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443 lines
12 KiB
443 lines
12 KiB
#define AUTOSENSE |
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#define PSEUDO_DMA |
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/* |
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* Trantor T128/T128F/T228 driver |
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* Note : architecturally, the T100 and T130 are different and won't |
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* work |
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* |
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* Copyright 1993, Drew Eckhardt |
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* Visionary Computing |
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* (Unix and Linux consulting and custom programming) |
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* drew@colorado.edu |
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* +1 (303) 440-4894 |
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* |
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* DISTRIBUTION RELEASE 3. |
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* |
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* For more information, please consult |
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* |
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* Trantor Systems, Ltd. |
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* T128/T128F/T228 SCSI Host Adapter |
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* Hardware Specifications |
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* |
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* Trantor Systems, Ltd. |
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* 5415 Randall Place |
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* Fremont, CA 94538 |
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* 1+ (415) 770-1400, FAX 1+ (415) 770-9910 |
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* |
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* and |
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* |
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* NCR 5380 Family |
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* SCSI Protocol Controller |
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* Databook |
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* |
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* NCR Microelectronics |
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* 1635 Aeroplaza Drive |
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* Colorado Springs, CO 80916 |
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* 1+ (719) 578-3400 |
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* 1+ (800) 334-5454 |
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*/ |
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/* |
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* Options : |
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* AUTOSENSE - if defined, REQUEST SENSE will be performed automatically |
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* for commands that return with a CHECK CONDITION status. |
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* |
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* PSEUDO_DMA - enables PSEUDO-DMA hardware, should give a 3-4X performance |
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* increase compared to polled I/O. |
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* |
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* PARITY - enable parity checking. Not supported. |
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* |
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* SCSI2 - enable support for SCSI-II tagged queueing. Untested. |
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* |
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* |
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* UNSAFE - leave interrupts enabled during pseudo-DMA transfers. You |
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* only really want to use this if you're having a problem with |
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* dropped characters during high speed communications, and even |
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* then, you're going to be better off twiddling with transfersize. |
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* |
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* USLEEP - enable support for devices that don't disconnect. Untested. |
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* |
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* The card is detected and initialized in one of several ways : |
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* 1. Autoprobe (default) - since the board is memory mapped, |
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* a BIOS signature is scanned for to locate the registers. |
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* An interrupt is triggered to autoprobe for the interrupt |
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* line. |
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* |
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* 2. With command line overrides - t128=address,irq may be |
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* used on the LILO command line to override the defaults. |
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* |
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* 3. With the T128_OVERRIDE compile time define. This is |
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* specified as an array of address, irq tuples. Ie, for |
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* one board at the default 0xcc000 address, IRQ5, I could say |
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* -DT128_OVERRIDE={{0xcc000, 5}} |
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* |
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* Note that if the override methods are used, place holders must |
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* be specified for other boards in the system. |
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* |
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* T128/T128F jumper/dipswitch settings (note : on my sample, the switches |
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* were epoxy'd shut, meaning I couldn't change the 0xcc000 base address) : |
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* |
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* T128 Sw7 Sw8 Sw6 = 0ws Sw5 = boot |
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* T128F Sw6 Sw7 Sw5 = 0ws Sw4 = boot Sw8 = floppy disable |
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* cc000 off off |
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* c8000 off on |
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* dc000 on off |
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* d8000 on on |
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* |
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* |
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* Interrupts |
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* There is a 12 pin jumper block, jp1, numbered as follows : |
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* T128 (JP1) T128F (J5) |
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* 2 4 6 8 10 12 11 9 7 5 3 1 |
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* 1 3 5 7 9 11 12 10 8 6 4 2 |
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* |
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* 3 2-4 |
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* 5 1-3 |
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* 7 3-5 |
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* T128F only |
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* 10 8-10 |
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* 12 7-9 |
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* 14 10-12 |
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* 15 9-11 |
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*/ |
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#include <linux/signal.h> |
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#include <linux/io.h> |
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#include <linux/blkdev.h> |
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#include <linux/interrupt.h> |
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#include <linux/stat.h> |
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#include <linux/init.h> |
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#include <linux/module.h> |
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#include <linux/delay.h> |
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#include "scsi.h" |
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#include <scsi/scsi_host.h> |
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#include "t128.h" |
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#define AUTOPROBE_IRQ |
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#include "NCR5380.h" |
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static struct override { |
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unsigned long address; |
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int irq; |
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} overrides |
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#ifdef T128_OVERRIDE |
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[] __initdata = T128_OVERRIDE; |
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#else |
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[4] __initdata = {{0, IRQ_AUTO}, {0, IRQ_AUTO}, |
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{0 ,IRQ_AUTO}, {0, IRQ_AUTO}}; |
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#endif |
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#define NO_OVERRIDES ARRAY_SIZE(overrides) |
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static struct base { |
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unsigned int address; |
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int noauto; |
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} bases[] __initdata = { |
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{ 0xcc000, 0}, { 0xc8000, 0}, { 0xdc000, 0}, { 0xd8000, 0} |
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}; |
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#define NO_BASES ARRAY_SIZE(bases) |
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static struct signature { |
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const char *string; |
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int offset; |
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} signatures[] __initdata = { |
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{"TSROM: SCSI BIOS, Version 1.12", 0x36}, |
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}; |
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#define NO_SIGNATURES ARRAY_SIZE(signatures) |
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/* |
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* Function : t128_setup(char *str, int *ints) |
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* |
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* Purpose : LILO command line initialization of the overrides array, |
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* |
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* Inputs : str - unused, ints - array of integer parameters with ints[0] |
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* equal to the number of ints. |
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* |
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*/ |
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void __init t128_setup(char *str, int *ints){ |
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static int commandline_current = 0; |
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int i; |
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if (ints[0] != 2) |
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printk("t128_setup : usage t128=address,irq\n"); |
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else |
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if (commandline_current < NO_OVERRIDES) { |
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overrides[commandline_current].address = ints[1]; |
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overrides[commandline_current].irq = ints[2]; |
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for (i = 0; i < NO_BASES; ++i) |
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if (bases[i].address == ints[1]) { |
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bases[i].noauto = 1; |
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break; |
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} |
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++commandline_current; |
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} |
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} |
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/* |
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* Function : int t128_detect(struct scsi_host_template * tpnt) |
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* |
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* Purpose : detects and initializes T128,T128F, or T228 controllers |
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* that were autoprobed, overridden on the LILO command line, |
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* or specified at compile time. |
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* |
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* Inputs : tpnt - template for this SCSI adapter. |
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* |
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* Returns : 1 if a host adapter was found, 0 if not. |
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* |
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*/ |
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int __init t128_detect(struct scsi_host_template * tpnt){ |
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static int current_override = 0, current_base = 0; |
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struct Scsi_Host *instance; |
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unsigned long base; |
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void __iomem *p; |
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int sig, count; |
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tpnt->proc_name = "t128"; |
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tpnt->show_info = t128_show_info; |
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tpnt->write_info = t128_write_info; |
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for (count = 0; current_override < NO_OVERRIDES; ++current_override) { |
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base = 0; |
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p = NULL; |
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if (overrides[current_override].address) { |
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base = overrides[current_override].address; |
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p = ioremap(bases[current_base].address, 0x2000); |
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if (!p) |
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base = 0; |
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} else |
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for (; !base && (current_base < NO_BASES); ++current_base) { |
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#if (TDEBUG & TDEBUG_INIT) |
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printk("scsi-t128 : probing address %08x\n", bases[current_base].address); |
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#endif |
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if (bases[current_base].noauto) |
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continue; |
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p = ioremap(bases[current_base].address, 0x2000); |
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if (!p) |
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continue; |
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for (sig = 0; sig < NO_SIGNATURES; ++sig) |
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if (check_signature(p + signatures[sig].offset, |
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signatures[sig].string, |
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strlen(signatures[sig].string))) { |
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base = bases[current_base].address; |
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#if (TDEBUG & TDEBUG_INIT) |
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printk("scsi-t128 : detected board.\n"); |
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#endif |
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goto found; |
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} |
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iounmap(p); |
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} |
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#if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT) |
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printk("scsi-t128 : base = %08x\n", (unsigned int) base); |
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#endif |
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if (!base) |
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break; |
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found: |
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instance = scsi_register (tpnt, sizeof(struct NCR5380_hostdata)); |
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if(instance == NULL) |
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break; |
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instance->base = base; |
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((struct NCR5380_hostdata *)instance->hostdata)->base = p; |
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NCR5380_init(instance, 0); |
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if (overrides[current_override].irq != IRQ_AUTO) |
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instance->irq = overrides[current_override].irq; |
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else |
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instance->irq = NCR5380_probe_irq(instance, T128_IRQS); |
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if (instance->irq != SCSI_IRQ_NONE) |
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if (request_irq(instance->irq, t128_intr, 0, "t128", |
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instance)) { |
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printk("scsi%d : IRQ%d not free, interrupts disabled\n", |
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instance->host_no, instance->irq); |
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instance->irq = SCSI_IRQ_NONE; |
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} |
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if (instance->irq == SCSI_IRQ_NONE) { |
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printk("scsi%d : interrupts not enabled. for better interactive performance,\n", instance->host_no); |
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printk("scsi%d : please jumper the board for a free IRQ.\n", instance->host_no); |
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} |
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#if defined(TDEBUG) && (TDEBUG & TDEBUG_INIT) |
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printk("scsi%d : irq = %d\n", instance->host_no, instance->irq); |
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#endif |
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printk("scsi%d : at 0x%08lx", instance->host_no, instance->base); |
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if (instance->irq == SCSI_IRQ_NONE) |
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printk (" interrupts disabled"); |
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else |
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printk (" irq %d", instance->irq); |
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printk(" options CAN_QUEUE=%d CMD_PER_LUN=%d release=%d", |
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CAN_QUEUE, CMD_PER_LUN, T128_PUBLIC_RELEASE); |
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NCR5380_print_options(instance); |
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printk("\n"); |
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++current_override; |
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++count; |
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} |
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return count; |
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} |
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static int t128_release(struct Scsi_Host *shost) |
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{ |
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NCR5380_local_declare(); |
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NCR5380_setup(shost); |
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if (shost->irq) |
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free_irq(shost->irq, shost); |
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NCR5380_exit(shost); |
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if (shost->io_port && shost->n_io_port) |
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release_region(shost->io_port, shost->n_io_port); |
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scsi_unregister(shost); |
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iounmap(base); |
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return 0; |
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} |
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/* |
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* Function : int t128_biosparam(Disk * disk, struct block_device *dev, int *ip) |
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* |
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* Purpose : Generates a BIOS / DOS compatible H-C-S mapping for |
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* the specified device / size. |
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* |
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* Inputs : size = size of device in sectors (512 bytes), dev = block device |
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* major / minor, ip[] = {heads, sectors, cylinders} |
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* |
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* Returns : always 0 (success), initializes ip |
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* |
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*/ |
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/* |
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* XXX Most SCSI boards use this mapping, I could be incorrect. Some one |
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* using hard disks on a trantor should verify that this mapping corresponds |
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* to that used by the BIOS / ASPI driver by running the linux fdisk program |
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* and matching the H_C_S coordinates to what DOS uses. |
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*/ |
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int t128_biosparam(struct scsi_device *sdev, struct block_device *bdev, |
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sector_t capacity, int * ip) |
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{ |
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ip[0] = 64; |
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ip[1] = 32; |
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ip[2] = capacity >> 11; |
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return 0; |
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} |
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/* |
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* Function : int NCR5380_pread (struct Scsi_Host *instance, |
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* unsigned char *dst, int len) |
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* |
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* Purpose : Fast 5380 pseudo-dma read function, transfers len bytes to |
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* dst |
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* |
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* Inputs : dst = destination, len = length in bytes |
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* |
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* Returns : 0 on success, non zero on a failure such as a watchdog |
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* timeout. |
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*/ |
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static inline int NCR5380_pread (struct Scsi_Host *instance, unsigned char *dst, |
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int len) { |
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NCR5380_local_declare(); |
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void __iomem *reg; |
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unsigned char *d = dst; |
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register int i = len; |
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NCR5380_setup(instance); |
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reg = base + T_DATA_REG_OFFSET; |
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#if 0 |
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for (; i; --i) { |
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while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier(); |
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#else |
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while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier(); |
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for (; i; --i) { |
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#endif |
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*d++ = readb(reg); |
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} |
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if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) { |
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unsigned char tmp; |
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void __iomem *foo = base + T_CONTROL_REG_OFFSET; |
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tmp = readb(foo); |
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writeb(tmp | T_CR_CT, foo); |
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writeb(tmp, foo); |
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printk("scsi%d : watchdog timer fired in NCR5380_pread()\n", |
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instance->host_no); |
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return -1; |
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} else |
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return 0; |
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} |
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/* |
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* Function : int NCR5380_pwrite (struct Scsi_Host *instance, |
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* unsigned char *src, int len) |
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* |
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* Purpose : Fast 5380 pseudo-dma write function, transfers len bytes from |
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* src |
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* |
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* Inputs : src = source, len = length in bytes |
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* |
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* Returns : 0 on success, non zero on a failure such as a watchdog |
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* timeout. |
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*/ |
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static inline int NCR5380_pwrite (struct Scsi_Host *instance, unsigned char *src, |
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int len) { |
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NCR5380_local_declare(); |
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void __iomem *reg; |
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unsigned char *s = src; |
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register int i = len; |
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NCR5380_setup(instance); |
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reg = base + T_DATA_REG_OFFSET; |
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#if 0 |
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for (; i; --i) { |
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while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier(); |
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#else |
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while (!(readb(base+T_STATUS_REG_OFFSET) & T_ST_RDY)) barrier(); |
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for (; i; --i) { |
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#endif |
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writeb(*s++, reg); |
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} |
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if (readb(base + T_STATUS_REG_OFFSET) & T_ST_TIM) { |
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unsigned char tmp; |
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void __iomem *foo = base + T_CONTROL_REG_OFFSET; |
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tmp = readb(foo); |
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writeb(tmp | T_CR_CT, foo); |
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writeb(tmp, foo); |
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printk("scsi%d : watchdog timer fired in NCR5380_pwrite()\n", |
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instance->host_no); |
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return -1; |
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} else |
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return 0; |
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} |
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MODULE_LICENSE("GPL"); |
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#include "NCR5380.c" |
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static struct scsi_host_template driver_template = { |
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.name = "Trantor T128/T128F/T228", |
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.detect = t128_detect, |
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.release = t128_release, |
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.queuecommand = t128_queue_command, |
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.eh_abort_handler = t128_abort, |
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.eh_bus_reset_handler = t128_bus_reset, |
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.bios_param = t128_biosparam, |
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.can_queue = CAN_QUEUE, |
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.this_id = 7, |
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.sg_tablesize = SG_ALL, |
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.cmd_per_lun = CMD_PER_LUN, |
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.use_clustering = DISABLE_CLUSTERING, |
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}; |
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#include "scsi_module.c"
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