/*
* This routine sends a break character out the serial port.
*/
static void send_break(struct dz_serial *info, int duration)
{
unsigned long flags;
unsigned short tmp, mask;
if (!info->port)
return;
mask = 1 << info->line;
tmp = dz_in(info, DZ_TCR);
tmp |= mask;
current->state = TASK_INTERRUPTIBLE;
save_flags(flags);
cli();
dz_out(info, DZ_TCR, tmp);
schedule_timeout(duration);
tmp &= ~mask;
dz_out(info, DZ_TCR, tmp);
restore_flags(flags);
}
/*
* -------------------------------------------------------------------
* 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 shutdown(struct dz_serial *info)
{
unsigned long flags;
unsigned short tmp;
if (!info->is_initialized)
return;
save_flags(flags);
cli();
dz_stop(info->tty);
info->cflags &= ~DZ_CREAD; /* turn off receive enable flag */
dz_out(info, DZ_LPR, info->cflags);
if (info->xmit_buf) { /* free Tx buffer */
free_page((unsigned long) info->xmit_buf);
info->xmit_buf = 0;
}
if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
tmp = dz_in(info, DZ_TCR);
if (tmp & DZ_MODEM_DTR) {
tmp &= ~DZ_MODEM_DTR;
dz_out(info, DZ_TCR, tmp);
}
}
if (info->tty)
set_bit(TTY_IO_ERROR, &info->tty->flags);
info->is_initialized = 0;
restore_flags(flags);
}
static void dz_reset(struct dz_port *dport)
{
dz_out(dport, DZ_CSR, DZ_CLR);
while (dz_in(dport, DZ_CSR) & DZ_CLR);
iob();
/* enable scanning */
dz_out(dport, DZ_CSR, DZ_MSE);
}
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 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 | dport->port.line);
spin_unlock_irqrestore(&dport->port.lock, flags);
}
/*
* -------------------------------------------------------------------
* startup ()
*
* various initialization tasks
* -------------------------------------------------------------------
*/
static int startup(struct dz_serial *info)
{
unsigned long page, flags;
unsigned short tmp;
if (info->is_initialized)
return 0;
save_flags(flags);
cli();
if (!info->port) {
if (info->tty)
set_bit(TTY_IO_ERROR, &info->tty->flags);
restore_flags(flags);
return -ENODEV;
}
if (!info->xmit_buf) {
page = get_free_page(GFP_KERNEL);
if (!page) {
restore_flags(flags);
return -ENOMEM;
}
info->xmit_buf = (unsigned char *) page;
}
if (info->tty)
clear_bit(TTY_IO_ERROR, &info->tty->flags);
/* enable the interrupt and the scanning */
tmp = dz_in(info, DZ_CSR);
tmp |= (DZ_RIE | DZ_TIE | DZ_MSE);
dz_out(info, DZ_CSR, tmp);
info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
/* set up the speed */
change_speed(info);
/* clear the line transmitter buffer
I can't figure out why I need to do this - but
its necessary - in order for the console portion
and the interrupt portion to live happily side by side.
*/
/* clear the line transmitter buffer
I can't figure out why I need to do this - but
its necessary - in order for the console portion
and the interrupt portion to live happily side by side.
*/
info->is_initialized = 1;
restore_flags(flags);
return 0;
}
static void dz_start(struct tty_struct *tty)
{
struct dz_serial *info = (struct dz_serial *) tty->driver_data;
unsigned short mask, tmp;
mask = 1 << info->line;
tmp = dz_in(info, DZ_TCR); /* read the TX flag */
tmp |= mask; /* set the TX flag */
dz_out(info, DZ_TCR, tmp);
}
static void dz_start_tx(struct uart_port *uport)
{
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);
}
/*
* ------------------------------------------------------------
* transmit_char ()
*
* This routine deals with outputs to any lines.
* ------------------------------------------------------------
*/
static inline void dz_transmit_chars(struct dz_port *dport_in)
{
struct dz_port *dport;
struct circ_buf *xmit;
unsigned short status;
unsigned char tmp;
status = dz_in(dport_in, DZ_CSR);
dport = &dz_ports[LINE(status)];
xmit = &dport->port.info->xmit;
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);
return;
}
/*
* If something to do... (remember 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 are done. */
if (uart_circ_empty(xmit))
dz_stop_tx(&dport->port);
}
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);
}
}
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_stop(struct tty_struct *tty)
{
struct dz_serial *info;
unsigned short mask, tmp;
if (tty == 0)
return;
info = (struct dz_serial *) tty->driver_data;
mask = 1 << info->line;
tmp = dz_in(info, DZ_TCR); /* read the TX flag */
tmp &= ~mask; /* clear the TX flag */
dz_out(info, 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;
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;
}
static void dz_set_mctrl(struct uart_port *uport, unsigned int mctrl)
{
/*
* FIXME: Handle the 3100/5000 as appropriate. --macro
*/
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);
}
}
static void dz_break_ctl(struct uart_port *uport, int break_state)
{
/*
* FIXME: Can't access BREAK bits in TDR easily;
* reuse the code for polled TX. --macro
*/
struct dz_port *dport = (struct dz_port *)uport;
unsigned long flags;
unsigned short tmp, mask = 1 << dport->port.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_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);
}
static void dz_console_put_char(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. */
/* force the issue - point it at lines[3] */
dz_console = &multi[CONSOLE_LINE];
save_flags(flags);
cli();
/* spin our wheels */
while (((dz_in(dz_console, DZ_CSR) & DZ_TRDY) != DZ_TRDY) && loops--);
/* Actually transmit the character. */
dz_out(dz_console, DZ_TDR, tmp);
restore_flags(flags);
}
/*
* -------------------------------------------------------------------
* 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;
}
/*
* -------------------------------------------------------------------
* dz_console_putchar() -- transmit a character
*
* Polled transmission. This is tricky. We need to mask transmit
* interrupts so that they do not interfere, enable the transmitter
* for the line requested and then wait till the transmit scanner
* requests data for this line. But it may request data for another
* line first, in which case we have to disable its transmitter and
* repeat waiting till our line pops up. Only then the character may
* be transmitted. Finally, the state of the transmitter mask is
* restored. Welcome to the world of PDP-11!
* -------------------------------------------------------------------
*/
static void dz_console_putchar(struct uart_port *uport, int ch)
{
struct dz_port *dport = (struct dz_port *)uport;
unsigned long flags;
unsigned short csr, tcr, trdy, mask;
int loops = 10000;
spin_lock_irqsave(&dport->port.lock, flags);
csr = dz_in(dport, DZ_CSR);
dz_out(dport, DZ_CSR, csr & ~DZ_TIE);
tcr = dz_in(dport, DZ_TCR);
tcr |= 1 << dport->port.line;
mask = tcr;
dz_out(dport, DZ_TCR, mask);
iob();
spin_unlock_irqrestore(&dport->port.lock, flags);
while (loops--) {
trdy = dz_in(dport, DZ_CSR);
if (!(trdy & DZ_TRDY))
continue;
trdy = (trdy & DZ_TLINE) >> 8;
if (trdy == dport->port.line)
break;
mask &= ~(1 << trdy);
dz_out(dport, DZ_TCR, mask);
iob();
udelay(2);
}
if (loops) /* Cannot send otherwise. */
dz_out(dport, DZ_TDR, ch);
dz_out(dport, DZ_TCR, tcr);
dz_out(dport, DZ_CSR, csr);
}
static int __init dz_console_setup(struct console *co, char *options)
{
int baud = 9600;
int bits = 8;
int parity = 'n';
int cflag = CREAD | HUPCL | CLOCAL;
char *s;
unsigned short mask, tmp;
if (options) {
baud = simple_strtoul(options, NULL, 10);
s = options;
while (*s >= '0' && *s <= '9')
s++;
if (*s)
parity = *s++;
if (*s)
bits = *s - '0';
}
/*
* Now construct a cflag setting.
*/
switch (baud) {
case 1200:
cflag |= DZ_B1200;
break;
case 2400:
cflag |= DZ_B2400;
break;
case 4800:
cflag |= DZ_B4800;
break;
case 9600:
default:
cflag |= DZ_B9600;
break;
}
switch (bits) {
case 7:
cflag |= DZ_CS7;
break;
default:
case 8:
cflag |= DZ_CS8;
break;
}
switch (parity) {
case 'o':
case 'O':
cflag |= DZ_PARODD;
break;
case 'e':
case 'E':
cflag |= DZ_PARENB;
break;
}
co->cflag = cflag;
/* TOFIX: force to console line */
dz_console = &multi[CONSOLE_LINE];
if ((mips_machtype == MACH_DS23100) || (mips_machtype == MACH_DS5100))
dz_console->port = KN01_DZ11_BASE;
else
dz_console->port = KN02_DZ11_BASE;
dz_console->line = CONSOLE_LINE;
dz_out(dz_console, DZ_CSR, DZ_CLR);
while ((tmp = dz_in(dz_console, DZ_CSR)) & DZ_CLR);
/* enable scanning */
dz_out(dz_console, DZ_CSR, DZ_MSE);
/* Set up flags... */
dz_console->cflags = 0;
dz_console->cflags |= DZ_B9600;
dz_console->cflags |= DZ_CS8;
dz_console->cflags |= DZ_PARENB;
dz_out(dz_console, DZ_LPR, dz_console->cflags);
mask = 1 << dz_console->line;
tmp = dz_in(dz_console, DZ_TCR); /* read the TX flag */
if (!(tmp & mask)) {
tmp |= mask; /* set the TX flag */
dz_out(dz_console, DZ_TCR, tmp);
}
return 0;
}
static void dz_set_termios(struct uart_port *uport, struct ktermios *termios,
struct ktermios *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->port.line);
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);
}
/*
* ------------------------------------------------------------
* receive_char ()
*
* This routine deals with inputs from any lines.
* ------------------------------------------------------------
*/
static inline void receive_chars(struct dz_serial *info_in)
{
struct dz_serial *info;
struct tty_struct *tty = 0;
struct async_icount *icount;
int ignore = 0;
unsigned short status, tmp;
unsigned char ch;
/* 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(info_in, DZ_RBUF);
info = lines[LINE(status)];
/* punt so we don't get duplicate characters */
if (!(status & DZ_DVAL))
goto ignore_char;
ch = UCHAR(status); /* grab the char */
#if 0
if (info->is_console) {
if (ch == 0)
return; /* it's a break ... */
}
#endif
tty = info->tty; /* now tty points to the proper dev */
icount = &info->icount;
if (!tty)
break;
if (tty->flip.count >= TTY_FLIPBUF_SIZE)
break;
*tty->flip.char_buf_ptr = ch;
*tty->flip.flag_buf_ptr = 0;
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 & info->ignore_status_mask) {
if (++ignore > 100)
break;
goto ignore_char;
}
/* mask off the error conditions we want to ignore */
tmp = status & info->read_status_mask;
if (tmp & DZ_PERR) {
*tty->flip.flag_buf_ptr = TTY_PARITY;
#ifdef DEBUG_DZ
debug_console("PERR\n", 5);
#endif
} else if (tmp & DZ_FERR) {
*tty->flip.flag_buf_ptr = TTY_FRAME;
#ifdef DEBUG_DZ
debug_console("FERR\n", 5);
#endif
}
if (tmp & DZ_OERR) {
#ifdef DEBUG_DZ
debug_console("OERR\n", 5);
#endif
if (tty->flip.count < TTY_FLIPBUF_SIZE) {
tty->flip.count++;
tty->flip.flag_buf_ptr++;
tty->flip.char_buf_ptr++;
*tty->flip.flag_buf_ptr = TTY_OVERRUN;
}
}
}
tty->flip.flag_buf_ptr++;
tty->flip.char_buf_ptr++;
tty->flip.count++;
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 transmit_chars(struct dz_serial *info)
{
unsigned char tmp;
if (info->x_char) { /* XON/XOFF chars */
dz_out(info, DZ_TDR, info->x_char);
info->icount.tx++;
info->x_char = 0;
return;
}
/* if nothing to do or stopped or hardware stopped */
if ((info->xmit_cnt <= 0) || info->tty->stopped || info->tty->hw_stopped) {
dz_stop(info->tty);
return;
}
/*
* if something to do ... (rember the dz has no output fifo so we go
* one char at a time :-<
*/
tmp = (unsigned short) info->xmit_buf[info->xmit_tail++];
dz_out(info, DZ_TDR, tmp);
info->xmit_tail = info->xmit_tail & (DZ_XMIT_SIZE - 1);
info->icount.tx++;
if (--info->xmit_cnt < WAKEUP_CHARS)
dz_sched_event(info, DZ_EVENT_WRITE_WAKEUP);
/* Are we done */
if (info->xmit_cnt <= 0)
dz_stop(info->tty);
}
/*
* -------------------------------------------------------------------
* change_speed ()
*
* set the baud rate.
* -------------------------------------------------------------------
*/
static void change_speed(struct dz_serial *info)
{
unsigned long flags;
unsigned cflag;
int baud;
if (!info->tty || !info->tty->termios)
return;
save_flags(flags);
cli();
info->cflags = info->line;
cflag = info->tty->termios->c_cflag;
switch (cflag & CSIZE) {
case CS5:
info->cflags |= DZ_CS5;
break;
case CS6:
info->cflags |= DZ_CS6;
break;
case CS7:
info->cflags |= DZ_CS7;
break;
case CS8:
default:
info->cflags |= DZ_CS8;
}
if (cflag & CSTOPB)
info->cflags |= DZ_CSTOPB;
if (cflag & PARENB)
info->cflags |= DZ_PARENB;
if (cflag & PARODD)
info->cflags |= DZ_PARODD;
baud = tty_get_baud_rate(info->tty);
switch (baud) {
case 50:
info->cflags |= DZ_B50;
break;
case 75:
info->cflags |= DZ_B75;
break;
case 110:
info->cflags |= DZ_B110;
break;
case 134:
info->cflags |= DZ_B134;
break;
case 150:
info->cflags |= DZ_B150;
break;
case 300:
info->cflags |= DZ_B300;
break;
case 600:
info->cflags |= DZ_B600;
break;
case 1200:
info->cflags |= DZ_B1200;
break;
case 1800:
info->cflags |= DZ_B1800;
break;
case 2000:
info->cflags |= DZ_B2000;
break;
case 2400:
info->cflags |= DZ_B2400;
break;
case 3600:
info->cflags |= DZ_B3600;
break;
case 4800:
info->cflags |= DZ_B4800;
break;
case 7200:
info->cflags |= DZ_B7200;
break;
case 9600:
default:
info->cflags |= DZ_B9600;
}
info->cflags |= DZ_RXENAB;
dz_out(info, DZ_LPR, info->cflags);
/* setup accept flag */
info->read_status_mask = DZ_OERR;
if (I_INPCK(info->tty))
info->read_status_mask |= (DZ_FERR | DZ_PERR);
/* characters to ignore */
info->ignore_status_mask = 0;
if (I_IGNPAR(info->tty))
info->ignore_status_mask |= (DZ_FERR | DZ_PERR);
restore_flags(flags);
}
/*
* ------------------------------------------------------------
* 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++;
}
int __init dz_init(void)
{
int i;
long flags;
struct dz_serial *info;
/* Setup base handler, and timer table. */
init_bh(SERIAL_BH, do_serial_bh);
show_serial_version();
memset(&serial_driver, 0, sizeof(struct tty_driver));
serial_driver.magic = TTY_DRIVER_MAGIC;
#if (LINUX_VERSION_CODE > 0x2032D && defined(CONFIG_DEVFS_FS))
serial_driver.name = "ttyS";
#else
serial_driver.name = "tts/%d";
#endif
serial_driver.major = TTY_MAJOR;
serial_driver.minor_start = 64;
serial_driver.num = DZ_NB_PORT;
serial_driver.type = TTY_DRIVER_TYPE_SERIAL;
serial_driver.subtype = SERIAL_TYPE_NORMAL;
serial_driver.init_termios = tty_std_termios;
serial_driver.init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL |
CLOCAL;
serial_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
serial_driver.refcount = &serial_refcount;
serial_driver.table = serial_table;
serial_driver.termios = serial_termios;
serial_driver.termios_locked = serial_termios_locked;
serial_driver.open = dz_open;
serial_driver.close = dz_close;
serial_driver.write = dz_write;
serial_driver.flush_chars = dz_flush_chars;
serial_driver.write_room = dz_write_room;
serial_driver.chars_in_buffer = dz_chars_in_buffer;
serial_driver.flush_buffer = dz_flush_buffer;
serial_driver.ioctl = dz_ioctl;
serial_driver.throttle = dz_throttle;
serial_driver.unthrottle = dz_unthrottle;
serial_driver.send_xchar = dz_send_xchar;
serial_driver.set_termios = dz_set_termios;
serial_driver.stop = dz_stop;
serial_driver.start = dz_start;
serial_driver.hangup = dz_hangup;
/*
* The callout device is just like normal device except for
* major number and the subtype code.
*/
callout_driver = serial_driver;
#if (LINUX_VERSION_CODE > 0x2032D && defined(CONFIG_DEVFS_FS))
callout_driver.name = "cua";
#else
callout_driver.name = "cua/%d";
#endif
callout_driver.major = TTYAUX_MAJOR;
callout_driver.subtype = SERIAL_TYPE_CALLOUT;
if (tty_register_driver(&serial_driver))
panic("Couldn't register serial driver");
if (tty_register_driver(&callout_driver))
panic("Couldn't register callout driver");
save_flags(flags);
cli();
for (i = 0; i < DZ_NB_PORT; i++) {
info = &multi[i];
lines[i] = info;
info->magic = SERIAL_MAGIC;
if (mips_machtype == MACH_DS23100 ||
mips_machtype == MACH_DS5100)
info->port = (unsigned long) KN01_DZ11_BASE;
else
info->port = (unsigned long) KN02_DZ11_BASE;
info->line = i;
info->tty = 0;
info->close_delay = 50;
info->closing_wait = 3000;
info->x_char = 0;
info->event = 0;
info->count = 0;
info->blocked_open = 0;
info->tqueue.routine = do_softint;
info->tqueue.data = info;
info->tqueue_hangup.routine = do_serial_hangup;
info->tqueue_hangup.data = info;
info->callout_termios = callout_driver.init_termios;
info->normal_termios = serial_driver.init_termios;
init_waitqueue_head(&info->open_wait);
init_waitqueue_head(&info->close_wait);
/*
* If we are pointing to address zero then punt - not correctly
* set up in setup.c to handle this.
*/
if (!info->port)
return 0;
printk("ttyS%02d at 0x%08x (irq = %d)\n", info->line,
info->port, dec_interrupt[DEC_IRQ_DZ11]);
tty_register_devfs(&serial_driver, 0,
serial_driver.minor_start + info->line);
tty_register_devfs(&callout_driver, 0,
callout_driver.minor_start + info->line);
}
/* reset the chip */
#ifndef CONFIG_SERIAL_DEC_CONSOLE
dz_out(info, DZ_CSR, DZ_CLR);
while (dz_in(info, DZ_CSR) & DZ_CLR);
iob();
/* enable scanning */
dz_out(info, DZ_CSR, DZ_MSE);
#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(dec_interrupt[DEC_IRQ_DZ11], dz_interrupt,
SA_INTERRUPT, "DZ", lines[0]))
panic("Unable to register DZ interrupt");
return 0;
}
