firmware: allow firmware files to be built into kernel image

[pandora-kernel.git] / drivers / base / firmware_class.c

diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 264b3a2..b0be1d1 100644 (file)
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -49,6 +49,14 @@ struct firmware_priv {
        struct timer_list timeout;
 };
 
+#ifdef CONFIG_FW_LOADER
+extern struct builtin_fw __start_builtin_fw[];
+extern struct builtin_fw __end_builtin_fw[];
+#else /* Module case. Avoid ifdefs later; it'll all optimise out */
+static struct builtin_fw *__start_builtin_fw;
+static struct builtin_fw *__end_builtin_fw;
+#endif
+
 static void
 fw_load_abort(struct firmware_priv *fw_priv)
 {
@@ -391,13 +399,12 @@ _request_firmware(const struct firmware **firmware_p, const char *name,
        struct device *f_dev;
        struct firmware_priv *fw_priv;
        struct firmware *firmware;
+       struct builtin_fw *builtin;
        int retval;
 
        if (!firmware_p)
                return -EINVAL;
 
-       printk(KERN_INFO "firmware: requesting %s\n", name);
-
        *firmware_p = firmware = kzalloc(sizeof(*firmware), GFP_KERNEL);
        if (!firmware) {
                printk(KERN_ERR "%s: kmalloc(struct firmware) failed\n",
@@ -406,6 +413,20 @@ _request_firmware(const struct firmware **firmware_p, const char *name,
                goto out;
        }
 
+       for (builtin = __start_builtin_fw; builtin != __end_builtin_fw;
+            builtin++) {
+               if (strcmp(name, builtin->name))
+                       continue;
+               printk(KERN_INFO "firmware: using built-in firmware %s\n",
+                      name);
+               firmware->size = builtin->size;
+               firmware->data = builtin->data;
+               return 0;
+       }
+
+       if (uevent)
+               printk(KERN_INFO "firmware: requesting %s\n", name);
+
        retval = fw_setup_device(firmware, &f_dev, name, device, uevent);
        if (retval)
                goto error_kfree_fw;
@@ -473,8 +494,16 @@ request_firmware(const struct firmware **firmware_p, const char *name,
 void
 release_firmware(const struct firmware *fw)
 {
+       struct builtin_fw *builtin;
+
        if (fw) {
+               for (builtin = __start_builtin_fw; builtin != __end_builtin_fw;
+                    builtin++) {
+                       if (fw->data == builtin->data)
+                               goto free_fw;
+               }
                vfree(fw->data);
+       free_fw:
                kfree(fw);
        }
 }