Merge tag 'nand/for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux into mtd/next

NAND core changes:
- use longest matching pattern in ->exec_op() default parser
- export NAND operation tracer
- add flag to indicate panic_write in MTD
- use kzalloc() instead of kmalloc() and memset()

Raw NAND controller drivers changes:
- brcmnand:
  * fix BCH ECC layout for large page NAND parts
  * fallback to detected ecc-strength, ecc-step-size
  * when oops in progress use pio and interrupt polling
  * code refactor code to introduce helper functions
  * add support for v7.3 controller
- FSMC:
  * use nand_op_trace for operation tracing
- GPMI:
  * move all driver code into single file
  * various cleanups (including dmaengine changes)
  * use runtime PM to manage clocks
  * implement exec_op
- MTK:
  * correct low level time calculation of r/w cycle
  * improve data sampling timing for read cycle
  * add validity check for CE# pin setting
  * fix wrongly assigned OOB buffer pointer issue
  * re-license MTK NAND driver as Dual MIT/GPL
- STM32:
  * manage the get_irq error case
  * increase DMA completion timeouts

Raw NAND chips drivers changes:
- Macronix: add read-retry support

Onenand driver changes:
- add support for 8Gb datasize chips
- avoid fall-through warnings

SPI-NAND changes:
- define macros for page-read ops with three-byte addresses
- add support for two-byte device IDs and then for GigaDevice
  GD5F1GQ4UFxxG
- add initial support for Paragon PN26G0xA
- handle the case where the last page read has bitflips

1 files changed, 46 insertions, 10 deletions

diff --git a/drivers/mtd/nand/raw/nand_macronix.c b/drivers/mtd/nand/raw/nand_macronix.c
index e287e71347c5..58511aeb0c9a 100644
--- a/drivers/mtd/nand/raw/nand_macronix.c
+++ b/drivers/mtd/nand/raw/nand_macronix.c
@@ -1,22 +1,57 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Copyright (C) 2017 Free Electrons
  * Copyright (C) 2017 NextThing Co
  *
  * 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 as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include "internals.h"
 
+#define MACRONIX_READ_RETRY_BIT BIT(0)
+#define MACRONIX_NUM_READ_RETRY_MODES 6
+
+struct nand_onfi_vendor_macronix {
+	u8 reserved;
+	u8 reliability_func;
+} __packed;
+
+static int macronix_nand_setup_read_retry(struct nand_chip *chip, int mode)
+{
+	u8 feature[ONFI_SUBFEATURE_PARAM_LEN];
+
+	if (!chip->parameters.supports_set_get_features ||
+	    !test_bit(ONFI_FEATURE_ADDR_READ_RETRY,
+		      chip->parameters.set_feature_list))
+		return -ENOTSUPP;
+
+	feature[0] = mode;
+	return nand_set_features(chip, ONFI_FEATURE_ADDR_READ_RETRY, feature);
+}
+
+static void macronix_nand_onfi_init(struct nand_chip *chip)
+{
+	struct nand_parameters *p = &chip->parameters;
+	struct nand_onfi_vendor_macronix *mxic;
+
+	if (!p->onfi)
+		return;
+
+	mxic = (struct nand_onfi_vendor_macronix *)p->onfi->vendor;
+	if ((mxic->reliability_func & MACRONIX_READ_RETRY_BIT) == 0)
+		return;
+
+	chip->read_retries = MACRONIX_NUM_READ_RETRY_MODES;
+	chip->setup_read_retry = macronix_nand_setup_read_retry;
+
+	if (p->supports_set_get_features) {
+		bitmap_set(p->set_feature_list,
+			   ONFI_FEATURE_ADDR_READ_RETRY, 1);
+		bitmap_set(p->get_feature_list,
+			   ONFI_FEATURE_ADDR_READ_RETRY, 1);
+	}
+}
+
 /*
  * Macronix AC series does not support using SET/GET_FEATURES to change
  * the timings unlike what is declared in the parameter page. Unflag
@@ -65,6 +100,7 @@ static int macronix_nand_init(struct nand_chip *chip)
 		chip->options |= NAND_BBM_FIRSTPAGE | NAND_BBM_SECONDPAGE;
 
 	macronix_nand_fix_broken_get_timings(chip);
+	macronix_nand_onfi_init(chip);
 
 	return 0;
 }