GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/drivers/mtd/spi/Kconfig

@@ -0,0 +1,207 @@
+menu "SPI Flash Support"
+
+config DM_SPI_FLASH
+	bool "Enable Driver Model for SPI flash"
+	depends on DM && DM_SPI
+	imply SPI_FLASH
+	help
+	  Enable driver model for SPI flash. This SPI flash interface
+	  (spi_flash_probe(), spi_flash_write(), etc.) is then
+	  implemented by the SPI flash uclass. There is one standard
+	  SPI flash driver which knows how to probe most chips
+	  supported by U-Boot. The uclass interface is defined in
+	  include/spi_flash.h, but is currently fully compatible
+	  with the old interface to avoid confusion and duplication
+	  during the transition parent. SPI and SPI flash must be
+	  enabled together (it is not possible to use driver model
+	  for one and not the other).
+
+config SPI_FLASH_SANDBOX
+	bool "Support sandbox SPI flash device"
+	depends on SANDBOX && DM_SPI_FLASH
+	help
+	  Since sandbox cannot access real devices, an emulation mechanism is
+	  provided instead. Drivers can be connected up to the sandbox SPI
+	  bus (see CONFIG_SANDBOX_SPI) and SPI traffic will be routed to this
+	  device. Typically the contents of the emulated SPI flash device is
+	  stored in a file on the host filesystem.
+
+config SPI_FLASH
+	bool "SPI Flash Core Interface support"
+	select SPI_MEM
+	help
+	  Enable the SPI flash Core support. This will include basic
+	  standard support for things like probing, read / write, and
+	  erasing through cmd_sf interface.
+
+	  If unsure, say N
+
+config SF_DEFAULT_BUS
+	int "SPI Flash default bus identifier"
+	depends on SPI_FLASH || DM_SPI_FLASH
+	default 0
+	help
+	  The default bus may be provided by the platform
+	  to handle the common case when only a single serial
+	  flash is present on the system.
+
+config SF_DEFAULT_CS
+	int "SPI Flash default Chip-select"
+	depends on SPI_FLASH || DM_SPI_FLASH
+	default 0
+	help
+	  The default chip select may be provided by the platform
+	  to handle the common case when only a single serial
+	  flash is present on the system.
+
+config SF_DEFAULT_MODE
+	hex "SPI Flash default mode (see include/spi.h)"
+	depends on SPI_FLASH || DM_SPI_FLASH
+	default 3
+	help
+	  The default mode may be provided by the platform
+	  to handle the common case when only a single serial
+	  flash is present on the system.
+	  Not used for boot with device tree; the SPI driver reads
+	  speed and mode from platdata values computed from
+	  available node.
+
+config SF_DEFAULT_SPEED
+	int "SPI Flash default speed in Hz"
+	depends on SPI_FLASH || DM_SPI_FLASH
+	default 1000000
+	help
+	  The default speed may be provided by the platform
+	  to handle the common case when only a single serial
+	  flash is present on the system.
+	  Not used for boot with device tree; the SPI driver reads
+	  speed and mode from platdata values computed from
+	  available node.
+
+if SPI_FLASH
+
+config SPI_FLASH_SFDP_SUPPORT
+	bool "SFDP table parsing support for SPI NOR flashes"
+	depends on !SPI_FLASH_BAR
+	help
+	 Enable support for parsing and auto discovery of parameters for
+	 SPI NOR flashes using Serial Flash Discoverable Parameters (SFDP)
+	 tables as per JESD216 standard.
+
+config SPI_FLASH_BAR
+	bool "SPI flash Bank/Extended address register support"
+	help
+	  Enable the SPI flash Bank/Extended address register support.
+	  Bank/Extended address registers are used to access the flash
+	  which has size > 16MiB in 3-byte addressing.
+
+config SF_DUAL_FLASH
+	bool "SPI DUAL flash memory support"
+	help
+	  Enable this option to support two flash memories connected to a single
+	  controller. Currently Xilinx Zynq qspi supports this.
+
+config SPI_FLASH_ATMEL
+	bool "Atmel SPI flash support"
+	help
+	  Add support for various Atmel SPI flash chips (AT45xxx and AT25xxx)
+
+config SPI_FLASH_EON
+	bool "EON SPI flash support"
+	help
+	  Add support for various EON SPI flash chips (EN25xxx)
+
+config SPI_FLASH_GIGADEVICE
+	bool "GigaDevice SPI flash support"
+	help
+	  Add support for various GigaDevice SPI flash chips (GD25xxx)
+
+config SPI_FLASH_ISSI
+	bool "ISSI SPI flash support"
+	help
+	  Add support for various ISSI SPI flash chips (ISxxx)
+
+config SPI_FLASH_MACRONIX
+	bool "Macronix SPI flash support"
+	help
+	  Add support for various Macronix SPI flash chips (MX25Lxxx)
+
+config SPI_FLASH_SPANSION
+	bool "Spansion SPI flash support"
+	help
+	  Add support for various Spansion SPI flash chips (S25FLxxx)
+
+config SPI_FLASH_STMICRO
+	bool "STMicro SPI flash support"
+	help
+	  Add support for various STMicro SPI flash chips (M25Pxxx and N25Qxxx)
+
+config SPI_FLASH_SST
+	bool "SST SPI flash support"
+	help
+	  Add support for various SST SPI flash chips (SST25xxx)
+
+config SPI_FLASH_WINBOND
+	bool "Winbond SPI flash support"
+	help
+	  Add support for various Winbond SPI flash chips (W25xxx)
+
+config SPI_FLASH_XMC
+	bool "XMC SPI flash support"
+	help
+	  Add support for various XMC (Wuhan Xinxin Semiconductor
+	  Manufacturing Corp.) SPI flash chips (XM25xxx)
+
+endif
+
+config SPI_FLASH_USE_4K_SECTORS
+	bool "Use small 4096 B erase sectors"
+	depends on SPI_FLASH
+	default y
+	help
+	  Many flash memories support erasing small (4096 B) sectors. Depending
+	  on the usage this feature may provide performance gain in comparison
+	  to erasing whole blocks (32/64 KiB).
+	  Changing a small part of the flash's contents is usually faster with
+	  small sectors. On the other hand erasing should be faster when using
+	  64 KiB block instead of 16 × 4 KiB sectors.
+
+	  Please note that some tools/drivers/filesystems may not work with
+	  4096 B erase size (e.g. UBIFS requires 15 KiB as a minimum).
+
+config SPI_FLASH_DATAFLASH
+	bool "AT45xxx DataFlash support"
+	depends on SPI_FLASH && DM_SPI_FLASH
+	help
+	  Enable the access for SPI-flash-based AT45xxx DataFlash chips.
+	  DataFlash is a kind of SPI flash. Most AT45 chips have two buffers
+	  in each chip, which may be used for double buffered I/O; but this
+	  driver doesn't (yet) use these for any kind of i/o overlap or prefetching.
+
+	  Sometimes DataFlash is packaged in MMC-format cards, although the
+	  MMC stack can't (yet?) distinguish between MMC and DataFlash
+	  protocols during enumeration.
+
+	  If unsure, say N
+
+config SPI_FLASH_MTD
+	bool "SPI Flash MTD support"
+	depends on SPI_FLASH && MTD
+	help
+          Enable the MTD support for spi flash layer, this adapter is for
+	  translating mtd_read/mtd_write commands into spi_flash_read/write
+	  commands. It is not intended to use it within sf_cmd or the SPI
+	  flash subsystem. Such an adapter is needed for subsystems like
+	  UBI which can only operate on top of the MTD layer.
+
+	  If unsure, say N
+
+config SPL_SPI_FLASH_MTD
+	bool "SPI flash MTD support for SPL"
+	depends on SPI_FLASH
+	help
+          Enable the MTD support for the SPI flash layer in SPL.
+
+	  If unsure, say N
+
+endmenu # menu "SPI Flash Support"

source/bootloader/u-boot-2020.01/drivers/mtd/spi/Makefile

@@ -0,0 +1,23 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+
+obj-$(CONFIG_DM_SPI_FLASH) += sf-uclass.o
+spi-nor-y := sf_probe.o spi-nor-ids.o
+
+ifdef CONFIG_SPL_BUILD
+obj-$(CONFIG_SPL_SPI_BOOT)	+= fsl_espi_spl.o
+ifeq ($(CONFIG_SPL_SPI_FLASH_TINY),y)
+spi-nor-y += spi-nor-tiny.o
+else
+spi-nor-y += spi-nor-core.o
+endif
+else
+spi-nor-y += spi-nor-core.o
+endif
+
+obj-$(CONFIG_SPI_FLASH) += spi-nor.o
+obj-$(CONFIG_SPI_FLASH_DATAFLASH) += sf_dataflash.o
+obj-$(CONFIG_$(SPL_)SPI_FLASH_MTD) += sf_mtd.o
+obj-$(CONFIG_SPI_FLASH_SANDBOX) += sandbox.o

source/bootloader/u-boot-2020.01/drivers/mtd/spi/fsl_espi_spl.c

@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2013 Freescale Semiconductor, Inc.
+ */
+
+#include <common.h>
+#include <cpu_func.h>
+#include <spi_flash.h>
+#include <malloc.h>
+
+#define ESPI_BOOT_IMAGE_SIZE	0x48
+#define ESPI_BOOT_IMAGE_ADDR	0x50
+#define CONFIG_CFG_DATA_SECTOR	0
+
+void fsl_spi_spl_load_image(uint32_t offs, unsigned int size, void *vdst)
+{
+	struct spi_flash *flash;
+
+	flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
+			CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
+	if (flash == NULL) {
+		puts("\nspi_flash_probe failed");
+		hang();
+	}
+
+	spi_flash_read(flash, offs, size, vdst);
+}
+
+/*
+ * The main entry for SPI booting. It's necessary that SDRAM is already
+ * configured and available since this code loads the main U-Boot image
+ * from SPI into SDRAM and starts it from there.
+ */
+void fsl_spi_boot(void)
+{
+	void (*uboot)(void) __noreturn;
+	u32 offset, code_len, copy_len = 0;
+#ifndef CONFIG_FSL_CORENET
+	unsigned char *buf = NULL;
+#endif
+	struct spi_flash *flash;
+
+	flash = spi_flash_probe(CONFIG_ENV_SPI_BUS, CONFIG_ENV_SPI_CS,
+			CONFIG_ENV_SPI_MAX_HZ, CONFIG_ENV_SPI_MODE);
+	if (flash == NULL) {
+		puts("\nspi_flash_probe failed");
+		hang();
+	}
+
+#ifdef CONFIG_FSL_CORENET
+	offset = CONFIG_SYS_SPI_FLASH_U_BOOT_OFFS;
+	code_len = CONFIG_SYS_SPI_FLASH_U_BOOT_SIZE;
+#else
+	/*
+	* Load U-Boot image from SPI flash into RAM
+	*/
+	buf = malloc(flash->page_size);
+	if (buf == NULL) {
+		puts("\nmalloc failed");
+		hang();
+	}
+	memset(buf, 0, flash->page_size);
+
+	spi_flash_read(flash, CONFIG_CFG_DATA_SECTOR,
+		       flash->page_size, (void *)buf);
+	offset = *(u32 *)(buf + ESPI_BOOT_IMAGE_ADDR);
+	/* Skip spl code */
+	offset += CONFIG_SYS_SPI_FLASH_U_BOOT_OFFS;
+	/* Get the code size from offset 0x48 */
+	code_len = *(u32 *)(buf + ESPI_BOOT_IMAGE_SIZE);
+	/* Skip spl code */
+	code_len = code_len - CONFIG_SPL_MAX_SIZE;
+#endif
+	/* copy code to DDR */
+	printf("Loading second stage boot loader ");
+	while (copy_len <= code_len) {
+		spi_flash_read(flash, offset + copy_len, 0x2000,
+			       (void *)(CONFIG_SYS_SPI_FLASH_U_BOOT_DST
+			       + copy_len));
+		copy_len = copy_len + 0x2000;
+		putc('.');
+	}
+
+	/*
+	* Jump to U-Boot image
+	*/
+	flush_cache(CONFIG_SYS_SPI_FLASH_U_BOOT_DST, code_len);
+	uboot = (void *)CONFIG_SYS_SPI_FLASH_U_BOOT_START;
+	(*uboot)();
+}

source/bootloader/u-boot-2020.01/drivers/mtd/spi/sandbox.c

@@ -0,0 +1,607 @@
+/*
+ * Simulate a SPI flash
+ *
+ * Copyright (c) 2011-2013 The Chromium OS Authors.
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#define LOG_CATEGORY UCLASS_SPI_FLASH
+
+#include <common.h>
+#include <dm.h>
+#include <malloc.h>
+#include <spi.h>
+#include <os.h>
+
+#include <spi_flash.h>
+#include "sf_internal.h"
+
+#include <asm/getopt.h>
+#include <asm/spi.h>
+#include <asm/state.h>
+#include <dm/device-internal.h>
+#include <dm/lists.h>
+#include <dm/uclass-internal.h>
+
+/*
+ * The different states that our SPI flash transitions between.
+ * We need to keep track of this across multiple xfer calls since
+ * the SPI bus could possibly call down into us multiple times.
+ */
+enum sandbox_sf_state {
+	SF_CMD,   /* default state -- we're awaiting a command */
+	SF_ID,    /* read the flash's (jedec) ID code */
+	SF_ADDR,  /* processing the offset in the flash to read/etc... */
+	SF_READ,  /* reading data from the flash */
+	SF_WRITE, /* writing data to the flash, i.e. page programming */
+	SF_ERASE, /* erase the flash */
+	SF_READ_STATUS, /* read the flash's status register */
+	SF_READ_STATUS1, /* read the flash's status register upper 8 bits*/
+	SF_WRITE_STATUS, /* write the flash's status register */
+};
+
+#if CONFIG_IS_ENABLED(LOG)
+static const char *sandbox_sf_state_name(enum sandbox_sf_state state)
+{
+	static const char * const states[] = {
+		"CMD", "ID", "ADDR", "READ", "WRITE", "ERASE", "READ_STATUS",
+		"READ_STATUS1", "WRITE_STATUS",
+	};
+	return states[state];
+}
+#endif /* LOG */
+
+/* Bits for the status register */
+#define STAT_WIP	(1 << 0)
+#define STAT_WEL	(1 << 1)
+#define STAT_BP_SHIFT	2
+#define STAT_BP_MASK	(7 << STAT_BP_SHIFT)
+
+/* Assume all SPI flashes have 3 byte addresses since they do atm */
+#define SF_ADDR_LEN	3
+
+#define IDCODE_LEN 3
+
+/* Used to quickly bulk erase backing store */
+static u8 sandbox_sf_0xff[0x1000];
+
+/* Internal state data for each SPI flash */
+struct sandbox_spi_flash {
+	unsigned int cs;	/* Chip select we are attached to */
+	/*
+	 * As we receive data over the SPI bus, our flash transitions
+	 * between states.  For example, we start off in the SF_CMD
+	 * state where the first byte tells us what operation to perform
+	 * (such as read or write the flash).  But the operation itself
+	 * can go through a few states such as first reading in the
+	 * offset in the flash to perform the requested operation.
+	 * Thus "state" stores the exact state that our machine is in
+	 * while "cmd" stores the overall command we're processing.
+	 */
+	enum sandbox_sf_state state;
+	uint cmd;
+	/* Erase size of current erase command */
+	uint erase_size;
+	/* Current position in the flash; used when reading/writing/etc... */
+	uint off;
+	/* How many address bytes we've consumed */
+	uint addr_bytes, pad_addr_bytes;
+	/* The current flash status (see STAT_XXX defines above) */
+	u16 status;
+	/* Data describing the flash we're emulating */
+	const struct flash_info *data;
+	/* The file on disk to serv up data from */
+	int fd;
+};
+
+struct sandbox_spi_flash_plat_data {
+	const char *filename;
+	const char *device_name;
+	int bus;
+	int cs;
+};
+
+void sandbox_sf_set_block_protect(struct udevice *dev, int bp_mask)
+{
+	struct sandbox_spi_flash *sbsf = dev_get_priv(dev);
+
+	sbsf->status &= ~STAT_BP_MASK;
+	sbsf->status |= bp_mask << STAT_BP_SHIFT;
+}
+
+/**
+ * This is a very strange probe function. If it has platform data (which may
+ * have come from the device tree) then this function gets the filename and
+ * device type from there.
+ */
+static int sandbox_sf_probe(struct udevice *dev)
+{
+	/* spec = idcode:file */
+	struct sandbox_spi_flash *sbsf = dev_get_priv(dev);
+	size_t len, idname_len;
+	const struct flash_info *data;
+	struct sandbox_spi_flash_plat_data *pdata = dev_get_platdata(dev);
+	struct sandbox_state *state = state_get_current();
+	struct dm_spi_slave_platdata *slave_plat;
+	struct udevice *bus = dev->parent;
+	const char *spec = NULL;
+	struct udevice *emul;
+	int ret = 0;
+	int cs = -1;
+
+	debug("%s: bus %d, looking for emul=%p: ", __func__, bus->seq, dev);
+	ret = sandbox_spi_get_emul(state, bus, dev, &emul);
+	if (ret) {
+		printf("Error: Unknown chip select for device '%s'\n",
+			dev->name);
+		return ret;
+	}
+	slave_plat = dev_get_parent_platdata(dev);
+	cs = slave_plat->cs;
+	debug("found at cs %d\n", cs);
+
+	if (!pdata->filename) {
+		printf("Error: No filename available\n");
+		return -EINVAL;
+	}
+	spec = strchr(pdata->device_name, ',');
+	if (spec)
+		spec++;
+	else
+		spec = pdata->device_name;
+	idname_len = strlen(spec);
+	debug("%s: device='%s'\n", __func__, spec);
+
+	for (data = spi_nor_ids; data->name; data++) {
+		len = strlen(data->name);
+		if (idname_len != len)
+			continue;
+		if (!strncasecmp(spec, data->name, len))
+			break;
+	}
+	if (!data->name) {
+		printf("%s: unknown flash '%*s'\n", __func__, (int)idname_len,
+		       spec);
+		ret = -EINVAL;
+		goto error;
+	}
+
+	if (sandbox_sf_0xff[0] == 0x00)
+		memset(sandbox_sf_0xff, 0xff, sizeof(sandbox_sf_0xff));
+
+	sbsf->fd = os_open(pdata->filename, 02);
+	if (sbsf->fd == -1) {
+		printf("%s: unable to open file '%s'\n", __func__,
+		       pdata->filename);
+		ret = -EIO;
+		goto error;
+	}
+
+	sbsf->data = data;
+	sbsf->cs = cs;
+
+	return 0;
+
+ error:
+	debug("%s: Got error %d\n", __func__, ret);
+	return ret;
+}
+
+static int sandbox_sf_remove(struct udevice *dev)
+{
+	struct sandbox_spi_flash *sbsf = dev_get_priv(dev);
+
+	os_close(sbsf->fd);
+
+	return 0;
+}
+
+static void sandbox_sf_cs_activate(struct udevice *dev)
+{
+	struct sandbox_spi_flash *sbsf = dev_get_priv(dev);
+
+	log_content("sandbox_sf: CS activated; state is fresh!\n");
+
+	/* CS is asserted, so reset state */
+	sbsf->off = 0;
+	sbsf->addr_bytes = 0;
+	sbsf->pad_addr_bytes = 0;
+	sbsf->state = SF_CMD;
+	sbsf->cmd = SF_CMD;
+}
+
+static void sandbox_sf_cs_deactivate(struct udevice *dev)
+{
+	log_content("sandbox_sf: CS deactivated; cmd done processing!\n");
+}
+
+/*
+ * There are times when the data lines are allowed to tristate.  What
+ * is actually sensed on the line depends on the hardware.  It could
+ * always be 0xFF/0x00 (if there are pull ups/downs), or things could
+ * float and so we'd get garbage back.  This func encapsulates that
+ * scenario so we can worry about the details here.
+ */
+static void sandbox_spi_tristate(u8 *buf, uint len)
+{
+	/* XXX: make this into a user config option ? */
+	memset(buf, 0xff, len);
+}
+
+/* Figure out what command this stream is telling us to do */
+static int sandbox_sf_process_cmd(struct sandbox_spi_flash *sbsf, const u8 *rx,
+				  u8 *tx)
+{
+	enum sandbox_sf_state oldstate = sbsf->state;
+
+	/* We need to output a byte for the cmd byte we just ate */
+	if (tx)
+		sandbox_spi_tristate(tx, 1);
+
+	sbsf->cmd = rx[0];
+	switch (sbsf->cmd) {
+	case SPINOR_OP_RDID:
+		sbsf->state = SF_ID;
+		sbsf->cmd = SF_ID;
+		break;
+	case SPINOR_OP_READ_FAST:
+		sbsf->pad_addr_bytes = 1;
+	case SPINOR_OP_READ:
+	case SPINOR_OP_PP:
+		sbsf->state = SF_ADDR;
+		break;
+	case SPINOR_OP_WRDI:
+		debug(" write disabled\n");
+		sbsf->status &= ~STAT_WEL;
+		break;
+	case SPINOR_OP_RDSR:
+		sbsf->state = SF_READ_STATUS;
+		break;
+	case SPINOR_OP_RDSR2:
+		sbsf->state = SF_READ_STATUS1;
+		break;
+	case SPINOR_OP_WREN:
+		debug(" write enabled\n");
+		sbsf->status |= STAT_WEL;
+		break;
+	case SPINOR_OP_WRSR:
+		sbsf->state = SF_WRITE_STATUS;
+		break;
+	default: {
+		int flags = sbsf->data->flags;
+
+		/* we only support erase here */
+		if (sbsf->cmd == SPINOR_OP_CHIP_ERASE) {
+			sbsf->erase_size = sbsf->data->sector_size *
+				sbsf->data->n_sectors;
+		} else if (sbsf->cmd == SPINOR_OP_BE_4K && (flags & SECT_4K)) {
+			sbsf->erase_size = 4 << 10;
+		} else if (sbsf->cmd == SPINOR_OP_SE && !(flags & SECT_4K)) {
+			sbsf->erase_size = 64 << 10;
+		} else {
+			debug(" cmd unknown: %#x\n", sbsf->cmd);
+			return -EIO;
+		}
+		sbsf->state = SF_ADDR;
+		break;
+	}
+	}
+
+	if (oldstate != sbsf->state)
+		log_content(" cmd: transition to %s state\n",
+			    sandbox_sf_state_name(sbsf->state));
+
+	return 0;
+}
+
+int sandbox_erase_part(struct sandbox_spi_flash *sbsf, int size)
+{
+	int todo;
+	int ret;
+
+	while (size > 0) {
+		todo = min(size, (int)sizeof(sandbox_sf_0xff));
+		ret = os_write(sbsf->fd, sandbox_sf_0xff, todo);
+		if (ret != todo)
+			return ret;
+		size -= todo;
+	}
+
+	return 0;
+}
+
+static int sandbox_sf_xfer(struct udevice *dev, unsigned int bitlen,
+			   const void *rxp, void *txp, unsigned long flags)
+{
+	struct sandbox_spi_flash *sbsf = dev_get_priv(dev);
+	const uint8_t *rx = rxp;
+	uint8_t *tx = txp;
+	uint cnt, pos = 0;
+	int bytes = bitlen / 8;
+	int ret;
+
+	log_content("sandbox_sf: state:%x(%s) bytes:%u\n", sbsf->state,
+		    sandbox_sf_state_name(sbsf->state), bytes);
+
+	if ((flags & SPI_XFER_BEGIN))
+		sandbox_sf_cs_activate(dev);
+
+	if (sbsf->state == SF_CMD) {
+		/* Figure out the initial state */
+		ret = sandbox_sf_process_cmd(sbsf, rx, tx);
+		if (ret)
+			return ret;
+		++pos;
+	}
+
+	/* Process the remaining data */
+	while (pos < bytes) {
+		switch (sbsf->state) {
+		case SF_ID: {
+			u8 id;
+
+			log_content(" id: off:%u tx:", sbsf->off);
+			if (sbsf->off < IDCODE_LEN) {
+				/* Extract correct byte from ID 0x00aabbcc */
+				id = ((JEDEC_MFR(sbsf->data) << 16) |
+					JEDEC_ID(sbsf->data)) >>
+					(8 * (IDCODE_LEN - 1 - sbsf->off));
+			} else {
+				id = 0;
+			}
+			log_content("%d %02x\n", sbsf->off, id);
+			tx[pos++] = id;
+			++sbsf->off;
+			break;
+		}
+		case SF_ADDR:
+			log_content(" addr: bytes:%u rx:%02x ",
+				    sbsf->addr_bytes, rx[pos]);
+
+			if (sbsf->addr_bytes++ < SF_ADDR_LEN)
+				sbsf->off = (sbsf->off << 8) | rx[pos];
+			log_content("addr:%06x\n", sbsf->off);
+
+			if (tx)
+				sandbox_spi_tristate(&tx[pos], 1);
+			pos++;
+
+			/* See if we're done processing */
+			if (sbsf->addr_bytes <
+					SF_ADDR_LEN + sbsf->pad_addr_bytes)
+				break;
+
+			/* Next state! */
+			if (os_lseek(sbsf->fd, sbsf->off, OS_SEEK_SET) < 0) {
+				puts("sandbox_sf: os_lseek() failed");
+				return -EIO;
+			}
+			switch (sbsf->cmd) {
+			case SPINOR_OP_READ_FAST:
+			case SPINOR_OP_READ:
+				sbsf->state = SF_READ;
+				break;
+			case SPINOR_OP_PP:
+				sbsf->state = SF_WRITE;
+				break;
+			default:
+				/* assume erase state ... */
+				sbsf->state = SF_ERASE;
+				goto case_sf_erase;
+			}
+			log_content(" cmd: transition to %s state\n",
+				    sandbox_sf_state_name(sbsf->state));
+			break;
+		case SF_READ:
+			/*
+			 * XXX: need to handle exotic behavior:
+			 *      - reading past end of device
+			 */
+
+			cnt = bytes - pos;
+			log_content(" tx: read(%u)\n", cnt);
+			assert(tx);
+			ret = os_read(sbsf->fd, tx + pos, cnt);
+			if (ret < 0) {
+				puts("sandbox_sf: os_read() failed\n");
+				return -EIO;
+			}
+			pos += ret;
+			break;
+		case SF_READ_STATUS:
+			log_content(" read status: %#x\n", sbsf->status);
+			cnt = bytes - pos;
+			memset(tx + pos, sbsf->status, cnt);
+			pos += cnt;
+			break;
+		case SF_READ_STATUS1:
+			log_content(" read status: %#x\n", sbsf->status);
+			cnt = bytes - pos;
+			memset(tx + pos, sbsf->status >> 8, cnt);
+			pos += cnt;
+			break;
+		case SF_WRITE_STATUS:
+			log_content(" write status: %#x (ignored)\n", rx[pos]);
+			pos = bytes;
+			break;
+		case SF_WRITE:
+			/*
+			 * XXX: need to handle exotic behavior:
+			 *      - unaligned addresses
+			 *      - more than a page (256) worth of data
+			 *      - reading past end of device
+			 */
+			if (!(sbsf->status & STAT_WEL)) {
+				puts("sandbox_sf: write enable not set before write\n");
+				goto done;
+			}
+
+			cnt = bytes - pos;
+			log_content(" rx: write(%u)\n", cnt);
+			if (tx)
+				sandbox_spi_tristate(&tx[pos], cnt);
+			ret = os_write(sbsf->fd, rx + pos, cnt);
+			if (ret < 0) {
+				puts("sandbox_spi: os_write() failed\n");
+				return -EIO;
+			}
+			pos += ret;
+			sbsf->status &= ~STAT_WEL;
+			break;
+		case SF_ERASE:
+ case_sf_erase: {
+			if (!(sbsf->status & STAT_WEL)) {
+				puts("sandbox_sf: write enable not set before erase\n");
+				goto done;
+			}
+
+			/* verify address is aligned */
+			if (sbsf->off & (sbsf->erase_size - 1)) {
+				log_content(" sector erase: cmd:%#x needs align:%#x, but we got %#x\n",
+					    sbsf->cmd, sbsf->erase_size,
+					    sbsf->off);
+				sbsf->status &= ~STAT_WEL;
+				goto done;
+			}
+
+			log_content(" sector erase addr: %u, size: %u\n",
+				    sbsf->off, sbsf->erase_size);
+
+			cnt = bytes - pos;
+			if (tx)
+				sandbox_spi_tristate(&tx[pos], cnt);
+			pos += cnt;
+
+			/*
+			 * TODO(vapier@gentoo.org): latch WIP in status, and
+			 * delay before clearing it ?
+			 */
+			ret = sandbox_erase_part(sbsf, sbsf->erase_size);
+			sbsf->status &= ~STAT_WEL;
+			if (ret) {
+				log_content("sandbox_sf: Erase failed\n");
+				goto done;
+			}
+			goto done;
+		}
+		default:
+			log_content(" ??? no idea what to do ???\n");
+			goto done;
+		}
+	}
+
+ done:
+	if (flags & SPI_XFER_END)
+		sandbox_sf_cs_deactivate(dev);
+	return pos == bytes ? 0 : -EIO;
+}
+
+int sandbox_sf_ofdata_to_platdata(struct udevice *dev)
+{
+	struct sandbox_spi_flash_plat_data *pdata = dev_get_platdata(dev);
+
+	pdata->filename = dev_read_string(dev, "sandbox,filename");
+	pdata->device_name = dev_read_string(dev, "compatible");
+	if (!pdata->filename || !pdata->device_name) {
+		debug("%s: Missing properties, filename=%s, device_name=%s\n",
+		      __func__, pdata->filename, pdata->device_name);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static const struct dm_spi_emul_ops sandbox_sf_emul_ops = {
+	.xfer          = sandbox_sf_xfer,
+};
+
+#ifdef CONFIG_SPI_FLASH
+int sandbox_sf_bind_emul(struct sandbox_state *state, int busnum, int cs,
+			 struct udevice *bus, ofnode node, const char *spec)
+{
+	struct udevice *emul;
+	char name[20], *str;
+	struct driver *drv;
+	int ret;
+
+	/* now the emulator */
+	strncpy(name, spec, sizeof(name) - 6);
+	name[sizeof(name) - 6] = '\0';
+	strcat(name, "-emul");
+	drv = lists_driver_lookup_name("sandbox_sf_emul");
+	if (!drv) {
+		puts("Cannot find sandbox_sf_emul driver\n");
+		return -ENOENT;
+	}
+	str = strdup(name);
+	if (!str)
+		return -ENOMEM;
+	ret = device_bind_ofnode(bus, drv, str, NULL, node, &emul);
+	if (ret) {
+		free(str);
+		printf("Cannot create emul device for spec '%s' (err=%d)\n",
+		       spec, ret);
+		return ret;
+	}
+	state->spi[busnum][cs].emul = emul;
+
+	return 0;
+}
+
+void sandbox_sf_unbind_emul(struct sandbox_state *state, int busnum, int cs)
+{
+	struct udevice *dev;
+
+	dev = state->spi[busnum][cs].emul;
+	device_remove(dev, DM_REMOVE_NORMAL);
+	device_unbind(dev);
+	state->spi[busnum][cs].emul = NULL;
+}
+
+int sandbox_spi_get_emul(struct sandbox_state *state,
+			 struct udevice *bus, struct udevice *slave,
+			 struct udevice **emulp)
+{
+	struct sandbox_spi_info *info;
+	int busnum = bus->seq;
+	int cs = spi_chip_select(slave);
+	int ret;
+
+	info = &state->spi[busnum][cs];
+	if (!info->emul) {
+		/* Use the same device tree node as the SPI flash device */
+		debug("%s: busnum=%u, cs=%u: binding SPI flash emulation: ",
+		      __func__, busnum, cs);
+		ret = sandbox_sf_bind_emul(state, busnum, cs, bus,
+					   dev_ofnode(slave), slave->name);
+		if (ret) {
+			debug("failed (err=%d)\n", ret);
+			return ret;
+		}
+		debug("OK\n");
+	}
+	*emulp = info->emul;
+
+	return 0;
+}
+#endif
+
+static const struct udevice_id sandbox_sf_ids[] = {
+	{ .compatible = "sandbox,spi-flash" },
+	{ }
+};
+
+U_BOOT_DRIVER(sandbox_sf_emul) = {
+	.name		= "sandbox_sf_emul",
+	.id		= UCLASS_SPI_EMUL,
+	.of_match	= sandbox_sf_ids,
+	.ofdata_to_platdata = sandbox_sf_ofdata_to_platdata,
+	.probe		= sandbox_sf_probe,
+	.remove		= sandbox_sf_remove,
+	.priv_auto_alloc_size = sizeof(struct sandbox_spi_flash),
+	.platdata_auto_alloc_size = sizeof(struct sandbox_spi_flash_plat_data),
+	.ops		= &sandbox_sf_emul_ops,
+};

source/bootloader/u-boot-2020.01/drivers/mtd/spi/sf-uclass.c

@@ -0,0 +1,111 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2014 Google, Inc
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <spi.h>
+#include <spi_flash.h>
+#include <dm/device-internal.h>
+#include "sf_internal.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+int spi_flash_read_dm(struct udevice *dev, u32 offset, size_t len, void *buf)
+{
+	return log_ret(sf_get_ops(dev)->read(dev, offset, len, buf));
+}
+
+int spi_flash_write_dm(struct udevice *dev, u32 offset, size_t len,
+		       const void *buf)
+{
+	return log_ret(sf_get_ops(dev)->write(dev, offset, len, buf));
+}
+
+int spi_flash_erase_dm(struct udevice *dev, u32 offset, size_t len)
+{
+	return log_ret(sf_get_ops(dev)->erase(dev, offset, len));
+}
+
+int spl_flash_get_sw_write_prot(struct udevice *dev)
+{
+	struct dm_spi_flash_ops *ops = sf_get_ops(dev);
+
+	if (!ops->get_sw_write_prot)
+		return -ENOSYS;
+	return log_ret(ops->get_sw_write_prot(dev));
+}
+
+/*
+ * TODO(sjg@chromium.org): This is an old-style function. We should remove
+ * it when all SPI flash drivers use dm
+ */
+struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
+				  unsigned int max_hz, unsigned int spi_mode)
+{
+	struct udevice *dev;
+
+	if (spi_flash_probe_bus_cs(bus, cs, max_hz, spi_mode, &dev))
+		return NULL;
+
+	return dev_get_uclass_priv(dev);
+}
+
+void spi_flash_free(struct spi_flash *flash)
+{
+	device_remove(flash->spi->dev, DM_REMOVE_NORMAL);
+}
+
+int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
+			   unsigned int max_hz, unsigned int spi_mode,
+			   struct udevice **devp)
+{
+	struct spi_slave *slave;
+	struct udevice *bus;
+	char *str;
+	int ret;
+
+#if defined(CONFIG_SPL_BUILD) && CONFIG_IS_ENABLED(USE_TINY_PRINTF)
+	str = "spi_flash";
+#else
+	char name[30];
+
+	snprintf(name, sizeof(name), "spi_flash@%d:%d", busnum, cs);
+	str = strdup(name);
+#endif
+	ret = spi_get_bus_and_cs(busnum, cs, max_hz, spi_mode,
+				  "spi_flash_std", str, &bus, &slave);
+	if (ret)
+		return ret;
+
+	*devp = slave->dev;
+	return 0;
+}
+
+static int spi_flash_post_bind(struct udevice *dev)
+{
+#if defined(CONFIG_NEEDS_MANUAL_RELOC)
+	struct dm_spi_flash_ops *ops = sf_get_ops(dev);
+	static int reloc_done;
+
+	if (!reloc_done) {
+		if (ops->read)
+			ops->read += gd->reloc_off;
+		if (ops->write)
+			ops->write += gd->reloc_off;
+		if (ops->erase)
+			ops->erase += gd->reloc_off;
+
+		reloc_done++;
+	}
+#endif
+	return 0;
+}
+
+UCLASS_DRIVER(spi_flash) = {
+	.id		= UCLASS_SPI_FLASH,
+	.name		= "spi_flash",
+	.post_bind	= spi_flash_post_bind,
+	.per_device_auto_alloc_size = sizeof(struct spi_flash),
+};

source/bootloader/u-boot-2020.01/drivers/mtd/spi/sf_dataflash.c

@@ -0,0 +1,695 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Atmel DataFlash probing
+ *
+ * Copyright (C) 2004-2009, 2015 Freescale Semiconductor, Inc.
+ * Haikun Wang (haikun.wang@freescale.com)
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <fdtdec.h>
+#include <spi.h>
+#include <spi_flash.h>
+#include <div64.h>
+#include <linux/err.h>
+#include <linux/math64.h>
+
+#include "sf_internal.h"
+
+#define CMD_READ_ID		0x9f
+/* reads can bypass the buffers */
+#define OP_READ_CONTINUOUS	0xE8
+#define OP_READ_PAGE		0xD2
+
+/* group B requests can run even while status reports "busy" */
+#define OP_READ_STATUS		0xD7	/* group B */
+
+/* move data between host and buffer */
+#define OP_READ_BUFFER1		0xD4	/* group B */
+#define OP_READ_BUFFER2		0xD6	/* group B */
+#define OP_WRITE_BUFFER1	0x84	/* group B */
+#define OP_WRITE_BUFFER2	0x87	/* group B */
+
+/* erasing flash */
+#define OP_ERASE_PAGE		0x81
+#define OP_ERASE_BLOCK		0x50
+
+/* move data between buffer and flash */
+#define OP_TRANSFER_BUF1	0x53
+#define OP_TRANSFER_BUF2	0x55
+#define OP_MREAD_BUFFER1	0xD4
+#define OP_MREAD_BUFFER2	0xD6
+#define OP_MWERASE_BUFFER1	0x83
+#define OP_MWERASE_BUFFER2	0x86
+#define OP_MWRITE_BUFFER1	0x88	/* sector must be pre-erased */
+#define OP_MWRITE_BUFFER2	0x89	/* sector must be pre-erased */
+
+/* write to buffer, then write-erase to flash */
+#define OP_PROGRAM_VIA_BUF1	0x82
+#define OP_PROGRAM_VIA_BUF2	0x85
+
+/* compare buffer to flash */
+#define OP_COMPARE_BUF1		0x60
+#define OP_COMPARE_BUF2		0x61
+
+/* read flash to buffer, then write-erase to flash */
+#define OP_REWRITE_VIA_BUF1	0x58
+#define OP_REWRITE_VIA_BUF2	0x59
+
+/*
+ * newer chips report JEDEC manufacturer and device IDs; chip
+ * serial number and OTP bits; and per-sector writeprotect.
+ */
+#define OP_READ_ID		0x9F
+#define OP_READ_SECURITY	0x77
+#define OP_WRITE_SECURITY_REVC	0x9A
+#define OP_WRITE_SECURITY	0x9B	/* revision D */
+
+struct dataflash {
+	uint8_t			command[16];
+	unsigned short		page_offset;	/* offset in flash address */
+};
+
+/* Return the status of the DataFlash device */
+static inline int dataflash_status(struct spi_slave *spi)
+{
+	int ret;
+	u8 opcode = OP_READ_STATUS;
+	u8 status;
+
+	/*
+	 * NOTE:  at45db321c over 25 MHz wants to write
+	 * a dummy byte after the opcode...
+	 */
+	ret =  spi_write_then_read(spi, &opcode, 1, NULL, &status, 1);
+	return ret ? -EIO : status;
+}
+
+/*
+ * Poll the DataFlash device until it is READY.
+ * This usually takes 5-20 msec or so; more for sector erase.
+ * ready: return > 0
+ */
+static int dataflash_waitready(struct spi_slave *spi)
+{
+	int status;
+	int timeout = 2 * CONFIG_SYS_HZ;
+	int timebase;
+
+	timebase = get_timer(0);
+	do {
+		status = dataflash_status(spi);
+		if (status < 0)
+			status = 0;
+
+		if (status & (1 << 7))	/* RDY/nBSY */
+			return status;
+
+		mdelay(3);
+	} while (get_timer(timebase) < timeout);
+
+	return -ETIME;
+}
+
+/* Erase pages of flash */
+static int spi_dataflash_erase(struct udevice *dev, u32 offset, size_t len)
+{
+	struct dataflash	*dataflash;
+	struct spi_flash	*spi_flash;
+	struct spi_slave	*spi;
+	unsigned		blocksize;
+	uint8_t			*command;
+	uint32_t		rem;
+	int			status;
+
+	dataflash = dev_get_priv(dev);
+	spi_flash = dev_get_uclass_priv(dev);
+	spi = spi_flash->spi;
+
+	blocksize = spi_flash->page_size << 3;
+
+	memset(dataflash->command, 0 , sizeof(dataflash->command));
+	command = dataflash->command;
+
+	debug("%s: erase addr=0x%x len 0x%x\n", dev->name, offset, len);
+
+	div_u64_rem(len, spi_flash->page_size, &rem);
+	if (rem) {
+		printf("%s: len(0x%x) isn't the multiple of page size(0x%x)\n",
+		       dev->name, len, spi_flash->page_size);
+		return -EINVAL;
+	}
+	div_u64_rem(offset, spi_flash->page_size, &rem);
+	if (rem) {
+		printf("%s: offset(0x%x) isn't the multiple of page size(0x%x)\n",
+		       dev->name, offset, spi_flash->page_size);
+		return -EINVAL;
+	}
+
+	status = spi_claim_bus(spi);
+	if (status) {
+		debug("dataflash: unable to claim SPI bus\n");
+		return status;
+	}
+
+	while (len > 0) {
+		unsigned int	pageaddr;
+		int		do_block;
+		/*
+		 * Calculate flash page address; use block erase (for speed) if
+		 * we're at a block boundary and need to erase the whole block.
+		 */
+		pageaddr = div_u64(offset, spi_flash->page_size);
+		do_block = (pageaddr & 0x7) == 0 && len >= blocksize;
+		pageaddr = pageaddr << dataflash->page_offset;
+
+		command[0] = do_block ? OP_ERASE_BLOCK : OP_ERASE_PAGE;
+		command[1] = (uint8_t)(pageaddr >> 16);
+		command[2] = (uint8_t)(pageaddr >> 8);
+		command[3] = 0;
+
+		debug("%s ERASE %s: (%x) %x %x %x [%d]\n",
+		      dev->name, do_block ? "block" : "page",
+		      command[0], command[1], command[2], command[3],
+		      pageaddr);
+
+		status = spi_write_then_read(spi, command, 4, NULL, NULL, 0);
+		if (status < 0) {
+			debug("%s: erase send command error!\n", dev->name);
+			return -EIO;
+		}
+
+		status = dataflash_waitready(spi);
+		if (status < 0) {
+			debug("%s: erase waitready error!\n", dev->name);
+			return status;
+		}
+
+		if (do_block) {
+			offset += blocksize;
+			len -= blocksize;
+		} else {
+			offset += spi_flash->page_size;
+			len -= spi_flash->page_size;
+		}
+	}
+
+	spi_release_bus(spi);
+
+	return 0;
+}
+
+/*
+ * Read from the DataFlash device.
+ *   offset : Start offset in flash device
+ *   len    : Amount to read
+ *   buf    : Buffer containing the data
+ */
+static int spi_dataflash_read(struct udevice *dev, u32 offset, size_t len,
+			      void *buf)
+{
+	struct dataflash	*dataflash;
+	struct spi_flash	*spi_flash;
+	struct spi_slave	*spi;
+	unsigned int		addr;
+	uint8_t			*command;
+	int			status;
+
+	dataflash = dev_get_priv(dev);
+	spi_flash = dev_get_uclass_priv(dev);
+	spi = spi_flash->spi;
+
+	memset(dataflash->command, 0 , sizeof(dataflash->command));
+	command = dataflash->command;
+
+	debug("%s: erase addr=0x%x len 0x%x\n", dev->name, offset, len);
+	debug("READ: (%x) %x %x %x\n",
+	      command[0], command[1], command[2], command[3]);
+
+	/* Calculate flash page/byte address */
+	addr = (((unsigned)offset / spi_flash->page_size)
+	       << dataflash->page_offset)
+	       + ((unsigned)offset % spi_flash->page_size);
+
+	status = spi_claim_bus(spi);
+	if (status) {
+		debug("dataflash: unable to claim SPI bus\n");
+		return status;
+	}
+
+	/*
+	 * Continuous read, max clock = f(car) which may be less than
+	 * the peak rate available.  Some chips support commands with
+	 * fewer "don't care" bytes.  Both buffers stay unchanged.
+	 */
+	command[0] = OP_READ_CONTINUOUS;
+	command[1] = (uint8_t)(addr >> 16);
+	command[2] = (uint8_t)(addr >> 8);
+	command[3] = (uint8_t)(addr >> 0);
+
+	/* plus 4 "don't care" bytes, command len: 4 + 4 "don't care" bytes */
+	status = spi_write_then_read(spi, command, 8, NULL, buf, len);
+
+	spi_release_bus(spi);
+
+	return status;
+}
+
+/*
+ * Write to the DataFlash device.
+ *   offset     : Start offset in flash device
+ *   len    : Amount to write
+ *   buf    : Buffer containing the data
+ */
+int spi_dataflash_write(struct udevice *dev, u32 offset, size_t len,
+			const void *buf)
+{
+	struct dataflash	*dataflash;
+	struct spi_flash	*spi_flash;
+	struct spi_slave	*spi;
+	uint8_t			*command;
+	unsigned int		pageaddr, addr, to, writelen;
+	size_t			remaining = len;
+	u_char			*writebuf = (u_char *)buf;
+	int			status = -EINVAL;
+
+	dataflash = dev_get_priv(dev);
+	spi_flash = dev_get_uclass_priv(dev);
+	spi = spi_flash->spi;
+
+	memset(dataflash->command, 0 , sizeof(dataflash->command));
+	command = dataflash->command;
+
+	debug("%s: write 0x%x..0x%x\n", dev->name, offset, (offset + len));
+
+	pageaddr = ((unsigned)offset / spi_flash->page_size);
+	to = ((unsigned)offset % spi_flash->page_size);
+	if (to + len > spi_flash->page_size)
+		writelen = spi_flash->page_size - to;
+	else
+		writelen = len;
+
+	status = spi_claim_bus(spi);
+	if (status) {
+		debug("dataflash: unable to claim SPI bus\n");
+		return status;
+	}
+
+	while (remaining > 0) {
+		debug("write @ %d:%d len=%d\n", pageaddr, to, writelen);
+
+		/*
+		 * REVISIT:
+		 * (a) each page in a sector must be rewritten at least
+		 *     once every 10K sibling erase/program operations.
+		 * (b) for pages that are already erased, we could
+		 *     use WRITE+MWRITE not PROGRAM for ~30% speedup.
+		 * (c) WRITE to buffer could be done while waiting for
+		 *     a previous MWRITE/MWERASE to complete ...
+		 * (d) error handling here seems to be mostly missing.
+		 *
+		 * Two persistent bits per page, plus a per-sector counter,
+		 * could support (a) and (b) ... we might consider using
+		 * the second half of sector zero, which is just one block,
+		 * to track that state.  (On AT91, that sector should also
+		 * support boot-from-DataFlash.)
+		 */
+
+		addr = pageaddr << dataflash->page_offset;
+
+		/* (1) Maybe transfer partial page to Buffer1 */
+		if (writelen != spi_flash->page_size) {
+			command[0] = OP_TRANSFER_BUF1;
+			command[1] = (addr & 0x00FF0000) >> 16;
+			command[2] = (addr & 0x0000FF00) >> 8;
+			command[3] = 0;
+
+			debug("TRANSFER: (%x) %x %x %x\n",
+			      command[0], command[1], command[2], command[3]);
+
+			status = spi_write_then_read(spi, command, 4,
+						     NULL, NULL, 0);
+			if (status < 0) {
+				debug("%s: write(<pagesize) command error!\n",
+				      dev->name);
+				return -EIO;
+			}
+
+			status = dataflash_waitready(spi);
+			if (status < 0) {
+				debug("%s: write(<pagesize) waitready error!\n",
+				      dev->name);
+				return status;
+			}
+		}
+
+		/* (2) Program full page via Buffer1 */
+		addr += to;
+		command[0] = OP_PROGRAM_VIA_BUF1;
+		command[1] = (addr & 0x00FF0000) >> 16;
+		command[2] = (addr & 0x0000FF00) >> 8;
+		command[3] = (addr & 0x000000FF);
+
+		debug("PROGRAM: (%x) %x %x %x\n",
+		      command[0], command[1], command[2], command[3]);
+
+		status = spi_write_then_read(spi, command, 4,
+					     writebuf, NULL, writelen);
+		if (status < 0) {
+			debug("%s: write send command error!\n", dev->name);
+			return -EIO;
+		}
+
+		status = dataflash_waitready(spi);
+		if (status < 0) {
+			debug("%s: write waitready error!\n", dev->name);
+			return status;
+		}
+
+#ifdef CONFIG_SPI_DATAFLASH_WRITE_VERIFY
+		/* (3) Compare to Buffer1 */
+		addr = pageaddr << dataflash->page_offset;
+		command[0] = OP_COMPARE_BUF1;
+		command[1] = (addr & 0x00FF0000) >> 16;
+		command[2] = (addr & 0x0000FF00) >> 8;
+		command[3] = 0;
+
+		debug("COMPARE: (%x) %x %x %x\n",
+		      command[0], command[1], command[2], command[3]);
+
+		status = spi_write_then_read(spi, command, 4,
+					     writebuf, NULL, writelen);
+		if (status < 0) {
+			debug("%s: write(compare) send command error!\n",
+			      dev->name);
+			return -EIO;
+		}
+
+		status = dataflash_waitready(spi);
+
+		/* Check result of the compare operation */
+		if (status & (1 << 6)) {
+			printf("dataflash: write compare page %u, err %d\n",
+			       pageaddr, status);
+			remaining = 0;
+			status = -EIO;
+			break;
+		} else {
+			status = 0;
+		}
+
+#endif	/* CONFIG_SPI_DATAFLASH_WRITE_VERIFY */
+		remaining = remaining - writelen;
+		pageaddr++;
+		to = 0;
+		writebuf += writelen;
+
+		if (remaining > spi_flash->page_size)
+			writelen = spi_flash->page_size;
+		else
+			writelen = remaining;
+	}
+
+	spi_release_bus(spi);
+
+	return 0;
+}
+
+static int add_dataflash(struct udevice *dev, char *name, int nr_pages,
+			     int pagesize, int pageoffset, char revision)
+{
+	struct spi_flash *spi_flash;
+	struct dataflash *dataflash;
+
+	dataflash = dev_get_priv(dev);
+	spi_flash = dev_get_uclass_priv(dev);
+
+	dataflash->page_offset = pageoffset;
+
+	spi_flash->name = name;
+	spi_flash->page_size = pagesize;
+	spi_flash->size = nr_pages * pagesize;
+	spi_flash->erase_size = pagesize;
+
+#ifndef CONFIG_SPL_BUILD
+	printf("SPI DataFlash: Detected %s with page size ", spi_flash->name);
+	print_size(spi_flash->page_size, ", erase size ");
+	print_size(spi_flash->erase_size, ", total ");
+	print_size(spi_flash->size, "");
+	printf(", revision %c", revision);
+	puts("\n");
+#endif
+
+	return 0;
+}
+
+struct data_flash_info {
+	char		*name;
+
+	/*
+	 * JEDEC id has a high byte of zero plus three data bytes:
+	 * the manufacturer id, then a two byte device id.
+	 */
+	uint32_t	jedec_id;
+
+	/* The size listed here is what works with OP_ERASE_PAGE. */
+	unsigned	nr_pages;
+	uint16_t	pagesize;
+	uint16_t	pageoffset;
+
+	uint16_t	flags;
+#define SUP_POW2PS	0x0002		/* supports 2^N byte pages */
+#define IS_POW2PS	0x0001		/* uses 2^N byte pages */
+};
+
+static struct data_flash_info dataflash_data[] = {
+	/*
+	 * NOTE:  chips with SUP_POW2PS (rev D and up) need two entries,
+	 * one with IS_POW2PS and the other without.  The entry with the
+	 * non-2^N byte page size can't name exact chip revisions without
+	 * losing backwards compatibility for cmdlinepart.
+	 *
+	 * Those two entries have different name spelling format in order to
+	 * show their difference obviously.
+	 * The upper case refer to the chip isn't in normal 2^N bytes page-size
+	 * mode.
+	 * The lower case refer to the chip is in normal 2^N bytes page-size
+	 * mode.
+	 *
+	 * These newer chips also support 128-byte security registers (with
+	 * 64 bytes one-time-programmable) and software write-protection.
+	 */
+	{ "AT45DB011B",  0x1f2200, 512, 264, 9, SUP_POW2PS},
+	{ "at45db011d",  0x1f2200, 512, 256, 8, SUP_POW2PS | IS_POW2PS},
+
+	{ "AT45DB021B",  0x1f2300, 1024, 264, 9, SUP_POW2PS},
+	{ "at45db021d",  0x1f2300, 1024, 256, 8, SUP_POW2PS | IS_POW2PS},
+
+	{ "AT45DB041x",  0x1f2400, 2048, 264, 9, SUP_POW2PS},
+	{ "at45db041d",  0x1f2400, 2048, 256, 8, SUP_POW2PS | IS_POW2PS},
+
+	{ "AT45DB081B",  0x1f2500, 4096, 264, 9, SUP_POW2PS},
+	{ "at45db081d",  0x1f2500, 4096, 256, 8, SUP_POW2PS | IS_POW2PS},
+
+	{ "AT45DB161x",  0x1f2600, 4096, 528, 10, SUP_POW2PS},
+	{ "at45db161d",  0x1f2600, 4096, 512, 9, SUP_POW2PS | IS_POW2PS},
+
+	{ "AT45DB321x",  0x1f2700, 8192, 528, 10, 0},		/* rev C */
+
+	{ "AT45DB321x",  0x1f2701, 8192, 528, 10, SUP_POW2PS},
+	{ "at45db321d",  0x1f2701, 8192, 512, 9, SUP_POW2PS | IS_POW2PS},
+
+	{ "AT45DB642x",  0x1f2800, 8192, 1056, 11, SUP_POW2PS},
+	{ "at45db642d",  0x1f2800, 8192, 1024, 10, SUP_POW2PS | IS_POW2PS},
+};
+
+static struct data_flash_info *jedec_probe(struct spi_slave *spi)
+{
+	int			tmp;
+	uint8_t			id[5];
+	uint32_t		jedec;
+	struct data_flash_info	*info;
+	u8 opcode		= CMD_READ_ID;
+	int status;
+
+	/*
+	 * JEDEC also defines an optional "extended device information"
+	 * string for after vendor-specific data, after the three bytes
+	 * we use here.  Supporting some chips might require using it.
+	 *
+	 * If the vendor ID isn't Atmel's (0x1f), assume this call failed.
+	 * That's not an error; only rev C and newer chips handle it, and
+	 * only Atmel sells these chips.
+	 */
+	tmp = spi_write_then_read(spi, &opcode, 1, NULL, id, sizeof(id));
+	if (tmp < 0) {
+		printf("dataflash: error %d reading JEDEC ID\n", tmp);
+		return ERR_PTR(tmp);
+	}
+	if (id[0] != 0x1f)
+		return NULL;
+
+	jedec = id[0];
+	jedec = jedec << 8;
+	jedec |= id[1];
+	jedec = jedec << 8;
+	jedec |= id[2];
+
+	for (tmp = 0, info = dataflash_data;
+			tmp < ARRAY_SIZE(dataflash_data);
+			tmp++, info++) {
+		if (info->jedec_id == jedec) {
+			if (info->flags & SUP_POW2PS) {
+				status = dataflash_status(spi);
+				if (status < 0) {
+					debug("dataflash: status error %d\n",
+					      status);
+					return NULL;
+				}
+				if (status & 0x1) {
+					if (info->flags & IS_POW2PS)
+						return info;
+				} else {
+					if (!(info->flags & IS_POW2PS))
+						return info;
+				}
+			} else {
+				return info;
+			}
+		}
+	}
+
+	/*
+	 * Treat other chips as errors ... we won't know the right page
+	 * size (it might be binary) even when we can tell which density
+	 * class is involved (legacy chip id scheme).
+	 */
+	printf("dataflash: JEDEC id %06x not handled\n", jedec);
+	return ERR_PTR(-ENODEV);
+}
+
+/*
+ * Detect and initialize DataFlash device, using JEDEC IDs on newer chips
+ * or else the ID code embedded in the status bits:
+ *
+ *   Device      Density         ID code          #Pages PageSize  Offset
+ *   AT45DB011B  1Mbit   (128K)  xx0011xx (0x0c)    512    264      9
+ *   AT45DB021B  2Mbit   (256K)  xx0101xx (0x14)   1024    264      9
+ *   AT45DB041B  4Mbit   (512K)  xx0111xx (0x1c)   2048    264      9
+ *   AT45DB081B  8Mbit   (1M)    xx1001xx (0x24)   4096    264      9
+ *   AT45DB0161B 16Mbit  (2M)    xx1011xx (0x2c)   4096    528     10
+ *   AT45DB0321B 32Mbit  (4M)    xx1101xx (0x34)   8192    528     10
+ *   AT45DB0642  64Mbit  (8M)    xx111xxx (0x3c)   8192   1056     11
+ *   AT45DB1282  128Mbit (16M)   xx0100xx (0x10)  16384   1056     11
+ */
+static int spi_dataflash_probe(struct udevice *dev)
+{
+	struct spi_slave *spi = dev_get_parent_priv(dev);
+	struct spi_flash *spi_flash;
+	struct data_flash_info *info;
+	int status;
+
+	spi_flash = dev_get_uclass_priv(dev);
+	spi_flash->spi = spi;
+	spi_flash->dev = dev;
+
+	status = spi_claim_bus(spi);
+	if (status)
+		return status;
+
+	/*
+	 * Try to detect dataflash by JEDEC ID.
+	 * If it succeeds we know we have either a C or D part.
+	 * D will support power of 2 pagesize option.
+	 * Both support the security register, though with different
+	 * write procedures.
+	 */
+	info = jedec_probe(spi);
+	if (IS_ERR(info))
+		goto err_jedec_probe;
+	if (info != NULL) {
+		status = add_dataflash(dev, info->name, info->nr_pages,
+				info->pagesize, info->pageoffset,
+				(info->flags & SUP_POW2PS) ? 'd' : 'c');
+		if (status < 0)
+			goto err_status;
+	}
+
+       /*
+	* Older chips support only legacy commands, identifing
+	* capacity using bits in the status byte.
+	*/
+	status = dataflash_status(spi);
+	if (status <= 0 || status == 0xff) {
+		printf("dataflash: read status error %d\n", status);
+		if (status == 0 || status == 0xff)
+			status = -ENODEV;
+		goto err_jedec_probe;
+	}
+
+       /*
+	* if there's a device there, assume it's dataflash.
+	* board setup should have set spi->max_speed_max to
+	* match f(car) for continuous reads, mode 0 or 3.
+	*/
+	switch (status & 0x3c) {
+	case 0x0c:	/* 0 0 1 1 x x */
+		status = add_dataflash(dev, "AT45DB011B", 512, 264, 9, 0);
+		break;
+	case 0x14:	/* 0 1 0 1 x x */
+		status = add_dataflash(dev, "AT45DB021B", 1024, 264, 9, 0);
+		break;
+	case 0x1c:	/* 0 1 1 1 x x */
+		status = add_dataflash(dev, "AT45DB041x", 2048, 264, 9, 0);
+		break;
+	case 0x24:	/* 1 0 0 1 x x */
+		status = add_dataflash(dev, "AT45DB081B", 4096, 264, 9, 0);
+		break;
+	case 0x2c:	/* 1 0 1 1 x x */
+		status = add_dataflash(dev, "AT45DB161x", 4096, 528, 10, 0);
+		break;
+	case 0x34:	/* 1 1 0 1 x x */
+		status = add_dataflash(dev, "AT45DB321x", 8192, 528, 10, 0);
+		break;
+	case 0x38:	/* 1 1 1 x x x */
+	case 0x3c:
+		status = add_dataflash(dev, "AT45DB642x", 8192, 1056, 11, 0);
+		break;
+	/* obsolete AT45DB1282 not (yet?) supported */
+	default:
+		printf("dataflash: unsupported device (%x)\n", status & 0x3c);
+		status = -ENODEV;
+		goto err_status;
+	}
+
+	return status;
+
+err_status:
+	spi_free_slave(spi);
+err_jedec_probe:
+	spi_release_bus(spi);
+	return status;
+}
+
+static const struct dm_spi_flash_ops spi_dataflash_ops = {
+	.read = spi_dataflash_read,
+	.write = spi_dataflash_write,
+	.erase = spi_dataflash_erase,
+};
+
+static const struct udevice_id spi_dataflash_ids[] = {
+	{ .compatible = "atmel,at45", },
+	{ .compatible = "atmel,dataflash", },
+	{ }
+};
+
+U_BOOT_DRIVER(spi_dataflash) = {
+	.name		= "spi_dataflash",
+	.id		= UCLASS_SPI_FLASH,
+	.of_match	= spi_dataflash_ids,
+	.probe		= spi_dataflash_probe,
+	.priv_auto_alloc_size = sizeof(struct dataflash),
+	.ops		= &spi_dataflash_ops,
+};

source/bootloader/u-boot-2020.01/drivers/mtd/spi/sf_internal.h

@@ -0,0 +1,84 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * SPI flash internal definitions
+ *
+ * Copyright (C) 2008 Atmel Corporation
+ * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
+ */
+
+#ifndef _SF_INTERNAL_H_
+#define _SF_INTERNAL_H_
+
+#include <linux/types.h>
+#include <linux/compiler.h>
+
+#define SPI_NOR_MAX_ID_LEN	6
+#define SPI_NOR_MAX_ADDR_WIDTH	4
+
+struct flash_info {
+#if !CONFIG_IS_ENABLED(SPI_FLASH_TINY)
+	char		*name;
+#endif
+
+	/*
+	 * This array stores the ID bytes.
+	 * The first three bytes are the JEDIC ID.
+	 * JEDEC ID zero means "no ID" (mostly older chips).
+	 */
+	u8		id[SPI_NOR_MAX_ID_LEN];
+	u8		id_len;
+
+	/* The size listed here is what works with SPINOR_OP_SE, which isn't
+	 * necessarily called a "sector" by the vendor.
+	 */
+	unsigned int	sector_size;
+	u16		n_sectors;
+
+	u16		page_size;
+	u16		addr_width;
+
+	u16		flags;
+#define SECT_4K			BIT(0)	/* SPINOR_OP_BE_4K works uniformly */
+#define SPI_NOR_NO_ERASE	BIT(1)	/* No erase command needed */
+#define SST_WRITE		BIT(2)	/* use SST byte programming */
+#define SPI_NOR_NO_FR		BIT(3)	/* Can't do fastread */
+#define SECT_4K_PMC		BIT(4)	/* SPINOR_OP_BE_4K_PMC works uniformly */
+#define SPI_NOR_DUAL_READ	BIT(5)	/* Flash supports Dual Read */
+#define SPI_NOR_QUAD_READ	BIT(6)	/* Flash supports Quad Read */
+#define USE_FSR			BIT(7)	/* use flag status register */
+#define SPI_NOR_HAS_LOCK	BIT(8)	/* Flash supports lock/unlock via SR */
+#define SPI_NOR_HAS_TB		BIT(9)	/*
+					 * Flash SR has Top/Bottom (TB) protect
+					 * bit. Must be used with
+					 * SPI_NOR_HAS_LOCK.
+					 */
+#define	SPI_S3AN		BIT(10)	/*
+					 * Xilinx Spartan 3AN In-System Flash
+					 * (MFR cannot be used for probing
+					 * because it has the same value as
+					 * ATMEL flashes)
+					 */
+#define SPI_NOR_4B_OPCODES	BIT(11)	/*
+					 * Use dedicated 4byte address op codes
+					 * to support memory size above 128Mib.
+					 */
+#define NO_CHIP_ERASE		BIT(12) /* Chip does not support chip erase */
+#define SPI_NOR_SKIP_SFDP	BIT(13)	/* Skip parsing of SFDP tables */
+#define USE_CLSR		BIT(14)	/* use CLSR command */
+#define SPI_NOR_HAS_SST26LOCK	BIT(15)	/* Flash supports lock/unlock via BPR */
+};
+
+extern const struct flash_info spi_nor_ids[];
+
+#define JEDEC_MFR(info)	((info)->id[0])
+#define JEDEC_ID(info)		(((info)->id[1]) << 8 | ((info)->id[2]))
+
+/* Get software write-protect value (BP bits) */
+int spi_flash_cmd_get_sw_write_prot(struct spi_flash *flash);
+
+
+#if CONFIG_IS_ENABLED(SPI_FLASH_MTD)
+int spi_flash_mtd_register(struct spi_flash *flash);
+void spi_flash_mtd_unregister(void);
+#endif
+#endif /* _SF_INTERNAL_H_ */

source/bootloader/u-boot-2020.01/drivers/mtd/spi/sf_mtd.c

@@ -0,0 +1,147 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2012-2014 Daniel Schwierzeck, daniel.schwierzeck@gmail.com
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <linux/errno.h>
+#include <linux/mtd/mtd.h>
+#include <spi_flash.h>
+
+static struct mtd_info sf_mtd_info;
+static bool sf_mtd_registered;
+static char sf_mtd_name[8];
+
+static int spi_flash_mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+	struct spi_flash *flash = mtd->priv;
+	int err;
+
+	if (!flash)
+		return -ENODEV;
+
+	instr->state = MTD_ERASING;
+
+	err = spi_flash_erase(flash, instr->addr, instr->len);
+	if (err) {
+		instr->state = MTD_ERASE_FAILED;
+		instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
+		return -EIO;
+	}
+
+	instr->state = MTD_ERASE_DONE;
+	mtd_erase_callback(instr);
+
+	return 0;
+}
+
+static int spi_flash_mtd_read(struct mtd_info *mtd, loff_t from, size_t len,
+	size_t *retlen, u_char *buf)
+{
+	struct spi_flash *flash = mtd->priv;
+	int err;
+
+	if (!flash)
+		return -ENODEV;
+
+	err = spi_flash_read(flash, from, len, buf);
+	if (!err)
+		*retlen = len;
+
+	return err;
+}
+
+static int spi_flash_mtd_write(struct mtd_info *mtd, loff_t to, size_t len,
+	size_t *retlen, const u_char *buf)
+{
+	struct spi_flash *flash = mtd->priv;
+	int err;
+
+	if (!flash)
+		return -ENODEV;
+
+	err = spi_flash_write(flash, to, len, buf);
+	if (!err)
+		*retlen = len;
+
+	return err;
+}
+
+static void spi_flash_mtd_sync(struct mtd_info *mtd)
+{
+}
+
+static int spi_flash_mtd_number(void)
+{
+#ifdef CONFIG_SYS_MAX_FLASH_BANKS
+	return CONFIG_SYS_MAX_FLASH_BANKS;
+#else
+	return 0;
+#endif
+}
+
+int spi_flash_mtd_register(struct spi_flash *flash)
+{
+	int ret;
+
+	if (sf_mtd_registered) {
+		ret = del_mtd_device(&sf_mtd_info);
+		if (ret)
+			return ret;
+
+		sf_mtd_registered = false;
+	}
+
+	sf_mtd_registered = false;
+	memset(&sf_mtd_info, 0, sizeof(sf_mtd_info));
+	sprintf(sf_mtd_name, "nor%d", spi_flash_mtd_number());
+
+	sf_mtd_info.name = sf_mtd_name;
+	sf_mtd_info.type = MTD_NORFLASH;
+	sf_mtd_info.flags = MTD_CAP_NORFLASH;
+	sf_mtd_info.writesize = 1;
+	sf_mtd_info.writebufsize = flash->page_size;
+
+	sf_mtd_info._erase = spi_flash_mtd_erase;
+	sf_mtd_info._read = spi_flash_mtd_read;
+	sf_mtd_info._write = spi_flash_mtd_write;
+	sf_mtd_info._sync = spi_flash_mtd_sync;
+
+	sf_mtd_info.size = flash->size;
+	sf_mtd_info.priv = flash;
+
+	/* Only uniform flash devices for now */
+	sf_mtd_info.numeraseregions = 0;
+	sf_mtd_info.erasesize = flash->sector_size;
+
+	ret = add_mtd_device(&sf_mtd_info);
+	if (!ret)
+		sf_mtd_registered = true;
+
+	return ret;
+}
+
+void spi_flash_mtd_unregister(void)
+{
+	int ret;
+
+	if (!sf_mtd_registered)
+		return;
+
+	ret = del_mtd_device(&sf_mtd_info);
+	if (!ret) {
+		sf_mtd_registered = false;
+		return;
+	}
+
+	/*
+	 * Setting mtd->priv to NULL is the best we can do. Thanks to that,
+	 * the MTD layer can still call mtd hooks without risking a
+	 * use-after-free bug. Still, things should be fixed to prevent the
+	 * spi_flash object from being destroyed when del_mtd_device() fails.
+	 */
+	sf_mtd_info.priv = NULL;
+	printf("Failed to unregister MTD %s and the spi_flash object is going away: you're in deep trouble!",
+	       sf_mtd_info.name);
+}

source/bootloader/u-boot-2020.01/drivers/mtd/spi/sf_probe.c

@@ -0,0 +1,183 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * SPI flash probing
+ *
+ * Copyright (C) 2008 Atmel Corporation
+ * Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
+ * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <malloc.h>
+#include <spi.h>
+#include <spi_flash.h>
+
+#include "sf_internal.h"
+
+/**
+ * spi_flash_probe_slave() - Probe for a SPI flash device on a bus
+ *
+ * @flashp: Pointer to place to put flash info, which may be NULL if the
+ * space should be allocated
+ */
+static int spi_flash_probe_slave(struct spi_flash *flash)
+{
+	struct spi_slave *spi = flash->spi;
+	int ret;
+
+	/* Setup spi_slave */
+	if (!spi) {
+		printf("SF: Failed to set up slave\n");
+		return -ENODEV;
+	}
+
+	/* Claim spi bus */
+	ret = spi_claim_bus(spi);
+	if (ret) {
+		debug("SF: Failed to claim SPI bus: %d\n", ret);
+		return ret;
+	}
+
+	ret = spi_nor_scan(flash);
+	if (ret)
+		goto err_read_id;
+
+#if CONFIG_IS_ENABLED(SPI_FLASH_MTD)
+	ret = spi_flash_mtd_register(flash);
+#endif
+
+err_read_id:
+	spi_release_bus(spi);
+	return ret;
+}
+
+#ifndef CONFIG_DM_SPI_FLASH
+struct spi_flash *spi_flash_probe(unsigned int busnum, unsigned int cs,
+				  unsigned int max_hz, unsigned int spi_mode)
+{
+	struct spi_slave *bus;
+	struct spi_flash *flash;
+
+	bus = spi_setup_slave(busnum, cs, max_hz, spi_mode);
+	if (!bus)
+		return NULL;
+
+	/* Allocate space if needed (not used by sf-uclass */
+	flash = calloc(1, sizeof(*flash));
+	if (!flash) {
+		debug("SF: Failed to allocate spi_flash\n");
+		return NULL;
+	}
+
+	flash->spi = bus;
+	if (spi_flash_probe_slave(flash)) {
+		spi_free_slave(bus);
+		free(flash);
+		return NULL;
+	}
+
+	return flash;
+}
+
+void spi_flash_free(struct spi_flash *flash)
+{
+#if CONFIG_IS_ENABLED(SPI_FLASH_MTD)
+	spi_flash_mtd_unregister();
+#endif
+	spi_free_slave(flash->spi);
+	free(flash);
+}
+
+#else /* defined CONFIG_DM_SPI_FLASH */
+
+static int spi_flash_std_read(struct udevice *dev, u32 offset, size_t len,
+			      void *buf)
+{
+	struct spi_flash *flash = dev_get_uclass_priv(dev);
+	struct mtd_info *mtd = &flash->mtd;
+	size_t retlen;
+
+	return log_ret(mtd->_read(mtd, offset, len, &retlen, buf));
+}
+
+static int spi_flash_std_write(struct udevice *dev, u32 offset, size_t len,
+			       const void *buf)
+{
+	struct spi_flash *flash = dev_get_uclass_priv(dev);
+	struct mtd_info *mtd = &flash->mtd;
+	size_t retlen;
+
+	return mtd->_write(mtd, offset, len, &retlen, buf);
+}
+
+static int spi_flash_std_erase(struct udevice *dev, u32 offset, size_t len)
+{
+	struct spi_flash *flash = dev_get_uclass_priv(dev);
+	struct mtd_info *mtd = &flash->mtd;
+	struct erase_info instr;
+
+	if (offset % mtd->erasesize || len % mtd->erasesize) {
+		printf("SF: Erase offset/length not multiple of erase size\n");
+		return -EINVAL;
+	}
+
+	memset(&instr, 0, sizeof(instr));
+	instr.addr = offset;
+	instr.len = len;
+
+	return mtd->_erase(mtd, &instr);
+}
+
+static int spi_flash_std_get_sw_write_prot(struct udevice *dev)
+{
+	struct spi_flash *flash = dev_get_uclass_priv(dev);
+
+	return spi_flash_cmd_get_sw_write_prot(flash);
+}
+
+static int spi_flash_std_probe(struct udevice *dev)
+{
+	struct spi_slave *slave = dev_get_parent_priv(dev);
+	struct dm_spi_slave_platdata *plat = dev_get_parent_platdata(dev);
+	struct spi_flash *flash;
+
+	flash = dev_get_uclass_priv(dev);
+	flash->dev = dev;
+	flash->spi = slave;
+	debug("%s: slave=%p, cs=%d\n", __func__, slave, plat->cs);
+	return spi_flash_probe_slave(flash);
+}
+
+static int spi_flash_std_remove(struct udevice *dev)
+{
+#if CONFIG_IS_ENABLED(SPI_FLASH_MTD)
+	spi_flash_mtd_unregister();
+#endif
+	return 0;
+}
+
+static const struct dm_spi_flash_ops spi_flash_std_ops = {
+	.read = spi_flash_std_read,
+	.write = spi_flash_std_write,
+	.erase = spi_flash_std_erase,
+	.get_sw_write_prot = spi_flash_std_get_sw_write_prot,
+};
+
+static const struct udevice_id spi_flash_std_ids[] = {
+	{ .compatible = "jedec,spi-nor" },
+	{ }
+};
+
+U_BOOT_DRIVER(spi_flash_std) = {
+	.name		= "spi_flash_std",
+	.id		= UCLASS_SPI_FLASH,
+	.of_match	= spi_flash_std_ids,
+	.probe		= spi_flash_std_probe,
+	.remove		= spi_flash_std_remove,
+	.priv_auto_alloc_size = sizeof(struct spi_flash),
+	.ops		= &spi_flash_std_ops,
+};
+
+#endif /* CONFIG_DM_SPI_FLASH */

source/bootloader/u-boot-2020.01/drivers/mtd/spi/spi-nor-ids.c

@@ -0,0 +1,320 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ *
+ * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
+ * Copyright (C) 2016 Jagan Teki <jagan@openedev.com>
+ * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
+ */
+
+#include <common.h>
+#include <spi.h>
+#include <spi_flash.h>
+
+#include "sf_internal.h"
+
+/* Exclude chip names for SPL to save space */
+#if !CONFIG_IS_ENABLED(SPI_FLASH_TINY)
+#define INFO_NAME(_name) .name = _name,
+#else
+#define INFO_NAME(_name)
+#endif
+
+/* Used when the "_ext_id" is two bytes at most */
+#define INFO(_name, _jedec_id, _ext_id, _sector_size, _n_sectors, _flags)	\
+		INFO_NAME(_name)					\
+		.id = {							\
+			((_jedec_id) >> 16) & 0xff,			\
+			((_jedec_id) >> 8) & 0xff,			\
+			(_jedec_id) & 0xff,				\
+			((_ext_id) >> 8) & 0xff,			\
+			(_ext_id) & 0xff,				\
+			},						\
+		.id_len = (!(_jedec_id) ? 0 : (3 + ((_ext_id) ? 2 : 0))),	\
+		.sector_size = (_sector_size),				\
+		.n_sectors = (_n_sectors),				\
+		.page_size = 256,					\
+		.flags = (_flags),
+
+#define INFO6(_name, _jedec_id, _ext_id, _sector_size, _n_sectors, _flags)	\
+		INFO_NAME(_name)					\
+		.id = {							\
+			((_jedec_id) >> 16) & 0xff,			\
+			((_jedec_id) >> 8) & 0xff,			\
+			(_jedec_id) & 0xff,				\
+			((_ext_id) >> 16) & 0xff,			\
+			((_ext_id) >> 8) & 0xff,			\
+			(_ext_id) & 0xff,				\
+			},						\
+		.id_len = 6,						\
+		.sector_size = (_sector_size),				\
+		.n_sectors = (_n_sectors),				\
+		.page_size = 256,					\
+		.flags = (_flags),
+
+/* NOTE: double check command sets and memory organization when you add
+ * more nor chips.  This current list focusses on newer chips, which
+ * have been converging on command sets which including JEDEC ID.
+ *
+ * All newly added entries should describe *hardware* and should use SECT_4K
+ * (or SECT_4K_PMC) if hardware supports erasing 4 KiB sectors. For usage
+ * scenarios excluding small sectors there is config option that can be
+ * disabled: CONFIG_SPI_FLASH_USE_4K_SECTORS.
+ * For historical (and compatibility) reasons (before we got above config) some
+ * old entries may be missing 4K flag.
+ */
+const struct flash_info spi_nor_ids[] = {
+#ifdef CONFIG_SPI_FLASH_ATMEL		/* ATMEL */
+	/* Atmel -- some are (confusingly) marketed as "DataFlash" */
+	{ INFO("at26df321",	0x1f4700, 0, 64 * 1024, 64, SECT_4K) },
+	{ INFO("at25df321a",	0x1f4701, 0, 64 * 1024, 64, SECT_4K) },
+
+	{ INFO("at45db011d",	0x1f2200, 0, 64 * 1024,   4, SECT_4K) },
+	{ INFO("at45db021d",	0x1f2300, 0, 64 * 1024,   8, SECT_4K) },
+	{ INFO("at45db041d",	0x1f2400, 0, 64 * 1024,   8, SECT_4K) },
+	{ INFO("at45db081d",	0x1f2500, 0, 64 * 1024,  16, SECT_4K) },
+	{ INFO("at45db161d",	0x1f2600, 0, 64 * 1024,  32, SECT_4K) },
+	{ INFO("at45db321d",	0x1f2700, 0, 64 * 1024,  64, SECT_4K) },
+	{ INFO("at45db641d",	0x1f2800, 0, 64 * 1024, 128, SECT_4K) },
+	{ INFO("at25sl321",	0x1f4216, 0, 64 * 1024,  64, SECT_4K) },
+	{ INFO("at26df081a", 	0x1f4501, 0, 64 * 1024,  16, SECT_4K) },
+#endif
+#ifdef CONFIG_SPI_FLASH_EON		/* EON */
+	/* EON -- en25xxx */
+	{ INFO("en25q32b",   0x1c3016, 0, 64 * 1024,   64, 0) },
+	{ INFO("en25q64",    0x1c3017, 0, 64 * 1024,  128, SECT_4K) },
+	{ INFO("en25qh128",  0x1c7018, 0, 64 * 1024,  256, 0) },
+	{ INFO("en25s64",    0x1c3817, 0, 64 * 1024,  128, SECT_4K) },
+#endif
+#ifdef CONFIG_SPI_FLASH_GIGADEVICE	/* GIGADEVICE */
+	/* GigaDevice */
+	{
+		INFO("gd25q16", 0xc84015, 0, 64 * 1024,  32,
+			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
+			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+	},
+	{
+		INFO("gd25q32", 0xc84016, 0, 64 * 1024,  64,
+			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
+			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+	},
+	{
+		INFO("gd25lq32", 0xc86016, 0, 64 * 1024, 64,
+			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
+			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+	},
+	{
+		INFO("gd25q64", 0xc84017, 0, 64 * 1024, 128,
+			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
+			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+	},
+	{
+		INFO("gd25q128", 0xc84018, 0, 64 * 1024, 256,
+			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
+			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+	},
+	{
+		INFO("gd25lq128", 0xc86018, 0, 64 * 1024, 256,
+			SECT_4K | SPI_NOR_DUAL_READ |
+			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+	},
+#endif
+#ifdef CONFIG_SPI_FLASH_ISSI		/* ISSI */
+	/* ISSI */
+	{ INFO("is25lq040b", 0x9d4013, 0, 64 * 1024,   8,
+			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+	{ INFO("is25lp032",	0x9d6016, 0, 64 * 1024,  64, 0) },
+	{ INFO("is25lp064",	0x9d6017, 0, 64 * 1024, 128, 0) },
+	{ INFO("is25lp128",  0x9d6018, 0, 64 * 1024, 256,
+			SECT_4K | SPI_NOR_DUAL_READ) },
+	{ INFO("is25lp256",  0x9d6019, 0, 64 * 1024, 512,
+			SECT_4K | SPI_NOR_DUAL_READ) },
+	{ INFO("is25wp032",  0x9d7016, 0, 64 * 1024,  64,
+			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+	{ INFO("is25wp064",  0x9d7017, 0, 64 * 1024, 128,
+			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+	{ INFO("is25wp128",  0x9d7018, 0, 64 * 1024, 256,
+			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+	{ INFO("is25wp256",  0x9d7019, 0, 64 * 1024, 512,
+			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+#endif
+#ifdef CONFIG_SPI_FLASH_MACRONIX	/* MACRONIX */
+	/* Macronix */
+	{ INFO("mx25l2005a",  0xc22012, 0, 64 * 1024,   4, SECT_4K) },
+	{ INFO("mx25l4005a",  0xc22013, 0, 64 * 1024,   8, SECT_4K) },
+	{ INFO("mx25l8005",   0xc22014, 0, 64 * 1024,  16, 0) },
+	{ INFO("mx25l1606e",  0xc22015, 0, 64 * 1024,  32, SECT_4K) },
+	{ INFO("mx25l3205d",  0xc22016, 0, 64 * 1024,  64, SECT_4K) },
+	{ INFO("mx25l6405d",  0xc22017, 0, 64 * 1024, 128, SECT_4K) },
+	{ INFO("mx25u2033e",  0xc22532, 0, 64 * 1024,   4, SECT_4K) },
+	{ INFO("mx25u1635e",  0xc22535, 0, 64 * 1024,  32, SECT_4K) },
+	{ INFO("mx25u6435f",  0xc22537, 0, 64 * 1024, 128, SECT_4K) },
+	{ INFO("mx25l12805d", 0xc22018, 0, 64 * 1024, 256, 0) },
+	{ INFO("mx25l12855e", 0xc22618, 0, 64 * 1024, 256, 0) },
+	{ INFO("mx25l25635e", 0xc22019, 0, 64 * 1024, 512, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+	{ INFO("mx25u25635f", 0xc22539, 0, 64 * 1024, 512, SECT_4K | SPI_NOR_4B_OPCODES) },
+	{ INFO("mx25l25655e", 0xc22619, 0, 64 * 1024, 512, 0) },
+	{ INFO("mx66l51235l", 0xc2201a, 0, 64 * 1024, 1024, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
+	{ INFO("mx66u51235f", 0xc2253a, 0, 64 * 1024, 1024, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
+	{ INFO("mx66u2g45g",  0xc2253c, 0, 64 * 1024, 4096, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
+	{ INFO("mx66l1g45g",  0xc2201b, 0, 64 * 1024, 2048, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+	{ INFO("mx25l1633e", 0xc22415, 0, 64 * 1024,   32, SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES | SECT_4K) },
+#endif
+
+#ifdef CONFIG_SPI_FLASH_STMICRO		/* STMICRO */
+	/* Micron */
+	{ INFO("n25q016a",	 0x20bb15, 0, 64 * 1024,   32, SECT_4K | SPI_NOR_QUAD_READ) },
+	{ INFO("n25q032",	 0x20ba16, 0, 64 * 1024,   64, SPI_NOR_QUAD_READ) },
+	{ INFO("n25q032a",	0x20bb16, 0, 64 * 1024,   64, SPI_NOR_QUAD_READ) },
+	{ INFO("n25q064",     0x20ba17, 0, 64 * 1024,  128, SECT_4K | SPI_NOR_QUAD_READ) },
+	{ INFO("n25q064a",    0x20bb17, 0, 64 * 1024,  128, SECT_4K | SPI_NOR_QUAD_READ) },
+	{ INFO("n25q128a11",  0x20bb18, 0, 64 * 1024,  256, SECT_4K | SPI_NOR_QUAD_READ) },
+	{ INFO("n25q128a13",  0x20ba18, 0, 64 * 1024,  256, SECT_4K | SPI_NOR_QUAD_READ) },
+	{ INFO6("mt25ql256a",    0x20ba19, 0x104400, 64 * 1024,  512, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES | USE_FSR) },
+	{ INFO("n25q256a",    0x20ba19, 0, 64 * 1024,  512, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | USE_FSR) },
+	{ INFO6("mt25qu256a",  0x20bb19, 0x104400, 64 * 1024,  512, SECT_4K | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES | USE_FSR) },
+	{ INFO("n25q256ax1",  0x20bb19, 0, 64 * 1024,  512, SECT_4K | SPI_NOR_QUAD_READ | USE_FSR) },
+	{ INFO6("mt25qu512a",  0x20bb20, 0x104400, 64 * 1024, 1024,
+		 SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES |
+		 USE_FSR) },
+	{ INFO("n25q512a",    0x20bb20, 0, 64 * 1024, 1024, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ) },
+	{ INFO6("mt25ql512a",  0x20ba20, 0x104400, 64 * 1024, 1024, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
+	{ INFO("n25q512ax3",  0x20ba20, 0, 64 * 1024, 1024, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ) },
+	{ INFO("n25q00",      0x20ba21, 0, 64 * 1024, 2048, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ | NO_CHIP_ERASE) },
+	{ INFO("n25q00a",     0x20bb21, 0, 64 * 1024, 2048, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ | NO_CHIP_ERASE) },
+	{ INFO("mt25qu02g",   0x20bb22, 0, 64 * 1024, 4096, SECT_4K | USE_FSR | SPI_NOR_QUAD_READ | NO_CHIP_ERASE) },
+	{ INFO("mt35xu512aba", 0x2c5b1a, 0,  128 * 1024,  512, USE_FSR | SPI_NOR_4B_OPCODES) },
+	{ INFO("mt35xu02g",  0x2c5b1c, 0, 128 * 1024,  2048, USE_FSR | SPI_NOR_4B_OPCODES) },
+#endif
+#ifdef CONFIG_SPI_FLASH_SPANSION	/* SPANSION */
+	/* Spansion/Cypress -- single (large) sector size only, at least
+	 * for the chips listed here (without boot sectors).
+	 */
+	{ INFO("s25sl032p",  0x010215, 0x4d00,  64 * 1024,  64, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+	{ INFO("s25sl064p",  0x010216, 0x4d00,  64 * 1024, 128, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+	{ INFO("s25fl256s0", 0x010219, 0x4d00, 256 * 1024, 128, USE_CLSR) },
+	{ INFO("s25fl256s1", 0x010219, 0x4d01,  64 * 1024, 512, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | USE_CLSR) },
+	{ INFO6("s25fl512s",  0x010220, 0x4d0081, 256 * 1024, 256, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | USE_CLSR) },
+	{ INFO("s25fl512s_256k",  0x010220, 0x4d00, 256 * 1024, 256, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | USE_CLSR) },
+	{ INFO("s25fl512s_64k",  0x010220, 0x4d01, 64 * 1024, 1024, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | USE_CLSR) },
+	{ INFO("s25fl512s_512k", 0x010220, 0x4f00, 256 * 1024, 256, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | USE_CLSR) },
+	{ INFO("s25sl12800", 0x012018, 0x0300, 256 * 1024,  64, 0) },
+	{ INFO("s25sl12801", 0x012018, 0x0301,  64 * 1024, 256, 0) },
+	{ INFO6("s25fl128s",  0x012018, 0x4d0180, 64 * 1024, 256, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | USE_CLSR) },
+	{ INFO("s25fl129p0", 0x012018, 0x4d00, 256 * 1024,  64, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | USE_CLSR) },
+	{ INFO("s25fl129p1", 0x012018, 0x4d01,  64 * 1024, 256, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | USE_CLSR) },
+	{ INFO("s25sl008a",  0x010213,      0,  64 * 1024,  16, 0) },
+	{ INFO("s25sl016a",  0x010214,      0,  64 * 1024,  32, 0) },
+	{ INFO("s25sl032a",  0x010215,      0,  64 * 1024,  64, 0) },
+	{ INFO("s25sl064a",  0x010216,      0,  64 * 1024, 128, 0) },
+	{ INFO("s25fl116k",  0x014015,      0,  64 * 1024,  32, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+	{ INFO("s25fl164k",  0x014017,      0,  64 * 1024, 128, SECT_4K) },
+	{ INFO("s25fl208k",  0x014014,      0,  64 * 1024,  16, SECT_4K | SPI_NOR_DUAL_READ) },
+	{ INFO("s25fl064l",  0x016017,      0,  64 * 1024, 128, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
+	{ INFO("s25fl128l",  0x016018,      0,  64 * 1024, 256, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
+#endif
+#ifdef CONFIG_SPI_FLASH_SST		/* SST */
+	/* SST -- large erase sizes are "overlays", "sectors" are 4K */
+	{ INFO("sst25vf040b", 0xbf258d, 0, 64 * 1024,  8, SECT_4K | SST_WRITE) },
+	{ INFO("sst25vf080b", 0xbf258e, 0, 64 * 1024, 16, SECT_4K | SST_WRITE) },
+	{ INFO("sst25vf016b", 0xbf2541, 0, 64 * 1024, 32, SECT_4K | SST_WRITE) },
+	{ INFO("sst25vf032b", 0xbf254a, 0, 64 * 1024, 64, SECT_4K | SST_WRITE) },
+	{ INFO("sst25vf064c", 0xbf254b, 0, 64 * 1024, 128, SECT_4K) },
+	{ INFO("sst25wf512",  0xbf2501, 0, 64 * 1024,  1, SECT_4K | SST_WRITE) },
+	{ INFO("sst25wf010",  0xbf2502, 0, 64 * 1024,  2, SECT_4K | SST_WRITE) },
+	{ INFO("sst25wf020",  0xbf2503, 0, 64 * 1024,  4, SECT_4K | SST_WRITE) },
+	{ INFO("sst25wf020a", 0x621612, 0, 64 * 1024,  4, SECT_4K) },
+	{ INFO("sst25wf040b", 0x621613, 0, 64 * 1024,  8, SECT_4K) },
+	{ INFO("sst25wf040",  0xbf2504, 0, 64 * 1024,  8, SECT_4K | SST_WRITE) },
+	{ INFO("sst25wf080",  0xbf2505, 0, 64 * 1024, 16, SECT_4K | SST_WRITE) },
+	{ INFO("sst26vf064b", 0xbf2643, 0, 64 * 1024, 128, SECT_4K | SPI_NOR_HAS_SST26LOCK | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+	{ INFO("sst26wf016",  0xbf2651, 0, 64 * 1024,  32, SECT_4K | SPI_NOR_HAS_SST26LOCK) },
+	{ INFO("sst26wf032",  0xbf2622, 0, 64 * 1024,  64, SECT_4K | SPI_NOR_HAS_SST26LOCK) },
+	{ INFO("sst26wf064",  0xbf2643, 0, 64 * 1024, 128, SECT_4K | SPI_NOR_HAS_SST26LOCK) },
+#endif
+#ifdef CONFIG_SPI_FLASH_STMICRO		/* STMICRO */
+	/* ST Microelectronics -- newer production may have feature updates */
+	{ INFO("m25p10",  0x202011,  0,  32 * 1024,   4, 0) },
+	{ INFO("m25p20",  0x202012,  0,  64 * 1024,   4, 0) },
+	{ INFO("m25p40",  0x202013,  0,  64 * 1024,   8, 0) },
+	{ INFO("m25p80",  0x202014,  0,  64 * 1024,  16, 0) },
+	{ INFO("m25p16",  0x202015,  0,  64 * 1024,  32, 0) },
+	{ INFO("m25p32",  0x202016,  0,  64 * 1024,  64, 0) },
+	{ INFO("m25p64",  0x202017,  0,  64 * 1024, 128, 0) },
+	{ INFO("m25p128", 0x202018,  0, 256 * 1024,  64, 0) },
+	{ INFO("m25pe16", 0x208015,  0, 64 * 1024, 32, SECT_4K) },
+	{ INFO("m25px16",    0x207115,  0, 64 * 1024, 32, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+	{ INFO("m25px64",    0x207117,  0, 64 * 1024, 128, 0) },
+#endif
+#ifdef CONFIG_SPI_FLASH_WINBOND		/* WINBOND */
+	/* Winbond -- w25x "blocks" are 64K, "sectors" are 4KiB */
+	{ INFO("w25p80", 0xef2014, 0x0,	64 * 1024,    16, 0) },
+	{ INFO("w25p16", 0xef2015, 0x0,	64 * 1024,    32, 0) },
+	{ INFO("w25p32", 0xef2016, 0x0,	64 * 1024,    64, 0) },
+	{ INFO("w25x05", 0xef3010, 0, 64 * 1024,  1,  SECT_4K) },
+	{ INFO("w25x40", 0xef3013, 0, 64 * 1024,  8,  SECT_4K) },
+	{ INFO("w25x16", 0xef3015, 0, 64 * 1024,  32, SECT_4K) },
+	{
+		INFO("w25q16dw", 0xef6015, 0, 64 * 1024,  32,
+			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
+			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+	},
+	{ INFO("w25x32", 0xef3016, 0, 64 * 1024,  64, SECT_4K) },
+	{ INFO("w25q20cl", 0xef4012, 0, 64 * 1024,  4, SECT_4K) },
+	{ INFO("w25q20bw", 0xef5012, 0, 64 * 1024,  4, SECT_4K) },
+	{ INFO("w25q20ew", 0xef6012, 0, 64 * 1024,  4, SECT_4K) },
+	{ INFO("w25q32", 0xef4016, 0, 64 * 1024,  64, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+	{
+		INFO("w25q32dw", 0xef6016, 0, 64 * 1024,  64,
+			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
+			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+	},
+	{
+		INFO("w25q32jv", 0xef7016, 0, 64 * 1024,  64,
+			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
+			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+	},
+	{ INFO("w25x64", 0xef3017, 0, 64 * 1024, 128, SECT_4K) },
+	{
+		INFO("w25q64dw", 0xef6017, 0, 64 * 1024, 128,
+			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
+			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+	},
+	{
+		INFO("w25q64jv", 0xef7017, 0, 64 * 1024, 128,
+			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
+			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+	},
+	{
+		INFO("w25q128fw", 0xef6018, 0, 64 * 1024, 256,
+			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
+			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+	},
+	{
+		INFO("w25q128jv", 0xef7018, 0, 64 * 1024, 256,
+			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
+			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+	},
+	{
+		INFO("w25q256fw", 0xef6019, 0, 64 * 1024, 512,
+			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
+			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+	},
+	{
+		INFO("w25q256jw", 0xef7019, 0, 64 * 1024, 512,
+			SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
+			SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+	},
+	{ INFO("w25q80", 0xef5014, 0, 64 * 1024,  16, SECT_4K) },
+	{ INFO("w25q80bl", 0xef4014, 0, 64 * 1024,  16, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+	{ INFO("w25q16cl", 0xef4015, 0, 64 * 1024,  32, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+	{ INFO("w25q64cv", 0xef4017, 0, 64 * 1024,  128, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+	{ INFO("w25q128", 0xef4018, 0, 64 * 1024, 256, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+	{ INFO("w25q256", 0xef4019, 0, 64 * 1024, 512, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+#endif
+#ifdef CONFIG_SPI_FLASH_XMC
+	/* XMC (Wuhan Xinxin Semiconductor Manufacturing Corp.) */
+	{ INFO("XM25QH64A", 0x207017, 0, 64 * 1024, 128, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+	{ INFO("XM25QH128A", 0x207018, 0, 64 * 1024, 256, SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+#endif
+	{ },
+};

source/bootloader/u-boot-2020.01/drivers/mtd/spi/spi-nor-tiny.c

@@ -0,0 +1,804 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Based on m25p80.c, by Mike Lavender (mike@steroidmicros.com), with
+ * influence from lart.c (Abraham Van Der Merwe) and mtd_dataflash.c
+ *
+ * Copyright (C) 2005, Intec Automation Inc.
+ * Copyright (C) 2014, Freescale Semiconductor, Inc.
+ *
+ * Synced from Linux v4.19
+ */
+
+#include <common.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/log2.h>
+#include <linux/math64.h>
+#include <linux/sizes.h>
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/spi-nor.h>
+#include <spi-mem.h>
+#include <spi.h>
+
+#include "sf_internal.h"
+
+/* Define max times to check status register before we give up. */
+
+/*
+ * For everything but full-chip erase; probably could be much smaller, but kept
+ * around for safety for now
+ */
+
+#define HZ					CONFIG_SYS_HZ
+
+#define DEFAULT_READY_WAIT_JIFFIES		(40UL * HZ)
+
+static int spi_nor_read_write_reg(struct spi_nor *nor, struct spi_mem_op
+		*op, void *buf)
+{
+	if (op->data.dir == SPI_MEM_DATA_IN)
+		op->data.buf.in = buf;
+	else
+		op->data.buf.out = buf;
+	return spi_mem_exec_op(nor->spi, op);
+}
+
+static int spi_nor_read_reg(struct spi_nor *nor, u8 code, u8 *val, int len)
+{
+	struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(code, 1),
+					  SPI_MEM_OP_NO_ADDR,
+					  SPI_MEM_OP_NO_DUMMY,
+					  SPI_MEM_OP_DATA_IN(len, NULL, 1));
+	int ret;
+
+	ret = spi_nor_read_write_reg(nor, &op, val);
+	if (ret < 0)
+		dev_dbg(&flash->spimem->spi->dev, "error %d reading %x\n", ret,
+			code);
+
+	return ret;
+}
+
+static int spi_nor_write_reg(struct spi_nor *nor, u8 opcode, u8 *buf, int len)
+{
+	struct spi_mem_op op = SPI_MEM_OP(SPI_MEM_OP_CMD(opcode, 1),
+					  SPI_MEM_OP_NO_ADDR,
+					  SPI_MEM_OP_NO_DUMMY,
+					  SPI_MEM_OP_DATA_OUT(len, NULL, 1));
+
+	return spi_nor_read_write_reg(nor, &op, buf);
+}
+
+static ssize_t spi_nor_read_data(struct spi_nor *nor, loff_t from, size_t len,
+				 u_char *buf)
+{
+	struct spi_mem_op op =
+			SPI_MEM_OP(SPI_MEM_OP_CMD(nor->read_opcode, 1),
+				   SPI_MEM_OP_ADDR(nor->addr_width, from, 1),
+				   SPI_MEM_OP_DUMMY(nor->read_dummy, 1),
+				   SPI_MEM_OP_DATA_IN(len, buf, 1));
+	size_t remaining = len;
+	int ret;
+
+	/* get transfer protocols. */
+	op.cmd.buswidth = spi_nor_get_protocol_inst_nbits(nor->read_proto);
+	op.addr.buswidth = spi_nor_get_protocol_addr_nbits(nor->read_proto);
+	op.dummy.buswidth = op.addr.buswidth;
+	op.data.buswidth = spi_nor_get_protocol_data_nbits(nor->read_proto);
+
+	/* convert the dummy cycles to the number of bytes */
+	op.dummy.nbytes = (nor->read_dummy * op.dummy.buswidth) / 8;
+
+	while (remaining) {
+		op.data.nbytes = remaining < UINT_MAX ? remaining : UINT_MAX;
+		ret = spi_mem_adjust_op_size(nor->spi, &op);
+		if (ret)
+			return ret;
+
+		ret = spi_mem_exec_op(nor->spi, &op);
+		if (ret)
+			return ret;
+
+		op.addr.val += op.data.nbytes;
+		remaining -= op.data.nbytes;
+		op.data.buf.in += op.data.nbytes;
+	}
+
+	return len;
+}
+
+#if defined(CONFIG_SPI_FLASH_SPANSION) || defined(CONFIG_SPI_FLASH_WINBOND)
+/*
+ * Read configuration register, returning its value in the
+ * location. Return the configuration register value.
+ * Returns negative if error occurred.
+ */
+static int read_cr(struct spi_nor *nor)
+{
+	int ret;
+	u8 val;
+
+	ret = spi_nor_read_reg(nor, SPINOR_OP_RDCR, &val, 1);
+	if (ret < 0) {
+		dev_dbg(nor->dev, "error %d reading CR\n", ret);
+		return ret;
+	}
+
+	return val;
+}
+#endif
+
+/*
+ * Write status register 1 byte
+ * Returns negative if error occurred.
+ */
+static inline int write_sr(struct spi_nor *nor, u8 val)
+{
+	nor->cmd_buf[0] = val;
+	return spi_nor_write_reg(nor, SPINOR_OP_WRSR, nor->cmd_buf, 1);
+}
+
+/*
+ * Set write enable latch with Write Enable command.
+ * Returns negative if error occurred.
+ */
+static inline int write_enable(struct spi_nor *nor)
+{
+	return spi_nor_write_reg(nor, SPINOR_OP_WREN, NULL, 0);
+}
+
+/*
+ * Send write disable instruction to the chip.
+ */
+static inline int write_disable(struct spi_nor *nor)
+{
+	return spi_nor_write_reg(nor, SPINOR_OP_WRDI, NULL, 0);
+}
+
+static inline struct spi_nor *mtd_to_spi_nor(struct mtd_info *mtd)
+{
+	return mtd->priv;
+}
+
+static u8 spi_nor_convert_opcode(u8 opcode, const u8 table[][2], size_t size)
+{
+	size_t i;
+
+	for (i = 0; i < size; i++)
+		if (table[i][0] == opcode)
+			return table[i][1];
+
+	/* No conversion found, keep input op code. */
+	return opcode;
+}
+
+static inline u8 spi_nor_convert_3to4_read(u8 opcode)
+{
+	static const u8 spi_nor_3to4_read[][2] = {
+		{ SPINOR_OP_READ,	SPINOR_OP_READ_4B },
+		{ SPINOR_OP_READ_FAST,	SPINOR_OP_READ_FAST_4B },
+		{ SPINOR_OP_READ_1_1_2,	SPINOR_OP_READ_1_1_2_4B },
+		{ SPINOR_OP_READ_1_2_2,	SPINOR_OP_READ_1_2_2_4B },
+		{ SPINOR_OP_READ_1_1_4,	SPINOR_OP_READ_1_1_4_4B },
+		{ SPINOR_OP_READ_1_4_4,	SPINOR_OP_READ_1_4_4_4B },
+	};
+
+	return spi_nor_convert_opcode(opcode, spi_nor_3to4_read,
+				      ARRAY_SIZE(spi_nor_3to4_read));
+}
+
+static void spi_nor_set_4byte_opcodes(struct spi_nor *nor,
+				      const struct flash_info *info)
+{
+	nor->read_opcode = spi_nor_convert_3to4_read(nor->read_opcode);
+}
+
+/* Enable/disable 4-byte addressing mode. */
+static inline int set_4byte(struct spi_nor *nor, const struct flash_info *info,
+			    int enable)
+{
+	int status;
+	bool need_wren = false;
+	u8 cmd;
+
+	switch (JEDEC_MFR(info)) {
+	case SNOR_MFR_ST:
+	case SNOR_MFR_MICRON:
+		/* Some Micron need WREN command; all will accept it */
+		need_wren = true;
+	case SNOR_MFR_MACRONIX:
+	case SNOR_MFR_WINBOND:
+		if (need_wren)
+			write_enable(nor);
+
+		cmd = enable ? SPINOR_OP_EN4B : SPINOR_OP_EX4B;
+		status = spi_nor_write_reg(nor, cmd, NULL, 0);
+		if (need_wren)
+			write_disable(nor);
+
+		if (!status && !enable &&
+		    JEDEC_MFR(info) == SNOR_MFR_WINBOND) {
+			/*
+			 * On Winbond W25Q256FV, leaving 4byte mode causes
+			 * the Extended Address Register to be set to 1, so all
+			 * 3-byte-address reads come from the second 16M.
+			 * We must clear the register to enable normal behavior.
+			 */
+			write_enable(nor);
+			nor->cmd_buf[0] = 0;
+			spi_nor_write_reg(nor, SPINOR_OP_WREAR,
+					  nor->cmd_buf, 1);
+			write_disable(nor);
+		}
+
+		return status;
+	default:
+		/* Spansion style */
+		nor->cmd_buf[0] = enable << 7;
+		return spi_nor_write_reg(nor, SPINOR_OP_BRWR, nor->cmd_buf, 1);
+	}
+}
+
+#if defined(CONFIG_SPI_FLASH_SPANSION) ||	\
+	defined(CONFIG_SPI_FLASH_WINBOND) ||	\
+	defined(CONFIG_SPI_FLASH_MACRONIX)
+/*
+ * Read the status register, returning its value in the location
+ * Return the status register value.
+ * Returns negative if error occurred.
+ */
+static int read_sr(struct spi_nor *nor)
+{
+	int ret;
+	u8 val;
+
+	ret = spi_nor_read_reg(nor, SPINOR_OP_RDSR, &val, 1);
+	if (ret < 0) {
+		pr_debug("error %d reading SR\n", (int)ret);
+		return ret;
+	}
+
+	return val;
+}
+
+/*
+ * Read the flag status register, returning its value in the location
+ * Return the status register value.
+ * Returns negative if error occurred.
+ */
+static int read_fsr(struct spi_nor *nor)
+{
+	int ret;
+	u8 val;
+
+	ret = spi_nor_read_reg(nor, SPINOR_OP_RDFSR, &val, 1);
+	if (ret < 0) {
+		pr_debug("error %d reading FSR\n", ret);
+		return ret;
+	}
+
+	return val;
+}
+
+static int spi_nor_sr_ready(struct spi_nor *nor)
+{
+	int sr = read_sr(nor);
+
+	if (sr < 0)
+		return sr;
+
+	return !(sr & SR_WIP);
+}
+
+static int spi_nor_fsr_ready(struct spi_nor *nor)
+{
+	int fsr = read_fsr(nor);
+
+	if (fsr < 0)
+		return fsr;
+	return fsr & FSR_READY;
+}
+
+static int spi_nor_ready(struct spi_nor *nor)
+{
+	int sr, fsr;
+
+	sr = spi_nor_sr_ready(nor);
+	if (sr < 0)
+		return sr;
+	fsr = nor->flags & SNOR_F_USE_FSR ? spi_nor_fsr_ready(nor) : 1;
+	if (fsr < 0)
+		return fsr;
+	return sr && fsr;
+}
+
+/*
+ * Service routine to read status register until ready, or timeout occurs.
+ * Returns non-zero if error.
+ */
+static int spi_nor_wait_till_ready_with_timeout(struct spi_nor *nor,
+						unsigned long timeout)
+{
+	unsigned long timebase;
+	int ret;
+
+	timebase = get_timer(0);
+
+	while (get_timer(timebase) < timeout) {
+		ret = spi_nor_ready(nor);
+		if (ret < 0)
+			return ret;
+		if (ret)
+			return 0;
+	}
+
+	dev_err(nor->dev, "flash operation timed out\n");
+
+	return -ETIMEDOUT;
+}
+
+static int spi_nor_wait_till_ready(struct spi_nor *nor)
+{
+	return spi_nor_wait_till_ready_with_timeout(nor,
+						    DEFAULT_READY_WAIT_JIFFIES);
+}
+#endif /* CONFIG_SPI_FLASH_SPANSION */
+
+/*
+ * Erase an address range on the nor chip.  The address range may extend
+ * one or more erase sectors.  Return an error is there is a problem erasing.
+ */
+static int spi_nor_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+	return -ENOTSUPP;
+}
+
+static const struct flash_info *spi_nor_read_id(struct spi_nor *nor)
+{
+	int			tmp;
+	u8			id[SPI_NOR_MAX_ID_LEN];
+	const struct flash_info	*info;
+
+	tmp = spi_nor_read_reg(nor, SPINOR_OP_RDID, id, SPI_NOR_MAX_ID_LEN);
+	if (tmp < 0) {
+		dev_dbg(nor->dev, "error %d reading JEDEC ID\n", tmp);
+		return ERR_PTR(tmp);
+	}
+
+	info = spi_nor_ids;
+	for (; info->sector_size != 0; info++) {
+		if (info->id_len) {
+			if (!memcmp(info->id, id, info->id_len))
+				return info;
+		}
+	}
+	dev_dbg(nor->dev, "unrecognized JEDEC id bytes: %02x, %02x, %02x\n",
+		id[0], id[1], id[2]);
+	return ERR_PTR(-ENODEV);
+}
+
+static int spi_nor_read(struct mtd_info *mtd, loff_t from, size_t len,
+			size_t *retlen, u_char *buf)
+{
+	struct spi_nor *nor = mtd_to_spi_nor(mtd);
+	int ret;
+
+	dev_dbg(nor->dev, "from 0x%08x, len %zd\n", (u32)from, len);
+
+	while (len) {
+		loff_t addr = from;
+
+		ret = spi_nor_read_data(nor, addr, len, buf);
+		if (ret == 0) {
+			/* We shouldn't see 0-length reads */
+			ret = -EIO;
+			goto read_err;
+		}
+		if (ret < 0)
+			goto read_err;
+
+		*retlen += ret;
+		buf += ret;
+		from += ret;
+		len -= ret;
+	}
+	ret = 0;
+
+read_err:
+	return ret;
+}
+
+/*
+ * Write an address range to the nor chip.  Data must be written in
+ * FLASH_PAGESIZE chunks.  The address range may be any size provided
+ * it is within the physical boundaries.
+ */
+static int spi_nor_write(struct mtd_info *mtd, loff_t to, size_t len,
+			 size_t *retlen, const u_char *buf)
+{
+	return -ENOTSUPP;
+}
+
+#ifdef CONFIG_SPI_FLASH_MACRONIX
+/**
+ * macronix_quad_enable() - set QE bit in Status Register.
+ * @nor:	pointer to a 'struct spi_nor'
+ *
+ * Set the Quad Enable (QE) bit in the Status Register.
+ *
+ * bit 6 of the Status Register is the QE bit for Macronix like QSPI memories.
+ *
+ * Return: 0 on success, -errno otherwise.
+ */
+static int macronix_quad_enable(struct spi_nor *nor)
+{
+	int ret, val;
+
+	val = read_sr(nor);
+	if (val < 0)
+		return val;
+	if (val & SR_QUAD_EN_MX)
+		return 0;
+
+	write_enable(nor);
+
+	write_sr(nor, val | SR_QUAD_EN_MX);
+
+	ret = spi_nor_wait_till_ready(nor);
+	if (ret)
+		return ret;
+
+	ret = read_sr(nor);
+	if (!(ret > 0 && (ret & SR_QUAD_EN_MX))) {
+		dev_err(nor->dev, "Macronix Quad bit not set\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+#endif
+
+#if defined(CONFIG_SPI_FLASH_SPANSION) || defined(CONFIG_SPI_FLASH_WINBOND)
+/*
+ * Write status Register and configuration register with 2 bytes
+ * The first byte will be written to the status register, while the
+ * second byte will be written to the configuration register.
+ * Return negative if error occurred.
+ */
+static int write_sr_cr(struct spi_nor *nor, u8 *sr_cr)
+{
+	int ret;
+
+	write_enable(nor);
+
+	ret = spi_nor_write_reg(nor, SPINOR_OP_WRSR, sr_cr, 2);
+	if (ret < 0) {
+		dev_dbg(nor->dev,
+			"error while writing configuration register\n");
+		return -EINVAL;
+	}
+
+	ret = spi_nor_wait_till_ready(nor);
+	if (ret) {
+		dev_dbg(nor->dev,
+			"timeout while writing configuration register\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+/**
+ * spansion_read_cr_quad_enable() - set QE bit in Configuration Register.
+ * @nor:	pointer to a 'struct spi_nor'
+ *
+ * Set the Quad Enable (QE) bit in the Configuration Register.
+ * This function should be used with QSPI memories supporting the Read
+ * Configuration Register (35h) instruction.
+ *
+ * bit 1 of the Configuration Register is the QE bit for Spansion like QSPI
+ * memories.
+ *
+ * Return: 0 on success, -errno otherwise.
+ */
+static int spansion_read_cr_quad_enable(struct spi_nor *nor)
+{
+	u8 sr_cr[2];
+	int ret;
+
+	/* Check current Quad Enable bit value. */
+	ret = read_cr(nor);
+	if (ret < 0) {
+		dev_dbg(dev, "error while reading configuration register\n");
+		return -EINVAL;
+	}
+
+	if (ret & CR_QUAD_EN_SPAN)
+		return 0;
+
+	sr_cr[1] = ret | CR_QUAD_EN_SPAN;
+
+	/* Keep the current value of the Status Register. */
+	ret = read_sr(nor);
+	if (ret < 0) {
+		dev_dbg(dev, "error while reading status register\n");
+		return -EINVAL;
+	}
+	sr_cr[0] = ret;
+
+	ret = write_sr_cr(nor, sr_cr);
+	if (ret)
+		return ret;
+
+	/* Read back and check it. */
+	ret = read_cr(nor);
+	if (!(ret > 0 && (ret & CR_QUAD_EN_SPAN))) {
+		dev_dbg(nor->dev, "Spansion Quad bit not set\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+#endif /* CONFIG_SPI_FLASH_SPANSION */
+
+struct spi_nor_read_command {
+	u8			num_mode_clocks;
+	u8			num_wait_states;
+	u8			opcode;
+	enum spi_nor_protocol	proto;
+};
+
+enum spi_nor_read_command_index {
+	SNOR_CMD_READ,
+	SNOR_CMD_READ_FAST,
+
+	/* Quad SPI */
+	SNOR_CMD_READ_1_1_4,
+
+	SNOR_CMD_READ_MAX
+};
+
+struct spi_nor_flash_parameter {
+	struct spi_nor_hwcaps		hwcaps;
+	struct spi_nor_read_command	reads[SNOR_CMD_READ_MAX];
+};
+
+static void
+spi_nor_set_read_settings(struct spi_nor_read_command *read,
+			  u8 num_mode_clocks,
+			  u8 num_wait_states,
+			  u8 opcode,
+			  enum spi_nor_protocol proto)
+{
+	read->num_mode_clocks = num_mode_clocks;
+	read->num_wait_states = num_wait_states;
+	read->opcode = opcode;
+	read->proto = proto;
+}
+
+static int spi_nor_init_params(struct spi_nor *nor,
+			       const struct flash_info *info,
+			       struct spi_nor_flash_parameter *params)
+{
+	/* (Fast) Read settings. */
+	params->hwcaps.mask = SNOR_HWCAPS_READ;
+	spi_nor_set_read_settings(&params->reads[SNOR_CMD_READ],
+				  0, 0, SPINOR_OP_READ,
+				  SNOR_PROTO_1_1_1);
+
+	if (!(info->flags & SPI_NOR_NO_FR)) {
+		params->hwcaps.mask |= SNOR_HWCAPS_READ_FAST;
+		spi_nor_set_read_settings(&params->reads[SNOR_CMD_READ_FAST],
+					  0, 8, SPINOR_OP_READ_FAST,
+					  SNOR_PROTO_1_1_1);
+	}
+
+	if (info->flags & SPI_NOR_QUAD_READ) {
+		params->hwcaps.mask |= SNOR_HWCAPS_READ_1_1_4;
+		spi_nor_set_read_settings(&params->reads[SNOR_CMD_READ_1_1_4],
+					  0, 8, SPINOR_OP_READ_1_1_4,
+					  SNOR_PROTO_1_1_4);
+	}
+
+	return 0;
+}
+
+static int spi_nor_select_read(struct spi_nor *nor,
+			       const struct spi_nor_flash_parameter *params,
+			       u32 shared_hwcaps)
+{
+	int best_match = shared_hwcaps & SNOR_HWCAPS_READ_MASK;
+	int cmd;
+	const struct spi_nor_read_command *read;
+
+	if (best_match < 0)
+		return -EINVAL;
+
+	if (best_match & SNOR_HWCAPS_READ_1_1_4)
+		cmd = SNOR_CMD_READ_1_1_4;
+	else if (best_match & SNOR_HWCAPS_READ_FAST)
+		cmd = SNOR_CMD_READ_FAST;
+	else
+		cmd = SNOR_CMD_READ;
+
+	read = &params->reads[cmd];
+	nor->read_opcode = read->opcode;
+	nor->read_proto = read->proto;
+
+	/*
+	 * In the spi-nor framework, we don't need to make the difference
+	 * between mode clock cycles and wait state clock cycles.
+	 * Indeed, the value of the mode clock cycles is used by a QSPI
+	 * flash memory to know whether it should enter or leave its 0-4-4
+	 * (Continuous Read / XIP) mode.
+	 * eXecution In Place is out of the scope of the mtd sub-system.
+	 * Hence we choose to merge both mode and wait state clock cycles
+	 * into the so called dummy clock cycles.
+	 */
+	nor->read_dummy = read->num_mode_clocks + read->num_wait_states;
+	return 0;
+}
+
+static int spi_nor_setup(struct spi_nor *nor, const struct flash_info *info,
+			 const struct spi_nor_flash_parameter *params,
+			 const struct spi_nor_hwcaps *hwcaps)
+{
+	u32 shared_mask;
+	int err;
+
+	/*
+	 * Keep only the hardware capabilities supported by both the SPI
+	 * controller and the SPI flash memory.
+	 */
+	shared_mask = hwcaps->mask & params->hwcaps.mask;
+
+	/* Select the (Fast) Read command. */
+	err = spi_nor_select_read(nor, params, shared_mask);
+	if (err) {
+		dev_dbg(nor->dev,
+			"can't select read settings supported by both the SPI controller and memory.\n");
+		return err;
+	}
+
+	/* Enable Quad I/O if needed. */
+	if (spi_nor_get_protocol_width(nor->read_proto) == 4) {
+		switch (JEDEC_MFR(info)) {
+#ifdef CONFIG_SPI_FLASH_MACRONIX
+		case SNOR_MFR_MACRONIX:
+			err = macronix_quad_enable(nor);
+			break;
+#endif
+		case SNOR_MFR_ST:
+		case SNOR_MFR_MICRON:
+			break;
+
+		default:
+#if defined(CONFIG_SPI_FLASH_SPANSION) || defined(CONFIG_SPI_FLASH_WINBOND)
+			/* Kept only for backward compatibility purpose. */
+			err = spansion_read_cr_quad_enable(nor);
+#endif
+			break;
+		}
+	}
+	if (err) {
+		dev_dbg(nor->dev, "quad mode not supported\n");
+		return err;
+	}
+
+	return 0;
+}
+
+static int spi_nor_init(struct spi_nor *nor)
+{
+	if (nor->addr_width == 4 &&
+	    (JEDEC_MFR(nor->info) != SNOR_MFR_SPANSION) &&
+	    !(nor->info->flags & SPI_NOR_4B_OPCODES)) {
+		/*
+		 * If the RESET# pin isn't hooked up properly, or the system
+		 * otherwise doesn't perform a reset command in the boot
+		 * sequence, it's impossible to 100% protect against unexpected
+		 * reboots (e.g., crashes). Warn the user (or hopefully, system
+		 * designer) that this is bad.
+		 */
+		if (nor->flags & SNOR_F_BROKEN_RESET)
+			printf("enabling reset hack; may not recover from unexpected reboots\n");
+		set_4byte(nor, nor->info, 1);
+	}
+
+	return 0;
+}
+
+int spi_nor_scan(struct spi_nor *nor)
+{
+	struct spi_nor_flash_parameter params;
+	const struct flash_info *info = NULL;
+	struct mtd_info *mtd = &nor->mtd;
+	struct spi_nor_hwcaps hwcaps = {
+		.mask = SNOR_HWCAPS_READ |
+			SNOR_HWCAPS_READ_FAST
+	};
+	struct spi_slave *spi = nor->spi;
+	int ret;
+
+	/* Reset SPI protocol for all commands. */
+	nor->reg_proto = SNOR_PROTO_1_1_1;
+	nor->read_proto = SNOR_PROTO_1_1_1;
+	nor->write_proto = SNOR_PROTO_1_1_1;
+
+	if (spi->mode & SPI_RX_QUAD)
+		hwcaps.mask |= SNOR_HWCAPS_READ_1_1_4;
+
+	info = spi_nor_read_id(nor);
+	if (IS_ERR_OR_NULL(info))
+		return -ENOENT;
+	/* Parse the Serial Flash Discoverable Parameters table. */
+	ret = spi_nor_init_params(nor, info, &params);
+	if (ret)
+		return ret;
+
+	mtd->name = "spi-flash";
+	mtd->priv = nor;
+	mtd->type = MTD_NORFLASH;
+	mtd->writesize = 1;
+	mtd->flags = MTD_CAP_NORFLASH;
+	mtd->size = info->sector_size * info->n_sectors;
+	mtd->_erase = spi_nor_erase;
+	mtd->_read = spi_nor_read;
+	mtd->_write = spi_nor_write;
+
+	nor->size = mtd->size;
+
+	if (info->flags & USE_FSR)
+		nor->flags |= SNOR_F_USE_FSR;
+	if (info->flags & USE_CLSR)
+		nor->flags |= SNOR_F_USE_CLSR;
+
+	if (info->flags & SPI_NOR_NO_FR)
+		params.hwcaps.mask &= ~SNOR_HWCAPS_READ_FAST;
+
+	/*
+	 * Configure the SPI memory:
+	 * - select op codes for (Fast) Read, Page Program and Sector Erase.
+	 * - set the number of dummy cycles (mode cycles + wait states).
+	 * - set the SPI protocols for register and memory accesses.
+	 * - set the Quad Enable bit if needed (required by SPI x-y-4 protos).
+	 */
+	ret = spi_nor_setup(nor, info, &params, &hwcaps);
+	if (ret)
+		return ret;
+
+	if (nor->addr_width) {
+		/* already configured from SFDP */
+	} else if (info->addr_width) {
+		nor->addr_width = info->addr_width;
+	} else if (mtd->size > 0x1000000) {
+		/* enable 4-byte addressing if the device exceeds 16MiB */
+		nor->addr_width = 4;
+		if (JEDEC_MFR(info) == SNOR_MFR_SPANSION ||
+		    info->flags & SPI_NOR_4B_OPCODES)
+			spi_nor_set_4byte_opcodes(nor, info);
+	} else {
+		nor->addr_width = 3;
+	}
+
+	if (nor->addr_width > SPI_NOR_MAX_ADDR_WIDTH) {
+		dev_dbg(dev, "address width is too large: %u\n",
+			nor->addr_width);
+		return -EINVAL;
+	}
+
+	/* Send all the required SPI flash commands to initialize device */
+	nor->info = info;
+	ret = spi_nor_init(nor);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+/* U-Boot specific functions, need to extend MTD to support these */
+int spi_flash_cmd_get_sw_write_prot(struct spi_nor *nor)
+{
+	return -ENOTSUPP;
+}