+// SPDX-License-Identifier: GPL-2.0+
/*
* Device manager
*
*
* (C) Copyright 2012
* Pavel Herrmann <morpheus.ibis@gmail.com>
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
+#include <asm/io.h>
+#include <clk.h>
#include <fdtdec.h>
#include <fdt_support.h>
#include <malloc.h>
#include <dm/device.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
+#include <dm/of_access.h>
#include <dm/pinctrl.h>
#include <dm/platdata.h>
+#include <dm/read.h>
#include <dm/uclass.h>
#include <dm/uclass-internal.h>
#include <dm/util.h>
DECLARE_GLOBAL_DATA_PTR;
-int device_bind(struct udevice *parent, const struct driver *drv,
- const char *name, void *platdata, int of_offset,
- struct udevice **devp)
+static int device_bind_common(struct udevice *parent, const struct driver *drv,
+ const char *name, void *platdata,
+ ulong driver_data, ofnode node,
+ uint of_platdata_size, struct udevice **devp)
{
struct udevice *dev;
struct uclass *uc;
INIT_LIST_HEAD(&dev->devres_head);
#endif
dev->platdata = platdata;
+ dev->driver_data = driver_data;
dev->name = name;
- dev->of_offset = of_offset;
+ dev->node = node;
dev->parent = parent;
dev->driver = drv;
dev->uclass = uc;
* resolved (and ->seq updated) when the device is probed.
*/
if (uc->uc_drv->flags & DM_UC_FLAG_SEQ_ALIAS) {
- if (uc->uc_drv->name && of_offset != -1) {
- fdtdec_get_alias_seq(gd->fdt_blob,
- uc->uc_drv->name, of_offset,
- &dev->req_seq);
+ if (uc->uc_drv->name && ofnode_valid(node)) {
+ dev_read_alias_seq(dev, &dev->req_seq);
}
}
}
- if (!dev->platdata && drv->platdata_auto_alloc_size) {
- dev->flags |= DM_FLAG_ALLOC_PDATA;
- dev->platdata = calloc(1, drv->platdata_auto_alloc_size);
- if (!dev->platdata) {
- ret = -ENOMEM;
- goto fail_alloc1;
+ if (drv->platdata_auto_alloc_size) {
+ bool alloc = !platdata;
+
+ if (CONFIG_IS_ENABLED(OF_PLATDATA)) {
+ if (of_platdata_size) {
+ dev->flags |= DM_FLAG_OF_PLATDATA;
+ if (of_platdata_size <
+ drv->platdata_auto_alloc_size)
+ alloc = true;
+ }
+ }
+ if (alloc) {
+ dev->flags |= DM_FLAG_ALLOC_PDATA;
+ dev->platdata = calloc(1,
+ drv->platdata_auto_alloc_size);
+ if (!dev->platdata) {
+ ret = -ENOMEM;
+ goto fail_alloc1;
+ }
+ if (CONFIG_IS_ENABLED(OF_PLATDATA) && platdata) {
+ memcpy(dev->platdata, platdata,
+ of_platdata_size);
+ }
}
}
}
if (parent)
- dm_dbg("Bound device %s to %s\n", dev->name, parent->name);
+ pr_debug("Bound device %s to %s\n", dev->name, parent->name);
if (devp)
*devp = dev;
return ret;
}
+int device_bind_with_driver_data(struct udevice *parent,
+ const struct driver *drv, const char *name,
+ ulong driver_data, ofnode node,
+ struct udevice **devp)
+{
+ return device_bind_common(parent, drv, name, NULL, driver_data, node,
+ 0, devp);
+}
+
+int device_bind(struct udevice *parent, const struct driver *drv,
+ const char *name, void *platdata, int of_offset,
+ struct udevice **devp)
+{
+ return device_bind_common(parent, drv, name, platdata, 0,
+ offset_to_ofnode(of_offset), 0, devp);
+}
+
+int device_bind_ofnode(struct udevice *parent, const struct driver *drv,
+ const char *name, void *platdata, ofnode node,
+ struct udevice **devp)
+{
+ return device_bind_common(parent, drv, name, platdata, 0, node, 0,
+ devp);
+}
+
int device_bind_by_name(struct udevice *parent, bool pre_reloc_only,
const struct driver_info *info, struct udevice **devp)
{
struct driver *drv;
+ uint platdata_size = 0;
drv = lists_driver_lookup_name(info->name);
if (!drv)
if (pre_reloc_only && !(drv->flags & DM_FLAG_PRE_RELOC))
return -EPERM;
- return device_bind(parent, drv, info->name, (void *)info->platdata,
- -1, devp);
+#if CONFIG_IS_ENABLED(OF_PLATDATA)
+ platdata_size = info->platdata_size;
+#endif
+ return device_bind_common(parent, drv, info->name,
+ (void *)info->platdata, 0, ofnode_null(), platdata_size,
+ devp);
}
static void *alloc_priv(int size, uint flags)
void *priv;
if (flags & DM_FLAG_ALLOC_PRIV_DMA) {
+ size = ROUND(size, ARCH_DMA_MINALIGN);
priv = memalign(ARCH_DMA_MINALIGN, size);
- if (priv)
+ if (priv) {
memset(priv, '\0', size);
+
+ /*
+ * Ensure that the zero bytes are flushed to memory.
+ * This prevents problems if the driver uses this as
+ * both an input and an output buffer:
+ *
+ * 1. Zeroes written to buffer (here) and sit in the
+ * cache
+ * 2. Driver issues a read command to DMA
+ * 3. CPU runs out of cache space and evicts some cache
+ * data in the buffer, writing zeroes to RAM from
+ * the memset() above
+ * 4. DMA completes
+ * 5. Buffer now has some DMA data and some zeroes
+ * 6. Data being read is now incorrect
+ *
+ * To prevent this, ensure that the cache is clean
+ * within this range at the start. The driver can then
+ * use normal flush-after-write, invalidate-before-read
+ * procedures.
+ *
+ * TODO(sjg@chromium.org): Drop this microblaze
+ * exception.
+ */
+#ifndef CONFIG_MICROBLAZE
+ flush_dcache_range((ulong)priv, (ulong)priv + size);
+#endif
+ }
} else {
priv = calloc(1, size);
}
goto fail;
}
- if (drv->ofdata_to_platdata && dev->of_offset >= 0) {
+ if (drv->ofdata_to_platdata && dev_has_of_node(dev)) {
ret = drv->ofdata_to_platdata(dev);
if (ret)
goto fail;
}
+ /* Process 'assigned-{clocks/clock-parents/clock-rates}' properties */
+ ret = clk_set_defaults(dev);
+ if (ret)
+ goto fail;
+
if (drv->probe) {
ret = drv->probe(dev);
if (ret) {
return 0;
fail_uclass:
- if (device_remove(dev)) {
+ if (device_remove(dev, DM_REMOVE_NORMAL)) {
dm_warn("%s: Device '%s' failed to remove on error path\n",
__func__, dev->name);
}
*devp = NULL;
list_for_each_entry(dev, &parent->child_head, sibling_node) {
- if (dev->of_offset == of_offset) {
+ if (dev_of_offset(dev) == of_offset) {
*devp = dev;
return 0;
}
{
struct udevice *dev, *found;
- if (parent->of_offset == of_offset)
+ if (dev_of_offset(parent) == of_offset)
return parent;
list_for_each_entry(dev, &parent->child_head, sibling_node) {
return dev->uclass->uc_drv->name;
}
-fdt_addr_t dev_get_addr_index(struct udevice *dev, int index)
-{
-#if CONFIG_IS_ENABLED(OF_CONTROL)
- fdt_addr_t addr;
-
- if (CONFIG_IS_ENABLED(OF_TRANSLATE)) {
- const fdt32_t *reg;
- int len = 0;
- int na, ns;
-
- na = fdt_address_cells(gd->fdt_blob, dev->parent->of_offset);
- if (na < 1) {
- debug("bad #address-cells\n");
- return FDT_ADDR_T_NONE;
- }
-
- ns = fdt_size_cells(gd->fdt_blob, dev->parent->of_offset);
- if (ns < 0) {
- debug("bad #size-cells\n");
- return FDT_ADDR_T_NONE;
- }
-
- reg = fdt_getprop(gd->fdt_blob, dev->of_offset, "reg", &len);
- if (!reg || (len <= (index * sizeof(fdt32_t) * (na + ns)))) {
- debug("Req index out of range\n");
- return FDT_ADDR_T_NONE;
- }
-
- reg += index * (na + ns);
-
- /*
- * Use the full-fledged translate function for complex
- * bus setups.
- */
- addr = fdt_translate_address((void *)gd->fdt_blob,
- dev->of_offset, reg);
- } else {
- /*
- * Use the "simple" translate function for less complex
- * bus setups.
- */
- addr = fdtdec_get_addr_size_auto_parent(gd->fdt_blob,
- dev->parent->of_offset,
- dev->of_offset, "reg",
- index, NULL);
- if (CONFIG_IS_ENABLED(SIMPLE_BUS) && addr != FDT_ADDR_T_NONE) {
- if (device_get_uclass_id(dev->parent) ==
- UCLASS_SIMPLE_BUS)
- addr = simple_bus_translate(dev->parent, addr);
- }
- }
-
- /*
- * Some platforms need a special address translation. Those
- * platforms (e.g. mvebu in SPL) can configure a translation
- * offset in the DM by calling dm_set_translation_offset() that
- * will get added to all addresses returned by dev_get_addr().
- */
- addr += dm_get_translation_offset();
-
- return addr;
-#else
- return FDT_ADDR_T_NONE;
-#endif
-}
-
-fdt_addr_t dev_get_addr(struct udevice *dev)
-{
- return dev_get_addr_index(dev, 0);
-}
-
bool device_has_children(struct udevice *dev)
{
return !list_empty(&dev->child_head);
return list_is_last(&dev->sibling_node, &parent->child_head);
}
+void device_set_name_alloced(struct udevice *dev)
+{
+ dev->flags |= DM_FLAG_NAME_ALLOCED;
+}
+
int device_set_name(struct udevice *dev, const char *name)
{
name = strdup(name);
if (!name)
return -ENOMEM;
dev->name = name;
+ device_set_name_alloced(dev);
return 0;
}
+
+bool device_is_compatible(struct udevice *dev, const char *compat)
+{
+ return ofnode_device_is_compatible(dev_ofnode(dev), compat);
+}
+
+bool of_machine_is_compatible(const char *compat)
+{
+ const void *fdt = gd->fdt_blob;
+
+ return !fdt_node_check_compatible(fdt, 0, compat);
+}
projects / u-boot / blobdiff