diff options
Diffstat (limited to 'drivers/misc/npcm_host_intf.c')
| -rw-r--r-- | drivers/misc/npcm_host_intf.c | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/drivers/misc/npcm_host_intf.c b/drivers/misc/npcm_host_intf.c index 58bab888c3c..e3b0663625b 100644 --- a/drivers/misc/npcm_host_intf.c +++ b/drivers/misc/npcm_host_intf.c @@ -22,6 +22,8 @@ /* ESPI Register offsets */ #define ESPICFG 0x4 #define ESPIHINDP 0x80 +#define ESPI_TEN 0xF0 +#define ESPI_ENG 0xF1 /* MFSEL bit fileds */ #define MFSEL1_LPCSEL BIT(26) @@ -40,10 +42,23 @@ #define AUTO_HS2 BIT(12) #define AUTO_HS3 BIT(16) +#define ESPI_TEN_ENABLE 0x55 +#define ESPI_TEN_DISABLE 0 + +/* KCS/BPC interrupt control */ +#define BPCFEN 0x46 +#define FRIE BIT(3) +#define HRIE BIT(4) +#define KCS1CTL 0x18 +#define KCS2CTL 0x2a +#define KCS3CTL 0x3c +#define IBFIE BIT(0) +#define OBEIE BIT(1) + static int npcm_host_intf_bind(struct udevice *dev) { struct regmap *syscon; - void __iomem *base; + void __iomem *base, *kcs_base; u32 ch_supp, val; u32 ioaddr; const char *type; @@ -83,6 +98,13 @@ static int npcm_host_intf_bind(struct udevice *dev) val &= ~(CHSUPP_MASK | IOMODE_MASK | MAXFREQ_MASK); val |= IOMODE_SDQ | MAXFREQ_33MHZ | FIELD_PREP(CHSUPP_MASK, ch_supp); writel(val, base + ESPICFG); + + if (device_is_compatible(dev, "nuvoton,npcm845-host-intf")) { + /* Workaround: avoid eSPI module getting into wrong state */ + writeb(ESPI_TEN_ENABLE, base + ESPI_TEN); + writeb(BIT(6), base + ESPI_ENG); + writeb(ESPI_TEN_DISABLE, base + ESPI_TEN); + } } else if (!strcmp(type, "lpc")) { /* Select LPC pin function */ regmap_update_bits(syscon, MFSEL4, MFSEL4_ESPISEL, 0); @@ -92,6 +114,15 @@ static int npcm_host_intf_bind(struct udevice *dev) /* Release host wait */ setbits_8(SMC_CTL_REG_ADDR, SMC_CTL_HOSTWAIT); + kcs_base = dev_read_addr_index_ptr(dev, 1); + if (kcs_base) { + /* Disable KCS/BPC interrupts */ + clrbits_8(kcs_base + BPCFEN, FRIE | HRIE); + clrbits_8(kcs_base + KCS1CTL, IBFIE | OBEIE); + clrbits_8(kcs_base + KCS2CTL, IBFIE | OBEIE); + clrbits_8(kcs_base + KCS3CTL, IBFIE | OBEIE); + } + return 0; } |