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