patch-2.1.63 linux/drivers/scsi/pci2000.c
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- Lines: 661
- Date:
Wed Nov 5 12:59:49 1997
- Orig file:
v2.1.62/linux/drivers/scsi/pci2000.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.1.62/linux/drivers/scsi/pci2000.c linux/drivers/scsi/pci2000.c
@@ -0,0 +1,660 @@
+/*+M*************************************************************************
+ * Perceptive Solutions, Inc. PCI-2000 device driver proc support for Linux.
+ *
+ * Copyright (c) 1997 Perceptive Solutions, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *
+ * File Name: pci2000i.c
+ *
+ *-M*************************************************************************/
+
+#include <linux/module.h>
+
+#include <linux/kernel.h>
+#include <linux/head.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/bios32.h>
+#include <linux/pci.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/sched.h>
+#include <linux/proc_fs.h>
+#include <asm/dma.h>
+#include <asm/system.h>
+#include <asm/io.h>
+#include <linux/blk.h>
+#include "scsi.h"
+#include "hosts.h"
+
+#include "pci2000.h"
+#include "psi_roy.h"
+
+#include<linux/stat.h>
+
+struct proc_dir_entry Proc_Scsi_Pci2000 =
+ { PROC_SCSI_PCI2000, 7, "pci2000", S_IFDIR | S_IRUGO | S_IXUGO, 2 };
+
+//#define DEBUG 1
+
+#ifdef DEBUG
+#define DEB(x) x
+#define STOP_HERE {int st;for(st=0;st<100;st++){st=1;}}
+#else
+#define DEB(x)
+#define STOP_HERE
+#endif
+
+typedef struct
+ {
+ ULONG address;
+ ULONG length;
+ } SCATGATH, *PSCATGATH;
+
+typedef struct
+ {
+ Scsi_Cmnd *SCpnt;
+ SCATGATH scatGath[16];
+ UCHAR tag;
+ } DEV2000, *PDEV2000;
+
+typedef struct
+ {
+ USHORT basePort;
+ USHORT mb0;
+ USHORT mb1;
+ USHORT mb2;
+ USHORT mb3;
+ USHORT mb4;
+ USHORT cmd;
+ USHORT tag;
+ DEV2000 dev[MAX_BUS][MAX_UNITS];
+ } ADAPTER2000, *PADAPTER2000;
+
+#define HOSTDATA(host) ((PADAPTER2000)&host->hostdata)
+
+
+static struct Scsi_Host *PsiHost[MAXADAPTER] = {NULL,}; // One for each adapter
+static int NumAdapters = 0;
+
+/****************************************************************
+ * Name: WaitReady :LOCAL
+ *
+ * Description: Wait for controller ready.
+ *
+ * Parameters: padapter - Pointer adapter data structure.
+ *
+ * Returns: TRUE on not ready.
+ *
+ ****************************************************************/
+static int WaitReady (PADAPTER2000 padapter)
+ {
+ ULONG timer;
+
+ timer = jiffies + TIMEOUT_COMMAND; // calculate the timeout value
+ do {
+ if ( !inb_p (padapter->cmd) )
+ return FALSE;
+ } while ( timer > jiffies ); // test for timeout
+ return TRUE;
+ }
+/****************************************************************
+ * Name: OpDone :LOCAL
+ *
+ * Description: Clean up operation and issue done to caller.
+ *
+ * Parameters: SCpnt - Pointer to SCSI command structure.
+ * status - Caller status.
+ *
+ * Returns: Nothing.
+ *
+ ****************************************************************/
+static void OpDone (Scsi_Cmnd *SCpnt, ULONG status)
+ {
+ SCpnt->result = status;
+ SCpnt->scsi_done (SCpnt);
+ }
+/****************************************************************
+ * Name: Command :LOCAL
+ *
+ * Description: Issue queued command to the PCI-2000.
+ *
+ * Parameters: padapter - Pointer to adapter information structure.
+ * cmd - PCI-2000 command byte.
+ *
+ * Returns: Non-zero command tag if operation is accepted.
+ *
+ ****************************************************************/
+static UCHAR Command (PADAPTER2000 padapter, UCHAR cmd)
+ {
+ outb_p (cmd, padapter->cmd);
+ if ( WaitReady (padapter) )
+ return 0;
+
+ if ( inw_p (padapter->mb0) )
+ return 0;
+
+ return inb_p (padapter->mb1);
+ }
+/****************************************************************
+ * Name: BuildSgList :LOCAL
+ *
+ * Description: Build the scatter gather list for controller.
+ *
+ * Parameters: SCpnt - Pointer to SCSI command structure.
+ * padapter - Pointer to adapter information structure.
+ * pdev - Pointer to adapter device structure.
+ *
+ * Returns: Non-zero in not scatter gather.
+ *
+ ****************************************************************/
+static int BuildSgList (Scsi_Cmnd *SCpnt, PADAPTER2000 padapter, PDEV2000 pdev)
+ {
+ int z;
+
+ if ( SCpnt->use_sg )
+ {
+ for ( z = 0; z < SCpnt->use_sg; z++ )
+ {
+ pdev->scatGath[z].address = virt_to_bus (((struct scatterlist *)SCpnt->request_buffer)[z].address);
+ pdev->scatGath[z].length = ((struct scatterlist *)SCpnt->request_buffer)[z].length;
+ }
+ outl (virt_to_bus (pdev->scatGath), padapter->mb2);
+ outl ((SCpnt->use_sg << 24) | SCpnt->request_bufflen, padapter->mb3);
+ return FALSE;
+ }
+ outl (virt_to_bus (SCpnt->request_buffer), padapter->mb2);
+ outl (SCpnt->request_bufflen, padapter->mb3);
+ return TRUE;
+ }
+/****************************************************************
+ * Name: Irq_Handler :LOCAL
+ *
+ * Description: Interrupt handler.
+ *
+ * Parameters: irq - Hardware IRQ number.
+ * dev_id -
+ * regs -
+ *
+ * Returns: TRUE if drive is not ready in time.
+ *
+ ****************************************************************/
+static void Irq_Handler (int irq, void *dev_id, struct pt_regs *regs)
+ {
+ struct Scsi_Host *shost = NULL; // Pointer to host data block
+ PADAPTER2000 padapter; // Pointer to adapter control structure
+ PDEV2000 pdev;
+ Scsi_Cmnd *SCpnt;
+ UCHAR tag = 0;
+ UCHAR tag0;
+ ULONG error;
+ int pun;
+ int bus;
+ int z;
+
+ DEB(printk ("\npci2000 recieved interrupt "));
+ for ( z = 0; z < NumAdapters; z++ ) // scan for interrupt to process
+ {
+ if ( PsiHost[z]->irq == (UCHAR)(irq & 0xFF) )
+ {
+ tag = inb_p (HOSTDATA(PsiHost[z])->tag);
+ if ( tag )
+ {
+ shost = PsiHost[z];
+ break;
+ }
+ }
+ }
+
+ if ( !shost )
+ {
+ DEB (printk ("\npci2000: not my interrupt"));
+ return;
+ }
+
+ padapter = HOSTDATA(shost);
+
+ tag0 = tag & 0x7F; // mask off the error bit
+ for ( bus = 0; bus < MAX_BUS; bus++ ) // scan the busses
+ {
+ for ( pun = 0; pun < MAX_UNITS; pun++ ) // scan the targets
+ {
+ pdev = &padapter->dev[bus][pun];
+ if ( !pdev->tag )
+ continue;
+ if ( pdev->tag == tag0 ) // is this it?
+ {
+ pdev->tag = 0;
+ SCpnt = pdev->SCpnt;
+ goto irqProceed;
+ }
+ }
+ }
+
+ outb_p (0xFF, padapter->tag); // clear the op interrupt
+ outb_p (CMD_DONE, padapter->cmd); // complete the op
+ return; // done, but, with what?
+
+irqProceed:;
+ if ( tag & ERR08_TAGGED ) // is there an error here?
+ {
+ if ( WaitReady (padapter) )
+ {
+ OpDone (SCpnt, DID_TIME_OUT << 16);
+ return;
+ }
+
+ outb_p (tag0, padapter->mb0); // get real error code
+ outb_p (CMD_ERROR, padapter->cmd);
+ if ( WaitReady (padapter) ) // wait for controller to suck up the op
+ {
+ OpDone (SCpnt, DID_TIME_OUT << 16);
+ return;
+ }
+
+ error = inl (padapter->mb0); // get error data
+ outb_p (0xFF, padapter->tag); // clear the op interrupt
+ outb_p (CMD_DONE, padapter->cmd); // complete the op
+
+ DEB (printk ("status: %lX ", error));
+ if ( error == 0x00020002 ) // is this error a check condition?
+ {
+ if ( bus ) // are we doint SCSI commands?
+ {
+ OpDone (SCpnt, (DID_OK << 16) | 2);
+ return;
+ }
+ if ( *SCpnt->cmnd == SCSIOP_TEST_UNIT_READY )
+ OpDone (SCpnt, (DRIVER_SENSE << 24) | (DID_OK << 16) | 2); // test caller we have sense data too
+ else
+ OpDone (SCpnt, DID_ERROR << 16);
+ return;
+ }
+ OpDone (SCpnt, DID_ERROR << 16);
+ return;
+ }
+
+ outb_p (0xFF, padapter->tag); // clear the op interrupt
+ outb_p (CMD_DONE, padapter->cmd); // complete the op
+ OpDone (SCpnt, DID_OK << 16);
+ }
+/****************************************************************
+ * Name: Pci2220i_QueueCommand
+ *
+ * Description: Process a queued command from the SCSI manager.
+ *
+ * Parameters: SCpnt - Pointer to SCSI command structure.
+ * done - Pointer to done function to call.
+ *
+ * Returns: Status code.
+ *
+ ****************************************************************/
+int Pci2000_QueueCommand (Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
+ {
+ UCHAR *cdb = (UCHAR *)SCpnt->cmnd; // Pointer to SCSI CDB
+ PADAPTER2000 padapter = HOSTDATA(SCpnt->host); // Pointer to adapter control structure
+ int rc = -1; // command return code
+ UCHAR bus = SCpnt->channel;
+ UCHAR pun = SCpnt->target;
+ UCHAR lun = SCpnt->lun;
+ UCHAR cmd;
+ PDEV2000 pdev = &padapter->dev[bus][pun];
+
+ if ( !done )
+ {
+ printk("pci2000_queuecommand: %02X: done can't be NULL\n", *cdb);
+ return 0;
+ }
+
+ SCpnt->scsi_done = done;
+ pdev->SCpnt = SCpnt; // Save this command data
+
+ if ( WaitReady (padapter) )
+ {
+ rc = DID_ERROR;
+ goto finished;
+ }
+
+ outw_p (pun | (lun << 8), padapter->mb0);
+
+ if ( bus )
+ {
+ DEB (if(*cdb) printk ("\nCDB: %X- %X %X %X %X %X %X %X %X %X %X ", SCpnt->cmd_len, cdb[0], cdb[1], cdb[2], cdb[3], cdb[4], cdb[5], cdb[6], cdb[7], cdb[8], cdb[9]));
+ DEB (if(*cdb) printk ("\ntimeout_per_command: %d, timeout_total: %d, timeout: %d, internal_timout: %d", SCpnt->timeout_per_command,
+ SCpnt->timeout_total, SCpnt->timeout, SCpnt->internal_timeout));
+ outl (SCpnt->timeout_per_command, padapter->mb1);
+ outb_p (CMD_SCSI_TIMEOUT, padapter->cmd);
+ if ( WaitReady (padapter) )
+ {
+ rc = DID_ERROR;
+ goto finished;
+ }
+
+ outw_p (pun | (lun << 8), padapter->mb0);
+ outw_p (SCpnt->cmd_len << 8, padapter->mb0 + 2);
+ outl (virt_to_bus (cdb), padapter->mb1);
+ if ( BuildSgList (SCpnt, padapter, pdev) )
+ cmd = CMD_SCSI_THRU;
+ else
+ cmd = CMD_SCSI_THRU_SG;
+ if ( (pdev->tag = Command (padapter, cmd)) == 0 )
+ rc = DID_TIME_OUT;
+ goto finished;
+ }
+ else
+ {
+ if ( lun )
+ {
+ rc = DID_BAD_TARGET;
+ goto finished;
+ }
+ }
+
+ switch ( *cdb )
+ {
+ case SCSIOP_INQUIRY: // inquiry CDB
+ {
+ if ( SCpnt->use_sg )
+ {
+ outl (virt_to_bus (((struct scatterlist *)(SCpnt->request_buffer))->address), padapter->mb2);
+ }
+ else
+ {
+ outl (virt_to_bus (SCpnt->request_buffer), padapter->mb2);
+ }
+ outl (SCpnt->request_bufflen, padapter->mb3);
+ cmd = CMD_DASD_SCSI_INQ;
+ break;
+ }
+
+ case SCSIOP_TEST_UNIT_READY: // test unit ready CDB
+ outl (virt_to_bus (SCpnt->sense_buffer), padapter->mb2);
+ outl (sizeof (SCpnt->sense_buffer), padapter->mb3);
+ cmd = CMD_TEST_READY;
+ break;
+
+ case SCSIOP_READ_CAPACITY: // read capctiy CDB
+ if ( SCpnt->use_sg )
+ {
+ outl (virt_to_bus (((struct scatterlist *)(SCpnt->request_buffer))->address), padapter->mb2);
+ }
+ else
+ {
+ outl (virt_to_bus (SCpnt->request_buffer), padapter->mb2);
+ }
+ outl (8, padapter->mb3);
+ cmd = CMD_DASD_CAP;
+ break;
+ case SCSIOP_VERIFY: // verify CDB
+ outw_p ((USHORT)cdb[8] | ((USHORT)cdb[7] << 8), padapter->mb0 + 2);
+ outl (XSCSI2LONG (&cdb[2]), padapter->mb1);
+ cmd = CMD_READ_SG;
+ break;
+ case SCSIOP_READ: // read10 CDB
+ outw_p ((USHORT)cdb[8] | ((USHORT)cdb[7] << 8), padapter->mb0 + 2);
+ outl (XSCSI2LONG (&cdb[2]), padapter->mb1);
+ if ( BuildSgList (SCpnt, padapter, pdev) )
+ cmd = CMD_READ;
+ else
+ cmd = CMD_READ_SG;
+ break;
+ case SCSIOP_READ6: // read6 CDB
+ outw_p (cdb[4], padapter->mb0 + 2);
+ outl ((SCSI2LONG (&cdb[1])) & 0x001FFFFF, padapter->mb1);
+ if ( BuildSgList (SCpnt, padapter, pdev) )
+ cmd = CMD_READ;
+ else
+ cmd = CMD_READ_SG;
+ break;
+ case SCSIOP_WRITE: // write10 CDB
+ outw_p ((USHORT)cdb[8] | ((USHORT)cdb[7] << 8), padapter->mb0 + 2);
+ outl (XSCSI2LONG (&cdb[2]), padapter->mb1);
+ if ( BuildSgList (SCpnt, padapter, pdev) )
+ cmd = CMD_WRITE;
+ else
+ cmd = CMD_WRITE_SG;
+ break;
+ case SCSIOP_WRITE6: // write6 CDB
+ outw_p (cdb[4], padapter->mb0 + 2);
+ outl ((SCSI2LONG (&cdb[1])) & 0x001FFFFF, padapter->mb1);
+ if ( BuildSgList (SCpnt, padapter, pdev) )
+ cmd = CMD_WRITE;
+ else
+ cmd = CMD_WRITE_SG;
+ break;
+ case SCSIOP_START_STOP_UNIT:
+ cmd = CMD_EJECT_MEDIA;
+ break;
+ case SCSIOP_MEDIUM_REMOVAL:
+ switch ( cdb[4] )
+ {
+ case 0:
+ cmd = CMD_UNLOCK_DOOR;
+ break;
+ case 1:
+ cmd = CMD_LOCK_DOOR;
+ break;
+ default:
+ cmd = 0;
+ break;
+ }
+ if ( cmd )
+ break;
+ default:
+ DEB (printk ("pci2220i_queuecommand: Unsupported command %02X\n", *cdb));
+ OpDone (SCpnt, DID_ERROR << 16);
+ return 0;
+ }
+
+ if ( (pdev->tag = Command (padapter, cmd)) == 0 )
+ rc = DID_TIME_OUT;
+finished:;
+ if ( rc != -1 )
+ OpDone (SCpnt, rc << 16);
+ return 0;
+ }
+/****************************************************************
+ * Name: internal_done :LOCAL
+ *
+ * Description: Done handler for non-queued commands
+ *
+ * Parameters: SCpnt - Pointer to SCSI command structure.
+ *
+ * Returns: Nothing.
+ *
+ ****************************************************************/
+static void internal_done (Scsi_Cmnd * SCpnt)
+ {
+ SCpnt->SCp.Status++;
+ }
+/****************************************************************
+ * Name: Pci2220i_Command
+ *
+ * Description: Process a command from the SCSI manager.
+ *
+ * Parameters: SCpnt - Pointer to SCSI command structure.
+ *
+ * Returns: Status code.
+ *
+ ****************************************************************/
+int Pci2000_Command (Scsi_Cmnd *SCpnt)
+ {
+ DEB(printk("pci2000_command: ..calling pci2000_queuecommand\n"));
+
+ Pci2000_QueueCommand (SCpnt, internal_done);
+
+ SCpnt->SCp.Status = 0;
+ while (!SCpnt->SCp.Status)
+ barrier ();
+ return SCpnt->result;
+ }
+/****************************************************************
+ * Name: Pci2220i_Detect
+ *
+ * Description: Detect and initialize our boards.
+ *
+ * Parameters: tpnt - Pointer to SCSI host template structure.
+ *
+ * Returns: Number of adapters found.
+ *
+ ****************************************************************/
+int Pci2000_Detect (Scsi_Host_Template *tpnt)
+ {
+ int pci_index = 0;
+ struct Scsi_Host *pshost;
+ PADAPTER2000 padapter;
+ int z;
+ int setirq;
+
+ if ( pcibios_present () )
+ {
+ for ( pci_index = 0; pci_index <= MAXADAPTER; ++pci_index )
+ {
+ UCHAR pci_bus, pci_device_fn;
+
+ if ( pcibios_find_device (VENDOR_PSI, DEVICE_ROY_1, pci_index, &pci_bus, &pci_device_fn) != 0 )
+ break;
+
+ pshost = scsi_register (tpnt, sizeof(ADAPTER2000));
+ padapter = HOSTDATA(pshost);
+
+ pcibios_read_config_word (pci_bus, pci_device_fn, PCI_BASE_ADDRESS_1, &padapter->basePort);
+ padapter->basePort &= 0xFFFE;
+ DEB (printk ("\nBase Regs = %#04X", padapter->basePort)); // get the base I/O port address
+ padapter->mb0 = padapter->basePort + RTR_MAILBOX; // get the 32 bit mail boxes
+ padapter->mb1 = padapter->basePort + RTR_MAILBOX + 4;
+ padapter->mb2 = padapter->basePort + RTR_MAILBOX + 8;
+ padapter->mb3 = padapter->basePort + RTR_MAILBOX + 12;
+ padapter->mb4 = padapter->basePort + RTR_MAILBOX + 16;
+ padapter->cmd = padapter->basePort + RTR_LOCAL_DOORBELL; // command register
+ padapter->tag = padapter->basePort + RTR_PCI_DOORBELL; // tag/response register
+
+ if ( WaitReady (padapter) )
+ goto unregister;
+ outb_p (0x84, padapter->mb0);
+ outb_p (CMD_SPECIFY, padapter->cmd);
+ if ( WaitReady (padapter) )
+ goto unregister;
+
+ pcibios_read_config_byte (pci_bus, pci_device_fn, PCI_INTERRUPT_LINE, &pshost->irq);
+ setirq = 1;
+ for ( z = 0; z < pci_index; z++ ) // scan for shared interrupts
+ {
+ if ( PsiHost[z]->irq == pshost->irq ) // if shared then, don't posses
+ setirq = 0;
+ }
+ if ( setirq ) // if not shared, posses
+ {
+ if ( request_irq (pshost->irq, Irq_Handler, 0, "pci2000", NULL) )
+ {
+ printk ("Unable to allocate IRQ for PSI-2000 controller.\n");
+ goto unregister;
+ }
+ }
+ PsiHost[pci_index] = pshost; // save SCSI_HOST pointer
+
+ pshost->unique_id = padapter->basePort;
+ pshost->max_id = 16;
+ pshost->max_channel = 1;
+
+ printk("\nPSI-2000 EIDE CONTROLLER: at I/O = %X IRQ = %d\n", padapter->basePort, pshost->irq);
+ printk("(C) 1997 Perceptive Solutions, Inc. All rights reserved\n\n");
+ continue;
+unregister:;
+ scsi_unregister (pshost);
+ }
+ }
+ NumAdapters = pci_index;
+ return pci_index;
+ }
+/****************************************************************
+ * Name: Pci2220i_Abort
+ *
+ * Description: Process the Abort command from the SCSI manager.
+ *
+ * Parameters: SCpnt - Pointer to SCSI command structure.
+ *
+ * Returns: Allways snooze.
+ *
+ ****************************************************************/
+int Pci2000_Abort (Scsi_Cmnd *SCpnt)
+ {
+ DEB (printk ("pci2000_abort\n"));
+ return SCSI_ABORT_SNOOZE;
+ }
+/****************************************************************
+ * Name: Pci2220i_Reset
+ *
+ * Description: Process the Reset command from the SCSI manager.
+ *
+ * Parameters: SCpnt - Pointer to SCSI command structure.
+ * flags - Flags about the reset command
+ *
+ * Returns: No active command at this time, so this means
+ * that each time we got some kind of response the
+ * last time through. Tell the mid-level code to
+ * request sense information in order to decide what
+ * to do next.
+ *
+ ****************************************************************/
+int Pci2000_Reset (Scsi_Cmnd *SCpnt, unsigned int reset_flags)
+ {
+ return SCSI_RESET_PUNT;
+ }
+
+#include "sd.h"
+
+/****************************************************************
+ * Name: Pci2220i_BiosParam
+ *
+ * Description: Process the biosparam request from the SCSI manager to
+ * return C/H/S data.
+ *
+ * Parameters: disk - Pointer to SCSI disk structure.
+ * dev - Major/minor number from kernel.
+ * geom - Pointer to integer array to place geometry data.
+ *
+ * Returns: zero.
+ *
+ ****************************************************************/
+int Pci2000_BiosParam (Scsi_Disk *disk, kdev_t dev, int geom[])
+ {
+ PADAPTER2000 padapter;
+
+ padapter = HOSTDATA(disk->device->host);
+
+ if ( WaitReady (padapter) )
+ return 0;
+ outb_p (disk->device->id, padapter->mb0);
+ outb_p (CMD_GET_PARMS, padapter->cmd);
+ if ( WaitReady (padapter) )
+ return 0;
+
+ geom[0] = inb_p (padapter->mb2 + 3);
+ geom[1] = inb_p (padapter->mb2 + 2);
+ geom[2] = inw_p (padapter->mb2);
+ return 0;
+ }
+
+
+#ifdef MODULE
+/* Eventually this will go into an include file, but this will be later */
+Scsi_Host_Template driver_template = PCI2220I;
+
+#include "scsi_module.c"
+#endif
+
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