OMAP3: DMA: Enable idlemodes for DMA OCP

This patch enables MStandby smart-idle mode, autoidle smartidle mode,
and the autoidle bit for DMA4_OCP_SYSCONFIG.

Signed-off-by: Kalle Jokiniemi <ext-kalle.jokiniemi@nokia.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index c4e5ba3ef58585c8d323dd7689ba651bcb84e6bc..9d8d28ca3f3e854819f9be0b7b32fb4d8070c1d6 100644 (file)
--- a/arch/arm/plat-omap/dma.c
+++ b/arch/arm/plat-omap/dma.c
@@ -2420,6 +2420,19 @@ static int __init omap_init_dma(void)
        if (cpu_class_is_omap2())
                setup_irq(INT_24XX_SDMA_IRQ0, &omap24xx_dma_irq);
 
+       /* Enable smartidle idlemodes and autoidle */
+       if (cpu_is_omap34xx()) {
+               u32 v = dma_read(OCP_SYSCONFIG);
+               v &= ~(DMA_SYSCONFIG_MIDLEMODE_MASK |
+                               DMA_SYSCONFIG_SIDLEMODE_MASK |
+                               DMA_SYSCONFIG_AUTOIDLE);
+               v |= (DMA_SYSCONFIG_MIDLEMODE(DMA_IDLEMODE_SMARTIDLE) |
+                       DMA_SYSCONFIG_SIDLEMODE(DMA_IDLEMODE_SMARTIDLE) |
+                       DMA_SYSCONFIG_AUTOIDLE);
+               dma_write(v , OCP_SYSCONFIG);
+       }
+
+
        /* FIXME: Update LCD DMA to work on 24xx */
        if (cpu_class_is_omap1()) {
                r = request_irq(INT_DMA_LCD, lcd_dma_irq_handler, 0,

diff --git a/arch/arm/plat-omap/include/mach/dma.h b/arch/arm/plat-omap/include/mach/dma.h
index 54fe9665b1826f674b761685d443f54c48567864..224b0770ec2dcd41e461aadf49df797731153f30 100644 (file)
--- a/arch/arm/plat-omap/include/mach/dma.h
+++ b/arch/arm/plat-omap/include/mach/dma.h
@@ -387,6 +387,21 @@
 #define DMA_THREAD_FIFO_25             (0x02 << 14)
 #define DMA_THREAD_FIFO_50             (0x03 << 14)
 
+/* DMA4_OCP_SYSCONFIG bits */
+#define DMA_SYSCONFIG_MIDLEMODE_MASK           (3 << 12)
+#define DMA_SYSCONFIG_CLOCKACTIVITY_MASK       (3 << 8)
+#define DMA_SYSCONFIG_EMUFREE                  (1 << 5)
+#define DMA_SYSCONFIG_SIDLEMODE_MASK           (3 << 3)
+#define DMA_SYSCONFIG_SOFTRESET                        (1 << 2)
+#define DMA_SYSCONFIG_AUTOIDLE                 (1 << 0)
+
+#define DMA_SYSCONFIG_MIDLEMODE(n)             ((n) << 12)
+#define DMA_SYSCONFIG_SIDLEMODE(n)             ((n) << 3)
+
+#define DMA_IDLEMODE_SMARTIDLE                 0x2
+#define DMA_IDLEMODE_NO_IDLE                   0x1
+#define DMA_IDLEMODE_FORCE_IDLE                        0x0
+
 /* Chaining modes*/
 #ifndef CONFIG_ARCH_OMAP1
 #define OMAP_DMA_STATIC_CHAIN          0x1