diff options
Diffstat (limited to 'target/linux/ar71xx')
| -rw-r--r-- | target/linux/ar71xx/files/arch/mips/ar71xx/setup.c | 52 | ||||
| -rw-r--r-- | target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h | 8 |
2 files changed, 48 insertions, 12 deletions
diff --git a/target/linux/ar71xx/files/arch/mips/ar71xx/setup.c b/target/linux/ar71xx/files/arch/mips/ar71xx/setup.c index e12fdbf54..f7601059e 100644 --- a/target/linux/ar71xx/files/arch/mips/ar71xx/setup.c +++ b/target/linux/ar71xx/files/arch/mips/ar71xx/setup.c @@ -183,39 +183,67 @@ static void __init ar71xx_detect_sys_type(void) static void __init ar934x_detect_sys_frequency(void) { u32 pll, out_div, ref_div, nint, frac, clk_ctrl, postdiv; + u32 cpu_pll, ddr_pll; if (ar71xx_reset_rr(AR934X_RESET_REG_BOOTSTRAP) & AR934X_REF_CLK_40) ar71xx_ref_freq = 40 * 1000 * 1000; else ar71xx_ref_freq = 25 * 1000 * 1000; - clk_ctrl = ar71xx_pll_rr(AR934X_PLL_REG_DDR_CTRL_CLOCK); - pll = ar71xx_pll_rr(AR934X_PLL_REG_CPU_CONFIG); out_div = AR934X_CPU_PLL_CFG_OUTDIV_GET(pll); ref_div = AR934X_CPU_PLL_CFG_REFDIV_GET(pll); nint = AR934X_CPU_PLL_CFG_NINT_GET(pll); frac = AR934X_CPU_PLL_CFG_NFRAC_GET(pll); - postdiv = AR934X_CPU_DDR_CLK_CTRL_CPU_POST_DIV_GET(clk_ctrl); - ar71xx_cpu_freq = ((nint * ar71xx_ref_freq / ref_div) >> out_div) / - (postdiv + 1); + cpu_pll = nint * ar71xx_ref_freq / ref_div; + cpu_pll += frac * ar71xx_ref_freq / (ref_div * (2 << 6)); + cpu_pll /= (1 << out_div); + + pll = ar71xx_pll_rr(AR934X_PLL_REG_DDR_CONFIG); out_div = AR934X_DDR_PLL_CFG_OUTDIV_GET(pll); ref_div = AR934X_DDR_PLL_CFG_REFDIV_GET(pll); nint = AR934X_DDR_PLL_CFG_NINT_GET(pll); frac = AR934X_DDR_PLL_CFG_NFRAC_GET(pll); - postdiv = AR934X_CPU_DDR_CLK_CTRL_DDR_POST_DIV_GET(clk_ctrl); - ar71xx_ddr_freq = ((nint * ar71xx_ref_freq / ref_div) >> out_div) / - (postdiv + 1); - postdiv = AR934X_CPU_DDR_CLK_CTRL_AHB_POST_DIV_GET(clk_ctrl); + ddr_pll = nint * ar71xx_ref_freq / ref_div; + ddr_pll += frac * ar71xx_ref_freq / (ref_div * (2 << 10)); + ddr_pll /= (1 << out_div); + + clk_ctrl = ar71xx_pll_rr(AR934X_PLL_REG_DDR_CTRL_CLOCK); + + if (clk_ctrl & AR934X_CPU_DDR_CLK_CTRL_CPU_PLL_BYPASS) { + ar71xx_cpu_freq = ar71xx_ref_freq; + } else { + postdiv = AR934X_CPU_DDR_CLK_CTRL_CPU_POST_DIV_GET(clk_ctrl); + + if (clk_ctrl & AR934X_CPU_DDR_CLK_CTRL_CPUCLK_FROM_CPUPLL) + ar71xx_cpu_freq = cpu_pll / (postdiv + 1); + else + ar71xx_cpu_freq = ddr_pll / (postdiv + 1); + } - if (AR934X_CPU_DDR_CLK_CTRL_AHBCLK_FROM_DDRPLL_GET(clk_ctrl)) { - ar71xx_ahb_freq = ar71xx_ddr_freq / (postdiv + 1); + if (clk_ctrl & AR934X_CPU_DDR_CLK_CTRL_DDR_PLL_BYPASS) { + ar71xx_ddr_freq = ar71xx_ref_freq; } else { - ar71xx_ahb_freq = ar71xx_cpu_freq / (postdiv + 1); + postdiv = AR934X_CPU_DDR_CLK_CTRL_DDR_POST_DIV_GET(clk_ctrl); + + if (clk_ctrl & AR934X_CPU_DDR_CLK_CTRL_DDRCLK_FROM_DDRPLL) + ar71xx_ddr_freq = ddr_pll / (postdiv + 1); + else + ar71xx_ddr_freq = cpu_pll / (postdiv + 1); } + if (clk_ctrl & AR934X_CPU_DDR_CLK_CTRL_AHB_PLL_BYPASS) { + ar71xx_ahb_freq = ar71xx_ref_freq; + } else { + postdiv = AR934X_CPU_DDR_CLK_CTRL_AHB_POST_DIV_GET(clk_ctrl); + + if (clk_ctrl & AR934X_CPU_DDR_CLK_CTRL_AHBCLK_FROM_DDRPLL) + ar71xx_ahb_freq = ddr_pll / (postdiv + 1); + else + ar71xx_ahb_freq = cpu_pll / (postdiv + 1); + } } static void __init ar91xx_detect_sys_frequency(void) diff --git a/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h b/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h index 97ac835dc..87a352cc4 100644 --- a/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h +++ b/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/ar71xx.h @@ -212,6 +212,7 @@ extern enum ar71xx_soc_type ar71xx_soc; #define AR933X_PLL_CLOCK_CTRL_AHB_DIV_MASK 0x7 #define AR934X_PLL_REG_CPU_CONFIG 0x00 +#define AR934X_PLL_REG_DDR_CONFIG 0x04 #define AR934X_PLL_REG_DDR_CTRL_CLOCK 0x8 #define AR934X_CPU_PLL_CFG_OUTDIV_MSB 21 @@ -372,6 +373,13 @@ extern enum ar71xx_soc_type ar71xx_soc; #define AR934X_CPU_DDR_CLK_CTRL_AHBCLK_FROM_DDRPLL_RESET 1 +#define AR934X_CPU_DDR_CLK_CTRL_CPU_PLL_BYPASS BIT(2) +#define AR934X_CPU_DDR_CLK_CTRL_DDR_PLL_BYPASS BIT(3) +#define AR934X_CPU_DDR_CLK_CTRL_AHB_PLL_BYPASS BIT(4) +#define AR934X_CPU_DDR_CLK_CTRL_CPUCLK_FROM_CPUPLL BIT(20) +#define AR934X_CPU_DDR_CLK_CTRL_DDRCLK_FROM_DDRPLL BIT(21) +#define AR934X_CPU_DDR_CLK_CTRL_AHBCLK_FROM_DDRPLL BIT(24) + extern void __iomem *ar71xx_pll_base; static inline void ar71xx_pll_wr(unsigned reg, u32 val) |