mca.c
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上传日期:2013-04-10
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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%xn", 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, " %sn", 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, " %sn", 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, " %sn", 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, " %sn", 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: %dn", slot+1);
- } else if(slot == MCA_INTEGSCSI) {
- len += sprintf(buf+len, "Integrated SCSI Adaptern");
- } else if(slot == MCA_INTEGVIDEO) {
- len += sprintf(buf+len, "Integrated Video Adaptern");
- } else if(slot == MCA_MOTHERBOARD) {
- len += sprintf(buf+len, "Motherboardn");
- }
- if(p->name[0]) {
- /* Drivers might register a name without /proc handler... */
- len += sprintf(buf+len, "Adapter Name: %sn",
- p->name);
- } else {
- len += sprintf(buf+len, "Adapter Name: Unknownn");
- }
- len += sprintf(buf+len, "Id: %02x%02xn",
- p->pos[1], p->pos[0]);
- len += sprintf(buf+len, "Enabled: %snPOS: ",
- 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%xn", machine_id);
- len += sprintf(page+len, "Submodel Id: 0x%xn", machine_submodel_id);
- len += sprintf(page+len, "BIOS Revision: 0x%xn", 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