1 files changed, 94 insertions, 0 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/nvram.c b/drivers/net/wireless/brcm80211/brcmfmac/nvram.c
new file mode 100644
index 000000000000..d5ef86db631b
--- /dev/null
+++ b/drivers/net/wireless/brcm80211/brcmfmac/nvram.c
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2013 Broadcom Corporation
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+ * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+ * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+ * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/firmware.h>
+
+#include "nvram.h"
+
+/* brcmf_nvram_strip :Takes a buffer of "<var>=<value>\n" lines read from a file
+ * and ending in a NUL. Removes carriage returns, empty lines, comment lines,
+ * and converts newlines to NULs. Shortens buffer as needed and pads with NULs.
+ * End of buffer is completed with token identifying length of buffer.
+ */
+void *brcmf_nvram_strip(const struct firmware *nv, u32 *new_length)
+{
+	u8 *nvram;
+	u32 i;
+	u32 len;
+	u32 column;
+	u8 val;
+	bool comment;
+	u32 token;
+	__le32 token_le;
+
+	/* Alloc for extra 0 byte + roundup by 4 + length field */
+	nvram = kmalloc(nv->size + 1 + 3 + sizeof(token_le), GFP_KERNEL);
+	if (!nvram)
+		return NULL;
+
+	len = 0;
+	column = 0;
+	comment = false;
+	for (i = 0; i < nv->size; i++) {
+		val = nv->data[i];
+		if (val == 0)
+			break;
+		if (val == '\r')
+			continue;
+		if (comment && (val != '\n'))
+			continue;
+		comment = false;
+		if (val == '#') {
+			comment = true;
+			continue;
+		}
+		if (val == '\n') {
+			if (column == 0)
+				continue;
+			nvram[len] = 0;
+			len++;
+			column = 0;
+			continue;
+		}
+		nvram[len] = val;
+		len++;
+		column++;
+	}
+	column = len;
+	*new_length = roundup(len + 1, 4);
+	while (column != *new_length) {
+		nvram[column] = 0;
+		column++;
+	}
+
+	token = *new_length / 4;
+	token = (~token << 16) | (token & 0x0000FFFF);
+	token_le = cpu_to_le32(token);
+
+	memcpy(&nvram[*new_length], &token_le, sizeof(token_le));
+	*new_length += sizeof(token_le);
+
+	return nvram;
+}
+
+void brcmf_nvram_free(void *nvram)
+{
+	kfree(nvram);
+}
+
+