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Read current ioaddr and irqno from PnP registers.

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This commit is contained in:
Michael Brown
2005-04-15 14:27:49 +00:00
parent ab443ba4b0
commit 888277d2d1
2 changed files with 33 additions and 2 deletions
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30
src/drivers/bus/isapnp.c
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@@ -87,6 +87,12 @@ static inline uint8_t isapnp_read_byte ( uint8_t address ) {
return isapnp_read_data ();
}
static inline uint16_t isapnp_read_word ( uint8_t address ) {
/* Yes, they're in big-endian order */
return ( ( isapnp_read_byte ( address ) << 8 )
+ isapnp_read_byte ( address + 1 ) );
}
static inline void isapnp_set_read_port ( void ) {
isapnp_write_byte ( ISAPNP_READPORT, isapnp_read_port >> 2 );
}
@@ -133,6 +139,14 @@ static inline void isapnp_deactivate ( uint8_t logdev ) {
isapnp_write_byte ( ISAPNP_ACTIVATE, 0 );
}
static inline uint16_t isapnp_read_iobase ( unsigned int index ) {
return isapnp_read_word ( ISAPNP_IOBASE ( index ) );
}
static inline uint8_t isapnp_read_irqno ( unsigned int index ) {
return isapnp_read_byte ( ISAPNP_IRQNO ( index ) );
}
static void isapnp_delay ( void ) {
udelay ( 1000 );
}
@@ -388,6 +402,13 @@ static int fill_isapnp_device ( struct isapnp_device *isapnp ) {
isapnp->vendor_id = identifier.vendor_id;
isapnp->prod_id = identifier.prod_id;
/* I/O addresses and IRQs are associated with logical devices,
* not with cards. They will be assigned when
* activate_isapnp_device() is called.
*/
isapnp->ioaddr = 0;
isapnp->irqno = 0;
/* Return all cards to Wait for Key state */
isapnp_wait_for_key ();
@@ -471,7 +492,8 @@ int find_isapnp_boot_device ( struct dev *dev, struct isapnp_driver *driver ) {
}
/*
* Activate a logical function on an ISAPnP device
* Activate a logical function on an ISAPnP device, and fill in the
* ioaddr and irqno fields in the isapnp struct.
*
* This routine simply activates the device in its current
* configuration. It does not attempt any kind of resource
@@ -488,6 +510,10 @@ void activate_isapnp_device ( struct isapnp_device *isapnp,
/* Select the specified logical device */
isapnp_activate ( logdev );
isapnp_delay();
/* Read the current ioaddr and irqno */
isapnp->ioaddr = isapnp_read_iobase ( 0 );
isapnp->irqno = isapnp_read_irqno ( 0 );
/* Return all cards to Wait for Key state */
isapnp_wait_for_key ();
@@ -498,7 +524,7 @@ void activate_isapnp_device ( struct isapnp_device *isapnp,
*
*/
void deactivate_isapnp_device ( struct isapnp_device *isapnp,
uint8_t logdev ) {
uint8_t logdev ) {
/* Wake the device */
isapnp_wait_for_key ();
isapnp_send_key ();