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Message-ID: <20211011055621.13240-4-Vijendar.Mukunda@amd.com>
Date: Mon, 11 Oct 2021 11:26:11 +0530
From: Vijendar Mukunda <Vijendar.Mukunda@....com>
To: <broonie@...nel.org>, <alsa-devel@...a-project.org>
CC: <Alexander.Deucher@....com>, <Basavaraj.Hiregoudar@....com>,
<Sunil-kumar.Dommati@....com>, <Mario.Limonciello@....com>,
<Richard.Gong@....com>,
Vijendar Mukunda <Vijendar.Mukunda@....com>,
"Liam Girdwood" <lgirdwood@...il.com>,
Jaroslav Kysela <perex@...ex.cz>,
"Takashi Iwai" <tiwai@...e.com>,
open list <linux-kernel@...r.kernel.org>
Subject: [PATCH 03/13] ASoC: amd: add acp6x init/de-init functions
Add Yellow Carp platform ACP6x PCI driver init/deinit functions.
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
---
sound/soc/amd/yc/acp6x.h | 12 ++++
sound/soc/amd/yc/pci-acp6x.c | 109 +++++++++++++++++++++++++++++++++++
2 files changed, 121 insertions(+)
diff --git a/sound/soc/amd/yc/acp6x.h b/sound/soc/amd/yc/acp6x.h
index 62a05db5e34c..76e9e860e9bb 100644
--- a/sound/soc/amd/yc/acp6x.h
+++ b/sound/soc/amd/yc/acp6x.h
@@ -10,6 +10,18 @@
#define ACP_DEVICE_ID 0x15E2
#define ACP6x_PHY_BASE_ADDRESS 0x1240000
+#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 acp6x_readl(void __iomem *base_addr)
{
return readl(base_addr - ACP6x_PHY_BASE_ADDRESS);
diff --git a/sound/soc/amd/yc/pci-acp6x.c b/sound/soc/amd/yc/pci-acp6x.c
index 2965e8b00314..56fd7cdbc442 100644
--- a/sound/soc/amd/yc/pci-acp6x.c
+++ b/sound/soc/amd/yc/pci-acp6x.c
@@ -7,6 +7,7 @@
#include <linux/pci.h>
#include <linux/module.h>
#include <linux/io.h>
+#include <linux/delay.h>
#include "acp6x.h"
@@ -14,6 +15,103 @@ 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 == 0)
+ 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)
{
@@ -52,6 +150,10 @@ 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);
@@ -63,6 +165,13 @@ static int snd_acp6x_probe(struct pci_dev *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);
}
--
2.25.1
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