diff options
Diffstat (limited to 'arch/arm/mach-tegra')
| -rw-r--r-- | arch/arm/mach-tegra/Makefile | 3 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/apbio.c | 59 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/apbio.h | 19 | ||||
| -rw-r--r-- | arch/arm/mach-tegra/common.c | 3 |
4 files changed, 60 insertions, 24 deletions
diff --git a/arch/arm/mach-tegra/Makefile b/arch/arm/mach-tegra/Makefile index 2eb4445..e9f48ec 100644 --- a/arch/arm/mach-tegra/Makefile +++ b/arch/arm/mach-tegra/Makefile @@ -8,6 +8,7 @@ obj-y += timer.o obj-y += fuse.o obj-y += pmc.o obj-y += flowctrl.o +obj-y += apbio.o obj-$(CONFIG_CPU_IDLE) += cpuidle.o obj-$(CONFIG_CPU_IDLE) += sleep.o obj-$(CONFIG_ARCH_TEGRA_2x_SOC) += powergate.o @@ -18,7 +19,7 @@ obj-$(CONFIG_ARCH_TEGRA_3x_SOC) += tegra30_clocks.o obj-$(CONFIG_SMP) += platsmp.o headsmp.o obj-$(CONFIG_SMP) += reset.o obj-$(CONFIG_HOTPLUG_CPU) += hotplug.o -obj-$(CONFIG_TEGRA_SYSTEM_DMA) += dma.o apbio.o +obj-$(CONFIG_TEGRA_SYSTEM_DMA) += dma.o obj-$(CONFIG_CPU_FREQ) += cpu-tegra.o obj-$(CONFIG_TEGRA_PCI) += pcie.o obj-$(CONFIG_USB_SUPPORT) += usb_phy.o diff --git a/arch/arm/mach-tegra/apbio.c b/arch/arm/mach-tegra/apbio.c index e75451e..74ac0db 100644 --- a/arch/arm/mach-tegra/apbio.c +++ b/arch/arm/mach-tegra/apbio.c @@ -15,6 +15,10 @@ #include <linux/kernel.h> #include <linux/io.h> +#include <mach/iomap.h> +#include <linux/of.h> + +#ifdef CONFIG_TEGRA_SYSTEM_DMA #include <linux/dma-mapping.h> #include <linux/spinlock.h> #include <linux/completion.h> @@ -22,7 +26,6 @@ #include <linux/mutex.h> #include <mach/dma.h> -#include <mach/iomap.h> #include "apbio.h" @@ -33,6 +36,9 @@ static u32 *tegra_apb_bb; static dma_addr_t tegra_apb_bb_phys; static DECLARE_COMPLETION(tegra_apb_wait); +static u32 tegra_apb_readl_direct(unsigned long offset); +static void tegra_apb_writel_direct(u32 value, unsigned long offset); + bool tegra_apb_init(void) { struct tegra_dma_channel *ch; @@ -72,13 +78,13 @@ static void apb_dma_complete(struct tegra_dma_req *req) complete(&tegra_apb_wait); } -u32 tegra_apb_readl(unsigned long offset) +static u32 tegra_apb_readl_using_dma(unsigned long offset) { struct tegra_dma_req req; int ret; if (!tegra_apb_dma && !tegra_apb_init()) - return readl(IO_TO_VIRT(offset)); + return tegra_apb_readl_direct(offset); mutex_lock(&tegra_apb_dma_lock); req.complete = apb_dma_complete; @@ -108,13 +114,13 @@ u32 tegra_apb_readl(unsigned long offset) return *((u32 *)tegra_apb_bb); } -void tegra_apb_writel(u32 value, unsigned long offset) +static void tegra_apb_writel_using_dma(u32 value, unsigned long offset) { struct tegra_dma_req req; int ret; if (!tegra_apb_dma && !tegra_apb_init()) { - writel(value, IO_TO_VIRT(offset)); + tegra_apb_writel_direct(value, offset); return; } @@ -143,3 +149,46 @@ void tegra_apb_writel(u32 value, unsigned long offset) mutex_unlock(&tegra_apb_dma_lock); } +#else +#define tegra_apb_readl_using_dma tegra_apb_readl_direct +#define tegra_apb_writel_using_dma tegra_apb_writel_direct +#endif + +typedef u32 (*apbio_read_fptr)(unsigned long offset); +typedef void (*apbio_write_fptr)(u32 value, unsigned long offset); + +static apbio_read_fptr apbio_read; +static apbio_write_fptr apbio_write; + +static u32 tegra_apb_readl_direct(unsigned long offset) +{ + return readl(IO_TO_VIRT(offset)); +} + +static void tegra_apb_writel_direct(u32 value, unsigned long offset) +{ + writel(value, IO_TO_VIRT(offset)); +} + +void tegra_apb_io_init(void) +{ + /* Need to use dma only when it is Tegra20 based platform */ + if (of_machine_is_compatible("nvidia,tegra20") || + !of_have_populated_dt()) { + apbio_read = tegra_apb_readl_using_dma; + apbio_write = tegra_apb_writel_using_dma; + } else { + apbio_read = tegra_apb_readl_direct; + apbio_write = tegra_apb_writel_direct; + } +} + +u32 tegra_apb_readl(unsigned long offset) +{ + return apbio_read(offset); +} + +void tegra_apb_writel(u32 value, unsigned long offset) +{ + apbio_write(value, offset); +} diff --git a/arch/arm/mach-tegra/apbio.h b/arch/arm/mach-tegra/apbio.h index 8b49e8c..f05d71c 100644 --- a/arch/arm/mach-tegra/apbio.h +++ b/arch/arm/mach-tegra/apbio.h @@ -16,24 +16,7 @@ #ifndef __MACH_TEGRA_APBIO_H #define __MACH_TEGRA_APBIO_H -#ifdef CONFIG_TEGRA_SYSTEM_DMA - +void tegra_apb_io_init(void); u32 tegra_apb_readl(unsigned long offset); void tegra_apb_writel(u32 value, unsigned long offset); - -#else -#include <asm/io.h> -#include <mach/io.h> - -static inline u32 tegra_apb_readl(unsigned long offset) -{ - return readl(IO_TO_VIRT(offset)); -} - -static inline void tegra_apb_writel(u32 value, unsigned long offset) -{ - writel(value, IO_TO_VIRT(offset)); -} -#endif - #endif diff --git a/arch/arm/mach-tegra/common.c b/arch/arm/mach-tegra/common.c index 204a5c8..96fef6b 100644 --- a/arch/arm/mach-tegra/common.c +++ b/arch/arm/mach-tegra/common.c @@ -33,6 +33,7 @@ #include "clock.h" #include "fuse.h" #include "pmc.h" +#include "apbio.h" /* * Storage for debug-macro.S's state. @@ -127,6 +128,7 @@ static void __init tegra_init_cache(u32 tag_latency, u32 data_latency) #ifdef CONFIG_ARCH_TEGRA_2x_SOC void __init tegra20_init_early(void) { + tegra_apb_io_init(); tegra_init_fuse(); tegra2_init_clocks(); tegra_clk_init_from_table(tegra20_clk_init_table); @@ -138,6 +140,7 @@ void __init tegra20_init_early(void) #ifdef CONFIG_ARCH_TEGRA_3x_SOC void __init tegra30_init_early(void) { + tegra_apb_io_init(); tegra_init_fuse(); tegra30_init_clocks(); tegra_clk_init_from_table(tegra30_clk_init_table); |
