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xemu/hw/pxa2xx_mmci.c
Alexander Graf 2507c12ab0 Add endianness as io mem parameter 
As stated before, devices can be little, big or native endian. The
target endianness is not of their concern, so we need to push things
down a level.

This patch adds a parameter to cpu_register_io_memory that allows a
device to choose its endianness. For now, all devices simply choose
native endian, because that's the same behavior as before.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-12-11 15:24:25 +00:00

548 lines
14 KiB
C
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/*
* Intel XScale PXA255/270 MultiMediaCard/SD/SDIO Controller emulation.
*
* Copyright (c) 2006 Openedhand Ltd.
* Written by Andrzej Zaborowski <balrog@zabor.org>
*
* This code is licensed under the GPLv2.
*/
#include "hw.h"
#include "pxa.h"
#include "sd.h"
struct PXA2xxMMCIState {
qemu_irq irq;
void *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;
pxa2xx_dma_request(s->dma,
PXA2XX_RX_RQ_MMCI, !!(s->intreq & INT_RXFIFO_REQ));
pxa2xx_dma_request(s->dma,
PXA2XX_TX_RQ_MMCI, !!(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, target_phys_addr_t 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,
target_phys_addr_t 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, target_phys_addr_t offset)
{
PXA2xxMMCIState *s = (PXA2xxMMCIState *) opaque;
s->ac_width = 1;
return pxa2xx_mmci_read(opaque, offset);
}
static uint32_t pxa2xx_mmci_readh(void *opaque, target_phys_addr_t offset)
{
PXA2xxMMCIState *s = (PXA2xxMMCIState *) opaque;
s->ac_width = 2;
return pxa2xx_mmci_read(opaque, offset);
}
static uint32_t pxa2xx_mmci_readw(void *opaque, target_phys_addr_t offset)
{
PXA2xxMMCIState *s = (PXA2xxMMCIState *) opaque;
s->ac_width = 4;
return pxa2xx_mmci_read(opaque, offset);
}
static CPUReadMemoryFunc * const pxa2xx_mmci_readfn[] = {
pxa2xx_mmci_readb,
pxa2xx_mmci_readh,
pxa2xx_mmci_readw
};
static void pxa2xx_mmci_writeb(void *opaque,
target_phys_addr_t 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,
target_phys_addr_t 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,
target_phys_addr_t offset, uint32_t value)
{
PXA2xxMMCIState *s = (PXA2xxMMCIState *) opaque;
s->ac_width = 4;
pxa2xx_mmci_write(opaque, offset, value);
}
static CPUWriteMemoryFunc * const pxa2xx_mmci_writefn[] = {
pxa2xx_mmci_writeb,
pxa2xx_mmci_writeh,
pxa2xx_mmci_writew
};
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(target_phys_addr_t base,
BlockDriverState *bd, qemu_irq irq, void *dma)
{
int iomemtype;
PXA2xxMMCIState *s;
s = (PXA2xxMMCIState *) qemu_mallocz(sizeof(PXA2xxMMCIState));
s->irq = irq;
s->dma = dma;
iomemtype = cpu_register_io_memory(pxa2xx_mmci_readfn,
pxa2xx_mmci_writefn, s, DEVICE_NATIVE_ENDIAN);
cpu_register_physical_memory(base, 0x00100000, iomemtype);
/* Instantiate the actual storage */
s->card = sd_init(bd, 0);
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);
}
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