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Message-ID: <20221018095732.251299-1-yaliang.wang@windriver.com>
Date: Tue, 18 Oct 2022 17:57:32 +0800
From: <yaliang.wang@...driver.com>
To: <yaliang.wang@...driver.com>, <tudor.ambarus@...rochip.com>,
<pratyush@...nel.org>, <michael@...le.cc>,
<miquel.raynal@...tlin.com>, <richard@....at>, <vigneshr@...com>
CC: <linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH] mtd: spi-nor: spansion: add clear sr fixup for s25fl-l family
From: Yaliang Wang <Yaliang.Wang@...driver.com>
Spansion S25FL-L family flashes s25fl064l/s25fl128l/s25fl256l can't
automatically recover from programming/erase errors, the Status Register
error bits inflecting the errors will not change until a Clear Status
Register command be executed.
Same thing also happens on other Spansion flash families, they've
properly handled it, USE_CLSR manufacturer flag was introduced for this
purpose, but S25FL-L cannot simply reuse their work, because S25FL-L has
the different error bit settings. S25FL-L defines programming/erase
error bits in Status Register 2, whereas the other families define the
same error bits in Status Register 1, causing S25FL-L needs a different
method to handle this problem.
Cc: stable@...r.kernel.org
Fixes: 0074a8f3b303 ("mtd: spi-nor: Add support for s25fl128l and s25fl256l")
Fixes: d8b494a32889 ("mtd: spi-nor: Add support for Spansion S25FL064L")
Signed-off-by: Yaliang Wang <Yaliang.Wang@...driver.com>
---
drivers/mtd/spi-nor/spansion.c | 119 ++++++++++++++++++++++++++-------
1 file changed, 93 insertions(+), 26 deletions(-)
diff --git a/drivers/mtd/spi-nor/spansion.c b/drivers/mtd/spi-nor/spansion.c
index 0150049007be..8f353ddda5f5 100644
--- a/drivers/mtd/spi-nor/spansion.c
+++ b/drivers/mtd/spi-nor/spansion.c
@@ -14,6 +14,7 @@
#define SPINOR_OP_CLSR 0x30 /* Clear status register 1 */
#define SPINOR_OP_RD_ANY_REG 0x65 /* Read any register */
#define SPINOR_OP_WR_ANY_REG 0x71 /* Write any register */
+#define SPINOR_REG_CYPRESS_SR2V 0x00800001
#define SPINOR_REG_CYPRESS_CFR1V 0x00800002
#define SPINOR_REG_CYPRESS_CFR1V_QUAD_EN BIT(1) /* Quad Enable */
#define SPINOR_REG_CYPRESS_CFR2V 0x00800003
@@ -25,6 +26,10 @@
#define SPINOR_REG_CYPRESS_CFR5V_OCT_DTR_DS 0
#define SPINOR_OP_CYPRESS_RD_FAST 0xee
+/* s25fl-l family specific */
+#define S25FL_L_SR2V_P_ERR BIT(5) /* Programming Error Occurred */
+#define S25FL_L_SR2V_E_ERR BIT(6) /* Erase Error Occurred */
+
/* Cypress SPI NOR flash operations. */
#define CYPRESS_NOR_WR_ANY_REG_OP(naddr, addr, ndata, buf) \
SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_WR_ANY_REG, 0), \
@@ -44,6 +49,29 @@
SPI_MEM_OP_NO_DUMMY, \
SPI_MEM_OP_NO_DATA)
+/**
+ * spansion_nor_clear_sr() - Clear the Status Register.
+ * @nor: pointer to 'struct spi_nor'.
+ */
+static void spansion_nor_clear_sr(struct spi_nor *nor)
+{
+ int ret;
+
+ if (nor->spimem) {
+ struct spi_mem_op op = SPANSION_CLSR_OP;
+
+ 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, SPINOR_OP_CLSR,
+ NULL, 0);
+ }
+
+ if (ret)
+ dev_dbg(nor->dev, "error %d clearing SR\n", ret);
+}
+
static int cypress_nor_octal_dtr_en(struct spi_nor *nor)
{
struct spi_mem_op op;
@@ -342,6 +370,65 @@ static const struct spi_nor_fixups s25fs_s_nor_fixups = {
.post_bfpt = s25fs_s_nor_post_bfpt_fixups,
};
+/**
+ * s25fl_l_sr_ready_and_clear() - S25FL_L family flashes need to query
+ * Status Register 1 to check if the flash is ready and clear it if
+ * there are Programming/Erase errors in Status Register 2.
+ * @nor: pointer to 'struct spi_nor'.
+ *
+ * Return: 1 if ready, 0 if not ready, -errno on errors.
+ */
+static int s25fl_l_sr_ready_and_clear(struct spi_nor *nor)
+{
+ int ret;
+ u8 addr_mode_nbytes = nor->params->addr_mode_nbytes;
+ struct spi_mem_op op =
+ CYPRESS_NOR_RD_ANY_REG_OP(addr_mode_nbytes,
+ SPINOR_REG_CYPRESS_SR2V,
+ &nor->bouncebuf[1]);
+
+ /* Read Status Register 1 */
+ ret = spi_nor_read_sr(nor, nor->bouncebuf);
+ if (ret)
+ return ret;
+
+ /* RDSR2 command isn't available in QPI mode, use RDAR instead */
+ ret = spi_nor_read_any_reg(nor, &op, nor->reg_proto);
+ if (ret)
+ return ret;
+
+ if (nor->bouncebuf[1] & (S25FL_L_SR2V_P_ERR | S25FL_L_SR2V_E_ERR)) {
+ if (nor->bouncebuf[1] & S25FL_L_SR2V_E_ERR)
+ dev_err(nor->dev, "Erase Error occurred\n");
+ else
+ dev_err(nor->dev, "Programming Error occurred\n");
+
+ spansion_nor_clear_sr(nor);
+
+ /*
+ * WEL bit remains set to one when an erase or page program
+ * error occurs. Issue a Write Disable command to protect
+ * against inadvertent writes that can possibly corrupt the
+ * contents of the memory.
+ */
+ ret = spi_nor_write_disable(nor);
+ if (ret)
+ return ret;
+
+ return -EIO;
+ }
+
+ return !(nor->bouncebuf[0] & SR_WIP);
+}
+
+static void s25fl_l_late_init(struct spi_nor *nor)
+{
+ nor->params->ready = s25fl_l_sr_ready_and_clear;
+}
+
+static const struct spi_nor_fixups s25fl_l_fixups = {
+ .late_init = s25fl_l_late_init,
+};
static const struct flash_info spansion_nor_parts[] = {
/* Spansion/Cypress -- single (large) sector size only, at least
* for the chips listed here (without boot sectors).
@@ -428,13 +515,16 @@ static const struct flash_info spansion_nor_parts[] = {
NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ) },
{ "s25fl064l", INFO(0x016017, 0, 64 * 1024, 128)
NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)
- FIXUP_FLAGS(SPI_NOR_4B_OPCODES) },
+ FIXUP_FLAGS(SPI_NOR_4B_OPCODES)
+ .fixups = &s25fl_l_fixups },
{ "s25fl128l", INFO(0x016018, 0, 64 * 1024, 256)
NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)
- FIXUP_FLAGS(SPI_NOR_4B_OPCODES) },
+ FIXUP_FLAGS(SPI_NOR_4B_OPCODES)
+ .fixups = &s25fl_l_fixups },
{ "s25fl256l", INFO(0x016019, 0, 64 * 1024, 512)
NO_SFDP_FLAGS(SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ)
- FIXUP_FLAGS(SPI_NOR_4B_OPCODES) },
+ FIXUP_FLAGS(SPI_NOR_4B_OPCODES)
+ .fixups = &s25fl_l_fixups },
{ "s25hl512t", INFO6(0x342a1a, 0x0f0390, 256 * 1024, 256)
PARSE_SFDP
MFR_FLAGS(USE_CLSR)
@@ -460,29 +550,6 @@ static const struct flash_info spansion_nor_parts[] = {
},
};
-/**
- * spansion_nor_clear_sr() - Clear the Status Register.
- * @nor: pointer to 'struct spi_nor'.
- */
-static void spansion_nor_clear_sr(struct spi_nor *nor)
-{
- int ret;
-
- if (nor->spimem) {
- struct spi_mem_op op = SPANSION_CLSR_OP;
-
- 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, SPINOR_OP_CLSR,
- NULL, 0);
- }
-
- if (ret)
- dev_dbg(nor->dev, "error %d clearing SR\n", ret);
-}
-
/**
* spansion_nor_sr_ready_and_clear() - Query the Status Register to see if the
* flash is ready for new commands and clear it if there are any errors.
--
2.34.1
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