mirror of
https://github.com/AsahiLinux/u-boot
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401d1c4f5d
Move this out of the common header and include it only where needed. In a number of cases this requires adding "struct udevice;" to avoid adding another large header or in other cases replacing / adding missing header files that had been pulled in, very indirectly. Finally, we have a few cases where we did not need to include <asm/global_data.h> at all, so remove that include. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Rini <trini@konsulko.com>
1956 lines
51 KiB
C
1956 lines
51 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* drivers/mtd/nand/raw/pxa3xx_nand.c
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*
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* Copyright © 2005 Intel Corporation
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* Copyright © 2006 Marvell International Ltd.
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*/
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#include <common.h>
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#include <malloc.h>
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#include <fdtdec.h>
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#include <nand.h>
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#include <asm/global_data.h>
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#include <dm/device_compat.h>
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#include <dm/devres.h>
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#include <linux/bitops.h>
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#include <linux/bug.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/errno.h>
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#include <asm/io.h>
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#include <asm/arch/cpu.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/rawnand.h>
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#include <linux/types.h>
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#include <syscon.h>
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#include <regmap.h>
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#include <dm/uclass.h>
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#include <dm/read.h>
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#include "pxa3xx_nand.h"
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DECLARE_GLOBAL_DATA_PTR;
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#define TIMEOUT_DRAIN_FIFO 5 /* in ms */
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#define CHIP_DELAY_TIMEOUT 200
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#define NAND_STOP_DELAY 40
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/*
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* Define a buffer size for the initial command that detects the flash device:
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* STATUS, READID and PARAM.
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* ONFI param page is 256 bytes, and there are three redundant copies
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* to be read. JEDEC param page is 512 bytes, and there are also three
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* redundant copies to be read.
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* Hence this buffer should be at least 512 x 3. Let's pick 2048.
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*/
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#define INIT_BUFFER_SIZE 2048
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/* registers and bit definitions */
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#define NDCR (0x00) /* Control register */
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#define NDTR0CS0 (0x04) /* Timing Parameter 0 for CS0 */
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#define NDTR1CS0 (0x0C) /* Timing Parameter 1 for CS0 */
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#define NDSR (0x14) /* Status Register */
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#define NDPCR (0x18) /* Page Count Register */
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#define NDBDR0 (0x1C) /* Bad Block Register 0 */
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#define NDBDR1 (0x20) /* Bad Block Register 1 */
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#define NDECCCTRL (0x28) /* ECC control */
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#define NDDB (0x40) /* Data Buffer */
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#define NDCB0 (0x48) /* Command Buffer0 */
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#define NDCB1 (0x4C) /* Command Buffer1 */
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#define NDCB2 (0x50) /* Command Buffer2 */
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#define NDCR_SPARE_EN (0x1 << 31)
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#define NDCR_ECC_EN (0x1 << 30)
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#define NDCR_DMA_EN (0x1 << 29)
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#define NDCR_ND_RUN (0x1 << 28)
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#define NDCR_DWIDTH_C (0x1 << 27)
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#define NDCR_DWIDTH_M (0x1 << 26)
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#define NDCR_PAGE_SZ (0x1 << 24)
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#define NDCR_NCSX (0x1 << 23)
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#define NDCR_ND_MODE (0x3 << 21)
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#define NDCR_NAND_MODE (0x0)
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#define NDCR_CLR_PG_CNT (0x1 << 20)
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#define NFCV1_NDCR_ARB_CNTL (0x1 << 19)
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#define NDCR_RD_ID_CNT_MASK (0x7 << 16)
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#define NDCR_RD_ID_CNT(x) (((x) << 16) & NDCR_RD_ID_CNT_MASK)
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#define NDCR_RA_START (0x1 << 15)
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#define NDCR_PG_PER_BLK (0x1 << 14)
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#define NDCR_ND_ARB_EN (0x1 << 12)
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#define NDCR_INT_MASK (0xFFF)
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#define NDSR_MASK (0xfff)
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#define NDSR_ERR_CNT_OFF (16)
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#define NDSR_ERR_CNT_MASK (0x1f)
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#define NDSR_ERR_CNT(sr) ((sr >> NDSR_ERR_CNT_OFF) & NDSR_ERR_CNT_MASK)
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#define NDSR_RDY (0x1 << 12)
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#define NDSR_FLASH_RDY (0x1 << 11)
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#define NDSR_CS0_PAGED (0x1 << 10)
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#define NDSR_CS1_PAGED (0x1 << 9)
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#define NDSR_CS0_CMDD (0x1 << 8)
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#define NDSR_CS1_CMDD (0x1 << 7)
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#define NDSR_CS0_BBD (0x1 << 6)
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#define NDSR_CS1_BBD (0x1 << 5)
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#define NDSR_UNCORERR (0x1 << 4)
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#define NDSR_CORERR (0x1 << 3)
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#define NDSR_WRDREQ (0x1 << 2)
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#define NDSR_RDDREQ (0x1 << 1)
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#define NDSR_WRCMDREQ (0x1)
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#define NDCB0_LEN_OVRD (0x1 << 28)
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#define NDCB0_ST_ROW_EN (0x1 << 26)
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#define NDCB0_AUTO_RS (0x1 << 25)
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#define NDCB0_CSEL (0x1 << 24)
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#define NDCB0_EXT_CMD_TYPE_MASK (0x7 << 29)
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#define NDCB0_EXT_CMD_TYPE(x) (((x) << 29) & NDCB0_EXT_CMD_TYPE_MASK)
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#define NDCB0_CMD_TYPE_MASK (0x7 << 21)
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#define NDCB0_CMD_TYPE(x) (((x) << 21) & NDCB0_CMD_TYPE_MASK)
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#define NDCB0_NC (0x1 << 20)
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#define NDCB0_DBC (0x1 << 19)
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#define NDCB0_ADDR_CYC_MASK (0x7 << 16)
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#define NDCB0_ADDR_CYC(x) (((x) << 16) & NDCB0_ADDR_CYC_MASK)
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#define NDCB0_CMD2_MASK (0xff << 8)
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#define NDCB0_CMD1_MASK (0xff)
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#define NDCB0_ADDR_CYC_SHIFT (16)
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#define EXT_CMD_TYPE_DISPATCH 6 /* Command dispatch */
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#define EXT_CMD_TYPE_NAKED_RW 5 /* Naked read or Naked write */
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#define EXT_CMD_TYPE_READ 4 /* Read */
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#define EXT_CMD_TYPE_DISP_WR 4 /* Command dispatch with write */
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#define EXT_CMD_TYPE_FINAL 3 /* Final command */
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#define EXT_CMD_TYPE_LAST_RW 1 /* Last naked read/write */
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#define EXT_CMD_TYPE_MONO 0 /* Monolithic read/write */
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/* System control register and bit to enable NAND on some SoCs */
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#define GENCONF_SOC_DEVICE_MUX 0x208
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#define GENCONF_SOC_DEVICE_MUX_NFC_EN BIT(0)
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/*
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* This should be large enough to read 'ONFI' and 'JEDEC'.
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* Let's use 7 bytes, which is the maximum ID count supported
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* by the controller (see NDCR_RD_ID_CNT_MASK).
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*/
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#define READ_ID_BYTES 7
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/* macros for registers read/write */
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#define nand_writel(info, off, val) \
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writel((val), (info)->mmio_base + (off))
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#define nand_readl(info, off) \
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readl((info)->mmio_base + (off))
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/* error code and state */
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enum {
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ERR_NONE = 0,
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ERR_DMABUSERR = -1,
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ERR_SENDCMD = -2,
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ERR_UNCORERR = -3,
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ERR_BBERR = -4,
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ERR_CORERR = -5,
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};
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enum {
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STATE_IDLE = 0,
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STATE_PREPARED,
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STATE_CMD_HANDLE,
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STATE_DMA_READING,
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STATE_DMA_WRITING,
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STATE_DMA_DONE,
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STATE_PIO_READING,
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STATE_PIO_WRITING,
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STATE_CMD_DONE,
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STATE_READY,
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};
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enum pxa3xx_nand_variant {
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PXA3XX_NAND_VARIANT_PXA,
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PXA3XX_NAND_VARIANT_ARMADA370,
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PXA3XX_NAND_VARIANT_ARMADA_8K,
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};
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struct pxa3xx_nand_host {
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struct nand_chip chip;
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void *info_data;
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/* page size of attached chip */
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int use_ecc;
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int cs;
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/* calculated from pxa3xx_nand_flash data */
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unsigned int col_addr_cycles;
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unsigned int row_addr_cycles;
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};
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struct pxa3xx_nand_info {
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struct nand_hw_control controller;
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struct pxa3xx_nand_platform_data *pdata;
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struct clk *clk;
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void __iomem *mmio_base;
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unsigned long mmio_phys;
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int cmd_complete, dev_ready;
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unsigned int buf_start;
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unsigned int buf_count;
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unsigned int buf_size;
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unsigned int data_buff_pos;
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unsigned int oob_buff_pos;
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unsigned char *data_buff;
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unsigned char *oob_buff;
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struct pxa3xx_nand_host *host[NUM_CHIP_SELECT];
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unsigned int state;
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/*
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* This driver supports NFCv1 (as found in PXA SoC)
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* and NFCv2 (as found in Armada 370/XP SoC).
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*/
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enum pxa3xx_nand_variant variant;
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int cs;
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int use_ecc; /* use HW ECC ? */
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int force_raw; /* prevent use_ecc to be set */
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int ecc_bch; /* using BCH ECC? */
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int use_spare; /* use spare ? */
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int need_wait;
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/* Amount of real data per full chunk */
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unsigned int chunk_size;
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/* Amount of spare data per full chunk */
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unsigned int spare_size;
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/* Number of full chunks (i.e chunk_size + spare_size) */
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unsigned int nfullchunks;
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/*
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* Total number of chunks. If equal to nfullchunks, then there
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* are only full chunks. Otherwise, there is one last chunk of
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* size (last_chunk_size + last_spare_size)
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*/
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unsigned int ntotalchunks;
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/* Amount of real data in the last chunk */
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unsigned int last_chunk_size;
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/* Amount of spare data in the last chunk */
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unsigned int last_spare_size;
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unsigned int ecc_size;
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unsigned int ecc_err_cnt;
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unsigned int max_bitflips;
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int retcode;
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/*
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* Variables only valid during command
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* execution. step_chunk_size and step_spare_size is the
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* amount of real data and spare data in the current
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* chunk. cur_chunk is the current chunk being
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* read/programmed.
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*/
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unsigned int step_chunk_size;
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unsigned int step_spare_size;
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unsigned int cur_chunk;
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/* cached register value */
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uint32_t reg_ndcr;
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uint32_t ndtr0cs0;
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uint32_t ndtr1cs0;
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/* generated NDCBx register values */
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uint32_t ndcb0;
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uint32_t ndcb1;
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uint32_t ndcb2;
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uint32_t ndcb3;
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};
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static struct pxa3xx_nand_timing timing[] = {
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/*
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* tCH Enable signal hold time
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* tCS Enable signal setup time
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* tWH ND_nWE high duration
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* tWP ND_nWE pulse time
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* tRH ND_nRE high duration
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* tRP ND_nRE pulse width
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* tR ND_nWE high to ND_nRE low for read
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* tWHR ND_nWE high to ND_nRE low for status read
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* tAR ND_ALE low to ND_nRE low delay
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*/
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/*ch cs wh wp rh rp r whr ar */
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{ 40, 80, 60, 100, 80, 100, 90000, 400, 40, },
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{ 10, 0, 20, 40, 30, 40, 11123, 110, 10, },
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{ 10, 25, 15, 25, 15, 30, 25000, 60, 10, },
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{ 10, 35, 15, 25, 15, 25, 25000, 60, 10, },
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{ 5, 20, 10, 12, 10, 12, 25000, 60, 10, },
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};
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static struct pxa3xx_nand_flash builtin_flash_types[] = {
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/*
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* chip_id
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* flash_width Width of Flash memory (DWIDTH_M)
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* dfc_width Width of flash controller(DWIDTH_C)
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* *timing
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* http://www.linux-mtd.infradead.org/nand-data/nanddata.html
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*/
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{ 0x46ec, 16, 16, &timing[1] },
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{ 0xdaec, 8, 8, &timing[1] },
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{ 0xd7ec, 8, 8, &timing[1] },
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{ 0xa12c, 8, 8, &timing[2] },
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{ 0xb12c, 16, 16, &timing[2] },
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{ 0xdc2c, 8, 8, &timing[2] },
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{ 0xcc2c, 16, 16, &timing[2] },
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{ 0xba20, 16, 16, &timing[3] },
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{ 0xda98, 8, 8, &timing[4] },
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};
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#ifdef CONFIG_SYS_NAND_USE_FLASH_BBT
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static u8 bbt_pattern[] = {'M', 'V', 'B', 'b', 't', '0' };
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static u8 bbt_mirror_pattern[] = {'1', 't', 'b', 'B', 'V', 'M' };
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static struct nand_bbt_descr bbt_main_descr = {
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.options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
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| NAND_BBT_2BIT | NAND_BBT_VERSION,
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.offs = 8,
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.len = 6,
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.veroffs = 14,
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.maxblocks = 8, /* Last 8 blocks in each chip */
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.pattern = bbt_pattern
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};
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static struct nand_bbt_descr bbt_mirror_descr = {
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.options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE
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| NAND_BBT_2BIT | NAND_BBT_VERSION,
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.offs = 8,
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.len = 6,
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.veroffs = 14,
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.maxblocks = 8, /* Last 8 blocks in each chip */
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.pattern = bbt_mirror_pattern
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};
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#endif
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static struct nand_ecclayout ecc_layout_2KB_bch4bit = {
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.eccbytes = 32,
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.eccpos = {
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32, 33, 34, 35, 36, 37, 38, 39,
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40, 41, 42, 43, 44, 45, 46, 47,
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48, 49, 50, 51, 52, 53, 54, 55,
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56, 57, 58, 59, 60, 61, 62, 63},
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.oobfree = { {2, 30} }
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};
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static struct nand_ecclayout ecc_layout_2KB_bch8bit = {
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.eccbytes = 64,
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.eccpos = {
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32, 33, 34, 35, 36, 37, 38, 39,
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40, 41, 42, 43, 44, 45, 46, 47,
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48, 49, 50, 51, 52, 53, 54, 55,
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56, 57, 58, 59, 60, 61, 62, 63,
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64, 65, 66, 67, 68, 69, 70, 71,
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72, 73, 74, 75, 76, 77, 78, 79,
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80, 81, 82, 83, 84, 85, 86, 87,
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88, 89, 90, 91, 92, 93, 94, 95},
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.oobfree = { {1, 4}, {6, 26} }
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};
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static struct nand_ecclayout ecc_layout_4KB_bch4bit = {
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.eccbytes = 64,
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.eccpos = {
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32, 33, 34, 35, 36, 37, 38, 39,
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40, 41, 42, 43, 44, 45, 46, 47,
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48, 49, 50, 51, 52, 53, 54, 55,
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56, 57, 58, 59, 60, 61, 62, 63,
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96, 97, 98, 99, 100, 101, 102, 103,
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104, 105, 106, 107, 108, 109, 110, 111,
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112, 113, 114, 115, 116, 117, 118, 119,
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120, 121, 122, 123, 124, 125, 126, 127},
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/* Bootrom looks in bytes 0 & 5 for bad blocks */
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.oobfree = { {6, 26}, { 64, 32} }
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};
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static struct nand_ecclayout ecc_layout_8KB_bch4bit = {
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.eccbytes = 128,
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.eccpos = {
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32, 33, 34, 35, 36, 37, 38, 39,
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40, 41, 42, 43, 44, 45, 46, 47,
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48, 49, 50, 51, 52, 53, 54, 55,
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56, 57, 58, 59, 60, 61, 62, 63,
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96, 97, 98, 99, 100, 101, 102, 103,
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104, 105, 106, 107, 108, 109, 110, 111,
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112, 113, 114, 115, 116, 117, 118, 119,
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120, 121, 122, 123, 124, 125, 126, 127,
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160, 161, 162, 163, 164, 165, 166, 167,
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168, 169, 170, 171, 172, 173, 174, 175,
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176, 177, 178, 179, 180, 181, 182, 183,
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184, 185, 186, 187, 188, 189, 190, 191,
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224, 225, 226, 227, 228, 229, 230, 231,
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232, 233, 234, 235, 236, 237, 238, 239,
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240, 241, 242, 243, 244, 245, 246, 247,
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248, 249, 250, 251, 252, 253, 254, 255},
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/* Bootrom looks in bytes 0 & 5 for bad blocks */
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.oobfree = { {1, 4}, {6, 26}, { 64, 32}, {128, 32}, {192, 32} }
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};
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static struct nand_ecclayout ecc_layout_4KB_bch8bit = {
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.eccbytes = 128,
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.eccpos = {
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32, 33, 34, 35, 36, 37, 38, 39,
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40, 41, 42, 43, 44, 45, 46, 47,
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48, 49, 50, 51, 52, 53, 54, 55,
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56, 57, 58, 59, 60, 61, 62, 63},
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.oobfree = { }
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};
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static struct nand_ecclayout ecc_layout_8KB_bch8bit = {
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.eccbytes = 256,
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.eccpos = {},
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/* HW ECC handles all ECC data and all spare area is free for OOB */
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.oobfree = {{0, 160} }
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};
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#define NDTR0_tCH(c) (min((c), 7) << 19)
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#define NDTR0_tCS(c) (min((c), 7) << 16)
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#define NDTR0_tWH(c) (min((c), 7) << 11)
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#define NDTR0_tWP(c) (min((c), 7) << 8)
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#define NDTR0_tRH(c) (min((c), 7) << 3)
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#define NDTR0_tRP(c) (min((c), 7) << 0)
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#define NDTR1_tR(c) (min((c), 65535) << 16)
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#define NDTR1_tWHR(c) (min((c), 15) << 4)
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#define NDTR1_tAR(c) (min((c), 15) << 0)
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/* convert nano-seconds to nand flash controller clock cycles */
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#define ns2cycle(ns, clk) (int)((ns) * (clk / 1000000) / 1000)
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static const struct udevice_id pxa3xx_nand_dt_ids[] = {
|
|
{
|
|
.compatible = "marvell,mvebu-pxa3xx-nand",
|
|
.data = PXA3XX_NAND_VARIANT_ARMADA370,
|
|
},
|
|
{
|
|
.compatible = "marvell,armada-8k-nand-controller",
|
|
.data = PXA3XX_NAND_VARIANT_ARMADA_8K,
|
|
},
|
|
{}
|
|
};
|
|
|
|
static enum pxa3xx_nand_variant pxa3xx_nand_get_variant(struct udevice *dev)
|
|
{
|
|
return dev_get_driver_data(dev);
|
|
}
|
|
|
|
static void pxa3xx_nand_set_timing(struct pxa3xx_nand_host *host,
|
|
const struct pxa3xx_nand_timing *t)
|
|
{
|
|
struct pxa3xx_nand_info *info = host->info_data;
|
|
unsigned long nand_clk = mvebu_get_nand_clock();
|
|
uint32_t ndtr0, ndtr1;
|
|
|
|
ndtr0 = NDTR0_tCH(ns2cycle(t->tCH, nand_clk)) |
|
|
NDTR0_tCS(ns2cycle(t->tCS, nand_clk)) |
|
|
NDTR0_tWH(ns2cycle(t->tWH, nand_clk)) |
|
|
NDTR0_tWP(ns2cycle(t->tWP, nand_clk)) |
|
|
NDTR0_tRH(ns2cycle(t->tRH, nand_clk)) |
|
|
NDTR0_tRP(ns2cycle(t->tRP, nand_clk));
|
|
|
|
ndtr1 = NDTR1_tR(ns2cycle(t->tR, nand_clk)) |
|
|
NDTR1_tWHR(ns2cycle(t->tWHR, nand_clk)) |
|
|
NDTR1_tAR(ns2cycle(t->tAR, nand_clk));
|
|
|
|
info->ndtr0cs0 = ndtr0;
|
|
info->ndtr1cs0 = ndtr1;
|
|
nand_writel(info, NDTR0CS0, ndtr0);
|
|
nand_writel(info, NDTR1CS0, ndtr1);
|
|
}
|
|
|
|
static void pxa3xx_nand_set_sdr_timing(struct pxa3xx_nand_host *host,
|
|
const struct nand_sdr_timings *t)
|
|
{
|
|
struct pxa3xx_nand_info *info = host->info_data;
|
|
struct nand_chip *chip = &host->chip;
|
|
unsigned long nand_clk = mvebu_get_nand_clock();
|
|
uint32_t ndtr0, ndtr1;
|
|
|
|
u32 tCH_min = DIV_ROUND_UP(t->tCH_min, 1000);
|
|
u32 tCS_min = DIV_ROUND_UP(t->tCS_min, 1000);
|
|
u32 tWH_min = DIV_ROUND_UP(t->tWH_min, 1000);
|
|
u32 tWP_min = DIV_ROUND_UP(t->tWC_min - t->tWH_min, 1000);
|
|
u32 tREH_min = DIV_ROUND_UP(t->tREH_min, 1000);
|
|
u32 tRP_min = DIV_ROUND_UP(t->tRC_min - t->tREH_min, 1000);
|
|
u32 tR = chip->chip_delay * 1000;
|
|
u32 tWHR_min = DIV_ROUND_UP(t->tWHR_min, 1000);
|
|
u32 tAR_min = DIV_ROUND_UP(t->tAR_min, 1000);
|
|
|
|
/* fallback to a default value if tR = 0 */
|
|
if (!tR)
|
|
tR = 20000;
|
|
|
|
ndtr0 = NDTR0_tCH(ns2cycle(tCH_min, nand_clk)) |
|
|
NDTR0_tCS(ns2cycle(tCS_min, nand_clk)) |
|
|
NDTR0_tWH(ns2cycle(tWH_min, nand_clk)) |
|
|
NDTR0_tWP(ns2cycle(tWP_min, nand_clk)) |
|
|
NDTR0_tRH(ns2cycle(tREH_min, nand_clk)) |
|
|
NDTR0_tRP(ns2cycle(tRP_min, nand_clk));
|
|
|
|
ndtr1 = NDTR1_tR(ns2cycle(tR, nand_clk)) |
|
|
NDTR1_tWHR(ns2cycle(tWHR_min, nand_clk)) |
|
|
NDTR1_tAR(ns2cycle(tAR_min, nand_clk));
|
|
|
|
info->ndtr0cs0 = ndtr0;
|
|
info->ndtr1cs0 = ndtr1;
|
|
nand_writel(info, NDTR0CS0, ndtr0);
|
|
nand_writel(info, NDTR1CS0, ndtr1);
|
|
}
|
|
|
|
static int pxa3xx_nand_init_timings(struct pxa3xx_nand_host *host)
|
|
{
|
|
const struct nand_sdr_timings *timings;
|
|
struct nand_chip *chip = &host->chip;
|
|
struct pxa3xx_nand_info *info = host->info_data;
|
|
const struct pxa3xx_nand_flash *f = NULL;
|
|
struct mtd_info *mtd = nand_to_mtd(&host->chip);
|
|
int mode, id, ntypes, i;
|
|
|
|
mode = onfi_get_async_timing_mode(chip);
|
|
if (mode == ONFI_TIMING_MODE_UNKNOWN) {
|
|
ntypes = ARRAY_SIZE(builtin_flash_types);
|
|
|
|
chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
|
|
|
|
id = chip->read_byte(mtd);
|
|
id |= chip->read_byte(mtd) << 0x8;
|
|
|
|
for (i = 0; i < ntypes; i++) {
|
|
f = &builtin_flash_types[i];
|
|
|
|
if (f->chip_id == id)
|
|
break;
|
|
}
|
|
|
|
if (i == ntypes) {
|
|
dev_err(mtd->dev, "Error: timings not found\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
pxa3xx_nand_set_timing(host, f->timing);
|
|
|
|
if (f->flash_width == 16) {
|
|
info->reg_ndcr |= NDCR_DWIDTH_M;
|
|
chip->options |= NAND_BUSWIDTH_16;
|
|
}
|
|
|
|
info->reg_ndcr |= (f->dfc_width == 16) ? NDCR_DWIDTH_C : 0;
|
|
} else {
|
|
mode = fls(mode) - 1;
|
|
if (mode < 0)
|
|
mode = 0;
|
|
|
|
timings = onfi_async_timing_mode_to_sdr_timings(mode);
|
|
if (IS_ERR(timings))
|
|
return PTR_ERR(timings);
|
|
|
|
pxa3xx_nand_set_sdr_timing(host, timings);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* NOTE: it is a must to set ND_RUN first, then write
|
|
* command buffer, otherwise, it does not work.
|
|
* We enable all the interrupt at the same time, and
|
|
* let pxa3xx_nand_irq to handle all logic.
|
|
*/
|
|
static void pxa3xx_nand_start(struct pxa3xx_nand_info *info)
|
|
{
|
|
uint32_t ndcr;
|
|
|
|
ndcr = info->reg_ndcr;
|
|
|
|
if (info->use_ecc) {
|
|
ndcr |= NDCR_ECC_EN;
|
|
if (info->ecc_bch)
|
|
nand_writel(info, NDECCCTRL, 0x1);
|
|
} else {
|
|
ndcr &= ~NDCR_ECC_EN;
|
|
if (info->ecc_bch)
|
|
nand_writel(info, NDECCCTRL, 0x0);
|
|
}
|
|
|
|
ndcr &= ~NDCR_DMA_EN;
|
|
|
|
if (info->use_spare)
|
|
ndcr |= NDCR_SPARE_EN;
|
|
else
|
|
ndcr &= ~NDCR_SPARE_EN;
|
|
|
|
ndcr |= NDCR_ND_RUN;
|
|
|
|
/* clear status bits and run */
|
|
nand_writel(info, NDSR, NDSR_MASK);
|
|
nand_writel(info, NDCR, 0);
|
|
nand_writel(info, NDCR, ndcr);
|
|
}
|
|
|
|
static void disable_int(struct pxa3xx_nand_info *info, uint32_t int_mask)
|
|
{
|
|
uint32_t ndcr;
|
|
|
|
ndcr = nand_readl(info, NDCR);
|
|
nand_writel(info, NDCR, ndcr | int_mask);
|
|
}
|
|
|
|
static void drain_fifo(struct pxa3xx_nand_info *info, void *data, int len)
|
|
{
|
|
if (info->ecc_bch && !info->force_raw) {
|
|
u32 ts;
|
|
|
|
/*
|
|
* According to the datasheet, when reading from NDDB
|
|
* with BCH enabled, after each 32 bytes reads, we
|
|
* have to make sure that the NDSR.RDDREQ bit is set.
|
|
*
|
|
* Drain the FIFO 8 32 bits reads at a time, and skip
|
|
* the polling on the last read.
|
|
*/
|
|
while (len > 8) {
|
|
readsl(info->mmio_base + NDDB, data, 8);
|
|
|
|
ts = get_timer(0);
|
|
while (!(nand_readl(info, NDSR) & NDSR_RDDREQ)) {
|
|
if (get_timer(ts) > TIMEOUT_DRAIN_FIFO) {
|
|
dev_err(info->controller.active->mtd.dev,
|
|
"Timeout on RDDREQ while draining the FIFO\n");
|
|
return;
|
|
}
|
|
}
|
|
|
|
data += 32;
|
|
len -= 8;
|
|
}
|
|
}
|
|
|
|
readsl(info->mmio_base + NDDB, data, len);
|
|
}
|
|
|
|
static void handle_data_pio(struct pxa3xx_nand_info *info)
|
|
{
|
|
int data_len = info->step_chunk_size;
|
|
|
|
/*
|
|
* In raw mode, include the spare area and the ECC bytes that are not
|
|
* consumed by the controller in the data section. Do not reorganize
|
|
* here, do it in the ->read_page_raw() handler instead.
|
|
*/
|
|
if (info->force_raw)
|
|
data_len += info->step_spare_size + info->ecc_size;
|
|
|
|
switch (info->state) {
|
|
case STATE_PIO_WRITING:
|
|
if (info->step_chunk_size)
|
|
writesl(info->mmio_base + NDDB,
|
|
info->data_buff + info->data_buff_pos,
|
|
DIV_ROUND_UP(data_len, 4));
|
|
|
|
if (info->step_spare_size)
|
|
writesl(info->mmio_base + NDDB,
|
|
info->oob_buff + info->oob_buff_pos,
|
|
DIV_ROUND_UP(info->step_spare_size, 4));
|
|
break;
|
|
case STATE_PIO_READING:
|
|
if (data_len)
|
|
drain_fifo(info,
|
|
info->data_buff + info->data_buff_pos,
|
|
DIV_ROUND_UP(data_len, 4));
|
|
|
|
if (info->force_raw)
|
|
break;
|
|
|
|
if (info->step_spare_size)
|
|
drain_fifo(info,
|
|
info->oob_buff + info->oob_buff_pos,
|
|
DIV_ROUND_UP(info->step_spare_size, 4));
|
|
break;
|
|
default:
|
|
dev_err(info->controller.active->mtd.dev,
|
|
"%s: invalid state %d\n", __func__, info->state);
|
|
BUG();
|
|
}
|
|
|
|
/* Update buffer pointers for multi-page read/write */
|
|
info->data_buff_pos += data_len;
|
|
info->oob_buff_pos += info->step_spare_size;
|
|
}
|
|
|
|
static void pxa3xx_nand_irq_thread(struct pxa3xx_nand_info *info)
|
|
{
|
|
handle_data_pio(info);
|
|
|
|
info->state = STATE_CMD_DONE;
|
|
nand_writel(info, NDSR, NDSR_WRDREQ | NDSR_RDDREQ);
|
|
}
|
|
|
|
static irqreturn_t pxa3xx_nand_irq(struct pxa3xx_nand_info *info)
|
|
{
|
|
unsigned int status, is_completed = 0, is_ready = 0;
|
|
unsigned int ready, cmd_done;
|
|
irqreturn_t ret = IRQ_HANDLED;
|
|
|
|
if (info->cs == 0) {
|
|
ready = NDSR_FLASH_RDY;
|
|
cmd_done = NDSR_CS0_CMDD;
|
|
} else {
|
|
ready = NDSR_RDY;
|
|
cmd_done = NDSR_CS1_CMDD;
|
|
}
|
|
|
|
/* TODO - find out why we need the delay during write operation. */
|
|
ndelay(1);
|
|
|
|
status = nand_readl(info, NDSR);
|
|
|
|
if (status & NDSR_UNCORERR)
|
|
info->retcode = ERR_UNCORERR;
|
|
if (status & NDSR_CORERR) {
|
|
info->retcode = ERR_CORERR;
|
|
if ((info->variant == PXA3XX_NAND_VARIANT_ARMADA370 ||
|
|
info->variant == PXA3XX_NAND_VARIANT_ARMADA_8K) &&
|
|
info->ecc_bch)
|
|
info->ecc_err_cnt = NDSR_ERR_CNT(status);
|
|
else
|
|
info->ecc_err_cnt = 1;
|
|
|
|
/*
|
|
* Each chunk composing a page is corrected independently,
|
|
* and we need to store maximum number of corrected bitflips
|
|
* to return it to the MTD layer in ecc.read_page().
|
|
*/
|
|
info->max_bitflips = max_t(unsigned int,
|
|
info->max_bitflips,
|
|
info->ecc_err_cnt);
|
|
}
|
|
if (status & (NDSR_RDDREQ | NDSR_WRDREQ)) {
|
|
info->state = (status & NDSR_RDDREQ) ?
|
|
STATE_PIO_READING : STATE_PIO_WRITING;
|
|
/* Call the IRQ thread in U-Boot directly */
|
|
pxa3xx_nand_irq_thread(info);
|
|
return 0;
|
|
}
|
|
if (status & cmd_done) {
|
|
info->state = STATE_CMD_DONE;
|
|
is_completed = 1;
|
|
}
|
|
if (status & ready) {
|
|
info->state = STATE_READY;
|
|
is_ready = 1;
|
|
}
|
|
|
|
/*
|
|
* Clear all status bit before issuing the next command, which
|
|
* can and will alter the status bits and will deserve a new
|
|
* interrupt on its own. This lets the controller exit the IRQ
|
|
*/
|
|
nand_writel(info, NDSR, status);
|
|
|
|
if (status & NDSR_WRCMDREQ) {
|
|
status &= ~NDSR_WRCMDREQ;
|
|
info->state = STATE_CMD_HANDLE;
|
|
|
|
/*
|
|
* Command buffer registers NDCB{0-2} (and optionally NDCB3)
|
|
* must be loaded by writing directly either 12 or 16
|
|
* bytes directly to NDCB0, four bytes at a time.
|
|
*
|
|
* Direct write access to NDCB1, NDCB2 and NDCB3 is ignored
|
|
* but each NDCBx register can be read.
|
|
*/
|
|
nand_writel(info, NDCB0, info->ndcb0);
|
|
nand_writel(info, NDCB0, info->ndcb1);
|
|
nand_writel(info, NDCB0, info->ndcb2);
|
|
|
|
/* NDCB3 register is available in NFCv2 (Armada 370/XP SoC) */
|
|
if (info->variant == PXA3XX_NAND_VARIANT_ARMADA370 ||
|
|
info->variant == PXA3XX_NAND_VARIANT_ARMADA_8K)
|
|
nand_writel(info, NDCB0, info->ndcb3);
|
|
}
|
|
|
|
if (is_completed)
|
|
info->cmd_complete = 1;
|
|
if (is_ready)
|
|
info->dev_ready = 1;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline int is_buf_blank(uint8_t *buf, size_t len)
|
|
{
|
|
for (; len > 0; len--)
|
|
if (*buf++ != 0xff)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
static void set_command_address(struct pxa3xx_nand_info *info,
|
|
unsigned int page_size, uint16_t column, int page_addr)
|
|
{
|
|
/* small page addr setting */
|
|
if (page_size < info->chunk_size) {
|
|
info->ndcb1 = ((page_addr & 0xFFFFFF) << 8)
|
|
| (column & 0xFF);
|
|
|
|
info->ndcb2 = 0;
|
|
} else {
|
|
info->ndcb1 = ((page_addr & 0xFFFF) << 16)
|
|
| (column & 0xFFFF);
|
|
|
|
if (page_addr & 0xFF0000)
|
|
info->ndcb2 = (page_addr & 0xFF0000) >> 16;
|
|
else
|
|
info->ndcb2 = 0;
|
|
}
|
|
}
|
|
|
|
static void prepare_start_command(struct pxa3xx_nand_info *info, int command)
|
|
{
|
|
struct pxa3xx_nand_host *host = info->host[info->cs];
|
|
struct mtd_info *mtd = nand_to_mtd(&host->chip);
|
|
|
|
/* reset data and oob column point to handle data */
|
|
info->buf_start = 0;
|
|
info->buf_count = 0;
|
|
info->data_buff_pos = 0;
|
|
info->oob_buff_pos = 0;
|
|
info->step_chunk_size = 0;
|
|
info->step_spare_size = 0;
|
|
info->cur_chunk = 0;
|
|
info->use_ecc = 0;
|
|
info->use_spare = 1;
|
|
info->retcode = ERR_NONE;
|
|
info->ecc_err_cnt = 0;
|
|
info->ndcb3 = 0;
|
|
info->need_wait = 0;
|
|
|
|
switch (command) {
|
|
case NAND_CMD_READ0:
|
|
case NAND_CMD_READOOB:
|
|
case NAND_CMD_PAGEPROG:
|
|
if (!info->force_raw)
|
|
info->use_ecc = 1;
|
|
break;
|
|
case NAND_CMD_PARAM:
|
|
info->use_spare = 0;
|
|
break;
|
|
default:
|
|
info->ndcb1 = 0;
|
|
info->ndcb2 = 0;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* If we are about to issue a read command, or about to set
|
|
* the write address, then clean the data buffer.
|
|
*/
|
|
if (command == NAND_CMD_READ0 ||
|
|
command == NAND_CMD_READOOB ||
|
|
command == NAND_CMD_SEQIN) {
|
|
info->buf_count = mtd->writesize + mtd->oobsize;
|
|
memset(info->data_buff, 0xFF, info->buf_count);
|
|
}
|
|
}
|
|
|
|
static int prepare_set_command(struct pxa3xx_nand_info *info, int command,
|
|
int ext_cmd_type, uint16_t column, int page_addr)
|
|
{
|
|
int addr_cycle, exec_cmd;
|
|
struct pxa3xx_nand_host *host;
|
|
struct mtd_info *mtd;
|
|
|
|
host = info->host[info->cs];
|
|
mtd = nand_to_mtd(&host->chip);
|
|
addr_cycle = 0;
|
|
exec_cmd = 1;
|
|
|
|
if (info->cs != 0)
|
|
info->ndcb0 = NDCB0_CSEL;
|
|
else
|
|
info->ndcb0 = 0;
|
|
|
|
if (command == NAND_CMD_SEQIN)
|
|
exec_cmd = 0;
|
|
|
|
addr_cycle = NDCB0_ADDR_CYC(host->row_addr_cycles
|
|
+ host->col_addr_cycles);
|
|
|
|
switch (command) {
|
|
case NAND_CMD_READOOB:
|
|
case NAND_CMD_READ0:
|
|
info->buf_start = column;
|
|
info->ndcb0 |= NDCB0_CMD_TYPE(0)
|
|
| addr_cycle
|
|
| NAND_CMD_READ0;
|
|
|
|
if (command == NAND_CMD_READOOB)
|
|
info->buf_start += mtd->writesize;
|
|
|
|
if (info->cur_chunk < info->nfullchunks) {
|
|
info->step_chunk_size = info->chunk_size;
|
|
info->step_spare_size = info->spare_size;
|
|
} else {
|
|
info->step_chunk_size = info->last_chunk_size;
|
|
info->step_spare_size = info->last_spare_size;
|
|
}
|
|
|
|
/*
|
|
* Multiple page read needs an 'extended command type' field,
|
|
* which is either naked-read or last-read according to the
|
|
* state.
|
|
*/
|
|
if (info->force_raw) {
|
|
info->ndcb0 |= NDCB0_DBC | (NAND_CMD_READSTART << 8) |
|
|
NDCB0_LEN_OVRD |
|
|
NDCB0_EXT_CMD_TYPE(ext_cmd_type);
|
|
info->ndcb3 = info->step_chunk_size +
|
|
info->step_spare_size + info->ecc_size;
|
|
} else if (mtd->writesize == info->chunk_size) {
|
|
info->ndcb0 |= NDCB0_DBC | (NAND_CMD_READSTART << 8);
|
|
} else if (mtd->writesize > info->chunk_size) {
|
|
info->ndcb0 |= NDCB0_DBC | (NAND_CMD_READSTART << 8)
|
|
| NDCB0_LEN_OVRD
|
|
| NDCB0_EXT_CMD_TYPE(ext_cmd_type);
|
|
info->ndcb3 = info->step_chunk_size +
|
|
info->step_spare_size;
|
|
}
|
|
|
|
set_command_address(info, mtd->writesize, column, page_addr);
|
|
break;
|
|
|
|
case NAND_CMD_SEQIN:
|
|
|
|
info->buf_start = column;
|
|
set_command_address(info, mtd->writesize, 0, page_addr);
|
|
|
|
/*
|
|
* Multiple page programming needs to execute the initial
|
|
* SEQIN command that sets the page address.
|
|
*/
|
|
if (mtd->writesize > info->chunk_size) {
|
|
info->ndcb0 |= NDCB0_CMD_TYPE(0x1)
|
|
| NDCB0_EXT_CMD_TYPE(ext_cmd_type)
|
|
| addr_cycle
|
|
| command;
|
|
exec_cmd = 1;
|
|
}
|
|
break;
|
|
|
|
case NAND_CMD_PAGEPROG:
|
|
if (is_buf_blank(info->data_buff,
|
|
(mtd->writesize + mtd->oobsize))) {
|
|
exec_cmd = 0;
|
|
break;
|
|
}
|
|
|
|
if (info->cur_chunk < info->nfullchunks) {
|
|
info->step_chunk_size = info->chunk_size;
|
|
info->step_spare_size = info->spare_size;
|
|
} else {
|
|
info->step_chunk_size = info->last_chunk_size;
|
|
info->step_spare_size = info->last_spare_size;
|
|
}
|
|
|
|
/* Second command setting for large pages */
|
|
if (mtd->writesize > info->chunk_size) {
|
|
/*
|
|
* Multiple page write uses the 'extended command'
|
|
* field. This can be used to issue a command dispatch
|
|
* or a naked-write depending on the current stage.
|
|
*/
|
|
info->ndcb0 |= NDCB0_CMD_TYPE(0x1)
|
|
| NDCB0_LEN_OVRD
|
|
| NDCB0_EXT_CMD_TYPE(ext_cmd_type);
|
|
info->ndcb3 = info->step_chunk_size +
|
|
info->step_spare_size;
|
|
|
|
/*
|
|
* This is the command dispatch that completes a chunked
|
|
* page program operation.
|
|
*/
|
|
if (info->cur_chunk == info->ntotalchunks) {
|
|
info->ndcb0 = NDCB0_CMD_TYPE(0x1)
|
|
| NDCB0_EXT_CMD_TYPE(ext_cmd_type)
|
|
| command;
|
|
info->ndcb1 = 0;
|
|
info->ndcb2 = 0;
|
|
info->ndcb3 = 0;
|
|
}
|
|
} else {
|
|
info->ndcb0 |= NDCB0_CMD_TYPE(0x1)
|
|
| NDCB0_AUTO_RS
|
|
| NDCB0_ST_ROW_EN
|
|
| NDCB0_DBC
|
|
| (NAND_CMD_PAGEPROG << 8)
|
|
| NAND_CMD_SEQIN
|
|
| addr_cycle;
|
|
}
|
|
break;
|
|
|
|
case NAND_CMD_PARAM:
|
|
info->buf_count = INIT_BUFFER_SIZE;
|
|
info->ndcb0 |= NDCB0_CMD_TYPE(0)
|
|
| NDCB0_ADDR_CYC(1)
|
|
| NDCB0_LEN_OVRD
|
|
| command;
|
|
info->ndcb1 = (column & 0xFF);
|
|
info->ndcb3 = INIT_BUFFER_SIZE;
|
|
info->step_chunk_size = INIT_BUFFER_SIZE;
|
|
break;
|
|
|
|
case NAND_CMD_READID:
|
|
info->buf_count = READ_ID_BYTES;
|
|
info->ndcb0 |= NDCB0_CMD_TYPE(3)
|
|
| NDCB0_ADDR_CYC(1)
|
|
| command;
|
|
info->ndcb1 = (column & 0xFF);
|
|
|
|
info->step_chunk_size = 8;
|
|
break;
|
|
case NAND_CMD_STATUS:
|
|
info->buf_count = 1;
|
|
info->ndcb0 |= NDCB0_CMD_TYPE(4)
|
|
| NDCB0_ADDR_CYC(1)
|
|
| command;
|
|
|
|
info->step_chunk_size = 8;
|
|
break;
|
|
|
|
case NAND_CMD_ERASE1:
|
|
info->ndcb0 |= NDCB0_CMD_TYPE(2)
|
|
| NDCB0_AUTO_RS
|
|
| NDCB0_ADDR_CYC(3)
|
|
| NDCB0_DBC
|
|
| (NAND_CMD_ERASE2 << 8)
|
|
| NAND_CMD_ERASE1;
|
|
info->ndcb1 = page_addr;
|
|
info->ndcb2 = 0;
|
|
|
|
break;
|
|
case NAND_CMD_RESET:
|
|
info->ndcb0 |= NDCB0_CMD_TYPE(5)
|
|
| command;
|
|
|
|
break;
|
|
|
|
case NAND_CMD_ERASE2:
|
|
exec_cmd = 0;
|
|
break;
|
|
|
|
default:
|
|
exec_cmd = 0;
|
|
dev_err(mtd->dev, "non-supported command %x\n",
|
|
command);
|
|
break;
|
|
}
|
|
|
|
return exec_cmd;
|
|
}
|
|
|
|
static void nand_cmdfunc(struct mtd_info *mtd, unsigned command,
|
|
int column, int page_addr)
|
|
{
|
|
struct nand_chip *chip = mtd_to_nand(mtd);
|
|
struct pxa3xx_nand_host *host = nand_get_controller_data(chip);
|
|
struct pxa3xx_nand_info *info = host->info_data;
|
|
int exec_cmd;
|
|
|
|
/*
|
|
* if this is a x16 device ,then convert the input
|
|
* "byte" address into a "word" address appropriate
|
|
* for indexing a word-oriented device
|
|
*/
|
|
if (info->reg_ndcr & NDCR_DWIDTH_M)
|
|
column /= 2;
|
|
|
|
/*
|
|
* There may be different NAND chip hooked to
|
|
* different chip select, so check whether
|
|
* chip select has been changed, if yes, reset the timing
|
|
*/
|
|
if (info->cs != host->cs) {
|
|
info->cs = host->cs;
|
|
nand_writel(info, NDTR0CS0, info->ndtr0cs0);
|
|
nand_writel(info, NDTR1CS0, info->ndtr1cs0);
|
|
}
|
|
|
|
prepare_start_command(info, command);
|
|
|
|
info->state = STATE_PREPARED;
|
|
exec_cmd = prepare_set_command(info, command, 0, column, page_addr);
|
|
|
|
if (exec_cmd) {
|
|
u32 ts;
|
|
|
|
info->cmd_complete = 0;
|
|
info->dev_ready = 0;
|
|
info->need_wait = 1;
|
|
pxa3xx_nand_start(info);
|
|
|
|
ts = get_timer(0);
|
|
while (1) {
|
|
u32 status;
|
|
|
|
status = nand_readl(info, NDSR);
|
|
if (status)
|
|
pxa3xx_nand_irq(info);
|
|
|
|
if (info->cmd_complete)
|
|
break;
|
|
|
|
if (get_timer(ts) > CHIP_DELAY_TIMEOUT) {
|
|
dev_err(mtd->dev, "Wait timeout!!!\n");
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
info->state = STATE_IDLE;
|
|
}
|
|
|
|
static void nand_cmdfunc_extended(struct mtd_info *mtd,
|
|
const unsigned command,
|
|
int column, int page_addr)
|
|
{
|
|
struct nand_chip *chip = mtd_to_nand(mtd);
|
|
struct pxa3xx_nand_host *host = nand_get_controller_data(chip);
|
|
struct pxa3xx_nand_info *info = host->info_data;
|
|
int exec_cmd, ext_cmd_type;
|
|
|
|
/*
|
|
* if this is a x16 device then convert the input
|
|
* "byte" address into a "word" address appropriate
|
|
* for indexing a word-oriented device
|
|
*/
|
|
if (info->reg_ndcr & NDCR_DWIDTH_M)
|
|
column /= 2;
|
|
|
|
/*
|
|
* There may be different NAND chip hooked to
|
|
* different chip select, so check whether
|
|
* chip select has been changed, if yes, reset the timing
|
|
*/
|
|
if (info->cs != host->cs) {
|
|
info->cs = host->cs;
|
|
nand_writel(info, NDTR0CS0, info->ndtr0cs0);
|
|
nand_writel(info, NDTR1CS0, info->ndtr1cs0);
|
|
}
|
|
|
|
/* Select the extended command for the first command */
|
|
switch (command) {
|
|
case NAND_CMD_READ0:
|
|
case NAND_CMD_READOOB:
|
|
ext_cmd_type = EXT_CMD_TYPE_MONO;
|
|
break;
|
|
case NAND_CMD_SEQIN:
|
|
ext_cmd_type = EXT_CMD_TYPE_DISPATCH;
|
|
break;
|
|
case NAND_CMD_PAGEPROG:
|
|
ext_cmd_type = EXT_CMD_TYPE_NAKED_RW;
|
|
break;
|
|
default:
|
|
ext_cmd_type = 0;
|
|
break;
|
|
}
|
|
|
|
prepare_start_command(info, command);
|
|
|
|
/*
|
|
* Prepare the "is ready" completion before starting a command
|
|
* transaction sequence. If the command is not executed the
|
|
* completion will be completed, see below.
|
|
*
|
|
* We can do that inside the loop because the command variable
|
|
* is invariant and thus so is the exec_cmd.
|
|
*/
|
|
info->need_wait = 1;
|
|
info->dev_ready = 0;
|
|
|
|
do {
|
|
u32 ts;
|
|
|
|
info->state = STATE_PREPARED;
|
|
exec_cmd = prepare_set_command(info, command, ext_cmd_type,
|
|
column, page_addr);
|
|
if (!exec_cmd) {
|
|
info->need_wait = 0;
|
|
info->dev_ready = 1;
|
|
break;
|
|
}
|
|
|
|
info->cmd_complete = 0;
|
|
pxa3xx_nand_start(info);
|
|
|
|
ts = get_timer(0);
|
|
while (1) {
|
|
u32 status;
|
|
|
|
status = nand_readl(info, NDSR);
|
|
if (status)
|
|
pxa3xx_nand_irq(info);
|
|
|
|
if (info->cmd_complete)
|
|
break;
|
|
|
|
if (get_timer(ts) > CHIP_DELAY_TIMEOUT) {
|
|
dev_err(mtd->dev, "Wait timeout!!!\n");
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* Only a few commands need several steps */
|
|
if (command != NAND_CMD_PAGEPROG &&
|
|
command != NAND_CMD_READ0 &&
|
|
command != NAND_CMD_READOOB)
|
|
break;
|
|
|
|
info->cur_chunk++;
|
|
|
|
/* Check if the sequence is complete */
|
|
if (info->cur_chunk == info->ntotalchunks &&
|
|
command != NAND_CMD_PAGEPROG)
|
|
break;
|
|
|
|
/*
|
|
* After a splitted program command sequence has issued
|
|
* the command dispatch, the command sequence is complete.
|
|
*/
|
|
if (info->cur_chunk == (info->ntotalchunks + 1) &&
|
|
command == NAND_CMD_PAGEPROG &&
|
|
ext_cmd_type == EXT_CMD_TYPE_DISPATCH)
|
|
break;
|
|
|
|
if (command == NAND_CMD_READ0 || command == NAND_CMD_READOOB) {
|
|
/* Last read: issue a 'last naked read' */
|
|
if (info->cur_chunk == info->ntotalchunks - 1)
|
|
ext_cmd_type = EXT_CMD_TYPE_LAST_RW;
|
|
else
|
|
ext_cmd_type = EXT_CMD_TYPE_NAKED_RW;
|
|
|
|
/*
|
|
* If a splitted program command has no more data to transfer,
|
|
* the command dispatch must be issued to complete.
|
|
*/
|
|
} else if (command == NAND_CMD_PAGEPROG &&
|
|
info->cur_chunk == info->ntotalchunks) {
|
|
ext_cmd_type = EXT_CMD_TYPE_DISPATCH;
|
|
}
|
|
} while (1);
|
|
|
|
info->state = STATE_IDLE;
|
|
}
|
|
|
|
static int pxa3xx_nand_write_page_hwecc(struct mtd_info *mtd,
|
|
struct nand_chip *chip, const uint8_t *buf, int oob_required,
|
|
int page)
|
|
{
|
|
chip->write_buf(mtd, buf, mtd->writesize);
|
|
chip->write_buf(mtd, chip->oob_poi, mtd->oobsize);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pxa3xx_nand_read_page_hwecc(struct mtd_info *mtd,
|
|
struct nand_chip *chip, uint8_t *buf, int oob_required,
|
|
int page)
|
|
{
|
|
struct pxa3xx_nand_host *host = nand_get_controller_data(chip);
|
|
struct pxa3xx_nand_info *info = host->info_data;
|
|
int bf;
|
|
|
|
chip->read_buf(mtd, buf, mtd->writesize);
|
|
chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
|
|
|
|
if (info->retcode == ERR_CORERR && info->use_ecc) {
|
|
mtd->ecc_stats.corrected += info->ecc_err_cnt;
|
|
|
|
} else if (info->retcode == ERR_UNCORERR && info->ecc_bch) {
|
|
/*
|
|
* Empty pages will trigger uncorrectable errors. Re-read the
|
|
* entire page in raw mode and check for bits not being "1".
|
|
* If there are more than the supported strength, then it means
|
|
* this is an actual uncorrectable error.
|
|
*/
|
|
chip->ecc.read_page_raw(mtd, chip, buf, oob_required, page);
|
|
bf = nand_check_erased_ecc_chunk(buf, mtd->writesize,
|
|
chip->oob_poi, mtd->oobsize,
|
|
NULL, 0, chip->ecc.strength);
|
|
if (bf < 0) {
|
|
mtd->ecc_stats.failed++;
|
|
} else if (bf) {
|
|
mtd->ecc_stats.corrected += bf;
|
|
info->max_bitflips = max_t(unsigned int,
|
|
info->max_bitflips, bf);
|
|
info->retcode = ERR_CORERR;
|
|
} else {
|
|
info->retcode = ERR_NONE;
|
|
}
|
|
|
|
} else if (info->retcode == ERR_UNCORERR && !info->ecc_bch) {
|
|
/* Raw read is not supported with Hamming ECC engine */
|
|
if (is_buf_blank(buf, mtd->writesize))
|
|
info->retcode = ERR_NONE;
|
|
else
|
|
mtd->ecc_stats.failed++;
|
|
}
|
|
|
|
return info->max_bitflips;
|
|
}
|
|
|
|
static int pxa3xx_nand_read_page_raw(struct mtd_info *mtd,
|
|
struct nand_chip *chip, uint8_t *buf,
|
|
int oob_required, int page)
|
|
{
|
|
struct pxa3xx_nand_host *host = chip->priv;
|
|
struct pxa3xx_nand_info *info = host->info_data;
|
|
int chunk, ecc_off_buf;
|
|
|
|
if (!info->ecc_bch)
|
|
return -ENOTSUPP;
|
|
|
|
/*
|
|
* Set the force_raw boolean, then re-call ->cmdfunc() that will run
|
|
* pxa3xx_nand_start(), which will actually disable the ECC engine.
|
|
*/
|
|
info->force_raw = true;
|
|
chip->cmdfunc(mtd, NAND_CMD_READ0, 0x00, page);
|
|
|
|
ecc_off_buf = (info->nfullchunks * info->spare_size) +
|
|
info->last_spare_size;
|
|
for (chunk = 0; chunk < info->nfullchunks; chunk++) {
|
|
chip->read_buf(mtd,
|
|
buf + (chunk * info->chunk_size),
|
|
info->chunk_size);
|
|
chip->read_buf(mtd,
|
|
chip->oob_poi +
|
|
(chunk * (info->spare_size)),
|
|
info->spare_size);
|
|
chip->read_buf(mtd,
|
|
chip->oob_poi + ecc_off_buf +
|
|
(chunk * (info->ecc_size)),
|
|
info->ecc_size - 2);
|
|
}
|
|
|
|
if (info->ntotalchunks > info->nfullchunks) {
|
|
chip->read_buf(mtd,
|
|
buf + (info->nfullchunks * info->chunk_size),
|
|
info->last_chunk_size);
|
|
chip->read_buf(mtd,
|
|
chip->oob_poi +
|
|
(info->nfullchunks * (info->spare_size)),
|
|
info->last_spare_size);
|
|
chip->read_buf(mtd,
|
|
chip->oob_poi + ecc_off_buf +
|
|
(info->nfullchunks * (info->ecc_size)),
|
|
info->ecc_size - 2);
|
|
}
|
|
|
|
info->force_raw = false;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pxa3xx_nand_read_oob_raw(struct mtd_info *mtd,
|
|
struct nand_chip *chip, int page)
|
|
{
|
|
/* Invalidate page cache */
|
|
chip->pagebuf = -1;
|
|
|
|
return chip->ecc.read_page_raw(mtd, chip, chip->buffers->databuf, true,
|
|
page);
|
|
}
|
|
|
|
static uint8_t pxa3xx_nand_read_byte(struct mtd_info *mtd)
|
|
{
|
|
struct nand_chip *chip = mtd_to_nand(mtd);
|
|
struct pxa3xx_nand_host *host = nand_get_controller_data(chip);
|
|
struct pxa3xx_nand_info *info = host->info_data;
|
|
char retval = 0xFF;
|
|
|
|
if (info->buf_start < info->buf_count)
|
|
/* Has just send a new command? */
|
|
retval = info->data_buff[info->buf_start++];
|
|
|
|
return retval;
|
|
}
|
|
|
|
static u16 pxa3xx_nand_read_word(struct mtd_info *mtd)
|
|
{
|
|
struct nand_chip *chip = mtd_to_nand(mtd);
|
|
struct pxa3xx_nand_host *host = nand_get_controller_data(chip);
|
|
struct pxa3xx_nand_info *info = host->info_data;
|
|
u16 retval = 0xFFFF;
|
|
|
|
if (!(info->buf_start & 0x01) && info->buf_start < info->buf_count) {
|
|
retval = *((u16 *)(info->data_buff+info->buf_start));
|
|
info->buf_start += 2;
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
static void pxa3xx_nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
|
|
{
|
|
struct nand_chip *chip = mtd_to_nand(mtd);
|
|
struct pxa3xx_nand_host *host = nand_get_controller_data(chip);
|
|
struct pxa3xx_nand_info *info = host->info_data;
|
|
int real_len = min_t(size_t, len, info->buf_count - info->buf_start);
|
|
|
|
memcpy(buf, info->data_buff + info->buf_start, real_len);
|
|
info->buf_start += real_len;
|
|
}
|
|
|
|
static void pxa3xx_nand_write_buf(struct mtd_info *mtd,
|
|
const uint8_t *buf, int len)
|
|
{
|
|
struct nand_chip *chip = mtd_to_nand(mtd);
|
|
struct pxa3xx_nand_host *host = nand_get_controller_data(chip);
|
|
struct pxa3xx_nand_info *info = host->info_data;
|
|
int real_len = min_t(size_t, len, info->buf_count - info->buf_start);
|
|
|
|
memcpy(info->data_buff + info->buf_start, buf, real_len);
|
|
info->buf_start += real_len;
|
|
}
|
|
|
|
static void pxa3xx_nand_select_chip(struct mtd_info *mtd, int chip)
|
|
{
|
|
return;
|
|
}
|
|
|
|
static int pxa3xx_nand_waitfunc(struct mtd_info *mtd, struct nand_chip *this)
|
|
{
|
|
struct nand_chip *chip = mtd_to_nand(mtd);
|
|
struct pxa3xx_nand_host *host = nand_get_controller_data(chip);
|
|
struct pxa3xx_nand_info *info = host->info_data;
|
|
|
|
if (info->need_wait) {
|
|
u32 ts;
|
|
|
|
info->need_wait = 0;
|
|
|
|
ts = get_timer(0);
|
|
while (1) {
|
|
u32 status;
|
|
|
|
status = nand_readl(info, NDSR);
|
|
if (status)
|
|
pxa3xx_nand_irq(info);
|
|
|
|
if (info->dev_ready)
|
|
break;
|
|
|
|
if (get_timer(ts) > CHIP_DELAY_TIMEOUT) {
|
|
dev_err(mtd->dev, "Ready timeout!!!\n");
|
|
return NAND_STATUS_FAIL;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* pxa3xx_nand_send_command has waited for command complete */
|
|
if (this->state == FL_WRITING || this->state == FL_ERASING) {
|
|
if (info->retcode == ERR_NONE)
|
|
return 0;
|
|
else
|
|
return NAND_STATUS_FAIL;
|
|
}
|
|
|
|
return NAND_STATUS_READY;
|
|
}
|
|
|
|
static int pxa3xx_nand_config_ident(struct pxa3xx_nand_info *info)
|
|
{
|
|
struct pxa3xx_nand_platform_data *pdata = info->pdata;
|
|
|
|
/* Configure default flash values */
|
|
info->reg_ndcr = 0x0; /* enable all interrupts */
|
|
info->reg_ndcr |= (pdata->enable_arbiter) ? NDCR_ND_ARB_EN : 0;
|
|
info->reg_ndcr |= NDCR_RD_ID_CNT(READ_ID_BYTES);
|
|
info->reg_ndcr |= NDCR_SPARE_EN;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void pxa3xx_nand_config_tail(struct pxa3xx_nand_info *info)
|
|
{
|
|
struct pxa3xx_nand_host *host = info->host[info->cs];
|
|
struct mtd_info *mtd = nand_to_mtd(&info->host[info->cs]->chip);
|
|
struct nand_chip *chip = mtd_to_nand(mtd);
|
|
|
|
info->reg_ndcr |= (host->col_addr_cycles == 2) ? NDCR_RA_START : 0;
|
|
info->reg_ndcr |= (chip->page_shift == 6) ? NDCR_PG_PER_BLK : 0;
|
|
info->reg_ndcr |= (mtd->writesize == 2048) ? NDCR_PAGE_SZ : 0;
|
|
}
|
|
|
|
static void pxa3xx_nand_detect_config(struct pxa3xx_nand_info *info)
|
|
{
|
|
struct pxa3xx_nand_platform_data *pdata = info->pdata;
|
|
uint32_t ndcr = nand_readl(info, NDCR);
|
|
|
|
/* Set an initial chunk size */
|
|
info->chunk_size = ndcr & NDCR_PAGE_SZ ? 2048 : 512;
|
|
info->reg_ndcr = ndcr &
|
|
~(NDCR_INT_MASK | NDCR_ND_ARB_EN | NFCV1_NDCR_ARB_CNTL);
|
|
info->reg_ndcr |= (pdata->enable_arbiter) ? NDCR_ND_ARB_EN : 0;
|
|
info->ndtr0cs0 = nand_readl(info, NDTR0CS0);
|
|
info->ndtr1cs0 = nand_readl(info, NDTR1CS0);
|
|
}
|
|
|
|
static int pxa3xx_nand_init_buff(struct pxa3xx_nand_info *info)
|
|
{
|
|
info->data_buff = kmalloc(info->buf_size, GFP_KERNEL);
|
|
if (info->data_buff == NULL)
|
|
return -ENOMEM;
|
|
return 0;
|
|
}
|
|
|
|
static int pxa3xx_nand_sensing(struct pxa3xx_nand_host *host)
|
|
{
|
|
struct pxa3xx_nand_info *info = host->info_data;
|
|
struct pxa3xx_nand_platform_data *pdata = info->pdata;
|
|
struct mtd_info *mtd;
|
|
struct nand_chip *chip;
|
|
const struct nand_sdr_timings *timings;
|
|
int ret;
|
|
|
|
mtd = nand_to_mtd(&info->host[info->cs]->chip);
|
|
chip = mtd_to_nand(mtd);
|
|
|
|
/* configure default flash values */
|
|
info->reg_ndcr = 0x0; /* enable all interrupts */
|
|
info->reg_ndcr |= (pdata->enable_arbiter) ? NDCR_ND_ARB_EN : 0;
|
|
info->reg_ndcr |= NDCR_RD_ID_CNT(READ_ID_BYTES);
|
|
info->reg_ndcr |= NDCR_SPARE_EN; /* enable spare by default */
|
|
|
|
/* use the common timing to make a try */
|
|
timings = onfi_async_timing_mode_to_sdr_timings(0);
|
|
if (IS_ERR(timings))
|
|
return PTR_ERR(timings);
|
|
|
|
pxa3xx_nand_set_sdr_timing(host, timings);
|
|
|
|
chip->cmdfunc(mtd, NAND_CMD_RESET, 0, 0);
|
|
ret = chip->waitfunc(mtd, chip);
|
|
if (ret & NAND_STATUS_FAIL)
|
|
return -ENODEV;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pxa_ecc_init(struct pxa3xx_nand_info *info,
|
|
struct nand_ecc_ctrl *ecc,
|
|
int strength, int ecc_stepsize, int page_size)
|
|
{
|
|
if (strength == 1 && ecc_stepsize == 512 && page_size == 2048) {
|
|
info->nfullchunks = 1;
|
|
info->ntotalchunks = 1;
|
|
info->chunk_size = 2048;
|
|
info->spare_size = 40;
|
|
info->ecc_size = 24;
|
|
ecc->mode = NAND_ECC_HW;
|
|
ecc->size = 512;
|
|
ecc->strength = 1;
|
|
|
|
} else if (strength == 1 && ecc_stepsize == 512 && page_size == 512) {
|
|
info->nfullchunks = 1;
|
|
info->ntotalchunks = 1;
|
|
info->chunk_size = 512;
|
|
info->spare_size = 8;
|
|
info->ecc_size = 8;
|
|
ecc->mode = NAND_ECC_HW;
|
|
ecc->size = 512;
|
|
ecc->strength = 1;
|
|
|
|
/*
|
|
* Required ECC: 4-bit correction per 512 bytes
|
|
* Select: 16-bit correction per 2048 bytes
|
|
*/
|
|
} else if (strength == 4 && ecc_stepsize == 512 && page_size == 2048) {
|
|
info->ecc_bch = 1;
|
|
info->nfullchunks = 1;
|
|
info->ntotalchunks = 1;
|
|
info->chunk_size = 2048;
|
|
info->spare_size = 32;
|
|
info->ecc_size = 32;
|
|
ecc->mode = NAND_ECC_HW;
|
|
ecc->size = info->chunk_size;
|
|
ecc->layout = &ecc_layout_2KB_bch4bit;
|
|
ecc->strength = 16;
|
|
|
|
} else if (strength == 4 && ecc_stepsize == 512 && page_size == 4096) {
|
|
info->ecc_bch = 1;
|
|
info->nfullchunks = 2;
|
|
info->ntotalchunks = 2;
|
|
info->chunk_size = 2048;
|
|
info->spare_size = 32;
|
|
info->ecc_size = 32;
|
|
ecc->mode = NAND_ECC_HW;
|
|
ecc->size = info->chunk_size;
|
|
ecc->layout = &ecc_layout_4KB_bch4bit;
|
|
ecc->strength = 16;
|
|
|
|
} else if (strength == 4 && ecc_stepsize == 512 && page_size == 8192) {
|
|
info->ecc_bch = 1;
|
|
info->nfullchunks = 4;
|
|
info->ntotalchunks = 4;
|
|
info->chunk_size = 2048;
|
|
info->spare_size = 32;
|
|
info->ecc_size = 32;
|
|
ecc->mode = NAND_ECC_HW;
|
|
ecc->size = info->chunk_size;
|
|
ecc->layout = &ecc_layout_8KB_bch4bit;
|
|
ecc->strength = 16;
|
|
|
|
/*
|
|
* Required ECC: 8-bit correction per 512 bytes
|
|
* Select: 16-bit correction per 1024 bytes
|
|
*/
|
|
} else if (strength == 8 && ecc_stepsize == 512 && page_size == 2048) {
|
|
info->ecc_bch = 1;
|
|
info->nfullchunks = 1;
|
|
info->ntotalchunks = 2;
|
|
info->chunk_size = 1024;
|
|
info->spare_size = 0;
|
|
info->last_chunk_size = 1024;
|
|
info->last_spare_size = 32;
|
|
info->ecc_size = 32;
|
|
ecc->mode = NAND_ECC_HW;
|
|
ecc->size = info->chunk_size;
|
|
ecc->layout = &ecc_layout_2KB_bch8bit;
|
|
ecc->strength = 16;
|
|
|
|
} else if (strength == 8 && ecc_stepsize == 512 && page_size == 4096) {
|
|
info->ecc_bch = 1;
|
|
info->nfullchunks = 4;
|
|
info->ntotalchunks = 5;
|
|
info->chunk_size = 1024;
|
|
info->spare_size = 0;
|
|
info->last_chunk_size = 0;
|
|
info->last_spare_size = 64;
|
|
info->ecc_size = 32;
|
|
ecc->mode = NAND_ECC_HW;
|
|
ecc->size = info->chunk_size;
|
|
ecc->layout = &ecc_layout_4KB_bch8bit;
|
|
ecc->strength = 16;
|
|
|
|
} else if (strength == 8 && ecc_stepsize == 512 && page_size == 8192) {
|
|
info->ecc_bch = 1;
|
|
info->nfullchunks = 8;
|
|
info->ntotalchunks = 9;
|
|
info->chunk_size = 1024;
|
|
info->spare_size = 0;
|
|
info->last_chunk_size = 0;
|
|
info->last_spare_size = 160;
|
|
info->ecc_size = 32;
|
|
ecc->mode = NAND_ECC_HW;
|
|
ecc->size = info->chunk_size;
|
|
ecc->layout = &ecc_layout_8KB_bch8bit;
|
|
ecc->strength = 16;
|
|
|
|
} else {
|
|
dev_err(info->controller.active->mtd.dev,
|
|
"ECC strength %d at page size %d is not supported\n",
|
|
strength, page_size);
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pxa3xx_nand_scan(struct mtd_info *mtd)
|
|
{
|
|
struct nand_chip *chip = mtd_to_nand(mtd);
|
|
struct pxa3xx_nand_host *host = nand_get_controller_data(chip);
|
|
struct pxa3xx_nand_info *info = host->info_data;
|
|
struct pxa3xx_nand_platform_data *pdata = info->pdata;
|
|
int ret;
|
|
uint16_t ecc_strength, ecc_step;
|
|
|
|
if (pdata->keep_config) {
|
|
pxa3xx_nand_detect_config(info);
|
|
} else {
|
|
ret = pxa3xx_nand_config_ident(info);
|
|
if (ret)
|
|
return ret;
|
|
ret = pxa3xx_nand_sensing(host);
|
|
if (ret) {
|
|
dev_info(mtd->dev, "There is no chip on cs %d!\n",
|
|
info->cs);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* Device detection must be done with ECC disabled */
|
|
if (info->variant == PXA3XX_NAND_VARIANT_ARMADA370 ||
|
|
info->variant == PXA3XX_NAND_VARIANT_ARMADA_8K)
|
|
nand_writel(info, NDECCCTRL, 0x0);
|
|
|
|
if (nand_scan_ident(mtd, 1, NULL))
|
|
return -ENODEV;
|
|
|
|
if (!pdata->keep_config) {
|
|
ret = pxa3xx_nand_init_timings(host);
|
|
if (ret) {
|
|
dev_err(mtd->dev,
|
|
"Failed to set timings: %d\n", ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_SYS_NAND_USE_FLASH_BBT
|
|
/*
|
|
* We'll use a bad block table stored in-flash and don't
|
|
* allow writing the bad block marker to the flash.
|
|
*/
|
|
chip->bbt_options |= NAND_BBT_USE_FLASH | NAND_BBT_NO_OOB_BBM;
|
|
chip->bbt_td = &bbt_main_descr;
|
|
chip->bbt_md = &bbt_mirror_descr;
|
|
#endif
|
|
|
|
if (pdata->ecc_strength && pdata->ecc_step_size) {
|
|
ecc_strength = pdata->ecc_strength;
|
|
ecc_step = pdata->ecc_step_size;
|
|
} else {
|
|
ecc_strength = chip->ecc_strength_ds;
|
|
ecc_step = chip->ecc_step_ds;
|
|
}
|
|
|
|
/* Set default ECC strength requirements on non-ONFI devices */
|
|
if (ecc_strength < 1 && ecc_step < 1) {
|
|
ecc_strength = 1;
|
|
ecc_step = 512;
|
|
}
|
|
|
|
ret = pxa_ecc_init(info, &chip->ecc, ecc_strength,
|
|
ecc_step, mtd->writesize);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/*
|
|
* If the page size is bigger than the FIFO size, let's check
|
|
* we are given the right variant and then switch to the extended
|
|
* (aka split) command handling,
|
|
*/
|
|
if (mtd->writesize > info->chunk_size) {
|
|
if (info->variant == PXA3XX_NAND_VARIANT_ARMADA370 ||
|
|
info->variant == PXA3XX_NAND_VARIANT_ARMADA_8K) {
|
|
chip->cmdfunc = nand_cmdfunc_extended;
|
|
} else {
|
|
dev_err(mtd->dev,
|
|
"unsupported page size on this variant\n");
|
|
return -ENODEV;
|
|
}
|
|
}
|
|
|
|
/* calculate addressing information */
|
|
if (mtd->writesize >= 2048)
|
|
host->col_addr_cycles = 2;
|
|
else
|
|
host->col_addr_cycles = 1;
|
|
|
|
/* release the initial buffer */
|
|
kfree(info->data_buff);
|
|
|
|
/* allocate the real data + oob buffer */
|
|
info->buf_size = mtd->writesize + mtd->oobsize;
|
|
ret = pxa3xx_nand_init_buff(info);
|
|
if (ret)
|
|
return ret;
|
|
info->oob_buff = info->data_buff + mtd->writesize;
|
|
|
|
if ((mtd->size >> chip->page_shift) > 65536)
|
|
host->row_addr_cycles = 3;
|
|
else
|
|
host->row_addr_cycles = 2;
|
|
|
|
if (!pdata->keep_config)
|
|
pxa3xx_nand_config_tail(info);
|
|
|
|
return nand_scan_tail(mtd);
|
|
}
|
|
|
|
static int alloc_nand_resource(struct udevice *dev, struct pxa3xx_nand_info *info)
|
|
{
|
|
struct pxa3xx_nand_platform_data *pdata;
|
|
struct pxa3xx_nand_host *host;
|
|
struct nand_chip *chip = NULL;
|
|
struct mtd_info *mtd;
|
|
int cs;
|
|
|
|
pdata = info->pdata;
|
|
if (pdata->num_cs <= 0)
|
|
return -ENODEV;
|
|
|
|
info->variant = pxa3xx_nand_get_variant(dev);
|
|
for (cs = 0; cs < pdata->num_cs; cs++) {
|
|
chip = (struct nand_chip *)
|
|
((u8 *)&info[1] + sizeof(*host) * cs);
|
|
mtd = nand_to_mtd(chip);
|
|
host = (struct pxa3xx_nand_host *)chip;
|
|
info->host[cs] = host;
|
|
host->cs = cs;
|
|
host->info_data = info;
|
|
mtd->owner = THIS_MODULE;
|
|
|
|
nand_set_controller_data(chip, host);
|
|
chip->ecc.read_page = pxa3xx_nand_read_page_hwecc;
|
|
chip->ecc.read_page_raw = pxa3xx_nand_read_page_raw;
|
|
chip->ecc.read_oob_raw = pxa3xx_nand_read_oob_raw;
|
|
chip->ecc.write_page = pxa3xx_nand_write_page_hwecc;
|
|
chip->controller = &info->controller;
|
|
chip->waitfunc = pxa3xx_nand_waitfunc;
|
|
chip->select_chip = pxa3xx_nand_select_chip;
|
|
chip->read_word = pxa3xx_nand_read_word;
|
|
chip->read_byte = pxa3xx_nand_read_byte;
|
|
chip->read_buf = pxa3xx_nand_read_buf;
|
|
chip->write_buf = pxa3xx_nand_write_buf;
|
|
chip->options |= NAND_NO_SUBPAGE_WRITE;
|
|
chip->cmdfunc = nand_cmdfunc;
|
|
}
|
|
|
|
/* Allocate a buffer to allow flash detection */
|
|
info->buf_size = INIT_BUFFER_SIZE;
|
|
info->data_buff = kmalloc(info->buf_size, GFP_KERNEL);
|
|
if (info->data_buff == NULL)
|
|
return -ENOMEM;
|
|
|
|
/* initialize all interrupts to be disabled */
|
|
disable_int(info, NDSR_MASK);
|
|
|
|
/*
|
|
* Some SoCs like A7k/A8k need to enable manually the NAND
|
|
* controller to avoid being bootloader dependent. This is done
|
|
* through the use of a single bit in the System Functions registers.
|
|
*/
|
|
if (pxa3xx_nand_get_variant(dev) == PXA3XX_NAND_VARIANT_ARMADA_8K) {
|
|
struct regmap *sysctrl_base = syscon_regmap_lookup_by_phandle(
|
|
dev, "marvell,system-controller");
|
|
u32 reg;
|
|
|
|
if (IS_ERR(sysctrl_base))
|
|
return PTR_ERR(sysctrl_base);
|
|
|
|
regmap_read(sysctrl_base, GENCONF_SOC_DEVICE_MUX, ®);
|
|
reg |= GENCONF_SOC_DEVICE_MUX_NFC_EN;
|
|
regmap_write(sysctrl_base, GENCONF_SOC_DEVICE_MUX, reg);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pxa3xx_nand_probe_dt(struct udevice *dev, struct pxa3xx_nand_info *info)
|
|
{
|
|
struct pxa3xx_nand_platform_data *pdata;
|
|
|
|
pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
|
|
if (!pdata)
|
|
return -ENOMEM;
|
|
|
|
info->mmio_base = dev_read_addr_ptr(dev);
|
|
|
|
pdata->num_cs = dev_read_u32_default(dev, "num-cs", 1);
|
|
if (pdata->num_cs != 1) {
|
|
pr_err("pxa3xx driver supports single CS only\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (dev_read_bool(dev, "nand-enable-arbiter"))
|
|
pdata->enable_arbiter = 1;
|
|
|
|
if (dev_read_bool(dev, "nand-keep-config"))
|
|
pdata->keep_config = 1;
|
|
|
|
/*
|
|
* ECC parameters.
|
|
* If these are not set, they will be selected according
|
|
* to the detected flash type.
|
|
*/
|
|
/* ECC strength */
|
|
pdata->ecc_strength = dev_read_u32_default(dev, "nand-ecc-strength", 0);
|
|
|
|
/* ECC step size */
|
|
pdata->ecc_step_size = dev_read_u32_default(dev, "nand-ecc-step-size",
|
|
0);
|
|
|
|
info->pdata = pdata;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pxa3xx_nand_probe(struct udevice *dev)
|
|
{
|
|
struct pxa3xx_nand_platform_data *pdata;
|
|
int ret, cs, probe_success;
|
|
struct pxa3xx_nand_info *info = dev_get_priv(dev);
|
|
|
|
ret = pxa3xx_nand_probe_dt(dev, info);
|
|
if (ret)
|
|
return ret;
|
|
|
|
pdata = info->pdata;
|
|
|
|
ret = alloc_nand_resource(dev, info);
|
|
if (ret) {
|
|
dev_err(dev, "alloc nand resource failed\n");
|
|
return ret;
|
|
}
|
|
|
|
probe_success = 0;
|
|
for (cs = 0; cs < pdata->num_cs; cs++) {
|
|
struct mtd_info *mtd = nand_to_mtd(&info->host[cs]->chip);
|
|
|
|
/*
|
|
* The mtd name matches the one used in 'mtdparts' kernel
|
|
* parameter. This name cannot be changed or otherwise
|
|
* user's mtd partitions configuration would get broken.
|
|
*/
|
|
mtd->name = "pxa3xx_nand-0";
|
|
info->cs = cs;
|
|
ret = pxa3xx_nand_scan(mtd);
|
|
if (ret) {
|
|
dev_info(mtd->dev, "failed to scan nand at cs %d\n",
|
|
cs);
|
|
continue;
|
|
}
|
|
|
|
if (nand_register(cs, mtd))
|
|
continue;
|
|
|
|
probe_success = 1;
|
|
}
|
|
|
|
if (!probe_success)
|
|
return -ENODEV;
|
|
|
|
return 0;
|
|
}
|
|
|
|
U_BOOT_DRIVER(pxa3xx_nand) = {
|
|
.name = "pxa3xx-nand",
|
|
.id = UCLASS_MTD,
|
|
.of_match = pxa3xx_nand_dt_ids,
|
|
.probe = pxa3xx_nand_probe,
|
|
.priv_auto = sizeof(struct pxa3xx_nand_info) +
|
|
sizeof(struct pxa3xx_nand_host) * CONFIG_SYS_MAX_NAND_DEVICE,
|
|
};
|
|
|
|
void board_nand_init(void)
|
|
{
|
|
struct udevice *dev;
|
|
int ret;
|
|
|
|
ret = uclass_get_device_by_driver(UCLASS_MTD,
|
|
DM_DRIVER_GET(pxa3xx_nand), &dev);
|
|
if (ret && ret != -ENODEV) {
|
|
pr_err("Failed to initialize %s. (error %d)\n", dev->name,
|
|
ret);
|
|
}
|
|
}
|