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authorPeter Crosthwaite <peter.crosthwaite@xilinx.com>2012-10-01 12:34:37 +1000
committerPeter Crosthwaite <peter.crosthwaite@xilinx.com>2012-10-10 11:13:32 +1000
commitb4ae3cfa57b8c1bdbbd7b7d420971e9171203ade (patch)
tree08fc675a0ce8db85b5096792f85d3bfc01daaade
parentfcb5629d3eb208d84c0fe9aa1ef64a6af7de0139 (diff)
downloadqemu-arm-b4ae3cfa57b8c1bdbbd7b7d420971e9171203ade.tar.gz
ssi: Add slave autoconnect helper
Added helper function to automatically connect SPI slaves based on the QOM child nodes of a device. A SSI master device can call this routine to automatically hook-up all child nodes to its SPI bus. Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Acked-by: Peter Maydell <peter.maydell@linaro.org>
-rw-r--r--hw/ssi.c33
-rw-r--r--hw/ssi.h4
-rw-r--r--hw/xilinx_spi.c6
-rw-r--r--hw/xilinx_spips.c4
4 files changed, 44 insertions, 3 deletions
diff --git a/hw/ssi.c b/hw/ssi.c
index c47419d57f..2b56357153 100644
--- a/hw/ssi.c
+++ b/hw/ssi.c
@@ -139,3 +139,36 @@ static void ssi_slave_register_types(void)
}
type_init(ssi_slave_register_types)
+
+typedef struct SSIAutoConnectArg {
+ qemu_irq **cs_linep;
+ SSIBus *bus;
+} SSIAutoConnectArg;
+
+static int ssi_auto_connect_slave(Object *child, void *opaque)
+{
+ SSIAutoConnectArg *arg = opaque;
+ SSISlave *dev = (SSISlave *)object_dynamic_cast(child, TYPE_SSI_SLAVE);
+ qemu_irq cs_line;
+
+ if (!dev) {
+ return 0;
+ }
+
+ cs_line = qdev_get_gpio_in(DEVICE(dev), 0);
+ qdev_set_parent_bus(DEVICE(dev), &arg->bus->qbus);
+ **arg->cs_linep = cs_line;
+ (*arg->cs_linep)++;
+ return 0;
+}
+
+void ssi_auto_connect_slaves(DeviceState *parent, qemu_irq *cs_line,
+ SSIBus *bus)
+{
+ SSIAutoConnectArg arg = {
+ .cs_linep = &cs_line,
+ .bus = bus
+ };
+
+ object_child_foreach(OBJECT(parent), ssi_auto_connect_slave, &arg);
+}
diff --git a/hw/ssi.h b/hw/ssi.h
index 2bde9f5b44..a05d60beb4 100644
--- a/hw/ssi.h
+++ b/hw/ssi.h
@@ -83,6 +83,10 @@ SSIBus *ssi_create_bus(DeviceState *parent, const char *name);
uint32_t ssi_transfer(SSIBus *bus, uint32_t val);
+/* Automatically connect all children nodes a spi controller as slaves */
+void ssi_auto_connect_slaves(DeviceState *parent, qemu_irq *cs_lines,
+ SSIBus *bus);
+
/* max111x.c */
void max111x_set_input(DeviceState *dev, int line, uint8_t value);
diff --git a/hw/xilinx_spi.c b/hw/xilinx_spi.c
index 7db47877e2..5cdf967c20 100644
--- a/hw/xilinx_spi.c
+++ b/hw/xilinx_spi.c
@@ -320,8 +320,12 @@ static int xilinx_spi_init(SysBusDevice *dev)
XilinxSPI *s = FROM_SYSBUS(typeof(*s), dev);
DB_PRINT("\n");
+
+ s->spi = ssi_create_bus(&dev->qdev, "spi");
+
sysbus_init_irq(dev, &s->irq);
s->cs_lines = g_new(qemu_irq, s->num_cs);
+ ssi_auto_connect_slaves(DEVICE(s), s->cs_lines, s->spi);
for (i = 0; i < s->num_cs; ++i) {
sysbus_init_irq(dev, &s->cs_lines[i]);
}
@@ -331,8 +335,6 @@ static int xilinx_spi_init(SysBusDevice *dev)
s->irqline = -1;
- s->spi = ssi_create_bus(&dev->qdev, "spi");
-
fifo8_create(&s->tx_fifo, FIFO_CAPACITY);
fifo8_create(&s->rx_fifo, FIFO_CAPACITY);
diff --git a/hw/xilinx_spips.c b/hw/xilinx_spips.c
index a886c5d311..f64a7828fe 100644
--- a/hw/xilinx_spips.c
+++ b/hw/xilinx_spips.c
@@ -289,6 +289,9 @@ static int xilinx_spips_init(SysBusDevice *dev)
DB_PRINT("inited device model\n");
+ s->spi = ssi_create_bus(&dev->qdev, "spi");
+
+ ssi_auto_connect_slaves(DEVICE(s), s->cs_lines, s->spi);
sysbus_init_irq(dev, &s->irq);
for (i = 0; i < NUM_CS_LINES; ++i) {
sysbus_init_irq(dev, &s->cs_lines[i]);
@@ -298,7 +301,6 @@ static int xilinx_spips_init(SysBusDevice *dev)
sysbus_init_mmio(dev, &s->iomem);
s->irqline = -1;
- s->spi = ssi_create_bus(&dev->qdev, "spi");
fifo8_create(&s->rx_fifo, RXFF_A);
fifo8_create(&s->tx_fifo, TXFF_A);