Merge branch 'master' of git://www.denx.de/git/u-boot-socfpga
[oweals/u-boot.git] / board / freescale / common / mpc85xx_sleep.c
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 "../../../drivers/qe/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         volatile 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]);
52         dst = (u64 *)CONFIG_SYS_SDRAM_BASE;
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 }