diff options
Diffstat (limited to 'drivers/scsi/pas16.c')
-rw-r--r-- | drivers/scsi/pas16.c | 639 |
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"); |