2 * Copyright (c) 2016, NVIDIA CORPORATION.
4 * SPDX-License-Identifier: GPL-2.0
11 #include <mailbox-uclass.h>
13 DECLARE_GLOBAL_DATA_PTR;
15 static inline struct mbox_ops *mbox_dev_ops(struct udevice *dev)
17 return (struct mbox_ops *)dev->driver->ops;
20 static int mbox_of_xlate_default(struct mbox_chan *chan,
21 struct fdtdec_phandle_args *args)
23 debug("%s(chan=%p)\n", __func__, chan);
25 if (args->args_count != 1) {
26 debug("Invaild args_count: %d\n", args->args_count);
30 chan->id = args->args[0];
35 int mbox_get_by_index(struct udevice *dev, int index, struct mbox_chan *chan)
37 struct fdtdec_phandle_args args;
39 struct udevice *dev_mbox;
42 debug("%s(dev=%p, index=%d, chan=%p)\n", __func__, dev, index, chan);
44 ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, dev->of_offset,
45 "mboxes", "#mbox-cells", 0,
48 debug("%s: fdtdec_parse_phandle_with_args failed: %d\n",
53 ret = uclass_get_device_by_of_offset(UCLASS_MAILBOX, args.node,
56 debug("%s: uclass_get_device_by_of_offset failed: %d\n",
60 ops = mbox_dev_ops(dev_mbox);
64 ret = ops->of_xlate(chan, &args);
66 ret = mbox_of_xlate_default(chan, &args);
68 debug("of_xlate() failed: %d\n", ret);
72 ret = ops->request(chan);
74 debug("ops->request() failed: %d\n", ret);
81 int mbox_get_by_name(struct udevice *dev, const char *name,
82 struct mbox_chan *chan)
86 debug("%s(dev=%p, name=%s, chan=%p)\n", __func__, dev, name, chan);
88 index = fdt_stringlist_search(gd->fdt_blob, dev->of_offset,
91 debug("fdt_stringlist_search() failed: %d\n", index);
95 return mbox_get_by_index(dev, index, chan);
98 int mbox_free(struct mbox_chan *chan)
100 struct mbox_ops *ops = mbox_dev_ops(chan->dev);
102 debug("%s(chan=%p)\n", __func__, chan);
104 return ops->free(chan);
107 int mbox_send(struct mbox_chan *chan, const void *data)
109 struct mbox_ops *ops = mbox_dev_ops(chan->dev);
111 debug("%s(chan=%p, data=%p)\n", __func__, chan, data);
113 return ops->send(chan, data);
116 int mbox_recv(struct mbox_chan *chan, void *data, ulong timeout_us)
118 struct mbox_ops *ops = mbox_dev_ops(chan->dev);
122 debug("%s(chan=%p, data=%p, timeout_us=%ld)\n", __func__, chan, data,
125 start_time = timer_get_us();
127 * Account for partial us ticks, but if timeout_us is 0, ensure we
128 * still don't wait at all.
134 ret = ops->recv(chan, data);
137 if ((timer_get_us() - start_time) >= timeout_us)
142 UCLASS_DRIVER(mailbox) = {
143 .id = UCLASS_MAILBOX,