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xemu/hw/sd/pxa2xx_mmci.c
Peter Maydell d637e1dc6d qbus: Rename qbus_create_inplace() to qbus_init() 
Rename qbus_create_inplace() to qbus_init(); this is more in line
with our usual naming convention for functions that in-place
initialize objects.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 20210923121153.23754-5-peter.maydell@linaro.org
2021-09-30 13:42:10 +01:00

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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.
*
* Contributions after 2012-01-13 are licensed under the terms of the
* GNU GPL, version 2 or (at your option) any later version.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "hw/irq.h"
#include "hw/sysbus.h"
#include "migration/vmstate.h"
#include "hw/arm/pxa.h"
#include "hw/sd/sd.h"
#include "hw/qdev-properties.h"
#include "qemu/log.h"
#include "qemu/module.h"
#include "trace.h"
#include "qom/object.h"
#define TYPE_PXA2XX_MMCI_BUS "pxa2xx-mmci-bus"
/* This is reusing the SDBus typedef from SD_BUS */
DECLARE_INSTANCE_CHECKER(SDBus, PXA2XX_MMCI_BUS,
TYPE_PXA2XX_MMCI_BUS)
struct PXA2xxMMCIState {
SysBusDevice parent_obj;
MemoryRegion iomem;
qemu_irq irq;
qemu_irq rx_dma;
qemu_irq tx_dma;
qemu_irq inserted;
qemu_irq readonly;
BlockBackend *blk;
SDBus sdbus;
uint32_t status;
uint32_t clkrt;
uint32_t spi;
uint32_t cmdat;
uint32_t resp_tout;
uint32_t read_tout;
int32_t blklen;
int32_t numblk;
uint32_t intmask;
uint32_t intreq;
int32_t cmd;
uint32_t arg;
int32_t active;
int32_t bytesleft;
uint8_t tx_fifo[64];
uint32_t tx_start;
uint32_t tx_len;
uint8_t rx_fifo[32];
uint32_t rx_start;
uint32_t rx_len;
uint16_t resp_fifo[9];
uint32_t resp_len;
int32_t cmdreq;
};
static bool pxa2xx_mmci_vmstate_validate(void *opaque, int version_id)
{
PXA2xxMMCIState *s = opaque;
return s->tx_start < ARRAY_SIZE(s->tx_fifo)
&& s->rx_start < ARRAY_SIZE(s->rx_fifo)
&& s->tx_len <= ARRAY_SIZE(s->tx_fifo)
&& s->rx_len <= ARRAY_SIZE(s->rx_fifo)
&& s->resp_len <= ARRAY_SIZE(s->resp_fifo);
}
static const VMStateDescription vmstate_pxa2xx_mmci = {
.name = "pxa2xx-mmci",
.version_id = 2,
.minimum_version_id = 2,
.fields = (VMStateField[]) {
VMSTATE_UINT32(status, PXA2xxMMCIState),
VMSTATE_UINT32(clkrt, PXA2xxMMCIState),
VMSTATE_UINT32(spi, PXA2xxMMCIState),
VMSTATE_UINT32(cmdat, PXA2xxMMCIState),
VMSTATE_UINT32(resp_tout, PXA2xxMMCIState),
VMSTATE_UINT32(read_tout, PXA2xxMMCIState),
VMSTATE_INT32(blklen, PXA2xxMMCIState),
VMSTATE_INT32(numblk, PXA2xxMMCIState),
VMSTATE_UINT32(intmask, PXA2xxMMCIState),
VMSTATE_UINT32(intreq, PXA2xxMMCIState),
VMSTATE_INT32(cmd, PXA2xxMMCIState),
VMSTATE_UINT32(arg, PXA2xxMMCIState),
VMSTATE_INT32(cmdreq, PXA2xxMMCIState),
VMSTATE_INT32(active, PXA2xxMMCIState),
VMSTATE_INT32(bytesleft, PXA2xxMMCIState),
VMSTATE_UINT32(tx_start, PXA2xxMMCIState),
VMSTATE_UINT32(tx_len, PXA2xxMMCIState),
VMSTATE_UINT32(rx_start, PXA2xxMMCIState),
VMSTATE_UINT32(rx_len, PXA2xxMMCIState),
VMSTATE_UINT32(resp_len, PXA2xxMMCIState),
VMSTATE_VALIDATE("fifo size incorrect", pxa2xx_mmci_vmstate_validate),
VMSTATE_UINT8_ARRAY(tx_fifo, PXA2xxMMCIState, 64),
VMSTATE_UINT8_ARRAY(rx_fifo, PXA2xxMMCIState, 32),
VMSTATE_UINT16_ARRAY(resp_fifo, PXA2xxMMCIState, 9),
VMSTATE_END_OF_LIST()
}
};
#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) {
sdbus_write_byte(&s->sdbus, 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] =
sdbus_read_byte(&s->sdbus);
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 = sdbus_do_command(&s->sdbus, &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 uint64_t pxa2xx_mmci_read(void *opaque, hwaddr offset, unsigned size)
{
PXA2xxMMCIState *s = (PXA2xxMMCIState *) opaque;
uint32_t ret = 0;
switch (offset) {
case MMC_STRPCL:
break;
case MMC_STAT:
ret = s->status;
break;
case MMC_CLKRT:
ret = s->clkrt;
break;
case MMC_SPI:
ret = s->spi;
break;
case MMC_CMDAT:
ret = s->cmdat;
break;
case MMC_RESTO:
ret = s->resp_tout;
break;
case MMC_RDTO:
ret = s->read_tout;
break;
case MMC_BLKLEN:
ret = s->blklen;
break;
case MMC_NUMBLK:
ret = s->numblk;
break;
case MMC_PRTBUF:
break;
case MMC_I_MASK:
ret = s->intmask;
break;
case MMC_I_REG:
ret = s->intreq;
break;
case MMC_CMD:
ret = s->cmd | 0x40;
break;
case MMC_ARGH:
ret = s->arg >> 16;
break;
case MMC_ARGL:
ret = s->arg & 0xffff;
break;
case MMC_RES:
ret = (s->resp_len < 9) ? s->resp_fifo[s->resp_len++] : 0;
break;
case MMC_RXFIFO:
while (size-- && s->rx_len) {
ret |= s->rx_fifo[s->rx_start++] << (size << 3);
s->rx_start &= 0x1f;
s->rx_len --;
}
s->intreq &= ~INT_RXFIFO_REQ;
pxa2xx_mmci_fifo_update(s);
break;
case MMC_RDWAIT:
break;
case MMC_BLKS_REM:
ret = s->numblk;
break;
default:
qemu_log_mask(LOG_GUEST_ERROR,
"%s: incorrect register 0x%02" HWADDR_PRIx "\n",
__func__, offset);
}
trace_pxa2xx_mmci_read(size, offset, ret);
return ret;
}
static void pxa2xx_mmci_write(void *opaque,
hwaddr offset, uint64_t value, unsigned size)
{
PXA2xxMMCIState *s = (PXA2xxMMCIState *) opaque;
trace_pxa2xx_mmci_write(size, offset, value);
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) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: attempted to use card in SPI mode\n", __func__);
}
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 (size-- && s->tx_len < 0x20)
s->tx_fifo[(s->tx_start + (s->tx_len ++)) & 0x1f] =
(value >> (size << 3)) & 0xff;
s->intreq &= ~INT_TXFIFO_REQ;
pxa2xx_mmci_fifo_update(s);
break;
case MMC_RDWAIT:
case MMC_BLKS_REM:
break;
default:
qemu_log_mask(LOG_GUEST_ERROR,
"%s: incorrect reg 0x%02" HWADDR_PRIx " "
"(value 0x%08" PRIx64 ")\n", __func__, offset, value);
}
}
static const MemoryRegionOps pxa2xx_mmci_ops = {
.read = pxa2xx_mmci_read,
.write = pxa2xx_mmci_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
PXA2xxMMCIState *pxa2xx_mmci_init(MemoryRegion *sysmem,
hwaddr base,
qemu_irq irq, qemu_irq rx_dma, qemu_irq tx_dma)
{
DeviceState *dev;
SysBusDevice *sbd;
dev = qdev_new(TYPE_PXA2XX_MMCI);
sbd = SYS_BUS_DEVICE(dev);
sysbus_mmio_map(sbd, 0, base);
sysbus_connect_irq(sbd, 0, irq);
qdev_connect_gpio_out_named(dev, "rx-dma", 0, rx_dma);
qdev_connect_gpio_out_named(dev, "tx-dma", 0, tx_dma);
sysbus_realize_and_unref(sbd, &error_fatal);
return PXA2XX_MMCI(dev);
}
static void pxa2xx_mmci_set_inserted(DeviceState *dev, bool inserted)
{
PXA2xxMMCIState *s = PXA2XX_MMCI(dev);
qemu_set_irq(s->inserted, inserted);
}
static void pxa2xx_mmci_set_readonly(DeviceState *dev, bool readonly)
{
PXA2xxMMCIState *s = PXA2XX_MMCI(dev);
qemu_set_irq(s->readonly, readonly);
}
void pxa2xx_mmci_handlers(PXA2xxMMCIState *s, qemu_irq readonly,
qemu_irq coverswitch)
{
DeviceState *dev = DEVICE(s);
s->readonly = readonly;
s->inserted = coverswitch;
pxa2xx_mmci_set_inserted(dev, sdbus_get_inserted(&s->sdbus));
pxa2xx_mmci_set_readonly(dev, sdbus_get_readonly(&s->sdbus));
}
static void pxa2xx_mmci_reset(DeviceState *d)
{
PXA2xxMMCIState *s = PXA2XX_MMCI(d);
s->status = 0;
s->clkrt = 0;
s->spi = 0;
s->cmdat = 0;
s->resp_tout = 0;
s->read_tout = 0;
s->blklen = 0;
s->numblk = 0;
s->intmask = 0;
s->intreq = 0;
s->cmd = 0;
s->arg = 0;
s->active = 0;
s->bytesleft = 0;
s->tx_start = 0;
s->tx_len = 0;
s->rx_start = 0;
s->rx_len = 0;
s->resp_len = 0;
s->cmdreq = 0;
memset(s->tx_fifo, 0, sizeof(s->tx_fifo));
memset(s->rx_fifo, 0, sizeof(s->rx_fifo));
memset(s->resp_fifo, 0, sizeof(s->resp_fifo));
}
static void pxa2xx_mmci_instance_init(Object *obj)
{
PXA2xxMMCIState *s = PXA2XX_MMCI(obj);
SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
DeviceState *dev = DEVICE(obj);
memory_region_init_io(&s->iomem, obj, &pxa2xx_mmci_ops, s,
"pxa2xx-mmci", 0x00100000);
sysbus_init_mmio(sbd, &s->iomem);
sysbus_init_irq(sbd, &s->irq);
qdev_init_gpio_out_named(dev, &s->rx_dma, "rx-dma", 1);
qdev_init_gpio_out_named(dev, &s->tx_dma, "tx-dma", 1);
qbus_init(&s->sdbus, sizeof(s->sdbus),
TYPE_PXA2XX_MMCI_BUS, DEVICE(obj), "sd-bus");
}
static void pxa2xx_mmci_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->vmsd = &vmstate_pxa2xx_mmci;
dc->reset = pxa2xx_mmci_reset;
}
static void pxa2xx_mmci_bus_class_init(ObjectClass *klass, void *data)
{
SDBusClass *sbc = SD_BUS_CLASS(klass);
sbc->set_inserted = pxa2xx_mmci_set_inserted;
sbc->set_readonly = pxa2xx_mmci_set_readonly;
}
static const TypeInfo pxa2xx_mmci_info = {
.name = TYPE_PXA2XX_MMCI,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(PXA2xxMMCIState),
.instance_init = pxa2xx_mmci_instance_init,
.class_init = pxa2xx_mmci_class_init,
};
static const TypeInfo pxa2xx_mmci_bus_info = {
.name = TYPE_PXA2XX_MMCI_BUS,
.parent = TYPE_SD_BUS,
.instance_size = sizeof(SDBus),
.class_init = pxa2xx_mmci_bus_class_init,
};
static void pxa2xx_mmci_register_types(void)
{
type_register_static(&pxa2xx_mmci_info);
type_register_static(&pxa2xx_mmci_bus_info);
}
type_init(pxa2xx_mmci_register_types)
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