Merge tag 'mtd/for-4.19' of git://git.infradead.org/linux-mtd

Pull mtd updates from Boris Brezillon:
 "JFFS2 changes:
   - Support 64-bit timestamps

  MTD core changes:
   - Support sub-partitions
   - Clarify mtd_oob_ops documentation
   - Make Kconfig formatting consistent
   - Fix potential overflows in mtdchar_{write,read}()
   - Fallback to ->_{read,write}() when ->_{read,write}_oob() is missing
     and no OOB data were requested
   - Remove VLA usage in the bch lib

  MTD driver changes:
   - Use mtd_device_register() instead of mtd_device_parse_register()
     where applicable
   - Use proper printk format to print physical addresses in the
     solutionengine driver
   - Add missing mtd_set_of_node() call in the powernv driver
   - Remove unneeded variables in a few drivers
   - Plug the TRX part parser to the DT partition parsers logic
   - Check ioremap_cache() return code in the gpio-addr-flash driver
   - Stop using VMLINUX_SYMBOL_STR() in gen_probe.c

  SPI NOR core changes:
   - Apply reset hacks only when reset is explicitly marked as broken in
     the DT

   SPI NOR driver changes:
   - Minor cleanup/fixes in the m25p80 driver
   - Release flash_np in the nxp-spifi driver
   - Add suspend/resume hooks to the atmel-quadspi driver
   - Include gpio/consumer.h instead of gpio.h in the atmel-quadspi
     driver
   - Use %pK instead of %p in the stm32-quadspi driver
   - Improve timeout handling in the cadence-quadspi driver
   - Use mtd_device_register() instead of mtd_device_parse_register() in
     the intel-spi driver

  NAND core changes:
   - Add the SPI-NAND framework.
   - Create a helper to find the best ECC configuration.
   - Create NAND controller operations.
   - Allocate dynamically ONFI parameters structure.
   - Add defines for ONFI version bits.
   - Add manufacturer fixup for ONFI parameter page.
   - Add an option to specify NAND chip as a boot device.
   - Add Reed-Solomon error correction algorithm.
   - Better name for the controller structure.
   - Remove unused caller_is_module() definition.
   - Make subop helpers return unsigned values.
   - Expose _notsupp() helpers for raw page accessors.
   - Add default values for dynamic timings.
   - Kill the chip->scan_bbt() hook.
   - Rename nand_default_bbt() into nand_create_bbt().
   - Start to clean the nand_chip structure.
   - Remove stale prototype from rawnand.h.

  Raw NAND controllers drivers changes:
   - Qcom: structuring cleanup.
   - Denali: use core helper to find the best ECC configuration.
   - Possible build of almost all drivers by adding a dependency on
     COMPILE_TEST for almost all of them in Kconfig, implies various
     fixes, Kconfig cleanup, GPIO headers inclusion cleanup, and even
     changes in sparc64 and ia64 architectures.
   - Clean the ->probe() functions error path of a lot of drivers.
   - Migrate all drivers to use nand_scan() instead of
     nand_scan_ident()/nand_scan_tail() pair.
   - Use mtd_device_register() where applicable to simplify the code.
   - Marvell:
      * Handle on-die ECC.
      * Better clocks handling.
      * Remove bogus comment.
      * Add suspend and resume support.
   - Tegra: add NAND controller driver.
   - Atmel:
      * Add module param to avoid using dma.
      * Drop Wenyou Yang from MAINTAINERS.
   - Denali: optimize timings handling.
   - FSMC: Stop using chip->read_buf().
   - FSL:
      * Switch to SPDX license tag identifiers.
      * Fix qualifiers in MXC init functions.

  Raw NAND chip drivers changes:
   - Micron:
      * Add fixup for ONFI revision.
      * Update ecc_stats.corrected.
      * Make ECC activation stateful.
      * Avoid enabling/disabling ECC when it can't be disabled.
      * Get the actual number of bitflips.
      * Allow forced on-die ECC.
      * Support 8/512 on-die ECC.
      * Fix on-die ECC detection logic.
   - Hynix:
      * Fix decoding the OOB size on H27UCG8T2BTR.
      * Use ->exec_op() in hynix_nand_reg_write_op()"

* tag 'mtd/for-4.19' of git://git.infradead.org/linux-mtd: (188 commits)
  mtd: rawnand: atmel: Select GENERIC_ALLOCATOR
  MAINTAINERS: drop Wenyou Yang from Atmel NAND driver support
  mtd: rawnand: allocate dynamically ONFI parameters during detection
  mtd: spi-nor: only apply reset hacks to broken hardware
  mtd: spi-nor: cadence-quadspi: fix timeout handling
  mtd: spi-nor: atmel-quadspi: Include gpio/consumer.h instead of gpio.h
  mtd: spi-nor: intel-spi: use mtd_device_register()
  mtd: spi-nor: stm32-quadspi: replace "%p" with "%pK"
  mtd: spi-nor: atmel-quadspi: add suspend/resume hooks
  mtd: rawnand: allocate model parameter dynamically
  mtd: rawnand: do not export nand_scan_[ident|tail]() anymore
  mtd: rawnand: txx9ndfmc: convert driver to nand_scan()
  mtd: rawnand: txx9ndfmc: clarify ECC parameters assignation
  mtd: rawnand: tegra: convert driver to nand_scan()
  mtd: rawnand: jz4740: convert driver to nand_scan()
  mtd: rawnand: jz4740: group nand_scan_{ident, tail} calls
  mtd: rawnand: jz4740: fix probe function error path
  mtd: rawnand: docg4: convert driver to nand_scan()
  mtd: rawnand: do not execute nand_scan_ident() if maxchips is zero
  mtd: rawnand: atmel: convert driver to nand_scan()
  ...

1 files changed, 144 insertions, 0 deletions

diff --git a/drivers/mtd/nand/spi/macronix.c b/drivers/mtd/nand/spi/macronix.c
new file mode 100644
index 000000000000..98f6b9c4b684
--- /dev/null
+++ b/drivers/mtd/nand/spi/macronix.c
@@ -0,0 +1,144 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018 Macronix
+ *
+ * Author: Boris Brezillon <boris.brezillon@bootlin.com>
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/mtd/spinand.h>
+
+#define SPINAND_MFR_MACRONIX		0xC2
+
+static SPINAND_OP_VARIANTS(read_cache_variants,
+		SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
+		SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
+		SPINAND_PAGE_READ_FROM_CACHE_OP(true, 0, 1, NULL, 0),
+		SPINAND_PAGE_READ_FROM_CACHE_OP(false, 0, 1, NULL, 0));
+
+static SPINAND_OP_VARIANTS(write_cache_variants,
+		SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
+		SPINAND_PROG_LOAD(true, 0, NULL, 0));
+
+static SPINAND_OP_VARIANTS(update_cache_variants,
+		SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
+		SPINAND_PROG_LOAD(false, 0, NULL, 0));
+
+static int mx35lfxge4ab_ooblayout_ecc(struct mtd_info *mtd, int section,
+				      struct mtd_oob_region *region)
+{
+	return -ERANGE;
+}
+
+static int mx35lfxge4ab_ooblayout_free(struct mtd_info *mtd, int section,
+				       struct mtd_oob_region *region)
+{
+	if (section)
+		return -ERANGE;
+
+	region->offset = 2;
+	region->length = mtd->oobsize - 2;
+
+	return 0;
+}
+
+static const struct mtd_ooblayout_ops mx35lfxge4ab_ooblayout = {
+	.ecc = mx35lfxge4ab_ooblayout_ecc,
+	.free = mx35lfxge4ab_ooblayout_free,
+};
+
+static int mx35lf1ge4ab_get_eccsr(struct spinand_device *spinand, u8 *eccsr)
+{
+	struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(0x7c, 1),
+					  SPI_MEM_OP_NO_ADDR,
+					  SPI_MEM_OP_DUMMY(1, 1),
+					  SPI_MEM_OP_DATA_IN(1, eccsr, 1));
+
+	return spi_mem_exec_op(spinand->spimem, &op);
+}
+
+static int mx35lf1ge4ab_ecc_get_status(struct spinand_device *spinand,
+				       u8 status)
+{
+	struct nand_device *nand = spinand_to_nand(spinand);
+	u8 eccsr;
+
+	switch (status & STATUS_ECC_MASK) {
+	case STATUS_ECC_NO_BITFLIPS:
+		return 0;
+
+	case STATUS_ECC_UNCOR_ERROR:
+		return -EBADMSG;
+
+	case STATUS_ECC_HAS_BITFLIPS:
+		/*
+		 * Let's try to retrieve the real maximum number of bitflips
+		 * in order to avoid forcing the wear-leveling layer to move
+		 * data around if it's not necessary.
+		 */
+		if (mx35lf1ge4ab_get_eccsr(spinand, &eccsr))
+			return nand->eccreq.strength;
+
+		if (WARN_ON(eccsr > nand->eccreq.strength || !eccsr))
+			return nand->eccreq.strength;
+
+		return eccsr;
+
+	default:
+		break;
+	}
+
+	return -EINVAL;
+}
+
+static const struct spinand_info macronix_spinand_table[] = {
+	SPINAND_INFO("MX35LF1GE4AB", 0x12,
+		     NAND_MEMORG(1, 2048, 64, 64, 1024, 1, 1, 1),
+		     NAND_ECCREQ(4, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     SPINAND_HAS_QE_BIT,
+		     SPINAND_ECCINFO(&mx35lfxge4ab_ooblayout,
+				     mx35lf1ge4ab_ecc_get_status)),
+	SPINAND_INFO("MX35LF2GE4AB", 0x22,
+		     NAND_MEMORG(1, 2048, 64, 64, 2048, 2, 1, 1),
+		     NAND_ECCREQ(4, 512),
+		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
+					      &write_cache_variants,
+					      &update_cache_variants),
+		     SPINAND_HAS_QE_BIT,
+		     SPINAND_ECCINFO(&mx35lfxge4ab_ooblayout, NULL)),
+};
+
+static int macronix_spinand_detect(struct spinand_device *spinand)
+{
+	u8 *id = spinand->id.data;
+	int ret;
+
+	/*
+	 * Macronix SPI NAND read ID needs a dummy byte, so the first byte in
+	 * raw_id is garbage.
+	 */
+	if (id[1] != SPINAND_MFR_MACRONIX)
+		return 0;
+
+	ret = spinand_match_and_init(spinand, macronix_spinand_table,
+				     ARRAY_SIZE(macronix_spinand_table),
+				     id[2]);
+	if (ret)
+		return ret;
+
+	return 1;
+}
+
+static const struct spinand_manufacturer_ops macronix_spinand_manuf_ops = {
+	.detect = macronix_spinand_detect,
+};
+
+const struct spinand_manufacturer macronix_spinand_manufacturer = {
+	.id = SPINAND_MFR_MACRONIX,
+	.name = "Macronix",
+	.ops = &macronix_spinand_manuf_ops,
+};