embox

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package embox.driver.dma
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/* @BuildDepends(third_party.bsp.st_bsp_api) */
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module pl330_dma extends dma_api {
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    /* raspi0 has physical memory base of 0x20000000
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    */
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	option number dma0_base = 0x20007000
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	option number dmaF_base = 0x20E05000
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	/* Firmware, depending upon version, is using some 
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	 * of the channels, earlier ones use 0, 2, 4, 6 and 
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	 * later ones (Pi 4) use 2, 11, 12, 13, 14.  Some testing
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	 * and validation on your target is required. 
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	 *
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	 * - IRQ to channel: IRQ 16 / DMA 0, 17/1, 18/2, 19/3, 20/4, 21/5
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	 *   22/6, 23/7, 24/8, 25/9, 26/A
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	 * - IRQ number 27 is shared by channels B thru E 
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	 * - Channel F does not have an IRQ
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	 * - IRQ number 28 also fires for any DMA channel interrupt ( 16 thru 27 )
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	 */
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	option number dma_default_chan = 3
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	option number dma_default_irq = 19
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	option string log_level="LOG_ERR"
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	source "pl330_dma.c"
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	@IncludeExport(path="drivers/dma")
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	source "pl330_dma.h"
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	depends embox.mem.page_api
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}
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