arm64: allwinner: Add sunxi-addr driver

Used to fix uwe5622 bluetooth MAC addresses are the same.

drivers/misc/Kconfig

@@ -494,4 +494,5 @@ source "drivers/misc/cardreader/Kconfig"
 source "drivers/misc/habanalabs/Kconfig"
 source "drivers/misc/uacce/Kconfig"
 source "drivers/misc/pvpanic/Kconfig"
+source "drivers/misc/sunxi-addr/Kconfig"
 endmenu

drivers/misc/Makefile

@@ -60,3 +60,4 @@ obj-$(CONFIG_XILINX_SDFEC)	+= xilinx_sdfec.o
 obj-$(CONFIG_HISI_HIKEY_USB)	+= hisi_hikey_usb.o
 obj-$(CONFIG_HI6421V600_IRQ)	+= hi6421v600-irq.o
 obj-$(CONFIG_MODEM_POWER)	+= modem-power.o
+obj-$(CONFIG_SUNXI_ADDR_MGT)    += sunxi-addr/

drivers/misc/sunxi-addr/Kconfig

@@ -0,0 +1,6 @@
+config SUNXI_ADDR_MGT
+  tristate "Allwinner Network MAC Addess Manager"
+  depends on BT || ETHERNET || WLAN
+  depends on NVMEM_SUNXI_SID
+  help
+    allwinner network mac address management

drivers/misc/sunxi-addr/Makefile

@@ -0,0 +1,5 @@
+#
+# Makefile for wifi mac addr manager drivers
+#
+sunxi_addr-objs := sunxi-addr.o sha256.o
+obj-$(CONFIG_SUNXI_ADDR_MGT)   += sunxi_addr.o

drivers/misc/sunxi-addr/sha256.c

@@ -0,0 +1,178 @@
+/*
+ * Local implement of sha256.
+ *
+ * Copyright (C) 2013 Allwinner.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+#include <linux/kernel.h>
+#include <linux/string.h>
+
+/****************************** MACROS ******************************/
+#define ROTRIGHT(a, b) (((a) >> (b)) | ((a) << (32 - (b))))
+#define CH(x, y, z)    (((x) & (y)) ^ (~(x) & (z)))
+#define MAJ(x, y, z)   (((x) & (y)) ^  ((x) & (z)) ^ ((y) & (z)))
+#define EP0(x)         (ROTRIGHT(x,  2) ^ ROTRIGHT(x, 13) ^ ROTRIGHT(x, 22))
+#define EP1(x)         (ROTRIGHT(x,  6) ^ ROTRIGHT(x, 11) ^ ROTRIGHT(x, 25))
+#define SIG0(x)        (ROTRIGHT(x,  7) ^ ROTRIGHT(x, 18) ^ ((x) >> 3))
+#define SIG1(x)        (ROTRIGHT(x, 17) ^ ROTRIGHT(x, 19) ^ ((x) >> 10))
+
+/**************************** VARIABLES *****************************/
+static const uint32_t k[64] = {
+	0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
+	0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
+	0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
+	0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
+	0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
+	0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
+	0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
+	0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
+	0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
+	0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
+	0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
+	0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
+	0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
+	0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
+	0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
+	0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
+};
+
+struct sha256_ctx {
+	uint8_t data[64];   /* current 512-bit chunk of message data, just like a buffer */
+	uint32_t datalen;   /* sign the data length of current chunk */
+	uint64_t bitlen;    /* the bit length of the total message */
+	uint32_t state[8];  /* store the middle state of hash abstract */
+};
+
+/*********************** FUNCTION DEFINITIONS ***********************/
+static void sha256_transform(struct sha256_ctx *ctx, const uint8_t *data)
+{
+	uint32_t a, b, c, d, e, f, g, h, i, j, t1, t2, m[64];
+
+	/* initialization */
+	for (i = 0, j = 0; i < 16; ++i, j += 4)
+		m[i] = (data[j] << 24) | (data[j + 1] << 16) |
+			(data[j + 2] << 8) | (data[j + 3]);
+	for ( ; i < 64; ++i)
+		m[i] = SIG1(m[i - 2]) + m[i - 7] + SIG0(m[i - 15]) + m[i - 16];
+
+	a = ctx->state[0];
+	b = ctx->state[1];
+	c = ctx->state[2];
+	d = ctx->state[3];
+	e = ctx->state[4];
+	f = ctx->state[5];
+	g = ctx->state[6];
+	h = ctx->state[7];
+
+	for (i = 0; i < 64; ++i) {
+		t1 = h + EP1(e) + CH(e, f, g) + k[i] + m[i];
+		t2 = EP0(a) + MAJ(a, b, c);
+		h = g;
+		g = f;
+		f = e;
+		e = d + t1;
+		d = c;
+		c = b;
+		b = a;
+		a = t1 + t2;
+	}
+
+	ctx->state[0] += a;
+	ctx->state[1] += b;
+	ctx->state[2] += c;
+	ctx->state[3] += d;
+	ctx->state[4] += e;
+	ctx->state[5] += f;
+	ctx->state[6] += g;
+	ctx->state[7] += h;
+}
+
+static void sha256_init(struct sha256_ctx *ctx)
+{
+	ctx->datalen = 0;
+	ctx->bitlen = 0;
+	ctx->state[0] = 0x6a09e667;
+	ctx->state[1] = 0xbb67ae85;
+	ctx->state[2] = 0x3c6ef372;
+	ctx->state[3] = 0xa54ff53a;
+	ctx->state[4] = 0x510e527f;
+	ctx->state[5] = 0x9b05688c;
+	ctx->state[6] = 0x1f83d9ab;
+	ctx->state[7] = 0x5be0cd19;
+}
+
+static void sha256_update(struct sha256_ctx *ctx, const uint8_t *data, size_t len)
+{
+	uint32_t i;
+
+	for (i = 0; i < len; ++i) {
+		ctx->data[ctx->datalen] = data[i];
+		ctx->datalen++;
+		if (ctx->datalen == 64) {
+			/* 64 byte = 512 bit  means the buffer ctx->data has
+			 * fully stored one chunk of message,
+			 * so do the sha256 hash map for the current chunk.
+			 */
+			sha256_transform(ctx, ctx->data);
+			ctx->bitlen += 512;
+			ctx->datalen = 0;
+		}
+	}
+}
+
+static void sha256_final(struct sha256_ctx *ctx, uint8_t *hash)
+{
+	uint32_t i;
+
+	i = ctx->datalen;
+
+	/* Pad whatever data is left in the buffer. */
+	if (ctx->datalen < 56) {
+		ctx->data[i++] = 0x80;  /* pad 10000000 = 0x80 */
+		while (i < 56)
+			ctx->data[i++] = 0x00;
+	} else {
+		ctx->data[i++] = 0x80;
+		while (i < 64)
+			ctx->data[i++] = 0x00;
+		sha256_transform(ctx, ctx->data);
+		memset(ctx->data, 0, 56);
+	}
+
+	/* Append to the padding the total message's length in bits and transform. */
+	ctx->bitlen += ctx->datalen * 8;
+	ctx->data[63] = ctx->bitlen;
+	ctx->data[62] = ctx->bitlen >> 8;
+	ctx->data[61] = ctx->bitlen >> 16;
+	ctx->data[60] = ctx->bitlen >> 24;
+	ctx->data[59] = ctx->bitlen >> 32;
+	ctx->data[58] = ctx->bitlen >> 40;
+	ctx->data[57] = ctx->bitlen >> 48;
+	ctx->data[56] = ctx->bitlen >> 56;
+	sha256_transform(ctx, ctx->data);
+
+	/* copying the final state to the output hash(use big endian). */
+	for (i = 0; i < 4; ++i) {
+		hash[i]      = (ctx->state[0] >> (24 - i * 8)) & 0x000000ff;
+		hash[i + 4]  = (ctx->state[1] >> (24 - i * 8)) & 0x000000ff;
+		hash[i + 8]  = (ctx->state[2] >> (24 - i * 8)) & 0x000000ff;
+		hash[i + 12] = (ctx->state[3] >> (24 - i * 8)) & 0x000000ff;
+		hash[i + 16] = (ctx->state[4] >> (24 - i * 8)) & 0x000000ff;
+		hash[i + 20] = (ctx->state[5] >> (24 - i * 8)) & 0x000000ff;
+		hash[i + 24] = (ctx->state[6] >> (24 - i * 8)) & 0x000000ff;
+		hash[i + 28] = (ctx->state[7] >> (24 - i * 8)) & 0x000000ff;
+	}
+}
+
+int hmac_sha256(const uint8_t *plaintext, ssize_t psize, uint8_t *output)
+{
+	struct sha256_ctx ctx;
+
+	sha256_init(&ctx);
+	sha256_update(&ctx, plaintext, psize);
+	sha256_final(&ctx, output);
+	return 0;
+}