karo: merge with Ka-Ro specific tree for secure boot support

[karo-tx-uboot.git] / drivers / block / dwc_ahsata.c

diff --git a/drivers/block/dwc_ahsata.c b/drivers/block/dwc_ahsata.c
index c68fd2f256541403a97f840599353dbadf7ec6df..01a4148a5201ebe4738fdd399d5354068e4c614c 100644 (file)
--- a/drivers/block/dwc_ahsata.c
+++ b/drivers/block/dwc_ahsata.c
@@ -592,6 +592,29 @@ int init_sata(int dev)
        return 0;
 }
 
+int reset_sata(int dev)
+{
+       struct ahci_probe_ent *probe_ent;
+       struct sata_host_regs *host_mmio;
+
+       if (dev < 0 || dev > (CONFIG_SYS_SATA_MAX_DEVICE - 1)) {
+               printf("The sata index %d is out of ranges\n\r", dev);
+               return -1;
+       }
+
+       probe_ent = (struct ahci_probe_ent *)sata_dev_desc[dev].priv;
+       if (NULL == probe_ent)
+               /* not initialized, so nothing to reset */
+               return 0;
+
+       host_mmio = (struct sata_host_regs *)probe_ent->mmio_base;
+       setbits_le32(&host_mmio->ghc, SATA_HOST_GHC_HR);
+       while (readl(&host_mmio->ghc) & SATA_HOST_GHC_HR)
+               udelay(100);
+
+       return 0;
+}
+
 static void dwc_ahsata_print_info(int dev)
 {
        block_dev_desc_t *pdev = &(sata_dev_desc[dev]);