332645a610
- Backport upstream Winbond W25N04KV Flash support.
- Backport upstream GigaDevice series Flash support.
- Backport pending Airoha AN8855 switch TPID value fix.
- Backport Mediatek UART baudrate accuracy compensation support.
- Pull mtk patchset from MTK SDK mtksoc-20250711 branch:
Remove mt7622_rfb changes. The MTK SDK already dropped them.
Replace Airoha ethernet PHY driver with new version.
Split downstream snfi changes into independent patches.
Add new Marvell CUX3410 PHY driver.
Add new MediaTek built-in 2.5Gbps PHY driver.
Signed-off-by: Shiji Yang <yangshiji66@outlook.com>
142 lines
3.7 KiB
Diff
142 lines
3.7 KiB
Diff
From b4c97d64ab00d74359112b8fc6e329d2fef792e3 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 12/30] 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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@@ -3262,6 +3262,100 @@ 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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@@ -4486,6 +4580,7 @@ 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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@@ -32,6 +32,7 @@
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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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@@ -590,6 +591,7 @@ 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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