crypto/fsl: Add fixup for crypto node

Era property is added in the crypto node in device tree.
Move the code to do so from arch/powerpc/mpc8xxx/fdt.c to
drivers/sec/sec.c so that it can be used across arm and
powerpc platforms having crypto node.

Signed-off-by: Ruchika Gupta <ruchika.gupta@freescale.com>
[York Sun: Fix commit message indentation]
Reviewed-by: York Sun <yorksun@freescale.com>

2 files changed, 185 insertions, 0 deletions

diff --git a/drivers/crypto/fsl/Makefile b/drivers/crypto/fsl/Makefile
index cb13d2e..067d0a9 100644
--- a/drivers/crypto/fsl/Makefile
+++ b/drivers/crypto/fsl/Makefile
@@ -6,5 +6,6 @@
 # Version 2 as published by the Free Software Foundation.
 #
 
+obj-y += sec.o
 obj-$(CONFIG_FSL_CAAM) += jr.o fsl_hash.o jobdesc.o error.o
 obj-$(CONFIG_CMD_BLOB) += fsl_blob.o
diff --git a/drivers/crypto/fsl/sec.c b/drivers/crypto/fsl/sec.c
new file mode 100644
index 0000000..443ee96
--- /dev/null
+++ b/drivers/crypto/fsl/sec.c
@@ -0,0 +1,184 @@
+/*
+ * Copyright 2014 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <libfdt.h>
+#include <fdt_support.h>
+#if CONFIG_SYS_FSL_SEC_COMPAT == 2 || CONFIG_SYS_FSL_SEC_COMPAT >= 4
+#include <fsl_sec.h>
+#endif
+
+/*
+ * update crypto node properties to a specified revision of the SEC
+ * called with sec_rev == 0 if not on an E processor
+ */
+#if CONFIG_SYS_FSL_SEC_COMPAT == 2 /* SEC 2.x/3.x */
+void fdt_fixup_crypto_node(void *blob, int sec_rev)
+{
+	static const struct sec_rev_prop {
+		u32 sec_rev;
+		u32 num_channels;
+		u32 channel_fifo_len;
+		u32 exec_units_mask;
+		u32 descriptor_types_mask;
+	} sec_rev_prop_list[] = {
+		{ 0x0200, 4, 24, 0x07e, 0x01010ebf }, /* SEC 2.0 */
+		{ 0x0201, 4, 24, 0x0fe, 0x012b0ebf }, /* SEC 2.1 */
+		{ 0x0202, 1, 24, 0x04c, 0x0122003f }, /* SEC 2.2 */
+		{ 0x0204, 4, 24, 0x07e, 0x012b0ebf }, /* SEC 2.4 */
+		{ 0x0300, 4, 24, 0x9fe, 0x03ab0ebf }, /* SEC 3.0 */
+		{ 0x0301, 4, 24, 0xbfe, 0x03ab0ebf }, /* SEC 3.1 */
+		{ 0x0303, 4, 24, 0x97c, 0x03a30abf }, /* SEC 3.3 */
+	};
+	static char compat_strlist[ARRAY_SIZE(sec_rev_prop_list) *
+				   sizeof("fsl,secX.Y")];
+	int crypto_node, sec_idx, err;
+	char *p;
+	u32 val;
+
+	/* locate crypto node based on lowest common compatible */
+	crypto_node = fdt_node_offset_by_compatible(blob, -1, "fsl,sec2.0");
+	if (crypto_node == -FDT_ERR_NOTFOUND)
+		return;
+
+	/* delete it if not on an E-processor */
+	if (crypto_node > 0 && !sec_rev) {
+		fdt_del_node(blob, crypto_node);
+		return;
+	}
+
+	/* else we got called for possible uprev */
+	for (sec_idx = 0; sec_idx < ARRAY_SIZE(sec_rev_prop_list); sec_idx++)
+		if (sec_rev_prop_list[sec_idx].sec_rev == sec_rev)
+			break;
+
+	if (sec_idx == ARRAY_SIZE(sec_rev_prop_list)) {
+		puts("warning: unknown SEC revision number\n");
+		return;
+	}
+
+	val = cpu_to_fdt32(sec_rev_prop_list[sec_idx].num_channels);
+	err = fdt_setprop(blob, crypto_node, "fsl,num-channels", &val, 4);
+	if (err < 0)
+		printf("WARNING: could not set crypto property: %s\n",
+		       fdt_strerror(err));
+
+	val = cpu_to_fdt32(sec_rev_prop_list[sec_idx].descriptor_types_mask);
+	err = fdt_setprop(blob, crypto_node, "fsl,descriptor-types-mask",
+			  &val, 4);
+	if (err < 0)
+		printf("WARNING: could not set crypto property: %s\n",
+		       fdt_strerror(err));
+
+	val = cpu_to_fdt32(sec_rev_prop_list[sec_idx].exec_units_mask);
+	err = fdt_setprop(blob, crypto_node, "fsl,exec-units-mask", &val, 4);
+	if (err < 0)
+		printf("WARNING: could not set crypto property: %s\n",
+		       fdt_strerror(err));
+
+	val = cpu_to_fdt32(sec_rev_prop_list[sec_idx].channel_fifo_len);
+	err = fdt_setprop(blob, crypto_node, "fsl,channel-fifo-len", &val, 4);
+	if (err < 0)
+		printf("WARNING: could not set crypto property: %s\n",
+		       fdt_strerror(err));
+
+	val = 0;
+	while (sec_idx >= 0) {
+		p = compat_strlist + val;
+		val += sprintf(p, "fsl,sec%d.%d",
+			(sec_rev_prop_list[sec_idx].sec_rev & 0xff00) >> 8,
+			sec_rev_prop_list[sec_idx].sec_rev & 0x00ff) + 1;
+		sec_idx--;
+	}
+	err = fdt_setprop(blob, crypto_node, "compatible", &compat_strlist,
+			  val);
+	if (err < 0)
+		printf("WARNING: could not set crypto property: %s\n",
+		       fdt_strerror(err));
+}
+#elif CONFIG_SYS_FSL_SEC_COMPAT >= 4  /* SEC4 */
+static u8 caam_get_era(void)
+{
+	static const struct {
+		u16 ip_id;
+		u8 maj_rev;
+		u8 era;
+	} caam_eras[] = {
+		{0x0A10, 1, 1},
+		{0x0A10, 2, 2},
+		{0x0A12, 1, 3},
+		{0x0A14, 1, 3},
+		{0x0A14, 2, 4},
+		{0x0A16, 1, 4},
+		{0x0A10, 3, 4},
+		{0x0A11, 1, 4},
+		{0x0A18, 1, 4},
+		{0x0A11, 2, 5},
+		{0x0A12, 2, 5},
+		{0x0A13, 1, 5},
+		{0x0A1C, 1, 5}
+	};
+
+	ccsr_sec_t __iomem *sec = (void __iomem *)CONFIG_SYS_FSL_SEC_ADDR;
+	u32 secvid_ms = sec_in32(&sec->secvid_ms);
+	u32 ccbvid = sec_in32(&sec->ccbvid);
+	u16 ip_id = (secvid_ms & SEC_SECVID_MS_IPID_MASK) >>
+				SEC_SECVID_MS_IPID_SHIFT;
+	u8 maj_rev = (secvid_ms & SEC_SECVID_MS_MAJ_REV_MASK) >>
+				SEC_SECVID_MS_MAJ_REV_SHIFT;
+	u8 era = (ccbvid & SEC_CCBVID_ERA_MASK) >> SEC_CCBVID_ERA_SHIFT;
+
+	int i;
+
+	if (era)	/* This is '0' prior to CAAM ERA-6 */
+		return era;
+
+	for (i = 0; i < ARRAY_SIZE(caam_eras); i++)
+		if (caam_eras[i].ip_id == ip_id &&
+		    caam_eras[i].maj_rev == maj_rev)
+			return caam_eras[i].era;
+
+	return 0;
+}
+
+static void fdt_fixup_crypto_era(void *blob, u32 era)
+{
+	int err;
+	int crypto_node;
+
+	crypto_node = fdt_path_offset(blob, "crypto");
+	if (crypto_node < 0) {
+		printf("WARNING: Missing crypto node\n");
+		return;
+	}
+
+	err = fdt_setprop(blob, crypto_node, "fsl,sec-era", &era,
+			  sizeof(era));
+	if (err < 0) {
+		printf("ERROR: could not set fsl,sec-era property: %s\n",
+		       fdt_strerror(err));
+	}
+}
+
+void fdt_fixup_crypto_node(void *blob, int sec_rev)
+{
+	u8 era;
+
+	if (!sec_rev) {
+		fdt_del_node_and_alias(blob, "crypto");
+		return;
+	}
+
+	/* Add SEC ERA information in compatible */
+	era = caam_get_era();
+	if (era) {
+		fdt_fixup_crypto_era(blob, era);
+	} else {
+		printf("WARNING: Unable to get ERA for CAAM rev: %d\n",
+		       sec_rev);
+	}
+}
+#endif