ps2esdi.c
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上传用户:ajay2009
上传日期:2009-05-22
资源大小:495k
文件大小:30k
源码类别:
驱动编程
开发平台:
Unix_Linux
- /* 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 DEFINE_TIMER(esdi_timer, 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 resourcesn");
- 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 setn", 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]=%dn",
- 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: %dn",
- dma_arb_level);
- len += sprintf(buf + len, "IO Port: %xn", io_base);
- len += sprintf(buf + len, "IRQ: 14n");
- len += sprintf(buf + len, "Drives: %dn", 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 %dn",
- 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 %dn",
- 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 disabledn", 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 %dn", 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%xn", io_base);
- error = -EBUSY;
- goto err_out2;
- }
- /* get the dma arbitration level */
- dma_arb_level = (status >> 2) & 0xf;
- /* BA */
- printk("%s: DMA arbitration level : %dn",
- 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 secsn",
- 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 %dn"
- ,(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 0n", 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 1n", 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: %pn",
- 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 supportedn", 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 %llun",
- 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 commandn", 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=%dn", 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 failedn", 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 xfern", 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)=%ldn", 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 controllern", 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 %04Xn", 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 : %02Xn", DEVICE_NAME,
- int_ret_code);
- printk("%s: status: %02xn", DEVICE_NAME, inb(ESDI_STATUS));
- break;
- default:
- printk("%s: initial reset handler received interrupt: %02Xn",
- 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 wordn", 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 %un",
- DEVICE_NAME, drive_num);
- printk("%s: Spares/cyls: %u", DEVICE_NAME, reply[0] >> 8);
- printk
- ("Config bits: %s%s%s%s%sn",
- (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: %lun", DEVICE_NAME, rba);
- printk("%s: Physical number of cylinders: %u, Sectors/Track: %u, Heads: %un",
- 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 confign", DEVICE_NAME);
- #undef REPLY_WORDS
- } else
- printk("%s: command %02X unknown by geometry handlern",
- DEVICE_NAME, status & 0x1f);
- outb((int_ret_code & 0xe0) | ATT_EOI, ESDI_ATTN);
- break;
- case INT_ATTN_ERROR:
- printk("%s: Attention error. interrupt status : %02Xn", DEVICE_NAME,
- int_ret_code);
- printk("%s: Device not availablen", 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: %02Xn",
- 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 : %02Xn", 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 wordn", 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 %02Xn",
- 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: %02Xn",
- 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 wordn", 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 wordn",DEVICE_NAME);
- return;
- }
- int i, word_count;
- u_short stat_word;
- u_long rba;
- printk("%s: Device: %u, interrupt ID: %02Xn",
- 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: %02Xn", 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: %02Xn",
- 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,%02Xn", 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: %un",
- (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);
- }