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-rw-r--r--linux/src/drivers/scsi/pas16.c576
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diff --git a/linux/src/drivers/scsi/pas16.c b/linux/src/drivers/scsi/pas16.c
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+#define AUTOSENSE
+#define PSEUDO_DMA
+#define FOO
+#define UNSAFE /* Not unsafe for PAS16 -- use it */
+
+/*
+ * This driver adapted from Drew Eckhardt's Trantor T128 driver
+ *
+ * Copyright 1993, Drew Eckhardt
+ * Visionary Computing
+ * (Unix and Linux consulting and custom programming)
+ * drew@colorado.edu
+ * +1 (303) 666-5836
+ *
+ * ( Based on T128 - DISTRIBUTION RELEASE 3. )
+ *
+ * Modified to work with the Pro Audio Spectrum/Studio 16
+ * by John Weidman.
+ *
+ *
+ * For more information, please consult
+ *
+ * Media Vision
+ * (510) 770-8600
+ * (800) 348-7116
+ *
+ * and
+ *
+ * NCR 5380 Family
+ * SCSI Protocol Controller
+ * Databook
+ *
+ * NCR Microelectronics
+ * 1635 Aeroplaza Drive
+ * Colorado Springs, CO 80916
+ * 1+ (719) 578-3400
+ * 1+ (800) 334-5454
+ */
+
+/*
+ * Options :
+ * AUTOSENSE - if defined, REQUEST SENSE will be performed automatically
+ * for commands that return with a CHECK CONDITION status.
+ *
+ * LIMIT_TRANSFERSIZE - if defined, limit the pseudo-dma transfers to 512
+ * bytes at a time. Since interrupts are disabled by default during
+ * these transfers, we might need this to give reasonable interrupt
+ * service time if the transfer size gets too large.
+ *
+ * PSEUDO_DMA - enables PSEUDO-DMA hardware, should give a 3-4X performance
+ * increase compared to polled I/O.
+ *
+ * PARITY - enable parity checking. Not supported.
+ *
+ * SCSI2 - enable support for SCSI-II tagged queueing. Untested.
+ *
+ * UNSAFE - leave interrupts enabled during pseudo-DMA transfers. This
+ * parameter comes from the NCR5380 code. It is NOT unsafe with
+ * the PAS16 and you should use it. If you don't you will have
+ * a problem with dropped characters during high speed
+ * communications during SCSI transfers. If you really don't
+ * want to use UNSAFE you can try defining LIMIT_TRANSFERSIZE or
+ * twiddle with the transfer size in the high level code.
+ *
+ * USLEEP - enable support for devices that don't disconnect. Untested.
+ *
+ * The card is detected and initialized in one of several ways :
+ * 1. Autoprobe (default) - There are many different models of
+ * the Pro Audio Spectrum/Studio 16, and I only have one of
+ * them, so this may require a little tweaking. An interrupt
+ * is triggered to autoprobe for the interrupt line. Note:
+ * with the newer model boards, the interrupt is set via
+ * software after reset using the default_irq for the
+ * current board number.
+ *
+ *
+ * 2. With command line overrides - pas16=port,irq may be
+ * used on the LILO command line to override the defaults.
+ *
+ * 3. With the PAS16_OVERRIDE compile time define. This is
+ * specified as an array of address, irq tuples. Ie, for
+ * one board at the default 0x388 address, IRQ10, I could say
+ * -DPAS16_OVERRIDE={{0x388, 10}}
+ * NOTE: Untested.
+ *
+ * Note that if the override methods are used, place holders must
+ * be specified for other boards in the system.
+ *
+ *
+ * Configuration notes :
+ * The current driver does not support interrupt sharing with the
+ * sound portion of the card. If you use the same irq for the
+ * scsi port and sound you will have problems. Either use
+ * a different irq for the scsi port or don't use interrupts
+ * for the scsi port.
+ *
+ * If you have problems with your card not being recognized, use
+ * the LILO command line override. Try to get it recognized without
+ * interrupts. Ie, for a board at the default 0x388 base port,
+ * boot: linux pas16=0x388,255
+ *
+ * (255 is the IRQ_NONE constant in NCR5380.h)
+ */
+
+#ifdef MODULE
+#include <linux/module.h>
+#endif
+
+#include <asm/system.h>
+#include <linux/signal.h>
+#include <linux/proc_fs.h>
+#include <linux/sched.h>
+#include <asm/io.h>
+#include <linux/blk.h>
+#include "scsi.h"
+#include "hosts.h"
+#include "pas16.h"
+#define AUTOPROBE_IRQ
+#include "NCR5380.h"
+#include "constants.h"
+#include "sd.h"
+
+#include<linux/stat.h>
+
+struct proc_dir_entry proc_scsi_pas16 = {
+ PROC_SCSI_PAS16, 5, "pas16",
+ S_IFDIR | S_IRUGO | S_IXUGO, 2
+};
+static int pas_maxi = 0;
+static int pas_wmaxi = 0;
+
+
+int scsi_irq_translate[] =
+ { 0, 0, 1, 2, 3, 4, 5, 6, 0, 0, 7, 8, 9, 0, 10, 11 };
+
+/* The default_irqs array contains values used to set the irq into the
+ * board via software (as must be done on newer model boards without
+ * irq jumpers on the board). The first value in the array will be
+ * assigned to logical board 0, the next to board 1, etc.
+ */
+int default_irqs[] = { PAS16_DEFAULT_BOARD_1_IRQ,
+ PAS16_DEFAULT_BOARD_2_IRQ,
+ PAS16_DEFAULT_BOARD_3_IRQ,
+ PAS16_DEFAULT_BOARD_4_IRQ
+ };
+
+static struct override {
+ unsigned short io_port;
+ int irq;
+} overrides
+#ifdef PAS16_OVERRIDE
+ [] = PAS16_OVERRIDE;
+#else
+ [4] = {{0,IRQ_AUTO}, {0,IRQ_AUTO}, {0,IRQ_AUTO},
+ {0,IRQ_AUTO}};
+#endif
+
+#define NO_OVERRIDES (sizeof(overrides) / sizeof(struct override))
+
+static struct base {
+ unsigned short io_port;
+ int noauto;
+} bases[] = { {PAS16_DEFAULT_BASE_1, 0},
+ {PAS16_DEFAULT_BASE_2, 0},
+ {PAS16_DEFAULT_BASE_3, 0},
+ {PAS16_DEFAULT_BASE_4, 0}
+ };
+
+#define NO_BASES (sizeof (bases) / sizeof (struct base))
+
+unsigned short pas16_offset[ 8 ] =
+ {
+ 0x1c00, /* OUTPUT_DATA_REG */
+ 0x1c01, /* INITIATOR_COMMAND_REG */
+ 0x1c02, /* MODE_REG */
+ 0x1c03, /* TARGET_COMMAND_REG */
+ 0x3c00, /* STATUS_REG ro, SELECT_ENABLE_REG wo */
+ 0x3c01, /* BUS_AND_STATUS_REG ro, START_DMA_SEND_REG wo */
+ 0x3c02, /* INPUT_DATA_REGISTER ro, (N/A on PAS16 ?)
+ * START_DMA_TARGET_RECEIVE_REG wo
+ */
+ 0x3c03, /* RESET_PARITY_INTERRUPT_REG ro,
+ * START_DMA_INITIATOR_RECEIVE_REG wo
+ */
+ };
+/*----------------------------------------------------------------*/
+/* the following will set the monitor border color (useful to find
+ where something crashed or gets stuck at */
+/* 1 = blue
+ 2 = green
+ 3 = cyan
+ 4 = red
+ 5 = magenta
+ 6 = yellow
+ 7 = white
+*/
+#if 1
+#define rtrc(i) {inb(0x3da); outb(0x31, 0x3c0); outb((i), 0x3c0);}
+#else
+#define rtrc(i) {}
+#endif
+
+
+/*
+ * Function : enable_board( int board_num, unsigned short port )
+ *
+ * Purpose : set address in new model board
+ *
+ * Inputs : board_num - logical board number 0-3, port - base address
+ *
+ */
+
+void enable_board( int board_num, unsigned short port )
+{
+ outb( 0xbc + board_num, MASTER_ADDRESS_PTR );
+ outb( port >> 2, MASTER_ADDRESS_PTR );
+}
+
+
+
+/*
+ * Function : init_board( unsigned short port, int irq )
+ *
+ * Purpose : Set the board up to handle the SCSI interface
+ *
+ * Inputs : port - base address of the board,
+ * irq - irq to assign to the SCSI port
+ * force_irq - set it even if it conflicts with sound driver
+ *
+ */
+
+void init_board( unsigned short io_port, int irq, int force_irq )
+{
+ unsigned int tmp;
+ unsigned int pas_irq_code;
+
+ /* Initialize the SCSI part of the board */
+
+ outb( 0x30, io_port + P_TIMEOUT_COUNTER_REG ); /* Timeout counter */
+ outb( 0x01, io_port + P_TIMEOUT_STATUS_REG_OFFSET ); /* Reset TC */
+ outb( 0x01, io_port + WAIT_STATE ); /* 1 Wait state */
+
+ NCR5380_read( RESET_PARITY_INTERRUPT_REG );
+
+ /* Set the SCSI interrupt pointer without mucking up the sound
+ * interrupt pointer in the same byte.
+ */
+ pas_irq_code = ( irq < 16 ) ? scsi_irq_translate[irq] : 0;
+ tmp = inb( io_port + IO_CONFIG_3 );
+
+ if( (( tmp & 0x0f ) == pas_irq_code) && pas_irq_code > 0
+ && !force_irq )
+ {
+ printk( "pas16: WARNING: Can't use same irq as sound "
+ "driver -- interrupts disabled\n" );
+ /* Set up the drive parameters, disable 5380 interrupts */
+ outb( 0x4d, io_port + SYS_CONFIG_4 );
+ }
+ else
+ {
+ tmp = ( tmp & 0x0f ) | ( pas_irq_code << 4 );
+ outb( tmp, io_port + IO_CONFIG_3 );
+
+ /* Set up the drive parameters and enable 5380 interrupts */
+ outb( 0x6d, io_port + SYS_CONFIG_4 );
+ }
+}
+
+
+/*
+ * Function : pas16_hw_detect( unsigned short board_num )
+ *
+ * Purpose : determine if a pas16 board is present
+ *
+ * Inputs : board_num - logical board number ( 0 - 3 )
+ *
+ * Returns : 0 if board not found, 1 if found.
+ */
+
+int pas16_hw_detect( unsigned short board_num )
+{
+ unsigned char board_rev, tmp;
+ unsigned short io_port = bases[ board_num ].io_port;
+
+ /* See if we can find a PAS16 board at the address associated
+ * with this logical board number.
+ */
+
+ /* First, attempt to take a newer model board out of reset and
+ * give it a base address. This shouldn't affect older boards.
+ */
+ enable_board( board_num, io_port );
+
+ /* Now see if it looks like a PAS16 board */
+ board_rev = inb( io_port + PCB_CONFIG );
+
+ if( board_rev == 0xff )
+ return 0;
+
+ tmp = board_rev ^ 0xe0;
+
+ outb( tmp, io_port + PCB_CONFIG );
+ tmp = inb( io_port + PCB_CONFIG );
+ outb( board_rev, io_port + PCB_CONFIG );
+
+ if( board_rev != tmp ) /* Not a PAS-16 */
+ return 0;
+
+ if( ( inb( io_port + OPERATION_MODE_1 ) & 0x03 ) != 0x03 )
+ return 0; /* return if no SCSI interface found */
+
+ /* Mediavision has some new model boards that return ID bits
+ * that indicate a SCSI interface, but they're not (LMS). We'll
+ * put in an additional test to try to weed them out.
+ */
+
+ outb( 0x01, io_port + WAIT_STATE ); /* 1 Wait state */
+ NCR5380_write( MODE_REG, 0x20 ); /* Is it really SCSI? */
+ if( NCR5380_read( MODE_REG ) != 0x20 ) /* Write to a reg. */
+ return 0; /* and try to read */
+ NCR5380_write( MODE_REG, 0x00 ); /* it back. */
+ if( NCR5380_read( MODE_REG ) != 0x00 )
+ return 0;
+
+ return 1;
+}
+
+
+/*
+ * Function : pas16_setup(char *str, int *ints)
+ *
+ * Purpose : LILO command line initialization of the overrides array,
+ *
+ * Inputs : str - unused, ints - array of integer parameters with ints[0]
+ * equal to the number of ints.
+ *
+ */
+
+void pas16_setup(char *str, int *ints) {
+ static int commandline_current = 0;
+ int i;
+ if (ints[0] != 2)
+ printk("pas16_setup : usage pas16=io_port,irq\n");
+ else
+ if (commandline_current < NO_OVERRIDES) {
+ overrides[commandline_current].io_port = (unsigned short) ints[1];
+ overrides[commandline_current].irq = ints[2];
+ for (i = 0; i < NO_BASES; ++i)
+ if (bases[i].io_port == (unsigned short) ints[1]) {
+ bases[i].noauto = 1;
+ break;
+ }
+ ++commandline_current;
+ }
+}
+
+/*
+ * Function : int pas16_detect(Scsi_Host_Template * tpnt)
+ *
+ * Purpose : detects and initializes PAS16 controllers
+ * that were autoprobed, overridden on the LILO command line,
+ * or specified at compile time.
+ *
+ * Inputs : tpnt - template for this SCSI adapter.
+ *
+ * Returns : 1 if a host adapter was found, 0 if not.
+ *
+ */
+
+int pas16_detect(Scsi_Host_Template * tpnt) {
+ static int current_override = 0;
+ static unsigned short current_base = 0;
+ struct Scsi_Host *instance;
+ unsigned short io_port;
+ int count;
+
+ tpnt->proc_dir = &proc_scsi_pas16;
+ tpnt->proc_info = &pas16_proc_info;
+
+ for (count = 0; current_override < NO_OVERRIDES; ++current_override) {
+ io_port = 0;
+
+ if (overrides[current_override].io_port)
+ {
+ io_port = overrides[current_override].io_port;
+ enable_board( current_override, io_port );
+ init_board( io_port, overrides[current_override].irq, 1 );
+ }
+ else
+ for (; !io_port && (current_base < NO_BASES); ++current_base) {
+#if (PDEBUG & PDEBUG_INIT)
+ printk("scsi-pas16 : probing io_port %04x\n", (unsigned int) bases[current_base].io_port);
+#endif
+ if ( !bases[current_base].noauto &&
+ pas16_hw_detect( current_base ) ){
+ io_port = bases[current_base].io_port;
+ init_board( io_port, default_irqs[ current_base ], 0 );
+#if (PDEBUG & PDEBUG_INIT)
+ printk("scsi-pas16 : detected board.\n");
+#endif
+ }
+ }
+
+
+#if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
+ printk("scsi-pas16 : io_port = %04x\n", (unsigned int) io_port);
+#endif
+
+ if (!io_port)
+ break;
+
+ instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata));
+ instance->io_port = io_port;
+
+ NCR5380_init(instance, 0);
+
+ if (overrides[current_override].irq != IRQ_AUTO)
+ instance->irq = overrides[current_override].irq;
+ else
+ instance->irq = NCR5380_probe_irq(instance, PAS16_IRQS);
+
+ if (instance->irq != IRQ_NONE)
+ if (request_irq(instance->irq, pas16_intr, SA_INTERRUPT, "pas16", NULL)) {
+ printk("scsi%d : IRQ%d not free, interrupts disabled\n",
+ instance->host_no, instance->irq);
+ instance->irq = IRQ_NONE;
+ }
+
+ if (instance->irq == IRQ_NONE) {
+ printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no);
+ printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no);
+ /* Disable 5380 interrupts, leave drive params the same */
+ outb( 0x4d, io_port + SYS_CONFIG_4 );
+ outb( (inb(io_port + IO_CONFIG_3) & 0x0f), io_port + IO_CONFIG_3 );
+ }
+
+#if defined(PDEBUG) && (PDEBUG & PDEBUG_INIT)
+ printk("scsi%d : irq = %d\n", instance->host_no, instance->irq);
+#endif
+
+ printk("scsi%d : at 0x%04x", instance->host_no, (int)
+ instance->io_port);
+ if (instance->irq == IRQ_NONE)
+ printk (" interrupts disabled");
+ else
+ printk (" irq %d", instance->irq);
+ printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d",
+ CAN_QUEUE, CMD_PER_LUN, PAS16_PUBLIC_RELEASE);
+ NCR5380_print_options(instance);
+ printk("\n");
+
+ ++current_override;
+ ++count;
+ }
+ return count;
+}
+
+/*
+ * Function : int pas16_biosparam(Disk *disk, kdev_t dev, int *ip)
+ *
+ * Purpose : Generates a BIOS / DOS compatible H-C-S mapping for
+ * the specified device / size.
+ *
+ * Inputs : size = size of device in sectors (512 bytes), dev = block device
+ * major / minor, ip[] = {heads, sectors, cylinders}
+ *
+ * Returns : always 0 (success), initializes ip
+ *
+ */
+
+/*
+ * XXX Most SCSI boards use this mapping, I could be incorrect. Some one
+ * using hard disks on a trantor should verify that this mapping corresponds
+ * to that used by the BIOS / ASPI driver by running the linux fdisk program
+ * and matching the H_C_S coordinates to what DOS uses.
+ */
+
+int pas16_biosparam(Disk * disk, kdev_t dev, int * ip)
+{
+ int size = disk->capacity;
+ ip[0] = 64;
+ ip[1] = 32;
+ ip[2] = size >> 11; /* I think I have it as /(32*64) */
+ if( ip[2] > 1024 ) { /* yes, >, not >= */
+ ip[0]=255;
+ ip[1]=63;
+ ip[2]=size/(63*255);
+ if( ip[2] > 1023 ) /* yes >1023... */
+ ip[2] = 1023;
+ }
+
+ return 0;
+}
+
+/*
+ * Function : int NCR5380_pread (struct Scsi_Host *instance,
+ * unsigned char *dst, int len)
+ *
+ * Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to
+ * dst
+ *
+ * Inputs : dst = destination, len = length in bytes
+ *
+ * Returns : 0 on success, non zero on a failure such as a watchdog
+ * timeout.
+ */
+
+static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst,
+ int len) {
+ register unsigned char *d = dst;
+ register unsigned short reg = (unsigned short) (instance->io_port +
+ P_DATA_REG_OFFSET);
+ register int i = len;
+ int ii = 0;
+
+ while ( !(inb(instance->io_port + P_STATUS_REG_OFFSET) & P_ST_RDY) )
+ ++ii;
+
+ insb( reg, d, i );
+
+ if ( inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
+ outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
+ printk("scsi%d : watchdog timer fired in NCR5380_pread()\n",
+ instance->host_no);
+ return -1;
+ }
+ if (ii > pas_maxi)
+ pas_maxi = ii;
+ return 0;
+}
+
+/*
+ * Function : int NCR5380_pwrite (struct Scsi_Host *instance,
+ * unsigned char *src, int len)
+ *
+ * Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from
+ * src
+ *
+ * Inputs : src = source, len = length in bytes
+ *
+ * Returns : 0 on success, non zero on a failure such as a watchdog
+ * timeout.
+ */
+
+static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src,
+ int len) {
+ register unsigned char *s = src;
+ register unsigned short reg = (instance->io_port + P_DATA_REG_OFFSET);
+ register int i = len;
+ int ii = 0;
+
+ while ( !((inb(instance->io_port + P_STATUS_REG_OFFSET)) & P_ST_RDY) )
+ ++ii;
+
+ outsb( reg, s, i );
+
+ if (inb(instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET) & P_TS_TIM) {
+ outb( P_TS_CT, instance->io_port + P_TIMEOUT_STATUS_REG_OFFSET);
+ printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n",
+ instance->host_no);
+ return -1;
+ }
+ if (ii > pas_maxi)
+ pas_wmaxi = ii;
+ return 0;
+}
+
+#include "NCR5380.c"
+
+#ifdef MODULE
+/* Eventually this will go into an include file, but this will be later */
+Scsi_Host_Template driver_template = MV_PAS16;
+
+#include <linux/module.h>
+#include "scsi_module.c"
+#endif
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