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Reduce binary size by factoring out common parameterised calls to

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udelay().
This commit is contained in:
Michael Brown 2005-04-15 13:18:54 +00:00
parent 85dd4fd8d6
commit 120192e8d1
1 changed files with 19 additions and 13 deletions
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32
src/drivers/bus/isapnp.c
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@ -133,11 +133,16 @@ static inline void isapnp_deactivate ( uint8_t logdev ) {
isapnp_write_byte ( ISAPNP_ACTIVATE, 0 );
}
static void isapnp_delay ( void ) {
udelay ( 1000 );
}
/*
* The linear feedback shift register as described in Appendix B of
* the PnP ISA spec. The hardware implementation uses eight D-type
* latches and two XOR gates. I think this is probably the smallest
* possible implementation in software. :)
* possible implementation in software. Six instructions when input_bit
* is a constant 0 (for isapnp_send_key). :)
*
*/
static inline uint8_t isapnp_lfsr_next ( uint8_t lfsr, int input_bit ) {
@ -156,12 +161,12 @@ static void isapnp_send_key ( void ) {
unsigned int i;
uint8_t lfsr;
udelay ( 1000 );
isapnp_delay();
isapnp_write_address ( 0x00 );
isapnp_write_address ( 0x00 );
lfsr = ISAPNP_LFSR_SEED;
for ( i = 0 ; i < 32 ; i-- ) {
for ( i = 0 ; i < 32 ; i++ ) {
isapnp_write_address ( lfsr );
lfsr = isapnp_lfsr_next ( lfsr, 0 );
}
@ -200,7 +205,7 @@ static inline uint8_t isapnp_peek_byte ( void ) {
/* Byte ready - read it */
return isapnp_read_resourcedata();
}
udelay ( 100 );
isapnp_delay ();
}
/* Data never became ready - return 0xff */
return 0xff;
@ -249,7 +254,8 @@ static int isapnp_try_isolate ( void ) {
/* Reset all assigned CSNs */
isapnp_reset_csn ();
isapnp_max_csn = 0;
udelay ( 2000 );
isapnp_delay();
isapnp_delay();
/* Place all cards into the Isolation state */
isapnp_wait_for_key ();
@ -258,7 +264,7 @@ static int isapnp_try_isolate ( void ) {
/* Set the read port */
isapnp_set_read_port ();
udelay ( 1000 );
isapnp_delay();
while ( 1 ) {
@ -269,7 +275,7 @@ static int isapnp_try_isolate ( void ) {
/* Initiate serial isolation */
isapnp_serialisolation ();
udelay ( 1000 );
isapnp_delay();
/* Read identifier serially via the ISAPnP read port. */
memset ( &identifier, 0, sizeof ( identifier ) );
@ -278,9 +284,9 @@ static int isapnp_try_isolate ( void ) {
byte = 0;
for ( j = 0 ; j < 8 ; j++ ) {
data = isapnp_read_data ();
udelay ( 1000 );
isapnp_delay();
data = ( data << 8 ) | isapnp_read_data ();
udelay ( 1000 );
isapnp_delay();
if ( data == 0x55aa ) {
byte |= 1;
}
@ -309,13 +315,13 @@ static int isapnp_try_isolate ( void ) {
identifier.checksum, isapnp_max_csn );
isapnp_write_csn ( isapnp_max_csn );
udelay ( 1000 );
isapnp_delay();
/* Send this card back to Sleep and force all cards
* without a CSN into Isolation state
*/
isapnp_wake ( 0x00 );
udelay ( 1000 );
isapnp_delay();
}
/* Place all cards in Wait for Key state */
@ -484,7 +490,7 @@ void activate_isapnp_device ( struct isapnp_device *isapnp,
/* Select the specified logical device */
isapnp_activate ( logdev );
udelay ( 1000 );
isapnp_delay();
/* Return all cards to Wait for Key state */
isapnp_wait_for_key ();
@ -503,7 +509,7 @@ void deactivate_isapnp_device ( struct isapnp_device *isapnp,
/* Select the specified logical device */
isapnp_deactivate ( logdev );
udelay ( 1000 );
isapnp_delay();
/* Return all cards to Wait for Key state */
isapnp_wait_for_key ();