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ahci: provide sunxi SATA driver using AHCI platform framework

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This enables the necessary clocks, in AHB0 and in PLL6_CFG. This is done
for sun7i only since I don't have access to any other sunxi platforms
with sata included.

The PHY setup is derived from the Alwinner releases and Linux, but is mostly
undocumented.

The Allwinner AHCI controller also requires some magic (and, again,
undocumented) DMA initialisation when starting a port.  This is added under a
suitable ifdef.

This option is enabled for Cubieboard, Cubieboard2 and Cubietruck based on
contents of Linux DTS files, including SATA power pin config taken from the
DTS. All build tested, but runtime tested on Cubieboard2 and Cubietruck only.

Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Ian Campbell 2014-07-18 20:38:41 +01:00 • committed by Hans de Goede
parent 25b4adbba0
commit a6e50a88d8
12 changed files with 133 additions and 9 deletions
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4
include/ahci.h
View file

@ -58,6 +58,10 @@
#define PORT_SCR_ERR 0x30 /* SATA phy register: SError */
#define PORT_SCR_ACT 0x34 /* SATA phy register: SActive */
#ifdef CONFIG_SUNXI_AHCI
#define PORT_P0DMACR 0x70 /* SUNXI specific "DMA register" */
#endif
/* PORT_IRQ_{STAT,MASK} bits */
#define PORT_IRQ_COLD_PRES (1 << 31) /* cold presence detect */
#define PORT_IRQ_TF_ERR (1 << 30) /* task file error */