sata: implement reset_sata for dwc_ahsata
Add reset_sata() to the sata driver interface and implement it
for dwc_ahsata. This function cleans up after sata_init(), and
therefore accepts a device number like sata_init() does.
A dummy implementation is provided for the rest of the drivers.
Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
Cc: Simon Glass <sjg@chromium.org>
Cc: Stefano Babic <sbabic@denx.de>
diff --git a/drivers/block/dwc_ahsata.c b/drivers/block/dwc_ahsata.c
index c68fd2f..9a2b547 100644
--- a/drivers/block/dwc_ahsata.c
+++ b/drivers/block/dwc_ahsata.c
@@ -592,6 +592,27 @@
return 0;
}
+int reset_sata(int dev)
+{
+ struct ahci_probe_ent *probe_ent =
+ (struct ahci_probe_ent *)sata_dev_desc[dev].priv;
+ struct sata_host_regs *host_mmio =
+ (struct sata_host_regs *)probe_ent->mmio_base;
+
+ if (dev < 0 || dev > (CONFIG_SYS_SATA_MAX_DEVICE - 1)) {
+ printf("The sata index %d is out of ranges\n\r", dev);
+ return -1;
+ }
+
+ setbits_le32(&host_mmio->ghc, SATA_HOST_GHC_HR);
+ while (readl(&host_mmio->ghc) & SATA_HOST_GHC_HR)
+ udelay(100);
+
+ disable_sata_clock();
+
+ return 0;
+}
+
static void dwc_ahsata_print_info(int dev)
{
block_dev_desc_t *pdev = &(sata_dev_desc[dev]);