/* * arch/arm/mach-tegra/ahb.c * * Copyright (C) 2011 Google, Inc. * * Author: * Jay Cheng * James Wylder * Benoit Goby * Colin Cross * * This software is licensed under the terms of the GNU General Public * License version 2, as published by the Free Software Foundation, and * may be copied, distributed, and modified under those terms. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * */ #include #include #include #include #include #define AHB_ARBITRATION_DISABLE 0x00 #define AHB_ARBITRATION_PRIORITY_CTRL 0x04 #define AHB_PRIORITY_WEIGHT(x) (((x) & 0x7) << 29) #define PRIORITY_SELECT_USB BIT(6) #define PRIORITY_SELECT_USB2 BIT(18) #define PRIORITY_SELECT_USB3 BIT(17) #define AHB_GIZMO_AHB_MEM 0x0c #define ENB_FAST_REARBITRATE BIT(2) #define DONT_SPLIT_AHB_WR BIT(7) #define AHB_GIZMO_APB_DMA 0x10 #define AHB_GIZMO_IDE 0x18 #define AHB_GIZMO_USB 0x1c #define AHB_GIZMO_AHB_XBAR_BRIDGE 0x20 #define AHB_GIZMO_CPU_AHB_BRIDGE 0x24 #define AHB_GIZMO_COP_AHB_BRIDGE 0x28 #define AHB_GIZMO_XBAR_APB_CTLR 0x2c #define AHB_GIZMO_VCP_AHB_BRIDGE 0x30 #define AHB_GIZMO_NAND 0x3c #define AHB_GIZMO_SDMMC4 0x44 #define AHB_GIZMO_XIO 0x48 #define AHB_GIZMO_BSEV 0x60 #define AHB_GIZMO_BSEA 0x70 #define AHB_GIZMO_NOR 0x74 #define AHB_GIZMO_USB2 0x78 #define AHB_GIZMO_USB3 0x7c #define IMMEDIATE BIT(18) #define AHB_GIZMO_SDMMC1 0x80 #define AHB_GIZMO_SDMMC2 0x84 #define AHB_GIZMO_SDMMC3 0x88 #define AHB_MEM_PREFETCH_CFG_X 0xd8 #define AHB_ARBITRATION_XBAR_CTRL 0xdc #define AHB_MEM_PREFETCH_CFG3 0xe0 #define AHB_MEM_PREFETCH_CFG4 0xe4 #define AHB_MEM_PREFETCH_CFG1 0xec #define AHB_MEM_PREFETCH_CFG2 0xf0 #define PREFETCH_ENB BIT(31) #define MST_ID(x) (((x) & 0x1f) << 26) #define AHBDMA_MST_ID MST_ID(5) #define USB_MST_ID MST_ID(6) #define USB2_MST_ID MST_ID(18) #define USB3_MST_ID MST_ID(17) #define ADDR_BNDRY(x) (((x) & 0xf) << 21) #define INACTIVITY_TIMEOUT(x) (((x) & 0xffff) << 0) #define AHB_ARBITRATION_AHB_MEM_WRQUE_MST_ID 0xf8 static inline unsigned long gizmo_readl(unsigned long offset) { return readl(IO_TO_VIRT(TEGRA_AHB_GIZMO_BASE + offset)); } static inline void gizmo_writel(unsigned long value, unsigned long offset) { writel(value, IO_TO_VIRT(TEGRA_AHB_GIZMO_BASE + offset)); } static u32 ahb_gizmo[29]; #ifdef CONFIG_PM int tegra_ahbgizmo_suspend(void) { ahb_gizmo[0] = gizmo_readl(AHB_ARBITRATION_DISABLE); ahb_gizmo[1] = gizmo_readl(AHB_ARBITRATION_PRIORITY_CTRL); ahb_gizmo[2] = gizmo_readl(AHB_GIZMO_AHB_MEM); ahb_gizmo[3] = gizmo_readl(AHB_GIZMO_APB_DMA); ahb_gizmo[4] = gizmo_readl(AHB_GIZMO_IDE); ahb_gizmo[5] = gizmo_readl(AHB_GIZMO_USB); ahb_gizmo[6] = gizmo_readl(AHB_GIZMO_AHB_XBAR_BRIDGE); ahb_gizmo[7] = gizmo_readl(AHB_GIZMO_CPU_AHB_BRIDGE); ahb_gizmo[8] = gizmo_readl(AHB_GIZMO_COP_AHB_BRIDGE); ahb_gizmo[9] = gizmo_readl(AHB_GIZMO_XBAR_APB_CTLR); ahb_gizmo[10] = gizmo_readl(AHB_GIZMO_VCP_AHB_BRIDGE); ahb_gizmo[11] = gizmo_readl(AHB_GIZMO_NAND); ahb_gizmo[12] = gizmo_readl(AHB_GIZMO_SDMMC4); ahb_gizmo[13] = gizmo_readl(AHB_GIZMO_XIO); ahb_gizmo[14] = gizmo_readl(AHB_GIZMO_BSEV); ahb_gizmo[15] = gizmo_readl(AHB_GIZMO_BSEA); ahb_gizmo[16] = gizmo_readl(AHB_GIZMO_NOR); ahb_gizmo[17] = gizmo_readl(AHB_GIZMO_USB2); ahb_gizmo[18] = gizmo_readl(AHB_GIZMO_USB3); ahb_gizmo[19] = gizmo_readl(AHB_GIZMO_SDMMC1); ahb_gizmo[20] = gizmo_readl(AHB_GIZMO_SDMMC2); ahb_gizmo[21] = gizmo_readl(AHB_GIZMO_SDMMC3); ahb_gizmo[22] = gizmo_readl(AHB_MEM_PREFETCH_CFG_X); ahb_gizmo[23] = gizmo_readl(AHB_ARBITRATION_XBAR_CTRL); ahb_gizmo[24] = gizmo_readl(AHB_MEM_PREFETCH_CFG3); ahb_gizmo[25] = gizmo_readl(AHB_MEM_PREFETCH_CFG4); ahb_gizmo[26] = gizmo_readl(AHB_MEM_PREFETCH_CFG1); ahb_gizmo[27] = gizmo_readl(AHB_MEM_PREFETCH_CFG2); ahb_gizmo[28] = gizmo_readl(AHB_ARBITRATION_AHB_MEM_WRQUE_MST_ID); return 0; } void tegra_ahbgizmo_resume(void) { gizmo_writel(ahb_gizmo[0], AHB_ARBITRATION_DISABLE); gizmo_writel(ahb_gizmo[1], AHB_ARBITRATION_PRIORITY_CTRL); gizmo_writel(ahb_gizmo[2], AHB_GIZMO_AHB_MEM); gizmo_writel(ahb_gizmo[3], AHB_GIZMO_APB_DMA); gizmo_writel(ahb_gizmo[4], AHB_GIZMO_IDE); gizmo_writel(ahb_gizmo[5], AHB_GIZMO_USB); gizmo_writel(ahb_gizmo[6], AHB_GIZMO_AHB_XBAR_BRIDGE); gizmo_writel(ahb_gizmo[7], AHB_GIZMO_CPU_AHB_BRIDGE); gizmo_writel(ahb_gizmo[8], AHB_GIZMO_COP_AHB_BRIDGE); gizmo_writel(ahb_gizmo[9], AHB_GIZMO_XBAR_APB_CTLR); gizmo_writel(ahb_gizmo[10], AHB_GIZMO_VCP_AHB_BRIDGE); gizmo_writel(ahb_gizmo[11], AHB_GIZMO_NAND); gizmo_writel(ahb_gizmo[12], AHB_GIZMO_SDMMC4); gizmo_writel(ahb_gizmo[13], AHB_GIZMO_XIO); gizmo_writel(ahb_gizmo[14], AHB_GIZMO_BSEV); gizmo_writel(ahb_gizmo[15], AHB_GIZMO_BSEA); gizmo_writel(ahb_gizmo[16], AHB_GIZMO_NOR); gizmo_writel(ahb_gizmo[17], AHB_GIZMO_USB2); gizmo_writel(ahb_gizmo[18], AHB_GIZMO_USB3); gizmo_writel(ahb_gizmo[19], AHB_GIZMO_SDMMC1); gizmo_writel(ahb_gizmo[20], AHB_GIZMO_SDMMC2); gizmo_writel(ahb_gizmo[21], AHB_GIZMO_SDMMC3); gizmo_writel(ahb_gizmo[22], AHB_MEM_PREFETCH_CFG_X); gizmo_writel(ahb_gizmo[23], AHB_ARBITRATION_XBAR_CTRL); gizmo_writel(ahb_gizmo[24], AHB_MEM_PREFETCH_CFG3); gizmo_writel(ahb_gizmo[25], AHB_MEM_PREFETCH_CFG4); gizmo_writel(ahb_gizmo[26], AHB_MEM_PREFETCH_CFG1); gizmo_writel(ahb_gizmo[27], AHB_MEM_PREFETCH_CFG2); gizmo_writel(ahb_gizmo[28], AHB_ARBITRATION_AHB_MEM_WRQUE_MST_ID); } #else #define tegra_ahbgizmo_suspend NULL #define tegra_ahbgizmo_resume NULL #endif static struct syscore_ops tegra_ahbgizmo_syscore_ops = { .suspend = tegra_ahbgizmo_suspend, .resume = tegra_ahbgizmo_resume, }; static int __init tegra_init_ahb_gizmo_settings(void) { unsigned long val; val = gizmo_readl(AHB_GIZMO_AHB_MEM); val |= ENB_FAST_REARBITRATE | IMMEDIATE | DONT_SPLIT_AHB_WR; gizmo_writel(val, AHB_GIZMO_AHB_MEM); val = gizmo_readl(AHB_GIZMO_USB); val |= IMMEDIATE; gizmo_writel(val, AHB_GIZMO_USB); val = gizmo_readl(AHB_GIZMO_USB2); val |= IMMEDIATE; gizmo_writel(val, AHB_GIZMO_USB2); val = gizmo_readl(AHB_GIZMO_USB3); val |= IMMEDIATE; gizmo_writel(val, AHB_GIZMO_USB3); val = gizmo_readl(AHB_ARBITRATION_PRIORITY_CTRL); val |= PRIORITY_SELECT_USB | PRIORITY_SELECT_USB2 | PRIORITY_SELECT_USB3 | AHB_PRIORITY_WEIGHT(7); gizmo_writel(val, AHB_ARBITRATION_PRIORITY_CTRL); val = gizmo_readl(AHB_MEM_PREFETCH_CFG1); val &= ~MST_ID(~0); val |= PREFETCH_ENB | AHBDMA_MST_ID | ADDR_BNDRY(0xc) | INACTIVITY_TIMEOUT(0x1000); gizmo_writel(val, AHB_MEM_PREFETCH_CFG1); val = gizmo_readl(AHB_MEM_PREFETCH_CFG2); val &= ~MST_ID(~0); val |= PREFETCH_ENB | USB_MST_ID | ADDR_BNDRY(0xc) | INACTIVITY_TIMEOUT(0x1000); gizmo_writel(val, AHB_MEM_PREFETCH_CFG2); val = gizmo_readl(AHB_MEM_PREFETCH_CFG3); val &= ~MST_ID(~0); val |= PREFETCH_ENB | USB3_MST_ID | ADDR_BNDRY(0xc) | INACTIVITY_TIMEOUT(0x1000); gizmo_writel(val, AHB_MEM_PREFETCH_CFG3); val = gizmo_readl(AHB_MEM_PREFETCH_CFG4); val &= ~MST_ID(~0); val |= PREFETCH_ENB | USB2_MST_ID | ADDR_BNDRY(0xc) | INACTIVITY_TIMEOUT(0x1000); gizmo_writel(val, AHB_MEM_PREFETCH_CFG4); register_syscore_ops(&tegra_ahbgizmo_syscore_ops); return 0; } postcore_initcall(tegra_init_ahb_gizmo_settings);