diff options
Diffstat (limited to 'include/linux/libata.h')
| -rw-r--r-- | include/linux/libata.h | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/include/linux/libata.h b/include/linux/libata.h index b2fd0adbe5b6..c9713d0d30af 100644 --- a/include/linux/libata.h +++ b/include/linux/libata.h @@ -541,4 +541,44 @@ static inline unsigned int sata_dev_present(struct ata_port *ap) return ((scr_read(ap, SCR_STATUS) & 0xf) == 0x3) ? 1 : 0; } +static inline void ata_bmdma_stop(struct ata_port *ap) +{ + if (ap->flags & ATA_FLAG_MMIO) { + void *mmio = (void *) ap->ioaddr.bmdma_addr; + + /* clear start/stop bit */ + writeb(readb(mmio + ATA_DMA_CMD) & ~ATA_DMA_START, + mmio + ATA_DMA_CMD); + } else { + /* clear start/stop bit */ + outb(inb(ap->ioaddr.bmdma_addr + ATA_DMA_CMD) & ~ATA_DMA_START, + ap->ioaddr.bmdma_addr + ATA_DMA_CMD); + } + + /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */ + ata_altstatus(ap); /* dummy read */ +} + +static inline void ata_bmdma_ack_irq(struct ata_port *ap) +{ + if (ap->flags & ATA_FLAG_MMIO) { + void *mmio = ((void *) ap->ioaddr.bmdma_addr) + ATA_DMA_STATUS; + writeb(readb(mmio), mmio); + } else { + unsigned long addr = ap->ioaddr.bmdma_addr + ATA_DMA_STATUS; + outb(inb(addr), addr); + } +} + +static inline u8 ata_bmdma_status(struct ata_port *ap) +{ + u8 host_stat; + if (ap->flags & ATA_FLAG_MMIO) { + void *mmio = (void *) ap->ioaddr.bmdma_addr; + host_stat = readb(mmio + ATA_DMA_STATUS); + } else + host_stat = inb(ap->ioaddr.bmdma_addr + ATA_DMA_STATUS); + return host_stat; +} + #endif /* __LINUX_LIBATA_H__ */ |