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ce6232a085
freebsd-skq/sys/pccard/pcic.c
nate ce6232a085 Removed un-used code.
1996-02-21 23:31:03 +00:00

862 lines
20 KiB
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/*
* Intel PCIC or compatible Controller driver
* May be built using LKM to make a loadable module.
*-------------------------------------------------------------------------
*
* Copyright (c) 1995 Andrew McRae. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef LKM
#define NPCIC 1
#else
#include "pcic.h"
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/errno.h>
#include <sys/file.h>
#include <sys/conf.h>
#include <sys/proc.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/sysent.h>
#include <sys/exec.h>
#include <sys/lkm.h>
#include <sys/devconf.h>
#include <machine/clock.h>
#include <i386/isa/isa.h>
#include <i386/isa/isa_device.h>
#include <i386/isa/icu.h>
#include <pccard/i82365.h>
#include <pccard/card.h>
#include <pccard/driver.h>
#include <pccard/slot.h>
#include <i386/include/laptops.h>
extern struct kern_devconf kdc_pccard0;
struct kern_devconf kdc_pcic[PCIC_MAX_SLOTS] = {
{
0, 0, 0, /* filled in by dev_attach */
"pcic", 0, { MDDT_BUS, 0 },
0, 0, 0, BUS_EXTERNALLEN,
&kdc_pccard0, /* parent is the CPU */
0, /* no parentdata */
DC_UNKNOWN,
"PCMCIA or PCCARD slot",
DC_CLS_BUS /* class */
}
};
/*
* Prototypes for interrupt handler.
*/
static void pcicintr __P((int unit));
static int pcic_ioctl __P((struct slot *, int, caddr_t));
static int pcic_power __P((struct slot *));
static timeout_t pcic_reset;
static void pcic_disable __P((struct slot *));
static void pcic_mapirq __P((struct slot *, int));
static timeout_t pcictimeout;
static int pcic_handle __P((struct lkm_table *lkmtp, int cmd));
static int pcic_memory(struct slot *, int);
static int pcic_io(struct slot *, int);
/*
* Per-slot data table.
*/
static struct pcic_slot {
int slot; /* My slot number */
int index; /* Index register */
int data; /* Data register */
int offset; /* Offset value for index */
char controller; /* Device type */
char revision; /* Device Revision */
struct slot *slotp; /* Back ptr to slot */
} pcic_slots[PCIC_MAX_SLOTS];
static int pcic_irq;
static unsigned pcic_imask;
static struct slot_ctrl cinfo;
/*
* Internal inline functions for accessing the PCIC.
*/
/*
* Read a register from the PCIC.
*/
static inline unsigned char
getb (struct pcic_slot *sp, int reg)
{
outb (sp->index, sp->offset + reg);
return inb (sp->data);
}
/*
* Write a register on the PCIC
*/
static inline void
putb (struct pcic_slot *sp, int reg, unsigned char val)
{
outb (sp->index, sp->offset + reg);
outb (sp->data, val);
}
/*
* Clear bit(s) of a register.
*/
static inline void
clrb(struct pcic_slot *sp, int reg, unsigned char mask)
{
putb (sp, reg, getb (sp, reg) & ~mask);
}
/*
* Set bit(s) of a register
*/
static inline void
setb(struct pcic_slot *sp, int reg, unsigned char mask)
{
putb (sp, reg, getb (sp, reg) | mask);
}
/*
* Write a 16 bit value to 2 adjacent PCIC registers
*/
static inline void
putw (struct pcic_slot *sp, int reg, unsigned short word)
{
putb (sp, reg, word & 0xFF);
putb (sp, reg + 1, (word >> 8) & 0xff);
}
/*
* Loadable kernel module interface.
*/
#ifdef LKM
/*
* This defines the lkm_misc module use by modload
* to define the module name.
*/
MOD_MISC(pcic);
/*
* Module handler that processes loads and unloads.
* Once the module is loaded, the probe routine
* is called to install the slots (if any).
*/
static int
pcic_handle(struct lkm_table *lkmtp, int cmd)
{
int err = 0; /* default = success*/
switch( cmd) {
case LKM_E_LOAD:
/*
* Don't load twice! (lkmexists() is exported by kern_lkm.c)
*/
if( lkmexists( lkmtp))
return( EEXIST);
/*
* Call the probe routine to find the slots. If
* no slots exist, then don't bother loading the module.
*/
if (pcic_probe() == 0)
return(ENODEV);
break; /* Success*/
/*
* Attempt to unload the slot driver.
*/
case LKM_E_UNLOAD:
printf("Unloading PCIC driver\n");
err = pcic_unload(lkmtp, cmd);
break; /* Success*/
default: /* we only understand load/unload*/
err = EINVAL;
break;
}
return( err);
}
/*
* External entry point; should generally match name of .o file. The
* arguments are always the same for all loaded modules. The "load",
* "unload", and "stat" functions in "DISPATCH" will be called under
* their respective circumstances unless their value is "lkm_nullcmd".
* If called, they are called with the same arguments (cmd is included to
* allow the use of a single function, ver is included for version
* matching between modules and the kernel loader for the modules).
*
* Since we expect to link in the kernel and add external symbols to
* the kernel symbol name space in a future version, generally all
* functions used in the implementation of a particular module should
* be static unless they are expected to be seen in other modules or
* to resolve unresolved symbols alread existing in the kernel (the
* second case is not likely to ever occur).
*
* The entry point should return 0 unless it is refusing load (in which
* case it should return an errno from errno.h).
*/
int
pcic_mod(struct lkm_table *lkmtp, int cmd, int ver)
{
DISPATCH(lkmtp,cmd,ver,pcic_handle,pcic_handle,lkm_nullcmd);
}
/*
* pcic_unload - Called when unloading a LKM.
* Disables interrupts and resets PCIC.
*/
static int
pcic_unload(struct lkm_table *lkmtp, int cmd)
{
int slot;
struct pcic_slot *sp = pcic_slots;
untimeout(pcictimeout,0);
if (pcic_irq) {
for (slot = 0; slot < PCIC_MAX_SLOTS; slot++, sp++) {
if (sp->slotp)
putb(sp, PCIC_STAT_INT, 0);
kdc_pcic[slot].kdc_state = DC_UNCONFIGURED;
}
unregister_intr(pcic_irq, pcicintr);
}
pccard_remove_controller(&cinfo);
return(0);
}
#endif /* LKM */
#if 0
static void
pcic_dump_attributes (unsigned char *scratch, int maxlen)
{
int i,j,k;
i = 0;
while (scratch[i] != 0xff && i < maxlen) {
unsigned char link = scratch[i+2];
/*
* Dump attribute memory
*/
if (scratch[i]) {
printf ("[%02x] ", i);
for (j = 0; j < 2 * link + 4 && j < 128; j += 2)
printf ("%02x ", scratch[j + i]);
printf ("\n");
}
i += 4 + 2 * link;
}
}
#endif
/*
* entry point from main code to map/unmap memory context.
*/
static int
pcic_memory(struct slot *slotp, int win)
{
struct pcic_slot *sp = slotp->cdata;
struct mem_desc *mp = &slotp->mem[win];
int reg = mp->window * PCIC_MEMSIZE + PCIC_MEMBASE;
if (mp->flags & MDF_ACTIVE)
{
unsigned long sys_addr = (unsigned long)mp->start >> 12;
/*
* Write the addresses, card offsets and length.
* The values are all stored as the upper 12 bits of the
* 24 bit address i.e everything is allocated as 4 Kb chunks.
*/
putw (sp, reg, sys_addr & 0xFFF);
putw (sp, reg+2, (sys_addr + (mp->size >> 12) - 1) & 0xFFF);
putw (sp, reg+4, ((mp->card >> 12) - sys_addr) & 0x3FFF);
#if 0
printf("card offs = card_adr = 0x%x 0x%x, sys_addr = 0x%x\n",
mp->card, ((mp->card >> 12) - sys_addr) & 0x3FFF,
sys_addr);
#endif
/*
* Each 16 bit register has some flags in the upper bits.
*/
if (mp->flags & MDF_16BITS)
setb(sp, reg+1, PCIC_DATA16);
if (mp->flags & MDF_ZEROWS)
setb(sp, reg+1, PCIC_ZEROWS);
if (mp->flags & MDF_WS0)
setb(sp, reg+3, PCIC_MW0);
if (mp->flags & MDF_WS1)
setb(sp, reg+3, PCIC_MW1);
if (mp->flags & MDF_ATTR)
setb(sp, reg+5, PCIC_REG);
if (mp->flags & MDF_WP)
setb(sp, reg+5, PCIC_WP);
#if 0
printf("Slot number %d, reg 0x%x, offs 0x%x\n",
sp->slot, reg, sp->offset);
printf("Map window to sys addr 0x%x for %d bytes, card 0x%x\n",
mp->start, mp->size, mp->card);
printf("regs are: 0x%02x%02x 0x%02x%02x 0x%02x%02x flags 0x%x\n",
getb(sp, reg), getb(sp, reg+1),
getb(sp, reg+2), getb(sp, reg+3),
getb(sp, reg+4), getb(sp, reg+5),
mp->flags);
#endif
/*
* Enable the memory window. By experiment, we need a delay.
*/
setb (sp, PCIC_ADDRWINE, (1<<win) | PCIC_MEMCS16);
DELAY(50);
}
else
{
#if 0
printf("Unmapping window %d\n", win);
#endif
clrb (sp, PCIC_ADDRWINE, 1<<win);
putw (sp, reg, 0);
putw (sp, reg+2, 0);
putw (sp, reg+4, 0);
}
return(0);
}
/*
* pcic_io - map or unmap I/O context
*/
static int
pcic_io(struct slot *slotp, int win)
{
int mask, reg;
struct pcic_slot *sp = slotp->cdata;
struct io_desc *ip = &slotp->io[win];
switch (win) {
case 0:
mask = PCIC_IO0_EN;
reg = PCIC_IO0;
break;
case 1:
mask = PCIC_IO1_EN;
reg = PCIC_IO1;
break;
default:
panic("Illegal PCIC I/O window request!");
}
if (ip->flags & IODF_ACTIVE) {
unsigned char x, ioctlv;
#ifdef PCIC_DEBUG
printf("Map I/O 0x%x (size 0x%x) on Window %d\n", ip->start, ip->size, win);
#endif /* PCIC_DEBUG */
putw (sp, reg, ip->start);
putw (sp, reg+2, ip->start+ip->size-1);
x = 0;
if (ip->flags & IODF_ZEROWS)
x |= PCIC_IO_0WS;
if (ip->flags & IODF_WS)
x |= PCIC_IO_WS;
if (ip->flags & IODF_CS16)
x |= PCIC_IO_CS16;
if (ip->flags & IODF_16BIT)
x |= PCIC_IO_16BIT;
/*
* Extract the current flags and merge with new flags.
* Flags for window 0 in lower nybble, and in upper nybble
* for window 1.
*/
ioctlv = getb(sp, PCIC_IOCTL);
DELAY(100);
switch (win) {
case 0:
putb(sp, PCIC_IOCTL, x | (ioctlv & 0xf0));
break;
case 1:
putb(sp, PCIC_IOCTL, (x << 4) | (ioctlv & 0xf));
break;
}
DELAY(100);
setb (sp, PCIC_ADDRWINE, mask);
DELAY(100);
} else {
clrb (sp, PCIC_ADDRWINE, mask);
DELAY(100);
putw (sp, reg, 0);
putw (sp, reg + 2, 0);
}
return(0);
}
/*
* Look for an Intel PCIC (or compatible).
* For each available slot, allocate a PC-CARD slot.
*/
/*
* VLSI 82C146 has incompatibilities about the I/O address
* of slot 1. If it's the only PCIC whose vendor ID is 0x84,
* I want to remove this #define and corresponding #ifdef's.
* HOSOKAWA, Tatsumi <hosokawa@mt.cs.keio.ac.jp>
*/
#define VLSI_SLOT1 1
int
pcic_probe ()
{
int slot, i, validslots = 0;
struct slot *slotp;
struct pcic_slot *sp;
unsigned char c;
#ifdef VLSI_SLOT1
static int vs = 0;
#endif /* VLSI_SLOT1 */
/*
* Initialise controller information structure.
*/
cinfo.mapmem = pcic_memory;
cinfo.mapio = pcic_io;
cinfo.ioctl = pcic_ioctl;
cinfo.power = pcic_power;
cinfo.mapirq = pcic_mapirq;
cinfo.reset = pcic_reset;
cinfo.disable = pcic_disable;
cinfo.maxmem = PCIC_MEM_WIN;
cinfo.maxio = PCIC_IO_WIN;
cinfo.irqs = PCIC_INT_MASK_ALLOWED;
#ifdef LKM
bzero(pcic_slots, sizeof(pcic_slots));
#endif
sp = pcic_slots;
for (slot = 0; slot < PCIC_MAX_SLOTS; slot++, sp++) {
/*
* Initialise the PCIC slot table.
*/
if (slot < 4) {
#ifdef VLSI_SLOT1
if (slot == 1 && vs) {
sp->index = PCIC_INDEX_0 + 4;
sp->data = PCIC_DATA_0 + 4;
sp->offset = PCIC_SLOT_SIZE << 1;
} else {
sp->index = PCIC_INDEX_0;
sp->data = PCIC_DATA_0;
sp->offset = slot * PCIC_SLOT_SIZE;
}
#else /* VLSI_SLOT1 */
sp->index = PCIC_INDEX_0;
sp->data = PCIC_DATA_0;
sp->offset = slot * PCIC_SLOT_SIZE;
#endif /* VLSI_SLOT1 */
} else {
sp->index = PCIC_INDEX_1;
sp->data = PCIC_DATA_1;
sp->offset = (slot - 4) * PCIC_SLOT_SIZE;
}
/*
* see if there's a PCMCIA controller here
* Intel PCMCIA controllers use 0x82 and 0x83
* IBM clone chips use 0x88 and 0x89, apparently
*/
c = getb (sp, PCIC_ID_REV);
sp->revision = -1;
switch(c) {
/*
* 82365 or clones.
*/
case 0x82:
case 0x83:
sp->controller = PCIC_I82365;
sp->revision = c & 1;
/*
* Now check for VADEM chips.
*/
outb(sp->index, 0x0E);
outb(sp->index, 0x37);
setb(sp, 0x3A, 0x40);
c = getb (sp, PCIC_ID_REV);
if (c & 0x08) {
sp->controller = ((sp->revision = c & 7) == 4) ?
PCIC_VG469 : PCIC_VG468 ;
clrb(sp, 0x3A, 0x40);
}
/*
* Check for RICOH RF5C396 PCMCIA Controller
*/
c = getb (sp, 0x3a);
if (c == 0xb2) {
sp->controller = PCIC_RF5C396;
}
break;
/*
* VLSI chips.
*/
case 0x84:
sp->controller = PCIC_VLSI;
#ifdef VLSI_SLOT1
vs = 1;
#endif /* VLSI_SLOT1 */
break;
case 0x88:
case 0x89:
sp->controller = PCIC_IBM;
sp->revision = c & 1;
break;
case 0x8a:
sp->controller = PCIC_IBM_KING;
sp->revision = c & 1;
break;
default:
continue;
}
/*
* Check for Cirrus logic chips.
*/
putb(sp, 0x1F, 0);
c = getb(sp, 0x1F);
if ((c & 0xC0) == 0xC0) {
c = getb(sp, 0x1F);
if ((c & 0xC0) == 0) {
if (c & 0x20)
sp->controller = PCIC_PD672X;
else
sp->controller = PCIC_PD6710;
sp->revision = 8 - ((c & 0x1F) >> 2);
}
}
switch(sp->controller) {
case PCIC_I82365:
cinfo.name = "Intel 82365";
break;
case PCIC_IBM:
cinfo.name = "IBM PCIC";
break;
case PCIC_IBM_KING:
cinfo.name = "IBM KING PCMCIA Controller";
break;
case PCIC_PD672X:
cinfo.name = "Cirrus Logic PD672X";
break;
case PCIC_PD6710:
cinfo.name = "Cirrus Logic PD6710";
break;
case PCIC_VG468:
cinfo.name = "Vadem 468";
break;
case PCIC_VG469:
cinfo.name = "Vadem 469";
break;
case PCIC_RF5C396:
cinfo.name = "Ricoh RF5C396";
break;
case PCIC_VLSI:
cinfo.name = "VLSI 82C146";
break;
default:
cinfo.name = "Unknown!";
break;
}
#ifndef PCIC_NOCLRREGS
/*
* clear out the registers.
*/
for (i = 2; i < 0x40; i++)
putb(sp, i, 0);
#endif /* PCIC_NOCLRREGS */
/*
* OK it seems we have a PCIC or lookalike.
* Allocate a slot and initialise the data structures.
*/
validslots++;
sp->slot = slot;
if (kdc_pcic[slot].kdc_state == DC_UNKNOWN) {
if (slot != 0)
kdc_pcic[slot] = kdc_pcic[0];
kdc_pcic[slot].kdc_unit = slot;
kdc_pcic[slot].kdc_state = DC_UNCONFIGURED;
kdc_pcic[slot].kdc_description = cinfo.name;
dev_attach(kdc_pcic+slot);
}
slotp = pccard_alloc_slot(&cinfo);
if (slotp == 0)
continue;
kdc_pcic[slot].kdc_state = DC_IDLE;
slotp->cdata = sp;
sp->slotp = slotp;
/*
* If we haven't allocated an interrupt for the controller,
* then attempt to get one.
*/
if (pcic_irq == 0) {
pcic_irq = pccard_alloc_intr(PCIC_INT_MASK_ALLOWED,
pcicintr, 0, &pcic_imask);
if (pcic_irq < 0)
printf("pcic: failed to allocate IRQ\n");
}
/*
* Check for a card in this slot.
*/
setb (sp, PCIC_POWER, PCIC_PCPWRE| PCIC_DISRST);
if ((getb (sp, PCIC_STATUS) & PCIC_CD) != PCIC_CD) {
slotp->laststate = slotp->state = empty;
} else {
slotp->laststate = slotp->state = filled;
pccard_event(sp->slotp, card_inserted);
}
/*
* Assign IRQ for slot changes
*/
if (pcic_irq > 0)
putb(sp, PCIC_STAT_INT, (pcic_irq << 4) | 0xF);
}
if (validslots)
timeout(pcictimeout,0,hz/2);
return(validslots);
}
/*
* ioctl calls - Controller specific ioctls
*/
static int
pcic_ioctl(struct slot *slotp, int cmd, caddr_t data)
{
switch(cmd) {
default:
return(EINVAL);
/*
* Get/set PCIC registers
*/
case PIOCGREG:
((struct pcic_reg *)data)->value =
getb(slotp->cdata, ((struct pcic_reg *)data)->reg);
break;
case PIOCSREG:
putb(slotp->cdata, ((struct pcic_reg *)data)->reg,
((struct pcic_reg *)data)->value);
break;
}
return(0);
}
/*
* pcic_power - Enable the power of the slot according to
* the parameters in the power structure(s).
*/
static int
pcic_power(struct slot *slotp)
{
unsigned char reg = PCIC_DISRST|PCIC_PCPWRE;
struct pcic_slot *sp = slotp->cdata;
switch(sp->controller) {
case PCIC_PD672X:
case PCIC_PD6710:
case PCIC_VG468:
case PCIC_VG469:
case PCIC_RF5C396:
case PCIC_VLSI:
case PCIC_IBM_KING:
switch(slotp->pwr.vpp) {
default:
return(EINVAL);
case 0:
break;
case 50:
case 33:
reg |= PCIC_VPP_5V;
break;
case 120:
reg |= PCIC_VPP_12V;
break;
}
switch(slotp->pwr.vcc) {
default:
return(EINVAL);
case 0:
break;
case 33:
if (sp->controller == PCIC_IBM_KING) {
reg |= PCIC_VCC_5V_KING;
break;
}
reg |= PCIC_VCC_5V;
if ((sp->controller == PCIC_VG468)||
(sp->controller == PCIC_VG469))
setb(sp, 0x2f, 0x03) ;
else
setb(sp, 0x16, 0x02);
break;
case 50:
if (sp->controller == PCIC_IBM_KING) {
reg |= PCIC_VCC_5V_KING;
break;
}
reg |= PCIC_VCC_5V;
if ((sp->controller == PCIC_VG468)||
(sp->controller == PCIC_VG469))
clrb(sp, 0x2f, 0x03) ;
else
clrb(sp, 0x16, 0x02);
break;
}
break;
}
putb (sp, PCIC_POWER, reg);
DELAY(300*1000);
if (slotp->pwr.vcc) {
reg |= PCIC_OUTENA;
putb (sp, PCIC_POWER, reg);
DELAY (100*1000);
}
return(0);
}
/*
* tell the PCIC which irq we want to use. only the following are legal:
* 3, 4, 5, 7, 9, 10, 11, 12, 14, 15
*/
static void
pcic_mapirq (struct slot *slotp, int irq)
{
struct pcic_slot *sp = slotp->cdata;
if (irq == 0)
clrb(sp, PCIC_INT_GEN, 0xF);
else
putb (sp, PCIC_INT_GEN, (getb (sp, PCIC_INT_GEN) & 0xF0) | irq);
}
/*
* pcic_reset - Reset the card and enable initial power.
*/
static void
pcic_reset(void *chan)
{
struct slot *slotp = chan;
struct pcic_slot *sp = slotp->cdata;
switch (slotp->insert_seq) {
case 0: /* Something funny happended on the way to the pub... */
return;
case 1: /* Assert reset */
clrb (sp, PCIC_INT_GEN, PCIC_CARDRESET);
slotp->insert_seq = 2;
timeout(pcic_reset, (void*) slotp, hz/4);
return;
case 2: /* Deassert it again */
setb (sp, PCIC_INT_GEN, PCIC_CARDRESET|PCIC_IOCARD);
slotp->insert_seq = 3;
timeout(pcic_reset, (void*) slotp, hz/4);
return;
case 3: /* Wait if card needs more time */
if (!getb(sp, PCIC_STATUS) & PCIC_READY) {
timeout(pcic_reset, (void*) slotp, hz/10);
return;
}
}
slotp->insert_seq = 0;
if (sp->controller == PCIC_PD672X || sp->controller == PCIC_PD6710) {
putb(sp, PCIC_TIME_SETUP0, 0x1);
putb(sp, PCIC_TIME_CMD0, 0x6);
putb(sp, PCIC_TIME_RECOV0, 0x0);
putb(sp, PCIC_TIME_SETUP1, 1);
putb(sp, PCIC_TIME_CMD1, 0x5F);
putb(sp, PCIC_TIME_RECOV1, 0);
}
selwakeup(&slotp->selp);
}
/*
* pcic_disable - Disable the slot.
*/
static void
pcic_disable(struct slot *slotp)
{
struct pcic_slot *sp = slotp->cdata;
putb(sp, PCIC_INT_GEN, 0);
putb(sp, PCIC_POWER, 0);
}
/*
* PCIC timer, it seems that we loose interrupts sometimes
* so poll just in case...
*/
static void
pcictimeout(void *chan)
{
timeout(pcictimeout,0,hz/2);
pcicintr(0);
}
/*
* PCIC Interrupt handler.
* Check each slot in turn, and read the card status change
* register. If this is non-zero, then a change has occurred
* on this card, so send an event to the main code.
*/
static void
pcicintr(int unit)
{
int slot, s;
unsigned char chg;
struct pcic_slot *sp = pcic_slots;
s = splhigh();
for (slot = 0; slot < PCIC_MAX_SLOTS; slot++, sp++)
if (sp->slotp && (chg = getb(sp, PCIC_STAT_CHG)) != 0)
if (chg & PCIC_CDTCH) {
if ((getb(sp, PCIC_STATUS) & PCIC_CD) ==
PCIC_CD) {
kdc_pcic[slot].kdc_state = DC_BUSY;;
pccard_event(sp->slotp,
card_inserted);
} else {
pccard_event(sp->slotp,
card_removed);
kdc_pcic[slot].kdc_state = DC_IDLE;;
}
}
splx(s);
}
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