Add submodule dependency filesHEADmaster

Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec

1 files changed, 99 insertions, 0 deletions

diff --git a/roms/u-boot/drivers/i2c/sandbox_i2c.c b/roms/u-boot/drivers/i2c/sandbox_i2c.c
new file mode 100644
index 000000000..c99e6de93
--- /dev/null
+++ b/roms/u-boot/drivers/i2c/sandbox_i2c.c
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Simulate an I2C port
+ *
+ * Copyright (c) 2014 Google, Inc
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <i2c.h>
+#include <log.h>
+#include <asm/i2c.h>
+#include <asm/test.h>
+#include <dm/acpi.h>
+#include <dm/lists.h>
+#include <dm/device-internal.h>
+
+static int get_emul(struct udevice *dev, struct udevice **devp,
+		    struct dm_i2c_ops **opsp)
+{
+	struct dm_i2c_chip *plat;
+	int ret;
+
+	*devp = NULL;
+	*opsp = NULL;
+	plat = dev_get_parent_plat(dev);
+	if (!plat->emul) {
+		ret = i2c_emul_find(dev, &plat->emul);
+		if (ret)
+			return ret;
+	}
+	*devp = plat->emul;
+	*opsp = i2c_get_ops(plat->emul);
+
+	return 0;
+}
+
+void sandbox_i2c_set_test_mode(struct udevice *bus, bool test_mode)
+{
+	struct sandbox_i2c_priv *priv = dev_get_priv(bus);
+
+	priv->test_mode = test_mode;
+}
+
+static int sandbox_i2c_xfer(struct udevice *bus, struct i2c_msg *msg,
+			    int nmsgs)
+{
+	struct dm_i2c_bus *i2c = dev_get_uclass_priv(bus);
+	struct sandbox_i2c_priv *priv = dev_get_priv(bus);
+	struct dm_i2c_ops *ops;
+	struct udevice *emul, *dev;
+	bool is_read;
+	int ret;
+
+	/* Special test code to return success but with no emulation */
+	if (priv->test_mode && msg->addr == SANDBOX_I2C_TEST_ADDR)
+		return 0;
+
+	ret = i2c_get_chip(bus, msg->addr, 1, &dev);
+	if (ret)
+		return ret;
+
+	ret = get_emul(dev, &emul, &ops);
+	if (ret)
+		return ret;
+
+	if (priv->test_mode) {
+		/*
+		* For testing, don't allow writing above 100KHz for writes and
+		* 400KHz for reads.
+		*/
+		is_read = nmsgs > 1;
+		if (i2c->speed_hz > (is_read ? I2C_SPEED_FAST_RATE :
+				I2C_SPEED_STANDARD_RATE)) {
+			debug("%s: Max speed exceeded\n", __func__);
+			return -EINVAL;
+		}
+	}
+
+	return ops->xfer(emul, msg, nmsgs);
+}
+
+static const struct dm_i2c_ops sandbox_i2c_ops = {
+	.xfer		= sandbox_i2c_xfer,
+};
+
+static const struct udevice_id sandbox_i2c_ids[] = {
+	{ .compatible = "sandbox,i2c" },
+	{ }
+};
+
+U_BOOT_DRIVER(sandbox_i2c) = {
+	.name	= "sandbox_i2c",
+	.id	= UCLASS_I2C,
+	.of_match = sandbox_i2c_ids,
+	.ops	= &sandbox_i2c_ops,
+	.priv_auto	= sizeof(struct sandbox_i2c_priv),
+};