On AXS10x boards we have non-standard NAND controller which was never really used a lot as there're other much more convenient [as they are standard & removable] persistent media like SD-card and USB mass storage.
Moreover after recent changes we face with some NAND controller runtime issues. So instead of keeping support of yet another non-standard peripheral we're dropping its support for good.
Signed-off-by: Eugeniy Paltsev Eugeniy.Paltsev@synopsys.com --- board/synopsys/axs10x/Makefile | 1 - board/synopsys/axs10x/nand.c | 242 ----------------------------------------- configs/axs101_defconfig | 1 - configs/axs103_defconfig | 1 - include/configs/axs10x.h | 6 - 5 files changed, 251 deletions(-) delete mode 100644 board/synopsys/axs10x/nand.c
diff --git a/board/synopsys/axs10x/Makefile b/board/synopsys/axs10x/Makefile index 340e12c4432..dd5ee680e7b 100644 --- a/board/synopsys/axs10x/Makefile +++ b/board/synopsys/axs10x/Makefile @@ -3,4 +3,3 @@ # Copyright (C) 2013-2016 Synopsys, Inc. All rights reserved.
obj-y += axs10x.o -obj-$(CONFIG_CMD_NAND) += nand.o diff --git a/board/synopsys/axs10x/nand.c b/board/synopsys/axs10x/nand.c deleted file mode 100644 index 8108460f581..00000000000 --- a/board/synopsys/axs10x/nand.c +++ /dev/null @@ -1,242 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* - * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved. - */ - -#include <bouncebuf.h> -#include <common.h> -#include <malloc.h> -#include <nand.h> -#include <asm/io.h> -#include "axs10x.h" - -DECLARE_GLOBAL_DATA_PTR; - -#define BUS_WIDTH 8 /* AXI data bus width in bytes */ - -/* DMA buffer descriptor bits & masks */ -#define BD_STAT_OWN (1 << 31) -#define BD_STAT_BD_FIRST (1 << 3) -#define BD_STAT_BD_LAST (1 << 2) -#define BD_SIZES_BUFFER1_MASK 0xfff - -#define BD_STAT_BD_COMPLETE (BD_STAT_BD_FIRST | BD_STAT_BD_LAST) - -/* Controller command flags */ -#define B_WFR (1 << 19) /* 1b - Wait for ready */ -#define B_LC (1 << 18) /* 1b - Last cycle */ -#define B_IWC (1 << 13) /* 1b - Interrupt when complete */ - -/* NAND cycle types */ -#define B_CT_ADDRESS (0x0 << 16) /* Address operation */ -#define B_CT_COMMAND (0x1 << 16) /* Command operation */ -#define B_CT_WRITE (0x2 << 16) /* Write operation */ -#define B_CT_READ (0x3 << 16) /* Write operation */ - -enum nand_isr_t { - NAND_ISR_DATAREQUIRED = 0, - NAND_ISR_TXUNDERFLOW, - NAND_ISR_TXOVERFLOW, - NAND_ISR_DATAAVAILABLE, - NAND_ISR_RXUNDERFLOW, - NAND_ISR_RXOVERFLOW, - NAND_ISR_TXDMACOMPLETE, - NAND_ISR_RXDMACOMPLETE, - NAND_ISR_DESCRIPTORUNAVAILABLE, - NAND_ISR_CMDDONE, - NAND_ISR_CMDAVAILABLE, - NAND_ISR_CMDERROR, - NAND_ISR_DATATRANSFEROVER, - NAND_ISR_NONE -}; - -enum nand_regs_t { - AC_FIFO = 0, /* address and command fifo */ - IDMAC_BDADDR = 0x18, /* idmac descriptor list base address */ - INT_STATUS = 0x118, /* interrupt status register */ - INT_CLR_STATUS = 0x120, /* interrupt clear status register */ -}; - -struct nand_bd { - uint32_t status; /* DES0 */ - uint32_t sizes; /* DES1 */ - uint32_t buffer_ptr0; /* DES2 */ - uint32_t buffer_ptr1; /* DES3 */ -}; - -#define NAND_REG_WRITE(r, v) \ - writel(v, (volatile void __iomem *)(CONFIG_SYS_NAND_BASE + r)) -#define NAND_REG_READ(r) \ - readl((const volatile void __iomem *)(CONFIG_SYS_NAND_BASE + r)) - -static struct nand_bd *bd; /* DMA buffer descriptors */ - -/** - * axs101_nand_write_buf - write buffer to chip - * @mtd: MTD device structure - * @buf: data buffer - * @len: number of bytes to write - */ -static uint32_t nand_flag_is_set(uint32_t flag) -{ - uint32_t reg = NAND_REG_READ(INT_STATUS); - - if (reg & (1 << NAND_ISR_CMDERROR)) - return 0; - - if (reg & (1 << flag)) { - NAND_REG_WRITE(INT_CLR_STATUS, 1 << flag); - return 1; - } - - return 0; -} - -/** - * axs101_nand_write_buf - write buffer to chip - * @mtd: MTD device structure - * @buf: data buffer - * @len: number of bytes to write - */ -static void axs101_nand_write_buf(struct mtd_info *mtd, const u_char *buf, - int len) -{ - struct bounce_buffer bbstate; - - bounce_buffer_start(&bbstate, (void *)buf, len, GEN_BB_READ); - - /* Setup buffer descriptor */ - writel(BD_STAT_OWN | BD_STAT_BD_COMPLETE, &bd->status); - writel(ALIGN(len, BUS_WIDTH) & BD_SIZES_BUFFER1_MASK, &bd->sizes); - writel(bbstate.bounce_buffer, &bd->buffer_ptr0); - writel(0, &bd->buffer_ptr1); - - /* Flush modified buffer descriptor */ - flush_dcache_range((unsigned long)bd, - (unsigned long)bd + sizeof(struct nand_bd)); - - /* Issue "write" command */ - NAND_REG_WRITE(AC_FIFO, B_CT_WRITE | B_WFR | B_IWC | B_LC | (len-1)); - - /* Wait for NAND command and DMA to complete */ - while (!nand_flag_is_set(NAND_ISR_CMDDONE)) - ; - while (!nand_flag_is_set(NAND_ISR_TXDMACOMPLETE)) - ; - - bounce_buffer_stop(&bbstate); -} - -/** - * axs101_nand_read_buf - read chip data into buffer - * @mtd: MTD device structure - * @buf: buffer to store data - * @len: number of bytes to read - */ -static void axs101_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len) -{ - struct bounce_buffer bbstate; - - bounce_buffer_start(&bbstate, buf, len, GEN_BB_WRITE); - - /* Setup buffer descriptor */ - writel(BD_STAT_OWN | BD_STAT_BD_COMPLETE, &bd->status); - writel(ALIGN(len, BUS_WIDTH) & BD_SIZES_BUFFER1_MASK, &bd->sizes); - writel(bbstate.bounce_buffer, &bd->buffer_ptr0); - writel(0, &bd->buffer_ptr1); - - /* Flush modified buffer descriptor */ - flush_dcache_range((unsigned long)bd, - (unsigned long)bd + sizeof(struct nand_bd)); - - /* Issue "read" command */ - NAND_REG_WRITE(AC_FIFO, B_CT_READ | B_WFR | B_IWC | B_LC | (len - 1)); - - /* Wait for NAND command and DMA to complete */ - while (!nand_flag_is_set(NAND_ISR_CMDDONE)) - ; - while (!nand_flag_is_set(NAND_ISR_RXDMACOMPLETE)) - ; - - bounce_buffer_stop(&bbstate); -} - -/** - * axs101_nand_read_byte - read one byte from the chip - * @mtd: MTD device structure - */ -static u_char axs101_nand_read_byte(struct mtd_info *mtd) -{ - u8 byte; - - axs101_nand_read_buf(mtd, (uchar *)&byte, sizeof(byte)); - return byte; -} - -/** - * axs101_nand_read_word - read one word from the chip - * @mtd: MTD device structure - */ -static u16 axs101_nand_read_word(struct mtd_info *mtd) -{ - u16 word; - - axs101_nand_read_buf(mtd, (uchar *)&word, sizeof(word)); - return word; -} - -/** - * axs101_nand_hwcontrol - NAND control functions wrapper. - * @mtd: MTD device structure - * @cmd: Command - */ -static void axs101_nand_hwcontrol(struct mtd_info *mtdinfo, int cmd, - unsigned int ctrl) -{ - if (cmd == NAND_CMD_NONE) - return; - - cmd = cmd & 0xff; - - switch (ctrl & (NAND_ALE | NAND_CLE)) { - /* Address */ - case NAND_ALE: - cmd |= B_CT_ADDRESS; - break; - - /* Command */ - case NAND_CLE: - cmd |= B_CT_COMMAND | B_WFR; - - break; - - default: - debug("%s: unknown ctrl %#x\n", __func__, ctrl); - } - - NAND_REG_WRITE(AC_FIFO, cmd | B_LC); - while (!nand_flag_is_set(NAND_ISR_CMDDONE)) - ; -} - -int board_nand_init(struct nand_chip *nand) -{ - bd = (struct nand_bd *)memalign(ARCH_DMA_MINALIGN, - sizeof(struct nand_bd)); - - /* Set buffer descriptor address in IDMAC */ - NAND_REG_WRITE(IDMAC_BDADDR, bd); - - nand->ecc.mode = NAND_ECC_SOFT; - nand->cmd_ctrl = axs101_nand_hwcontrol; - nand->read_byte = axs101_nand_read_byte; - nand->read_word = axs101_nand_read_word; - nand->write_buf = axs101_nand_write_buf; - nand->read_buf = axs101_nand_read_buf; - - /* MBv3 has NAND IC with 16-bit data bus */ - if (gd->board_type == AXS_MB_V3) - nand->options |= NAND_BUSWIDTH_16; - - return 0; -} diff --git a/configs/axs101_defconfig b/configs/axs101_defconfig index 6ef6616554d..0bfb532fc74 100644 --- a/configs/axs101_defconfig +++ b/configs/axs101_defconfig @@ -14,7 +14,6 @@ CONFIG_HUSH_PARSER=y CONFIG_SYS_PROMPT="AXS# " # CONFIG_CMD_FLASH is not set CONFIG_CMD_MMC=y -CONFIG_CMD_NAND=y CONFIG_CMD_SF=y CONFIG_CMD_SPI=y CONFIG_CMD_USB=y diff --git a/configs/axs103_defconfig b/configs/axs103_defconfig index 2208bdb9be6..0c8af405a97 100644 --- a/configs/axs103_defconfig +++ b/configs/axs103_defconfig @@ -14,7 +14,6 @@ CONFIG_HUSH_PARSER=y CONFIG_SYS_PROMPT="AXS# " # CONFIG_CMD_FLASH is not set CONFIG_CMD_MMC=y -CONFIG_CMD_NAND=y CONFIG_CMD_SF=y CONFIG_CMD_SPI=y CONFIG_CMD_USB=y diff --git a/include/configs/axs10x.h b/include/configs/axs10x.h index 0f4d78a5945..0c5a3af4cc4 100644 --- a/include/configs/axs10x.h +++ b/include/configs/axs10x.h @@ -31,12 +31,6 @@ #define CONFIG_SYS_BOOTM_LEN SZ_128M #define CONFIG_SYS_LOAD_ADDR 0x82000000
-/* - * NAND Flash configuration - */ -#define CONFIG_SYS_NAND_BASE (ARC_FPGA_PERIPHERAL_BASE + 0x16000) -#define CONFIG_SYS_MAX_NAND_DEVICE 1 - /* * UART configuration */