Adding upstream version 2.8.0+dfsg.upstream/2.8.0+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 462 insertions, 0 deletions

diff --git a/drivers/nxp/sfp/fuse_prov.c b/drivers/nxp/sfp/fuse_prov.c
new file mode 100644
index 0000000..165474f
--- /dev/null
+++ b/drivers/nxp/sfp/fuse_prov.c
@@ -0,0 +1,462 @@
+/*
+ * Copyright 2021 NXP
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <caam.h>
+#include <common/debug.h>
+#include <dcfg.h>
+#include <drivers/delay_timer.h>
+#include <fuse_prov.h>
+#include <sfp.h>
+#include <sfp_error_codes.h>
+
+
+static int write_a_fuse(uint32_t *fuse_addr, uint32_t *fuse_hdr_val,
+			uint32_t mask)
+{
+	uint32_t last_stored_val = sfp_read32(fuse_addr);
+
+	 /* Check if fuse already blown or not */
+	if ((last_stored_val & mask) == mask) {
+		return ERROR_ALREADY_BLOWN;
+	}
+
+	 /* Write fuse in mirror registers */
+	sfp_write32(fuse_addr, last_stored_val | (*fuse_hdr_val & mask));
+
+	 /* Read back to check if write success */
+	if (sfp_read32(fuse_addr) != (last_stored_val | (*fuse_hdr_val & mask))) {
+		return ERROR_WRITE;
+	}
+
+	return 0;
+}
+
+static int write_fuses(uint32_t *fuse_addr, uint32_t *fuse_hdr_val, uint8_t len)
+{
+	int i;
+
+	 /* Check if fuse already blown or not */
+	for (i = 0; i < len; i++) {
+		if (sfp_read32(&fuse_addr[i]) != 0) {
+			return ERROR_ALREADY_BLOWN;
+		}
+	}
+
+	 /* Write fuse in mirror registers */
+	for (i = 0; i < len; i++) {
+		sfp_write32(&fuse_addr[i], fuse_hdr_val[i]);
+	}
+
+	 /* Read back to check if write success */
+	for (i = 0; i < len; i++) {
+		if (sfp_read32(&fuse_addr[i]) != fuse_hdr_val[i]) {
+			return ERROR_WRITE;
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * This function program Super Root Key Hash (SRKH) in fuse
+ * registers.
+ */
+static int prog_srkh(struct fuse_hdr_t *fuse_hdr,
+		     struct sfp_ccsr_regs_t *sfp_ccsr_regs)
+{
+	int ret = 0;
+
+	ret = write_fuses(sfp_ccsr_regs->srk_hash, fuse_hdr->srkh, 8);
+
+	if (ret != 0) {
+		ret = (ret == ERROR_ALREADY_BLOWN) ?
+			ERROR_SRKH_ALREADY_BLOWN : ERROR_SRKH_WRITE;
+	}
+
+	return ret;
+}
+
+/* This function program OEMUID[0-4] in fuse registers. */
+static int prog_oemuid(struct fuse_hdr_t *fuse_hdr,
+		       struct sfp_ccsr_regs_t *sfp_ccsr_regs)
+{
+	int i, ret = 0;
+
+	for (i = 0; i < 5; i++) {
+		 /* Check OEMUIDx to be blown or not */
+		if (((fuse_hdr->flags >> (FLAG_OUID0_SHIFT + i)) & 0x1) != 0) {
+			 /* Check if OEMUID[i] already blown or not */
+			ret = write_fuses(&sfp_ccsr_regs->oem_uid[i],
+					 &fuse_hdr->oem_uid[i], 1);
+
+			if (ret != 0) {
+				ret = (ret == ERROR_ALREADY_BLOWN) ?
+					ERROR_OEMUID_ALREADY_BLOWN
+					: ERROR_OEMUID_WRITE;
+			}
+		}
+	}
+	return ret;
+}
+
+/* This function program DCV[0-1], DRV[0-1] in fuse registers. */
+static int prog_debug(struct fuse_hdr_t *fuse_hdr,
+		      struct sfp_ccsr_regs_t *sfp_ccsr_regs)
+{
+	int ret;
+
+	 /* Check DCV to be blown or not */
+	if (((fuse_hdr->flags >> (FLAG_DCV0_SHIFT)) & 0x3) != 0) {
+		 /* Check if DCV[i] already blown or not */
+		ret = write_fuses(sfp_ccsr_regs->dcv, fuse_hdr->dcv, 2);
+
+		if (ret != 0) {
+			ret = (ret == ERROR_ALREADY_BLOWN) ?
+				ERROR_DCV_ALREADY_BLOWN
+				: ERROR_DCV_WRITE;
+		}
+	}
+
+	 /* Check DRV to be blown or not */
+	if ((((fuse_hdr->flags >> (FLAG_DRV0_SHIFT)) & 0x3)) != 0) {
+		 /* Check if DRV[i] already blown or not */
+		ret = write_fuses(sfp_ccsr_regs->drv, fuse_hdr->drv, 2);
+
+		if (ret != 0) {
+			ret = (ret == ERROR_ALREADY_BLOWN) ?
+				ERROR_DRV_ALREADY_BLOWN
+				: ERROR_DRV_WRITE;
+		} else {
+			 /* Check for DRV hamming error */
+			if (sfp_read32((void *)(get_sfp_addr()
+							+ SFP_SVHESR_OFFSET))
+				& SFP_SVHESR_DRV_MASK) {
+				return ERROR_DRV_HAMMING_ERROR;
+			}
+		}
+	}
+
+	return 0;
+}
+
+ /*
+  * Turn a 256-bit random value (32 bytes) into an OTPMK code word
+  * modifying the input data array in place
+  */
+static void otpmk_make_code_word_256(uint8_t *otpmk, bool minimal_flag)
+{
+	int i;
+	uint8_t parity_bit;
+	uint8_t code_bit;
+
+	if (minimal_flag == true) {
+		 /*
+		  * Force bits 252, 253, 254 and 255 to 1
+		  * This is because these fuses may have already been blown
+		  * and the OTPMK cannot force them back to 0
+		  */
+		otpmk[252/8] |= (1 << (252%8));
+		otpmk[253/8] |= (1 << (253%8));
+		otpmk[254/8] |= (1 << (254%8));
+		otpmk[255/8] |= (1 << (255%8));
+	}
+
+	 /* Generate the hamming code for the code word */
+	parity_bit = 0;
+	code_bit = 0;
+	for (i = 0; i < 256; i += 1) {
+		if ((otpmk[i/8] & (1 << (i%8))) != 0) {
+			parity_bit ^= 1;
+			code_bit   ^= i;
+		}
+	}
+
+	 /* Inverting otpmk[code_bit] will cause the otpmk
+	  * to become a valid code word (except for overall parity)
+	  */
+	if (code_bit < 252) {
+		otpmk[code_bit/8] ^= (1 << (code_bit % 8));
+		parity_bit  ^= 1;  // account for flipping a bit changing parity
+	} else {
+		 /* Invert two bits:  (code_bit - 4) and 4
+		  * Because we invert two bits, no need to touch the parity bit
+		  */
+		otpmk[(code_bit - 4)/8] ^= (1 << ((code_bit - 4) % 8));
+		otpmk[4/8] ^= (1 << (4 % 8));
+	}
+
+	 /* Finally, adjust the overall parity of the otpmk
+	  * otpmk bit 0
+	  */
+	otpmk[0] ^= parity_bit;
+}
+
+/* This function program One Time Programmable Master Key (OTPMK)
+ *  in fuse registers.
+ */
+static int prog_otpmk(struct fuse_hdr_t *fuse_hdr,
+		      struct sfp_ccsr_regs_t *sfp_ccsr_regs)
+{
+	int ret = 0;
+	uint32_t otpmk_flags;
+	uint32_t otpmk_random[8] __aligned(CACHE_WRITEBACK_GRANULE);
+
+	otpmk_flags = (fuse_hdr->flags >> (FLAG_OTPMK_SHIFT)) & FLAG_OTPMK_MASK;
+
+	switch (otpmk_flags) {
+	case PROG_OTPMK_MIN:
+		memset(fuse_hdr->otpmk, 0, sizeof(fuse_hdr->otpmk));
+
+		 /* Minimal OTPMK value (252-255 bits set to 1) */
+		fuse_hdr->otpmk[0] |= OTPMK_MIM_BITS_MASK;
+		break;
+
+	case PROG_OTPMK_RANDOM:
+		if (is_sec_enabled() == false) {
+			ret = ERROR_OTPMK_SEC_DISABLED;
+			goto out;
+		}
+
+		 /* Generate Random number using CAAM for OTPMK */
+		memset(otpmk_random, 0, sizeof(otpmk_random));
+		if (get_rand_bytes_hw((uint8_t *)otpmk_random,
+				      sizeof(otpmk_random)) != 0) {
+			ret = ERROR_OTPMK_SEC_ERROR;
+			goto out;
+		}
+
+		 /* Run hamming over random no. to make OTPMK */
+		otpmk_make_code_word_256((uint8_t *)otpmk_random, false);
+
+		 /* Swap OTPMK */
+		fuse_hdr->otpmk[0] = otpmk_random[7];
+		fuse_hdr->otpmk[1] = otpmk_random[6];
+		fuse_hdr->otpmk[2] = otpmk_random[5];
+		fuse_hdr->otpmk[3] = otpmk_random[4];
+		fuse_hdr->otpmk[4] = otpmk_random[3];
+		fuse_hdr->otpmk[5] = otpmk_random[2];
+		fuse_hdr->otpmk[6] = otpmk_random[1];
+		fuse_hdr->otpmk[7] = otpmk_random[0];
+		break;
+
+	case PROG_OTPMK_USER:
+		break;
+
+	case PROG_OTPMK_RANDOM_MIN:
+		 /* Here assumption is that user is aware of minimal OTPMK
+		  * already blown.
+		  */
+
+		 /* Generate Random number using CAAM for OTPMK */
+		if (is_sec_enabled() == false) {
+			ret = ERROR_OTPMK_SEC_DISABLED;
+			goto out;
+		}
+
+		memset(otpmk_random, 0, sizeof(otpmk_random));
+		if (get_rand_bytes_hw((uint8_t *)otpmk_random,
+				      sizeof(otpmk_random)) != 0) {
+			ret = ERROR_OTPMK_SEC_ERROR;
+			goto out;
+		}
+
+		 /* Run hamming over random no. to make OTPMK */
+		otpmk_make_code_word_256((uint8_t *)otpmk_random, true);
+
+		 /* Swap OTPMK */
+		fuse_hdr->otpmk[0] = otpmk_random[7];
+		fuse_hdr->otpmk[1] = otpmk_random[6];
+		fuse_hdr->otpmk[2] = otpmk_random[5];
+		fuse_hdr->otpmk[3] = otpmk_random[4];
+		fuse_hdr->otpmk[4] = otpmk_random[3];
+		fuse_hdr->otpmk[5] = otpmk_random[2];
+		fuse_hdr->otpmk[6] = otpmk_random[1];
+		fuse_hdr->otpmk[7] = otpmk_random[0];
+		break;
+
+	case PROG_OTPMK_USER_MIN:
+		 /*
+		  * Here assumption is that user is aware of minimal OTPMK
+		  * already blown. Check if minimal bits are set in user
+		  * supplied OTPMK.
+		  */
+		if ((fuse_hdr->otpmk[0] & OTPMK_MIM_BITS_MASK) !=
+							OTPMK_MIM_BITS_MASK) {
+			ret = ERROR_OTPMK_USER_MIN;
+			goto out;
+		}
+		break;
+
+	default:
+		ret = 0;
+		goto out;
+	}
+
+	ret = write_fuses(sfp_ccsr_regs->otpmk, fuse_hdr->otpmk, 8);
+
+	if (ret != 0) {
+		ret = (ret == ERROR_ALREADY_BLOWN) ?
+			ERROR_OTPMK_ALREADY_BLOWN
+			: ERROR_OTPMK_WRITE;
+	} else {
+		 /* Check for DRV hamming error */
+		if ((sfp_read32((void *)(get_sfp_addr() + SFP_SVHESR_OFFSET))
+			& SFP_SVHESR_OTPMK_MASK) != 0) {
+			ret = ERROR_OTPMK_HAMMING_ERROR;
+		}
+	}
+
+out:
+	return ret;
+}
+
+/* This function program OSPR1 in fuse registers.
+ */
+static int prog_ospr1(struct fuse_hdr_t *fuse_hdr,
+		      struct sfp_ccsr_regs_t *sfp_ccsr_regs)
+{
+	int ret;
+	uint32_t mask = 0;
+
+#ifdef NXP_SFP_VER_3_4
+	if (((fuse_hdr->flags >> FLAG_MC_SHIFT) & 0x1) != 0) {
+		mask = OSPR1_MC_MASK;
+	}
+#endif
+	if (((fuse_hdr->flags >> FLAG_DBG_LVL_SHIFT) & 0x1) != 0) {
+		mask = mask | OSPR1_DBG_LVL_MASK;
+	}
+
+	ret = write_a_fuse(&sfp_ccsr_regs->ospr1, &fuse_hdr->ospr1, mask);
+
+	if (ret != 0) {
+		ret = (ret == ERROR_ALREADY_BLOWN) ?
+				ERROR_OSPR1_ALREADY_BLOWN
+				: ERROR_OSPR1_WRITE;
+	}
+
+	return ret;
+}
+
+/* This function program SYSCFG in fuse registers.
+ */
+static int prog_syscfg(struct fuse_hdr_t *fuse_hdr,
+		       struct sfp_ccsr_regs_t *sfp_ccsr_regs)
+{
+	int ret;
+
+	 /* Check if SYSCFG already blown or not */
+	ret = write_a_fuse(&sfp_ccsr_regs->ospr, &fuse_hdr->sc, OSPR0_SC_MASK);
+
+	if (ret != 0) {
+		ret = (ret == ERROR_ALREADY_BLOWN) ?
+				ERROR_SC_ALREADY_BLOWN
+				: ERROR_SC_WRITE;
+	}
+
+	return ret;
+}
+
+/* This function does fuse provisioning.
+ */
+int provision_fuses(unsigned long long fuse_scr_addr,
+		    bool en_povdd_status)
+{
+	struct fuse_hdr_t *fuse_hdr = NULL;
+	struct sfp_ccsr_regs_t *sfp_ccsr_regs = (void *)(get_sfp_addr()
+							+ SFP_FUSE_REGS_OFFSET);
+	int ret = 0;
+
+	fuse_hdr = (struct fuse_hdr_t *)fuse_scr_addr;
+
+	/*
+	 * Check for Write Protect (WP) fuse. If blown then do
+	 *  no fuse provisioning.
+	 */
+	if ((sfp_read32(&sfp_ccsr_regs->ospr) & 0x1) != 0) {
+		goto out;
+	}
+
+	 /* Check if SRKH to be blown or not */
+	if (((fuse_hdr->flags >> FLAG_SRKH_SHIFT) & 0x1) != 0) {
+		INFO("Fuse: Program SRKH\n");
+		ret = prog_srkh(fuse_hdr, sfp_ccsr_regs);
+		if (ret != 0) {
+			error_handler(ret);
+			goto out;
+		}
+	}
+
+	 /* Check if OEMUID to be blown or not */
+	if (((fuse_hdr->flags >> FLAG_OUID0_SHIFT) & FLAG_OUID_MASK) != 0) {
+		INFO("Fuse: Program OEMUIDs\n");
+		ret = prog_oemuid(fuse_hdr, sfp_ccsr_regs);
+		if (ret != 0) {
+			error_handler(ret);
+			goto out;
+		}
+	}
+
+	 /* Check if Debug values to be blown or not */
+	if (((fuse_hdr->flags >> FLAG_DCV0_SHIFT) & FLAG_DEBUG_MASK) != 0) {
+		INFO("Fuse: Program Debug values\n");
+		ret = prog_debug(fuse_hdr, sfp_ccsr_regs);
+		if (ret != 0) {
+			error_handler(ret);
+			goto out;
+		}
+	}
+
+	 /* Check if OTPMK values to be blown or not */
+	if (((fuse_hdr->flags >> FLAG_OTPMK_SHIFT) & PROG_NO_OTPMK) !=
+		PROG_NO_OTPMK) {
+		INFO("Fuse: Program OTPMK\n");
+		ret = prog_otpmk(fuse_hdr, sfp_ccsr_regs);
+		if (ret != 0) {
+			error_handler(ret);
+			goto out;
+		}
+	}
+
+
+	 /* Check if MC or DBG LVL to be blown or not */
+	if ((((fuse_hdr->flags >> FLAG_MC_SHIFT) & 0x1) != 0) ||
+		(((fuse_hdr->flags >> FLAG_DBG_LVL_SHIFT) & 0x1) != 0)) {
+		INFO("Fuse: Program OSPR1\n");
+		ret = prog_ospr1(fuse_hdr, sfp_ccsr_regs);
+		if (ret != 0) {
+			error_handler(ret);
+			goto out;
+		}
+	}
+
+	 /* Check if SYSCFG to be blown or not */
+	if (((fuse_hdr->flags >> FLAG_SYSCFG_SHIFT) & 0x1) != 0) {
+		INFO("Fuse: Program SYSCFG\n");
+		ret = prog_syscfg(fuse_hdr, sfp_ccsr_regs);
+		if (ret != 0) {
+			error_handler(ret);
+			goto out;
+		}
+	}
+
+	if (en_povdd_status) {
+		ret = sfp_program_fuses();
+		if (ret != 0) {
+			error_handler(ret);
+			goto out;
+		}
+	}
+out:
+	return ret;
+}