tty: esp: remove broken driver
Alan Cox [Fri, 9 Oct 2009 11:56:41 +0000 (12:56 +0100)]
The ESP driver has been marked broken for years. It's an old ISA device
that clearly nobody cares about any more. Remove it

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

Documentation/serial/hayes-esp.txt [deleted file]
drivers/char/Kconfig
drivers/char/Makefile
drivers/char/esp.c [deleted file]
include/linux/Kbuild
include/linux/hayesesp.h [deleted file]

diff --git a/Documentation/serial/hayes-esp.txt b/Documentation/serial/hayes-esp.txt
deleted file mode 100644 (file)
index 09b5d58..0000000
+++ /dev/null
@@ -1,154 +0,0 @@
-HAYES ESP DRIVER VERSION 2.1
-
-A big thanks to the people at Hayes, especially Alan Adamson.  Their support
-has enabled me to provide enhancements to the driver.
-
-Please report your experiences with this driver to me (arobinso@nyx.net).  I
-am looking for both positive and negative feedback.
-
-*** IMPORTANT CHANGES FOR 2.1 ***
-Support for PIO mode.  Five situations will cause PIO mode to be used:
-1) A multiport card is detected.  PIO mode will always be used.  (8 port cards
-do not support DMA).
-2) The DMA channel is set to an invalid value (anything other than 1 or 3).
-3) The DMA buffer/channel could not be allocated.  The port will revert to PIO
-mode until it is reopened.
-4) Less than a specified number of bytes need to be transferred to/from the
-FIFOs.  PIO mode will be used for that transfer only.
-5) A port needs to do a DMA transfer and another port is already using the
-DMA channel.  PIO mode will be used for that transfer only.
-
-Since the Hayes ESP seems to conflict with other cards (notably sound cards)
-when using DMA, DMA is turned off by default.  To use DMA, it must be turned
-on explicitly, either with the "dma=" option described below or with
-setserial.  A multiport card can be forced into DMA mode by using setserial;
-however, most multiport cards don't support DMA.
-
-The latest version of setserial allows the enhanced configuration of the ESP
-card to be viewed and modified.
-***
-
-This package contains the files needed to compile a module to support the Hayes
-ESP card.  The drivers are basically a modified version of the serial drivers.
-
-Features:
-
-- Uses the enhanced mode of the ESP card, allowing a wider range of
-  interrupts and features than compatibility mode
-- Uses DMA and 16 bit PIO mode to transfer data to and from the ESP's FIFOs,
-  reducing CPU load
-- Supports primary and secondary ports
-
-
-If the driver is compiled as a module, the IRQs to use can be specified by
-using the irq= option.  The format is:
-
-irq=[0x100],[0x140],[0x180],[0x200],[0x240],[0x280],[0x300],[0x380]
-
-The address in brackets is the base address of the card.  The IRQ of
-nonexistent cards can be set to 0.  If an IRQ of a card that does exist is set
-to 0, the driver will attempt to guess at the correct IRQ.  For example, to set
-the IRQ of the card at address 0x300 to 12, the insmod command would be:
-
-insmod esp irq=0,0,0,0,0,0,12,0
-
-The custom divisor can be set by using the divisor= option.  The format is the
-same as for the irq= option.  Each divisor value is a series of hex digits,
-with each digit representing the divisor to use for a corresponding port.  The
-divisor value is constructed RIGHT TO LEFT.  Specifying a nonzero divisor value
-will automatically set the spd_cust flag.  To calculate the divisor to use for
-a certain baud rate, divide the port's base baud (generally 921600) by the
-desired rate.  For example, to set the divisor of the primary port at 0x300 to
-4 and the divisor of the secondary port at 0x308 to 8, the insmod command would
-be:
-
-insmod esp divisor=0,0,0,0,0,0,0x84,0
-
-The dma= option can be used to set the DMA channel.  The channel can be either
-1 or 3.  Specifying any other value will force the driver to use PIO mode.
-For example, to set the DMA channel to 3, the insmod command would be:
-
-insmod esp dma=3
-
-The rx_trigger= and tx_trigger= options can be used to set the FIFO trigger
-levels.  They specify when the ESP card should send an interrupt.  Larger
-values will decrease the number of interrupts; however, a value too high may
-result in data loss.  Valid values are 1 through 1023, with 768 being the
-default.  For example, to set the receive trigger level to 512 bytes and the
-transmit trigger level to 700 bytes, the insmod command would be:
-
-insmod esp rx_trigger=512 tx_trigger=700
-
-The flow_off= and flow_on= options can be used to set the hardware flow off/
-flow on levels.  The flow on level must be lower than the flow off level, and
-the flow off level should be higher than rx_trigger.  Valid values are 1
-through 1023, with 1016 being the default flow off level and 944 being the
-default flow on level.  For example, to set the flow off level to 1000 bytes
-and the flow on level to 935 bytes, the insmod command would be:
-
-insmod esp flow_off=1000 flow_on=935
-
-The rx_timeout= option can be used to set the receive timeout value.  This
-value indicates how long after receiving the last character that the ESP card
-should wait before signalling an interrupt.  Valid values are 0 though 255,
-with 128 being the default.  A value too high will increase latency, and a
-value too low will cause unnecessary interrupts.  For example, to set the
-receive timeout to 255, the insmod command would be:
-
-insmod esp rx_timeout=255
-
-The pio_threshold= option sets the threshold (in number of characters) for
-using PIO mode instead of DMA mode.  For example, if this value is 32,
-transfers of 32 bytes or less will always use PIO mode.
-
-insmod esp pio_threshold=32
-
-Multiple options can be listed on the insmod command line by separating each
-option with a space.  For example:
-
-insmod esp dma=3 trigger=512
-
-The esp module can be automatically loaded when needed.  To cause this to
-happen, add the following lines to /etc/modprobe.conf (replacing the last line
-with options for your configuration):
-
-alias char-major-57 esp
-alias char-major-58 esp
-options esp irq=0,0,0,0,0,0,3,0 divisor=0,0,0,0,0,0,0x4,0
-
-You may also need to run 'depmod -a'.
-
-Devices must be created manually.  To create the devices, note the output from
-the module after it is inserted.  The output will appear in the location where
-kernel messages usually appear (usually /var/adm/messages).  Create two devices
-for each 'tty' mentioned, one with major of 57 and the other with major of 58.
-The minor number should be the same as the tty number reported.  The commands
-would be (replace ? with the tty number):
-
-mknod /dev/ttyP? c 57 ?
-mknod /dev/cup? c 58 ?
-
-For example, if the following line appears:
-
-Oct 24 18:17:23 techno kernel: ttyP8 at 0x0140 (irq = 3) is an ESP primary port
-
-...two devices should be created:
-
-mknod /dev/ttyP8 c 57 8
-mknod /dev/cup8 c 58 8
-
-You may need to set the permissions on the devices:
-
-chmod 666 /dev/ttyP*
-chmod 666 /dev/cup*
-
-The ESP module and the serial module should not conflict (they can be used at
-the same time).  After the ESP module has been loaded the ports on the ESP card
-will no longer be accessible by the serial driver.
-
-If I/O errors are experienced when accessing the port, check for IRQ and DMA
-conflicts ('cat /proc/interrupts' and 'cat /proc/dma' for a list of IRQs and
-DMAs currently in use).
-
-Enjoy!
-Andrew J. Robinson <arobinso@nyx.net>
index 6aad99e..6f31c94 100644 (file)
@@ -201,19 +201,6 @@ config DIGIEPCA
          To compile this driver as a module, choose M here: the
          module will be called epca.
 
-config ESPSERIAL
-       tristate "Hayes ESP serial port support"
-       depends on SERIAL_NONSTANDARD && ISA && ISA_DMA_API && BROKEN
-       help
-         This is a driver which supports Hayes ESP serial ports.  Both single
-         port cards and multiport cards are supported.  Make sure to read
-         <file:Documentation/hayes-esp.txt>.
-
-         To compile this driver as a module, choose M here: the
-         module will be called esp.
-
-         If unsure, say N.
-
 config MOXA_INTELLIO
        tristate "Moxa Intellio support"
        depends on SERIAL_NONSTANDARD && (ISA || EISA || PCI)
index 19a79dd..f957edf 100644 (file)
@@ -18,7 +18,6 @@ obj-$(CONFIG_CONSOLE_TRANSLATIONS) += consolemap.o consolemap_deftbl.o
 obj-$(CONFIG_HW_CONSOLE)       += vt.o defkeymap.o
 obj-$(CONFIG_AUDIT)            += tty_audit.o
 obj-$(CONFIG_MAGIC_SYSRQ)      += sysrq.o
-obj-$(CONFIG_ESPSERIAL)                += esp.o
 obj-$(CONFIG_MVME147_SCC)      += generic_serial.o vme_scc.o
 obj-$(CONFIG_MVME162_SCC)      += generic_serial.o vme_scc.o
 obj-$(CONFIG_BVME6000_SCC)     += generic_serial.o vme_scc.o
diff --git a/drivers/char/esp.c b/drivers/char/esp.c
deleted file mode 100644 (file)
index b19d43c..0000000
+++ /dev/null
@@ -1,2533 +0,0 @@
-/*
- *  esp.c - driver for Hayes ESP serial cards
- *
- *  --- Notices from serial.c, upon which this driver is based ---
- *
- *  Copyright (C) 1991, 1992  Linus Torvalds
- *
- *  Extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92.  Now
- *  much more extensible to support other serial cards based on the
- *  16450/16550A UART's.  Added support for the AST FourPort and the
- *  Accent Async board.
- *
- *  set_serial_info fixed to set the flags, custom divisor, and uart
- *     type fields.  Fix suggested by Michael K. Johnson 12/12/92.
- *
- *  11/95: TIOCMIWAIT, TIOCGICOUNT by Angelo Haritsis <ah@doc.ic.ac.uk>
- *
- *  03/96: Modularised by Angelo Haritsis <ah@doc.ic.ac.uk>
- *
- *  rs_set_termios fixed to look also for changes of the input
- *      flags INPCK, BRKINT, PARMRK, IGNPAR and IGNBRK.
- *                                            Bernd Anhäupl 05/17/96.
- *
- * --- End of notices from serial.c ---
- *
- * Support for the ESP serial card by Andrew J. Robinson
- *     <arobinso@nyx.net> (Card detection routine taken from a patch
- *     by Dennis J. Boylan).  Patches to allow use with 2.1.x contributed
- *     by Chris Faylor.
- *
- * Most recent changes: (Andrew J. Robinson)
- *   Support for PIO mode.  This allows the driver to work properly with
- *     multiport cards.
- *
- * Arnaldo Carvalho de Melo <acme@conectiva.com.br> -
- * several cleanups, use module_init/module_exit, etc
- *
- * This module exports the following rs232 io functions:
- *
- *     int espserial_init(void);
- */
-
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/interrupt.h>
-#include <linux/tty.h>
-#include <linux/tty_flip.h>
-#include <linux/serial.h>
-#include <linux/serialP.h>
-#include <linux/serial_reg.h>
-#include <linux/major.h>
-#include <linux/string.h>
-#include <linux/fcntl.h>
-#include <linux/ptrace.h>
-#include <linux/ioport.h>
-#include <linux/mm.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/bitops.h>
-
-#include <asm/system.h>
-#include <linux/io.h>
-
-#include <asm/dma.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-
-#include <linux/hayesesp.h>
-
-#define NR_PORTS 64    /* maximum number of ports */
-#define NR_PRIMARY 8   /* maximum number of primary ports */
-#define REGION_SIZE 8   /* size of io region to request */
-
-/* The following variables can be set by giving module options */
-static int irq[NR_PRIMARY];    /* IRQ for each base port */
-static unsigned int divisor[NR_PRIMARY]; /* custom divisor for each port */
-static unsigned int dma = ESP_DMA_CHANNEL; /* DMA channel */
-static unsigned int rx_trigger = ESP_RX_TRIGGER;
-static unsigned int tx_trigger = ESP_TX_TRIGGER;
-static unsigned int flow_off = ESP_FLOW_OFF;
-static unsigned int flow_on = ESP_FLOW_ON;
-static unsigned int rx_timeout = ESP_RX_TMOUT;
-static unsigned int pio_threshold = ESP_PIO_THRESHOLD;
-
-MODULE_LICENSE("GPL");
-
-module_param_array(irq, int, NULL, 0);
-module_param_array(divisor, uint, NULL, 0);
-module_param(dma, uint, 0);
-module_param(rx_trigger, uint, 0);
-module_param(tx_trigger, uint, 0);
-module_param(flow_off, uint, 0);
-module_param(flow_on, uint, 0);
-module_param(rx_timeout, uint, 0);
-module_param(pio_threshold, uint, 0);
-
-/* END */
-
-static char *dma_buffer;
-static int dma_bytes;
-static struct esp_pio_buffer *free_pio_buf;
-
-#define DMA_BUFFER_SZ 1024
-
-#define WAKEUP_CHARS 1024
-
-static char serial_name[] __initdata = "ESP serial driver";
-static char serial_version[] __initdata = "2.2";
-
-static struct tty_driver *esp_driver;
-
-/*
- * Serial driver configuration section.  Here are the various options:
- *
- * SERIAL_PARANOIA_CHECK
- *             Check the magic number for the esp_structure where
- *             ever possible.
- */
-
-#undef SERIAL_PARANOIA_CHECK
-#define SERIAL_DO_RESTART
-
-#undef SERIAL_DEBUG_INTR
-#undef SERIAL_DEBUG_OPEN
-#undef SERIAL_DEBUG_FLOW
-
-#if defined(MODULE) && defined(SERIAL_DEBUG_MCOUNT)
-#define DBG_CNT(s) printk(KERN_DEBUG "(%s): [%x] refc=%d, serc=%d, ttyc=%d -> %s\n", \
-                               tty->name, info->port.flags, \
-                               serial_driver.refcount, \
-                               info->port.count, tty->count, s)
-#else
-#define DBG_CNT(s)
-#endif
-
-static struct esp_struct *ports;
-
-static void change_speed(struct esp_struct *info);
-static void rs_wait_until_sent(struct tty_struct *, int);
-
-/*
- * The ESP card has a clock rate of 14.7456 MHz (that is, 2**ESPC_SCALE
- * times the normal 1.8432 Mhz clock of most serial boards).
- */
-#define BASE_BAUD ((1843200 / 16) * (1 << ESPC_SCALE))
-
-/* Standard COM flags (except for COM4, because of the 8514 problem) */
-#define STD_COM_FLAGS (ASYNC_BOOT_AUTOCONF | ASYNC_SKIP_TEST)
-
-static inline int serial_paranoia_check(struct esp_struct *info,
-                                       char *name, const char *routine)
-{
-#ifdef SERIAL_PARANOIA_CHECK
-       static const char badmagic[] = KERN_WARNING
-               "Warning: bad magic number for serial struct (%s) in %s\n";
-       static const char badinfo[] = KERN_WARNING
-               "Warning: null esp_struct for (%s) in %s\n";
-
-       if (!info) {
-               printk(badinfo, name, routine);
-               return 1;
-       }
-       if (info->magic != ESP_MAGIC) {
-               printk(badmagic, name, routine);
-               return 1;
-       }
-#endif
-       return 0;
-}
-
-static inline unsigned int serial_in(struct esp_struct *info, int offset)
-{
-       return inb(info->io_port + offset);
-}
-
-static inline void serial_out(struct esp_struct *info, int offset,
-                             unsigned char value)
-{
-       outb(value, info->io_port+offset);
-}
-
-/*
- * ------------------------------------------------------------
- * rs_stop() and rs_start()
- *
- * This routines are called before setting or resetting tty->stopped.
- * They enable or disable transmitter interrupts, as necessary.
- * ------------------------------------------------------------
- */
-static void rs_stop(struct tty_struct *tty)
-{
-       struct esp_struct *info = tty->driver_data;
-       unsigned long flags;
-
-       if (serial_paranoia_check(info, tty->name, "rs_stop"))
-               return;
-
-       spin_lock_irqsave(&info->lock, flags);
-       if (info->IER & UART_IER_THRI) {
-               info->IER &= ~UART_IER_THRI;
-               serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
-               serial_out(info, UART_ESI_CMD2, info->IER);
-       }
-       spin_unlock_irqrestore(&info->lock, flags);
-}
-
-static void rs_start(struct tty_struct *tty)
-{
-       struct esp_struct *info = tty->driver_data;
-       unsigned long flags;
-
-       if (serial_paranoia_check(info, tty->name, "rs_start"))
-               return;
-
-       spin_lock_irqsave(&info->lock, flags);
-       if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
-               info->IER |= UART_IER_THRI;
-               serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
-               serial_out(info, UART_ESI_CMD2, info->IER);
-       }
-       spin_unlock_irqrestore(&info->lock, flags);
-}
-
-/*
- * ----------------------------------------------------------------------
- *
- * Here starts the interrupt handling routines.  All of the following
- * subroutines are declared as inline and are folded into
- * rs_interrupt().  They were separated out for readability's sake.
- *
- * Note: rs_interrupt() is a "fast" interrupt, which means that it
- * runs with interrupts turned off.  People who may want to modify
- * rs_interrupt() should try to keep the interrupt handler as fast as
- * possible.  After you are done making modifications, it is not a bad
- * idea to do:
- *
- * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
- *
- * and look at the resulting assemble code in serial.s.
- *
- *                             - Ted Ts'o (tytso@mit.edu), 7-Mar-93
- * -----------------------------------------------------------------------
- */
-
-static DEFINE_SPINLOCK(pio_lock);
-
-static inline struct esp_pio_buffer *get_pio_buffer(void)
-{
-       struct esp_pio_buffer *buf;
-       unsigned long flags;
-
-       spin_lock_irqsave(&pio_lock, flags);
-       if (free_pio_buf) {
-               buf = free_pio_buf;
-               free_pio_buf = buf->next;
-       } else {
-               buf = kmalloc(sizeof(struct esp_pio_buffer), GFP_ATOMIC);
-       }
-       spin_unlock_irqrestore(&pio_lock, flags);
-       return buf;
-}
-
-static inline void release_pio_buffer(struct esp_pio_buffer *buf)
-{
-       unsigned long flags;
-       spin_lock_irqsave(&pio_lock, flags);
-       buf->next = free_pio_buf;
-       free_pio_buf = buf;
-       spin_unlock_irqrestore(&pio_lock, flags);
-}
-
-static inline void receive_chars_pio(struct esp_struct *info, int num_bytes)
-{
-       struct tty_struct *tty = info->port.tty;
-       int i;
-       struct esp_pio_buffer *pio_buf;
-       struct esp_pio_buffer *err_buf;
-       unsigned char status_mask;
-
-       pio_buf = get_pio_buffer();
-
-       if (!pio_buf)
-               return;
-
-       err_buf = get_pio_buffer();
-
-       if (!err_buf) {
-               release_pio_buffer(pio_buf);
-               return;
-       }
-
-       status_mask = (info->read_status_mask >> 2) & 0x07;
-
-       for (i = 0; i < num_bytes - 1; i += 2) {
-               *((unsigned short *)(pio_buf->data + i)) =
-                       inw(info->io_port + UART_ESI_RX);
-               err_buf->data[i] = serial_in(info, UART_ESI_RWS);
-               err_buf->data[i + 1] = (err_buf->data[i] >> 3) & status_mask;
-               err_buf->data[i] &= status_mask;
-       }
-
-       if (num_bytes & 0x0001) {
-               pio_buf->data[num_bytes - 1] = serial_in(info, UART_ESI_RX);
-               err_buf->data[num_bytes - 1] =
-                       (serial_in(info, UART_ESI_RWS) >> 3) & status_mask;
-       }
-
-       /* make sure everything is still ok since interrupts were enabled */
-       tty = info->port.tty;
-
-       if (!tty) {
-               release_pio_buffer(pio_buf);
-               release_pio_buffer(err_buf);
-               info->stat_flags &= ~ESP_STAT_RX_TIMEOUT;
-               return;
-       }
-
-       status_mask = (info->ignore_status_mask >> 2) & 0x07;
-
-       for (i = 0; i < num_bytes; i++) {
-               if (!(err_buf->data[i] & status_mask)) {
-                       int flag = 0;
-
-                       if (err_buf->data[i] & 0x04) {
-                               flag = TTY_BREAK;
-                               if (info->port.flags & ASYNC_SAK)
-                                       do_SAK(tty);
-                       } else if (err_buf->data[i] & 0x02)
-                               flag = TTY_FRAME;
-                       else if (err_buf->data[i] & 0x01)
-                               flag = TTY_PARITY;
-                       tty_insert_flip_char(tty, pio_buf->data[i], flag);
-               }
-       }
-
-       tty_schedule_flip(tty);
-
-       info->stat_flags &= ~ESP_STAT_RX_TIMEOUT;
-       release_pio_buffer(pio_buf);
-       release_pio_buffer(err_buf);
-}
-
-static void program_isa_dma(int dma, int dir, unsigned long addr, int len)
-{
-       unsigned long flags;
-
-       flags = claim_dma_lock();
-       disable_dma(dma);
-       clear_dma_ff(dma);
-       set_dma_mode(dma, dir);
-       set_dma_addr(dma, addr);
-       set_dma_count(dma, len);
-       enable_dma(dma);
-       release_dma_lock(flags);
-}
-
-static void receive_chars_dma(struct esp_struct *info, int num_bytes)
-{
-       info->stat_flags &= ~ESP_STAT_RX_TIMEOUT;
-       dma_bytes = num_bytes;
-       info->stat_flags |= ESP_STAT_DMA_RX;
-
-       program_isa_dma(dma, DMA_MODE_READ, isa_virt_to_bus(dma_buffer),
-                                                               dma_bytes);
-       serial_out(info, UART_ESI_CMD1, ESI_START_DMA_RX);
-}
-
-static inline void receive_chars_dma_done(struct esp_struct *info,
-                                           int status)
-{
-       struct tty_struct *tty = info->port.tty;
-       int num_bytes;
-       unsigned long flags;
-
-       flags = claim_dma_lock();
-       disable_dma(dma);
-       clear_dma_ff(dma);
-
-       info->stat_flags &= ~ESP_STAT_DMA_RX;
-       num_bytes = dma_bytes - get_dma_residue(dma);
-       release_dma_lock(flags);
-
-       info->icount.rx += num_bytes;
-
-       if (num_bytes > 0) {
-               tty_insert_flip_string(tty, dma_buffer, num_bytes - 1);
-
-               status &= (0x1c & info->read_status_mask);
-
-               /* Is the status significant or do we throw the last byte ? */
-               if (!(status & info->ignore_status_mask)) {
-                       int statflag = 0;
-
-                       if (status & 0x10) {
-                               statflag = TTY_BREAK;
-                               (info->icount.brk)++;
-                               if (info->port.flags & ASYNC_SAK)
-                                       do_SAK(tty);
-                       } else if (status & 0x08) {
-                               statflag = TTY_FRAME;
-                               info->icount.frame++;
-                       } else if (status & 0x04) {
-                               statflag = TTY_PARITY;
-                               info->icount.parity++;
-                       }
-                       tty_insert_flip_char(tty, dma_buffer[num_bytes - 1],
-                                                               statflag);
-               }
-               tty_schedule_flip(tty);
-       }
-
-       if (dma_bytes != num_bytes) {
-               num_bytes = dma_bytes - num_bytes;
-               dma_bytes = 0;
-               receive_chars_dma(info, num_bytes);
-       } else
-               dma_bytes = 0;
-}
-
-/* Caller must hold info->lock */
-
-static inline void transmit_chars_pio(struct esp_struct *info,
-                                       int space_avail)
-{
-       int i;
-       struct esp_pio_buffer *pio_buf;
-
-       pio_buf = get_pio_buffer();
-
-       if (!pio_buf)
-               return;
-
-       while (space_avail && info->xmit_cnt) {
-               if (info->xmit_tail + space_avail <= ESP_XMIT_SIZE) {
-                       memcpy(pio_buf->data,
-                              &(info->xmit_buf[info->xmit_tail]),
-                              space_avail);
-               } else {
-                       i = ESP_XMIT_SIZE - info->xmit_tail;
-                       memcpy(pio_buf->data,
-                              &(info->xmit_buf[info->xmit_tail]), i);
-                       memcpy(&(pio_buf->data[i]), info->xmit_buf,
-                              space_avail - i);
-               }
-
-               info->xmit_cnt -= space_avail;
-               info->xmit_tail = (info->xmit_tail + space_avail) &
-                       (ESP_XMIT_SIZE - 1);
-
-               for (i = 0; i < space_avail - 1; i += 2) {
-                       outw(*((unsigned short *)(pio_buf->data + i)),
-                            info->io_port + UART_ESI_TX);
-               }
-
-               if (space_avail & 0x0001)
-                       serial_out(info, UART_ESI_TX,
-                                  pio_buf->data[space_avail - 1]);
-
-               if (info->xmit_cnt) {
-                       serial_out(info, UART_ESI_CMD1, ESI_NO_COMMAND);
-                       serial_out(info, UART_ESI_CMD1, ESI_GET_TX_AVAIL);
-                       space_avail = serial_in(info, UART_ESI_STAT1) << 8;
-                       space_avail |= serial_in(info, UART_ESI_STAT2);
-
-                       if (space_avail > info->xmit_cnt)
-                               space_avail = info->xmit_cnt;
-               }
-       }
-
-       if (info->xmit_cnt < WAKEUP_CHARS) {
-               if (info->port.tty)
-                       tty_wakeup(info->port.tty);
-
-#ifdef SERIAL_DEBUG_INTR
-               printk("THRE...");
-#endif
-
-               if (info->xmit_cnt <= 0) {
-                       info->IER &= ~UART_IER_THRI;
-                       serial_out(info, UART_ESI_CMD1,
-                                  ESI_SET_SRV_MASK);
-                       serial_out(info, UART_ESI_CMD2, info->IER);
-               }
-       }
-
-       release_pio_buffer(pio_buf);
-}
-
-/* Caller must hold info->lock */
-static inline void transmit_chars_dma(struct esp_struct *info, int num_bytes)
-{
-       dma_bytes = num_bytes;
-
-       if (info->xmit_tail + dma_bytes <= ESP_XMIT_SIZE) {
-               memcpy(dma_buffer, &(info->xmit_buf[info->xmit_tail]),
-                      dma_bytes);
-       } else {
-               int i = ESP_XMIT_SIZE - info->xmit_tail;
-               memcpy(dma_buffer, &(info->xmit_buf[info->xmit_tail]),
-                       i);
-               memcpy(&(dma_buffer[i]), info->xmit_buf, dma_bytes - i);
-       }
-
-       info->xmit_cnt -= dma_bytes;
-       info->xmit_tail = (info->xmit_tail + dma_bytes) & (ESP_XMIT_SIZE - 1);
-
-       if (info->xmit_cnt < WAKEUP_CHARS) {
-               if (info->port.tty)
-                       tty_wakeup(info->port.tty);
-
-#ifdef SERIAL_DEBUG_INTR
-               printk("THRE...");
-#endif
-
-               if (info->xmit_cnt <= 0) {
-                       info->IER &= ~UART_IER_THRI;
-                       serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
-                       serial_out(info, UART_ESI_CMD2, info->IER);
-               }
-       }
-
-       info->stat_flags |= ESP_STAT_DMA_TX;
-
-       program_isa_dma(dma, DMA_MODE_WRITE, isa_virt_to_bus(dma_buffer),
-                                                               dma_bytes);
-       serial_out(info, UART_ESI_CMD1, ESI_START_DMA_TX);
-}
-
-static inline void transmit_chars_dma_done(struct esp_struct *info)
-{
-       int num_bytes;
-       unsigned long flags;
-
-       flags = claim_dma_lock();
-       disable_dma(dma);
-       clear_dma_ff(dma);
-
-       num_bytes = dma_bytes - get_dma_residue(dma);
-       info->icount.tx += dma_bytes;
-       release_dma_lock(flags);
-
-       if (dma_bytes != num_bytes) {
-               dma_bytes -= num_bytes;
-               memmove(dma_buffer, dma_buffer + num_bytes, dma_bytes);
-
-               program_isa_dma(dma, DMA_MODE_WRITE,
-                               isa_virt_to_bus(dma_buffer), dma_bytes);
-
-               serial_out(info, UART_ESI_CMD1, ESI_START_DMA_TX);
-       } else {
-               dma_bytes = 0;
-               info->stat_flags &= ~ESP_STAT_DMA_TX;
-       }
-}
-
-static void check_modem_status(struct esp_struct *info)
-{
-       int     status;
-
-       serial_out(info, UART_ESI_CMD1, ESI_GET_UART_STAT);
-       status = serial_in(info, UART_ESI_STAT2);
-
-       if (status & UART_MSR_ANY_DELTA) {
-               /* update input line counters */
-               if (status & UART_MSR_TERI)
-                       info->icount.rng++;
-               if (status & UART_MSR_DDSR)
-                       info->icount.dsr++;
-               if (status & UART_MSR_DDCD)
-                       info->icount.dcd++;
-               if (status & UART_MSR_DCTS)
-                       info->icount.cts++;
-               wake_up_interruptible(&info->port.delta_msr_wait);
-       }
-
-       if ((info->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
-#if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR))
-               printk("ttys%d CD now %s...", info->line,
-                      (status & UART_MSR_DCD) ? "on" : "off");
-#endif
-               if (status & UART_MSR_DCD)
-                       wake_up_interruptible(&info->port.open_wait);
-               else {
-#ifdef SERIAL_DEBUG_OPEN
-                       printk("scheduling hangup...");
-#endif
-                       tty_hangup(info->port.tty);
-               }
-       }
-}
-
-/*
- * This is the serial driver's interrupt routine
- */
-static irqreturn_t rs_interrupt_single(int irq, void *dev_id)
-{
-       struct esp_struct *info;
-       unsigned err_status;
-       unsigned int scratch;
-
-#ifdef SERIAL_DEBUG_INTR
-       printk("rs_interrupt_single(%d)...", irq);
-#endif
-       info = (struct esp_struct *)dev_id;
-       err_status = 0;
-       scratch = serial_in(info, UART_ESI_SID);
-
-       spin_lock(&info->lock);
-
-       if (!info->port.tty) {
-               spin_unlock(&info->lock);
-               return IRQ_NONE;
-       }
-
-       if (scratch & 0x04) { /* error */
-               serial_out(info, UART_ESI_CMD1, ESI_GET_ERR_STAT);
-               err_status = serial_in(info, UART_ESI_STAT1);
-               serial_in(info, UART_ESI_STAT2);
-
-               if (err_status & 0x01)
-                       info->stat_flags |= ESP_STAT_RX_TIMEOUT;
-
-               if (err_status & 0x20) /* UART status */
-                       check_modem_status(info);
-
-               if (err_status & 0x80) /* Start break */
-                       wake_up_interruptible(&info->break_wait);
-       }
-
-       if ((scratch & 0x88) || /* DMA completed or timed out */
-           (err_status & 0x1c) /* receive error */) {
-               if (info->stat_flags & ESP_STAT_DMA_RX)
-                       receive_chars_dma_done(info, err_status);
-               else if (info->stat_flags & ESP_STAT_DMA_TX)
-                       transmit_chars_dma_done(info);
-       }
-
-       if (!(info->stat_flags & (ESP_STAT_DMA_RX | ESP_STAT_DMA_TX)) &&
-           ((scratch & 0x01) || (info->stat_flags & ESP_STAT_RX_TIMEOUT)) &&
-           (info->IER & UART_IER_RDI)) {
-               int num_bytes;
-
-               serial_out(info, UART_ESI_CMD1, ESI_NO_COMMAND);
-               serial_out(info, UART_ESI_CMD1, ESI_GET_RX_AVAIL);
-               num_bytes = serial_in(info, UART_ESI_STAT1) << 8;
-               num_bytes |= serial_in(info, UART_ESI_STAT2);
-
-               num_bytes = tty_buffer_request_room(info->port.tty, num_bytes);
-
-               if (num_bytes) {
-                       if (dma_bytes ||
-                           (info->stat_flags & ESP_STAT_USE_PIO) ||
-                           (num_bytes <= info->config.pio_threshold))
-                               receive_chars_pio(info, num_bytes);
-                       else
-                               receive_chars_dma(info, num_bytes);
-               }
-       }
-
-       if (!(info->stat_flags & (ESP_STAT_DMA_RX | ESP_STAT_DMA_TX)) &&
-           (scratch & 0x02) && (info->IER & UART_IER_THRI)) {
-               if ((info->xmit_cnt <= 0) || info->port.tty->stopped) {
-                       info->IER &= ~UART_IER_THRI;
-                       serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
-                       serial_out(info, UART_ESI_CMD2, info->IER);
-               } else {
-                       int num_bytes;
-
-                       serial_out(info, UART_ESI_CMD1, ESI_NO_COMMAND);
-                       serial_out(info, UART_ESI_CMD1, ESI_GET_TX_AVAIL);
-                       num_bytes = serial_in(info, UART_ESI_STAT1) << 8;
-                       num_bytes |= serial_in(info, UART_ESI_STAT2);
-
-                       if (num_bytes > info->xmit_cnt)
-                               num_bytes = info->xmit_cnt;
-
-                       if (num_bytes) {
-                               if (dma_bytes ||
-                                   (info->stat_flags & ESP_STAT_USE_PIO) ||
-                                   (num_bytes <= info->config.pio_threshold))
-                                       transmit_chars_pio(info, num_bytes);
-                               else
-                                       transmit_chars_dma(info, num_bytes);
-                       }
-               }
-       }
-
-       info->last_active = jiffies;
-
-#ifdef SERIAL_DEBUG_INTR
-       printk("end.\n");
-#endif
-       spin_unlock(&info->lock);
-       return IRQ_HANDLED;
-}
-
-/*
- * -------------------------------------------------------------------
- * Here ends the serial interrupt routines.
- * -------------------------------------------------------------------
- */
-
-/*
- * ---------------------------------------------------------------
- * Low level utility subroutines for the serial driver:  routines to
- * figure out the appropriate timeout for an interrupt chain, routines
- * to initialize and startup a serial port, and routines to shutdown a
- * serial port.  Useful stuff like that.
- *
- * Caller should hold lock
- * ---------------------------------------------------------------
- */
-
-static void esp_basic_init(struct esp_struct *info)
-{
-       /* put ESPC in enhanced mode */
-       serial_out(info, UART_ESI_CMD1, ESI_SET_MODE);
-
-       if (info->stat_flags & ESP_STAT_NEVER_DMA)
-               serial_out(info, UART_ESI_CMD2, 0x01);
-       else
-               serial_out(info, UART_ESI_CMD2, 0x31);
-
-       /* disable interrupts for now */
-       serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
-       serial_out(info, UART_ESI_CMD2, 0x00);
-
-       /* set interrupt and DMA channel */
-       serial_out(info, UART_ESI_CMD1, ESI_SET_IRQ);
-
-       if (info->stat_flags & ESP_STAT_NEVER_DMA)
-               serial_out(info, UART_ESI_CMD2, 0x01);
-       else
-               serial_out(info, UART_ESI_CMD2, (dma << 4) | 0x01);
-
-       serial_out(info, UART_ESI_CMD1, ESI_SET_ENH_IRQ);
-
-       if (info->line % 8)     /* secondary port */
-               serial_out(info, UART_ESI_CMD2, 0x0d);  /* shared */
-       else if (info->irq == 9)
-               serial_out(info, UART_ESI_CMD2, 0x02);
-       else
-               serial_out(info, UART_ESI_CMD2, info->irq);
-
-       /* set error status mask (check this) */
-       serial_out(info, UART_ESI_CMD1, ESI_SET_ERR_MASK);
-
-       if (info->stat_flags & ESP_STAT_NEVER_DMA)
-               serial_out(info, UART_ESI_CMD2, 0xa1);
-       else
-               serial_out(info, UART_ESI_CMD2, 0xbd);
-
-       serial_out(info, UART_ESI_CMD2, 0x00);
-
-       /* set DMA timeout */
-       serial_out(info, UART_ESI_CMD1, ESI_SET_DMA_TMOUT);
-       serial_out(info, UART_ESI_CMD2, 0xff);
-
-       /* set FIFO trigger levels */
-       serial_out(info, UART_ESI_CMD1, ESI_SET_TRIGGER);
-       serial_out(info, UART_ESI_CMD2, info->config.rx_trigger >> 8);
-       serial_out(info, UART_ESI_CMD2, info->config.rx_trigger);
-       serial_out(info, UART_ESI_CMD2, info->config.tx_trigger >> 8);
-       serial_out(info, UART_ESI_CMD2, info->config.tx_trigger);
-
-       /* Set clock scaling and wait states */
-       serial_out(info, UART_ESI_CMD1, ESI_SET_PRESCALAR);
-       serial_out(info, UART_ESI_CMD2, 0x04 | ESPC_SCALE);
-
-       /* set reinterrupt pacing */
-       serial_out(info, UART_ESI_CMD1, ESI_SET_REINTR);
-       serial_out(info, UART_ESI_CMD2, 0xff);
-}
-
-static int startup(struct esp_struct *info)
-{
-       unsigned long flags;
-       int     retval = 0;
-       unsigned int num_chars;
-
-       spin_lock_irqsave(&info->lock, flags);
-
-       if (info->port.flags & ASYNC_INITIALIZED)
-               goto out;
-
-       if (!info->xmit_buf) {
-               info->xmit_buf = (unsigned char *)get_zeroed_page(GFP_ATOMIC);
-               retval = -ENOMEM;
-               if (!info->xmit_buf)
-                       goto out;
-       }
-
-#ifdef SERIAL_DEBUG_OPEN
-       printk(KERN_DEBUG "starting up ttys%d (irq %d)...",
-                                               info->line, info->irq);
-#endif
-
-       /* Flush the RX buffer.  Using the ESI flush command may cause */
-       /* wild interrupts, so read all the data instead. */
-
-       serial_out(info, UART_ESI_CMD1, ESI_NO_COMMAND);
-       serial_out(info, UART_ESI_CMD1, ESI_GET_RX_AVAIL);
-       num_chars = serial_in(info, UART_ESI_STAT1) << 8;
-       num_chars |= serial_in(info, UART_ESI_STAT2);
-
-       while (num_chars > 1) {
-               inw(info->io_port + UART_ESI_RX);
-               num_chars -= 2;
-       }
-
-       if (num_chars)
-               serial_in(info, UART_ESI_RX);
-
-       /* set receive character timeout */
-       serial_out(info, UART_ESI_CMD1, ESI_SET_RX_TIMEOUT);
-       serial_out(info, UART_ESI_CMD2, info->config.rx_timeout);
-
-       /* clear all flags except the "never DMA" flag */
-       info->stat_flags &= ESP_STAT_NEVER_DMA;
-
-       if (info->stat_flags & ESP_STAT_NEVER_DMA)
-               info->stat_flags |= ESP_STAT_USE_PIO;
-
-       spin_unlock_irqrestore(&info->lock, flags);
-
-       /*
-        * Allocate the IRQ
-        */
-
-       retval = request_irq(info->irq, rs_interrupt_single, IRQF_SHARED,
-                            "esp serial", info);
-
-       if (retval) {
-               if (capable(CAP_SYS_ADMIN)) {
-                       if (info->port.tty)
-                               set_bit(TTY_IO_ERROR,
-                                       &info->port.tty->flags);
-                       retval = 0;
-               }
-               goto out_unlocked;
-       }
-
-       if (!(info->stat_flags & ESP_STAT_USE_PIO) && !dma_buffer) {
-               dma_buffer = (char *)__get_dma_pages(
-                       GFP_KERNEL, get_order(DMA_BUFFER_SZ));
-
-               /* use PIO mode if DMA buf/chan cannot be allocated */
-               if (!dma_buffer)
-                       info->stat_flags |= ESP_STAT_USE_PIO;
-               else if (request_dma(dma, "esp serial")) {
-                       free_pages((unsigned long)dma_buffer,
-                                  get_order(DMA_BUFFER_SZ));
-                       dma_buffer = NULL;
-                       info->stat_flags |= ESP_STAT_USE_PIO;
-               }
-
-       }
-
-       info->MCR = UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2;
-
-       spin_lock_irqsave(&info->lock, flags);
-       serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART);
-       serial_out(info, UART_ESI_CMD2, UART_MCR);
-       serial_out(info, UART_ESI_CMD2, info->MCR);
-
-       /*
-        * Finally, enable interrupts
-        */
-       /* info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI; */
-       info->IER = UART_IER_RLSI | UART_IER_RDI | UART_IER_DMA_TMOUT |
-                       UART_IER_DMA_TC;
-       serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
-       serial_out(info, UART_ESI_CMD2, info->IER);
-
-       if (info->port.tty)
-               clear_bit(TTY_IO_ERROR, &info->port.tty->flags);
-       info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
-       spin_unlock_irqrestore(&info->lock, flags);
-
-       /*
-        * Set up the tty->alt_speed kludge
-        */
-       if (info->port.tty) {
-               if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
-                       info->port.tty->alt_speed = 57600;
-               if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
-                       info->port.tty->alt_speed = 115200;
-               if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
-                       info->port.tty->alt_speed = 230400;
-               if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
-                       info->port.tty->alt_speed = 460800;
-       }
-
-       /*
-        * set the speed of the serial port
-        */
-       change_speed(info);
-       info->port.flags |= ASYNC_INITIALIZED;
-       return 0;
-
-out:
-       spin_unlock_irqrestore(&info->lock, flags);
-out_unlocked:
-       return retval;
-}
-
-/*
- * This routine will shutdown a serial port; interrupts are disabled, and
- * DTR is dropped if the hangup on close termio flag is on.
- */
-static void shutdown(struct esp_struct *info)
-{
-       unsigned long   flags, f;
-
-       if (!(info->port.flags & ASYNC_INITIALIZED))
-               return;
-
-#ifdef SERIAL_DEBUG_OPEN
-       printk("Shutting down serial port %d (irq %d)....", info->line,
-              info->irq);
-#endif
-
-       spin_lock_irqsave(&info->lock, flags);
-       /*
-        * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
-        * here so the queue might never be waken up
-        */
-       wake_up_interruptible(&info->port.delta_msr_wait);
-       wake_up_interruptible(&info->break_wait);
-
-       /* stop a DMA transfer on the port being closed */
-       /* DMA lock is higher priority always */
-       if (info->stat_flags & (ESP_STAT_DMA_RX | ESP_STAT_DMA_TX)) {
-               f = claim_dma_lock();
-               disable_dma(dma);
-               clear_dma_ff(dma);
-               release_dma_lock(f);
-
-               dma_bytes = 0;
-       }
-
-       /*
-        * Free the IRQ
-        */
-       free_irq(info->irq, info);
-
-       if (dma_buffer) {
-               struct esp_struct *current_port = ports;
-
-               while (current_port) {
-                       if ((current_port != info) &&
-                           (current_port->port.flags & ASYNC_INITIALIZED))
-                               break;
-
-                       current_port = current_port->next_port;
-               }
-
-               if (!current_port) {
-                       free_dma(dma);
-                       free_pages((unsigned long)dma_buffer,
-                                  get_order(DMA_BUFFER_SZ));
-                       dma_buffer = NULL;
-               }
-       }
-
-       if (info->xmit_buf) {
-               free_page((unsigned long) info->xmit_buf);
-               info->xmit_buf = NULL;
-       }
-
-       info->IER = 0;
-       serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
-       serial_out(info, UART_ESI_CMD2, 0x00);
-
-       if (!info->port.tty || (info->port.tty->termios->c_cflag & HUPCL))
-               info->MCR &= ~(UART_MCR_DTR|UART_MCR_RTS);
-
-       info->MCR &= ~UART_MCR_OUT2;
-       serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART);
-       serial_out(info, UART_ESI_CMD2, UART_MCR);
-       serial_out(info, UART_ESI_CMD2, info->MCR);
-
-       if (info->port.tty)
-               set_bit(TTY_IO_ERROR, &info->port.tty->flags);
-
-       info->port.flags &= ~ASYNC_INITIALIZED;
-       spin_unlock_irqrestore(&info->lock, flags);
-}
-
-/*
- * This routine is called to set the UART divisor registers to match
- * the specified baud rate for a serial port.
- */
-static void change_speed(struct esp_struct *info)
-{
-       unsigned short port;
-       int     quot = 0;
-       unsigned cflag, cval;
-       int     baud, bits;
-       unsigned char flow1 = 0, flow2 = 0;
-       unsigned long flags;
-
-       if (!info->port.tty || !info->port.tty->termios)
-               return;
-       cflag = info->port.tty->termios->c_cflag;
-       port = info->io_port;
-
-       /* byte size and parity */
-       switch (cflag & CSIZE) {
-       case CS5: cval = 0x00; bits = 7; break;
-       case CS6: cval = 0x01; bits = 8; break;
-       case CS7: cval = 0x02; bits = 9; break;
-       case CS8: cval = 0x03; bits = 10; break;
-       default:  cval = 0x00; bits = 7; break;
-       }
-       if (cflag & CSTOPB) {
-               cval |= 0x04;
-               bits++;
-       }
-       if (cflag & PARENB) {
-               cval |= UART_LCR_PARITY;
-               bits++;
-       }
-       if (!(cflag & PARODD))
-               cval |= UART_LCR_EPAR;
-#ifdef CMSPAR
-       if (cflag & CMSPAR)
-               cval |= UART_LCR_SPAR;
-#endif
-       baud = tty_get_baud_rate(info->port.tty);
-       if (baud == 38400 &&
-               ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST))
-               quot = info->custom_divisor;
-       else {
-               if (baud == 134) /* Special case since 134 is really 134.5 */
-                       quot = (2*BASE_BAUD / 269);
-               else if (baud)
-                       quot = BASE_BAUD / baud;
-       }
-       /* If the quotient is ever zero, default to 9600 bps */
-       if (!quot)
-               quot = BASE_BAUD / 9600;
-
-       if (baud) {
-               /* Actual rate */
-               baud = BASE_BAUD/quot;
-               tty_encode_baud_rate(info->port.tty, baud, baud);
-       }
-       info->timeout = ((1024 * HZ * bits * quot) / BASE_BAUD) + (HZ / 50);
-
-       /* CTS flow control flag and modem status interrupts */
-       /* info->IER &= ~UART_IER_MSI; */
-       if (cflag & CRTSCTS) {
-               info->port.flags |= ASYNC_CTS_FLOW;
-               /* info->IER |= UART_IER_MSI; */
-               flow1 = 0x04;
-               flow2 = 0x10;
-       } else
-               info->port.flags &= ~ASYNC_CTS_FLOW;
-       if (cflag & CLOCAL)
-               info->port.flags &= ~ASYNC_CHECK_CD;
-       else
-               info->port.flags |= ASYNC_CHECK_CD;
-
-       /*
-        * Set up parity check flag
-        */
-       info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
-       if (I_INPCK(info->port.tty))
-               info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
-       if (I_BRKINT(info->port.tty) || I_PARMRK(info->port.tty))
-               info->read_status_mask |= UART_LSR_BI;
-
-       info->ignore_status_mask = 0;
-#if 0
-       /* This should be safe, but for some broken bits of hardware... */
-       if (I_IGNPAR(info->port.tty)) {
-               info->ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
-               info->read_status_mask |= UART_LSR_PE | UART_LSR_FE;
-       }
-#endif
-       if (I_IGNBRK(info->port.tty)) {
-               info->ignore_status_mask |= UART_LSR_BI;
-               info->read_status_mask |= UART_LSR_BI;
-               /*
-                * If we're ignore parity and break indicators, ignore
-                * overruns too.  (For real raw support).
-                */
-               if (I_IGNPAR(info->port.tty)) {
-                       info->ignore_status_mask |= UART_LSR_OE | \
-                               UART_LSR_PE | UART_LSR_FE;
-                       info->read_status_mask |= UART_LSR_OE | \
-                               UART_LSR_PE | UART_LSR_FE;
-               }
-       }
-
-       if (I_IXOFF(info->port.tty))
-               flow1 |= 0x81;
-
-       spin_lock_irqsave(&info->lock, flags);
-       /* set baud */
-       serial_out(info, UART_ESI_CMD1, ESI_SET_BAUD);
-       serial_out(info, UART_ESI_CMD2, quot >> 8);
-       serial_out(info, UART_ESI_CMD2, quot & 0xff);
-
-       /* set data bits, parity, etc. */
-       serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART);
-       serial_out(info, UART_ESI_CMD2, UART_LCR);
-       serial_out(info, UART_ESI_CMD2, cval);
-
-       /* Enable flow control */
-       serial_out(info, UART_ESI_CMD1, ESI_SET_FLOW_CNTL);
-       serial_out(info, UART_ESI_CMD2, flow1);
-       serial_out(info, UART_ESI_CMD2, flow2);
-
-       /* set flow control characters (XON/XOFF only) */
-       if (I_IXOFF(info->port.tty)) {
-               serial_out(info, UART_ESI_CMD1, ESI_SET_FLOW_CHARS);
-               serial_out(info, UART_ESI_CMD2, START_CHAR(info->port.tty));
-               serial_out(info, UART_ESI_CMD2, STOP_CHAR(info->port.tty));
-               serial_out(info, UART_ESI_CMD2, 0x10);
-               serial_out(info, UART_ESI_CMD2, 0x21);
-               switch (cflag & CSIZE) {
-               case CS5:
-                       serial_out(info, UART_ESI_CMD2, 0x1f);
-                       break;
-               case CS6:
-                       serial_out(info, UART_ESI_CMD2, 0x3f);
-                       break;
-               case CS7:
-               case CS8:
-                       serial_out(info, UART_ESI_CMD2, 0x7f);
-                       break;
-               default:
-                       serial_out(info, UART_ESI_CMD2, 0xff);
-                       break;
-               }
-       }
-
-       /* Set high/low water */
-       serial_out(info, UART_ESI_CMD1, ESI_SET_FLOW_LVL);
-       serial_out(info, UART_ESI_CMD2, info->config.flow_off >> 8);
-       serial_out(info, UART_ESI_CMD2, info->config.flow_off);
-       serial_out(info, UART_ESI_CMD2, info->config.flow_on >> 8);
-       serial_out(info, UART_ESI_CMD2, info->config.flow_on);
-
-       spin_unlock_irqrestore(&info->lock, flags);
-}
-
-static int rs_put_char(struct tty_struct *tty, unsigned char ch)
-{
-       struct esp_struct *info = tty->driver_data;
-       unsigned long flags;
-       int ret = 0;
-
-       if (serial_paranoia_check(info, tty->name, "rs_put_char"))
-               return 0;
-
-       if (!info->xmit_buf)
-               return 0;
-
-       spin_lock_irqsave(&info->lock, flags);
-       if (info->xmit_cnt < ESP_XMIT_SIZE - 1) {
-               info->xmit_buf[info->xmit_head++] = ch;
-               info->xmit_head &= ESP_XMIT_SIZE-1;
-               info->xmit_cnt++;
-               ret = 1;
-       }
-       spin_unlock_irqrestore(&info->lock, flags);
-       return ret;
-}
-
-static void rs_flush_chars(struct tty_struct *tty)
-{
-       struct esp_struct *info = tty->driver_data;
-       unsigned long flags;
-
-       if (serial_paranoia_check(info, tty->name, "rs_flush_chars"))
-               return;
-
-       spin_lock_irqsave(&info->lock, flags);
-
-       if (info->xmit_cnt <= 0 || tty->stopped || !info->xmit_buf)
-               goto out;
-
-       if (!(info->IER & UART_IER_THRI)) {
-               info->IER |= UART_IER_THRI;
-               serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
-               serial_out(info, UART_ESI_CMD2, info->IER);
-       }
-out:
-       spin_unlock_irqrestore(&info->lock, flags);
-}
-
-static int rs_write(struct tty_struct *tty,
-                   const unsigned char *buf, int count)
-{
-       int     c, t, ret = 0;
-       struct esp_struct *info = tty->driver_data;
-       unsigned long flags;
-
-       if (serial_paranoia_check(info, tty->name, "rs_write"))
-               return 0;
-
-       if (!info->xmit_buf)
-               return 0;
-
-       while (1) {
-               /* Thanks to R. Wolff for suggesting how to do this with */
-               /* interrupts enabled */
-
-               c = count;
-               t = ESP_XMIT_SIZE - info->xmit_cnt - 1;
-
-               if (t < c)
-                       c = t;
-
-               t = ESP_XMIT_SIZE - info->xmit_head;
-
-               if (t < c)
-                       c = t;
-
-               if (c <= 0)
-                       break;
-
-               memcpy(info->xmit_buf + info->xmit_head, buf, c);
-
-               info->xmit_head = (info->xmit_head + c) & (ESP_XMIT_SIZE-1);
-               info->xmit_cnt += c;
-               buf += c;
-               count -= c;
-               ret += c;
-       }
-
-       spin_lock_irqsave(&info->lock, flags);
-
-       if (info->xmit_cnt && !tty->stopped && !(info->IER & UART_IER_THRI)) {
-               info->IER |= UART_IER_THRI;
-               serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
-               serial_out(info, UART_ESI_CMD2, info->IER);
-       }
-
-       spin_unlock_irqrestore(&info->lock, flags);
-       return ret;
-}
-
-static int rs_write_room(struct tty_struct *tty)
-{
-       struct esp_struct *info = tty->driver_data;
-       int     ret;
-       unsigned long flags;
-
-       if (serial_paranoia_check(info, tty->name, "rs_write_room"))
-               return 0;
-
-       spin_lock_irqsave(&info->lock, flags);
-
-       ret = ESP_XMIT_SIZE - info->xmit_cnt - 1;
-       if (ret < 0)
-               ret = 0;
-       spin_unlock_irqrestore(&info->lock, flags);
-       return ret;
-}
-
-static int rs_chars_in_buffer(struct tty_struct *tty)
-{
-       struct esp_struct *info = tty->driver_data;
-
-       if (serial_paranoia_check(info, tty->name, "rs_chars_in_buffer"))
-               return 0;
-       return info->xmit_cnt;
-}
-
-static void rs_flush_buffer(struct tty_struct *tty)
-{
-       struct esp_struct *info = tty->driver_data;
-       unsigned long flags;
-
-       if (serial_paranoia_check(info, tty->name, "rs_flush_buffer"))
-               return;
-       spin_lock_irqsave(&info->lock, flags);
-       info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
-       spin_unlock_irqrestore(&info->lock, flags);
-       tty_wakeup(tty);
-}
-
-/*
- * ------------------------------------------------------------
- * rs_throttle()
- *
- * This routine is called by the upper-layer tty layer to signal that
- * incoming characters should be throttled.
- * ------------------------------------------------------------
- */
-static void rs_throttle(struct tty_struct *tty)
-{
-       struct esp_struct *info = tty->driver_data;
-       unsigned long flags;
-#ifdef SERIAL_DEBUG_THROTTLE
-       char    buf[64];
-
-       printk("throttle %s: %d....\n", tty_name(tty, buf),
-                                               tty_chars_in_buffer(tty));
-#endif
-
-       if (serial_paranoia_check(info, tty->name, "rs_throttle"))
-               return;
-
-       spin_lock_irqsave(&info->lock, flags);
-       info->IER &= ~UART_IER_RDI;
-       serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
-       serial_out(info, UART_ESI_CMD2, info->IER);
-       serial_out(info, UART_ESI_CMD1, ESI_SET_RX_TIMEOUT);
-       serial_out(info, UART_ESI_CMD2, 0x00);
-       spin_unlock_irqrestore(&info->lock, flags);
-}
-
-static void rs_unthrottle(struct tty_struct *tty)
-{
-       struct esp_struct *info = tty->driver_data;
-       unsigned long flags;
-#ifdef SERIAL_DEBUG_THROTTLE
-       char    buf[64];
-
-       printk(KERN_DEBUG "unthrottle %s: %d....\n", tty_name(tty, buf),
-              tty_chars_in_buffer(tty));
-#endif
-
-       if (serial_paranoia_check(info, tty->name, "rs_unthrottle"))
-               return;
-
-       spin_lock_irqsave(&info->lock, flags);
-       info->IER |= UART_IER_RDI;
-       serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
-       serial_out(info, UART_ESI_CMD2, info->IER);
-       serial_out(info, UART_ESI_CMD1, ESI_SET_RX_TIMEOUT);
-       serial_out(info, UART_ESI_CMD2, info->config.rx_timeout);
-       spin_unlock_irqrestore(&info->lock, flags);
-}
-
-/*
- * ------------------------------------------------------------
- * rs_ioctl() and friends
- * ------------------------------------------------------------
- */
-
-static int get_serial_info(struct esp_struct *info,
-                          struct serial_struct __user *retinfo)
-{
-       struct serial_struct tmp;
-
-       lock_kernel();
-       memset(&tmp, 0, sizeof(tmp));
-       tmp.type = PORT_16550A;
-       tmp.line = info->line;
-       tmp.port = info->io_port;
-       tmp.irq = info->irq;
-       tmp.flags = info->port.flags;
-       tmp.xmit_fifo_size = 1024;
-       tmp.baud_base = BASE_BAUD;
-       tmp.close_delay = info->close_delay;
-       tmp.closing_wait = info->closing_wait;
-       tmp.custom_divisor = info->custom_divisor;
-       tmp.hub6 = 0;
-       unlock_kernel();
-       if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
-               return -EFAULT;
-       return 0;
-}
-
-static int get_esp_config(struct esp_struct *info,
-                         struct hayes_esp_config __user *retinfo)
-{
-       struct hayes_esp_config tmp;
-
-       if (!retinfo)
-               return -EFAULT;
-
-       memset(&tmp, 0, sizeof(tmp));
-       lock_kernel();
-       tmp.rx_timeout = info->config.rx_timeout;
-       tmp.rx_trigger = info->config.rx_trigger;
-       tmp.tx_trigger = info->config.tx_trigger;
-       tmp.flow_off = info->config.flow_off;
-       tmp.flow_on = info->config.flow_on;
-       tmp.pio_threshold = info->config.pio_threshold;
-       tmp.dma_channel = (info->stat_flags & ESP_STAT_NEVER_DMA ? 0 : dma);
-       unlock_kernel();
-
-       return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
-}
-
-static int set_serial_info(struct esp_struct *info,
-                          struct serial_struct __user *new_info)
-{
-       struct serial_struct new_serial;
-       struct esp_struct old_info;
-       unsigned int change_irq;
-       int retval = 0;
-       struct esp_struct *current_async;
-
-       if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
-               return -EFAULT;
-       old_info = *info;
-
-       if ((new_serial.type != PORT_16550A) ||
-           (new_serial.hub6) ||
-           (info->io_port != new_serial.port) ||
-           (new_serial.baud_base != BASE_BAUD) ||
-           (new_serial.irq > 15) ||
-           (new_serial.irq < 2) ||
-           (new_serial.irq == 6) ||
-           (new_serial.irq == 8) ||
-           (new_serial.irq == 13))
-               return -EINVAL;
-
-       change_irq = new_serial.irq != info->irq;
-
-       if (change_irq && (info->line % 8))
-               return -EINVAL;
-
-       if (!capable(CAP_SYS_ADMIN)) {
-               if (change_irq ||
-                   (new_serial.close_delay != info->close_delay) ||
-                   ((new_serial.flags & ~ASYNC_USR_MASK) !=
-                    (info->port.flags & ~ASYNC_USR_MASK)))
-                       return -EPERM;
-               info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
-                              (new_serial.flags & ASYNC_USR_MASK));
-               info->custom_divisor = new_serial.custom_divisor;
-       } else {
-               if (new_serial.irq == 2)
-                       new_serial.irq = 9;
-
-               if (change_irq) {
-                       current_async = ports;
-
-                       while (current_async) {
-                               if ((current_async->line >= info->line) &&
-                                   (current_async->line < (info->line + 8))) {
-                                       if (current_async == info) {
-                                               if (current_async->port.count > 1)
-                                                       return -EBUSY;
-                                       } else if (current_async->port.count)
-                                               return -EBUSY;
-                               }
-
-                               current_async = current_async->next_port;
-                       }
-               }
-
-               /*
-                * OK, past this point, all the error checking has been done.
-                * At this point, we start making changes.....
-                */
-
-               info->port.flags = ((info->port.flags & ~ASYNC_FLAGS) |
-                              (new_serial.flags & ASYNC_FLAGS));
-               info->custom_divisor = new_serial.custom_divisor;
-               info->close_delay = new_serial.close_delay * HZ/100;
-               info->closing_wait = new_serial.closing_wait * HZ/100;
-
-               if (change_irq) {
-                       /*
-                        * We need to shutdown the serial port at the old
-                        * port/irq combination.
-                        */
-                       shutdown(info);
-
-                       current_async = ports;
-
-                       while (current_async) {
-                               if ((current_async->line >= info->line) &&
-                                   (current_async->line < (info->line + 8)))
-                                       current_async->irq = new_serial.irq;
-
-                               current_async = current_async->next_port;
-                       }
-
-                       serial_out(info, UART_ESI_CMD1, ESI_SET_ENH_IRQ);
-                       if (info->irq == 9)
-                               serial_out(info, UART_ESI_CMD2, 0x02);
-                       else
-                               serial_out(info, UART_ESI_CMD2, info->irq);
-               }
-       }
-
-       if (info->port.flags & ASYNC_INITIALIZED) {
-               if (((old_info.port.flags & ASYNC_SPD_MASK) !=
-                    (info->port.flags & ASYNC_SPD_MASK)) ||
-                   (old_info.custom_divisor != info->custom_divisor)) {
-                       if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
-                               info->port.tty->alt_speed = 57600;
-                       if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
-                               info->port.tty->alt_speed = 115200;
-                       if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
-                               info->port.tty->alt_speed = 230400;
-                       if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
-                               info->port.tty->alt_speed = 460800;
-                       change_speed(info);
-               }
-       } else
-               retval = startup(info);
-
-       return retval;
-}
-
-static int set_esp_config(struct esp_struct *info,
-                         struct hayes_esp_config __user *new_info)
-{
-       struct hayes_esp_config new_config;
-       unsigned int change_dma;
-       int retval = 0;
-       struct esp_struct *current_async;
-       unsigned long flags;
-
-       /* Perhaps a non-sysadmin user should be able to do some of these */
-       /* operations.  I haven't decided yet. */
-
-       if (!capable(CAP_SYS_ADMIN))
-               return -EPERM;
-
-       if (copy_from_user(&new_config, new_info, sizeof(new_config)))
-               return -EFAULT;
-
-       if ((new_config.flow_on >= new_config.flow_off) ||
-           (new_config.rx_trigger < 1) ||
-           (new_config.tx_trigger < 1) ||
-           (new_config.flow_off < 1) ||
-           (new_config.flow_on < 1) ||
-           (new_config.rx_trigger > 1023) ||
-           (new_config.tx_trigger > 1023) ||
-           (new_config.flow_off > 1023) ||
-           (new_config.flow_on > 1023) ||
-           (new_config.pio_threshold < 0) ||
-           (new_config.pio_threshold > 1024))
-               return -EINVAL;
-
-       if ((new_config.dma_channel != 1) && (new_config.dma_channel != 3))
-               new_config.dma_channel = 0;
-
-       if (info->stat_flags & ESP_STAT_NEVER_DMA)
-               change_dma = new_config.dma_channel;
-       else
-               change_dma = (new_config.dma_channel != dma);
-
-       if (change_dma) {
-               if (new_config.dma_channel) {
-                       /* PIO mode to DMA mode transition OR */
-                       /* change current DMA channel */
-                       current_async = ports;
-
-                       while (current_async) {
-                               if (current_async == info) {
-                                       if (current_async->port.count > 1)
-                                               return -EBUSY;
-                               } else if (current_async->port.count)
-                                       return -EBUSY;
-
-                               current_async = current_async->next_port;
-                       }
-
-                       shutdown(info);
-                       dma = new_config.dma_channel;
-                       info->stat_flags &= ~ESP_STAT_NEVER_DMA;
-
-                       /* all ports must use the same DMA channel */
-
-                       spin_lock_irqsave(&info->lock, flags);
-                       current_async = ports;
-
-                       while (current_async) {
-                               esp_basic_init(current_async);
-                               current_async = current_async->next_port;
-                       }
-                       spin_unlock_irqrestore(&info->lock, flags);
-               } else {
-                       /* DMA mode to PIO mode only */
-                       if (info->port.count > 1)
-                               return -EBUSY;
-
-                       shutdown(info);
-                       spin_lock_irqsave(&info->lock, flags);
-                       info->stat_flags |= ESP_STAT_NEVER_DMA;
-                       esp_basic_init(info);
-                       spin_unlock_irqrestore(&info->lock, flags);
-               }
-       }
-
-       info->config.pio_threshold = new_config.pio_threshold;
-
-       if ((new_config.flow_off != info->config.flow_off) ||
-           (new_config.flow_on != info->config.flow_on)) {
-               info->config.flow_off = new_config.flow_off;
-               info->config.flow_on = new_config.flow_on;
-
-               spin_lock_irqsave(&info->lock, flags);
-               serial_out(info, UART_ESI_CMD1, ESI_SET_FLOW_LVL);
-               serial_out(info, UART_ESI_CMD2, new_config.flow_off >> 8);
-               serial_out(info, UART_ESI_CMD2, new_config.flow_off);
-               serial_out(info, UART_ESI_CMD2, new_config.flow_on >> 8);
-               serial_out(info, UART_ESI_CMD2, new_config.flow_on);
-               spin_unlock_irqrestore(&info->lock, flags);
-       }
-
-       if ((new_config.rx_trigger != info->config.rx_trigger) ||
-           (new_config.tx_trigger != info->config.tx_trigger)) {
-               info->config.rx_trigger = new_config.rx_trigger;
-               info->config.tx_trigger = new_config.tx_trigger;
-               spin_lock_irqsave(&info->lock, flags);
-               serial_out(info, UART_ESI_CMD1, ESI_SET_TRIGGER);
-               serial_out(info, UART_ESI_CMD2,
-                          new_config.rx_trigger >> 8);
-               serial_out(info, UART_ESI_CMD2, new_config.rx_trigger);
-               serial_out(info, UART_ESI_CMD2,
-                          new_config.tx_trigger >> 8);
-               serial_out(info, UART_ESI_CMD2, new_config.tx_trigger);
-               spin_unlock_irqrestore(&info->lock, flags);
-       }
-
-       if (new_config.rx_timeout != info->config.rx_timeout) {
-               info->config.rx_timeout = new_config.rx_timeout;
-               spin_lock_irqsave(&info->lock, flags);
-
-               if (info->IER & UART_IER_RDI) {
-                       serial_out(info, UART_ESI_CMD1,
-                                  ESI_SET_RX_TIMEOUT);
-                       serial_out(info, UART_ESI_CMD2,
-                                  new_config.rx_timeout);
-               }
-
-               spin_unlock_irqrestore(&info->lock, flags);
-       }
-
-       if (!(info->port.flags & ASYNC_INITIALIZED))
-               retval = startup(info);
-
-       return retval;
-}
-
-/*
- * get_lsr_info - get line status register info
- *
- * Purpose: Let user call ioctl() to get info when the UART physically
- *         is emptied.  On bus types like RS485, the transmitter must
- *         release the bus after transmitting. This must be done when
- *         the transmit shift register is empty, not be done when the
- *         transmit holding register is empty.  This functionality
- *         allows an RS485 driver to be written in user space.
- */
-static int get_lsr_info(struct esp_struct *info, unsigned int __user *value)
-{
-       unsigned char status;
-       unsigned int result;
-       unsigned long flags;
-
-       spin_lock_irqsave(&info->lock, flags);
-       serial_out(info, UART_ESI_CMD1, ESI_GET_UART_STAT);
-       status = serial_in(info, UART_ESI_STAT1);
-       spin_unlock_irqrestore(&info->lock, flags);
-       result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
-       return put_user(result, value);
-}
-
-
-static int esp_tiocmget(struct tty_struct *tty, struct file *file)
-{
-       struct esp_struct *info = tty->driver_data;
-       unsigned char control, status;
-       unsigned long flags;
-
-       if (serial_paranoia_check(info, tty->name, __func__))
-               return -ENODEV;
-       if (tty->flags & (1 << TTY_IO_ERROR))
-               return -EIO;
-
-       control = info->MCR;
-
-       spin_lock_irqsave(&info->lock, flags);
-       serial_out(info, UART_ESI_CMD1, ESI_GET_UART_STAT);
-       status = serial_in(info, UART_ESI_STAT2);
-       spin_unlock_irqrestore(&info->lock, flags);
-
-       return    ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
-               | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
-               | ((status  & UART_MSR_DCD) ? TIOCM_CAR : 0)
-               | ((status  & UART_MSR_RI) ? TIOCM_RNG : 0)
-               | ((status  & UART_MSR_DSR) ? TIOCM_DSR : 0)
-               | ((status  & UART_MSR_CTS) ? TIOCM_CTS : 0);
-}
-
-static int esp_tiocmset(struct tty_struct *tty, struct file *file,
-                       unsigned int set, unsigned int clear)
-{
-       struct esp_struct *info = tty->driver_data;
-       unsigned long flags;
-
-       if (serial_paranoia_check(info, tty->name, __func__))
-               return -ENODEV;
-       if (tty->flags & (1 << TTY_IO_ERROR))
-               return -EIO;
-
-       spin_lock_irqsave(&info->lock, flags);
-
-       if (set & TIOCM_RTS)
-               info->MCR |= UART_MCR_RTS;
-       if (set & TIOCM_DTR)
-               info->MCR |= UART_MCR_DTR;
-
-       if (clear & TIOCM_RTS)
-               info->MCR &= ~UART_MCR_RTS;
-       if (clear & TIOCM_DTR)
-               info->MCR &= ~UART_MCR_DTR;
-
-       serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART);
-       serial_out(info, UART_ESI_CMD2, UART_MCR);
-       serial_out(info, UART_ESI_CMD2, info->MCR);
-
-       spin_unlock_irqrestore(&info->lock, flags);
-       return 0;
-}
-
-/*
- * rs_break() --- routine which turns the break handling on or off
- */
-static int esp_break(struct tty_struct *tty, int break_state)
-{
-       struct esp_struct *info = tty->driver_data;
-       unsigned long flags;
-
-       if (serial_paranoia_check(info, tty->name, "esp_break"))
-               return -EINVAL;
-
-       if (break_state == -1) {
-               spin_lock_irqsave(&info->lock, flags);
-               serial_out(info, UART_ESI_CMD1, ESI_ISSUE_BREAK);
-               serial_out(info, UART_ESI_CMD2, 0x01);
-               spin_unlock_irqrestore(&info->lock, flags);
-
-               /* FIXME - new style wait needed here */
-               interruptible_sleep_on(&info->break_wait);
-       } else {
-               spin_lock_irqsave(&info->lock, flags);
-               serial_out(info, UART_ESI_CMD1, ESI_ISSUE_BREAK);
-               serial_out(info, UART_ESI_CMD2, 0x00);
-               spin_unlock_irqrestore(&info->lock, flags);
-       }
-       return 0;
-}
-
-static int rs_ioctl(struct tty_struct *tty, struct file *file,
-                   unsigned int cmd, unsigned long arg)
-{
-       struct esp_struct *info = tty->driver_data;
-       struct async_icount cprev, cnow;        /* kernel counter temps */
-       struct serial_icounter_struct __user *p_cuser;  /* user space */
-       void __user *argp = (void __user *)arg;
-       unsigned long flags;
-       int ret;
-
-       if (serial_paranoia_check(info, tty->name, "rs_ioctl"))
-               return -ENODEV;
-
-       if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
-           (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGWILD)  &&
-           (cmd != TIOCSERSWILD) && (cmd != TIOCSERGSTRUCT) &&
-           (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT) &&
-           (cmd != TIOCGHAYESESP) && (cmd != TIOCSHAYESESP)) {
-               if (tty->flags & (1 << TTY_IO_ERROR))
-                   return -EIO;
-       }
-
-       switch (cmd) {
-       case TIOCGSERIAL:
-               return get_serial_info(info, argp);
-       case TIOCSSERIAL:
-               lock_kernel();
-               ret = set_serial_info(info, argp);
-               unlock_kernel();
-               return ret;
-       case TIOCSERGWILD:
-               return put_user(0L, (unsigned long __user *)argp);
-       case TIOCSERGETLSR: /* Get line status register */
-               return get_lsr_info(info, argp);
-       case TIOCSERSWILD:
-               if (!capable(CAP_SYS_ADMIN))
-                       return -EPERM;
-               return 0;
-       /*
-        * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
-        * - mask passed in arg for lines of interest
-        *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
-        * Caller should use TIOCGICOUNT to see which one it was
-        */
-       case TIOCMIWAIT:
-               spin_lock_irqsave(&info->lock, flags);
-               cprev = info->icount;   /* note the counters on entry */
-               spin_unlock_irqrestore(&info->lock, flags);
-               while (1) {
-                       /* FIXME: convert to new style wakeup */
-                       interruptible_sleep_on(&info->port.delta_msr_wait);
-                       /* see if a signal did it */
-                       if (signal_pending(current))
-                               return -ERESTARTSYS;
-                       spin_lock_irqsave(&info->lock, flags);
-                       cnow = info->icount;    /* atomic copy */
-                       spin_unlock_irqrestore(&info->lock, flags);
-                       if (cnow.rng == cprev.rng &&
-                           cnow.dsr == cprev.dsr &&
-                           cnow.dcd == cprev.dcd &&
-                           cnow.cts == cprev.cts)
-                               return -EIO; /* no change => error */
-                       if (((arg & TIOCM_RNG) &&
-                            (cnow.rng != cprev.rng)) ||
-                            ((arg & TIOCM_DSR) &&
-                             (cnow.dsr != cprev.dsr)) ||
-                            ((arg & TIOCM_CD) &&
-                             (cnow.dcd != cprev.dcd)) ||
-                            ((arg & TIOCM_CTS) &&
-                             (cnow.cts != cprev.cts))) {
-                               return 0;
-                       }
-                       cprev = cnow;
-               }
-               /* NOTREACHED */
-       /*
-        * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
-        * Return: write counters to the user passed counter struct
-        * NB: both 1->0 and 0->1 transitions are counted except for
-        *     RI where only 0->1 is counted.
-        */
-       case TIOCGICOUNT:
-               spin_lock_irqsave(&info->lock, flags);
-               cnow = info->icount;
-               spin_unlock_irqrestore(&info->lock, flags);
-               p_cuser = argp;
-               if (put_user(cnow.cts, &p_cuser->cts) ||
-                   put_user(cnow.dsr, &p_cuser->dsr) ||
-                   put_user(cnow.rng, &p_cuser->rng) ||
-                   put_user(cnow.dcd, &p_cuser->dcd))
-                       return -EFAULT;
-                       return 0;
-       case TIOCGHAYESESP:
-               return get_esp_config(info, argp);
-       case TIOCSHAYESESP:
-               lock_kernel();
-               ret = set_esp_config(info, argp);
-               unlock_kernel();
-               return ret;
-       default:
-               return -ENOIOCTLCMD;
-       }
-       return 0;
-}
-
-static void rs_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
-{
-       struct esp_struct *info = tty->driver_data;
-       unsigned long flags;
-
-       change_speed(info);
-
-       spin_lock_irqsave(&info->lock, flags);
-
-       /* Handle transition to B0 status */
-       if ((old_termios->c_cflag & CBAUD) &&
-               !(tty->termios->c_cflag & CBAUD)) {
-               info->MCR &= ~(UART_MCR_DTR|UART_MCR_RTS);
-               serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART);
-               serial_out(info, UART_ESI_CMD2, UART_MCR);
-               serial_out(info, UART_ESI_CMD2, info->MCR);
-       }
-
-       /* Handle transition away from B0 status */
-       if (!(old_termios->c_cflag & CBAUD) &&
-               (tty->termios->c_cflag & CBAUD)) {
-               info->MCR |= (UART_MCR_DTR | UART_MCR_RTS);
-               serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART);
-               serial_out(info, UART_ESI_CMD2, UART_MCR);
-               serial_out(info, UART_ESI_CMD2, info->MCR);
-       }
-
-       spin_unlock_irqrestore(&info->lock, flags);
-
-       /* Handle turning of CRTSCTS */
-       if ((old_termios->c_cflag & CRTSCTS) &&
-           !(tty->termios->c_cflag & CRTSCTS)) {
-               rs_start(tty);
-       }
-}
-
-/*
- * ------------------------------------------------------------
- * rs_close()
- *
- * This routine is called when the serial port gets closed.  First, we
- * wait for the last remaining data to be sent.  Then, we unlink its
- * async structure from the interrupt chain if necessary, and we free
- * that IRQ if nothing is left in the chain.
- * ------------------------------------------------------------
- */
-static void rs_close(struct tty_struct *tty, struct file *filp)
-{
-       struct esp_struct *info = tty->driver_data;
-       unsigned long flags;
-
-       if (!info || serial_paranoia_check(info, tty->name, "rs_close"))
-               return;
-
-       spin_lock_irqsave(&info->lock, flags);
-
-       if (tty_hung_up_p(filp)) {
-               DBG_CNT("before DEC-hung");
-               goto out;
-       }
-
-#ifdef SERIAL_DEBUG_OPEN
-       printk(KERN_DEBUG "rs_close ttys%d, count = %d\n",
-                                               info->line, info->port.count);
-#endif
-       if (tty->count == 1 && info->port.count != 1) {
-               /*
-                * Uh, oh.  tty->count is 1, which means that the tty
-                * structure will be freed.  Info->count should always
-                * be one in these conditions.  If it's greater than
-                * one, we've got real problems, since it means the
-                * serial port won't be shutdown.
-                */
-               printk(KERN_DEBUG "rs_close: bad serial port count; tty->count is 1, info->port.count is %d\n", info->port.count);
-               info->port.count = 1;
-       }
-       if (--info->port.count < 0) {
-               printk(KERN_ERR "rs_close: bad serial port count for ttys%d: %d\n",
-                      info->line, info->port.count);
-               info->port.count = 0;
-       }
-       if (info->port.count) {
-               DBG_CNT("before DEC-2");
-               goto out;
-       }
-       info->port.flags |= ASYNC_CLOSING;
-
-       spin_unlock_irqrestore(&info->lock, flags);
-       /*
-        * 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 (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
-               tty_wait_until_sent(tty, info->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.
-        */
-       /* info->IER &= ~UART_IER_RLSI; */
-       info->IER &= ~UART_IER_RDI;
-       info->read_status_mask &= ~UART_LSR_DR;
-       if (info->port.flags & ASYNC_INITIALIZED) {
-
-               spin_lock_irqsave(&info->lock, flags);
-               serial_out(info, UART_ESI_CMD1, ESI_SET_SRV_MASK);
-               serial_out(info, UART_ESI_CMD2, info->IER);
-
-               /* disable receive timeout */
-               serial_out(info, UART_ESI_CMD1, ESI_SET_RX_TIMEOUT);
-               serial_out(info, UART_ESI_CMD2, 0x00);
-
-               spin_unlock_irqrestore(&info->lock, flags);
-
-               /*
-                * Before we drop DTR, make sure the UART transmitter
-                * has completely drained; this is especially
-                * important if there is a transmit FIFO!
-                */
-               rs_wait_until_sent(tty, info->timeout);
-       }
-       shutdown(info);
-       rs_flush_buffer(tty);
-       tty_ldisc_flush(tty);
-       tty->closing = 0;
-       info->port.tty = NULL;
-
-       if (info->port.blocked_open) {
-               if (info->close_delay)
-                       msleep_interruptible(jiffies_to_msecs(info->close_delay));
-               wake_up_interruptible(&info->port.open_wait);
-       }
-       info->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
-       wake_up_interruptible(&info->port.close_wait);
-       return;
-
-out:
-       spin_unlock_irqrestore(&info->lock, flags);
-}
-
-static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
-{
-       struct esp_struct *info = tty->driver_data;
-       unsigned long orig_jiffies, char_time;
-       unsigned long flags;
-
-       if (serial_paranoia_check(info, tty->name, "rs_wait_until_sent"))
-               return;
-
-       orig_jiffies = jiffies;
-       char_time = ((info->timeout - HZ / 50) / 1024) / 5;
-
-       if (!char_time)
-               char_time = 1;
-
-       spin_lock_irqsave(&info->lock, flags);
-       serial_out(info, UART_ESI_CMD1, ESI_NO_COMMAND);
-       serial_out(info, UART_ESI_CMD1, ESI_GET_TX_AVAIL);
-
-       while ((serial_in(info, UART_ESI_STAT1) != 0x03) ||
-               (serial_in(info, UART_ESI_STAT2) != 0xff)) {
-
-               spin_unlock_irqrestore(&info->lock, flags);
-               msleep_interruptible(jiffies_to_msecs(char_time));
-
-               if (signal_pending(current))
-                       return;
-
-               if (timeout && time_after(jiffies, orig_jiffies + timeout))
-                       return;
-
-               spin_lock_irqsave(&info->lock, flags);
-               serial_out(info, UART_ESI_CMD1, ESI_NO_COMMAND);
-               serial_out(info, UART_ESI_CMD1, ESI_GET_TX_AVAIL);
-       }
-       spin_unlock_irqrestore(&info->lock, flags);
-       set_current_state(TASK_RUNNING);
-}
-
-/*
- * esp_hangup() --- called by tty_hangup() when a hangup is signaled.
- */
-static void esp_hangup(struct tty_struct *tty)
-{
-       struct esp_struct *info = tty->driver_data;
-
-       if (serial_paranoia_check(info, tty->name, "esp_hangup"))
-               return;
-
-       rs_flush_buffer(tty);
-       shutdown(info);
-       info->port.count = 0;
-       info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
-       info->port.tty = NULL;
-       wake_up_interruptible(&info->port.open_wait);
-}
-
-static int esp_carrier_raised(struct tty_port *port)
-{
-       struct esp_struct *info = container_of(port, struct esp_struct, port);
-       serial_out(info, UART_ESI_CMD1, ESI_GET_UART_STAT);
-       if (serial_in(info, UART_ESI_STAT2) & UART_MSR_DCD)
-               return 1;
-       return 0;
-}
-
-/*
- * ------------------------------------------------------------
- * esp_open() and friends
- * ------------------------------------------------------------
- */
-static int block_til_ready(struct tty_struct *tty, struct file *filp,
-                          struct esp_struct *info)
-{
-       DECLARE_WAITQUEUE(wait, current);
-       int             retval;
-       int             do_clocal = 0;
-       unsigned long   flags;
-       int             cd;
-       struct tty_port *port = &info->port;
-
-       /*
-        * 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)) {
-               if (port->flags & ASYNC_CLOSING)
-                       interruptible_sleep_on(&port->close_wait);
-#ifdef SERIAL_DO_RESTART
-               if (port->flags & ASYNC_HUP_NOTIFY)
-                       return -EAGAIN;
-               else
-                       return -ERESTARTSYS;
-#else
-               return -EAGAIN;
-#endif
-       }
-
-       /*
-        * 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 (tty->termios->c_cflag & CLOCAL)
-               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, port->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);
-#ifdef SERIAL_DEBUG_OPEN
-       printk(KERN_DEBUG "block_til_ready before block: ttys%d, count = %d\n",
-              info->line, port->count);
-#endif
-       spin_lock_irqsave(&info->lock, flags);
-       if (!tty_hung_up_p(filp))
-               port->count--;
-       port->blocked_open++;
-       while (1) {
-               if ((tty->termios->c_cflag & CBAUD)) {
-                       unsigned int scratch;
-
-                       serial_out(info, UART_ESI_CMD1, ESI_READ_UART);
-                       serial_out(info, UART_ESI_CMD2, UART_MCR);
-                       scratch = serial_in(info, UART_ESI_STAT1);
-                       serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART);
-                       serial_out(info, UART_ESI_CMD2, UART_MCR);
-                       serial_out(info, UART_ESI_CMD2,
-                               scratch | UART_MCR_DTR | UART_MCR_RTS);
-               }
-               set_current_state(TASK_INTERRUPTIBLE);
-               if (tty_hung_up_p(filp) ||
-                   !(port->flags & ASYNC_INITIALIZED)) {
-#ifdef SERIAL_DO_RESTART
-                       if (port->flags & ASYNC_HUP_NOTIFY)
-                               retval = -EAGAIN;
-                       else
-                               retval = -ERESTARTSYS;
-#else
-                       retval = -EAGAIN;
-#endif
-                       break;
-               }
-
-               cd = tty_port_carrier_raised(port);
-
-               if (!(port->flags & ASYNC_CLOSING) &&
-                   (do_clocal))
-                       break;
-               if (signal_pending(current)) {
-                       retval = -ERESTARTSYS;
-                       break;
-               }
-#ifdef SERIAL_DEBUG_OPEN
-               printk(KERN_DEBUG "block_til_ready blocking: ttys%d, count = %d\n",
-                      info->line, port->count);
-#endif
-               spin_unlock_irqrestore(&info->lock, flags);
-               schedule();
-               spin_lock_irqsave(&info->lock, flags);
-       }
-       set_current_state(TASK_RUNNING);
-       remove_wait_queue(&port->open_wait, &wait);
-       if (!tty_hung_up_p(filp))
-               port->count++;
-       port->blocked_open--;
-       spin_unlock_irqrestore(&info->lock, flags);
-#ifdef SERIAL_DEBUG_OPEN
-       printk(KERN_DEBUG "block_til_ready after blocking: ttys%d, count = %d\n",
-              info->line, port->count);
-#endif
-       if (retval)
-               return retval;
-       port->flags |= ASYNC_NORMAL_ACTIVE;
-       return 0;
-}
-
-/*
- * This routine is called whenever a serial port is opened.  It
- * enables interrupts for a serial port, linking in its async structure into
- * the IRQ chain.   It also performs the serial-specific
- * initialization for the tty structure.
- */
-static int esp_open(struct tty_struct *tty, struct file *filp)
-{
-       struct esp_struct       *info;
-       int                     retval, line;
-       unsigned long           flags;
-
-       line = tty->index;
-       if ((line < 0) || (line >= NR_PORTS))
-               return -ENODEV;
-
-       /* find the port in the chain */
-
-       info = ports;
-
-       while (info && (info->line != line))
-               info = info->next_port;
-
-       if (!info) {
-               serial_paranoia_check(info, tty->name, "esp_open");
-               return -ENODEV;
-       }
-
-#ifdef SERIAL_DEBUG_OPEN
-       printk(KERN_DEBUG "esp_open %s, count = %d\n", tty->name, info->port.count);
-#endif
-       spin_lock_irqsave(&info->lock, flags);
-       info->port.count++;
-       tty->driver_data = info;
-       info->port.tty = tty;
-
-       spin_unlock_irqrestore(&info->lock, flags);
-
-       /*
-        * Start up serial port
-        */
-       retval = startup(info);
-       if (retval)
-               return retval;
-
-       retval = block_til_ready(tty, filp, info);
-       if (retval) {
-#ifdef SERIAL_DEBUG_OPEN
-               printk(KERN_DEBUG "esp_open returning after block_til_ready with %d\n",
-                      retval);
-#endif
-               return retval;
-       }
-#ifdef SERIAL_DEBUG_OPEN
-       printk(KERN_DEBUG "esp_open %s successful...", tty->name);
-#endif
-       return 0;
-}
-
-/*
- * ---------------------------------------------------------------------
- * espserial_init() and friends
- *
- * espserial_init() is called at boot-time to initialize the serial driver.
- * ---------------------------------------------------------------------
- */
-
-/*
- * This routine prints out the appropriate serial driver version
- * number, and identifies which options were configured into this
- * driver.
- */
-
-static void __init show_serial_version(void)
-{
-       printk(KERN_INFO "%s version %s (DMA %u)\n",
-               serial_name, serial_version, dma);
-}
-
-/*
- * This routine is called by espserial_init() to initialize a specific serial
- * port.
- */
-static int autoconfig(struct esp_struct *info)
-{
-       int port_detected = 0;
-       unsigned long flags;
-
-       if (!request_region(info->io_port, REGION_SIZE, "esp serial"))
-               return -EIO;
-
-       spin_lock_irqsave(&info->lock, flags);
-       /*
-        * Check for ESP card
-        */
-
-       if (serial_in(info, UART_ESI_BASE) == 0xf3) {
-               serial_out(info, UART_ESI_CMD1, 0x00);
-               serial_out(info, UART_ESI_CMD1, 0x01);
-
-               if ((serial_in(info, UART_ESI_STAT2) & 0x70) == 0x20) {
-                       port_detected = 1;
-
-                       if (!(info->irq)) {
-                               serial_out(info, UART_ESI_CMD1, 0x02);
-
-                               if (serial_in(info, UART_ESI_STAT1) & 0x01)
-                                       info->irq = 3;
-                               else
-                                       info->irq = 4;
-                       }
-
-
-                       /* put card in enhanced mode */
-                       /* this prevents access through */
-                       /* the "old" IO ports */
-                       esp_basic_init(info);
-
-                       /* clear out MCR */
-                       serial_out(info, UART_ESI_CMD1, ESI_WRITE_UART);
-                       serial_out(info, UART_ESI_CMD2, UART_MCR);
-                       serial_out(info, UART_ESI_CMD2, 0x00);
-               }
-       }
-       if (!port_detected)
-               release_region(info->io_port, REGION_SIZE);
-
-       spin_unlock_irqrestore(&info->lock, flags);
-       return (port_detected);
-}
-
-static const struct tty_operations esp_ops = {
-       .open = esp_open,
-       .close = rs_close,
-       .write = rs_write,
-       .put_char = rs_put_char,
-       .flush_chars = rs_flush_chars,
-       .write_room = rs_write_room,
-       .chars_in_buffer = rs_chars_in_buffer,
-       .flush_buffer = rs_flush_buffer,
-       .ioctl = rs_ioctl,
-       .throttle = rs_throttle,
-       .unthrottle = rs_unthrottle,
-       .set_termios = rs_set_termios,
-       .stop = rs_stop,
-       .start = rs_start,
-       .hangup = esp_hangup,
-       .break_ctl = esp_break,
-       .wait_until_sent = rs_wait_until_sent,
-       .tiocmget = esp_tiocmget,
-       .tiocmset = esp_tiocmset,
-};
-
-static const struct tty_port_operations esp_port_ops = {
-       .esp_carrier_raised,
-};
-
-/*
- * The serial driver boot-time initialization code!
- */
-static int __init espserial_init(void)
-{
-       int i, offset;
-       struct esp_struct *info;
-       struct esp_struct *last_primary = NULL;
-       int esp[] = { 0x100, 0x140, 0x180, 0x200, 0x240, 0x280, 0x300, 0x380 };
-
-       esp_driver = alloc_tty_driver(NR_PORTS);
-       if (!esp_driver)
-               return -ENOMEM;
-
-       for (i = 0; i < NR_PRIMARY; i++) {
-               if (irq[i] != 0) {
-                       if ((irq[i] < 2) || (irq[i] > 15) || (irq[i] == 6) ||
-                           (irq[i] == 8) || (irq[i] == 13))
-                               irq[i] = 0;
-                       else if (irq[i] == 2)
-                               irq[i] = 9;
-               }
-       }
-
-       if ((dma != 1) && (dma != 3))
-               dma = 0;
-
-       if ((rx_trigger < 1) || (rx_trigger > 1023))
-               rx_trigger = 768;
-
-       if ((tx_trigger < 1) || (tx_trigger > 1023))
-               tx_trigger = 768;
-
-       if ((flow_off < 1) || (flow_off > 1023))
-               flow_off = 1016;
-
-       if ((flow_on < 1) || (flow_on > 1023))
-               flow_on = 944;
-
-       if ((rx_timeout < 0) || (rx_timeout > 255))
-               rx_timeout = 128;
-
-       if (flow_on >= flow_off)
-               flow_on = flow_off - 1;
-
-       show_serial_version();
-
-       /* Initialize the tty_driver structure */
-
-       esp_driver->owner = THIS_MODULE;
-       esp_driver->name = "ttyP";
-       esp_driver->major = ESP_IN_MAJOR;
-       esp_driver->minor_start = 0;
-       esp_driver->type = TTY_DRIVER_TYPE_SERIAL;
-       esp_driver->subtype = SERIAL_TYPE_NORMAL;
-       esp_driver->init_termios = tty_std_termios;
-       esp_driver->init_termios.c_cflag =
-               B9600 | CS8 | CREAD | HUPCL | CLOCAL;
-       esp_driver->init_termios.c_ispeed = 9600;
-       esp_driver->init_termios.c_ospeed = 9600;
-       esp_driver->flags = TTY_DRIVER_REAL_RAW;
-       tty_set_operations(esp_driver, &esp_ops);
-       if (tty_register_driver(esp_driver)) {
-               printk(KERN_ERR "Couldn't register esp serial driver");
-               put_tty_driver(esp_driver);
-               return 1;
-       }
-
-       info = kzalloc(sizeof(struct esp_struct), GFP_KERNEL);
-
-       if (!info) {
-               printk(KERN_ERR "Couldn't allocate memory for esp serial device information\n");
-               tty_unregister_driver(esp_driver);
-               put_tty_driver(esp_driver);
-               return 1;
-       }
-
-       spin_lock_init(&info->lock);
-       /* rx_trigger, tx_trigger are needed by autoconfig */
-       info->config.rx_trigger = rx_trigger;
-       info->config.tx_trigger = tx_trigger;
-
-       i = 0;
-       offset = 0;
-
-       do {
-               tty_port_init(&info->port);
-               info->port.ops = &esp_port_ops;
-               info->io_port = esp[i] + offset;
-               info->irq = irq[i];
-               info->line = (i * 8) + (offset / 8);
-
-               if (!autoconfig(info)) {
-                       i++;
-                       offset = 0;
-                       continue;
-               }
-
-               info->custom_divisor = (divisor[i] >> (offset / 2)) & 0xf;
-               info->port.flags = STD_COM_FLAGS;
-               if (info->custom_divisor)
-                       info->port.flags |= ASYNC_SPD_CUST;
-               info->magic = ESP_MAGIC;
-               info->close_delay = 5*HZ/10;
-               info->closing_wait = 30*HZ;
-               info->config.rx_timeout = rx_timeout;
-               info->config.flow_on = flow_on;
-               info->config.flow_off = flow_off;
-               info->config.pio_threshold = pio_threshold;
-               info->next_port = ports;
-               init_waitqueue_head(&info->break_wait);
-               ports = info;
-               printk(KERN_INFO "ttyP%d at 0x%04x (irq = %d) is an ESP ",
-                       info->line, info->io_port, info->irq);
-
-               if (info->line % 8) {
-                       printk("secondary port\n");
-                       /* 8 port cards can't do DMA */
-                       info->stat_flags |= ESP_STAT_NEVER_DMA;
-
-                       if (last_primary)
-                               last_primary->stat_flags |= ESP_STAT_NEVER_DMA;
-               } else {
-                       printk("primary port\n");
-                       last_primary = info;
-                       irq[i] = info->irq;
-               }
-
-               if (!dma)
-                       info->stat_flags |= ESP_STAT_NEVER_DMA;
-
-               info = kzalloc(sizeof(struct esp_struct), GFP_KERNEL);
-               if (!info) {
-                       printk(KERN_ERR "Couldn't allocate memory for esp serial device information\n");
-                       /* allow use of the already detected ports */
-                       return 0;
-               }
-
-               spin_lock_init(&info->lock);
-               /* rx_trigger, tx_trigger are needed by autoconfig */
-               info->config.rx_trigger = rx_trigger;
-               info->config.tx_trigger = tx_trigger;
-
-               if (offset == 56) {
-                       i++;
-                       offset = 0;
-               } else {
-                       offset += 8;
-               }
-       } while (i < NR_PRIMARY);
-
-       /* free the last port memory allocation */
-       kfree(info);
-
-       return 0;
-}
-
-static void __exit espserial_exit(void)
-{
-       int e1;
-       struct esp_struct *temp_async;
-       struct esp_pio_buffer *pio_buf;
-
-       e1 = tty_unregister_driver(esp_driver);
-       if (e1)
-               printk(KERN_ERR "esp: failed to unregister driver (%d)\n", e1);
-       put_tty_driver(esp_driver);
-
-       while (ports) {
-               if (ports->io_port)
-                       release_region(ports->io_port, REGION_SIZE);
-               temp_async = ports->next_port;
-               kfree(ports);
-               ports = temp_async;
-       }
-
-       if (dma_buffer)
-               free_pages((unsigned long)dma_buffer,
-                       get_order(DMA_BUFFER_SZ));
-
-       while (free_pio_buf) {
-               pio_buf = free_pio_buf->next;
-               kfree(free_pio_buf);
-               free_pio_buf = pio_buf;
-       }
-}
-
-module_init(espserial_init);
-module_exit(espserial_exit);
index 5a53857..f72914d 100644 (file)
@@ -214,7 +214,6 @@ unifdef-y += futex.h
 unifdef-y += fs.h
 unifdef-y += gameport.h
 unifdef-y += generic_serial.h
-unifdef-y += hayesesp.h
 unifdef-y += hdlcdrv.h
 unifdef-y += hdlc.h
 unifdef-y += hdreg.h
diff --git a/include/linux/hayesesp.h b/include/linux/hayesesp.h
deleted file mode 100644 (file)
index 92b08cf..0000000
+++ /dev/null
@@ -1,114 +0,0 @@
-#ifndef HAYESESP_H
-#define HAYESESP_H
-
-struct hayes_esp_config {
-       short flow_on;
-       short flow_off;
-       short rx_trigger;
-       short tx_trigger;
-       short pio_threshold;
-       unsigned char rx_timeout;
-       char dma_channel;
-};
-
-#ifdef __KERNEL__
-
-#define ESP_DMA_CHANNEL   0
-#define ESP_RX_TRIGGER    768
-#define ESP_TX_TRIGGER    768
-#define ESP_FLOW_OFF      1016
-#define ESP_FLOW_ON       944
-#define ESP_RX_TMOUT      128
-#define ESP_PIO_THRESHOLD 32
-
-#define ESP_IN_MAJOR   57      /* major dev # for dial in */
-#define ESP_OUT_MAJOR  58      /* major dev # for dial out */
-#define ESPC_SCALE     3
-#define UART_ESI_BASE  0x00
-#define UART_ESI_SID   0x01
-#define UART_ESI_RX    0x02
-#define UART_ESI_TX    0x02
-#define UART_ESI_CMD1  0x04
-#define UART_ESI_CMD2  0x05
-#define UART_ESI_STAT1 0x04
-#define UART_ESI_STAT2 0x05
-#define UART_ESI_RWS   0x07
-
-#define UART_IER_DMA_TMOUT     0x80
-#define UART_IER_DMA_TC                0x08
-
-#define ESI_SET_IRQ            0x04
-#define ESI_SET_DMA_TMOUT      0x05
-#define ESI_SET_SRV_MASK       0x06
-#define ESI_SET_ERR_MASK       0x07
-#define ESI_SET_FLOW_CNTL      0x08
-#define ESI_SET_FLOW_CHARS     0x09
-#define ESI_SET_FLOW_LVL       0x0a
-#define ESI_SET_TRIGGER                0x0b
-#define ESI_SET_RX_TIMEOUT     0x0c
-#define ESI_SET_FLOW_TMOUT     0x0d
-#define ESI_WRITE_UART         0x0e
-#define ESI_READ_UART          0x0f
-#define ESI_SET_MODE           0x10
-#define ESI_GET_ERR_STAT       0x12
-#define ESI_GET_UART_STAT      0x13
-#define ESI_GET_RX_AVAIL       0x14
-#define ESI_GET_TX_AVAIL       0x15
-#define ESI_START_DMA_RX       0x16
-#define ESI_START_DMA_TX       0x17
-#define ESI_ISSUE_BREAK                0x1a
-#define ESI_FLUSH_RX           0x1b
-#define ESI_FLUSH_TX           0x1c
-#define ESI_SET_BAUD           0x1d
-#define ESI_SET_ENH_IRQ                0x1f
-#define ESI_SET_REINTR         0x20
-#define ESI_SET_PRESCALAR      0x23
-#define ESI_NO_COMMAND         0xff
-
-#define ESP_STAT_RX_TIMEOUT    0x01
-#define ESP_STAT_DMA_RX                0x02
-#define ESP_STAT_DMA_TX                0x04
-#define ESP_STAT_NEVER_DMA      0x08
-#define ESP_STAT_USE_PIO        0x10
-
-#define ESP_MAGIC              0x53ee
-#define ESP_XMIT_SIZE          4096
-
-struct esp_struct {
-       int                     magic;
-       struct tty_port         port;
-       spinlock_t              lock;
-       int                     io_port;
-       int                     irq;
-       int                     read_status_mask;
-       int                     ignore_status_mask;
-       int                     timeout;
-       int                     stat_flags;
-       int                     custom_divisor;
-       int                     close_delay;
-       unsigned short          closing_wait;
-       unsigned short          closing_wait2;
-       int                     IER;    /* Interrupt Enable Register */
-       int                     MCR;    /* Modem control register */
-       unsigned long           last_active;
-       int                     line;
-       unsigned char           *xmit_buf;
-       int                     xmit_head;
-       int                     xmit_tail;
-       int                     xmit_cnt;
-       wait_queue_head_t       break_wait;
-       struct async_icount     icount; /* kernel counters for the 4 input interrupts */
-       struct hayes_esp_config config; /* port configuration */
-       struct esp_struct       *next_port; /* For the linked list */
-};
-
-struct esp_pio_buffer {
-       unsigned char data[1024];
-       struct esp_pio_buffer *next;
-};
-
-#endif /* __KERNEL__ */
-
-
-#endif /* ESP_H */
-