diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-davinci/dma.c | 41 | ||||
| -rw-r--r-- | arch/arm/mach-davinci/include/mach/edma.h | 9 |
2 files changed, 49 insertions, 1 deletions
diff --git a/arch/arm/mach-davinci/dma.c b/arch/arm/mach-davinci/dma.c index 0b6c01fbedd..2ede598b77d 100644 --- a/arch/arm/mach-davinci/dma.c +++ b/arch/arm/mach-davinci/dma.c @@ -205,6 +205,18 @@ static inline void edma_parm_or(unsigned ctlr, int offset, int param_no, edma_or(ctlr, EDMA_PARM + offset + (param_no << 5), or); } +static inline void set_bits(int offset, int len, unsigned long *p) +{ + for (; len > 0; len--) + set_bit(offset + (len - 1), p); +} + +static inline void clear_bits(int offset, int len, unsigned long *p) +{ + for (; len > 0; len--) + clear_bit(offset + (len - 1), p); +} + /*****************************************************************************/ /* actual number of DMA channels and slots on this silicon */ @@ -1377,8 +1389,10 @@ static int __init edma_probe(struct platform_device *pdev) struct edma_soc_info **info = pdev->dev.platform_data; const s8 (*queue_priority_mapping)[2]; const s8 (*queue_tc_mapping)[2]; - int i, j, found = 0; + int i, j, off, ln, found = 0; int status = -1; + const s16 (*rsv_chans)[2]; + const s16 (*rsv_slots)[2]; int irq[EDMA_MAX_CC] = {0, 0}; int err_irq[EDMA_MAX_CC] = {0, 0}; struct resource *r[EDMA_MAX_CC] = {NULL}; @@ -1446,6 +1460,31 @@ static int __init edma_probe(struct platform_device *pdev) memset(edma_cc[j]->edma_unused, 0xff, sizeof(edma_cc[j]->edma_unused)); + if (info[j]->rsv) { + + /* Clear the reserved channels in unused list */ + rsv_chans = info[j]->rsv->rsv_chans; + if (rsv_chans) { + for (i = 0; rsv_chans[i][0] != -1; i++) { + off = rsv_chans[i][0]; + ln = rsv_chans[i][1]; + clear_bits(off, ln, + edma_cc[j]->edma_unused); + } + } + + /* Set the reserved slots in inuse list */ + rsv_slots = info[j]->rsv->rsv_slots; + if (rsv_slots) { + for (i = 0; rsv_slots[i][0] != -1; i++) { + off = rsv_slots[i][0]; + ln = rsv_slots[i][1]; + set_bits(off, ln, + edma_cc[j]->edma_inuse); + } + } + } + sprintf(irq_name, "edma%d", j); irq[j] = platform_get_irq_byname(pdev, irq_name); edma_cc[j]->irq_res_start = irq[j]; diff --git a/arch/arm/mach-davinci/include/mach/edma.h b/arch/arm/mach-davinci/include/mach/edma.h index 9a3bcc6f260..dc10ef6cf57 100644 --- a/arch/arm/mach-davinci/include/mach/edma.h +++ b/arch/arm/mach-davinci/include/mach/edma.h @@ -271,6 +271,12 @@ void edma_clear_event(unsigned channel); void edma_pause(unsigned channel); void edma_resume(unsigned channel); +struct edma_rsv_info { + + const s16 (*rsv_chans)[2]; + const s16 (*rsv_slots)[2]; +}; + /* platform_data for EDMA driver */ struct edma_soc_info { @@ -282,6 +288,9 @@ struct edma_soc_info { unsigned n_cc; enum dma_event_q default_queue; + /* Resource reservation for other cores */ + struct edma_rsv_info *rsv; + const s8 (*queue_tc_mapping)[2]; const s8 (*queue_priority_mapping)[2]; }; |