patch-2.1.15 linux/drivers/block/ps2esdi.c
Next file: linux/drivers/cdrom/cdu31a.c
Previous file: linux/drivers/block/ll_rw_blk.c
Back to the patch index
Back to the overall index
- Lines: 1179
- Date:
Thu Dec 12 16:51:08 1996
- Orig file:
v2.1.14/linux/drivers/block/ps2esdi.c
- Orig date:
Thu Jan 1 02:00:00 1970
diff -u --recursive --new-file v2.1.14/linux/drivers/block/ps2esdi.c linux/drivers/block/ps2esdi.c
@@ -0,0 +1,1178 @@
+/* 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
+ */
+
+#include <linux/config.h>
+#include <linux/major.h>
+
+#ifdef CONFIG_BLK_DEV_PS2
+
+#define MAJOR_NR PS2ESDI_MAJOR
+
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/kernel.h>
+#include <linux/genhd.h>
+#include <linux/ps2esdi.h>
+#include <linux/blk.h>
+#include <linux/mca.h>
+
+#include <asm/system.h>
+#include <asm/io.h>
+#include <asm/segment.h>
+#include <asm/dma.h>
+#include <asm/uaccess.h>
+
+#define PS2ESDI_IRQ 14
+#define MAX_HD 1
+#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);
+
+int ps2esdi_init(void);
+
+static void ps2esdi_geninit(struct gendisk *ignored);
+
+static void do_ps2esdi_request(void);
+
+static void ps2esdi_readwrite(int cmd, u_char drive, u_int block, u_int count);
+
+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 void 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 void ps2esdi_continue_request(void);
+
+static int ps2esdi_open(struct inode *inode, struct file *file);
+
+static void ps2esdi_release(struct inode *inode, struct file *file);
+
+static int ps2esdi_ioctl(struct inode *inode, struct file *file,
+ u_int cmd, u_long arg);
+
+static int ps2esdi_reread_partitions(int dev);
+
+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);
+
+void ps2esdi_reset_timer(unsigned long unused);
+
+u_int dma_arb_level; /* DMA arbitration level */
+
+static struct wait_queue *ps2esdi_int = NULL, *ps2esdi_wait_open = NULL;
+int no_int_yet;
+static int access_count[MAX_HD] =
+{0,};
+static char ps2esdi_valid[MAX_HD] =
+{0,};
+static int ps2esdi_sizes[MAX_HD << 6] =
+{0,};
+static int ps2esdi_blocksizes[MAX_HD << 6] =
+{0,};
+static int ps2esdi_drives = 0;
+static struct hd_struct ps2esdi[MAX_HD << 6];
+static u_short io_base;
+static struct timer_list esdi_timer =
+{NULL, NULL, 0, 0L, ps2esdi_reset_timer};
+static int reset_status;
+int tp720esdi = 0; /* Is it Integrated ESDI of ThinkPad-720? */
+
+struct ps2esdi_i_struct {
+ unsigned int head, sect, cyl, wpcom, lzone, ctl;
+};
+
+#if 0
+#if 0 /* try both - I don't know which one is better... UB */
+struct ps2esdi_i_struct ps2esdi_info[] =
+{
+ {4, 48, 1553, 0, 0, 0},
+ {0, 0, 0, 0, 0, 0}};
+#else
+struct ps2esdi_i_struct ps2esdi_info[] =
+{
+ {64, 32, 161, 0, 0, 0},
+ {0, 0, 0, 0, 0, 0}};
+#endif
+#endif
+struct ps2esdi_i_struct ps2esdi_info[] =
+{
+ {0, 0, 0, 0, 0, 0},
+ {0, 0, 0, 0, 0, 0}};
+
+static struct file_operations ps2esdi_fops =
+{
+ NULL, /* lseek - default */
+ block_read, /* read - general block-dev read */
+ block_write, /* write - general block-dev write */
+ NULL, /* readdir - bad */
+ NULL, /* select */
+ ps2esdi_ioctl, /* ioctl */
+ NULL, /* mmap */
+ ps2esdi_open, /* open */
+ ps2esdi_release, /* release */
+ block_fsync /* fsync */
+};
+
+static struct gendisk ps2esdi_gendisk =
+{
+ MAJOR_NR, /* Major number */
+ "ed", /* Major name */
+ 6, /* Bits to shift to get real from partition */
+ 1 << 6, /* Number of partitions per real disk */
+ MAX_HD, /* maximum number of real disks */
+ ps2esdi_geninit, /* init function */
+ ps2esdi, /* hd struct */
+ ps2esdi_sizes, /* block sizes */
+ 0, /* number */
+ (void *) ps2esdi_info, /* internal */
+ NULL /* next */
+};
+
+/* initialization routine called by ll_rw_blk.c */
+int ps2esdi_init(void)
+{
+
+ /* register the device - pass the name, major number and operations
+ vector . */
+ if (register_blkdev(MAJOR_NR, "ed", &ps2esdi_fops)) {
+ printk("%s: Unable to get major number %d\n", DEVICE_NAME, MAJOR_NR);
+ return -1;
+ }
+ /* set up some global information - indicating device specific info */
+ blk_dev[MAJOR_NR].request_fn = DEVICE_REQUEST;
+ read_ahead[MAJOR_NR] = 8; /* 8 sector (4kB) read ahead */
+
+ /* some minor housekeeping - setup the global gendisk structure */
+ ps2esdi_gendisk.next = gendisk_head;
+ gendisk_head = &ps2esdi_gendisk;
+ return 0;
+
+} /* ps2esdi_init */
+
+/* handles boot time command line parameters */
+void 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 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 void ps2esdi_geninit(struct gendisk *ignored)
+{
+ /*
+
+ 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;
+
+ 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;
+ }
+
+ 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);
+ return;
+ }
+ /* 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);
+ return;
+ }
+ if (status & STATUS_ALTERNATE)
+ io_base = ALT_IO_BASE;
+ else
+ io_base = PRIMARY_IO_BASE;
+
+ /* 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) {
+ esdi_timer.expires = 100;
+ esdi_timer.data = 0;
+ esdi_timer.next = esdi_timer.prev = NULL;
+ 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! */
+
+
+
+ /* 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;
+
+ ps2esdi_gendisk.nr_real = ps2esdi_drives;
+
+ for (i = 0; i < ps2esdi_drives; i++) {
+ ps2esdi[i << 6].nr_sects =
+ ps2esdi_info[i].head *
+ ps2esdi_info[i].sect *
+ ps2esdi_info[i].cyl;
+ ps2esdi_valid[i] = 1;
+ }
+ for (i = 0; i < (MAX_HD << 6); i++)
+ ps2esdi_blocksizes[i] = 1024;
+ blksize_size[MAJOR_NR] = ps2esdi_blocksizes;
+} /* ps2esdi_geninit */
+
+
+static void 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(void)
+{
+ u_int block, count;
+ /* since, this routine is called with interrupts cleared - they
+ must be before it finishes */
+ sti();
+
+#if 0
+ printk("%s:got request. device : %d minor : %d command : %d sector : %ld count : %ld, buffer: %p\n",
+ DEVICE_NAME,
+ CURRENT_DEV, MINOR(CURRENT->rq_dev),
+ CURRENT->cmd, CURRENT->sector,
+ CURRENT->nr_sectors, CURRENT->buffer);
+#endif
+
+ /* standard macro that ensures that requests are really on the
+ list + sanity checks. */
+ INIT_REQUEST;
+
+ if (virt_to_bus((u_int) CURRENT->buffer + CURRENT->nr_sectors * 512) > 16 * MB) {
+ printk("%s: DMA above 16MB not supported\n", DEVICE_NAME);
+ end_request(FAIL);
+ if (CURRENT)
+ do_ps2esdi_request();
+ return;
+ } /* check for above 16Mb dmas */
+ if ((CURRENT_DEV < ps2esdi_drives) &&
+ (CURRENT->sector + CURRENT->nr_sectors <=
+ ps2esdi[MINOR(CURRENT->rq_dev)].nr_sects)) {
+#if 0
+ printk("%s:got request. device : %d minor : %d command : %d sector : %ld count : %ld\n",
+ DEVICE_NAME,
+ CURRENT_DEV, MINOR(CURRENT->dev),
+ CURRENT->cmd, CURRENT->sector,
+ CURRENT->nr_sectors);
+#endif
+
+
+ block = CURRENT->sector + ps2esdi[MINOR(CURRENT->rq_dev)].start_sect;
+
+#if 0
+ printk("%s: blocknumber : %d\n", DEVICE_NAME, block);
+#endif
+ count = CURRENT->nr_sectors;
+ switch (CURRENT->cmd) {
+ case READ:
+ ps2esdi_readwrite(READ, CURRENT_DEV, block, count);
+ return;
+ break;
+ case WRITE:
+ ps2esdi_readwrite(WRITE, CURRENT_DEV, block, count);
+ return;
+ break;
+ default:
+ printk("%s: Unknown command\n", DEVICE_NAME);
+ end_request(FAIL);
+ if (CURRENT)
+ do_ps2esdi_request();
+ break;
+ } /* handle different commands */
+ }
+ /* is request is valid */
+ else {
+ printk("Grrr. error. ps2esdi_drives: %d, %lu %lu\n", ps2esdi_drives,
+ CURRENT->sector, ps2esdi[MINOR(CURRENT->rq_dev)].nr_sects);
+ end_request(FAIL);
+ if (CURRENT)
+ do_ps2esdi_request();
+ }
+
+} /* 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 + 200;
+ while (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, u_char drive, u_int block, u_int count)
+{
+
+ u_short track, head, cylinder, sector;
+ u_short cmd_blk[TYPE_1_CMD_BLK_LENGTH];
+
+ /* do some relevant arithmatic */
+ CURRENT->current_nr_sectors =
+ (count < (2 * MAX_16BIT / SECT_SIZE)) ? count : (2 * MAX_16BIT / SECT_SIZE);
+ track = block / ps2esdi_info[drive].sect;
+ head = track % ps2esdi_info[drive].head;
+ cylinder = track / ps2esdi_info[drive].head;
+ sector = block % ps2esdi_info[drive].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,
+ CURRENT->current_nr_sectors, drive);
+
+ /* send the command block to the controller */
+ if (ps2esdi_out_cmd_blk(cmd_blk)) {
+ printk("%s: Controller failed\n", DEVICE_NAME);
+ if ((++CURRENT->errors) < MAX_RETRIES)
+ return do_ps2esdi_request();
+ else {
+ end_request(FAIL);
+ if (CURRENT)
+ do_ps2esdi_request();
+ }
+ }
+ /* check for failure to put out the command block */
+ else {
+#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, j;
+ u_char status;
+
+ /* enable interrupts */
+ outb(CTRL_ENABLE_INTR, ESDI_CONTROL);
+
+ /* do not write to the controller, if it is busy */
+ for (i = jiffies + ESDI_STAT_TIMEOUT; (i > jiffies) && (inb(ESDI_STATUS) &
+ STATUS_BUSY););
+
+#if 0
+ printk("%s: i(1)=%d\n", DEVICE_NAME, i);
+#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 (j = jiffies + ESDI_STAT_TIMEOUT;
+ (j > 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)
+{
+ u_int tc;
+
+ buffer=(char *)virt_to_bus(buffer);
+
+#if 0
+ printk("ps2esdi: b_wait: %p\n", CURRENT->bh->b_wait);
+#endif
+ cli();
+
+ outb(dma_arb_level | DMA_MASK_CHAN, PORT_DMA_FN);
+
+ outb(dma_arb_level | DMA_WRITE_ADDR, PORT_DMA_FN);
+ outb((u_int) buffer & (u_int) 0xff, PORT_DMA_EX);
+ outb(((u_int) buffer >> 8) & (u_int) 0xff, PORT_DMA_EX);
+ outb(((u_int) buffer >> 16) & (u_int) 0xff, PORT_DMA_EX);
+
+ outb(dma_arb_level | DMA_WRITE_TC, PORT_DMA_FN);
+ tc = (length * SECT_SIZE / 2) - 1;
+ outb(tc & 0xff, PORT_DMA_EX);
+ outb((tc >> 8) & 0xff, PORT_DMA_EX);
+
+ outb(dma_arb_level | DMA_WRITE_MODE, PORT_DMA_FN);
+ outb(dma_xmode, PORT_DMA_EX);
+
+ outb(dma_arb_level | DMA_UNMASK_CHAN, PORT_DMA_FN);
+
+ sti();
+
+} /* prepare for dma */
+
+
+
+static void 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;
+ }
+}
+
+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 {
+ 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)
+{
+ u_int status;
+ int i;
+
+ switch (int_ret_code & 0x0f) {
+ case INT_TRANSFER_REQ:
+ ps2esdi_prep_dma(CURRENT->buffer, CURRENT->current_nr_sectors,
+ (CURRENT->cmd == READ) ? DMA_READ_16 : DMA_WRITE_16);
+ outb(CTRL_ENABLE_DMA | CTRL_ENABLE_INTR, ESDI_CONTROL);
+ break;
+
+ case INT_ATTN_ERROR:
+ printk("%s: Attention error. interrupt status : %02X\n", DEVICE_NAME,
+ int_ret_code);
+ outb(CTRL_ENABLE_INTR, ESDI_CONTROL);
+ 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->errors) < MAX_RETRIES)
+ do_ps2esdi_request();
+ else {
+ end_request(FAIL);
+ if (CURRENT)
+ do_ps2esdi_request();
+ }
+ 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);
+#if 0
+ printk("ps2esdi: cmd_complete b_wait: %p\n", CURRENT->bh->b_wait);
+#endif
+ ps2esdi_continue_request();
+ 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);
+ 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);
+ ps2esdi_continue_request();
+ 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->errors) < MAX_RETRIES)
+ do_ps2esdi_request();
+ else {
+ end_request(FAIL);
+ if (CURRENT)
+ do_ps2esdi_request();
+ }
+ 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);
+ end_request(FAIL);
+ if (CURRENT)
+ do_ps2esdi_request();
+ 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);
+ 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);
+ 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);
+ break;
+ }
+
+} /* handle interrupts */
+
+
+static void ps2esdi_continue_request(void)
+{
+ if (CURRENT->nr_sectors -= CURRENT->current_nr_sectors) {
+ CURRENT->buffer += CURRENT->current_nr_sectors * SECT_SIZE;
+ CURRENT->sector += CURRENT->current_nr_sectors;
+ do_ps2esdi_request();
+ } else {
+ end_request(SUCCES);
+ if (CURRENT)
+ do_ps2esdi_request();
+ }
+}
+
+
+
+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_open(struct inode *inode, struct file *file)
+{
+ int dev = DEVICE_NR(MINOR(inode->i_rdev));
+
+#if 0
+ printk("%s: dev= %d\n", DEVICE_NAME, dev);
+#endif
+
+ if (dev < ps2esdi_drives) {
+ while (!ps2esdi_valid[dev])
+ sleep_on(&ps2esdi_wait_open);
+
+ access_count[dev]++;
+
+ return (0);
+ } else
+ return (-ENODEV);
+}
+
+
+
+static void ps2esdi_release(struct inode *inode, struct file *file)
+{
+ int dev = DEVICE_NR(MINOR(inode->i_rdev));
+
+ if (dev < ps2esdi_drives) {
+ sync_dev(dev);
+ access_count[dev]--;
+ }
+}
+
+
+
+static int ps2esdi_ioctl(struct inode *inode,
+ struct file *file, u_int cmd, u_long arg)
+{
+
+ struct ps2esdi_geometry *geometry = (struct ps2esdi_geometry *) arg;
+ int dev = DEVICE_NR(MINOR(inode->i_rdev)), err;
+
+ if (inode && (dev < ps2esdi_drives))
+ switch (cmd) {
+ case HDIO_GETGEO:
+ if (arg) {
+ if ((err = verify_area(VERIFY_WRITE, geometry, sizeof(*geometry))))
+ return (err);
+ put_user(ps2esdi_info[dev].head, (char *) &geometry->heads);
+ put_user(ps2esdi_info[dev].sect, (char *) &geometry->sectors);
+ put_user(ps2esdi_info[dev].cyl, (short *) &geometry->cylinders);
+ put_user(ps2esdi[MINOR(inode->i_rdev)].start_sect,
+ (long *) &geometry->start);
+
+ return (0);
+ }
+ break;
+ case BLKRASET:
+ if (!suser())
+ return -EACCES;
+ if (!inode->i_rdev)
+ return -EINVAL;
+ if (arg > 0xff)
+ return -EINVAL;
+ read_ahead[MAJOR(inode->i_rdev)] = arg;
+ return 0;
+ case BLKGETSIZE:
+ if (arg) {
+ if ((err = verify_area(VERIFY_WRITE, (long *) arg, sizeof(long))))
+ return (err);
+ put_user(ps2esdi[MINOR(inode->i_rdev)].nr_sects, (long *) arg);
+
+ return (0);
+ }
+ break;
+ case BLKFLSBUF:
+ if (!suser())
+ return -EACCES;
+ if (!inode->i_rdev)
+ return -EINVAL;
+ fsync_dev(inode->i_rdev);
+ invalidate_buffers(inode->i_rdev);
+ return 0;
+
+ case BLKRRPART:
+ return (ps2esdi_reread_partitions(inode->i_rdev));
+ RO_IOCTLS(inode->i_rdev, arg);
+ }
+ return (-EINVAL);
+}
+
+
+
+static int ps2esdi_reread_partitions(int dev)
+{
+ int target = DEVICE_NR(MINOR(dev));
+ int start = target << ps2esdi_gendisk.minor_shift;
+ int partition;
+
+ cli();
+ ps2esdi_valid[target] = (access_count[target] != 1);
+ sti();
+ if (ps2esdi_valid[target])
+ return (-EBUSY);
+
+ for (partition = ps2esdi_gendisk.max_p - 1;
+ partition >= 0; partition--) {
+ sync_dev(MAJOR_NR << 8 | start | partition);
+ invalidate_inodes(MAJOR_NR << 8 | start | partition);
+ invalidate_buffers(MAJOR_NR << 8 | start | partition);
+ ps2esdi_gendisk.part[start + partition].start_sect = 0;
+ ps2esdi_gendisk.part[start + partition].nr_sects = 0;
+ };
+
+ ps2esdi_gendisk.part[start].nr_sects = ps2esdi_info[target].head *
+ ps2esdi_info[target].cyl * ps2esdi_info[target].sect;
+ resetup_one_dev(&ps2esdi_gendisk, target);
+
+ ps2esdi_valid[target] = 1;
+ wake_up(&ps2esdi_wait_open);
+
+ return (0);
+}
+
+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);
+}
+
+#endif
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov