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https://github.com/torvalds/linux
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140 lines
3.5 KiB
C
140 lines
3.5 KiB
C
/*
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* Detection routine for the NCR53c710 based Amiga SCSI Controllers for Linux.
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* Amiga MacroSystemUS WarpEngine SCSI controller.
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* Amiga Technologies A4000T SCSI controller.
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* Amiga Technologies/DKB A4091 SCSI controller.
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*
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* Written 1997 by Alan Hourihane <alanh@fairlite.demon.co.uk>
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* plus modifications of the 53c7xx.c driver to support the Amiga.
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*/
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#include <linux/types.h>
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#include <linux/mm.h>
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#include <linux/blkdev.h>
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#include <linux/sched.h>
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#include <linux/config.h>
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#include <linux/zorro.h>
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#include <linux/stat.h>
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#include <asm/setup.h>
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#include <asm/page.h>
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#include <asm/pgtable.h>
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#include <asm/amigaints.h>
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#include <asm/amigahw.h>
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#include <asm/dma.h>
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#include <asm/irq.h>
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#include "scsi.h"
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#include <scsi/scsi_host.h>
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#include "53c7xx.h"
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#include "amiga7xx.h"
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static int amiga7xx_register_one(struct scsi_host_template *tpnt,
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unsigned long address)
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{
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long long options;
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int clock;
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if (!request_mem_region(address, 0x1000, "ncr53c710"))
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return 0;
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address = (unsigned long)z_ioremap(address, 0x1000);
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options = OPTION_MEMORY_MAPPED | OPTION_DEBUG_TEST1 | OPTION_INTFLY |
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OPTION_SYNCHRONOUS | OPTION_ALWAYS_SYNCHRONOUS |
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OPTION_DISCONNECT;
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clock = 50000000; /* 50 MHz SCSI Clock */
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ncr53c7xx_init(tpnt, 0, 710, address, 0, IRQ_AMIGA_PORTS, DMA_NONE,
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options, clock);
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return 1;
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}
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#ifdef CONFIG_ZORRO
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static struct {
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zorro_id id;
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unsigned long offset;
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int absolute; /* offset is absolute address */
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} amiga7xx_table[] = {
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{ .id = ZORRO_PROD_PHASE5_BLIZZARD_603E_PLUS, .offset = 0xf40000,
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.absolute = 1 },
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{ .id = ZORRO_PROD_MACROSYSTEMS_WARP_ENGINE_40xx, .offset = 0x40000 },
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{ .id = ZORRO_PROD_CBM_A4091_1, .offset = 0x800000 },
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{ .id = ZORRO_PROD_CBM_A4091_2, .offset = 0x800000 },
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{ .id = ZORRO_PROD_GVP_GFORCE_040_060, .offset = 0x40000 },
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{ 0 }
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};
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static int __init amiga7xx_zorro_detect(struct scsi_host_template *tpnt)
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{
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int num = 0, i;
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struct zorro_dev *z = NULL;
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unsigned long address;
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while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
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for (i = 0; amiga7xx_table[i].id; i++)
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if (z->id == amiga7xx_table[i].id)
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break;
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if (!amiga7xx_table[i].id)
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continue;
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if (amiga7xx_table[i].absolute)
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address = amiga7xx_table[i].offset;
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else
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address = z->resource.start + amiga7xx_table[i].offset;
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num += amiga7xx_register_one(tpnt, address);
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}
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return num;
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}
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#endif /* CONFIG_ZORRO */
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int __init amiga7xx_detect(struct scsi_host_template *tpnt)
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{
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static unsigned char called = 0;
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int num = 0;
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if (called || !MACH_IS_AMIGA)
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return 0;
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tpnt->proc_name = "Amiga7xx";
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if (AMIGAHW_PRESENT(A4000_SCSI))
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num += amiga7xx_register_one(tpnt, 0xdd0040);
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#ifdef CONFIG_ZORRO
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num += amiga7xx_zorro_detect(tpnt);
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#endif
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called = 1;
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return num;
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}
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static int amiga7xx_release(struct Scsi_Host *shost)
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{
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if (shost->irq)
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free_irq(shost->irq, NULL);
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if (shost->dma_channel != 0xff)
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free_dma(shost->dma_channel);
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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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return 0;
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}
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static struct scsi_host_template driver_template = {
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.name = "Amiga NCR53c710 SCSI",
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.detect = amiga7xx_detect,
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.release = amiga7xx_release,
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.queuecommand = NCR53c7xx_queue_command,
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.abort = NCR53c7xx_abort,
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.reset = NCR53c7xx_reset,
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.can_queue = 24,
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.this_id = 7,
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.sg_tablesize = 63,
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.cmd_per_lun = 3,
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.use_clustering = DISABLE_CLUSTERING
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};
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#include "scsi_module.c"
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