0.07% | 1 | 1.06% |
| Kirill Smelkov | 8 | 0.05% | 2 | 2.13% |
| Rusty Russell | 8 | 0.05% | 1 | 1.06% |
| David Howells | 6 | 0.04% | 2 | 2.13% |
| Huang Shijie | 4 | 0.03% | 1 | 1.06% |
| Vernon A. Fort | 4 | 0.03% | 1 | 1.06% |
| Manuel Zerpies | 4 | 0.03% | 1 | 1.06% |
| Tejun Heo | 3 | 0.02% | 1 | 1.06% |
| Denys Vlasenko | 3 | 0.02% | 1 | 1.06% |
| Dan Carpenter | 3 | 0.02% | 1 | 1.06% |
| Maximilian Attems | 2 | 0.01% | 1 | 1.06% |
| Greg Kroah-Hartman | 2 | 0.01% | 2 | 2.13% |
| Aya Mahfouz | 1 | 0.01% | 1 | 1.06% |
| Jesper Juhl | 1 | 0.01% | 1 | 1.06% |
| H Hartley Sweeten | 1 | 0.01% | 1 | 1.06% |
| Arvind Yadav | 1 | 0.01% | 1 | 1.06% |
| Randy Dunlap | 1 | 0.01% | 1 | 1.06% |
| Bill Pemberton | 1 | 0.01% | 1 | 1.06% |
| Total | 14657 | 94 |
// 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 *ss) { struct mxser_port *info = tty->driver_data; struct tty_port *port = &info->port; if (tty->index == MXSER_PORTS) return -ENOTTY; mutex_lock(&port->mutex); ss->type = info->type, ss->line = tty->index, ss->port = info->ioaddr, ss->irq = info->board->irq, ss->flags = info->port.flags, ss->baud_base = info->baud_base, ss->close_delay = info->port.close_delay, ss->closing_wait = info->port.closing_wait, ss->custom_divisor = info->custom_divisor, mutex_unlock(&port->mutex); return 0; } static int mxser_set_serial_info(struct tty_struct *tty, struct serial_struct *ss) { struct mxser_port *info = tty->driver_data; struct tty_port *port = &info->port; speed_t baud; unsigned long sl_flags; unsigned int flags; int retval = 0; if (tty->index == MXSER_PORTS) return -ENOTTY; if (tty_io_error(tty)) return -EIO; mutex_lock(&port->mutex); if (!info->ioaddr) { mutex_unlock(&port->mutex); return -ENODEV; } if (ss->irq != info->board->irq || ss->port != info->ioaddr) { mutex_unlock(&port->mutex); return -EINVAL; } flags = port->flags & ASYNC_SPD_MASK; if (!capable(CAP_SYS_ADMIN)) { if ((ss->baud_base != info->baud_base) || (ss->close_delay != info->port.close_delay) || ((ss->flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK))) { mutex_unlock(&port->mutex); return -EPERM; } info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) | (ss->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) | (ss->flags & ASYNC_FLAGS)); port->close_delay = ss->close_delay * HZ / 100; port->closing_wait = ss->closing_wait * HZ / 100; port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0; if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST && (ss->baud_base != info->baud_base || ss->custom_divisor != info->custom_divisor)) { if (ss->custom_divisor == 0) { mutex_unlock(&port->mutex); return -EINVAL; } baud = ss->baud_base / ss->custom_divisor; tty_encode_baud_rate(tty, baud, baud); } } info->type = ss->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); } mutex_unlock(&port->mutex); 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 async_icount cnow; unsigned long flags; void __user *argp = (void __user *)arg; 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 != TIOCMIWAIT && tty_io_error(tty)) return -EIO; switch (cmd) { 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, .set_serial = mxser_set_serial_info, .get_serial = mxser_get_serial_info, .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);
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