static unsigned char mca_pc_read_pos(struct mca_device *mca_dev, int reg)
{
unsigned char byte;
unsigned long flags;
if (reg < 0 || reg >= 8)
return 0;
spin_lock_irqsave(&mca_lock, flags);
if (mca_dev->pos_register) {
/* Disable adapter setup, enable motherboard setup */
outb_p(0, MCA_ADAPTER_SETUP_REG);
outb_p(mca_dev->pos_register, MCA_MOTHERBOARD_SETUP_REG);
byte = inb_p(MCA_POS_REG(reg));
outb_p(0xff, MCA_MOTHERBOARD_SETUP_REG);
} else {
/* Make sure motherboard setup is off */
outb_p(0xff, MCA_MOTHERBOARD_SETUP_REG);
/* Read the appropriate register */
outb_p(0x8|(mca_dev->slot & 0xf), MCA_ADAPTER_SETUP_REG);
byte = inb_p(MCA_POS_REG(reg));
outb_p(0, MCA_ADAPTER_SETUP_REG);
}
spin_unlock_irqrestore(&mca_lock, flags);
mca_dev->pos[reg] = byte;
return byte;
}
static unsigned char mca_pc_read_pos(struct mca_device *mca_dev, int reg)
{
unsigned char byte;
unsigned long flags;
if (reg < 0 || reg >= 8)
return 0;
spin_lock_irqsave(&mca_lock, flags);
if (mca_dev->pos_register) {
outb_p(0, MCA_ADAPTER_SETUP_REG);
outb_p(mca_dev->pos_register, MCA_MOTHERBOARD_SETUP_REG);
byte = inb_p(MCA_POS_REG(reg));
outb_p(0xff, MCA_MOTHERBOARD_SETUP_REG);
} else {
outb_p(0xff, MCA_MOTHERBOARD_SETUP_REG);
outb_p(0x8|(mca_dev->slot & 0xf), MCA_ADAPTER_SETUP_REG);
byte = inb_p(MCA_POS_REG(reg));
outb_p(0, MCA_ADAPTER_SETUP_REG);
}
spin_unlock_irqrestore(&mca_lock, flags);
mca_dev->pos[reg] = byte;
return byte;
}
u_int8_t
mca_pos_get (device_t dev, u_int8_t reg)
{
u_int8_t slot = mca_get_slot(dev);
u_int8_t data = 0;
if ((slot > MCA_MAX_ADAPTERS) || (reg > MCA_POS7))
return (0);
/* Disable motherboard setup */
outb(MCA_MB_SETUP_REG, MCA_MB_SETUP_DIS);
switch (slot) {
case MCA_MB_SCSI_SLOT:
/* Disable adapter setup */
outb(MCA_ADAP_SETUP_REG, MCA_ADAP_SETUP_DIS);
/* Select motherboard video setup regs */
outb(MCA_MB_SETUP_REG, MCA_MB_SETUP_SCSI);
/* read the register */
data = inb(MCA_POS_REG(reg));
/* Disable motherboard setup */
outb(MCA_MB_SETUP_REG, MCA_MB_SETUP_DIS);
break;
case MCA_MB_VIDEO_SLOT:
/* Disable adapter setup */
outb(MCA_ADAP_SETUP_REG, MCA_ADAP_SETUP_DIS);
/* Select motherboard scsi setup regs */
outb(MCA_MB_SETUP_REG, MCA_MB_SETUP_VIDEO);
/* read the register */
data = inb(MCA_POS_REG(reg));
/* Disable motherboard setup */
outb(MCA_MB_SETUP_REG, MCA_MB_SETUP_DIS);
break;
default:
/* Select adapter setup regs */
outb(MCA_ADAP_SETUP_REG,
((slot & 0x0f) | MCA_ADAP_SET));
/* read the register */
data = inb(MCA_POS_REG(reg));
/* Disable adapter setup */
outb(MCA_ADAP_SETUP_REG, MCA_ADAP_SETUP_DIS);
break;
}
return (data);
}
unsigned char mca_read_pos( int slot, int reg )
{
unsigned int byte = 0;
unsigned long flags;
if( slot < 0 || slot >= MCA_NUMADAPTERS || mca_info == 0 ) return 0;
if( reg < 0 || reg >= 8 ) return 0;
save_flags( flags );
cli();
/* make sure motherboard setup is off */
outb_p(0xff, MCA_MOTHERBOARD_SETUP_REG);
/* read in the appropriate register */
if( slot == MCA_INTEGSCSI && mca_info->which_scsi ) {
/* disable adapter setup, enable motherboard setup */
outb_p(0, MCA_ADAPTER_SETUP_REG);
outb_p(mca_info->which_scsi, MCA_MOTHERBOARD_SETUP_REG);
byte = inb_p(MCA_POS_REG(reg));
outb_p(0xff, MCA_MOTHERBOARD_SETUP_REG);
} else if( slot == MCA_INTEGVIDEO ) {
/* disable adapter setup, enable motherboard setup */
outb_p(0, MCA_ADAPTER_SETUP_REG);
outb_p(0xdf, MCA_MOTHERBOARD_SETUP_REG);
byte = inb_p(MCA_POS_REG(reg));
outb_p(0xff, MCA_MOTHERBOARD_SETUP_REG);
} else if( slot < MCA_MAX_SLOT_NR ) {
/* make sure motherboard setup is off */
outb_p(0xff, MCA_MOTHERBOARD_SETUP_REG);
/* read the appropriate register */
outb_p(0x8|(slot&0xf), MCA_ADAPTER_SETUP_REG);
byte = inb_p(MCA_POS_REG(reg));
outb_p(0, MCA_ADAPTER_SETUP_REG);
}
/* make sure the stored values are consistent, while we're here */
mca_info->slot[slot].pos[reg] = byte;
restore_flags( flags );
return byte;
} /* mca_read_pos() */
static void mca_pc_write_pos(struct mca_device *mca_dev, int reg,
unsigned char byte)
{
unsigned long flags;
if (reg < 0 || reg >= 8)
return;
spin_lock_irqsave(&mca_lock, flags);
/* Make sure motherboard setup is off */
outb_p(0xff, MCA_MOTHERBOARD_SETUP_REG);
/* Read in the appropriate register */
outb_p(0x8|(mca_dev->slot&0xf), MCA_ADAPTER_SETUP_REG);
outb_p(byte, MCA_POS_REG(reg));
outb_p(0, MCA_ADAPTER_SETUP_REG);
spin_unlock_irqrestore(&mca_lock, flags);
/* Update the global register list, while we have the byte */
mca_dev->pos[reg] = byte;
}
/* Not supposed to use this function! */
void
mca_pos_set (device_t dev, u_int8_t reg, u_int8_t data)
{
struct mca_device * m_dev = device_get_ivars(dev);
u_int8_t slot = mca_get_slot(dev);
if ((slot > MCA_MAX_ADAPTERS) || (reg > MCA_POS7))
return;
/* Disable motherboard setup */
outb(MCA_MB_SETUP_REG, MCA_MB_SETUP_DIS);
/* Select adapter setup regs */
outb(MCA_ADAP_SETUP_REG, ((slot & 0x0f) | MCA_ADAP_SET));
/* Write the register */
outb(MCA_POS_REG(reg), data);
/* Disable adapter setup */
outb(MCA_ADAP_SETUP_REG, MCA_ADAP_SETUP_DIS);
/* Update the IVAR copy */
m_dev->pos[reg] = data;
return;
}
void mca_write_pos( int slot, int reg, unsigned char byte )
{
unsigned long flags;
if( slot < 0 || slot >= MCA_MAX_SLOT_NR ) return;
if( reg < 0 || reg >= 8 ) return;
if (mca_info == 0 ) return;
save_flags( flags );
cli();
/* make sure motherboard setup is off */
outb_p(0xff, MCA_MOTHERBOARD_SETUP_REG);
/* read in the appropriate register */
outb_p(0x8|(slot&0xf), MCA_ADAPTER_SETUP_REG);
outb_p( byte, MCA_POS_REG(reg) );
outb_p(0, MCA_ADAPTER_SETUP_REG);
restore_flags( flags );
/* update the global register list, while we have the byte */
mca_info->slot[slot].pos[reg] = byte;
} /* mca_write_pos() */
static void mca_pc_write_pos(struct mca_device *mca_dev, int reg,
unsigned char byte)
{
unsigned long flags;
if (reg < 0 || reg >= 8)
return;
spin_lock_irqsave(&mca_lock, flags);
outb_p(0xff, MCA_MOTHERBOARD_SETUP_REG);
outb_p(0x8|(mca_dev->slot&0xf), MCA_ADAPTER_SETUP_REG);
outb_p(byte, MCA_POS_REG(reg));
outb_p(0, MCA_ADAPTER_SETUP_REG);
spin_unlock_irqrestore(&mca_lock, flags);
mca_dev->pos[reg] = byte;
}
void
mca_conf_write(mca_chipset_tag_t mc, int slot, int reg, int data)
{
slot&=7; /* slot must be in range 0-7 */
outb(MCA_MB_SETUP_REG, 0xff); /* ensure m/board setup is disabled */
outb(MCA_ADAP_SETUP_REG, slot | MCA_ADAP_SET);
outb(MCA_POS_REG(reg), data);
outb(MCA_ADAP_SETUP_REG, 0);
}
int
mca_conf_read(mca_chipset_tag_t mc, int slot, int reg)
{
int data;
slot &= 7; /* slot must be in range 0-7 */
outb(MCA_MB_SETUP_REG, 0xff); /* ensure m/board setup is disabled */
outb(MCA_ADAP_SETUP_REG, slot | MCA_ADAP_SET);
data = inb(MCA_POS_REG(reg));
outb(MCA_ADAP_SETUP_REG, 0);
return data;
}
/*
* Handle a NMI.
* return true to panic system, false to ignore.
*/
int
mca_nmi(void)
{
/*
* PS/2 MCA devices can generate NMIs - we can find out which
* slot generated it from the POS registers.
*/
int slot, mcanmi=0;
/* if there is no MCA bus, call x86_nmi() */
if (!MCA_system)
goto out;
/* ensure motherboard setup is disabled */
outb(MCA_MB_SETUP_REG, 0xff);
/* find if an MCA slot has the CHCK bit asserted (low) in POS 5 */
for(slot=0; slot<MCA_MAX_SLOTS; slot++) {
outb(MCA_ADAP_SETUP_REG, slot | MCA_ADAP_SET);
if ((inb(MCA_POS_REG(5)) & MCA_POS5_CHCK) == 0) {
mcanmi = 1;
/* find if CHCK status is available in POS 6/7 */
if((inb(MCA_POS_REG(5)) & MCA_POS5_CHCK_STAT) == 0)
log(LOG_CRIT, "MCA NMI: slot %d, POS6=0x%02x, POS7=0x%02x\n",
slot+1, inb(MCA_POS_REG(6)),
inb(MCA_POS_REG(7)));
else
log(LOG_CRIT, "MCA NMI: slot %d\n", slot+1);
}
}
outb(MCA_ADAP_SETUP_REG, 0);
out:
if (!mcanmi) {
/* no CHCK bits asserted, assume ISA NMI */
return (x86_nmi());
} else
return(0);
}
int
mca_bus_nmi (void)
{
int slot;
int retval = 0;
int pos5 = 0;
/* Disable motherboard setup */
outb(MCA_MB_SETUP_REG, MCA_MB_SETUP_DIS);
/* For each slot */
for (slot = 0; slot < MCA_MAX_SLOTS; slot++) {
/* Select the slot */
outb(MCA_ADAP_SETUP_REG, slot | MCA_ADAP_SET);
pos5 = inb(MCA_POS_REG(MCA_POS5));
/* If Adapter Check is low */
if ((pos5 & MCA_POS5_CHCK) == 0) {
retval++;
/* If Adapter Check Status is available */
if ((pos5 & MCA_POS5_CHCK_STAT) == 0) {
printf("MCA NMI: slot %d, POS6=0x%02x, POS7=0x%02x\n",
slot+1,
inb( MCA_POS_REG(MCA_POS6) ),
inb( MCA_POS_REG(MCA_POS7) ));
} else {
printf("MCA NMI: slot %d\n", slot+1);
}
}
/* Disable adapter setup */
outb(MCA_ADAP_SETUP_REG, MCA_ADAP_SETUP_DIS);
}
return (retval);
}
static int mca_read_and_store_pos(unsigned char *pos)
{
int j;
int found = 0;
for (j = 0; j < 8; j++) {
pos[j] = inb_p(MCA_POS_REG(j));
if (pos[j] != 0xff) {
found = 1;
}
}
return found;
}
/**
* mca_read_and_store_pos - read the POS registers into a memory buffer
* @pos: a char pointer to 8 bytes, contains the POS register value on
* successful return
*
* Returns 1 if a card actually exists (i.e. the pos isn't
* all 0xff) or 0 otherwise
*/
static int mca_read_and_store_pos(unsigned char *pos) {
int j;
int found = 0;
for(j=0; j<8; j++) {
if((pos[j] = inb_p(MCA_POS_REG(j))) != 0xff) {
/* 0xff all across means no device. 0x00 means
* something's broken, but a device is
* probably there. However, if you get 0x00
* from a motherboard register it won't matter
* what we find. For the record, on the
* 57SLC, the integrated SCSI adapter has
* 0xffff for the adapter ID, but nonzero for
* other registers. */
found = 1;
}
}
return found;
}
__initfunc(void mca_init(void))
{
unsigned int i, j;
unsigned long flags;
/* WARNING: Be careful when making changes here. Putting an adapter
* and the motherboard simultaneously into setup mode may result in
* damage to chips (according to The Indispensible PC Hardware Book
* by Hans-Peter Messmer). Also, we disable system interrupts (so
* that we are not disturbed in the middle of this).
*/
/* Make sure the MCA bus is present */
if (!MCA_bus)
return;
printk( "Micro Channel bus detected.\n" );
save_flags( flags );
cli();
/* Allocate MCA_info structure (at address divisible by 8) */
mca_info = kmalloc(sizeof(struct MCA_info), GFP_ATOMIC);
/* Make sure adapter setup is off */
outb_p(0, MCA_ADAPTER_SETUP_REG);
/* Put motherboard into video setup mode, read integrated video
* pos registers, and turn motherboard setup off.
*/
outb_p(0xdf, MCA_MOTHERBOARD_SETUP_REG);
mca_info->slot[MCA_INTEGVIDEO].name[0] = 0;
for (j=0; j<8; j++) {
mca_info->slot[MCA_INTEGVIDEO].pos[j] = inb_p(MCA_POS_REG(j));
}
mca_configure_adapter_status(MCA_INTEGVIDEO);
/* Put motherboard into scsi setup mode, read integrated scsi
* pos registers, and turn motherboard setup off.
*
* It seems there are two possible SCSI registers. Martin says that
* for the 56,57, 0xf7 is the one, but fails on the 76.
* Alfredo ([email protected]) says
* 0xfd works on his machine. We'll try both of them. I figure it's
* a good bet that only one could be valid at a time. This could
* screw up though if one is used for something else on the other
* machine.
*/
outb_p(0xf7, MCA_MOTHERBOARD_SETUP_REG);
mca_info->slot[MCA_INTEGSCSI].name[0] = 0;
for (j=0; j<8; j++) {
if( (mca_info->slot[MCA_INTEGSCSI].pos[j] = inb_p(MCA_POS_REG(j))) != 0xff )
{
/* 0xff all across means no device. 0x00 means something's
* broken, but a device is probably there. However, if you get
* 0x00 from a motherboard register it won't matter what we
* find. For the record, on the 57SLC, the integrated SCSI
* adapter has 0xffff for the adapter ID, but nonzero for
* other registers.
*/
mca_info->which_scsi = 0xf7;
}
}
if( !mca_info->which_scsi ) {
/* Didn't find it at 0xf7, try somewhere else... */
mca_info->which_scsi = 0xfd;
outb_p(0xfd, MCA_MOTHERBOARD_SETUP_REG);
for (j=0; j<8; j++)
mca_info->slot[MCA_INTEGSCSI].pos[j] = inb_p(MCA_POS_REG(j));
}
mca_configure_adapter_status(MCA_INTEGSCSI);
/* turn off motherboard setup */
outb_p(0xff, MCA_MOTHERBOARD_SETUP_REG);
/* Now loop over MCA slots: put each adapter into setup mode, and
* read its pos registers. Then put adapter setup off.
*/
for (i=0; i<MCA_MAX_SLOT_NR; i++) {
outb_p(0x8|(i&0xf), MCA_ADAPTER_SETUP_REG);
for (j=0; j<8; j++) {
mca_info->slot[i].pos[j]=inb_p(MCA_POS_REG(j));
}
mca_info->slot[i].name[0] = 0;
mca_info->slot[i].driver_loaded = 0;
mca_configure_adapter_status(i);
}
outb_p(0, MCA_ADAPTER_SETUP_REG);
/* Enable interrupts and return memory start */
restore_flags( flags );
request_region(0x60,0x01,"system control port B (MCA)");
request_region(0x90,0x01,"arbitration (MCA)");
request_region(0x91,0x01,"card Select Feedback (MCA)");
request_region(0x92,0x01,"system Control port A (MCA)");
request_region(0x94,0x01,"system board setup (MCA)");
request_region(0x96,0x02,"POS (MCA)");
request_region(0x100,0x08,"POS (MCA)");
#ifdef CONFIG_PROC_FS
mca_do_proc_init();
#endif
}
