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specialix: Code cleanups 

Go through the inlines and other oddments that are iffy. Remove various bits
of dead code and bogus debug. Turn the crtsdts compile time option into a
runtime switch.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alan Cox 2008-07-22 11:17:16 +01:00 committed by Linus Torvalds
parent a72492bd8a
commit d2fbd0f2f9
3 changed files with 47 additions and 187 deletions
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8
Documentation/specialix.txt
View File

@ -270,8 +270,8 @@ The pinout of the connectors on the IO8+ is:
Hardware handshaking issues.
============================
The driver can be compiled in two different ways. The default
("Specialix DTR/RTS pin is RTS" is off) the pin behaves as DTR when
The driver can be told to operate in two different ways. The default
behaviour is specialix.sx_rtscts = 0 where the pin behaves as DTR when
hardware handshaking is off. It behaves as the RTS hardware
handshaking signal when hardware handshaking is selected.
@ -280,7 +280,7 @@ cable will either be compatible with hardware handshaking or with
software handshaking. So switching on the fly is not really an
option.
I actually prefer to use the "Specialix DTR/RTS pin is RTS" option.
I actually prefer to use the "specialix.sx_rtscts=1" option.
This makes the DTR/RTS pin always an RTS pin, and ioctls to
change DTR are always ignored. I have a cable that is configured
for this.
@ -379,7 +379,5 @@ it doesn't fit in your computer, bring back the card.
You have to WRITE to the address register to even
read-probe a CD186x register. Disable autodetection?
-- Specialix: any suggestions?
- Arbitrary baud rates are not implemented yet.
If you need this, bug me about it.

10
drivers/char/Kconfig
View File

@ -300,16 +300,6 @@ config SPECIALIX
and compile this driver as kernel loadable module which will be
called specialix.
config SPECIALIX_RTSCTS
bool "Specialix DTR/RTS pin is RTS"
depends on SPECIALIX
help
The Specialix IO8+ card can only support either RTS or DTR. If you
say N here, the driver will use the pin as "DTR" when the tty is in
software handshake mode. If you say Y here or hardware handshake is
on, it will always be RTS. Read the file
<file:Documentation/specialix.txt> for more information.
config SX
tristate "Specialix SX (and SI) card support"
depends on SERIAL_NONSTANDARD && (PCI || EISA || ISA)

216
drivers/char/specialix.c
View File

@ -110,6 +110,7 @@
static int sx_debug;
static int sx_rxfifo = SPECIALIX_RXFIFO;
static int sx_rtscts;
#ifdef DEBUG
#define dprintk(f, str...) if (sx_debug & f) printk(str)
@ -134,25 +135,12 @@ static int sx_rxfifo = SPECIALIX_RXFIFO;
#define func_enter() dprintk(SX_DEBUG_FLOW, "io8: enter %s\n", __func__)
#define func_exit() dprintk(SX_DEBUG_FLOW, "io8: exit %s\n", __func__)
#define jiffies_from_ms(a) ((((a) * HZ)/1000)+1)
/* Configurable options: */
/* Am I paranoid or not ? ;-) */
#define SPECIALIX_PARANOIA_CHECK
/* Do I trust the IRQ from the card? (enabeling it doesn't seem to help)
When the IRQ routine leaves the chip in a state that is keeps on
requiring attention, the timer doesn't help either. */
#undef SPECIALIX_TIMER
#ifdef SPECIALIX_TIMER
static int sx_poll = HZ;
#endif
/*
* The following defines are mostly for testing purposes. But if you need
* some nice reporting in your syslog, you can define them also.
@ -162,16 +150,6 @@ static int sx_poll = HZ;
#ifdef CONFIG_SPECIALIX_RTSCTS
#define SX_CRTSCTS(bla) 1
#else
#define SX_CRTSCTS(tty) C_CRTSCTS(tty)
#endif
/* Used to be outb(0xff, 0x80); */
#define short_pause() udelay(1)
#define SPECIALIX_LEGAL_FLAGS \
(ASYNC_HUP_NOTIFY | ASYNC_SAK | ASYNC_SPLIT_TERMIOS | \
@ -190,14 +168,7 @@ static struct specialix_board sx_board[SX_NBOARD] = {
static struct specialix_port sx_port[SX_NBOARD * SX_NPORT];
#ifdef SPECIALIX_TIMER
static struct timer_list missed_irq_timer;
static irqreturn_t sx_interrupt(int irq, void *dev_id);
#endif
static inline int sx_paranoia_check(struct specialix_port const *port,
static int sx_paranoia_check(struct specialix_port const *port,
char *name, const char *routine)
{
#ifdef SPECIALIX_PARANOIA_CHECK
@ -288,7 +259,7 @@ static inline void sx_out_off(struct specialix_board *bp,
/* Wait for Channel Command Register ready */
static inline void sx_wait_CCR(struct specialix_board *bp)
static void sx_wait_CCR(struct specialix_board *bp)
{
unsigned long delay, flags;
unsigned char ccr;
@ -307,7 +278,7 @@ static inline void sx_wait_CCR(struct specialix_board *bp)
/* Wait for Channel Command Register ready */
static inline void sx_wait_CCR_off(struct specialix_board *bp)
static void sx_wait_CCR_off(struct specialix_board *bp)
{
unsigned long delay;
unsigned char crr;
@ -330,7 +301,7 @@ static inline void sx_wait_CCR_off(struct specialix_board *bp)
* specialix IO8+ IO range functions.
*/
static inline int sx_request_io_range(struct specialix_board *bp)
static int sx_request_io_range(struct specialix_board *bp)
{
return request_region(bp->base,
bp->flags & SX_BOARD_IS_PCI ? SX_PCI_IO_SPACE : SX_IO_SPACE,
@ -338,7 +309,7 @@ static inline int sx_request_io_range(struct specialix_board *bp)
}
static inline void sx_release_io_range(struct specialix_board *bp)
static void sx_release_io_range(struct specialix_board *bp)
{
release_region(bp->base, bp->flags & SX_BOARD_IS_PCI ?
SX_PCI_IO_SPACE : SX_IO_SPACE);
@ -440,36 +411,10 @@ static int read_cross_byte(struct specialix_board *bp, int reg, int bit)
}
#ifdef SPECIALIX_TIMER
void missed_irq(unsigned long data)
{
unsigned char irq;
unsigned long flags;
struct specialix_board *bp = (struct specialix_board *)data;
spin_lock_irqsave(&bp->lock, flags);
irq = sx_in((struct specialix_board *)data, CD186x_SRSR) &
(SRSR_RREQint | SRSR_TREQint | SRSR_MREQint);
spin_unlock_irqrestore(&bp->lock, flags);
if (irq) {
printk(KERN_INFO
"Missed interrupt... Calling int from timer. \n");
sx_interrupt(-1, bp);
}
mod_timer(&missed_irq_timer, jiffies + sx_poll);
}
#endif
/* Main probing routine, also sets irq. */
static int sx_probe(struct specialix_board *bp)
{
unsigned char val1, val2;
#if 0
int irqs = 0;
int retries;
#endif
int rev;
int chip;
@ -482,15 +427,15 @@ static int sx_probe(struct specialix_board *bp)
/* Are the I/O ports here ? */
sx_out_off(bp, CD186x_PPRL, 0x5a);
short_pause();
udelay(1);
val1 = sx_in_off(bp, CD186x_PPRL);
sx_out_off(bp, CD186x_PPRL, 0xa5);
short_pause();
udelay(1);
val2 = sx_in_off(bp, CD186x_PPRL);
if ((val1 != 0x5a) || (val2 != 0xa5)) {
if (val1 != 0x5a || val2 != 0xa5) {
printk(KERN_INFO
"sx%d: specialix IO8+ Board at 0x%03x not found.\n",
board_No(bp), bp->base);
@ -522,50 +467,6 @@ static int sx_probe(struct specialix_board *bp)
}
#if 0
/* It's time to find IRQ for this board */
for (retries = 0; retries < 5 && irqs <= 0; retries++) {
irqs = probe_irq_on();
sx_init_CD186x(bp); /* Reset CD186x chip */
sx_out(bp, CD186x_CAR, 2); /* Select port 2 */
sx_wait_CCR(bp);
sx_out(bp, CD186x_CCR, CCR_TXEN); /* Enable transmitter */
sx_out(bp, CD186x_IER, IER_TXRDY); /* Enable tx empty intr */
msleep(50);
irqs = probe_irq_off(irqs);
dprintk(SX_DEBUG_INIT, "SRSR = %02x, ", sx_in(bp, CD186x_SRSR));
dprintk(SX_DEBUG_INIT, "TRAR = %02x, ", sx_in(bp, CD186x_TRAR));
dprintk(SX_DEBUG_INIT, "GIVR = %02x, ", sx_in(bp, CD186x_GIVR));
dprintk(SX_DEBUG_INIT, "GICR = %02x, ", sx_in(bp, CD186x_GICR));
dprintk(SX_DEBUG_INIT, "\n");
/* Reset CD186x again */
if (!sx_init_CD186x(bp)) {
/* Hmmm. This is dead code anyway. */
}
dprintk(SX_DEBUG_INIT
"val1 = %02x, val2 = %02x, val3 = %02x.\n",
val1, val2, val3);
}
#if 0
if (irqs <= 0) {
printk(KERN_ERR
"sx%d: Can't find IRQ for specialix IO8+ board at 0x%03x.\n",
board_No(bp), bp->base);
sx_release_io_range(bp);
func_exit();
return 1;
}
#endif
printk(KERN_INFO "Started with irq=%d, but now have irq=%d.\n",
bp->irq, irqs);
if (irqs > 0)
bp->irq = irqs;
#endif
/* Reset CD186x again */
if (!sx_init_CD186x(bp)) {
sx_release_io_range(bp);
@ -610,11 +511,6 @@ static int sx_probe(struct specialix_board *bp)
dprintk(SX_DEBUG_INIT, " GFCR = 0x%02x\n", sx_in_off(bp, CD186x_GFRCR));
#ifdef SPECIALIX_TIMER
setup_timer(&missed_irq_timer, missed_irq, (unsigned long)bp);
mod_timer(&missed_irq_timer, jiffies + sx_poll);
#endif
printk(KERN_INFO
"sx%d: specialix IO8+ board detected at 0x%03x, IRQ %d, CD%d Rev. %c.\n",
board_No(bp), bp->base, bp->irq, chip, rev);
@ -628,7 +524,7 @@ static int sx_probe(struct specialix_board *bp)
* Interrupt processing routines.
* */
static inline struct specialix_port *sx_get_port(struct specialix_board *bp,
static struct specialix_port *sx_get_port(struct specialix_board *bp,
unsigned char const *what)
{
unsigned char channel;
@ -654,7 +550,7 @@ static inline struct specialix_port *sx_get_port(struct specialix_board *bp,
}
static inline void sx_receive_exc(struct specialix_board *bp)
static void sx_receive_exc(struct specialix_board *bp)
{
struct specialix_port *port;
struct tty_struct *tty;
@ -729,7 +625,7 @@ static inline void sx_receive_exc(struct specialix_board *bp)
}
static inline void sx_receive(struct specialix_board *bp)
static void sx_receive(struct specialix_board *bp)
{
struct specialix_port *port;
struct tty_struct *tty;
@ -758,7 +654,7 @@ static inline void sx_receive(struct specialix_board *bp)
}
static inline void sx_transmit(struct specialix_board *bp)
static void sx_transmit(struct specialix_board *bp)
{
struct specialix_port *port;
struct tty_struct *tty;
@ -838,7 +734,7 @@ static inline void sx_transmit(struct specialix_board *bp)
}
static inline void sx_check_modem(struct specialix_board *bp)
static void sx_check_modem(struct specialix_board *bp)
{
struct specialix_port *port;
struct tty_struct *tty;
@ -853,7 +749,6 @@ static inline void sx_check_modem(struct specialix_board *bp)
tty = port->port.tty;
mcr = sx_in(bp, CD186x_MCR);
printk("mcr = %02x.\n", mcr); /* FIXME */
if ((mcr & MCR_CDCHG)) {
dprintk(SX_DEBUG_SIGNALS, "CD just changed... ");
@ -983,13 +878,6 @@ static void turn_ints_off(struct specialix_board *bp)
unsigned long flags;
func_enter();
if (bp->flags & SX_BOARD_IS_PCI) {
/* This was intended for enabeling the interrupt on the
* PCI card. However it seems that it's already enabled
* and as PCI interrupts can be shared, there is no real
* reason to have to turn it off. */
}
spin_lock_irqsave(&bp->lock, flags);
(void) sx_in_off(bp, 0); /* Turn off interrupts. */
spin_unlock_irqrestore(&bp->lock, flags);
@ -1003,9 +891,6 @@ static void turn_ints_on(struct specialix_board *bp)
func_enter();
if (bp->flags & SX_BOARD_IS_PCI) {
/* play with the PCI chip. See comment above. */
}
spin_lock_irqsave(&bp->lock, flags);
(void) sx_in(bp, 0); /* Turn ON interrupts. */
spin_unlock_irqrestore(&bp->lock, flags);
@ -1015,7 +900,7 @@ static void turn_ints_on(struct specialix_board *bp)
/* Called with disabled interrupts */
static inline int sx_setup_board(struct specialix_board *bp)
static int sx_setup_board(struct specialix_board *bp)
{
int error;
@ -1040,7 +925,7 @@ static inline int sx_setup_board(struct specialix_board *bp)
/* Called with disabled interrupts */
static inline void sx_shutdown_board(struct specialix_board *bp)
static void sx_shutdown_board(struct specialix_board *bp)
{
func_enter();
@ -1058,6 +943,12 @@ static inline void sx_shutdown_board(struct specialix_board *bp)
func_exit();
}
static unsigned int sx_crtscts(struct tty_struct *tty)
{
if (sx_rtscts)
return C_CRTSCTS(tty);
return 1;
}
/*
* Setting up port characteristics.
@ -1090,7 +981,7 @@ static void sx_change_speed(struct specialix_board *bp,
/* The Specialix board doens't implement the RTS lines.
They are used to set the IRQ level. Don't touch them. */
if (SX_CRTSCTS(tty))
if (sx_crtscts(tty))
port->MSVR = MSVR_DTR | (sx_in(bp, CD186x_MSVR) & MSVR_RTS);
else
port->MSVR = (sx_in(bp, CD186x_MSVR) & MSVR_RTS);
@ -1108,7 +999,7 @@ static void sx_change_speed(struct specialix_board *bp,
if (!baud) {
/* Drop DTR & exit */
dprintk(SX_DEBUG_TERMIOS, "Dropping DTR... Hmm....\n");
if (!SX_CRTSCTS(tty)) {
if (!sx_crtscts(tty)) {
port->MSVR &= ~MSVR_DTR;
spin_lock_irqsave(&bp->lock, flags);
sx_out(bp, CD186x_MSVR, port->MSVR);
@ -1118,7 +1009,7 @@ static void sx_change_speed(struct specialix_board *bp,
return;
} else {
/* Set DTR on */
if (!SX_CRTSCTS(tty))
if (!sx_crtscts(tty))
port->MSVR |= MSVR_DTR;
}
@ -1448,7 +1339,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
spin_lock_irqsave(&bp->lock, flags);
sx_out(bp, CD186x_CAR, port_No(port));
CD = sx_in(bp, CD186x_MSVR) & MSVR_CD;
if (SX_CRTSCTS(tty)) {
if (sx_crtscts(tty)) {
/* Activate RTS */
port->MSVR |= MSVR_DTR; /* WTF? */
sx_out(bp, CD186x_MSVR, port->MSVR);
@ -1600,7 +1491,7 @@ static void sx_close(struct tty_struct *tty, struct file *filp)
}
bp = port_Board(port);
if ((tty->count == 1) && (port->port.count != 1)) {
if (tty->count == 1 && port->port.count != 1) {
printk(KERN_ERR "sx%d: sx_close: bad port count;"
" tty->count is 1, port count is %d\n",
board_No(bp), port->port.count);
@ -1868,17 +1759,15 @@ static int sx_tiocmget(struct tty_struct *tty, struct file *file)
dprintk(SX_DEBUG_INIT, "Got msvr[%d] = %02x, car = %d.\n",
port_No(port), status, sx_in(bp, CD186x_CAR));
dprintk(SX_DEBUG_INIT, "sx_port = %p, port = %p\n", sx_port, port);
if (SX_CRTSCTS(port->port.tty)) {
result = /* (status & MSVR_RTS) ? */ TIOCM_DTR /* : 0) */
if (sx_crtscts(port->port.tty)) {
result = TIOCM_DTR | TIOCM_DSR
| ((status & MSVR_DTR) ? TIOCM_RTS : 0)
| ((status & MSVR_CD) ? TIOCM_CAR : 0)
|/* ((status & MSVR_DSR) ? */ TIOCM_DSR /* : 0) */
| ((status & MSVR_CTS) ? TIOCM_CTS : 0);
} else {
result = /* (status & MSVR_RTS) ? */ TIOCM_RTS /* : 0) */
result = TIOCM_RTS | TIOCM_DSR
| ((status & MSVR_DTR) ? TIOCM_DTR : 0)
| ((status & MSVR_CD) ? TIOCM_CAR : 0)
|/* ((status & MSVR_DSR) ? */ TIOCM_DSR /* : 0) */
| ((status & MSVR_CTS) ? TIOCM_CTS : 0);
}
@ -1905,24 +1794,14 @@ static int sx_tiocmset(struct tty_struct *tty, struct file *file,
bp = port_Board(port);
spin_lock_irqsave(&port->lock, flags);
/* if (set & TIOCM_RTS)
port->MSVR |= MSVR_RTS; */
/* if (set & TIOCM_DTR)
port->MSVR |= MSVR_DTR; */
if (SX_CRTSCTS(port->port.tty)) {
if (sx_crtscts(port->port.tty)) {
if (set & TIOCM_RTS)
port->MSVR |= MSVR_DTR;
} else {
if (set & TIOCM_DTR)
port->MSVR |= MSVR_DTR;
}
/* if (clear & TIOCM_RTS)
port->MSVR &= ~MSVR_RTS; */
/* if (clear & TIOCM_DTR)
port->MSVR &= ~MSVR_DTR; */
if (SX_CRTSCTS(port->port.tty)) {
if (sx_crtscts(port->port.tty)) {
if (clear & TIOCM_RTS)
port->MSVR &= ~MSVR_DTR;
} else {
@ -1939,7 +1818,7 @@ static int sx_tiocmset(struct tty_struct *tty, struct file *file,
}
static inline void sx_send_break(struct specialix_port *port,
static void sx_send_break(struct specialix_port *port,
unsigned long length)
{
struct specialix_board *bp = port_Board(port);
@ -1967,7 +1846,7 @@ static inline void sx_send_break(struct specialix_port *port,
}
static inline int sx_set_serial_info(struct specialix_port *port,
static int sx_set_serial_info(struct specialix_port *port,
struct serial_struct __user *newinfo)
{
struct serial_struct tmp;
@ -2015,7 +1894,7 @@ static inline int sx_set_serial_info(struct specialix_port *port,
}
static inline int sx_get_serial_info(struct specialix_port *port,
static int sx_get_serial_info(struct specialix_port *port,
struct serial_struct __user *retinfo)
{
struct serial_struct tmp;
@ -2112,7 +1991,7 @@ static void sx_throttle(struct tty_struct *tty)
bp = port_Board(port);
/* Use DTR instead of RTS ! */
if (SX_CRTSCTS(tty))
if (sx_crtscts(tty))
port->MSVR &= ~MSVR_DTR;
else {
/* Auch!!! I think the system shouldn't call this then. */
@ -2158,7 +2037,7 @@ static void sx_unthrottle(struct tty_struct *tty)
spin_lock_irqsave(&port->lock, flags);
/* XXXX Use DTR INSTEAD???? */
if (SX_CRTSCTS(tty))
if (sx_crtscts(tty))
port->MSVR |= MSVR_DTR;
/* Else clause: see remark in "sx_throttle"... */
spin_lock_irqsave(&bp->lock, flags);
@ -2381,11 +2260,11 @@ static int __init specialix_init(void)
printk(KERN_INFO "sx: Specialix IO8+ driver v" VERSION ", (c) R.E.Wolff 1997/1998.\n");
printk(KERN_INFO "sx: derived from work (c) D.Gorodchanin 1994-1996.\n");
#ifdef CONFIG_SPECIALIX_RTSCTS
printk(KERN_INFO "sx: DTR/RTS pin is always RTS.\n");
#else
printk(KERN_INFO "sx: DTR/RTS pin is RTS when CRTSCTS is on.\n");
#endif
if (sx_rtscts)
printk(KERN_INFO
"sx: DTR/RTS pin is RTS when CRTSCTS is on.\n");
else
printk(KERN_INFO "sx: DTR/RTS pin is always RTS.\n");
for (i = 0; i < SX_NBOARD; i++)
spin_lock_init(&sx_board[i].lock);
@ -2443,16 +2322,13 @@ static int __init specialix_init(void)
}
static int iobase[SX_NBOARD] = {0,};
static int irq [SX_NBOARD] = {0,};
static int irq[SX_NBOARD] = {0,};
module_param_array(iobase, int, NULL, 0);
module_param_array(irq, int, NULL, 0);
module_param(sx_debug, int, 0);
module_param(sx_rtscts, int, 0);
module_param(sx_rxfifo, int, 0);
#ifdef SPECIALIX_TIMER
module_param(sx_poll, int, 0);
#endif
/*
* You can setup up to 4 boards.
@ -2492,10 +2368,6 @@ static void __exit specialix_exit_module(void)
for (i = 0; i < SX_NBOARD; i++)
if (sx_board[i].flags & SX_BOARD_PRESENT)
sx_release_io_range(&sx_board[i]);
#ifdef SPECIALIX_TIMER
del_timer_sync(&missed_irq_timer);
#endif
func_exit();
}