Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/char/riscom8.c b/drivers/char/riscom8.c
new file mode 100644
index 0000000..55a3a01
--- /dev/null
+++ b/drivers/char/riscom8.c
@@ -0,0 +1,1809 @@
+/*
+ * linux/drivers/char/riscom.c -- RISCom/8 multiport serial driver.
+ *
+ * Copyright (C) 1994-1996 Dmitry Gorodchanin (pgmdsg@ibi.com)
+ *
+ * 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 driver.
+ *
+ *
+ * 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 1.1
+ *
+ * ChangeLog:
+ * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 27-Jun-2001
+ * - get rid of check_region and several cleanups
+ */
+
+#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 <linux/init.h>
+#include <linux/delay.h>
+
+#include <asm/uaccess.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)
+
+#define RS_EVENT_WRITE_WAKEUP 0
+
+static struct riscom_board * IRQ_to_board[16];
+static struct tty_driver *riscom_driver;
+static unsigned char * tmp_buf;
+static DECLARE_MUTEX(tmp_buf_sem);
+
+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] = {
+ {
+ .base = RC_IOBASE1,
+ },
+ {
+ .base = RC_IOBASE2,
+ },
+ {
+ .base = RC_IOBASE3,
+ },
+ {
+ .base = RC_IOBASE4,
+ },
+};
+
+static struct riscom_port rc_port[RC_NBOARD * RC_NPORT];
+
+/* 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,
+ char *name, const char *routine)
+{
+#ifdef RISCOM_PARANOIA_CHECK
+ static const char badmagic[] = KERN_INFO
+ "rc: Warning: bad riscom port magic number for device %s in %s\n";
+ static const char badinfo[] = KERN_INFO
+ "rc: Warning: null riscom port for device %s in %s\n";
+
+ if (!port) {
+ printk(badinfo, name, routine);
+ return 1;
+ }
+ if (port->magic != RISCOM8_MAGIC) {
+ printk(badmagic, name, routine);
+ return 1;
+ }
+#endif
+ return 0;
+}
+
+/*
+ *
+ * Service functions for RISCom/8 driver.
+ *
+ */
+
+/* Get board number from pointer */
+static inline int board_No (struct riscom_board const * bp)
+{
+ return bp - rc_board;
+}
+
+/* Get port number from pointer */
+static inline int port_No (struct riscom_port const * port)
+{
+ return RC_PORT(port - rc_port);
+}
+
+/* Get pointer to board from pointer to port */
+static 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 */
+static 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 */
+static 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 Channel Command Register ready */
+static 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(KERN_INFO "rc%d: Timeout waiting for CCR.\n", board_No(bp));
+}
+
+/*
+ * RISCom/8 probe functions.
+ */
+
+static inline int rc_request_io_range(struct riscom_board * const bp)
+{
+ int i;
+
+ for (i = 0; i < RC_NIOPORT; i++)
+ if (!request_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1,
+ "RISCom/8")) {
+ goto out_release;
+ }
+ return 0;
+out_release:
+ printk(KERN_INFO "rc%d: Skipping probe at 0x%03x. IO address in use.\n",
+ board_No(bp), bp->base);
+ while(--i >= 0)
+ release_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1);
+ return 1;
+}
+
+static 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 */
+static inline void rc_long_delay(unsigned long delay)
+{
+ unsigned long i;
+
+ for (i = jiffies + delay; time_after(i,jiffies); ) ;
+}
+
+/* Reset and setup CD180 chip */
+static void __init 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 __init rc_probe(struct riscom_board *bp)
+{
+ unsigned char val1, val2;
+ int irqs = 0;
+ int retries;
+
+ bp->irq = 0;
+
+ if (rc_request_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(KERN_ERR "rc%d: RISCom/8 Board at 0x%03x not found.\n",
+ board_No(bp), bp->base);
+ goto out_release;
+ }
+
+ /* 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(KERN_ERR "rc%d: RISCom/8 Board at 0x%03x not "
+ "found.\n", board_No(bp), bp->base);
+ goto out_release;
+ }
+ }
+
+ if (irqs <= 0) {
+ printk(KERN_ERR "rc%d: Can't find IRQ for RISCom/8 board "
+ "at 0x%03x.\n", board_No(bp), bp->base);
+ goto out_release;
+ }
+ bp->irq = irqs;
+ bp->flags |= RC_BOARD_PRESENT;
+
+ printk(KERN_INFO "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;
+out_release:
+ rc_release_io_range(bp);
+ return 1;
+}
+
+/*
+ *
+ * Interrupt processing routines.
+ *
+ */
+
+static inline void rc_mark_event(struct riscom_port * port, int event)
+{
+ set_bit(event, &port->event);
+ schedule_work(&port->tqueue);
+}
+
+static 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(KERN_ERR "rc%d: %s interrupt from invalid port %d\n",
+ board_No(bp), what, channel);
+ return NULL;
+}
+
+static 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(KERN_WARNING "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(KERN_ERR "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(KERN_WARNING "rc%d: port %d: Receiver timeout. "
+ "Hardware problems ?\n",
+ board_No(bp), port_No(port));
+ return;
+
+ } else if (status & RCSR_BREAK) {
+ printk(KERN_INFO "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++;
+ schedule_delayed_work(&tty->flip.work, 1);
+}
+
+static 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(KERN_WARNING "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++;
+ }
+ schedule_delayed_work(&tty->flip.work, 1);
+}
+
+static 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_t(int, 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);
+}
+
+static 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
+ schedule_work(&port->tqueue_hangup);
+ }
+
+#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 irqreturn_t 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;
+ int handled = 0;
+
+ bp = IRQ_to_board[irq];
+
+ if (!bp || !(bp->flags & RC_BOARD_ACTIVE)) {
+ return IRQ_NONE;
+ }
+
+ while ((++loop < 16) && ((status = ~(rc_in(bp, RC_BSR))) &
+ (RC_BSR_TOUT | RC_BSR_TINT |
+ RC_BSR_MINT | RC_BSR_RINT))) {
+ handled = 1;
+ if (status & RC_BSR_TOUT)
+ printk(KERN_WARNING "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(KERN_WARNING "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(KERN_WARNING "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(KERN_WARNING "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 */
+ }
+ return IRQ_RETVAL(handled);
+}
+
+/*
+ * Routines for open & close processing.
+ */
+
+/* Called with disabled interrupts */
+static 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;
+
+ return 0;
+}
+
+/* Called with disabled interrupts */
+static 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 */
+
+}
+
+/*
+ * Setting up port characteristics.
+ * Must be called with disabled interrupts
+ */
+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 transmitter & receiver */
+ rc_wait_CCR(bp);
+ rc_out(bp, CD180_CCR, CCR_TXEN | CCR_RXEN);
+ /* Enable interrupts */
+ rc_out(bp, CD180_IER, port->IER);
+ /* And finally 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_zeroed_page() */
+ unsigned long tmp;
+
+ if (!(tmp = get_zeroed_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(KERN_INFO "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(KERN_INFO "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(KERN_INFO "rc%d: rc_shutdown_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)
+{
+ DECLARE_WAITQUEUE(wait, current);
+ 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 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))) {
+ port->flags |= ASYNC_NORMAL_ACTIVE;
+ return 0;
+ }
+
+ 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;
+ rc_out(bp, CD180_MSVR, MSVR_RTS);
+ bp->DTR &= ~(1u << port_No(port));
+ rc_out(bp, RC_DTR, bp->DTR);
+ sti();
+ set_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_CLOSING) &&
+ (do_clocal || CD))
+ break;
+ if (signal_pending(current)) {
+ 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;
+
+ board = RC_BOARD(tty->index);
+ 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(tty->index);
+ if (rc_paranoia_check(port, tty->name, "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;
+
+ 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->name, "close"))
+ return;
+
+ save_flags(flags); cli();
+ if (tty_hung_up_p(filp))
+ goto out;
+
+ bp = port_Board(port);
+ if ((tty->count == 1) && (port->count != 1)) {
+ printk(KERN_INFO "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(KERN_INFO "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)
+ goto out;
+ port->flags |= ASYNC_CLOSING;
+ /*
+ * 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) {
+ msleep_interruptible(jiffies_to_msecs(port->timeout));
+ if (time_after(jiffies, timeout))
+ break;
+ }
+ }
+ rc_shutdown_port(bp, port);
+ if (tty->driver->flush_buffer)
+ tty->driver->flush_buffer(tty);
+ tty_ldisc_flush(tty);
+
+ tty->closing = 0;
+ port->event = 0;
+ port->tty = NULL;
+ if (port->blocked_open) {
+ if (port->close_delay) {
+ msleep_interruptible(jiffies_to_msecs(port->close_delay));
+ }
+ wake_up_interruptible(&port->open_wait);
+ }
+ port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
+ wake_up_interruptible(&port->close_wait);
+out: restore_flags(flags);
+}
+
+static int rc_write(struct tty_struct * tty,
+ 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->name, "rc_write"))
+ return 0;
+
+ bp = port_Board(port);
+
+ if (!tty || !port->xmit_buf || !tmp_buf)
+ return 0;
+
+ save_flags(flags);
+ while (1) {
+ cli();
+ c = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
+ SERIAL_XMIT_SIZE - port->xmit_head));
+ if (c <= 0) {
+ restore_flags(flags);
+ break;
+ }
+
+ 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;
+ }
+
+ cli();
+ 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->name, "rc_put_char"))
+ return;
+
+ if (!tty || !port->xmit_buf)
+ return;
+
+ save_flags(flags); cli();
+
+ if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
+ goto out;
+
+ port->xmit_buf[port->xmit_head++] = ch;
+ port->xmit_head &= SERIAL_XMIT_SIZE - 1;
+ port->xmit_cnt++;
+out: 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->name, "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->name, "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->name, "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->name, "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);
+ tty_wakeup(tty);
+}
+
+static int rc_tiocmget(struct tty_struct *tty, struct file *file)
+{
+ struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ struct riscom_board * bp;
+ unsigned char status;
+ unsigned int result;
+ unsigned long flags;
+
+ if (rc_paranoia_check(port, tty->name, __FUNCTION__))
+ return -ENODEV;
+
+ 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);
+ return result;
+}
+
+static int rc_tiocmset(struct tty_struct *tty, struct file *file,
+ unsigned int set, unsigned int clear)
+{
+ struct riscom_port *port = (struct riscom_port *)tty->driver_data;
+ unsigned long flags;
+ struct riscom_board *bp;
+
+ if (rc_paranoia_check(port, tty->name, __FUNCTION__))
+ return -ENODEV;
+
+ bp = port_Board(port);
+
+ save_flags(flags); cli();
+ if (set & TIOCM_RTS)
+ port->MSVR |= MSVR_RTS;
+ if (set & TIOCM_DTR)
+ bp->DTR &= ~(1u << port_No(port));
+
+ if (clear & TIOCM_RTS)
+ port->MSVR &= ~MSVR_RTS;
+ if (clear & TIOCM_DTR)
+ bp->DTR |= (1u << port_No(port));
+
+ 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;
+}
+
+static 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);
+}
+
+static inline int rc_set_serial_info(struct riscom_port * port,
+ struct serial_struct __user * newinfo)
+{
+ struct serial_struct tmp;
+ struct riscom_board *bp = port_Board(port);
+ int change_speed;
+ unsigned long flags;
+
+ if (copy_from_user(&tmp, newinfo, sizeof(tmp)))
+ return -EFAULT;
+
+#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 (!capable(CAP_SYS_ADMIN)) {
+ 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;
+}
+
+static inline int rc_get_serial_info(struct riscom_port * port,
+ struct serial_struct __user *retinfo)
+{
+ struct serial_struct tmp;
+ struct riscom_board *bp = port_Board(port);
+
+ 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;
+ return copy_to_user(retinfo, &tmp, sizeof(tmp)) ? -EFAULT : 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;
+ void __user *argp = (void __user *)arg;
+ int retval;
+
+ if (rc_paranoia_check(port, tty->name, "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 */
+ break;
+ 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);
+ break;
+ case TIOCGSOFTCAR:
+ return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned __user *)argp);
+ case TIOCSSOFTCAR:
+ if (get_user(arg,(unsigned __user *) argp))
+ return -EFAULT;
+ tty->termios->c_cflag =
+ ((tty->termios->c_cflag & ~CLOCAL) |
+ (arg ? CLOCAL : 0));
+ break;
+ case TIOCGSERIAL:
+ return rc_get_serial_info(port, argp);
+ case TIOCSSERIAL:
+ return rc_set_serial_info(port, argp);
+ 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->name, "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->name, "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->name, "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->name, "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 work queue when the interrupt
+ * routine has signalled that a hangup has occurred. The path of
+ * hangup processing is:
+ *
+ * serial interrupt routine -> (workqueue) ->
+ * 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)
+ tty_hangup(tty); /* FIXME: module removal race still here */
+}
+
+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->name, "rc_hangup"))
+ return;
+
+ bp = port_Board(port);
+
+ rc_shutdown_port(bp, port);
+ port->event = 0;
+ port->count = 0;
+ port->flags &= ~ASYNC_NORMAL_ACTIVE;
+ port->tty = NULL;
+ 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->name, "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_softint(void *private_)
+{
+ struct riscom_port *port = (struct riscom_port *) private_;
+ struct tty_struct *tty;
+
+ if(!(tty = port->tty))
+ return;
+
+ if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event)) {
+ tty_wakeup(tty);
+ wake_up_interruptible(&tty->write_wait);
+ }
+}
+
+static struct tty_operations riscom_ops = {
+ .open = rc_open,
+ .close = rc_close,
+ .write = rc_write,
+ .put_char = rc_put_char,
+ .flush_chars = rc_flush_chars,
+ .write_room = rc_write_room,
+ .chars_in_buffer = rc_chars_in_buffer,
+ .flush_buffer = rc_flush_buffer,
+ .ioctl = rc_ioctl,
+ .throttle = rc_throttle,
+ .unthrottle = rc_unthrottle,
+ .set_termios = rc_set_termios,
+ .stop = rc_stop,
+ .start = rc_start,
+ .hangup = rc_hangup,
+ .tiocmget = rc_tiocmget,
+ .tiocmset = rc_tiocmset,
+};
+
+static inline int rc_init_drivers(void)
+{
+ int error;
+ int i;
+
+ riscom_driver = alloc_tty_driver(RC_NBOARD * RC_NPORT);
+ if (!riscom_driver)
+ return -ENOMEM;
+
+ if (!(tmp_buf = (unsigned char *) get_zeroed_page(GFP_KERNEL))) {
+ printk(KERN_ERR "rc: Couldn't get free page.\n");
+ put_tty_driver(riscom_driver);
+ return 1;
+ }
+ memset(IRQ_to_board, 0, sizeof(IRQ_to_board));
+ riscom_driver->owner = THIS_MODULE;
+ riscom_driver->name = "ttyL";
+ riscom_driver->devfs_name = "tts/L";
+ riscom_driver->major = RISCOM8_NORMAL_MAJOR;
+ riscom_driver->type = TTY_DRIVER_TYPE_SERIAL;
+ riscom_driver->subtype = SERIAL_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;
+ tty_set_operations(riscom_driver, &riscom_ops);
+ if ((error = tty_register_driver(riscom_driver))) {
+ free_page((unsigned long)tmp_buf);
+ put_tty_driver(riscom_driver);
+ printk(KERN_ERR "rc: Couldn't register RISCom/8 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].magic = RISCOM8_MAGIC;
+ INIT_WORK(&rc_port[i].tqueue, do_softint, &rc_port[i]);
+ INIT_WORK(&rc_port[i].tqueue_hangup, do_rc_hangup, &rc_port[i]);
+ rc_port[i].close_delay = 50 * HZ/100;
+ rc_port[i].closing_wait = 3000 * HZ/100;
+ init_waitqueue_head(&rc_port[i].open_wait);
+ init_waitqueue_head(&rc_port[i].close_wait);
+ }
+
+ return 0;
+}
+
+static void rc_release_drivers(void)
+{
+ unsigned long flags;
+
+ save_flags(flags);
+ cli();
+ free_page((unsigned long)tmp_buf);
+ tty_unregister_driver(riscom_driver);
+ put_tty_driver(riscom_driver);
+ restore_flags(flags);
+}
+
+#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 will be no probing at default
+ * addresses in this case.
+ *
+ */
+static int __init riscom8_setup(char *str)
+{
+ int ints[RC_NBOARD];
+ int i;
+
+ str = get_options(str, ARRAY_SIZE(ints), ints);
+
+ for (i = 0; i < RC_NBOARD; i++) {
+ if (i < ints[0])
+ rc_board[i].base = ints[i+1];
+ else
+ rc_board[i].base = 0;
+ }
+ return 1;
+}
+
+__setup("riscom8=", riscom8_setup);
+#endif
+
+static char banner[] __initdata =
+ KERN_INFO "rc: SDL RISCom/8 card driver v1.1, (c) D.Gorodchanin "
+ "1994-1996.\n";
+static char no_boards_msg[] __initdata =
+ KERN_INFO "rc: No RISCom/8 boards detected.\n";
+
+/*
+ * This routine must be called by kernel at boot time
+ */
+static int __init riscom8_init(void)
+{
+ int i;
+ int found = 0;
+
+ printk(banner);
+
+ 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(no_boards_msg);
+ return -EIO;
+ }
+ return 0;
+}
+
+#ifdef MODULE
+static int iobase;
+static int iobase1;
+static int iobase2;
+static int iobase3;
+MODULE_PARM(iobase, "i");
+MODULE_PARM(iobase1, "i");
+MODULE_PARM(iobase2, "i");
+MODULE_PARM(iobase3, "i");
+
+MODULE_LICENSE("GPL");
+#endif /* MODULE */
+
+/*
+ * You can setup up to 4 boards (current value of RC_NBOARD)
+ * by specifying "iobase=0xXXX iobase1=0xXXX ..." as insmod parameter.
+ *
+ */
+static int __init riscom8_init_module (void)
+{
+#ifdef MODULE
+ 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;
+#endif /* MODULE */
+
+ return riscom8_init();
+}
+
+static void __exit riscom8_exit_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]);
+
+}
+
+module_init(riscom8_init_module);
+module_exit(riscom8_exit_module);
+