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Date: Tue, 16 Aug 2022 12:18:37 +0530
From: Syed Saba Kareem <ssabakar@....com>
To: Amadeusz Sławiński
<amadeuszx.slawinski@...ux.intel.com>,
Syed Saba kareem <Syed.SabaKareem@....com>,
broonie@...nel.org, alsa-devel@...a-project.org
Cc: Sunil-kumar.Dommati@....com,
open list <linux-kernel@...r.kernel.org>,
Basavaraj.Hiregoudar@....com, Takashi Iwai <tiwai@...e.com>,
Liam Girdwood <lgirdwood@...il.com>, mario.limonciello@....com,
Vijendar.Mukunda@....com
Subject: Re: [PATCH 03/13] ASoC: amd: add acp6.2 init/de-init functions
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@....com>
>> Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
>> ---
>> 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);
>> }
>
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