diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-omap2/pm34xx.c | 3 | ||||
| -rw-r--r-- | arch/arm/plat-omap/dma.c | 39 | ||||
| -rw-r--r-- | arch/arm/plat-omap/include/plat/dma.h | 5 |
3 files changed, 47 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c index bab9b480a089..54fea79b1720 100644 --- a/arch/arm/mach-omap2/pm34xx.c +++ b/arch/arm/mach-omap2/pm34xx.c @@ -34,6 +34,7 @@ #include <plat/sdrc.h> #include <plat/prcm.h> #include <plat/gpmc.h> +#include <plat/dma.h> #include <asm/tlbflush.h> @@ -95,6 +96,7 @@ static void omap3_core_save_context(void) omap3_gpmc_save_context(); /* Save the system control module context, padconf already save above*/ omap3_control_save_context(); + omap_dma_global_context_save(); } static void omap3_core_restore_context(void) @@ -105,6 +107,7 @@ static void omap3_core_restore_context(void) omap3_gpmc_restore_context(); /* Restore the interrupt controller context */ omap_intc_restore_context(); + omap_dma_global_context_restore(); } /* diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c index 3edffde7f439..3105aaa95d75 100644 --- a/arch/arm/plat-omap/dma.c +++ b/arch/arm/plat-omap/dma.c @@ -54,6 +54,12 @@ enum { DMA_CHAIN_STARTED, DMA_CHAIN_NOTSTARTED }; static int enable_1510_mode; +static struct omap_dma_global_context_registers { + u32 dma_irqenable_l0; + u32 dma_ocp_sysconfig; + u32 dma_gcr; +} omap_dma_global_context; + struct omap_dma_lch { int next_lch; int dev_id; @@ -2341,6 +2347,39 @@ void omap_stop_lcd_dma(void) } EXPORT_SYMBOL(omap_stop_lcd_dma); +void omap_dma_global_context_save(void) +{ + omap_dma_global_context.dma_irqenable_l0 = + dma_read(IRQENABLE_L0); + omap_dma_global_context.dma_ocp_sysconfig = + dma_read(OCP_SYSCONFIG); + omap_dma_global_context.dma_gcr = dma_read(GCR); +} + +void omap_dma_global_context_restore(void) +{ + dma_write(0x2, OCP_SYSCONFIG); + while (!__raw_readl(omap_dma_base + OMAP_DMA4_SYSSTATUS)) + ; + dma_write(omap_dma_global_context.dma_gcr, GCR); + dma_write(omap_dma_global_context.dma_ocp_sysconfig, + OCP_SYSCONFIG); + dma_write(omap_dma_global_context.dma_irqenable_l0, + IRQENABLE_L0); +} + +void omap_dma_disable_irq(int lch) +{ + u32 val; + + if (cpu_class_is_omap2()) { + /* Disable interrupts */ + val = dma_read(IRQENABLE_L0); + val &= ~(1 << lch); + dma_write(val, IRQENABLE_L0); + } +} + /*----------------------------------------------------------------------------*/ static int __init omap_init_dma(void) diff --git a/arch/arm/plat-omap/include/plat/dma.h b/arch/arm/plat-omap/include/plat/dma.h index 72f680b7180d..1c017b29b7e9 100644 --- a/arch/arm/plat-omap/include/plat/dma.h +++ b/arch/arm/plat-omap/include/plat/dma.h @@ -633,6 +633,11 @@ extern void omap_set_dma_dst_endian_type(int lch, enum end_type etype); extern void omap_set_dma_src_endian_type(int lch, enum end_type etype); extern int omap_get_dma_index(int lch, int *ei, int *fi); +void omap_dma_global_context_save(void); +void omap_dma_global_context_restore(void); + +extern void omap_dma_disable_irq(int lch); + /* Chaining APIs */ #ifndef CONFIG_ARCH_OMAP1 extern int omap_request_dma_chain(int dev_id, const char *dev_name, |