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