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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>
126 lines
3.0 KiB
C
126 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2018
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* Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
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*/
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#include <common.h>
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#include <axi.h>
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#include <dm.h>
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#include <log.h>
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#include <malloc.h>
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/**
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* struct sandbox_store_priv - Private data structure of a AXI store device
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* @store: The buffer holding the device's internal memory, which is read from
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* and written to using the driver's methods
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*/
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struct sandbox_store_priv {
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u8 *store;
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};
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/**
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* copy_axi_data() - Copy data from source to destination with a given AXI
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* transfer width
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* @src: Pointer to the data source from where data will be read
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* @dst: Pointer to the data destination where data will be written to
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* @size: Size of the data to be copied given by a axi_size_t enum value
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*
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* Return: 0 if OK, -ve on error
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*/
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static int copy_axi_data(void *src, void *dst, enum axi_size_t size)
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{
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switch (size) {
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case AXI_SIZE_8:
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*((u8 *)dst) = *((u8 *)src);
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return 0;
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case AXI_SIZE_16:
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*((u16 *)dst) = be16_to_cpu(*((u16 *)src));
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return 0;
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case AXI_SIZE_32:
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*((u32 *)dst) = be32_to_cpu(*((u32 *)src));
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return 0;
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default:
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debug("%s: Unknown AXI transfer size '%d'\n", __func__, size);
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return -EINVAL;
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}
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}
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static int sandbox_store_read(struct udevice *dev, ulong address, void *data,
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enum axi_size_t size)
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{
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struct sandbox_store_priv *priv = dev_get_priv(dev);
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return copy_axi_data(priv->store + address, data, size);
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}
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static int sandbox_store_write(struct udevice *dev, ulong address, void *data,
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enum axi_size_t size)
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{
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struct sandbox_store_priv *priv = dev_get_priv(dev);
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return copy_axi_data(data, priv->store + address, size);
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}
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static int sandbox_store_get_store(struct udevice *dev, u8 **store)
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{
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struct sandbox_store_priv *priv = dev_get_priv(dev);
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*store = priv->store;
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return 0;
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}
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static const struct udevice_id sandbox_store_ids[] = {
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{ .compatible = "sandbox,sandbox_store" },
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{ /* sentinel */ }
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};
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static const struct axi_emul_ops sandbox_store_ops = {
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.read = sandbox_store_read,
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.write = sandbox_store_write,
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.get_store = sandbox_store_get_store,
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};
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static int sandbox_store_probe(struct udevice *dev)
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{
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struct sandbox_store_priv *priv = dev_get_priv(dev);
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u32 reg[2];
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int ret;
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ret = dev_read_u32_array(dev, "reg", reg, ARRAY_SIZE(reg));
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if (ret) {
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debug("%s: Could not read 'reg' property\n", dev->name);
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return -EINVAL;
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}
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/*
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* Allocate the device's internal storage that will be read
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* from/written to
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*/
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priv->store = calloc(reg[1], 1);
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if (!priv->store)
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return -ENOMEM;
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return 0;
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}
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static int sandbox_store_remove(struct udevice *dev)
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{
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struct sandbox_store_priv *priv = dev_get_priv(dev);
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free(priv->store);
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return 0;
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}
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U_BOOT_DRIVER(sandbox_axi_store) = {
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.name = "sandbox_axi_store",
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.id = UCLASS_AXI_EMUL,
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.of_match = sandbox_store_ids,
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.ops = &sandbox_store_ops,
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.priv_auto = sizeof(struct sandbox_store_priv),
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.probe = sandbox_store_probe,
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.remove = sandbox_store_remove,
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};
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