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| author | Manuel Lauss <manuel.lauss@gmail.com> | 2014-02-20 14:59:23 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-03-26 23:09:21 +0100 |
| commit | 88e9a93c9d53ddcf633aa07f14245da7f30408c2 (patch) | |
| tree | 743667e5317873f87f82a430c71de90cd106b34a /arch/mips/alchemy | |
| parent | 8005711c8d80e452748e9572bead54493818f042 (diff) | |
| download | linux-88e9a93c9d53ddcf633aa07f14245da7f30408c2.tar.gz linux-88e9a93c9d53ddcf633aa07f14245da7f30408c2.tar.bz2 linux-88e9a93c9d53ddcf633aa07f14245da7f30408c2.zip | |
MIPS: Alchemy: Determine cohereny at runtime based on cpu type
All Alchemy chips have coherent DMA, but for example the USB or AC97
peripherals on the Au1000/1500/1100 are not.
This patch uses DMA_MAYBE_COHERENT on Alchemy and sets coherentio based
on CPU type.
Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Cc: Linux-MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/6576/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/alchemy')
| -rw-r--r-- | arch/mips/alchemy/Kconfig | 5 | ||||
| -rw-r--r-- | arch/mips/alchemy/common/setup.c | 10 |
2 files changed, 10 insertions, 5 deletions
diff --git a/arch/mips/alchemy/Kconfig b/arch/mips/alchemy/Kconfig index 7032ac7ecd1b..41386723f9fa 100644 --- a/arch/mips/alchemy/Kconfig +++ b/arch/mips/alchemy/Kconfig @@ -20,7 +20,6 @@ choice config MIPS_MTX1 bool "4G Systems MTX-1 board" - select DMA_NONCOHERENT select HW_HAS_PCI select ALCHEMY_GPIOINT_AU1000 select SYS_SUPPORTS_LITTLE_ENDIAN @@ -29,7 +28,6 @@ config MIPS_MTX1 config MIPS_DB1000 bool "Alchemy DB1000/DB1500/DB1100 PB1500/1100 boards" select ALCHEMY_GPIOINT_AU1000 - select DMA_NONCOHERENT select HW_HAS_PCI select SYS_SUPPORTS_BIG_ENDIAN select SYS_SUPPORTS_LITTLE_ENDIAN @@ -39,13 +37,11 @@ config MIPS_DB1235 bool "Alchemy DB1200/PB1200/DB1300/DB1550/PB1550 boards" select ARCH_REQUIRE_GPIOLIB select HW_HAS_PCI - select DMA_COHERENT select SYS_SUPPORTS_LITTLE_ENDIAN select SYS_HAS_EARLY_PRINTK config MIPS_XXS1500 bool "MyCable XXS1500 board" - select DMA_NONCOHERENT select ALCHEMY_GPIOINT_AU1000 select SYS_SUPPORTS_LITTLE_ENDIAN select SYS_HAS_EARLY_PRINTK @@ -54,7 +50,6 @@ config MIPS_GPR bool "Trapeze ITS GPR board" select ALCHEMY_GPIOINT_AU1000 select HW_HAS_PCI - select DMA_NONCOHERENT select SYS_SUPPORTS_LITTLE_ENDIAN select SYS_HAS_EARLY_PRINTK diff --git a/arch/mips/alchemy/common/setup.c b/arch/mips/alchemy/common/setup.c index 62b4e7bbeab9..566a1743f685 100644 --- a/arch/mips/alchemy/common/setup.c +++ b/arch/mips/alchemy/common/setup.c @@ -30,6 +30,7 @@ #include <linux/jiffies.h> #include <linux/module.h> +#include <asm/dma-coherence.h> #include <asm/mipsregs.h> #include <asm/time.h> @@ -59,6 +60,15 @@ void __init plat_mem_setup(void) /* Clear to obtain best system bus performance */ clear_c0_config(1 << 19); /* Clear Config[OD] */ + hw_coherentio = 0; + coherentio = 1; + switch (alchemy_get_cputype()) { + case ALCHEMY_CPU_AU1000: + case ALCHEMY_CPU_AU1500: + case ALCHEMY_CPU_AU1100: + coherentio = 0; + } + board_setup(); /* board specific setup */ /* IO/MEM resources. */ |