diff options
Diffstat (limited to 'drivers/char/rocket.c')
| -rw-r--r-- | drivers/char/rocket.c | 3199 |
1 files changed, 0 insertions, 3199 deletions
diff --git a/drivers/char/rocket.c b/drivers/char/rocket.c deleted file mode 100644 index 3e4e73a0d7c..00000000000 --- a/drivers/char/rocket.c +++ /dev/null @@ -1,3199 +0,0 @@ -/* - * RocketPort device driver for Linux - * - * Written by Theodore Ts'o, 1995, 1996, 1997, 1998, 1999, 2000. - * - * Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2003 by Comtrol, Inc. - * - * 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. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - -/* - * Kernel Synchronization: - * - * This driver has 2 kernel control paths - exception handlers (calls into the driver - * from user mode) and the timer bottom half (tasklet). This is a polled driver, interrupts - * are not used. - * - * Critical data: - * - rp_table[], accessed through passed "info" pointers, is a global (static) array of - * serial port state information and the xmit_buf circular buffer. Protected by - * a per port spinlock. - * - xmit_flags[], an array of ints indexed by line (port) number, indicating that there - * is data to be transmitted. Protected by atomic bit operations. - * - rp_num_ports, int indicating number of open ports, protected by atomic operations. - * - * rp_write() and rp_write_char() functions use a per port semaphore to protect against - * simultaneous access to the same port by more than one process. - */ - -/****** Defines ******/ -#define ROCKET_PARANOIA_CHECK -#define ROCKET_DISABLE_SIMUSAGE - -#undef ROCKET_SOFT_FLOW -#undef ROCKET_DEBUG_OPEN -#undef ROCKET_DEBUG_INTR -#undef ROCKET_DEBUG_WRITE -#undef ROCKET_DEBUG_FLOW -#undef ROCKET_DEBUG_THROTTLE -#undef ROCKET_DEBUG_WAIT_UNTIL_SENT -#undef ROCKET_DEBUG_RECEIVE -#undef ROCKET_DEBUG_HANGUP -#undef REV_PCI_ORDER -#undef ROCKET_DEBUG_IO - -#define POLL_PERIOD HZ/100 /* Polling period .01 seconds (10ms) */ - -/****** Kernel includes ******/ - -#include <linux/module.h> -#include <linux/errno.h> -#include <linux/major.h> -#include <linux/kernel.h> -#include <linux/signal.h> -#include <linux/slab.h> -#include <linux/mm.h> -#include <linux/sched.h> -#include <linux/timer.h> -#include <linux/interrupt.h> -#include <linux/tty.h> -#include <linux/tty_driver.h> -#include <linux/tty_flip.h> -#include <linux/serial.h> -#include <linux/string.h> -#include <linux/fcntl.h> -#include <linux/ptrace.h> -#include <linux/mutex.h> -#include <linux/ioport.h> -#include <linux/delay.h> -#include <linux/completion.h> -#include <linux/wait.h> -#include <linux/pci.h> -#include <linux/uaccess.h> -#include <asm/atomic.h> -#include <asm/unaligned.h> -#include <linux/bitops.h> -#include <linux/spinlock.h> -#include <linux/init.h> - -/****** RocketPort includes ******/ - -#include "rocket_int.h" -#include "rocket.h" - -#define ROCKET_VERSION "2.09" -#define ROCKET_DATE "12-June-2003" - -/****** RocketPort Local Variables ******/ - -static void rp_do_poll(unsigned long dummy); - -static struct tty_driver *rocket_driver; - -static struct rocket_version driver_version = { - ROCKET_VERSION, ROCKET_DATE -}; - -static struct r_port *rp_table[MAX_RP_PORTS]; /* The main repository of serial port state information. */ -static unsigned int xmit_flags[NUM_BOARDS]; /* Bit significant, indicates port had data to transmit. */ - /* eg. Bit 0 indicates port 0 has xmit data, ... */ -static atomic_t rp_num_ports_open; /* Number of serial ports open */ -static DEFINE_TIMER(rocket_timer, rp_do_poll, 0, 0); - -static unsigned long board1; /* ISA addresses, retrieved from rocketport.conf */ -static unsigned long board2; -static unsigned long board3; -static unsigned long board4; -static unsigned long controller; -static int support_low_speed; -static unsigned long modem1; -static unsigned long modem2; -static unsigned long modem3; -static unsigned long modem4; -static unsigned long pc104_1[8]; -static unsigned long pc104_2[8]; -static unsigned long pc104_3[8]; -static unsigned long pc104_4[8]; -static unsigned long *pc104[4] = { pc104_1, pc104_2, pc104_3, pc104_4 }; - -static int rp_baud_base[NUM_BOARDS]; /* Board config info (Someday make a per-board structure) */ -static unsigned long rcktpt_io_addr[NUM_BOARDS]; -static int rcktpt_type[NUM_BOARDS]; -static int is_PCI[NUM_BOARDS]; -static rocketModel_t rocketModel[NUM_BOARDS]; -static int max_board; -static const struct tty_port_operations rocket_port_ops; - -/* - * The following arrays define the interrupt bits corresponding to each AIOP. - * These bits are different between the ISA and regular PCI boards and the - * Universal PCI boards. - */ - -static Word_t aiop_intr_bits[AIOP_CTL_SIZE] = { - AIOP_INTR_BIT_0, - AIOP_INTR_BIT_1, - AIOP_INTR_BIT_2, - AIOP_INTR_BIT_3 -}; - -static Word_t upci_aiop_intr_bits[AIOP_CTL_SIZE] = { - UPCI_AIOP_INTR_BIT_0, - UPCI_AIOP_INTR_BIT_1, - UPCI_AIOP_INTR_BIT_2, - UPCI_AIOP_INTR_BIT_3 -}; - -static Byte_t RData[RDATASIZE] = { - 0x00, 0x09, 0xf6, 0x82, - 0x02, 0x09, 0x86, 0xfb, - 0x04, 0x09, 0x00, 0x0a, - 0x06, 0x09, 0x01, 0x0a, - 0x08, 0x09, 0x8a, 0x13, - 0x0a, 0x09, 0xc5, 0x11, - 0x0c, 0x09, 0x86, 0x85, - 0x0e, 0x09, 0x20, 0x0a, - 0x10, 0x09, 0x21, 0x0a, - 0x12, 0x09, 0x41, 0xff, - 0x14, 0x09, 0x82, 0x00, - 0x16, 0x09, 0x82, 0x7b, - 0x18, 0x09, 0x8a, 0x7d, - 0x1a, 0x09, 0x88, 0x81, - 0x1c, 0x09, 0x86, 0x7a, - 0x1e, 0x09, 0x84, 0x81, - 0x20, 0x09, 0x82, 0x7c, - 0x22, 0x09, 0x0a, 0x0a -}; - -static Byte_t RRegData[RREGDATASIZE] = { - 0x00, 0x09, 0xf6, 0x82, /* 00: Stop Rx processor */ - 0x08, 0x09, 0x8a, 0x13, /* 04: Tx software flow control */ - 0x0a, 0x09, 0xc5, 0x11, /* 08: XON char */ - 0x0c, 0x09, 0x86, 0x85, /* 0c: XANY */ - 0x12, 0x09, 0x41, 0xff, /* 10: Rx mask char */ - 0x14, 0x09, 0x82, 0x00, /* 14: Compare/Ignore #0 */ - 0x16, 0x09, 0x82, 0x7b, /* 18: Compare #1 */ - 0x18, 0x09, 0x8a, 0x7d, /* 1c: Compare #2 */ - 0x1a, 0x09, 0x88, 0x81, /* 20: Interrupt #1 */ - 0x1c, 0x09, 0x86, 0x7a, /* 24: Ignore/Replace #1 */ - 0x1e, 0x09, 0x84, 0x81, /* 28: Interrupt #2 */ - 0x20, 0x09, 0x82, 0x7c, /* 2c: Ignore/Replace #2 */ - 0x22, 0x09, 0x0a, 0x0a /* 30: Rx FIFO Enable */ -}; - -static CONTROLLER_T sController[CTL_SIZE] = { - {-1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, {0, 0, 0, 0}, - {0, 0, 0, 0}, {-1, -1, -1, -1}, {0, 0, 0, 0}}, - {-1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, {0, 0, 0, 0}, - {0, 0, 0, 0}, {-1, -1, -1, -1}, {0, 0, 0, 0}}, - {-1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, {0, 0, 0, 0}, - {0, 0, 0, 0}, {-1, -1, -1, -1}, {0, 0, 0, 0}}, - {-1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, {0, 0, 0, 0}, - {0, 0, 0, 0}, {-1, -1, -1, -1}, {0, 0, 0, 0}} -}; - -static Byte_t sBitMapClrTbl[8] = { - 0xfe, 0xfd, 0xfb, 0xf7, 0xef, 0xdf, 0xbf, 0x7f -}; - -static Byte_t sBitMapSetTbl[8] = { - 0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80 -}; - -static int sClockPrescale = 0x14; - -/* - * Line number is the ttySIx number (x), the Minor number. We - * assign them sequentially, starting at zero. The following - * array keeps track of the line number assigned to a given board/aiop/channel. - */ -static unsigned char lineNumbers[MAX_RP_PORTS]; -static unsigned long nextLineNumber; - -/***** RocketPort Static Prototypes *********/ -static int __init init_ISA(int i); -static void rp_wait_until_sent(struct tty_struct *tty, int timeout); -static void rp_flush_buffer(struct tty_struct *tty); -static void rmSpeakerReset(CONTROLLER_T * CtlP, unsigned long model); -static unsigned char GetLineNumber(int ctrl, int aiop, int ch); -static unsigned char SetLineNumber(int ctrl, int aiop, int ch); -static void rp_start(struct tty_struct *tty); -static int sInitChan(CONTROLLER_T * CtlP, CHANNEL_T * ChP, int AiopNum, - int ChanNum); -static void sSetInterfaceMode(CHANNEL_T * ChP, Byte_t mode); -static void sFlushRxFIFO(CHANNEL_T * ChP); -static void sFlushTxFIFO(CHANNEL_T * ChP); -static void sEnInterrupts(CHANNEL_T * ChP, Word_t Flags); -static void sDisInterrupts(CHANNEL_T * ChP, Word_t Flags); -static void sModemReset(CONTROLLER_T * CtlP, int chan, int on); -static void sPCIModemReset(CONTROLLER_T * CtlP, int chan, int on); -static int sWriteTxPrioByte(CHANNEL_T * ChP, Byte_t Data); -static int sPCIInitController(CONTROLLER_T * CtlP, int CtlNum, - ByteIO_t * AiopIOList, int AiopIOListSize, - WordIO_t ConfigIO, int IRQNum, Byte_t Frequency, - int PeriodicOnly, int altChanRingIndicator, - int UPCIRingInd); -static int sInitController(CONTROLLER_T * CtlP, int CtlNum, ByteIO_t MudbacIO, - ByteIO_t * AiopIOList, int AiopIOListSize, - int IRQNum, Byte_t Frequency, int PeriodicOnly); -static int sReadAiopID(ByteIO_t io); -static int sReadAiopNumChan(WordIO_t io); - -MODULE_AUTHOR("Theodore Ts'o"); -MODULE_DESCRIPTION("Comtrol RocketPort driver"); -module_param(board1, ulong, 0); -MODULE_PARM_DESC(board1, "I/O port for (ISA) board #1"); -module_param(board2, ulong, 0); -MODULE_PARM_DESC(board2, "I/O port for (ISA) board #2"); -module_param(board3, ulong, 0); -MODULE_PARM_DESC(board3, "I/O port for (ISA) board #3"); -module_param(board4, ulong, 0); -MODULE_PARM_DESC(board4, "I/O port for (ISA) board #4"); -module_param(controller, ulong, 0); -MODULE_PARM_DESC(controller, "I/O port for (ISA) rocketport controller"); -module_param(support_low_speed, bool, 0); -MODULE_PARM_DESC(support_low_speed, "1 means support 50 baud, 0 means support 460400 baud"); -module_param(modem1, ulong, 0); -MODULE_PARM_DESC(modem1, "1 means (ISA) board #1 is a RocketModem"); -module_param(modem2, ulong, 0); -MODULE_PARM_DESC(modem2, "1 means (ISA) board #2 is a RocketModem"); -module_param(modem3, ulong, 0); -MODULE_PARM_DESC(modem3, "1 means (ISA) board #3 is a RocketModem"); -module_param(modem4, ulong, 0); -MODULE_PARM_DESC(modem4, "1 means (ISA) board #4 is a RocketModem"); -module_param_array(pc104_1, ulong, NULL, 0); -MODULE_PARM_DESC(pc104_1, "set interface types for ISA(PC104) board #1 (e.g. pc104_1=232,232,485,485,..."); -module_param_array(pc104_2, ulong, NULL, 0); -MODULE_PARM_DESC(pc104_2, "set interface types for ISA(PC104) board #2 (e.g. pc104_2=232,232,485,485,..."); -module_param_array(pc104_3, ulong, NULL, 0); -MODULE_PARM_DESC(pc104_3, "set interface types for ISA(PC104) board #3 (e.g. pc104_3=232,232,485,485,..."); -module_param_array(pc104_4, ulong, NULL, 0); -MODULE_PARM_DESC(pc104_4, "set interface types for ISA(PC104) board #4 (e.g. pc104_4=232,232,485,485,..."); - -static int rp_init(void); -static void rp_cleanup_module(void); - -module_init(rp_init); -module_exit(rp_cleanup_module); - - -MODULE_LICENSE("Dual BSD/GPL"); - -/*************************************************************************/ -/* Module code starts here */ - -static inline int rocket_paranoia_check(struct r_port *info, - const char *routine) -{ -#ifdef ROCKET_PARANOIA_CHECK - if (!info) - return 1; - if (info->magic != RPORT_MAGIC) { - printk(KERN_WARNING "Warning: bad magic number for rocketport " - "struct in %s\n", routine); - return 1; - } -#endif - return 0; -} - - -/* Serial port receive data function. Called (from timer poll) when an AIOPIC signals - * that receive data is present on a serial port. Pulls data from FIFO, moves it into the - * tty layer. - */ -static void rp_do_receive(struct r_port *info, - struct tty_struct *tty, - CHANNEL_t * cp, unsigned int ChanStatus) -{ - unsigned int CharNStat; - int ToRecv, wRecv, space; - unsigned char *cbuf; - - ToRecv = sGetRxCnt(cp); -#ifdef ROCKET_DEBUG_INTR - printk(KERN_INFO "rp_do_receive(%d)...\n", ToRecv); -#endif - if (ToRecv == 0) - return; - - /* - * if status indicates there are errored characters in the - * FIFO, then enter status mode (a word in FIFO holds - * character and status). - */ - if (ChanStatus & (RXFOVERFL | RXBREAK | RXFRAME | RXPARITY)) { - if (!(ChanStatus & STATMODE)) { -#ifdef ROCKET_DEBUG_RECEIVE - printk(KERN_INFO "Entering STATMODE...\n"); -#endif - ChanStatus |= STATMODE; - sEnRxStatusMode(cp); - } - } - - /* - * if we previously entered status mode, then read down the - * FIFO one word at a time, pulling apart the character and - * the status. Update error counters depending on status - */ - if (ChanStatus & STATMODE) { -#ifdef ROCKET_DEBUG_RECEIVE - printk(KERN_INFO "Ignore %x, read %x...\n", - info->ignore_status_mask, info->read_status_mask); -#endif - while (ToRecv) { - char flag; - - CharNStat = sInW(sGetTxRxDataIO(cp)); -#ifdef ROCKET_DEBUG_RECEIVE - printk(KERN_INFO "%x...\n", CharNStat); -#endif - if (CharNStat & STMBREAKH) - CharNStat &= ~(STMFRAMEH | STMPARITYH); - if (CharNStat & info->ignore_status_mask) { - ToRecv--; - continue; - } - CharNStat &= info->read_status_mask; - if (CharNStat & STMBREAKH) - flag = TTY_BREAK; - else if (CharNStat & STMPARITYH) - flag = TTY_PARITY; - else if (CharNStat & STMFRAMEH) - flag = TTY_FRAME; - else if (CharNStat & STMRCVROVRH) - flag = TTY_OVERRUN; - else - flag = TTY_NORMAL; - tty_insert_flip_char(tty, CharNStat & 0xff, flag); - ToRecv--; - } - - /* - * after we've emptied the FIFO in status mode, turn - * status mode back off - */ - if (sGetRxCnt(cp) == 0) { -#ifdef ROCKET_DEBUG_RECEIVE - printk(KERN_INFO "Status mode off.\n"); -#endif - sDisRxStatusMode(cp); - } - } else { - /* - * we aren't in status mode, so read down the FIFO two - * characters at time by doing repeated word IO - * transfer. - */ - space = tty_prepare_flip_string(tty, &cbuf, ToRecv); - if (space < ToRecv) { -#ifdef ROCKET_DEBUG_RECEIVE - printk(KERN_INFO "rp_do_receive:insufficient space ToRecv=%d space=%d\n", ToRecv, space); -#endif - if (space <= 0) - return; - ToRecv = space; - } - wRecv = ToRecv >> 1; - if (wRecv) - sInStrW(sGetTxRxDataIO(cp), (unsigned short *) cbuf, wRecv); - if (ToRecv & 1) - cbuf[ToRecv - 1] = sInB(sGetTxRxDataIO(cp)); - } - /* Push the data up to the tty layer */ - tty_flip_buffer_push(tty); -} - -/* - * Serial port transmit data function. Called from the timer polling loop as a - * result of a bit set in xmit_flags[], indicating data (from the tty layer) is ready - * to be sent out the serial port. Data is buffered in rp_table[line].xmit_buf, it is - * moved to the port's xmit FIFO. *info is critical data, protected by spinlocks. - */ -static void rp_do_transmit(struct r_port *info) -{ - int c; - CHANNEL_t *cp = &info->channel; - struct tty_struct *tty; - unsigned long flags; - -#ifdef ROCKET_DEBUG_INTR - printk(KERN_DEBUG "%s\n", __func__); -#endif - if (!info) - return; - tty = tty_port_tty_get(&info->port); - - if (tty == NULL) { - printk(KERN_WARNING "rp: WARNING %s called with tty==NULL\n", __func__); - clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]); - return; - } - - spin_lock_irqsave(&info->slock, flags); - info->xmit_fifo_room = TXFIFO_SIZE - sGetTxCnt(cp); - - /* Loop sending data to FIFO until done or FIFO full */ - while (1) { - if (tty->stopped || tty->hw_stopped) - break; - c = min(info->xmit_fifo_room, info->xmit_cnt); - c = min(c, XMIT_BUF_SIZE - info->xmit_tail); - if (c <= 0 || info->xmit_fifo_room <= 0) - break; - sOutStrW(sGetTxRxDataIO(cp), (unsigned short *) (info->xmit_buf + info->xmit_tail), c / 2); - if (c & 1) - sOutB(sGetTxRxDataIO(cp), info->xmit_buf[info->xmit_tail + c - 1]); - info->xmit_tail += c; - info->xmit_tail &= XMIT_BUF_SIZE - 1; - info->xmit_cnt -= c; - info->xmit_fifo_room -= c; -#ifdef ROCKET_DEBUG_INTR - printk(KERN_INFO "tx %d chars...\n", c); -#endif - } - - if (info->xmit_cnt == 0) - clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]); - - if (info->xmit_cnt < WAKEUP_CHARS) { - tty_wakeup(tty); -#ifdef ROCKETPORT_HAVE_POLL_WAIT - wake_up_interruptible(&tty->poll_wait); -#endif - } - - spin_unlock_irqrestore(&info->slock, flags); - tty_kref_put(tty); - -#ifdef ROCKET_DEBUG_INTR - printk(KERN_DEBUG "(%d,%d,%d,%d)...\n", info->xmit_cnt, info->xmit_head, - info->xmit_tail, info->xmit_fifo_room); -#endif -} - -/* - * Called when a serial port signals it has read data in it's RX FIFO. - * It checks what interrupts are pending and services them, including - * receiving serial data. - */ -static void rp_handle_port(struct r_port *info) -{ - CHANNEL_t *cp; - struct tty_struct *tty; - unsigned int IntMask, ChanStatus; - - if (!info) - return; - - if ((info->port.flags & ASYNC_INITIALIZED) == 0) { - printk(KERN_WARNING "rp: WARNING: rp_handle_port called with " - "info->flags & NOT_INIT\n"); - return; - } - tty = tty_port_tty_get(&info->port); - if (!tty) { - printk(KERN_WARNING "rp: WARNING: rp_handle_port called with " - "tty==NULL\n"); - return; - } - cp = &info->channel; - - IntMask = sGetChanIntID(cp) & info->intmask; -#ifdef ROCKET_DEBUG_INTR - printk(KERN_INFO "rp_interrupt %02x...\n", IntMask); -#endif - ChanStatus = sGetChanStatus(cp); - if (IntMask & RXF_TRIG) { /* Rx FIFO trigger level */ - rp_do_receive(info, tty, cp, ChanStatus); - } - if (IntMask & DELTA_CD) { /* CD change */ -#if (defined(ROCKET_DEBUG_OPEN) || defined(ROCKET_DEBUG_INTR) || defined(ROCKET_DEBUG_HANGUP)) - printk(KERN_INFO "ttyR%d CD now %s...\n", info->line, - (ChanStatus & CD_ACT) ? "on" : "off"); -#endif - if (!(ChanStatus & CD_ACT) && info->cd_status) { -#ifdef ROCKET_DEBUG_HANGUP - printk(KERN_INFO "CD drop, calling hangup.\n"); -#endif - tty_hangup(tty); - } - info->cd_status = (ChanStatus & CD_ACT) ? 1 : 0; - wake_up_interruptible(&info->port.open_wait); - } -#ifdef ROCKET_DEBUG_INTR - if (IntMask & DELTA_CTS) { /* CTS change */ - printk(KERN_INFO "CTS change...\n"); - } - if (IntMask & DELTA_DSR) { /* DSR change */ - printk(KERN_INFO "DSR change...\n"); - } -#endif - tty_kref_put(tty); -} - -/* - * The top level polling routine. Repeats every 1/100 HZ (10ms). - */ -static void rp_do_poll(unsigned long dummy) -{ - CONTROLLER_t *ctlp; - int ctrl, aiop, ch, line; - unsigned int xmitmask, i; - unsigned int CtlMask; - unsigned char AiopMask; - Word_t bit; - - /* Walk through all the boards (ctrl's) */ - for (ctrl = 0; ctrl < max_board; ctrl++) { - if (rcktpt_io_addr[ctrl] <= 0) - continue; - - /* Get a ptr to the board's control struct */ - ctlp = sCtlNumToCtlPtr(ctrl); - - /* Get the interrupt status from the board */ -#ifdef CONFIG_PCI - if (ctlp->BusType == isPCI) - CtlMask = sPCIGetControllerIntStatus(ctlp); - else -#endif - CtlMask = sGetControllerIntStatus(ctlp); - - /* Check if any AIOP read bits are set */ - for (aiop = 0; CtlMask; aiop++) { - bit = ctlp->AiopIntrBits[aiop]; - if (CtlMask & bit) { - CtlMask &= ~bit; - AiopMask = sGetAiopIntStatus(ctlp, aiop); - - /* Check if any port read bits are set */ - for (ch = 0; AiopMask; AiopMask >>= 1, ch++) { - if (AiopMask & 1) { - - /* Get the line number (/dev/ttyRx number). */ - /* Read the data from the port. */ - line = GetLineNumber(ctrl, aiop, ch); - rp_handle_port(rp_table[line]); - } - } - } - } - - xmitmask = xmit_flags[ctrl]; - - /* - * xmit_flags contains bit-significant flags, indicating there is data - * to xmit on the port. Bit 0 is port 0 on this board, bit 1 is port - * 1, ... (32 total possible). The variable i has the aiop and ch - * numbers encoded in it (port 0-7 are aiop0, 8-15 are aiop1, etc). - */ - if (xmitmask) { - for (i = 0; i < rocketModel[ctrl].numPorts; i++) { - if (xmitmask & (1 << i)) { - aiop = (i & 0x18) >> 3; - ch = i & 0x07; - line = GetLineNumber(ctrl, aiop, ch); - rp_do_transmit(rp_table[line]); - } - } - } - } - - /* - * Reset the timer so we get called at the next clock tick (10ms). - */ - if (atomic_read(&rp_num_ports_open)) - mod_timer(&rocket_timer, jiffies + POLL_PERIOD); -} - -/* - * Initializes the r_port structure for a port, as well as enabling the port on - * the board. - * Inputs: board, aiop, chan numbers - */ -static void init_r_port(int board, int aiop, int chan, struct pci_dev *pci_dev) -{ - unsigned rocketMode; - struct r_port *info; - int line; - CONTROLLER_T *ctlp; - - /* Get the next available line number */ - line = SetLineNumber(board, aiop, chan); - - ctlp = sCtlNumToCtlPtr(board); - - /* Get a r_port struct for the port, fill it in and save it globally, indexed by line number */ - info = kzalloc(sizeof (struct r_port), GFP_KERNEL); - if (!info) { - printk(KERN_ERR "Couldn't allocate info struct for line #%d\n", - line); - return; - } - - info->magic = RPORT_MAGIC; - info->line = line; - info->ctlp = ctlp; - info->board = board; - info->aiop = aiop; - info->chan = chan; - tty_port_init(&info->port); - info->port.ops = &rocket_port_ops; - init_completion(&info->close_wait); - info->flags &= ~ROCKET_MODE_MASK; - switch (pc104[board][line]) { - case 422: - info->flags |= ROCKET_MODE_RS422; - break; - case 485: - info->flags |= ROCKET_MODE_RS485; - break; - case 232: - default: - info->flags |= ROCKET_MODE_RS232; - break; - } - - info->intmask = RXF_TRIG | TXFIFO_MT | SRC_INT | DELTA_CD | DELTA_CTS | DELTA_DSR; - if (sInitChan(ctlp, &info->channel, aiop, chan) == 0) { - printk(KERN_ERR "RocketPort sInitChan(%d, %d, %d) failed!\n", - board, aiop, chan); - kfree(info); - return; - } - - rocketMode = info->flags & ROCKET_MODE_MASK; - - if ((info->flags & ROCKET_RTS_TOGGLE) || (rocketMode == ROCKET_MODE_RS485)) - sEnRTSToggle(&info->channel); - else - sDisRTSToggle(&info->channel); - - if (ctlp->boardType == ROCKET_TYPE_PC104) { - switch (rocketMode) { - case ROCKET_MODE_RS485: - sSetInterfaceMode(&info->channel, InterfaceModeRS485); - break; - case ROCKET_MODE_RS422: - sSetInterfaceMode(&info->channel, InterfaceModeRS422); - break; - case ROCKET_MODE_RS232: - default: - if (info->flags & ROCKET_RTS_TOGGLE) - sSetInterfaceMode(&info->channel, InterfaceModeRS232T); - else - sSetInterfaceMode(&info->channel, InterfaceModeRS232); - break; - } - } - spin_lock_init(&info->slock); - mutex_init(&info->write_mtx); - rp_table[line] = info; - tty_register_device(rocket_driver, line, pci_dev ? &pci_dev->dev : - NULL); -} - -/* - * Configures a rocketport port according to its termio settings. Called from - * user mode into the driver (exception handler). *info CD manipulation is spinlock protected. - */ -static void configure_r_port(struct tty_struct *tty, struct r_port *info, - struct ktermios *old_termios) -{ - unsigned cflag; - unsigned long flags; - unsigned rocketMode; - int bits, baud, divisor; - CHANNEL_t *cp; - struct ktermios *t = tty->termios; - - cp = &info->channel; - cflag = t->c_cflag; - - /* Byte size and parity */ - if ((cflag & CSIZE) == CS8) { - sSetData8(cp); - bits = 10; - } else { - sSetData7(cp); - bits = 9; - } - if (cflag & CSTOPB) { - sSetStop2(cp); - bits++; - } else { - sSetStop1(cp); - } - - if (cflag & PARENB) { - sEnParity(cp); - bits++; - if (cflag & PARODD) { - sSetOddParity(cp); - } else { - sSetEvenParity(cp); - } - } else { - sDisParity(cp); - } - - /* baud rate */ - baud = tty_get_baud_rate(tty); - if (!baud) - baud = 9600; - divisor = ((rp_baud_base[info->board] + (baud >> 1)) / baud) - 1; - if ((divisor >= 8192 || divisor < 0) && old_termios) { - baud = tty_termios_baud_rate(old_termios); - if (!baud) - baud = 9600; - divisor = (rp_baud_base[info->board] / baud) - 1; - } - if (divisor >= 8192 || divisor < 0) { - baud = 9600; - divisor = (rp_baud_base[info->board] / baud) - 1; - } - info->cps = baud / bits; - sSetBaud(cp, divisor); - - /* FIXME: Should really back compute a baud rate from the divisor */ - tty_encode_baud_rate(tty, baud, baud); - - if (cflag & CRTSCTS) { - info->intmask |= DELTA_CTS; - sEnCTSFlowCtl(cp); - } else { - info->intmask &= ~DELTA_CTS; - sDisCTSFlowCtl(cp); - } - if (cflag & CLOCAL) { - info->intmask &= ~DELTA_CD; - } else { - spin_lock_irqsave(&info->slock, flags); - if (sGetChanStatus(cp) & CD_ACT) - info->cd_status = 1; - else - info->cd_status = 0; - info->intmask |= DELTA_CD; - spin_unlock_irqrestore(&info->slock, flags); - } - - /* - * Handle software flow control in the board - */ -#ifdef ROCKET_SOFT_FLOW - if (I_IXON(tty)) { - sEnTxSoftFlowCtl(cp); - if (I_IXANY(tty)) { - sEnIXANY(cp); - } else { - sDisIXANY(cp); - } - sSetTxXONChar(cp, START_CHAR(tty)); - sSetTxXOFFChar(cp, STOP_CHAR(tty)); - } else { - sDisTxSoftFlowCtl(cp); - sDisIXANY(cp); - sClrTxXOFF(cp); - } -#endif - - /* - * Set up ignore/read mask words - */ - info->read_status_mask = STMRCVROVRH | 0xFF; - if (I_INPCK(tty)) - info->read_status_mask |= STMFRAMEH | STMPARITYH; - if (I_BRKINT(tty) || I_PARMRK(tty)) - info->read_status_mask |= STMBREAKH; - - /* - * Characters to ignore - */ - info->ignore_status_mask = 0; - if (I_IGNPAR(tty)) - info->ignore_status_mask |= STMFRAMEH | STMPARITYH; - if (I_IGNBRK(tty)) { - info->ignore_status_mask |= STMBREAKH; - /* - * If we're ignoring parity and break indicators, - * ignore overruns too. (For real raw support). - */ - if (I_IGNPAR(tty)) - info->ignore_status_mask |= STMRCVROVRH; - } - - rocketMode = info->flags & ROCKET_MODE_MASK; - - if ((info->flags & ROCKET_RTS_TOGGLE) - || (rocketMode == ROCKET_MODE_RS485)) - sEnRTSToggle(cp); - else - sDisRTSToggle(cp); - - sSetRTS(&info->channel); - - if (cp->CtlP->boardType == ROCKET_TYPE_PC104) { - switch (rocketMode) { - case ROCKET_MODE_RS485: - sSetInterfaceMode(cp, InterfaceModeRS485); - break; - case ROCKET_MODE_RS422: - sSetInterfaceMode(cp, InterfaceModeRS422); - break; - case ROCKET_MODE_RS232: - default: - if (info->flags & ROCKET_RTS_TOGGLE) - sSetInterfaceMode(cp, InterfaceModeRS232T); - else - sSetInterfaceMode(cp, InterfaceModeRS232); - break; - } - } -} - -static int carrier_raised(struct tty_port *port) -{ - struct r_port *info = container_of(port, struct r_port, port); - return (sGetChanStatusLo(&info->channel) & CD_ACT) ? 1 : 0; -} - -static void dtr_rts(struct tty_port *port, int on) -{ - struct r_port *info = container_of(port, struct r_port, port); - if (on) { - sSetDTR(&info->channel); - sSetRTS(&info->channel); - } else { - sClrDTR(&info->channel); - sClrRTS(&info->channel); - } -} - -/* - * Exception handler that opens a serial port. Creates xmit_buf storage, fills in - * port's r_port struct. Initializes the port hardware. - */ -static int rp_open(struct tty_struct *tty, struct file *filp) -{ - struct r_port *info; - struct tty_port *port; - int line = 0, retval; - CHANNEL_t *cp; - unsigned long page; - - line = tty->index; - if (line < 0 || line >= MAX_RP_PORTS || ((info = rp_table[line]) == NULL)) - return -ENXIO; - port = &info->port; - - page = __get_free_page(GFP_KERNEL); - if (!page) - return -ENOMEM; - - if (port->flags & ASYNC_CLOSING) { - retval = wait_for_completion_interruptible(&info->close_wait); - free_page(page); - if (retval) - return retval; - return ((port->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN : -ERESTARTSYS); - } - - /* - * We must not sleep from here until the port is marked fully in use. - */ - if (info->xmit_buf) - free_page(page); - else - info->xmit_buf = (unsigned char *) page; - - tty->driver_data = info; - tty_port_tty_set(port, tty); - - if (port->count++ == 0) { - atomic_inc(&rp_num_ports_open); - -#ifdef ROCKET_DEBUG_OPEN - printk(KERN_INFO "rocket mod++ = %d...\n", - atomic_read(&rp_num_ports_open)); -#endif - } -#ifdef ROCKET_DEBUG_OPEN - printk(KERN_INFO "rp_open ttyR%d, count=%d\n", info->line, info->port.count); -#endif - - /* - * Info->count is now 1; so it's safe to sleep now. - */ - if (!test_bit(ASYNCB_INITIALIZED, &port->flags)) { - cp = &info->channel; - sSetRxTrigger(cp, TRIG_1); - if (sGetChanStatus(cp) & CD_ACT) - info->cd_status = 1; - else - info->cd_status = 0; - sDisRxStatusMode(cp); - sFlushRxFIFO(cp); - sFlushTxFIFO(cp); - - sEnInterrupts(cp, (TXINT_EN | MCINT_EN | RXINT_EN | SRCINT_EN | CHANINT_EN)); - sSetRxTrigger(cp, TRIG_1); - - sGetChanStatus(cp); - sDisRxStatusMode(cp); - sClrTxXOFF(cp); - - sDisCTSFlowCtl(cp); - sDisTxSoftFlowCtl(cp); - - sEnRxFIFO(cp); - sEnTransmit(cp); - - set_bit(ASYNCB_INITIALIZED, &info->port.flags); - - /* - * Set up the tty->alt_speed kludge - */ - if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_HI) - tty->alt_speed = 57600; - if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_VHI) - tty->alt_speed = 115200; - if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_SHI) - tty->alt_speed = 230400; - if ((info->flags & ROCKET_SPD_MASK) == ROCKET_SPD_WARP) - tty->alt_speed = 460800; - - configure_r_port(tty, info, NULL); - if (tty->termios->c_cflag & CBAUD) { - sSetDTR(cp); - sSetRTS(cp); - } - } - /* Starts (or resets) the maint polling loop */ - mod_timer(&rocket_timer, jiffies + POLL_PERIOD); - - retval = tty_port_block_til_ready(port, tty, filp); - if (retval) { -#ifdef ROCKET_DEBUG_OPEN - printk(KERN_INFO "rp_open returning after block_til_ready with %d\n", retval); -#endif - return retval; - } - return 0; -} - -/* - * Exception handler that closes a serial port. info->port.count is considered critical. - */ -static void rp_close(struct tty_struct *tty, struct file *filp) -{ - struct r_port *info = tty->driver_data; - struct tty_port *port = &info->port; - int timeout; - CHANNEL_t *cp; - - if (rocket_paranoia_check(info, "rp_close")) - return; - -#ifdef ROCKET_DEBUG_OPEN - printk(KERN_INFO "rp_close ttyR%d, count = %d\n", info->line, info->port.count); -#endif - - if (tty_port_close_start(port, tty, filp) == 0) - return; - - mutex_lock(&port->mutex); - cp = &info->channel; - /* - * Before we drop DTR, make sure the UART transmitter - * has completely drained; this is especially - * important if there is a transmit FIFO! - */ - timeout = (sGetTxCnt(cp) + 1) * HZ / info->cps; - if (timeout == 0) - timeout = 1; - rp_wait_until_sent(tty, timeout); - clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]); - - sDisTransmit(cp); - sDisInterrupts(cp, (TXINT_EN | MCINT_EN | RXINT_EN | SRCINT_EN | CHANINT_EN)); - sDisCTSFlowCtl(cp); - sDisTxSoftFlowCtl(cp); - sClrTxXOFF(cp); - sFlushRxFIFO(cp); - sFlushTxFIFO(cp); - sClrRTS(cp); - if (C_HUPCL(tty)) - sClrDTR(cp); - - rp_flush_buffer(tty); - - tty_ldisc_flush(tty); - - clear_bit((info->aiop * 8) + info->chan, (void *) &xmit_flags[info->board]); - - /* We can't yet use tty_port_close_end as the buffer handling in this - driver is a bit different to the usual */ - - if (port->blocked_open) { - if (port->close_delay) { - msleep_interruptible(jiffies_to_msecs(port->close_delay)); - } - wake_up_interruptible(&port->open_wait); - } else { - if (info->xmit_buf) { - free_page((unsigned long) info->xmit_buf); - info->xmit_buf = NULL; - } - } - spin_lock_irq(&port->lock); - info->port.flags &= ~(ASYNC_INITIALIZED | ASYNC_CLOSING | ASYNC_NORMAL_ACTIVE); - tty->closing = 0; - spin_unlock_irq(&port->lock); - mutex_unlock(&port->mutex); - tty_port_tty_set(port, NULL); - - wake_up_interruptible(&port->close_wait); - complete_all(&info->close_wait); - atomic_dec(&rp_num_ports_open); - -#ifdef ROCKET_DEBUG_OPEN - printk(KERN_INFO "rocket mod-- = %d...\n", - atomic_read(&rp_num_ports_open)); - printk(KERN_INFO "rp_close ttyR%d complete shutdown\n", info->line); -#endif - -} - -static void rp_set_termios(struct tty_struct *tty, - struct ktermios *old_termios) -{ - struct r_port *info = tty->driver_data; - CHANNEL_t *cp; - unsigned cflag; - - if (rocket_paranoia_check(info, "rp_set_termios")) - return; - - cflag = tty->termios->c_cflag; - - /* - * This driver doesn't support CS5 or CS6 - */ - if (((cflag & CSIZE) == CS5) || ((cflag & CSIZE) == CS6)) - tty->termios->c_cflag = - ((cflag & ~CSIZE) | (old_termios->c_cflag & CSIZE)); - /* Or CMSPAR */ - tty->termios->c_cflag &= ~CMSPAR; - - configure_r_port(tty, info, old_termios); - - cp = &info->channel; - - /* Handle transition to B0 status */ - if ((old_termios->c_cflag & CBAUD) && !(tty->termios->c_cflag & CBAUD)) { - sClrDTR(cp); - sClrRTS(cp); - } - - /* Handle transition away from B0 status */ - if (!(old_termios->c_cflag & CBAUD) && (tty->termios->c_cflag & CBAUD)) { - if (!tty->hw_stopped || !(tty->termios->c_cflag & CRTSCTS)) - sSetRTS(cp); - sSetDTR(cp); - } - - if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios->c_cflag & CRTSCTS)) { - tty->hw_stopped = 0; - rp_start(tty); - } -} - -static int rp_break(struct tty_struct *tty, int break_state) -{ - struct r_port *info = tty->driver_data; - unsigned long flags; - - if (rocket_paranoia_check(info, "rp_break")) - return -EINVAL; - - spin_lock_irqsave(&info->slock, flags); - if (break_state == -1) - sSendBreak(&info->channel); - else - sClrBreak(&info->channel); - spin_unlock_irqrestore(&info->slock, flags); - return 0; -} - -/* - * sGetChanRI used to be a macro in rocket_int.h. When the |