Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1092 insertions, 0 deletions

diff --git a/drivers/block/ps2esdi.c b/drivers/block/ps2esdi.c
new file mode 100644
index 000000000000..29548784cb7b
--- /dev/null
+++ b/drivers/block/ps2esdi.c
@@ -0,0 +1,1092 @@
+/* ps2esdi driver based on assembler code by Arindam Banerji,
+   written by Peter De Schrijver */
+/* Reassuring note to IBM : This driver was NOT developed by vice-versa
+   engineering the PS/2's BIOS */
+/* Dedicated to Wannes, Tofke, Ykke, Godot, Killroy and all those 
+   other lovely fish out there... */
+/* This code was written during the long and boring WINA 
+   elections 1994 */
+/* Thanks to Arindam Banerij for giving me the source of his driver */
+/* This code may be freely distributed and modified in any way, 
+   as long as these notes remain intact */
+
+/*  Revised: 05/07/94 by Arindam Banerji (axb@cse.nd.edu) */
+/*  Revised: 09/08/94 by Peter De Schrijver (stud11@cc4.kuleuven.ac.be)
+   Thanks to Arindam Banerij for sending me the docs of the adapter */
+
+/* BA Modified for ThinkPad 720 by Boris Ashkinazi */
+/*                    (bash@vnet.ibm.com) 08/08/95 */
+
+/* Modified further for ThinkPad-720C by Uri Blumenthal */
+/*                    (uri@watson.ibm.com) Sep 11, 1995 */
+
+/* TODO : 
+   + Timeouts
+   + Get disk parameters
+   + DMA above 16MB
+   + reset after read/write error
+ */
+
+#define DEVICE_NAME "PS/2 ESDI"
+
+#include <linux/config.h>
+#include <linux/major.h>
+#include <linux/errno.h>
+#include <linux/wait.h>
+#include <linux/interrupt.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/genhd.h>
+#include <linux/ps2esdi.h>
+#include <linux/blkdev.h>
+#include <linux/mca-legacy.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/module.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/mca_dma.h>
+#include <asm/uaccess.h>
+
+#define PS2ESDI_IRQ 14
+#define MAX_HD 2
+#define MAX_RETRIES 5
+#define MAX_16BIT 65536
+#define ESDI_TIMEOUT   0xf000
+#define ESDI_STAT_TIMEOUT 4
+
+#define TYPE_0_CMD_BLK_LENGTH 2
+#define TYPE_1_CMD_BLK_LENGTH 4
+
+static void reset_ctrl(void);
+
+static int ps2esdi_geninit(void);
+
+static void do_ps2esdi_request(request_queue_t * q);
+
+static void ps2esdi_readwrite(int cmd, struct request *req);
+
+static void ps2esdi_fill_cmd_block(u_short * cmd_blk, u_short cmd,
+u_short cyl, u_short head, u_short sector, u_short length, u_char drive);
+
+static int ps2esdi_out_cmd_blk(u_short * cmd_blk);
+
+static void ps2esdi_prep_dma(char *buffer, u_short length, u_char dma_xmode);
+
+static irqreturn_t ps2esdi_interrupt_handler(int irq, void *dev_id,
+                                      struct pt_regs *regs);
+static void (*current_int_handler) (u_int) = NULL;
+static void ps2esdi_normal_interrupt_handler(u_int);
+static void ps2esdi_initial_reset_int_handler(u_int);
+static void ps2esdi_geometry_int_handler(u_int);
+static int ps2esdi_ioctl(struct inode *inode, struct file *file,
+                         u_int cmd, u_long arg);
+
+static int ps2esdi_read_status_words(int num_words, int max_words, u_short * buffer);
+
+static void dump_cmd_complete_status(u_int int_ret_code);
+
+static void ps2esdi_get_device_cfg(void);
+
+static void ps2esdi_reset_timer(unsigned long unused);
+
+static u_int dma_arb_level;             /* DMA arbitration level */
+
+static DECLARE_WAIT_QUEUE_HEAD(ps2esdi_int);
+
+static int no_int_yet;
+static int ps2esdi_drives;
+static u_short io_base;
+static struct timer_list esdi_timer =
+                TIMER_INITIALIZER(ps2esdi_reset_timer, 0, 0);
+static int reset_status;
+static int ps2esdi_slot = -1;
+static int tp720esdi = 0;       /* Is it Integrated ESDI of ThinkPad-720? */
+static int intg_esdi = 0;       /* If integrated adapter */
+struct ps2esdi_i_struct {
+        unsigned int head, sect, cyl, wpcom, lzone, ctl;
+};
+static DEFINE_SPINLOCK(ps2esdi_lock);
+static struct request_queue *ps2esdi_queue;
+static struct request *current_req;
+
+#if 0
+#if 0                           /* try both - I don't know which one is better... UB */
+static struct ps2esdi_i_struct ps2esdi_info[MAX_HD] =
+{
+        {4, 48, 1553, 0, 0, 0},
+        {0, 0, 0, 0, 0, 0}};
+#else
+static struct ps2esdi_i_struct ps2esdi_info[MAX_HD] =
+{
+        {64, 32, 161, 0, 0, 0},
+        {0, 0, 0, 0, 0, 0}};
+#endif
+#endif
+static struct ps2esdi_i_struct ps2esdi_info[MAX_HD] =
+{
+        {0, 0, 0, 0, 0, 0},
+        {0, 0, 0, 0, 0, 0}};
+
+static struct block_device_operations ps2esdi_fops =
+{
+        .owner          = THIS_MODULE,
+        .ioctl          = ps2esdi_ioctl,
+};
+
+static struct gendisk *ps2esdi_gendisk[2];
+
+/* initialization routine called by ll_rw_blk.c   */
+static int __init ps2esdi_init(void)
+{
+
+        int error = 0;
+
+        /* register the device - pass the name and major number */
+        if (register_blkdev(PS2ESDI_MAJOR, "ed"))
+                return -EBUSY;
+
+        /* set up some global information - indicating device specific info */
+        ps2esdi_queue = blk_init_queue(do_ps2esdi_request, &ps2esdi_lock);
+        if (!ps2esdi_queue) {
+                unregister_blkdev(PS2ESDI_MAJOR, "ed");
+                return -ENOMEM;
+        }
+
+        /* some minor housekeeping - setup the global gendisk structure */
+        error = ps2esdi_geninit();
+        if (error) {
+                printk(KERN_WARNING "PS2ESDI: error initialising"
+                        " device, releasing resources\n");
+                unregister_blkdev(PS2ESDI_MAJOR, "ed");
+                blk_cleanup_queue(ps2esdi_queue);
+                return error;
+        }
+        return 0;
+}                               /* ps2esdi_init */
+
+#ifndef MODULE
+
+module_init(ps2esdi_init);
+
+#else
+
+static int cyl[MAX_HD] = {-1,-1};
+static int head[MAX_HD] = {-1, -1};
+static int sect[MAX_HD] = {-1, -1};
+
+module_param(tp720esdi, bool, 0);
+module_param_array(cyl, int, NULL, 0);
+module_param_array(head, int, NULL, 0);
+module_param_array(sect, int, NULL, 0);
+MODULE_LICENSE("GPL");
+
+int init_module(void) {
+        int drive;
+
+        for(drive = 0; drive < MAX_HD; drive++) {
+                struct ps2esdi_i_struct *info = &ps2esdi_info[drive];
+
+                if (cyl[drive] != -1) {
+                        info->cyl = info->lzone = cyl[drive];
+                        info->wpcom = 0;
+                }
+                if (head[drive] != -1) {
+                        info->head = head[drive];
+                        info->ctl = (head[drive] > 8 ? 8 : 0);
+                }
+                if (sect[drive] != -1) info->sect = sect[drive];
+        }
+        return ps2esdi_init();
+}
+
+void
+cleanup_module(void) {
+        int i;
+        if(ps2esdi_slot) {
+                mca_mark_as_unused(ps2esdi_slot);
+                mca_set_adapter_procfn(ps2esdi_slot, NULL, NULL);
+        }
+        release_region(io_base, 4);
+        free_dma(dma_arb_level);
+        free_irq(PS2ESDI_IRQ, &ps2esdi_gendisk);
+        unregister_blkdev(PS2ESDI_MAJOR, "ed");
+        blk_cleanup_queue(ps2esdi_queue);
+        for (i = 0; i < ps2esdi_drives; i++) {
+                del_gendisk(ps2esdi_gendisk[i]);
+                put_disk(ps2esdi_gendisk[i]);
+        }
+}
+#endif /* MODULE */
+
+/* handles boot time command line parameters */
+void __init tp720_setup(char *str, int *ints)
+{
+        /* no params, just sets the tp720esdi flag if it exists */
+
+        printk("%s: TP 720 ESDI flag set\n", DEVICE_NAME);
+        tp720esdi = 1;
+}
+
+void __init ed_setup(char *str, int *ints)
+{
+        int hdind = 0;
+
+        /* handles 3 parameters only - corresponding to
+           1. Number of cylinders
+           2. Number of heads
+           3. Sectors/track
+         */
+
+        if (ints[0] != 3)
+                return;
+
+        /* print out the information - seen at boot time */
+        printk("%s: ints[0]=%d ints[1]=%d ints[2]=%d ints[3]=%d\n",
+               DEVICE_NAME, ints[0], ints[1], ints[2], ints[3]);
+
+        /* set the index into device specific information table */
+        if (ps2esdi_info[0].head != 0)
+                hdind = 1;
+
+        /* set up all the device information */
+        ps2esdi_info[hdind].head = ints[2];
+        ps2esdi_info[hdind].sect = ints[3];
+        ps2esdi_info[hdind].cyl = ints[1];
+        ps2esdi_info[hdind].wpcom = 0;
+        ps2esdi_info[hdind].lzone = ints[1];
+        ps2esdi_info[hdind].ctl = (ints[2] > 8 ? 8 : 0);
+#if 0                           /* this may be needed for PS2/Mod.80, but it hurts ThinkPad! */
+        ps2esdi_drives = hdind + 1;     /* increment index for the next time */
+#endif
+}                               /* ed_setup */
+
+static int ps2esdi_getinfo(char *buf, int slot, void *d)
+{
+        int len = 0;
+
+        len += sprintf(buf + len, "DMA Arbitration Level: %d\n",
+                       dma_arb_level);
+        len += sprintf(buf + len, "IO Port: %x\n", io_base);
+        len += sprintf(buf + len, "IRQ: 14\n");
+        len += sprintf(buf + len, "Drives: %d\n", ps2esdi_drives);
+
+        return len;
+}
+
+/* ps2 esdi specific initialization - called thru the gendisk chain */
+static int __init ps2esdi_geninit(void)
+{
+        /*
+           The first part contains the initialization code
+           for the ESDI disk subsystem.  All we really do
+           is search for the POS registers of the controller
+           to do some simple setup operations.  First, we
+           must ensure that the controller is installed,
+           enabled, and configured as PRIMARY.  Then we must
+           determine the DMA arbitration level being used by
+           the controller so we can handle data transfer
+           operations properly.  If all of this works, then
+           we will set the INIT_FLAG to a non-zero value.
+         */
+
+        int slot = 0, i, reset_start, reset_end;
+        u_char status;
+        unsigned short adapterID;
+        int error = 0;
+
+        if ((slot = mca_find_adapter(INTG_ESDI_ID, 0)) != MCA_NOTFOUND) {
+                adapterID = INTG_ESDI_ID;
+                printk("%s: integrated ESDI adapter found in slot %d\n",
+                       DEVICE_NAME, slot+1);
+#ifndef MODULE
+                mca_set_adapter_name(slot, "PS/2 Integrated ESDI");
+#endif
+        } else if ((slot = mca_find_adapter(NRML_ESDI_ID, 0)) != -1) {
+                adapterID = NRML_ESDI_ID;
+                printk("%s: normal ESDI adapter found in slot %d\n",
+                       DEVICE_NAME, slot+1);
+                mca_set_adapter_name(slot, "PS/2 ESDI");
+        } else {
+                return -ENODEV;
+        }
+
+        ps2esdi_slot = slot;
+        mca_mark_as_used(slot);
+        mca_set_adapter_procfn(slot, (MCA_ProcFn) ps2esdi_getinfo, NULL);
+
+        /* Found the slot - read the POS register 2 to get the necessary
+           configuration and status information.  POS register 2 has the
+           following information :
+           Bit           Function
+           7             reserved = 0
+           6             arbitration method
+           0 - fairness enabled
+           1 - fairness disabled, linear priority assignment
+           5-2           arbitration level
+           1             alternate address
+           1              alternate address
+           0 - use addresses 0x3510 - 0x3517
+           0             adapter enable
+         */
+
+        status = mca_read_stored_pos(slot, 2);
+        /* is it enabled ? */
+        if (!(status & STATUS_ENABLED)) {
+                printk("%s: ESDI adapter disabled\n", DEVICE_NAME);
+                error = -ENODEV;
+                goto err_out1;
+        }
+        /* try to grab IRQ, and try to grab a slow IRQ if it fails, so we can
+           share with the SCSI driver */
+        if (request_irq(PS2ESDI_IRQ, ps2esdi_interrupt_handler,
+                  SA_INTERRUPT | SA_SHIRQ, "PS/2 ESDI", &ps2esdi_gendisk)
+            && request_irq(PS2ESDI_IRQ, ps2esdi_interrupt_handler,
+                           SA_SHIRQ, "PS/2 ESDI", &ps2esdi_gendisk)
+            ) {
+                printk("%s: Unable to get IRQ %d\n", DEVICE_NAME, PS2ESDI_IRQ);
+                error = -EBUSY;
+                goto err_out1;
+        }
+        if (status & STATUS_ALTERNATE)
+                io_base = ALT_IO_BASE;
+        else
+                io_base = PRIMARY_IO_BASE;
+
+        if (!request_region(io_base, 4, "ed")) {
+                printk(KERN_WARNING"Unable to request region 0x%x\n", io_base);
+                error = -EBUSY;
+                goto err_out2;
+        }
+        /* get the dma arbitration level */
+        dma_arb_level = (status >> 2) & 0xf;
+
+        /* BA */
+        printk("%s: DMA arbitration level : %d\n",
+               DEVICE_NAME, dma_arb_level);
+
+        LITE_ON;
+        current_int_handler = ps2esdi_initial_reset_int_handler;
+        reset_ctrl();
+        reset_status = 0;
+        reset_start = jiffies;
+        while (!reset_status) {
+                init_timer(&esdi_timer);
+                esdi_timer.expires = jiffies + HZ;
+                esdi_timer.data = 0;
+                add_timer(&esdi_timer);
+                sleep_on(&ps2esdi_int);
+        }
+        reset_end = jiffies;
+        LITE_OFF;
+        printk("%s: reset interrupt after %d jiffies,  %u.%02u secs\n",
+               DEVICE_NAME, reset_end - reset_start, (reset_end - reset_start) / HZ,
+               (reset_end - reset_start) % HZ);
+
+
+        /* Integrated ESDI Disk and Controller has only one drive! */
+        if (adapterID == INTG_ESDI_ID) {/* if not "normal" PS2 ESDI adapter */
+                ps2esdi_drives = 1;     /* then we have only one physical disk! */              intg_esdi = 1;
+        }
+
+
+
+        /* finally this part sets up some global data structures etc. */
+
+        ps2esdi_get_device_cfg();
+
+        /* some annoyance in the above routine returns TWO drives?
+         Is something else happining in the background?
+         Regaurdless we fix the # of drives again. AJK */
+        /* Integrated ESDI Disk and Controller has only one drive! */
+        if (adapterID == INTG_ESDI_ID)  /* if not "normal" PS2 ESDI adapter */
+                ps2esdi_drives = 1;     /* Not three or two, ONE DAMNIT! */
+
+        current_int_handler = ps2esdi_normal_interrupt_handler;
+
+        if (request_dma(dma_arb_level, "ed") !=0) {
+                printk(KERN_WARNING "PS2ESDI: Can't request dma-channel %d\n"
+                        ,(int) dma_arb_level);
+                error = -EBUSY;
+                goto err_out3;
+        }
+        blk_queue_max_sectors(ps2esdi_queue, 128);
+
+        error = -ENOMEM;
+        for (i = 0; i < ps2esdi_drives; i++) {
+                struct gendisk *disk = alloc_disk(64);
+                if (!disk)
+                        goto err_out4;
+                disk->major = PS2ESDI_MAJOR;
+                disk->first_minor = i<<6;
+                sprintf(disk->disk_name, "ed%c", 'a'+i);
+                sprintf(disk->devfs_name, "ed/target%d", i);
+                disk->fops = &ps2esdi_fops;
+                ps2esdi_gendisk[i] = disk;
+        }
+
+        for (i = 0; i < ps2esdi_drives; i++) {
+                struct gendisk *disk = ps2esdi_gendisk[i];
+                set_capacity(disk, ps2esdi_info[i].head * ps2esdi_info[i].sect *
+                                ps2esdi_info[i].cyl);
+                disk->queue = ps2esdi_queue;
+                disk->private_data = &ps2esdi_info[i];
+                add_disk(disk);
+        }
+        return 0;
+err_out4:
+        while (i--)
+                put_disk(ps2esdi_gendisk[i]);
+err_out3:
+        release_region(io_base, 4);
+err_out2:
+        free_irq(PS2ESDI_IRQ, &ps2esdi_gendisk);
+err_out1:
+        if(ps2esdi_slot) {
+                mca_mark_as_unused(ps2esdi_slot);
+                mca_set_adapter_procfn(ps2esdi_slot, NULL, NULL);
+        }
+        return error;
+}
+
+static void __init ps2esdi_get_device_cfg(void)
+{
+        u_short cmd_blk[TYPE_0_CMD_BLK_LENGTH];
+
+        /*BA */ printk("%s: Drive 0\n", DEVICE_NAME);
+        current_int_handler = ps2esdi_geometry_int_handler;
+        cmd_blk[0] = CMD_GET_DEV_CONFIG | 0x600;
+        cmd_blk[1] = 0;
+        no_int_yet = TRUE;
+        ps2esdi_out_cmd_blk(cmd_blk);
+        if (no_int_yet)
+                sleep_on(&ps2esdi_int);
+
+        if (ps2esdi_drives > 1) {
+                printk("%s: Drive 1\n", DEVICE_NAME);   /*BA */
+                cmd_blk[0] = CMD_GET_DEV_CONFIG | (1 << 5) | 0x600;
+                cmd_blk[1] = 0;
+                no_int_yet = TRUE;
+                ps2esdi_out_cmd_blk(cmd_blk);
+                if (no_int_yet)
+                        sleep_on(&ps2esdi_int);
+        }                       /* if second physical drive is present */
+        return;
+}
+
+/* strategy routine that handles most of the IO requests */
+static void do_ps2esdi_request(request_queue_t * q)
+{
+        struct request *req;
+        /* since, this routine is called with interrupts cleared - they 
+           must be before it finishes  */
+
+        req = elv_next_request(q);
+        if (!req)
+                return;
+
+#if 0
+        printk("%s:got request. device : %s command : %d  sector : %ld count : %ld, buffer: %p\n",
+               DEVICE_NAME,
+               req->rq_disk->disk_name,
+               req->cmd, req->sector,
+               req->current_nr_sectors, req->buffer);
+#endif
+
+        /* check for above 16Mb dmas */
+        if (isa_virt_to_bus(req->buffer + req->current_nr_sectors * 512) > 16 * MB) {
+                printk("%s: DMA above 16MB not supported\n", DEVICE_NAME);
+                end_request(req, FAIL);
+                return;
+        }
+
+        if (req->sector+req->current_nr_sectors > get_capacity(req->rq_disk)) {
+                printk("Grrr. error. ps2esdi_drives: %d, %llu %llu\n",
+                    ps2esdi_drives, req->sector,
+                    (unsigned long long)get_capacity(req->rq_disk));
+                end_request(req, FAIL);
+                return;
+        }
+
+        switch (rq_data_dir(req)) {
+        case READ:
+                ps2esdi_readwrite(READ, req);
+                break;
+        case WRITE:
+                ps2esdi_readwrite(WRITE, req);
+                break;
+        default:
+                printk("%s: Unknown command\n", req->rq_disk->disk_name);
+                end_request(req, FAIL);
+                break;
+        }               /* handle different commands */
+}                               /* main strategy routine */
+
+/* resets the ESDI adapter */
+static void reset_ctrl(void)
+{
+
+        u_long expire;
+        u_short status;
+
+        /* enable interrupts on the controller */
+        status = inb(ESDI_INTRPT);
+        outb((status & 0xe0) | ATT_EOI, ESDI_ATTN);     /* to be sure we don't have
+                                                           any interrupt pending... */
+        outb_p(CTRL_ENABLE_INTR, ESDI_CONTROL);
+
+        /* read the ESDI status port - if the controller is not busy,
+           simply do a soft reset (fast) - otherwise we'll have to do a
+           hard (slow) reset.  */
+        if (!(inb_p(ESDI_STATUS) & STATUS_BUSY)) {
+                /*BA */ printk("%s: soft reset...\n", DEVICE_NAME);
+                outb_p(CTRL_SOFT_RESET, ESDI_ATTN);
+        }
+        /* soft reset */ 
+        else {
+                /*BA */
+                printk("%s: hard reset...\n", DEVICE_NAME);
+                outb_p(CTRL_HARD_RESET, ESDI_CONTROL);
+                expire = jiffies + 2*HZ;
+                while (time_before(jiffies, expire));
+                outb_p(1, ESDI_CONTROL);
+        }                       /* hard reset */
+
+
+}                               /* reset the controller */
+
+/* called by the strategy routine to handle read and write requests */
+static void ps2esdi_readwrite(int cmd, struct request *req)
+{
+        struct ps2esdi_i_struct *p = req->rq_disk->private_data;
+        unsigned block = req->sector;
+        unsigned count = req->current_nr_sectors;
+        int drive = p - ps2esdi_info;
+        u_short track, head, cylinder, sector;
+        u_short cmd_blk[TYPE_1_CMD_BLK_LENGTH];
+
+        /* do some relevant arithmatic */
+        track = block / p->sect;
+        head = track % p->head;
+        cylinder = track / p->head;
+        sector = block % p->sect;
+
+#if 0
+        printk("%s: cyl=%d head=%d sect=%d\n", DEVICE_NAME, cylinder, head, sector);
+#endif
+        /* call the routine that actually fills out a command block */
+        ps2esdi_fill_cmd_block
+            (cmd_blk,
+             (cmd == READ) ? CMD_READ : CMD_WRITE,
+             cylinder, head, sector, count, drive);
+
+        /* send the command block to the controller */
+        current_req = req;
+        spin_unlock_irq(&ps2esdi_lock);
+        if (ps2esdi_out_cmd_blk(cmd_blk)) {
+                spin_lock_irq(&ps2esdi_lock);
+                printk("%s: Controller failed\n", DEVICE_NAME);
+                if ((++req->errors) >= MAX_RETRIES)
+                        end_request(req, FAIL);
+        }
+        /* check for failure to put out the command block */ 
+        else {
+                spin_lock_irq(&ps2esdi_lock);
+#if 0
+                printk("%s: waiting for xfer\n", DEVICE_NAME);
+#endif
+                /* turn disk lights on */
+                LITE_ON;
+        }
+
+}                               /* ps2esdi_readwrite */
+
+/* fill out the command block */
+static void ps2esdi_fill_cmd_block(u_short * cmd_blk, u_short cmd,
+ u_short cyl, u_short head, u_short sector, u_short length, u_char drive)
+{
+
+        cmd_blk[0] = (drive << 5) | cmd;
+        cmd_blk[1] = length;
+        cmd_blk[2] = ((cyl & 0x1f) << 11) | (head << 5) | sector;
+        cmd_blk[3] = (cyl & 0x3E0) >> 5;
+
+}                               /* fill out the command block */
+
+/* write a command block to the controller */
+static int ps2esdi_out_cmd_blk(u_short * cmd_blk)
+{
+
+        int i;
+        unsigned long jif;
+        u_char status;
+
+        /* enable interrupts */
+        outb(CTRL_ENABLE_INTR, ESDI_CONTROL);
+
+        /* do not write to the controller, if it is busy */
+        for (jif = jiffies + ESDI_STAT_TIMEOUT;
+                time_after(jif, jiffies) &&
+                        (inb(ESDI_STATUS) & STATUS_BUSY); )
+                ;
+
+#if 0
+        printk("%s: i(1)=%ld\n", DEVICE_NAME, jif);
+#endif
+
+        /* if device is still busy - then just time out */
+        if (inb(ESDI_STATUS) & STATUS_BUSY) {
+                printk("%s: ps2esdi_out_cmd timed out (1)\n", DEVICE_NAME);
+                return ERROR;
+        }                       /* timeout ??? */
+        /* Set up the attention register in the controller */
+        outb(((*cmd_blk) & 0xE0) | 1, ESDI_ATTN);
+
+#if 0
+        printk("%s: sending %d words to controller\n", DEVICE_NAME, (((*cmd_blk) >> 14) + 1) << 1);
+#endif
+
+        /* one by one send each word out */
+        for (i = (((*cmd_blk) >> 14) + 1) << 1; i; i--) {
+                status = inb(ESDI_STATUS);
+                for (jif = jiffies + ESDI_STAT_TIMEOUT;
+                     time_after(jif, jiffies) && (status & STATUS_BUSY) &&
+                   (status & STATUS_CMD_INF); status = inb(ESDI_STATUS));
+                if ((status & (STATUS_BUSY | STATUS_CMD_INF)) == STATUS_BUSY) {
+#if 0
+                        printk("%s: sending %04X\n", DEVICE_NAME, *cmd_blk);
+#endif
+                        outw(*cmd_blk++, ESDI_CMD_INT);
+                } else {
+                        printk("%s: ps2esdi_out_cmd timed out while sending command (status=%02X)\n",
+                               DEVICE_NAME, status);
+                        return ERROR;
+                }
+        }                       /* send all words out */
+        return OK;
+}                               /* send out the commands */
+
+
+/* prepare for dma - do all the necessary setup */
+static void ps2esdi_prep_dma(char *buffer, u_short length, u_char dma_xmode)
+{
+        unsigned long flags = claim_dma_lock();
+
+        mca_disable_dma(dma_arb_level);
+
+        mca_set_dma_addr(dma_arb_level, isa_virt_to_bus(buffer));
+
+        mca_set_dma_count(dma_arb_level, length * 512 / 2);
+
+        mca_set_dma_mode(dma_arb_level, dma_xmode);
+
+        mca_enable_dma(dma_arb_level);
+
+        release_dma_lock(flags);
+
+}                               /* prepare for dma */
+
+
+
+static irqreturn_t ps2esdi_interrupt_handler(int irq, void *dev_id,
+                                      struct pt_regs *regs)
+{
+        u_int int_ret_code;
+
+        if (inb(ESDI_STATUS) & STATUS_INTR) {
+                int_ret_code = inb(ESDI_INTRPT);
+                if (current_int_handler) {
+                        /* Disable adapter interrupts till processing is finished */
+                        outb(CTRL_DISABLE_INTR, ESDI_CONTROL);
+                        current_int_handler(int_ret_code);
+                } else
+                        printk("%s: help ! No interrupt handler.\n", DEVICE_NAME);
+        } else {
+                return IRQ_NONE;
+        }
+        return IRQ_HANDLED;
+}
+
+static void ps2esdi_initial_reset_int_handler(u_int int_ret_code)
+{
+
+        switch (int_ret_code & 0xf) {
+        case INT_RESET:
+                /*BA */
+                printk("%s: initial reset completed.\n", DEVICE_NAME);
+                outb((int_ret_code & 0xe0) | ATT_EOI, ESDI_ATTN);
+                wake_up(&ps2esdi_int);
+                break;
+        case INT_ATTN_ERROR:
+                printk("%s: Attention error. interrupt status : %02X\n", DEVICE_NAME,
+                       int_ret_code);
+                printk("%s: status: %02x\n", DEVICE_NAME, inb(ESDI_STATUS));
+                break;
+        default:
+                printk("%s: initial reset handler received interrupt: %02X\n",
+                       DEVICE_NAME, int_ret_code);
+                outb((int_ret_code & 0xe0) | ATT_EOI, ESDI_ATTN);
+                break;
+        }
+        outb(CTRL_ENABLE_INTR, ESDI_CONTROL);
+}
+
+
+static void ps2esdi_geometry_int_handler(u_int int_ret_code)
+{
+        u_int status, drive_num;
+        unsigned long rba;
+        int i;
+
+        drive_num = int_ret_code >> 5;
+        switch (int_ret_code & 0xf) {
+        case INT_CMD_COMPLETE:
+                for (i = ESDI_TIMEOUT; i && !(inb(ESDI_STATUS) & STATUS_STAT_AVAIL); i--);
+                if (!(inb(ESDI_STATUS) & STATUS_STAT_AVAIL)) {
+                        printk("%s: timeout reading status word\n", DEVICE_NAME);
+                        outb((int_ret_code & 0xe0) | ATT_EOI, ESDI_ATTN);
+                        break;
+                }
+                status = inw(ESDI_STT_INT);
+                if ((status & 0x1F) == CMD_GET_DEV_CONFIG) {
+#define REPLY_WORDS 5           /* we already read word 0 */
+                        u_short reply[REPLY_WORDS];
+
+                        if (ps2esdi_read_status_words((status >> 8) - 1, REPLY_WORDS, reply)) {
+                                /*BA */
+                                printk("%s: Device Configuration Status for drive %u\n",
+                                       DEVICE_NAME, drive_num);
+
+                                printk("%s: Spares/cyls: %u", DEVICE_NAME, reply[0] >> 8);
+
+                                printk
+                                    ("Config bits: %s%s%s%s%s\n",
+                                     (reply[0] & CONFIG_IS) ? "Invalid Secondary, " : "",
+                                     ((reply[0] & CONFIG_ZD) && !(reply[0] & CONFIG_IS))
+                                 ? "Zero Defect, " : "Defects Present, ",
+                                     (reply[0] & CONFIG_SF) ? "Skewed Format, " : "",
+                                     (reply[0] & CONFIG_FR) ? "Removable, " : "Non-Removable, ",
+                                     (reply[0] & CONFIG_RT) ? "No Retries" : "Retries");
+
+                                rba = reply[1] | ((unsigned long) reply[2] << 16);
+                                printk("%s: Number of RBA's: %lu\n", DEVICE_NAME, rba);
+
+                                printk("%s: Physical number of cylinders: %u, Sectors/Track: %u, Heads: %u\n",
+                                       DEVICE_NAME, reply[3], reply[4] >> 8, reply[4] & 0xff);
+
+                                if (!ps2esdi_info[drive_num].head) {
+                                        ps2esdi_info[drive_num].head = 64;
+                                        ps2esdi_info[drive_num].sect = 32;
+                                        ps2esdi_info[drive_num].cyl = rba / (64 * 32);
+                                        ps2esdi_info[drive_num].wpcom = 0;
+                                        ps2esdi_info[drive_num].lzone = ps2esdi_info[drive_num].cyl;
+                                        ps2esdi_info[drive_num].ctl = 8;
+                                        if (tp720esdi) {        /* store the retrieved parameters */
+                                                ps2esdi_info[0].head = reply[4] & 0Xff;
+                                                ps2esdi_info[0].sect = reply[4] >> 8;
+                                                ps2esdi_info[0].cyl = reply[3];
+                                                ps2esdi_info[0].wpcom = 0;
+                                                ps2esdi_info[0].lzone = reply[3];
+                                        } else {
+                                                if (!intg_esdi)
+                                                        ps2esdi_drives++;
+                                        }
+                                }
+#ifdef OBSOLETE
+                                if (!ps2esdi_info[drive_num].head) {
+                                        ps2esdi_info[drive_num].head = reply[4] & 0Xff;
+                                        ps2esdi_info[drive_num].sect = reply[4] >> 8;
+                                        ps2esdi_info[drive_num].cyl = reply[3];
+                                        ps2esdi_info[drive_num].wpcom = 0;
+                                        ps2esdi_info[drive_num].lzone = reply[3];
+                                        if (tp720esdi) {        /* store the retrieved parameters */
+                                                ps2esdi_info[0].head = reply[4] & 0Xff;
+                                                ps2esdi_info[0].sect = reply[4] >> 8;
+                                                ps2esdi_info[0].cyl = reply[3];
+                                                ps2esdi_info[0].wpcom = 0;
+                                                ps2esdi_info[0].lzone = reply[3];
+                                        } else {
+                                                ps2esdi_drives++;
+                                        }
+                                }
+#endif
+
+                        } else
+                                printk("%s: failed while getting device config\n", DEVICE_NAME);
+#undef REPLY_WORDS
+                } else
+                        printk("%s: command %02X unknown by geometry handler\n",
+                               DEVICE_NAME, status & 0x1f);
+
+                outb((int_ret_code & 0xe0) | ATT_EOI, ESDI_ATTN);
+                break;
+
+        case INT_ATTN_ERROR:
+                printk("%s: Attention error. interrupt status : %02X\n", DEVICE_NAME,
+                       int_ret_code);
+                printk("%s: Device not available\n", DEVICE_NAME);
+                break;
+        case INT_CMD_ECC:
+        case INT_CMD_RETRY:
+        case INT_CMD_ECC_RETRY:
+        case INT_CMD_WARNING:
+        case INT_CMD_ABORT:
+        case INT_CMD_FAILED:
+        case INT_DMA_ERR:
+        case INT_CMD_BLK_ERR:
+                /*BA */ printk("%s: Whaa. Error occurred...\n", DEVICE_NAME);
+                dump_cmd_complete_status(int_ret_code);
+                outb((int_ret_code & 0xe0) | ATT_EOI, ESDI_ATTN);
+                break;
+        default:
+                printk("%s: Unknown interrupt reason: %02X\n",
+                       DEVICE_NAME, int_ret_code & 0xf);
+                outb((int_ret_code & 0xe0) | ATT_EOI, ESDI_ATTN);
+                break;
+        }
+
+        wake_up(&ps2esdi_int);
+        no_int_yet = FALSE;
+        outb(CTRL_ENABLE_INTR, ESDI_CONTROL);
+
+}
+
+static void ps2esdi_normal_interrupt_handler(u_int int_ret_code)
+{
+        unsigned long flags;
+        u_int status;
+        u_int ending;
+        int i;
+
+        switch (int_ret_code & 0x0f) {
+        case INT_TRANSFER_REQ:
+                ps2esdi_prep_dma(current_req->buffer,
+                                 current_req->current_nr_sectors,
+                    (rq_data_dir(current_req) == READ)
+                    ? MCA_DMA_MODE_16 | MCA_DMA_MODE_WRITE | MCA_DMA_MODE_XFER
+                    : MCA_DMA_MODE_16 | MCA_DMA_MODE_READ);
+                outb(CTRL_ENABLE_DMA | CTRL_ENABLE_INTR, ESDI_CONTROL);
+                ending = -1;
+                break;
+
+        case INT_ATTN_ERROR:
+                printk("%s: Attention error. interrupt status : %02X\n", DEVICE_NAME,
+                       int_ret_code);
+                outb(CTRL_ENABLE_INTR, ESDI_CONTROL);
+                ending = FAIL;
+                break;
+
+        case INT_CMD_COMPLETE:
+                for (i = ESDI_TIMEOUT; i && !(inb(ESDI_STATUS) & STATUS_STAT_AVAIL); i--);
+                if (!(inb(ESDI_STATUS) & STATUS_STAT_AVAIL)) {
+                        printk("%s: timeout reading status word\n", DEVICE_NAME);
+                        outb((int_ret_code & 0xe0) | ATT_EOI, ESDI_ATTN);
+                        outb(CTRL_ENABLE_INTR, ESDI_CONTROL);
+                        if ((++current_req->errors) >= MAX_RETRIES)
+                                ending = FAIL;
+                        else
+                                ending = -1;
+                        break;
+                }
+                status = inw(ESDI_STT_INT);
+                switch (status & 0x1F) {
+                case (CMD_READ & 0xff):
+                case (CMD_WRITE & 0xff):
+                        LITE_OFF;
+                        outb((int_ret_code & 0xe0) | ATT_EOI, ESDI_ATTN);
+                        outb(CTRL_ENABLE_INTR, ESDI_CONTROL);
+                        ending = SUCCES;
+                        break;
+                default:
+                        printk("%s: interrupt for unknown command %02X\n",
+                               DEVICE_NAME, status & 0x1f);
+                        outb((int_ret_code & 0xe0) | ATT_EOI, ESDI_ATTN);
+                        outb(CTRL_ENABLE_INTR, ESDI_CONTROL);
+                        ending = -1;
+                        break;
+                }
+                break;
+        case INT_CMD_ECC:
+        case INT_CMD_RETRY:
+        case INT_CMD_ECC_RETRY:
+                LITE_OFF;
+                dump_cmd_complete_status(int_ret_code);
+                outb((int_ret_code & 0xe0) | ATT_EOI, ESDI_ATTN);
+                outb(CTRL_ENABLE_INTR, ESDI_CONTROL);
+                ending = SUCCES;
+                break;
+        case INT_CMD_WARNING:
+        case INT_CMD_ABORT:
+        case INT_CMD_FAILED:
+        case INT_DMA_ERR:
+                LITE_OFF;
+                dump_cmd_complete_status(int_ret_code);
+                outb((int_ret_code & 0xe0) | ATT_EOI, ESDI_ATTN);
+                outb(CTRL_ENABLE_INTR, ESDI_CONTROL);
+                if ((++current_req->errors) >= MAX_RETRIES)
+                        ending = FAIL;
+                else
+                        ending = -1;
+                break;
+
+        case INT_CMD_BLK_ERR:
+                dump_cmd_complete_status(int_ret_code);
+                outb((int_ret_code & 0xe0) | ATT_EOI, ESDI_ATTN);
+                outb(CTRL_ENABLE_INTR, ESDI_CONTROL);
+                ending = FAIL;
+                break;
+
+        case INT_CMD_FORMAT:
+                printk("%s: huh ? Who issued this format command ?\n"
+                       ,DEVICE_NAME);
+                outb((int_ret_code & 0xe0) | ATT_EOI, ESDI_ATTN);
+                outb(CTRL_ENABLE_INTR, ESDI_CONTROL);
+                ending = -1;
+                break;
+
+        case INT_RESET:
+                /* BA printk("%s: reset completed.\n", DEVICE_NAME) */ ;
+                outb((int_ret_code & 0xe0) | ATT_EOI, ESDI_ATTN);
+                outb(CTRL_ENABLE_INTR, ESDI_CONTROL);
+                ending = -1;
+                break;
+
+        default:
+                printk("%s: Unknown interrupt reason: %02X\n",
+                       DEVICE_NAME, int_ret_code & 0xf);
+                outb((int_ret_code & 0xe0) | ATT_EOI, ESDI_ATTN);
+                outb(CTRL_ENABLE_INTR, ESDI_CONTROL);
+                ending = -1;
+                break;
+        }
+        if(ending != -1) {
+                spin_lock_irqsave(&ps2esdi_lock, flags);
+                end_request(current_req, ending);
+                current_req = NULL;
+                do_ps2esdi_request(ps2esdi_queue);
+                spin_unlock_irqrestore(&ps2esdi_lock, flags);
+        }
+}                               /* handle interrupts */
+
+
+
+static int ps2esdi_read_status_words(int num_words,
+                                     int max_words,
+                                     u_short * buffer)
+{
+        int i;
+
+        for (; max_words && num_words; max_words--, num_words--, buffer++) {
+                for (i = ESDI_TIMEOUT; i && !(inb(ESDI_STATUS) & STATUS_STAT_AVAIL); i--);
+                if (!(inb(ESDI_STATUS) & STATUS_STAT_AVAIL)) {
+                        printk("%s: timeout reading status word\n", DEVICE_NAME);
+                        return FAIL;
+                }
+                *buffer = inw(ESDI_STT_INT);
+        }
+        return SUCCES;
+}
+
+
+
+
+static void dump_cmd_complete_status(u_int int_ret_code)
+{
+#define WAIT_FOR_STATUS \
+  for(i=ESDI_TIMEOUT;i && !(inb(ESDI_STATUS) & STATUS_STAT_AVAIL);i--); \
+    if(!(inb(ESDI_STATUS) & STATUS_STAT_AVAIL)) { \
+    printk("%s: timeout reading status word\n",DEVICE_NAME); \
+    return; \
+    }
+
+        int i, word_count;
+        u_short stat_word;
+        u_long rba;
+
+        printk("%s: Device: %u, interrupt ID: %02X\n",
+               DEVICE_NAME, int_ret_code >> 5,
+               int_ret_code & 0xf);
+
+        WAIT_FOR_STATUS;
+        stat_word = inw(ESDI_STT_INT);
+        word_count = (stat_word >> 8) - 1;
+        printk("%s: %u status words, command: %02X\n", DEVICE_NAME, word_count,
+               stat_word & 0xff);
+
+        if (word_count--) {
+                WAIT_FOR_STATUS;
+                stat_word = inw(ESDI_STT_INT);
+                printk("%s: command status code: %02X, command error code: %02X\n",
+                       DEVICE_NAME, stat_word >> 8, stat_word & 0xff);
+        }
+        if (word_count--) {
+                WAIT_FOR_STATUS;
+                stat_word = inw(ESDI_STT_INT);
+                printk("%s: device error code: %s%s%s%s%s,%02X\n", DEVICE_NAME,
+                       (stat_word & 0x1000) ? "Ready, " : "Not Ready, ",
+                  (stat_word & 0x0800) ? "Selected, " : "Not Selected, ",
+                       (stat_word & 0x0400) ? "Write Fault, " : "",
+                       (stat_word & 0x0200) ? "Track 0, " : "",
+                (stat_word & 0x0100) ? "Seek or command complete, " : "",
+                       stat_word >> 8);
+        }
+        if (word_count--) {
+                WAIT_FOR_STATUS;
+                stat_word = inw(ESDI_STT_INT);
+                printk("%s: Blocks to do: %u", DEVICE_NAME, stat_word);
+        }
+        if (word_count -= 2) {
+                WAIT_FOR_STATUS;
+                rba = inw(ESDI_STT_INT);
+                WAIT_FOR_STATUS;
+                rba |= inw(ESDI_STT_INT) << 16;
+                printk(", Last Cyl: %u Head: %u Sector: %u\n",
+                       (u_short) ((rba & 0x1ff80000) >> 11),
+                 (u_short) ((rba & 0x7E0) >> 5), (u_short) (rba & 0x1f));
+        } else
+                printk("\n");
+
+        if (word_count--) {
+                WAIT_FOR_STATUS;
+                stat_word = inw(ESDI_STT_INT);
+                printk("%s: Blocks required ECC: %u", DEVICE_NAME, stat_word);
+        }
+        printk("\n");
+
+#undef WAIT_FOR_STATUS
+
+}
+
+static int ps2esdi_ioctl(struct inode *inode,
+                         struct file *file, u_int cmd, u_long arg)
+{
+        struct ps2esdi_i_struct *p = inode->i_bdev->bd_disk->private_data;
+        struct ps2esdi_geometry geom;
+
+        if (cmd != HDIO_GETGEO)
+                return -EINVAL;
+        memset(&geom, 0, sizeof(geom));
+        geom.heads = p->head;
+        geom.sectors = p->sect;
+        geom.cylinders = p->cyl;
+        geom.start = get_start_sect(inode->i_bdev);
+        if (copy_to_user((void __user *)arg, &geom, sizeof(geom)))
+                return -EFAULT;
+        return 0;
+}
+
+static void ps2esdi_reset_timer(unsigned long unused)
+{
+
+        int status;
+
+        status = inb(ESDI_INTRPT);
+        if ((status & 0xf) == INT_RESET) {
+                outb((status & 0xe0) | ATT_EOI, ESDI_ATTN);
+                outb(CTRL_ENABLE_INTR, ESDI_CONTROL);
+                reset_status = 1;
+        }
+        wake_up(&ps2esdi_int);
+}