diff options
Diffstat (limited to 'drivers/dma/dw-axi-dmac')
| -rw-r--r-- | drivers/dma/dw-axi-dmac/Makefile | 2 | ||||
| -rw-r--r-- | drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c | 1602 | ||||
| -rw-r--r-- | drivers/dma/dw-axi-dmac/dw-axi-dmac.h | 400 |
3 files changed, 2004 insertions, 0 deletions
diff --git a/drivers/dma/dw-axi-dmac/Makefile b/drivers/dma/dw-axi-dmac/Makefile new file mode 100644 index 0000000000..4eb2f1639d --- /dev/null +++ b/drivers/dma/dw-axi-dmac/Makefile @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0-only +obj-$(CONFIG_DW_AXI_DMAC) += dw-axi-dmac-platform.o diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c new file mode 100644 index 0000000000..dd02f84e40 --- /dev/null +++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c @@ -0,0 +1,1602 @@ +// SPDX-License-Identifier: GPL-2.0 +// (C) 2017-2018 Synopsys, Inc. (www.synopsys.com) + +/* + * Synopsys DesignWare AXI DMA Controller driver. + * + * Author: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> + */ + +#include <linux/bitops.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/dmaengine.h> +#include <linux/dmapool.h> +#include <linux/dma-mapping.h> +#include <linux/err.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/iopoll.h> +#include <linux/io-64-nonatomic-lo-hi.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_dma.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/property.h> +#include <linux/reset.h> +#include <linux/slab.h> +#include <linux/types.h> + +#include "dw-axi-dmac.h" +#include "../dmaengine.h" +#include "../virt-dma.h" + +/* + * The set of bus widths supported by the DMA controller. DW AXI DMAC supports + * master data bus width up to 512 bits (for both AXI master interfaces), but + * it depends on IP block configuration. + */ +#define AXI_DMA_BUSWIDTHS \ + (DMA_SLAVE_BUSWIDTH_1_BYTE | \ + DMA_SLAVE_BUSWIDTH_2_BYTES | \ + DMA_SLAVE_BUSWIDTH_4_BYTES | \ + DMA_SLAVE_BUSWIDTH_8_BYTES | \ + DMA_SLAVE_BUSWIDTH_16_BYTES | \ + DMA_SLAVE_BUSWIDTH_32_BYTES | \ + DMA_SLAVE_BUSWIDTH_64_BYTES) + +#define AXI_DMA_FLAG_HAS_APB_REGS BIT(0) +#define AXI_DMA_FLAG_HAS_RESETS BIT(1) +#define AXI_DMA_FLAG_USE_CFG2 BIT(2) + +static inline void +axi_dma_iowrite32(struct axi_dma_chip *chip, u32 reg, u32 val) +{ + iowrite32(val, chip->regs + reg); +} + +static inline u32 axi_dma_ioread32(struct axi_dma_chip *chip, u32 reg) +{ + return ioread32(chip->regs + reg); +} + +static inline void +axi_chan_iowrite32(struct axi_dma_chan *chan, u32 reg, u32 val) +{ + iowrite32(val, chan->chan_regs + reg); +} + +static inline u32 axi_chan_ioread32(struct axi_dma_chan *chan, u32 reg) +{ + return ioread32(chan->chan_regs + reg); +} + +static inline void +axi_chan_iowrite64(struct axi_dma_chan *chan, u32 reg, u64 val) +{ + /* + * We split one 64 bit write for two 32 bit write as some HW doesn't + * support 64 bit access. + */ + iowrite32(lower_32_bits(val), chan->chan_regs + reg); + iowrite32(upper_32_bits(val), chan->chan_regs + reg + 4); +} + +static inline void axi_chan_config_write(struct axi_dma_chan *chan, + struct axi_dma_chan_config *config) +{ + u32 cfg_lo, cfg_hi; + + cfg_lo = (config->dst_multblk_type << CH_CFG_L_DST_MULTBLK_TYPE_POS | + config->src_multblk_type << CH_CFG_L_SRC_MULTBLK_TYPE_POS); + if (chan->chip->dw->hdata->reg_map_8_channels && + !chan->chip->dw->hdata->use_cfg2) { + cfg_hi = config->tt_fc << CH_CFG_H_TT_FC_POS | + config->hs_sel_src << CH_CFG_H_HS_SEL_SRC_POS | + config->hs_sel_dst << CH_CFG_H_HS_SEL_DST_POS | + config->src_per << CH_CFG_H_SRC_PER_POS | + config->dst_per << CH_CFG_H_DST_PER_POS | + config->prior << CH_CFG_H_PRIORITY_POS; + } else { + cfg_lo |= config->src_per << CH_CFG2_L_SRC_PER_POS | + config->dst_per << CH_CFG2_L_DST_PER_POS; + cfg_hi = config->tt_fc << CH_CFG2_H_TT_FC_POS | + config->hs_sel_src << CH_CFG2_H_HS_SEL_SRC_POS | + config->hs_sel_dst << CH_CFG2_H_HS_SEL_DST_POS | + config->prior << CH_CFG2_H_PRIORITY_POS; + } + axi_chan_iowrite32(chan, CH_CFG_L, cfg_lo); + axi_chan_iowrite32(chan, CH_CFG_H, cfg_hi); +} + +static inline void axi_dma_disable(struct axi_dma_chip *chip) +{ + u32 val; + + val = axi_dma_ioread32(chip, DMAC_CFG); + val &= ~DMAC_EN_MASK; + axi_dma_iowrite32(chip, DMAC_CFG, val); +} + +static inline void axi_dma_enable(struct axi_dma_chip *chip) +{ + u32 val; + + val = axi_dma_ioread32(chip, DMAC_CFG); + val |= DMAC_EN_MASK; + axi_dma_iowrite32(chip, DMAC_CFG, val); +} + +static inline void axi_dma_irq_disable(struct axi_dma_chip *chip) +{ + u32 val; + + val = axi_dma_ioread32(chip, DMAC_CFG); + val &= ~INT_EN_MASK; + axi_dma_iowrite32(chip, DMAC_CFG, val); +} + +static inline void axi_dma_irq_enable(struct axi_dma_chip *chip) +{ + u32 val; + + val = axi_dma_ioread32(chip, DMAC_CFG); + val |= INT_EN_MASK; + axi_dma_iowrite32(chip, DMAC_CFG, val); +} + +static inline void axi_chan_irq_disable(struct axi_dma_chan *chan, u32 irq_mask) +{ + u32 val; + + if (likely(irq_mask == DWAXIDMAC_IRQ_ALL)) { + axi_chan_iowrite32(chan, CH_INTSTATUS_ENA, DWAXIDMAC_IRQ_NONE); + } else { + val = axi_chan_ioread32(chan, CH_INTSTATUS_ENA); + val &= ~irq_mask; + axi_chan_iowrite32(chan, CH_INTSTATUS_ENA, val); + } +} + +static inline void axi_chan_irq_set(struct axi_dma_chan *chan, u32 irq_mask) +{ + axi_chan_iowrite32(chan, CH_INTSTATUS_ENA, irq_mask); +} + +static inline void axi_chan_irq_sig_set(struct axi_dma_chan *chan, u32 irq_mask) +{ + axi_chan_iowrite32(chan, CH_INTSIGNAL_ENA, irq_mask); +} + +static inline void axi_chan_irq_clear(struct axi_dma_chan *chan, u32 irq_mask) +{ + axi_chan_iowrite32(chan, CH_INTCLEAR, irq_mask); +} + +static inline u32 axi_chan_irq_read(struct axi_dma_chan *chan) +{ + return axi_chan_ioread32(chan, CH_INTSTATUS); +} + +static inline void axi_chan_disable(struct axi_dma_chan *chan) +{ + u32 val; + + val = axi_dma_ioread32(chan->chip, DMAC_CHEN); + val &= ~(BIT(chan->id) << DMAC_CHAN_EN_SHIFT); + if (chan->chip->dw->hdata->reg_map_8_channels) + val |= BIT(chan->id) << DMAC_CHAN_EN_WE_SHIFT; + else + val |= BIT(chan->id) << DMAC_CHAN_EN2_WE_SHIFT; + axi_dma_iowrite32(chan->chip, DMAC_CHEN, val); +} + +static inline void axi_chan_enable(struct axi_dma_chan *chan) +{ + u32 val; + + val = axi_dma_ioread32(chan->chip, DMAC_CHEN); + if (chan->chip->dw->hdata->reg_map_8_channels) + val |= BIT(chan->id) << DMAC_CHAN_EN_SHIFT | + BIT(chan->id) << DMAC_CHAN_EN_WE_SHIFT; + else + val |= BIT(chan->id) << DMAC_CHAN_EN_SHIFT | + BIT(chan->id) << DMAC_CHAN_EN2_WE_SHIFT; + axi_dma_iowrite32(chan->chip, DMAC_CHEN, val); +} + +static inline bool axi_chan_is_hw_enable(struct axi_dma_chan *chan) +{ + u32 val; + + val = axi_dma_ioread32(chan->chip, DMAC_CHEN); + + return !!(val & (BIT(chan->id) << DMAC_CHAN_EN_SHIFT)); +} + +static void axi_dma_hw_init(struct axi_dma_chip *chip) +{ + int ret; + u32 i; + + for (i = 0; i < chip->dw->hdata->nr_channels; i++) { + axi_chan_irq_disable(&chip->dw->chan[i], DWAXIDMAC_IRQ_ALL); + axi_chan_disable(&chip->dw->chan[i]); + } + ret = dma_set_mask_and_coherent(chip->dev, DMA_BIT_MASK(64)); + if (ret) + dev_warn(chip->dev, "Unable to set coherent mask\n"); +} + +static u32 axi_chan_get_xfer_width(struct axi_dma_chan *chan, dma_addr_t src, + dma_addr_t dst, size_t len) +{ + u32 max_width = chan->chip->dw->hdata->m_data_width; + + return __ffs(src | dst | len | BIT(max_width)); +} + +static inline const char *axi_chan_name(struct axi_dma_chan *chan) +{ + return dma_chan_name(&chan->vc.chan); +} + +static struct axi_dma_desc *axi_desc_alloc(u32 num) +{ + struct axi_dma_desc *desc; + + desc = kzalloc(sizeof(*desc), GFP_NOWAIT); + if (!desc) + return NULL; + + desc->hw_desc = kcalloc(num, sizeof(*desc->hw_desc), GFP_NOWAIT); + if (!desc->hw_desc) { + kfree(desc); + return NULL; + } + + return desc; +} + +static struct axi_dma_lli *axi_desc_get(struct axi_dma_chan *chan, + dma_addr_t *addr) +{ + struct axi_dma_lli *lli; + dma_addr_t phys; + + lli = dma_pool_zalloc(chan->desc_pool, GFP_NOWAIT, &phys); + if (unlikely(!lli)) { + dev_err(chan2dev(chan), "%s: not enough descriptors available\n", + axi_chan_name(chan)); + return NULL; + } + + atomic_inc(&chan->descs_allocated); + *addr = phys; + + return lli; +} + +static void axi_desc_put(struct axi_dma_desc *desc) +{ + struct axi_dma_chan *chan = desc->chan; + int count = atomic_read(&chan->descs_allocated); + struct axi_dma_hw_desc *hw_desc; + int descs_put; + + for (descs_put = 0; descs_put < count; descs_put++) { + hw_desc = &desc->hw_desc[descs_put]; + dma_pool_free(chan->desc_pool, hw_desc->lli, hw_desc->llp); + } + + kfree(desc->hw_desc); + kfree(desc); + atomic_sub(descs_put, &chan->descs_allocated); + dev_vdbg(chan2dev(chan), "%s: %d descs put, %d still allocated\n", + axi_chan_name(chan), descs_put, + atomic_read(&chan->descs_allocated)); +} + +static void vchan_desc_put(struct virt_dma_desc *vdesc) +{ + axi_desc_put(vd_to_axi_desc(vdesc)); +} + +static enum dma_status +dma_chan_tx_status(struct dma_chan *dchan, dma_cookie_t cookie, + struct dma_tx_state *txstate) +{ + struct axi_dma_chan *chan = dchan_to_axi_dma_chan(dchan); + struct virt_dma_desc *vdesc; + enum dma_status status; + u32 completed_length; + unsigned long flags; + u32 completed_blocks; + size_t bytes = 0; + u32 length; + u32 len; + + status = dma_cookie_status(dchan, cookie, txstate); + if (status == DMA_COMPLETE || !txstate) + return status; + + spin_lock_irqsave(&chan->vc.lock, flags); + + vdesc = vchan_find_desc(&chan->vc, cookie); + if (vdesc) { + length = vd_to_axi_desc(vdesc)->length; + completed_blocks = vd_to_axi_desc(vdesc)->completed_blocks; + len = vd_to_axi_desc(vdesc)->hw_desc[0].len; + completed_length = completed_blocks * len; + bytes = length - completed_length; + } + + spin_unlock_irqrestore(&chan->vc.lock, flags); + dma_set_residue(txstate, bytes); + + return status; +} + +static void write_desc_llp(struct axi_dma_hw_desc *desc, dma_addr_t adr) +{ + desc->lli->llp = cpu_to_le64(adr); +} + +static void write_chan_llp(struct axi_dma_chan *chan, dma_addr_t adr) +{ + axi_chan_iowrite64(chan, CH_LLP, adr); +} + +static void dw_axi_dma_set_byte_halfword(struct axi_dma_chan *chan, bool set) +{ + u32 offset = DMAC_APB_BYTE_WR_CH_EN; + u32 reg_width, val; + + if (!chan->chip->apb_regs) { + dev_dbg(chan->chip->dev, "apb_regs not initialized\n"); + return; + } + + reg_width = __ffs(chan->config.dst_addr_width); + if (reg_width == DWAXIDMAC_TRANS_WIDTH_16) + offset = DMAC_APB_HALFWORD_WR_CH_EN; + + val = ioread32(chan->chip->apb_regs + offset); + + if (set) + val |= BIT(chan->id); + else + val &= ~BIT(chan->id); + + iowrite32(val, chan->chip->apb_regs + offset); +} +/* Called in chan locked context */ +static void axi_chan_block_xfer_start(struct axi_dma_chan *chan, + struct axi_dma_desc *first) +{ + u32 priority = chan->chip->dw->hdata->priority[chan->id]; + struct axi_dma_chan_config config = {}; + u32 irq_mask; + u8 lms = 0; /* Select AXI0 master for LLI fetching */ + + if (unlikely(axi_chan_is_hw_enable(chan))) { + dev_err(chan2dev(chan), "%s is non-idle!\n", + axi_chan_name(chan)); + + return; + } + + axi_dma_enable(chan->chip); + + config.dst_multblk_type = DWAXIDMAC_MBLK_TYPE_LL; + config.src_multblk_type = DWAXIDMAC_MBLK_TYPE_LL; + config.tt_fc = DWAXIDMAC_TT_FC_MEM_TO_MEM_DMAC; + config.prior = priority; + config.hs_sel_dst = DWAXIDMAC_HS_SEL_HW; + config.hs_sel_src = DWAXIDMAC_HS_SEL_HW; + switch (chan->direction) { + case DMA_MEM_TO_DEV: + dw_axi_dma_set_byte_halfword(chan, true); + config.tt_fc = chan->config.device_fc ? + DWAXIDMAC_TT_FC_MEM_TO_PER_DST : + DWAXIDMAC_TT_FC_MEM_TO_PER_DMAC; + if (chan->chip->apb_regs) + config.dst_per = chan->id; + else + config.dst_per = chan->hw_handshake_num; + break; + case DMA_DEV_TO_MEM: + config.tt_fc = chan->config.device_fc ? + DWAXIDMAC_TT_FC_PER_TO_MEM_SRC : + DWAXIDMAC_TT_FC_PER_TO_MEM_DMAC; + if (chan->chip->apb_regs) + config.src_per = chan->id; + else + config.src_per = chan->hw_handshake_num; + break; + default: + break; + } + axi_chan_config_write(chan, &config); + + write_chan_llp(chan, first->hw_desc[0].llp | lms); + + irq_mask = DWAXIDMAC_IRQ_DMA_TRF | DWAXIDMAC_IRQ_ALL_ERR; + axi_chan_irq_sig_set(chan, irq_mask); + + /* Generate 'suspend' status but don't generate interrupt */ + irq_mask |= DWAXIDMAC_IRQ_SUSPENDED; + axi_chan_irq_set(chan, irq_mask); + + axi_chan_enable(chan); +} + +static void axi_chan_start_first_queued(struct axi_dma_chan *chan) +{ + struct axi_dma_desc *desc; + struct virt_dma_desc *vd; + + vd = vchan_next_desc(&chan->vc); + if (!vd) + return; + + desc = vd_to_axi_desc(vd); + dev_vdbg(chan2dev(chan), "%s: started %u\n", axi_chan_name(chan), + vd->tx.cookie); + axi_chan_block_xfer_start(chan, desc); +} + +static void dma_chan_issue_pending(struct dma_chan *dchan) +{ + struct axi_dma_chan *chan = dchan_to_axi_dma_chan(dchan); + unsigned long flags; + + spin_lock_irqsave(&chan->vc.lock, flags); + if (vchan_issue_pending(&chan->vc)) + axi_chan_start_first_queued(chan); + spin_unlock_irqrestore(&chan->vc.lock, flags); +} + +static void dw_axi_dma_synchronize(struct dma_chan *dchan) +{ + struct axi_dma_chan *chan = dchan_to_axi_dma_chan(dchan); + + vchan_synchronize(&chan->vc); +} + +static int dma_chan_alloc_chan_resources(struct dma_chan *dchan) +{ + struct axi_dma_chan *chan = dchan_to_axi_dma_chan(dchan); + + /* ASSERT: channel is idle */ + if (axi_chan_is_hw_enable(chan)) { + dev_err(chan2dev(chan), "%s is non-idle!\n", + axi_chan_name(chan)); + return -EBUSY; + } + + /* LLI address must be aligned to a 64-byte boundary */ + chan->desc_pool = dma_pool_create(dev_name(chan2dev(chan)), + chan->chip->dev, + sizeof(struct axi_dma_lli), + 64, 0); + if (!chan->desc_pool) { + dev_err(chan2dev(chan), "No memory for descriptors\n"); + return -ENOMEM; + } + dev_vdbg(dchan2dev(dchan), "%s: allocating\n", axi_chan_name(chan)); + + pm_runtime_get(chan->chip->dev); + + return 0; +} + +static void dma_chan_free_chan_resources(struct dma_chan *dchan) +{ + struct axi_dma_chan *chan = dchan_to_axi_dma_chan(dchan); + + /* ASSERT: channel is idle */ + if (axi_chan_is_hw_enable(chan)) + dev_err(dchan2dev(dchan), "%s is non-idle!\n", + axi_chan_name(chan)); + + axi_chan_disable(chan); + axi_chan_irq_disable(chan, DWAXIDMAC_IRQ_ALL); + + vchan_free_chan_resources(&chan->vc); + + dma_pool_destroy(chan->desc_pool); + chan->desc_pool = NULL; + dev_vdbg(dchan2dev(dchan), + "%s: free resources, descriptor still allocated: %u\n", + axi_chan_name(chan), atomic_read(&chan->descs_allocated)); + + pm_runtime_put(chan->chip->dev); +} + +static void dw_axi_dma_set_hw_channel(struct axi_dma_chan *chan, bool set) +{ + struct axi_dma_chip *chip = chan->chip; + unsigned long reg_value, val; + + if (!chip->apb_regs) { + dev_err(chip->dev, "apb_regs not initialized\n"); + return; + } + + /* + * An unused DMA channel has a default value of 0x3F. + * Lock the DMA channel by assign a handshake number to the channel. + * Unlock the DMA channel by assign 0x3F to the channel. + */ + if (set) + val = chan->hw_handshake_num; + else + val = UNUSED_CHANNEL; + + reg_value = lo_hi_readq(chip->apb_regs + DMAC_APB_HW_HS_SEL_0); + + /* Channel is already allocated, set handshake as per channel ID */ + /* 64 bit write should handle for 8 channels */ + + reg_value &= ~(DMA_APB_HS_SEL_MASK << + (chan->id * DMA_APB_HS_SEL_BIT_SIZE)); + reg_value |= (val << (chan->id * DMA_APB_HS_SEL_BIT_SIZE)); + lo_hi_writeq(reg_value, chip->apb_regs + DMAC_APB_HW_HS_SEL_0); + + return; +} + +/* + * If DW_axi_dmac sees CHx_CTL.ShadowReg_Or_LLI_Last bit of the fetched LLI + * as 1, it understands that the current block is the final block in the + * transfer and completes the DMA transfer operation at the end of current + * block transfer. + */ +static void set_desc_last(struct axi_dma_hw_desc *desc) +{ + u32 val; + + val = le32_to_cpu(desc->lli->ctl_hi); + val |= CH_CTL_H_LLI_LAST; + desc->lli->ctl_hi = cpu_to_le32(val); +} + +static void write_desc_sar(struct axi_dma_hw_desc *desc, dma_addr_t adr) +{ + desc->lli->sar = cpu_to_le64(adr); +} + +static void write_desc_dar(struct axi_dma_hw_desc *desc, dma_addr_t adr) +{ + desc->lli->dar = cpu_to_le64(adr); +} + +static void set_desc_src_master(struct axi_dma_hw_desc *desc) +{ + u32 val; + + /* Select AXI0 for source master */ + val = le32_to_cpu(desc->lli->ctl_lo); + val &= ~CH_CTL_L_SRC_MAST; + desc->lli->ctl_lo = cpu_to_le32(val); +} + +static void set_desc_dest_master(struct axi_dma_hw_desc *hw_desc, + struct axi_dma_desc *desc) +{ + u32 val; + + /* Select AXI1 for source master if available */ + val = le32_to_cpu(hw_desc->lli->ctl_lo); + if (desc->chan->chip->dw->hdata->nr_masters > 1) + val |= CH_CTL_L_DST_MAST; + else + val &= ~CH_CTL_L_DST_MAST; + + hw_desc->lli->ctl_lo = cpu_to_le32(val); +} + +static int dw_axi_dma_set_hw_desc(struct axi_dma_chan *chan, + struct axi_dma_hw_desc *hw_desc, + dma_addr_t mem_addr, size_t len) +{ + unsigned int data_width = BIT(chan->chip->dw->hdata->m_data_width); + unsigned int reg_width; + unsigned int mem_width; + dma_addr_t device_addr; + size_t axi_block_ts; + size_t block_ts; + u32 ctllo, ctlhi; + u32 burst_len; + + axi_block_ts = chan->chip->dw->hdata->block_size[chan->id]; + + mem_width = __ffs(data_width | mem_addr | len); + if (mem_width > DWAXIDMAC_TRANS_WIDTH_32) + mem_width = DWAXIDMAC_TRANS_WIDTH_32; + + if (!IS_ALIGNED(mem_addr, 4)) { + dev_err(chan->chip->dev, "invalid buffer alignment\n"); + return -EINVAL; + } + + switch (chan->direction) { + case DMA_MEM_TO_DEV: + reg_width = __ffs(chan->config.dst_addr_width); + device_addr = chan->config.dst_addr; + ctllo = reg_width << CH_CTL_L_DST_WIDTH_POS | + mem_width << CH_CTL_L_SRC_WIDTH_POS | + DWAXIDMAC_CH_CTL_L_NOINC << CH_CTL_L_DST_INC_POS | + DWAXIDMAC_CH_CTL_L_INC << CH_CTL_L_SRC_INC_POS; + block_ts = len >> mem_width; + break; + case DMA_DEV_TO_MEM: + reg_width = __ffs(chan->config.src_addr_width); + device_addr = chan->config.src_addr; + ctllo = reg_width << CH_CTL_L_SRC_WIDTH_POS | + mem_width << CH_CTL_L_DST_WIDTH_POS | + DWAXIDMAC_CH_CTL_L_INC << CH_CTL_L_DST_INC_POS | + DWAXIDMAC_CH_CTL_L_NOINC << CH_CTL_L_SRC_INC_POS; + block_ts = len >> reg_width; + break; + default: + return -EINVAL; + } + + if (block_ts > axi_block_ts) + return -EINVAL; + + hw_desc->lli = axi_desc_get(chan, &hw_desc->llp); + if (unlikely(!hw_desc->lli)) + return -ENOMEM; + + ctlhi = CH_CTL_H_LLI_VALID; + + if (chan->chip->dw->hdata->restrict_axi_burst_len) { + burst_len = chan->chip->dw->hdata->axi_rw_burst_len; + ctlhi |= CH_CTL_H_ARLEN_EN | CH_CTL_H_AWLEN_EN | + burst_len << CH_CTL_H_ARLEN_POS | + burst_len << CH_CTL_H_AWLEN_POS; + } + + hw_desc->lli->ctl_hi = cpu_to_le32(ctlhi); + + if (chan->direction == DMA_MEM_TO_DEV) { + write_desc_sar(hw_desc, mem_addr); + write_desc_dar(hw_desc, device_addr); + } else { + write_desc_sar(hw_desc, device_addr); + write_desc_dar(hw_desc, mem_addr); + } + + hw_desc->lli->block_ts_lo = cpu_to_le32(block_ts - 1); + + ctllo |= DWAXIDMAC_BURST_TRANS_LEN_4 << CH_CTL_L_DST_MSIZE_POS | + DWAXIDMAC_BURST_TRANS_LEN_4 << CH_CTL_L_SRC_MSIZE_POS; + hw_desc->lli->ctl_lo = cpu_to_le32(ctllo); + + set_desc_src_master(hw_desc); + + hw_desc->len = len; + return 0; +} + +static size_t calculate_block_len(struct axi_dma_chan *chan, + dma_addr_t dma_addr, size_t buf_len, + enum dma_transfer_direction direction) +{ + u32 data_width, reg_width, mem_width; + size_t axi_block_ts, block_len; + + axi_block_ts = chan->chip->dw->hdata->block_size[chan->id]; + + switch (direction) { + case DMA_MEM_TO_DEV: + data_width = BIT(chan->chip->dw->hdata->m_data_width); + mem_width = __ffs(data_width | dma_addr | buf_len); + if (mem_width > DWAXIDMAC_TRANS_WIDTH_32) + mem_width = DWAXIDMAC_TRANS_WIDTH_32; + + block_len = axi_block_ts << mem_width; + break; + case DMA_DEV_TO_MEM: + reg_width = __ffs(chan->config.src_addr_width); + block_len = axi_block_ts << reg_width; + break; + default: + block_len = 0; + } + + return block_len; +} + +static struct dma_async_tx_descriptor * +dw_axi_dma_chan_prep_cyclic(struct dma_chan *dchan, dma_addr_t dma_addr, + size_t buf_len, size_t period_len, + enum dma_transfer_direction direction, + unsigned long flags) +{ + struct axi_dma_chan *chan = dchan_to_axi_dma_chan(dchan); + struct axi_dma_hw_desc *hw_desc = NULL; + struct axi_dma_desc *desc = NULL; + dma_addr_t src_addr = dma_addr; + u32 num_periods, num_segments; + size_t axi_block_len; + u32 total_segments; + u32 segment_len; + unsigned int i; + int status; + u64 llp = 0; + u8 lms = 0; /* Select AXI0 master for LLI fetching */ + + num_periods = buf_len / period_len; + + axi_block_len = calculate_block_len(chan, dma_addr, buf_len, direction); + if (axi_block_len == 0) + return NULL; + + num_segments = DIV_ROUND_UP(period_len, axi_block_len); + segment_len = DIV_ROUND_UP(period_len, num_segments); + + total_segments = num_periods * num_segments; + + desc = axi_desc_alloc(total_segments); + if (unlikely(!desc)) + goto err_desc_get; + + chan->direction = direction; + desc->chan = chan; + chan->cyclic = true; + desc->length = 0; + desc->period_len = period_len; + + for (i = 0; i < total_segments; i++) { + hw_desc = &desc->hw_desc[i]; + + status = dw_axi_dma_set_hw_desc(chan, hw_desc, src_addr, + segment_len); + if (status < 0) + goto err_desc_get; + + desc->length += hw_desc->len; + /* Set end-of-link to the linked descriptor, so that cyclic + * callback function can be triggered during interrupt. + */ + set_desc_last(hw_desc); + + src_addr += segment_len; + } + + llp = desc->hw_desc[0].llp; + + /* Managed transfer list */ + do { + hw_desc = &desc->hw_desc[--total_segments]; + write_desc_llp(hw_desc, llp | lms); + llp = hw_desc->llp; + } while (total_segments); + + dw_axi_dma_set_hw_channel(chan, true); + + return vchan_tx_prep(&chan->vc, &desc->vd, flags); + +err_desc_get: + if (desc) + axi_desc_put(desc); + + return NULL; +} + +static struct dma_async_tx_descriptor * +dw_axi_dma_chan_prep_slave_sg(struct dma_chan *dchan, struct scatterlist *sgl, + unsigned int sg_len, + enum dma_transfer_direction direction, + unsigned long flags, void *context) +{ + struct axi_dma_chan *chan = dchan_to_axi_dma_chan(dchan); + struct axi_dma_hw_desc *hw_desc = NULL; + struct axi_dma_desc *desc = NULL; + u32 num_segments, segment_len; + unsigned int loop = 0; + struct scatterlist *sg; + size_t axi_block_len; + u32 len, num_sgs = 0; + unsigned int i; + dma_addr_t mem; + int status; + u64 llp = 0; + u8 lms = 0; /* Select AXI0 master for LLI fetching */ + + if (unlikely(!is_slave_direction(direction) || !sg_len)) + return NULL; + + mem = sg_dma_address(sgl); + len = sg_dma_len(sgl); + + axi_block_len = calculate_block_len(chan, mem, len, direction); + if (axi_block_len == 0) + return NULL; + + for_each_sg(sgl, sg, sg_len, i) + num_sgs += DIV_ROUND_UP(sg_dma_len(sg), axi_block_len); + + desc = axi_desc_alloc(num_sgs); + if (unlikely(!desc)) + goto err_desc_get; + + desc->chan = chan; + desc->length = 0; + chan->direction = direction; + + for_each_sg(sgl, sg, sg_len, i) { + mem = sg_dma_address(sg); + len = sg_dma_len(sg); + num_segments = DIV_ROUND_UP(sg_dma_len(sg), axi_block_len); + segment_len = DIV_ROUND_UP(sg_dma_len(sg), num_segments); + + do { + hw_desc = &desc->hw_desc[loop++]; + status = dw_axi_dma_set_hw_desc(chan, hw_desc, mem, segment_len); + if (status < 0) + goto err_desc_get; + + desc->length += hw_desc->len; + len -= segment_len; + mem += segment_len; + } while (len >= segment_len); + } + + /* Set end-of-link to the last link descriptor of list */ + set_desc_last(&desc->hw_desc[num_sgs - 1]); + + /* Managed transfer list */ + do { + hw_desc = &desc->hw_desc[--num_sgs]; + write_desc_llp(hw_desc, llp | lms); + llp = hw_desc->llp; + } while (num_sgs); + + dw_axi_dma_set_hw_channel(chan, true); + + return vchan_tx_prep(&chan->vc, &desc->vd, flags); + +err_desc_get: + if (desc) + axi_desc_put(desc); + + return NULL; +} + +static struct dma_async_tx_descriptor * +dma_chan_prep_dma_memcpy(struct dma_chan *dchan, dma_addr_t dst_adr, + dma_addr_t src_adr, size_t len, unsigned long flags) +{ + struct axi_dma_chan *chan = dchan_to_axi_dma_chan(dchan); + size_t block_ts, max_block_ts, xfer_len; + struct axi_dma_hw_desc *hw_desc = NULL; + struct axi_dma_desc *desc = NULL; + u32 xfer_width, reg, num; + u64 llp = 0; + u8 lms = 0; /* Select AXI0 master for LLI fetching */ + + dev_dbg(chan2dev(chan), "%s: memcpy: src: %pad dst: %pad length: %zd flags: %#lx", + axi_chan_name(chan), &src_adr, &dst_adr, len, flags); + + max_block_ts = chan->chip->dw->hdata->block_size[chan->id]; + xfer_width = axi_chan_get_xfer_width(chan, src_adr, dst_adr, len); + num = DIV_ROUND_UP(len, max_block_ts << xfer_width); + desc = axi_desc_alloc(num); + if (unlikely(!desc)) + goto err_desc_get; + + desc->chan = chan; + num = 0; + desc->length = 0; + while (len) { + xfer_len = len; + + hw_desc = &desc->hw_desc[num]; + /* + * Take care for the alignment. + * Actually source and destination widths can be different, but + * make them same to be simpler. + */ + xfer_width = axi_chan_get_xfer_width(chan, src_adr, dst_adr, xfer_len); + + /* + * block_ts indicates the total number of data of width + * to be transferred in a DMA block transfer. + * BLOCK_TS register should be set to block_ts - 1 + */ + block_ts = xfer_len >> xfer_width; + if (block_ts > max_block_ts) { + block_ts = max_block_ts; + xfer_len = max_block_ts << xfer_width; + } + + hw_desc->lli = axi_desc_get(chan, &hw_desc->llp); + if (unlikely(!hw_desc->lli)) + goto err_desc_get; + + write_desc_sar(hw_desc, src_adr); + write_desc_dar(hw_desc, dst_adr); + hw_desc->lli->block_ts_lo = cpu_to_le32(block_ts - 1); + + reg = CH_CTL_H_LLI_VALID; + if (chan->chip->dw->hdata->restrict_axi_burst_len) { + u32 burst_len = chan->chip->dw->hdata->axi_rw_burst_len; + + reg |= (CH_CTL_H_ARLEN_EN | + burst_len << CH_CTL_H_ARLEN_POS | + CH_CTL_H_AWLEN_EN | + burst_len << CH_CTL_H_AWLEN_POS); + } + hw_desc->lli->ctl_hi = cpu_to_le32(reg); + + reg = (DWAXIDMAC_BURST_TRANS_LEN_4 << CH_CTL_L_DST_MSIZE_POS | + DWAXIDMAC_BURST_TRANS_LEN_4 << CH_CTL_L_SRC_MSIZE_POS | + xfer_width << CH_CTL_L_DST_WIDTH_POS | + xfer_width << CH_CTL_L_SRC_WIDTH_POS | + DWAXIDMAC_CH_CTL_L_INC << CH_CTL_L_DST_INC_POS | + DWAXIDMAC_CH_CTL_L_INC << CH_CTL_L_SRC_INC_POS); + hw_desc->lli->ctl_lo = cpu_to_le32(reg); + + set_desc_src_master(hw_desc); + set_desc_dest_master(hw_desc, desc); + + hw_desc->len = xfer_len; + desc->length += hw_desc->len; + /* update the length and addresses for the next loop cycle */ + len -= xfer_len; + dst_adr += xfer_len; + src_adr += xfer_len; + num++; + } + + /* Set end-of-link to the last link descriptor of list */ + set_desc_last(&desc->hw_desc[num - 1]); + /* Managed transfer list */ + do { + hw_desc = &desc->hw_desc[--num]; + write_desc_llp(hw_desc, llp | lms); + llp = hw_desc->llp; + } while (num); + + return vchan_tx_prep(&chan->vc, &desc->vd, flags); + +err_desc_get: + if (desc) + axi_desc_put(desc); + return NULL; +} + +static int dw_axi_dma_chan_slave_config(struct dma_chan *dchan, + struct dma_slave_config *config) +{ + struct axi_dma_chan *chan = dchan_to_axi_dma_chan(dchan); + + memcpy(&chan->config, config, sizeof(*config)); + + return 0; +} + +static void axi_chan_dump_lli(struct axi_dma_chan *chan, + struct axi_dma_hw_desc *desc) +{ + if (!desc->lli) { + dev_err(dchan2dev(&chan->vc.chan), "NULL LLI\n"); + return; + } + + dev_err(dchan2dev(&chan->vc.chan), + "SAR: 0x%llx DAR: 0x%llx LLP: 0x%llx BTS 0x%x CTL: 0x%x:%08x", + le64_to_cpu(desc->lli->sar), + le64_to_cpu(desc->lli->dar), + le64_to_cpu(desc->lli->llp), + le32_to_cpu(desc->lli->block_ts_lo), + le32_to_cpu(desc->lli->ctl_hi), + le32_to_cpu(desc->lli->ctl_lo)); +} + +static void axi_chan_list_dump_lli(struct axi_dma_chan *chan, + struct axi_dma_desc *desc_head) +{ + int count = atomic_read(&chan->descs_allocated); + int i; + + for (i = 0; i < count; i++) + axi_chan_dump_lli(chan, &desc_head->hw_desc[i]); +} + +static noinline void axi_chan_handle_err(struct axi_dma_chan *chan, u32 status) +{ + struct virt_dma_desc *vd; + unsigned long flags; + + spin_lock_irqsave(&chan->vc.lock, flags); + + axi_chan_disable(chan); + + /* The bad descriptor currently is in the head of vc list */ + vd = vchan_next_desc(&chan->vc); + if (!vd) { + dev_err(chan2dev(chan), "BUG: %s, IRQ with no descriptors\n", + axi_chan_name(chan)); + goto out; + } + /* Remove the completed descriptor from issued list */ + list_del(&vd->node); + + /* WARN about bad descriptor */ + dev_err(chan2dev(chan), + "Bad descriptor submitted for %s, cookie: %d, irq: 0x%08x\n", + axi_chan_name(chan), vd->tx.cookie, status); + axi_chan_list_dump_lli(chan, vd_to_axi_desc(vd)); + + vchan_cookie_complete(vd); + + /* Try to restart the controller */ + axi_chan_start_first_queued(chan); + +out: + spin_unlock_irqrestore(&chan->vc.lock, flags); +} + +static void axi_chan_block_xfer_complete(struct axi_dma_chan *chan) +{ + int count = atomic_read(&chan->descs_allocated); + struct axi_dma_hw_desc *hw_desc; + struct axi_dma_desc *desc; + struct virt_dma_desc *vd; + unsigned long flags; + u64 llp; + int i; + + spin_lock_irqsave(&chan->vc.lock, flags); + if (unlikely(axi_chan_is_hw_enable(chan))) { + dev_err(chan2dev(chan), "BUG: %s caught DWAXIDMAC_IRQ_DMA_TRF, but channel not idle!\n", + axi_chan_name(chan)); + axi_chan_disable(chan); + } + + /* The completed descriptor currently is in the head of vc list */ + vd = vchan_next_desc(&chan->vc); + if (!vd) { + dev_err(chan2dev(chan), "BUG: %s, IRQ with no descriptors\n", + axi_chan_name(chan)); + goto out; + } + + if (chan->cyclic) { + desc = vd_to_axi_desc(vd); + if (desc) { + llp = lo_hi_readq(chan->chan_regs + CH_LLP); + for (i = 0; i < count; i++) { + hw_desc = &desc->hw_desc[i]; + if (hw_desc->llp == llp) { + axi_chan_irq_clear(chan, hw_desc->lli->status_lo); + hw_desc->lli->ctl_hi |= CH_CTL_H_LLI_VALID; + desc->completed_blocks = i; + + if (((hw_desc->len * (i + 1)) % desc->period_len) == 0) + vchan_cyclic_callback(vd); + break; + } + } + + axi_chan_enable(chan); + } + } else { + /* Remove the completed descriptor from issued list before completing */ + list_del(&vd->node); + vchan_cookie_complete(vd); + + /* Submit queued descriptors after processing the completed ones */ + axi_chan_start_first_queued(chan); + } + +out: + spin_unlock_irqrestore(&chan->vc.lock, flags); +} + +static irqreturn_t dw_axi_dma_interrupt(int irq, void *dev_id) +{ + struct axi_dma_chip *chip = dev_id; + struct dw_axi_dma *dw = chip->dw; + struct axi_dma_chan *chan; + + u32 status, i; + + /* Disable DMAC interrupts. We'll enable them after processing channels */ + axi_dma_irq_disable(chip); + + /* Poll, clear and process every channel interrupt status */ + for (i = 0; i < dw->hdata->nr_channels; i++) { + chan = &dw->chan[i]; + status = axi_chan_irq_read(chan); + axi_chan_irq_clear(chan, status); + + dev_vdbg(chip->dev, "%s %u IRQ status: 0x%08x\n", + axi_chan_name(chan), i, status); + + if (status & DWAXIDMAC_IRQ_ALL_ERR) + axi_chan_handle_err(chan, status); + else if (status & DWAXIDMAC_IRQ_DMA_TRF) + axi_chan_block_xfer_complete(chan); + } + + /* Re-enable interrupts */ + axi_dma_irq_enable(chip); + + return IRQ_HANDLED; +} + +static int dma_chan_terminate_all(struct dma_chan *dchan) +{ + struct axi_dma_chan *chan = dchan_to_axi_dma_chan(dchan); + u32 chan_active = BIT(chan->id) << DMAC_CHAN_EN_SHIFT; + unsigned long flags; + u32 val; + int ret; + LIST_HEAD(head); + + axi_chan_disable(chan); + + ret = readl_poll_timeout_atomic(chan->chip->regs + DMAC_CHEN, val, + !(val & chan_active), 1000, 50000); + if (ret == -ETIMEDOUT) + dev_warn(dchan2dev(dchan), + "%s failed to stop\n", axi_chan_name(chan)); + + if (chan->direction != DMA_MEM_TO_MEM) + dw_axi_dma_set_hw_channel(chan, false); + if (chan->direction == DMA_MEM_TO_DEV) + dw_axi_dma_set_byte_halfword(chan, false); + + spin_lock_irqsave(&chan->vc.lock, flags); + + vchan_get_all_descriptors(&chan->vc, &head); + + chan->cyclic = false; + spin_unlock_irqrestore(&chan->vc.lock, flags); + + vchan_dma_desc_free_list(&chan->vc, &head); + + dev_vdbg(dchan2dev(dchan), "terminated: %s\n", axi_chan_name(chan)); + + return 0; +} + +static int dma_chan_pause(struct dma_chan *dchan) +{ + struct axi_dma_chan *chan = dchan_to_axi_dma_chan(dchan); + unsigned long flags; + unsigned int timeout = 20; /* timeout iterations */ + u32 val; + + spin_lock_irqsave(&chan->vc.lock, flags); + + if (chan->chip->dw->hdata->reg_map_8_channels) { + val = axi_dma_ioread32(chan->chip, DMAC_CHEN); + val |= BIT(chan->id) << DMAC_CHAN_SUSP_SHIFT | + BIT(chan->id) << DMAC_CHAN_SUSP_WE_SHIFT; + axi_dma_iowrite32(chan->chip, DMAC_CHEN, val); + } else { + val = axi_dma_ioread32(chan->chip, DMAC_CHSUSPREG); + val |= BIT(chan->id) << DMAC_CHAN_SUSP2_SHIFT | + BIT(chan->id) << DMAC_CHAN_SUSP2_WE_SHIFT; + axi_dma_iowrite32(chan->chip, DMAC_CHSUSPREG, val); + } + + do { + if (axi_chan_irq_read(chan) & DWAXIDMAC_IRQ_SUSPENDED) + break; + + udelay(2); + } while (--timeout); + + axi_chan_irq_clear(chan, DWAXIDMAC_IRQ_SUSPENDED); + + chan->is_paused = true; + + spin_unlock_irqrestore(&chan->vc.lock, flags); + + return timeout ? 0 : -EAGAIN; +} + +/* Called in chan locked context */ +static inline void axi_chan_resume(struct axi_dma_chan *chan) +{ + u32 val; + + if (chan->chip->dw->hdata->reg_map_8_channels) { + val = axi_dma_ioread32(chan->chip, DMAC_CHEN); + val &= ~(BIT(chan->id) << DMAC_CHAN_SUSP_SHIFT); + val |= (BIT(chan->id) << DMAC_CHAN_SUSP_WE_SHIFT); + axi_dma_iowrite32(chan->chip, DMAC_CHEN, val); + } else { + val = axi_dma_ioread32(chan->chip, DMAC_CHSUSPREG); + val &= ~(BIT(chan->id) << DMAC_CHAN_SUSP2_SHIFT); + val |= (BIT(chan->id) << DMAC_CHAN_SUSP2_WE_SHIFT); + axi_dma_iowrite32(chan->chip, DMAC_CHSUSPREG, val); + } + + chan->is_paused = false; +} + +static int dma_chan_resume(struct dma_chan *dchan) +{ + struct axi_dma_chan *chan = dchan_to_axi_dma_chan(dchan); + unsigned long flags; + + spin_lock_irqsave(&chan->vc.lock, flags); + + if (chan->is_paused) + axi_chan_resume(chan); + + spin_unlock_irqrestore(&chan->vc.lock, flags); + + return 0; +} + +static int axi_dma_suspend(struct axi_dma_chip *chip) +{ + axi_dma_irq_disable(chip); + axi_dma_disable(chip); + + clk_disable_unprepare(chip->core_clk); + clk_disable_unprepare(chip->cfgr_clk); + + return 0; +} + +static int axi_dma_resume(struct axi_dma_chip *chip) +{ + int ret; + + ret = clk_prepare_enable(chip->cfgr_clk); + if (ret < 0) + return ret; + + ret = clk_prepare_enable(chip->core_clk); + if (ret < 0) + return ret; + + axi_dma_enable(chip); + axi_dma_irq_enable(chip); + + return 0; +} + +static int __maybe_unused axi_dma_runtime_suspend(struct device *dev) +{ + struct axi_dma_chip *chip = dev_get_drvdata(dev); + + return axi_dma_suspend(chip); +} + +static int __maybe_unused axi_dma_runtime_resume(struct device *dev) +{ + struct axi_dma_chip *chip = dev_get_drvdata(dev); + + return axi_dma_resume(chip); +} + +static struct dma_chan *dw_axi_dma_of_xlate(struct of_phandle_args *dma_spec, + struct of_dma *ofdma) +{ + struct dw_axi_dma *dw = ofdma->of_dma_data; + struct axi_dma_chan *chan; + struct dma_chan *dchan; + + dchan = dma_get_any_slave_channel(&dw->dma); + if (!dchan) + return NULL; + + chan = dchan_to_axi_dma_chan(dchan); + chan->hw_handshake_num = dma_spec->args[0]; + return dchan; +} + +static int parse_device_properties(struct axi_dma_chip *chip) +{ + struct device *dev = chip->dev; + u32 tmp, carr[DMAC_MAX_CHANNELS]; + int ret; + + ret = device_property_read_u32(dev, "dma-channels", &tmp); + if (ret) + return ret; + if (tmp == 0 || tmp > DMAC_MAX_CHANNELS) + return -EINVAL; + + chip->dw->hdata->nr_channels = tmp; + if (tmp <= DMA_REG_MAP_CH_REF) + chip->dw->hdata->reg_map_8_channels = true; + + ret = device_property_read_u32(dev, "snps,dma-masters", &tmp); + if (ret) + return ret; + if (tmp == 0 || tmp > DMAC_MAX_MASTERS) + return -EINVAL; + + chip->dw->hdata->nr_masters = tmp; + + ret = device_property_read_u32(dev, "snps,data-width", &tmp); + if (ret) + return ret; + if (tmp > DWAXIDMAC_TRANS_WIDTH_MAX) + return -EINVAL; + + chip->dw->hdata->m_data_width = tmp; + + ret = device_property_read_u32_array(dev, "snps,block-size", carr, + chip->dw->hdata->nr_channels); + if (ret) + return ret; + for (tmp = 0; tmp < chip->dw->hdata->nr_channels; tmp++) { + if (carr[tmp] == 0 || carr[tmp] > DMAC_MAX_BLK_SIZE) + return -EINVAL; + + chip->dw->hdata->block_size[tmp] = carr[tmp]; + } + + ret = device_property_read_u32_array(dev, "snps,priority", carr, + chip->dw->hdata->nr_channels); + if (ret) + return ret; + /* Priority value must be programmed within [0:nr_channels-1] range */ + for (tmp = 0; tmp < chip->dw->hdata->nr_channels; tmp++) { + if (carr[tmp] >= chip->dw->hdata->nr_channels) + return -EINVAL; + + chip->dw->hdata->priority[tmp] = carr[tmp]; + } + + /* axi-max-burst-len is optional property */ + ret = device_property_read_u32(dev, "snps,axi-max-burst-len", &tmp); + if (!ret) { + if (tmp > DWAXIDMAC_ARWLEN_MAX + 1) + return -EINVAL; + if (tmp < DWAXIDMAC_ARWLEN_MIN + 1) + return -EINVAL; + + chip->dw->hdata->restrict_axi_burst_len = true; + chip->dw->hdata->axi_rw_burst_len = tmp; + } + + return 0; +} + +static int dw_probe(struct platform_device *pdev) +{ + struct axi_dma_chip *chip; + struct dw_axi_dma *dw; + struct dw_axi_dma_hcfg *hdata; + struct reset_control *resets; + unsigned int flags; + u32 i; + int ret; + + chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL); + if (!chip) + return -ENOMEM; + + dw = devm_kzalloc(&pdev->dev, sizeof(*dw), GFP_KERNEL); + if (!dw) + return -ENOMEM; + + hdata = devm_kzalloc(&pdev->dev, sizeof(*hdata), GFP_KERNEL); + if (!hdata) + return -ENOMEM; + + chip->dw = dw; + chip->dev = &pdev->dev; + chip->dw->hdata = hdata; + + chip->irq = platform_get_irq(pdev, 0); + if (chip->irq < 0) + return chip->irq; + + chip->regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(chip->regs)) + return PTR_ERR(chip->regs); + + flags = (uintptr_t)of_device_get_match_data(&pdev->dev); + if (flags & AXI_DMA_FLAG_HAS_APB_REGS) { + chip->apb_regs = devm_platform_ioremap_resource(pdev, 1); + if (IS_ERR(chip->apb_regs)) + return PTR_ERR(chip->apb_regs); + } + + if (flags & AXI_DMA_FLAG_HAS_RESETS) { + resets = devm_reset_control_array_get_exclusive(&pdev->dev); + if (IS_ERR(resets)) + return PTR_ERR(resets); + + ret = reset_control_deassert(resets); + if (ret) + return ret; + } + + chip->dw->hdata->use_cfg2 = !!(flags & AXI_DMA_FLAG_USE_CFG2); + + chip->core_clk = devm_clk_get(chip->dev, "core-clk"); + if (IS_ERR(chip->core_clk)) + return PTR_ERR(chip->core_clk); + + chip->cfgr_clk = devm_clk_get(chip->dev, "cfgr-clk"); + if (IS_ERR(chip->cfgr_clk)) + return PTR_ERR(chip->cfgr_clk); + + ret = parse_device_properties(chip); + if (ret) + return ret; + + dw->chan = devm_kcalloc(chip->dev, hdata->nr_channels, + sizeof(*dw->chan), GFP_KERNEL); + if (!dw->chan) + return -ENOMEM; + + ret = devm_request_irq(chip->dev, chip->irq, dw_axi_dma_interrupt, + IRQF_SHARED, KBUILD_MODNAME, chip); + if (ret) + return ret; + + INIT_LIST_HEAD(&dw->dma.channels); + for (i = 0; i < hdata->nr_channels; i++) { + struct axi_dma_chan *chan = &dw->chan[i]; + + chan->chip = chip; + chan->id = i; + chan->chan_regs = chip->regs + COMMON_REG_LEN + i * CHAN_REG_LEN; + atomic_set(&chan->descs_allocated, 0); + + chan->vc.desc_free = vchan_desc_put; + vchan_init(&chan->vc, &dw->dma); + } + + /* Set capabilities */ + dma_cap_set(DMA_MEMCPY, dw->dma.cap_mask); + dma_cap_set(DMA_SLAVE, dw->dma.cap_mask); + dma_cap_set(DMA_CYCLIC, dw->dma.cap_mask); + + /* DMA capabilities */ + dw->dma.max_burst = hdata->axi_rw_burst_len; + dw->dma.src_addr_widths = AXI_DMA_BUSWIDTHS; + dw->dma.dst_addr_widths = AXI_DMA_BUSWIDTHS; + dw->dma.directions = BIT(DMA_MEM_TO_MEM); + dw->dma.directions |= BIT(DMA_MEM_TO_DEV) | BIT(DMA_DEV_TO_MEM); + dw->dma.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST; + + dw->dma.dev = chip->dev; + dw->dma.device_tx_status = dma_chan_tx_status; + dw->dma.device_issue_pending = dma_chan_issue_pending; + dw->dma.device_terminate_all = dma_chan_terminate_all; + dw->dma.device_pause = dma_chan_pause; + dw->dma.device_resume = dma_chan_resume; + + dw->dma.device_alloc_chan_resources = dma_chan_alloc_chan_resources; + dw->dma.device_free_chan_resources = dma_chan_free_chan_resources; + + dw->dma.device_prep_dma_memcpy = dma_chan_prep_dma_memcpy; + dw->dma.device_synchronize = dw_axi_dma_synchronize; + dw->dma.device_config = dw_axi_dma_chan_slave_config; + dw->dma.device_prep_slave_sg = dw_axi_dma_chan_prep_slave_sg; + dw->dma.device_prep_dma_cyclic = dw_axi_dma_chan_prep_cyclic; + + /* + * Synopsis DesignWare AxiDMA datasheet mentioned Maximum + * supported blocks is 1024. Device register width is 4 bytes. + * Therefore, set constraint to 1024 * 4. + */ + dw->dma.dev->dma_parms = &dw->dma_parms; + dma_set_max_seg_size(&pdev->dev, MAX_BLOCK_SIZE); + platform_set_drvdata(pdev, chip); + + pm_runtime_enable(chip->dev); + + /* + * We can't just call pm_runtime_get here instead of + * pm_runtime_get_noresume + axi_dma_resume because we need + * driver to work also without Runtime PM. + */ + pm_runtime_get_noresume(chip->dev); + ret = axi_dma_resume(chip); + if (ret < 0) + goto err_pm_disable; + + axi_dma_hw_init(chip); + + pm_runtime_put(chip->dev); + + ret = dmaenginem_async_device_register(&dw->dma); + if (ret) + goto err_pm_disable; + + /* Register with OF helpers for DMA lookups */ + ret = of_dma_controller_register(pdev->dev.of_node, + dw_axi_dma_of_xlate, dw); + if (ret < 0) + dev_warn(&pdev->dev, + "Failed to register OF DMA controller, fallback to MEM_TO_MEM mode\n"); + + dev_info(chip->dev, "DesignWare AXI DMA Controller, %d channels\n", + dw->hdata->nr_channels); + + return 0; + +err_pm_disable: + pm_runtime_disable(chip->dev); + + return ret; +} + +static int dw_remove(struct platform_device *pdev) +{ + struct axi_dma_chip *chip = platform_get_drvdata(pdev); + struct dw_axi_dma *dw = chip->dw; + struct axi_dma_chan *chan, *_chan; + u32 i; + + /* Enable clk before accessing to registers */ + clk_prepare_enable(chip->cfgr_clk); + clk_prepare_enable(chip->core_clk); + axi_dma_irq_disable(chip); + for (i = 0; i < dw->hdata->nr_channels; i++) { + axi_chan_disable(&chip->dw->chan[i]); + axi_chan_irq_disable(&chip->dw->chan[i], DWAXIDMAC_IRQ_ALL); + } + axi_dma_disable(chip); + + pm_runtime_disable(chip->dev); + axi_dma_suspend(chip); + + devm_free_irq(chip->dev, chip->irq, chip); + + of_dma_controller_free(chip->dev->of_node); + + list_for_each_entry_safe(chan, _chan, &dw->dma.channels, + vc.chan.device_node) { + list_del(&chan->vc.chan.device_node); + tasklet_kill(&chan->vc.task); + } + + return 0; +} + +static const struct dev_pm_ops dw_axi_dma_pm_ops = { + SET_RUNTIME_PM_OPS(axi_dma_runtime_suspend, axi_dma_runtime_resume, NULL) +}; + +static const struct of_device_id dw_dma_of_id_table[] = { + { + .compatible = "snps,axi-dma-1.01a" + }, { + .compatible = "intel,kmb-axi-dma", + .data = (void *)AXI_DMA_FLAG_HAS_APB_REGS, + }, { + .compatible = "starfive,jh7110-axi-dma", + .data = (void *)(AXI_DMA_FLAG_HAS_RESETS | AXI_DMA_FLAG_USE_CFG2), + }, + {} +}; +MODULE_DEVICE_TABLE(of, dw_dma_of_id_table); + +static struct platform_driver dw_driver = { + .probe = dw_probe, + .remove = dw_remove, + .driver = { + .name = KBUILD_MODNAME, + .of_match_table = dw_dma_of_id_table, + .pm = &dw_axi_dma_pm_ops, + }, +}; +module_platform_driver(dw_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("Synopsys DesignWare AXI DMA Controller platform driver"); +MODULE_AUTHOR("Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>"); diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac.h b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h new file mode 100644 index 0000000000..eb267cb24f --- /dev/null +++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac.h @@ -0,0 +1,400 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +// (C) 2017-2018 Synopsys, Inc. (www.synopsys.com) + +/* + * Synopsys DesignWare AXI DMA Controller driver. + * + * Author: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> + */ + +#ifndef _AXI_DMA_PLATFORM_H +#define _AXI_DMA_PLATFORM_H + +#include <linux/bitops.h> +#include <linux/clk.h> +#include <linux/device.h> +#include <linux/dmaengine.h> +#include <linux/types.h> + +#include "../virt-dma.h" + +#define DMAC_MAX_CHANNELS 16 +#define DMAC_MAX_MASTERS 2 +#define DMAC_MAX_BLK_SIZE 0x200000 + +struct dw_axi_dma_hcfg { + u32 nr_channels; + u32 nr_masters; + u32 m_data_width; + u32 block_size[DMAC_MAX_CHANNELS]; + u32 priority[DMAC_MAX_CHANNELS]; + /* maximum supported axi burst length */ + u32 axi_rw_burst_len; + /* Register map for DMAX_NUM_CHANNELS <= 8 */ + bool reg_map_8_channels; + bool restrict_axi_burst_len; + bool use_cfg2; +}; + +struct axi_dma_chan { + struct axi_dma_chip *chip; + void __iomem *chan_regs; + u8 id; + u8 hw_handshake_num; + atomic_t descs_allocated; + + struct dma_pool *desc_pool; + struct virt_dma_chan vc; + + struct axi_dma_desc *desc; + struct dma_slave_config config; + enum dma_transfer_direction direction; + bool cyclic; + /* these other elements are all protected by vc.lock */ + bool is_paused; +}; + +struct dw_axi_dma { + struct dma_device dma; + struct dw_axi_dma_hcfg *hdata; + struct device_dma_parameters dma_parms; + + /* channels */ + struct axi_dma_chan *chan; +}; + +struct axi_dma_chip { + struct device *dev; + int irq; + void __iomem *regs; + void __iomem *apb_regs; + struct clk *core_clk; + struct clk *cfgr_clk; + struct dw_axi_dma *dw; +}; + +/* LLI == Linked List Item */ +struct __packed axi_dma_lli { + __le64 sar; + __le64 dar; + __le32 block_ts_lo; + __le32 block_ts_hi; + __le64 llp; + __le32 ctl_lo; + __le32 ctl_hi; + __le32 sstat; + __le32 dstat; + __le32 status_lo; + __le32 status_hi; + __le32 reserved_lo; + __le32 reserved_hi; +}; + +struct axi_dma_hw_desc { + struct axi_dma_lli *lli; + dma_addr_t llp; + u32 len; +}; + +struct axi_dma_desc { + struct axi_dma_hw_desc *hw_desc; + + struct virt_dma_desc vd; + struct axi_dma_chan *chan; + u32 completed_blocks; + u32 length; + u32 period_len; +}; + +struct axi_dma_chan_config { + u8 dst_multblk_type; + u8 src_multblk_type; + u8 dst_per; + u8 src_per; + u8 tt_fc; + u8 prior; + u8 hs_sel_dst; + u8 hs_sel_src; +}; + +static inline struct device *dchan2dev(struct dma_chan *dchan) +{ + return &dchan->dev->device; +} + +static inline struct device *chan2dev(struct axi_dma_chan *chan) +{ + return &chan->vc.chan.dev->device; +} + +static inline struct axi_dma_desc *vd_to_axi_desc(struct virt_dma_desc *vd) +{ + return container_of(vd, struct axi_dma_desc, vd); +} + +static inline struct axi_dma_chan *vc_to_axi_dma_chan(struct virt_dma_chan *vc) +{ + return container_of(vc, struct axi_dma_chan, vc); +} + +static inline struct axi_dma_chan *dchan_to_axi_dma_chan(struct dma_chan *dchan) +{ + return vc_to_axi_dma_chan(to_virt_chan(dchan)); +} + + +#define COMMON_REG_LEN 0x100 +#define CHAN_REG_LEN 0x100 + +/* Common registers offset */ +#define DMAC_ID 0x000 /* R DMAC ID */ +#define DMAC_COMPVER 0x008 /* R DMAC Component Version */ +#define DMAC_CFG 0x010 /* R/W DMAC Configuration */ +#define DMAC_CHEN 0x018 /* R/W DMAC Channel Enable */ +#define DMAC_CHEN_L 0x018 /* R/W DMAC Channel Enable 00-31 */ +#define DMAC_CHEN_H 0x01C /* R/W DMAC Channel Enable 32-63 */ +#define DMAC_CHSUSPREG 0x020 /* R/W DMAC Channel Suspend */ +#define DMAC_CHABORTREG 0x028 /* R/W DMAC Channel Abort */ +#define DMAC_INTSTATUS 0x030 /* R DMAC Interrupt Status */ +#define DMAC_COMMON_INTCLEAR 0x038 /* W DMAC Interrupt Clear */ +#define DMAC_COMMON_INTSTATUS_ENA 0x040 /* R DMAC Interrupt Status Enable */ +#define DMAC_COMMON_INTSIGNAL_ENA 0x048 /* R/W DMAC Interrupt Signal Enable */ +#define DMAC_COMMON_INTSTATUS 0x050 /* R DMAC Interrupt Status */ +#define DMAC_RESET 0x058 /* R DMAC Reset Register1 */ + +/* DMA channel registers offset */ +#define CH_SAR 0x000 /* R/W Chan Source Address */ +#define CH_DAR 0x008 /* R/W Chan Destination Address */ +#define CH_BLOCK_TS 0x010 /* R/W Chan Block Transfer Size */ +#define CH_CTL 0x018 /* R/W Chan Control */ +#define CH_CTL_L 0x018 /* R/W Chan Control 00-31 */ +#define CH_CTL_H 0x01C /* R/W Chan Control 32-63 */ +#define CH_CFG 0x020 /* R/W Chan Configuration */ +#define CH_CFG_L 0x020 /* R/W Chan Configuration 00-31 */ +#define CH_CFG_H 0x024 /* R/W Chan Configuration 32-63 */ +#define CH_LLP 0x028 /* R/W Chan Linked List Pointer */ +#define CH_STATUS 0x030 /* R Chan Status */ +#define CH_SWHSSRC 0x038 /* R/W Chan SW Handshake Source */ +#define CH_SWHSDST 0x040 /* R/W Chan SW Handshake Destination */ +#define CH_BLK_TFR_RESUMEREQ 0x048 /* W Chan Block Transfer Resume Req */ +#define CH_AXI_ID 0x050 /* R/W Chan AXI ID */ +#define CH_AXI_QOS 0x058 /* R/W Chan AXI QOS */ +#define CH_SSTAT 0x060 /* R Chan Source Status */ +#define CH_DSTAT 0x068 /* R Chan Destination Status */ +#define CH_SSTATAR 0x070 /* R/W Chan Source Status Fetch Addr */ +#define CH_DSTATAR 0x078 /* R/W Chan Destination Status Fetch Addr */ +#define CH_INTSTATUS_ENA 0x080 /* R/W Chan Interrupt Status Enable */ +#define CH_INTSTATUS 0x088 /* R/W Chan Interrupt Status */ +#define CH_INTSIGNAL_ENA 0x090 /* R/W Chan Interrupt Signal Enable */ +#define CH_INTCLEAR 0x098 /* W Chan Interrupt Clear */ + +/* These Apb registers are used by Intel KeemBay SoC */ +#define DMAC_APB_CFG 0x000 /* DMAC Apb Configuration Register */ +#define DMAC_APB_STAT 0x004 /* DMAC Apb Status Register */ +#define DMAC_APB_DEBUG_STAT_0 0x008 /* DMAC Apb Debug Status Register 0 */ +#define DMAC_APB_DEBUG_STAT_1 0x00C /* DMAC Apb Debug Status Register 1 */ +#define DMAC_APB_HW_HS_SEL_0 0x010 /* DMAC Apb HW HS register 0 */ +#define DMAC_APB_HW_HS_SEL_1 0x014 /* DMAC Apb HW HS register 1 */ +#define DMAC_APB_LPI 0x018 /* DMAC Apb Low Power Interface Reg */ +#define DMAC_APB_BYTE_WR_CH_EN 0x01C /* DMAC Apb Byte Write Enable */ +#define DMAC_APB_HALFWORD_WR_CH_EN 0x020 /* DMAC Halfword write enables */ + +#define UNUSED_CHANNEL 0x3F /* Set unused DMA channel to 0x3F */ +#define DMA_APB_HS_SEL_BIT_SIZE 0x08 /* HW handshake bits per channel */ +#define DMA_APB_HS_SEL_MASK 0xFF /* HW handshake select masks */ +#define MAX_BLOCK_SIZE 0x1000 /* 1024 blocks * 4 bytes data width */ +#define DMA_REG_MAP_CH_REF 0x08 /* Channel count to choose register map */ + +/* DMAC_CFG */ +#define DMAC_EN_POS 0 +#define DMAC_EN_MASK BIT(DMAC_EN_POS) + +#define INT_EN_POS 1 +#define INT_EN_MASK BIT(INT_EN_POS) + +/* DMAC_CHEN */ +#define DMAC_CHAN_EN_SHIFT 0 +#define DMAC_CHAN_EN_WE_SHIFT 8 + +#define DMAC_CHAN_SUSP_SHIFT 16 +#define DMAC_CHAN_SUSP_WE_SHIFT 24 + +/* DMAC_CHEN2 */ +#define DMAC_CHAN_EN2_WE_SHIFT 16 + +/* DMAC_CHSUSP */ +#define DMAC_CHAN_SUSP2_SHIFT 0 +#define DMAC_CHAN_SUSP2_WE_SHIFT 16 + +/* CH_CTL_H */ +#define CH_CTL_H_ARLEN_EN BIT(6) +#define CH_CTL_H_ARLEN_POS 7 +#define CH_CTL_H_AWLEN_EN BIT(15) +#define CH_CTL_H_AWLEN_POS 16 + +enum { + DWAXIDMAC_ARWLEN_1 = 0, + DWAXIDMAC_ARWLEN_2 = 1, + DWAXIDMAC_ARWLEN_4 = 3, + DWAXIDMAC_ARWLEN_8 = 7, + DWAXIDMAC_ARWLEN_16 = 15, + DWAXIDMAC_ARWLEN_32 = 31, + DWAXIDMAC_ARWLEN_64 = 63, + DWAXIDMAC_ARWLEN_128 = 127, + DWAXIDMAC_ARWLEN_256 = 255, + DWAXIDMAC_ARWLEN_MIN = DWAXIDMAC_ARWLEN_1, + DWAXIDMAC_ARWLEN_MAX = DWAXIDMAC_ARWLEN_256 +}; + +#define CH_CTL_H_LLI_LAST BIT(30) +#define CH_CTL_H_LLI_VALID BIT(31) + +/* CH_CTL_L */ +#define CH_CTL_L_LAST_WRITE_EN BIT(30) + +#define CH_CTL_L_DST_MSIZE_POS 18 +#define CH_CTL_L_SRC_MSIZE_POS 14 + +enum { + DWAXIDMAC_BURST_TRANS_LEN_1 = 0, + DWAXIDMAC_BURST_TRANS_LEN_4, + DWAXIDMAC_BURST_TRANS_LEN_8, + DWAXIDMAC_BURST_TRANS_LEN_16, + DWAXIDMAC_BURST_TRANS_LEN_32, + DWAXIDMAC_BURST_TRANS_LEN_64, + DWAXIDMAC_BURST_TRANS_LEN_128, + DWAXIDMAC_BURST_TRANS_LEN_256, + DWAXIDMAC_BURST_TRANS_LEN_512, + DWAXIDMAC_BURST_TRANS_LEN_1024 +}; + +#define CH_CTL_L_DST_WIDTH_POS 11 +#define CH_CTL_L_SRC_WIDTH_POS 8 + +#define CH_CTL_L_DST_INC_POS 6 +#define CH_CTL_L_SRC_INC_POS 4 +enum { + DWAXIDMAC_CH_CTL_L_INC = 0, + DWAXIDMAC_CH_CTL_L_NOINC +}; + +#define CH_CTL_L_DST_MAST BIT(2) +#define CH_CTL_L_SRC_MAST BIT(0) + +/* CH_CFG_H */ +#define CH_CFG_H_PRIORITY_POS 17 +#define CH_CFG_H_DST_PER_POS 12 +#define CH_CFG_H_SRC_PER_POS 7 +#define CH_CFG_H_HS_SEL_DST_POS 4 +#define CH_CFG_H_HS_SEL_SRC_POS 3 +enum { + DWAXIDMAC_HS_SEL_HW = 0, + DWAXIDMAC_HS_SEL_SW +}; + +#define CH_CFG_H_TT_FC_POS 0 +enum { + DWAXIDMAC_TT_FC_MEM_TO_MEM_DMAC = 0, + DWAXIDMAC_TT_FC_MEM_TO_PER_DMAC, + DWAXIDMAC_TT_FC_PER_TO_MEM_DMAC, + DWAXIDMAC_TT_FC_PER_TO_PER_DMAC, + DWAXIDMAC_TT_FC_PER_TO_MEM_SRC, + DWAXIDMAC_TT_FC_PER_TO_PER_SRC, + DWAXIDMAC_TT_FC_MEM_TO_PER_DST, + DWAXIDMAC_TT_FC_PER_TO_PER_DST +}; + +/* CH_CFG_L */ +#define CH_CFG_L_DST_MULTBLK_TYPE_POS 2 +#define CH_CFG_L_SRC_MULTBLK_TYPE_POS 0 +enum { + DWAXIDMAC_MBLK_TYPE_CONTIGUOUS = 0, + DWAXIDMAC_MBLK_TYPE_RELOAD, + DWAXIDMAC_MBLK_TYPE_SHADOW_REG, + DWAXIDMAC_MBLK_TYPE_LL +}; + +/* CH_CFG2 */ +#define CH_CFG2_L_SRC_PER_POS 4 +#define CH_CFG2_L_DST_PER_POS 11 + +#define CH_CFG2_H_TT_FC_POS 0 +#define CH_CFG2_H_HS_SEL_SRC_POS 3 +#define CH_CFG2_H_HS_SEL_DST_POS 4 +#define CH_CFG2_H_PRIORITY_POS 20 + +/** + * DW AXI DMA channel interrupts + * + * @DWAXIDMAC_IRQ_NONE: Bitmask of no one interrupt + * @DWAXIDMAC_IRQ_BLOCK_TRF: Block transfer complete + * @DWAXIDMAC_IRQ_DMA_TRF: Dma transfer complete + * @DWAXIDMAC_IRQ_SRC_TRAN: Source transaction complete + * @DWAXIDMAC_IRQ_DST_TRAN: Destination transaction complete + * @DWAXIDMAC_IRQ_SRC_DEC_ERR: Source decode error + * @DWAXIDMAC_IRQ_DST_DEC_ERR: Destination decode error + * @DWAXIDMAC_IRQ_SRC_SLV_ERR: Source slave error + * @DWAXIDMAC_IRQ_DST_SLV_ERR: Destination slave error + * @DWAXIDMAC_IRQ_LLI_RD_DEC_ERR: LLI read decode error + * @DWAXIDMAC_IRQ_LLI_WR_DEC_ERR: LLI write decode error + * @DWAXIDMAC_IRQ_LLI_RD_SLV_ERR: LLI read slave error + * @DWAXIDMAC_IRQ_LLI_WR_SLV_ERR: LLI write slave error + * @DWAXIDMAC_IRQ_INVALID_ERR: LLI invalid error or Shadow register error + * @DWAXIDMAC_IRQ_MULTIBLKTYPE_ERR: Slave Interface Multiblock type error + * @DWAXIDMAC_IRQ_DEC_ERR: Slave Interface decode error + * @DWAXIDMAC_IRQ_WR2RO_ERR: Slave Interface write to read only error + * @DWAXIDMAC_IRQ_RD2RWO_ERR: Slave Interface read to write only error + * @DWAXIDMAC_IRQ_WRONCHEN_ERR: Slave Interface write to channel error + * @DWAXIDMAC_IRQ_SHADOWREG_ERR: Slave Interface shadow reg error + * @DWAXIDMAC_IRQ_WRONHOLD_ERR: Slave Interface hold error + * @DWAXIDMAC_IRQ_LOCK_CLEARED: Lock Cleared Status + * @DWAXIDMAC_IRQ_SRC_SUSPENDED: Source Suspended Status + * @DWAXIDMAC_IRQ_SUSPENDED: Channel Suspended Status + * @DWAXIDMAC_IRQ_DISABLED: Channel Disabled Status + * @DWAXIDMAC_IRQ_ABORTED: Channel Aborted Status + * @DWAXIDMAC_IRQ_ALL_ERR: Bitmask of all error interrupts + * @DWAXIDMAC_IRQ_ALL: Bitmask of all interrupts + */ +enum { + DWAXIDMAC_IRQ_NONE = 0, + DWAXIDMAC_IRQ_BLOCK_TRF = BIT(0), + DWAXIDMAC_IRQ_DMA_TRF = BIT(1), + DWAXIDMAC_IRQ_SRC_TRAN = BIT(3), + DWAXIDMAC_IRQ_DST_TRAN = BIT(4), + DWAXIDMAC_IRQ_SRC_DEC_ERR = BIT(5), + DWAXIDMAC_IRQ_DST_DEC_ERR = BIT(6), + DWAXIDMAC_IRQ_SRC_SLV_ERR = BIT(7), + DWAXIDMAC_IRQ_DST_SLV_ERR = BIT(8), + DWAXIDMAC_IRQ_LLI_RD_DEC_ERR = BIT(9), + DWAXIDMAC_IRQ_LLI_WR_DEC_ERR = BIT(10), + DWAXIDMAC_IRQ_LLI_RD_SLV_ERR = BIT(11), + DWAXIDMAC_IRQ_LLI_WR_SLV_ERR = BIT(12), + DWAXIDMAC_IRQ_INVALID_ERR = BIT(13), + DWAXIDMAC_IRQ_MULTIBLKTYPE_ERR = BIT(14), + DWAXIDMAC_IRQ_DEC_ERR = BIT(16), + DWAXIDMAC_IRQ_WR2RO_ERR = BIT(17), + DWAXIDMAC_IRQ_RD2RWO_ERR = BIT(18), + DWAXIDMAC_IRQ_WRONCHEN_ERR = BIT(19), + DWAXIDMAC_IRQ_SHADOWREG_ERR = BIT(20), + DWAXIDMAC_IRQ_WRONHOLD_ERR = BIT(21), + DWAXIDMAC_IRQ_LOCK_CLEARED = BIT(27), + DWAXIDMAC_IRQ_SRC_SUSPENDED = BIT(28), + DWAXIDMAC_IRQ_SUSPENDED = BIT(29), + DWAXIDMAC_IRQ_DISABLED = BIT(30), + DWAXIDMAC_IRQ_ABORTED = BIT(31), + DWAXIDMAC_IRQ_ALL_ERR = (GENMASK(21, 16) | GENMASK(14, 5)), + DWAXIDMAC_IRQ_ALL = GENMASK(31, 0) +}; + +enum { + DWAXIDMAC_TRANS_WIDTH_8 = 0, + DWAXIDMAC_TRANS_WIDTH_16, + DWAXIDMAC_TRANS_WIDTH_32, + DWAXIDMAC_TRANS_WIDTH_64, + DWAXIDMAC_TRANS_WIDTH_128, + DWAXIDMAC_TRANS_WIDTH_256, + DWAXIDMAC_TRANS_WIDTH_512, + DWAXIDMAC_TRANS_WIDTH_MAX = DWAXIDMAC_TRANS_WIDTH_512 +}; + +#endif /* _AXI_DMA_PLATFORM_H */ |