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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>
Signed-off-by: Kevin Hilman <khilman@ti.deeprootsystems.com>
hifive-unleashed-5.1
Kalle Jokiniemi 2009-06-23 13:30:24 +03:00 committed by Tony Lindgren
parent 5b0acc59d1
commit aecedb94b3
2 changed files with 28 additions and 0 deletions
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13
arch/arm/plat-omap/dma.c
View File

@ -2457,6 +2457,19 @@ static int __init omap_init_dma(void)
setup_irq(irq, &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,

15
arch/arm/plat-omap/include/mach/dma.h
View File

@ -389,6 +389,21 @@
#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