forked from Minki/linux
1bb4600245
The only chip that needs the workarounds enabled is an early NMOS device. That means that the common case is to disable them. Unfortunately the sense of the flag is such that it has to be set for the common case. Rename the flag so that zero can be used to mean "no errata workarounds needed". This simplifies the code. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Reviewed-by: Hannes Reinecke <hare@suse.com> Tested-by: Michael Schmitz <schmitzmic@gmail.com> Tested-by: Ondrej Zary <linux@rainbow-software.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
324 lines
7.1 KiB
C
324 lines
7.1 KiB
C
/*
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* Generic Generic NCR5380 driver
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*
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* Copyright 1995-2002, Russell King
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*/
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#include <linux/module.h>
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#include <linux/ioport.h>
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#include <linux/blkdev.h>
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#include <linux/init.h>
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#include <asm/ecard.h>
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#include <asm/io.h>
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#include <scsi/scsi_host.h>
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#define PSEUDO_DMA
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#define priv(host) ((struct NCR5380_hostdata *)(host)->hostdata)
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#define NCR5380_read(reg) cumanascsi_read(instance, reg)
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#define NCR5380_write(reg, value) cumanascsi_write(instance, reg, value)
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#define NCR5380_dma_xfer_len(instance, cmd, phase) (cmd->transfersize)
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#define NCR5380_intr cumanascsi_intr
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#define NCR5380_queue_command cumanascsi_queue_command
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#define NCR5380_info cumanascsi_info
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#define NCR5380_implementation_fields \
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unsigned ctrl; \
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void __iomem *base; \
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void __iomem *dma
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#include "../NCR5380.h"
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void cumanascsi_setup(char *str, int *ints)
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{
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}
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#define CTRL 0x16fc
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#define STAT 0x2004
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#define L(v) (((v)<<16)|((v) & 0x0000ffff))
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#define H(v) (((v)>>16)|((v) & 0xffff0000))
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static inline int
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NCR5380_pwrite(struct Scsi_Host *host, unsigned char *addr, int len)
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{
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unsigned long *laddr;
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void __iomem *dma = priv(host)->dma + 0x2000;
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if(!len) return 0;
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writeb(0x02, priv(host)->base + CTRL);
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laddr = (unsigned long *)addr;
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while(len >= 32)
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{
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unsigned int status;
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unsigned long v;
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status = readb(priv(host)->base + STAT);
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if(status & 0x80)
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goto end;
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if(!(status & 0x40))
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continue;
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v=*laddr++; writew(L(v), dma); writew(H(v), dma);
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v=*laddr++; writew(L(v), dma); writew(H(v), dma);
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v=*laddr++; writew(L(v), dma); writew(H(v), dma);
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v=*laddr++; writew(L(v), dma); writew(H(v), dma);
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v=*laddr++; writew(L(v), dma); writew(H(v), dma);
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v=*laddr++; writew(L(v), dma); writew(H(v), dma);
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v=*laddr++; writew(L(v), dma); writew(H(v), dma);
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v=*laddr++; writew(L(v), dma); writew(H(v), dma);
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len -= 32;
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if(len == 0)
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break;
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}
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addr = (unsigned char *)laddr;
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writeb(0x12, priv(host)->base + CTRL);
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while(len > 0)
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{
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unsigned int status;
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status = readb(priv(host)->base + STAT);
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if(status & 0x80)
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goto end;
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if(status & 0x40)
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{
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writeb(*addr++, dma);
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if(--len == 0)
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break;
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}
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status = readb(priv(host)->base + STAT);
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if(status & 0x80)
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goto end;
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if(status & 0x40)
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{
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writeb(*addr++, dma);
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if(--len == 0)
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break;
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}
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}
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end:
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writeb(priv(host)->ctrl | 0x40, priv(host)->base + CTRL);
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return len;
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}
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static inline int
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NCR5380_pread(struct Scsi_Host *host, unsigned char *addr, int len)
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{
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unsigned long *laddr;
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void __iomem *dma = priv(host)->dma + 0x2000;
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if(!len) return 0;
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writeb(0x00, priv(host)->base + CTRL);
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laddr = (unsigned long *)addr;
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while(len >= 32)
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{
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unsigned int status;
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status = readb(priv(host)->base + STAT);
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if(status & 0x80)
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goto end;
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if(!(status & 0x40))
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continue;
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*laddr++ = readw(dma) | (readw(dma) << 16);
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*laddr++ = readw(dma) | (readw(dma) << 16);
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*laddr++ = readw(dma) | (readw(dma) << 16);
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*laddr++ = readw(dma) | (readw(dma) << 16);
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*laddr++ = readw(dma) | (readw(dma) << 16);
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*laddr++ = readw(dma) | (readw(dma) << 16);
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*laddr++ = readw(dma) | (readw(dma) << 16);
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*laddr++ = readw(dma) | (readw(dma) << 16);
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len -= 32;
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if(len == 0)
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break;
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}
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addr = (unsigned char *)laddr;
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writeb(0x10, priv(host)->base + CTRL);
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while(len > 0)
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{
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unsigned int status;
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status = readb(priv(host)->base + STAT);
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if(status & 0x80)
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goto end;
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if(status & 0x40)
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{
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*addr++ = readb(dma);
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if(--len == 0)
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break;
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}
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status = readb(priv(host)->base + STAT);
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if(status & 0x80)
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goto end;
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if(status & 0x40)
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{
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*addr++ = readb(dma);
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if(--len == 0)
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break;
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}
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}
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end:
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writeb(priv(host)->ctrl | 0x40, priv(host)->base + CTRL);
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return len;
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}
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static unsigned char cumanascsi_read(struct Scsi_Host *host, unsigned int reg)
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{
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void __iomem *base = priv(host)->base;
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unsigned char val;
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writeb(0, base + CTRL);
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val = readb(base + 0x2100 + (reg << 2));
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priv(host)->ctrl = 0x40;
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writeb(0x40, base + CTRL);
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return val;
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}
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static void cumanascsi_write(struct Scsi_Host *host, unsigned int reg, unsigned int value)
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{
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void __iomem *base = priv(host)->base;
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writeb(0, base + CTRL);
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writeb(value, base + 0x2100 + (reg << 2));
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priv(host)->ctrl = 0x40;
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writeb(0x40, base + CTRL);
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}
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#include "../NCR5380.c"
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static struct scsi_host_template cumanascsi_template = {
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.module = THIS_MODULE,
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.name = "Cumana 16-bit SCSI",
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.info = cumanascsi_info,
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.queuecommand = cumanascsi_queue_command,
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.eh_abort_handler = NCR5380_abort,
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.eh_bus_reset_handler = NCR5380_bus_reset,
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.can_queue = 16,
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.this_id = 7,
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.sg_tablesize = SG_ALL,
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.cmd_per_lun = 2,
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.use_clustering = DISABLE_CLUSTERING,
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.proc_name = "CumanaSCSI-1",
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.cmd_size = NCR5380_CMD_SIZE,
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.max_sectors = 128,
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};
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static int cumanascsi1_probe(struct expansion_card *ec,
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const struct ecard_id *id)
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{
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struct Scsi_Host *host;
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int ret;
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ret = ecard_request_resources(ec);
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if (ret)
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goto out;
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host = scsi_host_alloc(&cumanascsi_template, sizeof(struct NCR5380_hostdata));
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if (!host) {
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ret = -ENOMEM;
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goto out_release;
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}
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priv(host)->base = ioremap(ecard_resource_start(ec, ECARD_RES_IOCSLOW),
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ecard_resource_len(ec, ECARD_RES_IOCSLOW));
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priv(host)->dma = ioremap(ecard_resource_start(ec, ECARD_RES_MEMC),
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ecard_resource_len(ec, ECARD_RES_MEMC));
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if (!priv(host)->base || !priv(host)->dma) {
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ret = -ENOMEM;
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goto out_unmap;
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}
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host->irq = ec->irq;
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ret = NCR5380_init(host, FLAG_DMA_FIXUP);
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if (ret)
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goto out_unmap;
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NCR5380_maybe_reset_bus(host);
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priv(host)->ctrl = 0;
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writeb(0, priv(host)->base + CTRL);
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ret = request_irq(host->irq, cumanascsi_intr, 0,
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"CumanaSCSI-1", host);
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if (ret) {
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printk("scsi%d: IRQ%d not free: %d\n",
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host->host_no, host->irq, ret);
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goto out_exit;
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}
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ret = scsi_add_host(host, &ec->dev);
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if (ret)
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goto out_free_irq;
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scsi_scan_host(host);
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goto out;
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out_free_irq:
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free_irq(host->irq, host);
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out_exit:
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NCR5380_exit(host);
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out_unmap:
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iounmap(priv(host)->base);
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iounmap(priv(host)->dma);
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scsi_host_put(host);
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out_release:
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ecard_release_resources(ec);
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out:
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return ret;
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}
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static void cumanascsi1_remove(struct expansion_card *ec)
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{
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struct Scsi_Host *host = ecard_get_drvdata(ec);
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ecard_set_drvdata(ec, NULL);
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scsi_remove_host(host);
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free_irq(host->irq, host);
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NCR5380_exit(host);
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iounmap(priv(host)->base);
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iounmap(priv(host)->dma);
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scsi_host_put(host);
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ecard_release_resources(ec);
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}
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static const struct ecard_id cumanascsi1_cids[] = {
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{ MANU_CUMANA, PROD_CUMANA_SCSI_1 },
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{ 0xffff, 0xffff }
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};
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static struct ecard_driver cumanascsi1_driver = {
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.probe = cumanascsi1_probe,
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.remove = cumanascsi1_remove,
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.id_table = cumanascsi1_cids,
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.drv = {
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.name = "cumanascsi1",
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},
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};
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static int __init cumanascsi_init(void)
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{
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return ecard_register_driver(&cumanascsi1_driver);
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}
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static void __exit cumanascsi_exit(void)
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{
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ecard_remove_driver(&cumanascsi1_driver);
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}
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module_init(cumanascsi_init);
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module_exit(cumanascsi_exit);
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MODULE_DESCRIPTION("Cumana SCSI-1 driver for Acorn machines");
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MODULE_LICENSE("GPL");
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