[PATCH v2 03/13] ASoC: amd: add acp6.2 init/de-init functions

[Syed Saba Kareem]

Add Pink Sardine platform ACP6.2 PCI driver init/deinit functions.

Signed-off-by: Syed Saba Kareem <Syed.SabaKareem at amd.com>
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda at amd.com>
---
 sound/soc/amd/ps/acp62.h  |  12 +++++
 sound/soc/amd/ps/pci-ps.c | 106 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 118 insertions(+)

diff --git a/sound/soc/amd/ps/acp62.h b/sound/soc/amd/ps/acp62.h
index 5291585f45f9..1f5e7d758f9f 100644
--- a/sound/soc/amd/ps/acp62.h
+++ b/sound/soc/amd/ps/acp62.h
@@ -9,6 +9,18 @@
 
 #define ACP_DEVICE_ID 0x15E2
 
+#define ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK	0x00010001
+#define ACP_PGFSM_CNTL_POWER_ON_MASK	1
+#define ACP_PGFSM_CNTL_POWER_OFF_MASK	0
+#define ACP_PGFSM_STATUS_MASK		3
+#define ACP_POWERED_ON			0
+#define ACP_POWER_ON_IN_PROGRESS	1
+#define ACP_POWERED_OFF		2
+#define ACP_POWER_OFF_IN_PROGRESS	3
+
+#define ACP_ERROR_MASK 0x20000000
+#define ACP_EXT_INTR_STAT_CLEAR_MASK 0xFFFFFFFF
+
 static inline u32 acp62_readl(void __iomem *base_addr)
 {
 	return readl(base_addr);
diff --git a/sound/soc/amd/ps/pci-ps.c b/sound/soc/amd/ps/pci-ps.c
index 8bb33845622a..a87dbf8847e6 100644
--- a/sound/soc/amd/ps/pci-ps.c
+++ b/sound/soc/amd/ps/pci-ps.c
@@ -8,6 +8,7 @@
 #include <linux/pci.h>
 #include <linux/module.h>
 #include <linux/io.h>
+#include <linux/delay.h>
 
 #include "acp62.h"
 
@@ -15,6 +16,100 @@ struct acp62_dev_data {
 	void __iomem *acp62_base;
 };
 
+static int acp62_power_on(void __iomem *acp_base)
+{
+	u32 val;
+	int timeout;
+
+	val = acp62_readl(acp_base + ACP_PGFSM_STATUS);
+
+	if (!val)
+		return val;
+
+	if ((val & ACP_PGFSM_STATUS_MASK) != ACP_POWER_ON_IN_PROGRESS)
+		acp62_writel(ACP_PGFSM_CNTL_POWER_ON_MASK, acp_base + ACP_PGFSM_CONTROL);
+	timeout = 0;
+	while (++timeout < 500) {
+		val = acp62_readl(acp_base + ACP_PGFSM_STATUS);
+		if (!val)
+			return 0;
+		udelay(1);
+	}
+	return -ETIMEDOUT;
+}
+
+static int acp62_reset(void __iomem *acp_base)
+{
+	u32 val;
+	int timeout;
+
+	acp62_writel(1, acp_base + ACP_SOFT_RESET);
+	timeout = 0;
+	while (++timeout < 500) {
+		val = acp62_readl(acp_base + ACP_SOFT_RESET);
+		if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK)
+			break;
+		cpu_relax();
+	}
+	acp62_writel(0, acp_base + ACP_SOFT_RESET);
+	timeout = 0;
+	while (++timeout < 500) {
+		val = acp62_readl(acp_base + ACP_SOFT_RESET);
+		if (!val)
+			return 0;
+		cpu_relax();
+	}
+	return -ETIMEDOUT;
+}
+
+static void acp62_enable_interrupts(void __iomem *acp_base)
+{
+	acp62_writel(1, acp_base + ACP_EXTERNAL_INTR_ENB);
+}
+
+static void acp62_disable_interrupts(void __iomem *acp_base)
+{
+	acp62_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp_base +
+		     ACP_EXTERNAL_INTR_STAT);
+	acp62_writel(0, acp_base + ACP_EXTERNAL_INTR_CNTL);
+	acp62_writel(0, acp_base + ACP_EXTERNAL_INTR_ENB);
+}
+
+static int acp62_init(void __iomem *acp_base, struct device *dev)
+{
+	int ret;
+
+	ret = acp62_power_on(acp_base);
+	if (ret) {
+		dev_err(dev, "ACP power on failed\n");
+		return ret;
+	}
+	acp62_writel(0x01, acp_base + ACP_CONTROL);
+	ret = acp62_reset(acp_base);
+	if (ret) {
+		dev_err(dev, "ACP reset failed\n");
+		return ret;
+	}
+	acp62_writel(0x03, acp_base + ACP_CLKMUX_SEL);
+	acp62_enable_interrupts(acp_base);
+	return 0;
+}
+
+static int acp62_deinit(void __iomem *acp_base, struct device *dev)
+{
+	int ret;
+
+	acp62_disable_interrupts(acp_base);
+	ret = acp62_reset(acp_base);
+	if (ret) {
+		dev_err(dev, "ACP reset failed\n");
+		return ret;
+	}
+	acp62_writel(0, acp_base + ACP_CLKMUX_SEL);
+	acp62_writel(0, acp_base + ACP_CONTROL);
+	return 0;
+}
+
 static int snd_acp62_probe(struct pci_dev *pci,
 			   const struct pci_device_id *pci_id)
 {
@@ -56,6 +151,10 @@ static int snd_acp62_probe(struct pci_dev *pci,
 	}
 	pci_set_master(pci);
 	pci_set_drvdata(pci, adata);
+	ret = acp62_init(adata->acp62_base, &pci->dev);
+	if (ret)
+		goto release_regions;
+
 	return 0;
 release_regions:
 	pci_release_regions(pci);
@@ -67,6 +166,13 @@ static int snd_acp62_probe(struct pci_dev *pci,
 
 static void snd_acp62_remove(struct pci_dev *pci)
 {
+	struct acp62_dev_data *adata;
+	int ret;
+
+	adata = pci_get_drvdata(pci);
+	ret = acp62_deinit(adata->acp62_base, &pci->dev);
+	if (ret)
+		dev_err(&pci->dev, "ACP de-init failed\n");
 	pci_release_regions(pci);
 	pci_disable_device(pci);
 }
-- 
2.25.1