Add a driver which can access emulations of devices and make them available
in sandbox.
Signed-off-by: Simon Glass <s...@chromium.org>
---
drivers/pci/Kconfig | 10 ++++++
drivers/pci/Makefile | 1 +
drivers/pci/pci_sandbox.c | 79 +++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 90 insertions(+)
create mode 100644 drivers/pci/pci_sandbox.c
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index 8b7e2ee..167d405 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -9,4 +9,14 @@ config DM_PCI
available PCI devices, allows scanning of PCI buses and provides
device configuration support.
+config PCI_SANDBOX
+ bool "Sandbox PCI support"
+ depends on SANDBOX && DM_PCI
+ help
+ Support PCI on sandbox, as an emulated bus. This permits testing of
+ PCI feature such as bus scanning, device configuration and device
+ access. The available (emulated) devices are defined statically in
+ the device tree but the normal PCI scan technique is used to find
+ then.
+
endmenu
diff --git a/drivers/pci/Makefile b/drivers/pci/Makefile
index db82786..9e2e5f9 100644
--- a/drivers/pci/Makefile
+++ b/drivers/pci/Makefile
@@ -7,6 +7,7 @@
ifneq ($(CONFIG_DM_PCI),)
obj-$(CONFIG_PCI) += pci-uclass.o pci_compat.o
+obj-$(CONFIG_PCI_SANDBOX) += pci_sandbox.o
else
obj-$(CONFIG_PCI) += pci.o
endif
diff --git a/drivers/pci/pci_sandbox.c b/drivers/pci/pci_sandbox.c
new file mode 100644
index 0000000..6de5130
--- /dev/null
+++ b/drivers/pci/pci_sandbox.c
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2014 Google, Inc
+ * Written by Simon Glass <s...@chromium.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <fdtdec.h>
+#include <inttypes.h>
+#include <pci.h>
+#include <dm/root.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+static int sandbox_pci_write_config(struct udevice *bus, pci_dev_t devfn,
+ uint offset, ulong value,
+ enum pci_size_t size)
+{
+ struct dm_pci_emul_ops *ops;
+ struct udevice *emul;
+ int ret;
+
+ ret = sandbox_pci_get_emul(bus, devfn, &emul);
+ if (ret)
+ return ret == -ENODEV ? 0 : ret;
+ ops = pci_get_emul_ops(emul);
+ if (!ops || !ops->write_config)
+ return -ENOSYS;
+
+ return ops->write_config(emul, offset, value, size);
+}
+
+static int sandbox_pci_read_config(struct udevice *bus, pci_dev_t devfn,
+ uint offset, ulong *valuep,
+ enum pci_size_t size)
+{
+ struct dm_pci_emul_ops *ops;
+ struct udevice *emul;
+ int ret;
+
+ /* Prepare the default response */
+ *valuep = pci_get_ff(size);
+ ret = sandbox_pci_get_emul(bus, devfn, &emul);
+ if (ret)
+ return ret == -ENODEV ? 0 : ret;
+ ops = pci_get_emul_ops(emul);
+ if (!ops || !ops->read_config)
+ return -ENOSYS;
+
+ return ops->read_config(emul, offset, valuep, size);
+}
+
+static int sandbox_pci_child_post_bind(struct udevice *dev)
+{
+ /* Attach an emulator if we can */
+ return dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset, false);
+}
+
+static const struct dm_pci_ops sandbox_pci_ops = {
+ .read_config = sandbox_pci_read_config,
+ .write_config = sandbox_pci_write_config,
+};
+
+static const struct udevice_id sandbox_pci_ids[] = {
+ { .compatible = "sandbox,pci" },
+ { }
+};
+
+U_BOOT_DRIVER(pci_sandbox) = {
+ .name = "pci_sandbox",
+ .id = UCLASS_PCI,
+ .of_match = sandbox_pci_ids,
+ .ops = &sandbox_pci_ops,
+ .child_post_bind = sandbox_pci_child_post_bind,
+ .per_child_platdata_auto_alloc_size =
+ sizeof(struct pci_child_platdata),
+};
--
2.2.0.rc0.207.ga3a616c
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