diff options
Diffstat (limited to 'arch/arm/mach-sunxi/cpu_info.c')
| -rw-r--r-- | arch/arm/mach-sunxi/cpu_info.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/arm/mach-sunxi/cpu_info.c b/arch/arm/mach-sunxi/cpu_info.c index 76b6719..f1f6fd5 100644 --- a/arch/arm/mach-sunxi/cpu_info.c +++ b/arch/arm/mach-sunxi/cpu_info.c @@ -99,10 +99,54 @@ int print_cpuinfo(void) } #endif +#ifdef CONFIG_MACH_SUN8I_H3 + +#define SIDC_PRCTL 0x40 +#define SIDC_RDKEY 0x60 + +#define SIDC_OP_LOCK 0xAC + +uint32_t sun8i_efuse_read(uint32_t offset) +{ + uint32_t reg_val; + + reg_val = readl(SUNXI_SIDC_BASE + SIDC_PRCTL); + reg_val &= ~(((0x1ff) << 16) | 0x3); + reg_val |= (offset << 16); + writel(reg_val, SUNXI_SIDC_BASE + SIDC_PRCTL); + + reg_val &= ~(((0xff) << 8) | 0x3); + reg_val |= (SIDC_OP_LOCK << 8) | 0x2; + writel(reg_val, SUNXI_SIDC_BASE + SIDC_PRCTL); + + while (readl(SUNXI_SIDC_BASE + SIDC_PRCTL) & 0x2); + + reg_val &= ~(((0x1ff) << 16) | ((0xff) << 8) | 0x3); + writel(reg_val, SUNXI_SIDC_BASE + SIDC_PRCTL); + + reg_val = readl(SUNXI_SIDC_BASE + SIDC_RDKEY); + return reg_val; +} +#endif + int sunxi_get_sid(unsigned int *sid) { #ifdef CONFIG_AXP221_POWER return axp_get_sid(sid); +#elif defined CONFIG_MACH_SUN8I_H3 + /* + * H3 SID controller has a bug, which makes the initial value of + * SUNXI_SID_BASE at boot wrong. + * Read the value directly from SID controller, in order to get + * the correct value, and also refresh the wrong value at + * SUNXI_SID_BASE. + */ + int i; + + for (i = 0; i< 4; i++) + sid[i] = sun8i_efuse_read(i * 4); + + return 0; #elif defined SUNXI_SID_BASE int i; |