* linux/arch/arm/plat-omap/dma.c
*
* Copyright (C) 2003 Nokia Corporation
- * Author: Juha Yrjölä <juha.yrjola@nokia.com>
+ * Author: Juha Yrjölä <juha.yrjola@nokia.com>
* DMA channel linking for 1610 by Samuel Ortiz <samuel.ortiz@nokia.com>
* Graphics DMA and LCD DMA graphics tranformations
* by Imre Deak <imre.deak@nokia.com>
*/
dma_addr_t omap_get_dma_src_pos(int lch)
{
- dma_addr_t offset;
+ dma_addr_t offset = 0;
if (cpu_class_is_omap1())
offset = (dma_addr_t) (OMAP1_DMA_CSSA_L_REG(lch) |
*/
dma_addr_t omap_get_dma_dst_pos(int lch)
{
- dma_addr_t offset;
+ dma_addr_t offset = 0;
if (cpu_class_is_omap1())
offset = (dma_addr_t) (OMAP1_DMA_CDSA_L_REG(lch) |
{
u32 status = OMAP_DMA_CSR_REG(ch);
- if (!status)
+ if (!status) {
+ if (printk_ratelimit())
+ printk(KERN_WARNING "Spurious DMA IRQ for lch %d\n", ch);
return 0;
- if (unlikely(dma_chan[ch].dev_id == -1))
+ }
+ if (unlikely(dma_chan[ch].dev_id == -1)) {
+ if (printk_ratelimit())
+ printk(KERN_WARNING "IRQ %04x for non-allocated DMA"
+ "channel %d\n", status, ch);
return 0;
+ }
if (unlikely(status & OMAP_DMA_DROP_IRQ))
printk(KERN_INFO
"DMA synchronization event drop occurred with device "
int i;
val = omap_readl(OMAP_DMA4_IRQSTATUS_L0);
-
- for (i = 1; i <= OMAP_LOGICAL_DMA_CH_COUNT; i++) {
- int active = val & (1 << (i - 1));
- if (active)
- omap2_dma_handle_ch(i - 1);
+ if (val == 0) {
+ if (printk_ratelimit())
+ printk(KERN_WARNING "Spurious DMA IRQ\n");
+ return IRQ_HANDLED;
+ }
+ for (i = 0; i < OMAP_LOGICAL_DMA_CH_COUNT && val != 0; i++) {
+ if (val & 1)
+ omap2_dma_handle_ch(i);
+ val >>= 1;
}
return IRQ_HANDLED;
break;
default:
BUG();
- return; /* Supress warning about uninitialized vars */
+ return; /* Suppress warning about uninitialized vars */
}
if (omap_dma_in_1510_mode()) {
omap_writew(w, OMAP1610_DMA_LCD_CTRL);
}
-int omap_lcd_dma_ext_running(void)
-{
- return lcd_dma.ext_ctrl && lcd_dma.active;
-}
-
/*----------------------------------------------------------------------------*/
static int __init omap_init_dma(void)
EXPORT_SYMBOL(omap_enable_lcd_dma);
EXPORT_SYMBOL(omap_setup_lcd_dma);
EXPORT_SYMBOL(omap_stop_lcd_dma);
-EXPORT_SYMBOL(omap_lcd_dma_ext_running);
EXPORT_SYMBOL(omap_set_lcd_dma_b1);
EXPORT_SYMBOL(omap_set_lcd_dma_single_transfer);
EXPORT_SYMBOL(omap_set_lcd_dma_ext_controller);