diff options
Diffstat (limited to 'arch/arm/plat-omap/dma.c')
| -rw-r--r-- | arch/arm/plat-omap/dma.c | 42 |
1 files changed, 30 insertions, 12 deletions
diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c index 4136b20cba3..b5608b1f9fb 100644 --- a/arch/arm/plat-omap/dma.c +++ b/arch/arm/plat-omap/dma.c @@ -70,6 +70,7 @@ static u32 errata; static struct omap_dma_global_context_registers { u32 dma_irqenable_l0; + u32 dma_irqenable_l1; u32 dma_ocp_sysconfig; u32 dma_gcr; } omap_dma_global_context; @@ -701,8 +702,8 @@ int omap_request_dma(int dev_id, const char *dev_name, for (ch = 0; ch < dma_chan_count; ch++) { if (free_ch == -1 && dma_chan[ch].dev_id == -1) { free_ch = ch; - if (dev_id == 0) - break; + /* Exit after first free channel found */ + break; } } if (free_ch == -1) { @@ -894,11 +895,12 @@ void omap_start_dma(int lch) int next_lch, cur_lch; char dma_chan_link_map[MAX_LOGICAL_DMA_CH_COUNT]; - dma_chan_link_map[lch] = 1; /* Set the link register of the first channel */ enable_lnk(lch); memset(dma_chan_link_map, 0, sizeof(dma_chan_link_map)); + dma_chan_link_map[lch] = 1; + cur_lch = dma_chan[lch].next_lch; do { next_lch = dma_chan[cur_lch].next_lch; @@ -1964,7 +1966,6 @@ static irqreturn_t omap2_dma_irq_handler(int irq, void *dev_id) static struct irqaction omap24xx_dma_irq = { .name = "DMA", .handler = omap2_dma_irq_handler, - .flags = IRQF_DISABLED }; #else @@ -1973,10 +1974,17 @@ static struct irqaction omap24xx_dma_irq; /*----------------------------------------------------------------------------*/ +/* + * Note that we are currently using only IRQENABLE_L0 and L1. + * As the DSP may be using IRQENABLE_L2 and L3, let's not + * touch those for now. + */ void omap_dma_global_context_save(void) { omap_dma_global_context.dma_irqenable_l0 = p->dma_read(IRQENABLE_L0, 0); + omap_dma_global_context.dma_irqenable_l1 = + p->dma_read(IRQENABLE_L1, 0); omap_dma_global_context.dma_ocp_sysconfig = p->dma_read(OCP_SYSCONFIG, 0); omap_dma_global_context.dma_gcr = p->dma_read(GCR, 0); @@ -1991,6 +1999,8 @@ void omap_dma_global_context_restore(void) OCP_SYSCONFIG, 0); p->dma_write(omap_dma_global_context.dma_irqenable_l0, IRQENABLE_L0, 0); + p->dma_write(omap_dma_global_context.dma_irqenable_l1, + IRQENABLE_L1, 0); if (IS_DMA_ERRATA(DMA_ROMCODE_BUG)) p->dma_write(0x3 , IRQSTATUS_L0, 0); @@ -2000,6 +2010,12 @@ void omap_dma_global_context_restore(void) omap_clear_dma(ch); } +struct omap_system_dma_plat_info *omap_get_plat_info(void) +{ + return p; +} +EXPORT_SYMBOL_GPL(omap_get_plat_info); + static int omap_system_dma_probe(struct platform_device *pdev) { int ch, ret = 0; @@ -2019,14 +2035,21 @@ static int omap_system_dma_probe(struct platform_device *pdev) errata = p->errata; if ((d->dev_caps & RESERVE_CHANNEL) && omap_dma_reserve_channels - && (omap_dma_reserve_channels <= dma_lch_count)) + && (omap_dma_reserve_channels < d->lch_count)) d->lch_count = omap_dma_reserve_channels; dma_lch_count = d->lch_count; dma_chan_count = dma_lch_count; - dma_chan = d->chan; enable_1510_mode = d->dev_caps & ENABLE_1510_MODE; + dma_chan = devm_kcalloc(&pdev->dev, dma_lch_count, + sizeof(struct omap_dma_lch), GFP_KERNEL); + if (!dma_chan) { + dev_err(&pdev->dev, "%s: kzalloc fail\n", __func__); + return -ENOMEM; + } + + if (dma_omap2plus()) { dma_linked_lch = kzalloc(sizeof(struct dma_link_info) * dma_lch_count, GFP_KERNEL); @@ -2082,6 +2105,7 @@ static int omap_system_dma_probe(struct platform_device *pdev) dma_irq = platform_get_irq_byname(pdev, irq_name); if (dma_irq < 0) { dev_err(&pdev->dev, "failed: request IRQ %d", dma_irq); + ret = dma_irq; goto exit_dma_lch_fail; } ret = setup_irq(dma_irq, &omap24xx_dma_irq); @@ -2110,9 +2134,6 @@ exit_dma_irq_fail: } exit_dma_lch_fail: - kfree(p); - kfree(d); - kfree(dma_chan); return ret; } @@ -2132,9 +2153,6 @@ static int omap_system_dma_remove(struct platform_device *pdev) free_irq(dma_irq, (void *)(irq_rel + 1)); } } - kfree(p); - kfree(d); - kfree(dma_chan); return 0; } |