From 10599205417ee3b1d29093c85bc210c9040a6bd4 Mon Sep 17 00:00:00 2001
From: Syed Saba Kareem <Syed.SabaKareem@amd.com>
Date: Thu, 21 Jul 2022 11:40:00 +0530
Subject: [PATCH] ASoC: amd: add RPL Platform init/de-init functions
Git-commit: 10599205417ee3b1d29093c85bc210c9040a6bd4
Patch-mainline: v6.0-rc1
References: jsc#PED-850

Add RPL Platform ACP init/de-init functions.

Signed-off-by: Syed Saba Kareem <Syed.SabaKareem@amd.com>
Reviewed-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Link: https://lore.kernel.org/r/20220721061035.91139-3-Syed.SabaKareem@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 sound/soc/amd/rpl/rpl-pci-acp6x.c | 92 +++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)

diff --git a/sound/soc/amd/rpl/rpl-pci-acp6x.c b/sound/soc/amd/rpl/rpl-pci-acp6x.c
index 7a82a978cf24..71ae90a00f36 100644
--- a/sound/soc/amd/rpl/rpl-pci-acp6x.c
+++ b/sound/soc/amd/rpl/rpl-pci-acp6x.c
@@ -17,6 +17,88 @@ struct rpl_dev_data {
 	void __iomem *acp6x_base;
 };
 
+static int rpl_power_on(void __iomem *acp_base)
+{
+	u32 val;
+	int timeout;
+
+	val = rpl_acp_readl(acp_base + ACP_PGFSM_STATUS);
+
+	if (!val)
+		return val;
+
+	if ((val & ACP_PGFSM_STATUS_MASK) != ACP_POWER_ON_IN_PROGRESS)
+		rpl_acp_writel(ACP_PGFSM_CNTL_POWER_ON_MASK, acp_base + ACP_PGFSM_CONTROL);
+	timeout = 0;
+	while (++timeout < 500) {
+		val = rpl_acp_readl(acp_base + ACP_PGFSM_STATUS);
+		if (!val)
+			return 0;
+		udelay(1);
+	}
+	return -ETIMEDOUT;
+}
+
+static int rpl_reset(void __iomem *acp_base)
+{
+	u32 val;
+	int timeout;
+
+	rpl_acp_writel(1, acp_base + ACP_SOFT_RESET);
+	timeout = 0;
+	while (++timeout < 500) {
+		val = rpl_acp_readl(acp_base + ACP_SOFT_RESET);
+		if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK)
+			break;
+		cpu_relax();
+	}
+	rpl_acp_writel(0, acp_base + ACP_SOFT_RESET);
+	timeout = 0;
+	while (++timeout < 500) {
+		val = rpl_acp_readl(acp_base + ACP_SOFT_RESET);
+		if (!val)
+			return 0;
+		cpu_relax();
+	}
+	return -ETIMEDOUT;
+}
+
+static int rpl_init(void __iomem *acp_base)
+{
+	int ret;
+
+	/* power on */
+	ret = rpl_power_on(acp_base);
+	if (ret) {
+		pr_err("ACP power on failed\n");
+		return ret;
+	}
+	rpl_acp_writel(0x01, acp_base + ACP_CONTROL);
+	/* Reset */
+	ret = rpl_reset(acp_base);
+	if (ret) {
+		pr_err("ACP reset failed\n");
+		return ret;
+	}
+	rpl_acp_writel(0x03, acp_base + ACP_CLKMUX_SEL);
+	return 0;
+}
+
+static int rpl_deinit(void __iomem *acp_base)
+{
+	int ret;
+
+	/* Reset */
+	ret = rpl_reset(acp_base);
+	if (ret) {
+		pr_err("ACP reset failed\n");
+		return ret;
+	}
+	rpl_acp_writel(0x00, acp_base + ACP_CLKMUX_SEL);
+	rpl_acp_writel(0x00, acp_base + ACP_CONTROL);
+	return 0;
+}
+
 static int snd_rpl_probe(struct pci_dev *pci,
 			 const struct pci_device_id *pci_id)
 {
@@ -59,6 +141,9 @@ static int snd_rpl_probe(struct pci_dev *pci,
 	}
 	pci_set_master(pci);
 	pci_set_drvdata(pci, adata);
+	ret = rpl_init(adata->acp6x_base);
+	if (ret)
+		goto release_regions;
 	return 0;
 release_regions:
 	pci_release_regions(pci);
@@ -70,6 +155,13 @@ static int snd_rpl_probe(struct pci_dev *pci,
 
 static void snd_rpl_remove(struct pci_dev *pci)
 {
+	struct rpl_dev_data *adata;
+	int ret;
+
+	adata = pci_get_drvdata(pci);
+	ret = rpl_deinit(adata->acp6x_base);
+	if (ret)
+		dev_err(&pci->dev, "ACP de-init failed\n");
 	pci_release_regions(pci);
 	pci_disable_device(pci);
 }
-- 
2.35.3