diff options
Diffstat (limited to 'board/micronas/vct/ebi_onenand.c')
| -rw-r--r-- | board/micronas/vct/ebi_onenand.c | 185 |
1 files changed, 0 insertions, 185 deletions
diff --git a/board/micronas/vct/ebi_onenand.c b/board/micronas/vct/ebi_onenand.c deleted file mode 100644 index 862ce2682e..0000000000 --- a/board/micronas/vct/ebi_onenand.c +++ /dev/null @@ -1,185 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * (C) Copyright 2008 Stefan Roese <sr@denx.de>, DENX Software Engineering - */ - -#include <common.h> -#include <asm/io.h> -#include <linux/mtd/mtd.h> -#include <linux/mtd/onenand.h> -#include "vct.h" - -#define BURST_SIZE_WORDS 4 - -static u16 ebi_nand_read_word(void __iomem *addr) -{ - reg_write(EBI_CPU_IO_ACCS(EBI_BASE), (EXT_DEVICE_CHANNEL_2 | (u32)addr)); - ebi_wait(); - - return reg_read(EBI_IO_ACCS_DATA(EBI_BASE)) >> 16; -} - -static void ebi_nand_write_word(u16 data, void __iomem * addr) -{ - ebi_wait(); - reg_write(EBI_IO_ACCS_DATA(EBI_BASE), (data << 16)); - reg_write(EBI_CPU_IO_ACCS(EBI_BASE), - EXT_DEVICE_CHANNEL_2 | EBI_CPU_WRITE | (u32)addr); - ebi_wait(); -} - -/* - * EBI initialization for OneNAND FLASH access - */ -int ebi_init_onenand(void) -{ - reg_write(EBI_DEV1_CONFIG1(EBI_BASE), 0x83000); - - reg_write(EBI_DEV2_CONFIG1(EBI_BASE), 0x00403002); - reg_write(EBI_DEV2_CONFIG2(EBI_BASE), 0x50); - - reg_write(EBI_DEV3_CONFIG1(EBI_BASE), 0x00403002); - reg_write(EBI_DEV3_CONFIG2(EBI_BASE), 0x0); /* byte/word ordering */ - - reg_write(EBI_DEV2_TIM1_RD1(EBI_BASE), 0x00504000); - reg_write(EBI_DEV2_TIM1_RD2(EBI_BASE), 0x00001000); - reg_write(EBI_DEV2_TIM1_WR1(EBI_BASE), 0x12002223); - reg_write(EBI_DEV2_TIM1_WR2(EBI_BASE), 0x3FC02220); - reg_write(EBI_DEV3_TIM1_RD1(EBI_BASE), 0x00504000); - reg_write(EBI_DEV3_TIM1_RD2(EBI_BASE), 0x00001000); - reg_write(EBI_DEV3_TIM1_WR1(EBI_BASE), 0x05001000); - reg_write(EBI_DEV3_TIM1_WR2(EBI_BASE), 0x00010200); - - reg_write(EBI_DEV2_TIM_EXT(EBI_BASE), 0xFFF00000); - reg_write(EBI_DEV2_EXT_ACC(EBI_BASE), 0x0FFFFFFF); - - reg_write(EBI_DEV3_TIM_EXT(EBI_BASE), 0xFFF00000); - reg_write(EBI_DEV3_EXT_ACC(EBI_BASE), 0x0FFFFFFF); - - /* prepare DMA configuration for EBI */ - reg_write(EBI_DEV3_FIFO_CONFIG(EBI_BASE), 0x0101ff00); - - /* READ only no byte order change, TAG 1 used */ - reg_write(EBI_DEV3_DMA_CONFIG2(EBI_BASE), 0x00000004); - - reg_write(EBI_TAG1_SYS_ID(EBI_BASE), 0x0); /* SCC DMA channel 0 */ - reg_write(EBI_TAG2_SYS_ID(EBI_BASE), 0x1); - reg_write(EBI_TAG3_SYS_ID(EBI_BASE), 0x2); - reg_write(EBI_TAG4_SYS_ID(EBI_BASE), 0x3); - - return 0; -} - -static void *memcpy_16_from_onenand(void *dst, const void *src, unsigned int len) -{ - void *ret = dst; - u16 *d = dst; - u16 *s = (u16 *)src; - - len >>= 1; - while (len-- > 0) - *d++ = ebi_nand_read_word(s++); - - return ret; -} - -static void *memcpy_32_from_onenand(void *dst, const void *src, unsigned int len) -{ - void *ret = dst; - u32 *d = (u32 *)dst; - u32 s = (u32)src; - u32 bytes_per_block = BURST_SIZE_WORDS * sizeof(int); - u32 n_blocks = len / bytes_per_block; - u32 block = 0; - u32 burst_word; - - for (block = 0; block < n_blocks; block++) { - /* Trigger read channel 3 */ - reg_write(EBI_CPU_IO_ACCS(EBI_BASE), - (EXT_DEVICE_CHANNEL_3 | (s + (block * bytes_per_block)))); - /* Poll status to see whether read has finished */ - ebi_wait(); - - /* Squirrel the data away in a safe place */ - for (burst_word = 0; burst_word < BURST_SIZE_WORDS; burst_word++) - *d++ = reg_read(EBI_IO_ACCS_DATA(EBI_BASE)); - } - - return ret; -} - -static void *memcpy_16_to_onenand(void *dst, const void *src, unsigned int len) -{ - void *ret = dst; - u16 *d = dst; - u16 *s = (u16 *)src; - - len >>= 1; - while (len-- > 0) - ebi_nand_write_word(*s++, d++); - - return ret; -} - -static inline int onenand_bufferram_offset(struct mtd_info *mtd, int area) -{ - struct onenand_chip *this = mtd->priv; - - if (ONENAND_CURRENT_BUFFERRAM(this)) { - if (area == ONENAND_DATARAM) - return mtd->writesize; - if (area == ONENAND_SPARERAM) - return mtd->oobsize; - } - - return 0; -} - -static int ebi_read_bufferram(struct mtd_info *mtd, loff_t addr, int area, - unsigned char *buffer, int offset, - size_t count) -{ - struct onenand_chip *this = mtd->priv; - void __iomem *bufferram; - - bufferram = this->base + area; - bufferram += onenand_bufferram_offset(mtd, area); - - if (count < 4) - memcpy_16_from_onenand(buffer, bufferram + offset, count); - else - memcpy_32_from_onenand(buffer, bufferram + offset, count); - - return 0; -} - -static int ebi_write_bufferram(struct mtd_info *mtd, loff_t addr, int area, - const unsigned char *buffer, int offset, - size_t count) -{ - struct onenand_chip *this = mtd->priv; - void __iomem *bufferram; - - bufferram = this->base + area; - bufferram += onenand_bufferram_offset(mtd, area); - - memcpy_16_to_onenand(bufferram + offset, buffer, count); - - return 0; -} - -int onenand_board_init(struct mtd_info *mtd) -{ - struct onenand_chip *chip = mtd->priv; - - /* - * Insert board specific OneNAND access functions - */ - chip->read_word = ebi_nand_read_word; - chip->write_word = ebi_nand_write_word; - - chip->read_bufferram = ebi_read_bufferram; - chip->write_bufferram = ebi_write_bufferram; - - return 0; -} |