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    From
    Subject[PATCH 10/58] tty: esp: remove broken driver
    Date
    From: Alan Cox <alan@linux.intel.com>

    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 | 154 ---
    drivers/char/Kconfig | 13 -
    drivers/char/Makefile | 1 -
    drivers/char/esp.c | 2533 ------------------------------------
    include/linux/Kbuild | 1 -
    include/linux/hayesesp.h | 114 --
    6 files changed, 0 insertions(+), 2816 deletions(-)
    delete mode 100644 Documentation/serial/hayes-esp.txt
    delete mode 100644 drivers/char/esp.c
    delete mode 100644 include/linux/hayesesp.h

    diff --git a/Documentation/serial/hayes-esp.txt b/Documentation/serial/hayes-esp.txt
    deleted file mode 100644
    index 09b5d58..0000000
    --- a/Documentation/serial/hayes-esp.txt
    +++ /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>
    diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
    index 6aad99e..6f31c94 100644
    --- a/drivers/char/Kconfig
    +++ b/drivers/char/Kconfig
    @@ -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)
    diff --git a/drivers/char/Makefile b/drivers/char/Makefile
    index 19a79dd..f957edf 100644
    --- a/drivers/char/Makefile
    +++ b/drivers/char/Makefile
    @@ -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
    index b19d43c..0000000
    --- a/drivers/char/esp.c
    +++ /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);
    diff --git a/include/linux/Kbuild b/include/linux/Kbuild
    index 5a53857..f72914d 100644
    --- a/include/linux/Kbuild
    +++ b/include/linux/Kbuild
    @@ -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
    index 92b08cf..0000000
    --- a/include/linux/hayesesp.h
    +++ /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 */
    -
    --
    1.6.5.5
    --
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