diff options
Diffstat (limited to 'arch/arm/plat-omap')
| -rw-r--r-- | arch/arm/plat-omap/dma.c | 22 | ||||
| -rw-r--r-- | arch/arm/plat-omap/include/plat/serial.h | 2 |
2 files changed, 22 insertions, 2 deletions
diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c index c22217c2ee5..002fb4d96bb 100644 --- a/arch/arm/plat-omap/dma.c +++ b/arch/arm/plat-omap/dma.c @@ -1034,6 +1034,18 @@ dma_addr_t omap_get_dma_src_pos(int lch) if (IS_DMA_ERRATA(DMA_ERRATA_3_3) && offset == 0) offset = p->dma_read(CSAC, lch); + if (!cpu_is_omap15xx()) { + /* + * CDAC == 0 indicates that the DMA transfer on the channel has + * not been started (no data has been transferred so far). + * Return the programmed source start address in this case. + */ + if (likely(p->dma_read(CDAC, lch))) + offset = p->dma_read(CSAC, lch); + else + offset = p->dma_read(CSSA, lch); + } + if (cpu_class_is_omap1()) offset |= (p->dma_read(CSSA, lch) & 0xFFFF0000); @@ -1062,8 +1074,16 @@ dma_addr_t omap_get_dma_dst_pos(int lch) * omap 3.2/3.3 erratum: sometimes 0 is returned if CSAC/CDAC is * read before the DMA controller finished disabling the channel. */ - if (!cpu_is_omap15xx() && offset == 0) + if (!cpu_is_omap15xx() && offset == 0) { offset = p->dma_read(CDAC, lch); + /* + * CDAC == 0 indicates that the DMA transfer on the channel has + * not been started (no data has been transferred so far). + * Return the programmed destination start address in this case. + */ + if (unlikely(!offset)) + offset = p->dma_read(CDSA, lch); + } if (cpu_class_is_omap1()) offset |= (p->dma_read(CDSA, lch) & 0xFFFF0000); diff --git a/arch/arm/plat-omap/include/plat/serial.h b/arch/arm/plat-omap/include/plat/serial.h index 6975ee3f521..581851df152 100644 --- a/arch/arm/plat-omap/include/plat/serial.h +++ b/arch/arm/plat-omap/include/plat/serial.h @@ -2,7 +2,7 @@ * arch/arm/plat-omap/include/mach/serial.h * * Copyright (C) 2009 Texas Instruments - * Addded OMAP4 support- Santosh Shilimkar <santosh.shilimkar@ti.com> + * Added OMAP4 support- Santosh Shilimkar <santosh.shilimkar@ti.com> * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of |