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537b423d9f
Remove patches adding support for MT7621 which have been merged upsteam. Patches for MT7981 and MT7986 have been merged too, but not in time to be included in the 2022.10 release, so we have to keep carrying them until the 2023.01 release. Signed-off-by: Daniel Golle <daniel@makrotopia.org>
143 lines
3.7 KiB
Diff
143 lines
3.7 KiB
Diff
From c4172a95df8a57a66c70a8b9948b9600a01c4cb7 Mon Sep 17 00:00:00 2001
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From: Weijie Gao <weijie.gao@mediatek.com>
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Date: Mon, 25 Jul 2022 11:32:08 +0800
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Subject: [PATCH 49/71] mtd: spi-nor: add support to read flash unique ID
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This patch adds support to read unique ID from spi-nor flashes.
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Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
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---
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drivers/mtd/spi/spi-nor-core.c | 95 ++++++++++++++++++++++++++++++++++
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include/linux/mtd/spi-nor.h | 2 +
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2 files changed, 97 insertions(+)
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--- a/drivers/mtd/spi/spi-nor-core.c
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+++ b/drivers/mtd/spi/spi-nor-core.c
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@@ -2791,6 +2791,100 @@ static int spi_nor_init_params(struct sp
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return 0;
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}
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+static int spi_nor_read_uuid(struct spi_nor *nor)
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+{
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+ u8 read_opcode, addr_width, read_dummy;
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+ loff_t addr;
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+ u8 *uuid;
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+ u8 uuid_len;
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+ int shift = 0;
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+ int ret;
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+ int i;
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+ struct spi_mem_op op;
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+
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+ read_opcode = nor->read_opcode;
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+ addr_width = nor->addr_width;
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+ read_dummy = nor->read_dummy;
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+
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+ switch (JEDEC_MFR(nor->info)) {
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+ case SNOR_MFR_WINBOND:
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+ uuid_len = 8;
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+ nor->read_opcode = 0x4b;
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+ nor->addr_width = 0;
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+ addr = 0x0;
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+ nor->read_dummy = 4;
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+ break;
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+ case SNOR_MFR_GIGADEVICE:
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+ uuid_len = 16;
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+ nor->read_opcode = 0x4b;
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+ nor->addr_width = 3;
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+ addr = 0x0;
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+ nor->read_dummy = 1;
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+ break;
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+ case CFI_MFR_ST:
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+ case SNOR_MFR_MICRON:
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+ uuid_len = 17;
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+ shift = 3;
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+ nor->read_opcode = 0x9f;
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+ nor->addr_width = 0;
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+ addr = 0x0;
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+ nor->read_dummy = 0;
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+ break;
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+ case SNOR_MFR_EON:
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+ uuid_len = 12;
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+ nor->read_opcode = 0x5a;
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+ nor->addr_width = 3;
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+ addr = 0x80;
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+ nor->read_dummy = 1;
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+ break;
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+ /* Automotive only in SPANSION's NOR devices */
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+ case SNOR_MFR_SPANSION:
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+ uuid_len = 11;
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+ shift = 386;
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+ nor->read_opcode = 0x9f;
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+ nor->addr_width = 0;
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+ addr = 0x0;
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+ nor->read_dummy = 0;
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+ break;
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+ default:
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+ printf("UUID not supported on this device.\n");
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+ return -ENOTSUPP;
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+ }
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+
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+ uuid = kmalloc((uuid_len + shift) * sizeof(*uuid), GFP_KERNEL);
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+ if (!uuid) {
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+ ret = -ENOMEM;
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+ goto read_err;
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+ }
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+ memset(uuid, 0x0, (uuid_len + shift) * sizeof(*uuid));
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+
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+ op = (struct spi_mem_op)SPI_MEM_OP(SPI_MEM_OP_CMD(nor->read_opcode, 0),
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+ SPI_MEM_OP_ADDR(nor->addr_width, addr, 0),
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+ SPI_MEM_OP_DUMMY(nor->read_dummy, 0),
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+ SPI_MEM_OP_DATA_IN(uuid_len+shift, NULL, 0));
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+
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+ spi_nor_setup_op(nor, &op, nor->reg_proto);
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+
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+ ret = spi_nor_read_write_reg(nor, &op, uuid);
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+ if (ret < 0) {
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+ dev_dbg(nor->dev, "error %d reading %x\n", ret, nor->read_opcode);
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+ goto read_err;
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+ }
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+
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+ printf("UUID: 0x");
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+ for(i = 0; i<uuid_len; i++)
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+ printf("%02x", uuid[i+shift]);
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+ puts("\n");
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+
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+read_err:
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+ nor->read_opcode = read_opcode;
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+ nor->addr_width = addr_width;
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+ nor->read_dummy = read_dummy;
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+ kfree(uuid);
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+
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+ return ret;
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+}
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+
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static int spi_nor_hwcaps2cmd(u32 hwcaps, const int table[][2], size_t size)
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{
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size_t i;
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@@ -3858,6 +3952,7 @@ int spi_nor_scan(struct spi_nor *nor)
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nor->write = spi_nor_write_data;
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nor->read_reg = spi_nor_read_reg;
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nor->write_reg = spi_nor_write_reg;
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+ nor->read_uuid = spi_nor_read_uuid;
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nor->setup = spi_nor_default_setup;
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--- a/include/linux/mtd/spi-nor.h
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+++ b/include/linux/mtd/spi-nor.h
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@@ -28,6 +28,7 @@
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#define SNOR_MFR_SPANSION CFI_MFR_AMD
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#define SNOR_MFR_SST CFI_MFR_SST
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#define SNOR_MFR_WINBOND 0xef /* Also used by some Spansion */
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+#define SNOR_MFR_EON CFI_MFR_EON
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#define SNOR_MFR_CYPRESS 0x34
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/*
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@@ -558,6 +559,7 @@ struct spi_nor {
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void (*unprepare)(struct spi_nor *nor, enum spi_nor_ops ops);
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int (*read_reg)(struct spi_nor *nor, u8 opcode, u8 *buf, int len);
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int (*write_reg)(struct spi_nor *nor, u8 opcode, u8 *buf, int len);
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+ int (*read_uuid)(struct spi_nor *nor);
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ssize_t (*read)(struct spi_nor *nor, loff_t from,
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size_t len, u_char *read_buf);
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