From: Vijendar Mukunda Vijendar.Mukunda@amd.com
Add Vangogh ACP PCI driver init/deinit functions.
Signed-off-by: Vijendar Mukunda Vijendar.Mukunda@amd.com --- sound/soc/amd/vangogh/acp5x.h | 12 +++ sound/soc/amd/vangogh/pci-acp5x.c | 135 ++++++++++++++++++++++++++++++ 2 files changed, 147 insertions(+)
diff --git a/sound/soc/amd/vangogh/acp5x.h b/sound/soc/amd/vangogh/acp5x.h index a5e7f7cb65a1..11b555306958 100644 --- a/sound/soc/amd/vangogh/acp5x.h +++ b/sound/soc/amd/vangogh/acp5x.h @@ -9,6 +9,18 @@
#define ACP5x_PHY_BASE_ADDRESS 0x1240000 #define ACP_DEVICE_ID 0x15E2 +#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_ERR_INTR_MASK 0x20000000 +#define ACP_EXT_INTR_STAT_CLEAR_MASK 0xFFFFFFFF
static inline u32 acp_readl(void __iomem *base_addr) { diff --git a/sound/soc/amd/vangogh/pci-acp5x.c b/sound/soc/amd/vangogh/pci-acp5x.c index e56d060a5cb9..dbe8fef3e294 100644 --- a/sound/soc/amd/vangogh/pci-acp5x.c +++ b/sound/soc/amd/vangogh/pci-acp5x.c @@ -7,13 +7,138 @@ #include <linux/pci.h> #include <linux/module.h> #include <linux/io.h> +#include <linux/delay.h>
#include "acp5x.h"
+static int acp_power_gating; +module_param(acp_power_gating, int, 0644); +MODULE_PARM_DESC(acp_power_gating, "acp power gating flag"); + struct acp5x_dev_data { void __iomem *acp5x_base; };
+static int acp5x_power_on(void __iomem *acp5x_base) +{ + u32 val; + int timeout; + + val = acp_readl(acp5x_base + ACP_PGFSM_STATUS); + + if (val == 0) + return val; + + if ((val & ACP_PGFSM_STATUS_MASK) != + ACP_POWER_ON_IN_PROGRESS) + acp_writel(ACP_PGFSM_CNTL_POWER_ON_MASK, + acp5x_base + ACP_PGFSM_CONTROL); + timeout = 0; + while (++timeout < 500) { + val = acp_readl(acp5x_base + ACP_PGFSM_STATUS); + if (!val) + return 0; + udelay(1); + } + return -ETIMEDOUT; +} + +static int acp5x_power_off(void __iomem *acp5x_base) +{ + u32 val; + int timeout; + + acp_writel(ACP_PGFSM_CNTL_POWER_OFF_MASK, + acp5x_base + ACP_PGFSM_CONTROL); + timeout = 0; + while (++timeout < 500) { + val = acp_readl(acp5x_base + ACP_PGFSM_STATUS); + if ((val & ACP_PGFSM_STATUS_MASK) == ACP_POWERED_OFF) + return 0; + udelay(1); + } + return -ETIMEDOUT; +} + +static int acp5x_reset(void __iomem *acp5x_base) +{ + u32 val; + int timeout; + + acp_writel(1, acp5x_base + ACP_SOFT_RESET); + timeout = 0; + while (++timeout < 500) { + val = acp_readl(acp5x_base + ACP_SOFT_RESET); + if (val & ACP_SOFT_RESET_SOFTRESET_AUDDONE_MASK) + break; + cpu_relax(); + } + acp_writel(0, acp5x_base + ACP_SOFT_RESET); + timeout = 0; + while (++timeout < 500) { + val = acp_readl(acp5x_base + ACP_SOFT_RESET); + if (!val) + return 0; + cpu_relax(); + } + return -ETIMEDOUT; +} + +static void acp5x_enable_interrupts(void __iomem *acp5x_base) +{ + acp_writel(0x01, acp5x_base + ACP_EXTERNAL_INTR_ENB); +} + +static void acp5x_disable_interrupts(void __iomem *acp5x_base) +{ + acp_writel(ACP_EXT_INTR_STAT_CLEAR_MASK, acp5x_base + + ACP_EXTERNAL_INTR_STAT); + acp_writel(0x00, acp5x_base + ACP_EXTERNAL_INTR_CNTL); + acp_writel(0x00, acp5x_base + ACP_EXTERNAL_INTR_ENB); +} + +static int acp5x_init(void __iomem *acp5x_base) +{ + int ret; + + /* power on */ + ret = acp5x_power_on(acp5x_base); + if (ret) { + pr_err("ACP5x power on failed\n"); + return ret; + } + /* Reset */ + ret = acp5x_reset(acp5x_base); + if (ret) { + pr_err("ACP5x reset failed\n"); + return ret; + } + acp5x_enable_interrupts(acp5x_base); + return 0; +} + +static int acp5x_deinit(void __iomem *acp5x_base) +{ + int ret; + + acp5x_disable_interrupts(acp5x_base); + /* Reset */ + ret = acp5x_reset(acp5x_base); + if (ret) { + pr_err("ACP5x reset failed\n"); + return ret; + } + /* power off */ + if (acp_power_gating) { + ret = acp5x_power_off(acp5x_base); + if (ret) { + pr_err("ACP5x power off failed\n"); + return ret; + } + } + return 0; +} + static int snd_acp5x_probe(struct pci_dev *pci, const struct pci_device_id *pci_id) { @@ -50,6 +175,9 @@ static int snd_acp5x_probe(struct pci_dev *pci, } pci_set_master(pci); pci_set_drvdata(pci, adata); + ret = acp5x_init(adata->acp5x_base); + if (ret) + goto release_regions;
release_regions: pci_release_regions(pci); @@ -61,6 +189,13 @@ static int snd_acp5x_probe(struct pci_dev *pci,
static void snd_acp5x_remove(struct pci_dev *pci) { + struct acp5x_dev_data *adata; + int ret; + + adata = pci_get_drvdata(pci); + ret = acp5x_deinit(adata->acp5x_base); + if (ret) + dev_err(&pci->dev, "ACP de-init failed\n"); pci_release_regions(pci); pci_disable_device(pci); }