| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jiri Slaby | 7097 | 65.21% | 47 | 31.33% |
| Linus Torvalds (pre-git) | 2640 | 24.26% | 33 | 22.00% |
| Alan Cox | 572 | 5.26% | 20 | 13.33% |
| Al Viro | 173 | 1.59% | 4 | 2.67% |
| Ilpo Järvinen | 72 | 0.66% | 6 | 4.00% |
| Geert Uytterhoeven | 43 | 0.40% | 1 | 0.67% |
| Andrew Morton | 42 | 0.39% | 3 | 2.00% |
| Lars Kanis | 38 | 0.35% | 1 | 0.67% |
| Linus Torvalds | 34 | 0.31% | 6 | 4.00% |
| Johan Hovold | 32 | 0.29% | 2 | 1.33% |
| Peter Hurley | 22 | 0.20% | 2 | 1.33% |
| Randy Dunlap | 18 | 0.17% | 1 | 0.67% |
| Dirk Eibach | 17 | 0.16% | 2 | 1.33% |
| Dan Carpenter | 17 | 0.16% | 3 | 2.00% |
| Ben Hutchings | 15 | 0.14% | 1 | 0.67% |
| Rakib Mullick | 11 | 0.10% | 1 | 0.67% |
| Russell King | 7 | 0.06% | 1 | 0.67% |
| Kees Cook | 7 | 0.06% | 1 | 0.67% |
| Julia Lawall | 6 | 0.06% | 2 | 1.33% |
| David Howells | 5 | 0.05% | 2 | 1.33% |
| Manuel Zerpies | 4 | 0.04% | 1 | 0.67% |
| Greg Kroah-Hartman | 2 | 0.02% | 2 | 1.33% |
| Christoph Hellwig | 2 | 0.02% | 1 | 0.67% |
| Adrian Bunk | 2 | 0.02% | 1 | 0.67% |
| Bill Pemberton | 1 | 0.01% | 1 | 0.67% |
| Arvind Yadav | 1 | 0.01% | 1 | 0.67% |
| Ingo Molnar | 1 | 0.01% | 1 | 0.67% |
| Hans Wennborg | 1 | 0.01% | 1 | 0.67% |
| Flavio Suligoi | 1 | 0.01% | 1 | 0.67% |
| Harvey Harrison | 1 | 0.01% | 1 | 0.67% |
| Total | 10884 | 150 |
// SPDX-License-Identifier: GPL-2.0+ /*****************************************************************************/ /* * moxa.c -- MOXA Intellio family multiport serial driver. * * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com). * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com> * * This code is loosely based on the Linux serial driver, written by * Linus Torvalds, Theodore T'so and others. */ /* * MOXA Intellio Series Driver * for : LINUX * date : 1999/1/7 * version : 5.1 */ #include <linux/module.h> #include <linux/types.h> #include <linux/mm.h> #include <linux/ioport.h> #include <linux/errno.h> #include <linux/firmware.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/major.h> #include <linux/string.h> #include <linux/fcntl.h> #include <linux/ptrace.h> #include <linux/serial.h> #include <linux/tty_driver.h> #include <linux/delay.h> #include <linux/pci.h> #include <linux/init.h> #include <linux/bitops.h> #include <linux/slab.h> #include <linux/ratelimit.h> #include <asm/io.h> #include <linux/uaccess.h> #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_GETMSTATUS (MOXA + 65) /* * System Configuration */ #define Magic_code 0x404 /* * for C218 BIOS initialization */ #define C218_ConfBase 0x800 #define C218_status (C218_ConfBase + 0) /* BIOS running status */ #define C218_diag (C218_ConfBase + 2) /* diagnostic status */ #define C218_key (C218_ConfBase + 4) /* WORD (0x218 for C218) */ #define C218DLoad_len (C218_ConfBase + 6) /* WORD */ #define C218check_sum (C218_ConfBase + 8) /* BYTE */ #define C218chksum_ok (C218_ConfBase + 0x0a) /* BYTE (1:ok) */ #define C218_TestRx (C218_ConfBase + 0x10) /* 8 bytes for 8 ports */ #define C218_TestTx (C218_ConfBase + 0x18) /* 8 bytes for 8 ports */ #define C218_RXerr (C218_ConfBase + 0x20) /* 8 bytes for 8 ports */ #define C218_ErrFlag (C218_ConfBase + 0x28) /* 8 bytes for 8 ports */ #define C218_LoadBuf 0x0F00 #define C218_KeyCode 0x218 #define CP204J_KeyCode 0x204 /* * for C320 BIOS initialization */ #define C320_ConfBase 0x800 #define C320_LoadBuf 0x0f00 #define STS_init 0x05 /* for C320_status */ #define C320_status C320_ConfBase + 0 /* BIOS running status */ #define C320_diag C320_ConfBase + 2 /* diagnostic status */ #define C320_key C320_ConfBase + 4 /* WORD (0320H for C320) */ #define C320DLoad_len C320_ConfBase + 6 /* WORD */ #define C320check_sum C320_ConfBase + 8 /* WORD */ #define C320chksum_ok C320_ConfBase + 0x0a /* WORD (1:ok) */ #define C320bapi_len C320_ConfBase + 0x0c /* WORD */ #define C320UART_no C320_ConfBase + 0x0e /* WORD */ #define C320_KeyCode 0x320 #define FixPage_addr 0x0000 /* starting addr of static page */ #define DynPage_addr 0x2000 /* starting addr of dynamic page */ #define C218_start 0x3000 /* starting addr of C218 BIOS prg */ #define Control_reg 0x1ff0 /* select page and reset control */ #define HW_reset 0x80 /* * Function Codes */ #define FC_CardReset 0x80 #define FC_ChannelReset 1 /* C320 firmware not supported */ #define FC_EnableCH 2 #define FC_DisableCH 3 #define FC_SetParam 4 #define FC_SetMode 5 #define FC_SetRate 6 #define FC_LineControl 7 #define FC_LineStatus 8 #define FC_XmitControl 9 #define FC_FlushQueue 10 #define FC_SendBreak 11 #define FC_StopBreak 12 #define FC_LoopbackON 13 #define FC_LoopbackOFF 14 #define FC_ClrIrqTable 15 #define FC_SendXon 16 #define FC_SetTermIrq 17 /* C320 firmware not supported */ #define FC_SetCntIrq 18 /* C320 firmware not supported */ #define FC_SetBreakIrq 19 #define FC_SetLineIrq 20 #define FC_SetFlowCtl 21 #define FC_GenIrq 22 #define FC_InCD180 23 #define FC_OutCD180 24 #define FC_InUARTreg 23 #define FC_OutUARTreg 24 #define FC_SetXonXoff 25 #define FC_OutCD180CCR 26 #define FC_ExtIQueue 27 #define FC_ExtOQueue 28 #define FC_ClrLineIrq 29 #define FC_HWFlowCtl 30 #define FC_GetClockRate 35 #define FC_SetBaud 36 #define FC_SetDataMode 41 #define FC_GetCCSR 43 #define FC_GetDataError 45 #define FC_RxControl 50 #define FC_ImmSend 51 #define FC_SetXonState 52 #define FC_SetXoffState 53 #define FC_SetRxFIFOTrig 54 #define FC_SetTxFIFOCnt 55 #define FC_UnixRate 56 #define FC_UnixResetTimer 57 #define RxFIFOTrig1 0 #define RxFIFOTrig4 1 #define RxFIFOTrig8 2 #define RxFIFOTrig14 3 /* * Dual-Ported RAM */ #define DRAM_global 0 #define INT_data (DRAM_global + 0) #define Config_base (DRAM_global + 0x108) #define IRQindex (INT_data + 0) #define IRQpending (INT_data + 4) #define IRQtable (INT_data + 8) /* * Interrupt Status */ #define IntrRx 0x01 /* receiver data O.K. */ #define IntrTx 0x02 /* transmit buffer empty */ #define IntrFunc 0x04 /* function complete */ #define IntrBreak 0x08 /* received break */ #define IntrLine 0x10 /* line status change for transmitter */ #define IntrIntr 0x20 /* received INTR code */ #define IntrQuit 0x40 /* received QUIT code */ #define IntrEOF 0x80 /* received EOF code */ #define IntrRxTrigger 0x100 /* rx data count reach trigger value */ #define IntrTxTrigger 0x200 /* tx data count below trigger value */ #define Magic_no (Config_base + 0) #define Card_model_no (Config_base + 2) #define Total_ports (Config_base + 4) #define Module_cnt (Config_base + 8) #define Module_no (Config_base + 10) #define Timer_10ms (Config_base + 14) #define Disable_IRQ (Config_base + 20) #define TMS320_PORT1 (Config_base + 22) #define TMS320_PORT2 (Config_base + 24) #define TMS320_CLOCK (Config_base + 26) /* * DATA BUFFER in DRAM */ #define Extern_table 0x400 /* Base address of the external table (24 words * 64) total 3K bytes (24 words * 128) total 6K bytes */ #define Extern_size 0x60 /* 96 bytes */ #define RXrptr 0x00 /* read pointer for RX buffer */ #define RXwptr 0x02 /* write pointer for RX buffer */ #define TXrptr 0x04 /* read pointer for TX buffer */ #define TXwptr 0x06 /* write pointer for TX buffer */ #define HostStat 0x08 /* IRQ flag and general flag */ #define FlagStat 0x0A #define FlowControl 0x0C /* B7 B6 B5 B4 B3 B2 B1 B0 */ /* x x x x | | | | */ /* | | | + CTS flow */ /* | | +--- RTS flow */ /* | +------ TX Xon/Xoff */ /* +--------- RX Xon/Xoff */ #define Break_cnt 0x0E /* received break count */ #define CD180TXirq 0x10 /* if non-0: enable TX irq */ #define RX_mask 0x12 #define TX_mask 0x14 #define Ofs_rxb 0x16 #define Ofs_txb 0x18 #define Page_rxb 0x1A #define Page_txb 0x1C #define EndPage_rxb 0x1E #define EndPage_txb 0x20 #define Data_error 0x22 #define RxTrigger 0x28 #define TxTrigger 0x2a #define rRXwptr 0x34 #define Low_water 0x36 #define FuncCode 0x40 #define FuncArg 0x42 #define FuncArg1 0x44 #define C218rx_size 0x2000 /* 8K bytes */ #define C218tx_size 0x8000 /* 32K bytes */ #define C218rx_mask (C218rx_size - 1) #define C218tx_mask (C218tx_size - 1) #define C320p8rx_size 0x2000 #define C320p8tx_size 0x8000 #define C320p8rx_mask (C320p8rx_size - 1) #define C320p8tx_mask (C320p8tx_size - 1) #define C320p16rx_size 0x2000 #define C320p16tx_size 0x4000 #define C320p16rx_mask (C320p16rx_size - 1) #define C320p16tx_mask (C320p16tx_size - 1) #define C320p24rx_size 0x2000 #define C320p24tx_size 0x2000 #define C320p24rx_mask (C320p24rx_size - 1) #define C320p24tx_mask (C320p24tx_size - 1) #define C320p32rx_size 0x1000 #define C320p32tx_size 0x1000 #define C320p32rx_mask (C320p32rx_size - 1) #define C320p32tx_mask (C320p32tx_size - 1) #define Page_size 0x2000U #define Page_mask (Page_size - 1) #define C218rx_spage 3 #define C218tx_spage 4 #define C218rx_pageno 1 #define C218tx_pageno 4 #define C218buf_pageno 5 #define C320p8rx_spage 3 #define C320p8tx_spage 4 #define C320p8rx_pgno 1 #define C320p8tx_pgno 4 #define C320p8buf_pgno 5 #define C320p16rx_spage 3 #define C320p16tx_spage 4 #define C320p16rx_pgno 1 #define C320p16tx_pgno 2 #define C320p16buf_pgno 3 #define C320p24rx_spage 3 #define C320p24tx_spage 4 #define C320p24rx_pgno 1 #define C320p24tx_pgno 1 #define C320p24buf_pgno 2 #define C320p32rx_spage 3 #define C320p32tx_ofs C320p32rx_size #define C320p32tx_spage 3 #define C320p32buf_pgno 1 /* * Host Status */ #define WakeupRx 0x01 #define WakeupTx 0x02 #define WakeupBreak 0x08 #define WakeupLine 0x10 #define WakeupIntr 0x20 #define WakeupQuit 0x40 #define WakeupEOF 0x80 /* used in VTIME control */ #define WakeupRxTrigger 0x100 #define WakeupTxTrigger 0x200 /* * Flag status */ #define Rx_over 0x01 #define Xoff_state 0x02 #define Tx_flowOff 0x04 #define Tx_enable 0x08 #define CTS_state 0x10 #define DSR_state 0x20 #define DCD_state 0x80 /* * FlowControl */ #define CTS_FlowCtl 1 #define RTS_FlowCtl 2 #define Tx_FlowCtl 4 #define Rx_FlowCtl 8 #define IXM_IXANY 0x10 #define LowWater 128 #define DTR_ON 1 #define RTS_ON 2 #define CTS_ON 1 #define DSR_ON 2 #define DCD_ON 8 /* mode definition */ #define MX_CS8 0x03 #define MX_CS7 0x02 #define MX_CS6 0x01 #define MX_CS5 0x00 #define MX_STOP1 0x00 #define MX_STOP15 0x04 #define MX_STOP2 0x08 #define MX_PARNONE 0x00 #define MX_PAREVEN 0x40 #define MX_PARODD 0xC0 #define MX_PARMARK 0xA0 #define MX_PARSPACE 0x20 #define MOXA_VERSION "6.0k" #define MOXA_FW_HDRLEN 32 #define MOXAMAJOR 172 #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 MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \ (brd)->boardType == MOXA_BOARD_C320_PCI) /* * 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 const 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; unsigned int ready; 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 { struct tty_port port; struct moxa_board_conf *board; void __iomem *tableAddr; int type; int cflag; unsigned long statusflags; u8 DCDState; /* Protected by the port lock */ u8 lineCtrl; u8 lowChkFlag; }; struct mon_str { int tick; int rxcnt[MAX_PORTS]; int txcnt[MAX_PORTS]; }; /* statusflags */ #define TXSTOPPED 1 #define LOWWAIT 2 #define EMPTYWAIT 3 #define WAKEUP_CHARS 256 static int ttymajor = MOXAMAJOR; static struct mon_str moxaLog; static unsigned int moxaFuncTout = HZ / 2; static unsigned int moxaLowWaterChk; static DEFINE_MUTEX(moxa_openlock); static DEFINE_SPINLOCK(moxa_lock); static unsigned long baseaddr[MAX_BOARDS]; static unsigned int type[MAX_BOARDS]; static unsigned int numports[MAX_BOARDS]; static struct tty_port moxa_service_port; MODULE_AUTHOR("William Chen"); MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver"); MODULE_LICENSE("GPL"); MODULE_FIRMWARE("c218tunx.cod"); MODULE_FIRMWARE("cp204unx.cod"); MODULE_FIRMWARE("c320tunx.cod"); module_param_array(type, uint, NULL, 0); MODULE_PARM_DESC(type, "card type: C218=2, C320=4"); module_param_hw_array(baseaddr, ulong, ioport, NULL, 0); MODULE_PARM_DESC(baseaddr, "base address"); module_param_array(numports, uint, NULL, 0); MODULE_PARM_DESC(numports, "numports (ignored for C218)"); 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 unsigned int moxa_write_room(struct tty_struct *); static void moxa_flush_buffer(struct tty_struct *); static unsigned int moxa_chars_in_buffer(struct tty_struct *); static void moxa_set_termios(struct tty_struct *, const 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); static int moxa_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear); static void moxa_poll(struct timer_list *); static void moxa_set_tty_param(struct tty_struct *, const struct ktermios *); static void moxa_shutdown(struct tty_port *); static bool moxa_carrier_raised(struct tty_port *); static void moxa_dtr_rts(struct tty_port *, bool); /* * moxa board interface functions: */ static void MoxaPortEnable(struct moxa_port *); static void MoxaPortDisable(struct moxa_port *); static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t); static int MoxaPortGetLineOut(struct moxa_port *, bool *, bool *); static void MoxaPortLineCtrl(struct moxa_port *, bool, bool); static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int); static int MoxaPortLineStatus(struct moxa_port *); static void MoxaPortFlushData(struct moxa_port *, int); static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int); static int MoxaPortReadData(struct moxa_port *); static unsigned int MoxaPortTxQueue(struct moxa_port *); static int MoxaPortRxQueue(struct moxa_port *); static unsigned int MoxaPortTxFree(struct moxa_port *); static void MoxaPortTxDisable(struct moxa_port *); static void MoxaPortTxEnable(struct moxa_port *); static int moxa_get_serial_info(struct tty_struct *, struct serial_struct *); static int moxa_set_serial_info(struct tty_struct *, struct serial_struct *); static void MoxaSetFifo(struct moxa_port *port, int enable); /* * I/O functions */ static DEFINE_SPINLOCK(moxafunc_lock); static void moxa_wait_finish(void __iomem *ofsAddr) { unsigned long end = jiffies + moxaFuncTout; while (readw(ofsAddr + FuncCode) != 0) if (time_after(jiffies, end)) return; if (readw(ofsAddr + FuncCode) != 0) printk_ratelimited(KERN_WARNING "moxa function expired\n"); } static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg) { unsigned long flags; spin_lock_irqsave(&moxafunc_lock, flags); writew(arg, ofsAddr + FuncArg); writew(cmd, ofsAddr + FuncCode); moxa_wait_finish(ofsAddr); spin_unlock_irqrestore(&moxafunc_lock, flags); } static int moxafuncret(void __iomem *ofsAddr, u16 cmd, u16 arg) { unsigned long flags; u16 ret; spin_lock_irqsave(&moxafunc_lock, flags); writew(arg, ofsAddr + FuncArg); writew(cmd, ofsAddr + FuncCode); moxa_wait_finish(ofsAddr); ret = readw(ofsAddr + FuncArg); spin_unlock_irqrestore(&moxafunc_lock, flags); return ret; } static void moxa_low_water_check(void __iomem *ofsAddr) { u16 rptr, wptr, mask, len; 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); } } /* * TTY operations */ static int moxa_ioctl(struct tty_struct *tty, unsigned int cmd, unsigned long arg) { struct moxa_port *ch = tty->driver_data; void __user *argp = (void __user *)arg; int status, ret = 0; if (tty->index == MAX_PORTS) { if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE && cmd != MOXA_GETMSTATUS) return -EINVAL; } else if (!ch) return -ENODEV; switch (cmd) { case MOXA_GETDATACOUNT: moxaLog.tick = jiffies; if (copy_to_user(argp, &moxaLog, sizeof(moxaLog))) ret = -EFAULT; break; case MOXA_FLUSH_QUEUE: MoxaPortFlushData(ch, arg); break; case MOXA_GET_IOQUEUE: { struct moxaq_str __user *argm = argp; struct moxaq_str tmp; struct moxa_port *p; unsigned int i, j; for (i = 0; i < MAX_BOARDS; i++) { p = moxa_boards[i].ports; for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) { memset(&tmp, 0, sizeof(tmp)); spin_lock_bh(&moxa_lock); if (moxa_boards[i].ready) { tmp.inq = MoxaPortRxQueue(p); tmp.outq = MoxaPortTxQueue(p); } spin_unlock_bh(&moxa_lock); if (copy_to_user(argm, &tmp, sizeof(tmp))) return -EFAULT; } } break; } case MOXA_GET_OQUEUE: status = MoxaPortTxQueue(ch); ret = put_user(status, (unsigned long __user *)argp); break; case MOXA_GET_IQUEUE: status = MoxaPortRxQueue(ch); ret = put_user(status, (unsigned long __user *)argp); break; case MOXA_GETMSTATUS: { struct mxser_mstatus __user *argm = argp; struct mxser_mstatus tmp; struct moxa_port *p; unsigned int i, j; for (i = 0; i < MAX_BOARDS; i++) { p = moxa_boards[i].ports; for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) { struct tty_struct *ttyp; memset(&tmp, 0, sizeof(tmp)); spin_lock_bh(&moxa_lock); if (!moxa_boards[i].ready) { spin_unlock_bh(&moxa_lock); goto copy; } status = MoxaPortLineStatus(p); spin_unlock_bh(&moxa_lock); if (status & 1) tmp.cts = 1; if (status & 2) tmp.dsr = 1; if (status & 4) tmp.dcd = 1; ttyp = tty_port_tty_get(&p->port); if (!ttyp) tmp.cflag = p->cflag; else tmp.cflag = ttyp->termios.c_cflag; tty_kref_put(ttyp); copy: if (copy_to_user(argm, &tmp, sizeof(tmp))) return -EFAULT; } } break; } default: ret = -ENOIOCTLCMD; } return ret; } static int moxa_break_ctl(struct tty_struct *tty, int state) { struct moxa_port *port = tty->driver_data; moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak, Magic_code); return 0; } 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, .ioctl = moxa_ioctl, .set_termios = moxa_set_termios, .stop = moxa_stop, .start = moxa_start, .hangup = moxa_hangup, .break_ctl = moxa_break_ctl, .tiocmget = moxa_tiocmget, .tiocmset = moxa_tiocmset, .set_serial = moxa_set_serial_info, .get_serial = moxa_get_serial_info, }; static const struct tty_port_operations moxa_port_ops = { .carrier_raised = moxa_carrier_raised, .dtr_rts = moxa_dtr_rts, .shutdown = moxa_shutdown, }; static struct tty_driver *moxaDriver; static DEFINE_TIMER(moxaTimer, moxa_poll); /* * HW init */ 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_real_load_code(struct moxa_board_conf *brd, const void *ptr, size_t len) { void __iomem *baseAddr = brd->basemem; const __le16 *uptr = ptr; size_t wlen, len2, j; unsigned long key, loadbuf, loadlen, checksum, checksum_ok; unsigned int i, retry; u16 usum, keycode; keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode : C218_KeyCode; switch (brd->boardType) { case MOXA_BOARD_CP204J: case MOXA_BOARD_C218_ISA: case MOXA_BOARD_C218_PCI: key = C218_key; loadbuf = C218_LoadBuf; loadlen = C218DLoad_len; checksum = C218check_sum; checksum_ok = C218chksum_ok; break; default: key = C320_key; keycode = C320_KeyCode; loadbuf = C320_LoadBuf; loadlen = C320DLoad_len; checksum = C320check_sum; checksum_ok = C320chksum_ok; break; } 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 + loadbuf, ptr + j, len2 << 1); j += len2 << 1; writew(len2, baseAddr + loadlen); writew(0, baseAddr + key); for (i = 0; i < 100; i++) { if (readw(baseAddr + key) == keycode) break; msleep(10); } if (readw(baseAddr + key) != keycode) return -EIO; } writew(0, baseAddr + loadlen); writew(usum, baseAddr + checksum); writew(0, baseAddr + key); for (i = 0; i < 100; i++) { if (readw(baseAddr + key) == keycode) break; msleep(10); } retry++; } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3)); if (readb(baseAddr + checksum_ok) != 1) return -EIO; writew(0, baseAddr + 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 (MOXA_IS_320(brd)) { 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; if (MOXA_IS_320(brd)) { 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; } 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: bios length is not even\n"); return -EINVAL; } retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */ if (retval) return retval; switch (brd->boardType) { case MOXA_BOARD_C218_ISA: case MOXA_BOARD_C218_PCI: case MOXA_BOARD_CP204J: port = brd->ports; for (i = 0; i < brd->numPorts; i++, port++) { port->board = brd; 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: port = brd->ports; for (i = 0; i < brd->numPorts; i++, port++) { port->board = brd; 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; } return 0; } static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw) { const 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]; } const *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; struct moxa_port *p; unsigned int i, first_idx; int ret; brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports), GFP_KERNEL); if (brd->ports == NULL) { printk(KERN_ERR "cannot allocate memory for ports\n"); ret = -ENOMEM; goto err; } for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) { tty_port_init(&p->port); p->port.ops = &moxa_port_ops; p->type = PORT_16550A; p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL; } 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 "MOXA: request_firmware failed. Make sure " "you've placed '%s' file into your firmware " "loader directory (e.g. /lib/firmware)\n", file); goto err_free; } ret = moxa_load_fw(brd, fw); release_firmware(fw); if (ret) goto err_free; spin_lock_bh(&moxa_lock); brd->ready = 1; if (!timer_pending(&moxaTimer)) mod_timer(&moxaTimer, jiffies + HZ / 50); spin_unlock_bh(&moxa_lock); first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD; for (i = 0; i < brd->numPorts; i++) tty_port_register_device(&brd->ports[i].port, moxaDriver, first_idx + i, dev); return 0; err_free: for (i = 0; i < MAX_PORTS_PER_BOARD; i++) tty_port_destroy(&brd->ports[i].port); kfree(brd->ports); err: return ret; } static void moxa_board_deinit(struct moxa_board_conf *brd) { unsigned int a, opened, first_idx; mutex_lock(&moxa_openlock); spin_lock_bh(&moxa_lock); brd->ready = 0; spin_unlock_bh(&moxa_lock); /* pci hot-un-plug support */ for (a = 0; a < brd->numPorts; a++) if (tty_port_initialized(&brd->ports[a].port)) tty_port_tty_hangup(&brd->ports[a].port, false); for (a = 0; a < MAX_PORTS_PER_BOARD; a++) tty_port_destroy(&brd->ports[a].port); while (1) { opened = 0; for (a = 0; a < brd->numPorts; a++) if (tty_port_initialized(&brd->ports[a].port)) opened++; mutex_unlock(&moxa_openlock); if (!opened) break; msleep(50); mutex_lock(&moxa_openlock); } first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD; for (a = 0; a < brd->numPorts; a++) tty_unregister_device(moxaDriver, first_idx + a); iounmap(brd->basemem); brd->basemem = NULL; kfree(brd->ports); } #ifdef CONFIG_PCI static int 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]; 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"); retval = -ENOMEM; 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); dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n", moxa_brdname[board_type - 1], board->numPorts); return 0; err_base: iounmap(board->basemem); board->basemem = NULL; err_reg: pci_release_region(pdev, 2); err: return retval; } static void moxa_pci_remove(struct pci_dev *pdev) { struct moxa_board_conf *brd = pci_get_drvdata(pdev); moxa_board_deinit(brd); pci_release_region(pdev, 2); } static struct pci_driver moxa_pci_driver = { .name = "moxa", .id_table = moxa_pcibrds, .probe = moxa_pci_probe, .remove = moxa_pci_remove }; #endif /* CONFIG_PCI */ static int __init moxa_init(void) { unsigned int isabrds = 0; int retval = 0; struct moxa_board_conf *brd = moxa_boards; unsigned int i; printk(KERN_INFO "MOXA Intellio family driver version %s\n", MOXA_VERSION); tty_port_init(&moxa_service_port); moxaDriver = tty_alloc_driver(MAX_PORTS + 1, TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV); if (IS_ERR(moxaDriver)) return PTR_ERR(moxaDriver); 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; tty_set_operations(moxaDriver, &moxa_ops); /* Having one more port only for ioctls is ugly */ tty_port_link_device(&moxa_service_port, moxaDriver, MAX_PORTS); if (tty_register_driver(moxaDriver)) { printk(KERN_ERR "can't register MOXA Smartio tty driver!\n"); tty_driver_kref_put(moxaDriver); return -1; } /* Find the boards defined from module args. */ 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->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; } printk(KERN_INFO "MOXA isa board found at 0x%.8lx and " "ready (%u ports, firmware loaded)\n", baseaddr[i], brd->numPorts); brd++; isabrds++; } } #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) { unsigned int i; #ifdef CONFIG_PCI pci_unregister_driver(&moxa_pci_driver); #endif for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */ if (moxa_boards[i].ready) moxa_board_deinit(&moxa_boards[i]); del_timer_sync(&moxaTimer); tty_unregister_driver(moxaDriver); tty_driver_kref_put(moxaDriver); } module_init(moxa_init); module_exit(moxa_exit); static void moxa_shutdown(struct tty_port *port) { struct moxa_port *ch = container_of(port, struct moxa_port, port); MoxaPortDisable(ch); MoxaPortFlushData(ch, 2); } static bool moxa_carrier_raised(struct tty_port *port) { struct moxa_port *ch = container_of(port, struct moxa_port, port); int dcd; spin_lock_irq(&port->lock); dcd = ch->DCDState; spin_unlock_irq(&port->lock); return dcd; } static void moxa_dtr_rts(struct tty_port *port, bool active) { struct moxa_port *ch = container_of(port, struct moxa_port, port); MoxaPortLineCtrl(ch, active, active); } static int moxa_open(struct tty_struct *tty, struct file *filp) { struct moxa_board_conf *brd; struct moxa_port *ch; int port; port = tty->index; if (port == MAX_PORTS) { return capable(CAP_SYS_ADMIN) ? 0 : -EPERM; } if (mutex_lock_interruptible(&moxa_openlock)) return -ERESTARTSYS; brd = &moxa_boards[port / MAX_PORTS_PER_BOARD]; if (!brd->ready) { mutex_unlock(&moxa_openlock); return -ENODEV; } if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) { mutex_unlock(&moxa_openlock); return -ENODEV; } ch = &brd->ports[port % MAX_PORTS_PER_BOARD]; ch->port.count++; tty->driver_data = ch; tty_port_tty_set(&ch->port, tty); mutex_lock(&ch->port.mutex); if (!tty_port_initialized(&ch->port)) { ch->statusflags = 0; moxa_set_tty_param(tty, &tty->termios); MoxaPortLineCtrl(ch, true, true); MoxaPortEnable(ch); MoxaSetFifo(ch, ch->type == PORT_16550A); tty_port_set_initialized(&ch->port, true); } mutex_unlock(&ch->port.mutex); mutex_unlock(&moxa_openlock); return tty_port_block_til_ready(&ch->port, tty, filp); } static void moxa_close(struct tty_struct *tty, struct file *filp) { struct moxa_port *ch = tty->driver_data; ch->cflag = tty->termios.c_cflag; tty_port_close(&ch->port, tty, filp); } static int moxa_write(struct tty_struct *tty, const unsigned char *buf, int count) { struct moxa_port *ch = tty->driver_data; unsigned long flags; int len; if (ch == NULL) return 0; spin_lock_irqsave(&moxa_lock, flags); len = MoxaPortWriteData(tty, buf, count); spin_unlock_irqrestore(&moxa_lock, flags); set_bit(LOWWAIT, &ch->statusflags); return len; } static unsigned int moxa_write_room(struct tty_struct *tty) { struct moxa_port *ch; if (tty->flow.stopped) return 0; ch = tty->driver_data; if (ch == NULL) return 0; return MoxaPortTxFree(ch); } static void moxa_flush_buffer(struct tty_struct *tty) { struct moxa_port *ch = tty->driver_data; if (ch == NULL) return; MoxaPortFlushData(ch, 1); tty_wakeup(tty); } static unsigned int moxa_chars_in_buffer(struct tty_struct *tty) { struct moxa_port *ch = tty->driver_data; unsigned int chars; chars = MoxaPortTxQueue(ch); if (chars) /* * Make it possible to wakeup anything waiting for output * in tty_ioctl.c, etc. */ set_bit(EMPTYWAIT, &ch->statusflags); return chars; } static int moxa_tiocmget(struct tty_struct *tty) { struct moxa_port *ch = tty->driver_data; bool dtr_active, rts_active; int flag = 0; int status; MoxaPortGetLineOut(ch, &dtr_active, &rts_active); if (dtr_active) flag |= TIOCM_DTR; if (rts_active) flag |= TIOCM_RTS; status = MoxaPortLineStatus(ch); if (status & 1) flag |= TIOCM_CTS; if (status & 2) flag |= TIOCM_DSR; if (status & 4) flag |= TIOCM_CD; return flag; } static int moxa_tiocmset(struct tty_struct *tty, unsigned int set, unsigned int clear) { bool dtr_active, rts_active; struct moxa_port *ch; mutex_lock(&moxa_openlock); ch = tty->driver_data; if (!ch) { mutex_unlock(&moxa_openlock); return -EINVAL; } MoxaPortGetLineOut(ch, &dtr_active, &rts_active); if (set & TIOCM_RTS) rts_active = true; if (set & TIOCM_DTR) dtr_active = true; if (clear & TIOCM_RTS) rts_active = false; if (clear & TIOCM_DTR) dtr_active = false; MoxaPortLineCtrl(ch, dtr_active, rts_active); mutex_unlock(&moxa_openlock); return 0; } static void moxa_set_termios(struct tty_struct *tty, const struct ktermios *old_termios) { struct moxa_port *ch = tty->driver_data; if (ch == NULL) return; moxa_set_tty_param(tty, old_termios); if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty)) wake_up_interruptible(&ch->port.open_wait); } static void moxa_stop(struct tty_struct *tty) { struct moxa_port *ch = tty->driver_data; if (ch == NULL) return; MoxaPortTxDisable(ch); set_bit(TXSTOPPED, &ch->statusflags); } static void moxa_start(struct tty_struct *tty) { struct moxa_port *ch = tty->driver_data; if (ch == NULL) return; if (!test_bit(TXSTOPPED, &ch->statusflags)) return; MoxaPortTxEnable(ch); clear_bit(TXSTOPPED, &ch->statusflags); } static void moxa_hangup(struct tty_struct *tty) { struct moxa_port *ch = tty->driver_data; tty_port_hangup(&ch->port); } static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd) { unsigned long flags; dcd = !!dcd; spin_lock_irqsave(&p->port.lock, flags); if (dcd != p->DCDState) { p->DCDState = dcd; spin_unlock_irqrestore(&p->port.lock, flags); if (!dcd) tty_port_tty_hangup(&p->port, true); } else spin_unlock_irqrestore(&p->port.lock, flags); } static int moxa_poll_port(struct moxa_port *p, unsigned int handle, u16 __iomem *ip) { struct tty_struct *tty = tty_port_tty_get(&p->port); bool inited = tty_port_initialized(&p->port); void __iomem *ofsAddr; u16 intr; if (tty) { if (test_bit(EMPTYWAIT, &p->statusflags) && MoxaPortTxQueue(p) == 0) { clear_bit(EMPTYWAIT, &p->statusflags); tty_wakeup(tty); } if (test_bit(LOWWAIT, &p->statusflags) && !tty->flow.stopped && MoxaPortTxQueue(p) <= WAKEUP_CHARS) { clear_bit(LOWWAIT, &p->statusflags); tty_wakeup(tty); } if (inited && !tty_throttled(tty) && MoxaPortRxQueue(p) > 0) { /* RX */ MoxaPortReadData(p); tty_flip_buffer_push(&p->port); } } else { clear_bit(EMPTYWAIT, &p->statusflags); MoxaPortFlushData(p, 0); /* flush RX */ } if (!handle) /* nothing else to do */ goto put; intr = readw(ip); /* port irq status */ if (intr == 0) goto put; writew(0, ip); /* ACK port */ ofsAddr = p->tableAddr; if (intr & IntrTx) /* disable tx intr */ writew(readw(ofsAddr + HostStat) & ~WakeupTx, ofsAddr + HostStat); if (!inited) goto put; if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */ tty_insert_flip_char(&p->port, 0, TTY_BREAK); tty_flip_buffer_push(&p->port); } if (intr & IntrLine) moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state); put: tty_kref_put(tty); return 0; } static void moxa_poll(struct timer_list *unused) { struct moxa_board_conf *brd; u16 __iomem *ip; unsigned int card, port, served = 0; spin_lock(&moxa_lock); for (card = 0; card < MAX_BOARDS; card++) { brd = &moxa_boards[card]; if (!brd->ready) continue; served++; ip = NULL; if (readb(brd->intPend) == 0xff) ip = brd->intTable + readb(brd->intNdx); for (port = 0; port < brd->numPorts; port++) moxa_poll_port(&brd->ports[port], !!ip, ip + port); if (ip) writeb(0, brd->intPend); /* ACK */ if (moxaLowWaterChk) { struct moxa_port *p = brd->ports; for (port = 0; port < brd->numPorts; port++, p++) if (p->lowChkFlag) { p->lowChkFlag = 0; moxa_low_water_check(p->tableAddr); } } } moxaLowWaterChk = 0; if (served) mod_timer(&moxaTimer, jiffies + HZ / 50); spin_unlock(&moxa_lock); } /******************************************************************************/ static void moxa_set_tty_param(struct tty_struct *tty, const struct ktermios *old_termios) { register struct ktermios *ts = &tty->termios; struct moxa_port *ch = tty->driver_data; int rts, cts, txflow, rxflow, xany, baud; 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; MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany); baud = MoxaPortSetTermio(ch, 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); } /***************************************************************************** * Driver level functions: * *****************************************************************************/ static void MoxaPortFlushData(struct moxa_port *port, int mode) { void __iomem *ofsAddr; if (mode < 0 || mode > 2) return; ofsAddr = port->tableAddr; moxafunc(ofsAddr, FC_FlushQueue, mode); if (mode != 1) { port->lowChkFlag = 0; moxa_low_water_check(ofsAddr); } } /* * 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 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 10: Setting baud rate of this port. * Syntax: * speed_t MoxaPortSetBaud(int port, speed_t 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, bool *dtrState, bool *rtsState); * int port : port number (0 - 127) * bool * dtr_active : pointer to bool to receive the current DTR * state. (if NULL, this function will not * write to this address) * bool * rts_active : pointer to bool 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, bool dtrState, bool rtsState); * int port : port number (0 - 127) * bool dtr_active : DTR output state * bool rts_active : RTS output state * * * 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 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 * * */ static void MoxaPortEnable(struct moxa_port *port) { void __iomem *ofsAddr; u16 lowwater = 512; ofsAddr = port->tableAddr; writew(lowwater, ofsAddr + Low_water); if (MOXA_IS_320(port->board)) 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); } static void MoxaPortDisable(struct moxa_port *port) { void __iomem *ofsAddr = 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); } static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud) { void __iomem *ofsAddr = port->tableAddr; unsigned int clock, val; speed_t max; max = MOXA_IS_320(port->board) ? 460800 : 921600; if (baud < 50) return 0; if (baud > max) baud = max; clock = 921600; val = clock / baud; moxafunc(ofsAddr, FC_SetBaud, val); baud = clock / val; return baud; } static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio, speed_t baud) { void __iomem *ofsAddr; tcflag_t mode = 0; ofsAddr = port->tableAddr; 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) { if (termio->c_cflag & CMSPAR) mode |= MX_PARMARK; else mode |= MX_PARODD; } else { if (termio->c_cflag & CMSPAR) mode |= MX_PARSPACE; else mode |= MX_PAREVEN; } } else mode |= MX_PARNONE; moxafunc(ofsAddr, FC_SetDataMode, (u16)mode); if (MOXA_IS_320(port->board) && baud >= 921600) return -1; baud = MoxaPortSetBaud(port, baud); if (termio->c_iflag & (IXON | IXOFF | IXANY)) { spin_lock_irq(&moxafunc_lock); writeb(termio->c_cc[VSTART], ofsAddr + FuncArg); writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1); writeb(FC_SetXonXoff, ofsAddr + FuncCode); moxa_wait_finish(ofsAddr); spin_unlock_irq(&moxafunc_lock); } return baud; } static int MoxaPortGetLineOut(struct moxa_port *port, bool *dtr_active, bool *rts_active) { if (dtr_active) *dtr_active = port->lineCtrl & DTR_ON; if (rts_active) *rts_active = port->lineCtrl & RTS_ON; return 0; } static void MoxaPortLineCtrl(struct moxa_port *port, bool dtr_active, bool rts_active) { u8 mode = 0; if (dtr_active) mode |= DTR_ON; if (rts_active) mode |= RTS_ON; port->lineCtrl = mode; moxafunc(port->tableAddr, FC_LineControl, mode); } static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts, int txflow, int rxflow, int txany) { int 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(port->tableAddr, FC_SetFlowCtl, mode); } static int MoxaPortLineStatus(struct moxa_port *port) { void __iomem *ofsAddr; int val; ofsAddr = port->tableAddr; if (MOXA_IS_320(port->board)) val = moxafuncret(ofsAddr, FC_LineStatus, 0); else val = readw(ofsAddr + FlagStat) >> 4; val &= 0x0B; if (val & 8) val |= 4; moxa_new_dcdstate(port, val & 8); val &= 7; return val; } static int MoxaPortWriteData(struct tty_struct *tty, const unsigned char *buffer, int len) { struct moxa_port *port = tty->driver_data; void __iomem *baseAddr, *ofsAddr, *ofs; unsigned int c, total; u16 head, tail, tx_mask, spage, epage; u16 pageno, pageofs, bufhead; ofsAddr = port->tableAddr; baseAddr = port->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->port.tty->index] += 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; memcpy_toio(ofs, buffer, len); buffer += len; tail = (tail + len) & tx_mask; c -= len; } } else { pageno = spage + (tail >> 13); pageofs = tail & Page_mask; while (c > 0) { len = Page_size - pageofs; if (len > c) len = c; writeb(pageno, baseAddr + Control_reg); ofs = baseAddr + DynPage_addr + pageofs; memcpy_toio(ofs, buffer, len); buffer += len; if (++pageno == epage) pageno = spage; pageofs = 0; c -= len; } tail = (tail + total) & tx_mask; } writew(tail, ofsAddr + TXwptr); writeb(1, ofsAddr + CD180TXirq); /* start to send */ return total; } static int MoxaPortReadData(struct moxa_port *port) { struct tty_struct *tty = port->port.tty; unsigned char *dst; void __iomem *baseAddr, *ofsAddr, *ofs; unsigned int count, len, total; u16 tail, rx_mask, spage, epage; u16 pageno, pageofs, bufhead, head; ofsAddr = port->tableAddr; baseAddr = port->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; moxaLog.rxcnt[tty->index] += total; if (spage == epage) { bufhead = readw(ofsAddr + Ofs_rxb); writew(spage, baseAddr + Control_reg); while (count > 0) { ofs = baseAddr + DynPage_addr + bufhead + head; len = (tail >= head) ? (tail - head) : (rx_mask + 1 - head); len = tty_prepare_flip_string(&port->port, &dst, min(len, count)); memcpy_fromio(dst, ofs, len); head = (head + len) & rx_mask; count -= len; } } else { pageno = spage + (head >> 13); pageofs = head & Page_mask; while (count > 0) { writew(pageno, baseAddr + Control_reg); ofs = baseAddr + DynPage_addr + pageofs; len = tty_prepare_flip_string(&port->port, &dst, min(Page_size - pageofs, count)); memcpy_fromio(dst, ofs, len); count -= len; pageofs = (pageofs + len) & Page_mask; if (pageofs == 0 && ++pageno == epage) pageno = spage; } head = (head + total) & rx_mask; } writew(head, ofsAddr + RXrptr); if (readb(ofsAddr + FlagStat) & Xoff_state) { moxaLowWaterChk = 1; port->lowChkFlag = 1; } return total; } static unsigned int MoxaPortTxQueue(struct moxa_port *port) { void __iomem *ofsAddr = port->tableAddr; u16 rptr, wptr, mask; rptr = readw(ofsAddr + TXrptr); wptr = readw(ofsAddr + TXwptr); mask = readw(ofsAddr + TX_mask); return (wptr - rptr) & mask; } static unsigned int MoxaPortTxFree(struct moxa_port *port) { void __iomem *ofsAddr = port->tableAddr; u16 rptr, wptr, mask; rptr = readw(ofsAddr + TXrptr); wptr = readw(ofsAddr + TXwptr); mask = readw(ofsAddr + TX_mask); return mask - ((wptr - rptr) & mask); } static int MoxaPortRxQueue(struct moxa_port *port) { void __iomem *ofsAddr = port->tableAddr; u16 rptr, wptr, mask; rptr = readw(ofsAddr + RXrptr); wptr = readw(ofsAddr + RXwptr); mask = readw(ofsAddr + RX_mask); return (wptr - rptr) & mask; } static void MoxaPortTxDisable(struct moxa_port *port) { moxafunc(port->tableAddr, FC_SetXoffState, Magic_code); } static void MoxaPortTxEnable(struct moxa_port *port) { moxafunc(port->tableAddr, FC_SetXonState, Magic_code); } static int moxa_get_serial_info(struct tty_struct *tty, struct serial_struct *ss) { struct moxa_port *info = tty->driver_data; if (tty->index == MAX_PORTS) return -EINVAL; if (!info) return -ENODEV; mutex_lock(&info->port.mutex); ss->type = info->type; ss->line = info->port.tty->index; ss->flags = info->port.flags; ss->baud_base = 921600; ss->close_delay = jiffies_to_msecs(info->port.close_delay) / 10; mutex_unlock(&info->port.mutex); return 0; } static int moxa_set_serial_info(struct tty_struct *tty, struct serial_struct *ss) { struct moxa_port *info = tty->driver_data; unsigned int close_delay; if (tty->index == MAX_PORTS) return -EINVAL; if (!info) return -ENODEV; close_delay = msecs_to_jiffies(ss->close_delay * 10); mutex_lock(&info->port.mutex); if (!capable(CAP_SYS_ADMIN)) { if (close_delay != info->port.close_delay || ss->type != info->type || ((ss->flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK))) { mutex_unlock(&info->port.mutex); return -EPERM; } } else { info->port.close_delay = close_delay; MoxaSetFifo(info, ss->type == PORT_16550A); info->type = ss->type; } mutex_unlock(&info->port.mutex); return 0; } /***************************************************************************** * Static local functions: * *****************************************************************************/ static void MoxaSetFifo(struct moxa_port *port, int enable) { void __iomem *ofsAddr = 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); } }
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