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/specialix.c b/drivers/char/specialix.c
new file mode 100644
index 0000000..c789d5c
--- /dev/null
+++ b/drivers/char/specialix.c
@@ -0,0 +1,2610 @@
+/*
+ * specialix.c -- specialix IO8+ multiport serial driver.
+ *
+ * Copyright (C) 1997 Roger Wolff (R.E.Wolff@BitWizard.nl)
+ * Copyright (C) 1994-1996 Dmitry Gorodchanin (pgmdsg@ibi.com)
+ *
+ * Specialix pays for the development and support of this driver.
+ * Please DO contact io8-linux@specialix.co.uk if you require
+ * support. But please read the documentation (specialix.txt)
+ * first.
+ *
+ * This driver was developped in the BitWizard linux device
+ * driver service. If you require a linux device driver for your
+ * product, please contact devices@BitWizard.nl for a quote.
+ *
+ * This code is firmly based on the riscom/8 serial driver,
+ * written by Dmitry Gorodchanin. The specialix IO8+ card
+ * programming information was obtained from the CL-CD1865 Data
+ * Book, and Specialix document number 6200059: IO8+ Hardware
+ * Functional Specification.
+ *
+ * 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 history:
+ *
+ * Revision 1.0: April 1st 1997.
+ * Initial release for alpha testing.
+ * Revision 1.1: April 14th 1997.
+ * Incorporated Richard Hudsons suggestions,
+ * removed some debugging printk's.
+ * Revision 1.2: April 15th 1997.
+ * Ported to 2.1.x kernels.
+ * Revision 1.3: April 17th 1997
+ * Backported to 2.0. (Compatibility macros).
+ * Revision 1.4: April 18th 1997
+ * Fixed DTR/RTS bug that caused the card to indicate
+ * "don't send data" to a modem after the password prompt.
+ * Fixed bug for premature (fake) interrupts.
+ * Revision 1.5: April 19th 1997
+ * fixed a minor typo in the header file, cleanup a little.
+ * performance warnings are now MAXed at once per minute.
+ * Revision 1.6: May 23 1997
+ * Changed the specialix=... format to include interrupt.
+ * Revision 1.7: May 27 1997
+ * Made many more debug printk's a compile time option.
+ * Revision 1.8: Jul 1 1997
+ * port to linux-2.1.43 kernel.
+ * Revision 1.9: Oct 9 1998
+ * Added stuff for the IO8+/PCI version.
+ * Revision 1.10: Oct 22 1999 / Jan 21 2000.
+ * Added stuff for setserial.
+ * Nicolas Mailhot (Nicolas.Mailhot@email.enst.fr)
+ *
+ */
+
+#define VERSION "1.11"
+
+
+/*
+ * There is a bunch of documentation about the card, jumpers, config
+ * settings, restrictions, cables, device names and numbers in
+ * Documentation/specialix.txt
+ */
+
+#include <linux/config.h>
+#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/delay.h>
+#include <linux/version.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+
+#include "specialix_io8.h"
+#include "cd1865.h"
+
+
+/*
+ This driver can spew a whole lot of debugging output at you. If you
+ need maximum performance, you should disable the DEBUG define. To
+ aid in debugging in the field, I'm leaving the compile-time debug
+ features enabled, and disable them "runtime". That allows me to
+ instruct people with problems to enable debugging without requiring
+ them to recompile...
+*/
+#define DEBUG
+
+static int sx_debug;
+static int sx_rxfifo = SPECIALIX_RXFIFO;
+
+#ifdef DEBUG
+#define dprintk(f, str...) if (sx_debug & f) printk (str)
+#else
+#define dprintk(f, str...) /* nothing */
+#endif
+
+#define SX_DEBUG_FLOW 0x0001
+#define SX_DEBUG_DATA 0x0002
+#define SX_DEBUG_PROBE 0x0004
+#define SX_DEBUG_CHAN 0x0008
+#define SX_DEBUG_INIT 0x0010
+#define SX_DEBUG_RX 0x0020
+#define SX_DEBUG_TX 0x0040
+#define SX_DEBUG_IRQ 0x0080
+#define SX_DEBUG_OPEN 0x0100
+#define SX_DEBUG_TERMIOS 0x0200
+#define SX_DEBUG_SIGNALS 0x0400
+#define SX_DEBUG_FIFO 0x0800
+
+
+#define func_enter() dprintk (SX_DEBUG_FLOW, "io8: enter %s\n",__FUNCTION__)
+#define func_exit() dprintk (SX_DEBUG_FLOW, "io8: exit %s\n", __FUNCTION__)
+
+#define jiffies_from_ms(a) ((((a) * HZ)/1000)+1)
+
+
+/* Configurable options: */
+
+/* Am I paranoid or not ? ;-) */
+#define SPECIALIX_PARANOIA_CHECK
+
+/* Do I trust the IRQ from the card? (enabeling it doesn't seem to help)
+ When the IRQ routine leaves the chip in a state that is keeps on
+ requiring attention, the timer doesn't help either. */
+#undef SPECIALIX_TIMER
+
+#ifdef SPECIALIX_TIMER
+static int sx_poll = HZ;
+#endif
+
+
+
+/*
+ * The following defines are mostly for testing purposes. But if you need
+ * some nice reporting in your syslog, you can define them also.
+ */
+#undef SX_REPORT_FIFO
+#undef SX_REPORT_OVERRUN
+
+
+
+#ifdef CONFIG_SPECIALIX_RTSCTS
+#define SX_CRTSCTS(bla) 1
+#else
+#define SX_CRTSCTS(tty) C_CRTSCTS(tty)
+#endif
+
+
+/* Used to be outb (0xff, 0x80); */
+#define short_pause() udelay (1)
+
+
+#define SPECIALIX_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)
+
+#undef RS_EVENT_WRITE_WAKEUP
+#define RS_EVENT_WRITE_WAKEUP 0
+
+static struct tty_driver *specialix_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, 115200, 0,
+};
+
+static struct specialix_board sx_board[SX_NBOARD] = {
+ { 0, SX_IOBASE1, 9, },
+ { 0, SX_IOBASE2, 11, },
+ { 0, SX_IOBASE3, 12, },
+ { 0, SX_IOBASE4, 15, },
+};
+
+static struct specialix_port sx_port[SX_NBOARD * SX_NPORT];
+
+
+#ifdef SPECIALIX_TIMER
+static struct timer_list missed_irq_timer;
+static irqreturn_t sx_interrupt(int irq, void * dev_id, struct pt_regs * regs);
+#endif
+
+
+
+static inline int sx_paranoia_check(struct specialix_port const * port,
+ char *name, const char *routine)
+{
+#ifdef SPECIALIX_PARANOIA_CHECK
+ static const char *badmagic =
+ KERN_ERR "sx: Warning: bad specialix port magic number for device %s in %s\n";
+ static const char *badinfo =
+ KERN_ERR "sx: Warning: null specialix port for device %s in %s\n";
+
+ if (!port) {
+ printk(badinfo, name, routine);
+ return 1;
+ }
+ if (port->magic != SPECIALIX_MAGIC) {
+ printk(badmagic, name, routine);
+ return 1;
+ }
+#endif
+ return 0;
+}
+
+
+/*
+ *
+ * Service functions for specialix IO8+ driver.
+ *
+ */
+
+/* Get board number from pointer */
+static inline int board_No (struct specialix_board * bp)
+{
+ return bp - sx_board;
+}
+
+
+/* Get port number from pointer */
+static inline int port_No (struct specialix_port const * port)
+{
+ return SX_PORT(port - sx_port);
+}
+
+
+/* Get pointer to board from pointer to port */
+static inline struct specialix_board * port_Board(struct specialix_port const * port)
+{
+ return &sx_board[SX_BOARD(port - sx_port)];
+}
+
+
+/* Input Byte from CL CD186x register */
+static inline unsigned char sx_in(struct specialix_board * bp, unsigned short reg)
+{
+ bp->reg = reg | 0x80;
+ outb (reg | 0x80, bp->base + SX_ADDR_REG);
+ return inb (bp->base + SX_DATA_REG);
+}
+
+
+/* Output Byte to CL CD186x register */
+static inline void sx_out(struct specialix_board * bp, unsigned short reg,
+ unsigned char val)
+{
+ bp->reg = reg | 0x80;
+ outb (reg | 0x80, bp->base + SX_ADDR_REG);
+ outb (val, bp->base + SX_DATA_REG);
+}
+
+
+/* Input Byte from CL CD186x register */
+static inline unsigned char sx_in_off(struct specialix_board * bp, unsigned short reg)
+{
+ bp->reg = reg;
+ outb (reg, bp->base + SX_ADDR_REG);
+ return inb (bp->base + SX_DATA_REG);
+}
+
+
+/* Output Byte to CL CD186x register */
+static inline void sx_out_off(struct specialix_board * bp, unsigned short reg,
+ unsigned char val)
+{
+ bp->reg = reg;
+ outb (reg, bp->base + SX_ADDR_REG);
+ outb (val, bp->base + SX_DATA_REG);
+}
+
+
+/* Wait for Channel Command Register ready */
+static inline void sx_wait_CCR(struct specialix_board * bp)
+{
+ unsigned long delay, flags;
+ unsigned char ccr;
+
+ for (delay = SX_CCR_TIMEOUT; delay; delay--) {
+ spin_lock_irqsave(&bp->lock, flags);
+ ccr = sx_in(bp, CD186x_CCR);
+ spin_unlock_irqrestore(&bp->lock, flags);
+ if (!ccr)
+ return;
+ udelay (1);
+ }
+
+ printk(KERN_ERR "sx%d: Timeout waiting for CCR.\n", board_No(bp));
+}
+
+
+/* Wait for Channel Command Register ready */
+static inline void sx_wait_CCR_off(struct specialix_board * bp)
+{
+ unsigned long delay;
+ unsigned char crr;
+ unsigned long flags;
+
+ for (delay = SX_CCR_TIMEOUT; delay; delay--) {
+ spin_lock_irqsave(&bp->lock, flags);
+ crr = sx_in_off(bp, CD186x_CCR);
+ spin_unlock_irqrestore(&bp->lock, flags);
+ if (!crr)
+ return;
+ udelay (1);
+ }
+
+ printk(KERN_ERR "sx%d: Timeout waiting for CCR.\n", board_No(bp));
+}
+
+
+/*
+ * specialix IO8+ IO range functions.
+ */
+
+static inline int sx_check_io_range(struct specialix_board * bp)
+{
+ return check_region (bp->base, SX_IO_SPACE);
+}
+
+
+static inline void sx_request_io_range(struct specialix_board * bp)
+{
+ request_region(bp->base,
+ bp->flags&SX_BOARD_IS_PCI?SX_PCI_IO_SPACE:SX_IO_SPACE,
+ "specialix IO8+" );
+}
+
+
+static inline void sx_release_io_range(struct specialix_board * bp)
+{
+ release_region(bp->base,
+ bp->flags&SX_BOARD_IS_PCI?SX_PCI_IO_SPACE:SX_IO_SPACE);
+}
+
+
+/* Must be called with enabled interrupts */
+/* Ugly. Very ugly. Don't use this for anything else than initialization
+ code */
+static inline void sx_long_delay(unsigned long delay)
+{
+ unsigned long i;
+
+ for (i = jiffies + delay; time_after(i, jiffies); ) ;
+}
+
+
+
+/* Set the IRQ using the RTS lines that run to the PAL on the board.... */
+static int sx_set_irq ( struct specialix_board *bp)
+{
+ int virq;
+ int i;
+ unsigned long flags;
+
+ if (bp->flags & SX_BOARD_IS_PCI)
+ return 1;
+ switch (bp->irq) {
+ /* In the same order as in the docs... */
+ case 15: virq = 0;break;
+ case 12: virq = 1;break;
+ case 11: virq = 2;break;
+ case 9: virq = 3;break;
+ default: printk (KERN_ERR "Speclialix: cannot set irq to %d.\n", bp->irq);
+ return 0;
+ }
+ spin_lock_irqsave(&bp->lock, flags);
+ for (i=0;i<2;i++) {
+ sx_out(bp, CD186x_CAR, i);
+ sx_out(bp, CD186x_MSVRTS, ((virq >> i) & 0x1)? MSVR_RTS:0);
+ }
+ spin_unlock_irqrestore(&bp->lock, flags);
+ return 1;
+}
+
+
+/* Reset and setup CD186x chip */
+static int sx_init_CD186x(struct specialix_board * bp)
+{
+ unsigned long flags;
+ int scaler;
+ int rv = 1;
+
+ func_enter();
+ sx_wait_CCR_off(bp); /* Wait for CCR ready */
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out_off(bp, CD186x_CCR, CCR_HARDRESET); /* Reset CD186x chip */
+ spin_unlock_irqrestore(&bp->lock, flags);
+ sx_long_delay(HZ/20); /* Delay 0.05 sec */
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out_off(bp, CD186x_GIVR, SX_ID); /* Set ID for this chip */
+ sx_out_off(bp, CD186x_GICR, 0); /* Clear all bits */
+ sx_out_off(bp, CD186x_PILR1, SX_ACK_MINT); /* Prio for modem intr */
+ sx_out_off(bp, CD186x_PILR2, SX_ACK_TINT); /* Prio for transmitter intr */
+ sx_out_off(bp, CD186x_PILR3, SX_ACK_RINT); /* Prio for receiver intr */
+ /* Set RegAckEn */
+ sx_out_off(bp, CD186x_SRCR, sx_in (bp, CD186x_SRCR) | SRCR_REGACKEN);
+
+ /* Setting up prescaler. We need 4 ticks per 1 ms */
+ scaler = SX_OSCFREQ/SPECIALIX_TPS;
+
+ sx_out_off(bp, CD186x_PPRH, scaler >> 8);
+ sx_out_off(bp, CD186x_PPRL, scaler & 0xff);
+ spin_unlock_irqrestore(&bp->lock, flags);
+
+ if (!sx_set_irq (bp)) {
+ /* Figure out how to pass this along... */
+ printk (KERN_ERR "Cannot set irq to %d.\n", bp->irq);
+ rv = 0;
+ }
+
+ func_exit();
+ return rv;
+}
+
+
+static int read_cross_byte (struct specialix_board *bp, int reg, int bit)
+{
+ int i;
+ int t;
+ unsigned long flags;
+
+ spin_lock_irqsave(&bp->lock, flags);
+ for (i=0, t=0;i<8;i++) {
+ sx_out_off (bp, CD186x_CAR, i);
+ if (sx_in_off (bp, reg) & bit)
+ t |= 1 << i;
+ }
+ spin_unlock_irqrestore(&bp->lock, flags);
+
+ return t;
+}
+
+
+#ifdef SPECIALIX_TIMER
+void missed_irq (unsigned long data)
+{
+ unsigned char irq;
+ unsigned long flags;
+ struct specialix_board *bp = (struct specialix_board *)data;
+
+ spin_lock_irqsave(&bp->lock, flags);
+ irq = sx_in ((struct specialix_board *)data, CD186x_SRSR) &
+ (SRSR_RREQint |
+ SRSR_TREQint |
+ SRSR_MREQint);
+ spin_unlock_irqrestore(&bp->lock, flags);
+ if (irq) {
+ printk (KERN_INFO "Missed interrupt... Calling int from timer. \n");
+ sx_interrupt (((struct specialix_board *)data)->irq,
+ (void*)data, NULL);
+ }
+ missed_irq_timer.expires = jiffies + sx_poll;
+ add_timer (&missed_irq_timer);
+}
+#endif
+
+
+
+/* Main probing routine, also sets irq. */
+static int sx_probe(struct specialix_board *bp)
+{
+ unsigned char val1, val2;
+#if 0
+ int irqs = 0;
+ int retries;
+#endif
+ int rev;
+ int chip;
+
+ func_enter();
+
+ if (sx_check_io_range(bp)) {
+ func_exit();
+ return 1;
+ }
+
+ /* Are the I/O ports here ? */
+ sx_out_off(bp, CD186x_PPRL, 0x5a);
+ short_pause ();
+ val1 = sx_in_off(bp, CD186x_PPRL);
+
+ sx_out_off(bp, CD186x_PPRL, 0xa5);
+ short_pause ();
+ val2 = sx_in_off(bp, CD186x_PPRL);
+
+
+ if ((val1 != 0x5a) || (val2 != 0xa5)) {
+ printk(KERN_INFO "sx%d: specialix IO8+ Board at 0x%03x not found.\n",
+ board_No(bp), bp->base);
+ func_exit();
+ return 1;
+ }
+
+ /* Check the DSR lines that Specialix uses as board
+ identification */
+ val1 = read_cross_byte (bp, CD186x_MSVR, MSVR_DSR);
+ val2 = read_cross_byte (bp, CD186x_MSVR, MSVR_RTS);
+ dprintk (SX_DEBUG_INIT, "sx%d: DSR lines are: %02x, rts lines are: %02x\n",
+ board_No(bp), val1, val2);
+
+ /* They managed to switch the bit order between the docs and
+ the IO8+ card. The new PCI card now conforms to old docs.
+ They changed the PCI docs to reflect the situation on the
+ old card. */
+ val2 = (bp->flags & SX_BOARD_IS_PCI)?0x4d : 0xb2;
+ if (val1 != val2) {
+ printk(KERN_INFO "sx%d: specialix IO8+ ID %02x at 0x%03x not found (%02x).\n",
+ board_No(bp), val2, bp->base, val1);
+ func_exit();
+ return 1;
+ }
+
+
+#if 0
+ /* It's time to find IRQ for this board */
+ for (retries = 0; retries < 5 && irqs <= 0; retries++) {
+ irqs = probe_irq_on();
+ sx_init_CD186x(bp); /* Reset CD186x chip */
+ sx_out(bp, CD186x_CAR, 2); /* Select port 2 */
+ sx_wait_CCR(bp);
+ sx_out(bp, CD186x_CCR, CCR_TXEN); /* Enable transmitter */
+ sx_out(bp, CD186x_IER, IER_TXRDY); /* Enable tx empty intr */
+ sx_long_delay(HZ/20);
+ irqs = probe_irq_off(irqs);
+
+ dprintk (SX_DEBUG_INIT, "SRSR = %02x, ", sx_in(bp, CD186x_SRSR));
+ dprintk (SX_DEBUG_INIT, "TRAR = %02x, ", sx_in(bp, CD186x_TRAR));
+ dprintk (SX_DEBUG_INIT, "GIVR = %02x, ", sx_in(bp, CD186x_GIVR));
+ dprintk (SX_DEBUG_INIT, "GICR = %02x, ", sx_in(bp, CD186x_GICR));
+ dprintk (SX_DEBUG_INIT, "\n");
+
+ /* Reset CD186x again */
+ if (!sx_init_CD186x(bp)) {
+ /* Hmmm. This is dead code anyway. */
+ }
+
+ dprintk (SX_DEBUG_INIT "val1 = %02x, val2 = %02x, val3 = %02x.\n",
+ val1, val2, val3);
+
+ }
+
+#if 0
+ if (irqs <= 0) {
+ printk(KERN_ERR "sx%d: Can't find IRQ for specialix IO8+ board at 0x%03x.\n",
+ board_No(bp), bp->base);
+ func_exit();
+ return 1;
+ }
+#endif
+ printk (KERN_INFO "Started with irq=%d, but now have irq=%d.\n", bp->irq, irqs);
+ if (irqs > 0)
+ bp->irq = irqs;
+#endif
+ /* Reset CD186x again */
+ if (!sx_init_CD186x(bp)) {
+ func_exit();
+ return -EIO;
+ }
+
+ sx_request_io_range(bp);
+ bp->flags |= SX_BOARD_PRESENT;
+
+ /* Chip revcode pkgtype
+ GFRCR SRCR bit 7
+ CD180 rev B 0x81 0
+ CD180 rev C 0x82 0
+ CD1864 rev A 0x82 1
+ CD1865 rev A 0x83 1 -- Do not use!!! Does not work.
+ CD1865 rev B 0x84 1
+ -- Thanks to Gwen Wang, Cirrus Logic.
+ */
+
+ switch (sx_in_off(bp, CD186x_GFRCR)) {
+ case 0x82:chip = 1864;rev='A';break;
+ case 0x83:chip = 1865;rev='A';break;
+ case 0x84:chip = 1865;rev='B';break;
+ case 0x85:chip = 1865;rev='C';break; /* Does not exist at this time */
+ default:chip=-1;rev='x';
+ }
+
+ dprintk (SX_DEBUG_INIT, " GFCR = 0x%02x\n", sx_in_off(bp, CD186x_GFRCR) );
+
+#ifdef SPECIALIX_TIMER
+ init_timer (&missed_irq_timer);
+ missed_irq_timer.function = missed_irq;
+ missed_irq_timer.data = (unsigned long) bp;
+ missed_irq_timer.expires = jiffies + sx_poll;
+ add_timer (&missed_irq_timer);
+#endif
+
+ printk(KERN_INFO"sx%d: specialix IO8+ board detected at 0x%03x, IRQ %d, CD%d Rev. %c.\n",
+ board_No(bp),
+ bp->base, bp->irq,
+ chip, rev);
+
+ func_exit();
+ return 0;
+}
+
+/*
+ *
+ * Interrupt processing routines.
+ * */
+
+static inline void sx_mark_event(struct specialix_port * port, int event)
+{
+ func_enter();
+
+ set_bit(event, &port->event);
+ schedule_work(&port->tqueue);
+
+ func_exit();
+}
+
+
+static inline struct specialix_port * sx_get_port(struct specialix_board * bp,
+ unsigned char const * what)
+{
+ unsigned char channel;
+ struct specialix_port * port = NULL;
+
+ channel = sx_in(bp, CD186x_GICR) >> GICR_CHAN_OFF;
+ dprintk (SX_DEBUG_CHAN, "channel: %d\n", channel);
+ if (channel < CD186x_NCH) {
+ port = &sx_port[board_No(bp) * SX_NPORT + channel];
+ dprintk (SX_DEBUG_CHAN, "port: %d %p flags: 0x%x\n",board_No(bp) * SX_NPORT + channel, port, port->flags & ASYNC_INITIALIZED);
+
+ if (port->flags & ASYNC_INITIALIZED) {
+ dprintk (SX_DEBUG_CHAN, "port: %d %p\n", channel, port);
+ func_exit();
+ return port;
+ }
+ }
+ printk(KERN_INFO "sx%d: %s interrupt from invalid port %d\n",
+ board_No(bp), what, channel);
+ return NULL;
+}
+
+
+static inline void sx_receive_exc(struct specialix_board * bp)
+{
+ struct specialix_port *port;
+ struct tty_struct *tty;
+ unsigned char status;
+ unsigned char ch;
+
+ func_enter();
+
+ port = sx_get_port(bp, "Receive");
+ if (!port) {
+ dprintk (SX_DEBUG_RX, "Hmm, couldn't find port.\n");
+ func_exit();
+ return;
+ }
+ tty = port->tty;
+ dprintk (SX_DEBUG_RX, "port: %p count: %d BUFF_SIZE: %d\n",
+ port, tty->flip.count, TTY_FLIPBUF_SIZE);
+
+ status = sx_in(bp, CD186x_RCSR);
+
+ dprintk (SX_DEBUG_RX, "status: 0x%x\n", status);
+ if (status & RCSR_OE) {
+ port->overrun++;
+ dprintk(SX_DEBUG_FIFO, "sx%d: port %d: Overrun. Total %ld overruns.\n",
+ board_No(bp), port_No(port), port->overrun);
+ }
+ status &= port->mark_mask;
+
+ /* This flip buffer check needs to be below the reading of the
+ status register to reset the chip's IRQ.... */
+ if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
+ dprintk(SX_DEBUG_FIFO, "sx%d: port %d: Working around flip buffer overflow.\n",
+ board_No(bp), port_No(port));
+ func_exit();
+ return;
+ }
+
+ ch = sx_in(bp, CD186x_RDR);
+ if (!status) {
+ func_exit();
+ return;
+ }
+ if (status & RCSR_TOUT) {
+ printk(KERN_INFO "sx%d: port %d: Receiver timeout. Hardware problems ?\n",
+ board_No(bp), port_No(port));
+ func_exit();
+ return;
+
+ } else if (status & RCSR_BREAK) {
+ dprintk(SX_DEBUG_RX, "sx%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);
+
+ func_exit();
+}
+
+
+static inline void sx_receive(struct specialix_board * bp)
+{
+ struct specialix_port *port;
+ struct tty_struct *tty;
+ unsigned char count;
+
+ func_enter();
+
+ if (!(port = sx_get_port(bp, "Receive"))) {
+ dprintk (SX_DEBUG_RX, "Hmm, couldn't find port.\n");
+ func_exit();
+ return;
+ }
+ tty = port->tty;
+
+ count = sx_in(bp, CD186x_RDCR);
+ dprintk (SX_DEBUG_RX, "port: %p: count: %d\n", port, count);
+ port->hits[count > 8 ? 9 : count]++;
+
+ while (count--) {
+ if (tty->flip.count >= TTY_FLIPBUF_SIZE) {
+ printk(KERN_INFO "sx%d: port %d: Working around flip buffer overflow.\n",
+ board_No(bp), port_No(port));
+ break;
+ }
+ *tty->flip.char_buf_ptr++ = sx_in(bp, CD186x_RDR);
+ *tty->flip.flag_buf_ptr++ = 0;
+ tty->flip.count++;
+ }
+ schedule_delayed_work(&tty->flip.work, 1);
+
+ func_exit();
+}
+
+
+static inline void sx_transmit(struct specialix_board * bp)
+{
+ struct specialix_port *port;
+ struct tty_struct *tty;
+ unsigned char count;
+
+ func_enter();
+ if (!(port = sx_get_port(bp, "Transmit"))) {
+ func_exit();
+ return;
+ }
+ dprintk (SX_DEBUG_TX, "port: %p\n", port);
+ tty = port->tty;
+
+ if (port->IER & IER_TXEMPTY) {
+ /* FIFO drained */
+ sx_out(bp, CD186x_CAR, port_No(port));
+ port->IER &= ~IER_TXEMPTY;
+ sx_out(bp, CD186x_IER, port->IER);
+ func_exit();
+ return;
+ }
+
+ if ((port->xmit_cnt <= 0 && !port->break_length)
+ || tty->stopped || tty->hw_stopped) {
+ sx_out(bp, CD186x_CAR, port_No(port));
+ port->IER &= ~IER_TXRDY;
+ sx_out(bp, CD186x_IER, port->IER);
+ func_exit();
+ return;
+ }
+
+ if (port->break_length) {
+ if (port->break_length > 0) {
+ if (port->COR2 & COR2_ETC) {
+ sx_out(bp, CD186x_TDR, CD186x_C_ESC);
+ sx_out(bp, CD186x_TDR, CD186x_C_SBRK);
+ port->COR2 &= ~COR2_ETC;
+ }
+ count = min_t(int, port->break_length, 0xff);
+ sx_out(bp, CD186x_TDR, CD186x_C_ESC);
+ sx_out(bp, CD186x_TDR, CD186x_C_DELAY);
+ sx_out(bp, CD186x_TDR, count);
+ if (!(port->break_length -= count))
+ port->break_length--;
+ } else {
+ sx_out(bp, CD186x_TDR, CD186x_C_ESC);
+ sx_out(bp, CD186x_TDR, CD186x_C_EBRK);
+ sx_out(bp, CD186x_COR2, port->COR2);
+ sx_wait_CCR(bp);
+ sx_out(bp, CD186x_CCR, CCR_CORCHG2);
+ port->break_length = 0;
+ }
+
+ func_exit();
+ return;
+ }
+
+ count = CD186x_NFIFO;
+ do {
+ sx_out(bp, CD186x_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) {
+ sx_out(bp, CD186x_CAR, port_No(port));
+ port->IER &= ~IER_TXRDY;
+ sx_out(bp, CD186x_IER, port->IER);
+ }
+ if (port->xmit_cnt <= port->wakeup_chars)
+ sx_mark_event(port, RS_EVENT_WRITE_WAKEUP);
+
+ func_exit();
+}
+
+
+static inline void sx_check_modem(struct specialix_board * bp)
+{
+ struct specialix_port *port;
+ struct tty_struct *tty;
+ unsigned char mcr;
+ int msvr_cd;
+
+ dprintk (SX_DEBUG_SIGNALS, "Modem intr. ");
+ if (!(port = sx_get_port(bp, "Modem")))
+ return;
+
+ tty = port->tty;
+
+ mcr = sx_in(bp, CD186x_MCR);
+ printk ("mcr = %02x.\n", mcr);
+
+ if ((mcr & MCR_CDCHG)) {
+ dprintk (SX_DEBUG_SIGNALS, "CD just changed... ");
+ msvr_cd = sx_in(bp, CD186x_MSVR) & MSVR_CD;
+ if (msvr_cd) {
+ dprintk (SX_DEBUG_SIGNALS, "Waking up guys in open.\n");
+ wake_up_interruptible(&port->open_wait);
+ } else {
+ dprintk (SX_DEBUG_SIGNALS, "Sending HUP.\n");
+ schedule_work(&port->tqueue_hangup);
+ }
+ }
+
+#ifdef SPECIALIX_BRAIN_DAMAGED_CTS
+ if (mcr & MCR_CTSCHG) {
+ if (sx_in(bp, CD186x_MSVR) & MSVR_CTS) {
+ tty->hw_stopped = 0;
+ port->IER |= IER_TXRDY;
+ if (port->xmit_cnt <= port->wakeup_chars)
+ sx_mark_event(port, RS_EVENT_WRITE_WAKEUP);
+ } else {
+ tty->hw_stopped = 1;
+ port->IER &= ~IER_TXRDY;
+ }
+ sx_out(bp, CD186x_IER, port->IER);
+ }
+ if (mcr & MCR_DSSXHG) {
+ if (sx_in(bp, CD186x_MSVR) & MSVR_DSR) {
+ tty->hw_stopped = 0;
+ port->IER |= IER_TXRDY;
+ if (port->xmit_cnt <= port->wakeup_chars)
+ sx_mark_event(port, RS_EVENT_WRITE_WAKEUP);
+ } else {
+ tty->hw_stopped = 1;
+ port->IER &= ~IER_TXRDY;
+ }
+ sx_out(bp, CD186x_IER, port->IER);
+ }
+#endif /* SPECIALIX_BRAIN_DAMAGED_CTS */
+
+ /* Clear change bits */
+ sx_out(bp, CD186x_MCR, 0);
+}
+
+
+/* The main interrupt processing routine */
+static irqreturn_t sx_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+{
+ unsigned char status;
+ unsigned char ack;
+ struct specialix_board *bp;
+ unsigned long loop = 0;
+ int saved_reg;
+ unsigned long flags;
+
+ func_enter();
+
+ bp = dev_id;
+ spin_lock_irqsave(&bp->lock, flags);
+
+ dprintk (SX_DEBUG_FLOW, "enter %s port %d room: %ld\n", __FUNCTION__, port_No(sx_get_port(bp, "INT")), SERIAL_XMIT_SIZE - sx_get_port(bp, "ITN")->xmit_cnt - 1);
+ if (!bp || !(bp->flags & SX_BOARD_ACTIVE)) {
+ dprintk (SX_DEBUG_IRQ, "sx: False interrupt. irq %d.\n", irq);
+ spin_unlock_irqrestore(&bp->lock, flags);
+ func_exit();
+ return IRQ_NONE;
+ }
+
+ saved_reg = bp->reg;
+
+ while ((++loop < 16) && (status = (sx_in(bp, CD186x_SRSR) &
+ (SRSR_RREQint |
+ SRSR_TREQint |
+ SRSR_MREQint)))) {
+ if (status & SRSR_RREQint) {
+ ack = sx_in(bp, CD186x_RRAR);
+
+ if (ack == (SX_ID | GIVR_IT_RCV))
+ sx_receive(bp);
+ else if (ack == (SX_ID | GIVR_IT_REXC))
+ sx_receive_exc(bp);
+ else
+ printk(KERN_ERR "sx%d: status: 0x%x Bad receive ack 0x%02x.\n",
+ board_No(bp), status, ack);
+
+ } else if (status & SRSR_TREQint) {
+ ack = sx_in(bp, CD186x_TRAR);
+
+ if (ack == (SX_ID | GIVR_IT_TX))
+ sx_transmit(bp);
+ else
+ printk(KERN_ERR "sx%d: status: 0x%x Bad transmit ack 0x%02x. port: %d\n",
+ board_No(bp), status, ack, port_No (sx_get_port (bp, "Int")));
+ } else if (status & SRSR_MREQint) {
+ ack = sx_in(bp, CD186x_MRAR);
+
+ if (ack == (SX_ID | GIVR_IT_MODEM))
+ sx_check_modem(bp);
+ else
+ printk(KERN_ERR "sx%d: status: 0x%x Bad modem ack 0x%02x.\n",
+ board_No(bp), status, ack);
+
+ }
+
+ sx_out(bp, CD186x_EOIR, 0); /* Mark end of interrupt */
+ }
+ bp->reg = saved_reg;
+ outb (bp->reg, bp->base + SX_ADDR_REG);
+ spin_unlock_irqrestore(&bp->lock, flags);
+ func_exit();
+ return IRQ_HANDLED;
+}
+
+
+/*
+ * Routines for open & close processing.
+ */
+
+static void turn_ints_off (struct specialix_board *bp)
+{
+ unsigned long flags;
+
+ func_enter();
+ if (bp->flags & SX_BOARD_IS_PCI) {
+ /* This was intended for enabeling the interrupt on the
+ * PCI card. However it seems that it's already enabled
+ * and as PCI interrupts can be shared, there is no real
+ * reason to have to turn it off. */
+ }
+
+ spin_lock_irqsave(&bp->lock, flags);
+ (void) sx_in_off (bp, 0); /* Turn off interrupts. */
+ spin_unlock_irqrestore(&bp->lock, flags);
+
+ func_exit();
+}
+
+static void turn_ints_on (struct specialix_board *bp)
+{
+ unsigned long flags;
+
+ func_enter();
+
+ if (bp->flags & SX_BOARD_IS_PCI) {
+ /* play with the PCI chip. See comment above. */
+ }
+ spin_lock_irqsave(&bp->lock, flags);
+ (void) sx_in (bp, 0); /* Turn ON interrupts. */
+ spin_unlock_irqrestore(&bp->lock, flags);
+
+ func_exit();
+}
+
+
+/* Called with disabled interrupts */
+static inline int sx_setup_board(struct specialix_board * bp)
+{
+ int error;
+
+ if (bp->flags & SX_BOARD_ACTIVE)
+ return 0;
+
+ if (bp->flags & SX_BOARD_IS_PCI)
+ error = request_irq(bp->irq, sx_interrupt, SA_INTERRUPT | SA_SHIRQ, "specialix IO8+", bp);
+ else
+ error = request_irq(bp->irq, sx_interrupt, SA_INTERRUPT, "specialix IO8+", bp);
+
+ if (error)
+ return error;
+
+ turn_ints_on (bp);
+ bp->flags |= SX_BOARD_ACTIVE;
+
+ return 0;
+}
+
+
+/* Called with disabled interrupts */
+static inline void sx_shutdown_board(struct specialix_board *bp)
+{
+ func_enter();
+
+ if (!(bp->flags & SX_BOARD_ACTIVE)) {
+ func_exit();
+ return;
+ }
+
+ bp->flags &= ~SX_BOARD_ACTIVE;
+
+ dprintk (SX_DEBUG_IRQ, "Freeing IRQ%d for board %d.\n",
+ bp->irq, board_No (bp));
+ free_irq(bp->irq, bp);
+
+ turn_ints_off (bp);
+
+
+ func_exit();
+}
+
+
+/*
+ * Setting up port characteristics.
+ * Must be called with disabled interrupts
+ */
+static void sx_change_speed(struct specialix_board *bp, struct specialix_port *port)
+{
+ struct tty_struct *tty;
+ unsigned long baud;
+ long tmp;
+ unsigned char cor1 = 0, cor3 = 0;
+ unsigned char mcor1 = 0, mcor2 = 0;
+ static unsigned long again;
+ unsigned long flags;
+
+ func_enter();
+
+ if (!(tty = port->tty) || !tty->termios) {
+ func_exit();
+ return;
+ }
+
+ port->IER = 0;
+ port->COR2 = 0;
+ /* Select port on the board */
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_CAR, port_No(port));
+
+ /* The Specialix board doens't implement the RTS lines.
+ They are used to set the IRQ level. Don't touch them. */
+ if (SX_CRTSCTS(tty))
+ port->MSVR = MSVR_DTR | (sx_in(bp, CD186x_MSVR) & MSVR_RTS);
+ else
+ port->MSVR = (sx_in(bp, CD186x_MSVR) & MSVR_RTS);
+ spin_unlock_irqrestore(&bp->lock, flags);
+ dprintk (SX_DEBUG_TERMIOS, "sx: got MSVR=%02x.\n", port->MSVR);
+ 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;
+ }
+
+
+ if (!baud_table[baud]) {
+ /* Drop DTR & exit */
+ dprintk (SX_DEBUG_TERMIOS, "Dropping DTR... Hmm....\n");
+ if (!SX_CRTSCTS (tty)) {
+ port -> MSVR &= ~ MSVR_DTR;
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_MSVR, port->MSVR );
+ spin_unlock_irqrestore(&bp->lock, flags);
+ }
+ else
+ dprintk (SX_DEBUG_TERMIOS, "Can't drop DTR: no DTR.\n");
+ return;
+ } else {
+ /* Set DTR on */
+ if (!SX_CRTSCTS (tty)) {
+ port ->MSVR |= MSVR_DTR;
+ }
+ }
+
+ /*
+ * Now we must calculate some speed depended things
+ */
+
+ /* Set baud rate for port */
+ tmp = port->custom_divisor ;
+ if ( tmp )
+ printk (KERN_INFO "sx%d: Using custom baud rate divisor %ld. \n"
+ "This is an untested option, please be carefull.\n",
+ port_No (port), tmp);
+ else
+ tmp = (((SX_OSCFREQ + baud_table[baud]/2) / baud_table[baud] +
+ CD186x_TPC/2) / CD186x_TPC);
+
+ if ((tmp < 0x10) && time_before(again, jiffies)) {
+ again = jiffies + HZ * 60;
+ /* Page 48 of version 2.0 of the CL-CD1865 databook */
+ if (tmp >= 12) {
+ printk (KERN_INFO "sx%d: Baud rate divisor is %ld. \n"
+ "Performance degradation is possible.\n"
+ "Read specialix.txt for more info.\n",
+ port_No (port), tmp);
+ } else {
+ printk (KERN_INFO "sx%d: Baud rate divisor is %ld. \n"
+ "Warning: overstressing Cirrus chip. "
+ "This might not work.\n"
+ "Read specialix.txt for more info.\n",
+ port_No (port), tmp);
+ }
+ }
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_RBPRH, (tmp >> 8) & 0xff);
+ sx_out(bp, CD186x_TBPRH, (tmp >> 8) & 0xff);
+ sx_out(bp, CD186x_RBPRL, tmp & 0xff);
+ sx_out(bp, CD186x_TBPRL, tmp & 0xff);
+ spin_unlock_irqrestore(&bp->lock, flags);
+ if (port->custom_divisor) {
+ baud = (SX_OSCFREQ + port->custom_divisor/2) / port->custom_divisor;
+ baud = ( baud + 5 ) / 10;
+ } else
+ 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 - CD186x_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 = (SPECIALIX_TPS + SPECIALIX_TPS/2 + baud/2) / baud;
+ tmp = (tmp > 0xff) ? 0xff : tmp;
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_RTPR, tmp);
+ spin_unlock_irqrestore(&bp->lock, flags);
+ 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 SPECIALIX_BRAIN_DAMAGED_CTS
+ port->IER |= IER_DSR | IER_CTS;
+ mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD;
+ mcor2 |= MCOR2_DSROD | MCOR2_CTSOD;
+ spin_lock_irqsave(&bp->lock, flags);
+ tty->hw_stopped = !(sx_in(bp, CD186x_MSVR) & (MSVR_CTS|MSVR_DSR));
+ spin_unlock_irqrestore(&bp->lock, flags);
+#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 it */
+ if (I_IXON(tty)) {
+ port->COR2 |= COR2_TXIBE;
+ cor3 |= (COR3_FCT | COR3_SCDE);
+ if (I_IXANY(tty))
+ port->COR2 |= COR2_IXM;
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_SCHR1, START_CHAR(tty));
+ sx_out(bp, CD186x_SCHR2, STOP_CHAR(tty));
+ sx_out(bp, CD186x_SCHR3, START_CHAR(tty));
+ sx_out(bp, CD186x_SCHR4, STOP_CHAR(tty));
+ spin_unlock_irqrestore(&bp->lock, flags);
+ }
+ 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 |= sx_rxfifo;
+ /* Setting up CD186x channel registers */
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_COR1, cor1);
+ sx_out(bp, CD186x_COR2, port->COR2);
+ sx_out(bp, CD186x_COR3, cor3);
+ spin_unlock_irqrestore(&bp->lock, flags);
+ /* Make CD186x know about registers change */
+ sx_wait_CCR(bp);
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_CCR, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3);
+ /* Setting up modem option registers */
+ dprintk (SX_DEBUG_TERMIOS, "Mcor1 = %02x, mcor2 = %02x.\n", mcor1, mcor2);
+ sx_out(bp, CD186x_MCOR1, mcor1);
+ sx_out(bp, CD186x_MCOR2, mcor2);
+ spin_unlock_irqrestore(&bp->lock, flags);
+ /* Enable CD186x transmitter & receiver */
+ sx_wait_CCR(bp);
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_CCR, CCR_TXEN | CCR_RXEN);
+ /* Enable interrupts */
+ sx_out(bp, CD186x_IER, port->IER);
+ /* And finally set the modem lines... */
+ sx_out(bp, CD186x_MSVR, port->MSVR);
+ spin_unlock_irqrestore(&bp->lock, flags);
+
+ func_exit();
+}
+
+
+/* Must be called with interrupts enabled */
+static int sx_setup_port(struct specialix_board *bp, struct specialix_port *port)
+{
+ unsigned long flags;
+
+ func_enter();
+
+ if (port->flags & ASYNC_INITIALIZED) {
+ func_exit();
+ return 0;
+ }
+
+ if (!port->xmit_buf) {
+ /* We may sleep in get_zeroed_page() */
+ unsigned long tmp;
+
+ if (!(tmp = get_zeroed_page(GFP_KERNEL))) {
+ func_exit();
+ return -ENOMEM;
+ }
+
+ if (port->xmit_buf) {
+ free_page(tmp);
+ func_exit();
+ return -ERESTARTSYS;
+ }
+ port->xmit_buf = (unsigned char *) tmp;
+ }
+
+ spin_lock_irqsave(&port->lock, flags);
+
+ if (port->tty)
+ clear_bit(TTY_IO_ERROR, &port->tty->flags);
+
+ port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
+ sx_change_speed(bp, port);
+ port->flags |= ASYNC_INITIALIZED;
+
+ spin_unlock_irqrestore(&port->lock, flags);
+
+
+ func_exit();
+ return 0;
+}
+
+
+/* Must be called with interrupts disabled */
+static void sx_shutdown_port(struct specialix_board *bp, struct specialix_port *port)
+{
+ struct tty_struct *tty;
+ int i;
+ unsigned long flags;
+
+ func_enter();
+
+ if (!(port->flags & ASYNC_INITIALIZED)) {
+ func_exit();
+ return;
+ }
+
+ if (sx_debug & SX_DEBUG_FIFO) {
+ dprintk(SX_DEBUG_FIFO, "sx%d: port %d: %ld overruns, FIFO hits [ ",
+ board_No(bp), port_No(port), port->overrun);
+ for (i = 0; i < 10; i++) {
+ dprintk(SX_DEBUG_FIFO, "%ld ", port->hits[i]);
+ }
+ dprintk(SX_DEBUG_FIFO, "].\n");
+ }
+
+ if (port->xmit_buf) {
+ free_page((unsigned long) port->xmit_buf);
+ port->xmit_buf = NULL;
+ }
+
+ /* Select port */
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_CAR, port_No(port));
+
+ if (!(tty = port->tty) || C_HUPCL(tty)) {
+ /* Drop DTR */
+ sx_out(bp, CD186x_MSVDTR, 0);
+ }
+ spin_unlock_irqrestore(&bp->lock, flags);
+ /* Reset port */
+ sx_wait_CCR(bp);
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_CCR, CCR_SOFTRESET);
+ /* Disable all interrupts from this port */
+ port->IER = 0;
+ sx_out(bp, CD186x_IER, port->IER);
+ spin_unlock_irqrestore(&bp->lock, flags);
+ if (tty)
+ set_bit(TTY_IO_ERROR, &tty->flags);
+ port->flags &= ~ASYNC_INITIALIZED;
+
+ if (!bp->count)
+ sx_shutdown_board(bp);
+ func_exit();
+}
+
+
+static int block_til_ready(struct tty_struct *tty, struct file * filp,
+ struct specialix_port *port)
+{
+ DECLARE_WAITQUEUE(wait, current);
+ struct specialix_board *bp = port_Board(port);
+ int retval;
+ int do_clocal = 0;
+ int CD;
+ unsigned long flags;
+
+ func_enter();
+
+ /*
+ * 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) {
+ func_exit();
+ return -EAGAIN;
+ } else {
+ func_exit();
+ 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;
+ func_exit();
+ 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);
+ spin_lock_irqsave(&port->lock, flags);
+ if (!tty_hung_up_p(filp)) {
+ port->count--;
+ }
+ spin_unlock_irqrestore(&port->lock, flags);
+ port->blocked_open++;
+ while (1) {
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_CAR, port_No(port));
+ CD = sx_in(bp, CD186x_MSVR) & MSVR_CD;
+ if (SX_CRTSCTS (tty)) {
+ /* Activate RTS */
+ port->MSVR |= MSVR_DTR; /* WTF? */
+ sx_out (bp, CD186x_MSVR, port->MSVR);
+ } else {
+ /* Activate DTR */
+ port->MSVR |= MSVR_DTR;
+ sx_out (bp, CD186x_MSVR, port->MSVR);
+ }
+ spin_unlock_irqrestore(&bp->lock, flags);
+ 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();
+ }
+
+ set_current_state(TASK_RUNNING);
+ remove_wait_queue(&port->open_wait, &wait);
+ spin_lock_irqsave(&port->lock, flags);
+ if (!tty_hung_up_p(filp)) {
+ port->count++;
+ }
+ port->blocked_open--;
+ spin_unlock_irqrestore(&port->lock, flags);
+ if (retval) {
+ func_exit();
+ return retval;
+ }
+
+ port->flags |= ASYNC_NORMAL_ACTIVE;
+ func_exit();
+ return 0;
+}
+
+
+static int sx_open(struct tty_struct * tty, struct file * filp)
+{
+ int board;
+ int error;
+ struct specialix_port * port;
+ struct specialix_board * bp;
+ int i;
+ unsigned long flags;
+
+ func_enter();
+
+ board = SX_BOARD(tty->index);
+
+ if (board >= SX_NBOARD || !(sx_board[board].flags & SX_BOARD_PRESENT)) {
+ func_exit();
+ return -ENODEV;
+ }
+
+ bp = &sx_board[board];
+ port = sx_port + board * SX_NPORT + SX_PORT(tty->index);
+ port->overrun = 0;
+ for (i = 0; i < 10; i++)
+ port->hits[i]=0;
+
+ dprintk (SX_DEBUG_OPEN, "Board = %d, bp = %p, port = %p, portno = %d.\n",
+ board, bp, port, SX_PORT(tty->index));
+
+ if (sx_paranoia_check(port, tty->name, "sx_open")) {
+ func_enter();
+ return -ENODEV;
+ }
+
+ if ((error = sx_setup_board(bp))) {
+ func_exit();
+ return error;
+ }
+
+ spin_lock_irqsave(&bp->lock, flags);
+ port->count++;
+ bp->count++;
+ tty->driver_data = port;
+ port->tty = tty;
+ spin_unlock_irqrestore(&bp->lock, flags);
+
+ if ((error = sx_setup_port(bp, port))) {
+ func_enter();
+ return error;
+ }
+
+ if ((error = block_til_ready(tty, filp, port))) {
+ func_enter();
+ return error;
+ }
+
+ func_exit();
+ return 0;
+}
+
+
+static void sx_close(struct tty_struct * tty, struct file * filp)
+{
+ struct specialix_port *port = (struct specialix_port *) tty->driver_data;
+ struct specialix_board *bp;
+ unsigned long flags;
+ unsigned long timeout;
+
+ func_enter();
+ if (!port || sx_paranoia_check(port, tty->name, "close")) {
+ func_exit();
+ return;
+ }
+ spin_lock_irqsave(&port->lock, flags);
+
+ if (tty_hung_up_p(filp)) {
+ spin_unlock_irqrestore(&port->lock, flags);
+ func_exit();
+ return;
+ }
+
+ bp = port_Board(port);
+ if ((tty->count == 1) && (port->count != 1)) {
+ printk(KERN_ERR "sx%d: sx_close: bad port count;"
+ " tty->count is 1, port count is %d\n",
+ board_No(bp), port->count);
+ port->count = 1;
+ }
+
+ if (port->count > 1) {
+ port->count--;
+ bp->count--;
+
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ func_exit();
+ return;
+ }
+ 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;
+ spin_unlock_irqrestore(&port->lock, flags);
+ dprintk (SX_DEBUG_OPEN, "Closing\n");
+ 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.
+ */
+ dprintk (SX_DEBUG_OPEN, "Closed\n");
+ port->IER &= ~IER_RXD;
+ if (port->flags & ASYNC_INITIALIZED) {
+ port->IER &= ~IER_TXRDY;
+ port->IER |= IER_TXEMPTY;
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_CAR, port_No(port));
+ sx_out(bp, CD186x_IER, port->IER);
+ spin_unlock_irqrestore(&bp->lock, flags);
+ /*
+ * 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) {
+ set_current_state (TASK_INTERRUPTIBLE);
+ msleep_interruptible(jiffies_to_msecs(port->timeout));
+ if (time_after(jiffies, timeout)) {
+ printk (KERN_INFO "Timeout waiting for close\n");
+ break;
+ }
+ }
+
+ }
+
+ if (--bp->count < 0) {
+ printk(KERN_ERR "sx%d: sx_shutdown_port: bad board count: %d port: %d\n",
+ board_No(bp), bp->count, tty->index);
+ bp->count = 0;
+ }
+ if (--port->count < 0) {
+ printk(KERN_ERR "sx%d: sx_close: bad port count for tty%d: %d\n",
+ board_No(bp), port_No(port), port->count);
+ port->count = 0;
+ }
+
+ sx_shutdown_port(bp, port);
+ if (tty->driver->flush_buffer)
+ tty->driver->flush_buffer(tty);
+ tty_ldisc_flush(tty);
+ spin_lock_irqsave(&port->lock, flags);
+ tty->closing = 0;
+ port->event = 0;
+ port->tty = NULL;
+ spin_unlock_irqrestore(&port->lock, flags);
+ 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);
+
+ func_exit();
+}
+
+
+static int sx_write(struct tty_struct * tty,
+ const unsigned char *buf, int count)
+{
+ struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+ struct specialix_board *bp;
+ int c, total = 0;
+ unsigned long flags;
+
+ func_enter();
+ if (sx_paranoia_check(port, tty->name, "sx_write")) {
+ func_exit();
+ return 0;
+ }
+
+ bp = port_Board(port);
+
+ if (!tty || !port->xmit_buf || !tmp_buf) {
+ func_exit();
+ return 0;
+ }
+
+ while (1) {
+ spin_lock_irqsave(&port->lock, flags);
+ c = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1,
+ SERIAL_XMIT_SIZE - port->xmit_head));
+ if (c <= 0) {
+ spin_unlock_irqrestore(&port->lock, 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;
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ buf += c;
+ count -= c;
+ total += c;
+ }
+
+ spin_lock_irqsave(&bp->lock, flags);
+ if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped &&
+ !(port->IER & IER_TXRDY)) {
+ port->IER |= IER_TXRDY;
+ sx_out(bp, CD186x_CAR, port_No(port));
+ sx_out(bp, CD186x_IER, port->IER);
+ }
+ spin_unlock_irqrestore(&bp->lock, flags);
+ func_exit();
+
+ return total;
+}
+
+
+static void sx_put_char(struct tty_struct * tty, unsigned char ch)
+{
+ struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+ unsigned long flags;
+ struct specialix_board * bp;
+
+ func_enter();
+
+ if (sx_paranoia_check(port, tty->name, "sx_put_char")) {
+ func_exit();
+ return;
+ }
+ dprintk (SX_DEBUG_TX, "check tty: %p %p\n", tty, port->xmit_buf);
+ if (!tty || !port->xmit_buf) {
+ func_exit();
+ return;
+ }
+ bp = port_Board(port);
+ spin_lock_irqsave(&port->lock, flags);
+
+ dprintk (SX_DEBUG_TX, "xmit_cnt: %d xmit_buf: %p\n", port->xmit_cnt, port->xmit_buf);
+ if ((port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) || (!port->xmit_buf)) {
+ spin_unlock_irqrestore(&port->lock, flags);
+ dprintk (SX_DEBUG_TX, "Exit size\n");
+ func_exit();
+ return;
+ }
+ dprintk (SX_DEBUG_TX, "Handle xmit: %p %p\n", port, port->xmit_buf);
+ port->xmit_buf[port->xmit_head++] = ch;
+ port->xmit_head &= SERIAL_XMIT_SIZE - 1;
+ port->xmit_cnt++;
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ func_exit();
+}
+
+
+static void sx_flush_chars(struct tty_struct * tty)
+{
+ struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+ unsigned long flags;
+ struct specialix_board * bp = port_Board(port);
+
+ func_enter();
+
+ if (sx_paranoia_check(port, tty->name, "sx_flush_chars")) {
+ func_exit();
+ return;
+ }
+ if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
+ !port->xmit_buf) {
+ func_exit();
+ return;
+ }
+ spin_lock_irqsave(&bp->lock, flags);
+ port->IER |= IER_TXRDY;
+ sx_out(port_Board(port), CD186x_CAR, port_No(port));
+ sx_out(port_Board(port), CD186x_IER, port->IER);
+ spin_unlock_irqrestore(&bp->lock, flags);
+
+ func_exit();
+}
+
+
+static int sx_write_room(struct tty_struct * tty)
+{
+ struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+ int ret;
+
+ func_enter();
+
+ if (sx_paranoia_check(port, tty->name, "sx_write_room")) {
+ func_exit();
+ return 0;
+ }
+
+ ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1;
+ if (ret < 0)
+ ret = 0;
+
+ func_exit();
+ return ret;
+}
+
+
+static int sx_chars_in_buffer(struct tty_struct *tty)
+{
+ struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+
+ func_enter();
+
+ if (sx_paranoia_check(port, tty->name, "sx_chars_in_buffer")) {
+ func_exit();
+ return 0;
+ }
+ func_exit();
+ return port->xmit_cnt;
+}
+
+
+static void sx_flush_buffer(struct tty_struct *tty)
+{
+ struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+ unsigned long flags;
+ struct specialix_board * bp;
+
+ func_enter();
+
+ if (sx_paranoia_check(port, tty->name, "sx_flush_buffer")) {
+ func_exit();
+ return;
+ }
+
+ bp = port_Board(port);
+ spin_lock_irqsave(&port->lock, flags);
+ port->xmit_cnt = port->xmit_head = port->xmit_tail = 0;
+ spin_unlock_irqrestore(&port->lock, flags);
+ tty_wakeup(tty);
+
+ func_exit();
+}
+
+
+static int sx_tiocmget(struct tty_struct *tty, struct file *file)
+{
+ struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+ struct specialix_board * bp;
+ unsigned char status;
+ unsigned int result;
+ unsigned long flags;
+
+ func_enter();
+
+ if (sx_paranoia_check(port, tty->name, __FUNCTION__)) {
+ func_exit();
+ return -ENODEV;
+ }
+
+ bp = port_Board(port);
+ spin_lock_irqsave (&bp->lock, flags);
+ sx_out(bp, CD186x_CAR, port_No(port));
+ status = sx_in(bp, CD186x_MSVR);
+ spin_unlock_irqrestore(&bp->lock, flags);
+ dprintk (SX_DEBUG_INIT, "Got msvr[%d] = %02x, car = %d.\n",
+ port_No(port), status, sx_in (bp, CD186x_CAR));
+ dprintk (SX_DEBUG_INIT, "sx_port = %p, port = %p\n", sx_port, port);
+ if (SX_CRTSCTS(port->tty)) {
+ result = /* (status & MSVR_RTS) ? */ TIOCM_DTR /* : 0) */
+ | ((status & MSVR_DTR) ? TIOCM_RTS : 0)
+ | ((status & MSVR_CD) ? TIOCM_CAR : 0)
+ |/* ((status & MSVR_DSR) ? */ TIOCM_DSR /* : 0) */
+ | ((status & MSVR_CTS) ? TIOCM_CTS : 0);
+ } else {
+ 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);
+ }
+
+ func_exit();
+
+ return result;
+}
+
+
+static int sx_tiocmset(struct tty_struct *tty, struct file *file,
+ unsigned int set, unsigned int clear)
+{
+ struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+ unsigned long flags;
+ struct specialix_board *bp;
+
+ func_enter();
+
+ if (sx_paranoia_check(port, tty->name, __FUNCTION__)) {
+ func_exit();
+ return -ENODEV;
+ }
+
+ bp = port_Board(port);
+
+ spin_lock_irqsave(&port->lock, flags);
+ /* if (set & TIOCM_RTS)
+ port->MSVR |= MSVR_RTS; */
+ /* if (set & TIOCM_DTR)
+ port->MSVR |= MSVR_DTR; */
+
+ if (SX_CRTSCTS(port->tty)) {
+ if (set & TIOCM_RTS)
+ port->MSVR |= MSVR_DTR;
+ } else {
+ if (set & TIOCM_DTR)
+ port->MSVR |= MSVR_DTR;
+ }
+
+ /* if (clear & TIOCM_RTS)
+ port->MSVR &= ~MSVR_RTS; */
+ /* if (clear & TIOCM_DTR)
+ port->MSVR &= ~MSVR_DTR; */
+ if (SX_CRTSCTS(port->tty)) {
+ if (clear & TIOCM_RTS)
+ port->MSVR &= ~MSVR_DTR;
+ } else {
+ if (clear & TIOCM_DTR)
+ port->MSVR &= ~MSVR_DTR;
+ }
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_CAR, port_No(port));
+ sx_out(bp, CD186x_MSVR, port->MSVR);
+ spin_unlock_irqrestore(&bp->lock, flags);
+ spin_unlock_irqrestore(&port->lock, flags);
+ func_exit();
+ return 0;
+}
+
+
+static inline void sx_send_break(struct specialix_port * port, unsigned long length)
+{
+ struct specialix_board *bp = port_Board(port);
+ unsigned long flags;
+
+ func_enter();
+
+ spin_lock_irqsave (&port->lock, flags);
+ port->break_length = SPECIALIX_TPS / HZ * length;
+ port->COR2 |= COR2_ETC;
+ port->IER |= IER_TXRDY;
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_CAR, port_No(port));
+ sx_out(bp, CD186x_COR2, port->COR2);
+ sx_out(bp, CD186x_IER, port->IER);
+ spin_unlock_irqrestore(&bp->lock, flags);
+ spin_unlock_irqrestore (&port->lock, flags);
+ sx_wait_CCR(bp);
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_CCR, CCR_CORCHG2);
+ spin_unlock_irqrestore(&bp->lock, flags);
+ sx_wait_CCR(bp);
+
+ func_exit();
+}
+
+
+static inline int sx_set_serial_info(struct specialix_port * port,
+ struct serial_struct __user * newinfo)
+{
+ struct serial_struct tmp;
+ struct specialix_board *bp = port_Board(port);
+ int change_speed;
+
+ func_enter();
+ /*
+ error = verify_area(VERIFY_READ, (void *) newinfo, sizeof(tmp));
+ if (error) {
+ func_exit();
+ return error;
+ }
+ */
+ if (copy_from_user(&tmp, newinfo, sizeof(tmp))) {
+ func_enter();
+ return -EFAULT;
+ }
+
+#if 0
+ if ((tmp.irq != bp->irq) ||
+ (tmp.port != bp->base) ||
+ (tmp.type != PORT_CIRRUS) ||
+ (tmp.baud_base != (SX_OSCFREQ + CD186x_TPC/2) / CD186x_TPC) ||
+ (tmp.custom_divisor != 0) ||
+ (tmp.xmit_fifo_size != CD186x_NFIFO) ||
+ (tmp.flags & ~SPECIALIX_LEGAL_FLAGS)) {
+ func_exit();
+ return -EINVAL;
+ }
+#endif
+
+ change_speed = ((port->flags & ASYNC_SPD_MASK) !=
+ (tmp.flags & ASYNC_SPD_MASK));
+ change_speed |= (tmp.custom_divisor != port->custom_divisor);
+
+ 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))) {
+ func_exit();
+ return -EPERM;
+ }
+ port->flags = ((port->flags & ~ASYNC_USR_MASK) |
+ (tmp.flags & ASYNC_USR_MASK));
+ port->custom_divisor = tmp.custom_divisor;
+ } else {
+ port->flags = ((port->flags & ~ASYNC_FLAGS) |
+ (tmp.flags & ASYNC_FLAGS));
+ port->close_delay = tmp.close_delay;
+ port->closing_wait = tmp.closing_wait;
+ port->custom_divisor = tmp.custom_divisor;
+ }
+ if (change_speed) {
+ sx_change_speed(bp, port);
+ }
+ func_exit();
+ return 0;
+}
+
+
+static inline int sx_get_serial_info(struct specialix_port * port,
+ struct serial_struct __user *retinfo)
+{
+ struct serial_struct tmp;
+ struct specialix_board *bp = port_Board(port);
+ // int error;
+
+ func_enter();
+
+ /*
+ 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 - sx_port;
+ tmp.port = bp->base;
+ tmp.irq = bp->irq;
+ tmp.flags = port->flags;
+ tmp.baud_base = (SX_OSCFREQ + CD186x_TPC/2) / CD186x_TPC;
+ tmp.close_delay = port->close_delay * HZ/100;
+ tmp.closing_wait = port->closing_wait * HZ/100;
+ tmp.custom_divisor = port->custom_divisor;
+ tmp.xmit_fifo_size = CD186x_NFIFO;
+ if (copy_to_user(retinfo, &tmp, sizeof(tmp))) {
+ func_exit();
+ return -EFAULT;
+ }
+
+ func_exit();
+ return 0;
+}
+
+
+static int sx_ioctl(struct tty_struct * tty, struct file * filp,
+ unsigned int cmd, unsigned long arg)
+{
+ struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+ int retval;
+ void __user *argp = (void __user *)arg;
+
+ func_enter();
+
+ if (sx_paranoia_check(port, tty->name, "sx_ioctl")) {
+ func_exit();
+ return -ENODEV;
+ }
+
+ switch (cmd) {
+ case TCSBRK: /* SVID version: non-zero arg --> no break */
+ retval = tty_check_change(tty);
+ if (retval) {
+ func_exit();
+ return retval;
+ }
+ tty_wait_until_sent(tty, 0);
+ if (!arg)
+ sx_send_break(port, HZ/4); /* 1/4 second */
+ return 0;
+ case TCSBRKP: /* support for POSIX tcsendbreak() */
+ retval = tty_check_change(tty);
+ if (retval) {
+ func_exit();
+ return retval;
+ }
+ tty_wait_until_sent(tty, 0);
+ sx_send_break(port, arg ? arg*(HZ/10) : HZ/4);
+ func_exit();
+ return 0;
+ case TIOCGSOFTCAR:
+ if (put_user(C_CLOCAL(tty)?1:0, (unsigned long __user *)argp)) {
+ func_exit();
+ return -EFAULT;
+ }
+ func_exit();
+ return 0;
+ case TIOCSSOFTCAR:
+ if (get_user(arg, (unsigned long __user *) argp)) {
+ func_exit();
+ return -EFAULT;
+ }
+ tty->termios->c_cflag =
+ ((tty->termios->c_cflag & ~CLOCAL) |
+ (arg ? CLOCAL : 0));
+ func_exit();
+ return 0;
+ case TIOCGSERIAL:
+ func_exit();
+ return sx_get_serial_info(port, argp);
+ case TIOCSSERIAL:
+ func_exit();
+ return sx_set_serial_info(port, argp);
+ default:
+ func_exit();
+ return -ENOIOCTLCMD;
+ }
+ func_exit();
+ return 0;
+}
+
+
+static void sx_throttle(struct tty_struct * tty)
+{
+ struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+ struct specialix_board *bp;
+ unsigned long flags;
+
+ func_enter();
+
+ if (sx_paranoia_check(port, tty->name, "sx_throttle")) {
+ func_exit();
+ return;
+ }
+
+ bp = port_Board(port);
+
+ /* Use DTR instead of RTS ! */
+ if (SX_CRTSCTS (tty))
+ port->MSVR &= ~MSVR_DTR;
+ else {
+ /* Auch!!! I think the system shouldn't call this then. */
+ /* Or maybe we're supposed (allowed?) to do our side of hw
+ handshake anyway, even when hardware handshake is off.
+ When you see this in your logs, please report.... */
+ printk (KERN_ERR "sx%d: Need to throttle, but can't (hardware hs is off)\n",
+ port_No (port));
+ }
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_CAR, port_No(port));
+ spin_unlock_irqrestore(&bp->lock, flags);
+ if (I_IXOFF(tty)) {
+ spin_unlock_irqrestore(&bp->lock, flags);
+ sx_wait_CCR(bp);
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_CCR, CCR_SSCH2);
+ spin_unlock_irqrestore(&bp->lock, flags);
+ sx_wait_CCR(bp);
+ }
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_MSVR, port->MSVR);
+ spin_unlock_irqrestore(&bp->lock, flags);
+
+ func_exit();
+}
+
+
+static void sx_unthrottle(struct tty_struct * tty)
+{
+ struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+ struct specialix_board *bp;
+ unsigned long flags;
+
+ func_enter();
+
+ if (sx_paranoia_check(port, tty->name, "sx_unthrottle")) {
+ func_exit();
+ return;
+ }
+
+ bp = port_Board(port);
+
+ spin_lock_irqsave(&port->lock, flags);
+ /* XXXX Use DTR INSTEAD???? */
+ if (SX_CRTSCTS(tty)) {
+ port->MSVR |= MSVR_DTR;
+ } /* Else clause: see remark in "sx_throttle"... */
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_CAR, port_No(port));
+ spin_unlock_irqrestore(&bp->lock, flags);
+ if (I_IXOFF(tty)) {
+ spin_unlock_irqrestore(&port->lock, flags);
+ sx_wait_CCR(bp);
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_CCR, CCR_SSCH1);
+ spin_unlock_irqrestore(&bp->lock, flags);
+ sx_wait_CCR(bp);
+ spin_lock_irqsave(&port->lock, flags);
+ }
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_MSVR, port->MSVR);
+ spin_unlock_irqrestore(&bp->lock, flags);
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ func_exit();
+}
+
+
+static void sx_stop(struct tty_struct * tty)
+{
+ struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+ struct specialix_board *bp;
+ unsigned long flags;
+
+ func_enter();
+
+ if (sx_paranoia_check(port, tty->name, "sx_stop")) {
+ func_exit();
+ return;
+ }
+
+ bp = port_Board(port);
+
+ spin_lock_irqsave(&port->lock, flags);
+ port->IER &= ~IER_TXRDY;
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_CAR, port_No(port));
+ sx_out(bp, CD186x_IER, port->IER);
+ spin_unlock_irqrestore(&bp->lock, flags);
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ func_exit();
+}
+
+
+static void sx_start(struct tty_struct * tty)
+{
+ struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+ struct specialix_board *bp;
+ unsigned long flags;
+
+ func_enter();
+
+ if (sx_paranoia_check(port, tty->name, "sx_start")) {
+ func_exit();
+ return;
+ }
+
+ bp = port_Board(port);
+
+ spin_lock_irqsave(&port->lock, flags);
+ if (port->xmit_cnt && port->xmit_buf && !(port->IER & IER_TXRDY)) {
+ port->IER |= IER_TXRDY;
+ spin_lock_irqsave(&bp->lock, flags);
+ sx_out(bp, CD186x_CAR, port_No(port));
+ sx_out(bp, CD186x_IER, port->IER);
+ spin_unlock_irqrestore(&bp->lock, flags);
+ }
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ func_exit();
+}
+
+
+/*
+ * 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_sx_hangup() -> tty->hangup() -> sx_hangup()
+ *
+ */
+static void do_sx_hangup(void *private_)
+{
+ struct specialix_port *port = (struct specialix_port *) private_;
+ struct tty_struct *tty;
+
+ func_enter();
+
+ tty = port->tty;
+ if (tty)
+ tty_hangup(tty); /* FIXME: module removal race here */
+
+ func_exit();
+}
+
+
+static void sx_hangup(struct tty_struct * tty)
+{
+ struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+ struct specialix_board *bp;
+ unsigned long flags;
+
+ func_enter();
+
+ if (sx_paranoia_check(port, tty->name, "sx_hangup")) {
+ func_exit();
+ return;
+ }
+
+ bp = port_Board(port);
+
+ sx_shutdown_port(bp, port);
+ spin_lock_irqsave(&port->lock, flags);
+ port->event = 0;
+ bp->count -= port->count;
+ if (bp->count < 0) {
+ printk(KERN_ERR "sx%d: sx_hangup: bad board count: %d port: %d\n",
+ board_No(bp), bp->count, tty->index);
+ bp->count = 0;
+ }
+ port->count = 0;
+ port->flags &= ~ASYNC_NORMAL_ACTIVE;
+ port->tty = NULL;
+ spin_unlock_irqrestore(&port->lock, flags);
+ wake_up_interruptible(&port->open_wait);
+
+ func_exit();
+}
+
+
+static void sx_set_termios(struct tty_struct * tty, struct termios * old_termios)
+{
+ struct specialix_port *port = (struct specialix_port *)tty->driver_data;
+ unsigned long flags;
+ struct specialix_board * bp;
+
+ if (sx_paranoia_check(port, tty->name, "sx_set_termios"))
+ return;
+
+ if (tty->termios->c_cflag == old_termios->c_cflag &&
+ tty->termios->c_iflag == old_termios->c_iflag)
+ return;
+
+ bp = port_Board(port);
+ spin_lock_irqsave(&port->lock, flags);
+ sx_change_speed(port_Board(port), port);
+ spin_unlock_irqrestore(&port->lock, flags);
+
+ if ((old_termios->c_cflag & CRTSCTS) &&
+ !(tty->termios->c_cflag & CRTSCTS)) {
+ tty->hw_stopped = 0;
+ sx_start(tty);
+ }
+}
+
+
+static void do_softint(void *private_)
+{
+ struct specialix_port *port = (struct specialix_port *) private_;
+ struct tty_struct *tty;
+
+ func_enter();
+
+ if(!(tty = port->tty)) {
+ func_exit();
+ return;
+ }
+
+ if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event)) {
+ tty_wakeup(tty);
+ //wake_up_interruptible(&tty->write_wait);
+ }
+
+ func_exit();
+}
+
+static struct tty_operations sx_ops = {
+ .open = sx_open,
+ .close = sx_close,
+ .write = sx_write,
+ .put_char = sx_put_char,
+ .flush_chars = sx_flush_chars,
+ .write_room = sx_write_room,
+ .chars_in_buffer = sx_chars_in_buffer,
+ .flush_buffer = sx_flush_buffer,
+ .ioctl = sx_ioctl,
+ .throttle = sx_throttle,
+ .unthrottle = sx_unthrottle,
+ .set_termios = sx_set_termios,
+ .stop = sx_stop,
+ .start = sx_start,
+ .hangup = sx_hangup,
+ .tiocmget = sx_tiocmget,
+ .tiocmset = sx_tiocmset,
+};
+
+static int sx_init_drivers(void)
+{
+ int error;
+ int i;
+
+ func_enter();
+
+ specialix_driver = alloc_tty_driver(SX_NBOARD * SX_NPORT);
+ if (!specialix_driver) {
+ printk(KERN_ERR "sx: Couldn't allocate tty_driver.\n");
+ func_exit();
+ return 1;
+ }
+
+ if (!(tmp_buf = (unsigned char *) get_zeroed_page(GFP_KERNEL))) {
+ printk(KERN_ERR "sx: Couldn't get free page.\n");
+ put_tty_driver(specialix_driver);
+ func_exit();
+ return 1;
+ }
+ specialix_driver->owner = THIS_MODULE;
+ specialix_driver->name = "ttyW";
+ specialix_driver->major = SPECIALIX_NORMAL_MAJOR;
+ specialix_driver->type = TTY_DRIVER_TYPE_SERIAL;
+ specialix_driver->subtype = SERIAL_TYPE_NORMAL;
+ specialix_driver->init_termios = tty_std_termios;
+ specialix_driver->init_termios.c_cflag =
+ B9600 | CS8 | CREAD | HUPCL | CLOCAL;
+ specialix_driver->flags = TTY_DRIVER_REAL_RAW;
+ tty_set_operations(specialix_driver, &sx_ops);
+
+ if ((error = tty_register_driver(specialix_driver))) {
+ put_tty_driver(specialix_driver);
+ free_page((unsigned long)tmp_buf);
+ printk(KERN_ERR "sx: Couldn't register specialix IO8+ driver, error = %d\n",
+ error);
+ func_exit();
+ return 1;
+ }
+ memset(sx_port, 0, sizeof(sx_port));
+ for (i = 0; i < SX_NPORT * SX_NBOARD; i++) {
+ sx_port[i].magic = SPECIALIX_MAGIC;
+ INIT_WORK(&sx_port[i].tqueue, do_softint, &sx_port[i]);
+ INIT_WORK(&sx_port[i].tqueue_hangup, do_sx_hangup, &sx_port[i]);
+ sx_port[i].close_delay = 50 * HZ/100;
+ sx_port[i].closing_wait = 3000 * HZ/100;
+ init_waitqueue_head(&sx_port[i].open_wait);
+ init_waitqueue_head(&sx_port[i].close_wait);
+ spin_lock_init(&sx_port[i].lock);
+ }
+
+ func_exit();
+ return 0;
+}
+
+static void sx_release_drivers(void)
+{
+ func_enter();
+
+ free_page((unsigned long)tmp_buf);
+ tty_unregister_driver(specialix_driver);
+ put_tty_driver(specialix_driver);
+ func_exit();
+}
+
+/*
+ * This routine must be called by kernel at boot time
+ */
+static int __init specialix_init(void)
+{
+ int i;
+ int found = 0;
+
+ func_enter();
+
+ printk(KERN_INFO "sx: Specialix IO8+ driver v" VERSION ", (c) R.E.Wolff 1997/1998.\n");
+ printk(KERN_INFO "sx: derived from work (c) D.Gorodchanin 1994-1996.\n");
+#ifdef CONFIG_SPECIALIX_RTSCTS
+ printk (KERN_INFO "sx: DTR/RTS pin is always RTS.\n");
+#else
+ printk (KERN_INFO "sx: DTR/RTS pin is RTS when CRTSCTS is on.\n");
+#endif
+
+ for (i = 0; i < SX_NBOARD; i++)
+ sx_board[i].lock = SPIN_LOCK_UNLOCKED;
+
+ if (sx_init_drivers()) {
+ func_exit();
+ return -EIO;
+ }
+
+ for (i = 0; i < SX_NBOARD; i++)
+ if (sx_board[i].base && !sx_probe(&sx_board[i]))
+ found++;
+
+#ifdef CONFIG_PCI
+ {
+ struct pci_dev *pdev = NULL;
+
+ i=0;
+ while (i < SX_NBOARD) {
+ if (sx_board[i].flags & SX_BOARD_PRESENT) {
+ i++;
+ continue;
+ }
+ pdev = pci_find_device (PCI_VENDOR_ID_SPECIALIX,
+ PCI_DEVICE_ID_SPECIALIX_IO8,
+ pdev);
+ if (!pdev) break;
+
+ if (pci_enable_device(pdev))
+ continue;
+
+ sx_board[i].irq = pdev->irq;
+
+ sx_board[i].base = pci_resource_start (pdev, 2);
+
+ sx_board[i].flags |= SX_BOARD_IS_PCI;
+ if (!sx_probe(&sx_board[i]))
+ found ++;
+ }
+ }
+#endif
+
+ if (!found) {
+ sx_release_drivers();
+ printk(KERN_INFO "sx: No specialix IO8+ boards detected.\n");
+ func_exit();
+ return -EIO;
+ }
+
+ func_exit();
+ return 0;
+}
+
+static int iobase[SX_NBOARD] = {0,};
+
+static int irq [SX_NBOARD] = {0,};
+
+module_param_array(iobase, int, NULL, 0);
+module_param_array(irq, int, NULL, 0);
+module_param(sx_debug, int, 0);
+module_param(sx_rxfifo, int, 0);
+#ifdef SPECIALIX_TIMER
+module_param(sx_poll, int, 0);
+#endif
+
+/*
+ * You can setup up to 4 boards.
+ * by specifying "iobase=0xXXX,0xXXX ..." as insmod parameter.
+ * You should specify the IRQs too in that case "irq=....,...".
+ *
+ * More than 4 boards in one computer is not possible, as the card can
+ * only use 4 different interrupts.
+ *
+ */
+static int __init specialix_init_module(void)
+{
+ int i;
+
+ func_enter();
+
+ init_MUTEX(&tmp_buf_sem); /* Init de the semaphore - pvdl */
+
+ if (iobase[0] || iobase[1] || iobase[2] || iobase[3]) {
+ for(i = 0; i < SX_NBOARD; i++) {
+ sx_board[i].base = iobase[i];
+ sx_board[i].irq = irq[i];
+ sx_board[i].count= 0;
+ }
+ }
+
+ func_exit();
+
+ return specialix_init();
+}
+
+static void __exit specialix_exit_module(void)
+{
+ int i;
+
+ func_enter();
+
+ sx_release_drivers();
+ for (i = 0; i < SX_NBOARD; i++)
+ if (sx_board[i].flags & SX_BOARD_PRESENT)
+ sx_release_io_range(&sx_board[i]);
+#ifdef SPECIALIX_TIMER
+ del_timer (&missed_irq_timer);
+#endif
+
+ func_exit();
+}
+
+module_init(specialix_init_module);
+module_exit(specialix_exit_module);
+
+MODULE_LICENSE("GPL");