[PATCH 2/2] dma: Add Ingenic PDMA driver support
From: bin.yao
Date: Tue Feb 27 2024 - 20:33:57 EST
From: byao <bin.yao@xxxxxxxxxxx>
Add Ingenic PDMA controller support.
This module can be found on ingenic victory soc.
Signed-off-by: byao <bin.yao@xxxxxxxxxxx>
Signed-off-by: rick <rick.tyliu@xxxxxxxxxxx>
---
drivers/dma/Kconfig | 14 +
drivers/dma/Makefile | 1 +
drivers/dma/ingenic/Makefile | 1 +
drivers/dma/ingenic/ingenic_dma.c | 1053 +++++++++++++++++++++++++++++
drivers/dma/ingenic/ingenic_dma.h | 250 +++++++
5 files changed, 1319 insertions(+)
create mode 100644 drivers/dma/ingenic/Makefile
create mode 100644 drivers/dma/ingenic/ingenic_dma.c
create mode 100644 drivers/dma/ingenic/ingenic_dma.h
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index e928f2ca0f1e..3214c72aef31 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -179,6 +179,20 @@ config DMA_SUN6I
help
Support for the DMA engine first found in Allwinner A31 SoCs.
+config DMA_JZ4780
+ tristate "Ingenic JZ SoC DMA support"
+ select DMA_ENGINE
+ select DMA_VIRTUAL_CHANNELS
+ help
+ Support the DMA engine found on Ingenic Jz SoCs.
+
+config DMA_INGENIC_SOC
+ tristate "Ingenic SoC DMA support"
+ select DMA_ENGINE
+ select DMA_VIRTUAL_CHANNELS
+ help
+ Support the DMA engine found on Ingenic T41 SoCs.
+
config DW_AXI_DMAC
tristate "Synopsys DesignWare AXI DMA support"
depends on OF
diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
index dfd40d14e408..8a56175bbfbb 100644
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -83,6 +83,7 @@ obj-$(CONFIG_XGENE_DMA) += xgene-dma.o
obj-$(CONFIG_ST_FDMA) += st_fdma.o
obj-$(CONFIG_FSL_DPAA2_QDMA) += fsl-dpaa2-qdma/
obj-$(CONFIG_INTEL_LDMA) += lgm/
+obj-$(CONFIG_DMA_INGENIC_SOC) += ingenic/
obj-y += mediatek/
obj-y += qcom/
diff --git a/drivers/dma/ingenic/Makefile b/drivers/dma/ingenic/Makefile
new file mode 100644
index 000000000000..2028a6f0b0c8
--- /dev/null
+++ b/drivers/dma/ingenic/Makefile
@@ -0,0 +1 @@
+obj-y += ingenic_dma.o
diff --git a/drivers/dma/ingenic/ingenic_dma.c b/drivers/dma/ingenic/ingenic_dma.c
new file mode 100644
index 000000000000..066325e35a92
--- /dev/null
+++ b/drivers/dma/ingenic/ingenic_dma.c
@@ -0,0 +1,1053 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2016 Ingenic Semiconductor Co., Ltd.
+ * Author: cli <chen.li@xxxxxxxxxxx>
+ *
+ * Programmable DMA Controller Driver For Ingenic's SOC,
+ * such as X1000, and so on. (kernel.4.4)
+ *
+ * Author: cli <chen.li@xxxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/dmaengine.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/irq.h>
+#include <linux/device.h>
+#include <linux/of.h>
+#include <linux/of_dma.h>
+#include <linux/dmapool.h>
+#include "ingenic_dma.h"
+
+static void dump_dma(struct ingenic_dma_chan *master)
+{
+ pr_debug("CH_DSA = 0x%08x\n", readl(master->iomem + CH_DSA));
+ pr_debug("CH_DTA = 0x%08x\n", readl(master->iomem + CH_DTA));
+ pr_debug("CH_DTC = 0x%08x\n", readl(master->iomem + CH_DTC));
+ pr_debug("CH_DRT = 0x%08x\n", readl(master->iomem + CH_DRT));
+ pr_debug("CH_DCS = 0x%08x\n", readl(master->iomem + CH_DCS));
+ pr_debug("CH_DCM = 0x%08x\n", readl(master->iomem + CH_DCM));
+ pr_debug("CH_DDA = 0x%08x\n", readl(master->iomem + CH_DDA));
+ pr_debug("CH_DSD = 0x%08x\n", readl(master->iomem + CH_DSD));
+}
+
+static int dump_dma_hdesc(struct hdma_desc *desc, const char *d)
+{
+ int i;
+ unsigned long *p = (unsigned long *)desc;
+
+ pr_debug("%s(): %s\n", __func__, d);
+ for (i = 0; i < 8; i++)
+ pr_debug("\t%08lx\n", (unsigned long)*p++);
+
+ return 0;
+}
+
+void jzdma_dump(struct dma_chan *chan)
+{
+ struct ingenic_dma_chan *dmac = to_ingenic_dma_chan(chan);
+
+ dump_dma(dmac);
+}
+EXPORT_SYMBOL_GPL(jzdma_dump);
+
+/*tsz for 1,2,4,8,16,32,64 128bytes */
+static const char dcm_tsz[8] = { 1, 2, 0, 0, 3, 4, 5, 6};
+static inline unsigned int get_current_tsz(unsigned long dcmp)
+{
+ int i;
+ int val = (dcmp & DCM_TSZ_MSK) >> DCM_TSZ_SFT;
+
+ if (val == DCM_TSZ_AUTO)
+ return 0;
+
+ for (i = 0; i < ARRAY_SIZE(dcm_tsz); i++) {
+ if (val == dcm_tsz[i])
+ break;
+ }
+
+ return i;
+}
+
+static inline unsigned char get_max_tsz(unsigned long val, unsigned int *shift)
+{
+ int ord = ffs(val) - 1;
+
+ /*
+ * 8 byte transfer sizes unsupported so fall back on 4. If it's larger
+ * than the maximum, just limit it. It is perfectly safe to fall back
+ * in this way since we won't exceed the maximum burst size supported
+ * by the device, the only effect is reduced efficiency. This is better
+ * than refusing to perform the request at all.
+ */
+ if (ord == 3)
+ ord = 2;
+ else if (ord > 7)
+ ord = 7;
+
+ if (shift)
+ *shift = ord;
+
+ return dcm_tsz[ord];
+}
+
+static const struct of_device_id ingenic_dma_dt_match[];
+
+static struct ingenic_dma_engine *ingenic_dma_parse_dt(struct platform_device *pdev)
+{
+ const struct of_device_id *match;
+ struct ingenic_dma_engine *ingenic_dma;
+ u32 nr_chs;
+
+ if (!pdev->dev.of_node)
+ return ERR_PTR(-ENODEV);
+
+ match = of_match_node(ingenic_dma_dt_match, pdev->dev.of_node);
+ if (!match)
+ return ERR_PTR(-ENODEV);
+
+ if (of_property_read_u32(pdev->dev.of_node, "#dma-channels", &nr_chs))
+ nr_chs = 32;
+
+ ingenic_dma = devm_kzalloc(&pdev->dev, sizeof(*ingenic_dma) +
+ sizeof(struct ingenic_dma_chan *) * nr_chs, GFP_KERNEL);
+ if (!ingenic_dma)
+ return ERR_PTR(-ENOMEM);
+
+ ingenic_dma->dev = &pdev->dev;
+ ingenic_dma->nr_chs = nr_chs;
+ ingenic_dma->hwattr = (unsigned long)match->data;
+
+ /* Property is optional, if it doesn't exist the value will remain 0. */
+ of_property_read_u32(pdev->dev.of_node, "ingenic,reserved-chs",
+ &ingenic_dma->chan_reserved);
+
+ if (!of_property_read_u32(pdev->dev.of_node, "ingenic,programed-chs",
+ &ingenic_dma->chan_programed))
+ ingenic_dma->chan_reserved |= ingenic_dma->chan_programed;
+
+ if (HWATTR_SPECIAL_CH01_SUP(ingenic_dma->hwattr) &&
+ of_property_read_bool(pdev->dev.of_node,
+ "ingenic,special-chs")) {
+ ingenic_dma->chan_reserved |= DMA_SPECAIL_CHS;
+ ingenic_dma->chan_programed |= DMA_SPECAIL_CHS;
+ ingenic_dma->special_ch = true;
+ }
+
+ ingenic_dma->intc_ch = -1;
+ if (HWATTR_INTC_IRQ_SUP(ingenic_dma->hwattr) &&
+ !of_property_read_u32(pdev->dev.of_node,
+ "ingenic,intc-ch", (u32 *)&ingenic_dma->intc_ch)) {
+
+ if (ingenic_dma->intc_ch >= ingenic_dma->nr_chs)
+ ingenic_dma->intc_ch = (ingenic_dma->nr_chs - 1);
+
+ if (BIT(ingenic_dma->intc_ch) & ingenic_dma->chan_reserved)
+ dev_warn(ingenic_dma->dev,
+ "WARN: intc irq channel %d is already reserved\n",
+ ingenic_dma->intc_ch);
+
+ ingenic_dma->chan_reserved |= BIT(ingenic_dma->intc_ch);
+ }
+
+ return ingenic_dma;
+}
+
+static unsigned int build_one_desc(dma_addr_t saddr, dma_addr_t daddr,
+ unsigned int length, struct hdma_desc *desc)
+{
+ unsigned int len = length;
+ unsigned int tsz, transfer_shift;
+
+ if (length < DTC_TC_MSK) {
+ desc->dcm = DCM_DAI | DCM_SAI |
+ (DCM_TSZ_AUTO << DCM_TSZ_SFT) |
+ (DCM_RDIL_MAX << DCM_RDIL_SFT);
+ desc->dtc = len; /* DCM_TSZ_AUTO in bytes */
+ } else {
+ len = ALIGN_DOWN(len, sizeof(uint32_t));
+ tsz = get_max_tsz(len, &transfer_shift);
+ desc->dcm = DCM_DAI | DCM_SAI | tsz << DCM_TSZ_SFT;
+ desc->dtc = len >> transfer_shift; /* in burst unit */
+ barrier();
+ len = desc->dtc << transfer_shift;
+ }
+
+ desc->dsa = saddr;
+ desc->dta = daddr;
+ desc->sd = 0;
+ desc->drt = INGENIC_DMA_REQ_AUTO_TX;
+
+ return len;
+}
+
+static unsigned int build_one_slave_desc(struct ingenic_dma_chan *dmac, dma_addr_t addr,
+ unsigned int length,
+ enum dma_transfer_direction direction,
+ struct hdma_desc *desc)
+{
+ enum dma_transfer_direction dir;
+ unsigned int rdil;
+// unsigned int tsz, transfer_shift;
+
+ desc->dcm = dmac->dcm;
+ desc->drt = dmac->slave_id;
+ desc->sd = 0;
+
+ if ((direction != DMA_DEV_TO_MEM) && (direction != DMA_MEM_TO_DEV))
+ dir = dmac->direction;
+ else
+ dir = direction;
+
+ if (dir == DMA_DEV_TO_MEM) {
+ desc->dta = addr;
+ desc->dsa = dmac->slave_addr;
+ desc->dcm |= DCM_DAI;
+ } else {
+ desc->dsa = addr;
+ desc->dta = dmac->slave_addr;
+ desc->dcm |= DCM_SAI;
+ }
+
+ rdil = dmac->maxburst * dmac->transfer_width;
+ if (rdil > 4)
+ rdil = min((int)fls(rdil) + 1, (int)DCM_RDIL_MAX);
+
+ WARN_ON(length & (~DTC_TC_MSK));
+ if (WARN_ON(!IS_ALIGNED(length, dmac->transfer_width)))
+ desc->dtc = ALIGN_DOWN((length & DTC_TC_MSK), dmac->transfer_width);
+ else
+ desc->dtc = (length & DTC_TC_MSK);
+ desc->dcm |= DCM_TSZ_MSK | (rdil << DCM_RDIL_SFT);
+
+ return desc->dtc;
+}
+
+static void ingenic_dma_free_swdesc(struct virt_dma_desc *vd)
+{
+ struct ingenic_dma_sdesc *sdesc = to_ingenic_dma_sdesc(vd);
+ struct ingenic_dma_chan *dmac = sdesc->dmac;
+ unsigned long flags;
+ int i;
+
+ WARN_ON(!sdesc->dmac);
+
+ spin_lock_irqsave(&dmac->hdesc_lock, flags);
+
+ if (dmac->hdesc_pool) {
+ for (i = 0; i < sdesc->nb_desc; i++)
+ dma_pool_free(dmac->hdesc_pool, sdesc->hw_desc[i],
+ sdesc->hw_desc_dma[i]);
+ dmac->hdesc_num -= sdesc->nb_desc;
+ }
+
+ spin_unlock_irqrestore(&dmac->hdesc_lock, flags);
+
+ kfree(sdesc);
+}
+
+static struct ingenic_dma_sdesc *ingenic_dma_alloc_swdesc(struct ingenic_dma_chan *dmac,
+ int num_hdesc)
+{
+ struct ingenic_dma_sdesc *sdesc;
+ int i;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dmac->hdesc_lock, flags);
+
+ if (num_hdesc > (dmac->hdesc_max - dmac->hdesc_num) || !dmac->hdesc_pool) {
+ spin_unlock_irqrestore(&dmac->hdesc_lock, flags);
+
+ return NULL;
+ }
+
+ sdesc = kzalloc(sizeof(struct ingenic_dma_sdesc) +
+ num_hdesc * (sizeof(void **) + sizeof(dma_addr_t)),
+ GFP_NOWAIT);
+ if (!sdesc) {
+ spin_unlock_irqrestore(&dmac->hdesc_lock, flags);
+
+ return NULL;
+ }
+
+ sdesc->hw_desc = (struct hdma_desc **)(sdesc + 1);
+ sdesc->hw_desc_dma = (dma_addr_t *)(sdesc->hw_desc + num_hdesc);
+ sdesc->dmac = dmac;
+
+ for (i = 0; i < num_hdesc; i++) {
+ sdesc->hw_desc[i] = dma_pool_alloc(dmac->hdesc_pool, GFP_NOWAIT,
+ &sdesc->hw_desc_dma[i]);
+ //pr_debug("sdesc->hw_desc[%d] = %p, sdesc->hw_desc_dma[%d] = 0x%08x\n",
+ //i, sdesc->hw_desc[i],
+ //i, sdesc->hw_desc_dma[i]);
+ if (!sdesc->hw_desc[i]) {
+ dev_err(&dmac->vc.chan.dev->device,
+ "%s(): Couldn't allocate the hw_desc from dma_pool %p\n",
+ __func__, dmac->hdesc_pool);
+ spin_unlock_irqrestore(&dmac->hdesc_lock, flags);
+
+ goto err;
+ }
+ sdesc->nb_desc++;
+ }
+ dmac->hdesc_num += sdesc->nb_desc;
+ spin_unlock_irqrestore(&dmac->hdesc_lock, flags);
+
+ return sdesc;
+
+err:
+ ingenic_dma_free_swdesc(&sdesc->vd);
+
+ return NULL;
+}
+
+static struct dma_async_tx_descriptor *ingenic_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)
+{
+ struct ingenic_dma_chan *dmac = to_ingenic_dma_chan(chan);
+ struct ingenic_dma_sdesc *sdesc;
+ int i;
+
+ sdesc = ingenic_dma_alloc_swdesc(dmac, sg_len);
+ if (!sdesc)
+ return NULL;
+
+ for (i = 0; i < sg_len; i++) {
+ sdesc->len += build_one_slave_desc(dmac, sg_dma_address(&sgl[i]),
+ sg_dma_len(&sgl[i]), direction, sdesc->hw_desc[i]);
+ if (i) {
+ sdesc->hw_desc[i - 1]->dcm |= DCM_LINK;
+ sdesc->hw_desc[i - 1]->dtc |= PHY_TO_DESC_DOA(sdesc->hw_desc_dma[i]);
+ }
+ }
+ sdesc->hw_desc[i - 1]->dcm |= DCM_TIE;
+ sdesc->cyclic = false;
+ sdesc->dcs = DCS_DES8;
+
+ return vchan_tx_prep(&dmac->vc, &sdesc->vd, flags);
+}
+
+static struct dma_async_tx_descriptor *ingenic_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)
+{
+ struct ingenic_dma_chan *dmac = to_ingenic_dma_chan(chan);
+ unsigned int periods = buf_len / period_len;
+ struct ingenic_dma_sdesc *sdesc;
+ int i;
+
+ sdesc = ingenic_dma_alloc_swdesc(dmac, periods);
+ if (!sdesc)
+ return NULL;
+
+ for (i = 0; i < periods; i++) {
+ sdesc->len += build_one_slave_desc(dmac, buf_addr + (i * period_len),
+ period_len, direction, sdesc->hw_desc[i]);
+
+ if (i) {
+ sdesc->hw_desc[i - 1]->dcm |= DCM_LINK | DCM_TIE;
+ sdesc->hw_desc[i - 1]->dtc |= PHY_TO_DESC_DOA(sdesc->hw_desc_dma[i]);
+ }
+
+ }
+
+ sdesc->hw_desc[i - 1]->dcm |= DCM_LINK | DCM_TIE;
+ sdesc->hw_desc[i - 1]->dtc |= PHY_TO_DESC_DOA(sdesc->hw_desc_dma[0]);
+ sdesc->cyclic = true;
+ sdesc->dcs = DCS_DES8;
+
+ return vchan_tx_prep(&dmac->vc, &sdesc->vd, flags);
+}
+
+static struct dma_async_tx_descriptor *ingenic_dma_prep_dma_memcpy(
+ struct dma_chan *chan, dma_addr_t dma_dest, dma_addr_t dma_src,
+ size_t len, unsigned long flags)
+{
+ struct ingenic_dma_chan *dmac = to_ingenic_dma_chan(chan);
+ struct ingenic_dma_sdesc *sdesc;
+
+ sdesc = ingenic_dma_alloc_swdesc(dmac, 1);
+ if (!sdesc)
+ return NULL;
+
+ sdesc->len = build_one_desc(dma_src, dma_dest, len, sdesc->hw_desc[0]);
+ sdesc->hw_desc[0]->dcm |= DCM_TIE;
+ sdesc->cyclic = false;
+ sdesc->dcs = DCS_DES8;
+
+ return vchan_tx_prep(&dmac->vc, &sdesc->vd, flags);
+}
+
+static size_t ingenic_dma_desc_residue(struct ingenic_dma_chan *dmac,
+ struct ingenic_dma_sdesc *sdesc)
+{
+ unsigned int residue = 0, shift, pass = 0;
+ unsigned int i;
+ bool dsa = false;
+ dma_addr_t start, end, compare;
+
+ if (sdesc->hw_desc[0]->dcm & DCM_SAI) {
+ compare = readl(dmac->iomem + CH_DSA);
+ dsa = true;
+ } else {
+ compare = readl(dmac->iomem + CH_DTA);
+ }
+
+ for (i = 0; i < sdesc->nb_desc; i++) {
+ start = dsa ? sdesc->hw_desc[i]->dsa : sdesc->hw_desc[i]->dta;
+ shift = get_current_tsz(sdesc->hw_desc[i]->dcm);
+ end = start + (sdesc->hw_desc[i]->dtc << shift);
+
+ if (!(start <= compare && end > compare)) {
+ pass += sdesc->hw_desc[i]->dtc << shift;
+ } else {
+ pass += (compare - start);
+ break;
+
+ }
+
+ }
+
+ residue = sdesc->len - pass;
+
+ return residue;
+}
+
+static enum dma_status ingenic_dma_tx_status(struct dma_chan *chan,
+ dma_cookie_t cookie,
+ struct dma_tx_state *txstate)
+{
+ struct ingenic_dma_chan *dmac = to_ingenic_dma_chan(chan);
+ struct virt_dma_desc *vd;
+ enum dma_status status;
+ unsigned long flags;
+
+ status = dma_cookie_status(chan, cookie, txstate);
+ if ((status == DMA_COMPLETE) || (txstate == NULL))
+ return status;
+
+ spin_lock_irqsave(&dmac->vc.lock, flags);
+
+ vd = vchan_find_desc(&dmac->vc, cookie);
+ if (vd)
+ dma_set_residue(txstate, to_ingenic_dma_sdesc(vd)->len);
+ else if (dmac->sdesc && cookie == dmac->sdesc->vd.tx.cookie)
+ dma_set_residue(txstate, ingenic_dma_desc_residue(dmac, dmac->sdesc));
+ else
+ dma_set_residue(txstate, 0);
+
+ spin_unlock_irqrestore(&dmac->vc.lock, flags);
+
+ return status;
+}
+
+static void ingenic_dma_start_trans(struct ingenic_dma_chan *dmac)
+{
+ struct virt_dma_desc *vd = NULL;
+ struct ingenic_dma_sdesc *sdesc;
+ int i, j;
+
+ if (!dmac->sdesc) {
+ vd = vchan_next_desc(&dmac->vc);
+ if (!vd)
+ return;
+
+ list_del(&vd->node);
+
+ sdesc = dmac->sdesc = to_ingenic_dma_sdesc(vd);
+
+ if (dmac->fake_cyclic && sdesc->cyclic && vd->tx.callback) {
+ /*
+ * The DMA controller doesn't support triggering an interrupt
+ * after processing each descriptor, only after processing an
+ * entire terminated list of descriptors.For a cyclic DMA
+ * setup the list of descriptors is not terminated so we can
+ * never get an interrupt.
+ *
+ * If the user requested a callback for a cyclic DMA setup then
+ * we workaround this hardware limitation here by degrading to
+ * a set of unlinked descriptors which we will submit in
+ * sequence in response to the completion of processing the
+ * previous descriptor
+ */
+ for (i = 0; i < sdesc->nb_desc; i++)
+ sdesc->hw_desc[i]->dcm &= ~DCM_LINK;
+ }
+
+ for (i = 0; i < sdesc->nb_desc; i++) {
+ uint32_t *vaddr = (void *)sdesc->hw_desc[i];
+
+ for (j = 0; j < 8; j++)
+ pr_debug("<%d>: &vaddr[0] %p vaddr[0] %x\n", i, &vaddr[j],
+ vaddr[j]);
+
+ //pr_debug("sdesc->hw_desc_dma[0] 0x%08x dmac->iomem %p\n",
+ //sdesc->hw_desc_dma[i], dmac->iomem);
+ }
+
+ sdesc->curr_desc = 0;
+ sdesc->status = STAT_RUNNING;
+ } else {
+ sdesc = dmac->sdesc;
+ WARN_ON_ONCE((!sdesc->cyclic));
+ WARN_ON_ONCE((!vd->tx.callback));
+ WARN_ON_ONCE((!dmac->fake_cyclic));
+ sdesc->status = STAT_RUNNING;
+ sdesc->curr_desc++;
+ sdesc->curr_desc = sdesc->curr_desc % sdesc->nb_desc;
+ }
+
+ dump_dma_hdesc(sdesc->hw_desc[sdesc->curr_desc], __func__);
+ /* dma descriptor address */
+ writel(sdesc->hw_desc_dma[sdesc->curr_desc], dmac->iomem + CH_DDA);
+ /* initiate descriptor fetch */
+ writel(BIT(dmac->id), dmac->engine->iomem + DDRS);
+ /* transfer start */
+ dev_dbg(chan2dev(&dmac->vc.chan), "dcs:%x start transfer\n",
+ readl(dmac->iomem + CH_DCS));
+
+ writel(sdesc->dcs | DCS_CTE, dmac->iomem + CH_DCS);
+}
+
+static void ingenic_dma_issue_pending(struct dma_chan *chan)
+{
+ struct ingenic_dma_chan *dmac = to_ingenic_dma_chan(chan);
+ unsigned long flags;
+
+ spin_lock_irqsave(&dmac->vc.lock, flags);
+
+ if (vchan_issue_pending(&dmac->vc) && !dmac->sdesc)
+ ingenic_dma_start_trans(dmac);
+
+ spin_unlock_irqrestore(&dmac->vc.lock, flags);
+}
+
+static int ingenic_dma_terminate_all(struct dma_chan *chan)
+{
+ struct ingenic_dma_chan *dmac = to_ingenic_dma_chan(chan);
+ unsigned long flags;
+ int ret = 0, i;
+
+ LIST_HEAD(head);
+
+ spin_lock_irqsave(&dmac->vc.lock, flags);
+
+ /* the part handler audio driver */
+ if (dmac->slave_id == INGENIC_DMA_REQ_AIC_LOOP_RX ||
+ dmac->slave_id == INGENIC_DMA_REQ_AIC_TX ||
+ dmac->slave_id == INGENIC_DMA_REQ_AIC_F_RX) {
+
+ if (dmac->sdesc) { /*DMA transfer is running*/
+ if (dmac->sdesc->status != STAT_STOPPED) {
+ dmac->sdesc->status = STAT_STOPPED;
+ writel(0, dmac->iomem + CH_DCS);
+ }
+
+ ingenic_dma_free_swdesc(&dmac->sdesc->vd);
+ dmac->sdesc = NULL;
+ }
+
+ goto done;
+ }
+
+ if (dmac->sdesc) { /*DMA transfer is running*/
+ ret = -EBUSY;
+
+ if (dmac->sdesc->status != STAT_STOPPED) {
+ dmac->sdesc->status = STAT_STOPPED;
+ reinit_completion(&dmac->completion);
+
+ for (i = 0; i < dmac->sdesc->nb_desc; i++) {
+ dmac->sdesc->hw_desc[i]->dcm |= DCM_TIE;
+ dmac->sdesc->hw_desc[i]->dcm &= ~DCM_LINK;
+ }
+
+ if (HWATTR_DESC_INTER_SUP(dmac->engine->hwattr)) {
+ /*
+ * The version of controller support descriptor interrupt
+ * can clear LINK on runtime
+ */
+ unsigned int dcm = readl(dmac->iomem + CH_DCM);
+
+ if (dcm & DCM_LINK) {
+ dcm &= ~DCM_LINK;
+ writel(dcm, dmac->iomem + CH_DCM);
+ }
+
+ }
+
+ } else if (readl(dmac->iomem + CH_DRT) != INGENIC_DMA_REQ_AUTO_TX) {
+ writel(0, dmac->iomem + CH_DCS);
+ ingenic_dma_free_swdesc(&dmac->sdesc->vd);
+ dmac->sdesc = NULL;
+ complete(&dmac->completion);
+ ret = 0;
+ }
+ } else {
+ writel(0, dmac->iomem + CH_DCS);
+ }
+
+done:
+ vchan_get_all_descriptors(&dmac->vc, &head);
+ spin_unlock_irqrestore(&dmac->vc.lock, flags);
+ vchan_dma_desc_free_list(&dmac->vc, &head);
+
+ return ret;
+}
+
+static int ingenic_dma_wait_terminate_complete(struct dma_chan *chan)
+{
+ struct ingenic_dma_chan *dmac = to_ingenic_dma_chan(chan);
+
+ if (dmac->sdesc)
+ wait_for_completion(&dmac->completion);
+
+ return 0;
+}
+
+static int ingenic_dma_config(struct dma_chan *chan,
+ struct dma_slave_config *config)
+{
+ struct ingenic_dma_chan *dmac = to_ingenic_dma_chan(chan);
+ enum dma_slave_buswidth transfer_width;
+
+ if (!config)
+ return -EINVAL;
+
+ switch (config->direction) {
+ case DMA_MEM_TO_DEV:
+ if (!config->dst_addr_width || !config->dst_addr)
+ return -EINVAL;
+ if (!config->dst_maxburst)
+ config->dst_maxburst = 1;
+ transfer_width = config->dst_addr_width;
+ dmac->slave_addr = config->dst_addr;
+ dmac->maxburst = config->dst_maxburst;
+ break;
+ case DMA_DEV_TO_MEM:
+ if (!config->src_addr_width || !config->src_addr)
+ return -EINVAL;
+ if (!config->src_maxburst)
+ config->src_maxburst = 1;
+ transfer_width = config->src_addr_width;
+ dmac->slave_addr = config->src_addr;
+ dmac->maxburst = config->src_maxburst;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (transfer_width) {
+ case DMA_SLAVE_BUSWIDTH_1_BYTE:
+ dmac->dcm = DCM_PORT_8;
+ dmac->transfer_width = 1;
+ break;
+ case DMA_SLAVE_BUSWIDTH_2_BYTES:
+ dmac->dcm = DCM_PORT_16;
+ dmac->transfer_width = 2;
+ break;
+ case DMA_SLAVE_BUSWIDTH_4_BYTES:
+ dmac->dcm = DCM_PORT_32;
+ dmac->transfer_width = 4;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* must be delete it */
+ //if (config->slave_id & INGENIC_DMA_TYPE_REQ_MSK)
+ // dmac->slave_id = config->slave_id & INGENIC_DMA_TYPE_REQ_MSK;
+
+ return 0;
+}
+
+static void pdma_handle_chan_irq(struct ingenic_dma_engine *ingenic_dma, int ch_id)
+{
+ struct ingenic_dma_chan *dmac = ingenic_dma->chan[ch_id];
+ struct ingenic_dma_sdesc *sdesc;
+ unsigned int dcs;
+
+ spin_lock(&dmac->vc.lock);
+
+ dcs = readl(dmac->iomem + CH_DCS);
+ writel(0, dmac->iomem + CH_DCS);
+
+ if (dcs & DCS_AR)
+ dev_warn(&dmac->vc.chan.dev->device,
+ "address error (DCS=0x%x)\n", dcs);
+
+ if (dcs & DCS_HLT)
+ dev_warn(&dmac->vc.chan.dev->device,
+ "channel halt (DCS=0x%x)\n", dcs);
+ sdesc = dmac->sdesc;
+ if (sdesc) {
+ if (sdesc->status == STAT_STOPPED) {
+ dma_cookie_complete(&sdesc->vd.tx);
+ ingenic_dma_free_swdesc(&sdesc->vd);
+ complete(&dmac->completion);
+ } else if (dmac->fake_cyclic && sdesc->cyclic) {
+ vchan_cyclic_callback(&sdesc->vd);
+ } else {
+ vchan_cookie_complete(&sdesc->vd);
+ }
+ dmac->sdesc = NULL;
+ ingenic_dma_start_trans(dmac);
+ } else {
+ dev_warn(&dmac->vc.chan.dev->device,
+ "channel irq with no active transfer, channel stop\n");
+ }
+
+ spin_unlock(&dmac->vc.lock);
+}
+
+static irqreturn_t pdma_int_handler(int irq, void *dev)
+{
+ struct ingenic_dma_engine *ingenic_dma = (struct ingenic_dma_engine *)dev;
+ unsigned long pending, dmac;
+ int i;
+
+ pending = readl(ingenic_dma->iomem + DIRQP);
+ writel(~pending, ingenic_dma->iomem + DIRQP);
+
+ for (i = 0; i < ingenic_dma->nr_chs ; i++) {
+ if (!(pending & (1 << i)))
+ continue;
+ pdma_handle_chan_irq(ingenic_dma, i);
+ }
+
+ dmac = readl(ingenic_dma->iomem + DMAC);
+ dmac &= ~(DMAC_HLT | DMAC_AR);
+ writel(dmac, ingenic_dma->iomem + DMAC);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t pdmam_int_handler(int irq, void *dev)
+{
+ /*TODO*/
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t pdmad_int_handler(int irq, void *dev)
+{
+ struct ingenic_dma_engine *ingenic_dma = (struct ingenic_dma_engine *)dev;
+ unsigned long pending;
+ int i;
+
+ pending = readl(ingenic_dma->iomem + DIP);
+ writel(readl(ingenic_dma->iomem + DIP) & (~pending), ingenic_dma->iomem + DIC);
+
+ for (i = 0; i < ingenic_dma->nr_chs; i++) {
+ struct ingenic_dma_chan *dmac = ingenic_dma->chan[i];
+ struct ingenic_dma_sdesc *sdesc;
+
+ if (!(pending & (1 << i)))
+ continue;
+ sdesc = dmac->sdesc;
+ if (sdesc && sdesc->cyclic) {
+ spin_lock(&dmac->vc.lock);
+ vchan_cyclic_callback(&sdesc->vd);
+ spin_unlock(&dmac->vc.lock);
+ }
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int ingenic_dma_alloc_chan_resources(struct dma_chan *chan)
+{
+ struct ingenic_dma_chan *dmac = to_ingenic_dma_chan(chan);
+
+ dmac->hdesc_pool = dma_pool_create(dev_name(&chan->dev->device),
+ chan->device->dev, sizeof(struct hdma_desc), 0, PAGE_SIZE);
+ if (!dmac->hdesc_pool) {
+ dev_err(&chan->dev->device,
+ "failed to allocate descriptor pool\n");
+ return -ENOMEM;
+ }
+
+ dmac->hdesc_max = PAGE_SIZE / sizeof(struct hdma_desc);
+ dmac->hdesc_num = 0;
+
+ return 0;
+}
+
+static void ingenic_dma_synchronize(struct dma_chan *chan)
+{
+ struct ingenic_dma_chan *dmac = to_ingenic_dma_chan(chan);
+
+ vchan_synchronize(&dmac->vc);
+}
+
+static void ingenic_dma_free_chan_resources(struct dma_chan *chan)
+{
+ struct ingenic_dma_chan *dmac = to_ingenic_dma_chan(chan);
+ unsigned long flags;
+
+ ingenic_dma_terminate_all(chan);
+
+ ingenic_dma_wait_terminate_complete(chan);
+
+ dma_pool_destroy(dmac->hdesc_pool);
+ spin_lock_irqsave(&dmac->hdesc_lock, flags);
+ dmac->hdesc_pool = NULL;
+ dmac->hdesc_max = 0;
+ dmac->hdesc_num = 0;
+ spin_unlock_irqrestore(&dmac->hdesc_lock, flags);
+}
+
+static bool ingenic_dma_filter_fn(struct dma_chan *chan, void *param)
+{
+ struct ingenic_dma_chan *dmac = to_ingenic_dma_chan(chan);
+ unsigned int private = *(unsigned int *)param;
+ unsigned long type = (unsigned long)chan->private;
+ int channel = -1;
+
+ if (private & INGENIC_DMA_TYPE_CH_EN) {
+ channel = (private & INGENIC_DMA_TYPE_CH_MSK) >> INGENIC_DMA_TYPE_CH_SFT;
+ if (dmac->id == channel) {
+ dev_info(&chan->dev->device,
+ "assignment channel is %d\n", channel);
+ return true;
+ }
+ return false;
+ }
+
+ if (dmac->engine->chan_reserved & BIT(dmac->id))
+ return false;
+
+ if ((private & INGENIC_DMA_TYPE_REQ_MSK) != type)
+ return false;
+
+ dmac->slave_id = private & INGENIC_DMA_TYPE_REQ_MSK;
+
+ return true;
+}
+
+static struct of_dma_filter_info of_ingenic_dma_info = {
+ .filter_fn = ingenic_dma_filter_fn,
+};
+
+static int ingenic_dma_chan_init(struct ingenic_dma_engine *dma, int id)
+{
+ struct ingenic_dma_chan *dmac = NULL;
+
+ if ((id < 0) || (id >= INGENIC_DMA_CHAN_CNT))
+ return -EINVAL;
+
+ dmac = devm_kzalloc(dma->dev, sizeof(*dmac), GFP_KERNEL);
+ if (!dmac)
+ return -ENOMEM;
+
+ dmac->id = id;
+ dmac->iomem = dma->iomem + dmac->id * DMACH_OFF;
+ dmac->engine = dma;
+ dmac->fake_cyclic = HWATTR_DESC_INTER_SUP(dma->hwattr) ? false : true;
+
+ spin_lock_init(&dmac->hdesc_lock);
+ init_completion(&dmac->completion);
+
+ vchan_init(&dmac->vc, &dma->dma_device);
+
+ dmac->vc.desc_free = ingenic_dma_free_swdesc;
+ dmac->vc.chan.private = (void *)pdma_maps[id];
+ dmac->slave_id = pdma_maps[id] & INGENIC_DMA_TYPE_REQ_MSK;
+ dma->chan[id] = dmac;
+
+ return 0;
+}
+
+static int __init ingenic_dma_probe(struct platform_device *pdev)
+{
+ struct ingenic_dma_engine *dma = NULL;
+ struct resource *iores;
+ u32 reg_dmac = DMAC_DMAE;
+ int i, ret = 0;
+
+ /* check of first. if of failed, use platform */
+
+ dma = ingenic_dma_parse_dt(pdev);
+ if (IS_ERR(dma))
+ return PTR_ERR(dma);
+
+ iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ dma->iomem = devm_ioremap_resource(&pdev->dev, iores);
+ if (IS_ERR(dma->iomem))
+ return PTR_ERR(dma->iomem);
+
+ /* PDMA interrupt*/
+ dma->irq_pdma = platform_get_irq_byname(pdev, "pdma");
+ if (dma->irq_pdma < 0)
+ return dma->irq_pdma;
+
+ ret = devm_request_irq(&pdev->dev, dma->irq_pdma, pdma_int_handler,
+ 0, "pdma", dma);
+ if (ret)
+ return ret;
+
+ /* PDMA mcu interrupt*/
+ dma->irq_pdmam = platform_get_irq_byname(pdev, "pdmam");
+ if (dma->irq_pdmam >= 0) {
+ ret = devm_request_irq(&pdev->dev, dma->irq_pdmam, pdmam_int_handler,
+ 0, "pdmam", dma);
+ if (ret)
+ return ret;
+ }
+
+ /* PDMA descriptor interrupt */
+ if (HWATTR_DESC_INTER_SUP(dma->hwattr)) {
+ dma->irq_pdmad = platform_get_irq_byname(pdev, "pdmad");
+ if (dma->irq_pdmad < 0) {
+ dev_err(&pdev->dev, "unable to get pdmad irq\n");
+ return dma->irq_pdmad;
+ }
+ ret = devm_request_irq(&pdev->dev, dma->irq_pdmad, pdmad_int_handler,
+ 0, "pdmad", dma);
+ if (ret)
+ return ret;
+ }
+
+ /* Initialize dma engine */
+ INIT_LIST_HEAD(&dma->dma_device.channels);
+ for (i = 0; i < dma->nr_chs; i++) {
+ /*reserved one channel for intc interrupt*/
+ if (dma->intc_ch == i)
+ continue;
+ ingenic_dma_chan_init(dma, i);
+ }
+
+ dma_cap_set(DMA_MEMCPY, dma->dma_device.cap_mask);
+ dma_cap_set(DMA_SLAVE, dma->dma_device.cap_mask);
+ dma_cap_set(DMA_CYCLIC, dma->dma_device.cap_mask);
+
+ dma->dma_device.dev = &pdev->dev;
+ dma->dma_device.device_alloc_chan_resources = ingenic_dma_alloc_chan_resources;
+ dma->dma_device.device_free_chan_resources = ingenic_dma_free_chan_resources;
+ dma->dma_device.device_tx_status = ingenic_dma_tx_status;
+ dma->dma_device.device_prep_slave_sg = ingenic_dma_prep_slave_sg;
+ dma->dma_device.device_prep_dma_cyclic = ingenic_dma_prep_dma_cyclic;
+ dma->dma_device.device_prep_dma_memcpy = ingenic_dma_prep_dma_memcpy;
+ dma->dma_device.device_config = ingenic_dma_config;
+ dma->dma_device.device_terminate_all = ingenic_dma_terminate_all;
+ dma->dma_device.device_issue_pending = ingenic_dma_issue_pending;
+ dma->dma_device.device_synchronize = ingenic_dma_synchronize;
+ dma->dma_device.copy_align = DMAENGINE_ALIGN_4_BYTES;
+ dma->dma_device.src_addr_widths = BIT(DMA_SLAVE_BUSWIDTH_1_BYTE) |
+ BIT(DMA_SLAVE_BUSWIDTH_2_BYTES) |
+ BIT(DMA_SLAVE_BUSWIDTH_4_BYTES);
+ dma->dma_device.dst_addr_widths = dma->dma_device.src_addr_widths;
+ dma->dma_device.directions = BIT(DMA_DEV_TO_MEM) |
+ BIT(DMA_MEM_TO_DEV) |
+ BIT(DMA_MEM_TO_MEM);
+ dma->dma_device.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
+ dma->dma_device.dev->dma_parms = &dma->dma_parms;
+
+ dma_set_max_seg_size(dma->dma_device.dev, DTC_TC_MSK); /*At least*/
+
+ dma->gate_clk = devm_clk_get(&pdev->dev, "gate_pdma");
+ if (IS_ERR(dma->gate_clk))
+ return PTR_ERR(dma->gate_clk);
+
+ ret = dma_async_device_register(&dma->dma_device);
+ if (ret) {
+ dev_err(&pdev->dev, "unable to register\n");
+ clk_disable(dma->gate_clk);
+ return ret;
+ }
+
+ of_ingenic_dma_info.dma_cap = dma->dma_device.cap_mask;
+ ret = of_dma_controller_register(pdev->dev.of_node,
+ of_dma_simple_xlate, &of_ingenic_dma_info);
+ if (ret) {
+ dev_err(&pdev->dev, "unable to register dma to device tree\n");
+ dma_async_device_unregister(&dma->dma_device);
+ clk_disable(dma->gate_clk);
+ return ret;
+ }
+
+
+ platform_set_drvdata(pdev, dma);
+
+ /*enable pdma controller*/
+ clk_prepare_enable(dma->gate_clk);
+
+ if (dma->chan_programed)
+ writel(dma->chan_programed, dma->iomem + DMACP);
+ if (dma->intc_ch >= 0)
+ reg_dmac |= DMAC_INTCE | ((dma->intc_ch << DMAC_INTCC_SFT) & DMAC_INTCC_MSK);
+ if (dma->special_ch)
+ reg_dmac |= DMAC_CH01;
+ writel(reg_dmac, dma->iomem + DMAC);
+
+ dev_info(dma->dev, "INGENIC SoC DMA initialized\n");
+
+ return 0;
+}
+
+static int ingenic_dma_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct ingenic_dma_engine *ingenic_dma = platform_get_drvdata(pdev);
+ struct dma_chan *chan;
+
+ list_for_each_entry(chan, &ingenic_dma->dma_device.channels, device_node) {
+ struct ingenic_dma_chan *dmac = to_ingenic_dma_chan(chan);
+
+ if (dmac->sdesc)
+ return -EBUSY;
+ }
+ clk_disable_unprepare(ingenic_dma->gate_clk);
+
+ return 0;
+}
+
+static int ingenic_dma_resume(struct platform_device *pdev)
+{
+ struct ingenic_dma_engine *ingenic_dma = platform_get_drvdata(pdev);
+
+ clk_prepare_enable(ingenic_dma->gate_clk);
+
+ return 0;
+}
+
+static const struct of_device_id ingenic_dma_dt_match[] = {
+ { .compatible = "ingenic,m200-pdma", .data = (void *)(HWATTR_SPECIAL_CH01 |
+ HWATTR_INTC_IRQ)},
+ { .compatible = "ingenic,x1000-pdma", .data = (void *)HWATTR_DESC_INTER },
+ { .compatible = "ingenic,t40-pdma", .data = (void *)HWATTR_INTC_IRQ },
+ /*{ .compatible = "ingenic,t41-pdma", .data = (void *)HWATTR_INTC_IRQ },*/
+ { .compatible = "ingenic,t33-pdma", .data = (void *)NULL },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ingenic_dma_dt_match);
+
+static struct platform_driver ingenic_dma_driver = {
+ .driver = {
+ .name = "ingenic-dma",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(ingenic_dma_dt_match),
+ },
+ .suspend = ingenic_dma_suspend,
+ .resume = ingenic_dma_resume,
+};
+
+static int __init ingenic_dma_module_init(void)
+{
+ return platform_driver_probe(&ingenic_dma_driver, ingenic_dma_probe);
+}
+
+subsys_initcall(ingenic_dma_module_init);
+MODULE_AUTHOR("Chen.li <chen.li@xxxxxxxxxx>");
+MODULE_DESCRIPTION("Ingenic dma driver");
diff --git a/drivers/dma/ingenic/ingenic_dma.h b/drivers/dma/ingenic/ingenic_dma.h
new file mode 100644
index 000000000000..c78e3ab7b317
--- /dev/null
+++ b/drivers/dma/ingenic/ingenic_dma.h
@@ -0,0 +1,250 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2016 Ingenic Semiconductor Co., Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#ifndef __INGENIC_DMA_H__
+#define __INGENIC_DMA_H__
+#include <dt-bindings/dma/ingenic-pdma.h>
+#include "../virt-dma.h"
+#include "../dmaengine.h"
+#define CH_DSA 0x00
+#define CH_DTA 0x04
+#define CH_DTC 0x08
+#define CH_DRT 0x0C
+#define CH_DCS 0x10
+#define CH_DCM 0x14
+#define CH_DDA 0x18
+#define CH_DSD 0x1C
+
+#define TCSM 0x2000
+
+#define DMAC 0x1000
+#define DIRQP 0x1004
+#define DDR 0x1008
+#define DDRS 0x100C
+#define DIP 0x1010
+#define DIC 0x1014
+#define DMACP 0x101C
+#define DSIRQP 0x1020
+#define DSIRQM 0x1024
+#define DCIRQP 0x1028
+#define DCIRQM 0x102C
+
+#define DMACH_OFF 0x20
+/* DCS */
+#define DCS_NDES BIT(31)
+#define DCS_DES8 BIT(30)
+#define DCS_CDOA_SFT 8
+#define DCS_CDOA_MSK (0xff << DCS_CDOA_SFT)
+#define DCS_AR BIT(4)
+#define DCS_TT BIT(3)
+#define DCS_HLT BIT(2)
+#define DCS_CTE BIT(0)
+
+/* DTC */
+#define DTC_TC_SFT 0
+#define DTC_TC_MSK 0xffffff
+
+/* DCM */
+#define DCM_SAI BIT(23)
+#define DCM_DAI BIT(22)
+#define DCM_PORT_MSK (0xf << 12)
+#define DCM_PORT_8 (0x1 << 14 | 0x1 << 12)
+#define DCM_PORT_16 (0x2 << 14 | 0x2 << 12)
+#define DCM_PORT_32 (0x0 << 14 | 0x0 << 12)
+#define DCM_RDIL_SFT 16
+#define DCM_RDIL_MAX 0x9
+#define DCM_RDIL_MSK (0xf << DCM_RDIL_SFT)
+#define DCM_TSZ_SFT 8
+#define DCM_TSZ_AUTO 0x7
+#define DCM_TSZ_MSK (0x7 << DCM_TSZ_SFT)
+#define DCM_STDE BIT(2)
+#define DCM_TIE BIT(1)
+#define DCM_LINK BIT(0)
+
+/* DDA */
+#define DDA_DBA_SFT 12
+#define DDA_DBA_MSK (0xfffff << DDA_DBA_SFT)
+#define DDA_DOA_SFT 4
+#define DDA_DOA_MSK (0xff << DDA_DOA_SFT)
+#define PHY_TO_DESC_DOA(dma) ((((dma) & DDA_DOA_MSK) >> DDA_DOA_SFT) << 24)
+
+/* DSD */
+#define DSD_TSD_SFT 16
+#define DSD_TSD_MSK (0xffff << DSD_TSD_SFT)
+#define DSD_SSD_SFT 0
+#define DSD_SSD_MSK (0xffff << DSD_SSD_SFT)
+
+/* DMAC */
+#define DMAC_FMSC BIT(31)
+#define DMAC_FSSI BIT(30)
+#define DMAC_FTSSI BIT(29)
+#define DMAC_FUART BIT(28)
+#define DMAC_FAIC BIT(27)
+#define DMAC_INTCC_SFT 17
+#define DMAC_INTCC_MSK (0x1f << 17)
+#define DMAC_INTCE BIT(16)
+#define DMAC_HLT BIT(3)
+#define DMAC_AR BIT(2)
+#define DMAC_CH01 BIT(1)
+#define DMAC_DMAE BIT(0)
+
+/* MCU of PDMA */
+#define DMCS 0x1030
+#define DMNMB 0x1034
+#define DMSMB 0x1038
+#define DMINT 0x103C
+
+/* MCU of PDMA */
+#define DMINT_S_IP BIT(17)
+#define DMINT_N_IP BIT(16)
+
+#define DMA_SPECAIL_CHS 0x3 /*Channel 0 & 1*/
+
+/*8-word hardware dma descriptor*/
+struct hdma_desc {
+ unsigned long dcm;
+ dma_addr_t dsa;
+ dma_addr_t dta;
+ unsigned long dtc;
+ unsigned long sd;
+ unsigned long drt;
+ unsigned long reserved[2];
+};
+
+enum sdesc_status {
+ STAT_STOPPED = 0, STAT_RUNNING, STAT_ERROR
+};
+
+struct ingenic_dma_chan;
+struct ingenic_dma_sdesc {
+ struct virt_dma_desc vd; /* Virtual descriptor */
+ int nb_desc; /* Number of hw. descriptors */
+ size_t len; /* Number of bytes xfered */
+ bool cyclic;
+ struct hdma_desc **hw_desc; /* DMA coherent descriptors */
+ dma_addr_t *hw_desc_dma; /* DMA address of the Descriptors*/
+ struct ingenic_dma_chan *dmac; /* for free*/
+ int dcs; /* The DCS initial value */
+ int curr_desc;
+ enum sdesc_status status;
+};
+
+struct ingenic_dma_chan {
+ struct virt_dma_chan vc; /* Virtual channel */
+ int id; /* Channel id*/
+ void __iomem *iomem;
+ struct ingenic_dma_engine *engine;
+ bool fake_cyclic;
+
+ /*dma slave channel config*/
+ unsigned int slave_id; /* Request type of the channel */
+ enum dma_transfer_direction direction;
+ dma_addr_t slave_addr;
+ unsigned int maxburst;
+ unsigned int transfer_width;
+ unsigned int fast_mode; /* The fast mode bit of dmac*/
+ unsigned int dcm; /* The DCM of HW Descriptor initial value*/
+
+
+ /*Descriptors*/
+ struct dma_pool *hdesc_pool; /*HW Descriptors pool */
+ spinlock_t hdesc_lock; /*HW Descriptor assign lock*/
+ int hdesc_num; /*HW Descriptors assigned num*/
+ int hdesc_max; /*HW Descriptors maxnum capacity*/
+
+ struct ingenic_dma_sdesc *sdesc; /*Current Running Async Tx Desc*/
+
+ /*channel terminated completion*/
+ struct completion completion;
+};
+
+struct ingenic_dma_engine {
+ struct device *dev;
+ void __iomem *iomem;
+ struct clk *gate_clk;
+ struct dma_device dma_device;
+ struct device_dma_parameters dma_parms;
+
+ uint32_t chan_reserved;
+ uint32_t chan_programed;
+ int intc_ch;
+ bool special_ch;
+
+ /*hardware interrupt*/
+ int irq_pdma; /* pdma interrupt*/
+ int irq_pdmam; /* pdma mcu interrupt */
+ int irq_pdmad; /* pdma per-descriptor interrupt*/
+
+ /*hardware params*/
+#define HWATTR_INTC_IRQ (1 << 0)
+#define HWATTR_SPECIAL_CH01 (1 << 1)
+#define HWATTR_DESC_INTER (1 << 2)
+#define HWATTR_INTC_IRQ_SUP(x) (HWATTR_INTC_IRQ & (x))
+#define HWATTR_SPECIAL_CH01_SUP(x) (HWATTR_SPECIAL_CH01 & (x))
+#define HWATTR_DESC_INTER_SUP(x) (HWATTR_DESC_INTER & (x))
+ unsigned int hwattr;
+ /*channels*/
+ int nr_chs;
+ struct ingenic_dma_chan *chan[];
+};
+
+static inline struct device *chan2dev(struct dma_chan *chan)
+{
+ return &chan->dev->device;
+}
+
+static inline struct ingenic_dma_chan *to_ingenic_dma_chan(struct dma_chan *chan)
+{
+ return container_of(chan, struct ingenic_dma_chan, vc.chan);
+}
+
+static inline struct ingenic_dma_sdesc *to_ingenic_dma_sdesc(struct virt_dma_desc *vd)
+{
+ return container_of(vd, struct ingenic_dma_sdesc, vd);
+}
+
+#define INGENIC_DMA_REQ_AUTO 0xff
+#define INGENIC_DMA_CHAN_CNT 32
+unsigned long pdma_maps[INGENIC_DMA_CHAN_CNT] = {
+ INGENIC_DMA_REQ_AUTO,
+ INGENIC_DMA_REQ_AUTO,
+ INGENIC_DMA_REQ_AIC_LOOP_RX,
+ INGENIC_DMA_REQ_AIC_TX,
+ INGENIC_DMA_REQ_AIC_F_RX,
+ INGENIC_DMA_REQ_AUTO_TX,
+ INGENIC_DMA_REQ_SADC_RX,
+ INGENIC_DMA_REQ_UART5_TX,
+ INGENIC_DMA_REQ_UART5_RX,
+ INGENIC_DMA_REQ_UART4_TX,
+ INGENIC_DMA_REQ_UART4_RX,
+ INGENIC_DMA_REQ_UART3_TX,
+ INGENIC_DMA_REQ_UART3_RX,
+ INGENIC_DMA_REQ_UART2_TX,
+ INGENIC_DMA_REQ_UART2_RX,
+ INGENIC_DMA_REQ_UART1_TX,
+ INGENIC_DMA_REQ_UART1_RX,
+ INGENIC_DMA_REQ_UART0_TX,
+ INGENIC_DMA_REQ_UART0_RX,
+ INGENIC_DMA_REQ_SSI0_TX,
+ INGENIC_DMA_REQ_SSI0_RX,
+ INGENIC_DMA_REQ_SSI1_TX,
+ INGENIC_DMA_REQ_SSI1_RX,
+ INGENIC_DMA_REQ_SLV_TX,
+ INGENIC_DMA_REQ_SLV_RX,
+ INGENIC_DMA_REQ_I2C0_TX,
+ INGENIC_DMA_REQ_I2C0_RX,
+ INGENIC_DMA_REQ_I2C1_TX,
+ INGENIC_DMA_REQ_I2C1_RX,
+ INGENIC_DMA_REQ_DES_TX,
+ INGENIC_DMA_REQ_DES_RX,
+};
+
+void jzdma_dump(struct dma_chan *chan);
+#endif /*__INGENIC_DMA_H__*/
--
2.17.1