[Feature] add GA346 baseline version
Change-Id: Ic62933698569507dcf98240cdf5d9931ae34348f
diff --git a/src/kernel/linux/v4.19/drivers/of/device.c b/src/kernel/linux/v4.19/drivers/of/device.c
new file mode 100644
index 0000000..2587428
--- /dev/null
+++ b/src/kernel/linux/v4.19/drivers/of/device.c
@@ -0,0 +1,349 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/string.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/of_iommu.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+
+#include <asm/errno.h>
+#include "of_private.h"
+
+/**
+ * of_match_device - Tell if a struct device matches an of_device_id list
+ * @ids: array of of device match structures to search in
+ * @dev: the of device structure to match against
+ *
+ * Used by a driver to check whether an platform_device present in the
+ * system is in its list of supported devices.
+ */
+const struct of_device_id *of_match_device(const struct of_device_id *matches,
+ const struct device *dev)
+{
+ if ((!matches) || (!dev->of_node))
+ return NULL;
+ return of_match_node(matches, dev->of_node);
+}
+EXPORT_SYMBOL(of_match_device);
+
+struct platform_device *of_dev_get(struct platform_device *dev)
+{
+ struct device *tmp;
+
+ if (!dev)
+ return NULL;
+ tmp = get_device(&dev->dev);
+ if (tmp)
+ return to_platform_device(tmp);
+ else
+ return NULL;
+}
+EXPORT_SYMBOL(of_dev_get);
+
+void of_dev_put(struct platform_device *dev)
+{
+ if (dev)
+ put_device(&dev->dev);
+}
+EXPORT_SYMBOL(of_dev_put);
+
+int of_device_add(struct platform_device *ofdev)
+{
+ BUG_ON(ofdev->dev.of_node == NULL);
+
+ /* name and id have to be set so that the platform bus doesn't get
+ * confused on matching */
+ ofdev->name = dev_name(&ofdev->dev);
+ ofdev->id = PLATFORM_DEVID_NONE;
+
+ /*
+ * If this device has not binding numa node in devicetree, that is
+ * of_node_to_nid returns NUMA_NO_NODE. device_add will assume that this
+ * device is on the same node as the parent.
+ */
+ set_dev_node(&ofdev->dev, of_node_to_nid(ofdev->dev.of_node));
+
+ return device_add(&ofdev->dev);
+}
+
+/**
+ * of_dma_configure - Setup DMA configuration
+ * @dev: Device to apply DMA configuration
+ * @np: Pointer to OF node having DMA configuration
+ * @force_dma: Whether device is to be set up by of_dma_configure() even if
+ * DMA capability is not explicitly described by firmware.
+ *
+ * Try to get devices's DMA configuration from DT and update it
+ * accordingly.
+ *
+ * If platform code needs to use its own special DMA configuration, it
+ * can use a platform bus notifier and handle BUS_NOTIFY_ADD_DEVICE events
+ * to fix up DMA configuration.
+ */
+int of_dma_configure(struct device *dev, struct device_node *np, bool force_dma)
+{
+ u64 dma_addr, paddr, size = 0;
+ int ret;
+ bool coherent;
+ unsigned long offset;
+ const struct iommu_ops *iommu;
+ u64 mask;
+
+ ret = of_dma_get_range(np, &dma_addr, &paddr, &size);
+ if (ret < 0) {
+ /*
+ * For legacy reasons, we have to assume some devices need
+ * DMA configuration regardless of whether "dma-ranges" is
+ * correctly specified or not.
+ */
+ if (!force_dma)
+ return ret == -ENODEV ? 0 : ret;
+
+ dma_addr = offset = 0;
+ } else {
+ offset = PFN_DOWN(paddr - dma_addr);
+
+ /*
+ * Add a work around to treat the size as mask + 1 in case
+ * it is defined in DT as a mask.
+ */
+ if (size & 1) {
+ dev_warn(dev, "Invalid size 0x%llx for dma-range\n",
+ size);
+ size = size + 1;
+ }
+
+ if (!size) {
+ dev_err(dev, "Adjusted size 0x%llx invalid\n", size);
+ return -EINVAL;
+ }
+ dev_dbg(dev, "dma_pfn_offset(%#08lx)\n", offset);
+ }
+
+ /*
+ * If @dev is expected to be DMA-capable then the bus code that created
+ * it should have initialised its dma_mask pointer by this point. For
+ * now, we'll continue the legacy behaviour of coercing it to the
+ * coherent mask if not, but we'll no longer do so quietly.
+ */
+ if (!dev->dma_mask) {
+ dev_warn(dev, "DMA mask not set\n");
+ dev->dma_mask = &dev->coherent_dma_mask;
+ }
+
+ if (!size && dev->coherent_dma_mask)
+ size = max(dev->coherent_dma_mask, dev->coherent_dma_mask + 1);
+ else if (!size)
+ size = 1ULL << 32;
+
+ dev->dma_pfn_offset = offset;
+
+ /*
+ * Limit coherent and dma mask based on size and default mask
+ * set by the driver.
+ */
+ mask = DMA_BIT_MASK(ilog2(dma_addr + size - 1) + 1);
+ dev->coherent_dma_mask &= mask;
+ *dev->dma_mask &= mask;
+ /* ...but only set bus mask if we found valid dma-ranges earlier */
+ if (!ret)
+ dev->bus_dma_mask = mask;
+
+ coherent = of_dma_is_coherent(np);
+ dev_dbg(dev, "device is%sdma coherent\n",
+ coherent ? " " : " not ");
+
+ iommu = of_iommu_configure(dev, np);
+ if (IS_ERR(iommu) && PTR_ERR(iommu) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+
+ dev_dbg(dev, "device is%sbehind an iommu\n",
+ iommu ? " " : " not ");
+
+ arch_setup_dma_ops(dev, dma_addr, size, iommu, coherent);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(of_dma_configure);
+
+/**
+ * of_dma_deconfigure - Clean up DMA configuration
+ * @dev: Device for which to clean up DMA configuration
+ *
+ * Clean up all configuration performed by of_dma_configure_ops() and free all
+ * resources that have been allocated.
+ */
+void of_dma_deconfigure(struct device *dev)
+{
+ arch_teardown_dma_ops(dev);
+}
+
+int of_device_register(struct platform_device *pdev)
+{
+ device_initialize(&pdev->dev);
+ return of_device_add(pdev);
+}
+EXPORT_SYMBOL(of_device_register);
+
+void of_device_unregister(struct platform_device *ofdev)
+{
+ device_unregister(&ofdev->dev);
+}
+EXPORT_SYMBOL(of_device_unregister);
+
+const void *of_device_get_match_data(const struct device *dev)
+{
+ const struct of_device_id *match;
+
+ match = of_match_device(dev->driver->of_match_table, dev);
+ if (!match)
+ return NULL;
+
+ return match->data;
+}
+EXPORT_SYMBOL(of_device_get_match_data);
+
+static ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len)
+{
+ const char *compat;
+ char *c;
+ struct property *p;
+ ssize_t csize;
+ ssize_t tsize;
+
+ if ((!dev) || (!dev->of_node))
+ return -ENODEV;
+
+ /* Name & Type */
+ /* %p eats all alphanum characters, so %c must be used here */
+ csize = snprintf(str, len, "of:N%pOFn%c%s", dev->of_node, 'T',
+ dev->of_node->type);
+ tsize = csize;
+ len -= csize;
+ if (str)
+ str += csize;
+
+ of_property_for_each_string(dev->of_node, "compatible", p, compat) {
+ csize = strlen(compat) + 1;
+ tsize += csize;
+ if (csize > len)
+ continue;
+
+ csize = snprintf(str, len, "C%s", compat);
+ for (c = str; c; ) {
+ c = strchr(c, ' ');
+ if (c)
+ *c++ = '_';
+ }
+ len -= csize;
+ str += csize;
+ }
+
+ return tsize;
+}
+
+int of_device_request_module(struct device *dev)
+{
+ char *str;
+ ssize_t size;
+ int ret;
+
+ size = of_device_get_modalias(dev, NULL, 0);
+ if (size < 0)
+ return size;
+
+ str = kmalloc(size + 1, GFP_KERNEL);
+ if (!str)
+ return -ENOMEM;
+
+ of_device_get_modalias(dev, str, size);
+ str[size] = '\0';
+ ret = request_module(str);
+ kfree(str);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(of_device_request_module);
+
+/**
+ * of_device_modalias - Fill buffer with newline terminated modalias string
+ */
+ssize_t of_device_modalias(struct device *dev, char *str, ssize_t len)
+{
+ ssize_t sl = of_device_get_modalias(dev, str, len - 2);
+ if (sl < 0)
+ return sl;
+ if (sl > len - 2)
+ return -ENOMEM;
+
+ str[sl++] = '\n';
+ str[sl] = 0;
+ return sl;
+}
+EXPORT_SYMBOL_GPL(of_device_modalias);
+
+/**
+ * of_device_uevent - Display OF related uevent information
+ */
+void of_device_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+ const char *compat;
+ struct alias_prop *app;
+ struct property *p;
+ int seen = 0;
+
+ if ((!dev) || (!dev->of_node))
+ return;
+
+ add_uevent_var(env, "OF_NAME=%pOFn", dev->of_node);
+ add_uevent_var(env, "OF_FULLNAME=%pOF", dev->of_node);
+ if (dev->of_node->type && strcmp("<NULL>", dev->of_node->type) != 0)
+ add_uevent_var(env, "OF_TYPE=%s", dev->of_node->type);
+
+ /* Since the compatible field can contain pretty much anything
+ * it's not really legal to split it out with commas. We split it
+ * up using a number of environment variables instead. */
+ of_property_for_each_string(dev->of_node, "compatible", p, compat) {
+ add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat);
+ seen++;
+ }
+ add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen);
+
+ seen = 0;
+ mutex_lock(&of_mutex);
+ list_for_each_entry(app, &aliases_lookup, link) {
+ if (dev->of_node == app->np) {
+ add_uevent_var(env, "OF_ALIAS_%d=%s", seen,
+ app->alias);
+ seen++;
+ }
+ }
+ mutex_unlock(&of_mutex);
+}
+
+int of_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env)
+{
+ int sl;
+
+ if ((!dev) || (!dev->of_node))
+ return -ENODEV;
+
+ /* Devicetree modalias is tricky, we add it in 2 steps */
+ if (add_uevent_var(env, "MODALIAS="))
+ return -ENOMEM;
+
+ sl = of_device_get_modalias(dev, &env->buf[env->buflen-1],
+ sizeof(env->buf) - env->buflen);
+ if (sl >= (sizeof(env->buf) - env->buflen))
+ return -ENOMEM;
+ env->buflen += sl;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(of_device_uevent_modalias);