diff options
Diffstat (limited to 'drivers/ata/ahci_ceva.c')
| -rw-r--r-- | drivers/ata/ahci_ceva.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/ata/ahci_ceva.c b/drivers/ata/ahci_ceva.c index eff40ec86065..ec9cfb52c6f6 100644 --- a/drivers/ata/ahci_ceva.c +++ b/drivers/ata/ahci_ceva.c @@ -32,6 +32,7 @@ #define AHCI_VEND_PP3C 0xB0 #define AHCI_VEND_PP4C 0xB4 #define AHCI_VEND_PP5C 0xB8 +#define AHCI_VEND_AXICC 0xBC #define AHCI_VEND_PAXIC 0xC0 #define AHCI_VEND_PTC 0xC8 @@ -41,6 +42,15 @@ #define PAXIC_MARIDD (1 << 16) #define PAXIC_OTL (0x4 << 20) +/* Register bit definitions for cache control */ +#define AXICC_ARCA_VAL (0xF << 0) +#define AXICC_ARCF_VAL (0xF << 4) +#define AXICC_ARCH_VAL (0xF << 8) +#define AXICC_ARCP_VAL (0xF << 12) +#define AXICC_AWCFD_VAL (0xF << 16) +#define AXICC_AWCD_VAL (0xF << 20) +#define AXICC_AWCF_VAL (0xF << 24) + #define PCFG_TPSS_VAL (0x32 << 16) #define PCFG_TPRS_VAL (0x2 << 12) #define PCFG_PAD_VAL 0x2 @@ -82,6 +92,9 @@ struct ceva_ahci_priv { u32 pp3c[NR_PORTS]; u32 pp4c[NR_PORTS]; u32 pp5c[NR_PORTS]; + /* Axi Cache Control Register */ + u32 axicc; + bool is_cci_enabled; int flags; }; @@ -139,6 +152,16 @@ static void ahci_ceva_setup(struct ahci_host_priv *hpriv) tmp = PCFG_TPSS_VAL | PCFG_TPRS_VAL | (PCFG_PAD_VAL + i); writel(tmp, mmio + AHCI_VEND_PCFG); + /* Set AXI cache control register if CCi is enabled */ + if (cevapriv->is_cci_enabled) { + tmp = readl(mmio + AHCI_VEND_AXICC); + tmp |= AXICC_ARCA_VAL | AXICC_ARCF_VAL | + AXICC_ARCH_VAL | AXICC_ARCP_VAL | + AXICC_AWCFD_VAL | AXICC_AWCD_VAL | + AXICC_AWCF_VAL; + writel(tmp, mmio + AHCI_VEND_AXICC); + } + /* Port Phy Cfg register enables */ tmp = PPCFG_TTA | PPCFG_PSS_EN | PPCFG_ESDF_EN; writel(tmp, mmio + AHCI_VEND_PPCFG); @@ -177,6 +200,7 @@ static int ceva_ahci_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct ahci_host_priv *hpriv; struct ceva_ahci_priv *cevapriv; + enum dev_dma_attr attr; int rc; cevapriv = devm_kzalloc(dev, sizeof(*cevapriv), GFP_KERNEL); @@ -248,6 +272,13 @@ static int ceva_ahci_probe(struct platform_device *pdev) return -EINVAL; } + /* + * Check if CCI is enabled for SATA. The DEV_DMA_COHERENT is returned + * if CCI is enabled, so check for DEV_DMA_COHERENT. + */ + attr = device_get_dma_attr(dev); + cevapriv->is_cci_enabled = (attr == DEV_DMA_COHERENT); + hpriv->plat_data = cevapriv; /* CEVA specific initialization */ |