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stellaris: Removed SSI mux 

Removed the explicit SSI mux and wired the CS line directly up to the SSI
devices.

Signed-off-by: Peter A. G. Crosthwaite <peter.crosthwaite@petalogix.com>
This commit is contained in:
Peter A. G. Crosthwaite 2012-07-31 16:42:04 +10:00 committed by Peter Crosthwaite
parent 1e5b31e6bd
commit 8120e7144b
3 changed files with 17 additions and 77 deletions
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1
hw/ssd0323.c
View File

@ -354,6 +354,7 @@ static void ssd0323_class_init(ObjectClass *klass, void *data)
k->init = ssd0323_init;
k->transfer = ssd0323_transfer;
k->cs_polarity = SSI_CS_HIGH;
}
static TypeInfo ssd0323_info = {

1
hw/ssi-sd.c
View File

@ -256,6 +256,7 @@ static void ssi_sd_class_init(ObjectClass *klass, void *data)
k->init = ssi_sd_init;
k->transfer = ssi_sd_transfer;
k->cs_polarity = SSI_CS_LOW;
}
static TypeInfo ssi_sd_info = {

92
hw/stellaris.c
View File

@ -1154,58 +1154,6 @@ static int stellaris_adc_init(SysBusDevice *dev)
return 0;
}
/* Some boards have both an OLED controller and SD card connected to
the same SSI port, with the SD card chip select connected to a
GPIO pin. Technically the OLED chip select is connected to the SSI
Fss pin. We do not bother emulating that as both devices should
never be selected simultaneously, and our OLED controller ignores stray
0xff commands that occur when deselecting the SD card. */
typedef struct {
SSISlave ssidev;
qemu_irq irq;
int current_dev;
SSIBus *bus[2];
} stellaris_ssi_bus_state;
static void stellaris_ssi_bus_select(void *opaque, int irq, int level)
{
stellaris_ssi_bus_state *s = (stellaris_ssi_bus_state *)opaque;
s->current_dev = level;
}
static uint32_t stellaris_ssi_bus_transfer(SSISlave *dev, uint32_t val)
{
stellaris_ssi_bus_state *s = FROM_SSI_SLAVE(stellaris_ssi_bus_state, dev);
return ssi_transfer(s->bus[s->current_dev], val);
}
static const VMStateDescription vmstate_stellaris_ssi_bus = {
.name = "stellaris_ssi_bus",
.version_id = 2,
.minimum_version_id = 2,
.minimum_version_id_old = 2,
.fields = (VMStateField[]) {
VMSTATE_SSI_SLAVE(ssidev, stellaris_ssi_bus_state),
VMSTATE_INT32(current_dev, stellaris_ssi_bus_state),
VMSTATE_END_OF_LIST()
}
};
static int stellaris_ssi_bus_init(SSISlave *dev)
{
stellaris_ssi_bus_state *s = FROM_SSI_SLAVE(stellaris_ssi_bus_state, dev);
s->bus[0] = ssi_create_bus(&dev->qdev, "ssi0");
s->bus[1] = ssi_create_bus(&dev->qdev, "ssi1");
qdev_init_gpio_in(&dev->qdev, stellaris_ssi_bus_select, 1);
vmstate_register(&dev->qdev, -1, &vmstate_stellaris_ssi_bus, s);
return 0;
}
/* Board init. */
static stellaris_board_info stellaris_boards[] = {
{ "LM3S811EVB",
@ -1306,19 +1254,25 @@ static void stellaris_init(const char *kernel_filename, const char *cpu_model,
if (board->dc2 & (1 << 4)) {
dev = sysbus_create_simple("pl022", 0x40008000, pic[7]);
if (board->peripherals & BP_OLED_SSI) {
DeviceState *mux;
void *bus;
DeviceState *sddev;
DeviceState *ssddev;
/* Some boards have both an OLED controller and SD card connected to
* the same SSI port, with the SD card chip select connected to a
* GPIO pin. Technically the OLED chip select is connected to the
* SSI Fss pin. We do not bother emulating that as both devices
* should never be selected simultaneously, and our OLED controller
* ignores stray 0xff commands that occur when deselecting the SD
* card.
*/
bus = qdev_get_child_bus(dev, "ssi");
mux = ssi_create_slave(bus, "evb6965-ssi");
gpio_out[GPIO_D][0] = qdev_get_gpio_in(mux, 0);
bus = qdev_get_child_bus(mux, "ssi0");
ssi_create_slave(bus, "ssi-sd");
bus = qdev_get_child_bus(mux, "ssi1");
dev = ssi_create_slave(bus, "ssd0323");
gpio_out[GPIO_C][7] = qdev_get_gpio_in(dev, 0);
sddev = ssi_create_slave(bus, "ssi-sd");
ssddev = ssi_create_slave(bus, "ssd0323");
gpio_out[GPIO_D][0] = qemu_irq_split(qdev_get_gpio_in(sddev, 0),
qdev_get_gpio_in(ssddev, 0));
gpio_out[GPIO_C][7] = qdev_get_gpio_in(ssddev, 1);
/* Make sure the select pin is high. */
qemu_irq_raise(gpio_out[GPIO_D][0]);
@ -1395,21 +1349,6 @@ static void stellaris_machine_init(void)
machine_init(stellaris_machine_init);
static void stellaris_ssi_bus_class_init(ObjectClass *klass, void *data)
{
SSISlaveClass *k = SSI_SLAVE_CLASS(klass);
k->init = stellaris_ssi_bus_init;
k->transfer = stellaris_ssi_bus_transfer;
}
static TypeInfo stellaris_ssi_bus_info = {
.name = "evb6965-ssi",
.parent = TYPE_SSI_SLAVE,
.instance_size = sizeof(stellaris_ssi_bus_state),
.class_init = stellaris_ssi_bus_class_init,
};
static void stellaris_i2c_class_init(ObjectClass *klass, void *data)
{
SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
@ -1457,7 +1396,6 @@ static void stellaris_register_types(void)
type_register_static(&stellaris_i2c_info);
type_register_static(&stellaris_gptm_info);
type_register_static(&stellaris_adc_info);
type_register_static(&stellaris_ssi_bus_info);
}
type_init(stellaris_register_types)