127 lines
2.5 KiB
C
127 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (c) 2021 MediaTek Inc.
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/cdev.h>
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#include <linux/of_device.h>
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#include <linux/types.h>
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#include <linux/dma-direct.h>
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#include "mdw_mem_rsc.h"
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#include "apusys_core.h"
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#include "mdw_cmn.h"
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#include "mdw_mem.h"
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struct apusys_core_info *g_apusys_core;
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static int apumem_probe(struct platform_device *pdev)
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{
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int ret = 0;
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uint32_t type = 0;
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uint64_t mask = 0;
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struct device *dev = &pdev->dev;
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pr_info("%s start, dev:%s\n", __func__, dev_name(&pdev->dev));
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of_property_read_u64(pdev->dev.of_node, "mask", &mask);
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of_property_read_u32(pdev->dev.of_node, "type", &type);
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pr_info("%s mask 0x%llx type %u\n", __func__, mask, type);
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ret = dma_set_mask_and_coherent(dev, mask);
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if (ret) {
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dev_info(&pdev->dev, "unable to set DMA mask coherent: %d\n", ret);
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return ret;
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}
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pr_info("%s dma_set_mask_and_coherent 0x%llx type %u\n", __func__, mask, type);
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ret = dma_set_mask(dev, mask);
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if (ret) {
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dev_info(&pdev->dev, "unable to set DMA mask: %d\n", ret);
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return ret;
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}
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pr_info("%s dma_set_mask 0x%llx type %u\n", __func__, mask, type);
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if (!pdev->dev.dma_parms) {
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pdev->dev.dma_parms =
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devm_kzalloc(dev, sizeof(*pdev->dev.dma_parms), GFP_KERNEL);
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}
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if (pdev->dev.dma_parms) {
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ret = dma_set_max_seg_size(dev, mask);
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if (ret)
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dev_info(dev, "Failed to set DMA segment size\n");
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}
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mdw_mem_rsc_register(&pdev->dev, type);
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pr_info("%s +\n", __func__);
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return ret;
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}
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static int apumem_remove(struct platform_device *pdev)
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{
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int type = 0;
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of_property_read_u32(pdev->dev.of_node, "type", &type);
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mdw_mem_rsc_unregister(type);
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pr_info("%s +\n", __func__);
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return 0;
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}
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static const struct of_device_id mem_of_match[] = {
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{.compatible = "mediatek, apu_mem_code"},
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{.compatible = "mediatek, apu_mem_data"},
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{},
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};
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static struct platform_driver apumem_driver = {
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.driver = {
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.name = "apumem_driver",
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.owner = THIS_MODULE,
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.of_match_table = mem_of_match,
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},
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.probe = apumem_probe,
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.remove = apumem_remove,
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};
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int apumem_init(struct apusys_core_info *info)
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{
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int ret = 0;
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g_apusys_core = info;
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mdw_mem_rsc_init();
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ret = platform_driver_register(&apumem_driver);
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if (ret) {
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pr_info("failed to register apu mdw driver\n");
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goto out;
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}
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pr_info("%s:%d\n", __func__, __LINE__);
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goto out;
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out:
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return ret;
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}
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void apumem_exit(void)
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{
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pr_info("%s:%d\n", __func__, __LINE__);
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platform_driver_unregister(&apumem_driver);
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mdw_mem_rsc_deinit();
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g_apusys_core = NULL;
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}
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