{
struct nv_adma_port_priv *pp = ap->private_data;
void __iomem *mmio = pp->ctl_block;
- u16 tmp;
+ u16 tmp, status;
+ int count = 0;
if (pp->flags & NV_ADMA_PORT_REGISTER_MODE)
return;
+ status = readw(mmio + NV_ADMA_STAT);
+ while(!(status & NV_ADMA_STAT_IDLE) && count < 20) {
+ ndelay(50);
+ status = readw(mmio + NV_ADMA_STAT);
+ count++;
+ }
+ if(count == 20)
+ ata_port_printk(ap, KERN_WARNING,
+ "timeout waiting for ADMA IDLE, stat=0x%hx\n",
+ status);
+
tmp = readw(mmio + NV_ADMA_CTL);
writew(tmp & ~NV_ADMA_CTL_GO, mmio + NV_ADMA_CTL);
+ count = 0;
+ status = readw(mmio + NV_ADMA_STAT);
+ while(!(status & NV_ADMA_STAT_LEGACY) && count < 20) {
+ ndelay(50);
+ status = readw(mmio + NV_ADMA_STAT);
+ count++;
+ }
+ if(count == 20)
+ ata_port_printk(ap, KERN_WARNING,
+ "timeout waiting for ADMA LEGACY, stat=0x%hx\n",
+ status);
+
pp->flags |= NV_ADMA_PORT_REGISTER_MODE;
}
{
struct nv_adma_port_priv *pp = ap->private_data;
void __iomem *mmio = pp->ctl_block;
- u16 tmp;
+ u16 tmp, status;
+ int count = 0;
if (!(pp->flags & NV_ADMA_PORT_REGISTER_MODE))
return;
tmp = readw(mmio + NV_ADMA_CTL);
writew(tmp | NV_ADMA_CTL_GO, mmio + NV_ADMA_CTL);
+ status = readw(mmio + NV_ADMA_STAT);
+ while(((status & NV_ADMA_STAT_LEGACY) ||
+ !(status & NV_ADMA_STAT_IDLE)) && count < 20) {
+ ndelay(50);
+ status = readw(mmio + NV_ADMA_STAT);
+ count++;
+ }
+ if(count == 20)
+ ata_port_printk(ap, KERN_WARNING,
+ "timeout waiting for ADMA LEGACY clear and IDLE, stat=0x%hx\n",
+ status);
+
pp->flags &= ~NV_ADMA_PORT_REGISTER_MODE;
}
cpb->next_aprd = cpu_to_le64(((u64)(pp->aprd_dma + NV_ADMA_SGTBL_SZ * qc->tag)));
}
+static int nv_adma_use_reg_mode(struct ata_queued_cmd *qc)
+{
+ struct nv_adma_port_priv *pp = qc->ap->private_data;
+
+ /* ADMA engine can only be used for non-ATAPI DMA commands,
+ or interrupt-driven no-data commands. */
+ if((pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE) ||
+ (qc->tf.flags & ATA_TFLAG_POLLING))
+ return 1;
+
+ if((qc->flags & ATA_QCFLAG_DMAMAP) ||
+ (qc->tf.protocol == ATA_PROT_NODATA))
+ return 0;
+
+ return 1;
+}
+
static void nv_adma_qc_prep(struct ata_queued_cmd *qc)
{
struct nv_adma_port_priv *pp = qc->ap->private_data;
struct nv_adma_cpb *cpb = &pp->cpb[qc->tag];
u8 ctl_flags = NV_CPB_CTL_CPB_VALID |
- NV_CPB_CTL_APRD_VALID |
NV_CPB_CTL_IEN;
- if (!(qc->flags & ATA_QCFLAG_DMAMAP) ||
- (pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE)) {
+ if (nv_adma_use_reg_mode(qc)) {
nv_adma_register_mode(qc->ap);
ata_qc_prep(qc);
return;
nv_adma_tf_to_cpb(&qc->tf, cpb->tf);
- nv_adma_fill_sg(qc, cpb);
+ if(qc->flags & ATA_QCFLAG_DMAMAP) {
+ nv_adma_fill_sg(qc, cpb);
+ ctl_flags |= NV_CPB_CTL_APRD_VALID;
+ } else
+ memset(&cpb->aprd[0], 0, sizeof(struct nv_adma_prd) * 5);
/* Be paranoid and don't let the device see NV_CPB_CTL_CPB_VALID until we are
finished filling in all of the contents */
VPRINTK("ENTER\n");
- if (!(qc->flags & ATA_QCFLAG_DMAMAP) ||
- (pp->flags & NV_ADMA_ATAPI_SETUP_COMPLETE)) {
+ if (nv_adma_use_reg_mode(qc)) {
/* use ATA register mode */
- VPRINTK("no dmamap or ATAPI, using ATA register mode: 0x%lx\n", qc->flags);
+ VPRINTK("using ATA register mode: 0x%lx\n", qc->flags);
nv_adma_register_mode(qc->ap);
return ata_qc_issue_prot(qc);
} else