/*****************************************************************************/ /* * moxa.c -- MOXA Intellio family multiport serial driver. * * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com.tw). * * This code is loosely based on the 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. */ /* * MOXA Intellio Series Driver * for : LINUX * date : 1999/1/7 * version : 5.1 */ #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 #include "moxa.h" #define MOXA_VERSION "5.1k" #define MOXA_FW_HDRLEN 32 #define MOXAMAJOR 172 #define MOXACUMAJOR 173 #define MAX_BOARDS 4 /* Don't change this value */ #define MAX_PORTS_PER_BOARD 32 /* Don't change this value */ #define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD) /* * Define the Moxa PCI vendor and device IDs. */ #define MOXA_BUS_TYPE_ISA 0 #define MOXA_BUS_TYPE_PCI 1 enum { MOXA_BOARD_C218_PCI = 1, MOXA_BOARD_C218_ISA, MOXA_BOARD_C320_PCI, MOXA_BOARD_C320_ISA, MOXA_BOARD_CP204J, }; static char *moxa_brdname[] = { "C218 Turbo PCI series", "C218 Turbo ISA series", "C320 Turbo PCI series", "C320 Turbo ISA series", "CP-204J series", }; #ifdef CONFIG_PCI static struct pci_device_id moxa_pcibrds[] = { { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218), .driver_data = MOXA_BOARD_C218_PCI }, { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320), .driver_data = MOXA_BOARD_C320_PCI }, { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J), .driver_data = MOXA_BOARD_CP204J }, { 0 } }; MODULE_DEVICE_TABLE(pci, moxa_pcibrds); #endif /* CONFIG_PCI */ struct moxa_port; static struct moxa_board_conf { int boardType; int numPorts; int busType; int loadstat; struct moxa_port *ports; void __iomem *basemem; void __iomem *intNdx; void __iomem *intPend; void __iomem *intTable; } moxa_boards[MAX_BOARDS]; struct mxser_mstatus { tcflag_t cflag; int cts; int dsr; int ri; int dcd; }; struct moxaq_str { int inq; int outq; }; struct moxa_port { int type; int port; int close_delay; unsigned short closing_wait; int count; int blocked_open; long event; /* long req'd for set_bit --RR */ int asyncflags; unsigned long statusflags; struct tty_struct *tty; int cflag; wait_queue_head_t open_wait; struct completion close_wait; struct timer_list emptyTimer; char chkPort; char lineCtrl; void __iomem *tableAddr; long curBaud; char DCDState; char lowChkFlag; ushort breakCnt; }; /* statusflags */ #define TXSTOPPED 0x1 #define LOWWAIT 0x2 #define EMPTYWAIT 0x4 #define THROTTLE 0x8 #define SERIAL_DO_RESTART #define WAKEUP_CHARS 256 static int ttymajor = MOXAMAJOR; static int moxaCard; /* Variables for insmod */ #ifdef MODULE static unsigned long baseaddr[MAX_BOARDS]; static unsigned int type[MAX_BOARDS]; static unsigned int numports[MAX_BOARDS]; #endif MODULE_AUTHOR("William Chen"); MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver"); MODULE_LICENSE("GPL"); #ifdef MODULE module_param_array(type, uint, NULL, 0); MODULE_PARM_DESC(type, "card type: C218=2, C320=4"); module_param_array(baseaddr, ulong, NULL, 0); MODULE_PARM_DESC(baseaddr, "base address"); module_param_array(numports, uint, NULL, 0); MODULE_PARM_DESC(numports, "numports (ignored for C218)"); #endif module_param(ttymajor, int, 0); /* * static functions: */ static int moxa_open(struct tty_struct *, struct file *); static void moxa_close(struct tty_struct *, struct file *); static int moxa_write(struct tty_struct *, const unsigned char *, int); static int moxa_write_room(struct tty_struct *); static void moxa_flush_buffer(struct tty_struct *); static int moxa_chars_in_buffer(struct tty_struct *); static void moxa_flush_chars(struct tty_struct *); static void moxa_put_char(struct tty_struct *, unsigned char); static int moxa_ioctl(struct tty_struct *, struct file *, unsigned int, unsigned long); static void moxa_throttle(struct tty_struct *); static void moxa_unthrottle(struct tty_struct *); static void moxa_set_termios(struct tty_struct *, struct ktermios *); static void moxa_stop(struct tty_struct *); static void moxa_start(struct tty_struct *); static void moxa_hangup(struct tty_struct *); static int moxa_tiocmget(struct tty_struct *tty, struct file *file); static int moxa_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear); static void moxa_poll(unsigned long); static void moxa_set_tty_param(struct tty_struct *, struct ktermios *); static int moxa_block_till_ready(struct tty_struct *, struct file *, struct moxa_port *); static void moxa_setup_empty_event(struct tty_struct *); static void moxa_check_xmit_empty(unsigned long); static void moxa_shut_down(struct moxa_port *); static void moxa_receive_data(struct moxa_port *); /* * moxa board interface functions: */ static int MoxaDriverIoctl(unsigned int, unsigned long, int); static int MoxaDriverPoll(void); static int MoxaPortsOfCard(int); static int MoxaPortIsValid(int); static void MoxaPortEnable(int); static void MoxaPortDisable(int); static long MoxaPortGetMaxBaud(int); static long MoxaPortSetBaud(int, long); static int MoxaPortSetTermio(int, struct ktermios *, speed_t); static int MoxaPortGetLineOut(int, int *, int *); static void MoxaPortLineCtrl(int, int, int); static void MoxaPortFlowCtrl(int, int, int, int, int, int); static int MoxaPortLineStatus(int); static int MoxaPortDCDChange(int); static int MoxaPortDCDON(int); static void MoxaPortFlushData(int, int); static int MoxaPortWriteData(int, unsigned char *, int); static int MoxaPortReadData(int, struct tty_struct *tty); static int MoxaPortTxQueue(int); static int MoxaPortRxQueue(int); static int MoxaPortTxFree(int); static void MoxaPortTxDisable(int); static void MoxaPortTxEnable(int); static int MoxaPortResetBrkCnt(int); static void MoxaPortSendBreak(int, int); static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *); static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *); static void MoxaSetFifo(int port, int enable); static const struct tty_operations moxa_ops = { .open = moxa_open, .close = moxa_close, .write = moxa_write, .write_room = moxa_write_room, .flush_buffer = moxa_flush_buffer, .chars_in_buffer = moxa_chars_in_buffer, .flush_chars = moxa_flush_chars, .put_char = moxa_put_char, .ioctl = moxa_ioctl, .throttle = moxa_throttle, .unthrottle = moxa_unthrottle, .set_termios = moxa_set_termios, .stop = moxa_stop, .start = moxa_start, .hangup = moxa_hangup, .tiocmget = moxa_tiocmget, .tiocmset = moxa_tiocmset, }; static struct tty_driver *moxaDriver; static struct moxa_port moxa_ports[MAX_PORTS]; static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0); static DEFINE_SPINLOCK(moxa_lock); static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model) { switch (brd->boardType) { case MOXA_BOARD_C218_ISA: case MOXA_BOARD_C218_PCI: if (model != 1) goto err; break; case MOXA_BOARD_CP204J: if (model != 3) goto err; break; default: if (model != 2) goto err; break; } return 0; err: return -EINVAL; } static int moxa_check_fw(const void *ptr) { const __le16 *lptr = ptr; if (*lptr != cpu_to_le16(0x7980)) return -EINVAL; return 0; } static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf, size_t len) { void __iomem *baseAddr = brd->basemem; u16 tmp; writeb(HW_reset, baseAddr + Control_reg); /* reset */ msleep(10); memset_io(baseAddr, 0, 4096); memcpy_toio(baseAddr, buf, len); /* download BIOS */ writeb(0, baseAddr + Control_reg); /* restart */ msleep(2000); switch (brd->boardType) { case MOXA_BOARD_C218_ISA: case MOXA_BOARD_C218_PCI: tmp = readw(baseAddr + C218_key); if (tmp != C218_KeyCode) goto err; break; case MOXA_BOARD_CP204J: tmp = readw(baseAddr + C218_key); if (tmp != CP204J_KeyCode) goto err; break; default: tmp = readw(baseAddr + C320_key); if (tmp != C320_KeyCode) goto err; tmp = readw(baseAddr + C320_status); if (tmp != STS_init) { printk(KERN_ERR "moxa: bios upload failed -- CPU/Basic " "module not found\n"); return -EIO; } break; } return 0; err: printk(KERN_ERR "moxa: bios upload failed -- board not found\n"); return -EIO; } static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr, size_t len) { void __iomem *baseAddr = brd->basemem; if (len < 7168) { printk(KERN_ERR "moxa: invalid 320 bios -- too short\n"); return -EINVAL; } writew(len - 7168 - 2, baseAddr + C320bapi_len); writeb(1, baseAddr + Control_reg); /* Select Page 1 */ memcpy_toio(baseAddr + DynPage_addr, ptr, 7168); writeb(2, baseAddr + Control_reg); /* Select Page 2 */ memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168); return 0; } static int moxa_load_c218(struct moxa_board_conf *brd, const void *ptr, size_t len) { void __iomem *baseAddr = brd->basemem; const u16 *uptr = ptr; size_t wlen, len2, j; unsigned int i, retry; u16 usum, keycode; if (brd->boardType == MOXA_BOARD_CP204J) keycode = CP204J_KeyCode; else keycode = C218_KeyCode; usum = 0; wlen = len >> 1; for (i = 0; i < wlen; i++) usum += le16_to_cpu(uptr[i]); retry = 0; do { wlen = len >> 1; j = 0; while (wlen) { len2 = (wlen > 2048) ? 2048 : wlen; wlen -= len2; memcpy_toio(baseAddr + C218_LoadBuf, ptr + j, len2 << 1); j += len2 << 1; writew(len2, baseAddr + C218DLoad_len); writew(0, baseAddr + C218_key); for (i = 0; i < 100; i++) { if (readw(baseAddr + C218_key) == keycode) break; msleep(10); } if (readw(baseAddr + C218_key) != keycode) return -EIO; } writew(0, baseAddr + C218DLoad_len); writew(usum, baseAddr + C218check_sum); writew(0, baseAddr + C218_key); for (i = 0; i < 100; i++) { if (readw(baseAddr + C218_key) == keycode) break; msleep(10); } retry++; } while ((readb(baseAddr + C218chksum_ok) != 1) && (retry < 3)); if (readb(baseAddr + C218chksum_ok) != 1) return -EIO; writew(0, baseAddr + C218_key); for (i = 0; i < 100; i++) { if (readw(baseAddr + Magic_no) == Magic_code) break; msleep(10); } if (readw(baseAddr + Magic_no) != Magic_code) return -EIO; writew(1, baseAddr + Disable_IRQ); writew(0, baseAddr + Magic_no); for (i = 0; i < 100; i++) { if (readw(baseAddr + Magic_no) == Magic_code) break; msleep(10); } if (readw(baseAddr + Magic_no) != Magic_code) return -EIO; moxaCard = 1; brd->intNdx = baseAddr + IRQindex; brd->intPend = baseAddr + IRQpending; brd->intTable = baseAddr + IRQtable; return 0; } static int moxa_load_c320(struct moxa_board_conf *brd, const void *ptr, size_t len) { void __iomem *baseAddr = brd->basemem; const u16 *uptr = ptr; size_t wlen, len2, j; unsigned int i, retry; u16 usum; usum = 0; wlen = len >> 1; for (i = 0; i < wlen; i++) usum += le16_to_cpu(uptr[i]); retry = 0; do { wlen = len >> 1; j = 0; while (wlen) { len2 = (wlen > 2048) ? 2048 : wlen; wlen -= len2; memcpy_toio(baseAddr + C320_LoadBuf, ptr + j, len2 << 1); j += len2 << 1; writew(len2, baseAddr + C320DLoad_len); writew(0, baseAddr + C320_key); for (i = 0; i < 10; i++) { if (readw(baseAddr + C320_key) == C320_KeyCode) break; msleep(10); } if (readw(baseAddr + C320_key) != C320_KeyCode) return -EIO; } writew(0, baseAddr + C320DLoad_len); writew(usum, baseAddr + C320check_sum); writew(0, baseAddr + C320_key); for (i = 0; i < 10; i++) { if (readw(baseAddr + C320_key) == C320_KeyCode) break; msleep(10); } retry++; } while ((readb(baseAddr + C320chksum_ok) != 1) && (retry < 3)); if (readb(baseAddr + C320chksum_ok) != 1) return -EIO; writew(0, baseAddr + C320_key); for (i = 0; i < 600; i++) { if (readw(baseAddr + Magic_no) == Magic_code) break; msleep(10); } if (readw(baseAddr + Magic_no) != Magic_code) return -EIO; if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */ writew(0x3800, baseAddr + TMS320_PORT1); writew(0x3900, baseAddr + TMS320_PORT2); writew(28499, baseAddr + TMS320_CLOCK); } else { writew(0x3200, baseAddr + TMS320_PORT1); writew(0x3400, baseAddr + TMS320_PORT2); writew(19999, baseAddr + TMS320_CLOCK); } writew(1, baseAddr + Disable_IRQ); writew(0, baseAddr + Magic_no); for (i = 0; i < 500; i++) { if (readw(baseAddr + Magic_no) == Magic_code) break; msleep(10); } if (readw(baseAddr + Magic_no) != Magic_code) return -EIO; j = readw(baseAddr + Module_cnt); if (j <= 0) return -EIO; brd->numPorts = j * 8; writew(j, baseAddr + Module_no); writew(0, baseAddr + Magic_no); for (i = 0; i < 600; i++) { if (readw(baseAddr + Magic_no) == Magic_code) break; msleep(10); } if (readw(baseAddr + Magic_no) != Magic_code) return -EIO; moxaCard = 1; brd->intNdx = baseAddr + IRQindex; brd->intPend = baseAddr + IRQpending; brd->intTable = baseAddr + IRQtable; return 0; } static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr, size_t len) { void __iomem *ofsAddr, *baseAddr = brd->basemem; struct moxa_port *port; int retval, i; if (len % 2) { printk(KERN_ERR "moxa: C2XX bios length is not even\n"); return -EINVAL; } switch (brd->boardType) { case MOXA_BOARD_C218_ISA: case MOXA_BOARD_C218_PCI: case MOXA_BOARD_CP204J: retval = moxa_load_c218(brd, ptr, len); if (retval) return retval; port = brd->ports; for (i = 0; i < brd->numPorts; i++, port++) { port->chkPort = 1; port->curBaud = 9600L; port->DCDState = 0; port->tableAddr = baseAddr + Extern_table + Extern_size * i; ofsAddr = port->tableAddr; writew(C218rx_mask, ofsAddr + RX_mask); writew(C218tx_mask, ofsAddr + TX_mask); writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb); writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb); writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb); writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb); } break; default: retval = moxa_load_c320(brd, ptr, len); /* fills in numPorts */ if (retval) return retval; port = brd->ports; for (i = 0; i < brd->numPorts; i++, port++) { port->chkPort = 1; port->curBaud = 9600L; port->DCDState = 0; port->tableAddr = baseAddr + Extern_table + Extern_size * i; ofsAddr = port->tableAddr; switch (brd->numPorts) { case 8: writew(C320p8rx_mask, ofsAddr + RX_mask); writew(C320p8tx_mask, ofsAddr + TX_mask); writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb); writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb); writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb); writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb); break; case 16: writew(C320p16rx_mask, ofsAddr + RX_mask); writew(C320p16tx_mask, ofsAddr + TX_mask); writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb); writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb); writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb); writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb); break; case 24: writew(C320p24rx_mask, ofsAddr + RX_mask); writew(C320p24tx_mask, ofsAddr + TX_mask); writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb); writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb); writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb); writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb); break; case 32: writew(C320p32rx_mask, ofsAddr + RX_mask); writew(C320p32tx_mask, ofsAddr + TX_mask); writew(C320p32tx_ofs, ofsAddr + Ofs_txb); writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb); writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb); writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb); writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb); break; } } break; } brd->loadstat = 1; return 0; } static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw) { void *ptr = fw->data; char rsn[64]; u16 lens[5]; size_t len; unsigned int a, lenp, lencnt; int ret = -EINVAL; struct { __le32 magic; /* 0x34303430 */ u8 reserved1[2]; u8 type; /* UNIX = 3 */ u8 model; /* C218T=1, C320T=2, CP204=3 */ u8 reserved2[8]; __le16 len[5]; } *hdr = ptr; BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens)); if (fw->size < MOXA_FW_HDRLEN) { strcpy(rsn, "too short (even header won't fit)"); goto err; } if (hdr->magic != cpu_to_le32(0x30343034)) { sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic)); goto err; } if (hdr->type != 3) { sprintf(rsn, "not for linux, type is %u", hdr->type); goto err; } if (moxa_check_fw_model(brd, hdr->model)) { sprintf(rsn, "not for this card, model is %u", hdr->model); goto err; } len = MOXA_FW_HDRLEN; lencnt = hdr->model == 2 ? 5 : 3; for (a = 0; a < ARRAY_SIZE(lens); a++) { lens[a] = le16_to_cpu(hdr->len[a]); if (lens[a] && len + lens[a] <= fw->size && moxa_check_fw(&fw->data[len])) printk(KERN_WARNING "moxa firmware: unexpected input " "at offset %u, but going on\n", (u32)len); if (!lens[a] && a < lencnt) { sprintf(rsn, "too few entries in fw file"); goto err; } len += lens[a]; } if (len != fw->size) { sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size, (u32)len); goto err; } ptr += MOXA_FW_HDRLEN; lenp = 0; /* bios */ strcpy(rsn, "read above"); ret = moxa_load_bios(brd, ptr, lens[lenp]); if (ret) goto err; /* we skip the tty section (lens[1]), since we don't need it */ ptr += lens[lenp] + lens[lenp + 1]; lenp += 2; /* comm */ if (hdr->model == 2) { ret = moxa_load_320b(brd, ptr, lens[lenp]); if (ret) goto err; /* skip another tty */ ptr += lens[lenp] + lens[lenp + 1]; lenp += 2; } ret = moxa_load_code(brd, ptr, lens[lenp]); if (ret) goto err; return 0; err: printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn); return ret; } static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev) { const struct firmware *fw; const char *file; int ret; switch (brd->boardType) { case MOXA_BOARD_C218_ISA: case MOXA_BOARD_C218_PCI: file = "c218tunx.cod"; break; case MOXA_BOARD_CP204J: file = "cp204unx.cod"; break; default: file = "c320tunx.cod"; break; } ret = request_firmware(&fw, file, dev); if (ret) { printk(KERN_ERR "request_firmware failed\n"); goto end; } ret = moxa_load_fw(brd, fw); release_firmware(fw); end: return ret; } #ifdef CONFIG_PCI static int __devinit moxa_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent) { struct moxa_board_conf *board; unsigned int i; int board_type = ent->driver_data; int retval; retval = pci_enable_device(pdev); if (retval) { dev_err(&pdev->dev, "can't enable pci device\n"); goto err; } for (i = 0; i < MAX_BOARDS; i++) if (moxa_boards[i].basemem == NULL) break; retval = -ENODEV; if (i >= MAX_BOARDS) { dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards " "found. Board is ignored.\n", MAX_BOARDS); goto err; } board = &moxa_boards[i]; board->ports = &moxa_ports[i * MAX_PORTS_PER_BOARD]; retval = pci_request_region(pdev, 2, "moxa-base"); if (retval) { dev_err(&pdev->dev, "can't request pci region 2\n"); goto err; } board->basemem = ioremap(pci_resource_start(pdev, 2), 0x4000); if (board->basemem == NULL) { dev_err(&pdev->dev, "can't remap io space 2\n"); goto err_reg; } board->boardType = board_type; switch (board_type) { case MOXA_BOARD_C218_ISA: case MOXA_BOARD_C218_PCI: board->numPorts = 8; break; case MOXA_BOARD_CP204J: board->numPorts = 4; break; default: board->numPorts = 0; break; } board->busType = MOXA_BUS_TYPE_PCI; retval = moxa_init_board(board, &pdev->dev); if (retval) goto err_base; pci_set_drvdata(pdev, board); return (0); err_base: iounmap(board->basemem); board->basemem = NULL; err_reg: pci_release_region(pdev, 2); err: return retval; } static void __devexit moxa_pci_remove(struct pci_dev *pdev) { struct moxa_board_conf *brd = pci_get_drvdata(pdev); iounmap(brd->basemem); brd->basemem = NULL; pci_release_region(pdev, 2); } static struct pci_driver moxa_pci_driver = { .name = "moxa", .id_table = moxa_pcibrds, .probe = moxa_pci_probe, .remove = __devexit_p(moxa_pci_remove) }; #endif /* CONFIG_PCI */ static int __init moxa_init(void) { struct moxa_port *ch; unsigned int i, isabrds = 0; int retval = 0; printk(KERN_INFO "MOXA Intellio family driver version %s\n", MOXA_VERSION); moxaDriver = alloc_tty_driver(MAX_PORTS + 1); if (!moxaDriver) return -ENOMEM; moxaDriver->owner = THIS_MODULE; moxaDriver->name = "ttyMX"; moxaDriver->major = ttymajor; moxaDriver->minor_start = 0; moxaDriver->type = TTY_DRIVER_TYPE_SERIAL; moxaDriver->subtype = SERIAL_TYPE_NORMAL; moxaDriver->init_termios = tty_std_termios; moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; moxaDriver->init_termios.c_ispeed = 9600; moxaDriver->init_termios.c_ospeed = 9600; moxaDriver->flags = TTY_DRIVER_REAL_RAW; tty_set_operations(moxaDriver, &moxa_ops); for (i = 0, ch = moxa_ports; i < MAX_PORTS; i++, ch++) { ch->type = PORT_16550A; ch->port = i; ch->close_delay = 5 * HZ / 10; ch->closing_wait = 30 * HZ; ch->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; init_waitqueue_head(&ch->open_wait); init_completion(&ch->close_wait); setup_timer(&ch->emptyTimer, moxa_check_xmit_empty, (unsigned long)ch); } pr_debug("Moxa tty devices major number = %d\n", ttymajor); if (tty_register_driver(moxaDriver)) { printk(KERN_ERR "Couldn't install MOXA Smartio family driver !\n"); put_tty_driver(moxaDriver); return -1; } mod_timer(&moxaTimer, jiffies + HZ / 50); /* Find the boards defined from module args. */ #ifdef MODULE { struct moxa_board_conf *brd = moxa_boards; for (i = 0; i < MAX_BOARDS; i++) { if (!baseaddr[i]) break; if (type[i] == MOXA_BOARD_C218_ISA || type[i] == MOXA_BOARD_C320_ISA) { pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n", isabrds + 1, moxa_brdname[type[i] - 1], baseaddr[i]); brd->boardType = type[i]; brd->ports = &moxa_ports[isabrds * MAX_PORTS_PER_BOARD]; brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 : numports[i]; brd->busType = MOXA_BUS_TYPE_ISA; brd->basemem = ioremap(baseaddr[i], 0x4000); if (!brd->basemem) { printk(KERN_ERR "moxa: can't remap %lx\n", baseaddr[i]); continue; } if (moxa_init_board(brd, NULL)) { iounmap(brd->basemem); brd->basemem = NULL; continue; } brd++; isabrds++; } } } #endif #ifdef CONFIG_PCI retval = pci_register_driver(&moxa_pci_driver); if (retval) { printk(KERN_ERR "Can't register moxa pci driver!\n"); if (isabrds) retval = 0; } #endif return retval; } static void __exit moxa_exit(void) { int i; del_timer_sync(&moxaTimer); for (i = 0; i < MAX_PORTS; i++) del_timer_sync(&moxa_ports[i].emptyTimer); if (tty_unregister_driver(moxaDriver)) printk(KERN_ERR "Couldn't unregister MOXA Intellio family " "serial driver\n"); put_tty_driver(moxaDriver); #ifdef CONFIG_PCI pci_unregister_driver(&moxa_pci_driver); #endif for (i = 0; i < MAX_BOARDS; i++) if (moxa_boards[i].basemem) iounmap(moxa_boards[i].basemem); } module_init(moxa_init); module_exit(moxa_exit); static int moxa_open(struct tty_struct *tty, struct file *filp) { struct moxa_port *ch; int port; int retval; port = tty->index; if (port == MAX_PORTS) { return (0); } if (!MoxaPortIsValid(port)) { tty->driver_data = NULL; return (-ENODEV); } ch = &moxa_ports[port]; ch->count++; tty->driver_data = ch; ch->tty = tty; if (!(ch->asyncflags & ASYNC_INITIALIZED)) { ch->statusflags = 0; moxa_set_tty_param(tty, tty->termios); MoxaPortLineCtrl(ch->port, 1, 1); MoxaPortEnable(ch->port); ch->asyncflags |= ASYNC_INITIALIZED; } retval = moxa_block_till_ready(tty, filp, ch); moxa_unthrottle(tty); if (ch->type == PORT_16550A) { MoxaSetFifo(ch->port, 1); } else { MoxaSetFifo(ch->port, 0); } return (retval); } static void moxa_close(struct tty_struct *tty, struct file *filp) { struct moxa_port *ch; int port; port = tty->index; if (port == MAX_PORTS) { return; } if (!MoxaPortIsValid(port)) { pr_debug("Invalid portno in moxa_close\n"); tty->driver_data = NULL; return; } if (tty->driver_data == NULL) { return; } if (tty_hung_up_p(filp)) { return; } ch = (struct moxa_port *) tty->driver_data; if ((tty->count == 1) && (ch->count != 1)) { printk(KERN_WARNING "moxa_close: bad serial port count; " "tty->count is 1, ch->count is %d\n", ch->count); ch->count = 1; } if (--ch->count < 0) { printk(KERN_WARNING "moxa_close: bad serial port count, " "device=%s\n", tty->name); ch->count = 0; } if (ch->count) { return; } ch->asyncflags |= ASYNC_CLOSING; ch->cflag = tty->termios->c_cflag; if (ch->asyncflags & ASYNC_INITIALIZED) { moxa_setup_empty_event(tty); tty_wait_until_sent(tty, 30 * HZ); /* 30 seconds timeout */ del_timer_sync(&moxa_ports[ch->port].emptyTimer); } moxa_shut_down(ch); MoxaPortFlushData(port, 2); if (tty->driver->flush_buffer) tty->driver->flush_buffer(tty); tty_ldisc_flush(tty); tty->closing = 0; ch->event = 0; ch->tty = NULL; if (ch->blocked_open) { if (ch->close_delay) { msleep_interruptible(jiffies_to_msecs(ch->close_delay)); } wake_up_interruptible(&ch->open_wait); } ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING); complete_all(&ch->close_wait); } static int moxa_write(struct tty_struct *tty, const unsigned char *buf, int count) { struct moxa_port *ch; int len, port; unsigned long flags; ch = (struct moxa_port *) tty->driver_data; if (ch == NULL) return (0); port = ch->port; spin_lock_irqsave(&moxa_lock, flags); len = MoxaPortWriteData(port, (unsigned char *) buf, count); spin_unlock_irqrestore(&moxa_lock, flags); /********************************************* if ( !(ch->statusflags & LOWWAIT) && ((len != count) || (MoxaPortTxFree(port) <= 100)) ) ************************************************/ ch->statusflags |= LOWWAIT; return (len); } static int moxa_write_room(struct tty_struct *tty) { struct moxa_port *ch; if (tty->stopped) return (0); ch = (struct moxa_port *) tty->driver_data; if (ch == NULL) return (0); return (MoxaPortTxFree(ch->port)); } static void moxa_flush_buffer(struct tty_struct *tty) { struct moxa_port *ch = (struct moxa_port *) tty->driver_data; if (ch == NULL) return; MoxaPortFlushData(ch->port, 1); tty_wakeup(tty); } static int moxa_chars_in_buffer(struct tty_struct *tty) { int chars; struct moxa_port *ch = (struct moxa_port *) tty->driver_data; /* * Sigh...I have to check if driver_data is NULL here, because * if an open() fails, the TTY subsystem eventually calls * tty_wait_until_sent(), which calls the driver's chars_in_buffer() * routine. And since the open() failed, we return 0 here. TDJ */ if (ch == NULL) return (0); chars = MoxaPortTxQueue(ch->port); if (chars) { /* * Make it possible to wakeup anything waiting for output * in tty_ioctl.c, etc. */ if (!(ch->statusflags & EMPTYWAIT)) moxa_setup_empty_event(tty); } return (chars); } static void moxa_flush_chars(struct tty_struct *tty) { /* * Don't think I need this, because this is called to empty the TX * buffer for the 16450, 16550, etc. */ } static void moxa_put_char(struct tty_struct *tty, unsigned char c) { struct moxa_port *ch; int port; unsigned long flags; ch = (struct moxa_port *) tty->driver_data; if (ch == NULL) return; port = ch->port; spin_lock_irqsave(&moxa_lock, flags); MoxaPortWriteData(port, &c, 1); spin_unlock_irqrestore(&moxa_lock, flags); /************************************************ if ( !(ch->statusflags & LOWWAIT) && (MoxaPortTxFree(port) <= 100) ) *************************************************/ ch->statusflags |= LOWWAIT; } static int moxa_tiocmget(struct tty_struct *tty, struct file *file) { struct moxa_port *ch = (struct moxa_port *) tty->driver_data; int port; int flag = 0, dtr, rts; port = tty->index; if ((port != MAX_PORTS) && (!ch)) return (-EINVAL); MoxaPortGetLineOut(ch->port, &dtr, &rts); if (dtr) flag |= TIOCM_DTR; if (rts) flag |= TIOCM_RTS; dtr = MoxaPortLineStatus(ch->port); if (dtr & 1) flag |= TIOCM_CTS; if (dtr & 2) flag |= TIOCM_DSR; if (dtr & 4) flag |= TIOCM_CD; return flag; } static int moxa_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear) { struct moxa_port *ch = (struct moxa_port *) tty->driver_data; int port; int dtr, rts; port = tty->index; if ((port != MAX_PORTS) && (!ch)) return (-EINVAL); MoxaPortGetLineOut(ch->port, &dtr, &rts); if (set & TIOCM_RTS) rts = 1; if (set & TIOCM_DTR) dtr = 1; if (clear & TIOCM_RTS) rts = 0; if (clear & TIOCM_DTR) dtr = 0; MoxaPortLineCtrl(ch->port, dtr, rts); return 0; } static int moxa_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg) { struct moxa_port *ch = (struct moxa_port *) tty->driver_data; register int port; void __user *argp = (void __user *)arg; int retval; port = tty->index; if ((port != MAX_PORTS) && (!ch)) return (-EINVAL); switch (cmd) { case TCSBRK: /* SVID version: non-zero arg --> no break */ retval = tty_check_change(tty); if (retval) return (retval); moxa_setup_empty_event(tty); tty_wait_until_sent(tty, 0); if (!arg) MoxaPortSendBreak(ch->port, 0); return (0); case TCSBRKP: /* support for POSIX tcsendbreak() */ retval = tty_check_change(tty); if (retval) return (retval); moxa_setup_empty_event(tty); tty_wait_until_sent(tty, 0); MoxaPortSendBreak(ch->port, arg); return (0); case TIOCGSOFTCAR: return put_user(C_CLOCAL(tty) ? 1 : 0, (int __user *)argp); case TIOCSSOFTCAR: if (get_user(retval, (int __user *)argp)) return -EFAULT; arg = retval; tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0)); if (C_CLOCAL(tty)) ch->asyncflags &= ~ASYNC_CHECK_CD; else ch->asyncflags |= ASYNC_CHECK_CD; return (0); case TIOCGSERIAL: return moxa_get_serial_info(ch, argp); case TIOCSSERIAL: return moxa_set_serial_info(ch, argp); default: retval = MoxaDriverIoctl(cmd, arg, port); } return (retval); } static void moxa_throttle(struct tty_struct *tty) { struct moxa_port *ch = (struct moxa_port *) tty->driver_data; ch->statusflags |= THROTTLE; } static void moxa_unthrottle(struct tty_struct *tty) { struct moxa_port *ch = (struct moxa_port *) tty->driver_data; ch->statusflags &= ~THROTTLE; } static void moxa_set_termios(struct tty_struct *tty, struct ktermios *old_termios) { struct moxa_port *ch = (struct moxa_port *) tty->driver_data; if (ch == NULL) return; moxa_set_tty_param(tty, old_termios); if (!(old_termios->c_cflag & CLOCAL) && (tty->termios->c_cflag & CLOCAL)) wake_up_interruptible(&ch->open_wait); } static void moxa_stop(struct tty_struct *tty) { struct moxa_port *ch = (struct moxa_port *) tty->driver_data; if (ch == NULL) return; MoxaPortTxDisable(ch->port); ch->statusflags |= TXSTOPPED; } static void moxa_start(struct tty_struct *tty) { struct moxa_port *ch = (struct moxa_port *) tty->driver_data; if (ch == NULL) return; if (!(ch->statusflags & TXSTOPPED)) return; MoxaPortTxEnable(ch->port); ch->statusflags &= ~TXSTOPPED; } static void moxa_hangup(struct tty_struct *tty) { struct moxa_port *ch = (struct moxa_port *) tty->driver_data; moxa_flush_buffer(tty); moxa_shut_down(ch); ch->event = 0; ch->count = 0; ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE; ch->tty = NULL; wake_up_interruptible(&ch->open_wait); } static void moxa_poll(unsigned long ignored) { register int card; struct moxa_port *ch; struct tty_struct *tp; int i, ports; del_timer(&moxaTimer); if (MoxaDriverPoll() < 0) { mod_timer(&moxaTimer, jiffies + HZ / 50); return; } for (card = 0; card < MAX_BOARDS; card++) { if ((ports = MoxaPortsOfCard(card)) <= 0) continue; ch = &moxa_ports[card * MAX_PORTS_PER_BOARD]; for (i = 0; i < ports; i++, ch++) { if ((ch->asyncflags & ASYNC_INITIALIZED) == 0) continue; if (!(ch->statusflags & THROTTLE) && (MoxaPortRxQueue(ch->port) > 0)) moxa_receive_data(ch); if ((tp = ch->tty) == 0) continue; if (ch->statusflags & LOWWAIT) { if (MoxaPortTxQueue(ch->port) <= WAKEUP_CHARS) { if (!tp->stopped) { ch->statusflags &= ~LOWWAIT; tty_wakeup(tp); } } } if (!I_IGNBRK(tp) && (MoxaPortResetBrkCnt(ch->port) > 0)) { tty_insert_flip_char(tp, 0, TTY_BREAK); tty_schedule_flip(tp); } if (MoxaPortDCDChange(ch->port)) { if (ch->asyncflags & ASYNC_CHECK_CD) { if (MoxaPortDCDON(ch->port)) wake_up_interruptible(&ch->open_wait); else { tty_hangup(tp); wake_up_interruptible(&ch->open_wait); ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE; } } } } } mod_timer(&moxaTimer, jiffies + HZ / 50); } /******************************************************************************/ static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios) { register struct ktermios *ts; struct moxa_port *ch; int rts, cts, txflow, rxflow, xany, baud; ch = (struct moxa_port *) tty->driver_data; ts = tty->termios; if (ts->c_cflag & CLOCAL) ch->asyncflags &= ~ASYNC_CHECK_CD; else ch->asyncflags |= ASYNC_CHECK_CD; rts = cts = txflow = rxflow = xany = 0; if (ts->c_cflag & CRTSCTS) rts = cts = 1; if (ts->c_iflag & IXON) txflow = 1; if (ts->c_iflag & IXOFF) rxflow = 1; if (ts->c_iflag & IXANY) xany = 1; /* Clear the features we don't support */ ts->c_cflag &= ~CMSPAR; MoxaPortFlowCtrl(ch->port, rts, cts, txflow, rxflow, xany); baud = MoxaPortSetTermio(ch->port, ts, tty_get_baud_rate(tty)); if (baud == -1) baud = tty_termios_baud_rate(old_termios); /* Not put the baud rate into the termios data */ tty_encode_baud_rate(tty, baud, baud); } static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp, struct moxa_port *ch) { DECLARE_WAITQUEUE(wait,current); unsigned long flags; int retval; int do_clocal = C_CLOCAL(tty); /* * If the device is in the middle of being closed, then block * until it's done, and then try again. */ if (tty_hung_up_p(filp) || (ch->asyncflags & ASYNC_CLOSING)) { if (ch->asyncflags & ASYNC_CLOSING) wait_for_completion_interruptible(&ch->close_wait); #ifdef SERIAL_DO_RESTART if (ch->asyncflags & ASYNC_HUP_NOTIFY) return (-EAGAIN); else return (-ERESTARTSYS); #else return (-EAGAIN); #endif } /* * If non-blocking mode is set, then make the check up front * and then exit. */ if (filp->f_flags & O_NONBLOCK) { ch->asyncflags |= ASYNC_NORMAL_ACTIVE; return (0); } /* * Block waiting for the carrier detect and the line to become free */ retval = 0; add_wait_queue(&ch->open_wait, &wait); pr_debug("block_til_ready before block: ttys%d, count = %d\n", ch->port, ch->count); spin_lock_irqsave(&moxa_lock, flags); if (!tty_hung_up_p(filp)) ch->count--; ch->blocked_open++; spin_unlock_irqrestore(&moxa_lock, flags); while (1) { set_current_state(TASK_INTERRUPTIBLE); if (tty_hung_up_p(filp) || !(ch->asyncflags & ASYNC_INITIALIZED)) { #ifdef SERIAL_DO_RESTART if (ch->asyncflags & ASYNC_HUP_NOTIFY) retval = -EAGAIN; else retval = -ERESTARTSYS; #else retval = -EAGAIN; #endif break; } if (!(ch->asyncflags & ASYNC_CLOSING) && (do_clocal || MoxaPortDCDON(ch->port))) break; if (signal_pending(current)) { retval = -ERESTARTSYS; break; } schedule(); } set_current_state(TASK_RUNNING); remove_wait_queue(&ch->open_wait, &wait); spin_lock_irqsave(&moxa_lock, flags); if (!tty_hung_up_p(filp)) ch->count++; ch->blocked_open--; spin_unlock_irqrestore(&moxa_lock, flags); pr_debug("block_til_ready after blocking: ttys%d, count = %d\n", ch->port, ch->count); if (retval) return (retval); /* FIXME: review to see if we need to use set_bit on these */ ch->asyncflags |= ASYNC_NORMAL_ACTIVE; return 0; } static void moxa_setup_empty_event(struct tty_struct *tty) { struct moxa_port *ch = tty->driver_data; unsigned long flags; spin_lock_irqsave(&moxa_lock, flags); ch->statusflags |= EMPTYWAIT; mod_timer(&moxa_ports[ch->port].emptyTimer, jiffies + HZ); spin_unlock_irqrestore(&moxa_lock, flags); } static void moxa_check_xmit_empty(unsigned long data) { struct moxa_port *ch; ch = (struct moxa_port *) data; if (ch->tty && (ch->statusflags & EMPTYWAIT)) { if (MoxaPortTxQueue(ch->port) == 0) { ch->statusflags &= ~EMPTYWAIT; tty_wakeup(ch->tty); return; } mod_timer(&moxa_ports[ch->port].emptyTimer, round_jiffies(jiffies + HZ)); } else ch->statusflags &= ~EMPTYWAIT; } static void moxa_shut_down(struct moxa_port *ch) { struct tty_struct *tp; if (!(ch->asyncflags & ASYNC_INITIALIZED)) return; tp = ch->tty; MoxaPortDisable(ch->port); /* * If we're a modem control device and HUPCL is on, drop RTS & DTR. */ if (tp->termios->c_cflag & HUPCL) MoxaPortLineCtrl(ch->port, 0, 0); ch->asyncflags &= ~ASYNC_INITIALIZED; } static void moxa_receive_data(struct moxa_port *ch) { struct tty_struct *tp; struct ktermios *ts; unsigned long flags; ts = NULL; tp = ch->tty; if (tp) ts = tp->termios; /************************************************** if ( !tp || !ts || !(ts->c_cflag & CREAD) ) { *****************************************************/ if (!tp || !ts) { MoxaPortFlushData(ch->port, 0); return; } spin_lock_irqsave(&moxa_lock, flags); MoxaPortReadData(ch->port, tp); spin_unlock_irqrestore(&moxa_lock, flags); tty_schedule_flip(tp); } /* * Query */ struct mon_str { int tick; int rxcnt[MAX_PORTS]; int txcnt[MAX_PORTS]; }; #define DCD_changed 0x01 #define DCD_oldstate 0x80 static int moxaLowWaterChk; static struct mon_str moxaLog; static int moxaFuncTout = HZ / 2; static void moxafunc(void __iomem *, int, ushort); static void moxa_wait_finish(void __iomem *); static void moxa_low_water_check(void __iomem *); /***************************************************************************** * Driver level functions: * * 2. MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port); * * 3. MoxaDriverPoll(void); * *****************************************************************************/ #define MOXA 0x400 #define MOXA_GET_IQUEUE (MOXA + 1) /* get input buffered count */ #define MOXA_GET_OQUEUE (MOXA + 2) /* get output buffered count */ #define MOXA_GETDATACOUNT (MOXA + 23) #define MOXA_GET_IOQUEUE (MOXA + 27) #define MOXA_FLUSH_QUEUE (MOXA + 28) #define MOXA_GET_CONF (MOXA + 35) /* configuration */ #define MOXA_GET_MAJOR (MOXA + 63) #define MOXA_GET_CUMAJOR (MOXA + 64) #define MOXA_GETMSTATUS (MOXA + 65) void MoxaPortFlushData(int port, int mode) { void __iomem *ofsAddr; if ((mode < 0) || (mode > 2)) return; ofsAddr = moxa_ports[port].tableAddr; moxafunc(ofsAddr, FC_FlushQueue, mode); if (mode != 1) { moxa_ports[port].lowChkFlag = 0; moxa_low_water_check(ofsAddr); } } int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port) { int i; int status; int MoxaPortTxQueue(int), MoxaPortRxQueue(int); void __user *argp = (void __user *)arg; if (port == MAX_PORTS) { if ((cmd != MOXA_GET_CONF) && (cmd != MOXA_GETDATACOUNT) && (cmd != MOXA_GET_IOQUEUE) && (cmd != MOXA_GET_MAJOR) && (cmd != MOXA_GET_CUMAJOR) && (cmd != MOXA_GETMSTATUS)) return (-EINVAL); } switch (cmd) { case MOXA_GETDATACOUNT: moxaLog.tick = jiffies; if(copy_to_user(argp, &moxaLog, sizeof(struct mon_str))) return -EFAULT; return (0); case MOXA_FLUSH_QUEUE: MoxaPortFlushData(port, arg); return (0); case MOXA_GET_IOQUEUE: { struct moxaq_str __user *argm = argp; struct moxaq_str tmp; for (i = 0; i < MAX_PORTS; i++, argm++) { memset(&tmp, 0, sizeof(tmp)); if (moxa_ports[i].chkPort) { tmp.inq = MoxaPortRxQueue(i); tmp.outq = MoxaPortTxQueue(i); } if (copy_to_user(argm, &tmp, sizeof(tmp))) return -EFAULT; } return (0); } case MOXA_GET_OQUEUE: i = MoxaPortTxQueue(port); return put_user(i, (unsigned long __user *)argp); case MOXA_GET_IQUEUE: i = MoxaPortRxQueue(port); return put_user(i, (unsigned long __user *)argp); case MOXA_GET_MAJOR: if(copy_to_user(argp, &ttymajor, sizeof(int))) return -EFAULT; return 0; case MOXA_GET_CUMAJOR: i = 0; if(copy_to_user(argp, &i, sizeof(int))) return -EFAULT; return 0; case MOXA_GETMSTATUS: { struct mxser_mstatus __user *argm = argp; struct mxser_mstatus tmp; struct moxa_port *p; for (i = 0; i < MAX_PORTS; i++, argm++) { p = &moxa_ports[i]; memset(&tmp, 0, sizeof(tmp)); if (!p->chkPort) { goto copy; } else { status = MoxaPortLineStatus(p->port); if (status & 1) tmp.cts = 1; if (status & 2) tmp.dsr = 1; if (status & 4) tmp.dcd = 1; } if (!p->tty || !p->tty->termios) tmp.cflag = p->cflag; else tmp.cflag = p->tty->termios->c_cflag; copy: if (copy_to_user(argm, &tmp, sizeof(tmp))) return -EFAULT; } return 0; } } return -ENOIOCTLCMD; } int MoxaDriverPoll(void) { struct moxa_board_conf *brd; register ushort temp; register int card; void __iomem *ofsAddr; void __iomem *ip; int port, p, ports; if (moxaCard == 0) return (-1); for (card = 0; card < MAX_BOARDS; card++) { brd = &moxa_boards[card]; if (brd->loadstat == 0) continue; if ((ports = brd->numPorts) == 0) continue; if (readb(brd->intPend) == 0xff) { ip = brd->intTable + readb(brd->intNdx); p = card * MAX_PORTS_PER_BOARD; ports <<= 1; for (port = 0; port < ports; port += 2, p++) { if ((temp = readw(ip + port)) != 0) { writew(0, ip + port); ofsAddr = moxa_ports[p].tableAddr; if (temp & IntrTx) writew(readw(ofsAddr + HostStat) & ~WakeupTx, ofsAddr + HostStat); if (temp & IntrBreak) { moxa_ports[p].breakCnt++; } if (temp & IntrLine) { if (readb(ofsAddr + FlagStat) & DCD_state) { if ((moxa_ports[p].DCDState & DCD_oldstate) == 0) moxa_ports[p].DCDState = (DCD_oldstate | DCD_changed); } else { if (moxa_ports[p].DCDState & DCD_oldstate) moxa_ports[p].DCDState = DCD_changed; } } } } writeb(0, brd->intPend); } if (moxaLowWaterChk) { p = card * MAX_PORTS_PER_BOARD; for (port = 0; port < ports; port++, p++) { if (moxa_ports[p].lowChkFlag) { moxa_ports[p].lowChkFlag = 0; ofsAddr = moxa_ports[p].tableAddr; moxa_low_water_check(ofsAddr); } } } } moxaLowWaterChk = 0; return (0); } /***************************************************************************** * Card level function: * * 1. MoxaPortsOfCard(int cardno); * *****************************************************************************/ int MoxaPortsOfCard(int cardno) { if (moxa_boards[cardno].boardType == 0) return (0); return (moxa_boards[cardno].numPorts); } /***************************************************************************** * Port level functions: * * 1. MoxaPortIsValid(int port); * * 2. MoxaPortEnable(int port); * * 3. MoxaPortDisable(int port); * * 4. MoxaPortGetMaxBaud(int port); * * 6. MoxaPortSetBaud(int port, long baud); * * 8. MoxaPortSetTermio(int port, unsigned char *termio); * * 9. MoxaPortGetLineOut(int port, int *dtrState, int *rtsState); * * 10. MoxaPortLineCtrl(int port, int dtrState, int rtsState); * * 11. MoxaPortFlowCtrl(int port, int rts, int cts, int rx, int tx,int xany); * * 12. MoxaPortLineStatus(int port); * * 13. MoxaPortDCDChange(int port); * * 14. MoxaPortDCDON(int port); * * 15. MoxaPortFlushData(int port, int mode); * * 16. MoxaPortWriteData(int port, unsigned char * buffer, int length); * * 17. MoxaPortReadData(int port, struct tty_struct *tty); * * 20. MoxaPortTxQueue(int port); * * 21. MoxaPortTxFree(int port); * * 22. MoxaPortRxQueue(int port); * * 24. MoxaPortTxDisable(int port); * * 25. MoxaPortTxEnable(int port); * * 27. MoxaPortResetBrkCnt(int port); * * 30. MoxaPortSendBreak(int port, int ticks); * *****************************************************************************/ /* * Moxa Port Number Description: * * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And, * the port number using in MOXA driver functions will be 0 to 31 for * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96 * to 127 for fourth. For example, if you setup three MOXA boards, * first board is C218, second board is C320-16 and third board is * C320-32. The port number of first board (C218 - 8 ports) is from * 0 to 7. The port number of second board (C320 - 16 ports) is form * 32 to 47. The port number of third board (C320 - 32 ports) is from * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to * 127 will be invalid. * * * Moxa Functions Description: * * Function 1: Driver initialization routine, this routine must be * called when initialized driver. * Syntax: * void MoxaDriverInit(); * * * Function 2: Moxa driver private IOCTL command processing. * Syntax: * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port); * * unsigned int cmd : IOCTL command * unsigned long arg : IOCTL argument * int port : port number (0 - 127) * * return: 0 (OK) * -EINVAL * -ENOIOCTLCMD * * * Function 3: Moxa driver polling process routine. * Syntax: * int MoxaDriverPoll(void); * * return: 0 ; polling O.K. * -1 : no any Moxa card. * * * Function 4: Get the ports of this card. * Syntax: * int MoxaPortsOfCard(int cardno); * * int cardno : card number (0 - 3) * * return: 0 : this card is invalid * 8/16/24/32 * * * Function 5: Check this port is valid or invalid * Syntax: * int MoxaPortIsValid(int port); * int port : port number (0 - 127, ref port description) * * return: 0 : this port is invalid * 1 : this port is valid * * * Function 6: Enable this port to start Tx/Rx data. * Syntax: * void MoxaPortEnable(int port); * int port : port number (0 - 127) * * * Function 7: Disable this port * Syntax: * void MoxaPortDisable(int port); * int port : port number (0 - 127) * * * Function 8: Get the maximun available baud rate of this port. * Syntax: * long MoxaPortGetMaxBaud(int port); * int port : port number (0 - 127) * * return: 0 : this port is invalid * 38400/57600/115200 bps * * * Function 10: Setting baud rate of this port. * Syntax: * long MoxaPortSetBaud(int port, long baud); * int port : port number (0 - 127) * long baud : baud rate (50 - 115200) * * return: 0 : this port is invalid or baud < 50 * 50 - 115200 : the real baud rate set to the port, if * the argument baud is large than maximun * available baud rate, the real setting * baud rate will be the maximun baud rate. * * * Function 12: Configure the port. * Syntax: * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud); * int port : port number (0 - 127) * struct ktermios * termio : termio structure pointer * speed_t baud : baud rate * * return: -1 : this port is invalid or termio == NULL * 0 : setting O.K. * * * Function 13: Get the DTR/RTS state of this port. * Syntax: * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState); * int port : port number (0 - 127) * int * dtrState : pointer to INT to receive the current DTR * state. (if NULL, this function will not * write to this address) * int * rtsState : pointer to INT to receive the current RTS * state. (if NULL, this function will not * write to this address) * * return: -1 : this port is invalid * 0 : O.K. * * * Function 14: Setting the DTR/RTS output state of this port. * Syntax: * void MoxaPortLineCtrl(int port, int dtrState, int rtsState); * int port : port number (0 - 127) * int dtrState : DTR output state (0: off, 1: on) * int rtsState : RTS output state (0: off, 1: on) * * * Function 15: Setting the flow control of this port. * Syntax: * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow, * int txFlow,int xany); * int port : port number (0 - 127) * int rtsFlow : H/W RTS flow control (0: no, 1: yes) * int ctsFlow : H/W CTS flow control (0: no, 1: yes) * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes) * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes) * int xany : S/W XANY flow control (0: no, 1: yes) * * * Function 16: Get ths line status of this port * Syntax: * int MoxaPortLineStatus(int port); * int port : port number (0 - 127) * * return: Bit 0 - CTS state (0: off, 1: on) * Bit 1 - DSR state (0: off, 1: on) * Bit 2 - DCD state (0: off, 1: on) * * * Function 17: Check the DCD state has changed since the last read * of this function. * Syntax: * int MoxaPortDCDChange(int port); * int port : port number (0 - 127) * * return: 0 : no changed * 1 : DCD has changed * * * Function 18: Check ths current DCD state is ON or not. * Syntax: * int MoxaPortDCDON(int port); * int port : port number (0 - 127) * * return: 0 : DCD off * 1 : DCD on * * * Function 19: Flush the Rx/Tx buffer data of this port. * Syntax: * void MoxaPortFlushData(int port, int mode); * int port : port number (0 - 127) * int mode * 0 : flush the Rx buffer * 1 : flush the Tx buffer * 2 : flush the Rx and Tx buffer * * * Function 20: Write data. * Syntax: * int MoxaPortWriteData(int port, unsigned char * buffer, int length); * int port : port number (0 - 127) * unsigned char * buffer : pointer to write data buffer. * int length : write data length * * return: 0 - length : real write data length * * * Function 21: Read data. * Syntax: * int MoxaPortReadData(int port, struct tty_struct *tty); * int port : port number (0 - 127) * struct tty_struct *tty : tty for data * * return: 0 - length : real read data length * * * Function 24: Get the Tx buffer current queued data bytes * Syntax: * int MoxaPortTxQueue(int port); * int port : port number (0 - 127) * * return: .. : Tx buffer current queued data bytes * * * Function 25: Get the Tx buffer current free space * Syntax: * int MoxaPortTxFree(int port); * int port : port number (0 - 127) * * return: .. : Tx buffer current free space * * * Function 26: Get the Rx buffer current queued data bytes * Syntax: * int MoxaPortRxQueue(int port); * int port : port number (0 - 127) * * return: .. : Rx buffer current queued data bytes * * * Function 28: Disable port data transmission. * Syntax: * void MoxaPortTxDisable(int port); * int port : port number (0 - 127) * * * Function 29: Enable port data transmission. * Syntax: * void MoxaPortTxEnable(int port); * int port : port number (0 - 127) * * * Function 31: Get the received BREAK signal count and reset it. * Syntax: * int MoxaPortResetBrkCnt(int port); * int port : port number (0 - 127) * * return: 0 - .. : BREAK signal count * * * Function 34: Send out a BREAK signal. * Syntax: * void MoxaPortSendBreak(int port, int ms100); * int port : port number (0 - 127) * int ms100 : break signal time interval. * unit: 100 mini-second. if ms100 == 0, it will * send out a about 250 ms BREAK signal. * */ int MoxaPortIsValid(int port) { if (moxaCard == 0) return (0); if (moxa_ports[port].chkPort == 0) return (0); return (1); } void MoxaPortEnable(int port) { void __iomem *ofsAddr; int MoxaPortLineStatus(int); short lowwater = 512; ofsAddr = moxa_ports[port].tableAddr; writew(lowwater, ofsAddr + Low_water); moxa_ports[port].breakCnt = 0; if ((moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_ISA) || (moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_PCI)) { moxafunc(ofsAddr, FC_SetBreakIrq, 0); } else { writew(readw(ofsAddr + HostStat) | WakeupBreak, ofsAddr + HostStat); } moxafunc(ofsAddr, FC_SetLineIrq, Magic_code); moxafunc(ofsAddr, FC_FlushQueue, 2); moxafunc(ofsAddr, FC_EnableCH, Magic_code); MoxaPortLineStatus(port); } void MoxaPortDisable(int port) { void __iomem *ofsAddr = moxa_ports[port].tableAddr; moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */ moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code); writew(0, ofsAddr + HostStat); moxafunc(ofsAddr, FC_DisableCH, Magic_code); } long MoxaPortGetMaxBaud(int port) { if ((moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_ISA) || (moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_PCI)) return (460800L); else return (921600L); } long MoxaPortSetBaud(int port, long baud) { void __iomem *ofsAddr; long max, clock; unsigned int val; if ((baud < 50L) || ((max = MoxaPortGetMaxBaud(port)) == 0)) return (0); ofsAddr = moxa_ports[port].tableAddr; if (baud > max) baud = max; if (max == 38400L) clock = 614400L; /* for 9.8304 Mhz : max. 38400 bps */ else if (max == 57600L) clock = 691200L; /* for 11.0592 Mhz : max. 57600 bps */ else clock = 921600L; /* for 14.7456 Mhz : max. 115200 bps */ val = clock / baud; moxafunc(ofsAddr, FC_SetBaud, val); baud = clock / val; moxa_ports[port].curBaud = baud; return (baud); } int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud) { void __iomem *ofsAddr; tcflag_t cflag; tcflag_t mode = 0; if (moxa_ports[port].chkPort == 0 || termio == 0) return (-1); ofsAddr = moxa_ports[port].tableAddr; cflag = termio->c_cflag; /* termio->c_cflag */ mode = termio->c_cflag & CSIZE; if (mode == CS5) mode = MX_CS5; else if (mode == CS6) mode = MX_CS6; else if (mode == CS7) mode = MX_CS7; else if (mode == CS8) mode = MX_CS8; if (termio->c_cflag & CSTOPB) { if (mode == MX_CS5) mode |= MX_STOP15; else mode |= MX_STOP2; } else mode |= MX_STOP1; if (termio->c_cflag & PARENB) { if (termio->c_cflag & PARODD) mode |= MX_PARODD; else mode |= MX_PAREVEN; } else mode |= MX_PARNONE; moxafunc(ofsAddr, FC_SetDataMode, (ushort) mode); if ((moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_ISA) || (moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_PCI)) { if (baud >= 921600L) return (-1); } baud = MoxaPortSetBaud(port, baud); if (termio->c_iflag & (IXON | IXOFF | IXANY)) { writeb(termio->c_cc[VSTART], ofsAddr + FuncArg); writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1); writeb(FC_SetXonXoff, ofsAddr + FuncCode); moxa_wait_finish(ofsAddr); } return (baud); } int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState) { if (!MoxaPortIsValid(port)) return (-1); if (dtrState) { if (moxa_ports[port].lineCtrl & DTR_ON) *dtrState = 1; else *dtrState = 0; } if (rtsState) { if (moxa_ports[port].lineCtrl & RTS_ON) *rtsState = 1; else *rtsState = 0; } return (0); } void MoxaPortLineCtrl(int port, int dtr, int rts) { void __iomem *ofsAddr; int mode; ofsAddr = moxa_ports[port].tableAddr; mode = 0; if (dtr) mode |= DTR_ON; if (rts) mode |= RTS_ON; moxa_ports[port].lineCtrl = mode; moxafunc(ofsAddr, FC_LineControl, mode); } void MoxaPortFlowCtrl(int port, int rts, int cts, int txflow, int rxflow, int txany) { void __iomem *ofsAddr; int mode; ofsAddr = moxa_ports[port].tableAddr; mode = 0; if (rts) mode |= RTS_FlowCtl; if (cts) mode |= CTS_FlowCtl; if (txflow) mode |= Tx_FlowCtl; if (rxflow) mode |= Rx_FlowCtl; if (txany) mode |= IXM_IXANY; moxafunc(ofsAddr, FC_SetFlowCtl, mode); } int MoxaPortLineStatus(int port) { void __iomem *ofsAddr; int val; ofsAddr = moxa_ports[port].tableAddr; if ((moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_ISA) || (moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_PCI)) { moxafunc(ofsAddr, FC_LineStatus, 0); val = readw(ofsAddr + FuncArg); } else { val = readw(ofsAddr + FlagStat) >> 4; } val &= 0x0B; if (val & 8) { val |= 4; if ((moxa_ports[port].DCDState & DCD_oldstate) == 0) moxa_ports[port].DCDState = (DCD_oldstate | DCD_changed); } else { if (moxa_ports[port].DCDState & DCD_oldstate) moxa_ports[port].DCDState = DCD_changed; } val &= 7; return (val); } int MoxaPortDCDChange(int port) { int n; if (moxa_ports[port].chkPort == 0) return (0); n = moxa_ports[port].DCDState; moxa_ports[port].DCDState &= ~DCD_changed; n &= DCD_changed; return (n); } int MoxaPortDCDON(int port) { int n; if (moxa_ports[port].chkPort == 0) return (0); if (moxa_ports[port].DCDState & DCD_oldstate) n = 1; else n = 0; return (n); } int MoxaPortWriteData(int port, unsigned char * buffer, int len) { int c, total, i; ushort tail; int cnt; ushort head, tx_mask, spage, epage; ushort pageno, pageofs, bufhead; void __iomem *baseAddr, *ofsAddr, *ofs; ofsAddr = moxa_ports[port].tableAddr; baseAddr = moxa_boards[port / MAX_PORTS_PER_BOARD].basemem; tx_mask = readw(ofsAddr + TX_mask); spage = readw(ofsAddr + Page_txb); epage = readw(ofsAddr + EndPage_txb); tail = readw(ofsAddr + TXwptr); head = readw(ofsAddr + TXrptr); c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask); if (c > len) c = len; moxaLog.txcnt[port] += c; total = c; if (spage == epage) { bufhead = readw(ofsAddr + Ofs_txb); writew(spage, baseAddr + Control_reg); while (c > 0) { if (head > tail) len = head - tail - 1; else len = tx_mask + 1 - tail; len = (c > len) ? len : c; ofs = baseAddr + DynPage_addr + bufhead + tail; for (i = 0; i < len; i++) writeb(*buffer++, ofs + i); tail = (tail + len) & tx_mask; c -= len; } writew(tail, ofsAddr + TXwptr); } else { len = c; pageno = spage + (tail >> 13); pageofs = tail & Page_mask; do { cnt = Page_size - pageofs; if (cnt > c) cnt = c; c -= cnt; writeb(pageno, baseAddr + Control_reg); ofs = baseAddr + DynPage_addr + pageofs; for (i = 0; i < cnt; i++) writeb(*buffer++, ofs + i); if (c == 0) { writew((tail + len) & tx_mask, ofsAddr + TXwptr); break; } if (++pageno == epage) pageno = spage; pageofs = 0; } while (1); } writeb(1, ofsAddr + CD180TXirq); /* start to send */ return (total); } int MoxaPortReadData(int port, struct tty_struct *tty) { register ushort head, pageofs; int i, count, cnt, len, total, remain; ushort tail, rx_mask, spage, epage; ushort pageno, bufhead; void __iomem *baseAddr, *ofsAddr, *ofs; ofsAddr = moxa_ports[port].tableAddr; baseAddr = moxa_boards[port / MAX_PORTS_PER_BOARD].basemem; head = readw(ofsAddr + RXrptr); tail = readw(ofsAddr + RXwptr); rx_mask = readw(ofsAddr + RX_mask); spage = readw(ofsAddr + Page_rxb); epage = readw(ofsAddr + EndPage_rxb); count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1); if (count == 0) return 0; total = count; remain = count - total; moxaLog.rxcnt[port] += total; count = total; if (spage == epage) { bufhead = readw(ofsAddr + Ofs_rxb); writew(spage, baseAddr + Control_reg); while (count > 0) { if (tail >= head) len = tail - head; else len = rx_mask + 1 - head; len = (count > len) ? len : count; ofs = baseAddr + DynPage_addr + bufhead + head; for (i = 0; i < len; i++) tty_insert_flip_char(tty, readb(ofs + i), TTY_NORMAL); head = (head + len) & rx_mask; count -= len; } writew(head, ofsAddr + RXrptr); } else { len = count; pageno = spage + (head >> 13); pageofs = head & Page_mask; do { cnt = Page_size - pageofs; if (cnt > count) cnt = count; count -= cnt; writew(pageno, baseAddr + Control_reg); ofs = baseAddr + DynPage_addr + pageofs; for (i = 0; i < cnt; i++) tty_insert_flip_char(tty, readb(ofs + i), TTY_NORMAL); if (count == 0) { writew((head + len) & rx_mask, ofsAddr + RXrptr); break; } if (++pageno == epage) pageno = spage; pageofs = 0; } while (1); } if ((readb(ofsAddr + FlagStat) & Xoff_state) && (remain < LowWater)) { moxaLowWaterChk = 1; moxa_ports[port].lowChkFlag = 1; } return (total); } int MoxaPortTxQueue(int port) { void __iomem *ofsAddr; ushort rptr, wptr, mask; int len; ofsAddr = moxa_ports[port].tableAddr; rptr = readw(ofsAddr + TXrptr); wptr = readw(ofsAddr + TXwptr); mask = readw(ofsAddr + TX_mask); len = (wptr - rptr) & mask; return (len); } int MoxaPortTxFree(int port) { void __iomem *ofsAddr; ushort rptr, wptr, mask; int len; ofsAddr = moxa_ports[port].tableAddr; rptr = readw(ofsAddr + TXrptr); wptr = readw(ofsAddr + TXwptr); mask = readw(ofsAddr + TX_mask); len = mask - ((wptr - rptr) & mask); return (len); } int MoxaPortRxQueue(int port) { void __iomem *ofsAddr; ushort rptr, wptr, mask; int len; ofsAddr = moxa_ports[port].tableAddr; rptr = readw(ofsAddr + RXrptr); wptr = readw(ofsAddr + RXwptr); mask = readw(ofsAddr + RX_mask); len = (wptr - rptr) & mask; return (len); } void MoxaPortTxDisable(int port) { void __iomem *ofsAddr; ofsAddr = moxa_ports[port].tableAddr; moxafunc(ofsAddr, FC_SetXoffState, Magic_code); } void MoxaPortTxEnable(int port) { void __iomem *ofsAddr; ofsAddr = moxa_ports[port].tableAddr; moxafunc(ofsAddr, FC_SetXonState, Magic_code); } int MoxaPortResetBrkCnt(int port) { ushort cnt; cnt = moxa_ports[port].breakCnt; moxa_ports[port].breakCnt = 0; return (cnt); } void MoxaPortSendBreak(int port, int ms100) { void __iomem *ofsAddr; ofsAddr = moxa_ports[port].tableAddr; if (ms100) { moxafunc(ofsAddr, FC_SendBreak, Magic_code); msleep(ms100 * 10); } else { moxafunc(ofsAddr, FC_SendBreak, Magic_code); msleep(250); } moxafunc(ofsAddr, FC_StopBreak, Magic_code); } static int moxa_get_serial_info(struct moxa_port *info, struct serial_struct __user *retinfo) { struct serial_struct tmp; memset(&tmp, 0, sizeof(tmp)); tmp.type = info->type; tmp.line = info->port; tmp.port = 0; tmp.irq = 0; tmp.flags = info->asyncflags; tmp.baud_base = 921600; tmp.close_delay = info->close_delay; tmp.closing_wait = info->closing_wait; tmp.custom_divisor = 0; tmp.hub6 = 0; if(copy_to_user(retinfo, &tmp, sizeof(*retinfo))) return -EFAULT; return (0); } static int moxa_set_serial_info(struct moxa_port *info, struct serial_struct __user *new_info) { struct serial_struct new_serial; if(copy_from_user(&new_serial, new_info, sizeof(new_serial))) return -EFAULT; if ((new_serial.irq != 0) || (new_serial.port != 0) || // (new_serial.type != info->type) || (new_serial.custom_divisor != 0) || (new_serial.baud_base != 921600)) return (-EPERM); if (!capable(CAP_SYS_ADMIN)) { if (((new_serial.flags & ~ASYNC_USR_MASK) != (info->asyncflags & ~ASYNC_USR_MASK))) return (-EPERM); } else { info->close_delay = new_serial.close_delay * HZ / 100; info->closing_wait = new_serial.closing_wait * HZ / 100; } new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS); new_serial.flags |= (info->asyncflags & ASYNC_FLAGS); if (new_serial.type == PORT_16550A) { MoxaSetFifo(info->port, 1); } else { MoxaSetFifo(info->port, 0); } info->type = new_serial.type; return (0); } /***************************************************************************** * Static local functions: * *****************************************************************************/ static void moxafunc(void __iomem *ofsAddr, int cmd, ushort arg) { writew(arg, ofsAddr + FuncArg); writew(cmd, ofsAddr + FuncCode); moxa_wait_finish(ofsAddr); } static void moxa_wait_finish(void __iomem *ofsAddr) { unsigned long i, j; i = jiffies; while (readw(ofsAddr + FuncCode) != 0) { j = jiffies; if ((j - i) > moxaFuncTout) { return; } } } static void moxa_low_water_check(void __iomem *ofsAddr) { int len; ushort rptr, wptr, mask; if (readb(ofsAddr + FlagStat) & Xoff_state) { rptr = readw(ofsAddr + RXrptr); wptr = readw(ofsAddr + RXwptr); mask = readw(ofsAddr + RX_mask); len = (wptr - rptr) & mask; if (len <= Low_water) moxafunc(ofsAddr, FC_SendXon, 0); } } static void MoxaSetFifo(int port, int enable) { void __iomem *ofsAddr = moxa_ports[port].tableAddr; if (!enable) { moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0); moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1); } else { moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3); moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16); } }