static int macscsi_pwrite (struct Scsi_Host *instance,
unsigned char *src, int len)
{
unsigned char *s;
volatile unsigned char *d;
NCR5380_local_declare();
NCR5380_setup(instance);
s = src;
d = mac_scsi_drq;
/* These conditions are derived from MacOS */
while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ)
&& (!(NCR5380_read(STATUS_REG) & SR_REQ)
|| (NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH)))
;
if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ)) {
printk(KERN_ERR "Error in macscsi_pwrite\n");
return -1;
}
CP_MEM_TO_IO(s, d, len);
if (len != 0) {
printk(KERN_NOTICE "Bus error in macscsi_pwrite\n");
return -1;
}
return 0;
}
static int macscsi_pwrite(struct Scsi_Host *instance,
unsigned char *src, int len)
{
struct NCR5380_hostdata *hostdata = shost_priv(instance);
unsigned char *s;
unsigned char *d;
NCR5380_local_declare();
NCR5380_setup(instance);
s = src;
d = hostdata->pdma_base + (OUTPUT_DATA_REG << 4);
/* These conditions are derived from MacOS */
while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) &&
(!(NCR5380_read(STATUS_REG) & SR_REQ) ||
(NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH)))
;
if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ)) {
pr_err("Error in macscsi_pwrite\n");
return -1;
}
CP_MEM_TO_IO(s, d, len);
if (len != 0) {
pr_notice("Bus error in macscsi_pwrite\n");
return -1;
}
return 0;
}
static inline int macscsi_pwrite(struct NCR5380_hostdata *hostdata,
unsigned char *src, int len)
{
unsigned char *s = src;
unsigned char *d = hostdata->pdma_io + (OUTPUT_DATA_REG << 4);
int n = len;
int transferred;
while (!NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG,
BASR_DRQ | BASR_PHASE_MATCH,
BASR_DRQ | BASR_PHASE_MATCH, HZ / 64)) {
CP_MEM_TO_IO(s, d, n);
transferred = s - src - n;
hostdata->pdma_residual = len - transferred;
/* Target changed phase early? */
if (NCR5380_poll_politely2(hostdata, STATUS_REG, SR_REQ, SR_REQ,
BUS_AND_STATUS_REG, BASR_ACK, BASR_ACK, HZ / 64) < 0)
scmd_printk(KERN_ERR, hostdata->connected,
"%s: !REQ and !ACK\n", __func__);
if (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH))
return 0;
/* No bus error. */
if (n == 0) {
if (NCR5380_poll_politely(hostdata, TARGET_COMMAND_REG,
TCR_LAST_BYTE_SENT,
TCR_LAST_BYTE_SENT, HZ / 64) < 0)
scmd_printk(KERN_ERR, hostdata->connected,
"%s: Last Byte Sent timeout\n", __func__);
return 0;
}
dsprintk(NDEBUG_PSEUDO_DMA, hostdata->host,
"%s: bus error (%d/%d)\n", __func__, transferred, len);
NCR5380_dprint(NDEBUG_PSEUDO_DMA, hostdata->host);
s = src + transferred;
n = len - transferred;
}
scmd_printk(KERN_ERR, hostdata->connected,
"%s: phase mismatch or !DRQ\n", __func__);
NCR5380_dprint(NDEBUG_PSEUDO_DMA, hostdata->host);
return -1;
}
