X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=drivers%2Fblock%2Fahci.c;h=c908fab4506e5c6400dc91150cbc23234c0ed9e3;hb=7682a99826a624d3764656b5bb31f88e2f8b235b;hp=c9a3beb79b2368d96905160052cbec38003ea2cb;hpb=21008ad6384170767041f1608975473c5ffa7fc7;p=u-boot

diff --git a/drivers/block/ahci.c b/drivers/block/ahci.c
index c9a3beb79b..c908fab450 100644
--- a/drivers/block/ahci.c
+++ b/drivers/block/ahci.c
@@ -137,6 +137,33 @@ static void sunxi_dma_init(volatile u8 *port_mmio)
 }
 #endif
 
+int ahci_reset(u32 base)
+{
+	int i = 1000;
+	u32 host_ctl_reg = base + HOST_CTL;
+	u32 tmp = readl(host_ctl_reg); /* global controller reset */
+
+	if ((tmp & HOST_RESET) == 0)
+		writel_with_flush(tmp | HOST_RESET, host_ctl_reg);
+
+	/*
+	 * reset must complete within 1 second, or
+	 * the hardware should be considered fried.
+	 */
+	do {
+		udelay(1000);
+		tmp = readl(host_ctl_reg);
+		i--;
+	} while ((i > 0) && (tmp & HOST_RESET));
+
+	if (i == 0) {
+		printf("controller reset failed (0x%x)\n", tmp);
+		return -1;
+	}
+
+	return 0;
+}
+
 static int ahci_host_init(struct ahci_probe_ent *probe_ent)
 {
 #ifndef CONFIG_SCSI_AHCI_PLAT
@@ -156,23 +183,9 @@ static int ahci_host_init(struct ahci_probe_ent *probe_ent)
 	cap_save &= ((1 << 28) | (1 << 17));
 	cap_save |= (1 << 27);  /* Staggered Spin-up. Not needed. */
 
-	/* global controller reset */
-	tmp = readl(mmio + HOST_CTL);
-	if ((tmp & HOST_RESET) == 0)
-		writel_with_flush(tmp | HOST_RESET, mmio + HOST_CTL);
-
-	/* reset must complete within 1 second, or
-	 * the hardware should be considered fried.
-	 */
-	i = 1000;
-	do {
-		udelay(1000);
-		tmp = readl(mmio + HOST_CTL);
-		if (!i--) {
-			debug("controller reset failed (0x%x)\n", tmp);
-			return -1;
-		}
-	} while (tmp & HOST_RESET);
+	ret = ahci_reset(probe_ent->mmio_base);
+	if (ret)
+		return ret;
 
 	writel_with_flush(HOST_AHCI_EN, mmio + HOST_CTL);
 	writel(cap_save, mmio + HOST_CAP);
@@ -500,6 +513,20 @@ static void ahci_set_feature(u8 port)
 }
 #endif
 
+static int wait_spinup(volatile u8 *port_mmio)
+{
+	ulong start;
+	u32 tf_data;
+
+	start = get_timer(0);
+	do {
+		tf_data = readl(port_mmio + PORT_TFDATA);
+		if (!(tf_data & ATA_BUSY))
+			return 0;
+	} while (get_timer(start) < WAIT_MS_SPINUP);
+
+	return -ETIMEDOUT;
+}
 
 static int ahci_port_start(u8 port)
 {
@@ -566,7 +593,11 @@ static int ahci_port_start(u8 port)
 
 	debug("Exit start port %d\n", port);
 
-	return 0;
+	/*
+	 * Make sure interface is not busy based on error and status
+	 * information from task file data register before proceeding
+	 */
+	return wait_spinup(port_mmio);
 }
 
 
@@ -997,12 +1028,11 @@ static int ata_io_flush(u8 port)
 }
 
 
-void scsi_bus_reset(void)
+__weak void scsi_bus_reset(void)
 {
 	/*Not implement*/
 }
 
-
 void scsi_print_error(ccb * pccb)
 {
 	/*The ahci error info can be read in the ahci driver*/