Add XT25F128B Support

Add_xtx25f128b_flash_chip.patch

From 0de196e1af6d853bd362cc23edbdf76ff4614d8b Mon Sep 17 00:00:00 2001
From: Chris Morgan <[email protected]>
Date: Mon, 1 Mar 2021 10:51:21 -0600
Subject: [PATCH] Add xtx flash chips

---
 drivers/mtd/spi-nor/Makefile |  1 +
 drivers/mtd/spi-nor/core.c   |  1 +
 drivers/mtd/spi-nor/core.h   |  1 +
 drivers/mtd/spi-nor/xtx.c    | 53 ++++++++++++++++++++++++++++++++++++
 4 files changed, 56 insertions(+)
 create mode 100644 drivers/mtd/spi-nor/xtx.c

diff --git a/drivers/mtd/spi-nor/Makefile b/drivers/mtd/spi-nor/Makefile
index 653923896205..3f7a52d7fa0b 100644
--- a/drivers/mtd/spi-nor/Makefile
+++ b/drivers/mtd/spi-nor/Makefile
@@ -17,6 +17,7 @@ spi-nor-objs                  += sst.o
 spi-nor-objs                   += winbond.o
 spi-nor-objs                   += xilinx.o
 spi-nor-objs                   += xmc.o
+spi-nor-objs                   += xtx.o
 obj-$(CONFIG_MTD_SPI_NOR)      += spi-nor.o

 obj-$(CONFIG_MTD_SPI_NOR)      += controllers/
diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index 0522304f52fa..9a89ec473e4b 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -2215,6 +2215,7 @@ static const struct spi_nor_manufacturer *manufacturers[] = {
        &spi_nor_winbond,
        &spi_nor_xilinx,
        &spi_nor_xmc,
+       &spi_nor_xtx,
 };

 static const struct flash_info *
diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h
index 4a3f7f150b5d..ee0e45eaffcd 100644
--- a/drivers/mtd/spi-nor/core.h
+++ b/drivers/mtd/spi-nor/core.h
@@ -425,6 +425,7 @@ extern const struct spi_nor_manufacturer spi_nor_sst;
 extern const struct spi_nor_manufacturer spi_nor_winbond;
 extern const struct spi_nor_manufacturer spi_nor_xilinx;
 extern const struct spi_nor_manufacturer spi_nor_xmc;
+extern const struct spi_nor_manufacturer spi_nor_xtx;

 void spi_nor_spimem_setup_op(const struct spi_nor *nor,
                             struct spi_mem_op *op,
diff --git a/drivers/mtd/spi-nor/xtx.c b/drivers/mtd/spi-nor/xtx.c
new file mode 100644
index 000000000000..43fdbc3144ca
--- /dev/null
+++ b/drivers/mtd/spi-nor/xtx.c
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2021, Chris Morgan <[email protected]>
+ * Based on XMC SPI NOR module
+ * Copyright (C) 2005, Intec Automation Inc.
+ * Copyright (C) 2014, Freescale Semiconductor, Inc.
+ */
+
+#include <linux/mtd/spi-nor.h>
+
+#include "core.h"
+
+static const struct flash_info xtx_parts[] = {
+       /* XTX (XTX Technology Limited) */
+       { "XT25F128B", INFO(0x0b4018, 0, 64 * 1024, 256,
+                            SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ |
+                            SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB) },
+};
+
+static int xtx_set_4byte_addr_mode(struct spi_nor *nor, bool enable)
+{
+       int ret;
+
+       ret = spi_nor_set_4byte_addr_mode(nor, enable);
+       if (ret || enable)
+               return ret;
+
+       ret = spi_nor_write_enable(nor);
+       if (ret)
+               return ret;
+
+       ret = spi_nor_write_ear(nor, 0);
+       if (ret)
+               return ret;
+
+       return spi_nor_write_disable(nor);
+}
+
+static void xtx_default_init(struct spi_nor *nor)
+{
+       nor->params->set_4byte_addr_mode = xtx_set_4byte_addr_mode;
+}
+
+static const struct spi_nor_fixups xtx_fixups = {
+       .default_init = xtx_default_init,
+};
+
+const struct spi_nor_manufacturer spi_nor_xtx = {
+       .name = "xtx",
+       .parts = xtx_parts,
+       .nparts = ARRAY_SIZE(xtx_parts),
+//     .fixups = &xtx_fixups,
+};
--
2.25.1