1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 1999,2000 Arm Limited 4 * Copyright (C) 2000 Deep Blue Solutions Ltd 5 * Copyright (C) 2002 Shane Nay (shane@minirl.com) 6 * Copyright 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved. 7 * - add MX31 specific definitions 8 */ 9 10 #include <linux/mm.h> 11 #include <linux/init.h> 12 #include <linux/err.h> 13 #include <linux/io.h> 14 #include <linux/of_address.h> 15 16 #include <asm/system_misc.h> 17 #include <asm/hardware/cache-l2x0.h> 18 #include <asm/mach/map.h> 19 20 #include "common.h" 21 #include "crmregs-imx3.h" 22 #include "hardware.h" 23 24 void __iomem *mx3_ccm_base; 25 26 static void imx3_idle(void) 27 { 28 unsigned long reg = 0; 29 30 __asm__ __volatile__( 31 /* disable I and D cache */ 32 "mrc p15, 0, %0, c1, c0, 0\n" 33 "bic %0, %0, #0x00001000\n" 34 "bic %0, %0, #0x00000004\n" 35 "mcr p15, 0, %0, c1, c0, 0\n" 36 /* invalidate I cache */ 37 "mov %0, #0\n" 38 "mcr p15, 0, %0, c7, c5, 0\n" 39 /* clear and invalidate D cache */ 40 "mov %0, #0\n" 41 "mcr p15, 0, %0, c7, c14, 0\n" 42 /* WFI */ 43 "mov %0, #0\n" 44 "mcr p15, 0, %0, c7, c0, 4\n" 45 "nop\n" "nop\n" "nop\n" "nop\n" 46 "nop\n" "nop\n" "nop\n" 47 /* enable I and D cache */ 48 "mrc p15, 0, %0, c1, c0, 0\n" 49 "orr %0, %0, #0x00001000\n" 50 "orr %0, %0, #0x00000004\n" 51 "mcr p15, 0, %0, c1, c0, 0\n" 52 : "=r" (reg)); 53 } 54 55 static void __iomem *imx3_ioremap_caller(phys_addr_t phys_addr, size_t size, 56 unsigned int mtype, void *caller) 57 { 58 if (mtype == MT_DEVICE) { 59 /* 60 * Access all peripherals below 0x80000000 as nonshared device 61 * on mx3, but leave l2cc alone. Otherwise cache corruptions 62 * can occur. 63 */ 64 if (phys_addr < 0x80000000 && 65 !addr_in_module(phys_addr, MX3x_L2CC)) 66 mtype = MT_DEVICE_NONSHARED; 67 } 68 69 return __arm_ioremap_caller(phys_addr, size, mtype, caller); 70 } 71 72 #ifdef CONFIG_SOC_IMX31 73 static struct map_desc mx31_io_desc[] __initdata = { 74 imx_map_entry(MX31, X_MEMC, MT_DEVICE), 75 imx_map_entry(MX31, AVIC, MT_DEVICE_NONSHARED), 76 imx_map_entry(MX31, AIPS1, MT_DEVICE_NONSHARED), 77 imx_map_entry(MX31, AIPS2, MT_DEVICE_NONSHARED), 78 imx_map_entry(MX31, SPBA0, MT_DEVICE_NONSHARED), 79 }; 80 81 /* 82 * This function initializes the memory map. It is called during the 83 * system startup to create static physical to virtual memory mappings 84 * for the IO modules. 85 */ 86 void __init mx31_map_io(void) 87 { 88 iotable_init(mx31_io_desc, ARRAY_SIZE(mx31_io_desc)); 89 } 90 91 static void imx31_idle(void) 92 { 93 int reg = imx_readl(mx3_ccm_base + MXC_CCM_CCMR); 94 reg &= ~MXC_CCM_CCMR_LPM_MASK; 95 imx_writel(reg, mx3_ccm_base + MXC_CCM_CCMR); 96 97 imx3_idle(); 98 } 99 100 void __init imx31_init_early(void) 101 { 102 struct device_node *np; 103 104 mxc_set_cpu_type(MXC_CPU_MX31); 105 arch_ioremap_caller = imx3_ioremap_caller; 106 arm_pm_idle = imx31_idle; 107 np = of_find_compatible_node(NULL, NULL, "fsl,imx31-ccm"); 108 mx3_ccm_base = of_iomap(np, 0); 109 BUG_ON(!mx3_ccm_base); 110 } 111 #endif /* ifdef CONFIG_SOC_IMX31 */ 112 113 #ifdef CONFIG_SOC_IMX35 114 static struct map_desc mx35_io_desc[] __initdata = { 115 imx_map_entry(MX35, X_MEMC, MT_DEVICE), 116 imx_map_entry(MX35, AVIC, MT_DEVICE_NONSHARED), 117 imx_map_entry(MX35, AIPS1, MT_DEVICE_NONSHARED), 118 imx_map_entry(MX35, AIPS2, MT_DEVICE_NONSHARED), 119 imx_map_entry(MX35, SPBA0, MT_DEVICE_NONSHARED), 120 }; 121 122 void __init mx35_map_io(void) 123 { 124 iotable_init(mx35_io_desc, ARRAY_SIZE(mx35_io_desc)); 125 } 126 127 static void imx35_idle(void) 128 { 129 int reg = imx_readl(mx3_ccm_base + MXC_CCM_CCMR); 130 reg &= ~MXC_CCM_CCMR_LPM_MASK; 131 reg |= MXC_CCM_CCMR_LPM_WAIT_MX35; 132 imx_writel(reg, mx3_ccm_base + MXC_CCM_CCMR); 133 134 imx3_idle(); 135 } 136 137 void __init imx35_init_early(void) 138 { 139 struct device_node *np; 140 141 mxc_set_cpu_type(MXC_CPU_MX35); 142 arm_pm_idle = imx35_idle; 143 arch_ioremap_caller = imx3_ioremap_caller; 144 np = of_find_compatible_node(NULL, NULL, "fsl,imx35-ccm"); 145 mx3_ccm_base = of_iomap(np, 0); 146 BUG_ON(!mx3_ccm_base); 147 } 148 #endif /* ifdef CONFIG_SOC_IMX35 */ 149