Lines Matching full:dmac
3 * Driver for the Analog Devices AXI-DMAC core
27 #include <dt-bindings/dma/axi-dmac.h>
33 * The AXI-DMAC is a soft IP core that is used in FPGA designs. The core has
229 struct axi_dmac *dmac = chan_to_axi_dmac(chan); in axi_dmac_start_transfer() local
237 val = axi_dmac_read(dmac, AXI_DMAC_REG_START_TRANSFER); in axi_dmac_start_transfer()
272 sg->hw->id = axi_dmac_read(dmac, AXI_DMAC_REG_TRANSFER_ID); in axi_dmac_start_transfer()
276 axi_dmac_write(dmac, AXI_DMAC_REG_DEST_ADDRESS, sg->hw->dest_addr); in axi_dmac_start_transfer()
277 axi_dmac_write(dmac, AXI_DMAC_REG_DEST_STRIDE, sg->hw->dst_stride); in axi_dmac_start_transfer()
281 axi_dmac_write(dmac, AXI_DMAC_REG_SRC_ADDRESS, sg->hw->src_addr); in axi_dmac_start_transfer()
282 axi_dmac_write(dmac, AXI_DMAC_REG_SRC_STRIDE, sg->hw->src_stride); in axi_dmac_start_transfer()
301 axi_dmac_write(dmac, AXI_DMAC_REG_SG_ADDRESS, (u32)sg->hw_phys); in axi_dmac_start_transfer()
302 axi_dmac_write(dmac, AXI_DMAC_REG_SG_ADDRESS_HIGH, in axi_dmac_start_transfer()
305 axi_dmac_write(dmac, AXI_DMAC_REG_X_LENGTH, sg->hw->x_len); in axi_dmac_start_transfer()
306 axi_dmac_write(dmac, AXI_DMAC_REG_Y_LENGTH, sg->hw->y_len); in axi_dmac_start_transfer()
308 axi_dmac_write(dmac, AXI_DMAC_REG_FLAGS, flags); in axi_dmac_start_transfer()
309 axi_dmac_write(dmac, AXI_DMAC_REG_START_TRANSFER, 1); in axi_dmac_start_transfer()
329 struct axi_dmac *dmac = chan_to_axi_dmac(chan); in axi_dmac_dequeue_partial_xfers() local
336 len = axi_dmac_read(dmac, AXI_DMAC_REG_PARTIAL_XFER_LEN); in axi_dmac_dequeue_partial_xfers()
337 id = axi_dmac_read(dmac, AXI_DMAC_REG_PARTIAL_XFER_ID); in axi_dmac_dequeue_partial_xfers()
357 dev_dbg(dmac->dma_dev.dev, in axi_dmac_dequeue_partial_xfers()
361 dev_warn(dmac->dma_dev.dev, in axi_dmac_dequeue_partial_xfers()
367 xfer_done = axi_dmac_read(dmac, AXI_DMAC_REG_TRANSFER_DONE); in axi_dmac_dequeue_partial_xfers()
460 struct axi_dmac *dmac = devid; in axi_dmac_interrupt_handler() local
464 pending = axi_dmac_read(dmac, AXI_DMAC_REG_IRQ_PENDING); in axi_dmac_interrupt_handler()
468 axi_dmac_write(dmac, AXI_DMAC_REG_IRQ_PENDING, pending); in axi_dmac_interrupt_handler()
470 spin_lock(&dmac->chan.vchan.lock); in axi_dmac_interrupt_handler()
475 completed = axi_dmac_read(dmac, AXI_DMAC_REG_TRANSFER_DONE); in axi_dmac_interrupt_handler()
476 start_next = axi_dmac_transfer_done(&dmac->chan, completed); in axi_dmac_interrupt_handler()
480 axi_dmac_start_transfer(&dmac->chan); in axi_dmac_interrupt_handler()
481 spin_unlock(&dmac->chan.vchan.lock); in axi_dmac_interrupt_handler()
489 struct axi_dmac *dmac = chan_to_axi_dmac(chan); in axi_dmac_terminate_all() local
494 axi_dmac_write(dmac, AXI_DMAC_REG_CTRL, 0); in axi_dmac_terminate_all()
515 struct axi_dmac *dmac = chan_to_axi_dmac(chan); in axi_dmac_issue_pending() local
522 axi_dmac_write(dmac, AXI_DMAC_REG_CTRL, ctrl); in axi_dmac_issue_pending()
533 struct axi_dmac *dmac = chan_to_axi_dmac(chan); in axi_dmac_alloc_desc() local
534 struct device *dev = dmac->dma_dev.dev; in axi_dmac_alloc_desc()
572 struct axi_dmac *dmac = chan_to_axi_dmac(desc->chan); in axi_dmac_free_desc() local
573 struct device *dev = dmac->dma_dev.dev; in axi_dmac_free_desc()
887 static int axi_dmac_parse_dt(struct device *dev, struct axi_dmac *dmac) in axi_dmac_parse_dt() argument
897 ret = axi_dmac_parse_chan_dt(of_chan, &dmac->chan); in axi_dmac_parse_dt()
909 static int axi_dmac_read_chan_config(struct device *dev, struct axi_dmac *dmac) in axi_dmac_read_chan_config() argument
911 struct axi_dmac_chan *chan = &dmac->chan; in axi_dmac_read_chan_config()
914 desc = axi_dmac_read(dmac, AXI_DMAC_REG_INTERFACE_DESC); in axi_dmac_read_chan_config()
954 static int axi_dmac_detect_caps(struct axi_dmac *dmac, unsigned int version) in axi_dmac_detect_caps() argument
956 struct axi_dmac_chan *chan = &dmac->chan; in axi_dmac_detect_caps()
958 axi_dmac_write(dmac, AXI_DMAC_REG_FLAGS, AXI_DMAC_FLAG_CYCLIC); in axi_dmac_detect_caps()
959 if (axi_dmac_read(dmac, AXI_DMAC_REG_FLAGS) == AXI_DMAC_FLAG_CYCLIC) in axi_dmac_detect_caps()
962 axi_dmac_write(dmac, AXI_DMAC_REG_SG_ADDRESS, 0xffffffff); in axi_dmac_detect_caps()
963 if (axi_dmac_read(dmac, AXI_DMAC_REG_SG_ADDRESS)) in axi_dmac_detect_caps()
966 axi_dmac_write(dmac, AXI_DMAC_REG_Y_LENGTH, 1); in axi_dmac_detect_caps()
967 if (axi_dmac_read(dmac, AXI_DMAC_REG_Y_LENGTH) == 1) in axi_dmac_detect_caps()
970 axi_dmac_write(dmac, AXI_DMAC_REG_X_LENGTH, 0xffffffff); in axi_dmac_detect_caps()
971 chan->max_length = axi_dmac_read(dmac, AXI_DMAC_REG_X_LENGTH); in axi_dmac_detect_caps()
975 axi_dmac_write(dmac, AXI_DMAC_REG_DEST_ADDRESS, 0xffffffff); in axi_dmac_detect_caps()
976 if (axi_dmac_read(dmac, AXI_DMAC_REG_DEST_ADDRESS) == 0 && in axi_dmac_detect_caps()
978 dev_err(dmac->dma_dev.dev, in axi_dmac_detect_caps()
983 axi_dmac_write(dmac, AXI_DMAC_REG_SRC_ADDRESS, 0xffffffff); in axi_dmac_detect_caps()
984 if (axi_dmac_read(dmac, AXI_DMAC_REG_SRC_ADDRESS) == 0 && in axi_dmac_detect_caps()
986 dev_err(dmac->dma_dev.dev, in axi_dmac_detect_caps()
995 axi_dmac_write(dmac, AXI_DMAC_REG_X_LENGTH, 0x00); in axi_dmac_detect_caps()
997 axi_dmac_read(dmac, AXI_DMAC_REG_X_LENGTH); in axi_dmac_detect_caps()
1008 struct axi_dmac *dmac; in axi_dmac_probe() local
1014 dmac = devm_kzalloc(&pdev->dev, sizeof(*dmac), GFP_KERNEL); in axi_dmac_probe()
1015 if (!dmac) in axi_dmac_probe()
1018 dmac->irq = platform_get_irq(pdev, 0); in axi_dmac_probe()
1019 if (dmac->irq < 0) in axi_dmac_probe()
1020 return dmac->irq; in axi_dmac_probe()
1021 if (dmac->irq == 0) in axi_dmac_probe()
1024 dmac->base = devm_platform_ioremap_resource(pdev, 0); in axi_dmac_probe()
1025 if (IS_ERR(dmac->base)) in axi_dmac_probe()
1026 return PTR_ERR(dmac->base); in axi_dmac_probe()
1028 dmac->clk = devm_clk_get(&pdev->dev, NULL); in axi_dmac_probe()
1029 if (IS_ERR(dmac->clk)) in axi_dmac_probe()
1030 return PTR_ERR(dmac->clk); in axi_dmac_probe()
1032 ret = clk_prepare_enable(dmac->clk); in axi_dmac_probe()
1036 version = axi_dmac_read(dmac, ADI_AXI_REG_VERSION); in axi_dmac_probe()
1039 ret = axi_dmac_read_chan_config(&pdev->dev, dmac); in axi_dmac_probe()
1041 ret = axi_dmac_parse_dt(&pdev->dev, dmac); in axi_dmac_probe()
1046 INIT_LIST_HEAD(&dmac->chan.active_descs); in axi_dmac_probe()
1050 dma_dev = &dmac->dma_dev; in axi_dmac_probe()
1063 dma_dev->src_addr_widths = BIT(dmac->chan.src_width); in axi_dmac_probe()
1064 dma_dev->dst_addr_widths = BIT(dmac->chan.dest_width); in axi_dmac_probe()
1065 dma_dev->directions = BIT(dmac->chan.direction); in axi_dmac_probe()
1070 dmac->chan.vchan.desc_free = axi_dmac_desc_free; in axi_dmac_probe()
1071 vchan_init(&dmac->chan.vchan, dma_dev); in axi_dmac_probe()
1073 ret = axi_dmac_detect_caps(dmac, version); in axi_dmac_probe()
1077 dma_dev->copy_align = (dmac->chan.address_align_mask + 1); in axi_dmac_probe()
1079 if (dmac->chan.hw_sg) in axi_dmac_probe()
1082 axi_dmac_write(dmac, AXI_DMAC_REG_IRQ_MASK, irq_mask); in axi_dmac_probe()
1085 ret = axi_dmac_read(dmac, AXI_DMAC_REG_COHERENCY_DESC); in axi_dmac_probe()
1089 dev_err(dmac->dma_dev.dev, in axi_dmac_probe()
1105 ret = request_irq(dmac->irq, axi_dmac_interrupt_handler, IRQF_SHARED, in axi_dmac_probe()
1106 dev_name(&pdev->dev), dmac); in axi_dmac_probe()
1110 platform_set_drvdata(pdev, dmac); in axi_dmac_probe()
1112 regmap = devm_regmap_init_mmio(&pdev->dev, dmac->base, in axi_dmac_probe()
1122 free_irq(dmac->irq, dmac); in axi_dmac_probe()
1126 dma_async_device_unregister(&dmac->dma_dev); in axi_dmac_probe()
1128 clk_disable_unprepare(dmac->clk); in axi_dmac_probe()
1135 struct axi_dmac *dmac = platform_get_drvdata(pdev); in axi_dmac_remove() local
1138 free_irq(dmac->irq, dmac); in axi_dmac_remove()
1139 tasklet_kill(&dmac->chan.vchan.task); in axi_dmac_remove()
1140 dma_async_device_unregister(&dmac->dma_dev); in axi_dmac_remove()
1141 clk_disable_unprepare(dmac->clk); in axi_dmac_remove()
1145 { .compatible = "adi,axi-dmac-1.00.a" },
1152 .name = "dma-axi-dmac",
1161 MODULE_DESCRIPTION("DMA controller driver for the AXI-DMAC controller");