1 files changed, 109 insertions, 0 deletions

diff --git a/sound/soc/amd/yc/pci-acp6x.c b/sound/soc/amd/yc/pci-acp6x.c
index 5c118328ea21..03af3476a97c 100644
--- a/sound/soc/amd/yc/pci-acp6x.c
+++ b/sound/soc/amd/yc/pci-acp6x.c
@@ -8,6 +8,7 @@
 #include <linux/pci.h>
 #include <linux/module.h>
 #include <linux/io.h>
+#include <linux/delay.h>
 
 #include "acp6x.h"
 
@@ -15,6 +16,103 @@ struct acp6x_dev_data {
 	void __iomem *acp6x_base;
 };
 
+static int acp6x_power_on(void __iomem *acp_base)
+{
+	u32 val;
+	int timeout;
+
+	val = acp6x_readl(acp_base + ACP_PGFSM_STATUS);
+
+	if (!val)
+		return val;
+
+	if ((val & ACP_PGFSM_STATUS_MASK) != ACP_POWER_ON_IN_PROGRESS)
+		acp6x_writel(ACP_PGFSM_CNTL_POWER_ON_MASK, acp_base + ACP_PGFSM_CONTROL);
+	timeout = 0;
+	while (++timeout < 500) {
+		val = acp6x_readl(acp_base + ACP_PGFSM_STATUS);
+		if (!val)
+			return 0;
+		udelay(1);
+	}
+	return -ETIMEDOUT;
+}
+
+static int acp6x_reset(void __iomem *acp_base)
+{
+	u32 val;
+	int timeout;
+
+	acp6x_writel(1, acp_base + ACP_SOFT_RESET);
+	timeout = 0;
+	while (++timeout < 500) {
+		val = acp6x_readl(acp_base + ACP_SOFT_RESET);
+		if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK)
+			break;
+		cpu_relax();
+	}
+	acp6x_writel(0, acp_base + ACP_SOFT_RESET);
+	timeout = 0;
+	while (++timeout < 500) {
+		val = acp6x_readl(acp_base + ACP_SOFT_RESET);
+		if (!val)
+			return 0;
+		cpu_relax();
+	}
+	return -ETIMEDOUT;
+}
+
+static void acp6x_enable_interrupts(void __iomem *acp_base)
+{
+	acp6x_writel(0x01, acp_base + ACP_EXTERNAL_INTR_ENB);
+}
+
+static void acp6x_disable_interrupts(void __iomem *acp_base)
+{
+	acp6x_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp_base +
+		     ACP_EXTERNAL_INTR_STAT);
+	acp6x_writel(0x00, acp_base + ACP_EXTERNAL_INTR_CNTL);
+	acp6x_writel(0x00, acp_base + ACP_EXTERNAL_INTR_ENB);
+}
+
+static int acp6x_init(void __iomem *acp_base)
+{
+	int ret;
+
+	/* power on */
+	ret = acp6x_power_on(acp_base);
+	if (ret) {
+		pr_err("ACP power on failed\n");
+		return ret;
+	}
+	acp6x_writel(0x01, acp_base + ACP_CONTROL);
+	/* Reset */
+	ret = acp6x_reset(acp_base);
+	if (ret) {
+		pr_err("ACP reset failed\n");
+		return ret;
+	}
+	acp6x_writel(0x03, acp_base + ACP_CLKMUX_SEL);
+	acp6x_enable_interrupts(acp_base);
+	return 0;
+}
+
+static int acp6x_deinit(void __iomem *acp_base)
+{
+	int ret;
+
+	acp6x_disable_interrupts(acp_base);
+	/* Reset */
+	ret = acp6x_reset(acp_base);
+	if (ret) {
+		pr_err("ACP reset failed\n");
+		return ret;
+	}
+	acp6x_writel(0x00, acp_base + ACP_CLKMUX_SEL);
+	acp6x_writel(0x00, acp_base + ACP_CONTROL);
+	return 0;
+}
+
 static int snd_acp6x_probe(struct pci_dev *pci,
 			   const struct pci_device_id *pci_id)
 {
@@ -53,6 +151,10 @@ static int snd_acp6x_probe(struct pci_dev *pci,
 	}
 	pci_set_master(pci);
 	pci_set_drvdata(pci, adata);
+	ret = acp6x_init(adata->acp6x_base);
+	if (ret)
+		goto release_regions;
+
 	return 0;
 release_regions:
 	pci_release_regions(pci);
@@ -64,6 +166,13 @@ disable_pci:
 
 static void snd_acp6x_remove(struct pci_dev *pci)
 {
+	struct acp6x_dev_data *adata;
+	int ret;
+
+	adata = pci_get_drvdata(pci);
+	ret = acp6x_deinit(adata->acp6x_base);
+	if (ret)
+		dev_err(&pci->dev, "ACP de-init failed\n");
 	pci_release_regions(pci);
 	pci_disable_device(pci);
 }