// SPDX-License-Identifier: GPL-2.0 /* * External DMA controller driver for UniPhier SoCs * Copyright 2019 Socionext Inc. * Author: Kunihiko Hayashi <[email protected]> */ #include <linux/bitops.h> #include <linux/bitfield.h> #include <linux/iopoll.h> #include <linux/module.h> #include <linux/of.h> #include <linux/of_dma.h> #include <linux/platform_device.h> #include <linux/slab.h> #include "dmaengine.h" #include "virt-dma.h" #define XDMAC_CH_WIDTH … #define XDMAC_TFA … #define XDMAC_TFA_MCNT_MASK … #define XDMAC_TFA_MASK … #define XDMAC_SADM … #define XDMAC_SADM_STW_MASK … #define XDMAC_SADM_SAM … #define XDMAC_SADM_SAM_FIXED … #define XDMAC_SADM_SAM_INC … #define XDMAC_DADM … #define XDMAC_DADM_DTW_MASK … #define XDMAC_DADM_DAM … #define XDMAC_DADM_DAM_FIXED … #define XDMAC_DADM_DAM_INC … #define XDMAC_EXSAD … #define XDMAC_EXDAD … #define XDMAC_SAD … #define XDMAC_DAD … #define XDMAC_ITS … #define XDMAC_ITS_MASK … #define XDMAC_TNUM … #define XDMAC_TNUM_MASK … #define XDMAC_TSS … #define XDMAC_TSS_REQ … #define XDMAC_IEN … #define XDMAC_IEN_ERRIEN … #define XDMAC_IEN_ENDIEN … #define XDMAC_STAT … #define XDMAC_STAT_TENF … #define XDMAC_IR … #define XDMAC_IR_ERRF … #define XDMAC_IR_ENDF … #define XDMAC_ID … #define XDMAC_ID_ERRIDF … #define XDMAC_ID_ENDIDF … #define XDMAC_MAX_CHANS … #define XDMAC_INTERVAL_CLKS … #define XDMAC_MAX_WORDS … /* cut lower bit for maintain alignment of maximum transfer size */ #define XDMAC_MAX_WORD_SIZE … #define UNIPHIER_XDMAC_BUSWIDTHS … struct uniphier_xdmac_desc_node { … }; struct uniphier_xdmac_desc { … }; struct uniphier_xdmac_chan { … }; struct uniphier_xdmac_device { … }; static struct uniphier_xdmac_chan * to_uniphier_xdmac_chan(struct virt_dma_chan *vc) { … } static struct uniphier_xdmac_desc * to_uniphier_xdmac_desc(struct virt_dma_desc *vd) { … } /* xc->vc.lock must be held by caller */ static struct uniphier_xdmac_desc * uniphier_xdmac_next_desc(struct uniphier_xdmac_chan *xc) { … } /* xc->vc.lock must be held by caller */ static void uniphier_xdmac_chan_start(struct uniphier_xdmac_chan *xc, struct uniphier_xdmac_desc *xd) { … } /* xc->vc.lock must be held by caller */ static int uniphier_xdmac_chan_stop(struct uniphier_xdmac_chan *xc) { … } /* xc->vc.lock must be held by caller */ static void uniphier_xdmac_start(struct uniphier_xdmac_chan *xc) { … } static void uniphier_xdmac_chan_irq(struct uniphier_xdmac_chan *xc) { … } static irqreturn_t uniphier_xdmac_irq_handler(int irq, void *dev_id) { … } static void uniphier_xdmac_free_chan_resources(struct dma_chan *chan) { … } static struct dma_async_tx_descriptor * uniphier_xdmac_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dst, dma_addr_t src, size_t len, unsigned long flags) { … } static struct dma_async_tx_descriptor * uniphier_xdmac_prep_slave_sg(struct dma_chan *chan, struct scatterlist *sgl, unsigned int sg_len, enum dma_transfer_direction direction, unsigned long flags, void *context) { … } static int uniphier_xdmac_slave_config(struct dma_chan *chan, struct dma_slave_config *config) { … } static int uniphier_xdmac_terminate_all(struct dma_chan *chan) { … } static void uniphier_xdmac_synchronize(struct dma_chan *chan) { … } static void uniphier_xdmac_issue_pending(struct dma_chan *chan) { … } static void uniphier_xdmac_desc_free(struct virt_dma_desc *vd) { … } static void uniphier_xdmac_chan_init(struct uniphier_xdmac_device *xdev, int ch) { … } static struct dma_chan *of_dma_uniphier_xlate(struct of_phandle_args *dma_spec, struct of_dma *ofdma) { … } static int uniphier_xdmac_probe(struct platform_device *pdev) { … } static void uniphier_xdmac_remove(struct platform_device *pdev) { … } static const struct of_device_id uniphier_xdmac_match[] = …; MODULE_DEVICE_TABLE(of, uniphier_xdmac_match); static struct platform_driver uniphier_xdmac_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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