mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-15 06:33:45 +09:00
![Simon Glass](/assets/img/avatar_default.png)
This function is not used as the use case for it did not eventuate. Remove it to avoid confusion. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
694 lines
14 KiB
C
694 lines
14 KiB
C
/*
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* Device manager
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*
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* Copyright (c) 2013 Google, Inc
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*
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* (C) Copyright 2012
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* Pavel Herrmann <morpheus.ibis@gmail.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <fdtdec.h>
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#include <fdt_support.h>
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#include <malloc.h>
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#include <dm/device.h>
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#include <dm/device-internal.h>
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#include <dm/lists.h>
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#include <dm/pinctrl.h>
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#include <dm/platdata.h>
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#include <dm/uclass.h>
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#include <dm/uclass-internal.h>
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#include <dm/util.h>
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#include <linux/err.h>
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#include <linux/list.h>
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DECLARE_GLOBAL_DATA_PTR;
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int device_bind(struct udevice *parent, const struct driver *drv,
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const char *name, void *platdata, int of_offset,
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struct udevice **devp)
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{
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struct udevice *dev;
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struct uclass *uc;
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int size, ret = 0;
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if (devp)
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*devp = NULL;
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if (!name)
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return -EINVAL;
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ret = uclass_get(drv->id, &uc);
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if (ret) {
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debug("Missing uclass for driver %s\n", drv->name);
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return ret;
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}
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dev = calloc(1, sizeof(struct udevice));
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if (!dev)
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return -ENOMEM;
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INIT_LIST_HEAD(&dev->sibling_node);
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INIT_LIST_HEAD(&dev->child_head);
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INIT_LIST_HEAD(&dev->uclass_node);
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#ifdef CONFIG_DEVRES
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INIT_LIST_HEAD(&dev->devres_head);
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#endif
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dev->platdata = platdata;
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dev->name = name;
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dev->of_offset = of_offset;
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dev->parent = parent;
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dev->driver = drv;
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dev->uclass = uc;
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dev->seq = -1;
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dev->req_seq = -1;
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if (CONFIG_IS_ENABLED(OF_CONTROL) && CONFIG_IS_ENABLED(DM_SEQ_ALIAS)) {
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/*
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* Some devices, such as a SPI bus, I2C bus and serial ports
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* are numbered using aliases.
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*
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* This is just a 'requested' sequence, and will be
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* resolved (and ->seq updated) when the device is probed.
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*/
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if (uc->uc_drv->flags & DM_UC_FLAG_SEQ_ALIAS) {
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if (uc->uc_drv->name && of_offset != -1) {
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fdtdec_get_alias_seq(gd->fdt_blob,
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uc->uc_drv->name, of_offset,
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&dev->req_seq);
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}
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}
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}
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if (!dev->platdata && drv->platdata_auto_alloc_size) {
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dev->flags |= DM_FLAG_ALLOC_PDATA;
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dev->platdata = calloc(1, drv->platdata_auto_alloc_size);
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if (!dev->platdata) {
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ret = -ENOMEM;
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goto fail_alloc1;
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}
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}
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size = uc->uc_drv->per_device_platdata_auto_alloc_size;
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if (size) {
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dev->flags |= DM_FLAG_ALLOC_UCLASS_PDATA;
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dev->uclass_platdata = calloc(1, size);
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if (!dev->uclass_platdata) {
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ret = -ENOMEM;
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goto fail_alloc2;
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}
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}
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if (parent) {
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size = parent->driver->per_child_platdata_auto_alloc_size;
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if (!size) {
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size = parent->uclass->uc_drv->
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per_child_platdata_auto_alloc_size;
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}
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if (size) {
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dev->flags |= DM_FLAG_ALLOC_PARENT_PDATA;
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dev->parent_platdata = calloc(1, size);
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if (!dev->parent_platdata) {
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ret = -ENOMEM;
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goto fail_alloc3;
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}
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}
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}
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/* put dev into parent's successor list */
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if (parent)
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list_add_tail(&dev->sibling_node, &parent->child_head);
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ret = uclass_bind_device(dev);
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if (ret)
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goto fail_uclass_bind;
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/* if we fail to bind we remove device from successors and free it */
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if (drv->bind) {
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ret = drv->bind(dev);
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if (ret)
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goto fail_bind;
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}
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if (parent && parent->driver->child_post_bind) {
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ret = parent->driver->child_post_bind(dev);
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if (ret)
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goto fail_child_post_bind;
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}
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if (uc->uc_drv->post_bind) {
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ret = uc->uc_drv->post_bind(dev);
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if (ret)
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goto fail_uclass_post_bind;
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}
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if (parent)
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dm_dbg("Bound device %s to %s\n", dev->name, parent->name);
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if (devp)
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*devp = dev;
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dev->flags |= DM_FLAG_BOUND;
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return 0;
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fail_uclass_post_bind:
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/* There is no child unbind() method, so no clean-up required */
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fail_child_post_bind:
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if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) {
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if (drv->unbind && drv->unbind(dev)) {
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dm_warn("unbind() method failed on dev '%s' on error path\n",
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dev->name);
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}
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}
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fail_bind:
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if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) {
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if (uclass_unbind_device(dev)) {
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dm_warn("Failed to unbind dev '%s' on error path\n",
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dev->name);
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}
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}
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fail_uclass_bind:
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if (CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)) {
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list_del(&dev->sibling_node);
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if (dev->flags & DM_FLAG_ALLOC_PARENT_PDATA) {
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free(dev->parent_platdata);
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dev->parent_platdata = NULL;
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}
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}
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fail_alloc3:
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if (dev->flags & DM_FLAG_ALLOC_UCLASS_PDATA) {
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free(dev->uclass_platdata);
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dev->uclass_platdata = NULL;
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}
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fail_alloc2:
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if (dev->flags & DM_FLAG_ALLOC_PDATA) {
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free(dev->platdata);
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dev->platdata = NULL;
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}
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fail_alloc1:
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devres_release_all(dev);
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free(dev);
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return ret;
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}
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int device_bind_by_name(struct udevice *parent, bool pre_reloc_only,
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const struct driver_info *info, struct udevice **devp)
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{
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struct driver *drv;
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drv = lists_driver_lookup_name(info->name);
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if (!drv)
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return -ENOENT;
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if (pre_reloc_only && !(drv->flags & DM_FLAG_PRE_RELOC))
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return -EPERM;
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return device_bind(parent, drv, info->name, (void *)info->platdata,
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-1, devp);
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}
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static void *alloc_priv(int size, uint flags)
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{
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void *priv;
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if (flags & DM_FLAG_ALLOC_PRIV_DMA) {
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priv = memalign(ARCH_DMA_MINALIGN, size);
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if (priv)
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memset(priv, '\0', size);
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} else {
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priv = calloc(1, size);
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}
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return priv;
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}
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int device_probe(struct udevice *dev)
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{
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const struct driver *drv;
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int size = 0;
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int ret;
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int seq;
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if (!dev)
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return -EINVAL;
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if (dev->flags & DM_FLAG_ACTIVATED)
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return 0;
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drv = dev->driver;
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assert(drv);
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/* Allocate private data if requested and not reentered */
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if (drv->priv_auto_alloc_size && !dev->priv) {
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dev->priv = alloc_priv(drv->priv_auto_alloc_size, drv->flags);
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if (!dev->priv) {
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ret = -ENOMEM;
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goto fail;
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}
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}
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/* Allocate private data if requested and not reentered */
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size = dev->uclass->uc_drv->per_device_auto_alloc_size;
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if (size && !dev->uclass_priv) {
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dev->uclass_priv = calloc(1, size);
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if (!dev->uclass_priv) {
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ret = -ENOMEM;
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goto fail;
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}
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}
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/* Ensure all parents are probed */
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if (dev->parent) {
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size = dev->parent->driver->per_child_auto_alloc_size;
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if (!size) {
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size = dev->parent->uclass->uc_drv->
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per_child_auto_alloc_size;
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}
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if (size && !dev->parent_priv) {
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dev->parent_priv = alloc_priv(size, drv->flags);
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if (!dev->parent_priv) {
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ret = -ENOMEM;
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goto fail;
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}
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}
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ret = device_probe(dev->parent);
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if (ret)
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goto fail;
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/*
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* The device might have already been probed during
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* the call to device_probe() on its parent device
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* (e.g. PCI bridge devices). Test the flags again
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* so that we don't mess up the device.
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*/
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if (dev->flags & DM_FLAG_ACTIVATED)
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return 0;
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}
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seq = uclass_resolve_seq(dev);
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if (seq < 0) {
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ret = seq;
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goto fail;
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}
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dev->seq = seq;
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dev->flags |= DM_FLAG_ACTIVATED;
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/*
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* Process pinctrl for everything except the root device, and
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* continue regardless of the result of pinctrl. Don't process pinctrl
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* settings for pinctrl devices since the device may not yet be
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* probed.
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*/
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if (dev->parent && device_get_uclass_id(dev) != UCLASS_PINCTRL)
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pinctrl_select_state(dev, "default");
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ret = uclass_pre_probe_device(dev);
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if (ret)
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goto fail;
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if (dev->parent && dev->parent->driver->child_pre_probe) {
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ret = dev->parent->driver->child_pre_probe(dev);
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if (ret)
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goto fail;
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}
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if (drv->ofdata_to_platdata && dev->of_offset >= 0) {
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ret = drv->ofdata_to_platdata(dev);
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if (ret)
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goto fail;
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}
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if (drv->probe) {
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ret = drv->probe(dev);
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if (ret) {
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dev->flags &= ~DM_FLAG_ACTIVATED;
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goto fail;
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}
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}
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ret = uclass_post_probe_device(dev);
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if (ret)
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goto fail_uclass;
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return 0;
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fail_uclass:
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if (device_remove(dev)) {
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dm_warn("%s: Device '%s' failed to remove on error path\n",
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__func__, dev->name);
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}
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fail:
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dev->flags &= ~DM_FLAG_ACTIVATED;
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dev->seq = -1;
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device_free(dev);
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return ret;
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}
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void *dev_get_platdata(struct udevice *dev)
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{
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if (!dev) {
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dm_warn("%s: null device\n", __func__);
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return NULL;
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}
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return dev->platdata;
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}
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void *dev_get_parent_platdata(struct udevice *dev)
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{
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if (!dev) {
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dm_warn("%s: null device\n", __func__);
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return NULL;
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}
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return dev->parent_platdata;
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}
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void *dev_get_uclass_platdata(struct udevice *dev)
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{
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if (!dev) {
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dm_warn("%s: null device\n", __func__);
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return NULL;
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}
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return dev->uclass_platdata;
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}
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void *dev_get_priv(struct udevice *dev)
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{
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if (!dev) {
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dm_warn("%s: null device\n", __func__);
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return NULL;
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}
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return dev->priv;
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}
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void *dev_get_uclass_priv(struct udevice *dev)
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{
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if (!dev) {
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dm_warn("%s: null device\n", __func__);
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return NULL;
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}
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return dev->uclass_priv;
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}
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void *dev_get_parent_priv(struct udevice *dev)
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{
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if (!dev) {
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dm_warn("%s: null device\n", __func__);
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return NULL;
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}
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return dev->parent_priv;
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}
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static int device_get_device_tail(struct udevice *dev, int ret,
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struct udevice **devp)
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{
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if (ret)
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return ret;
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ret = device_probe(dev);
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if (ret)
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return ret;
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*devp = dev;
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return 0;
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}
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int device_get_child(struct udevice *parent, int index, struct udevice **devp)
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{
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struct udevice *dev;
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list_for_each_entry(dev, &parent->child_head, sibling_node) {
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if (!index--)
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return device_get_device_tail(dev, 0, devp);
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}
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return -ENODEV;
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}
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int device_find_child_by_seq(struct udevice *parent, int seq_or_req_seq,
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bool find_req_seq, struct udevice **devp)
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{
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struct udevice *dev;
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*devp = NULL;
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if (seq_or_req_seq == -1)
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return -ENODEV;
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list_for_each_entry(dev, &parent->child_head, sibling_node) {
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if ((find_req_seq ? dev->req_seq : dev->seq) ==
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seq_or_req_seq) {
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*devp = dev;
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return 0;
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}
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}
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return -ENODEV;
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}
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int device_get_child_by_seq(struct udevice *parent, int seq,
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struct udevice **devp)
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{
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struct udevice *dev;
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int ret;
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*devp = NULL;
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ret = device_find_child_by_seq(parent, seq, false, &dev);
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if (ret == -ENODEV) {
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/*
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* We didn't find it in probed devices. See if there is one
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* that will request this seq if probed.
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*/
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ret = device_find_child_by_seq(parent, seq, true, &dev);
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}
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return device_get_device_tail(dev, ret, devp);
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}
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int device_find_child_by_of_offset(struct udevice *parent, int of_offset,
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struct udevice **devp)
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{
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struct udevice *dev;
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*devp = NULL;
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list_for_each_entry(dev, &parent->child_head, sibling_node) {
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if (dev->of_offset == of_offset) {
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*devp = dev;
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return 0;
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}
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}
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return -ENODEV;
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}
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int device_get_child_by_of_offset(struct udevice *parent, int node,
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struct udevice **devp)
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{
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struct udevice *dev;
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int ret;
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*devp = NULL;
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ret = device_find_child_by_of_offset(parent, node, &dev);
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return device_get_device_tail(dev, ret, devp);
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}
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static struct udevice *_device_find_global_by_of_offset(struct udevice *parent,
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int of_offset)
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{
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struct udevice *dev, *found;
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if (parent->of_offset == of_offset)
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return parent;
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list_for_each_entry(dev, &parent->child_head, sibling_node) {
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found = _device_find_global_by_of_offset(dev, of_offset);
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if (found)
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return found;
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}
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return NULL;
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}
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int device_get_global_by_of_offset(int of_offset, struct udevice **devp)
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{
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struct udevice *dev;
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dev = _device_find_global_by_of_offset(gd->dm_root, of_offset);
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return device_get_device_tail(dev, dev ? 0 : -ENOENT, devp);
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}
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int device_find_first_child(struct udevice *parent, struct udevice **devp)
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{
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if (list_empty(&parent->child_head)) {
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*devp = NULL;
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} else {
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*devp = list_first_entry(&parent->child_head, struct udevice,
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sibling_node);
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}
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return 0;
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}
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int device_find_next_child(struct udevice **devp)
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{
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struct udevice *dev = *devp;
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struct udevice *parent = dev->parent;
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if (list_is_last(&dev->sibling_node, &parent->child_head)) {
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*devp = NULL;
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} else {
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*devp = list_entry(dev->sibling_node.next, struct udevice,
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sibling_node);
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}
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return 0;
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|
}
|
|
|
|
struct udevice *dev_get_parent(struct udevice *child)
|
|
{
|
|
return child->parent;
|
|
}
|
|
|
|
ulong dev_get_driver_data(struct udevice *dev)
|
|
{
|
|
return dev->driver_data;
|
|
}
|
|
|
|
const void *dev_get_driver_ops(struct udevice *dev)
|
|
{
|
|
if (!dev || !dev->driver->ops)
|
|
return NULL;
|
|
|
|
return dev->driver->ops;
|
|
}
|
|
|
|
enum uclass_id device_get_uclass_id(struct udevice *dev)
|
|
{
|
|
return dev->uclass->uc_drv->id;
|
|
}
|
|
|
|
const char *dev_get_uclass_name(struct udevice *dev)
|
|
{
|
|
if (!dev)
|
|
return NULL;
|
|
|
|
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);
|
|
}
|
|
|
|
bool device_has_active_children(struct udevice *dev)
|
|
{
|
|
struct udevice *child;
|
|
|
|
for (device_find_first_child(dev, &child);
|
|
child;
|
|
device_find_next_child(&child)) {
|
|
if (device_active(child))
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool device_is_last_sibling(struct udevice *dev)
|
|
{
|
|
struct udevice *parent = dev->parent;
|
|
|
|
if (!parent)
|
|
return false;
|
|
return list_is_last(&dev->sibling_node, &parent->child_head);
|
|
}
|
|
|
|
int device_set_name(struct udevice *dev, const char *name)
|
|
{
|
|
name = strdup(name);
|
|
if (!name)
|
|
return -ENOMEM;
|
|
dev->name = name;
|
|
|
|
return 0;
|
|
}
|