patch-1.3.94 linux/drivers/char/riscom8.c
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- Lines: 1900
- Date:
Mon Apr 22 07:14:01 1996
- Orig file:
v1.3.93/linux/drivers/char/riscom8.c
- Orig date:
Thu Jan 1 02:00:00 1970
diff -u --recursive --new-file v1.3.93/linux/drivers/char/riscom8.c linux/drivers/char/riscom8.c
@@ -0,0 +1,1899 @@
+/*
+ * linux/drivers/char/riscom.c -- RISCom/8 multiport serial driver.
+ *
+ * Copyright (C) 1994-1996 Dmitry Gorodchanin (begemot@bgm.rosprint.net)
+ *
+ * This code is loosely based on the Linux serial driver, written by
+ * Linus Torvalds, Theodore T'so and others. The RISCom/8 card
+ * programming info was obtained from various drivers for other OSes
+ * (FreeBSD, ISC, etc), but no source code from those drivers were
+ * directly included in this drvier.
+ *
+ *
+ * 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.
+ *
+ * Revision 1.0
+ */
+
+#include <linux/module.h>
+
+#include <asm/io.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/ioport.h>
+#include <linux/interrupt.h>
+#include <linux/errno.h>
+#include <linux/tty.h>
+#include <linux/mm.h>
+#include <linux/serial.h>
+#include <linux/fcntl.h>
+#include <linux/major.h>
+
+#include "riscom8.h"
+#include "riscom8_reg.h"
+
+/* Am I paranoid or not ? ;-) */
+#define RISCOM_PARANOIA_CHECK
+
+/*
+ * Crazy InteliCom/8 boards sometimes has swapped CTS & DSR signals.
+ * You can slightly speed up things by #undefing the following option,
+ * if you are REALLY sure that your board is correct one.
+ */
+
+#define RISCOM_BRAIN_DAMAGED_CTS
+
+/*
+ * The following defines are mostly for testing purposes. But if you need
+ * some nice reporting in your syslog, you can define them also.
+ */
+#undef RC_REPORT_FIFO
+#undef RC_REPORT_OVERRUN
+
+
+#define RISCOM_LEGAL_FLAGS \
+ (ASYNC_HUP_NOTIFY | ASYNC_SAK | ASYNC_SPLIT_TERMIOS | \
+ ASYNC_SPD_HI | ASYNC_SPEED_VHI | ASYNC_SESSION_LOCKOUT | \
+ ASYNC_PGRP_LOCKOUT | ASYNC_CALLOUT_NOHUP)
+
+#ifndef MIN
+#define MIN(a,b) ((a) < (b) ? (a) : (b))
+#endif
+
+DECLARE_TASK_QUEUE(tq_riscom);
+
+#define RISCOM_TYPE_NORMAL 1
+#define RISCOM_TYPE_CALLOUT 2
+
+static struct riscom_board * IRQ_to_board[16] = { NULL, } ;
+static struct tty_driver riscom_driver, riscom_callout_driver;
+static int riscom_refcount = 0;
+static struct tty_struct * riscom_table[RC_NBOARD * RC_NPORT] = { NULL, };
+static struct termios * riscom_termios[RC_NBOARD * RC_NPORT] = { NULL, };
+static struct termios * riscom_termios_locked[RC_NBOARD * RC_NPORT] = { NULL, };
+static unsigned char * tmp_buf = NULL;
+static struct semaphore tmp_buf_sem = MUTEX;
+
+static unsigned long baud_table[] = {
+ 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
+ 9600, 19200, 38400, 57600, 76800, 0,
+};
+
+static struct riscom_board rc_board[RC_NBOARD] = {
+ { 0, RC_IOBASE1, 0, },
+ { 0, RC_IOBASE2, 0, },
+ { 0, RC_IOBASE3, 0, },
+ { 0, RC_IOBASE4, 0, },
+};
+
+static struct riscom_port rc_port[RC_NBOARD * RC_NPORT] = {
+ { 0, },
+};
+
+/* RISCom/8 I/O ports addresses (without address translation) */
+static unsigned short rc_ioport[] = {
+#if 1
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x09, 0x0a, 0x0b, 0x0c,
+#else
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x09, 0x0a, 0x0b, 0x0c, 0x10,
+ 0x11, 0x12, 0x18, 0x28, 0x31, 0x32, 0x39, 0x3a, 0x40, 0x41, 0x61, 0x62,
+ 0x63, 0x64, 0x6b, 0x70, 0x71, 0x78, 0x7a, 0x7b, 0x7f, 0x100, 0x101
+#endif
+};
+#define RC_NIOPORT (sizeof(rc_ioport) / sizeof(rc_ioport[0]))
+
+
+static inline int rc_paranoia_check(struct riscom_port const * port,
+ kdev_t device, const char *routine)
+{
+#ifdef RISCOM_PARANOIA_CHECK
+ static const char *badmagic =
+ "rc: Warning: bad riscom port magic number for device %s in %s\n";
+ static const char *badinfo =
+ "rc: Warning: null riscom port for device %s in %s\n";
+
+ if (!port) {
+ printk(badinfo, kdevname(device), routine);
+ return 1;
+ }
+ if (port->magic != RISCOM8_MAGIC) {
+ printk(badmagic, kdevname(device), routine);
+ return 1;
+ }
+#endif
+ return 0;
+}
+
+/*
+ *
+ * Service functions for RISCom/8 driver.
+ *
+ */
+
+/* Get board number from pointer */
+extern inline int board_No (struct riscom_board const * bp)
+{
+ return bp - rc_board;
+}
+
+/* Get port number from pointer */
+extern inline int port_No (struct riscom_port const * port)
+{
+ return RC_PORT(port - rc_port);
+}
+
+/* Get pointer to board from pointer to port */
+extern inline struct riscom_board * port_Board(struct riscom_port const * port)
+{
+ return &rc_board[RC_BOARD(port - rc_port)];
+}
+
+/* Input Byte from CL CD180 register */
+extern inline unsigned char rc_in(struct riscom_board const * bp, unsigned short reg)
+{
+ return inb(bp->base + RC_TO_ISA(reg));
+}
+
+/* Output Byte to CL CD180 register */
+extern inline void rc_out(struct riscom_board const * bp, unsigned short reg,
+ unsigned char val)
+{
+ outb(val, bp->base + RC_TO_ISA(reg));
+}
+
+/* Wait for Chanel Command Register ready */
+extern inline void rc_wait_CCR(struct riscom_board const * bp)
+{
+ unsigned long delay;
+
+ /* FIXME: need something more descriptive then 100000 :) */
+ for (delay = 100000; delay; delay--)
+ if (!rc_in(bp, CD180_CCR))
+ return;
+
+ printk("rc%d: Timeout waiting for CCR.\n", board_No(bp));
+}
+
+/*
+ * RISCom/8 probe functions.
+ */
+
+extern inline int rc_check_io_range(struct riscom_board * const bp)
+{
+ int i;
+
+ for (i = 0; i < RC_NIOPORT; i++)
+ if (check_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1)) {
+ printk("rc%d: Skipping probe at 0x%03x. I/O adress in use.\n",
+ board_No(bp), bp->base);
+ return 1;
+ }
+ return 0;
+}
+
+extern inline void rc_request_io_range(struct riscom_board * const bp)
+{
+ int i;
+
+ for (i = 0; i < RC_NIOPORT; i++)
+ request_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1, "RISCom/8" );
+}
+
+extern inline void rc_release_io_range(struct riscom_board * const bp)
+{
+ int i;
+
+ for (i = 0; i < RC_NIOPORT; i++)
+ release_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1);
+}
+
+
+/* Must be called with enabled interrupts */
+extern inline void rc_long_delay(unsigned long delay)
+{
+ unsigned long i;
+
+ for (i = jiffies + delay; i > jiffies; ) ;
+}
+
+/* Reset and setup CD180 chip */
+static void rc_init_CD180(struct riscom_board const * bp)
+{
+ unsigned long flags;
+
+ save_flags(flags); cli();
+ rc_out(bp, RC_CTOUT, 0); /* Clear timeout */
+ rc_wait_CCR(bp); /* Wait for CCR ready */
+ rc_out(bp, CD180_CCR, CCR_HARDRESET); /* Reset CD180 chip */
+ sti();
+ rc_long_delay(HZ/20); /* Delay 0.05 sec */
+ cli();
+ rc_out(bp, CD180_GIVR, RC_ID); /* Set ID for this chip */
+ rc_out(bp, CD180_GICR, 0); /* Clear all bits */
+ rc_out(bp, CD180_PILR1, RC_ACK_MINT); /* Prio for modem intr */
+ rc_out(bp, CD180_PILR2, RC_ACK_TINT); /* Prio for transmitter intr */
+ rc_out(bp, CD180_PILR3, RC_ACK_RINT); /* Prio for receiver intr */
+
+ /* Setting up prescaler. We need 4 ticks per 1 ms */
+ rc_out(bp, CD180_PPRH, (RC_OSCFREQ/(1000000/RISCOM_TPS)) >> 8);
+ rc_out(bp, CD180_PPRL, (RC_OSCFREQ/(1000000/RISCOM_TPS)) & 0xff);
+
+ restore_flags(flags);
+}
+
+/* Main probing routine, also sets irq. */
+static int rc_probe(struct riscom_board *bp)
+{
+ unsigned char val1, val2;
+ int irqs = 0;
+ int retries;
+
+ bp->irq = 0;
+
+ if (rc_check_io_range(bp))
+ return 1;
+
+ /* Are the I/O ports here ? */
+ rc_out(bp, CD180_PPRL, 0x5a);
+ outb(0xff, 0x80);
+ val1 = rc_in(bp, CD180_PPRL);
+ rc_out(bp, CD180_PPRL, 0xa5);
+ outb(0x00, 0x80);
+ val2 = rc_in(bp, CD180_PPRL);
+
+ if ((val1 != 0x5a) || (val2 != 0xa5)) {
+ printk("rc%d: RISCom/8 Board at 0x%03x not found.\n",
+ board_No(bp), bp->base);
+ return 1;
+ }
+
+ /* It's time to find IRQ for this board */
+ for (retries = 0; retries < 5 && irqs <= 0; retries++) {
+ irqs = probe_irq_on();
+ rc_init_CD180(bp); /* Reset CD180 chip */
+ rc_out(bp, CD180_CAR, 2); /* Select port 2 */
+ rc_wait_CCR(bp);
+ rc_out(bp, CD180_CCR, CCR_TXEN); /* Enable transmitter */
+ rc_out(bp, CD180_IER, IER_TXRDY); /* Enable tx empty intr */
+ rc_long_delay(HZ/20);
+ irqs = probe_irq_off(irqs);
+ val1 = rc_in(bp, RC_BSR); /* Get Board Status reg */
+ val2 = rc_in(bp, RC_ACK_TINT); /* ACK interrupt */
+ rc_init_CD180(bp); /* Reset CD180 again */
+
+ if ((val1 & RC_BSR_TINT) || (val2 != (RC_ID | GIVR_IT_TX))) {
+ printk("rc%d: RISCom/8 Board at 0x%03x not found.\n",
+ board_No(bp), bp->base);
+ return 1;
+ }
+ }
+
+ if (irqs <= 0) {
+ printk("rc%d: Can't find IRQ for RISCom/8 board at 0x%03x.\n",
+ board_No(bp), bp->base);
+ return 1;
+ }
+ rc_request_io_range(bp);
+ bp->irq = irqs;
+ bp->flags |= RC_BOARD_PRESENT;
+
+ printk("rc%d: RISCom/8 Rev. %c board detected at 0x%03x, IRQ %d.\n",
+ board_No(bp),
+ (rc_in(bp, CD180_GFRCR) & 0x0f) + 'A', /* Board revision */
+ bp->base, bp->irq);
+
+ return 0;
+}
+
+/*
+ *
+ * Inerrupt processing routines.
+ *
+ */
+
+extern inline void rc_mark_event(struct riscom_port * port, int event)
+{
+ /*
+ * I'm not quite happy with current scheme all serial
+ * drivers use their own BH routine.
+ * It seem's this easily can be done with one BH routine
+ * serving for all serial drivers.
+ * For now I must introduce another one - RISCOM8_BH.
+ * Still hope this will be changed in near future.
+ */
+ set_bit(event, &port->event);
+ queue_task_irq_off(&port->tqueue, &tq_riscom);
+ mark_bh(RISCOM8_BH);
+}
+
+extern inline struct riscom_port * rc_get_port(struct riscom_board const * bp,
+ unsigned char const * what)
+{
+ unsigned char channel;
+ struct riscom_port * port;
+
+ channel = rc_in(bp, CD180_GICR) >> GICR_CHAN_OFF;
+ if (channel < CD180_NCH) {
+ port = &rc_port[board_No(bp) * RC_NPORT + channel];
+ if (port->flags & ASYNC_INITIALIZED) {
+ return port;
+ }
+ }
+ printk("rc%d: %s interrupt from invalid port %d\n",
+ board_No(bp), what, channel);
+ return NULL;
+}
+
+extern inline void rc_receive_exc(struct riscom_board const * bp)
+{
+ struct riscom_port *port;
+ struct tty_struct *tty;
+ unsigned char status;
+ unsigned char ch;
+
+ if (!(port = rc_get_port(bp, "Receive")))
+ return;
+
+ tty = port->tty;
+ if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
+ printk("rc%d: port %d: Working around flip buffer overflow.\n",
+ board_No(bp), port_No(port));
+ return;
+ }
+
+#ifdef RC_REPORT_OVERRUN
+ status = rc_in(bp, CD180_RCSR);
+ if (status & RCSR_OE) {
+ port->overrun++;
+#if 0
+ printk("rc%d: port %d: Overrun. Total %ld overruns.\n",
+ board_No(bp), port_No(port), port->overrun);
+#endif
+ }
+ status &= port->mark_mask;
+#else
+ status = rc_in(bp, CD180_RCSR) & port->mark_mask;
+#endif
+ ch = rc_in(bp, CD180_RDR);
+ if (!status) {
+ return;
+ }
+ if (status & RCSR_TOUT) {
+ printk("rc%d: port %d: Receiver timeout. Hardware problems ?\n",
+ board_No(bp), port_No(port));
+ return;
+
+ } else if (status & RCSR_BREAK) {
+ printk("rc%d: port %d: Handling break...\n",
+ board_No(bp), port_No(port));
+ *tty->flip.flag_buf_ptr++ = TTY_BREAK;
+ if (port->flags & ASYNC_SAK)
+ do_SAK(tty);
+
+ } else if (status & RCSR_PE)
+ *tty->flip.flag_buf_ptr++ = TTY_PARITY;
+
+ else if (status & RCSR_FE)
+ *tty->flip.flag_buf_ptr++ = TTY_FRAME;
+
+ else if (status & RCSR_OE)
+ *tty->flip.flag_buf_ptr++ = TTY_OVERRUN;
+
+ else
+ *tty->flip.flag_buf_ptr++ = 0;
+
+ *tty->flip.char_buf_ptr++ = ch;
+ tty->flip.count++;
+ queue_task_irq_off(&tty->flip.tqueue, &tq_timer);
+}
+
+extern inline void rc_receive(struct riscom_board const * bp)
+{
+ struct riscom_port *port;
+ struct tty_struct *tty;
+ unsigned char count;
+
+ if (!(port = rc_get_port(bp, "Receive")))
+ return;
+
+ tty = port->tty;
+
+ count = rc_in(bp, CD180_RDCR);
+
+#ifdef RC_REPORT_FIFO
+ port->hits[count > 8 ? 9 : count]++;
+#endif
+
+ while (count--) {
+ if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
+ printk("rc%d: port %d: Working around flip buffer overflow.\n",
+ board_No(bp), port_No(port));
+ break;
+ }
+ *tty->flip.char_buf_ptr++ = rc_in(bp, CD180_RDR);
+ *tty->flip.flag_buf_ptr++ = 0;
+ tty->flip.count++;
+ }
+ queue_task_irq_off(&tty->flip.tqueue, &tq_timer);
+}
+
+extern inline void rc_transmit(struct riscom_board const * bp)
+{
+ struct riscom_port *port;
+ struct tty_struct *tty;
+ unsigned char count;
+
+
+ if (!(port = rc_get_port(bp, "Transmit")))
+ return;
+
+ tty = port->tty;
+
+ if (port->IER & IER_TXEMPTY) {
+ /* FIFO drained */
+ rc_out(bp, CD180_CAR, port_No(port));
+ port->IER &= ~IER_TXEMPTY;
+ rc_out(bp, CD180_IER, port->IER);
+ return;
+ }
+
+ if ((port->xmit_cnt <= 0 && !port->break_length)
+ || tty->stopped || tty->hw_stopped) {
+ rc_out(bp, CD180_CAR, port_No(port));
+ port->IER &= ~IER_TXRDY;
+ rc_out(bp, CD180_IER, port->IER);
+ return;
+ }
+
+ if (port->break_length) {
+ if (port->break_length > 0) {
+ if (port->COR2 & COR2_ETC) {
+ rc_out(bp, CD180_TDR, CD180_C_ESC);
+ rc_out(bp, CD180_TDR, CD180_C_SBRK);
+ port->COR2 &= ~COR2_ETC;
+ }
+ count = MIN(port->break_length, 0xff);
+ rc_out(bp, CD180_TDR, CD180_C_ESC);
+ rc_out(bp, CD180_TDR, CD180_C_DELAY);
+ rc_out(bp, CD180_TDR, count);
+ if (!(port->break_length -= count))
+ port->break_length--;
+ } else {
+ rc_out(bp, CD180_TDR, CD180_C_ESC);
+ rc_out(bp, CD180_TDR, CD180_C_EBRK);
+ rc_out(bp, CD180_COR2, port->COR2);
+ rc_wait_CCR(bp);
+ rc_out(bp, CD180_CCR, CCR_CORCHG2);
+ port->break_length = 0;
+ }
+ return;
+ }
+
+ count = CD180_NFIFO;
+ do {
+ rc_out(bp, CD180_TDR, port->xmit_buf[port->xmit_tail++]);
+ port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1);
+ if (--port->xmit_cnt <= 0)
+ break;
+ } while (--count > 0);
+
+ if (port->xmit_cnt <= 0) {
+ rc_out(bp, CD180_CAR, port_No(port));
+ port->IER &= ~IER_TXRDY;
+ rc_out(bp, CD180_IER, port->IER);
+ }
+ if (port->xmit_cnt <= port->wakeup_chars)
+ rc_mark_event(port, RS_EVENT_WRITE_WAKEUP);
+}
+
+extern inline void rc_check_modem(struct riscom_board const * bp)
+{
+ struct riscom_port *port;
+ struct tty_struct *tty;
+ unsigned char mcr;
+
+ if (!(port = rc_get_port(bp, "Modem")))
+ return;
+
+ tty = port->tty;
+
+ mcr = rc_in(bp, CD180_MCR);
+ if (mcr & MCR_CDCHG) {
+ if (rc_in(bp, CD180_MSVR) & MSVR_CD)
+ wake_up_interruptible(&port->open_wait);
+ else if (!((port->flags & ASYNC_CALLOUT_ACTIVE) &&
+ (port->flags & ASYNC_CALLOUT_NOHUP)))
+ queue_task_irq_off(&port->tqueue_hangup,
+ &tq_scheduler);
+ }
+
+#ifdef RISCOM_BRAIN_DAMAGED_CTS
+ if (mcr & MCR_CTSCHG) {
+ if (rc_in(bp, CD180_MSVR) & MSVR_CTS) {
+ tty->hw_stopped = 0;
+ port->IER |= IER_TXRDY;
+ if (port->xmit_cnt <= port->wakeup_chars)
+ rc_mark_event(port, RS_EVENT_WRITE_WAKEUP);
+ } else {
+ tty->hw_stopped = 1;
+ port->IER &= ~IER_TXRDY;
+ }
+ rc_out(bp, CD180_IER, port->IER);
+ }
+ if (mcr & MCR_DSRCHG) {
+ if (rc_in(bp, CD180_MSVR) & MSVR_DSR) {
+ tty->hw_stopped = 0;
+ port->IER |= IER_TXRDY;
+ if (port->xmit_cnt <= port->wakeup_chars)
+ rc_mark_event(port, RS_EVENT_WRITE_WAKEUP);
+ } else {
+ tty->hw_stopped = 1;
+ port->IER &= ~IER_TXRDY;
+ }
+ rc_out(bp, CD180_IER, port->IER);
+ }
+#endif /* RISCOM_BRAIN_DAMAGED_CTS */
+
+ /* Clear change bits */
+ rc_out(bp, CD180_MCR, 0);
+}
+
+/* The main interrupt processing routine */
+static void rc_interrupt(int irq, void * dev_id, struct pt_regs * regs)
+{
+ unsigned char status;
+ unsigned char ack;
+ struct riscom_board *bp;
+ unsigned long loop = 0;
+
+ bp = IRQ_to_board[irq];
+
+ if (!bp || !(bp->flags & RC_BOARD_ACTIVE)) {
+ return;
+ }
+
+ while ((++loop < 16) && ((status = ~(rc_in(bp, RC_BSR))) &
+ (RC_BSR_TOUT | RC_BSR_TINT |
+ RC_BSR_MINT | RC_BSR_RINT))) {
+
+ if (status & RC_BSR_TOUT)
+ printk("rc%d: Got timeout. Hardware error ?\n", board_No(bp));
+
+ else if (status & RC_BSR_RINT) {
+ ack = rc_in(bp, RC_ACK_RINT);
+
+ if (ack == (RC_ID | GIVR_IT_RCV))
+ rc_receive(bp);
+ else if (ack == (RC_ID | GIVR_IT_REXC))
+ rc_receive_exc(bp);
+ else
+ printk("rc%d: Bad receive ack 0x%02x.\n",
+ board_No(bp), ack);
+
+ } else if (status & RC_BSR_TINT) {
+ ack = rc_in(bp, RC_ACK_TINT);
+
+ if (ack == (RC_ID | GIVR_IT_TX))
+ rc_transmit(bp);
+ else
+ printk("rc%d: Bad transmit ack 0x%02x.\n",
+ board_No(bp), ack);
+
+ } else /* if (status & RC_BSR_MINT) */ {
+ ack = rc_in(bp, RC_ACK_MINT);
+
+ if (ack == (RC_ID | GIVR_IT_MODEM))
+ rc_check_modem(bp);
+ else
+ printk("rc%d: Bad modem ack 0x%02x.\n",
+ board_No(bp), ack);
+
+ }
+
+ rc_out(bp, CD180_EOIR, 0); /* Mark end of interrupt */
+ rc_out(bp, RC_CTOUT, 0); /* Clear timeout flag */
+ }
+}
+
+/*
+ * Routines for open & close processing.
+ */
+
+/* Called with disabled interrupts */
+extern inline int rc_setup_board(struct riscom_board * bp)
+{
+ int error;
+
+ if (bp->flags & RC_BOARD_ACTIVE)
+ return 0;
+
+ error = request_irq(bp->irq, rc_interrupt, SA_INTERRUPT, "RISCom/8", NULL);
+ if (error)
+ return error;
+
+ rc_out(bp, RC_CTOUT, 0); /* Just in case */
+ bp->DTR = ~0;
+ rc_out(bp, RC_DTR, bp->DTR); /* Drop DTR on all ports */
+
+ IRQ_to_board[bp->irq] = bp;
+ bp->flags |= RC_BOARD_ACTIVE;
+
+ MOD_INC_USE_COUNT;
+ return 0;
+}
+
+/* Called with disabled interrupts */
+extern inline void rc_shutdown_board(struct riscom_board *bp)
+{
+ if (!(bp->flags & RC_BOARD_ACTIVE))
+ return;
+
+ bp->flags &= ~RC_BOARD_ACTIVE;
+
+ free_irq(bp->irq, NULL);
+ IRQ_to_board[bp->irq] = NULL;
+
+ bp->DTR = ~0;
+ rc_out(bp, RC_DTR, bp->DTR); /* Drop DTR on all ports */
+
+ MOD_DEC_USE_COUNT;
+}
+
+/*
+ * Setting up port characteristics.
+ * Must be called with disabled interupts
+ */
+static void rc_change_speed(struct riscom_board *bp, struct riscom_port *port)
+{
+ struct tty_struct *tty;
+ unsigned long baud;
+ long tmp;
+ unsigned char cor1 = 0, cor3 = 0;
+ unsigned char mcor1 = 0, mcor2 = 0;
+
+ if (!(tty = port->tty) || !tty->termios)
+ return;
+
+ port->IER = 0;
+ port->COR2 = 0;
+ port->MSVR = MSVR_RTS;
+
+ baud = C_BAUD(tty);
+
+ if (baud & CBAUDEX) {
+ baud &= ~CBAUDEX;
+ if (baud < 1 || baud > 2)
+ port->tty->termios->c_cflag &= ~CBAUDEX;
+ else
+ baud += 15;
+ }
+ if (baud == 15) {
+ if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
+ baud ++;
+ if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
+ baud += 2;
+ }
+
+ /* Select port on the board */
+ rc_out(bp, CD180_CAR, port_No(port));
+
+ if (!baud_table[baud]) {
+ /* Drop DTR & exit */
+ bp->DTR |= (1u << port_No(port));
+ rc_out(bp, RC_DTR, bp->DTR);
+ return;
+ } else {
+ /* Set DTR on */
+ bp->DTR &= ~(1u << port_No(port));
+ rc_out(bp, RC_DTR, bp->DTR);
+ }
+
+ /*
+ * Now we must calculate some speed depended things
+ */
+
+ /* Set baud rate for port */
+ tmp = (((RC_OSCFREQ + baud_table[baud]/2) / baud_table[baud] +
+ CD180_TPC/2) / CD180_TPC);
+
+ rc_out(bp, CD180_RBPRH, (tmp >> 8) & 0xff);
+ rc_out(bp, CD180_TBPRH, (tmp >> 8) & 0xff);
+ rc_out(bp, CD180_RBPRL, tmp & 0xff);
+ rc_out(bp, CD180_TBPRL, tmp & 0xff);
+
+ baud = (baud_table[baud] + 5) / 10; /* Estimated CPS */
+
+ /* Two timer ticks seems enough to wakeup something like SLIP driver */
+ tmp = ((baud + HZ/2) / HZ) * 2 - CD180_NFIFO;
+ port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ?
+ SERIAL_XMIT_SIZE - 1 : tmp);
+
+ /* Receiver timeout will be transmission time for 1.5 chars */
+ tmp = (RISCOM_TPS + RISCOM_TPS/2 + baud/2) / baud;
+ tmp = (tmp > 0xff) ? 0xff : tmp;
+ rc_out(bp, CD180_RTPR, tmp);
+
+ switch (C_CSIZE(tty)) {
+ case CS5:
+ cor1 |= COR1_5BITS;
+ break;
+ case CS6:
+ cor1 |= COR1_6BITS;
+ break;
+ case CS7:
+ cor1 |= COR1_7BITS;
+ break;
+ case CS8:
+ cor1 |= COR1_8BITS;
+ break;
+ }
+
+ if (C_CSTOPB(tty))
+ cor1 |= COR1_2SB;
+
+ cor1 |= COR1_IGNORE;
+ if (C_PARENB(tty)) {
+ cor1 |= COR1_NORMPAR;
+ if (C_PARODD(tty))
+ cor1 |= COR1_ODDP;
+ if (I_INPCK(tty))
+ cor1 &= ~COR1_IGNORE;
+ }
+ /* Set marking of some errors */
+ port->mark_mask = RCSR_OE | RCSR_TOUT;
+ if (I_INPCK(tty))
+ port->mark_mask |= RCSR_FE | RCSR_PE;
+ if (I_BRKINT(tty) || I_PARMRK(tty))
+ port->mark_mask |= RCSR_BREAK;
+ if (I_IGNPAR(tty))
+ port->mark_mask &= ~(RCSR_FE | RCSR_PE);
+ if (I_IGNBRK(tty)) {
+ port->mark_mask &= ~RCSR_BREAK;
+ if (I_IGNPAR(tty))
+ /* Real raw mode. Ignore all */
+ port->mark_mask &= ~RCSR_OE;
+ }
+ /* Enable Hardware FLow Control */
+ if (C_CRTSCTS(tty)) {
+#ifdef RISCOM_BRAIN_DAMAGED_CTS
+ port->IER |= IER_DSR | IER_CTS;
+ mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD;
+ mcor2 |= MCOR2_DSROD | MCOR2_CTSOD;
+ tty->hw_stopped = !(rc_in(bp, CD180_MSVR) & (MSVR_CTS|MSVR_DSR));
+#else
+ port->COR2 |= COR2_CTSAE;
+#endif
+ }
+ /* Enable Software Flow Control. FIXME: I'm not sure about this */
+ /* Some people reported that it works, but I still doubt */
+ if (I_IXON(tty)) {
+ port->COR2 |= COR2_TXIBE;
+ cor3 |= (COR3_FCT | COR3_SCDE);
+ if (I_IXANY(tty))
+ port->COR2 |= COR2_IXM;
+ rc_out(bp, CD180_SCHR1, START_CHAR(tty));
+ rc_out(bp, CD180_SCHR2, STOP_CHAR(tty));
+ rc_out(bp, CD180_SCHR3, START_CHAR(tty));
+ rc_out(bp, CD180_SCHR4, STOP_CHAR(tty));
+ }
+ if (!C_CLOCAL(tty)) {
+ /* Enable CD check */
+ port->IER |= IER_CD;
+ mcor1 |= MCOR1_CDZD;
+ mcor2 |= MCOR2_CDOD;
+ }
+
+ if (C_CREAD(tty))
+ /* Enable receiver */
+ port->IER |= IER_RXD;
+
+ /* Set input FIFO size (1-8 bytes) */
+ cor3 |= RISCOM_RXFIFO;
+ /* Setting up CD180 channel registers */
+ rc_out(bp, CD180_COR1, cor1);
+ rc_out(bp, CD180_COR2, port->COR2);
+ rc_out(bp, CD180_COR3, cor3);
+ /* Make CD180 know about registers change */
+ rc_wait_CCR(bp);
+ rc_out(bp, CD180_CCR, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3);
+ /* Setting up modem option registers */
+ rc_out(bp, CD180_MCOR1, mcor1);
+ rc_out(bp, CD180_MCOR2, mcor2);
+ /* Enable CD180 trasmitter & receiver */
+ rc_wait_CCR(bp);
+ rc_out(bp, CD180_CCR, CCR_TXEN | CCR_RXEN);
+ /* Enable interrupts */
+ rc_out(bp, CD180_IER, port->IER);
+ /* And finaly set RTS on */
+ rc_out(bp, CD180_MSVR, port->MSVR);
+}
+
+/* Must be called with interrupts enabled */
+static int rc_setup_port(struct riscom_board *bp, struct riscom_port *port)
+{
+ unsigned long flags;
+
+ if (port->flags & ASYNC_INITIALIZED)
+ return 0;
+
+ if (!port->xmit_buf) {
+ /* We may sleep in get_free_page() */
+ unsigned long tmp;
+
+ if (!(tmp = get_free_page(GFP_KERNEL)))
+ return -ENOMEM;
+
+ if (port->xmit_buf) {
+ free_page(tmp);
+ return -ERESTARTSYS;
+ }
+ port->xmit_buf = (unsigned char *) tmp;
+ }
+
+ save_flags(flags); cli();
+
+ if (port->tty)
+ clear_bit(TTY_IO_ERROR, &port->tty->flags);
+
+ if (port->count == 1)
+ bp->count++;
+
+ port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
+ rc_change_speed(bp, port);
+ port->flags |= ASYNC_INITIALIZED;
+
+ restore_flags(flags);
+ return 0;
+}
+
+/* Must be called with interrupts disabled */
+static void rc_shutdown_port(struct riscom_board *bp, struct riscom_port *port)
+{
+ struct tty_struct *tty;
+
+ if (!(port->flags & ASYNC_INITIALIZED))
+ return;
+
+#ifdef RC_REPORT_OVERRUN
+ printk("rc%d: port %d: Total %ld overruns were detected.\n",
+ board_No(bp), port_No(port), port->overrun);
+#endif
+#ifdef RC_REPORT_FIFO
+ {
+ int i;
+
+ printk("rc%d: port %d: FIFO hits [ ",
+ board_No(bp), port_No(port));
+ for (i = 0; i < 10; i++) {
+ printk("%ld ", port->hits[i]);
+ }
+ printk("].\n");
+ }
+#endif
+ if (port->xmit_buf) {
+ free_page((unsigned long) port->xmit_buf);
+ port->xmit_buf = NULL;
+ }
+
+ if (!(tty = port->tty) || C_HUPCL(tty)) {
+ /* Drop DTR */
+ bp->DTR |= (1u << port_No(port));
+ rc_out(bp, RC_DTR, bp->DTR);
+ }
+
+ /* Select port */
+ rc_out(bp, CD180_CAR, port_No(port));
+ /* Reset port */
+ rc_wait_CCR(bp);
+ rc_out(bp, CD180_CCR, CCR_SOFTRESET);
+ /* Disable all interrupts from this port */
+ port->IER = 0;
+ rc_out(bp, CD180_IER, port->IER);
+
+ if (tty)
+ set_bit(TTY_IO_ERROR, &tty->flags);
+ port->flags &= ~ASYNC_INITIALIZED;
+
+ if (--bp->count < 0) {
+ printk("rc%d: rc_shutdow_port: bad board count: %d\n",
+ board_No(bp), bp->count);
+ bp->count = 0;
+ }
+
+ /*
+ * If this is the last opened port on the board
+ * shutdown whole board
+ */
+ if (!bp->count)
+ rc_shutdown_board(bp);
+}
+
+
+static int block_til_ready(struct tty_struct *tty, struct file * filp,
+ struct riscom_port *port)
+{
+ struct wait_queue wait = { current, NULL };
+ struct riscom_board *bp = port_Board(port);
+ int retval;
+ int do_clocal = 0;
+ int CD;
+
+ /*
+ * 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) || port->flags & ASYNC_CLOSING) {
+ interruptible_sleep_on(&port->close_wait);
+ if (port->flags & ASYNC_HUP_NOTIFY)
+ return -EAGAIN;
+ else
+ return -ERESTARTSYS;
+ }
+
+ /*
+ * If this is a callout device, then just make sure the normal
+ * device isn't being used.
+ */
+ if (tty->driver.subtype == RISCOM_TYPE_CALLOUT) {
+ if (port->flags & ASYNC_NORMAL_ACTIVE)
+ return -EBUSY;
+ if ((port->flags & ASYNC_CALLOUT_ACTIVE) &&
+ (port->flags & ASYNC_SESSION_LOCKOUT) &&
+ (port->session != current->session))
+ return -EBUSY;
+ if ((port->flags & ASYNC_CALLOUT_ACTIVE) &&
+ (port->flags & ASYNC_PGRP_LOCKOUT) &&
+ (port->pgrp != current->pgrp))
+ return -EBUSY;
+ port->flags |= ASYNC_CALLOUT_ACTIVE;
+ return 0;
+ }
+
+ /*
+ * If non-blocking mode is set, or the port is not enabled,
+ * then make the check up front and then exit.
+ */
+ if ((filp->f_flags & O_NONBLOCK) ||
+ (tty->flags & (1 << TTY_IO_ERROR))) {
+ if (port->flags & ASYNC_CALLOUT_ACTIVE)
+ return -EBUSY;
+ port->flags |= ASYNC_NORMAL_ACTIVE;
+ return 0;
+ }
+
+ if (port->flags & ASYNC_CALLOUT_ACTIVE) {
+ if (port->normal_termios.c_cflag & CLOCAL)
+ do_clocal = 1;
+ } else {
+ if (C_CLOCAL(tty))
+ do_clocal = 1;
+ }
+
+ /*
+ * Block waiting for the carrier detect and the line to become
+ * free (i.e., not in use by the callout). While we are in
+ * this loop, info->count is dropped by one, so that
+ * rs_close() knows when to free things. We restore it upon
+ * exit, either normal or abnormal.
+ */
+ retval = 0;
+ add_wait_queue(&port->open_wait, &wait);
+ cli();
+ if (!tty_hung_up_p(filp))
+ port->count--;
+ sti();
+ port->blocked_open++;
+ while (1) {
+ cli();
+ rc_out(bp, CD180_CAR, port_No(port));
+ CD = rc_in(bp, CD180_MSVR) & MSVR_CD;
+ if (!(port->flags & ASYNC_CALLOUT_ACTIVE)) {
+ rc_out(bp, CD180_MSVR, MSVR_RTS);
+ bp->DTR &= ~(1u << port_No(port));
+ rc_out(bp, RC_DTR, bp->DTR);
+ }
+ sti();
+ current->state = TASK_INTERRUPTIBLE;
+ if (tty_hung_up_p(filp) ||
+ !(port->flags & ASYNC_INITIALIZED)) {
+ if (port->flags & ASYNC_HUP_NOTIFY)
+ retval = -EAGAIN;
+ else
+ retval = -ERESTARTSYS;
+ break;
+ }
+ if (!(port->flags & ASYNC_CALLOUT_ACTIVE) &&
+ !(port->flags & ASYNC_CLOSING) &&
+ (do_clocal || CD))
+ break;
+ if (current->signal & ~current->blocked) {
+ retval = -ERESTARTSYS;
+ break;
+ }
+ schedule();
+ }
+ current->state = TASK_RUNNING;
+ remove_wait_queue(&port->open_wait, &wait);
+ if (!tty_hung_up_p(filp))
+ port->count++;
+ port->blocked_open--;
+ if (retval)
+ return retval;
+
+ port->flags |= ASYNC_NORMAL_ACTIVE;
+ return 0;
+}
+
+static int rc_open(struct tty_struct * tty, struct file * filp)
+{
+ int board;
+ int error;
+ struct riscom_port * port;
+ struct riscom_board * bp;
+ unsigned long flags;
+
+ board = RC_BOARD(MINOR(tty->device));
+ if (board > RC_NBOARD || !(rc_board[board].flags & RC_BOARD_PRESENT))
+ return -ENODEV;
+
+ bp = &rc_board[board];
+ port = rc_port + board * RC_NPORT + RC_PORT(MINOR(tty->device));
+ if (rc_paranoia_check(port, tty->device, "rc_open"))
+ return -ENODEV;
+
+ if ((error = rc_setup_board(bp)))
+ return error;
+
+ port->count++;
+ tty->driver_data = port;
+ port->tty = tty;
+
+ if ((error = rc_setup_port(bp, port)))
+ return error;
+
+ if ((error = block_til_ready(tty, filp, port)))
+ return error;
+
+ if ((port->count == 1) && (port->flags & ASYNC_SPLIT_TERMIOS)) {
+ if (tty->driver.subtype == RISCOM_TYPE_NORMAL)
+ *tty->termios = port->normal_termios;
+ else
+ *tty->termios = port->callout_termios;
+ save_flags(flags); cli();
+ rc_change_speed(bp, port);
+ restore_flags(flags);
+ }
+
+ port->session = current->session;
+ port->pgrp = current->pgrp;
+
+ return 0;
+}
+
+static void rc_close(struct tty_struct * tty, struct file * filp)
+{
+ struct riscom_port *port = (struct riscom_port *) tty->driver_data;
+ struct riscom_board *bp;
+ unsigned long flags;
+ unsigned long timeout;
+
+ if (!port || rc_paranoia_check(port, tty->device, "close"))
+ return;
+
+ save_flags(flags); cli();
+ if (tty_hung_up_p(filp)) {
+ restore_flags(flags);
+ return;
+ }
+
+ bp = port_Board(port);
+ if ((tty->count == 1) && (port->count != 1)) {
+ printk("rc%d: rc_close: bad port count;"
+ " tty->count is 1, port count is %d\n",
+ board_No(bp), port->count);
+ port->count = 1;
+ }
+ if (--port->count < 0) {
+ printk("rc%d: rc_close: bad port count for tty%d: %d\n",
+ board_No(bp), port_No(port), port->count);
+ port->count = 0;
+ }
+ if (port->count) {
+ restore_flags(flags);
+ return;
+ }
+ port->flags |= ASYNC_CLOSING;
+ /*
+ * Save the termios structure, since this port may have
+ * separate termios for callout and dialin.
+ */
+ if (port->flags & ASYNC_NORMAL_ACTIVE)
+ port->normal_termios = *tty->termios;
+ if (port->flags & ASYNC_CALLOUT_ACTIVE)
+ port->callout_termios = *tty->termios;
+ /*
+ * Now we wait for the transmit buffer to clear; and we notify
+ * the line discipline to only process XON/XOFF characters.
+ */
+ tty->closing = 1;
+ if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE)
+ tty_wait_until_sent(tty, port->closing_wait);
+ /*
+ * At this point we stop accepting input. To do this, we
+ * disable the receive line status interrupts, and tell the
+ * interrupt driver to stop checking the data ready bit in the
+ * line status register.
+ */
+ port->IER &= ~IER_RXD;
+ if (port->flags & ASYNC_INITIALIZED) {
+ port->IER &= ~IER_TXRDY;
+ port->IER |= IER_TXEMPTY;
+ rc_out(bp, CD180_CAR, port_No(port));
+ rc_out(bp, CD180_IER, port->IER);
+ /*
+ * Before we drop DTR, make sure the UART transmitter
+ * has completely drained; this is especially
+ * important if there is a transmit FIFO!
+ */
+ timeout = jiffies+HZ;
+ while(port->IER & IER_TXEMPTY) {
+ current->state = TASK_INTERRUPTIBLE;
+ current->timeout = jiffies + port->timeout;
+ schedule();
+ if (jiffies > timeout)
+ break;
+ }
+ }
+ rc_shutdown_port(bp, port);
+ if (tty->driver.flush_buffer)
+ tty->driver.flush_buffer(tty);
+ if (tty->ldisc.flush_buffer)
+ tty->ldisc.flush_buffer(tty);
+ tty->closing = 0;
+ port->event = 0;
+ port->tty = 0;
+ if (port->blocked_open) {
+ if (port->close_delay) {
+ current->state = TASK_INTERRUPTIBLE;
+ current->timeout = jiffies + port->close_delay;
+ schedule();
+ }
+ wake_up_interruptible(&port->open_wait);
+ }
+ port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE|
+ ASYNC_CLOSING);
+ wake_up_interruptible(&port->close_wait);
+ restore_flags(flags);
+}
+
+static int rc_write(struct tty_struct * tty, int from_user,
+ const unsigned char *buf, int count)
+{
+ struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ struct riscom_board *bp;
+ int c, total = 0;
+ unsigned long flags;
+
+ if (rc_paranoia_check(port, tty->device, "rc_write"))
+ return 0;
+
+ bp = port_Board(port);
+
+ if (!tty || !port->xmit_buf || !tmp_buf)
+ return 0;
+
+ if (from_user)
+ down(&tmp_buf_sem);
+
+ save_flags(flags);
+ while (1) {
+ cli();
+ c = MIN(count, MIN(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
+ SERIAL_XMIT_SIZE - port->xmit_head));
+ if (c <= 0)
+ break;
+
+ if (from_user) {
+ memcpy_fromfs(tmp_buf, buf, c);
+ c = MIN(c, MIN(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
+ SERIAL_XMIT_SIZE - port->xmit_head));
+ memcpy(port->xmit_buf + port->xmit_head, tmp_buf, c);
+ } else
+ memcpy(port->xmit_buf + port->xmit_head, buf, c);
+ port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1);
+ port->xmit_cnt += c;
+ restore_flags(flags);
+ buf += c;
+ count -= c;
+ total += c;
+ }
+ if (from_user)
+ up(&tmp_buf_sem);
+ if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped &&
+ !(port->IER & IER_TXRDY)) {
+ port->IER |= IER_TXRDY;
+ rc_out(bp, CD180_CAR, port_No(port));
+ rc_out(bp, CD180_IER, port->IER);
+ }
+ restore_flags(flags);
+ return total;
+}
+
+static void rc_put_char(struct tty_struct * tty, unsigned char ch)
+{
+ struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ unsigned long flags;
+
+ if (rc_paranoia_check(port, tty->device, "rc_put_char"))
+ return;
+
+ if (!tty || !port->xmit_buf)
+ return;
+
+ save_flags(flags); cli();
+
+ if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
+ restore_flags(flags);
+ return;
+ }
+
+ port->xmit_buf[port->xmit_head++] = ch;
+ port->xmit_head &= SERIAL_XMIT_SIZE - 1;
+ port->xmit_cnt++;
+ restore_flags(flags);
+}
+
+static void rc_flush_chars(struct tty_struct * tty)
+{
+ struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ unsigned long flags;
+
+ if (rc_paranoia_check(port, tty->device, "rc_flush_chars"))
+ return;
+
+ if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
+ !port->xmit_buf)
+ return;
+
+ save_flags(flags); cli();
+ port->IER |= IER_TXRDY;
+ rc_out(port_Board(port), CD180_CAR, port_No(port));
+ rc_out(port_Board(port), CD180_IER, port->IER);
+ restore_flags(flags);
+}
+
+static int rc_write_room(struct tty_struct * tty)
+{
+ struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ int ret;
+
+ if (rc_paranoia_check(port, tty->device, "rc_write_room"))
+ return 0;
+
+ ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
+ if (ret < 0)
+ ret = 0;
+ return ret;
+}
+
+static int rc_chars_in_buffer(struct tty_struct *tty)
+{
+ struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+
+ if (rc_paranoia_check(port, tty->device, "rc_chars_in_buffer"))
+ return 0;
+
+ return port->xmit_cnt;
+}
+
+static void rc_flush_buffer(struct tty_struct *tty)
+{
+ struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ unsigned long flags;
+
+ if (rc_paranoia_check(port, tty->device, "rc_flush_buffer"))
+ return;
+
+ save_flags(flags); cli();
+ port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
+ restore_flags(flags);
+
+ wake_up_interruptible(&tty->write_wait);
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
+ tty->ldisc.write_wakeup)
+ (tty->ldisc.write_wakeup)(tty);
+}
+
+static int rc_get_modem_info(struct riscom_port * port, unsigned int *value)
+{
+ struct riscom_board * bp;
+ unsigned char status;
+ unsigned int result;
+ unsigned long flags;
+
+ bp = port_Board(port);
+ save_flags(flags); cli();
+ rc_out(bp, CD180_CAR, port_No(port));
+ status = rc_in(bp, CD180_MSVR);
+ result = rc_in(bp, RC_RI) & (1u << port_No(port)) ? 0 : TIOCM_RNG;
+ restore_flags(flags);
+ result |= ((status & MSVR_RTS) ? TIOCM_RTS : 0)
+ | ((status & MSVR_DTR) ? TIOCM_DTR : 0)
+ | ((status & MSVR_CD) ? TIOCM_CAR : 0)
+ | ((status & MSVR_DSR) ? TIOCM_DSR : 0)
+ | ((status & MSVR_CTS) ? TIOCM_CTS : 0);
+ put_user(result,(unsigned long *) value);
+ return 0;
+}
+
+static int rc_set_modem_info(struct riscom_port * port, unsigned int cmd,
+ unsigned int *value)
+{
+ int error;
+ unsigned int arg;
+ unsigned long flags;
+ struct riscom_board *bp = port_Board(port);
+
+ error = verify_area(VERIFY_READ, value, sizeof(int));
+ if (error)
+ return error;
+ arg = get_fs_long((unsigned long *) value);
+ switch (cmd) {
+ case TIOCMBIS:
+ if (arg & TIOCM_RTS)
+ port->MSVR |= MSVR_RTS;
+ if (arg & TIOCM_DTR)
+ bp->DTR &= ~(1u << port_No(port));
+ break;
+ case TIOCMBIC:
+ if (arg & TIOCM_RTS)
+ port->MSVR &= ~MSVR_RTS;
+ if (arg & TIOCM_DTR)
+ bp->DTR |= (1u << port_No(port));
+ break;
+ case TIOCMSET:
+ port->MSVR = (arg & TIOCM_RTS) ? (port->MSVR | MSVR_RTS) :
+ (port->MSVR & ~MSVR_RTS);
+ bp->DTR = arg & TIOCM_DTR ? (bp->DTR &= ~(1u << port_No(port))) :
+ (bp->DTR |= (1u << port_No(port)));
+ break;
+ default:
+ return -EINVAL;
+ }
+ save_flags(flags); cli();
+ rc_out(bp, CD180_CAR, port_No(port));
+ rc_out(bp, CD180_MSVR, port->MSVR);
+ rc_out(bp, RC_DTR, bp->DTR);
+ restore_flags(flags);
+ return 0;
+}
+
+extern inline void rc_send_break(struct riscom_port * port, unsigned long length)
+{
+ struct riscom_board *bp = port_Board(port);
+ unsigned long flags;
+
+ save_flags(flags); cli();
+ port->break_length = RISCOM_TPS / HZ * length;
+ port->COR2 |= COR2_ETC;
+ port->IER |= IER_TXRDY;
+ rc_out(bp, CD180_CAR, port_No(port));
+ rc_out(bp, CD180_COR2, port->COR2);
+ rc_out(bp, CD180_IER, port->IER);
+ rc_wait_CCR(bp);
+ rc_out(bp, CD180_CCR, CCR_CORCHG2);
+ rc_wait_CCR(bp);
+ restore_flags(flags);
+}
+
+extern inline int rc_set_serial_info(struct riscom_port * port,
+ struct serial_struct * newinfo)
+{
+ struct serial_struct tmp;
+ struct riscom_board *bp = port_Board(port);
+ int change_speed;
+ unsigned long flags;
+ int error;
+
+ error = verify_area(VERIFY_READ, (void *) newinfo, sizeof(tmp));
+ if (error)
+ return error;
+ memcpy_fromfs(&tmp, newinfo, sizeof(tmp));
+
+#if 0
+ if ((tmp.irq != bp->irq) ||
+ (tmp.port != bp->base) ||
+ (tmp.type != PORT_CIRRUS) ||
+ (tmp.baud_base != (RC_OSCFREQ + CD180_TPC/2) / CD180_TPC) ||
+ (tmp.custom_divisor != 0) ||
+ (tmp.xmit_fifo_size != CD180_NFIFO) ||
+ (tmp.flags & ~RISCOM_LEGAL_FLAGS))
+ return -EINVAL;
+#endif
+
+ change_speed = ((port->flags & ASYNC_SPD_MASK) !=
+ (tmp.flags & ASYNC_SPD_MASK));
+
+ if (!suser()) {
+ if ((tmp.close_delay != port->close_delay) ||
+ (tmp.closing_wait != port->closing_wait) ||
+ ((tmp.flags & ~ASYNC_USR_MASK) !=
+ (port->flags & ~ASYNC_USR_MASK)))
+ return -EPERM;
+ port->flags = ((port->flags & ~ASYNC_USR_MASK) |
+ (tmp.flags & ASYNC_USR_MASK));
+ } else {
+ port->flags = ((port->flags & ~ASYNC_FLAGS) |
+ (tmp.flags & ASYNC_FLAGS));
+ port->close_delay = tmp.close_delay;
+ port->closing_wait = tmp.closing_wait;
+ }
+ if (change_speed) {
+ save_flags(flags); cli();
+ rc_change_speed(bp, port);
+ restore_flags(flags);
+ }
+ return 0;
+}
+
+extern inline int rc_get_serial_info(struct riscom_port * port,
+ struct serial_struct * retinfo)
+{
+ struct serial_struct tmp;
+ struct riscom_board *bp = port_Board(port);
+ int error;
+
+ error = verify_area(VERIFY_WRITE, (void *) retinfo, sizeof(tmp));
+ if (error)
+ return error;
+
+ memset(&tmp, 0, sizeof(tmp));
+ tmp.type = PORT_CIRRUS;
+ tmp.line = port - rc_port;
+ tmp.port = bp->base;
+ tmp.irq = bp->irq;
+ tmp.flags = port->flags;
+ tmp.baud_base = (RC_OSCFREQ + CD180_TPC/2) / CD180_TPC;
+ tmp.close_delay = port->close_delay * HZ/100;
+ tmp.closing_wait = port->closing_wait * HZ/100;
+ tmp.xmit_fifo_size = CD180_NFIFO;
+ memcpy_tofs(retinfo, &tmp, sizeof(tmp));
+ return 0;
+}
+
+static int rc_ioctl(struct tty_struct * tty, struct file * filp,
+ unsigned int cmd, unsigned long arg)
+
+{
+ struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ int error;
+ int retval;
+
+ if (rc_paranoia_check(port, tty->device, "rc_ioctl"))
+ return -ENODEV;
+
+ switch (cmd) {
+ case TCSBRK: /* SVID version: non-zero arg --> no break */
+ retval = tty_check_change(tty);
+ if (retval)
+ return retval;
+ tty_wait_until_sent(tty, 0);
+ if (!arg)
+ rc_send_break(port, HZ/4); /* 1/4 second */
+ return 0;
+ case TCSBRKP: /* support for POSIX tcsendbreak() */
+ retval = tty_check_change(tty);
+ if (retval)
+ return retval;
+ tty_wait_until_sent(tty, 0);
+ rc_send_break(port, arg ? arg*(HZ/10) : HZ/4);
+ return 0;
+ case TIOCGSOFTCAR:
+ error = verify_area(VERIFY_WRITE, (void *) arg, sizeof(long));
+ if (error)
+ return error;
+ put_user(C_CLOCAL(tty) ? 1 : 0,
+ (unsigned long *) arg);
+ return 0;
+ case TIOCSSOFTCAR:
+ arg = get_user((unsigned long *) arg);
+ tty->termios->c_cflag =
+ ((tty->termios->c_cflag & ~CLOCAL) |
+ (arg ? CLOCAL : 0));
+ return 0;
+ case TIOCMGET:
+ error = verify_area(VERIFY_WRITE, (void *) arg,
+ sizeof(unsigned int));
+ if (error)
+ return error;
+ return rc_get_modem_info(port, (unsigned int *) arg);
+ case TIOCMBIS:
+ case TIOCMBIC:
+ case TIOCMSET:
+ return rc_set_modem_info(port, cmd, (unsigned int *) arg);
+ case TIOCGSERIAL:
+ return rc_get_serial_info(port, (struct serial_struct *) arg);
+ case TIOCSSERIAL:
+ return rc_set_serial_info(port, (struct serial_struct *) arg);
+ default:
+ return -ENOIOCTLCMD;
+ }
+ return 0;
+}
+
+static void rc_throttle(struct tty_struct * tty)
+{
+ struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ struct riscom_board *bp;
+ unsigned long flags;
+
+ if (rc_paranoia_check(port, tty->device, "rc_throttle"))
+ return;
+
+ bp = port_Board(port);
+
+ save_flags(flags); cli();
+ port->MSVR &= ~MSVR_RTS;
+ rc_out(bp, CD180_CAR, port_No(port));
+ if (I_IXOFF(tty)) {
+ rc_wait_CCR(bp);
+ rc_out(bp, CD180_CCR, CCR_SSCH2);
+ rc_wait_CCR(bp);
+ }
+ rc_out(bp, CD180_MSVR, port->MSVR);
+ restore_flags(flags);
+}
+
+static void rc_unthrottle(struct tty_struct * tty)
+{
+ struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ struct riscom_board *bp;
+ unsigned long flags;
+
+ if (rc_paranoia_check(port, tty->device, "rc_unthrottle"))
+ return;
+
+ bp = port_Board(port);
+
+ save_flags(flags); cli();
+ port->MSVR |= MSVR_RTS;
+ rc_out(bp, CD180_CAR, port_No(port));
+ if (I_IXOFF(tty)) {
+ rc_wait_CCR(bp);
+ rc_out(bp, CD180_CCR, CCR_SSCH1);
+ rc_wait_CCR(bp);
+ }
+ rc_out(bp, CD180_MSVR, port->MSVR);
+ restore_flags(flags);
+}
+
+static void rc_stop(struct tty_struct * tty)
+{
+ struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ struct riscom_board *bp;
+ unsigned long flags;
+
+ if (rc_paranoia_check(port, tty->device, "rc_stop"))
+ return;
+
+ bp = port_Board(port);
+
+ save_flags(flags); cli();
+ port->IER &= ~IER_TXRDY;
+ rc_out(bp, CD180_CAR, port_No(port));
+ rc_out(bp, CD180_IER, port->IER);
+ restore_flags(flags);
+}
+
+static void rc_start(struct tty_struct * tty)
+{
+ struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ struct riscom_board *bp;
+ unsigned long flags;
+
+ if (rc_paranoia_check(port, tty->device, "rc_start"))
+ return;
+
+ bp = port_Board(port);
+
+ save_flags(flags); cli();
+ if (port->xmit_cnt && port->xmit_buf && !(port->IER & IER_TXRDY)) {
+ port->IER |= IER_TXRDY;
+ rc_out(bp, CD180_CAR, port_No(port));
+ rc_out(bp, CD180_IER, port->IER);
+ }
+ restore_flags(flags);
+}
+
+/*
+ * This routine is called from the scheduler tqueue when the interrupt
+ * routine has signalled that a hangup has occurred. The path of
+ * hangup processing is:
+ *
+ * serial interrupt routine -> (scheduler tqueue) ->
+ * do_rc_hangup() -> tty->hangup() -> rc_hangup()
+ *
+ */
+static void do_rc_hangup(void *private_)
+{
+ struct riscom_port *port = (struct riscom_port *) private_;
+ struct tty_struct *tty;
+
+ tty = port->tty;
+ if (!tty)
+ return;
+
+ tty_hangup(tty);
+}
+
+static void rc_hangup(struct tty_struct * tty)
+{
+ struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ struct riscom_board *bp;
+
+ if (rc_paranoia_check(port, tty->device, "rc_hangup"))
+ return;
+
+ bp = port_Board(port);
+
+ rc_shutdown_port(bp, port);
+ port->event = 0;
+ port->count = 0;
+ port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE);
+ port->tty = 0;
+ wake_up_interruptible(&port->open_wait);
+}
+
+static void rc_set_termios(struct tty_struct * tty, struct termios * old_termios)
+{
+ struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ unsigned long flags;
+
+ if (rc_paranoia_check(port, tty->device, "rc_set_termios"))
+ return;
+
+ if (tty->termios->c_cflag == old_termios->c_cflag &&
+ tty->termios->c_iflag == old_termios->c_iflag)
+ return;
+
+ save_flags(flags); cli();
+ rc_change_speed(port_Board(port), port);
+ restore_flags(flags);
+
+ if ((old_termios->c_cflag & CRTSCTS) &&
+ !(tty->termios->c_cflag & CRTSCTS)) {
+ tty->hw_stopped = 0;
+ rc_start(tty);
+ }
+}
+
+static void do_riscom_bh(void)
+{
+ run_task_queue(&tq_riscom);
+}
+
+static void do_softint(void *private_)
+{
+ struct riscom_port *port = (struct riscom_port *) private_;
+ struct tty_struct *tty;
+
+ if(!(tty = port->tty))
+ return;
+
+ if (clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event)) {
+ if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
+ tty->ldisc.write_wakeup)
+ (tty->ldisc.write_wakeup)(tty);
+ wake_up_interruptible(&tty->write_wait);
+ }
+}
+
+static int rc_init_drivers(void)
+{
+ int error;
+ int i;
+
+
+ if (!(tmp_buf = (unsigned char *) get_free_page(GFP_KERNEL))) {
+ printk("rc: Couldn't get free page.\n");
+ return 1;
+ }
+ init_bh(RISCOM8_BH, do_riscom_bh);
+ memset(IRQ_to_board, 0, sizeof(IRQ_to_board));
+ memset(&riscom_driver, 0, sizeof(riscom_driver));
+ riscom_driver.magic = TTY_DRIVER_MAGIC;
+ riscom_driver.name = "ttyL";
+ riscom_driver.major = RISCOM8_NORMAL_MAJOR;
+ riscom_driver.num = RC_NBOARD * RC_NPORT;
+ riscom_driver.type = TTY_DRIVER_TYPE_SERIAL;
+ riscom_driver.subtype = RISCOM_TYPE_NORMAL;
+ riscom_driver.init_termios = tty_std_termios;
+ riscom_driver.init_termios.c_cflag =
+ B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ riscom_driver.flags = TTY_DRIVER_REAL_RAW;
+ riscom_driver.refcount = &riscom_refcount;
+ riscom_driver.table = riscom_table;
+ riscom_driver.termios = riscom_termios;
+ riscom_driver.termios_locked = riscom_termios_locked;
+
+ riscom_driver.open = rc_open;
+ riscom_driver.close = rc_close;
+ riscom_driver.write = rc_write;
+ riscom_driver.put_char = rc_put_char;
+ riscom_driver.flush_chars = rc_flush_chars;
+ riscom_driver.write_room = rc_write_room;
+ riscom_driver.chars_in_buffer = rc_chars_in_buffer;
+ riscom_driver.flush_buffer = rc_flush_buffer;
+ riscom_driver.ioctl = rc_ioctl;
+ riscom_driver.throttle = rc_throttle;
+ riscom_driver.unthrottle = rc_unthrottle;
+ riscom_driver.set_termios = rc_set_termios;
+ riscom_driver.stop = rc_stop;
+ riscom_driver.start = rc_start;
+ riscom_driver.hangup = rc_hangup;
+
+ riscom_callout_driver = riscom_driver;
+ riscom_callout_driver.name = "cul";
+ riscom_callout_driver.major = RISCOM8_CALLOUT_MAJOR;
+ riscom_callout_driver.subtype = RISCOM_TYPE_CALLOUT;
+
+ if ((error = tty_register_driver(&riscom_driver))) {
+ free_page((unsigned long)tmp_buf);
+ printk("rc: Couldn't register RISCom/8 driver, error = %d\n",
+ error);
+ return 1;
+ }
+ if ((error = tty_register_driver(&riscom_callout_driver))) {
+ free_page((unsigned long)tmp_buf);
+ tty_unregister_driver(&riscom_driver);
+ printk("rc: Couldn't register RISCom/8 callout driver, error = %d\n",
+ error);
+ return 1;
+ }
+
+ memset(rc_port, 0, sizeof(rc_port));
+ for (i = 0; i < RC_NPORT * RC_NBOARD; i++) {
+ rc_port[i].callout_termios = riscom_callout_driver.init_termios;
+ rc_port[i].normal_termios = riscom_driver.init_termios;
+ rc_port[i].magic = RISCOM8_MAGIC;
+ rc_port[i].tqueue.routine = do_softint;
+ rc_port[i].tqueue.data = &rc_port[i];
+ rc_port[i].tqueue_hangup.routine = do_rc_hangup;
+ rc_port[i].tqueue_hangup.data = &rc_port[i];
+ rc_port[i].close_delay = 50 * HZ/100;
+ rc_port[i].closing_wait = 3000 * HZ/100;
+ }
+
+ return 0;
+}
+
+static void rc_release_drivers(void)
+{
+ free_page((unsigned long)tmp_buf);
+ tty_unregister_driver(&riscom_driver);
+ tty_unregister_driver(&riscom_callout_driver);
+}
+
+#ifndef MODULE
+/*
+ * Called at boot time.
+ *
+ * You can specify IO base for up to RC_NBOARD cards,
+ * using line "riscom8=0xiobase1,0xiobase2,.." at LILO prompt.
+ * Note that there wiil be no probing at default
+ * addresses in this case.
+ *
+ */
+void riscom8_setup(char *str, int * ints)
+{
+ int i;
+
+ for (i = 0; i < RC_NBOARD; i++) {
+ if (i < ints[0])
+ rc_board[i].base = ints[i+1];
+ else
+ rc_board[i].base = 0;
+ }
+}
+#endif
+
+/*
+ * This routine must be called by kernel at boot time
+ */
+int riscom8_init(void)
+{
+ int i;
+ int found = 0;
+
+ printk("rc: SDL RISCom/8 card driver v1.0, (c) D.Gorodchanin 1994-1996.\n");
+
+ if (rc_init_drivers())
+ return -EIO;
+
+ for (i = 0; i < RC_NBOARD; i++)
+ if (rc_board[i].base && !rc_probe(&rc_board[i]))
+ found++;
+
+ if (!found) {
+ rc_release_drivers();
+ printk("rc: No RISCom/8 boards detected.\n");
+ return -EIO;
+ }
+ return 0;
+}
+
+#ifdef MODULE
+int iobase = 0;
+int iobase1 = 0;
+int iobase2 = 0;
+int iobase3 = 0;
+
+/*
+ * You can setup up to 4 boards (current value of RC_NBOARD)
+ * by specifying "iobase=0xXXX iobase1=0xXXX ..." as isnmod parametr.
+ *
+ */
+int init_module(void)
+{
+ int i;
+
+ if (iobase || iobase1 || iobase2 || iobase3) {
+ for(i = 0; i < RC_NBOARD; i++)
+ rc_board[0].base = 0;
+ }
+
+ if (iobase)
+ rc_board[0].base = iobase;
+ if (iobase1)
+ rc_board[1].base = iobase1;
+ if (iobase2)
+ rc_board[2].base = iobase2;
+ if (iobase3)
+ rc_board[3].base = iobase3;
+
+ return riscom8_init();
+}
+
+void cleanup_module(void)
+{
+ int i;
+
+ rc_release_drivers();
+ for (i = 0; i < RC_NBOARD; i++)
+ if (rc_board[i].flags & RC_BOARD_PRESENT)
+ rc_release_io_range(&rc_board[i]);
+
+}
+#endif /* MODULE */
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov
with Sam's (original) version of this