| #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 <linux/signal.h> | |
| #include <linux/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 ARRAY_SIZE(overrides) | |
| static struct base { | |
| unsigned int address; | |
| int noauto; | |
| } bases[] __initdata = { | |
| { 0xcc000, 0}, { 0xc8000, 0}, { 0xdc000, 0}, { 0xd8000, 0} | |
| }; | |
| #define NO_BASES ARRAY_SIZE(bases) | |
| static struct signature { | |
| const char *string; | |
| int offset; | |
| } signatures[] __initdata = { | |
| {"TSROM: SCSI BIOS, Version 1.12", 0x36}, | |
| }; | |
| #define NO_SIGNATURES ARRAY_SIZE(signatures) | |
| /* | |
| * 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(struct 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(struct 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->show_info = t128_show_info; | |
| tpnt->write_info = t128_write_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, IRQF_DISABLED, "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, shost); | |
| 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 struct 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, | |
| .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" |