Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/serial/dz.c b/drivers/serial/dz.c
new file mode 100644
index 0000000..97824ee
--- /dev/null
+++ b/drivers/serial/dz.c
@@ -0,0 +1,822 @@
+/*
+ * dz.c: Serial port driver for DECStations equiped
+ * with the DZ chipset.
+ *
+ * Copyright (C) 1998 Olivier A. D. Lebaillif
+ *
+ * Email: olivier.lebaillif@ifrsys.com
+ *
+ * [31-AUG-98] triemer
+ * Changed IRQ to use Harald's dec internals interrupts.h
+ * removed base_addr code - moving address assignment to setup.c
+ * Changed name of dz_init to rs_init to be consistent with tc code
+ * [13-NOV-98] triemer fixed code to receive characters
+ * after patches by harald to irq code.
+ * [09-JAN-99] triemer minor fix for schedule - due to removal of timeout
+ * field from "current" - somewhere between 2.1.121 and 2.1.131
+ Qua Jun 27 15:02:26 BRT 2001
+ * [27-JUN-2001] Arnaldo Carvalho de Melo <acme@conectiva.com.br> - cleanups
+ *
+ * Parts (C) 1999 David Airlie, airlied@linux.ie
+ * [07-SEP-99] Bugfixes
+ *
+ * [06-Jan-2002] Russell King <rmk@arm.linux.org.uk>
+ * Converted to new serial core
+ */
+
+#undef DEBUG_DZ
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/console.h>
+#include <linux/tty.h>
+#include <linux/tty_flip.h>
+#include <linux/serial_core.h>
+#include <linux/serial.h>
+
+#include <asm/bootinfo.h>
+#include <asm/dec/interrupts.h>
+#include <asm/dec/kn01.h>
+#include <asm/dec/kn02.h>
+#include <asm/dec/machtype.h>
+#include <asm/dec/prom.h>
+#include <asm/irq.h>
+#include <asm/system.h>
+#include <asm/uaccess.h>
+
+#define CONSOLE_LINE (3) /* for definition of struct console */
+
+#include "dz.h"
+
+#define DZ_INTR_DEBUG 1
+
+static char *dz_name = "DECstation DZ serial driver version ";
+static char *dz_version = "1.02";
+
+struct dz_port {
+ struct uart_port port;
+ unsigned int cflag;
+};
+
+static struct dz_port dz_ports[DZ_NB_PORT];
+
+#ifdef DEBUG_DZ
+/*
+ * debugging code to send out chars via prom
+ */
+static void debug_console(const char *s, int count)
+{
+ unsigned i;
+
+ for (i = 0; i < count; i++) {
+ if (*s == 10)
+ prom_printf("%c", 13);
+ prom_printf("%c", *s++);
+ }
+}
+#endif
+
+/*
+ * ------------------------------------------------------------
+ * dz_in () and dz_out ()
+ *
+ * These routines are used to access the registers of the DZ
+ * chip, hiding relocation differences between implementation.
+ * ------------------------------------------------------------
+ */
+
+static inline unsigned short dz_in(struct dz_port *dport, unsigned offset)
+{
+ volatile unsigned short *addr =
+ (volatile unsigned short *) (dport->port.membase + offset);
+ return *addr;
+}
+
+static inline void dz_out(struct dz_port *dport, unsigned offset,
+ unsigned short value)
+{
+ volatile unsigned short *addr =
+ (volatile unsigned short *) (dport->port.membase + offset);
+ *addr = value;
+}
+
+/*
+ * ------------------------------------------------------------
+ * rs_stop () and rs_start ()
+ *
+ * These routines are called before setting or resetting
+ * tty->stopped. They enable or disable transmitter interrupts,
+ * as necessary.
+ * ------------------------------------------------------------
+ */
+
+static void dz_stop_tx(struct uart_port *uport, unsigned int tty_stop)
+{
+ struct dz_port *dport = (struct dz_port *)uport;
+ unsigned short tmp, mask = 1 << dport->port.line;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dport->port.lock, flags);
+ tmp = dz_in(dport, DZ_TCR); /* read the TX flag */
+ tmp &= ~mask; /* clear the TX flag */
+ dz_out(dport, DZ_TCR, tmp);
+ spin_unlock_irqrestore(&dport->port.lock, flags);
+}
+
+static void dz_start_tx(struct uart_port *uport, unsigned int tty_start)
+{
+ struct dz_port *dport = (struct dz_port *)uport;
+ unsigned short tmp, mask = 1 << dport->port.line;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dport->port.lock, flags);
+ tmp = dz_in(dport, DZ_TCR); /* read the TX flag */
+ tmp |= mask; /* set the TX flag */
+ dz_out(dport, DZ_TCR, tmp);
+ spin_unlock_irqrestore(&dport->port.lock, flags);
+}
+
+static void dz_stop_rx(struct uart_port *uport)
+{
+ struct dz_port *dport = (struct dz_port *)uport;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dport->port.lock, flags);
+ dport->cflag &= ~DZ_CREAD;
+ dz_out(dport, DZ_LPR, dport->cflag);
+ spin_unlock_irqrestore(&dport->port.lock, flags);
+}
+
+static void dz_enable_ms(struct uart_port *port)
+{
+ /* nothing to do */
+}
+
+/*
+ * ------------------------------------------------------------
+ * Here starts the interrupt handling routines. All of the
+ * following subroutines are declared as inline and are folded
+ * into dz_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:
+ *
+ * make drivers/serial/dz.s
+ *
+ * and look at the resulting assemble code in dz.s.
+ *
+ * ------------------------------------------------------------
+ */
+
+/*
+ * ------------------------------------------------------------
+ * receive_char ()
+ *
+ * This routine deals with inputs from any lines.
+ * ------------------------------------------------------------
+ */
+static inline void dz_receive_chars(struct dz_port *dport)
+{
+ struct tty_struct *tty = NULL;
+ struct uart_icount *icount;
+ int ignore = 0;
+ unsigned short status, tmp;
+ unsigned char ch, flag;
+
+ /* this code is going to be a problem...
+ the call to tty_flip_buffer is going to need
+ to be rethought...
+ */
+ do {
+ status = dz_in(dport, DZ_RBUF);
+
+ /* punt so we don't get duplicate characters */
+ if (!(status & DZ_DVAL))
+ goto ignore_char;
+
+
+ ch = UCHAR(status); /* grab the char */
+ flag = TTY_NORMAL;
+
+#if 0
+ if (info->is_console) {
+ if (ch == 0)
+ return; /* it's a break ... */
+ }
+#endif
+
+ tty = dport->port.info->tty;/* now tty points to the proper dev */
+ icount = &dport->port.icount;
+
+ if (!tty)
+ break;
+ if (tty->flip.count >= TTY_FLIPBUF_SIZE)
+ break;
+
+ icount->rx++;
+
+ /* keep track of the statistics */
+ if (status & (DZ_OERR | DZ_FERR | DZ_PERR)) {
+ if (status & DZ_PERR) /* parity error */
+ icount->parity++;
+ else if (status & DZ_FERR) /* frame error */
+ icount->frame++;
+ if (status & DZ_OERR) /* overrun error */
+ icount->overrun++;
+
+ /* check to see if we should ignore the character
+ and mask off conditions that should be ignored
+ */
+
+ if (status & dport->port.ignore_status_mask) {
+ if (++ignore > 100)
+ break;
+ goto ignore_char;
+ }
+ /* mask off the error conditions we want to ignore */
+ tmp = status & dport->port.read_status_mask;
+
+ if (tmp & DZ_PERR) {
+ flag = TTY_PARITY;
+#ifdef DEBUG_DZ
+ debug_console("PERR\n", 5);
+#endif
+ } else if (tmp & DZ_FERR) {
+ flag = TTY_FRAME;
+#ifdef DEBUG_DZ
+ debug_console("FERR\n", 5);
+#endif
+ }
+ if (tmp & DZ_OERR) {
+#ifdef DEBUG_DZ
+ debug_console("OERR\n", 5);
+#endif
+ tty_insert_flip_char(tty, ch, flag);
+ ch = 0;
+ flag = TTY_OVERRUN;
+ }
+ }
+ tty_insert_flip_char(tty, ch, flag);
+ ignore_char:
+ } while (status & DZ_DVAL);
+
+ if (tty)
+ tty_flip_buffer_push(tty);
+}
+
+/*
+ * ------------------------------------------------------------
+ * transmit_char ()
+ *
+ * This routine deals with outputs to any lines.
+ * ------------------------------------------------------------
+ */
+static inline void dz_transmit_chars(struct dz_port *dport)
+{
+ struct circ_buf *xmit = &dport->port.info->xmit;
+ unsigned char tmp;
+
+ if (dport->port.x_char) { /* XON/XOFF chars */
+ dz_out(dport, DZ_TDR, dport->port.x_char);
+ dport->port.icount.tx++;
+ dport->port.x_char = 0;
+ return;
+ }
+ /* if nothing to do or stopped or hardware stopped */
+ if (uart_circ_empty(xmit) || uart_tx_stopped(&dport->port)) {
+ dz_stop_tx(&dport->port, 0);
+ return;
+ }
+
+ /*
+ * if something to do ... (rember the dz has no output fifo so we go
+ * one char at a time :-<
+ */
+ tmp = xmit->buf[xmit->tail];
+ xmit->tail = (xmit->tail + 1) & (DZ_XMIT_SIZE - 1);
+ dz_out(dport, DZ_TDR, tmp);
+ dport->port.icount.tx++;
+
+ if (uart_circ_chars_pending(xmit) < DZ_WAKEUP_CHARS)
+ uart_write_wakeup(&dport->port);
+
+ /* Are we done */
+ if (uart_circ_empty(xmit))
+ dz_stop_tx(&dport->port, 0);
+}
+
+/*
+ * ------------------------------------------------------------
+ * check_modem_status ()
+ *
+ * Only valid for the MODEM line duh !
+ * ------------------------------------------------------------
+ */
+static inline void check_modem_status(struct dz_port *dport)
+{
+ unsigned short status;
+
+ /* if not ne modem line just return */
+ if (dport->port.line != DZ_MODEM)
+ return;
+
+ status = dz_in(dport, DZ_MSR);
+
+ /* it's easy, since DSR2 is the only bit in the register */
+ if (status)
+ dport->port.icount.dsr++;
+}
+
+/*
+ * ------------------------------------------------------------
+ * dz_interrupt ()
+ *
+ * this is the main interrupt routine for the DZ chip.
+ * It deals with the multiple ports.
+ * ------------------------------------------------------------
+ */
+static irqreturn_t dz_interrupt(int irq, void *dev, struct pt_regs *regs)
+{
+ struct dz_port *dport;
+ unsigned short status;
+
+ /* get the reason why we just got an irq */
+ status = dz_in((struct dz_port *)dev, DZ_CSR);
+ dport = &dz_ports[LINE(status)];
+
+ if (status & DZ_RDONE)
+ dz_receive_chars(dport);
+
+ if (status & DZ_TRDY)
+ dz_transmit_chars(dport);
+
+ /* FIXME: what about check modem status??? --rmk */
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * -------------------------------------------------------------------
+ * Here ends the DZ interrupt routines.
+ * -------------------------------------------------------------------
+ */
+
+static unsigned int dz_get_mctrl(struct uart_port *uport)
+{
+ struct dz_port *dport = (struct dz_port *)uport;
+ unsigned int mctrl = TIOCM_CAR | TIOCM_DSR | TIOCM_CTS;
+
+ if (dport->port.line == DZ_MODEM) {
+ /*
+ * CHECKME: This is a guess from the other code... --rmk
+ */
+ if (dz_in(dport, DZ_MSR) & DZ_MODEM_DSR)
+ mctrl &= ~TIOCM_DSR;
+ }
+
+ return mctrl;
+}
+
+static void dz_set_mctrl(struct uart_port *uport, unsigned int mctrl)
+{
+ struct dz_port *dport = (struct dz_port *)uport;
+ unsigned short tmp;
+
+ if (dport->port.line == DZ_MODEM) {
+ tmp = dz_in(dport, DZ_TCR);
+ if (mctrl & TIOCM_DTR)
+ tmp &= ~DZ_MODEM_DTR;
+ else
+ tmp |= DZ_MODEM_DTR;
+ dz_out(dport, DZ_TCR, tmp);
+ }
+}
+
+/*
+ * -------------------------------------------------------------------
+ * startup ()
+ *
+ * various initialization tasks
+ * -------------------------------------------------------------------
+ */
+static int dz_startup(struct uart_port *uport)
+{
+ struct dz_port *dport = (struct dz_port *)uport;
+ unsigned long flags;
+ unsigned short tmp;
+
+ /* The dz lines for the mouse/keyboard must be
+ * opened using their respective drivers.
+ */
+ if ((dport->port.line == DZ_KEYBOARD) ||
+ (dport->port.line == DZ_MOUSE))
+ return -ENODEV;
+
+ spin_lock_irqsave(&dport->port.lock, flags);
+
+ /* enable the interrupt and the scanning */
+ tmp = dz_in(dport, DZ_CSR);
+ tmp |= DZ_RIE | DZ_TIE | DZ_MSE;
+ dz_out(dport, DZ_CSR, tmp);
+
+ spin_unlock_irqrestore(&dport->port.lock, flags);
+
+ return 0;
+}
+
+/*
+ * -------------------------------------------------------------------
+ * shutdown ()
+ *
+ * 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 dz_shutdown(struct uart_port *uport)
+{
+ dz_stop_tx(uport, 0);
+}
+
+/*
+ * 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 unsigned int dz_tx_empty(struct uart_port *uport)
+{
+ struct dz_port *dport = (struct dz_port *)uport;
+ unsigned short status = dz_in(dport, DZ_LPR);
+
+ /* FIXME: this appears to be obviously broken --rmk. */
+ return status ? TIOCSER_TEMT : 0;
+}
+
+static void dz_break_ctl(struct uart_port *uport, int break_state)
+{
+ struct dz_port *dport = (struct dz_port *)uport;
+ unsigned long flags;
+ unsigned short tmp, mask = 1 << uport->line;
+
+ spin_lock_irqsave(&uport->lock, flags);
+ tmp = dz_in(dport, DZ_TCR);
+ if (break_state)
+ tmp |= mask;
+ else
+ tmp &= ~mask;
+ dz_out(dport, DZ_TCR, tmp);
+ spin_unlock_irqrestore(&uport->lock, flags);
+}
+
+static void dz_set_termios(struct uart_port *uport, struct termios *termios,
+ struct termios *old_termios)
+{
+ struct dz_port *dport = (struct dz_port *)uport;
+ unsigned long flags;
+ unsigned int cflag, baud;
+
+ cflag = dport->port.line;
+
+ switch (termios->c_cflag & CSIZE) {
+ case CS5:
+ cflag |= DZ_CS5;
+ break;
+ case CS6:
+ cflag |= DZ_CS6;
+ break;
+ case CS7:
+ cflag |= DZ_CS7;
+ break;
+ case CS8:
+ default:
+ cflag |= DZ_CS8;
+ }
+
+ if (termios->c_cflag & CSTOPB)
+ cflag |= DZ_CSTOPB;
+ if (termios->c_cflag & PARENB)
+ cflag |= DZ_PARENB;
+ if (termios->c_cflag & PARODD)
+ cflag |= DZ_PARODD;
+
+ baud = uart_get_baud_rate(uport, termios, old_termios, 50, 9600);
+ switch (baud) {
+ case 50:
+ cflag |= DZ_B50;
+ break;
+ case 75:
+ cflag |= DZ_B75;
+ break;
+ case 110:
+ cflag |= DZ_B110;
+ break;
+ case 134:
+ cflag |= DZ_B134;
+ break;
+ case 150:
+ cflag |= DZ_B150;
+ break;
+ case 300:
+ cflag |= DZ_B300;
+ break;
+ case 600:
+ cflag |= DZ_B600;
+ break;
+ case 1200:
+ cflag |= DZ_B1200;
+ break;
+ case 1800:
+ cflag |= DZ_B1800;
+ break;
+ case 2000:
+ cflag |= DZ_B2000;
+ break;
+ case 2400:
+ cflag |= DZ_B2400;
+ break;
+ case 3600:
+ cflag |= DZ_B3600;
+ break;
+ case 4800:
+ cflag |= DZ_B4800;
+ break;
+ case 7200:
+ cflag |= DZ_B7200;
+ break;
+ case 9600:
+ default:
+ cflag |= DZ_B9600;
+ }
+
+ if (termios->c_cflag & CREAD)
+ cflag |= DZ_RXENAB;
+
+ spin_lock_irqsave(&dport->port.lock, flags);
+
+ dz_out(dport, DZ_LPR, cflag);
+ dport->cflag = cflag;
+
+ /* setup accept flag */
+ dport->port.read_status_mask = DZ_OERR;
+ if (termios->c_iflag & INPCK)
+ dport->port.read_status_mask |= DZ_FERR | DZ_PERR;
+
+ /* characters to ignore */
+ uport->ignore_status_mask = 0;
+ if (termios->c_iflag & IGNPAR)
+ dport->port.ignore_status_mask |= DZ_FERR | DZ_PERR;
+
+ spin_unlock_irqrestore(&dport->port.lock, flags);
+}
+
+static const char *dz_type(struct uart_port *port)
+{
+ return "DZ";
+}
+
+static void dz_release_port(struct uart_port *port)
+{
+ /* nothing to do */
+}
+
+static int dz_request_port(struct uart_port *port)
+{
+ return 0;
+}
+
+static void dz_config_port(struct uart_port *port, int flags)
+{
+ if (flags & UART_CONFIG_TYPE)
+ port->type = PORT_DZ;
+}
+
+/*
+ * verify the new serial_struct (for TIOCSSERIAL).
+ */
+static int dz_verify_port(struct uart_port *port, struct serial_struct *ser)
+{
+ int ret = 0;
+ if (ser->type != PORT_UNKNOWN && ser->type != PORT_DZ)
+ ret = -EINVAL;
+ if (ser->irq != port->irq)
+ ret = -EINVAL;
+ return ret;
+}
+
+static struct uart_ops dz_ops = {
+ .tx_empty = dz_tx_empty,
+ .get_mctrl = dz_get_mctrl,
+ .set_mctrl = dz_set_mctrl,
+ .stop_tx = dz_stop_tx,
+ .start_tx = dz_start_tx,
+ .stop_rx = dz_stop_rx,
+ .enable_ms = dz_enable_ms,
+ .break_ctl = dz_break_ctl,
+ .startup = dz_startup,
+ .shutdown = dz_shutdown,
+ .set_termios = dz_set_termios,
+ .type = dz_type,
+ .release_port = dz_release_port,
+ .request_port = dz_request_port,
+ .config_port = dz_config_port,
+ .verify_port = dz_verify_port,
+};
+
+static void __init dz_init_ports(void)
+{
+ static int first = 1;
+ struct dz_port *dport;
+ unsigned long base;
+ int i;
+
+ if (!first)
+ return;
+ first = 0;
+
+ if (mips_machtype == MACH_DS23100 ||
+ mips_machtype == MACH_DS5100)
+ base = (unsigned long) KN01_DZ11_BASE;
+ else
+ base = (unsigned long) KN02_DZ11_BASE;
+
+ for (i = 0, dport = dz_ports; i < DZ_NB_PORT; i++, dport++) {
+ spin_lock_init(&dport->port.lock);
+ dport->port.membase = (char *) base;
+ dport->port.iotype = SERIAL_IO_PORT;
+ dport->port.irq = dec_interrupt[DEC_IRQ_DZ11];
+ dport->port.line = i;
+ dport->port.fifosize = 1;
+ dport->port.ops = &dz_ops;
+ dport->port.flags = UPF_BOOT_AUTOCONF;
+ }
+}
+
+static void dz_reset(struct dz_port *dport)
+{
+ dz_out(dport, DZ_CSR, DZ_CLR);
+
+ while (dz_in(dport, DZ_CSR) & DZ_CLR);
+ /* FIXME: cpu_relax? */
+
+ iob();
+
+ /* enable scanning */
+ dz_out(dport, DZ_CSR, DZ_MSE);
+}
+
+#ifdef CONFIG_SERIAL_DZ_CONSOLE
+static void dz_console_put_char(struct dz_port *dport, unsigned char ch)
+{
+ unsigned long flags;
+ int loops = 2500;
+ unsigned short tmp = ch;
+ /* this code sends stuff out to serial device - spinning its
+ wheels and waiting. */
+
+ spin_lock_irqsave(&dport->port.lock, flags);
+
+ /* spin our wheels */
+ while (((dz_in(dport, DZ_CSR) & DZ_TRDY) != DZ_TRDY) && loops--)
+ /* FIXME: cpu_relax, udelay? --rmk */
+ ;
+
+ /* Actually transmit the character. */
+ dz_out(dport, DZ_TDR, tmp);
+
+ spin_unlock_irqrestore(&dport->port.lock, flags);
+}
+/*
+ * -------------------------------------------------------------------
+ * dz_console_print ()
+ *
+ * dz_console_print is registered for printk.
+ * The console must be locked when we get here.
+ * -------------------------------------------------------------------
+ */
+static void dz_console_print(struct console *cons,
+ const char *str,
+ unsigned int count)
+{
+ struct dz_port *dport = &dz_ports[CONSOLE_LINE];
+#ifdef DEBUG_DZ
+ prom_printf((char *) str);
+#endif
+ while (count--) {
+ if (*str == '\n')
+ dz_console_put_char(dport, '\r');
+ dz_console_put_char(dport, *str++);
+ }
+}
+
+static int __init dz_console_setup(struct console *co, char *options)
+{
+ struct dz_port *dport = &dz_ports[CONSOLE_LINE];
+ int baud = 9600;
+ int bits = 8;
+ int parity = 'n';
+ int flow = 'n';
+ int ret;
+ unsigned short mask, tmp;
+
+ if (options)
+ uart_parse_options(options, &baud, &parity, &bits, &flow);
+
+ dz_reset(dport);
+
+ ret = uart_set_options(&dport->port, co, baud, parity, bits, flow);
+ if (ret == 0) {
+ mask = 1 << dport->port.line;
+ tmp = dz_in(dport, DZ_TCR); /* read the TX flag */
+ if (!(tmp & mask)) {
+ tmp |= mask; /* set the TX flag */
+ dz_out(dport, DZ_TCR, tmp);
+ }
+ }
+
+ return ret;
+}
+
+static struct console dz_sercons =
+{
+ .name = "ttyS",
+ .write = dz_console_print,
+ .device = uart_console_device,
+ .setup = dz_console_setup,
+ .flags = CON_CONSDEV | CON_PRINTBUFFER,
+ .index = CONSOLE_LINE,
+};
+
+void __init dz_serial_console_init(void)
+{
+ dz_init_ports();
+
+ register_console(&dz_sercons);
+}
+
+#define SERIAL_DZ_CONSOLE &dz_sercons
+#else
+#define SERIAL_DZ_CONSOLE NULL
+#endif /* CONFIG_SERIAL_DZ_CONSOLE */
+
+static struct uart_driver dz_reg = {
+ .owner = THIS_MODULE,
+ .driver_name = "serial",
+#ifdef CONFIG_DEVFS
+ .dev_name = "tts/%d",
+#else
+ .dev_name = "ttyS%d",
+#endif
+ .major = TTY_MAJOR,
+ .minor = 64,
+ .nr = DZ_NB_PORT,
+ .cons = SERIAL_DZ_CONSOLE,
+};
+
+int __init dz_init(void)
+{
+ unsigned long flags;
+ int ret, i;
+
+ printk("%s%s\n", dz_name, dz_version);
+
+ dz_init_ports();
+
+ save_flags(flags);
+ cli();
+
+#ifndef CONFIG_SERIAL_DZ_CONSOLE
+ /* reset the chip */
+ dz_reset(&dz_ports[0]);
+#endif
+
+ /* order matters here... the trick is that flags
+ is updated... in request_irq - to immediatedly obliterate
+ it is unwise. */
+ restore_flags(flags);
+
+ if (request_irq(dz_ports[0].port.irq, dz_interrupt,
+ SA_INTERRUPT, "DZ", &dz_ports[0]))
+ panic("Unable to register DZ interrupt");
+
+ ret = uart_register_driver(&dz_reg);
+ if (ret != 0)
+ return ret;
+
+ for (i = 0; i < DZ_NB_PORT; i++)
+ uart_add_one_port(&dz_reg, &dz_ports[i].port);
+
+ return ret;
+}
+
+MODULE_DESCRIPTION("DECstation DZ serial driver");
+MODULE_LICENSE("GPL");