// SPDX-License-Identifier: GPL-2.0-or-later /* * Ingenic JZ4780 DMA controller * * Copyright (c) 2015 Imagination Technologies * Author: Alex Smith <[email protected]> */ #include <linux/clk.h> #include <linux/dmapool.h> #include <linux/dma-mapping.h> #include <linux/init.h> #include <linux/interrupt.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" /* Global registers. */ #define JZ_DMA_REG_DMAC … #define JZ_DMA_REG_DIRQP … #define JZ_DMA_REG_DDR … #define JZ_DMA_REG_DDRS … #define JZ_DMA_REG_DCKE … #define JZ_DMA_REG_DCKES … #define JZ_DMA_REG_DCKEC … #define JZ_DMA_REG_DMACP … #define JZ_DMA_REG_DSIRQP … #define JZ_DMA_REG_DSIRQM … #define JZ_DMA_REG_DCIRQP … #define JZ_DMA_REG_DCIRQM … /* Per-channel registers. */ #define JZ_DMA_REG_CHAN(n) … #define JZ_DMA_REG_DSA … #define JZ_DMA_REG_DTA … #define JZ_DMA_REG_DTC … #define JZ_DMA_REG_DRT … #define JZ_DMA_REG_DCS … #define JZ_DMA_REG_DCM … #define JZ_DMA_REG_DDA … #define JZ_DMA_REG_DSD … #define JZ_DMA_DMAC_DMAE … #define JZ_DMA_DMAC_AR … #define JZ_DMA_DMAC_HLT … #define JZ_DMA_DMAC_FAIC … #define JZ_DMA_DMAC_FMSC … #define JZ_DMA_DRT_AUTO … #define JZ_DMA_DCS_CTE … #define JZ_DMA_DCS_HLT … #define JZ_DMA_DCS_TT … #define JZ_DMA_DCS_AR … #define JZ_DMA_DCS_DES8 … #define JZ_DMA_DCM_LINK … #define JZ_DMA_DCM_TIE … #define JZ_DMA_DCM_STDE … #define JZ_DMA_DCM_TSZ_SHIFT … #define JZ_DMA_DCM_TSZ_MASK … #define JZ_DMA_DCM_DP_SHIFT … #define JZ_DMA_DCM_SP_SHIFT … #define JZ_DMA_DCM_DAI … #define JZ_DMA_DCM_SAI … #define JZ_DMA_SIZE_4_BYTE … #define JZ_DMA_SIZE_1_BYTE … #define JZ_DMA_SIZE_2_BYTE … #define JZ_DMA_SIZE_16_BYTE … #define JZ_DMA_SIZE_32_BYTE … #define JZ_DMA_SIZE_64_BYTE … #define JZ_DMA_SIZE_128_BYTE … #define JZ_DMA_WIDTH_32_BIT … #define JZ_DMA_WIDTH_8_BIT … #define JZ_DMA_WIDTH_16_BIT … #define JZ_DMA_BUSWIDTHS … #define JZ4780_DMA_CTRL_OFFSET … /* macros for use with jz4780_dma_soc_data.flags */ #define JZ_SOC_DATA_ALLOW_LEGACY_DT … #define JZ_SOC_DATA_PROGRAMMABLE_DMA … #define JZ_SOC_DATA_PER_CHAN_PM … #define JZ_SOC_DATA_NO_DCKES_DCKEC … #define JZ_SOC_DATA_BREAK_LINKS … /** * struct jz4780_dma_hwdesc - descriptor structure read by the DMA controller. * @dcm: value for the DCM (channel command) register * @dsa: source address * @dta: target address * @dtc: transfer count (number of blocks of the transfer size specified in DCM * to transfer) in the low 24 bits, offset of the next descriptor from the * descriptor base address in the upper 8 bits. */ struct jz4780_dma_hwdesc { … }; /* Size of allocations for hardware descriptor blocks. */ #define JZ_DMA_DESC_BLOCK_SIZE … #define JZ_DMA_MAX_DESC … struct jz4780_dma_desc { … }; struct jz4780_dma_chan { … }; struct jz4780_dma_soc_data { … }; struct jz4780_dma_dev { … }; struct jz4780_dma_filter_data { … }; static inline struct jz4780_dma_chan *to_jz4780_dma_chan(struct dma_chan *chan) { … } static inline struct jz4780_dma_desc *to_jz4780_dma_desc( struct virt_dma_desc *vdesc) { … } static inline struct jz4780_dma_dev *jz4780_dma_chan_parent( struct jz4780_dma_chan *jzchan) { … } static inline u32 jz4780_dma_chn_readl(struct jz4780_dma_dev *jzdma, unsigned int chn, unsigned int reg) { … } static inline void jz4780_dma_chn_writel(struct jz4780_dma_dev *jzdma, unsigned int chn, unsigned int reg, u32 val) { … } static inline u32 jz4780_dma_ctrl_readl(struct jz4780_dma_dev *jzdma, unsigned int reg) { … } static inline void jz4780_dma_ctrl_writel(struct jz4780_dma_dev *jzdma, unsigned int reg, u32 val) { … } static inline void jz4780_dma_chan_enable(struct jz4780_dma_dev *jzdma, unsigned int chn) { … } static inline void jz4780_dma_chan_disable(struct jz4780_dma_dev *jzdma, unsigned int chn) { … } static struct jz4780_dma_desc * jz4780_dma_desc_alloc(struct jz4780_dma_chan *jzchan, unsigned int count, enum dma_transaction_type type, enum dma_transfer_direction direction) { … } static void jz4780_dma_desc_free(struct virt_dma_desc *vdesc) { … } static u32 jz4780_dma_transfer_size(struct jz4780_dma_chan *jzchan, unsigned long val, u32 *shift) { … } static int jz4780_dma_setup_hwdesc(struct jz4780_dma_chan *jzchan, struct jz4780_dma_hwdesc *desc, dma_addr_t addr, size_t len, enum dma_transfer_direction direction) { … } static struct dma_async_tx_descriptor *jz4780_dma_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 struct dma_async_tx_descriptor *jz4780_dma_prep_dma_cyclic( struct dma_chan *chan, dma_addr_t buf_addr, size_t buf_len, size_t period_len, enum dma_transfer_direction direction, unsigned long flags) { … } static struct dma_async_tx_descriptor *jz4780_dma_prep_dma_memcpy( struct dma_chan *chan, dma_addr_t dest, dma_addr_t src, size_t len, unsigned long flags) { … } static void jz4780_dma_begin(struct jz4780_dma_chan *jzchan) { … } static void jz4780_dma_issue_pending(struct dma_chan *chan) { … } static int jz4780_dma_terminate_all(struct dma_chan *chan) { … } static void jz4780_dma_synchronize(struct dma_chan *chan) { … } static int jz4780_dma_config(struct dma_chan *chan, struct dma_slave_config *config) { … } static size_t jz4780_dma_desc_residue(struct jz4780_dma_chan *jzchan, struct jz4780_dma_desc *desc, unsigned int next_sg) { … } static enum dma_status jz4780_dma_tx_status(struct dma_chan *chan, dma_cookie_t cookie, struct dma_tx_state *txstate) { … } static bool jz4780_dma_chan_irq(struct jz4780_dma_dev *jzdma, struct jz4780_dma_chan *jzchan) { … } static irqreturn_t jz4780_dma_irq_handler(int irq, void *data) { … } static int jz4780_dma_alloc_chan_resources(struct dma_chan *chan) { … } static void jz4780_dma_free_chan_resources(struct dma_chan *chan) { … } static bool jz4780_dma_filter_fn(struct dma_chan *chan, void *param) { … } static struct dma_chan *jz4780_of_dma_xlate(struct of_phandle_args *dma_spec, struct of_dma *ofdma) { … } static int jz4780_dma_probe(struct platform_device *pdev) { … } static void jz4780_dma_remove(struct platform_device *pdev) { … } static const struct jz4780_dma_soc_data jz4740_dma_soc_data = …; static const struct jz4780_dma_soc_data jz4725b_dma_soc_data = …; static const struct jz4780_dma_soc_data jz4755_dma_soc_data = …; static const struct jz4780_dma_soc_data jz4760_dma_soc_data = …; static const struct jz4780_dma_soc_data jz4760_mdma_soc_data = …; static const struct jz4780_dma_soc_data jz4760_bdma_soc_data = …; static const struct jz4780_dma_soc_data jz4760b_dma_soc_data = …; static const struct jz4780_dma_soc_data jz4760b_mdma_soc_data = …; static const struct jz4780_dma_soc_data jz4760b_bdma_soc_data = …; static const struct jz4780_dma_soc_data jz4770_dma_soc_data = …; static const struct jz4780_dma_soc_data jz4780_dma_soc_data = …; static const struct jz4780_dma_soc_data x1000_dma_soc_data = …; static const struct jz4780_dma_soc_data x1830_dma_soc_data = …; static const struct of_device_id jz4780_dma_dt_match[] = …; MODULE_DEVICE_TABLE(of, jz4780_dma_dt_match); static struct platform_driver jz4780_dma_driver = …; static int __init jz4780_dma_init(void) { … } subsys_initcall(jz4780_dma_init); static void __exit jz4780_dma_exit(void) { … } module_exit(jz4780_dma_exit); MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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