1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * (C) Copyright 2008 Stefan Roese <sr@denx.de>, DENX Software Engineering
4 */
5
6 #include <common.h>
7 #include <asm/io.h>
8 #include "vct.h"
9
ebi_read(u32 addr)10 static u32 ebi_read(u32 addr)
11 {
12 addr &= ~0xFC000000;
13
14 reg_write(EBI_CPU_IO_ACCS(EBI_BASE), EXT_DEVICE_CHANNEL_2 | addr);
15 ebi_wait();
16
17 return reg_read(EBI_IO_ACCS_DATA(EBI_BASE));
18 }
19
ebi_write_u16(u32 addr,u32 data,int fetchIO)20 static int ebi_write_u16(u32 addr, u32 data, int fetchIO)
21 {
22 u32 val = (data << 16);
23
24 addr &= ~0xFC000000;
25
26 ebi_wait();
27
28 reg_write(EBI_IO_ACCS_DATA(EBI_BASE), val);
29 reg_write(EBI_CPU_IO_ACCS(EBI_BASE),
30 EXT_DEVICE_CHANNEL_2 | EBI_CPU_WRITE | addr);
31 ebi_wait();
32
33 if (fetchIO) {
34 u32 counter = 0;
35 while (!(reg_read(EBI_SIG_LEVEL(EBI_BASE)) & EXT_CPU_IORDY_SL)) {
36 if (counter++ > 0xFFFFFF)
37 return 1;
38 }
39 }
40
41 return 0;
42 }
43
ebi_read_u16(u32 addr)44 static u16 ebi_read_u16(u32 addr)
45 {
46 return ((ebi_read(addr) >> 16) & 0xFFFF);
47 }
48
ebi_read_u8(u32 addr)49 static u8 ebi_read_u8(u32 addr)
50 {
51 u32 val = ebi_read(addr) >> 16;
52
53 if (addr & 0x1)
54 return val & 0xff;
55 else
56 return (val >> 8) & 0xff;
57 }
58
59 /*
60 * EBI initialization for NOR FLASH access
61 */
ebi_init_nor_flash(void)62 int ebi_init_nor_flash(void)
63 {
64 reg_write(EBI_DEV1_CONFIG1(EBI_BASE), 0x83000);
65
66 reg_write(EBI_DEV2_CONFIG1(EBI_BASE), 0x400002);
67 reg_write(EBI_DEV2_CONFIG2(EBI_BASE), 0x50);
68
69 reg_write(EBI_DEV2_TIM1_RD1(EBI_BASE), 0x409113);
70 reg_write(EBI_DEV2_TIM1_RD2(EBI_BASE), 0xFF01000);
71 reg_write(EBI_DEV2_TIM1_WR1(EBI_BASE), 0x04003113);
72 reg_write(EBI_DEV2_TIM1_WR2(EBI_BASE), 0x3FC12011);
73 reg_write(EBI_DEV2_TIM_EXT(EBI_BASE), 0xFFF00000);
74
75 return 0;
76 }
77
78 /*
79 * Accessor functions replacing the "weak" functions in
80 * drivers/mtd/cfi_flash.c
81 */
flash_write8(u8 value,void * addr)82 void flash_write8(u8 value, void *addr)
83 {
84 ebi_write_u16((u32)addr, value, 0);
85 }
86
flash_write16(u16 value,void * addr)87 void flash_write16(u16 value, void *addr)
88 {
89 ebi_write_u16((u32)addr, value, 0);
90 }
91
flash_read8(void * addr)92 u8 flash_read8(void *addr)
93 {
94 return ebi_read_u8((u32)addr);
95 }
96
flash_read16(void * addr)97 u16 flash_read16(void *addr)
98 {
99 return ebi_read_u16((u32)addr);
100 }
101
flash_read32(void * addr)102 u32 flash_read32(void *addr)
103 {
104 return ((u32)ebi_read_u16((u32)addr) << 16) |
105 ebi_read_u16((u32)addr + 2);
106 }
107
board_flash_read_memcpy(void * dest,const void * src,size_t count)108 void *board_flash_read_memcpy(void *dest, const void *src, size_t count)
109 {
110 u16 *tmp = (u16 *)dest, *s = (u16 *)src;
111 int i;
112
113 for (i = 0; i < count; i += 2)
114 *tmp++ = flash_read16(s++);
115
116 return dest;
117 }
118