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Diffstat (limited to 'drivers/scsi/t128.c')
| -rw-r--r-- | drivers/scsi/t128.c | 449 |
1 files changed, 449 insertions, 0 deletions
diff --git a/drivers/scsi/t128.c b/drivers/scsi/t128.c new file mode 100644 index 00000000000..6dc2897672a --- /dev/null +++ b/drivers/scsi/t128.c @@ -0,0 +1,449 @@ +#define AUTOSENSE +#define PSEUDO_DMA + +/* + * Trantor T128/T128F/T228 driver + * Note : architecturally, the T100 and T130 are different and won't + * work + * + * Copyright 1993, Drew Eckhardt + * Visionary Computing + * (Unix and Linux consulting and custom programming) + * drew@colorado.edu + * +1 (303) 440-4894 + * + * DISTRIBUTION RELEASE 3. + * + * For more information, please consult + * + * Trantor Systems, Ltd. + * T128/T128F/T228 SCSI Host Adapter + * Hardware Specifications + * + * Trantor Systems, Ltd. + * 5415 Randall Place + * Fremont, CA 94538 + * 1+ (415) 770-1400, FAX 1+ (415) 770-9910 + * + * 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. + * + * 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. You + * only really want to use this if you're having a problem with + * dropped characters during high speed communications, and even + * then, you're going to be better off twiddling with transfersize. + * + * USLEEP - enable support for devices that don't disconnect. Untested. + * + * The card is detected and initialized in one of several ways : + * 1. Autoprobe (default) - since the board is memory mapped, + * a BIOS signature is scanned for to locate the registers. + * An interrupt is triggered to autoprobe for the interrupt + * line. + * + * 2. With command line overrides - t128=address,irq may be + * used on the LILO command line to override the defaults. + * + * 3. With the T128_OVERRIDE compile time define. This is + * specified as an array of address, irq tuples. Ie, for + * one board at the default 0xcc000 address, IRQ5, I could say + * -DT128_OVERRIDE={{0xcc000, 5}} + * + * Note that if the override methods are used, place holders must + * be specified for other boards in the system. + * + * T128/T128F jumper/dipswitch settings (note : on my sample, the switches + * were epoxy'd shut, meaning I couldn't change the 0xcc000 base address) : + * + * T128 Sw7 Sw8 Sw6 = 0ws Sw5 = boot + * T128F Sw6 Sw7 Sw5 = 0ws Sw4 = boot Sw8 = floppy disable + * cc000 off off + * c8000 off on + * dc000 on off + * d8000 on on + * + * + * Interrupts + * There is a 12 pin jumper block, jp1, numbered as follows : + * T128 (JP1) T128F (J5) + * 2 4 6 8 10 12 11 9 7 5 3 1 + * 1 3 5 7 9 11 12 10 8 6 4 2 + * + * 3 2-4 + * 5 1-3 + * 7 3-5 + * T128F only + * 10 8-10 + * 12 7-9 + * 14 10-12 + * 15 9-11 + */ + +/* + * $Log: t128.c,v $ + */ + +#include <asm/system.h> +#include <linux/signal.h> +#include <linux/sched.h> +#include <asm/io.h> +#include <linux/blkdev.h> +#include <linux/interrupt.h> +#include <linux/stat.h> +#include <linux/init.h> +#include <linux/module.h> +#include <linux/delay.h> + +#include "scsi.h" +#include <scsi/scsi_host.h> +#include "t128.h" +#define AUTOPROBE_IRQ +#include "NCR5380.h" + +static struct override { + unsigned long address; + int irq; +} overrides +#ifdef T128_OVERRIDE + [] __initdata = T128_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 int address; + int noauto; +} bases[] __initdata = { + { 0xcc000, 0}, { 0xc8000, 0}, { 0xdc000, 0}, { 0xd8000, 0} +}; + +#define NO_BASES (sizeof (bases) / sizeof (struct base)) + +static struct signature { + const char *string; + int offset; +} signatures[] __initdata = { +{"TSROM: SCSI BIOS, Version 1.12", 0x36}, +}; + +#define NO_SIGNATURES (sizeof (signatures) / sizeof (struct signature)) + +/* + * Function : t128_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 t128_setup(char *str, int *ints){ + static int commandline_current = 0; + int i; + if (ints[0] != 2) + printk("t128_setup : usage t128=address,irq\n"); + else + if (commandline_current < NO_OVERRIDES) { + overrides[commandline_current].address = ints[1]; + overrides[commandline_current].irq = ints[2]; + for (i = 0; i < NO_BASES; ++i) + if (bases[i].address == ints[1]) { + bases[i].noauto = 1; + break; + } + ++commandline_current; + } +} + +/* + * Function : int t128_detect(Scsi_Host_Template * tpnt) + * + * Purpose : detects and initializes T128,T128F, or T228 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 t128_detect(Scsi_Host_Template * tpnt){ + static int current_override = 0, current_base = 0; + struct Scsi_Host *instance; + unsigned long base; + void __iomem *p; + int sig, count; + + tpnt->proc_name = "t128"; + tpnt->proc_info = &t128_proc_info; + + for (count = 0; current_override < NO_OVERRIDES; ++current_override) { + base = 0; + p = NULL; + + if (overrides[current_override].address) { + base = overrides[current_override].address; + p = ioremap(bases[current_base].address, 0x2000); + if (!p) + base = 0; + } else + for (; !base && (current_base < NO_BASES); ++current_base) { +#if (TDEBUG & TDEBUG_INIT) + printk("scsi-t128 : probing address %08x\n", bases[current_base].address); +#endif + if (bases[current_base].noauto) + continue; + p = ioremap(bases[current_base].address, 0x2000); + if (!p) + continue; + for (sig = 0; sig < NO_SIGNATURES; ++sig) + if (check_signature(p + signatures[sig].offset, + signatures[sig].string, + strlen(signatures[sig].string))) { + base = bases[current_base].address; +#if (TDEBUG & TDEBUG_INIT) + printk("scsi-t128 : detected board.\n"); +#endif + goto found; + } + iounmap(p); + } + +#if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT) + printk("scsi-t128 : base = %08x\n", (unsigned int) base); +#endif + + if (!base) + break; + +found: + instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata)); + if(instance == NULL) + break; + + instance->base = base; + ((struct NCR5380_hostdata *)instance->hostdata)->base = p; + + NCR5380_init(instance, 0); + + if (overrides[current_override].irq != IRQ_AUTO) + instance->irq = overrides[current_override].irq; + else + instance->irq = NCR5380_probe_irq(instance, T128_IRQS); + + if (instance->irq != SCSI_IRQ_NONE) + if (request_irq(instance->irq, t128_intr, SA_INTERRUPT, "t128", 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); + } + +#if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT) + printk("scsi%d : irq = %d\n", instance->host_no, instance->irq); +#endif + + printk("scsi%d : at 0x%08lx", instance->host_no, instance->base); + 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, T128_PUBLIC_RELEASE); + NCR5380_print_options(instance); + printk("\n"); + + ++current_override; + ++count; + } + return count; +} + +static int t128_release(struct Scsi_Host *shost) +{ + NCR5380_local_declare(); + NCR5380_setup(shost); + if (shost->irq) + free_irq(shost->irq, NULL); + NCR5380_exit(shost); + if (shost->io_port && shost->n_io_port) + release_region(shost->io_port, shost->n_io_port); + scsi_unregister(shost); + iounmap(base); + return 0; +} + +/* + * Function : int t128_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 t128_biosparam(struct scsi_device *sdev, struct block_device *bdev, + sector_t capacity, int * ip) +{ + ip[0] = 64; + ip[1] = 32; + ip[2] = capacity >> 11; + 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) { + NCR5380_local_declare(); + void __iomem *reg; + unsigned char *d = dst; + register int i = len; + + NCR5380_setup(instance); + reg = base + T_DATA_REG_OFFSET; + +#if 0 + for (; i; --i) { + while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier(); +#else + while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier(); + for (; i; --i) { +#endif + *d++ = readb(reg); + } + + if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) { + unsigned char tmp; + void __iomem *foo = base + T_CONTROL_REG_OFFSET; + tmp = readb(foo); + writeb(tmp | T_CR_CT, foo); + writeb(tmp, foo); + printk("scsi%d : watchdog timer fired in NCR5380_pread()\n", + instance->host_no); + return -1; + } else + 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) { + NCR5380_local_declare(); + void __iomem *reg; + unsigned char *s = src; + register int i = len; + + NCR5380_setup(instance); + reg = base + T_DATA_REG_OFFSET; + +#if 0 + for (; i; --i) { + while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier(); +#else + while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier(); + for (; i; --i) { +#endif + writeb(*s++, reg); + } + + if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) { + unsigned char tmp; + void __iomem *foo = base + T_CONTROL_REG_OFFSET; + tmp = readb(foo); + writeb(tmp | T_CR_CT, foo); + writeb(tmp, foo); + printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n", + instance->host_no); + return -1; + } else + return 0; +} + +MODULE_LICENSE("GPL"); + +#include "NCR5380.c" + +static Scsi_Host_Template driver_template = { + .name = "Trantor T128/T128F/T228", + .detect = t128_detect, + .release = t128_release, + .queuecommand = t128_queue_command, + .eh_abort_handler = t128_abort, + .eh_bus_reset_handler = t128_bus_reset, + .eh_host_reset_handler = t128_host_reset, + .eh_device_reset_handler = t128_device_reset, + .bios_param = t128_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" |