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https://github.com/openwrt/openwrt.git
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111 lines
3.6 KiB
Diff
111 lines
3.6 KiB
Diff
From 0878404f549021e7fe0a49ae0454cf53fd452add Mon Sep 17 00:00:00 2001
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From: Yunhui Cui <yunhui.cui@nxp.com>
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Date: Tue, 2 Feb 2016 12:00:27 +0800
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Subject: [PATCH 103/113] mtd: spi-nor: Support R/W for S25FS-S family flash
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With the physical sectors combination, S25FS-S family flash
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requires some special operations for read/write functions.
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Signed-off-by: Yunhui Cui <yunhui.cui@nxp.com>
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---
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drivers/mtd/spi-nor/spi-nor.c | 60 +++++++++++++++++++++++++++++++++++++++++
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1 file changed, 60 insertions(+)
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--- a/drivers/mtd/spi-nor/spi-nor.c
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+++ b/drivers/mtd/spi-nor/spi-nor.c
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@@ -40,6 +40,10 @@
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#define SPI_NOR_MAX_ID_LEN 6
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#define SPI_NOR_MAX_ADDR_WIDTH 4
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#define SPI_NOR_MICRON_WRITE_ENABLE 0x7f
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+/* Added for S25FS-S family flash */
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+#define SPINOR_CONFIG_REG3_OFFSET 0x800004
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+#define CR3V_4KB_ERASE_UNABLE 0x8
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+#define SPINOR_S25FS_FAMILY_ID 0x81
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struct flash_info {
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char *name;
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@@ -74,6 +78,8 @@ struct flash_info {
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};
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#define JEDEC_MFR(info) ((info)->id[0])
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+#define EXT_ID(info) ((info)->id[5])
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+
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static const struct flash_info *spi_nor_match_id(const char *name);
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@@ -786,6 +792,7 @@ static const struct flash_info spi_nor_i
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*/
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{ "s25sl032p", INFO(0x010215, 0x4d00, 64 * 1024, 64, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
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{ "s25sl064p", INFO(0x010216, 0x4d00, 64 * 1024, 128, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
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+ { "s25fs256s1", INFO6(0x010219, 0x4d0181, 64 * 1024, 512, 0)},
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{ "s25fl256s0", INFO(0x010219, 0x4d00, 256 * 1024, 128, 0) },
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{ "s25fl256s1", INFO(0x010219, 0x4d01, 64 * 1024, 512, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
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{ "s25fl512s", INFO(0x010220, 0x4d00, 256 * 1024, 256, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
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@@ -910,6 +917,53 @@ static const struct flash_info *spi_nor_
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return ERR_PTR(-ENODEV);
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}
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+/*
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+ * The S25FS-S family physical sectors may be configured as a
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+ * hybrid combination of eight 4-kB parameter sectors
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+ * at the top or bottom of the address space with all
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+ * but one of the remaining sectors being uniform size.
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+ * The Parameter Sector Erase commands (20h or 21h) must
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+ * be used to erase the 4-kB parameter sectors individually.
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+ * The Sector (uniform sector) Erase commands (D8h or DCh)
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+ * must be used to erase any of the remaining
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+ * sectors, including the portion of highest or lowest address
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+ * sector that is not overlaid by the parameter sectors.
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+ * The uniform sector erase command has no effect on parameter sectors.
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+ */
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+static int spansion_s25fs_disable_4kb_erase(struct spi_nor *nor)
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+{
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+ struct fsl_qspi *q;
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+ u32 cr3v_addr = SPINOR_CONFIG_REG3_OFFSET;
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+ u8 cr3v = 0x0;
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+ int ret = 0x0;
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+
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+ q = nor->priv;
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+
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+ nor->cmd_buf[2] = cr3v_addr >> 16;
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+ nor->cmd_buf[1] = cr3v_addr >> 8;
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+ nor->cmd_buf[0] = cr3v_addr >> 0;
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+
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+ ret = nor->read_reg(nor, SPINOR_OP_SPANSION_RDAR, &cr3v, 1);
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+ if (ret)
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+ return ret;
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+ if (cr3v & CR3V_4KB_ERASE_UNABLE)
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+ return 0;
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+ ret = nor->write_reg(nor, SPINOR_OP_WREN, NULL, 0);
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+ if (ret)
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+ return ret;
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+ cr3v = CR3V_4KB_ERASE_UNABLE;
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+ nor->program_opcode = SPINOR_OP_SPANSION_WRAR;
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+ nor->write(nor, cr3v_addr, 1, &cr3v);
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+
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+ ret = nor->read_reg(nor, SPINOR_OP_SPANSION_RDAR, &cr3v, 1);
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+ if (ret)
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+ return ret;
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+ if (!(cr3v & CR3V_4KB_ERASE_UNABLE))
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+ return -EPERM;
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+
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+ return 0;
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+}
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+
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static int spi_nor_read(struct mtd_info *mtd, loff_t from, size_t len,
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size_t *retlen, u_char *buf)
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{
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@@ -1255,6 +1309,12 @@ int spi_nor_scan(struct spi_nor *nor, co
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write_sr(nor, ret);
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}
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+ if (EXT_ID(info) == SPINOR_S25FS_FAMILY_ID) {
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+ ret = spansion_s25fs_disable_4kb_erase(nor);
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+ if (ret)
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+ return ret;
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+ }
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+
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if (!mtd->name)
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mtd->name = dev_name(dev);
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mtd->priv = nor;
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