1 files changed, 99 insertions, 0 deletions
diff --git a/sound/soc/amd/acp/acp-legacy-common.c b/sound/soc/amd/acp/acp-legacy-common.c
new file mode 100644
index 000000000000..5b7000eae693
--- /dev/null
+++ b/sound/soc/amd/acp/acp-legacy-common.c
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
+//
+// This file is provided under a dual BSD/GPLv2 license. When using or
+// redistributing this file, you may do so under either license.
+//
+// Copyright(c) 2023 Advanced Micro Devices, Inc.
+//
+// Authors: Syed Saba Kareem <Syed.SabaKareem@amd.com>
+//
+
+/*
+ * Common file to be used by amd platforms
+ */
+
+#include "amd.h"
+#include <linux/export.h>
+
+static int acp_power_on(struct acp_chip_info *chip)
+{
+	u32 val, acp_pgfsm_stat_reg, acp_pgfsm_ctrl_reg;
+	void __iomem *base;
+
+	base = chip->base;
+	switch (chip->acp_rev) {
+	case ACP3X_DEV:
+		acp_pgfsm_stat_reg = ACP_PGFSM_STATUS;
+		acp_pgfsm_ctrl_reg = ACP_PGFSM_CONTROL;
+		break;
+	case ACP6X_DEV:
+		acp_pgfsm_stat_reg = ACP6X_PGFSM_STATUS;
+		acp_pgfsm_ctrl_reg = ACP6X_PGFSM_CONTROL;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	val = readl(base + acp_pgfsm_stat_reg);
+	if (val == ACP_POWERED_ON)
+		return 0;
+
+	if ((val & ACP_PGFSM_STATUS_MASK) != ACP_POWER_ON_IN_PROGRESS)
+		writel(ACP_PGFSM_CNTL_POWER_ON_MASK, base + acp_pgfsm_ctrl_reg);
+
+	return readl_poll_timeout(base + acp_pgfsm_stat_reg, val,
+				  !val, DELAY_US, ACP_TIMEOUT);
+}
+
+static int acp_reset(void __iomem *base)
+{
+	u32 val;
+	int ret;
+
+	writel(1, base + ACP_SOFT_RESET);
+	ret = readl_poll_timeout(base + ACP_SOFT_RESET, val, val & ACP_SOFT_RST_DONE_MASK,
+				 DELAY_US, ACP_TIMEOUT);
+	if (ret)
+		return ret;
+
+	writel(0, base + ACP_SOFT_RESET);
+	return readl_poll_timeout(base + ACP_SOFT_RESET, val, !val, DELAY_US, ACP_TIMEOUT);
+}
+
+int acp_init(struct acp_chip_info *chip)
+{
+	int ret;
+
+	/* power on */
+	ret = acp_power_on(chip);
+	if (ret) {
+		pr_err("ACP power on failed\n");
+		return ret;
+	}
+	writel(0x01, chip->base + ACP_CONTROL);
+
+	/* Reset */
+	ret = acp_reset(chip->base);
+	if (ret) {
+		pr_err("ACP reset failed\n");
+		return ret;
+	}
+	return 0;
+}
+EXPORT_SYMBOL_NS_GPL(acp_init, SND_SOC_ACP_COMMON);
+
+int acp_deinit(void __iomem *base)
+{
+	int ret;
+
+	/* Reset */
+	ret = acp_reset(base);
+	if (ret)
+		return ret;
+
+	writel(0, base + ACP_CONTROL);
+	return 0;
+}
+EXPORT_SYMBOL_NS_GPL(acp_deinit, SND_SOC_ACP_COMMON);
+
+MODULE_LICENSE("Dual BSD/GPL");