diff options
| -rw-r--r-- | arch/mips/ath79/clock.c | 78 | ||||
| -rw-r--r-- | arch/mips/include/asm/mach-ath79/ar71xx_regs.h | 39 |
2 files changed, 117 insertions, 0 deletions
diff --git a/arch/mips/ath79/clock.c b/arch/mips/ath79/clock.c index 579f452c0b4..555e603de61 100644 --- a/arch/mips/ath79/clock.c +++ b/arch/mips/ath79/clock.c @@ -295,6 +295,82 @@ static void __init ar934x_clocks_init(void) iounmap(dpll_base); } +static void __init qca955x_clocks_init(void) +{ + u32 pll, out_div, ref_div, nint, frac, clk_ctrl, postdiv; + u32 cpu_pll, ddr_pll; + u32 bootstrap; + + bootstrap = ath79_reset_rr(QCA955X_RESET_REG_BOOTSTRAP); + if (bootstrap & QCA955X_BOOTSTRAP_REF_CLK_40) + ath79_ref_clk.rate = 40 * 1000 * 1000; + else + ath79_ref_clk.rate = 25 * 1000 * 1000; + + pll = ath79_pll_rr(QCA955X_PLL_CPU_CONFIG_REG); + out_div = (pll >> QCA955X_PLL_CPU_CONFIG_OUTDIV_SHIFT) & + QCA955X_PLL_CPU_CONFIG_OUTDIV_MASK; + ref_div = (pll >> QCA955X_PLL_CPU_CONFIG_REFDIV_SHIFT) & + QCA955X_PLL_CPU_CONFIG_REFDIV_MASK; + nint = (pll >> QCA955X_PLL_CPU_CONFIG_NINT_SHIFT) & + QCA955X_PLL_CPU_CONFIG_NINT_MASK; + frac = (pll >> QCA955X_PLL_CPU_CONFIG_NFRAC_SHIFT) & + QCA955X_PLL_CPU_CONFIG_NFRAC_MASK; + + cpu_pll = nint * ath79_ref_clk.rate / ref_div; + cpu_pll += frac * ath79_ref_clk.rate / (ref_div * (1 << 6)); + cpu_pll /= (1 << out_div); + + pll = ath79_pll_rr(QCA955X_PLL_DDR_CONFIG_REG); + out_div = (pll >> QCA955X_PLL_DDR_CONFIG_OUTDIV_SHIFT) & + QCA955X_PLL_DDR_CONFIG_OUTDIV_MASK; + ref_div = (pll >> QCA955X_PLL_DDR_CONFIG_REFDIV_SHIFT) & + QCA955X_PLL_DDR_CONFIG_REFDIV_MASK; + nint = (pll >> QCA955X_PLL_DDR_CONFIG_NINT_SHIFT) & + QCA955X_PLL_DDR_CONFIG_NINT_MASK; + frac = (pll >> QCA955X_PLL_DDR_CONFIG_NFRAC_SHIFT) & + QCA955X_PLL_DDR_CONFIG_NFRAC_MASK; + + ddr_pll = nint * ath79_ref_clk.rate / ref_div; + ddr_pll += frac * ath79_ref_clk.rate / (ref_div * (1 << 10)); + ddr_pll /= (1 << out_div); + + clk_ctrl = ath79_pll_rr(QCA955X_PLL_CLK_CTRL_REG); + + postdiv = (clk_ctrl >> QCA955X_PLL_CLK_CTRL_CPU_POST_DIV_SHIFT) & + QCA955X_PLL_CLK_CTRL_CPU_POST_DIV_MASK; + + if (clk_ctrl & QCA955X_PLL_CLK_CTRL_CPU_PLL_BYPASS) + ath79_cpu_clk.rate = ath79_ref_clk.rate; + else if (clk_ctrl & QCA955X_PLL_CLK_CTRL_CPUCLK_FROM_CPUPLL) + ath79_cpu_clk.rate = ddr_pll / (postdiv + 1); + else + ath79_cpu_clk.rate = cpu_pll / (postdiv + 1); + + postdiv = (clk_ctrl >> QCA955X_PLL_CLK_CTRL_DDR_POST_DIV_SHIFT) & + QCA955X_PLL_CLK_CTRL_DDR_POST_DIV_MASK; + + if (clk_ctrl & QCA955X_PLL_CLK_CTRL_DDR_PLL_BYPASS) + ath79_ddr_clk.rate = ath79_ref_clk.rate; + else if (clk_ctrl & QCA955X_PLL_CLK_CTRL_DDRCLK_FROM_DDRPLL) + ath79_ddr_clk.rate = cpu_pll / (postdiv + 1); + else + ath79_ddr_clk.rate = ddr_pll / (postdiv + 1); + + postdiv = (clk_ctrl >> QCA955X_PLL_CLK_CTRL_AHB_POST_DIV_SHIFT) & + QCA955X_PLL_CLK_CTRL_AHB_POST_DIV_MASK; + + if (clk_ctrl & QCA955X_PLL_CLK_CTRL_AHB_PLL_BYPASS) + ath79_ahb_clk.rate = ath79_ref_clk.rate; + else if (clk_ctrl & QCA955X_PLL_CLK_CTRL_AHBCLK_FROM_DDRPLL) + ath79_ahb_clk.rate = ddr_pll / (postdiv + 1); + else + ath79_ahb_clk.rate = cpu_pll / (postdiv + 1); + + ath79_wdt_clk.rate = ath79_ref_clk.rate; + ath79_uart_clk.rate = ath79_ref_clk.rate; +} + void __init ath79_clocks_init(void) { if (soc_is_ar71xx()) @@ -307,6 +383,8 @@ void __init ath79_clocks_init(void) ar933x_clocks_init(); else if (soc_is_ar934x()) ar934x_clocks_init(); + else if (soc_is_qca955x()) + qca955x_clocks_init(); else BUG(); diff --git a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h index 63a9f2b600b..7b00e12afc1 100644 --- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h +++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h @@ -225,6 +225,41 @@ #define AR934X_PLL_CPU_DDR_CLK_CTRL_DDRCLK_FROM_DDRPLL BIT(21) #define AR934X_PLL_CPU_DDR_CLK_CTRL_AHBCLK_FROM_DDRPLL BIT(24) +#define QCA955X_PLL_CPU_CONFIG_REG 0x00 +#define QCA955X_PLL_DDR_CONFIG_REG 0x04 +#define QCA955X_PLL_CLK_CTRL_REG 0x08 + +#define QCA955X_PLL_CPU_CONFIG_NFRAC_SHIFT 0 +#define QCA955X_PLL_CPU_CONFIG_NFRAC_MASK 0x3f +#define QCA955X_PLL_CPU_CONFIG_NINT_SHIFT 6 +#define QCA955X_PLL_CPU_CONFIG_NINT_MASK 0x3f +#define QCA955X_PLL_CPU_CONFIG_REFDIV_SHIFT 12 +#define QCA955X_PLL_CPU_CONFIG_REFDIV_MASK 0x1f +#define QCA955X_PLL_CPU_CONFIG_OUTDIV_SHIFT 19 +#define QCA955X_PLL_CPU_CONFIG_OUTDIV_MASK 0x3 + +#define QCA955X_PLL_DDR_CONFIG_NFRAC_SHIFT 0 +#define QCA955X_PLL_DDR_CONFIG_NFRAC_MASK 0x3ff +#define QCA955X_PLL_DDR_CONFIG_NINT_SHIFT 10 +#define QCA955X_PLL_DDR_CONFIG_NINT_MASK 0x3f +#define QCA955X_PLL_DDR_CONFIG_REFDIV_SHIFT 16 +#define QCA955X_PLL_DDR_CONFIG_REFDIV_MASK 0x1f +#define QCA955X_PLL_DDR_CONFIG_OUTDIV_SHIFT 23 +#define QCA955X_PLL_DDR_CONFIG_OUTDIV_MASK 0x7 + +#define QCA955X_PLL_CLK_CTRL_CPU_PLL_BYPASS BIT(2) +#define QCA955X_PLL_CLK_CTRL_DDR_PLL_BYPASS BIT(3) +#define QCA955X_PLL_CLK_CTRL_AHB_PLL_BYPASS BIT(4) +#define QCA955X_PLL_CLK_CTRL_CPU_POST_DIV_SHIFT 5 +#define QCA955X_PLL_CLK_CTRL_CPU_POST_DIV_MASK 0x1f +#define QCA955X_PLL_CLK_CTRL_DDR_POST_DIV_SHIFT 10 +#define QCA955X_PLL_CLK_CTRL_DDR_POST_DIV_MASK 0x1f +#define QCA955X_PLL_CLK_CTRL_AHB_POST_DIV_SHIFT 15 +#define QCA955X_PLL_CLK_CTRL_AHB_POST_DIV_MASK 0x1f +#define QCA955X_PLL_CLK_CTRL_CPUCLK_FROM_CPUPLL BIT(20) +#define QCA955X_PLL_CLK_CTRL_DDRCLK_FROM_DDRPLL BIT(21) +#define QCA955X_PLL_CLK_CTRL_AHBCLK_FROM_DDRPLL BIT(24) + /* * USB_CONFIG block */ @@ -264,6 +299,8 @@ #define AR934X_RESET_REG_BOOTSTRAP 0xb0 #define AR934X_RESET_REG_PCIE_WMAC_INT_STATUS 0xac +#define QCA955X_RESET_REG_BOOTSTRAP 0xb0 + #define MISC_INT_ETHSW BIT(12) #define MISC_INT_TIMER4 BIT(10) #define MISC_INT_TIMER3 BIT(9) @@ -341,6 +378,8 @@ #define AR934X_BOOTSTRAP_SDRAM_DISABLED BIT(1) #define AR934X_BOOTSTRAP_DDR1 BIT(0) +#define QCA955X_BOOTSTRAP_REF_CLK_40 BIT(4) + #define AR934X_PCIE_WMAC_INT_WMAC_MISC BIT(0) #define AR934X_PCIE_WMAC_INT_WMAC_TX BIT(1) #define AR934X_PCIE_WMAC_INT_WMAC_RXLP BIT(2) |