| #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; |
| |
| |
| static const 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. |
| */ |
| static 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)) |
| |
| static const 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"); |