* Copyright (c) 2007 CodeSourcery.
* Written by Paul Brook
*
- * This code is licenced under the GPL.
+ * This code is licensed under the GPL.
*/
+#include "blockdev.h"
#include "sysbus.h"
#include "sd.h"
-#include "sysemu.h"
//#define DEBUG_PL181 1
typedef struct {
SysBusDevice busdev;
+ MemoryRegion iomem;
SDState *card;
uint32_t clock;
uint32_t power;
uint32_t datacnt;
uint32_t status;
uint32_t mask[2];
- int fifo_pos;
- int fifo_len;
+ int32_t fifo_pos;
+ int32_t fifo_len;
/* The linux 2.6.21 driver is buggy, and misbehaves if new data arrives
while it is reading the FIFO. We hack around this be defering
subsequent transfers until after the driver polls the status word.
http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=4446/1
*/
- int linux_hack;
+ int32_t linux_hack;
uint32_t fifo[PL181_FIFO_LEN];
qemu_irq irq[2];
+ /* GPIO outputs for 'card is readonly' and 'card inserted' */
+ qemu_irq cardstatus[2];
} pl181_state;
+static const VMStateDescription vmstate_pl181 = {
+ .name = "pl181",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(clock, pl181_state),
+ VMSTATE_UINT32(power, pl181_state),
+ VMSTATE_UINT32(cmdarg, pl181_state),
+ VMSTATE_UINT32(cmd, pl181_state),
+ VMSTATE_UINT32(datatimer, pl181_state),
+ VMSTATE_UINT32(datalength, pl181_state),
+ VMSTATE_UINT32(respcmd, pl181_state),
+ VMSTATE_UINT32_ARRAY(response, pl181_state, 4),
+ VMSTATE_UINT32(datactrl, pl181_state),
+ VMSTATE_UINT32(datacnt, pl181_state),
+ VMSTATE_UINT32(status, pl181_state),
+ VMSTATE_UINT32_ARRAY(mask, pl181_state, 2),
+ VMSTATE_INT32(fifo_pos, pl181_state),
+ VMSTATE_INT32(fifo_len, pl181_state),
+ VMSTATE_INT32(linux_hack, pl181_state),
+ VMSTATE_UINT32_ARRAY(fifo, pl181_state, PL181_FIFO_LEN),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
#define PL181_CMD_INDEX 0x3f
#define PL181_CMD_RESPONSE (1 << 6)
#define PL181_CMD_LONGRESP (1 << 7)
static void pl181_fifo_run(pl181_state *s)
{
uint32_t bits;
- uint32_t value;
+ uint32_t value = 0;
int n;
- int limit;
int is_read;
is_read = (s->datactrl & PL181_DATA_DIRECTION) != 0;
if (s->datacnt != 0 && (!is_read || sd_data_ready(s->card))
&& !s->linux_hack) {
- limit = is_read ? PL181_FIFO_LEN : 0;
- n = 0;
- value = 0;
- while (s->datacnt && s->fifo_len != limit) {
- if (is_read) {
+ if (is_read) {
+ n = 0;
+ while (s->datacnt && s->fifo_len < PL181_FIFO_LEN) {
value |= (uint32_t)sd_read_data(s->card) << (n * 8);
+ s->datacnt--;
n++;
if (n == 4) {
pl181_fifo_push(s, value);
- value = 0;
n = 0;
+ value = 0;
}
- } else {
+ }
+ if (n != 0) {
+ pl181_fifo_push(s, value);
+ }
+ } else { /* write */
+ n = 0;
+ while (s->datacnt > 0 && (s->fifo_len > 0 || n > 0)) {
if (n == 0) {
value = pl181_fifo_pop(s);
n = 4;
}
+ n--;
+ s->datacnt--;
sd_write_data(s->card, value & 0xff);
value >>= 8;
- n--;
}
- s->datacnt--;
- }
- if (n && is_read) {
- pl181_fifo_push(s, value);
}
}
s->status &= ~(PL181_STATUS_RX_FIFO | PL181_STATUS_TX_FIFO);
}
}
-static uint32_t pl181_read(void *opaque, target_phys_addr_t offset)
+static uint64_t pl181_read(void *opaque, target_phys_addr_t offset,
+ unsigned size)
{
pl181_state *s = (pl181_state *)opaque;
uint32_t tmp;
case 0x48: /* FifoCnt */
/* The documentation is somewhat vague about exactly what FifoCnt
does. On real hardware it appears to be when decrememnted
- when a word is transfered between the FIFO and the serial
+ when a word is transferred between the FIFO and the serial
data engine. DataCnt is decremented after each byte is
- transfered between the serial engine and the card.
+ transferred between the serial engine and the card.
We don't emulate this level of detail, so both can be the same. */
tmp = (s->datacnt + 3) >> 2;
if (s->linux_hack) {
}
static void pl181_write(void *opaque, target_phys_addr_t offset,
- uint32_t value)
+ uint64_t value, unsigned size)
{
pl181_state *s = (pl181_state *)opaque;
pl181_update(s);
}
-static CPUReadMemoryFunc *pl181_readfn[] = {
- pl181_read,
- pl181_read,
- pl181_read
-};
-
-static CPUWriteMemoryFunc *pl181_writefn[] = {
- pl181_write,
- pl181_write,
- pl181_write
+static const MemoryRegionOps pl181_ops = {
+ .read = pl181_read,
+ .write = pl181_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
};
-static void pl181_reset(void *opaque)
+static void pl181_reset(DeviceState *d)
{
- pl181_state *s = (pl181_state *)opaque;
+ pl181_state *s = DO_UPCAST(pl181_state, busdev.qdev, d);
s->power = 0;
s->cmdarg = 0;
s->linux_hack = 0;
s->mask[0] = 0;
s->mask[1] = 0;
+
+ /* We can assume our GPIO outputs have been wired up now */
+ sd_set_cb(s->card, s->cardstatus[0], s->cardstatus[1]);
}
-static void pl181_init(SysBusDevice *dev)
+static int pl181_init(SysBusDevice *dev)
{
- int iomemtype;
pl181_state *s = FROM_SYSBUS(pl181_state, dev);
- BlockDriverState *bd;
+ DriveInfo *dinfo;
- iomemtype = cpu_register_io_memory(pl181_readfn,
- pl181_writefn, s);
- sysbus_init_mmio(dev, 0x1000, iomemtype);
+ memory_region_init_io(&s->iomem, &pl181_ops, s, "pl181", 0x1000);
+ sysbus_init_mmio(dev, &s->iomem);
sysbus_init_irq(dev, &s->irq[0]);
sysbus_init_irq(dev, &s->irq[1]);
- bd = qdev_init_bdrv(&dev->qdev, IF_SD);
- s->card = sd_init(bd, 0);
- qemu_register_reset(pl181_reset, s);
- pl181_reset(s);
- /* ??? Save/restore. */
+ qdev_init_gpio_out(&s->busdev.qdev, s->cardstatus, 2);
+ dinfo = drive_get_next(IF_SD);
+ s->card = sd_init(dinfo ? dinfo->bdrv : NULL, 0);
+ return 0;
}
-static void pl181_register_devices(void)
+static void pl181_class_init(ObjectClass *klass, void *data)
+{
+ SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
+ DeviceClass *k = DEVICE_CLASS(klass);
+
+ sdc->init = pl181_init;
+ k->vmsd = &vmstate_pl181;
+ k->reset = pl181_reset;
+ k->no_user = 1;
+}
+
+static TypeInfo pl181_info = {
+ .name = "pl181",
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(pl181_state),
+ .class_init = pl181_class_init,
+};
+
+static void pl181_register_types(void)
{
- sysbus_register_dev("pl181", sizeof(pl181_state), pl181_init);
+ type_register_static(&pl181_info);
}
-device_init(pl181_register_devices)
+type_init(pl181_register_types)
projects / qemu.git / blobdiff