1 files changed, 639 insertions, 0 deletions

diff --git a/drivers/scsi/pas16.c b/drivers/scsi/pas16.c
new file mode 100644
index 000000000000..e70dedb0d0a5
--- /dev/null
+++ b/drivers/scsi/pas16.c
@@ -0,0 +1,639 @@
+#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.
+ *      
+ * 4.  When included as a module, with arguments passed on the command line:
+ *         pas16_irq=xx         the interrupt
+ *         pas16_addr=xx        the port
+ *     e.g. "modprobe pas16 pas16_addr=0x388 pas16_irq=5"
+ *
+ *     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
+ *
+ *   SCSI_IRQ_NONE (255) should be specified for no interrupt,
+ *   IRQ_AUTO (254) to autoprobe for an IRQ line if overridden
+ *   on the command line.
+ *
+ *   (IRQ_AUTO == 254, SCSI_IRQ_NONE == 255 in NCR5380.h)
+ */
+ 
+#include <linux/module.h>
+
+#include <asm/system.h>
+#include <linux/signal.h>
+#include <linux/proc_fs.h>
+#include <linux/sched.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/stat.h>
+#include <linux/init.h>
+
+#include "scsi.h"
+#include <scsi/scsi_host.h>
+#include "pas16.h"
+#define AUTOPROBE_IRQ
+#include "NCR5380.h"
+
+
+static int pas_maxi = 0;
+static int pas_wmaxi = 0;
+static unsigned short pas16_addr = 0;
+static int pas16_irq = 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[] __initdata = 
+        {  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
+    [] __initdata = PAS16_OVERRIDE;
+#else
+    [4] __initdata = {{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[] __initdata = 
+        { {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
+ *
+ */
+
+static void __init
+        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
+ *
+ */
+
+static void __init 
+        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.
+ */
+
+static int __init 
+     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 __init 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 __init 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_name = "pas16";
+    tpnt->proc_info = &pas16_proc_info;
+
+    if (pas16_addr != 0) {
+        overrides[0].io_port = pas16_addr;
+        /*
+        *  This is how we avoid seeing more than
+        *  one host adapter at the same I/O port.
+        *  Cribbed shamelessly from pas16_setup().
+        */
+        for (count = 0; count < NO_BASES; ++count)
+            if (bases[count].io_port == pas16_addr) {
+                    bases[count].noauto = 1;
+                    break;
+        }
+    }
+    if (pas16_irq != 0)
+        overrides[0].irq = pas16_irq;
+
+    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));
+        if(instance == NULL)
+                break;
+                
+        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 != SCSI_IRQ_NONE) 
+            if (request_irq(instance->irq, pas16_intr, SA_INTERRUPT, "pas16", instance)) {
+                printk("scsi%d : IRQ%d not free, interrupts disabled\n", 
+                    instance->host_no, instance->irq);
+                instance->irq = SCSI_IRQ_NONE;
+            } 
+
+        if (instance->irq == SCSI_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 == SCSI_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, struct block_device *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(struct scsi_device *sdev, struct block_device *dev,
+                sector_t capacity, int * ip)
+{
+  int size = 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"
+
+static int pas16_release(struct Scsi_Host *shost)
+{
+        if (shost->irq)
+                free_irq(shost->irq, NULL);
+        NCR5380_exit(shost);
+        if (shost->dma_channel != 0xff)
+                free_dma(shost->dma_channel);
+        if (shost->io_port && shost->n_io_port)
+                release_region(shost->io_port, shost->n_io_port);
+        scsi_unregister(shost);
+        return 0;
+}
+
+static Scsi_Host_Template driver_template = {
+        .name           = "Pro Audio Spectrum-16 SCSI",
+        .detect         = pas16_detect,
+        .release        = pas16_release,
+        .queuecommand   = pas16_queue_command,
+        .eh_abort_handler = pas16_abort,
+        .eh_bus_reset_handler = pas16_bus_reset,
+        .eh_device_reset_handler = pas16_device_reset,
+        .eh_host_reset_handler = pas16_host_reset,
+        .bios_param     = pas16_biosparam, 
+        .can_queue      = CAN_QUEUE,
+        .this_id        = 7,
+        .sg_tablesize   = SG_ALL,
+        .cmd_per_lun    = CMD_PER_LUN,
+        .use_clustering = DISABLE_CLUSTERING,
+};
+#include "scsi_module.c"
+
+#ifdef MODULE
+module_param(pas16_addr, ushort, 0);
+module_param(pas16_irq, int, 0);
+#endif
+MODULE_LICENSE("GPL");