[mirror_qemu.git] / hw / nand.c

/*
 * Flash NAND memory emulation.  Based on "16M x 8 Bit NAND Flash
 * Memory" datasheet for the KM29U128AT / K9F2808U0A chips from
 * Samsung Electronic.
 *
 * Copyright (c) 2006 Openedhand Ltd.
 * Written by Andrzej Zaborowski <balrog@zabor.org>
 *
 * This code is licensed under the GNU GPL v2.
 */

#ifndef NAND_IO

# include "hw.h"
# include "flash.h"
# include "block.h"
/* FIXME: Pass block device as an argument.  */
# include "sysemu.h"

# define NAND_CMD_READ0		0x00
# define NAND_CMD_READ1		0x01
# define NAND_CMD_READ2		0x50
# define NAND_CMD_LPREAD2	0x30
# define NAND_CMD_NOSERIALREAD2	0x35
# define NAND_CMD_RANDOMREAD1	0x05
# define NAND_CMD_RANDOMREAD2	0xe0
# define NAND_CMD_READID	0x90
# define NAND_CMD_RESET		0xff
# define NAND_CMD_PAGEPROGRAM1	0x80
# define NAND_CMD_PAGEPROGRAM2	0x10
# define NAND_CMD_CACHEPROGRAM2	0x15
# define NAND_CMD_BLOCKERASE1	0x60
# define NAND_CMD_BLOCKERASE2	0xd0
# define NAND_CMD_READSTATUS	0x70
# define NAND_CMD_COPYBACKPRG1	0x85

# define NAND_IOSTATUS_ERROR	(1 << 0)
# define NAND_IOSTATUS_PLANE0	(1 << 1)
# define NAND_IOSTATUS_PLANE1	(1 << 2)
# define NAND_IOSTATUS_PLANE2	(1 << 3)
# define NAND_IOSTATUS_PLANE3	(1 << 4)
# define NAND_IOSTATUS_BUSY	(1 << 6)
# define NAND_IOSTATUS_UNPROTCT	(1 << 7)

# define MAX_PAGE		0x800
# define MAX_OOB		0x40

struct NANDFlashState {
    uint8_t manf_id, chip_id;
    int size, pages;
    int page_shift, oob_shift, erase_shift, addr_shift;
    uint8_t *storage;
    BlockDriverState *bdrv;
    int mem_oob;

    int cle, ale, ce, wp, gnd;

    uint8_t io[MAX_PAGE + MAX_OOB + 0x400];
    uint8_t *ioaddr;
    int iolen;

    uint32_t cmd, addr;
    int addrlen;
    int status;
    int offset;

    void (*blk_write)(NANDFlashState *s);
    void (*blk_erase)(NANDFlashState *s);
    void (*blk_load)(NANDFlashState *s, uint32_t addr, int offset);
};

# define NAND_NO_AUTOINCR	0x00000001
# define NAND_BUSWIDTH_16	0x00000002
# define NAND_NO_PADDING	0x00000004
# define NAND_CACHEPRG		0x00000008
# define NAND_COPYBACK		0x00000010
# define NAND_IS_AND		0x00000020
# define NAND_4PAGE_ARRAY	0x00000040
# define NAND_NO_READRDY	0x00000100
# define NAND_SAMSUNG_LP	(NAND_NO_PADDING | NAND_COPYBACK)

# define NAND_IO

# define PAGE(addr)		((addr) >> ADDR_SHIFT)
# define PAGE_START(page)	(PAGE(page) * (PAGE_SIZE + OOB_SIZE))
# define PAGE_MASK		((1 << ADDR_SHIFT) - 1)
# define OOB_SHIFT		(PAGE_SHIFT - 5)
# define OOB_SIZE		(1 << OOB_SHIFT)
# define SECTOR(addr)		((addr) >> (9 + ADDR_SHIFT - PAGE_SHIFT))
# define SECTOR_OFFSET(addr)	((addr) & ((511 >> PAGE_SHIFT) << 8))

# define PAGE_SIZE		256
# define PAGE_SHIFT		8
# define PAGE_SECTORS		1
# define ADDR_SHIFT		8
# include "nand.c"
# define PAGE_SIZE		512
# define PAGE_SHIFT		9
# define PAGE_SECTORS		1
# define ADDR_SHIFT		8
# include "nand.c"
# define PAGE_SIZE		2048
# define PAGE_SHIFT		11
# define PAGE_SECTORS		4
# define ADDR_SHIFT		16
# include "nand.c"

/* Information based on Linux drivers/mtd/nand/nand_ids.c */
static const struct {
    int size;
    int width;
    int page_shift;
    int erase_shift;
    uint32_t options;
} nand_flash_ids[0x100] = {
    [0 ... 0xff] = { 0 },

    [0x6e] = { 1,	8,	8, 4, 0 },
    [0x64] = { 2,	8,	8, 4, 0 },
    [0x6b] = { 4,	8,	9, 4, 0 },
    [0xe8] = { 1,	8,	8, 4, 0 },
    [0xec] = { 1,	8,	8, 4, 0 },
    [0xea] = { 2,	8,	8, 4, 0 },
    [0xd5] = { 4,	8,	9, 4, 0 },
    [0xe3] = { 4,	8,	9, 4, 0 },
    [0xe5] = { 4,	8,	9, 4, 0 },
    [0xd6] = { 8,	8,	9, 4, 0 },

    [0x39] = { 8,	8,	9, 4, 0 },
    [0xe6] = { 8,	8,	9, 4, 0 },
    [0x49] = { 8,	16,	9, 4, NAND_BUSWIDTH_16 },
    [0x59] = { 8,	16,	9, 4, NAND_BUSWIDTH_16 },

    [0x33] = { 16,	8,	9, 5, 0 },
    [0x73] = { 16,	8,	9, 5, 0 },
    [0x43] = { 16,	16,	9, 5, NAND_BUSWIDTH_16 },
    [0x53] = { 16,	16,	9, 5, NAND_BUSWIDTH_16 },

    [0x35] = { 32,	8,	9, 5, 0 },
    [0x75] = { 32,	8,	9, 5, 0 },
    [0x45] = { 32,	16,	9, 5, NAND_BUSWIDTH_16 },
    [0x55] = { 32,	16,	9, 5, NAND_BUSWIDTH_16 },

    [0x36] = { 64,	8,	9, 5, 0 },
    [0x76] = { 64,	8,	9, 5, 0 },
    [0x46] = { 64,	16,	9, 5, NAND_BUSWIDTH_16 },
    [0x56] = { 64,	16,	9, 5, NAND_BUSWIDTH_16 },

    [0x78] = { 128,	8,	9, 5, 0 },
    [0x39] = { 128,	8,	9, 5, 0 },
    [0x79] = { 128,	8,	9, 5, 0 },
    [0x72] = { 128,	16,	9, 5, NAND_BUSWIDTH_16 },
    [0x49] = { 128,	16,	9, 5, NAND_BUSWIDTH_16 },
    [0x74] = { 128,	16,	9, 5, NAND_BUSWIDTH_16 },
    [0x59] = { 128,	16,	9, 5, NAND_BUSWIDTH_16 },

    [0x71] = { 256,	8,	9, 5, 0 },

    /*
     * These are the new chips with large page size. The pagesize and the
     * erasesize is determined from the extended id bytes
     */
# define LP_OPTIONS	(NAND_SAMSUNG_LP | NAND_NO_READRDY | NAND_NO_AUTOINCR)
# define LP_OPTIONS16	(LP_OPTIONS | NAND_BUSWIDTH_16)

    /* 512 Megabit */
    [0xa2] = { 64,	8,	0, 0, LP_OPTIONS },
    [0xf2] = { 64,	8,	0, 0, LP_OPTIONS },
    [0xb2] = { 64,	16,	0, 0, LP_OPTIONS16 },
    [0xc2] = { 64,	16,	0, 0, LP_OPTIONS16 },

    /* 1 Gigabit */
    [0xa1] = { 128,	8,	0, 0, LP_OPTIONS },
    [0xf1] = { 128,	8,	0, 0, LP_OPTIONS },
    [0xb1] = { 128,	16,	0, 0, LP_OPTIONS16 },
    [0xc1] = { 128,	16,	0, 0, LP_OPTIONS16 },

    /* 2 Gigabit */
    [0xaa] = { 256,	8,	0, 0, LP_OPTIONS },
    [0xda] = { 256,	8,	0, 0, LP_OPTIONS },
    [0xba] = { 256,	16,	0, 0, LP_OPTIONS16 },
    [0xca] = { 256,	16,	0, 0, LP_OPTIONS16 },

    /* 4 Gigabit */
    [0xac] = { 512,	8,	0, 0, LP_OPTIONS },
    [0xdc] = { 512,	8,	0, 0, LP_OPTIONS },
    [0xbc] = { 512,	16,	0, 0, LP_OPTIONS16 },
    [0xcc] = { 512,	16,	0, 0, LP_OPTIONS16 },

    /* 8 Gigabit */
    [0xa3] = { 1024,	8,	0, 0, LP_OPTIONS },
    [0xd3] = { 1024,	8,	0, 0, LP_OPTIONS },
    [0xb3] = { 1024,	16,	0, 0, LP_OPTIONS16 },
    [0xc3] = { 1024,	16,	0, 0, LP_OPTIONS16 },

    /* 16 Gigabit */
    [0xa5] = { 2048,	8,	0, 0, LP_OPTIONS },
    [0xd5] = { 2048,	8,	0, 0, LP_OPTIONS },
    [0xb5] = { 2048,	16,	0, 0, LP_OPTIONS16 },
    [0xc5] = { 2048,	16,	0, 0, LP_OPTIONS16 },
};

static void nand_reset(NANDFlashState *s)
{
    s->cmd = NAND_CMD_READ0;
    s->addr = 0;
    s->addrlen = 0;
    s->iolen = 0;
    s->offset = 0;
    s->status &= NAND_IOSTATUS_UNPROTCT;
}

static void nand_command(NANDFlashState *s)
{
    unsigned int offset;
    switch (s->cmd) {
    case NAND_CMD_READ0:
        s->iolen = 0;
        break;

    case NAND_CMD_READID:
        s->io[0] = s->manf_id;
        s->io[1] = s->chip_id;
        s->io[2] = 'Q';		/* Don't-care byte (often 0xa5) */
        if (nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP)
            s->io[3] = 0x15;	/* Page Size, Block Size, Spare Size.. */
        else
            s->io[3] = 0xc0;	/* Multi-plane */
        s->ioaddr = s->io;
        s->iolen = 4;
        break;

    case NAND_CMD_RANDOMREAD2:
    case NAND_CMD_NOSERIALREAD2:
        if (!(nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP))
            break;
        offset = s->addr & ((1 << s->addr_shift) - 1);
        s->blk_load(s, s->addr, offset);
        if (s->gnd)
            s->iolen = (1 << s->page_shift) - offset;
        else
            s->iolen = (1 << s->page_shift) + (1 << s->oob_shift) - offset;
        break;

    case NAND_CMD_RESET:
        nand_reset(s);
        break;

    case NAND_CMD_PAGEPROGRAM1:
        s->ioaddr = s->io;
        s->iolen = 0;
        break;

    case NAND_CMD_PAGEPROGRAM2:
        if (s->wp) {
            s->blk_write(s);
        }
        break;

    case NAND_CMD_BLOCKERASE1:
        break;

    case NAND_CMD_BLOCKERASE2:
        if (nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP)
            s->addr <<= 16;
        else
            s->addr <<= 8;

        if (s->wp) {
            s->blk_erase(s);
        }
        break;

    case NAND_CMD_READSTATUS:
        s->io[0] = s->status;
        s->ioaddr = s->io;
        s->iolen = 1;
        break;

    default:
        printf("%s: Unknown NAND command 0x%02x\n", __FUNCTION__, s->cmd);
    }
}

static void nand_save(QEMUFile *f, void *opaque)
{
    NANDFlashState *s = (NANDFlashState *) opaque;
    qemu_put_byte(f, s->cle);
    qemu_put_byte(f, s->ale);
    qemu_put_byte(f, s->ce);
    qemu_put_byte(f, s->wp);
    qemu_put_byte(f, s->gnd);
    qemu_put_buffer(f, s->io, sizeof(s->io));
    qemu_put_be32(f, s->ioaddr - s->io);
    qemu_put_be32(f, s->iolen);

    qemu_put_be32s(f, &s->cmd);
    qemu_put_be32s(f, &s->addr);
    qemu_put_be32(f, s->addrlen);
    qemu_put_be32(f, s->status);
    qemu_put_be32(f, s->offset);
    /* XXX: do we want to save s->storage too? */
}

static int nand_load(QEMUFile *f, void *opaque, int version_id)
{
    NANDFlashState *s = (NANDFlashState *) opaque;
    s->cle = qemu_get_byte(f);
    s->ale = qemu_get_byte(f);
    s->ce = qemu_get_byte(f);
    s->wp = qemu_get_byte(f);
    s->gnd = qemu_get_byte(f);
    qemu_get_buffer(f, s->io, sizeof(s->io));
    s->ioaddr = s->io + qemu_get_be32(f);
    s->iolen = qemu_get_be32(f);
    if (s->ioaddr >= s->io + sizeof(s->io) || s->ioaddr < s->io)
        return -EINVAL;

    qemu_get_be32s(f, &s->cmd);
    qemu_get_be32s(f, &s->addr);
    s->addrlen = qemu_get_be32(f);
    s->status = qemu_get_be32(f);
    s->offset = qemu_get_be32(f);
    return 0;
}

/*
 * Chip inputs are CLE, ALE, CE, WP, GND and eight I/O pins.  Chip
 * outputs are R/B and eight I/O pins.
 *
 * CE, WP and R/B are active low.
 */
void nand_setpins(NANDFlashState *s,
                int cle, int ale, int ce, int wp, int gnd)
{
    s->cle = cle;
    s->ale = ale;
    s->ce = ce;
    s->wp = wp;
    s->gnd = gnd;
    if (wp)
        s->status |= NAND_IOSTATUS_UNPROTCT;
    else
        s->status &= ~NAND_IOSTATUS_UNPROTCT;
}

void nand_getpins(NANDFlashState *s, int *rb)
{
    *rb = 1;
}

void nand_setio(NANDFlashState *s, uint8_t value)
{
    if (!s->ce && s->cle) {
        if (nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) {
            if (s->cmd == NAND_CMD_READ0 && value == NAND_CMD_LPREAD2)
                return;
            if (value == NAND_CMD_RANDOMREAD1) {
                s->addr &= ~((1 << s->addr_shift) - 1);
                s->addrlen = 0;
                return;
            }
        }
        if (value == NAND_CMD_READ0)
            s->offset = 0;
	else if (value == NAND_CMD_READ1) {
            s->offset = 0x100;
            value = NAND_CMD_READ0;
        }
	else if (value == NAND_CMD_READ2) {
            s->offset = 1 << s->page_shift;
            value = NAND_CMD_READ0;
        }

        s->cmd = value;

        if (s->cmd == NAND_CMD_READSTATUS ||
                s->cmd == NAND_CMD_PAGEPROGRAM2 ||
                s->cmd == NAND_CMD_BLOCKERASE1 ||
                s->cmd == NAND_CMD_BLOCKERASE2 ||
                s->cmd == NAND_CMD_NOSERIALREAD2 ||
                s->cmd == NAND_CMD_RANDOMREAD2 ||
                s->cmd == NAND_CMD_RESET)
            nand_command(s);

        if (s->cmd != NAND_CMD_RANDOMREAD2) {
            s->addrlen = 0;
        }
    }

    if (s->ale) {
        unsigned int shift = s->addrlen * 8;
        unsigned int mask = ~(0xff << shift);
        unsigned int v = value << shift;

        s->addr = (s->addr & mask) | v;
        s->addrlen ++;

        if (s->addrlen == 1 && s->cmd == NAND_CMD_READID)
            nand_command(s);

        if (!(nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) &&
                s->addrlen == 3 && (
                    s->cmd == NAND_CMD_READ0 ||
                    s->cmd == NAND_CMD_PAGEPROGRAM1))
            nand_command(s);
        if ((nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) &&
               s->addrlen == 4 && (
                    s->cmd == NAND_CMD_READ0 ||
                    s->cmd == NAND_CMD_PAGEPROGRAM1))
            nand_command(s);
    }

    if (!s->cle && !s->ale && s->cmd == NAND_CMD_PAGEPROGRAM1) {
        if (s->iolen < (1 << s->page_shift) + (1 << s->oob_shift))
            s->io[s->iolen ++] = value;
    } else if (!s->cle && !s->ale && s->cmd == NAND_CMD_COPYBACKPRG1) {
        if ((s->addr & ((1 << s->addr_shift) - 1)) <
                (1 << s->page_shift) + (1 << s->oob_shift)) {
            s->io[s->iolen + (s->addr & ((1 << s->addr_shift) - 1))] = value;
            s->addr ++;
        }
    }
}

uint8_t nand_getio(NANDFlashState *s)
{
    int offset;

    /* Allow sequential reading */
    if (!s->iolen && s->cmd == NAND_CMD_READ0) {
        offset = (s->addr & ((1 << s->addr_shift) - 1)) + s->offset;
        s->offset = 0;

        s->blk_load(s, s->addr, offset);
        if (s->gnd)
            s->iolen = (1 << s->page_shift) - offset;
        else
            s->iolen = (1 << s->page_shift) + (1 << s->oob_shift) - offset;
    }

    if (s->ce || s->iolen <= 0)
        return 0;

    s->iolen --;
    s->addr++;
    return *(s->ioaddr ++);
}

NANDFlashState *nand_init(int manf_id, int chip_id)
{
    int pagesize;
    NANDFlashState *s;
    DriveInfo *dinfo;

    if (nand_flash_ids[chip_id].size == 0) {
        hw_error("%s: Unsupported NAND chip ID.\n", __FUNCTION__);
    }

    s = (NANDFlashState *) qemu_mallocz(sizeof(NANDFlashState));
    dinfo = drive_get(IF_MTD, 0, 0);
    if (dinfo)
        s->bdrv = dinfo->bdrv;
    s->manf_id = manf_id;
    s->chip_id = chip_id;
    s->size = nand_flash_ids[s->chip_id].size << 20;
    if (nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) {
        s->page_shift = 11;
        s->erase_shift = 6;
    } else {
        s->page_shift = nand_flash_ids[s->chip_id].page_shift;
        s->erase_shift = nand_flash_ids[s->chip_id].erase_shift;
    }

    switch (1 << s->page_shift) {
    case 256:
        nand_init_256(s);
        break;
    case 512:
        nand_init_512(s);
        break;
    case 2048:
        nand_init_2048(s);
        break;
    default:
        hw_error("%s: Unsupported NAND block size.\n", __FUNCTION__);
    }

    pagesize = 1 << s->oob_shift;
    s->mem_oob = 1;
    if (s->bdrv && bdrv_getlength(s->bdrv) >=
                    (s->pages << s->page_shift) + (s->pages << s->oob_shift)) {
        pagesize = 0;
        s->mem_oob = 0;
    }

    if (!s->bdrv)
        pagesize += 1 << s->page_shift;
    if (pagesize)
        s->storage = (uint8_t *) memset(qemu_malloc(s->pages * pagesize),
                        0xff, s->pages * pagesize);
    /* Give s->ioaddr a sane value in case we save state before it
       is used.  */
    s->ioaddr = s->io;

    register_savevm("nand", -1, 0, nand_save, nand_load, s);

    return s;
}

void nand_done(NANDFlashState *s)
{
    if (s->bdrv) {
        bdrv_close(s->bdrv);
        bdrv_delete(s->bdrv);
    }

    if (!s->bdrv || s->mem_oob)
        qemu_free(s->storage);

    qemu_free(s);
}

#else

/* Program a single page */
static void glue(nand_blk_write_, PAGE_SIZE)(NANDFlashState *s)
{
    uint32_t off, page, sector, soff;
    uint8_t iobuf[(PAGE_SECTORS + 2) * 0x200];
    if (PAGE(s->addr) >= s->pages)
        return;

    if (!s->bdrv) {
        memcpy(s->storage + PAGE_START(s->addr) + (s->addr & PAGE_MASK) +
                        s->offset, s->io, s->iolen);
    } else if (s->mem_oob) {
        sector = SECTOR(s->addr);
        off = (s->addr & PAGE_MASK) + s->offset;
        soff = SECTOR_OFFSET(s->addr);
        if (bdrv_read(s->bdrv, sector, iobuf, PAGE_SECTORS) == -1) {
            printf("%s: read error in sector %i\n", __FUNCTION__, sector);
            return;
        }

        memcpy(iobuf + (soff | off), s->io, MIN(s->iolen, PAGE_SIZE - off));
        if (off + s->iolen > PAGE_SIZE) {
            page = PAGE(s->addr);
            memcpy(s->storage + (page << OOB_SHIFT), s->io + PAGE_SIZE - off,
                            MIN(OOB_SIZE, off + s->iolen - PAGE_SIZE));
        }

        if (bdrv_write(s->bdrv, sector, iobuf, PAGE_SECTORS) == -1)
            printf("%s: write error in sector %i\n", __FUNCTION__, sector);
    } else {
        off = PAGE_START(s->addr) + (s->addr & PAGE_MASK) + s->offset;
        sector = off >> 9;
        soff = off & 0x1ff;
        if (bdrv_read(s->bdrv, sector, iobuf, PAGE_SECTORS + 2) == -1) {
            printf("%s: read error in sector %i\n", __FUNCTION__, sector);
            return;
        }

        memcpy(iobuf + soff, s->io, s->iolen);

        if (bdrv_write(s->bdrv, sector, iobuf, PAGE_SECTORS + 2) == -1)
            printf("%s: write error in sector %i\n", __FUNCTION__, sector);
    }
    s->offset = 0;
}

/* Erase a single block */
static void glue(nand_blk_erase_, PAGE_SIZE)(NANDFlashState *s)
{
    uint32_t i, page, addr;
    uint8_t iobuf[0x200] = { [0 ... 0x1ff] = 0xff, };
    addr = s->addr & ~((1 << (ADDR_SHIFT + s->erase_shift)) - 1);

    if (PAGE(addr) >= s->pages)
        return;

    if (!s->bdrv) {
        memset(s->storage + PAGE_START(addr),
                        0xff, (PAGE_SIZE + OOB_SIZE) << s->erase_shift);
    } else if (s->mem_oob) {
        memset(s->storage + (PAGE(addr) << OOB_SHIFT),
                        0xff, OOB_SIZE << s->erase_shift);
        i = SECTOR(addr);
        page = SECTOR(addr + (ADDR_SHIFT + s->erase_shift));
        for (; i < page; i ++)
            if (bdrv_write(s->bdrv, i, iobuf, 1) == -1)
                printf("%s: write error in sector %i\n", __FUNCTION__, i);
    } else {
        addr = PAGE_START(addr);
        page = addr >> 9;
        if (bdrv_read(s->bdrv, page, iobuf, 1) == -1)
            printf("%s: read error in sector %i\n", __FUNCTION__, page);
        memset(iobuf + (addr & 0x1ff), 0xff, (~addr & 0x1ff) + 1);
        if (bdrv_write(s->bdrv, page, iobuf, 1) == -1)
            printf("%s: write error in sector %i\n", __FUNCTION__, page);

        memset(iobuf, 0xff, 0x200);
        i = (addr & ~0x1ff) + 0x200;
        for (addr += ((PAGE_SIZE + OOB_SIZE) << s->erase_shift) - 0x200;
                        i < addr; i += 0x200)
            if (bdrv_write(s->bdrv, i >> 9, iobuf, 1) == -1)
                printf("%s: write error in sector %i\n", __FUNCTION__, i >> 9);

        page = i >> 9;
        if (bdrv_read(s->bdrv, page, iobuf, 1) == -1)
            printf("%s: read error in sector %i\n", __FUNCTION__, page);
        memset(iobuf, 0xff, ((addr - 1) & 0x1ff) + 1);
        if (bdrv_write(s->bdrv, page, iobuf, 1) == -1)
            printf("%s: write error in sector %i\n", __FUNCTION__, page);
    }
}

static void glue(nand_blk_load_, PAGE_SIZE)(NANDFlashState *s,
                uint32_t addr, int offset)
{
    if (PAGE(addr) >= s->pages)
        return;

    if (s->bdrv) {
        if (s->mem_oob) {
            if (bdrv_read(s->bdrv, SECTOR(addr), s->io, PAGE_SECTORS) == -1)
                printf("%s: read error in sector %i\n",
                                __FUNCTION__, SECTOR(addr));
            memcpy(s->io + SECTOR_OFFSET(s->addr) + PAGE_SIZE,
                            s->storage + (PAGE(s->addr) << OOB_SHIFT),
                            OOB_SIZE);
            s->ioaddr = s->io + SECTOR_OFFSET(s->addr) + offset;
        } else {
            if (bdrv_read(s->bdrv, PAGE_START(addr) >> 9,
                                    s->io, (PAGE_SECTORS + 2)) == -1)
                printf("%s: read error in sector %i\n",
                                __FUNCTION__, PAGE_START(addr) >> 9);
            s->ioaddr = s->io + (PAGE_START(addr) & 0x1ff) + offset;
        }
    } else {
        memcpy(s->io, s->storage + PAGE_START(s->addr) +
                        offset, PAGE_SIZE + OOB_SIZE - offset);
        s->ioaddr = s->io;
    }
}

static void glue(nand_init_, PAGE_SIZE)(NANDFlashState *s)
{
    s->oob_shift = PAGE_SHIFT - 5;
    s->pages = s->size >> PAGE_SHIFT;
    s->addr_shift = ADDR_SHIFT;

    s->blk_erase = glue(nand_blk_erase_, PAGE_SIZE);
    s->blk_write = glue(nand_blk_write_, PAGE_SIZE);
    s->blk_load = glue(nand_blk_load_, PAGE_SIZE);
}

# undef PAGE_SIZE
# undef PAGE_SHIFT
# undef PAGE_SECTORS
# undef ADDR_SHIFT
#endif	/* NAND_IO */
Commit	Line	Data
3e3d5815 AZ	1	/*
	2	* Flash NAND memory emulation. Based on "16M x 8 Bit NAND Flash
	3	* Memory" datasheet for the KM29U128AT / K9F2808U0A chips from
	4	* Samsung Electronic.
	5	*
	6	* Copyright (c) 2006 Openedhand Ltd.
	7	* Written by Andrzej Zaborowski <balrog@zabor.org>
	8	*
	9	* This code is licensed under the GNU GPL v2.
	10	*/
	11
	12	#ifndef NAND_IO
	13
87ecb68b PB	14	# include "hw.h"
	15	# include "flash.h"
	16	# include "block.h"
	17	/* FIXME: Pass block device as an argument. */
	18	# include "sysemu.h"
3e3d5815 AZ	19
	20	# define NAND_CMD_READ0 0x00
	21	# define NAND_CMD_READ1 0x01
	22	# define NAND_CMD_READ2 0x50
	23	# define NAND_CMD_LPREAD2 0x30
	24	# define NAND_CMD_NOSERIALREAD2 0x35
	25	# define NAND_CMD_RANDOMREAD1 0x05
	26	# define NAND_CMD_RANDOMREAD2 0xe0
	27	# define NAND_CMD_READID 0x90
	28	# define NAND_CMD_RESET 0xff
	29	# define NAND_CMD_PAGEPROGRAM1 0x80
	30	# define NAND_CMD_PAGEPROGRAM2 0x10
	31	# define NAND_CMD_CACHEPROGRAM2 0x15
	32	# define NAND_CMD_BLOCKERASE1 0x60
	33	# define NAND_CMD_BLOCKERASE2 0xd0
	34	# define NAND_CMD_READSTATUS 0x70
	35	# define NAND_CMD_COPYBACKPRG1 0x85
	36
	37	# define NAND_IOSTATUS_ERROR (1 << 0)
	38	# define NAND_IOSTATUS_PLANE0 (1 << 1)
	39	# define NAND_IOSTATUS_PLANE1 (1 << 2)
	40	# define NAND_IOSTATUS_PLANE2 (1 << 3)
	41	# define NAND_IOSTATUS_PLANE3 (1 << 4)
	42	# define NAND_IOSTATUS_BUSY (1 << 6)
	43	# define NAND_IOSTATUS_UNPROTCT (1 << 7)
	44
	45	# define MAX_PAGE 0x800
	46	# define MAX_OOB 0x40
	47
bc24a225	48	struct NANDFlashState {
3e3d5815 AZ	49	uint8_t manf_id, chip_id;
	50	int size, pages;
	51	int page_shift, oob_shift, erase_shift, addr_shift;
	52	uint8_t *storage;
	53	BlockDriverState *bdrv;
	54	int mem_oob;
	55
	56	int cle, ale, ce, wp, gnd;
	57
	58	uint8_t io[MAX_PAGE + MAX_OOB + 0x400];
	59	uint8_t *ioaddr;
	60	int iolen;
	61
	62	uint32_t cmd, addr;
	63	int addrlen;
	64	int status;
	65	int offset;
	66
bc24a225 PB	67	void (blk_write)(NANDFlashState s);
	68	void (blk_erase)(NANDFlashState s);
	69	void (blk_load)(NANDFlashState s, uint32_t addr, int offset);
3e3d5815 AZ	70	};
	71
	72	# define NAND_NO_AUTOINCR 0x00000001
	73	# define NAND_BUSWIDTH_16 0x00000002
	74	# define NAND_NO_PADDING 0x00000004
	75	# define NAND_CACHEPRG 0x00000008
	76	# define NAND_COPYBACK 0x00000010
	77	# define NAND_IS_AND 0x00000020
	78	# define NAND_4PAGE_ARRAY 0x00000040
	79	# define NAND_NO_READRDY 0x00000100
	80	# define NAND_SAMSUNG_LP (NAND_NO_PADDING \| NAND_COPYBACK)
	81
	82	# define NAND_IO
	83
	84	# define PAGE(addr) ((addr) >> ADDR_SHIFT)
	85	# define PAGE_START(page) (PAGE(page) * (PAGE_SIZE + OOB_SIZE))
	86	# define PAGE_MASK ((1 << ADDR_SHIFT) - 1)
	87	# define OOB_SHIFT (PAGE_SHIFT - 5)
	88	# define OOB_SIZE (1 << OOB_SHIFT)
	89	# define SECTOR(addr) ((addr) >> (9 + ADDR_SHIFT - PAGE_SHIFT))
	90	# define SECTOR_OFFSET(addr) ((addr) & ((511 >> PAGE_SHIFT) << 8))
	91
	92	# define PAGE_SIZE 256
	93	# define PAGE_SHIFT 8
	94	# define PAGE_SECTORS 1
	95	# define ADDR_SHIFT 8
	96	# include "nand.c"
	97	# define PAGE_SIZE 512
	98	# define PAGE_SHIFT 9
	99	# define PAGE_SECTORS 1
	100	# define ADDR_SHIFT 8
	101	# include "nand.c"
	102	# define PAGE_SIZE 2048
	103	# define PAGE_SHIFT 11
	104	# define PAGE_SECTORS 4
	105	# define ADDR_SHIFT 16
	106	# include "nand.c"
	107
	108	/* Information based on Linux drivers/mtd/nand/nand_ids.c */
bc24a225	109	static const struct {
3e3d5815 AZ	110	int size;
	111	int width;
	112	int page_shift;
	113	int erase_shift;
	114	uint32_t options;
	115	} nand_flash_ids[0x100] = {
	116	[0 ... 0xff] = { 0 },
	117
	118	[0x6e] = { 1, 8, 8, 4, 0 },
	119	[0x64] = { 2, 8, 8, 4, 0 },
	120	[0x6b] = { 4, 8, 9, 4, 0 },
	121	[0xe8] = { 1, 8, 8, 4, 0 },
	122	[0xec] = { 1, 8, 8, 4, 0 },
	123	[0xea] = { 2, 8, 8, 4, 0 },
	124	[0xd5] = { 4, 8, 9, 4, 0 },
	125	[0xe3] = { 4, 8, 9, 4, 0 },
	126	[0xe5] = { 4, 8, 9, 4, 0 },
	127	[0xd6] = { 8, 8, 9, 4, 0 },
	128
	129	[0x39] = { 8, 8, 9, 4, 0 },
	130	[0xe6] = { 8, 8, 9, 4, 0 },
	131	[0x49] = { 8, 16, 9, 4, NAND_BUSWIDTH_16 },
	132	[0x59] = { 8, 16, 9, 4, NAND_BUSWIDTH_16 },
	133
	134	[0x33] = { 16, 8, 9, 5, 0 },
	135	[0x73] = { 16, 8, 9, 5, 0 },
	136	[0x43] = { 16, 16, 9, 5, NAND_BUSWIDTH_16 },
	137	[0x53] = { 16, 16, 9, 5, NAND_BUSWIDTH_16 },
	138
	139	[0x35] = { 32, 8, 9, 5, 0 },
	140	[0x75] = { 32, 8, 9, 5, 0 },
	141	[0x45] = { 32, 16, 9, 5, NAND_BUSWIDTH_16 },
	142	[0x55] = { 32, 16, 9, 5, NAND_BUSWIDTH_16 },
	143
	144	[0x36] = { 64, 8, 9, 5, 0 },
	145	[0x76] = { 64, 8, 9, 5, 0 },
	146	[0x46] = { 64, 16, 9, 5, NAND_BUSWIDTH_16 },
	147	[0x56] = { 64, 16, 9, 5, NAND_BUSWIDTH_16 },
	148
	149	[0x78] = { 128, 8, 9, 5, 0 },
	150	[0x39] = { 128, 8, 9, 5, 0 },
	151	[0x79] = { 128, 8, 9, 5, 0 },
	152	[0x72] = { 128, 16, 9, 5, NAND_BUSWIDTH_16 },
	153	[0x49] = { 128, 16, 9, 5, NAND_BUSWIDTH_16 },
	154	[0x74] = { 128, 16, 9, 5, NAND_BUSWIDTH_16 },
	155	[0x59] = { 128, 16, 9, 5, NAND_BUSWIDTH_16 },
	156
	157	[0x71] = { 256, 8, 9, 5, 0 },
	158
	159	/*
	160	* These are the new chips with large page size. The pagesize and the
	161	* erasesize is determined from the extended id bytes
	162	*/
	163	# define LP_OPTIONS (NAND_SAMSUNG_LP \| NAND_NO_READRDY \| NAND_NO_AUTOINCR)
	164	# define LP_OPTIONS16 (LP_OPTIONS \| NAND_BUSWIDTH_16)
	165
	166	/* 512 Megabit */
	167	[0xa2] = { 64, 8, 0, 0, LP_OPTIONS },
	168	[0xf2] = { 64, 8, 0, 0, LP_OPTIONS },
	169	[0xb2] = { 64, 16, 0, 0, LP_OPTIONS16 },
	170	[0xc2] = { 64, 16, 0, 0, LP_OPTIONS16 },
	171
	172	/* 1 Gigabit */
	173	[0xa1] = { 128, 8, 0, 0, LP_OPTIONS },
174	[0xf1] = { 128, 8, 0, 0, LP_OPTIONS },
175	[0xb1] = { 128, 16, 0, 0, LP_OPTIONS16 },
176	[0xc1] = { 128, 16, 0, 0, LP_OPTIONS16 },
177
178	/* 2 Gigabit */
179	[0xaa] = { 256, 8, 0, 0, LP_OPTIONS },
180	[0xda] = { 256, 8, 0, 0, LP_OPTIONS },
181	[0xba] = { 256, 16, 0, 0, LP_OPTIONS16 },
182	[0xca] = { 256, 16, 0, 0, LP_OPTIONS16 },
183
184	/* 4 Gigabit */
185	[0xac] = { 512, 8, 0, 0, LP_OPTIONS },
186	[0xdc] = { 512, 8, 0, 0, LP_OPTIONS },
187	[0xbc] = { 512, 16, 0, 0, LP_OPTIONS16 },
188	[0xcc] = { 512, 16, 0, 0, LP_OPTIONS16 },
189
190	/* 8 Gigabit */
191	[0xa3] = { 1024, 8, 0, 0, LP_OPTIONS },
192	[0xd3] = { 1024, 8, 0, 0, LP_OPTIONS },
193	[0xb3] = { 1024, 16, 0, 0, LP_OPTIONS16 },
194	[0xc3] = { 1024, 16, 0, 0, LP_OPTIONS16 },
195
196	/* 16 Gigabit */
197	[0xa5] = { 2048, 8, 0, 0, LP_OPTIONS },
198	[0xd5] = { 2048, 8, 0, 0, LP_OPTIONS },
199	[0xb5] = { 2048, 16, 0, 0, LP_OPTIONS16 },
200	[0xc5] = { 2048, 16, 0, 0, LP_OPTIONS16 },
201	};
202
bc24a225	203	static void nand_reset(NANDFlashState *s)
3e3d5815 AZ	204	{
	205	s->cmd = NAND_CMD_READ0;
	206	s->addr = 0;
	207	s->addrlen = 0;
	208	s->iolen = 0;
	209	s->offset = 0;
	210	s->status &= NAND_IOSTATUS_UNPROTCT;
	211	}
	212
bc24a225	213	static void nand_command(NANDFlashState *s)
3e3d5815	214	{
fccd2613	215	unsigned int offset;
3e3d5815 AZ	216	switch (s->cmd) {
	217	case NAND_CMD_READ0:
	218	s->iolen = 0;
	219	break;
	220
	221	case NAND_CMD_READID:
	222	s->io[0] = s->manf_id;
	223	s->io[1] = s->chip_id;
	224	s->io[2] = 'Q'; /* Don't-care byte (often 0xa5) */
	225	if (nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP)
	226	s->io[3] = 0x15; /* Page Size, Block Size, Spare Size.. */
	227	else
	228	s->io[3] = 0xc0; /* Multi-plane */
	229	s->ioaddr = s->io;
	230	s->iolen = 4;
	231	break;
	232
	233	case NAND_CMD_RANDOMREAD2:
	234	case NAND_CMD_NOSERIALREAD2:
	235	if (!(nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP))
	236	break;
fccd2613 EI	237	offset = s->addr & ((1 << s->addr_shift) - 1);
	238	s->blk_load(s, s->addr, offset);
	239	if (s->gnd)
	240	s->iolen = (1 << s->page_shift) - offset;
	241	else
	242	s->iolen = (1 << s->page_shift) + (1 << s->oob_shift) - offset;
3e3d5815 AZ	243	break;
	244
	245	case NAND_CMD_RESET:
	246	nand_reset(s);
	247	break;
	248
	249	case NAND_CMD_PAGEPROGRAM1:
	250	s->ioaddr = s->io;
	251	s->iolen = 0;
	252	break;
	253
	254	case NAND_CMD_PAGEPROGRAM2:
	255	if (s->wp) {
	256	s->blk_write(s);
	257	}
	258	break;
	259
	260	case NAND_CMD_BLOCKERASE1:
	261	break;
	262
	263	case NAND_CMD_BLOCKERASE2:
	264	if (nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP)
	265	s->addr <<= 16;
	266	else
	267	s->addr <<= 8;
	268
	269	if (s->wp) {
	270	s->blk_erase(s);
	271	}
	272	break;
	273
	274	case NAND_CMD_READSTATUS:
	275	s->io[0] = s->status;
	276	s->ioaddr = s->io;
	277	s->iolen = 1;
	278	break;
	279
	280	default:
	281	printf("%s: Unknown NAND command 0x%02x\n", __FUNCTION__, s->cmd);
	282	}
	283	}
	284
aa941b94 AZ	285	static void nand_save(QEMUFile f, void opaque)
aa941b94 AZ	286	{
bc24a225	287	NANDFlashState s = (NANDFlashState ) opaque;
aa941b94 AZ	288	qemu_put_byte(f, s->cle);
	289	qemu_put_byte(f, s->ale);
	290	qemu_put_byte(f, s->ce);
	291	qemu_put_byte(f, s->wp);
	292	qemu_put_byte(f, s->gnd);
	293	qemu_put_buffer(f, s->io, sizeof(s->io));
	294	qemu_put_be32(f, s->ioaddr - s->io);
	295	qemu_put_be32(f, s->iolen);
	296
	297	qemu_put_be32s(f, &s->cmd);
	298	qemu_put_be32s(f, &s->addr);
	299	qemu_put_be32(f, s->addrlen);
	300	qemu_put_be32(f, s->status);
	301	qemu_put_be32(f, s->offset);
	302	/* XXX: do we want to save s->storage too? */
	303	}
	304
	305	static int nand_load(QEMUFile f, void opaque, int version_id)
	306	{
bc24a225	307	NANDFlashState s = (NANDFlashState ) opaque;
aa941b94 AZ	308	s->cle = qemu_get_byte(f);
	309	s->ale = qemu_get_byte(f);
	310	s->ce = qemu_get_byte(f);
	311	s->wp = qemu_get_byte(f);
	312	s->gnd = qemu_get_byte(f);
	313	qemu_get_buffer(f, s->io, sizeof(s->io));
	314	s->ioaddr = s->io + qemu_get_be32(f);
	315	s->iolen = qemu_get_be32(f);
	316	if (s->ioaddr >= s->io + sizeof(s->io) \|\| s->ioaddr < s->io)
	317	return -EINVAL;
	318
	319	qemu_get_be32s(f, &s->cmd);
	320	qemu_get_be32s(f, &s->addr);
	321	s->addrlen = qemu_get_be32(f);
	322	s->status = qemu_get_be32(f);
	323	s->offset = qemu_get_be32(f);
	324	return 0;
	325	}
	326
3e3d5815 AZ	327	/*
	328	* Chip inputs are CLE, ALE, CE, WP, GND and eight I/O pins. Chip
	329	* outputs are R/B and eight I/O pins.
	330	*
	331	* CE, WP and R/B are active low.
	332	*/
bc24a225	333	void nand_setpins(NANDFlashState *s,
3e3d5815 AZ	334	int cle, int ale, int ce, int wp, int gnd)
	335	{
	336	s->cle = cle;
	337	s->ale = ale;
	338	s->ce = ce;
	339	s->wp = wp;
	340	s->gnd = gnd;
	341	if (wp)
	342	s->status \|= NAND_IOSTATUS_UNPROTCT;
	343	else
	344	s->status &= ~NAND_IOSTATUS_UNPROTCT;
	345	}
	346
bc24a225	347	void nand_getpins(NANDFlashState s, int rb)
3e3d5815 AZ	348	{
	349	*rb = 1;
	350	}
	351
bc24a225	352	void nand_setio(NANDFlashState *s, uint8_t value)
3e3d5815 AZ	353	{
	354	if (!s->ce && s->cle) {
	355	if (nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) {
	356	if (s->cmd == NAND_CMD_READ0 && value == NAND_CMD_LPREAD2)
	357	return;
	358	if (value == NAND_CMD_RANDOMREAD1) {
	359	s->addr &= ~((1 << s->addr_shift) - 1);
	360	s->addrlen = 0;
	361	return;
	362	}
	363	}
	364	if (value == NAND_CMD_READ0)
	365	s->offset = 0;
	366	else if (value == NAND_CMD_READ1) {
	367	s->offset = 0x100;
	368	value = NAND_CMD_READ0;
	369	}
	370	else if (value == NAND_CMD_READ2) {
	371	s->offset = 1 << s->page_shift;
	372	value = NAND_CMD_READ0;
	373	}
	374
	375	s->cmd = value;
	376
	377	if (s->cmd == NAND_CMD_READSTATUS \|\|
	378	s->cmd == NAND_CMD_PAGEPROGRAM2 \|\|
	379	s->cmd == NAND_CMD_BLOCKERASE1 \|\|
	380	s->cmd == NAND_CMD_BLOCKERASE2 \|\|
	381	s->cmd == NAND_CMD_NOSERIALREAD2 \|\|
	382	s->cmd == NAND_CMD_RANDOMREAD2 \|\|
	383	s->cmd == NAND_CMD_RESET)
	384	nand_command(s);
	385
	386	if (s->cmd != NAND_CMD_RANDOMREAD2) {
	387	s->addrlen = 0;
3e3d5815 AZ	388	}
	389	}
	390
	391	if (s->ale) {
fccd2613 EI	392	unsigned int shift = s->addrlen * 8;
	393	unsigned int mask = ~(0xff << shift);
	394	unsigned int v = value << shift;
	395
	396	s->addr = (s->addr & mask) \| v;
3e3d5815 AZ	397	s->addrlen ++;
	398
	399	if (s->addrlen == 1 && s->cmd == NAND_CMD_READID)
	400	nand_command(s);
	401
	402	if (!(nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) &&
	403	s->addrlen == 3 && (
	404	s->cmd == NAND_CMD_READ0 \|\|
	405	s->cmd == NAND_CMD_PAGEPROGRAM1))
	406	nand_command(s);
	407	if ((nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) &&
	408	s->addrlen == 4 && (
	409	s->cmd == NAND_CMD_READ0 \|\|
	410	s->cmd == NAND_CMD_PAGEPROGRAM1))
	411	nand_command(s);
	412	}
	413
	414	if (!s->cle && !s->ale && s->cmd == NAND_CMD_PAGEPROGRAM1) {
	415	if (s->iolen < (1 << s->page_shift) + (1 << s->oob_shift))
	416	s->io[s->iolen ++] = value;
	417	} else if (!s->cle && !s->ale && s->cmd == NAND_CMD_COPYBACKPRG1) {
	418	if ((s->addr & ((1 << s->addr_shift) - 1)) <
	419	(1 << s->page_shift) + (1 << s->oob_shift)) {
	420	s->io[s->iolen + (s->addr & ((1 << s->addr_shift) - 1))] = value;
	421	s->addr ++;
	422	}
	423	}
	424	}
	425
bc24a225	426	uint8_t nand_getio(NANDFlashState *s)
3e3d5815 AZ	427	{
3e3d5815 AZ	428	int offset;
5fafdf24	429
3e3d5815 AZ	430	/* Allow sequential reading */
	431	if (!s->iolen && s->cmd == NAND_CMD_READ0) {
	432	offset = (s->addr & ((1 << s->addr_shift) - 1)) + s->offset;
	433	s->offset = 0;
	434
	435	s->blk_load(s, s->addr, offset);
	436	if (s->gnd)
	437	s->iolen = (1 << s->page_shift) - offset;
	438	else
	439	s->iolen = (1 << s->page_shift) + (1 << s->oob_shift) - offset;
	440	}
	441
	442	if (s->ce \|\| s->iolen <= 0)
	443	return 0;
	444
	445	s->iolen --;
fccd2613	446	s->addr++;
3e3d5815 AZ	447	return *(s->ioaddr ++);
	448	}
	449
bc24a225	450	NANDFlashState *nand_init(int manf_id, int chip_id)
3e3d5815 AZ	451	{
3e3d5815 AZ	452	int pagesize;
bc24a225	453	NANDFlashState *s;
751c6a17	454	DriveInfo *dinfo;
3e3d5815 AZ	455
3e3d5815 AZ	456	if (nand_flash_ids[chip_id].size == 0) {
2ac71179	457	hw_error("%s: Unsupported NAND chip ID.\n", __FUNCTION__);
3e3d5815 AZ	458	}
3e3d5815 AZ	459
bc24a225	460	s = (NANDFlashState *) qemu_mallocz(sizeof(NANDFlashState));
751c6a17 GH	461	dinfo = drive_get(IF_MTD, 0, 0);
	462	if (dinfo)
	463	s->bdrv = dinfo->bdrv;
3e3d5815 AZ	464	s->manf_id = manf_id;
	465	s->chip_id = chip_id;
	466	s->size = nand_flash_ids[s->chip_id].size << 20;
	467	if (nand_flash_ids[s->chip_id].options & NAND_SAMSUNG_LP) {
	468	s->page_shift = 11;
	469	s->erase_shift = 6;
	470	} else {
	471	s->page_shift = nand_flash_ids[s->chip_id].page_shift;
	472	s->erase_shift = nand_flash_ids[s->chip_id].erase_shift;
	473	}
	474
	475	switch (1 << s->page_shift) {
	476	case 256:
	477	nand_init_256(s);
	478	break;
	479	case 512:
	480	nand_init_512(s);
	481	break;
	482	case 2048:
	483	nand_init_2048(s);
	484	break;
	485	default:
2ac71179	486	hw_error("%s: Unsupported NAND block size.\n", __FUNCTION__);
3e3d5815 AZ	487	}
	488
	489	pagesize = 1 << s->oob_shift;
	490	s->mem_oob = 1;
	491	if (s->bdrv && bdrv_getlength(s->bdrv) >=
	492	(s->pages << s->page_shift) + (s->pages << s->oob_shift)) {
	493	pagesize = 0;
	494	s->mem_oob = 0;
	495	}
	496
	497	if (!s->bdrv)
	498	pagesize += 1 << s->page_shift;
	499	if (pagesize)
	500	s->storage = (uint8_t ) memset(qemu_malloc(s->pages pagesize),
	501	0xff, s->pages * pagesize);
48927926 PB	502	/* Give s->ioaddr a sane value in case we save state before it
	503	is used. */
	504	s->ioaddr = s->io;
aa941b94	505
18be5187	506	register_savevm("nand", -1, 0, nand_save, nand_load, s);
aa941b94	507
3e3d5815 AZ	508	return s;
	509	}
	510
bc24a225	511	void nand_done(NANDFlashState *s)
3e3d5815 AZ	512	{
	513	if (s->bdrv) {
	514	bdrv_close(s->bdrv);
	515	bdrv_delete(s->bdrv);
	516	}
	517
	518	if (!s->bdrv \|\| s->mem_oob)
5f6eab3f	519	qemu_free(s->storage);
3e3d5815	520
5f6eab3f	521	qemu_free(s);
3e3d5815 AZ	522	}
	523
	524	#else
	525
	526	/* Program a single page */
bc24a225	527	static void glue(nand_blk_write_, PAGE_SIZE)(NANDFlashState *s)
3e3d5815 AZ	528	{
	529	uint32_t off, page, sector, soff;
	530	uint8_t iobuf[(PAGE_SECTORS + 2) * 0x200];
	531	if (PAGE(s->addr) >= s->pages)
	532	return;
	533
	534	if (!s->bdrv) {
	535	memcpy(s->storage + PAGE_START(s->addr) + (s->addr & PAGE_MASK) +
	536	s->offset, s->io, s->iolen);
	537	} else if (s->mem_oob) {
	538	sector = SECTOR(s->addr);
	539	off = (s->addr & PAGE_MASK) + s->offset;
	540	soff = SECTOR_OFFSET(s->addr);
	541	if (bdrv_read(s->bdrv, sector, iobuf, PAGE_SECTORS) == -1) {
	542	printf("%s: read error in sector %i\n", __FUNCTION__, sector);
	543	return;
	544	}
	545
	546	memcpy(iobuf + (soff \| off), s->io, MIN(s->iolen, PAGE_SIZE - off));
	547	if (off + s->iolen > PAGE_SIZE) {
	548	page = PAGE(s->addr);
	549	memcpy(s->storage + (page << OOB_SHIFT), s->io + PAGE_SIZE - off,
	550	MIN(OOB_SIZE, off + s->iolen - PAGE_SIZE));
	551	}
	552
	553	if (bdrv_write(s->bdrv, sector, iobuf, PAGE_SECTORS) == -1)
	554	printf("%s: write error in sector %i\n", __FUNCTION__, sector);
	555	} else {
	556	off = PAGE_START(s->addr) + (s->addr & PAGE_MASK) + s->offset;
	557	sector = off >> 9;
	558	soff = off & 0x1ff;
	559	if (bdrv_read(s->bdrv, sector, iobuf, PAGE_SECTORS + 2) == -1) {
	560	printf("%s: read error in sector %i\n", __FUNCTION__, sector);
	561	return;
	562	}
	563
	564	memcpy(iobuf + soff, s->io, s->iolen);
	565
	566	if (bdrv_write(s->bdrv, sector, iobuf, PAGE_SECTORS + 2) == -1)
	567	printf("%s: write error in sector %i\n", __FUNCTION__, sector);
	568	}
	569	s->offset = 0;
	570	}
	571
	572	/* Erase a single block */
bc24a225	573	static void glue(nand_blk_erase_, PAGE_SIZE)(NANDFlashState *s)
3e3d5815 AZ	574	{
	575	uint32_t i, page, addr;
	576	uint8_t iobuf[0x200] = { [0 ... 0x1ff] = 0xff, };
	577	addr = s->addr & ~((1 << (ADDR_SHIFT + s->erase_shift)) - 1);
	578
	579	if (PAGE(addr) >= s->pages)
	580	return;
	581
	582	if (!s->bdrv) {
	583	memset(s->storage + PAGE_START(addr),
	584	0xff, (PAGE_SIZE + OOB_SIZE) << s->erase_shift);
	585	} else if (s->mem_oob) {
	586	memset(s->storage + (PAGE(addr) << OOB_SHIFT),
	587	0xff, OOB_SIZE << s->erase_shift);
	588	i = SECTOR(addr);
	589	page = SECTOR(addr + (ADDR_SHIFT + s->erase_shift));
	590	for (; i < page; i ++)
	591	if (bdrv_write(s->bdrv, i, iobuf, 1) == -1)
	592	printf("%s: write error in sector %i\n", __FUNCTION__, i);
	593	} else {
	594	addr = PAGE_START(addr);
	595	page = addr >> 9;
	596	if (bdrv_read(s->bdrv, page, iobuf, 1) == -1)
	597	printf("%s: read error in sector %i\n", __FUNCTION__, page);
	598	memset(iobuf + (addr & 0x1ff), 0xff, (~addr & 0x1ff) + 1);
	599	if (bdrv_write(s->bdrv, page, iobuf, 1) == -1)
	600	printf("%s: write error in sector %i\n", __FUNCTION__, page);
	601
	602	memset(iobuf, 0xff, 0x200);
	603	i = (addr & ~0x1ff) + 0x200;
	604	for (addr += ((PAGE_SIZE + OOB_SIZE) << s->erase_shift) - 0x200;
	605	i < addr; i += 0x200)
	606	if (bdrv_write(s->bdrv, i >> 9, iobuf, 1) == -1)
	607	printf("%s: write error in sector %i\n", __FUNCTION__, i >> 9);
	608
	609	page = i >> 9;
	610	if (bdrv_read(s->bdrv, page, iobuf, 1) == -1)
	611	printf("%s: read error in sector %i\n", __FUNCTION__, page);
a07dec22	612	memset(iobuf, 0xff, ((addr - 1) & 0x1ff) + 1);
3e3d5815 AZ	613	if (bdrv_write(s->bdrv, page, iobuf, 1) == -1)
	614	printf("%s: write error in sector %i\n", __FUNCTION__, page);
	615	}
	616	}
	617
bc24a225	618	static void glue(nand_blk_load_, PAGE_SIZE)(NANDFlashState *s,
3e3d5815 AZ	619	uint32_t addr, int offset)
	620	{
	621	if (PAGE(addr) >= s->pages)
	622	return;
	623
	624	if (s->bdrv) {
	625	if (s->mem_oob) {
	626	if (bdrv_read(s->bdrv, SECTOR(addr), s->io, PAGE_SECTORS) == -1)
	627	printf("%s: read error in sector %i\n",
	628	__FUNCTION__, SECTOR(addr));
	629	memcpy(s->io + SECTOR_OFFSET(s->addr) + PAGE_SIZE,
	630	s->storage + (PAGE(s->addr) << OOB_SHIFT),
	631	OOB_SIZE);
	632	s->ioaddr = s->io + SECTOR_OFFSET(s->addr) + offset;
	633	} else {
	634	if (bdrv_read(s->bdrv, PAGE_START(addr) >> 9,
	635	s->io, (PAGE_SECTORS + 2)) == -1)
	636	printf("%s: read error in sector %i\n",
	637	__FUNCTION__, PAGE_START(addr) >> 9);
	638	s->ioaddr = s->io + (PAGE_START(addr) & 0x1ff) + offset;
	639	}
	640	} else {
	641	memcpy(s->io, s->storage + PAGE_START(s->addr) +
	642	offset, PAGE_SIZE + OOB_SIZE - offset);
	643	s->ioaddr = s->io;
	644	}
3e3d5815 AZ	645	}
3e3d5815 AZ	646
bc24a225	647	static void glue(nand_init_, PAGE_SIZE)(NANDFlashState *s)
3e3d5815 AZ	648	{
	649	s->oob_shift = PAGE_SHIFT - 5;
	650	s->pages = s->size >> PAGE_SHIFT;
	651	s->addr_shift = ADDR_SHIFT;
	652
	653	s->blk_erase = glue(nand_blk_erase_, PAGE_SIZE);
	654	s->blk_write = glue(nand_blk_write_, PAGE_SIZE);
	655	s->blk_load = glue(nand_blk_load_, PAGE_SIZE);
	656	}
	657
	658	# undef PAGE_SIZE
	659	# undef PAGE_SHIFT
	660	# undef PAGE_SECTORS
	661	# undef ADDR_SHIFT
	662	#endif /* NAND_IO */