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:
parent
a72492bd8a
commit
d2fbd0f2f9
3 changed files with 47 additions and 187 deletions
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@ -270,8 +270,8 @@ The pinout of the connectors on the IO8+ is:
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Hardware handshaking issues.
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============================
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The driver can be compiled in two different ways. The default
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("Specialix DTR/RTS pin is RTS" is off) the pin behaves as DTR when
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The driver can be told to operate in two different ways. The default
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behaviour is specialix.sx_rtscts = 0 where the pin behaves as DTR when
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hardware handshaking is off. It behaves as the RTS hardware
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handshaking signal when hardware handshaking is selected.
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@ -280,7 +280,7 @@ cable will either be compatible with hardware handshaking or with
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software handshaking. So switching on the fly is not really an
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option.
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I actually prefer to use the "Specialix DTR/RTS pin is RTS" option.
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I actually prefer to use the "specialix.sx_rtscts=1" option.
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This makes the DTR/RTS pin always an RTS pin, and ioctls to
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change DTR are always ignored. I have a cable that is configured
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for this.
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@ -379,7 +379,5 @@ it doesn't fit in your computer, bring back the card.
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You have to WRITE to the address register to even
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read-probe a CD186x register. Disable autodetection?
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-- Specialix: any suggestions?
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- Arbitrary baud rates are not implemented yet.
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If you need this, bug me about it.
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@ -300,16 +300,6 @@ config SPECIALIX
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and compile this driver as kernel loadable module which will be
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called specialix.
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config SPECIALIX_RTSCTS
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bool "Specialix DTR/RTS pin is RTS"
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depends on SPECIALIX
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help
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The Specialix IO8+ card can only support either RTS or DTR. If you
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say N here, the driver will use the pin as "DTR" when the tty is in
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software handshake mode. If you say Y here or hardware handshake is
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on, it will always be RTS. Read the file
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<file:Documentation/specialix.txt> for more information.
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config SX
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tristate "Specialix SX (and SI) card support"
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depends on SERIAL_NONSTANDARD && (PCI || EISA || ISA)
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@ -110,6 +110,7 @@
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static int sx_debug;
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static int sx_rxfifo = SPECIALIX_RXFIFO;
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static int sx_rtscts;
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#ifdef DEBUG
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#define dprintk(f, str...) if (sx_debug & f) printk(str)
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@ -134,25 +135,12 @@ static int sx_rxfifo = SPECIALIX_RXFIFO;
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#define func_enter() dprintk(SX_DEBUG_FLOW, "io8: enter %s\n", __func__)
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#define func_exit() dprintk(SX_DEBUG_FLOW, "io8: exit %s\n", __func__)
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#define jiffies_from_ms(a) ((((a) * HZ)/1000)+1)
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/* Configurable options: */
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/* Am I paranoid or not ? ;-) */
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#define SPECIALIX_PARANOIA_CHECK
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/* Do I trust the IRQ from the card? (enabeling it doesn't seem to help)
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When the IRQ routine leaves the chip in a state that is keeps on
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requiring attention, the timer doesn't help either. */
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#undef SPECIALIX_TIMER
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#ifdef SPECIALIX_TIMER
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static int sx_poll = HZ;
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#endif
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/*
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* The following defines are mostly for testing purposes. But if you need
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* some nice reporting in your syslog, you can define them also.
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@ -162,16 +150,6 @@ static int sx_poll = HZ;
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#ifdef CONFIG_SPECIALIX_RTSCTS
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#define SX_CRTSCTS(bla) 1
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#else
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#define SX_CRTSCTS(tty) C_CRTSCTS(tty)
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#endif
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/* Used to be outb(0xff, 0x80); */
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#define short_pause() udelay(1)
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#define SPECIALIX_LEGAL_FLAGS \
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(ASYNC_HUP_NOTIFY | ASYNC_SAK | ASYNC_SPLIT_TERMIOS | \
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@ -190,14 +168,7 @@ static struct specialix_board sx_board[SX_NBOARD] = {
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static struct specialix_port sx_port[SX_NBOARD * SX_NPORT];
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#ifdef SPECIALIX_TIMER
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static struct timer_list missed_irq_timer;
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static irqreturn_t sx_interrupt(int irq, void *dev_id);
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#endif
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static inline int sx_paranoia_check(struct specialix_port const *port,
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static int sx_paranoia_check(struct specialix_port const *port,
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char *name, const char *routine)
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{
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#ifdef SPECIALIX_PARANOIA_CHECK
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@ -288,7 +259,7 @@ static inline void sx_out_off(struct specialix_board *bp,
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/* Wait for Channel Command Register ready */
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static inline void sx_wait_CCR(struct specialix_board *bp)
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static void sx_wait_CCR(struct specialix_board *bp)
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{
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unsigned long delay, flags;
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unsigned char ccr;
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@ -307,7 +278,7 @@ static inline void sx_wait_CCR(struct specialix_board *bp)
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/* Wait for Channel Command Register ready */
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static inline void sx_wait_CCR_off(struct specialix_board *bp)
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static void sx_wait_CCR_off(struct specialix_board *bp)
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{
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unsigned long delay;
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unsigned char crr;
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@ -330,7 +301,7 @@ static inline void sx_wait_CCR_off(struct specialix_board *bp)
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* specialix IO8+ IO range functions.
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*/
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static inline int sx_request_io_range(struct specialix_board *bp)
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static int sx_request_io_range(struct specialix_board *bp)
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{
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return request_region(bp->base,
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bp->flags & SX_BOARD_IS_PCI ? SX_PCI_IO_SPACE : SX_IO_SPACE,
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@ -338,7 +309,7 @@ static inline int sx_request_io_range(struct specialix_board *bp)
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}
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static inline void sx_release_io_range(struct specialix_board *bp)
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static void sx_release_io_range(struct specialix_board *bp)
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{
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release_region(bp->base, bp->flags & SX_BOARD_IS_PCI ?
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SX_PCI_IO_SPACE : SX_IO_SPACE);
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@ -440,36 +411,10 @@ static int read_cross_byte(struct specialix_board *bp, int reg, int bit)
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}
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#ifdef SPECIALIX_TIMER
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void missed_irq(unsigned long data)
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{
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unsigned char irq;
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unsigned long flags;
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struct specialix_board *bp = (struct specialix_board *)data;
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spin_lock_irqsave(&bp->lock, flags);
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irq = sx_in((struct specialix_board *)data, CD186x_SRSR) &
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(SRSR_RREQint | SRSR_TREQint | SRSR_MREQint);
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spin_unlock_irqrestore(&bp->lock, flags);
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if (irq) {
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printk(KERN_INFO
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"Missed interrupt... Calling int from timer. \n");
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sx_interrupt(-1, bp);
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}
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mod_timer(&missed_irq_timer, jiffies + sx_poll);
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}
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#endif
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/* Main probing routine, also sets irq. */
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static int sx_probe(struct specialix_board *bp)
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{
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unsigned char val1, val2;
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#if 0
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int irqs = 0;
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int retries;
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#endif
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int rev;
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int chip;
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@ -482,15 +427,15 @@ static int sx_probe(struct specialix_board *bp)
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/* Are the I/O ports here ? */
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sx_out_off(bp, CD186x_PPRL, 0x5a);
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short_pause();
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udelay(1);
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val1 = sx_in_off(bp, CD186x_PPRL);
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sx_out_off(bp, CD186x_PPRL, 0xa5);
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short_pause();
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udelay(1);
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val2 = sx_in_off(bp, CD186x_PPRL);
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if ((val1 != 0x5a) || (val2 != 0xa5)) {
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if (val1 != 0x5a || val2 != 0xa5) {
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printk(KERN_INFO
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"sx%d: specialix IO8+ Board at 0x%03x not found.\n",
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board_No(bp), bp->base);
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@ -522,50 +467,6 @@ static int sx_probe(struct specialix_board *bp)
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}
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#if 0
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/* It's time to find IRQ for this board */
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for (retries = 0; retries < 5 && irqs <= 0; retries++) {
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irqs = probe_irq_on();
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sx_init_CD186x(bp); /* Reset CD186x chip */
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sx_out(bp, CD186x_CAR, 2); /* Select port 2 */
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sx_wait_CCR(bp);
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sx_out(bp, CD186x_CCR, CCR_TXEN); /* Enable transmitter */
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sx_out(bp, CD186x_IER, IER_TXRDY); /* Enable tx empty intr */
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msleep(50);
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irqs = probe_irq_off(irqs);
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dprintk(SX_DEBUG_INIT, "SRSR = %02x, ", sx_in(bp, CD186x_SRSR));
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dprintk(SX_DEBUG_INIT, "TRAR = %02x, ", sx_in(bp, CD186x_TRAR));
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dprintk(SX_DEBUG_INIT, "GIVR = %02x, ", sx_in(bp, CD186x_GIVR));
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dprintk(SX_DEBUG_INIT, "GICR = %02x, ", sx_in(bp, CD186x_GICR));
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dprintk(SX_DEBUG_INIT, "\n");
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/* Reset CD186x again */
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if (!sx_init_CD186x(bp)) {
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/* Hmmm. This is dead code anyway. */
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}
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dprintk(SX_DEBUG_INIT
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"val1 = %02x, val2 = %02x, val3 = %02x.\n",
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val1, val2, val3);
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}
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#if 0
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if (irqs <= 0) {
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printk(KERN_ERR
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"sx%d: Can't find IRQ for specialix IO8+ board at 0x%03x.\n",
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board_No(bp), bp->base);
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sx_release_io_range(bp);
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func_exit();
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return 1;
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}
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#endif
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printk(KERN_INFO "Started with irq=%d, but now have irq=%d.\n",
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bp->irq, irqs);
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if (irqs > 0)
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bp->irq = irqs;
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#endif
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/* Reset CD186x again */
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if (!sx_init_CD186x(bp)) {
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sx_release_io_range(bp);
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dprintk(SX_DEBUG_INIT, " GFCR = 0x%02x\n", sx_in_off(bp, CD186x_GFRCR));
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#ifdef SPECIALIX_TIMER
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setup_timer(&missed_irq_timer, missed_irq, (unsigned long)bp);
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mod_timer(&missed_irq_timer, jiffies + sx_poll);
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#endif
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printk(KERN_INFO
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"sx%d: specialix IO8+ board detected at 0x%03x, IRQ %d, CD%d Rev. %c.\n",
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board_No(bp), bp->base, bp->irq, chip, rev);
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@ -628,7 +524,7 @@ static int sx_probe(struct specialix_board *bp)
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* Interrupt processing routines.
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* */
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static inline struct specialix_port *sx_get_port(struct specialix_board *bp,
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static struct specialix_port *sx_get_port(struct specialix_board *bp,
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unsigned char const *what)
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{
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unsigned char channel;
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@ -654,7 +550,7 @@ static inline struct specialix_port *sx_get_port(struct specialix_board *bp,
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}
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static inline void sx_receive_exc(struct specialix_board *bp)
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static void sx_receive_exc(struct specialix_board *bp)
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{
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struct specialix_port *port;
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struct tty_struct *tty;
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@ -729,7 +625,7 @@ static inline void sx_receive_exc(struct specialix_board *bp)
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}
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static inline void sx_receive(struct specialix_board *bp)
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static void sx_receive(struct specialix_board *bp)
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{
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struct specialix_port *port;
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struct tty_struct *tty;
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@ -758,7 +654,7 @@ static inline void sx_receive(struct specialix_board *bp)
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}
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static inline void sx_transmit(struct specialix_board *bp)
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static void sx_transmit(struct specialix_board *bp)
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{
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struct specialix_port *port;
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struct tty_struct *tty;
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}
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static inline void sx_check_modem(struct specialix_board *bp)
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static void sx_check_modem(struct specialix_board *bp)
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{
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struct specialix_port *port;
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struct tty_struct *tty;
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tty = port->port.tty;
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mcr = sx_in(bp, CD186x_MCR);
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printk("mcr = %02x.\n", mcr); /* FIXME */
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if ((mcr & MCR_CDCHG)) {
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dprintk(SX_DEBUG_SIGNALS, "CD just changed... ");
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@ -983,13 +878,6 @@ static void turn_ints_off(struct specialix_board *bp)
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unsigned long flags;
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func_enter();
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if (bp->flags & SX_BOARD_IS_PCI) {
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/* This was intended for enabeling the interrupt on the
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* PCI card. However it seems that it's already enabled
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* and as PCI interrupts can be shared, there is no real
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* reason to have to turn it off. */
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}
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spin_lock_irqsave(&bp->lock, flags);
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(void) sx_in_off(bp, 0); /* Turn off interrupts. */
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spin_unlock_irqrestore(&bp->lock, flags);
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@ -1003,9 +891,6 @@ static void turn_ints_on(struct specialix_board *bp)
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func_enter();
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if (bp->flags & SX_BOARD_IS_PCI) {
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/* play with the PCI chip. See comment above. */
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}
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spin_lock_irqsave(&bp->lock, flags);
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(void) sx_in(bp, 0); /* Turn ON interrupts. */
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spin_unlock_irqrestore(&bp->lock, flags);
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@ -1015,7 +900,7 @@ static void turn_ints_on(struct specialix_board *bp)
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/* Called with disabled interrupts */
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static inline int sx_setup_board(struct specialix_board *bp)
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static int sx_setup_board(struct specialix_board *bp)
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{
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int error;
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@ -1040,7 +925,7 @@ static inline int sx_setup_board(struct specialix_board *bp)
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/* Called with disabled interrupts */
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static inline void sx_shutdown_board(struct specialix_board *bp)
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static void sx_shutdown_board(struct specialix_board *bp)
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{
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func_enter();
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func_exit();
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}
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static unsigned int sx_crtscts(struct tty_struct *tty)
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{
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if (sx_rtscts)
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return C_CRTSCTS(tty);
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return 1;
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}
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/*
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* Setting up port characteristics.
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@ -1090,7 +981,7 @@ static void sx_change_speed(struct specialix_board *bp,
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/* The Specialix board doens't implement the RTS lines.
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They are used to set the IRQ level. Don't touch them. */
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if (SX_CRTSCTS(tty))
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if (sx_crtscts(tty))
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port->MSVR = MSVR_DTR | (sx_in(bp, CD186x_MSVR) & MSVR_RTS);
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else
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port->MSVR = (sx_in(bp, CD186x_MSVR) & MSVR_RTS);
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@ -1108,7 +999,7 @@ static void sx_change_speed(struct specialix_board *bp,
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if (!baud) {
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/* Drop DTR & exit */
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dprintk(SX_DEBUG_TERMIOS, "Dropping DTR... Hmm....\n");
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if (!SX_CRTSCTS(tty)) {
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if (!sx_crtscts(tty)) {
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port->MSVR &= ~MSVR_DTR;
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spin_lock_irqsave(&bp->lock, flags);
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sx_out(bp, CD186x_MSVR, port->MSVR);
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@ -1118,7 +1009,7 @@ static void sx_change_speed(struct specialix_board *bp,
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return;
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} else {
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/* Set DTR on */
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if (!SX_CRTSCTS(tty))
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if (!sx_crtscts(tty))
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port->MSVR |= MSVR_DTR;
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}
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@ -1448,7 +1339,7 @@ static int block_til_ready(struct tty_struct *tty, struct file *filp,
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spin_lock_irqsave(&bp->lock, flags);
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sx_out(bp, CD186x_CAR, port_No(port));
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CD = sx_in(bp, CD186x_MSVR) & MSVR_CD;
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if (SX_CRTSCTS(tty)) {
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if (sx_crtscts(tty)) {
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/* Activate RTS */
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port->MSVR |= MSVR_DTR; /* WTF? */
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sx_out(bp, CD186x_MSVR, port->MSVR);
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@ -1600,7 +1491,7 @@ static void sx_close(struct tty_struct *tty, struct file *filp)
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}
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bp = port_Board(port);
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if ((tty->count == 1) && (port->port.count != 1)) {
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if (tty->count == 1 && port->port.count != 1) {
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printk(KERN_ERR "sx%d: sx_close: bad port count;"
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" tty->count is 1, port count is %d\n",
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board_No(bp), port->port.count);
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@ -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();
|
||||
}
|
||||
|
||||
|
|
Loading…
Reference in a new issue