126 lines
2.7 KiB
C
126 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* AMD ACP PCI driver callback routines for ACP7.x
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* platforms.
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*
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* Copyright 2026 Advanced Micro Devices, Inc.
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*/
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#include <linux/device.h>
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#include <linux/io.h>
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#include <linux/iopoll.h>
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#include <linux/types.h>
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#include "acp7x.h"
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static int acp7x_power_on(void __iomem *acp_base)
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{
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u32 val = 0;
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val = readl(acp_base + ACP_PGFSM_STATUS);
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if (!(val & ACP7X_PGFSM_STATUS_MASK))
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return 0;
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writel(ACP7X_PGFSM_CNTL_POWER_ON_MASK, acp_base + ACP_PGFSM_CONTROL);
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val = readl(acp_base + ACP_PGFSM_CONTROL);
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return readl_poll_timeout(acp_base + ACP_PGFSM_STATUS, val,
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((val & ACP7X_PGFSM_STATUS_MASK) == 0), DELAY_US, ACP7X_TIMEOUT);
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}
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static int acp7x_reset(void __iomem *acp_base)
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{
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u32 val;
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int ret;
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writel(1, acp_base + ACP_SOFT_RESET);
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ret = readl_poll_timeout(acp_base + ACP_SOFT_RESET, val,
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val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK,
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DELAY_US, ACP7X_TIMEOUT);
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if (ret)
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return ret;
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writel(0, acp_base + ACP_SOFT_RESET);
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return readl_poll_timeout(acp_base + ACP_SOFT_RESET, val, !val, DELAY_US, ACP7X_TIMEOUT);
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}
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static int acp7x_init(void __iomem *acp_base, struct device *dev)
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{
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int ret;
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ret = acp7x_power_on(acp_base);
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if (ret) {
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dev_err(dev, "ACP power on failed\n");
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return ret;
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}
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writel(0x01, acp_base + ACP_CONTROL);
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ret = acp7x_reset(acp_base);
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if (ret) {
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dev_err(dev, "ACP reset failed\n");
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return ret;
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}
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writel(0, acp_base + ACP_ZSC_DSP_CTRL);
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return 0;
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}
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static int acp7x_deinit(void __iomem *acp_base, struct device *dev)
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{
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int ret;
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ret = acp7x_reset(acp_base);
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if (ret) {
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dev_err(dev, "ACP reset failed\n");
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return ret;
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}
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writel(0x01, acp_base + ACP_ZSC_DSP_CTRL);
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return 0;
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}
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static int __maybe_unused snd_acp7x_suspend(struct device *dev)
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{
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struct acp7x_dev_data *adata;
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int ret;
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adata = dev_get_drvdata(dev);
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ret = acp_hw_deinit(adata, dev);
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if (ret)
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dev_err(dev, "ACP de-init failed\n");
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return ret;
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}
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static int __maybe_unused snd_acp7x_runtime_resume(struct device *dev)
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{
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struct acp7x_dev_data *adata;
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int ret;
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adata = dev_get_drvdata(dev);
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ret = acp_hw_init(adata, dev);
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if (ret) {
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dev_err(dev, "ACP init failed\n");
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return ret;
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}
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return 0;
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}
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static int __maybe_unused snd_acp7x_resume(struct device *dev)
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{
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struct acp7x_dev_data *adata;
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int ret;
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adata = dev_get_drvdata(dev);
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ret = acp_hw_init(adata, dev);
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if (ret)
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dev_err(dev, "ACP init failed\n");
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return ret;
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}
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void acp7x_hw_init_ops(struct acp_hw_ops *hw_ops)
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{
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hw_ops->acp_init = acp7x_init;
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hw_ops->acp_deinit = acp7x_deinit;
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hw_ops->acp_suspend = snd_acp7x_suspend;
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hw_ops->acp_resume = snd_acp7x_resume;
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hw_ops->acp_suspend_runtime = snd_acp7x_suspend;
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hw_ops->acp_resume_runtime = snd_acp7x_runtime_resume;
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}
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