[qemu.git] / hw / sd / pxa2xx_mmci.c

/*
 * Intel XScale PXA255/270 MultiMediaCard/SD/SDIO Controller emulation.
 *
 * Copyright (c) 2006 Openedhand Ltd.
 * Written by Andrzej Zaborowski <[email protected]>
 *
 * This code is licensed under the GPLv2.
 *
 * Contributions after 2012-01-13 are licensed under the terms of the
 * GNU GPL, version 2 or (at your option) any later version.
 */

#include "hw/hw.h"
#include "hw/arm/pxa.h"
#include "hw/sd.h"
#include "hw/qdev.h"

struct PXA2xxMMCIState {
    MemoryRegion iomem;
    qemu_irq irq;
    qemu_irq rx_dma;
    qemu_irq tx_dma;

    SDState *card;

    uint32_t status;
    uint32_t clkrt;
    uint32_t spi;
    uint32_t cmdat;
    uint32_t resp_tout;
    uint32_t read_tout;
    int blklen;
    int numblk;
    uint32_t intmask;
    uint32_t intreq;
    int cmd;
    uint32_t arg;

    int active;
    int bytesleft;
    uint8_t tx_fifo[64];
    int tx_start;
    int tx_len;
    uint8_t rx_fifo[32];
    int rx_start;
    int rx_len;
    uint16_t resp_fifo[9];
    int resp_len;

    int cmdreq;
    int ac_width;
};

#define MMC_STRPCL	0x00	/* MMC Clock Start/Stop register */
#define MMC_STAT	0x04	/* MMC Status register */
#define MMC_CLKRT	0x08	/* MMC Clock Rate register */
#define MMC_SPI		0x0c	/* MMC SPI Mode register */
#define MMC_CMDAT	0x10	/* MMC Command/Data register */
#define MMC_RESTO	0x14	/* MMC Response Time-Out register */
#define MMC_RDTO	0x18	/* MMC Read Time-Out register */
#define MMC_BLKLEN	0x1c	/* MMC Block Length register */
#define MMC_NUMBLK	0x20	/* MMC Number of Blocks register */
#define MMC_PRTBUF	0x24	/* MMC Buffer Partly Full register */
#define MMC_I_MASK	0x28	/* MMC Interrupt Mask register */
#define MMC_I_REG	0x2c	/* MMC Interrupt Request register */
#define MMC_CMD		0x30	/* MMC Command register */
#define MMC_ARGH	0x34	/* MMC Argument High register */
#define MMC_ARGL	0x38	/* MMC Argument Low register */
#define MMC_RES		0x3c	/* MMC Response FIFO */
#define MMC_RXFIFO	0x40	/* MMC Receive FIFO */
#define MMC_TXFIFO	0x44	/* MMC Transmit FIFO */
#define MMC_RDWAIT	0x48	/* MMC RD_WAIT register */
#define MMC_BLKS_REM	0x4c	/* MMC Blocks Remaining register */

/* Bitfield masks */
#define STRPCL_STOP_CLK	(1 << 0)
#define STRPCL_STRT_CLK	(1 << 1)
#define STAT_TOUT_RES	(1 << 1)
#define STAT_CLK_EN	(1 << 8)
#define STAT_DATA_DONE	(1 << 11)
#define STAT_PRG_DONE	(1 << 12)
#define STAT_END_CMDRES	(1 << 13)
#define SPI_SPI_MODE	(1 << 0)
#define CMDAT_RES_TYPE	(3 << 0)
#define CMDAT_DATA_EN	(1 << 2)
#define CMDAT_WR_RD	(1 << 3)
#define CMDAT_DMA_EN	(1 << 7)
#define CMDAT_STOP_TRAN	(1 << 10)
#define INT_DATA_DONE	(1 << 0)
#define INT_PRG_DONE	(1 << 1)
#define INT_END_CMD	(1 << 2)
#define INT_STOP_CMD	(1 << 3)
#define INT_CLK_OFF	(1 << 4)
#define INT_RXFIFO_REQ	(1 << 5)
#define INT_TXFIFO_REQ	(1 << 6)
#define INT_TINT	(1 << 7)
#define INT_DAT_ERR	(1 << 8)
#define INT_RES_ERR	(1 << 9)
#define INT_RD_STALLED	(1 << 10)
#define INT_SDIO_INT	(1 << 11)
#define INT_SDIO_SACK	(1 << 12)
#define PRTBUF_PRT_BUF	(1 << 0)

/* Route internal interrupt lines to the global IC and DMA */
static void pxa2xx_mmci_int_update(PXA2xxMMCIState *s)
{
    uint32_t mask = s->intmask;
    if (s->cmdat & CMDAT_DMA_EN) {
        mask |= INT_RXFIFO_REQ | INT_TXFIFO_REQ;

        qemu_set_irq(s->rx_dma, !!(s->intreq & INT_RXFIFO_REQ));
        qemu_set_irq(s->tx_dma, !!(s->intreq & INT_TXFIFO_REQ));
    }

    qemu_set_irq(s->irq, !!(s->intreq & ~mask));
}

static void pxa2xx_mmci_fifo_update(PXA2xxMMCIState *s)
{
    if (!s->active)
        return;

    if (s->cmdat & CMDAT_WR_RD) {
        while (s->bytesleft && s->tx_len) {
            sd_write_data(s->card, s->tx_fifo[s->tx_start ++]);
            s->tx_start &= 0x1f;
            s->tx_len --;
            s->bytesleft --;
        }
        if (s->bytesleft)
            s->intreq |= INT_TXFIFO_REQ;
    } else
        while (s->bytesleft && s->rx_len < 32) {
            s->rx_fifo[(s->rx_start + (s->rx_len ++)) & 0x1f] =
                sd_read_data(s->card);
            s->bytesleft --;
            s->intreq |= INT_RXFIFO_REQ;
        }

    if (!s->bytesleft) {
        s->active = 0;
        s->intreq |= INT_DATA_DONE;
        s->status |= STAT_DATA_DONE;

        if (s->cmdat & CMDAT_WR_RD) {
            s->intreq |= INT_PRG_DONE;
            s->status |= STAT_PRG_DONE;
        }
    }

    pxa2xx_mmci_int_update(s);
}

static void pxa2xx_mmci_wakequeues(PXA2xxMMCIState *s)
{
    int rsplen, i;
    SDRequest request;
    uint8_t response[16];

    s->active = 1;
    s->rx_len = 0;
    s->tx_len = 0;
    s->cmdreq = 0;

    request.cmd = s->cmd;
    request.arg = s->arg;
    request.crc = 0;	/* FIXME */

    rsplen = sd_do_command(s->card, &request, response);
    s->intreq |= INT_END_CMD;

    memset(s->resp_fifo, 0, sizeof(s->resp_fifo));
    switch (s->cmdat & CMDAT_RES_TYPE) {
#define PXAMMCI_RESP(wd, value0, value1)	\
        s->resp_fifo[(wd) + 0] |= (value0);	\
        s->resp_fifo[(wd) + 1] |= (value1) << 8;
    case 0:	/* No response */
        goto complete;

    case 1:	/* R1, R4, R5 or R6 */
        if (rsplen < 4)
            goto timeout;
        goto complete;

    case 2:	/* R2 */
        if (rsplen < 16)
            goto timeout;
        goto complete;

    case 3:	/* R3 */
        if (rsplen < 4)
            goto timeout;
        goto complete;

    complete:
        for (i = 0; rsplen > 0; i ++, rsplen -= 2) {
            PXAMMCI_RESP(i, response[i * 2], response[i * 2 + 1]);
        }
        s->status |= STAT_END_CMDRES;

        if (!(s->cmdat & CMDAT_DATA_EN))
            s->active = 0;
        else
            s->bytesleft = s->numblk * s->blklen;

        s->resp_len = 0;
        break;

    timeout:
        s->active = 0;
        s->status |= STAT_TOUT_RES;
        break;
    }

    pxa2xx_mmci_fifo_update(s);
}

static uint32_t pxa2xx_mmci_read(void *opaque, hwaddr offset)
{
    PXA2xxMMCIState *s = (PXA2xxMMCIState *) opaque;
    uint32_t ret;

    switch (offset) {
    case MMC_STRPCL:
        return 0;
    case MMC_STAT:
        return s->status;
    case MMC_CLKRT:
        return s->clkrt;
    case MMC_SPI:
        return s->spi;
    case MMC_CMDAT:
        return s->cmdat;
    case MMC_RESTO:
        return s->resp_tout;
    case MMC_RDTO:
        return s->read_tout;
    case MMC_BLKLEN:
        return s->blklen;
    case MMC_NUMBLK:
        return s->numblk;
    case MMC_PRTBUF:
        return 0;
    case MMC_I_MASK:
        return s->intmask;
    case MMC_I_REG:
        return s->intreq;
    case MMC_CMD:
        return s->cmd | 0x40;
    case MMC_ARGH:
        return s->arg >> 16;
    case MMC_ARGL:
        return s->arg & 0xffff;
    case MMC_RES:
        if (s->resp_len < 9)
            return s->resp_fifo[s->resp_len ++];
        return 0;
    case MMC_RXFIFO:
        ret = 0;
        while (s->ac_width -- && s->rx_len) {
            ret |= s->rx_fifo[s->rx_start ++] << (s->ac_width << 3);
            s->rx_start &= 0x1f;
            s->rx_len --;
        }
        s->intreq &= ~INT_RXFIFO_REQ;
        pxa2xx_mmci_fifo_update(s);
        return ret;
    case MMC_RDWAIT:
        return 0;
    case MMC_BLKS_REM:
        return s->numblk;
    default:
        hw_error("%s: Bad offset " REG_FMT "\n", __FUNCTION__, offset);
    }

    return 0;
}

static void pxa2xx_mmci_write(void *opaque,
                hwaddr offset, uint32_t value)
{
    PXA2xxMMCIState *s = (PXA2xxMMCIState *) opaque;

    switch (offset) {
    case MMC_STRPCL:
        if (value & STRPCL_STRT_CLK) {
            s->status |= STAT_CLK_EN;
            s->intreq &= ~INT_CLK_OFF;

            if (s->cmdreq && !(s->cmdat & CMDAT_STOP_TRAN)) {
                s->status &= STAT_CLK_EN;
                pxa2xx_mmci_wakequeues(s);
            }
        }

        if (value & STRPCL_STOP_CLK) {
            s->status &= ~STAT_CLK_EN;
            s->intreq |= INT_CLK_OFF;
            s->active = 0;
        }

        pxa2xx_mmci_int_update(s);
        break;

    case MMC_CLKRT:
        s->clkrt = value & 7;
        break;

    case MMC_SPI:
        s->spi = value & 0xf;
        if (value & SPI_SPI_MODE)
            printf("%s: attempted to use card in SPI mode\n", __FUNCTION__);
        break;

    case MMC_CMDAT:
        s->cmdat = value & 0x3dff;
        s->active = 0;
        s->cmdreq = 1;
        if (!(value & CMDAT_STOP_TRAN)) {
            s->status &= STAT_CLK_EN;

            if (s->status & STAT_CLK_EN)
                pxa2xx_mmci_wakequeues(s);
        }

        pxa2xx_mmci_int_update(s);
        break;

    case MMC_RESTO:
        s->resp_tout = value & 0x7f;
        break;

    case MMC_RDTO:
        s->read_tout = value & 0xffff;
        break;

    case MMC_BLKLEN:
        s->blklen = value & 0xfff;
        break;

    case MMC_NUMBLK:
        s->numblk = value & 0xffff;
        break;

    case MMC_PRTBUF:
        if (value & PRTBUF_PRT_BUF) {
            s->tx_start ^= 32;
            s->tx_len = 0;
        }
        pxa2xx_mmci_fifo_update(s);
        break;

    case MMC_I_MASK:
        s->intmask = value & 0x1fff;
        pxa2xx_mmci_int_update(s);
        break;

    case MMC_CMD:
        s->cmd = value & 0x3f;
        break;

    case MMC_ARGH:
        s->arg &= 0x0000ffff;
        s->arg |= value << 16;
        break;

    case MMC_ARGL:
        s->arg &= 0xffff0000;
        s->arg |= value & 0x0000ffff;
        break;

    case MMC_TXFIFO:
        while (s->ac_width -- && s->tx_len < 0x20)
            s->tx_fifo[(s->tx_start + (s->tx_len ++)) & 0x1f] =
                    (value >> (s->ac_width << 3)) & 0xff;
        s->intreq &= ~INT_TXFIFO_REQ;
        pxa2xx_mmci_fifo_update(s);
        break;

    case MMC_RDWAIT:
    case MMC_BLKS_REM:
        break;

    default:
        hw_error("%s: Bad offset " REG_FMT "\n", __FUNCTION__, offset);
    }
}

static uint32_t pxa2xx_mmci_readb(void *opaque, hwaddr offset)
{
    PXA2xxMMCIState *s = (PXA2xxMMCIState *) opaque;
    s->ac_width = 1;
    return pxa2xx_mmci_read(opaque, offset);
}

static uint32_t pxa2xx_mmci_readh(void *opaque, hwaddr offset)
{
    PXA2xxMMCIState *s = (PXA2xxMMCIState *) opaque;
    s->ac_width = 2;
    return pxa2xx_mmci_read(opaque, offset);
}

static uint32_t pxa2xx_mmci_readw(void *opaque, hwaddr offset)
{
    PXA2xxMMCIState *s = (PXA2xxMMCIState *) opaque;
    s->ac_width = 4;
    return pxa2xx_mmci_read(opaque, offset);
}

static void pxa2xx_mmci_writeb(void *opaque,
                hwaddr offset, uint32_t value)
{
    PXA2xxMMCIState *s = (PXA2xxMMCIState *) opaque;
    s->ac_width = 1;
    pxa2xx_mmci_write(opaque, offset, value);
}

static void pxa2xx_mmci_writeh(void *opaque,
                hwaddr offset, uint32_t value)
{
    PXA2xxMMCIState *s = (PXA2xxMMCIState *) opaque;
    s->ac_width = 2;
    pxa2xx_mmci_write(opaque, offset, value);
}

static void pxa2xx_mmci_writew(void *opaque,
                hwaddr offset, uint32_t value)
{
    PXA2xxMMCIState *s = (PXA2xxMMCIState *) opaque;
    s->ac_width = 4;
    pxa2xx_mmci_write(opaque, offset, value);
}

static const MemoryRegionOps pxa2xx_mmci_ops = {
    .old_mmio = {
        .read = { pxa2xx_mmci_readb,
                  pxa2xx_mmci_readh,
                  pxa2xx_mmci_readw, },
        .write = { pxa2xx_mmci_writeb,
                   pxa2xx_mmci_writeh,
                   pxa2xx_mmci_writew, },
    },
    .endianness = DEVICE_NATIVE_ENDIAN,
};

static void pxa2xx_mmci_save(QEMUFile *f, void *opaque)
{
    PXA2xxMMCIState *s = (PXA2xxMMCIState *) opaque;
    int i;

    qemu_put_be32s(f, &s->status);
    qemu_put_be32s(f, &s->clkrt);
    qemu_put_be32s(f, &s->spi);
    qemu_put_be32s(f, &s->cmdat);
    qemu_put_be32s(f, &s->resp_tout);
    qemu_put_be32s(f, &s->read_tout);
    qemu_put_be32(f, s->blklen);
    qemu_put_be32(f, s->numblk);
    qemu_put_be32s(f, &s->intmask);
    qemu_put_be32s(f, &s->intreq);
    qemu_put_be32(f, s->cmd);
    qemu_put_be32s(f, &s->arg);
    qemu_put_be32(f, s->cmdreq);
    qemu_put_be32(f, s->active);
    qemu_put_be32(f, s->bytesleft);

    qemu_put_byte(f, s->tx_len);
    for (i = 0; i < s->tx_len; i ++)
        qemu_put_byte(f, s->tx_fifo[(s->tx_start + i) & 63]);

    qemu_put_byte(f, s->rx_len);
    for (i = 0; i < s->rx_len; i ++)
        qemu_put_byte(f, s->rx_fifo[(s->rx_start + i) & 31]);

    qemu_put_byte(f, s->resp_len);
    for (i = s->resp_len; i < 9; i ++)
        qemu_put_be16s(f, &s->resp_fifo[i]);
}

static int pxa2xx_mmci_load(QEMUFile *f, void *opaque, int version_id)
{
    PXA2xxMMCIState *s = (PXA2xxMMCIState *) opaque;
    int i;

    qemu_get_be32s(f, &s->status);
    qemu_get_be32s(f, &s->clkrt);
    qemu_get_be32s(f, &s->spi);
    qemu_get_be32s(f, &s->cmdat);
    qemu_get_be32s(f, &s->resp_tout);
    qemu_get_be32s(f, &s->read_tout);
    s->blklen = qemu_get_be32(f);
    s->numblk = qemu_get_be32(f);
    qemu_get_be32s(f, &s->intmask);
    qemu_get_be32s(f, &s->intreq);
    s->cmd = qemu_get_be32(f);
    qemu_get_be32s(f, &s->arg);
    s->cmdreq = qemu_get_be32(f);
    s->active = qemu_get_be32(f);
    s->bytesleft = qemu_get_be32(f);

    s->tx_len = qemu_get_byte(f);
    s->tx_start = 0;
    if (s->tx_len >= sizeof(s->tx_fifo) || s->tx_len < 0)
        return -EINVAL;
    for (i = 0; i < s->tx_len; i ++)
        s->tx_fifo[i] = qemu_get_byte(f);

    s->rx_len = qemu_get_byte(f);
    s->rx_start = 0;
    if (s->rx_len >= sizeof(s->rx_fifo) || s->rx_len < 0)
        return -EINVAL;
    for (i = 0; i < s->rx_len; i ++)
        s->rx_fifo[i] = qemu_get_byte(f);

    s->resp_len = qemu_get_byte(f);
    if (s->resp_len > 9 || s->resp_len < 0)
        return -EINVAL;
    for (i = s->resp_len; i < 9; i ++)
         qemu_get_be16s(f, &s->resp_fifo[i]);

    return 0;
}

PXA2xxMMCIState *pxa2xx_mmci_init(MemoryRegion *sysmem,
                hwaddr base,
                BlockDriverState *bd, qemu_irq irq,
                qemu_irq rx_dma, qemu_irq tx_dma)
{
    PXA2xxMMCIState *s;

    s = (PXA2xxMMCIState *) g_malloc0(sizeof(PXA2xxMMCIState));
    s->irq = irq;
    s->rx_dma = rx_dma;
    s->tx_dma = tx_dma;

    memory_region_init_io(&s->iomem, NULL, &pxa2xx_mmci_ops, s,
                          "pxa2xx-mmci", 0x00100000);
    memory_region_add_subregion(sysmem, base, &s->iomem);

    /* Instantiate the actual storage */
    s->card = sd_init(bd, false);
    if (s->card == NULL) {
        exit(1);
    }

    register_savevm(NULL, "pxa2xx_mmci", 0, 0,
                    pxa2xx_mmci_save, pxa2xx_mmci_load, s);

    return s;
}

void pxa2xx_mmci_handlers(PXA2xxMMCIState *s, qemu_irq readonly,
                qemu_irq coverswitch)
{
    sd_set_cb(s->card, readonly, coverswitch);
}
Commit	Line	Data
a171fe39 AZ	1	/*
	2	* Intel XScale PXA255/270 MultiMediaCard/SD/SDIO Controller emulation.
	3	*
	4	* Copyright (c) 2006 Openedhand Ltd.
	5	* Written by Andrzej Zaborowski <[email protected]>
	6	*
	7	* This code is licensed under the GPLv2.
6b620ca3 PB	8	*
	9	* Contributions after 2012-01-13 are licensed under the terms of the
	10	* GNU GPL, version 2 or (at your option) any later version.
a171fe39 AZ	11	*/
a171fe39 AZ	12
83c9f4ca	13	#include "hw/hw.h"
0d09e41a	14	#include "hw/arm/pxa.h"
83c9f4ca PB	15	#include "hw/sd.h"
83c9f4ca PB	16	#include "hw/qdev.h"
a171fe39	17
bc24a225	18	struct PXA2xxMMCIState {
2bf90458	19	MemoryRegion iomem;
a171fe39	20	qemu_irq irq;
2115c019 AZ	21	qemu_irq rx_dma;
2115c019 AZ	22	qemu_irq tx_dma;
a171fe39 AZ	23
	24	SDState *card;
	25
	26	uint32_t status;
	27	uint32_t clkrt;
	28	uint32_t spi;
	29	uint32_t cmdat;
	30	uint32_t resp_tout;
	31	uint32_t read_tout;
	32	int blklen;
	33	int numblk;
	34	uint32_t intmask;
	35	uint32_t intreq;
	36	int cmd;
	37	uint32_t arg;
	38
	39	int active;
	40	int bytesleft;
	41	uint8_t tx_fifo[64];
	42	int tx_start;
	43	int tx_len;
	44	uint8_t rx_fifo[32];
	45	int rx_start;
	46	int rx_len;
	47	uint16_t resp_fifo[9];
	48	int resp_len;
	49
	50	int cmdreq;
	51	int ac_width;
	52	};
	53
	54	#define MMC_STRPCL 0x00 /* MMC Clock Start/Stop register */
	55	#define MMC_STAT 0x04 /* MMC Status register */
	56	#define MMC_CLKRT 0x08 /* MMC Clock Rate register */
	57	#define MMC_SPI 0x0c /* MMC SPI Mode register */
	58	#define MMC_CMDAT 0x10 /* MMC Command/Data register */
	59	#define MMC_RESTO 0x14 /* MMC Response Time-Out register */
	60	#define MMC_RDTO 0x18 /* MMC Read Time-Out register */
	61	#define MMC_BLKLEN 0x1c /* MMC Block Length register */
	62	#define MMC_NUMBLK 0x20 /* MMC Number of Blocks register */
	63	#define MMC_PRTBUF 0x24 /* MMC Buffer Partly Full register */
	64	#define MMC_I_MASK 0x28 /* MMC Interrupt Mask register */
	65	#define MMC_I_REG 0x2c /* MMC Interrupt Request register */
	66	#define MMC_CMD 0x30 /* MMC Command register */
	67	#define MMC_ARGH 0x34 /* MMC Argument High register */
	68	#define MMC_ARGL 0x38 /* MMC Argument Low register */
	69	#define MMC_RES 0x3c /* MMC Response FIFO */
	70	#define MMC_RXFIFO 0x40 /* MMC Receive FIFO */
	71	#define MMC_TXFIFO 0x44 /* MMC Transmit FIFO */
	72	#define MMC_RDWAIT 0x48 /* MMC RD_WAIT register */
	73	#define MMC_BLKS_REM 0x4c /* MMC Blocks Remaining register */
	74
	75	/* Bitfield masks */
	76	#define STRPCL_STOP_CLK (1 << 0)
	77	#define STRPCL_STRT_CLK (1 << 1)
	78	#define STAT_TOUT_RES (1 << 1)
	79	#define STAT_CLK_EN (1 << 8)
	80	#define STAT_DATA_DONE (1 << 11)
	81	#define STAT_PRG_DONE (1 << 12)
	82	#define STAT_END_CMDRES (1 << 13)
	83	#define SPI_SPI_MODE (1 << 0)
	84	#define CMDAT_RES_TYPE (3 << 0)
	85	#define CMDAT_DATA_EN (1 << 2)
	86	#define CMDAT_WR_RD (1 << 3)
87	#define CMDAT_DMA_EN (1 << 7)
88	#define CMDAT_STOP_TRAN (1 << 10)
89	#define INT_DATA_DONE (1 << 0)
90	#define INT_PRG_DONE (1 << 1)
91	#define INT_END_CMD (1 << 2)
92	#define INT_STOP_CMD (1 << 3)
93	#define INT_CLK_OFF (1 << 4)
94	#define INT_RXFIFO_REQ (1 << 5)
95	#define INT_TXFIFO_REQ (1 << 6)
96	#define INT_TINT (1 << 7)
97	#define INT_DAT_ERR (1 << 8)
98	#define INT_RES_ERR (1 << 9)
99	#define INT_RD_STALLED (1 << 10)
100	#define INT_SDIO_INT (1 << 11)
101	#define INT_SDIO_SACK (1 << 12)
102	#define PRTBUF_PRT_BUF (1 << 0)
103
104	/* Route internal interrupt lines to the global IC and DMA */
bc24a225	105	static void pxa2xx_mmci_int_update(PXA2xxMMCIState *s)
a171fe39 AZ	106	{
	107	uint32_t mask = s->intmask;
	108	if (s->cmdat & CMDAT_DMA_EN) {
	109	mask \|= INT_RXFIFO_REQ \| INT_TXFIFO_REQ;
	110
2115c019 AZ	111	qemu_set_irq(s->rx_dma, !!(s->intreq & INT_RXFIFO_REQ));
2115c019 AZ	112	qemu_set_irq(s->tx_dma, !!(s->intreq & INT_TXFIFO_REQ));
a171fe39 AZ	113	}
	114
	115	qemu_set_irq(s->irq, !!(s->intreq & ~mask));
	116	}
	117
bc24a225	118	static void pxa2xx_mmci_fifo_update(PXA2xxMMCIState *s)
a171fe39 AZ	119	{
	120	if (!s->active)
	121	return;
	122
	123	if (s->cmdat & CMDAT_WR_RD) {
	124	while (s->bytesleft && s->tx_len) {
	125	sd_write_data(s->card, s->tx_fifo[s->tx_start ++]);
	126	s->tx_start &= 0x1f;
	127	s->tx_len --;
	128	s->bytesleft --;
	129	}
	130	if (s->bytesleft)
	131	s->intreq \|= INT_TXFIFO_REQ;
	132	} else
	133	while (s->bytesleft && s->rx_len < 32) {
	134	s->rx_fifo[(s->rx_start + (s->rx_len ++)) & 0x1f] =
	135	sd_read_data(s->card);
	136	s->bytesleft --;
	137	s->intreq \|= INT_RXFIFO_REQ;
	138	}
	139
	140	if (!s->bytesleft) {
	141	s->active = 0;
	142	s->intreq \|= INT_DATA_DONE;
	143	s->status \|= STAT_DATA_DONE;
	144
	145	if (s->cmdat & CMDAT_WR_RD) {
	146	s->intreq \|= INT_PRG_DONE;
	147	s->status \|= STAT_PRG_DONE;
	148	}
	149	}
	150
	151	pxa2xx_mmci_int_update(s);
	152	}
	153
bc24a225	154	static void pxa2xx_mmci_wakequeues(PXA2xxMMCIState *s)
a171fe39 AZ	155	{
a171fe39 AZ	156	int rsplen, i;
bc24a225	157	SDRequest request;
a171fe39 AZ	158	uint8_t response[16];
	159
	160	s->active = 1;
	161	s->rx_len = 0;
	162	s->tx_len = 0;
	163	s->cmdreq = 0;
	164
	165	request.cmd = s->cmd;
	166	request.arg = s->arg;
	167	request.crc = 0; /* FIXME */
	168
	169	rsplen = sd_do_command(s->card, &request, response);
	170	s->intreq \|= INT_END_CMD;
	171
	172	memset(s->resp_fifo, 0, sizeof(s->resp_fifo));
	173	switch (s->cmdat & CMDAT_RES_TYPE) {
	174	#define PXAMMCI_RESP(wd, value0, value1) \
	175	s->resp_fifo[(wd) + 0] \|= (value0); \
	176	s->resp_fifo[(wd) + 1] \|= (value1) << 8;
	177	case 0: /* No response */
	178	goto complete;
	179
	180	case 1: /* R1, R4, R5 or R6 */
	181	if (rsplen < 4)
	182	goto timeout;
	183	goto complete;
	184
	185	case 2: /* R2 */
	186	if (rsplen < 16)
	187	goto timeout;
	188	goto complete;
	189
	190	case 3: /* R3 */
	191	if (rsplen < 4)
	192	goto timeout;
	193	goto complete;
	194
	195	complete:
	196	for (i = 0; rsplen > 0; i ++, rsplen -= 2) {
	197	PXAMMCI_RESP(i, response[i * 2], response[i * 2 + 1]);
	198	}
	199	s->status \|= STAT_END_CMDRES;
	200
	201	if (!(s->cmdat & CMDAT_DATA_EN))
	202	s->active = 0;
	203	else
	204	s->bytesleft = s->numblk * s->blklen;
	205
	206	s->resp_len = 0;
	207	break;
	208
	209	timeout:
	210	s->active = 0;
	211	s->status \|= STAT_TOUT_RES;
	212	break;
	213	}
	214
	215	pxa2xx_mmci_fifo_update(s);
	216	}
	217
a8170e5e	218	static uint32_t pxa2xx_mmci_read(void *opaque, hwaddr offset)
a171fe39	219	{
bc24a225	220	PXA2xxMMCIState s = (PXA2xxMMCIState ) opaque;
a171fe39	221	uint32_t ret;
a171fe39 AZ	222
	223	switch (offset) {
	224	case MMC_STRPCL:
	225	return 0;
	226	case MMC_STAT:
	227	return s->status;
	228	case MMC_CLKRT:
	229	return s->clkrt;
	230	case MMC_SPI:
	231	return s->spi;
	232	case MMC_CMDAT:
	233	return s->cmdat;
	234	case MMC_RESTO:
	235	return s->resp_tout;
	236	case MMC_RDTO:
	237	return s->read_tout;
	238	case MMC_BLKLEN:
	239	return s->blklen;
	240	case MMC_NUMBLK:
	241	return s->numblk;
	242	case MMC_PRTBUF:
	243	return 0;
	244	case MMC_I_MASK:
	245	return s->intmask;
	246	case MMC_I_REG:
	247	return s->intreq;
	248	case MMC_CMD:
	249	return s->cmd \| 0x40;
	250	case MMC_ARGH:
	251	return s->arg >> 16;
	252	case MMC_ARGL:
	253	return s->arg & 0xffff;
	254	case MMC_RES:
	255	if (s->resp_len < 9)
	256	return s->resp_fifo[s->resp_len ++];
	257	return 0;
	258	case MMC_RXFIFO:
	259	ret = 0;
	260	while (s->ac_width -- && s->rx_len) {
	261	ret \|= s->rx_fifo[s->rx_start ++] << (s->ac_width << 3);
	262	s->rx_start &= 0x1f;
	263	s->rx_len --;
	264	}
	265	s->intreq &= ~INT_RXFIFO_REQ;
	266	pxa2xx_mmci_fifo_update(s);
	267	return ret;
	268	case MMC_RDWAIT:
	269	return 0;
	270	case MMC_BLKS_REM:
	271	return s->numblk;
	272	default:
2ac71179	273	hw_error("%s: Bad offset " REG_FMT "\n", __FUNCTION__, offset);
a171fe39 AZ	274	}
	275
	276	return 0;
	277	}
	278
	279	static void pxa2xx_mmci_write(void *opaque,
a8170e5e	280	hwaddr offset, uint32_t value)
a171fe39	281	{
bc24a225	282	PXA2xxMMCIState s = (PXA2xxMMCIState ) opaque;
a171fe39 AZ	283
	284	switch (offset) {
	285	case MMC_STRPCL:
	286	if (value & STRPCL_STRT_CLK) {
	287	s->status \|= STAT_CLK_EN;
	288	s->intreq &= ~INT_CLK_OFF;
	289
	290	if (s->cmdreq && !(s->cmdat & CMDAT_STOP_TRAN)) {
	291	s->status &= STAT_CLK_EN;
	292	pxa2xx_mmci_wakequeues(s);
	293	}
	294	}
	295
	296	if (value & STRPCL_STOP_CLK) {
	297	s->status &= ~STAT_CLK_EN;
	298	s->intreq \|= INT_CLK_OFF;
	299	s->active = 0;
	300	}
	301
	302	pxa2xx_mmci_int_update(s);
	303	break;
	304
	305	case MMC_CLKRT:
	306	s->clkrt = value & 7;
	307	break;
	308
	309	case MMC_SPI:
	310	s->spi = value & 0xf;
	311	if (value & SPI_SPI_MODE)
	312	printf("%s: attempted to use card in SPI mode\n", __FUNCTION__);
	313	break;
	314
	315	case MMC_CMDAT:
	316	s->cmdat = value & 0x3dff;
	317	s->active = 0;
	318	s->cmdreq = 1;
	319	if (!(value & CMDAT_STOP_TRAN)) {
	320	s->status &= STAT_CLK_EN;
	321
	322	if (s->status & STAT_CLK_EN)
	323	pxa2xx_mmci_wakequeues(s);
	324	}
	325
	326	pxa2xx_mmci_int_update(s);
	327	break;
	328
	329	case MMC_RESTO:
	330	s->resp_tout = value & 0x7f;
	331	break;
	332
	333	case MMC_RDTO:
	334	s->read_tout = value & 0xffff;
	335	break;
	336
	337	case MMC_BLKLEN:
	338	s->blklen = value & 0xfff;
	339	break;
	340
	341	case MMC_NUMBLK:
	342	s->numblk = value & 0xffff;
	343	break;
	344
	345	case MMC_PRTBUF:
	346	if (value & PRTBUF_PRT_BUF) {
347	s->tx_start ^= 32;
348	s->tx_len = 0;
349	}
350	pxa2xx_mmci_fifo_update(s);
351	break;
352
353	case MMC_I_MASK:
354	s->intmask = value & 0x1fff;
355	pxa2xx_mmci_int_update(s);
356	break;
357
358	case MMC_CMD:
359	s->cmd = value & 0x3f;
360	break;
361
362	case MMC_ARGH:
363	s->arg &= 0x0000ffff;
364	s->arg \|= value << 16;
365	break;
366
367	case MMC_ARGL:
368	s->arg &= 0xffff0000;
369	s->arg \|= value & 0x0000ffff;
370	break;
371
372	case MMC_TXFIFO:
373	while (s->ac_width -- && s->tx_len < 0x20)
374	s->tx_fifo[(s->tx_start + (s->tx_len ++)) & 0x1f] =
375	(value >> (s->ac_width << 3)) & 0xff;
376	s->intreq &= ~INT_TXFIFO_REQ;
377	pxa2xx_mmci_fifo_update(s);
378	break;
379
380	case MMC_RDWAIT:
381	case MMC_BLKS_REM:
382	break;
383
384	default:
2ac71179	385	hw_error("%s: Bad offset " REG_FMT "\n", __FUNCTION__, offset);
a171fe39 AZ	386	}
	387	}
	388
a8170e5e	389	static uint32_t pxa2xx_mmci_readb(void *opaque, hwaddr offset)
a171fe39	390	{
bc24a225	391	PXA2xxMMCIState s = (PXA2xxMMCIState ) opaque;
a171fe39 AZ	392	s->ac_width = 1;
	393	return pxa2xx_mmci_read(opaque, offset);
	394	}
	395
a8170e5e	396	static uint32_t pxa2xx_mmci_readh(void *opaque, hwaddr offset)
a171fe39	397	{
bc24a225	398	PXA2xxMMCIState s = (PXA2xxMMCIState ) opaque;
a171fe39 AZ	399	s->ac_width = 2;
	400	return pxa2xx_mmci_read(opaque, offset);
	401	}
	402
a8170e5e	403	static uint32_t pxa2xx_mmci_readw(void *opaque, hwaddr offset)
a171fe39	404	{
bc24a225	405	PXA2xxMMCIState s = (PXA2xxMMCIState ) opaque;
a171fe39 AZ	406	s->ac_width = 4;
	407	return pxa2xx_mmci_read(opaque, offset);
	408	}
	409
a171fe39	410	static void pxa2xx_mmci_writeb(void *opaque,
a8170e5e	411	hwaddr offset, uint32_t value)
a171fe39	412	{
bc24a225	413	PXA2xxMMCIState s = (PXA2xxMMCIState ) opaque;
a171fe39 AZ	414	s->ac_width = 1;
	415	pxa2xx_mmci_write(opaque, offset, value);
	416	}
	417
	418	static void pxa2xx_mmci_writeh(void *opaque,
a8170e5e	419	hwaddr offset, uint32_t value)
a171fe39	420	{
bc24a225	421	PXA2xxMMCIState s = (PXA2xxMMCIState ) opaque;
a171fe39 AZ	422	s->ac_width = 2;
	423	pxa2xx_mmci_write(opaque, offset, value);
	424	}
	425
	426	static void pxa2xx_mmci_writew(void *opaque,
a8170e5e	427	hwaddr offset, uint32_t value)
a171fe39	428	{
bc24a225	429	PXA2xxMMCIState s = (PXA2xxMMCIState ) opaque;
a171fe39 AZ	430	s->ac_width = 4;
	431	pxa2xx_mmci_write(opaque, offset, value);
	432	}
	433
2bf90458 BC	434	static const MemoryRegionOps pxa2xx_mmci_ops = {
	435	.old_mmio = {
	436	.read = { pxa2xx_mmci_readb,
	437	pxa2xx_mmci_readh,
	438	pxa2xx_mmci_readw, },
	439	.write = { pxa2xx_mmci_writeb,
	440	pxa2xx_mmci_writeh,
	441	pxa2xx_mmci_writew, },
	442	},
	443	.endianness = DEVICE_NATIVE_ENDIAN,
a171fe39 AZ	444	};
a171fe39 AZ	445
aa941b94 AZ	446	static void pxa2xx_mmci_save(QEMUFile f, void opaque)
aa941b94 AZ	447	{
bc24a225	448	PXA2xxMMCIState s = (PXA2xxMMCIState ) opaque;
aa941b94 AZ	449	int i;
	450
	451	qemu_put_be32s(f, &s->status);
	452	qemu_put_be32s(f, &s->clkrt);
	453	qemu_put_be32s(f, &s->spi);
	454	qemu_put_be32s(f, &s->cmdat);
	455	qemu_put_be32s(f, &s->resp_tout);
	456	qemu_put_be32s(f, &s->read_tout);
	457	qemu_put_be32(f, s->blklen);
	458	qemu_put_be32(f, s->numblk);
	459	qemu_put_be32s(f, &s->intmask);
	460	qemu_put_be32s(f, &s->intreq);
	461	qemu_put_be32(f, s->cmd);
	462	qemu_put_be32s(f, &s->arg);
	463	qemu_put_be32(f, s->cmdreq);
	464	qemu_put_be32(f, s->active);
	465	qemu_put_be32(f, s->bytesleft);
	466
	467	qemu_put_byte(f, s->tx_len);
	468	for (i = 0; i < s->tx_len; i ++)
	469	qemu_put_byte(f, s->tx_fifo[(s->tx_start + i) & 63]);
	470
	471	qemu_put_byte(f, s->rx_len);
	472	for (i = 0; i < s->rx_len; i ++)
	473	qemu_put_byte(f, s->rx_fifo[(s->rx_start + i) & 31]);
	474
	475	qemu_put_byte(f, s->resp_len);
	476	for (i = s->resp_len; i < 9; i ++)
	477	qemu_put_be16s(f, &s->resp_fifo[i]);
	478	}
	479
	480	static int pxa2xx_mmci_load(QEMUFile f, void opaque, int version_id)
	481	{
bc24a225	482	PXA2xxMMCIState s = (PXA2xxMMCIState ) opaque;
aa941b94 AZ	483	int i;
	484
	485	qemu_get_be32s(f, &s->status);
	486	qemu_get_be32s(f, &s->clkrt);
	487	qemu_get_be32s(f, &s->spi);
	488	qemu_get_be32s(f, &s->cmdat);
	489	qemu_get_be32s(f, &s->resp_tout);
	490	qemu_get_be32s(f, &s->read_tout);
	491	s->blklen = qemu_get_be32(f);
	492	s->numblk = qemu_get_be32(f);
	493	qemu_get_be32s(f, &s->intmask);
	494	qemu_get_be32s(f, &s->intreq);
	495	s->cmd = qemu_get_be32(f);
	496	qemu_get_be32s(f, &s->arg);
	497	s->cmdreq = qemu_get_be32(f);
	498	s->active = qemu_get_be32(f);
	499	s->bytesleft = qemu_get_be32(f);
	500
	501	s->tx_len = qemu_get_byte(f);
	502	s->tx_start = 0;
	503	if (s->tx_len >= sizeof(s->tx_fifo) \|\| s->tx_len < 0)
	504	return -EINVAL;
	505	for (i = 0; i < s->tx_len; i ++)
	506	s->tx_fifo[i] = qemu_get_byte(f);
	507
	508	s->rx_len = qemu_get_byte(f);
	509	s->rx_start = 0;
	510	if (s->rx_len >= sizeof(s->rx_fifo) \|\| s->rx_len < 0)
	511	return -EINVAL;
	512	for (i = 0; i < s->rx_len; i ++)
	513	s->rx_fifo[i] = qemu_get_byte(f);
	514
	515	s->resp_len = qemu_get_byte(f);
	516	if (s->resp_len > 9 \|\| s->resp_len < 0)
	517	return -EINVAL;
	518	for (i = s->resp_len; i < 9; i ++)
	519	qemu_get_be16s(f, &s->resp_fifo[i]);
	520
	521	return 0;
	522	}
	523
2bf90458	524	PXA2xxMMCIState pxa2xx_mmci_init(MemoryRegion sysmem,
a8170e5e	525	hwaddr base,
2115c019 AZ	526	BlockDriverState *bd, qemu_irq irq,
2115c019 AZ	527	qemu_irq rx_dma, qemu_irq tx_dma)
a171fe39	528	{
bc24a225	529	PXA2xxMMCIState *s;
a171fe39	530
7267c094	531	s = (PXA2xxMMCIState *) g_malloc0(sizeof(PXA2xxMMCIState));
a171fe39	532	s->irq = irq;
2115c019 AZ	533	s->rx_dma = rx_dma;
2115c019 AZ	534	s->tx_dma = tx_dma;
a171fe39	535
2c9b15ca	536	memory_region_init_io(&s->iomem, NULL, &pxa2xx_mmci_ops, s,
2bf90458 BC	537	"pxa2xx-mmci", 0x00100000);
2bf90458 BC	538	memory_region_add_subregion(sysmem, base, &s->iomem);
a171fe39 AZ	539
a171fe39 AZ	540	/* Instantiate the actual storage */
6790f59d	541	s->card = sd_init(bd, false);
4f8a066b KW	542	if (s->card == NULL) {
	543	exit(1);
	544	}
a171fe39	545
0be71e32	546	register_savevm(NULL, "pxa2xx_mmci", 0, 0,
aa941b94 AZ	547	pxa2xx_mmci_save, pxa2xx_mmci_load, s);
aa941b94 AZ	548
a171fe39 AZ	549	return s;
	550	}
	551
bc24a225	552	void pxa2xx_mmci_handlers(PXA2xxMMCIState *s, qemu_irq readonly,
02ce600c	553	qemu_irq coverswitch)
a171fe39	554	{
e1dad5a6	555	sd_set_cb(s->card, readonly, coverswitch);
a171fe39	556	}