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https://github.com/brain-hackers/u-boot-brain
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41575d8e4c
This construct is quite long-winded. In earlier days it made some sense since auto-allocation was a strange concept. But with driver model now used pretty universally, we can shorten this to 'auto'. This reduces verbosity and makes it easier to read. Coincidentally it also ensures that every declaration is on one line, thus making dtoc's job easier. Signed-off-by: Simon Glass <sjg@chromium.org>
106 lines
2.1 KiB
C
106 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2016, NVIDIA CORPORATION.
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*/
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#include <common.h>
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#include <dm.h>
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#include <log.h>
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#include <mailbox-uclass.h>
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#include <malloc.h>
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#include <asm/io.h>
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#include <asm/mbox.h>
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#define SANDBOX_MBOX_CHANNELS 2
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struct sandbox_mbox_chan {
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bool rx_msg_valid;
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uint32_t rx_msg;
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};
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struct sandbox_mbox {
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struct sandbox_mbox_chan chans[SANDBOX_MBOX_CHANNELS];
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};
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static int sandbox_mbox_request(struct mbox_chan *chan)
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{
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debug("%s(chan=%p)\n", __func__, chan);
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if (chan->id >= SANDBOX_MBOX_CHANNELS)
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return -EINVAL;
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return 0;
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}
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static int sandbox_mbox_free(struct mbox_chan *chan)
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{
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debug("%s(chan=%p)\n", __func__, chan);
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return 0;
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}
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static int sandbox_mbox_send(struct mbox_chan *chan, const void *data)
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{
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struct sandbox_mbox *sbm = dev_get_priv(chan->dev);
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const uint32_t *pmsg = data;
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debug("%s(chan=%p, data=%p)\n", __func__, chan, data);
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sbm->chans[chan->id].rx_msg = *pmsg ^ SANDBOX_MBOX_PING_XOR;
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sbm->chans[chan->id].rx_msg_valid = true;
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return 0;
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}
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static int sandbox_mbox_recv(struct mbox_chan *chan, void *data)
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{
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struct sandbox_mbox *sbm = dev_get_priv(chan->dev);
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uint32_t *pmsg = data;
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debug("%s(chan=%p, data=%p)\n", __func__, chan, data);
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if (!sbm->chans[chan->id].rx_msg_valid)
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return -ENODATA;
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*pmsg = sbm->chans[chan->id].rx_msg;
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sbm->chans[chan->id].rx_msg_valid = false;
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return 0;
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}
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static int sandbox_mbox_bind(struct udevice *dev)
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{
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debug("%s(dev=%p)\n", __func__, dev);
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return 0;
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}
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static int sandbox_mbox_probe(struct udevice *dev)
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{
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debug("%s(dev=%p)\n", __func__, dev);
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return 0;
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}
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static const struct udevice_id sandbox_mbox_ids[] = {
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{ .compatible = "sandbox,mbox" },
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{ }
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};
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struct mbox_ops sandbox_mbox_mbox_ops = {
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.request = sandbox_mbox_request,
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.rfree = sandbox_mbox_free,
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.send = sandbox_mbox_send,
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.recv = sandbox_mbox_recv,
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};
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U_BOOT_DRIVER(sandbox_mbox) = {
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.name = "sandbox_mbox",
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.id = UCLASS_MAILBOX,
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.of_match = sandbox_mbox_ids,
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.bind = sandbox_mbox_bind,
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.probe = sandbox_mbox_probe,
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.priv_auto = sizeof(struct sandbox_mbox),
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.ops = &sandbox_mbox_mbox_ops,
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};
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