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/*
* linux/arch/i386/kernel/mca.c
* Written by Martin Kolinek, February 1996
*
* Changes:
*
* Chris Beauregard July 28th, 1996
* - Fixed up integrated SCSI detection
*
* Chris Beauregard August 3rd, 1996
* - Made mca_info local
* - Made integrated registers accessible through standard function calls
* - Added name field
* - More sanity checking
*
* Chris Beauregard August 9th, 1996
* - Rewrote /proc/mca
*
* Chris Beauregard January 7th, 1997
* - Added basic NMI-processing
* - Added more information to mca_info structure
*
* David Weinehall October 12th, 1998
* - Made a lot of cleaning up in the source
* - Added use of save_flags / restore_flags
* - Added the 'driver_loaded' flag in MCA_adapter
* - Added an alternative implemention of ZP Gu's mca_find_unused_adapter
*
* David Weinehall March 24th, 1999
* - Fixed the output of 'Driver Installed' in /proc/mca/pos
* - Made the Integrated Video & SCSI show up even if they have id 0000
*
* Alexander Viro November 9th, 1999
* - Switched to regular procfs methods
*
* Alfred Arnold & David Weinehall August 23rd, 2000
* - Added support for Planar POS-registers
*/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/mca.h>
#include <asm/system.h>
#include <asm/io.h>
#include <linux/proc_fs.h>
#include <linux/mman.h>
#include <linux/config.h>
#include <linux/mm.h>
#include <linux/pagemap.h>
#include <linux/ioport.h>
#include <asm/uaccess.h>
#include <linux/init.h>
/* This structure holds MCA information. Each (plug-in) adapter has
* eight POS registers. Then the machine may have integrated video and
* SCSI subsystems, which also have eight POS registers.
* Finally, the motherboard (planar) has got POS-registers.
* Other miscellaneous information follows.
*/
typedef enum {
MCA_ADAPTER_NORMAL = 0,
MCA_ADAPTER_NONE = 1,
MCA_ADAPTER_DISABLED = 2,
MCA_ADAPTER_ERROR = 3
} MCA_AdapterStatus;
struct MCA_adapter {
MCA_AdapterStatus status; /* is there a valid adapter? */
int id; /* adapter id value */
unsigned char pos[8]; /* POS registers */
int driver_loaded; /* is there a driver installed? */
/* 0 - No, 1 - Yes */
char name[48]; /* adapter-name provided by driver */
char procname[8]; /* name of /proc/mca file */
MCA_ProcFn procfn; /* /proc info callback */
void* dev; /* device/context info for callback */
};
struct MCA_info {
/* one for each of the 8 possible slots, plus one for integrated SCSI
* and one for integrated video.
*/
struct MCA_adapter slot[MCA_NUMADAPTERS];
/* two potential addresses for integrated SCSI adapter - this will
* track which one we think it is.
*/
unsigned char which_scsi;
};
/* The mca_info structure pointer. If MCA bus is present, the function
* mca_probe() is invoked. The function puts motherboard, then all
* adapters into setup mode, allocates and fills an MCA_info structure,
* and points this pointer to the structure. Otherwise the pointer
* is set to zero.
*/
static struct MCA_info* mca_info = NULL;
/* MCA registers */
#define MCA_MOTHERBOARD_SETUP_REG 0x94
#define MCA_ADAPTER_SETUP_REG 0x96
#define MCA_POS_REG(n) (0x100+(n))
#define MCA_ENABLED 0x01 /* POS 2, set if adapter enabled */
/*--------------------------------------------------------------------*/
#ifdef CONFIG_PROC_FS
static void mca_do_proc_init(void);
#endif
/*--------------------------------------------------------------------*/
/* Build the status info for the adapter */
static void mca_configure_adapter_status(int slot) {
mca_info->slot[slot].status = MCA_ADAPTER_NONE;
mca_info->slot[slot].id = mca_info->slot[slot].pos[0]
+ (mca_info->slot[slot].pos[1] << 8);
if(!mca_info->slot[slot].id && slot < MCA_MAX_SLOT_NR) {
/* id = 0x0000 usually indicates hardware failure,
* however, ZP Gu (zpg@castle.net> reports that his 9556
* has 0x0000 as id and everything still works. There
* also seem to be an adapter with id = 0x0000; the
* NCR Parallel Bus Memory Card. Until this is confirmed,
* however, this code will stay.
*/
mca_info->slot[slot].status = MCA_ADAPTER_ERROR;
return;
} else if(mca_info->slot[slot].id != 0xffff) {
/* 0xffff usually indicates that there's no adapter,
* however, some integrated adapters may have 0xffff as
* their id and still be valid. Examples are on-board
* VGA of the 55sx, the integrated SCSI of the 56 & 57,
* and possibly also the 95 ULTIMEDIA.
*/
mca_info->slot[slot].status = MCA_ADAPTER_NORMAL;
}
if((mca_info->slot[slot].id == 0xffff ||
mca_info->slot[slot].id == 0x0000) && slot >= MCA_MAX_SLOT_NR) {
int j;
for(j = 2; j < 8; j++) {
if(mca_info->slot[slot].pos[j] != 0xff) {
mca_info->slot[slot].status = MCA_ADAPTER_NORMAL;
break;
}
}
}
if(!(mca_info->slot[slot].pos[2] & MCA_ENABLED)) {
/* enabled bit is in POS 2 */
mca_info->slot[slot].status = MCA_ADAPTER_DISABLED;
}
} /* mca_configure_adapter_status */
/*--------------------------------------------------------------------*/
struct resource mca_standard_resources[] = {
{ "system control port B (MCA)", 0x60, 0x60 },
{ "arbitration (MCA)", 0x90, 0x90 },
{ "card Select Feedback (MCA)", 0x91, 0x91 },
{ "system Control port A (MCA)", 0x92, 0x92 },
{ "system board setup (MCA)", 0x94, 0x94 },
{ "POS (MCA)", 0x96, 0x97 },
{ "POS (MCA)", 0x100, 0x107 }
};
#define MCA_STANDARD_RESOURCES (sizeof(mca_standard_resources)/sizeof(struct resource))
void __init 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");
/* Allocate MCA_info structure (at address divisible by 8) */
mca_info = (struct MCA_info *)kmalloc(sizeof(struct MCA_info), GFP_KERNEL);
if(mca_info == NULL) {
printk("Failed to allocate memory for mca_info!");
return;
}
memset(mca_info, 0, sizeof(struct MCA_info));
save_flags(flags);
cli();
/* Make sure adapter setup is off */
outb_p(0, MCA_ADAPTER_SETUP_REG);
/* Read motherboard POS registers */
outb_p(0x7f, MCA_MOTHERBOARD_SETUP_REG);
mca_info->slot[MCA_MOTHERBOARD].name[0] = 0;
for(j=0; j<8; j++) {
mca_info->slot[MCA_MOTHERBOARD].pos[j] = inb_p(MCA_POS_REG(j));
}
mca_configure_adapter_status(MCA_MOTHERBOARD);
/* 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 (apena@vnet.ibm.com) 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);
for (i = 0; i < MCA_STANDARD_RESOURCES; i++)
request_resource(&ioport_resource, mca_standard_resources + i);
#ifdef CONFIG_PROC_FS
mca_do_proc_init();
#endif
}
/*--------------------------------------------------------------------*/
static void mca_handle_nmi_slot(int slot, int check_flag)
{
if(slot < MCA_MAX_SLOT_NR) {
printk("NMI: caused by MCA adapter in slot %d (%s)\n", slot+1,
mca_info->slot[slot].name);
} else if(slot == MCA_INTEGSCSI) {
printk("NMI: caused by MCA integrated SCSI adapter (%s)\n",
mca_info->slot[slot].name);
} else if(slot == MCA_INTEGVIDEO) {
printk("NMI: caused by MCA integrated video adapter (%s)\n",
mca_info->slot[slot].name);
} else if(slot == MCA_MOTHERBOARD) {
printk("NMI: caused by motherboard (%s)\n",
mca_info->slot[slot].name);
}
/* More info available in POS 6 and 7? */
if(check_flag) {
unsigned char pos6, pos7;
pos6 = mca_read_pos(slot, 6);
pos7 = mca_read_pos(slot, 7);
printk("NMI: POS 6 = 0x%x, POS 7 = 0x%x\n", pos6, pos7);
}
} /* mca_handle_nmi_slot */
/*--------------------------------------------------------------------*/
void mca_handle_nmi(void)
{
int i;
unsigned char pos5;
/* First try - scan the various adapters and see if a specific
* adapter was responsible for the error.
*/
for(i = 0; i < MCA_NUMADAPTERS; i++) {
/* Bit 7 of POS 5 is reset when this adapter has a hardware
* error. Bit 7 it reset if there's error information
* available in POS 6 and 7.
*/
pos5 = mca_read_pos(i, 5);
if(!(pos5 & 0x80)) {
mca_handle_nmi_slot(i, !(pos5 & 0x40));
return;
}
}
/* If I recall correctly, there's a whole bunch of other things that
* we can do to check for NMI problems, but that's all I know about
* at the moment.
*/
printk("NMI generated from unknown source!\n");
} /* mca_handle_nmi */
/*--------------------------------------------------------------------*/
/**
* mca_find_adapter - scan for adapters
* @id: MCA identification to search for
* @start: starting slot
*
* Search the MCA configuration for adapters matching the 16bit
* ID given. The first time it should be called with start as zero
* and then further calls made passing the return value of the
* previous call until %MCA_NOTFOUND is returned.
*
* Disabled adapters are not reported.
*/
int mca_find_adapter(int id, int start)
{
if(mca_info == NULL || id == 0xffff) {
return MCA_NOTFOUND;
}
for(; start >= 0 && start < MCA_NUMADAPTERS; start++) {
/* Not sure about this. There's no point in returning
* adapters that aren't enabled, since they can't actually
* be used. However, they might be needed for statistical
* purposes or something... But if that is the case, the
* user is free to write a routine that manually iterates
* through the adapters.
*/
if(mca_info->slot[start].status == MCA_ADAPTER_DISABLED) {
continue;
}
if(id == mca_info->slot[start].id) {
return start;
}
}
return MCA_NOTFOUND;
} /* mca_find_adapter() */
EXPORT_SYMBOL(mca_find_adapter);
/*--------------------------------------------------------------------*/
/**
* mca_find_unused_adapter - scan for unused adapters
* @id: MCA identification to search for
* @start: starting slot
*
* Search the MCA configuration for adapters matching the 16bit
* ID given. The first time it should be called with start as zero
* and then further calls made passing the return value of the
* previous call until %MCA_NOTFOUND is returned.
*
* Adapters that have been claimed by drivers and those that
* are disabled are not reported. This function thus allows a driver
* to scan for further cards when some may already be driven.
*/
int mca_find_unused_adapter(int id, int start)
{
if(mca_info == NULL || id == 0xffff) {
return MCA_NOTFOUND;
}
for(; start >= 0 && start < MCA_NUMADAPTERS; start++) {
/* not sure about this. There's no point in returning
* adapters that aren't enabled, since they can't actually
* be used. However, they might be needed for statistical
* purposes or something... But if that is the case, the
* user is free to write a routine that manually iterates
* through the adapters.
*/
if(mca_info->slot[start].status == MCA_ADAPTER_DISABLED ||
mca_info->slot[start].driver_loaded) {
continue;
}
if(id == mca_info->slot[start].id) {
return start;
}
}
return MCA_NOTFOUND;
} /* mca_find_unused_adapter() */
EXPORT_SYMBOL(mca_find_unused_adapter);
/*--------------------------------------------------------------------*/
/**
* mca_read_stored_pos - read POS register from boot data
* @slot: slot number to read from
* @reg: register to read from
*
* Fetch a POS value that was stored at boot time by the kernel
* when it scanned the MCA space. The register value is returned.
* Missing or invalid registers report 0.
*/
unsigned char mca_read_stored_pos(int slot, int reg)
{
if(slot < 0 || slot >= MCA_NUMADAPTERS || mca_info == NULL) return 0;
if(reg < 0 || reg >= 8) return 0;
return mca_info->slot[slot].pos[reg];
} /* mca_read_stored_pos() */
EXPORT_SYMBOL(mca_read_stored_pos);
/*--------------------------------------------------------------------*/
/**
* mca_read_pos - read POS register from card
* @slot: slot number to read from
* @reg: register to read from
*
* Fetch a POS value directly from the hardware to obtain the
* current value. This is much slower than mca_read_stored_pos and
* may not be invoked from interrupt context. It handles the
* deep magic required for onboard devices transparently.
*/
unsigned char mca_read_pos(int slot, int reg)
{
unsigned int byte = 0;
unsigned long flags;
if(slot < 0 || slot >= MCA_NUMADAPTERS || mca_info == NULL) 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_MOTHERBOARD) {
/* Disable adapter setup, enable motherboard setup */
outb_p(0, MCA_ADAPTER_SETUP_REG);
outb_p(0x7f, 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() */
EXPORT_SYMBOL(mca_read_pos);
/*--------------------------------------------------------------------*/
/**
* mca_write_pos - read POS register from card
* @slot: slot number to read from
* @reg: register to read from
* @byte: byte to write to the POS registers
*
* Store a POS value directly from the hardware. You should not
* normally need to use this function and should have a very good
* knowledge of MCA bus before you do so. Doing this wrongly can
* damage the hardware.
*
* This function may not be used from interrupt context.
*
* Note that this a technically a Bad Thing, as IBM tech stuff says
* you should only set POS values through their utilities.
* However, some devices such as the 3c523 recommend that you write
* back some data to make sure the configuration is consistent.
* I'd say that IBM is right, but I like my drivers to work.
*
* This function can't do checks to see if multiple devices end up
* with the same resources, so you might see magic smoke if someone
* screws up.
*/
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 == NULL)
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() */
EXPORT_SYMBOL(mca_write_pos);
/*--------------------------------------------------------------------*/
/**
* mca_set_adapter_name - Set the description of the card
* @slot: slot to name
* @name: text string for the namen
*
* This function sets the name reported via /proc for this
* adapter slot. This is for user information only. Setting a
* name deletes any previous name.
*/
void mca_set_adapter_name(int slot, char* name)
{
if(mca_info == NULL) return;
if(slot >= 0 && slot < MCA_NUMADAPTERS) {
if(name != NULL) {
strncpy(mca_info->slot[slot].name, name,
sizeof(mca_info->slot[slot].name)-1);
mca_info->slot[slot].name[
sizeof(mca_info->slot[slot].name)-1] = 0;
} else {
mca_info->slot[slot].name[0] = 0;
}
}
}
EXPORT_SYMBOL(mca_set_adapter_name);
/**
* mca_set_adapter_procfn - Set the /proc callback
* @slot: slot to configure
* @procfn: callback function to call for /proc
* @dev: device information passed to the callback
*
* This sets up an information callback for /proc/mca/slot?. The
* function is called with the buffer, slot, and device pointer (or
* some equally informative context information, or nothing, if you
* prefer), and is expected to put useful information into the
* buffer. The adapter name, ID, and POS registers get printed
* before this is called though, so don't do it again.
*
* This should be called with a %NULL @procfn when a module
* unregisters, thus preventing kernel crashes and other such
* nastiness.
*/
void mca_set_adapter_procfn(int slot, MCA_ProcFn procfn, void* dev)
{
if(mca_info == NULL) return;
if(slot >= 0 && slot < MCA_NUMADAPTERS) {
mca_info->slot[slot].procfn = procfn;
mca_info->slot[slot].dev = dev;
}
}
EXPORT_SYMBOL(mca_set_adapter_procfn);
/**
* mca_is_adapter_used - check if claimed by driver
* @slot: slot to check
*
* Returns 1 if the slot has been claimed by a driver
*/
int mca_is_adapter_used(int slot)
{
return mca_info->slot[slot].driver_loaded;
}
EXPORT_SYMBOL(mca_is_adapter_used);
/**
* mca_mark_as_used - claim an MCA device
* @slot: slot to claim
* FIXME: should we make this threadsafe
*
* Claim an MCA slot for a device driver. If the
* slot is already taken the function returns 1,
* if it is not taken it is claimed and 0 is
* returned.
*/
int mca_mark_as_used(int slot)
{
if(mca_info->slot[slot].driver_loaded) return 1;
mca_info->slot[slot].driver_loaded = 1;
return 0;
}
EXPORT_SYMBOL(mca_mark_as_used);
/**
* mca_mark_as_unused - release an MCA device
* @slot: slot to claim
*
* Release the slot for other drives to use.
*/
void mca_mark_as_unused(int slot)
{
mca_info->slot[slot].driver_loaded = 0;
}
EXPORT_SYMBOL(mca_mark_as_unused);
/**
* mca_get_adapter_name - get the adapter description
* @slot: slot to query
*
* Return the adapter description if set. If it has not been
* set or the slot is out range then return NULL.
*/
char *mca_get_adapter_name(int slot)
{
if(mca_info == NULL) return 0;
if(slot >= 0 && slot < MCA_NUMADAPTERS) {
return mca_info->slot[slot].name;
}
return 0;
}
EXPORT_SYMBOL(mca_get_adapter_name);
/**
* mca_isadapter - check if the slot holds an adapter
* @slot: slot to query
*
* Returns zero if the slot does not hold an adapter, non zero if
* it does.
*/
int mca_isadapter(int slot)
{
if(mca_info == NULL) return 0;
if(slot >= 0 && slot < MCA_NUMADAPTERS) {
return ((mca_info->slot[slot].status == MCA_ADAPTER_NORMAL)
|| (mca_info->slot[slot].status == MCA_ADAPTER_DISABLED));
}
return 0;
}
EXPORT_SYMBOL(mca_isadapter);
/**
* mca_isadapter - check if the slot holds an adapter
* @slot: slot to query
*
* Returns a non zero value if the slot holds an enabled adapter
* and zero for any other case.
*/
int mca_isenabled(int slot)
{
if(mca_info == NULL) return 0;
if(slot >= 0 && slot < MCA_NUMADAPTERS) {
return (mca_info->slot[slot].status == MCA_ADAPTER_NORMAL);
}
return 0;
}
EXPORT_SYMBOL(mca_isenabled);
/*--------------------------------------------------------------------*/
#ifdef CONFIG_PROC_FS
int get_mca_info(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
int i, j, len = 0;
if(MCA_bus && mca_info != NULL) {
/* Format POS registers of eight MCA slots */
for(i=0; i<MCA_MAX_SLOT_NR; i++) {
len += sprintf(page+len, "Slot %d: ", i+1);
for(j=0; j<8; j++)
len += sprintf(page+len, "%02x ", mca_info->slot[i].pos[j]);
len += sprintf(page+len, " %s\n", mca_info->slot[i].name);
}
/* Format POS registers of integrated video subsystem */
len += sprintf(page+len, "Video : ");
for(j=0; j<8; j++)
len += sprintf(page+len, "%02x ", mca_info->slot[MCA_INTEGVIDEO].pos[j]);
len += sprintf(page+len, " %s\n", mca_info->slot[MCA_INTEGVIDEO].name);
/* Format POS registers of integrated SCSI subsystem */
len += sprintf(page+len, "SCSI : ");
for(j=0; j<8; j++)
len += sprintf(page+len, "%02x ", mca_info->slot[MCA_INTEGSCSI].pos[j]);
len += sprintf(page+len, " %s\n", mca_info->slot[MCA_INTEGSCSI].name);
/* Format POS registers of motherboard */
len += sprintf(page+len, "Planar: ");
for(j=0; j<8; j++)
len += sprintf(page+len, "%02x ", mca_info->slot[MCA_MOTHERBOARD].pos[j]);
len += sprintf(page+len, " %s\n", mca_info->slot[MCA_MOTHERBOARD].name);
} else {
/* Leave it empty if MCA not detected - this should *never*
* happen!
*/
}
if (len <= off+count) *eof = 1;
*start = page + off;
len -= off;
if (len>count) len = count;
if (len<0) len = 0;
return len;
}
/*--------------------------------------------------------------------*/
static int mca_default_procfn(char* buf, struct MCA_adapter *p)
{
int len = 0, i;
int slot = p - mca_info->slot;
/* Print out the basic information */
if(slot < MCA_MAX_SLOT_NR) {
len += sprintf(buf+len, "Slot: %d\n", slot+1);
} else if(slot == MCA_INTEGSCSI) {
len += sprintf(buf+len, "Integrated SCSI Adapter\n");
} else if(slot == MCA_INTEGVIDEO) {
len += sprintf(buf+len, "Integrated Video Adapter\n");
} else if(slot == MCA_MOTHERBOARD) {
len += sprintf(buf+len, "Motherboard\n");
}
if(p->name[0]) {
/* Drivers might register a name without /proc handler... */
len += sprintf(buf+len, "Adapter Name: %s\n",
p->name);
} else {
len += sprintf(buf+len, "Adapter Name: Unknown\n");
}
len += sprintf(buf+len, "Id: %02x%02x\n",
p->pos[1], p->pos[0]);
len += sprintf(buf+len, "Enabled: %s\nPOS: ",
mca_isenabled(slot) ? "Yes" : "No");
for(i=0; i<8; i++) {
len += sprintf(buf+len, "%02x ", p->pos[i]);
}
len += sprintf(buf+len, "\nDriver Installed: %s",
mca_is_adapter_used(slot) ? "Yes" : "No");
buf[len++] = '\n';
buf[len] = 0;
return len;
} /* mca_default_procfn() */
static int get_mca_machine_info(char* page, char **start, off_t off,
int count, int *eof, void *data)
{
int len = 0;
len += sprintf(page+len, "Model Id: 0x%x\n", machine_id);
len += sprintf(page+len, "Submodel Id: 0x%x\n", machine_submodel_id);
len += sprintf(page+len, "BIOS Revision: 0x%x\n", BIOS_revision);
if (len <= off+count) *eof = 1;
*start = page + off;
len -= off;
if (len>count) len = count;
if (len<0) len = 0;
return len;
}
static int mca_read_proc(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
struct MCA_adapter *p = (struct MCA_adapter *)data;
int len = 0;
/* Get the standard info */
len = mca_default_procfn(page, p);
/* Do any device-specific processing, if there is any */
if(p->procfn) {
len += p->procfn(page+len, p-mca_info->slot, p->dev);
}
if (len <= off+count) *eof = 1;
*start = page + off;
len -= off;
if (len>count) len = count;
if (len<0) len = 0;
return len;
} /* mca_read_proc() */
/*--------------------------------------------------------------------*/
void __init mca_do_proc_init(void)
{
int i;
struct proc_dir_entry *proc_mca;
struct proc_dir_entry* node = NULL;
struct MCA_adapter *p;
if(mca_info == NULL) return; /* Should never happen */
proc_mca = proc_mkdir("mca", &proc_root);
create_proc_read_entry("pos",0,proc_mca,get_mca_info,NULL);
create_proc_read_entry("machine",0,proc_mca,get_mca_machine_info,NULL);
/* Initialize /proc/mca entries for existing adapters */
for(i = 0; i < MCA_NUMADAPTERS; i++) {
p = &mca_info->slot[i];
p->procfn = 0;
if(i < MCA_MAX_SLOT_NR) sprintf(p->procname,"slot%d", i+1);
else if(i == MCA_INTEGVIDEO) sprintf(p->procname,"video");
else if(i == MCA_INTEGSCSI) sprintf(p->procname,"scsi");
else if(i == MCA_MOTHERBOARD) sprintf(p->procname,"planar");
if(!mca_isadapter(i)) continue;
node = create_proc_read_entry(p->procname, 0, proc_mca,
mca_read_proc, (void *)p);
if(node == NULL) {
printk("Failed to allocate memory for MCA proc-entries!");
return;
}
}
} /* mca_do_proc_init() */
#endif
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