| #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 |
| * |
| * 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 |
| */ |
| |
| /* |
| * 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 <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/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) |
| |
| #ifndef MODULE |
| /* |
| * 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. |
| * |
| */ |
| |
| static int __init t128_setup(char *str) |
| { |
| static int commandline_current = 0; |
| int i; |
| int ints[10]; |
| |
| get_options(str, ARRAY_SIZE(ints), ints); |
| 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; |
| } |
| return 1; |
| } |
| |
| __setup("t128=", t128_setup); |
| #endif |
| |
| /* |
| * 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. |
| * |
| */ |
| |
| static 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; |
| |
| 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); |
| |
| /* Compatibility with documented NCR5380 kernel parameters */ |
| if (instance->irq == 255) |
| instance->irq = NO_IRQ; |
| |
| if (instance->irq != NO_IRQ) |
| if (request_irq(instance->irq, t128_intr, 0, "t128", |
| instance)) { |
| printk("scsi%d : IRQ%d not free, interrupts disabled\n", |
| instance->host_no, instance->irq); |
| instance->irq = NO_IRQ; |
| } |
| |
| if (instance->irq == NO_IRQ) { |
| 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 |
| |
| ++current_override; |
| ++count; |
| } |
| return count; |
| } |
| |
| static int t128_release(struct Scsi_Host *shost) |
| { |
| NCR5380_local_declare(); |
| NCR5380_setup(shost); |
| if (shost->irq != NO_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. |
| */ |
| |
| static 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, |
| .proc_name = "t128", |
| .show_info = t128_show_info, |
| .write_info = t128_write_info, |
| .info = t128_info, |
| .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" |
