1 /*
2  * Copyright 2014 Freescale Semiconductor, Inc.
3  *
4  * SPDX-License-Identifier:	GPL-2.0+
5  */
6 
7 #include <common.h>
8 #include <asm/io.h>
9 #ifndef CONFIG_ARMV7_NONSEC
10 #error " Deep sleep needs non-secure mode support. "
11 #else
12 #include <asm/secure.h>
13 #endif
14 #include <asm/armv7.h>
15 
16 #if defined(CONFIG_LS102XA)
17 #include <asm/arch/immap_ls102xa.h>
18 #endif
19 
20 #include "sleep.h"
21 #ifdef CONFIG_U_QE
22 #include "../../../drivers/qe/qe.h"
23 #endif
24 
25 DECLARE_GLOBAL_DATA_PTR;
26 
27 void __weak board_mem_sleep_setup(void)
28 {
29 }
30 
31 void __weak board_sleep_prepare(void)
32 {
33 }
34 
35 bool is_warm_boot(void)
36 {
37 	struct ccsr_gur __iomem *gur = (void *)CONFIG_SYS_FSL_GUTS_ADDR;
38 
39 	if (in_be32(&gur->crstsr) & DCFG_CCSR_CRSTSR_WDRFR)
40 		return 1;
41 
42 	return 0;
43 }
44 
45 void fsl_dp_disable_console(void)
46 {
47 	gd->flags |= GD_FLG_SILENT | GD_FLG_DISABLE_CONSOLE;
48 }
49 
50 /*
51  * When wakeup from deep sleep, the first 128 bytes space
52  * will be used to do DDR training which corrupts the data
53  * in there. This function will restore them.
54  */
55 static void dp_ddr_restore(void)
56 {
57 	u64 *src, *dst;
58 	int i;
59 	struct ccsr_scfg __iomem *scfg = (void *)CONFIG_SYS_FSL_SCFG_ADDR;
60 
61 	/* get the address of ddr date from SPARECR3 */
62 	src = (u64 *)in_le32(&scfg->sparecr[2]);
63 	dst = (u64 *)CONFIG_SYS_SDRAM_BASE;
64 
65 	for (i = 0; i < DDR_BUFF_LEN / 8; i++)
66 		*dst++ = *src++;
67 }
68 
69 static void dp_resume_prepare(void)
70 {
71 	dp_ddr_restore();
72 	board_sleep_prepare();
73 	armv7_init_nonsec();
74 #ifdef CONFIG_U_QE
75 	u_qe_resume();
76 #endif
77 }
78 
79 int fsl_dp_resume(void)
80 {
81 	u32 start_addr;
82 	void (*kernel_resume)(void);
83 	struct ccsr_scfg __iomem *scfg = (void *)CONFIG_SYS_FSL_SCFG_ADDR;
84 
85 	if (!is_warm_boot())
86 		return 0;
87 
88 	dp_resume_prepare();
89 
90 	/* Get the entry address and jump to kernel */
91 	start_addr = in_le32(&scfg->sparecr[1]);
92 	debug("Entry address is 0x%08x\n", start_addr);
93 	kernel_resume = (void (*)(void))start_addr;
94 	secure_ram_addr(_do_nonsec_entry)(kernel_resume, 0, 0, 0);
95 
96 	return 0;
97 }
98