// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2013 - 2015 Linaro Ltd. * Copyright (c) 2013 HiSilicon Limited. */ #include <linux/sched.h> #include <linux/device.h> #include <linux/dma-mapping.h> #include <linux/dmapool.h> #include <linux/dmaengine.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/of.h> #include <linux/clk.h> #include <linux/of_dma.h> #include "virt-dma.h" #define DRIVER_NAME … #define DMA_MAX_SIZE … #define DMA_CYCLIC_MAX_PERIOD … #define LLI_BLOCK_SIZE … #define INT_STAT … #define INT_TC1 … #define INT_TC2 … #define INT_ERR1 … #define INT_ERR2 … #define INT_TC1_MASK … #define INT_TC2_MASK … #define INT_ERR1_MASK … #define INT_ERR2_MASK … #define INT_TC1_RAW … #define INT_TC2_RAW … #define INT_ERR1_RAW … #define INT_ERR2_RAW … #define CH_PRI … #define CH_STAT … #define CX_CUR_CNT … #define CX_LLI … #define CX_CNT1 … #define CX_CNT0 … #define CX_SRC … #define CX_DST … #define CX_CFG … #define CX_LLI_CHAIN_EN … #define CX_CFG_EN … #define CX_CFG_NODEIRQ … #define CX_CFG_MEM2PER … #define CX_CFG_PER2MEM … #define CX_CFG_SRCINCR … #define CX_CFG_DSTINCR … struct k3_desc_hw { … } __aligned(…); struct k3_dma_desc_sw { … }; struct k3_dma_phy; struct k3_dma_chan { … }; struct k3_dma_phy { … }; struct k3_dma_dev { … }; #define K3_FLAG_NOCLK … struct k3dma_soc_data { … }; #define to_k3_dma(dmadev) … static int k3_dma_config_write(struct dma_chan *chan, enum dma_transfer_direction dir, struct dma_slave_config *cfg); static struct k3_dma_chan *to_k3_chan(struct dma_chan *chan) { … } static void k3_dma_pause_dma(struct k3_dma_phy *phy, bool on) { … } static void k3_dma_terminate_chan(struct k3_dma_phy *phy, struct k3_dma_dev *d) { … } static void k3_dma_set_desc(struct k3_dma_phy *phy, struct k3_desc_hw *hw) { … } static u32 k3_dma_get_curr_cnt(struct k3_dma_dev *d, struct k3_dma_phy *phy) { … } static u32 k3_dma_get_curr_lli(struct k3_dma_phy *phy) { … } static u32 k3_dma_get_chan_stat(struct k3_dma_dev *d) { … } static void k3_dma_enable_dma(struct k3_dma_dev *d, bool on) { … } static irqreturn_t k3_dma_int_handler(int irq, void *dev_id) { … } static int k3_dma_start_txd(struct k3_dma_chan *c) { … } static void k3_dma_tasklet(struct tasklet_struct *t) { … } static void k3_dma_free_chan_resources(struct dma_chan *chan) { … } static enum dma_status k3_dma_tx_status(struct dma_chan *chan, dma_cookie_t cookie, struct dma_tx_state *state) { … } static void k3_dma_issue_pending(struct dma_chan *chan) { … } static void k3_dma_fill_desc(struct k3_dma_desc_sw *ds, dma_addr_t dst, dma_addr_t src, size_t len, u32 num, u32 ccfg) { … } static struct k3_dma_desc_sw *k3_dma_alloc_desc_resource(int num, struct dma_chan *chan) { … } static struct dma_async_tx_descriptor *k3_dma_prep_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 *k3_dma_prep_slave_sg( struct dma_chan *chan, struct scatterlist *sgl, unsigned int sglen, enum dma_transfer_direction dir, unsigned long flags, void *context) { … } static struct dma_async_tx_descriptor * k3_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 dir, unsigned long flags) { … } static int k3_dma_config(struct dma_chan *chan, struct dma_slave_config *cfg) { … } static int k3_dma_config_write(struct dma_chan *chan, enum dma_transfer_direction dir, struct dma_slave_config *cfg) { … } static void k3_dma_free_desc(struct virt_dma_desc *vd) { … } static int k3_dma_terminate_all(struct dma_chan *chan) { … } static void k3_dma_synchronize(struct dma_chan *chan) { … } static int k3_dma_transfer_pause(struct dma_chan *chan) { … } static int k3_dma_transfer_resume(struct dma_chan *chan) { … } static const struct k3dma_soc_data k3_v1_dma_data = …; static const struct k3dma_soc_data asp_v1_dma_data = …; static const struct of_device_id k3_pdma_dt_ids[] = …; MODULE_DEVICE_TABLE(of, k3_pdma_dt_ids); static struct dma_chan *k3_of_dma_simple_xlate(struct of_phandle_args *dma_spec, struct of_dma *ofdma) { … } static int k3_dma_probe(struct platform_device *op) { … } static void k3_dma_remove(struct platform_device *op) { … } #ifdef CONFIG_PM_SLEEP static int k3_dma_suspend_dev(struct device *dev) { … } static int k3_dma_resume_dev(struct device *dev) { … } #endif static SIMPLE_DEV_PM_OPS(k3_dma_pmops, k3_dma_suspend_dev, k3_dma_resume_dev); static struct platform_driver k3_pdma_driver = …; module_platform_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_ALIAS(…) …; MODULE_LICENSE(…) …;
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