+// SPDX-License-Identifier: GPL-2.0+
/*
* 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>
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
-#include <dma.h>
+#include <cpu_func.h>
#include <dm.h>
-#include <dm/uclass-internal.h>
-#include <dm/device-internal.h>
+#include <log.h>
+#include <malloc.h>
+#include <asm/cache.h>
+#include <dm/read.h>
+#include <dma-uclass.h>
+#include <dt-structs.h>
#include <errno.h>
-DECLARE_GLOBAL_DATA_PTR;
+#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->rfree)
+ return 0;
+
+ return ops->rfree(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);
+}
+
+int dma_get_cfg(struct dma *dma, u32 cfg_id, void **cfg_data)
+{
+ struct dma_ops *ops = dma_dev_ops(dma->dev);
+
+ debug("%s(dma=%p)\n", __func__, dma);
+
+ if (!ops->get_cfg)
+ return -ENOSYS;
+
+ return ops->get_cfg(dma, cfg_id, cfg_data);
+}
+#endif /* CONFIG_DMA_CHANNELS */
int dma_get_device(u32 transfer_type, struct udevice **devp)
{
}
if (!dev) {
- error("No DMA device found that supports %x type\n",
- transfer_type);
+ pr_debug("No DMA device found that supports %x type\n",
+ transfer_type);
return -EPROTONOSUPPORT;
}
.id = UCLASS_DMA,
.name = "dma",
.flags = DM_UC_FLAG_SEQ_ALIAS,
- .per_device_auto_alloc_size = sizeof(struct dma_dev_priv),
+ .per_device_auto = sizeof(struct dma_dev_priv),
};
projects / platform / kernel / u-boot.git / blobdiff