From: Vijendar Mukunda Vijendar.Mukunda@amd.com
Add Renoir ACP PCI driver init/deinit functions.
Signed-off-by: Vijendar Mukunda Vijendar.Mukunda@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com --- sound/soc/amd/renoir/rn-pci-acp3x.c | 143 ++++++++++++++++++++++++++++ sound/soc/amd/renoir/rn_acp3x.h | 16 ++++ 2 files changed, 159 insertions(+)
diff --git a/sound/soc/amd/renoir/rn-pci-acp3x.c b/sound/soc/amd/renoir/rn-pci-acp3x.c index 56b76e355cd4..429813f6ba1c 100644 --- a/sound/soc/amd/renoir/rn-pci-acp3x.c +++ b/sound/soc/amd/renoir/rn-pci-acp3x.c @@ -7,13 +7,146 @@ #include <linux/pci.h> #include <linux/module.h> #include <linux/io.h> +#include <linux/delay.h>
#include "rn_acp3x.h"
+static int acp_power_gating; +module_param(acp_power_gating, int, 0644); +MODULE_PARM_DESC(acp_power_gating, "Enable acp power gating"); + struct acp_dev_data { void __iomem *acp_base; };
+static int rn_acp_power_on(void __iomem *acp_base) +{ + u32 val; + int timeout; + + val = rn_readl(acp_base + ACP_PGFSM_STATUS); + + if (val == 0) + return val; + + if ((val & ACP_PGFSM_STATUS_MASK) != + ACP_POWER_ON_IN_PROGRESS) + rn_writel(ACP_PGFSM_CNTL_POWER_ON_MASK, + acp_base + ACP_PGFSM_CONTROL); + timeout = 0; + while (++timeout < 500) { + val = rn_readl(acp_base + ACP_PGFSM_STATUS); + if (!val) + return 0; + udelay(1); + } + return -ETIMEDOUT; +} + +static int rn_acp_power_off(void __iomem *acp_base) +{ + u32 val; + int timeout; + + rn_writel(ACP_PGFSM_CNTL_POWER_OFF_MASK, + acp_base + ACP_PGFSM_CONTROL); + timeout = 0; + while (++timeout < 500) { + val = rn_readl(acp_base + ACP_PGFSM_STATUS); + if ((val & ACP_PGFSM_STATUS_MASK) == ACP_POWERED_OFF) + return 0; + udelay(1); + } + return -ETIMEDOUT; +} + +static int rn_acp_reset(void __iomem *acp_base) +{ + u32 val; + int timeout; + + rn_writel(1, acp_base + ACP_SOFT_RESET); + timeout = 0; + while (++timeout < 500) { + val = rn_readl(acp_base + ACP_SOFT_RESET); + if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK) + break; + cpu_relax(); + } + rn_writel(0, acp_base + ACP_SOFT_RESET); + timeout = 0; + while (++timeout < 500) { + val = rn_readl(acp_base + ACP_SOFT_RESET); + if (!val) + return 0; + cpu_relax(); + } + return -ETIMEDOUT; +} + +static void rn_acp_enable_interrupts(void __iomem *acp_base) +{ + u32 ext_intr_ctrl; + + rn_writel(0x01, acp_base + ACP_EXTERNAL_INTR_ENB); + ext_intr_ctrl = rn_readl(acp_base + ACP_EXTERNAL_INTR_CNTL); + ext_intr_ctrl |= ACP_ERROR_MASK; + rn_writel(ext_intr_ctrl, acp_base + ACP_EXTERNAL_INTR_CNTL); +} + +static void rn_acp_disable_interrupts(void __iomem *acp_base) +{ + rn_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp_base + + ACP_EXTERNAL_INTR_STAT); + rn_writel(0x00, acp_base + ACP_EXTERNAL_INTR_ENB); +} + +static int rn_acp_init(void __iomem *acp_base) +{ + int ret; + + /* power on */ + ret = rn_acp_power_on(acp_base); + if (ret) { + pr_err("ACP power on failed\n"); + return ret; + } + rn_writel(0x01, acp_base + ACP_CONTROL); + /* Reset */ + ret = rn_acp_reset(acp_base); + if (ret) { + pr_err("ACP reset failed\n"); + return ret; + } + rn_writel(0x03, acp_base + ACP_CLKMUX_SEL); + rn_acp_enable_interrupts(acp_base); + return 0; +} + +static int rn_acp_deinit(void __iomem *acp_base) +{ + int ret; + + rn_acp_disable_interrupts(acp_base); + /* Reset */ + ret = rn_acp_reset(acp_base); + if (ret) { + pr_err("ACP reset failed\n"); + return ret; + } + rn_writel(0x00, acp_base + ACP_CLKMUX_SEL); + rn_writel(0x00, acp_base + ACP_CONTROL); + /* power off */ + if (acp_power_gating) { + ret = rn_acp_power_off(acp_base); + if (ret) { + pr_err("ACP power off failed\n"); + return ret; + } + } + return 0; +} + static int snd_rn_acp_probe(struct pci_dev *pci, const struct pci_device_id *pci_id) { @@ -48,6 +181,9 @@ static int snd_rn_acp_probe(struct pci_dev *pci, } pci_set_master(pci); pci_set_drvdata(pci, adata); + ret = rn_acp_init(adata->acp_base); + if (ret) + goto release_regions; return 0;
release_regions: @@ -60,6 +196,13 @@ static int snd_rn_acp_probe(struct pci_dev *pci,
static void snd_rn_acp_remove(struct pci_dev *pci) { + struct acp_dev_data *adata; + int ret; + + adata = pci_get_drvdata(pci); + ret = rn_acp_deinit(adata->acp_base); + if (ret) + dev_err(&pci->dev, "ACP de-init failed\n"); pci_disable_msi(pci); pci_release_regions(pci); pci_disable_device(pci); diff --git a/sound/soc/amd/renoir/rn_acp3x.h b/sound/soc/amd/renoir/rn_acp3x.h index da5715759646..ec2a85085163 100644 --- a/sound/soc/amd/renoir/rn_acp3x.h +++ b/sound/soc/amd/renoir/rn_acp3x.h @@ -9,6 +9,22 @@
#define ACP_PHY_BASE_ADDRESS 0x1240000 #define ACP_DEVICE_ID 0x15E2 +#define ACP_POWER_ON 0x00 +#define ACP_POWER_ON_IN_PROGRESS 0x01 +#define ACP_POWER_OFF 0x02 +#define ACP_POWER_OFF_IN_PROGRESS 0x03 +#define ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK 0x00010001 + +#define ACP_PGFSM_CNTL_POWER_ON_MASK 0x01 +#define ACP_PGFSM_CNTL_POWER_OFF_MASK 0x00 +#define ACP_PGFSM_STATUS_MASK 0x03 +#define ACP_POWERED_ON 0x00 +#define ACP_POWER_ON_IN_PROGRESS 0x01 +#define ACP_POWERED_OFF 0x02 +#define ACP_POWER_OFF_IN_PROGRESS 0x03 + +#define ACP_ERROR_MASK 0x20000000 +#define ACP_EXT_INTR_STAT_CLEAR_MASK 0xFFFFFFFF
static inline u32 rn_readl(void __iomem *base_addr) {