mtd: nand: add ONFI timing mode to nand_timings converter

Add a converter to retrieve NAND timings from an ONFI NAND timing mode.
At the moment, only SDR NAND timings are supported.

Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

diff --git a/drivers/mtd/nand/Makefile b/drivers/mtd/nand/Makefile
index 542b5689eb636b0abad6501500872d376efad77a..a035e7cc6d46b7978e6b77a3fc7ebf20d9833db5 100644 (file)
--- a/drivers/mtd/nand/Makefile
+++ b/drivers/mtd/nand/Makefile
@@ -50,4 +50,4 @@ obj-$(CONFIG_MTD_NAND_GPMI_NAND)      += gpmi-nand/
 obj-$(CONFIG_MTD_NAND_XWAY)            += xway_nand.o
 obj-$(CONFIG_MTD_NAND_BCM47XXNFLASH)   += bcm47xxnflash/
 
-nand-objs := nand_base.o nand_bbt.o
+nand-objs := nand_base.o nand_bbt.o nand_timings.o

diff --git a/drivers/mtd/nand/nand_timings.c b/drivers/mtd/nand/nand_timings.c
new file mode 100644 (file)
index 0000000..8b36253
--- /dev/null
+++ b/drivers/mtd/nand/nand_timings.c
@@ -0,0 +1,253 @@
+/*
+ *  Copyright (C) 2014 Free Electrons
+ *
+ *  Author: Boris BREZILLON <boris.brezillon@free-electrons.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <linux/export.h>
+#include <linux/mtd/nand.h>
+
+static const struct nand_sdr_timings onfi_sdr_timings[] = {
+       /* Mode 0 */
+       {
+               .tADL_min = 200000,
+               .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,
+               .tRST_max = 250000000000,
+               .tWB_max = 200000,
+               .tRR_min = 40000,
+               .tWC_min = 100000,
+               .tWH_min = 30000,
+               .tWHR_min = 120000,
+               .tWP_min = 50000,
+               .tWW_min = 100000,
+       },
+       /* Mode 1 */
+       {
+               .tADL_min = 100000,
+               .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 */
+       {
+               .tADL_min = 100000,
+               .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 */
+       {
+               .tADL_min = 100000,
+               .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 */
+       {
+               .tADL_min = 70000,
+               .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 */
+       {
+               .tADL_min = 70000,
+               .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,
+       },
+};
+
+/**
+ * onfi_async_timing_mode_to_sdr_timings - [NAND Interface] Retrieve NAND
+ * timings according to the given ONFI timing mode
+ * @mode: ONFI timing mode
+ */
+const struct nand_sdr_timings *onfi_async_timing_mode_to_sdr_timings(int mode)
+{
+       if (mode < 0 || mode >= ARRAY_SIZE(onfi_sdr_timings))
+               return ERR_PTR(-EINVAL);
+
+       return &onfi_sdr_timings[mode];
+}
+EXPORT_SYMBOL(onfi_async_timing_mode_to_sdr_timings);

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index cdda207c16e15e05c130b6f056f660605d0e99f0..3083c53e027049196f8f18561cd1d13f51b72a07 100644 (file)
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -997,4 +997,7 @@ struct nand_sdr_timings {
        u32 tWP_min;
        u32 tWW_min;
 };
+
+/* get timing characteristics from ONFI timing mode. */
+const struct nand_sdr_timings *onfi_async_timing_mode_to_sdr_timings(int mode);
 #endif /* __LINUX_MTD_NAND_H */