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-rw-r--r--drivers/mtd/nand/raw/nand_timings.c642
1 files changed, 642 insertions, 0 deletions
diff --git a/drivers/mtd/nand/raw/nand_timings.c b/drivers/mtd/nand/raw/nand_timings.c
new file mode 100644
index 000000000..481b56d5f
--- /dev/null
+++ b/drivers/mtd/nand/raw/nand_timings.c
@@ -0,0 +1,642 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2014 Free Electrons
+ *
+ * Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
+ */
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <linux/export.h>
+
+#include "internals.h"
+
+#define ONFI_DYN_TIMING_MAX U16_MAX
+
+/*
+ * For non-ONFI chips we use the highest possible value for tPROG and tBERS.
+ * tR and tCCS will take the default values precised in the ONFI specification
+ * for timing mode 0, respectively 200us and 500ns.
+ *
+ * These four values are tweaked to be more accurate in the case of ONFI chips.
+ */
+static const struct nand_interface_config onfi_sdr_timings[] = {
+ /* Mode 0 */
+ {
+ .type = NAND_SDR_IFACE,
+ .timings.mode = 0,
+ .timings.sdr = {
+ .tCCS_min = 500000,
+ .tR_max = 200000000,
+ .tPROG_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tBERS_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tADL_min = 400000,
+ .tALH_min = 20000,
+ .tALS_min = 50000,
+ .tAR_min = 25000,
+ .tCEA_max = 100000,
+ .tCEH_min = 20000,
+ .tCH_min = 20000,
+ .tCHZ_max = 100000,
+ .tCLH_min = 20000,
+ .tCLR_min = 20000,
+ .tCLS_min = 50000,
+ .tCOH_min = 0,
+ .tCS_min = 70000,
+ .tDH_min = 20000,
+ .tDS_min = 40000,
+ .tFEAT_max = 1000000,
+ .tIR_min = 10000,
+ .tITC_max = 1000000,
+ .tRC_min = 100000,
+ .tREA_max = 40000,
+ .tREH_min = 30000,
+ .tRHOH_min = 0,
+ .tRHW_min = 200000,
+ .tRHZ_max = 200000,
+ .tRLOH_min = 0,
+ .tRP_min = 50000,
+ .tRR_min = 40000,
+ .tRST_max = 250000000000ULL,
+ .tWB_max = 200000,
+ .tWC_min = 100000,
+ .tWH_min = 30000,
+ .tWHR_min = 120000,
+ .tWP_min = 50000,
+ .tWW_min = 100000,
+ },
+ },
+ /* Mode 1 */
+ {
+ .type = NAND_SDR_IFACE,
+ .timings.mode = 1,
+ .timings.sdr = {
+ .tCCS_min = 500000,
+ .tR_max = 200000000,
+ .tPROG_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tBERS_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tADL_min = 400000,
+ .tALH_min = 10000,
+ .tALS_min = 25000,
+ .tAR_min = 10000,
+ .tCEA_max = 45000,
+ .tCEH_min = 20000,
+ .tCH_min = 10000,
+ .tCHZ_max = 50000,
+ .tCLH_min = 10000,
+ .tCLR_min = 10000,
+ .tCLS_min = 25000,
+ .tCOH_min = 15000,
+ .tCS_min = 35000,
+ .tDH_min = 10000,
+ .tDS_min = 20000,
+ .tFEAT_max = 1000000,
+ .tIR_min = 0,
+ .tITC_max = 1000000,
+ .tRC_min = 50000,
+ .tREA_max = 30000,
+ .tREH_min = 15000,
+ .tRHOH_min = 15000,
+ .tRHW_min = 100000,
+ .tRHZ_max = 100000,
+ .tRLOH_min = 0,
+ .tRP_min = 25000,
+ .tRR_min = 20000,
+ .tRST_max = 500000000,
+ .tWB_max = 100000,
+ .tWC_min = 45000,
+ .tWH_min = 15000,
+ .tWHR_min = 80000,
+ .tWP_min = 25000,
+ .tWW_min = 100000,
+ },
+ },
+ /* Mode 2 */
+ {
+ .type = NAND_SDR_IFACE,
+ .timings.mode = 2,
+ .timings.sdr = {
+ .tCCS_min = 500000,
+ .tR_max = 200000000,
+ .tPROG_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tBERS_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tADL_min = 400000,
+ .tALH_min = 10000,
+ .tALS_min = 15000,
+ .tAR_min = 10000,
+ .tCEA_max = 30000,
+ .tCEH_min = 20000,
+ .tCH_min = 10000,
+ .tCHZ_max = 50000,
+ .tCLH_min = 10000,
+ .tCLR_min = 10000,
+ .tCLS_min = 15000,
+ .tCOH_min = 15000,
+ .tCS_min = 25000,
+ .tDH_min = 5000,
+ .tDS_min = 15000,
+ .tFEAT_max = 1000000,
+ .tIR_min = 0,
+ .tITC_max = 1000000,
+ .tRC_min = 35000,
+ .tREA_max = 25000,
+ .tREH_min = 15000,
+ .tRHOH_min = 15000,
+ .tRHW_min = 100000,
+ .tRHZ_max = 100000,
+ .tRLOH_min = 0,
+ .tRR_min = 20000,
+ .tRST_max = 500000000,
+ .tWB_max = 100000,
+ .tRP_min = 17000,
+ .tWC_min = 35000,
+ .tWH_min = 15000,
+ .tWHR_min = 80000,
+ .tWP_min = 17000,
+ .tWW_min = 100000,
+ },
+ },
+ /* Mode 3 */
+ {
+ .type = NAND_SDR_IFACE,
+ .timings.mode = 3,
+ .timings.sdr = {
+ .tCCS_min = 500000,
+ .tR_max = 200000000,
+ .tPROG_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tBERS_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tADL_min = 400000,
+ .tALH_min = 5000,
+ .tALS_min = 10000,
+ .tAR_min = 10000,
+ .tCEA_max = 25000,
+ .tCEH_min = 20000,
+ .tCH_min = 5000,
+ .tCHZ_max = 50000,
+ .tCLH_min = 5000,
+ .tCLR_min = 10000,
+ .tCLS_min = 10000,
+ .tCOH_min = 15000,
+ .tCS_min = 25000,
+ .tDH_min = 5000,
+ .tDS_min = 10000,
+ .tFEAT_max = 1000000,
+ .tIR_min = 0,
+ .tITC_max = 1000000,
+ .tRC_min = 30000,
+ .tREA_max = 20000,
+ .tREH_min = 10000,
+ .tRHOH_min = 15000,
+ .tRHW_min = 100000,
+ .tRHZ_max = 100000,
+ .tRLOH_min = 0,
+ .tRP_min = 15000,
+ .tRR_min = 20000,
+ .tRST_max = 500000000,
+ .tWB_max = 100000,
+ .tWC_min = 30000,
+ .tWH_min = 10000,
+ .tWHR_min = 80000,
+ .tWP_min = 15000,
+ .tWW_min = 100000,
+ },
+ },
+ /* Mode 4 */
+ {
+ .type = NAND_SDR_IFACE,
+ .timings.mode = 4,
+ .timings.sdr = {
+ .tCCS_min = 500000,
+ .tR_max = 200000000,
+ .tPROG_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tBERS_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tADL_min = 400000,
+ .tALH_min = 5000,
+ .tALS_min = 10000,
+ .tAR_min = 10000,
+ .tCEA_max = 25000,
+ .tCEH_min = 20000,
+ .tCH_min = 5000,
+ .tCHZ_max = 30000,
+ .tCLH_min = 5000,
+ .tCLR_min = 10000,
+ .tCLS_min = 10000,
+ .tCOH_min = 15000,
+ .tCS_min = 20000,
+ .tDH_min = 5000,
+ .tDS_min = 10000,
+ .tFEAT_max = 1000000,
+ .tIR_min = 0,
+ .tITC_max = 1000000,
+ .tRC_min = 25000,
+ .tREA_max = 20000,
+ .tREH_min = 10000,
+ .tRHOH_min = 15000,
+ .tRHW_min = 100000,
+ .tRHZ_max = 100000,
+ .tRLOH_min = 5000,
+ .tRP_min = 12000,
+ .tRR_min = 20000,
+ .tRST_max = 500000000,
+ .tWB_max = 100000,
+ .tWC_min = 25000,
+ .tWH_min = 10000,
+ .tWHR_min = 80000,
+ .tWP_min = 12000,
+ .tWW_min = 100000,
+ },
+ },
+ /* Mode 5 */
+ {
+ .type = NAND_SDR_IFACE,
+ .timings.mode = 5,
+ .timings.sdr = {
+ .tCCS_min = 500000,
+ .tR_max = 200000000,
+ .tPROG_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tBERS_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tADL_min = 400000,
+ .tALH_min = 5000,
+ .tALS_min = 10000,
+ .tAR_min = 10000,
+ .tCEA_max = 25000,
+ .tCEH_min = 20000,
+ .tCH_min = 5000,
+ .tCHZ_max = 30000,
+ .tCLH_min = 5000,
+ .tCLR_min = 10000,
+ .tCLS_min = 10000,
+ .tCOH_min = 15000,
+ .tCS_min = 15000,
+ .tDH_min = 5000,
+ .tDS_min = 7000,
+ .tFEAT_max = 1000000,
+ .tIR_min = 0,
+ .tITC_max = 1000000,
+ .tRC_min = 20000,
+ .tREA_max = 16000,
+ .tREH_min = 7000,
+ .tRHOH_min = 15000,
+ .tRHW_min = 100000,
+ .tRHZ_max = 100000,
+ .tRLOH_min = 5000,
+ .tRP_min = 10000,
+ .tRR_min = 20000,
+ .tRST_max = 500000000,
+ .tWB_max = 100000,
+ .tWC_min = 20000,
+ .tWH_min = 7000,
+ .tWHR_min = 80000,
+ .tWP_min = 10000,
+ .tWW_min = 100000,
+ },
+ },
+};
+
+static const struct nand_interface_config onfi_nvddr_timings[] = {
+ /* Mode 0 */
+ {
+ .type = NAND_NVDDR_IFACE,
+ .timings.mode = 0,
+ .timings.nvddr = {
+ .tCCS_min = 500000,
+ .tR_max = 200000000,
+ .tPROG_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tBERS_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tAC_min = 3000,
+ .tAC_max = 25000,
+ .tADL_min = 400000,
+ .tCAD_min = 45000,
+ .tCAH_min = 10000,
+ .tCALH_min = 10000,
+ .tCALS_min = 10000,
+ .tCAS_min = 10000,
+ .tCEH_min = 20000,
+ .tCH_min = 10000,
+ .tCK_min = 50000,
+ .tCS_min = 35000,
+ .tDH_min = 5000,
+ .tDQSCK_min = 3000,
+ .tDQSCK_max = 25000,
+ .tDQSD_min = 0,
+ .tDQSD_max = 18000,
+ .tDQSHZ_max = 20000,
+ .tDQSQ_max = 5000,
+ .tDS_min = 5000,
+ .tDSC_min = 50000,
+ .tFEAT_max = 1000000,
+ .tITC_max = 1000000,
+ .tQHS_max = 6000,
+ .tRHW_min = 100000,
+ .tRR_min = 20000,
+ .tRST_max = 500000000,
+ .tWB_max = 100000,
+ .tWHR_min = 80000,
+ .tWRCK_min = 20000,
+ .tWW_min = 100000,
+ },
+ },
+ /* Mode 1 */
+ {
+ .type = NAND_NVDDR_IFACE,
+ .timings.mode = 1,
+ .timings.nvddr = {
+ .tCCS_min = 500000,
+ .tR_max = 200000000,
+ .tPROG_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tBERS_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tAC_min = 3000,
+ .tAC_max = 25000,
+ .tADL_min = 400000,
+ .tCAD_min = 45000,
+ .tCAH_min = 5000,
+ .tCALH_min = 5000,
+ .tCALS_min = 5000,
+ .tCAS_min = 5000,
+ .tCEH_min = 20000,
+ .tCH_min = 5000,
+ .tCK_min = 30000,
+ .tCS_min = 25000,
+ .tDH_min = 2500,
+ .tDQSCK_min = 3000,
+ .tDQSCK_max = 25000,
+ .tDQSD_min = 0,
+ .tDQSD_max = 18000,
+ .tDQSHZ_max = 20000,
+ .tDQSQ_max = 2500,
+ .tDS_min = 3000,
+ .tDSC_min = 30000,
+ .tFEAT_max = 1000000,
+ .tITC_max = 1000000,
+ .tQHS_max = 3000,
+ .tRHW_min = 100000,
+ .tRR_min = 20000,
+ .tRST_max = 500000000,
+ .tWB_max = 100000,
+ .tWHR_min = 80000,
+ .tWRCK_min = 20000,
+ .tWW_min = 100000,
+ },
+ },
+ /* Mode 2 */
+ {
+ .type = NAND_NVDDR_IFACE,
+ .timings.mode = 2,
+ .timings.nvddr = {
+ .tCCS_min = 500000,
+ .tR_max = 200000000,
+ .tPROG_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tBERS_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tAC_min = 3000,
+ .tAC_max = 25000,
+ .tADL_min = 400000,
+ .tCAD_min = 45000,
+ .tCAH_min = 4000,
+ .tCALH_min = 4000,
+ .tCALS_min = 4000,
+ .tCAS_min = 4000,
+ .tCEH_min = 20000,
+ .tCH_min = 4000,
+ .tCK_min = 20000,
+ .tCS_min = 15000,
+ .tDH_min = 1700,
+ .tDQSCK_min = 3000,
+ .tDQSCK_max = 25000,
+ .tDQSD_min = 0,
+ .tDQSD_max = 18000,
+ .tDQSHZ_max = 20000,
+ .tDQSQ_max = 1700,
+ .tDS_min = 2000,
+ .tDSC_min = 20000,
+ .tFEAT_max = 1000000,
+ .tITC_max = 1000000,
+ .tQHS_max = 2000,
+ .tRHW_min = 100000,
+ .tRR_min = 20000,
+ .tRST_max = 500000000,
+ .tWB_max = 100000,
+ .tWHR_min = 80000,
+ .tWRCK_min = 20000,
+ .tWW_min = 100000,
+ },
+ },
+ /* Mode 3 */
+ {
+ .type = NAND_NVDDR_IFACE,
+ .timings.mode = 3,
+ .timings.nvddr = {
+ .tCCS_min = 500000,
+ .tR_max = 200000000,
+ .tPROG_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tBERS_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tAC_min = 3000,
+ .tAC_max = 25000,
+ .tADL_min = 400000,
+ .tCAD_min = 45000,
+ .tCAH_min = 3000,
+ .tCALH_min = 3000,
+ .tCALS_min = 3000,
+ .tCAS_min = 3000,
+ .tCEH_min = 20000,
+ .tCH_min = 3000,
+ .tCK_min = 15000,
+ .tCS_min = 15000,
+ .tDH_min = 1300,
+ .tDQSCK_min = 3000,
+ .tDQSCK_max = 25000,
+ .tDQSD_min = 0,
+ .tDQSD_max = 18000,
+ .tDQSHZ_max = 20000,
+ .tDQSQ_max = 1300,
+ .tDS_min = 1500,
+ .tDSC_min = 15000,
+ .tFEAT_max = 1000000,
+ .tITC_max = 1000000,
+ .tQHS_max = 1500,
+ .tRHW_min = 100000,
+ .tRR_min = 20000,
+ .tRST_max = 500000000,
+ .tWB_max = 100000,
+ .tWHR_min = 80000,
+ .tWRCK_min = 20000,
+ .tWW_min = 100000,
+ },
+ },
+ /* Mode 4 */
+ {
+ .type = NAND_NVDDR_IFACE,
+ .timings.mode = 4,
+ .timings.nvddr = {
+ .tCCS_min = 500000,
+ .tR_max = 200000000,
+ .tPROG_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tBERS_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tAC_min = 3000,
+ .tAC_max = 25000,
+ .tADL_min = 400000,
+ .tCAD_min = 45000,
+ .tCAH_min = 2500,
+ .tCALH_min = 2500,
+ .tCALS_min = 2500,
+ .tCAS_min = 2500,
+ .tCEH_min = 20000,
+ .tCH_min = 2500,
+ .tCK_min = 12000,
+ .tCS_min = 15000,
+ .tDH_min = 1100,
+ .tDQSCK_min = 3000,
+ .tDQSCK_max = 25000,
+ .tDQSD_min = 0,
+ .tDQSD_max = 18000,
+ .tDQSHZ_max = 20000,
+ .tDQSQ_max = 1000,
+ .tDS_min = 1100,
+ .tDSC_min = 12000,
+ .tFEAT_max = 1000000,
+ .tITC_max = 1000000,
+ .tQHS_max = 1200,
+ .tRHW_min = 100000,
+ .tRR_min = 20000,
+ .tRST_max = 500000000,
+ .tWB_max = 100000,
+ .tWHR_min = 80000,
+ .tWRCK_min = 20000,
+ .tWW_min = 100000,
+ },
+ },
+ /* Mode 5 */
+ {
+ .type = NAND_NVDDR_IFACE,
+ .timings.mode = 5,
+ .timings.nvddr = {
+ .tCCS_min = 500000,
+ .tR_max = 200000000,
+ .tPROG_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tBERS_max = 1000000ULL * ONFI_DYN_TIMING_MAX,
+ .tAC_min = 3000,
+ .tAC_max = 25000,
+ .tADL_min = 400000,
+ .tCAD_min = 45000,
+ .tCAH_min = 2000,
+ .tCALH_min = 2000,
+ .tCALS_min = 2000,
+ .tCAS_min = 2000,
+ .tCEH_min = 20000,
+ .tCH_min = 2000,
+ .tCK_min = 10000,
+ .tCS_min = 15000,
+ .tDH_min = 900,
+ .tDQSCK_min = 3000,
+ .tDQSCK_max = 25000,
+ .tDQSD_min = 0,
+ .tDQSD_max = 18000,
+ .tDQSHZ_max = 20000,
+ .tDQSQ_max = 850,
+ .tDS_min = 900,
+ .tDSC_min = 10000,
+ .tFEAT_max = 1000000,
+ .tITC_max = 1000000,
+ .tQHS_max = 1000,
+ .tRHW_min = 100000,
+ .tRR_min = 20000,
+ .tRST_max = 500000000,
+ .tWB_max = 100000,
+ .tWHR_min = 80000,
+ .tWRCK_min = 20000,
+ .tWW_min = 100000,
+ },
+ },
+};
+
+/* All NAND chips share the same reset data interface: SDR mode 0 */
+const struct nand_interface_config *nand_get_reset_interface_config(void)
+{
+ return &onfi_sdr_timings[0];
+}
+
+/**
+ * onfi_find_closest_sdr_mode - Derive the closest ONFI SDR timing mode given a
+ * set of timings
+ * @spec_timings: the timings to challenge
+ */
+unsigned int
+onfi_find_closest_sdr_mode(const struct nand_sdr_timings *spec_timings)
+{
+ const struct nand_sdr_timings *onfi_timings;
+ int mode;
+
+ for (mode = ARRAY_SIZE(onfi_sdr_timings) - 1; mode > 0; mode--) {
+ onfi_timings = &onfi_sdr_timings[mode].timings.sdr;
+
+ if (spec_timings->tCCS_min <= onfi_timings->tCCS_min &&
+ spec_timings->tADL_min <= onfi_timings->tADL_min &&
+ spec_timings->tALH_min <= onfi_timings->tALH_min &&
+ spec_timings->tALS_min <= onfi_timings->tALS_min &&
+ spec_timings->tAR_min <= onfi_timings->tAR_min &&
+ spec_timings->tCEH_min <= onfi_timings->tCEH_min &&
+ spec_timings->tCH_min <= onfi_timings->tCH_min &&
+ spec_timings->tCLH_min <= onfi_timings->tCLH_min &&
+ spec_timings->tCLR_min <= onfi_timings->tCLR_min &&
+ spec_timings->tCLS_min <= onfi_timings->tCLS_min &&
+ spec_timings->tCOH_min <= onfi_timings->tCOH_min &&
+ spec_timings->tCS_min <= onfi_timings->tCS_min &&
+ spec_timings->tDH_min <= onfi_timings->tDH_min &&
+ spec_timings->tDS_min <= onfi_timings->tDS_min &&
+ spec_timings->tIR_min <= onfi_timings->tIR_min &&
+ spec_timings->tRC_min <= onfi_timings->tRC_min &&
+ spec_timings->tREH_min <= onfi_timings->tREH_min &&
+ spec_timings->tRHOH_min <= onfi_timings->tRHOH_min &&
+ spec_timings->tRHW_min <= onfi_timings->tRHW_min &&
+ spec_timings->tRLOH_min <= onfi_timings->tRLOH_min &&
+ spec_timings->tRP_min <= onfi_timings->tRP_min &&
+ spec_timings->tRR_min <= onfi_timings->tRR_min &&
+ spec_timings->tWC_min <= onfi_timings->tWC_min &&
+ spec_timings->tWH_min <= onfi_timings->tWH_min &&
+ spec_timings->tWHR_min <= onfi_timings->tWHR_min &&
+ spec_timings->tWP_min <= onfi_timings->tWP_min &&
+ spec_timings->tWW_min <= onfi_timings->tWW_min)
+ return mode;
+ }
+
+ return 0;
+}
+
+/**
+ * onfi_fill_interface_config - Initialize an interface config from a given
+ * ONFI mode
+ * @chip: The NAND chip
+ * @iface: The interface configuration to fill
+ * @type: The interface type
+ * @timing_mode: The ONFI timing mode
+ */
+void onfi_fill_interface_config(struct nand_chip *chip,
+ struct nand_interface_config *iface,
+ enum nand_interface_type type,
+ unsigned int timing_mode)
+{
+ struct onfi_params *onfi = chip->parameters.onfi;
+
+ if (WARN_ON(type != NAND_SDR_IFACE))
+ return;
+
+ if (WARN_ON(timing_mode >= ARRAY_SIZE(onfi_sdr_timings)))
+ return;
+
+ *iface = onfi_sdr_timings[timing_mode];
+
+ /*
+ * Initialize timings that cannot be deduced from timing mode:
+ * tPROG, tBERS, tR and tCCS.
+ * These information are part of the ONFI parameter page.
+ */
+ if (onfi) {
+ struct nand_sdr_timings *timings = &iface->timings.sdr;
+
+ /* microseconds -> picoseconds */
+ timings->tPROG_max = 1000000ULL * onfi->tPROG;
+ timings->tBERS_max = 1000000ULL * onfi->tBERS;
+ timings->tR_max = 1000000ULL * onfi->tR;
+
+ /* nanoseconds -> picoseconds */
+ timings->tCCS_min = 1000UL * onfi->tCCS;
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-25 02:08:46 +0000