sunxi: initial 3.13 support

Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>

SVN-Revision: 39471

1 files changed, 53 insertions, 0 deletions

diff --git a/target/linux/sunxi/patches-3.13/160-ahci-add-pre-start-hook.patch b/target/linux/sunxi/patches-3.13/160-ahci-add-pre-start-hook.patch
new file mode 100644
index 0000000..342c114
--- /dev/null
+++ b/target/linux/sunxi/patches-3.13/160-ahci-add-pre-start-hook.patch
@@ -0,0 +1,53 @@
+From 3eec76bc21d78e56ac8404b59f29dd9dbbd1528a Mon Sep 17 00:00:00 2001
+From: Oliver Schinagl <oliver@schinagl.nl>
+Date: Mon, 2 Dec 2013 16:13:32 +0100
+Subject: [PATCH] libahci: Add a pre ahci_start_engine hook
+
+Allwinner A10 and A20 ARM SoCs have an AHCI sata controller which need a
+special register to be poked before starting the DMA engine.
+
+This register gets reset on an ahci_stop_engine call, so there is no other
+place then ahci_start_engine where this poking can be done.
+
+This commit adds a pre ahci_start_engine hook for use by the Allwinner AHCI
+driver (and potentially other drivers in the future).
+
+Signed-off-by: Hans de Goede <hdegoede@redhat.com>
+---
+ drivers/ata/ahci.h    | 2 ++
+ drivers/ata/libahci.c | 4 ++++
+ 2 files changed, 6 insertions(+)
+
+diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
+index 2289efd..1bba479 100644
+--- a/drivers/ata/ahci.h
++++ b/drivers/ata/ahci.h
+@@ -323,6 +323,8 @@ struct ahci_host_priv {
+ 	u32			em_msg_type;	/* EM message type */
+ 	struct clk		*clk;		/* Only for platforms supporting clk */
+ 	void			*plat_data;	/* Other platform data */
++	/* Optional pre ahci_start_engine hook */
++	void			(*pre_start_engine)(struct ata_port *ap);
+ };
+ 
+ extern int ahci_ignore_sss;
+diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
+index c482f8c..780e9df 100644
+--- a/drivers/ata/libahci.c
++++ b/drivers/ata/libahci.c
+@@ -568,8 +568,12 @@ static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
+ void ahci_start_engine(struct ata_port *ap)
+ {
+ 	void __iomem *port_mmio = ahci_port_base(ap);
++	struct ahci_host_priv *hpriv = ap->host->private_data;
+ 	u32 tmp;
+ 
++	if (hpriv->pre_start_engine)
++		hpriv->pre_start_engine(ap);
++
+ 	/* start DMA */
+ 	tmp = readl(port_mmio + PORT_CMD);
+ 	tmp |= PORT_CMD_START;
+-- 
+1.8.5.1
+