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![Jens Axboe](/assets/img/avatar_default.png)
Some of the code has been gradually transitioned to using the proper struct request_queue, but there's lots left. So do a full sweet of the kernel and get rid of this typedef and replace its uses with the proper type. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
1079 lines
30 KiB
C
1079 lines
30 KiB
C
/* ps2esdi driver based on assembler code by Arindam Banerji,
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written by Peter De Schrijver */
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/* Reassuring note to IBM : This driver was NOT developed by vice-versa
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engineering the PS/2's BIOS */
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/* Dedicated to Wannes, Tofke, Ykke, Godot, Killroy and all those
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other lovely fish out there... */
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/* This code was written during the long and boring WINA
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elections 1994 */
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/* Thanks to Arindam Banerij for giving me the source of his driver */
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/* This code may be freely distributed and modified in any way,
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as long as these notes remain intact */
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/* Revised: 05/07/94 by Arindam Banerji (axb@cse.nd.edu) */
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/* Revised: 09/08/94 by Peter De Schrijver (stud11@cc4.kuleuven.ac.be)
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Thanks to Arindam Banerij for sending me the docs of the adapter */
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/* BA Modified for ThinkPad 720 by Boris Ashkinazi */
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/* (bash@vnet.ibm.com) 08/08/95 */
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/* Modified further for ThinkPad-720C by Uri Blumenthal */
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/* (uri@watson.ibm.com) Sep 11, 1995 */
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/* TODO :
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+ Timeouts
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+ Get disk parameters
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+ DMA above 16MB
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+ reset after read/write error
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*/
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#define DEVICE_NAME "PS/2 ESDI"
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#include <linux/major.h>
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#include <linux/errno.h>
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#include <linux/wait.h>
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#include <linux/interrupt.h>
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#include <linux/fs.h>
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#include <linux/kernel.h>
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#include <linux/genhd.h>
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#include <linux/ps2esdi.h>
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#include <linux/blkdev.h>
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#include <linux/mca-legacy.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
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#include <linux/module.h>
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#include <linux/hdreg.h>
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#include <asm/system.h>
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#include <asm/io.h>
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#include <asm/dma.h>
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#include <asm/mca_dma.h>
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#include <asm/uaccess.h>
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#define PS2ESDI_IRQ 14
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#define MAX_HD 2
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#define MAX_RETRIES 5
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#define MAX_16BIT 65536
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#define ESDI_TIMEOUT 0xf000
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#define ESDI_STAT_TIMEOUT 4
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#define TYPE_0_CMD_BLK_LENGTH 2
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#define TYPE_1_CMD_BLK_LENGTH 4
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static void reset_ctrl(void);
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static int ps2esdi_geninit(void);
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static void do_ps2esdi_request(struct request_queue * q);
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static void ps2esdi_readwrite(int cmd, struct request *req);
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static void ps2esdi_fill_cmd_block(u_short * cmd_blk, u_short cmd,
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u_short cyl, u_short head, u_short sector, u_short length, u_char drive);
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static int ps2esdi_out_cmd_blk(u_short * cmd_blk);
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static void ps2esdi_prep_dma(char *buffer, u_short length, u_char dma_xmode);
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static irqreturn_t ps2esdi_interrupt_handler(int irq, void *dev_id);
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static void (*current_int_handler) (u_int) = NULL;
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static void ps2esdi_normal_interrupt_handler(u_int);
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static void ps2esdi_initial_reset_int_handler(u_int);
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static void ps2esdi_geometry_int_handler(u_int);
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static int ps2esdi_getgeo(struct block_device *bdev, struct hd_geometry *geo);
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static int ps2esdi_read_status_words(int num_words, int max_words, u_short * buffer);
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static void dump_cmd_complete_status(u_int int_ret_code);
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static void ps2esdi_get_device_cfg(void);
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static void ps2esdi_reset_timer(unsigned long unused);
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static u_int dma_arb_level; /* DMA arbitration level */
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static DECLARE_WAIT_QUEUE_HEAD(ps2esdi_int);
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static int no_int_yet;
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static int ps2esdi_drives;
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static u_short io_base;
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static DEFINE_TIMER(esdi_timer, ps2esdi_reset_timer, 0, 0);
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static int reset_status;
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static int ps2esdi_slot = -1;
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static int tp720esdi = 0; /* Is it Integrated ESDI of ThinkPad-720? */
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static int intg_esdi = 0; /* If integrated adapter */
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struct ps2esdi_i_struct {
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unsigned int head, sect, cyl, wpcom, lzone, ctl;
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};
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static DEFINE_SPINLOCK(ps2esdi_lock);
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static struct request_queue *ps2esdi_queue;
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static struct request *current_req;
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#if 0
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#if 0 /* try both - I don't know which one is better... UB */
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static struct ps2esdi_i_struct ps2esdi_info[MAX_HD] =
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{
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{4, 48, 1553, 0, 0, 0},
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{0, 0, 0, 0, 0, 0}};
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#else
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static struct ps2esdi_i_struct ps2esdi_info[MAX_HD] =
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{
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{64, 32, 161, 0, 0, 0},
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{0, 0, 0, 0, 0, 0}};
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#endif
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#endif
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static struct ps2esdi_i_struct ps2esdi_info[MAX_HD] =
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{
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{0, 0, 0, 0, 0, 0},
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{0, 0, 0, 0, 0, 0}};
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static struct block_device_operations ps2esdi_fops =
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{
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.owner = THIS_MODULE,
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.getgeo = ps2esdi_getgeo,
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};
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static struct gendisk *ps2esdi_gendisk[2];
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/* initialization routine called by ll_rw_blk.c */
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static int __init ps2esdi_init(void)
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{
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int error = 0;
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/* register the device - pass the name and major number */
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if (register_blkdev(PS2ESDI_MAJOR, "ed"))
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return -EBUSY;
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/* set up some global information - indicating device specific info */
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ps2esdi_queue = blk_init_queue(do_ps2esdi_request, &ps2esdi_lock);
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if (!ps2esdi_queue) {
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unregister_blkdev(PS2ESDI_MAJOR, "ed");
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return -ENOMEM;
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}
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/* some minor housekeeping - setup the global gendisk structure */
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error = ps2esdi_geninit();
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if (error) {
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printk(KERN_WARNING "PS2ESDI: error initialising"
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" device, releasing resources\n");
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unregister_blkdev(PS2ESDI_MAJOR, "ed");
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blk_cleanup_queue(ps2esdi_queue);
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return error;
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}
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return 0;
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} /* ps2esdi_init */
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#ifndef MODULE
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module_init(ps2esdi_init);
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#else
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static int cyl[MAX_HD] = {-1,-1};
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static int head[MAX_HD] = {-1, -1};
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static int sect[MAX_HD] = {-1, -1};
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module_param(tp720esdi, bool, 0);
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module_param_array(cyl, int, NULL, 0);
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module_param_array(head, int, NULL, 0);
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module_param_array(sect, int, NULL, 0);
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MODULE_LICENSE("GPL");
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int init_module(void) {
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int drive;
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for(drive = 0; drive < MAX_HD; drive++) {
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struct ps2esdi_i_struct *info = &ps2esdi_info[drive];
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if (cyl[drive] != -1) {
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info->cyl = info->lzone = cyl[drive];
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info->wpcom = 0;
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}
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if (head[drive] != -1) {
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info->head = head[drive];
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info->ctl = (head[drive] > 8 ? 8 : 0);
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}
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if (sect[drive] != -1) info->sect = sect[drive];
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}
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return ps2esdi_init();
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}
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void
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cleanup_module(void) {
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int i;
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if(ps2esdi_slot) {
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mca_mark_as_unused(ps2esdi_slot);
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mca_set_adapter_procfn(ps2esdi_slot, NULL, NULL);
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}
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release_region(io_base, 4);
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free_dma(dma_arb_level);
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free_irq(PS2ESDI_IRQ, &ps2esdi_gendisk);
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unregister_blkdev(PS2ESDI_MAJOR, "ed");
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blk_cleanup_queue(ps2esdi_queue);
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for (i = 0; i < ps2esdi_drives; i++) {
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del_gendisk(ps2esdi_gendisk[i]);
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put_disk(ps2esdi_gendisk[i]);
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}
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}
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#endif /* MODULE */
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/* handles boot time command line parameters */
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void __init tp720_setup(char *str, int *ints)
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{
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/* no params, just sets the tp720esdi flag if it exists */
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printk("%s: TP 720 ESDI flag set\n", DEVICE_NAME);
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tp720esdi = 1;
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}
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void __init ed_setup(char *str, int *ints)
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{
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int hdind = 0;
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/* handles 3 parameters only - corresponding to
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1. Number of cylinders
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2. Number of heads
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3. Sectors/track
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*/
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if (ints[0] != 3)
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return;
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/* print out the information - seen at boot time */
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printk("%s: ints[0]=%d ints[1]=%d ints[2]=%d ints[3]=%d\n",
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DEVICE_NAME, ints[0], ints[1], ints[2], ints[3]);
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/* set the index into device specific information table */
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if (ps2esdi_info[0].head != 0)
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hdind = 1;
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/* set up all the device information */
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ps2esdi_info[hdind].head = ints[2];
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ps2esdi_info[hdind].sect = ints[3];
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ps2esdi_info[hdind].cyl = ints[1];
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ps2esdi_info[hdind].wpcom = 0;
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ps2esdi_info[hdind].lzone = ints[1];
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ps2esdi_info[hdind].ctl = (ints[2] > 8 ? 8 : 0);
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#if 0 /* this may be needed for PS2/Mod.80, but it hurts ThinkPad! */
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ps2esdi_drives = hdind + 1; /* increment index for the next time */
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#endif
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} /* ed_setup */
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static int ps2esdi_getinfo(char *buf, int slot, void *d)
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{
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int len = 0;
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len += sprintf(buf + len, "DMA Arbitration Level: %d\n",
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dma_arb_level);
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len += sprintf(buf + len, "IO Port: %x\n", io_base);
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len += sprintf(buf + len, "IRQ: 14\n");
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len += sprintf(buf + len, "Drives: %d\n", ps2esdi_drives);
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return len;
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}
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/* ps2 esdi specific initialization - called thru the gendisk chain */
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static int __init ps2esdi_geninit(void)
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{
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/*
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The first part contains the initialization code
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for the ESDI disk subsystem. All we really do
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is search for the POS registers of the controller
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to do some simple setup operations. First, we
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must ensure that the controller is installed,
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enabled, and configured as PRIMARY. Then we must
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determine the DMA arbitration level being used by
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the controller so we can handle data transfer
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operations properly. If all of this works, then
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we will set the INIT_FLAG to a non-zero value.
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*/
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int slot = 0, i, reset_start, reset_end;
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u_char status;
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unsigned short adapterID;
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int error = 0;
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if ((slot = mca_find_adapter(INTG_ESDI_ID, 0)) != MCA_NOTFOUND) {
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adapterID = INTG_ESDI_ID;
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printk("%s: integrated ESDI adapter found in slot %d\n",
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DEVICE_NAME, slot+1);
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#ifndef MODULE
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mca_set_adapter_name(slot, "PS/2 Integrated ESDI");
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#endif
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} else if ((slot = mca_find_adapter(NRML_ESDI_ID, 0)) != -1) {
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adapterID = NRML_ESDI_ID;
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printk("%s: normal ESDI adapter found in slot %d\n",
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DEVICE_NAME, slot+1);
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mca_set_adapter_name(slot, "PS/2 ESDI");
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} else {
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return -ENODEV;
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}
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ps2esdi_slot = slot;
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mca_mark_as_used(slot);
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mca_set_adapter_procfn(slot, (MCA_ProcFn) ps2esdi_getinfo, NULL);
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/* Found the slot - read the POS register 2 to get the necessary
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configuration and status information. POS register 2 has the
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following information :
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Bit Function
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7 reserved = 0
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6 arbitration method
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0 - fairness enabled
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1 - fairness disabled, linear priority assignment
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5-2 arbitration level
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1 alternate address
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1 alternate address
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0 - use addresses 0x3510 - 0x3517
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0 adapter enable
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*/
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status = mca_read_stored_pos(slot, 2);
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/* is it enabled ? */
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if (!(status & STATUS_ENABLED)) {
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printk("%s: ESDI adapter disabled\n", DEVICE_NAME);
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error = -ENODEV;
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goto err_out1;
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}
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/* try to grab IRQ, and try to grab a slow IRQ if it fails, so we can
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share with the SCSI driver */
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if (request_irq(PS2ESDI_IRQ, ps2esdi_interrupt_handler,
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IRQF_DISABLED | IRQF_SHARED, "PS/2 ESDI", &ps2esdi_gendisk)
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&& request_irq(PS2ESDI_IRQ, ps2esdi_interrupt_handler,
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IRQF_SHARED, "PS/2 ESDI", &ps2esdi_gendisk)
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) {
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printk("%s: Unable to get IRQ %d\n", DEVICE_NAME, PS2ESDI_IRQ);
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error = -EBUSY;
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goto err_out1;
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}
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if (status & STATUS_ALTERNATE)
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io_base = ALT_IO_BASE;
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else
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io_base = PRIMARY_IO_BASE;
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if (!request_region(io_base, 4, "ed")) {
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printk(KERN_WARNING"Unable to request region 0x%x\n", io_base);
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error = -EBUSY;
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goto err_out2;
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}
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/* get the dma arbitration level */
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dma_arb_level = (status >> 2) & 0xf;
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/* BA */
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printk("%s: DMA arbitration level : %d\n",
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DEVICE_NAME, dma_arb_level);
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LITE_ON;
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current_int_handler = ps2esdi_initial_reset_int_handler;
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reset_ctrl();
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reset_status = 0;
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reset_start = jiffies;
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while (!reset_status) {
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init_timer(&esdi_timer);
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esdi_timer.expires = jiffies + HZ;
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esdi_timer.data = 0;
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add_timer(&esdi_timer);
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sleep_on(&ps2esdi_int);
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}
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reset_end = jiffies;
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LITE_OFF;
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printk("%s: reset interrupt after %d jiffies, %u.%02u secs\n",
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DEVICE_NAME, reset_end - reset_start, (reset_end - reset_start) / HZ,
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(reset_end - reset_start) % HZ);
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|
|
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/* Integrated ESDI Disk and Controller has only one drive! */
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if (adapterID == INTG_ESDI_ID) {/* if not "normal" PS2 ESDI adapter */
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ps2esdi_drives = 1; /* then we have only one physical disk! */ intg_esdi = 1;
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}
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|
|
|
|
|
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/* finally this part sets up some global data structures etc. */
|
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|
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ps2esdi_get_device_cfg();
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|
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/* some annoyance in the above routine returns TWO drives?
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Is something else happining in the background?
|
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Regaurdless we fix the # of drives again. AJK */
|
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/* Integrated ESDI Disk and Controller has only one drive! */
|
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if (adapterID == INTG_ESDI_ID) /* if not "normal" PS2 ESDI adapter */
|
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ps2esdi_drives = 1; /* Not three or two, ONE DAMNIT! */
|
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|
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current_int_handler = ps2esdi_normal_interrupt_handler;
|
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|
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if (request_dma(dma_arb_level, "ed") !=0) {
|
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printk(KERN_WARNING "PS2ESDI: Can't request dma-channel %d\n"
|
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,(int) dma_arb_level);
|
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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;
|
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sprintf(disk->disk_name, "ed%c", 'a'+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(struct request_queue * 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)
|
|
{
|
|
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_getgeo(struct block_device *bdev, struct hd_geometry *geo)
|
|
{
|
|
struct ps2esdi_i_struct *p = bdev->bd_disk->private_data;
|
|
|
|
geo->heads = p->head;
|
|
geo->sectors = p->sect;
|
|
geo->cylinders = p->cyl;
|
|
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);
|
|
}
|