#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. * * 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. * * 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 */ #include #include #include #include #include #include "scsi.h" #include "hosts.h" #include "t128.h" #define AUTOPROBE_IRQ #include "NCR5380.h" #include "constants.h" #include "sd.h" #include #include #include 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 const struct signature { const char *string; int offset; } signatures[] __initdata = { {"TSROM: SCSI BIOS, Version 1.12", 0x36}, }; #define NO_SIGNATURES (sizeof (signatures) / sizeof (struct signature)) /** * t128_setup * @str: command line * * LILO command line initialization of the overrides array, */ int __init t128_setup(char *str) { static int commandline_current = 0; int ints[10]; int i; get_options(str, sizeof(ints) / sizeof(int), ints); if (ints[0] != 2) printk(KERN_ERR "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; } return 1; } __setup("t128=", t128_setup); /** * t128_detect - detect controllers * @tpnt: SCSI template * * Detects and initializes T128,T128F, or T228 controllers * that were autoprobed, overridden on the LILO command line, * or specified at compile time. */ int __init t128_detect(Scsi_Host_Template * tpnt) { static int current_override = 0, current_base = 0; struct Scsi_Host *instance; unsigned long base; int sig, count; tpnt->proc_name = "t128"; tpnt->proc_info = &t128_proc_info; for (count = 0; current_override < NO_OVERRIDES; ++current_override) { base = 0; if (overrides[current_override].address) base = overrides[current_override].address; else for (; !base && (current_base < NO_BASES); ++current_base) { for (sig = 0; sig < NO_SIGNATURES; ++sig) if (!bases[current_base].noauto && isa_check_signature(bases[current_base].address + signatures[sig].offset, signatures[sig].string, strlen(signatures[sig].string))) { base = bases[current_base].address; break; } } if (!base) break; instance = scsi_register(tpnt, sizeof(struct NCR5380_hostdata)); if (instance == NULL) break; instance->base = base; 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 != IRQ_NONE) if (request_irq(instance->irq, do_t128_intr, SA_INTERRUPT, "t128", NULL)) { printk(KERN_WARNING "scsi%d : IRQ%d not free, interrupts disabled\n", instance->host_no, instance->irq); instance->irq = IRQ_NONE; } if (instance->irq == IRQ_NONE) { printk(KERN_INFO "scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no); printk(KERN_INFO "scsi%d : please jumper the board for a free IRQ.\n", instance->host_no); } printk(KERN_INFO "scsi%d : at 0x%08lx", instance->host_no,instance->base); 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, T128_PUBLIC_RELEASE); NCR5380_print_options(instance); printk("\n"); ++current_override; ++count; } return count; } /** * t128_biosparam - disk geometry * @disk: device * @dev: device major/minor * @ip: array to return results * * Generates a BIOS / DOS compatible H-C-S mapping for * the specified device / size. * * 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 those * that DOS uses. */ int t128_biosparam(Disk * disk, kdev_t dev, int *ip) { int size = disk->capacity; ip[0] = 64; ip[1] = 32; ip[2] = size >> 11; return 0; } /** * NCR5380_pread - pseudo DMA read * @instance: controller * @dst: buffer to write to * @len: expect/max length * * Fast 5380 pseudo-dma read function, transfers len bytes to * dst from the controller. */ static inline int NCR5380_pread(struct Scsi_Host *instance, unsigned char *dst, int len) { unsigned long reg = instance->base + T_DATA_REG_OFFSET; unsigned char *d = dst; int i = len; while (!(isa_readb(instance->base + T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier(); for (; i; --i) { *d++ = isa_readb(reg); } if (isa_readb(instance->base + T_STATUS_REG_OFFSET) & T_ST_TIM) { unsigned char tmp; unsigned long foo; foo = instance->base + T_CONTROL_REG_OFFSET; tmp = isa_readb(foo); isa_writeb(tmp | T_CR_CT, foo); isa_writeb(tmp, foo); printk(KERN_ERR "scsi%d : watchdog timer fired in t128 NCR5380_pread.\n", instance->host_no); return -1; } else return 0; } /** * NCR5380_pwrite - pseudo DMA write * @instance: controller * @dst: buffer to write to * @len: expect/max length * * Fast 5380 pseudo-dma write function, transfers len bytes from * dst to the controller. */ static inline int NCR5380_pwrite(struct Scsi_Host *instance, unsigned char *src, int len) { unsigned long reg = instance->base + T_DATA_REG_OFFSET; unsigned char *s = src; int i = len; while (!(isa_readb(instance->base + T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier(); for (; i; --i) { isa_writeb(*s++, reg); } if (isa_readb(instance->base + T_STATUS_REG_OFFSET) & T_ST_TIM) { unsigned char tmp; unsigned long foo; foo = instance->base + T_CONTROL_REG_OFFSET; tmp = isa_readb(foo); isa_writeb(tmp | T_CR_CT, foo); isa_writeb(tmp, foo); printk(KERN_ERR "scsi%d : watchdog timer fired in t128 NCR5380_pwrite()\n", instance->host_no); return -1; } else return 0; } MODULE_LICENSE("GPL"); #include "NCR5380.c" /* Eventually this will go into an include file, but this will be later */ static Scsi_Host_Template driver_template = TRANTOR_T128; #include "scsi_module.c"