1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2008 Stefan Roese <sr@denx.de>, DENX Software Engineering
10 static u32 ebi_read(u32 addr)
14 reg_write(EBI_CPU_IO_ACCS(EBI_BASE), EXT_DEVICE_CHANNEL_2 | addr);
17 return reg_read(EBI_IO_ACCS_DATA(EBI_BASE));
20 static int ebi_write_u16(u32 addr, u32 data, int fetchIO)
22 u32 val = (data << 16);
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);
35 while (!(reg_read(EBI_SIG_LEVEL(EBI_BASE)) & EXT_CPU_IORDY_SL)) {
36 if (counter++ > 0xFFFFFF)
44 static u16 ebi_read_u16(u32 addr)
46 return ((ebi_read(addr) >> 16) & 0xFFFF);
49 static u8 ebi_read_u8(u32 addr)
51 u32 val = ebi_read(addr) >> 16;
56 return (val >> 8) & 0xff;
60 * EBI initialization for NOR FLASH access
62 int ebi_init_nor_flash(void)
64 reg_write(EBI_DEV1_CONFIG1(EBI_BASE), 0x83000);
66 reg_write(EBI_DEV2_CONFIG1(EBI_BASE), 0x400002);
67 reg_write(EBI_DEV2_CONFIG2(EBI_BASE), 0x50);
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);
79 * Accessor functions replacing the "weak" functions in
80 * drivers/mtd/cfi_flash.c
82 void flash_write8(u8 value, void *addr)
84 ebi_write_u16((u32)addr, value, 0);
87 void flash_write16(u16 value, void *addr)
89 ebi_write_u16((u32)addr, value, 0);
92 u8 flash_read8(void *addr)
94 return ebi_read_u8((u32)addr);
97 u16 flash_read16(void *addr)
99 return ebi_read_u16((u32)addr);
102 u32 flash_read32(void *addr)
104 return ((u32)ebi_read_u16((u32)addr) << 16) |
105 ebi_read_u16((u32)addr + 2);
108 void *board_flash_read_memcpy(void *dest, const void *src, size_t count)
110 u16 *tmp = (u16 *)dest, *s = (u16 *)src;
113 for (i = 0; i < count; i += 2)
114 *tmp++ = flash_read16(s++);