+// SPDX-License-Identifier: GPL-2.0+
/*
* Simulate an I2C port
*
* Copyright (c) 2014 Google, Inc
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
-#include <fdtdec.h>
#include <i2c.h>
#include <asm/test.h>
#include <dm/lists.h>
#include <dm/device-internal.h>
-#include <dm/root.h>
-
-DECLARE_GLOBAL_DATA_PTR;
-struct dm_sandbox_i2c_emul_priv {
- struct udevice *emul;
+struct sandbox_i2c_priv {
+ bool test_mode;
};
static int get_emul(struct udevice *dev, struct udevice **devp,
struct dm_i2c_ops **opsp)
{
- struct dm_i2c_chip *priv;
+ struct dm_i2c_chip *plat;
+ struct udevice *child;
int ret;
*devp = NULL;
*opsp = NULL;
- priv = dev_get_parentdata(dev);
- if (!priv->emul) {
- ret = dm_scan_fdt_node(dev, gd->fdt_blob, dev->of_offset,
- false);
+ plat = dev_get_parent_platdata(dev);
+ if (!plat->emul) {
+ ret = dm_scan_fdt_dev(dev);
if (ret)
return ret;
- ret = device_get_child(dev, 0, &priv->emul);
- if (ret)
- return ret;
+ for (device_find_first_child(dev, &child); child;
+ device_find_next_child(&child)) {
+ if (device_get_uclass_id(child) != UCLASS_I2C_EMUL)
+ continue;
+
+ ret = device_probe(child);
+ if (ret)
+ return ret;
+
+ break;
+ }
+
+ if (child)
+ plat->emul = child;
+ else
+ return -ENODEV;
}
- *devp = priv->emul;
- *opsp = i2c_get_ops(priv->emul);
+ *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 = bus->uclass_priv;
+ 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 (msg->addr == SANDBOX_I2C_TEST_ADDR)
+ if (priv->test_mode && msg->addr == SANDBOX_I2C_TEST_ADDR)
return 0;
- ret = i2c_get_chip(bus, msg->addr, &dev);
+ ret = i2c_get_chip(bus, msg->addr, 1, &dev);
if (ret)
return ret;
if (ret)
return ret;
- /*
- * For testing, don't allow writing above 100KHz for writes and
- * 400KHz for reads
- */
- is_read = nmsgs > 1;
- if (i2c->speed_hz > (is_read ? 400000 : 100000))
- return -EINVAL;
+ 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 ? 400000 : 100000)) {
+ debug("%s: Max speed exceeded\n", __func__);
+ return -EINVAL;
+ }
+ }
+
return ops->xfer(emul, msg, nmsgs);
}
.xfer = sandbox_i2c_xfer,
};
-static int sandbox_i2c_child_pre_probe(struct udevice *dev)
-{
- struct dm_i2c_chip *i2c_chip = dev_get_parentdata(dev);
-
- /* Ignore our test address */
- if (i2c_chip->chip_addr == SANDBOX_I2C_TEST_ADDR)
- return 0;
- if (dev->of_offset == -1)
- return 0;
-
- return i2c_chip_ofdata_to_platdata(gd->fdt_blob, dev->of_offset,
- i2c_chip);
-}
-
static const struct udevice_id sandbox_i2c_ids[] = {
{ .compatible = "sandbox,i2c" },
{ }
.name = "i2c_sandbox",
.id = UCLASS_I2C,
.of_match = sandbox_i2c_ids,
- .per_child_auto_alloc_size = sizeof(struct dm_i2c_chip),
- .child_pre_probe = sandbox_i2c_child_pre_probe,
.ops = &sandbox_i2c_ops,
+ .priv_auto_alloc_size = sizeof(struct sandbox_i2c_priv),
};