summaryrefslogtreecommitdiff
path: root/drivers/dma
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/Kconfig14
-rw-r--r--drivers/dma/Makefile1
-rw-r--r--drivers/dma/dma-uclass.c183
-rw-r--r--drivers/dma/sandbox-dma-test.c282
-rw-r--r--drivers/dma/ti-edma3.c2
5 files changed, 476 insertions, 6 deletions
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 4ee6afad35..8a4162eccd 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -12,6 +12,20 @@ config DMA
buses that is used to transfer data to and from memory.
The uclass interface is defined in include/dma.h.
+config DMA_CHANNELS
+ bool "Enable DMA channels support"
+ depends on DMA
+ help
+ Enable channels support for DMA. Some DMA controllers have multiple
+ channels which can either transfer data to/from different devices.
+
+config SANDBOX_DMA
+ bool "Enable the sandbox DMA test driver"
+ depends on DMA && DMA_CHANNELS && SANDBOX
+ help
+ Enable support for a test DMA uclass implementation. It stimulates
+ DMA transfer by simple copying data between channels.
+
config TI_EDMA3
bool "TI EDMA3 driver"
help
diff --git a/drivers/dma/Makefile b/drivers/dma/Makefile
index 4eaef8ac65..aff31f986a 100644
--- a/drivers/dma/Makefile
+++ b/drivers/dma/Makefile
@@ -8,6 +8,7 @@ obj-$(CONFIG_DMA) += dma-uclass.o
obj-$(CONFIG_FSLDMAFEC) += MCD_tasksInit.o MCD_dmaApi.o MCD_tasks.o
obj-$(CONFIG_APBH_DMA) += apbh_dma.o
obj-$(CONFIG_FSL_DMA) += fsl_dma.o
+obj-$(CONFIG_SANDBOX_DMA) += sandbox-dma-test.o
obj-$(CONFIG_TI_KSNAV) += keystone_nav.o keystone_nav_cfg.o
obj-$(CONFIG_TI_EDMA3) += ti-edma3.o
obj-$(CONFIG_DMA_LPC32XX) += lpc32xx_dma.o
diff --git a/drivers/dma/dma-uclass.c b/drivers/dma/dma-uclass.c
index a33f7d52da..9c961cf1e2 100644
--- a/drivers/dma/dma-uclass.c
+++ b/drivers/dma/dma-uclass.c
@@ -2,19 +2,192 @@
/*
* Direct Memory Access U-Class driver
*
- * (C) Copyright 2015
- * Texas Instruments Incorporated, <www.ti.com>
+ * Copyright (C) 2018 Álvaro Fernández Rojas <noltari@gmail.com>
+ * Copyright (C) 2015 - 2018 Texas Instruments Incorporated <www.ti.com>
+ * Written by Mugunthan V N <mugunthanvnm@ti.com>
*
* Author: Mugunthan V N <mugunthanvnm@ti.com>
*/
#include <common.h>
-#include <dma.h>
#include <dm.h>
-#include <dm/uclass-internal.h>
-#include <dm/device-internal.h>
+#include <dm/read.h>
+#include <dma-uclass.h>
+#include <dt-structs.h>
#include <errno.h>
+#ifdef CONFIG_DMA_CHANNELS
+static inline struct dma_ops *dma_dev_ops(struct udevice *dev)
+{
+ return (struct dma_ops *)dev->driver->ops;
+}
+
+# if CONFIG_IS_ENABLED(OF_CONTROL)
+static int dma_of_xlate_default(struct dma *dma,
+ struct ofnode_phandle_args *args)
+{
+ debug("%s(dma=%p)\n", __func__, dma);
+
+ if (args->args_count > 1) {
+ pr_err("Invaild args_count: %d\n", args->args_count);
+ return -EINVAL;
+ }
+
+ if (args->args_count)
+ dma->id = args->args[0];
+ else
+ dma->id = 0;
+
+ return 0;
+}
+
+int dma_get_by_index(struct udevice *dev, int index, struct dma *dma)
+{
+ int ret;
+ struct ofnode_phandle_args args;
+ struct udevice *dev_dma;
+ const struct dma_ops *ops;
+
+ debug("%s(dev=%p, index=%d, dma=%p)\n", __func__, dev, index, dma);
+
+ assert(dma);
+ dma->dev = NULL;
+
+ ret = dev_read_phandle_with_args(dev, "dmas", "#dma-cells", 0, index,
+ &args);
+ if (ret) {
+ pr_err("%s: dev_read_phandle_with_args failed: err=%d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = uclass_get_device_by_ofnode(UCLASS_DMA, args.node, &dev_dma);
+ if (ret) {
+ pr_err("%s: uclass_get_device_by_ofnode failed: err=%d\n",
+ __func__, ret);
+ return ret;
+ }
+
+ dma->dev = dev_dma;
+
+ ops = dma_dev_ops(dev_dma);
+
+ if (ops->of_xlate)
+ ret = ops->of_xlate(dma, &args);
+ else
+ ret = dma_of_xlate_default(dma, &args);
+ if (ret) {
+ pr_err("of_xlate() failed: %d\n", ret);
+ return ret;
+ }
+
+ return dma_request(dev_dma, dma);
+}
+
+int dma_get_by_name(struct udevice *dev, const char *name, struct dma *dma)
+{
+ int index;
+
+ debug("%s(dev=%p, name=%s, dma=%p)\n", __func__, dev, name, dma);
+ dma->dev = NULL;
+
+ index = dev_read_stringlist_search(dev, "dma-names", name);
+ if (index < 0) {
+ pr_err("dev_read_stringlist_search() failed: %d\n", index);
+ return index;
+ }
+
+ return dma_get_by_index(dev, index, dma);
+}
+# endif /* OF_CONTROL */
+
+int dma_request(struct udevice *dev, struct dma *dma)
+{
+ struct dma_ops *ops = dma_dev_ops(dev);
+
+ debug("%s(dev=%p, dma=%p)\n", __func__, dev, dma);
+
+ dma->dev = dev;
+
+ if (!ops->request)
+ return 0;
+
+ return ops->request(dma);
+}
+
+int dma_free(struct dma *dma)
+{
+ struct dma_ops *ops = dma_dev_ops(dma->dev);
+
+ debug("%s(dma=%p)\n", __func__, dma);
+
+ if (!ops->free)
+ return 0;
+
+ return ops->free(dma);
+}
+
+int dma_enable(struct dma *dma)
+{
+ struct dma_ops *ops = dma_dev_ops(dma->dev);
+
+ debug("%s(dma=%p)\n", __func__, dma);
+
+ if (!ops->enable)
+ return -ENOSYS;
+
+ return ops->enable(dma);
+}
+
+int dma_disable(struct dma *dma)
+{
+ struct dma_ops *ops = dma_dev_ops(dma->dev);
+
+ debug("%s(dma=%p)\n", __func__, dma);
+
+ if (!ops->disable)
+ return -ENOSYS;
+
+ return ops->disable(dma);
+}
+
+int dma_prepare_rcv_buf(struct dma *dma, void *dst, size_t size)
+{
+ struct dma_ops *ops = dma_dev_ops(dma->dev);
+
+ debug("%s(dma=%p)\n", __func__, dma);
+
+ if (!ops->prepare_rcv_buf)
+ return -1;
+
+ return ops->prepare_rcv_buf(dma, dst, size);
+}
+
+int dma_receive(struct dma *dma, void **dst, void *metadata)
+{
+ struct dma_ops *ops = dma_dev_ops(dma->dev);
+
+ debug("%s(dma=%p)\n", __func__, dma);
+
+ if (!ops->receive)
+ return -ENOSYS;
+
+ return ops->receive(dma, dst, metadata);
+}
+
+int dma_send(struct dma *dma, void *src, size_t len, void *metadata)
+{
+ struct dma_ops *ops = dma_dev_ops(dma->dev);
+
+ debug("%s(dma=%p)\n", __func__, dma);
+
+ if (!ops->send)
+ return -ENOSYS;
+
+ return ops->send(dma, src, len, metadata);
+}
+#endif /* CONFIG_DMA_CHANNELS */
+
int dma_get_device(u32 transfer_type, struct udevice **devp)
{
struct udevice *dev;
diff --git a/drivers/dma/sandbox-dma-test.c b/drivers/dma/sandbox-dma-test.c
new file mode 100644
index 0000000000..8fcef1863e
--- /dev/null
+++ b/drivers/dma/sandbox-dma-test.c
@@ -0,0 +1,282 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Direct Memory Access U-Class Simulation driver
+ *
+ * Copyright (C) 2018 Texas Instruments Incorporated <www.ti.com>
+ *
+ * Author: Grygorii Strashko <grygorii.strashko@ti.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/read.h>
+#include <dma-uclass.h>
+#include <dt-structs.h>
+#include <errno.h>
+
+#define SANDBOX_DMA_CH_CNT 3
+#define SANDBOX_DMA_BUF_SIZE 1024
+
+struct sandbox_dma_chan {
+ struct sandbox_dma_dev *ud;
+ char name[20];
+ u32 id;
+ enum dma_direction dir;
+ bool in_use;
+ bool enabled;
+};
+
+struct sandbox_dma_dev {
+ struct device *dev;
+ u32 ch_count;
+ struct sandbox_dma_chan channels[SANDBOX_DMA_CH_CNT];
+ uchar buf[SANDBOX_DMA_BUF_SIZE];
+ uchar *buf_rx;
+ size_t data_len;
+ u32 meta;
+};
+
+static int sandbox_dma_transfer(struct udevice *dev, int direction,
+ void *dst, void *src, size_t len)
+{
+ memcpy(dst, src, len);
+
+ return 0;
+}
+
+static int sandbox_dma_of_xlate(struct dma *dma,
+ struct ofnode_phandle_args *args)
+{
+ struct sandbox_dma_dev *ud = dev_get_priv(dma->dev);
+ struct sandbox_dma_chan *uc;
+
+ debug("%s(dma id=%u)\n", __func__, args->args[0]);
+
+ if (args->args[0] >= SANDBOX_DMA_CH_CNT)
+ return -EINVAL;
+
+ dma->id = args->args[0];
+
+ uc = &ud->channels[dma->id];
+
+ if (dma->id == 1)
+ uc->dir = DMA_MEM_TO_DEV;
+ else if (dma->id == 2)
+ uc->dir = DMA_DEV_TO_MEM;
+ else
+ uc->dir = DMA_MEM_TO_MEM;
+ debug("%s(dma id=%lu dir=%d)\n", __func__, dma->id, uc->dir);
+
+ return 0;
+}
+
+static int sandbox_dma_request(struct dma *dma)
+{
+ struct sandbox_dma_dev *ud = dev_get_priv(dma->dev);
+ struct sandbox_dma_chan *uc;
+
+ if (dma->id >= SANDBOX_DMA_CH_CNT)
+ return -EINVAL;
+
+ uc = &ud->channels[dma->id];
+ if (uc->in_use)
+ return -EBUSY;
+
+ uc->in_use = true;
+ debug("%s(dma id=%lu in_use=%d)\n", __func__, dma->id, uc->in_use);
+
+ return 0;
+}
+
+static int sandbox_dma_free(struct dma *dma)
+{
+ struct sandbox_dma_dev *ud = dev_get_priv(dma->dev);
+ struct sandbox_dma_chan *uc;
+
+ if (dma->id >= SANDBOX_DMA_CH_CNT)
+ return -EINVAL;
+
+ uc = &ud->channels[dma->id];
+ if (!uc->in_use)
+ return -EINVAL;
+
+ uc->in_use = false;
+ ud->buf_rx = NULL;
+ ud->data_len = 0;
+ debug("%s(dma id=%lu in_use=%d)\n", __func__, dma->id, uc->in_use);
+
+ return 0;
+}
+
+static int sandbox_dma_enable(struct dma *dma)
+{
+ struct sandbox_dma_dev *ud = dev_get_priv(dma->dev);
+ struct sandbox_dma_chan *uc;
+
+ if (dma->id >= SANDBOX_DMA_CH_CNT)
+ return -EINVAL;
+
+ uc = &ud->channels[dma->id];
+ if (!uc->in_use)
+ return -EINVAL;
+ if (uc->enabled)
+ return -EINVAL;
+
+ uc->enabled = true;
+ debug("%s(dma id=%lu enabled=%d)\n", __func__, dma->id, uc->enabled);
+
+ return 0;
+}
+
+static int sandbox_dma_disable(struct dma *dma)
+{
+ struct sandbox_dma_dev *ud = dev_get_priv(dma->dev);
+ struct sandbox_dma_chan *uc;
+
+ if (dma->id >= SANDBOX_DMA_CH_CNT)
+ return -EINVAL;
+
+ uc = &ud->channels[dma->id];
+ if (!uc->in_use)
+ return -EINVAL;
+ if (!uc->enabled)
+ return -EINVAL;
+
+ uc->enabled = false;
+ debug("%s(dma id=%lu enabled=%d)\n", __func__, dma->id, uc->enabled);
+
+ return 0;
+}
+
+static int sandbox_dma_send(struct dma *dma,
+ void *src, size_t len, void *metadata)
+{
+ struct sandbox_dma_dev *ud = dev_get_priv(dma->dev);
+ struct sandbox_dma_chan *uc;
+
+ if (dma->id >= SANDBOX_DMA_CH_CNT)
+ return -EINVAL;
+ if (!src || !metadata)
+ return -EINVAL;
+
+ debug("%s(dma id=%lu)\n", __func__, dma->id);
+
+ uc = &ud->channels[dma->id];
+ if (uc->dir != DMA_MEM_TO_DEV)
+ return -EINVAL;
+ if (!uc->in_use)
+ return -EINVAL;
+ if (!uc->enabled)
+ return -EINVAL;
+ if (len >= SANDBOX_DMA_BUF_SIZE)
+ return -EINVAL;
+
+ memcpy(ud->buf, src, len);
+ ud->data_len = len;
+ ud->meta = *((u32 *)metadata);
+
+ debug("%s(dma id=%lu len=%zu meta=%08x)\n",
+ __func__, dma->id, len, ud->meta);
+
+ return 0;
+}
+
+static int sandbox_dma_receive(struct dma *dma, void **dst, void *metadata)
+{
+ struct sandbox_dma_dev *ud = dev_get_priv(dma->dev);
+ struct sandbox_dma_chan *uc;
+
+ if (dma->id >= SANDBOX_DMA_CH_CNT)
+ return -EINVAL;
+ if (!dst || !metadata)
+ return -EINVAL;
+
+ uc = &ud->channels[dma->id];
+ if (uc->dir != DMA_DEV_TO_MEM)
+ return -EINVAL;
+ if (!uc->in_use)
+ return -EINVAL;
+ if (!uc->enabled)
+ return -EINVAL;
+ if (!ud->data_len)
+ return 0;
+
+ if (ud->buf_rx) {
+ memcpy(ud->buf_rx, ud->buf, ud->data_len);
+ *dst = ud->buf_rx;
+ } else {
+ memcpy(*dst, ud->buf, ud->data_len);
+ }
+
+ *((u32 *)metadata) = ud->meta;
+
+ debug("%s(dma id=%lu len=%zu meta=%08x %p)\n",
+ __func__, dma->id, ud->data_len, ud->meta, *dst);
+
+ return ud->data_len;
+}
+
+static int sandbox_dma_prepare_rcv_buf(struct dma *dma, void *dst, size_t size)
+{
+ struct sandbox_dma_dev *ud = dev_get_priv(dma->dev);
+
+ ud->buf_rx = dst;
+
+ return 0;
+}
+
+static const struct dma_ops sandbox_dma_ops = {
+ .transfer = sandbox_dma_transfer,
+ .of_xlate = sandbox_dma_of_xlate,
+ .request = sandbox_dma_request,
+ .free = sandbox_dma_free,
+ .enable = sandbox_dma_enable,
+ .disable = sandbox_dma_disable,
+ .send = sandbox_dma_send,
+ .receive = sandbox_dma_receive,
+ .prepare_rcv_buf = sandbox_dma_prepare_rcv_buf,
+};
+
+static int sandbox_dma_probe(struct udevice *dev)
+{
+ struct dma_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+ struct sandbox_dma_dev *ud = dev_get_priv(dev);
+ int i, ret = 0;
+
+ uc_priv->supported = DMA_SUPPORTS_MEM_TO_MEM |
+ DMA_SUPPORTS_MEM_TO_DEV |
+ DMA_SUPPORTS_DEV_TO_MEM;
+
+ ud->ch_count = SANDBOX_DMA_CH_CNT;
+ ud->buf_rx = NULL;
+ ud->meta = 0;
+ ud->data_len = 0;
+
+ pr_err("Number of channels: %u\n", ud->ch_count);
+
+ for (i = 0; i < ud->ch_count; i++) {
+ struct sandbox_dma_chan *uc = &ud->channels[i];
+
+ uc->ud = ud;
+ uc->id = i;
+ sprintf(uc->name, "DMA chan%d\n", i);
+ uc->in_use = false;
+ uc->enabled = false;
+ }
+
+ return ret;
+}
+
+static const struct udevice_id sandbox_dma_ids[] = {
+ { .compatible = "sandbox,dma" },
+ { }
+};
+
+U_BOOT_DRIVER(sandbox_dma) = {
+ .name = "sandbox-dma",
+ .id = UCLASS_DMA,
+ .of_match = sandbox_dma_ids,
+ .ops = &sandbox_dma_ops,
+ .probe = sandbox_dma_probe,
+ .priv_auto_alloc_size = sizeof(struct sandbox_dma_dev),
+};
diff --git a/drivers/dma/ti-edma3.c b/drivers/dma/ti-edma3.c
index 2131e10a40..7e11b13e45 100644
--- a/drivers/dma/ti-edma3.c
+++ b/drivers/dma/ti-edma3.c
@@ -11,7 +11,7 @@
#include <asm/io.h>
#include <common.h>
#include <dm.h>
-#include <dma.h>
+#include <dma-uclass.h>
#include <asm/omap_common.h>
#include <asm/ti-common/ti-edma3.h>
generated by cgit (git 2.34.1) at 2025-01-10 03:59:57 +0000