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author | 2017-09-28 03:49:22 +0200 | |
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committer | 2017-10-16 12:31:24 +0530 | |
commit | 500fa9e76bbc40c7dbb65c7daccdc8bc49684429 (patch) | |
tree | be2d07339f44bf9a7ed88ff5dab705f8475e5951 /drivers/dma | |
parent | dmaengine: sun6i: Enable additional burst lengths/widths on H3 (diff) | |
download | linux-500fa9e76bbc40c7dbb65c7daccdc8bc49684429.tar.gz linux-500fa9e76bbc40c7dbb65c7daccdc8bc49684429.tar.bz2 linux-500fa9e76bbc40c7dbb65c7daccdc8bc49684429.zip |
dmaengine: sun6i: Move number of pchans/vchans/request to device struct
Preparatory patch: If the same compatible is used for different SoCs which
have a common register layout, but different number of channels, the
channel count can no longer be stored in the config. Store it in the
device structure instead.
Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma')
-rw-r--r-- | drivers/dma/sun6i-dma.c | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c index 55c915f490e0..f27b126dd6cd 100644 --- a/drivers/dma/sun6i-dma.c +++ b/drivers/dma/sun6i-dma.c @@ -188,6 +188,9 @@ struct sun6i_dma_dev { struct sun6i_pchan *pchans; struct sun6i_vchan *vchans; const struct sun6i_dma_config *cfg; + u32 num_pchans; + u32 num_vchans; + u32 max_request; }; static struct device *chan2dev(struct dma_chan *chan) @@ -434,7 +437,6 @@ static int sun6i_dma_start_desc(struct sun6i_vchan *vchan) static void sun6i_dma_tasklet(unsigned long data) { struct sun6i_dma_dev *sdev = (struct sun6i_dma_dev *)data; - const struct sun6i_dma_config *cfg = sdev->cfg; struct sun6i_vchan *vchan; struct sun6i_pchan *pchan; unsigned int pchan_alloc = 0; @@ -462,7 +464,7 @@ static void sun6i_dma_tasklet(unsigned long data) } spin_lock_irq(&sdev->lock); - for (pchan_idx = 0; pchan_idx < cfg->nr_max_channels; pchan_idx++) { + for (pchan_idx = 0; pchan_idx < sdev->num_pchans; pchan_idx++) { pchan = &sdev->pchans[pchan_idx]; if (pchan->vchan || list_empty(&sdev->pending)) @@ -483,7 +485,7 @@ static void sun6i_dma_tasklet(unsigned long data) } spin_unlock_irq(&sdev->lock); - for (pchan_idx = 0; pchan_idx < cfg->nr_max_channels; pchan_idx++) { + for (pchan_idx = 0; pchan_idx < sdev->num_pchans; pchan_idx++) { if (!(pchan_alloc & BIT(pchan_idx))) continue; @@ -505,7 +507,7 @@ static irqreturn_t sun6i_dma_interrupt(int irq, void *dev_id) int i, j, ret = IRQ_NONE; u32 status; - for (i = 0; i < sdev->cfg->nr_max_channels / DMA_IRQ_CHAN_NR; i++) { + for (i = 0; i < sdev->num_pchans / DMA_IRQ_CHAN_NR; i++) { status = readl(sdev->base + DMA_IRQ_STAT(i)); if (!status) continue; @@ -985,7 +987,7 @@ static struct dma_chan *sun6i_dma_of_xlate(struct of_phandle_args *dma_spec, struct dma_chan *chan; u8 port = dma_spec->args[0]; - if (port > sdev->cfg->nr_max_requests) + if (port > sdev->max_request) return NULL; chan = dma_get_any_slave_channel(&sdev->slave); @@ -1018,7 +1020,7 @@ static inline void sun6i_dma_free(struct sun6i_dma_dev *sdev) { int i; - for (i = 0; i < sdev->cfg->nr_max_vchans; i++) { + for (i = 0; i < sdev->num_vchans; i++) { struct sun6i_vchan *vchan = &sdev->vchans[i]; list_del(&vchan->vc.chan.device_node); @@ -1222,26 +1224,30 @@ static int sun6i_dma_probe(struct platform_device *pdev) sdc->slave.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; sdc->slave.dev = &pdev->dev; - sdc->pchans = devm_kcalloc(&pdev->dev, sdc->cfg->nr_max_channels, + sdc->num_pchans = sdc->cfg->nr_max_channels; + sdc->num_vchans = sdc->cfg->nr_max_vchans; + sdc->max_request = sdc->cfg->nr_max_requests; + + sdc->pchans = devm_kcalloc(&pdev->dev, sdc->num_pchans, sizeof(struct sun6i_pchan), GFP_KERNEL); if (!sdc->pchans) return -ENOMEM; - sdc->vchans = devm_kcalloc(&pdev->dev, sdc->cfg->nr_max_vchans, + sdc->vchans = devm_kcalloc(&pdev->dev, sdc->num_vchans, sizeof(struct sun6i_vchan), GFP_KERNEL); if (!sdc->vchans) return -ENOMEM; tasklet_init(&sdc->task, sun6i_dma_tasklet, (unsigned long)sdc); - for (i = 0; i < sdc->cfg->nr_max_channels; i++) { + for (i = 0; i < sdc->num_pchans; i++) { struct sun6i_pchan *pchan = &sdc->pchans[i]; pchan->idx = i; pchan->base = sdc->base + 0x100 + i * 0x40; } - for (i = 0; i < sdc->cfg->nr_max_vchans; i++) { + for (i = 0; i < sdc->num_vchans; i++) { struct sun6i_vchan *vchan = &sdc->vchans[i]; INIT_LIST_HEAD(&vchan->node); |