Re: [PATCH 03/13] ASoC: amd: add acp6.2 init/de-init functions
From: Syed Saba Kareem
Date: Tue Aug 16 2022 - 04:45:52 EST
On 8/12/22 19:49, Amadeusz Sławiński wrote:
[CAUTION: External Email]
On 8/12/2022 2:07 PM, Syed Saba kareem wrote:
Add Pink Sardine platform ACP6.2 PCI driver init/deinit functions.
Signed-off-by: Syed Saba Kareem <Syed.SabaKareem@xxxxxxx>
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@xxxxxxx>
---
sound/soc/amd/ps/acp62.h | 12 +++++
sound/soc/amd/ps/pci-ps.c | 109 ++++++++++++++++++++++++++++++++++++++
2 files changed, 121 insertions(+)
diff --git a/sound/soc/amd/ps/acp62.h b/sound/soc/amd/ps/acp62.h
index e91762240c93..8e734f190b11 100644
--- a/sound/soc/amd/ps/acp62.h
+++ b/sound/soc/amd/ps/acp62.h
@@ -10,6 +10,18 @@
#define ACP_DEVICE_ID 0x15E2
#define ACP62_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 acp62_readl(void __iomem *base_addr)
{
return readl(base_addr - ACP62_PHY_BASE_ADDRESS);
diff --git a/sound/soc/amd/ps/pci-ps.c b/sound/soc/amd/ps/pci-ps.c
index 25169797275c..2014f415af15 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 +16,103 @@ 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(0x01, acp_base + ACP_EXTERNAL_INTR_ENB);
In function before you just write decimal 1 and 0, and here and later in
patch you use hex values? Should probably be consistent.
Will fix it.
+}
+
+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(0x00, acp_base + ACP_EXTERNAL_INTR_CNTL);
+ acp62_writel(0x00, acp_base + ACP_EXTERNAL_INTR_ENB);
+}
+
+static int acp62_init(void __iomem *acp_base)
+{
+ int ret;
+
+ /* power on */
Unnecessary comment? Called function name is already self explanatory,
no need to repeat it.
Will remove it.
+ ret = acp62_power_on(acp_base);
+ if (ret) {
+ pr_err("ACP power on failed\n");
+ return ret;
+ }
+ acp62_writel(0x01, acp_base + ACP_CONTROL);
+ /* Reset */
Same here?
Will remove it.
+ ret = acp62_reset(acp_base);
+ if (ret) {
+ pr_err("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)
+{
+ int ret;
+
+ acp62_disable_interrupts(acp_base);
+ /* Reset */
Again
Will remove it.
+ ret = acp62_reset(acp_base);
+ if (ret) {
+ pr_err("ACP reset failed\n");
+ return ret;
+ }
+ acp62_writel(0x00, acp_base + ACP_CLKMUX_SEL);
+ acp62_writel(0x00, acp_base + ACP_CONTROL);
+ return 0;
+}
+
static int snd_acp62_probe(struct pci_dev *pci,
const struct pci_device_id *pci_id)
{
@@ -56,6 +154,10 @@ static int snd_acp62_probe(struct pci_dev *pci,
}
pci_set_master(pci);
pci_set_drvdata(pci, adata);
+ ret = acp62_init(adata->acp62_base);
+ if (ret)
+ goto release_regions;
+
return 0;
release_regions:
pci_release_regions(pci);
@@ -67,6 +169,13 @@ 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);
+ if (ret)
+ dev_err(&pci->dev, "ACP de-init failed\n");
pci_release_regions(pci);
pci_disable_device(pci);
}