--- /dev/null
+From 783addfa256e79892f889e95ec5cda34f4e91eb7 Mon Sep 17 00:00:00 2001
+From: Gabor Juhos <juhosg@openwrt.org>
+Date: Fri, 9 Dec 2011 20:36:32 +0100
+Subject: [PATCH 24/35] 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>
+---
+ 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
projects / openwrt.git / blobdiff