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path: root/drivers/mtd/spi-nor/winbond.c
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Diffstat (limited to 'drivers/mtd/spi-nor/winbond.c')
-rw-r--r--drivers/mtd/spi-nor/winbond.c249
1 files changed, 249 insertions, 0 deletions
diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c
new file mode 100644
index 0000000000..cd99c9a1c5
--- /dev/null
+++ b/drivers/mtd/spi-nor/winbond.c
@@ -0,0 +1,249 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2005, Intec Automation Inc.
+ * Copyright (C) 2014, Freescale Semiconductor, Inc.
+ */
+
+#include <linux/mtd/spi-nor.h>
+
+#include "core.h"
+
+#define WINBOND_NOR_OP_RDEAR 0xc8 /* Read Extended Address Register */
+#define WINBOND_NOR_OP_WREAR 0xc5 /* Write Extended Address Register */
+
+#define WINBOND_NOR_WREAR_OP(buf) \
+ SPI_MEM_OP(SPI_MEM_OP_CMD(WINBOND_NOR_OP_WREAR, 0), \
+ SPI_MEM_OP_NO_ADDR, \
+ SPI_MEM_OP_NO_DUMMY, \
+ SPI_MEM_OP_DATA_OUT(1, buf, 0))
+
+static int
+w25q256_post_bfpt_fixups(struct spi_nor *nor,
+ const struct sfdp_parameter_header *bfpt_header,
+ const struct sfdp_bfpt *bfpt)
+{
+ /*
+ * W25Q256JV supports 4B opcodes but W25Q256FV does not.
+ * Unfortunately, Winbond has re-used the same JEDEC ID for both
+ * variants which prevents us from defining a new entry in the parts
+ * table.
+ * To differentiate between W25Q256JV and W25Q256FV check SFDP header
+ * version: only JV has JESD216A compliant structure (version 5).
+ */
+ if (bfpt_header->major == SFDP_JESD216_MAJOR &&
+ bfpt_header->minor == SFDP_JESD216A_MINOR)
+ nor->flags |= SNOR_F_4B_OPCODES;
+
+ return 0;
+}
+
+static const struct spi_nor_fixups w25q256_fixups = {
+ .post_bfpt = w25q256_post_bfpt_fixups,
+};
+
+static const struct flash_info winbond_nor_parts[] = {
+ /* Winbond -- w25x "blocks" are 64K, "sectors" are 4KiB */
+ { "w25x05", INFO(0xef3010, 0, 64 * 1024, 1)
+ NO_SFDP_FLAGS(SECT_4K) },
+ { "w25x10", INFO(0xef3011, 0, 64 * 1024, 2)
+ NO_SFDP_FLAGS(SECT_4K) },
+ { "w25x20", INFO(0xef3012, 0, 64 * 1024, 4)
+ NO_SFDP_FLAGS(SECT_4K) },
+ { "w25x40", INFO(0xef3013, 0, 64 * 1024, 8)
+ NO_SFDP_FLAGS(SECT_4K) },
+ { "w25x80", INFO(0xef3014, 0, 64 * 1024, 16)
+ NO_SFDP_FLAGS(SECT_4K) },
+ { "w25x16", INFO(0xef3015, 0, 64 * 1024, 32)
+ NO_SFDP_FLAGS(SECT_4K) },
+ { "w25q16dw", INFO(0xef6015, 0, 64 * 1024, 32)
+ FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+ NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
+ SPI_NOR_QUAD_READ) },
+ { "w25x32", INFO(0xef3016, 0, 64 * 1024, 64)
+ NO_SFDP_FLAGS(SECT_4K) },
+ { "w25q16jv-im/jm", INFO(0xef7015, 0, 64 * 1024, 32)
+ FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+ NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
+ SPI_NOR_QUAD_READ) },
+ { "w25q20cl", INFO(0xef4012, 0, 64 * 1024, 4)
+ NO_SFDP_FLAGS(SECT_4K) },
+ { "w25q20bw", INFO(0xef5012, 0, 64 * 1024, 4)
+ NO_SFDP_FLAGS(SECT_4K) },
+ { "w25q20ew", INFO(0xef6012, 0, 64 * 1024, 4)
+ NO_SFDP_FLAGS(SECT_4K) },
+ { "w25q32", INFO(0xef4016, 0, 64 * 1024, 64)
+ NO_SFDP_FLAGS(SECT_4K) },
+ { "w25q32dw", INFO(0xef6016, 0, 64 * 1024, 64)
+ FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+ NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)
+ OTP_INFO(256, 3, 0x1000, 0x1000) },
+ { "w25q32jv", INFO(0xef7016, 0, 64 * 1024, 64)
+ FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+ NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
+ SPI_NOR_QUAD_READ) },
+ { "w25q32jwm", INFO(0xef8016, 0, 64 * 1024, 64)
+ FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+ NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)
+ OTP_INFO(256, 3, 0x1000, 0x1000) },
+ { "w25q64jwm", INFO(0xef8017, 0, 64 * 1024, 128)
+ FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+ NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
+ SPI_NOR_QUAD_READ) },
+ { "w25q128jwm", INFO(0xef8018, 0, 64 * 1024, 256)
+ FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+ NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
+ SPI_NOR_QUAD_READ) },
+ { "w25q256jwm", INFO(0xef8019, 0, 64 * 1024, 512)
+ FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+ NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
+ SPI_NOR_QUAD_READ) },
+ { "w25x64", INFO(0xef3017, 0, 64 * 1024, 128)
+ NO_SFDP_FLAGS(SECT_4K) },
+ { "w25q64", INFO(0xef4017, 0, 64 * 1024, 128)
+ NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
+ SPI_NOR_QUAD_READ) },
+ { "w25q64dw", INFO(0xef6017, 0, 64 * 1024, 128)
+ FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+ NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
+ SPI_NOR_QUAD_READ) },
+ { "w25q64jvm", INFO(0xef7017, 0, 64 * 1024, 128)
+ NO_SFDP_FLAGS(SECT_4K) },
+ { "w25q128fw", INFO(0xef6018, 0, 64 * 1024, 256)
+ FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+ NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
+ SPI_NOR_QUAD_READ) },
+ { "w25q128jv", INFO(0xef7018, 0, 64 * 1024, 256)
+ FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB)
+ NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
+ SPI_NOR_QUAD_READ) },
+ { "w25q80", INFO(0xef5014, 0, 64 * 1024, 16)
+ NO_SFDP_FLAGS(SECT_4K) },
+ { "w25q80bl", INFO(0xef4014, 0, 64 * 1024, 16)
+ NO_SFDP_FLAGS(SECT_4K) },
+ { "w25q128", INFO(0xef4018, 0, 0, 0)
+ PARSE_SFDP
+ FLAGS(SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB) },
+ { "w25q256", INFO(0xef4019, 0, 64 * 1024, 512)
+ NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)
+ .fixups = &w25q256_fixups },
+ { "w25q256jvm", INFO(0xef7019, 0, 64 * 1024, 512)
+ PARSE_SFDP },
+ { "w25q256jw", INFO(0xef6019, 0, 64 * 1024, 512)
+ NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
+ SPI_NOR_QUAD_READ) },
+ { "w25m512jv", INFO(0xef7119, 0, 64 * 1024, 1024)
+ NO_SFDP_FLAGS(SECT_4K | SPI_NOR_QUAD_READ |
+ SPI_NOR_DUAL_READ) },
+ { "w25q512nwq", INFO(0xef6020, 0, 0, 0)
+ PARSE_SFDP
+ OTP_INFO(256, 3, 0x1000, 0x1000) },
+ { "w25q512nwm", INFO(0xef8020, 0, 64 * 1024, 1024)
+ PARSE_SFDP
+ OTP_INFO(256, 3, 0x1000, 0x1000) },
+ { "w25q512jvq", INFO(0xef4020, 0, 64 * 1024, 1024)
+ NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ |
+ SPI_NOR_QUAD_READ) },
+};
+
+/**
+ * winbond_nor_write_ear() - Write Extended Address Register.
+ * @nor: pointer to 'struct spi_nor'.
+ * @ear: value to write to the Extended Address Register.
+ *
+ * Return: 0 on success, -errno otherwise.
+ */
+static int winbond_nor_write_ear(struct spi_nor *nor, u8 ear)
+{
+ int ret;
+
+ nor->bouncebuf[0] = ear;
+
+ if (nor->spimem) {
+ struct spi_mem_op op = WINBOND_NOR_WREAR_OP(nor->bouncebuf);
+
+ spi_nor_spimem_setup_op(nor, &op, nor->reg_proto);
+
+ ret = spi_mem_exec_op(nor->spimem, &op);
+ } else {
+ ret = spi_nor_controller_ops_write_reg(nor,
+ WINBOND_NOR_OP_WREAR,
+ nor->bouncebuf, 1);
+ }
+
+ if (ret)
+ dev_dbg(nor->dev, "error %d writing EAR\n", ret);
+
+ return ret;
+}
+
+/**
+ * winbond_nor_set_4byte_addr_mode() - Set 4-byte address mode for Winbond
+ * flashes.
+ * @nor: pointer to 'struct spi_nor'.
+ * @enable: true to enter the 4-byte address mode, false to exit the 4-byte
+ * address mode.
+ *
+ * Return: 0 on success, -errno otherwise.
+ */
+static int winbond_nor_set_4byte_addr_mode(struct spi_nor *nor, bool enable)
+{
+ int ret;
+
+ ret = spi_nor_set_4byte_addr_mode_en4b_ex4b(nor, enable);
+ if (ret || enable)
+ return ret;
+
+ /*
+ * 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.
+ */
+ ret = spi_nor_write_enable(nor);
+ if (ret)
+ return ret;
+
+ ret = winbond_nor_write_ear(nor, 0);
+ if (ret)
+ return ret;
+
+ return spi_nor_write_disable(nor);
+}
+
+static const struct spi_nor_otp_ops winbond_nor_otp_ops = {
+ .read = spi_nor_otp_read_secr,
+ .write = spi_nor_otp_write_secr,
+ .erase = spi_nor_otp_erase_secr,
+ .lock = spi_nor_otp_lock_sr2,
+ .is_locked = spi_nor_otp_is_locked_sr2,
+};
+
+static int winbond_nor_late_init(struct spi_nor *nor)
+{
+ struct spi_nor_flash_parameter *params = nor->params;
+
+ if (params->otp.org->n_regions)
+ params->otp.ops = &winbond_nor_otp_ops;
+
+ /*
+ * Winbond seems to require that the Extended Address Register to be set
+ * to zero when exiting the 4-Byte Address Mode, at least for W25Q256FV.
+ * This requirement is not described in the JESD216 SFDP standard, thus
+ * it is Winbond specific. Since we do not know if other Winbond flashes
+ * have the same requirement, play safe and overwrite the method parsed
+ * from BFPT, if any.
+ */
+ params->set_4byte_addr_mode = winbond_nor_set_4byte_addr_mode;
+
+ return 0;
+}
+
+static const struct spi_nor_fixups winbond_nor_fixups = {
+ .late_init = winbond_nor_late_init,
+};
+
+const struct spi_nor_manufacturer spi_nor_winbond = {
+ .name = "winbond",
+ .parts = winbond_nor_parts,
+ .nparts = ARRAY_SIZE(winbond_nor_parts),
+ .fixups = &winbond_nor_fixups,
+};