1 /* 2 * Copyright 2014 Freescale Semiconductor, Inc. 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <asm/immap_85xx.h> 9 #include "sleep.h" 10 #ifdef CONFIG_U_QE 11 #include <fsl_qe.h> 12 #endif 13 14 DECLARE_GLOBAL_DATA_PTR; 15 16 void __weak board_mem_sleep_setup(void) 17 { 18 } 19 20 void __weak board_sleep_prepare(void) 21 { 22 } 23 24 bool is_warm_boot(void) 25 { 26 struct ccsr_gur __iomem *gur = (void *)CONFIG_SYS_MPC85xx_GUTS_ADDR; 27 28 if (in_be32(&gur->scrtsr[0]) & DCFG_CCSR_CRSTSR_WDRFR) 29 return 1; 30 31 return 0; 32 } 33 34 void fsl_dp_disable_console(void) 35 { 36 gd->flags |= GD_FLG_SILENT | GD_FLG_DISABLE_CONSOLE; 37 } 38 39 /* 40 * When wakeup from deep sleep, the first 128 bytes space 41 * will be used to do DDR training which corrupts the data 42 * in there. This function will restore them. 43 */ 44 static void dp_ddr_restore(void) 45 { 46 u64 *src, *dst; 47 int i; 48 struct ccsr_scfg __iomem *scfg = (void *)CONFIG_SYS_MPC85xx_SCFG; 49 50 /* get the address of ddr date from SPARECR3 */ 51 src = (u64 *)(in_be32(&scfg->sparecr[2]) + DDR_BUFF_LEN - 8); 52 dst = (u64 *)(CONFIG_SYS_SDRAM_BASE + DDR_BUFF_LEN - 8); 53 54 for (i = 0; i < DDR_BUFF_LEN / 8; i++) 55 *dst-- = *src--; 56 57 flush_dcache(); 58 } 59 60 static void dp_resume_prepare(void) 61 { 62 dp_ddr_restore(); 63 64 board_sleep_prepare(); 65 66 l2cache_init(); 67 #if defined(CONFIG_RAMBOOT_PBL) 68 disable_cpc_sram(); 69 #endif 70 enable_cpc(); 71 72 #ifdef CONFIG_U_QE 73 u_qe_resume(); 74 #endif 75 76 } 77 78 int fsl_dp_resume(void) 79 { 80 u32 start_addr; 81 void (*kernel_resume)(void); 82 struct ccsr_scfg __iomem *scfg = (void *)CONFIG_SYS_MPC85xx_SCFG; 83 84 if (!is_warm_boot()) 85 return 0; 86 87 dp_resume_prepare(); 88 89 /* Get the entry address and jump to kernel */ 90 start_addr = in_be32(&scfg->sparecr[1]); 91 debug("Entry address is 0x%08x\n", start_addr); 92 kernel_resume = (void (*)(void))start_addr; 93 kernel_resume(); 94 95 return 0; 96 } 97