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4cf9339d20
With this removal, we don't need to 'get' the second DMA resource either, as it's also unused. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2051 lines
53 KiB
C
2051 lines
53 KiB
C
/*
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* drivers/mtd/nand/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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* See Documentation/mtd/nand/pxa3xx-nand.txt for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/dmaengine.h>
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#include <linux/dma-mapping.h>
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#include <linux/dma/pxa-dma.h>
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#include <linux/delay.h>
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#include <linux/clk.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/nand.h>
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#include <linux/mtd/partitions.h>
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#include <linux/io.h>
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#include <linux/iopoll.h>
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#include <linux/irq.h>
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#include <linux/slab.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_mtd.h>
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#include <linux/platform_data/mtd-nand-pxa3xx.h>
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#define CHIP_DELAY_TIMEOUT msecs_to_jiffies(200)
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#define NAND_STOP_DELAY msecs_to_jiffies(40)
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#define PAGE_CHUNK_SIZE (2048)
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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 NFCV2_NDCR_STOP_ON_UNCOR (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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/*
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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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do { \
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dev_vdbg(&info->pdev->dev, \
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"%s():%d nand_writel(0x%x, 0x%04x)\n", \
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__func__, __LINE__, (val), (off)); \
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writel_relaxed((val), (info)->mmio_base + (off)); \
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} while (0)
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#define nand_readl(info, off) \
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({ \
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unsigned int _v; \
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_v = readl_relaxed((info)->mmio_base + (off)); \
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dev_vdbg(&info->pdev->dev, \
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"%s():%d nand_readl(0x%04x) = 0x%x\n", \
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__func__, __LINE__, (off), _v); \
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_v; \
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})
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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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};
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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 platform_device *pdev;
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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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struct completion 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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/* DMA information */
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struct scatterlist sg;
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enum dma_data_direction dma_dir;
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struct dma_chan *dma_chan;
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dma_cookie_t dma_cookie;
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int drcmr_dat;
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unsigned char *data_buff;
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unsigned char *oob_buff;
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dma_addr_t data_buff_phys;
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int data_dma_ch;
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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 ecc_bch; /* using BCH ECC? */
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int use_dma; /* use DMA ? */
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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 bool use_dma = 1;
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module_param(use_dma, bool, 0444);
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MODULE_PARM_DESC(use_dma, "enable DMA for data transferring to/from NAND HW");
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struct pxa3xx_nand_timing {
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unsigned int tCH; /* Enable signal hold time */
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unsigned int tCS; /* Enable signal setup time */
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unsigned int tWH; /* ND_nWE high duration */
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unsigned int tWP; /* ND_nWE pulse time */
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unsigned int tRH; /* ND_nRE high duration */
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unsigned int tRP; /* ND_nRE pulse width */
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unsigned int tR; /* ND_nWE high to ND_nRE low for read */
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unsigned int tWHR; /* ND_nWE high to ND_nRE low for status read */
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unsigned int tAR; /* ND_ALE low to ND_nRE low delay */
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};
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struct pxa3xx_nand_flash {
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uint32_t chip_id;
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unsigned int flash_width; /* Width of Flash memory (DWIDTH_M) */
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unsigned int dfc_width; /* Width of flash controller(DWIDTH_C) */
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struct pxa3xx_nand_timing *timing; /* NAND Flash timing */
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};
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static struct pxa3xx_nand_timing timing[] = {
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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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};
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static struct pxa3xx_nand_flash builtin_flash_types[] = {
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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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};
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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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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_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_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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#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 of_device_id pxa3xx_nand_dt_ids[] = {
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{
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.compatible = "marvell,pxa3xx-nand",
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.data = (void *)PXA3XX_NAND_VARIANT_PXA,
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},
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{
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.compatible = "marvell,armada370-nand",
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.data = (void *)PXA3XX_NAND_VARIANT_ARMADA370,
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},
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{}
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};
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MODULE_DEVICE_TABLE(of, pxa3xx_nand_dt_ids);
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static enum pxa3xx_nand_variant
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pxa3xx_nand_get_variant(struct platform_device *pdev)
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{
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const struct of_device_id *of_id =
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of_match_device(pxa3xx_nand_dt_ids, &pdev->dev);
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if (!of_id)
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return PXA3XX_NAND_VARIANT_PXA;
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return (enum pxa3xx_nand_variant)of_id->data;
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}
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static void pxa3xx_nand_set_timing(struct pxa3xx_nand_host *host,
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const struct pxa3xx_nand_timing *t)
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{
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struct pxa3xx_nand_info *info = host->info_data;
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unsigned long nand_clk = clk_get_rate(info->clk);
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uint32_t ndtr0, ndtr1;
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ndtr0 = NDTR0_tCH(ns2cycle(t->tCH, nand_clk)) |
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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 = clk_get_rate(info->clk);
|
|
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_compat(struct pxa3xx_nand_host *host,
|
|
unsigned int *flash_width,
|
|
unsigned int *dfc_width)
|
|
{
|
|
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 i, id, ntypes;
|
|
|
|
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(&info->pdev->dev, "Error: timings not found\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
pxa3xx_nand_set_timing(host, f->timing);
|
|
|
|
*flash_width = f->flash_width;
|
|
*dfc_width = f->dfc_width;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pxa3xx_nand_init_timings_onfi(struct pxa3xx_nand_host *host,
|
|
int mode)
|
|
{
|
|
const struct nand_sdr_timings *timings;
|
|
|
|
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;
|
|
}
|
|
|
|
static int pxa3xx_nand_init(struct pxa3xx_nand_host *host)
|
|
{
|
|
struct nand_chip *chip = &host->chip;
|
|
struct pxa3xx_nand_info *info = host->info_data;
|
|
unsigned int flash_width = 0, dfc_width = 0;
|
|
int mode, err;
|
|
|
|
mode = onfi_get_async_timing_mode(chip);
|
|
if (mode == ONFI_TIMING_MODE_UNKNOWN) {
|
|
err = pxa3xx_nand_init_timings_compat(host, &flash_width,
|
|
&dfc_width);
|
|
if (err)
|
|
return err;
|
|
|
|
if (flash_width == 16) {
|
|
info->reg_ndcr |= NDCR_DWIDTH_M;
|
|
chip->options |= NAND_BUSWIDTH_16;
|
|
}
|
|
|
|
info->reg_ndcr |= (dfc_width == 16) ? NDCR_DWIDTH_C : 0;
|
|
} else {
|
|
err = pxa3xx_nand_init_timings_onfi(host, mode);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* NOTE: it is a must to set ND_RUN firstly, 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);
|
|
}
|
|
|
|
if (info->use_dma)
|
|
ndcr |= NDCR_DMA_EN;
|
|
else
|
|
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 pxa3xx_nand_stop(struct pxa3xx_nand_info *info)
|
|
{
|
|
uint32_t ndcr;
|
|
int timeout = NAND_STOP_DELAY;
|
|
|
|
/* wait RUN bit in NDCR become 0 */
|
|
ndcr = nand_readl(info, NDCR);
|
|
while ((ndcr & NDCR_ND_RUN) && (timeout-- > 0)) {
|
|
ndcr = nand_readl(info, NDCR);
|
|
udelay(1);
|
|
}
|
|
|
|
if (timeout <= 0) {
|
|
ndcr &= ~NDCR_ND_RUN;
|
|
nand_writel(info, NDCR, ndcr);
|
|
}
|
|
if (info->dma_chan)
|
|
dmaengine_terminate_all(info->dma_chan);
|
|
|
|
/* clear status bits */
|
|
nand_writel(info, NDSR, NDSR_MASK);
|
|
}
|
|
|
|
static void __maybe_unused
|
|
enable_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 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) {
|
|
u32 val;
|
|
int ret;
|
|
|
|
/*
|
|
* 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) {
|
|
ioread32_rep(info->mmio_base + NDDB, data, 8);
|
|
|
|
ret = readl_relaxed_poll_timeout(info->mmio_base + NDSR, val,
|
|
val & NDSR_RDDREQ, 1000, 5000);
|
|
if (ret) {
|
|
dev_err(&info->pdev->dev,
|
|
"Timeout on RDDREQ while draining the FIFO\n");
|
|
return;
|
|
}
|
|
|
|
data += 32;
|
|
len -= 8;
|
|
}
|
|
}
|
|
|
|
ioread32_rep(info->mmio_base + NDDB, data, len);
|
|
}
|
|
|
|
static void handle_data_pio(struct pxa3xx_nand_info *info)
|
|
{
|
|
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(info->step_chunk_size, 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 (info->step_chunk_size)
|
|
drain_fifo(info,
|
|
info->data_buff + info->data_buff_pos,
|
|
DIV_ROUND_UP(info->step_chunk_size, 4));
|
|
|
|
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->pdev->dev, "%s: invalid state %d\n", __func__,
|
|
info->state);
|
|
BUG();
|
|
}
|
|
|
|
/* Update buffer pointers for multi-page read/write */
|
|
info->data_buff_pos += info->step_chunk_size;
|
|
info->oob_buff_pos += info->step_spare_size;
|
|
}
|
|
|
|
static void pxa3xx_nand_data_dma_irq(void *data)
|
|
{
|
|
struct pxa3xx_nand_info *info = data;
|
|
struct dma_tx_state state;
|
|
enum dma_status status;
|
|
|
|
status = dmaengine_tx_status(info->dma_chan, info->dma_cookie, &state);
|
|
if (likely(status == DMA_COMPLETE)) {
|
|
info->state = STATE_DMA_DONE;
|
|
} else {
|
|
dev_err(&info->pdev->dev, "DMA error on data channel\n");
|
|
info->retcode = ERR_DMABUSERR;
|
|
}
|
|
dma_unmap_sg(info->dma_chan->device->dev, &info->sg, 1, info->dma_dir);
|
|
|
|
nand_writel(info, NDSR, NDSR_WRDREQ | NDSR_RDDREQ);
|
|
enable_int(info, NDCR_INT_MASK);
|
|
}
|
|
|
|
static void start_data_dma(struct pxa3xx_nand_info *info)
|
|
{
|
|
enum dma_transfer_direction direction;
|
|
struct dma_async_tx_descriptor *tx;
|
|
|
|
switch (info->state) {
|
|
case STATE_DMA_WRITING:
|
|
info->dma_dir = DMA_TO_DEVICE;
|
|
direction = DMA_MEM_TO_DEV;
|
|
break;
|
|
case STATE_DMA_READING:
|
|
info->dma_dir = DMA_FROM_DEVICE;
|
|
direction = DMA_DEV_TO_MEM;
|
|
break;
|
|
default:
|
|
dev_err(&info->pdev->dev, "%s: invalid state %d\n", __func__,
|
|
info->state);
|
|
BUG();
|
|
}
|
|
info->sg.length = info->chunk_size;
|
|
if (info->use_spare)
|
|
info->sg.length += info->spare_size + info->ecc_size;
|
|
dma_map_sg(info->dma_chan->device->dev, &info->sg, 1, info->dma_dir);
|
|
|
|
tx = dmaengine_prep_slave_sg(info->dma_chan, &info->sg, 1, direction,
|
|
DMA_PREP_INTERRUPT);
|
|
if (!tx) {
|
|
dev_err(&info->pdev->dev, "prep_slave_sg() failed\n");
|
|
return;
|
|
}
|
|
tx->callback = pxa3xx_nand_data_dma_irq;
|
|
tx->callback_param = info;
|
|
info->dma_cookie = dmaengine_submit(tx);
|
|
dma_async_issue_pending(info->dma_chan);
|
|
dev_dbg(&info->pdev->dev, "%s(dir=%d cookie=%x size=%u)\n",
|
|
__func__, direction, info->dma_cookie, info->sg.length);
|
|
}
|
|
|
|
static irqreturn_t pxa3xx_nand_irq_thread(int irq, void *data)
|
|
{
|
|
struct pxa3xx_nand_info *info = data;
|
|
|
|
handle_data_pio(info);
|
|
|
|
info->state = STATE_CMD_DONE;
|
|
nand_writel(info, NDSR, NDSR_WRDREQ | NDSR_RDDREQ);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static irqreturn_t pxa3xx_nand_irq(int irq, void *devid)
|
|
{
|
|
struct pxa3xx_nand_info *info = devid;
|
|
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;
|
|
}
|
|
|
|
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->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)) {
|
|
/* whether use dma to transfer data */
|
|
if (info->use_dma) {
|
|
disable_int(info, NDCR_INT_MASK);
|
|
info->state = (status & NDSR_RDDREQ) ?
|
|
STATE_DMA_READING : STATE_DMA_WRITING;
|
|
start_data_dma(info);
|
|
goto NORMAL_IRQ_EXIT;
|
|
} else {
|
|
info->state = (status & NDSR_RDDREQ) ?
|
|
STATE_PIO_READING : STATE_PIO_WRITING;
|
|
ret = IRQ_WAKE_THREAD;
|
|
goto NORMAL_IRQ_EXIT;
|
|
}
|
|
}
|
|
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)
|
|
nand_writel(info, NDCB0, info->ndcb3);
|
|
}
|
|
|
|
if (is_completed)
|
|
complete(&info->cmd_complete);
|
|
if (is_ready)
|
|
complete(&info->dev_ready);
|
|
NORMAL_IRQ_EXIT:
|
|
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 < PAGE_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_PAGEPROG:
|
|
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 (mtd->writesize == PAGE_CHUNK_SIZE) {
|
|
info->ndcb0 |= NDCB0_DBC | (NAND_CMD_READSTART << 8);
|
|
} else if (mtd->writesize > PAGE_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 > PAGE_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 > PAGE_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(&info->pdev->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) {
|
|
init_completion(&info->cmd_complete);
|
|
init_completion(&info->dev_ready);
|
|
info->need_wait = 1;
|
|
pxa3xx_nand_start(info);
|
|
|
|
if (!wait_for_completion_timeout(&info->cmd_complete,
|
|
CHIP_DELAY_TIMEOUT)) {
|
|
dev_err(&info->pdev->dev, "Wait time out!!!\n");
|
|
/* Stop State Machine for next command cycle */
|
|
pxa3xx_nand_stop(info);
|
|
}
|
|
}
|
|
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;
|
|
init_completion(&info->dev_ready);
|
|
do {
|
|
info->state = STATE_PREPARED;
|
|
|
|
exec_cmd = prepare_set_command(info, command, ext_cmd_type,
|
|
column, page_addr);
|
|
if (!exec_cmd) {
|
|
info->need_wait = 0;
|
|
complete(&info->dev_ready);
|
|
break;
|
|
}
|
|
|
|
init_completion(&info->cmd_complete);
|
|
pxa3xx_nand_start(info);
|
|
|
|
if (!wait_for_completion_timeout(&info->cmd_complete,
|
|
CHIP_DELAY_TIMEOUT)) {
|
|
dev_err(&info->pdev->dev, "Wait time out!!!\n");
|
|
/* Stop State Machine for next command cycle */
|
|
pxa3xx_nand_stop(info);
|
|
break;
|
|
}
|
|
|
|
/* 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;
|
|
|
|
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) {
|
|
/*
|
|
* for blank page (all 0xff), HW will calculate its ECC as
|
|
* 0, which is different from the ECC information within
|
|
* OOB, ignore such uncorrectable errors
|
|
*/
|
|
if (is_buf_blank(buf, mtd->writesize))
|
|
info->retcode = ERR_NONE;
|
|
else
|
|
mtd->ecc_stats.failed++;
|
|
}
|
|
|
|
return info->max_bitflips;
|
|
}
|
|
|
|
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) {
|
|
info->need_wait = 0;
|
|
if (!wait_for_completion_timeout(&info->dev_ready,
|
|
CHIP_DELAY_TIMEOUT)) {
|
|
dev_err(&info->pdev->dev, "Ready time out!!!\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_host *host = info->host[info->cs];
|
|
struct platform_device *pdev = info->pdev;
|
|
struct pxa3xx_nand_platform_data *pdata = dev_get_platdata(&pdev->dev);
|
|
const struct nand_sdr_timings *timings;
|
|
|
|
/* Configure default flash values */
|
|
info->chunk_size = PAGE_CHUNK_SIZE;
|
|
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;
|
|
|
|
/* 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);
|
|
return 0;
|
|
}
|
|
|
|
static void pxa3xx_nand_config_tail(struct pxa3xx_nand_info *info)
|
|
{
|
|
struct pxa3xx_nand_host *host = info->host[info->cs];
|
|
struct nand_chip *chip = &host->chip;
|
|
struct mtd_info *mtd = nand_to_mtd(chip);
|
|
|
|
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 platform_device *pdev = info->pdev;
|
|
struct pxa3xx_nand_platform_data *pdata = dev_get_platdata(&pdev->dev);
|
|
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)
|
|
{
|
|
struct platform_device *pdev = info->pdev;
|
|
struct dma_slave_config config;
|
|
dma_cap_mask_t mask;
|
|
struct pxad_param param;
|
|
int ret;
|
|
|
|
info->data_buff = kmalloc(info->buf_size, GFP_KERNEL);
|
|
if (info->data_buff == NULL)
|
|
return -ENOMEM;
|
|
if (use_dma == 0)
|
|
return 0;
|
|
|
|
ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
|
|
if (ret)
|
|
return ret;
|
|
|
|
sg_init_one(&info->sg, info->data_buff, info->buf_size);
|
|
dma_cap_zero(mask);
|
|
dma_cap_set(DMA_SLAVE, mask);
|
|
param.prio = PXAD_PRIO_LOWEST;
|
|
param.drcmr = info->drcmr_dat;
|
|
info->dma_chan = dma_request_slave_channel_compat(mask, pxad_filter_fn,
|
|
¶m, &pdev->dev,
|
|
"data");
|
|
if (!info->dma_chan) {
|
|
dev_err(&pdev->dev, "unable to request data dma channel\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
memset(&config, 0, sizeof(config));
|
|
config.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
|
|
config.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
|
|
config.src_addr = info->mmio_phys + NDDB;
|
|
config.dst_addr = info->mmio_phys + NDDB;
|
|
config.src_maxburst = 32;
|
|
config.dst_maxburst = 32;
|
|
ret = dmaengine_slave_config(info->dma_chan, &config);
|
|
if (ret < 0) {
|
|
dev_err(&info->pdev->dev,
|
|
"dma channel configuration failed: %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Now that DMA buffers are allocated we turn on
|
|
* DMA proper for I/O operations.
|
|
*/
|
|
info->use_dma = 1;
|
|
return 0;
|
|
}
|
|
|
|
static void pxa3xx_nand_free_buff(struct pxa3xx_nand_info *info)
|
|
{
|
|
if (info->use_dma) {
|
|
dmaengine_terminate_all(info->dma_chan);
|
|
dma_release_channel(info->dma_chan);
|
|
}
|
|
kfree(info->data_buff);
|
|
}
|
|
|
|
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;
|
|
|
|
/*
|
|
* Required ECC: 8-bit correction per 512 bytes
|
|
* Select: 16-bit correction per 1024 bytes
|
|
*/
|
|
} 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 {
|
|
dev_err(&info->pdev->dev,
|
|
"ECC strength %d at page size %d is not supported\n",
|
|
strength, page_size);
|
|
return -ENODEV;
|
|
}
|
|
|
|
dev_info(&info->pdev->dev, "ECC strength %d, ECC step size %d\n",
|
|
ecc->strength, ecc->size);
|
|
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 platform_device *pdev = info->pdev;
|
|
struct pxa3xx_nand_platform_data *pdata = dev_get_platdata(&pdev->dev);
|
|
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;
|
|
}
|
|
|
|
if (info->reg_ndcr & NDCR_DWIDTH_M)
|
|
chip->options |= NAND_BUSWIDTH_16;
|
|
|
|
/* Device detection must be done with ECC disabled */
|
|
if (info->variant == PXA3XX_NAND_VARIANT_ARMADA370)
|
|
nand_writel(info, NDECCCTRL, 0x0);
|
|
|
|
if (nand_scan_ident(mtd, 1, NULL))
|
|
return -ENODEV;
|
|
|
|
if (!pdata->keep_config) {
|
|
ret = pxa3xx_nand_init(host);
|
|
if (ret) {
|
|
dev_err(&info->pdev->dev, "Failed to init nand: %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
if (pdata->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;
|
|
}
|
|
|
|
/*
|
|
* 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 splitted) command handling,
|
|
*/
|
|
if (mtd->writesize > PAGE_CHUNK_SIZE) {
|
|
if (info->variant == PXA3XX_NAND_VARIANT_ARMADA370) {
|
|
chip->cmdfunc = nand_cmdfunc_extended;
|
|
} else {
|
|
dev_err(&info->pdev->dev,
|
|
"unsupported page size on this variant\n");
|
|
return -ENODEV;
|
|
}
|
|
}
|
|
|
|
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;
|
|
|
|
/* 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 platform_device *pdev)
|
|
{
|
|
struct device_node *np = pdev->dev.of_node;
|
|
struct pxa3xx_nand_platform_data *pdata;
|
|
struct pxa3xx_nand_info *info;
|
|
struct pxa3xx_nand_host *host;
|
|
struct nand_chip *chip = NULL;
|
|
struct mtd_info *mtd;
|
|
struct resource *r;
|
|
int ret, irq, cs;
|
|
|
|
pdata = dev_get_platdata(&pdev->dev);
|
|
if (pdata->num_cs <= 0)
|
|
return -ENODEV;
|
|
info = devm_kzalloc(&pdev->dev,
|
|
sizeof(*info) + sizeof(*host) * pdata->num_cs,
|
|
GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
info->pdev = pdev;
|
|
info->variant = pxa3xx_nand_get_variant(pdev);
|
|
for (cs = 0; cs < pdata->num_cs; cs++) {
|
|
host = (void *)&info[1] + sizeof(*host) * cs;
|
|
chip = &host->chip;
|
|
nand_set_controller_data(chip, host);
|
|
mtd = nand_to_mtd(chip);
|
|
info->host[cs] = host;
|
|
host->cs = cs;
|
|
host->info_data = info;
|
|
mtd->dev.parent = &pdev->dev;
|
|
/* FIXME: all chips use the same device tree partitions */
|
|
nand_set_flash_node(chip, np);
|
|
|
|
nand_set_controller_data(chip, host);
|
|
chip->ecc.read_page = pxa3xx_nand_read_page_hwecc;
|
|
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;
|
|
}
|
|
|
|
spin_lock_init(&chip->controller->lock);
|
|
init_waitqueue_head(&chip->controller->wq);
|
|
info->clk = devm_clk_get(&pdev->dev, NULL);
|
|
if (IS_ERR(info->clk)) {
|
|
dev_err(&pdev->dev, "failed to get nand clock\n");
|
|
return PTR_ERR(info->clk);
|
|
}
|
|
ret = clk_prepare_enable(info->clk);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (!np && use_dma) {
|
|
r = platform_get_resource(pdev, IORESOURCE_DMA, 0);
|
|
if (r == NULL) {
|
|
dev_err(&pdev->dev,
|
|
"no resource defined for data DMA\n");
|
|
ret = -ENXIO;
|
|
goto fail_disable_clk;
|
|
}
|
|
info->drcmr_dat = r->start;
|
|
}
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0) {
|
|
dev_err(&pdev->dev, "no IRQ resource defined\n");
|
|
ret = -ENXIO;
|
|
goto fail_disable_clk;
|
|
}
|
|
|
|
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
info->mmio_base = devm_ioremap_resource(&pdev->dev, r);
|
|
if (IS_ERR(info->mmio_base)) {
|
|
ret = PTR_ERR(info->mmio_base);
|
|
goto fail_disable_clk;
|
|
}
|
|
info->mmio_phys = r->start;
|
|
|
|
/* 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) {
|
|
ret = -ENOMEM;
|
|
goto fail_disable_clk;
|
|
}
|
|
|
|
/* initialize all interrupts to be disabled */
|
|
disable_int(info, NDSR_MASK);
|
|
|
|
ret = request_threaded_irq(irq, pxa3xx_nand_irq,
|
|
pxa3xx_nand_irq_thread, IRQF_ONESHOT,
|
|
pdev->name, info);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "failed to request IRQ\n");
|
|
goto fail_free_buf;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, info);
|
|
|
|
return 0;
|
|
|
|
fail_free_buf:
|
|
free_irq(irq, info);
|
|
kfree(info->data_buff);
|
|
fail_disable_clk:
|
|
clk_disable_unprepare(info->clk);
|
|
return ret;
|
|
}
|
|
|
|
static int pxa3xx_nand_remove(struct platform_device *pdev)
|
|
{
|
|
struct pxa3xx_nand_info *info = platform_get_drvdata(pdev);
|
|
struct pxa3xx_nand_platform_data *pdata;
|
|
int irq, cs;
|
|
|
|
if (!info)
|
|
return 0;
|
|
|
|
pdata = dev_get_platdata(&pdev->dev);
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq >= 0)
|
|
free_irq(irq, info);
|
|
pxa3xx_nand_free_buff(info);
|
|
|
|
/*
|
|
* In the pxa3xx case, the DFI bus is shared between the SMC and NFC.
|
|
* In order to prevent a lockup of the system bus, the DFI bus
|
|
* arbitration is granted to SMC upon driver removal. This is done by
|
|
* setting the x_ARB_CNTL bit, which also prevents the NAND to have
|
|
* access to the bus anymore.
|
|
*/
|
|
nand_writel(info, NDCR,
|
|
(nand_readl(info, NDCR) & ~NDCR_ND_ARB_EN) |
|
|
NFCV1_NDCR_ARB_CNTL);
|
|
clk_disable_unprepare(info->clk);
|
|
|
|
for (cs = 0; cs < pdata->num_cs; cs++)
|
|
nand_release(nand_to_mtd(&info->host[cs]->chip));
|
|
return 0;
|
|
}
|
|
|
|
static int pxa3xx_nand_probe_dt(struct platform_device *pdev)
|
|
{
|
|
struct pxa3xx_nand_platform_data *pdata;
|
|
struct device_node *np = pdev->dev.of_node;
|
|
const struct of_device_id *of_id =
|
|
of_match_device(pxa3xx_nand_dt_ids, &pdev->dev);
|
|
|
|
if (!of_id)
|
|
return 0;
|
|
|
|
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
|
|
if (!pdata)
|
|
return -ENOMEM;
|
|
|
|
if (of_get_property(np, "marvell,nand-enable-arbiter", NULL))
|
|
pdata->enable_arbiter = 1;
|
|
if (of_get_property(np, "marvell,nand-keep-config", NULL))
|
|
pdata->keep_config = 1;
|
|
of_property_read_u32(np, "num-cs", &pdata->num_cs);
|
|
pdata->flash_bbt = of_get_nand_on_flash_bbt(np);
|
|
|
|
pdata->ecc_strength = of_get_nand_ecc_strength(np);
|
|
if (pdata->ecc_strength < 0)
|
|
pdata->ecc_strength = 0;
|
|
|
|
pdata->ecc_step_size = of_get_nand_ecc_step_size(np);
|
|
if (pdata->ecc_step_size < 0)
|
|
pdata->ecc_step_size = 0;
|
|
|
|
pdev->dev.platform_data = pdata;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pxa3xx_nand_probe(struct platform_device *pdev)
|
|
{
|
|
struct pxa3xx_nand_platform_data *pdata;
|
|
struct pxa3xx_nand_info *info;
|
|
int ret, cs, probe_success, dma_available;
|
|
|
|
dma_available = IS_ENABLED(CONFIG_ARM) &&
|
|
(IS_ENABLED(CONFIG_ARCH_PXA) || IS_ENABLED(CONFIG_ARCH_MMP));
|
|
if (use_dma && !dma_available) {
|
|
use_dma = 0;
|
|
dev_warn(&pdev->dev,
|
|
"This platform can't do DMA on this device\n");
|
|
}
|
|
|
|
ret = pxa3xx_nand_probe_dt(pdev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
pdata = dev_get_platdata(&pdev->dev);
|
|
if (!pdata) {
|
|
dev_err(&pdev->dev, "no platform data defined\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
ret = alloc_nand_resource(pdev);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "alloc nand resource failed\n");
|
|
return ret;
|
|
}
|
|
|
|
info = platform_get_drvdata(pdev);
|
|
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_warn(&pdev->dev, "failed to scan nand at cs %d\n",
|
|
cs);
|
|
continue;
|
|
}
|
|
|
|
ret = mtd_device_register(mtd, pdata->parts[cs],
|
|
pdata->nr_parts[cs]);
|
|
if (!ret)
|
|
probe_success = 1;
|
|
}
|
|
|
|
if (!probe_success) {
|
|
pxa3xx_nand_remove(pdev);
|
|
return -ENODEV;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int pxa3xx_nand_suspend(struct device *dev)
|
|
{
|
|
struct pxa3xx_nand_info *info = dev_get_drvdata(dev);
|
|
|
|
if (info->state) {
|
|
dev_err(dev, "driver busy, state = %d\n", info->state);
|
|
return -EAGAIN;
|
|
}
|
|
|
|
clk_disable(info->clk);
|
|
return 0;
|
|
}
|
|
|
|
static int pxa3xx_nand_resume(struct device *dev)
|
|
{
|
|
struct pxa3xx_nand_info *info = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
ret = clk_enable(info->clk);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
/* We don't want to handle interrupt without calling mtd routine */
|
|
disable_int(info, NDCR_INT_MASK);
|
|
|
|
/*
|
|
* Directly set the chip select to a invalid value,
|
|
* then the driver would reset the timing according
|
|
* to current chip select at the beginning of cmdfunc
|
|
*/
|
|
info->cs = 0xff;
|
|
|
|
/*
|
|
* As the spec says, the NDSR would be updated to 0x1800 when
|
|
* doing the nand_clk disable/enable.
|
|
* To prevent it damaging state machine of the driver, clear
|
|
* all status before resume
|
|
*/
|
|
nand_writel(info, NDSR, NDSR_MASK);
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
#define pxa3xx_nand_suspend NULL
|
|
#define pxa3xx_nand_resume NULL
|
|
#endif
|
|
|
|
static const struct dev_pm_ops pxa3xx_nand_pm_ops = {
|
|
.suspend = pxa3xx_nand_suspend,
|
|
.resume = pxa3xx_nand_resume,
|
|
};
|
|
|
|
static struct platform_driver pxa3xx_nand_driver = {
|
|
.driver = {
|
|
.name = "pxa3xx-nand",
|
|
.of_match_table = pxa3xx_nand_dt_ids,
|
|
.pm = &pxa3xx_nand_pm_ops,
|
|
},
|
|
.probe = pxa3xx_nand_probe,
|
|
.remove = pxa3xx_nand_remove,
|
|
};
|
|
|
|
module_platform_driver(pxa3xx_nand_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("PXA3xx NAND controller driver");
|