diff options
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/ath79/clock.c | 81 | ||||
| -rw-r--r-- | arch/mips/include/asm/mach-ath79/ar71xx_regs.h | 53 |
2 files changed, 134 insertions, 0 deletions
diff --git a/arch/mips/ath79/clock.c b/arch/mips/ath79/clock.c index 54d0eb4db987..b91ad3efe29e 100644 --- a/arch/mips/ath79/clock.c +++ b/arch/mips/ath79/clock.c @@ -1,8 +1,11 @@ /* * Atheros AR71XX/AR724X/AR913X common routines * + * Copyright (C) 2010-2011 Jaiganesh Narayanan <jnarayanan@atheros.com> * Copyright (C) 2011 Gabor Juhos <juhosg@openwrt.org> * + * Parts of this file are based on Atheros' 2.6.15/2.6.31 BSP + * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published * by the Free Software Foundation. @@ -163,6 +166,82 @@ static void __init ar933x_clocks_init(void) ath79_uart_clk.rate = ath79_ref_clk.rate; } +static void __init ar934x_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(AR934X_RESET_REG_BOOTSTRAP); + if (bootstrap & AR934X_BOOTSTRAP_REF_CLK_40) + ath79_ref_clk.rate = 40 * 1000 * 1000; + else + ath79_ref_clk.rate = 25 * 1000 * 1000; + + pll = ath79_pll_rr(AR934X_PLL_CPU_CONFIG_REG); + out_div = (pll >> AR934X_PLL_CPU_CONFIG_OUTDIV_SHIFT) & + AR934X_PLL_CPU_CONFIG_OUTDIV_MASK; + ref_div = (pll >> AR934X_PLL_CPU_CONFIG_REFDIV_SHIFT) & + AR934X_PLL_CPU_CONFIG_REFDIV_MASK; + nint = (pll >> AR934X_PLL_CPU_CONFIG_NINT_SHIFT) & + AR934X_PLL_CPU_CONFIG_NINT_MASK; + frac = (pll >> AR934X_PLL_CPU_CONFIG_NFRAC_SHIFT) & + AR934X_PLL_CPU_CONFIG_NFRAC_MASK; + + cpu_pll = nint * ath79_ref_clk.rate / ref_div; + cpu_pll += frac * ath79_ref_clk.rate / (ref_div * (2 << 6)); + cpu_pll /= (1 << out_div); + + pll = ath79_pll_rr(AR934X_PLL_DDR_CONFIG_REG); + out_div = (pll >> AR934X_PLL_DDR_CONFIG_OUTDIV_SHIFT) & + AR934X_PLL_DDR_CONFIG_OUTDIV_MASK; + ref_div = (pll >> AR934X_PLL_DDR_CONFIG_REFDIV_SHIFT) & + AR934X_PLL_DDR_CONFIG_REFDIV_MASK; + nint = (pll >> AR934X_PLL_DDR_CONFIG_NINT_SHIFT) & + AR934X_PLL_DDR_CONFIG_NINT_MASK; + frac = (pll >> AR934X_PLL_DDR_CONFIG_NFRAC_SHIFT) & + AR934X_PLL_DDR_CONFIG_NFRAC_MASK; + + ddr_pll = nint * ath79_ref_clk.rate / ref_div; + ddr_pll += frac * ath79_ref_clk.rate / (ref_div * (2 << 10)); + ddr_pll /= (1 << out_div); + + clk_ctrl = ath79_pll_rr(AR934X_PLL_CPU_DDR_CLK_CTRL_REG); + + postdiv = (clk_ctrl >> AR934X_PLL_CPU_DDR_CLK_CTRL_CPU_POST_DIV_SHIFT) & + AR934X_PLL_CPU_DDR_CLK_CTRL_CPU_POST_DIV_MASK; + + if (clk_ctrl & AR934X_PLL_CPU_DDR_CLK_CTRL_CPU_PLL_BYPASS) + ath79_cpu_clk.rate = ath79_ref_clk.rate; + else if (clk_ctrl & AR934X_PLL_CPU_DDR_CLK_CTRL_CPUCLK_FROM_CPUPLL) + ath79_cpu_clk.rate = cpu_pll / (postdiv + 1); + else + ath79_cpu_clk.rate = ddr_pll / (postdiv + 1); + + postdiv = (clk_ctrl >> AR934X_PLL_CPU_DDR_CLK_CTRL_DDR_POST_DIV_SHIFT) & + AR934X_PLL_CPU_DDR_CLK_CTRL_DDR_POST_DIV_MASK; + + if (clk_ctrl & AR934X_PLL_CPU_DDR_CLK_CTRL_DDR_PLL_BYPASS) + ath79_ddr_clk.rate = ath79_ref_clk.rate; + else if (clk_ctrl & AR934X_PLL_CPU_DDR_CLK_CTRL_DDRCLK_FROM_DDRPLL) + ath79_ddr_clk.rate = ddr_pll / (postdiv + 1); + else + ath79_ddr_clk.rate = cpu_pll / (postdiv + 1); + + postdiv = (clk_ctrl >> AR934X_PLL_CPU_DDR_CLK_CTRL_AHB_POST_DIV_SHIFT) & + AR934X_PLL_CPU_DDR_CLK_CTRL_AHB_POST_DIV_MASK; + + if (clk_ctrl & AR934X_PLL_CPU_DDR_CLK_CTRL_AHB_PLL_BYPASS) + ath79_ahb_clk.rate = ath79_ref_clk.rate; + else if (clk_ctrl & AR934X_PLL_CPU_DDR_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()) @@ -173,6 +252,8 @@ void __init ath79_clocks_init(void) ar913x_clocks_init(); else if (soc_is_ar933x()) ar933x_clocks_init(); + else if (soc_is_ar934x()) + ar934x_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 4e3c55d4b078..bc1c345da009 100644 --- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h +++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h @@ -151,6 +151,41 @@ #define AR933X_PLL_CLOCK_CTRL_AHB_DIV_SHIFT 15 #define AR933X_PLL_CLOCK_CTRL_AHB_DIV_MASK 0x7 +#define AR934X_PLL_CPU_CONFIG_REG 0x00 +#define AR934X_PLL_DDR_CONFIG_REG 0x04 +#define AR934X_PLL_CPU_DDR_CLK_CTRL_REG 0x08 + +#define AR934X_PLL_CPU_CONFIG_NFRAC_SHIFT 0 +#define AR934X_PLL_CPU_CONFIG_NFRAC_MASK 0x3f +#define AR934X_PLL_CPU_CONFIG_NINT_SHIFT 6 +#define AR934X_PLL_CPU_CONFIG_NINT_MASK 0x3f +#define AR934X_PLL_CPU_CONFIG_REFDIV_SHIFT 12 +#define AR934X_PLL_CPU_CONFIG_REFDIV_MASK 0x1f +#define AR934X_PLL_CPU_CONFIG_OUTDIV_SHIFT 19 +#define AR934X_PLL_CPU_CONFIG_OUTDIV_MASK 0x3 + +#define AR934X_PLL_DDR_CONFIG_NFRAC_SHIFT 0 +#define AR934X_PLL_DDR_CONFIG_NFRAC_MASK 0x3ff +#define AR934X_PLL_DDR_CONFIG_NINT_SHIFT 10 +#define AR934X_PLL_DDR_CONFIG_NINT_MASK 0x3f +#define AR934X_PLL_DDR_CONFIG_REFDIV_SHIFT 16 +#define AR934X_PLL_DDR_CONFIG_REFDIV_MASK 0x1f +#define AR934X_PLL_DDR_CONFIG_OUTDIV_SHIFT 23 +#define AR934X_PLL_DDR_CONFIG_OUTDIV_MASK 0x7 + +#define AR934X_PLL_CPU_DDR_CLK_CTRL_CPU_PLL_BYPASS BIT(2) +#define AR934X_PLL_CPU_DDR_CLK_CTRL_DDR_PLL_BYPASS BIT(3) +#define AR934X_PLL_CPU_DDR_CLK_CTRL_AHB_PLL_BYPASS BIT(4) +#define AR934X_PLL_CPU_DDR_CLK_CTRL_CPU_POST_DIV_SHIFT 5 +#define AR934X_PLL_CPU_DDR_CLK_CTRL_CPU_POST_DIV_MASK 0x1f +#define AR934X_PLL_CPU_DDR_CLK_CTRL_DDR_POST_DIV_SHIFT 10 +#define AR934X_PLL_CPU_DDR_CLK_CTRL_DDR_POST_DIV_MASK 0x1f +#define AR934X_PLL_CPU_DDR_CLK_CTRL_AHB_POST_DIV_SHIFT 15 +#define AR934X_PLL_CPU_DDR_CLK_CTRL_AHB_POST_DIV_MASK 0x1f +#define AR934X_PLL_CPU_DDR_CLK_CTRL_CPUCLK_FROM_CPUPLL BIT(20) +#define AR934X_PLL_CPU_DDR_CLK_CTRL_DDRCLK_FROM_DDRPLL BIT(21) +#define AR934X_PLL_CPU_DDR_CLK_CTRL_AHBCLK_FROM_DDRPLL BIT(24) + /* * USB_CONFIG block */ @@ -186,6 +221,8 @@ #define AR933X_RESET_REG_RESET_MODULE 0x1c #define AR933X_RESET_REG_BOOTSTRAP 0xac +#define AR934X_RESET_REG_BOOTSTRAP 0xb0 + #define MISC_INT_ETHSW BIT(12) #define MISC_INT_TIMER4 BIT(10) #define MISC_INT_TIMER3 BIT(9) @@ -242,6 +279,22 @@ #define AR933X_BOOTSTRAP_REF_CLK_40 BIT(0) +#define AR934X_BOOTSTRAP_SW_OPTION8 BIT(23) +#define AR934X_BOOTSTRAP_SW_OPTION7 BIT(22) +#define AR934X_BOOTSTRAP_SW_OPTION6 BIT(21) +#define AR934X_BOOTSTRAP_SW_OPTION5 BIT(20) +#define AR934X_BOOTSTRAP_SW_OPTION4 BIT(19) +#define AR934X_BOOTSTRAP_SW_OPTION3 BIT(18) +#define AR934X_BOOTSTRAP_SW_OPTION2 BIT(17) +#define AR934X_BOOTSTRAP_SW_OPTION1 BIT(16) +#define AR934X_BOOTSTRAP_USB_MODE_DEVICE BIT(7) +#define AR934X_BOOTSTRAP_PCIE_RC BIT(6) +#define AR934X_BOOTSTRAP_EJTAG_MODE BIT(5) +#define AR934X_BOOTSTRAP_REF_CLK_40 BIT(4) +#define AR934X_BOOTSTRAP_BOOT_FROM_SPI BIT(2) +#define AR934X_BOOTSTRAP_SDRAM_DISABLED BIT(1) +#define AR934X_BOOTSTRAP_DDR1 BIT(0) + #define REV_ID_MAJOR_MASK 0xfff0 #define REV_ID_MAJOR_AR71XX 0x00a0 #define REV_ID_MAJOR_AR913X 0x00b0 |