2 * (C) Copyright 2008 Stefan Roese <sr@denx.de>, DENX Software Engineering
4 * SPDX-License-Identifier: GPL-2.0+
11 static u32 ebi_read(u32 addr)
15 reg_write(EBI_CPU_IO_ACCS(EBI_BASE), EXT_DEVICE_CHANNEL_2 | addr);
18 return reg_read(EBI_IO_ACCS_DATA(EBI_BASE));
21 static int ebi_write_u16(u32 addr, u32 data, int fetchIO)
23 u32 val = (data << 16);
29 reg_write(EBI_IO_ACCS_DATA(EBI_BASE), val);
30 reg_write(EBI_CPU_IO_ACCS(EBI_BASE),
31 EXT_DEVICE_CHANNEL_2 | EBI_CPU_WRITE | addr);
36 while (!(reg_read(EBI_SIG_LEVEL(EBI_BASE)) & EXT_CPU_IORDY_SL)) {
37 if (counter++ > 0xFFFFFF)
45 static u16 ebi_read_u16(u32 addr)
47 return ((ebi_read(addr) >> 16) & 0xFFFF);
50 static u8 ebi_read_u8(u32 addr)
52 u32 val = ebi_read(addr) >> 16;
57 return (val >> 8) & 0xff;
61 * EBI initialization for NOR FLASH access
63 int ebi_init_nor_flash(void)
65 reg_write(EBI_DEV1_CONFIG1(EBI_BASE), 0x83000);
67 reg_write(EBI_DEV2_CONFIG1(EBI_BASE), 0x400002);
68 reg_write(EBI_DEV2_CONFIG2(EBI_BASE), 0x50);
70 reg_write(EBI_DEV2_TIM1_RD1(EBI_BASE), 0x409113);
71 reg_write(EBI_DEV2_TIM1_RD2(EBI_BASE), 0xFF01000);
72 reg_write(EBI_DEV2_TIM1_WR1(EBI_BASE), 0x04003113);
73 reg_write(EBI_DEV2_TIM1_WR2(EBI_BASE), 0x3FC12011);
74 reg_write(EBI_DEV2_TIM_EXT(EBI_BASE), 0xFFF00000);
80 * Accessor functions replacing the "weak" functions in
81 * drivers/mtd/cfi_flash.c
83 void flash_write8(u8 value, void *addr)
85 ebi_write_u16((u32)addr, value, 0);
88 void flash_write16(u16 value, void *addr)
90 ebi_write_u16((u32)addr, value, 0);
93 u8 flash_read8(void *addr)
95 return ebi_read_u8((u32)addr);
98 u16 flash_read16(void *addr)
100 return ebi_read_u16((u32)addr);
103 u32 flash_read32(void *addr)
105 return ((u32)ebi_read_u16((u32)addr) << 16) |
106 ebi_read_u16((u32)addr + 2);
109 void *board_flash_read_memcpy(void *dest, const void *src, size_t count)
111 u16 *tmp = (u16 *)dest, *s = (u16 *)src;
114 for (i = 0; i < count; i += 2)
115 *tmp++ = flash_read16(s++);