diff options
Diffstat (limited to 'target/linux/ar71xx/patches-3.3/122-MIPS-ath79-add-clock-initialization-code-for-AR934X.patch')
| -rw-r--r-- | target/linux/ar71xx/patches-3.3/122-MIPS-ath79-add-clock-initialization-code-for-AR934X.patch | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/target/linux/ar71xx/patches-3.3/122-MIPS-ath79-add-clock-initialization-code-for-AR934X.patch b/target/linux/ar71xx/patches-3.3/122-MIPS-ath79-add-clock-initialization-code-for-AR934X.patch new file mode 100644 index 000000000..39e161cc2 --- /dev/null +++ b/target/linux/ar71xx/patches-3.3/122-MIPS-ath79-add-clock-initialization-code-for-AR934X.patch @@ -0,0 +1,198 @@ +From e9706fc0a97feb7992a98806b69a1fc1fcb910c7 Mon Sep 17 00:00:00 2001 +From: Gabor Juhos <juhosg@openwrt.org> +Date: Wed, 14 Mar 2012 10:45:22 +0100 +Subject: [PATCH 27/47] MIPS: ath79: add clock initialization code for AR934X + +Signed-off-by: Gabor Juhos <juhosg@openwrt.org> +Acked-by: Luis R. Rodriguez <mcgrof@qca.qualcomm.com> +Cc: linux-mips@linux-mips.org +Cc: mcgrof@infradead.org +Patchwork: https://patchwork.linux-mips.org/patch/3507/ +Signed-off-by: Ralf Baechle <ralf@linux-mips.org> +--- + arch/mips/ath79/clock.c | 81 ++++++++++++++++++++++++ + arch/mips/include/asm/mach-ath79/ar71xx_regs.h | 53 +++++++++++++++ + 2 files changed, 134 insertions(+), 0 deletions(-) + +--- 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(vo + 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(); + +--- 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 |