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Subject[PATCH 04/23] mtd: spi-nor: Expose stuctures and functions to manufacturer drivers
Date
From: Boris Brezillon <bbrezillon@kernel.org>

Expose the flash_info struct and the generic set_4byte() implementations.
Some manufacturers rely on the generic set_4byte() implementations.
Remove the static specifier and expose their prototypes in core.h.

Signed-off-by: Boris Brezillon <bbrezillon@kernel.org>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
---
drivers/mtd/spi-nor/core.c | 171 +++----------------------------------
drivers/mtd/spi-nor/core.h | 159 ++++++++++++++++++++++++++++++++++
2 files changed, 170 insertions(+), 160 deletions(-)

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index 1edcb53c4df3..16cf9d4b1a73 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -38,102 +38,8 @@
*/
#define CHIP_ERASE_2MB_READY_WAIT_JIFFIES (40UL * HZ)

-#define SPI_NOR_MAX_ID_LEN 6
#define SPI_NOR_MAX_ADDR_WIDTH 4

-/**
- * struct spi_nor_fixups - SPI NOR fixup hooks
- * @default_init: called after default flash parameters init. Used to tweak
- * flash parameters when information provided by the flash_info
- * table is incomplete or wrong.
- * @post_bfpt: called after the BFPT table has been parsed
- * @post_sfdp: called after SFDP has been parsed (is also called for SPI NORs
- * that do not support RDSFDP). Typically used to tweak various
- * parameters that could not be extracted by other means (i.e.
- * when information provided by the SFDP/flash_info tables are
- * incomplete or wrong).
- *
- * Those hooks can be used to tweak the SPI NOR configuration when the SFDP
- * table is broken or not available.
- */
-struct spi_nor_fixups {
- void (*default_init)(struct spi_nor *nor);
- int (*post_bfpt)(struct spi_nor *nor,
- const struct sfdp_parameter_header *bfpt_header,
- const struct sfdp_bfpt *bfpt,
- struct spi_nor_flash_parameter *params);
- void (*post_sfdp)(struct spi_nor *nor);
-};
-
-struct flash_info {
- char *name;
-
- /*
- * This array stores the ID bytes.
- * The first three bytes are the JEDIC ID.
- * JEDEC ID zero means "no ID" (mostly older chips).
- */
- u8 id[SPI_NOR_MAX_ID_LEN];
- u8 id_len;
-
- /* The size listed here is what works with SPINOR_OP_SE, which isn't
- * necessarily called a "sector" by the vendor.
- */
- unsigned sector_size;
- u16 n_sectors;
-
- u16 page_size;
- u16 addr_width;
-
- u32 flags;
-#define SECT_4K BIT(0) /* SPINOR_OP_BE_4K works uniformly */
-#define SPI_NOR_NO_ERASE BIT(1) /* No erase command needed */
-#define SST_WRITE BIT(2) /* use SST byte programming */
-#define SPI_NOR_NO_FR BIT(3) /* Can't do fastread */
-#define SECT_4K_PMC BIT(4) /* SPINOR_OP_BE_4K_PMC works uniformly */
-#define SPI_NOR_DUAL_READ BIT(5) /* Flash supports Dual Read */
-#define SPI_NOR_QUAD_READ BIT(6) /* Flash supports Quad Read */
-#define USE_FSR BIT(7) /* use flag status register */
-#define SPI_NOR_HAS_LOCK BIT(8) /* Flash supports lock/unlock via SR */
-#define SPI_NOR_HAS_TB BIT(9) /*
- * Flash SR has Top/Bottom (TB) protect
- * bit. Must be used with
- * SPI_NOR_HAS_LOCK.
- */
-#define SPI_NOR_XSR_RDY BIT(10) /*
- * S3AN flashes have specific opcode to
- * read the status register.
- * Flags SPI_NOR_XSR_RDY and SPI_S3AN
- * use the same bit as one implies the
- * other, but we will get rid of
- * SPI_S3AN soon.
- */
-#define SPI_S3AN BIT(10) /*
- * Xilinx Spartan 3AN In-System Flash
- * (MFR cannot be used for probing
- * because it has the same value as
- * ATMEL flashes)
- */
-#define SPI_NOR_4B_OPCODES BIT(11) /*
- * Use dedicated 4byte address op codes
- * to support memory size above 128Mib.
- */
-#define NO_CHIP_ERASE BIT(12) /* Chip does not support chip erase */
-#define SPI_NOR_SKIP_SFDP BIT(13) /* Skip parsing of SFDP tables */
-#define USE_CLSR BIT(14) /* use CLSR command */
-#define SPI_NOR_OCTAL_READ BIT(15) /* Flash supports Octal Read */
-#define SPI_NOR_TB_SR_BIT6 BIT(16) /*
- * Top/Bottom (TB) is bit 6 of
- * status register. Must be used with
- * SPI_NOR_HAS_TB.
- */
-
- /* Part specific fixup hooks. */
- const struct spi_nor_fixups *fixups;
-};
-
-#define JEDEC_MFR(info) ((info)->id[0])
-
/**
* spi_nor_spimem_bounce() - check if a bounce buffer is needed for the data
* transfer
@@ -295,8 +201,8 @@ static ssize_t spi_nor_spimem_write_data(struct spi_nor *nor, loff_t to,
*
* Return: number of bytes written successfully, -errno otherwise
*/
-static ssize_t spi_nor_write_data(struct spi_nor *nor, loff_t to, size_t len,
- const u8 *buf)
+ssize_t spi_nor_write_data(struct spi_nor *nor, loff_t to, size_t len,
+ const u8 *buf)
{
if (nor->spimem)
return spi_nor_spimem_write_data(nor, to, len, buf);
@@ -310,7 +216,7 @@ static ssize_t spi_nor_write_data(struct spi_nor *nor, loff_t to, size_t len,
*
* Return: 0 on success, -errno otherwise.
*/
-static int spi_nor_write_enable(struct spi_nor *nor)
+int spi_nor_write_enable(struct spi_nor *nor)
{
int ret;

@@ -339,7 +245,7 @@ static int spi_nor_write_enable(struct spi_nor *nor)
*
* Return: 0 on success, -errno otherwise.
*/
-static int spi_nor_write_disable(struct spi_nor *nor)
+int spi_nor_write_disable(struct spi_nor *nor)
{
int ret;

@@ -464,7 +370,7 @@ static int spi_nor_read_cr(struct spi_nor *nor, u8 *cr)
*
* Return: 0 on success, -errno otherwise.
*/
-static int spi_nor_en4_ex4_set_4byte(struct spi_nor *nor, bool enable)
+int spi_nor_en4_ex4_set_4byte(struct spi_nor *nor, bool enable)
{
int ret;

@@ -501,7 +407,7 @@ static int spi_nor_en4_ex4_set_4byte(struct spi_nor *nor, bool enable)
*
* Return: 0 on success, -errno otherwise.
*/
-static int spi_nor_en4_ex4_wen_set_4byte(struct spi_nor *nor, bool enable)
+int spi_nor_en4_ex4_wen_set_4byte(struct spi_nor *nor, bool enable)
{
int ret;

@@ -556,7 +462,7 @@ static int spansion_set_4byte(struct spi_nor *nor, bool enable)
*
* Return: 0 on success, -errno otherwise.
*/
-static int spi_nor_write_ear(struct spi_nor *nor, u8 ear)
+int spi_nor_write_ear(struct spi_nor *nor, u8 ear)
{
int ret;

@@ -621,7 +527,7 @@ static int winbond_set_4byte(struct spi_nor *nor, bool enable)
*
* Return: 0 on success, -errno otherwise.
*/
-static int spi_nor_xread_sr(struct spi_nor *nor, u8 *sr)
+int spi_nor_xread_sr(struct spi_nor *nor, u8 *sr)
{
int ret;

@@ -834,7 +740,7 @@ static int spi_nor_wait_till_ready_with_timeout(struct spi_nor *nor,
*
* Return: 0 on success, -errno otherwise.
*/
-static int spi_nor_wait_till_ready(struct spi_nor *nor)
+int spi_nor_wait_till_ready(struct spi_nor *nor)
{
return spi_nor_wait_till_ready_with_timeout(nor,
DEFAULT_READY_WAIT_JIFFIES);
@@ -1142,11 +1048,6 @@ static int spi_nor_erase_chip(struct spi_nor *nor)
return ret;
}

-static struct spi_nor *mtd_to_spi_nor(struct mtd_info *mtd)
-{
- return mtd->priv;
-}
-
static u8 spi_nor_convert_opcode(u8 opcode, const u8 table[][2], size_t size)
{
size_t i;
@@ -1225,7 +1126,7 @@ static void spi_nor_set_4byte_opcodes(struct spi_nor *nor)
}
}

-static int spi_nor_lock_and_prep(struct spi_nor *nor)
+int spi_nor_lock_and_prep(struct spi_nor *nor)
{
int ret = 0;

@@ -1241,7 +1142,7 @@ static int spi_nor_lock_and_prep(struct spi_nor *nor)
return ret;
}

-static void spi_nor_unlock_and_unprep(struct spi_nor *nor)
+void spi_nor_unlock_and_unprep(struct spi_nor *nor)
{
if (nor->controller_ops && nor->controller_ops->unprepare)
nor->controller_ops->unprepare(nor);
@@ -2104,56 +2005,6 @@ int spi_nor_sr2_bit7_quad_enable(struct spi_nor *nor)
return 0;
}

-/* Used when the "_ext_id" is two bytes at most */
-#define INFO(_jedec_id, _ext_id, _sector_size, _n_sectors, _flags) \
- .id = { \
- ((_jedec_id) >> 16) & 0xff, \
- ((_jedec_id) >> 8) & 0xff, \
- (_jedec_id) & 0xff, \
- ((_ext_id) >> 8) & 0xff, \
- (_ext_id) & 0xff, \
- }, \
- .id_len = (!(_jedec_id) ? 0 : (3 + ((_ext_id) ? 2 : 0))), \
- .sector_size = (_sector_size), \
- .n_sectors = (_n_sectors), \
- .page_size = 256, \
- .flags = (_flags),
-
-#define INFO6(_jedec_id, _ext_id, _sector_size, _n_sectors, _flags) \
- .id = { \
- ((_jedec_id) >> 16) & 0xff, \
- ((_jedec_id) >> 8) & 0xff, \
- (_jedec_id) & 0xff, \
- ((_ext_id) >> 16) & 0xff, \
- ((_ext_id) >> 8) & 0xff, \
- (_ext_id) & 0xff, \
- }, \
- .id_len = 6, \
- .sector_size = (_sector_size), \
- .n_sectors = (_n_sectors), \
- .page_size = 256, \
- .flags = (_flags),
-
-#define CAT25_INFO(_sector_size, _n_sectors, _page_size, _addr_width, _flags) \
- .sector_size = (_sector_size), \
- .n_sectors = (_n_sectors), \
- .page_size = (_page_size), \
- .addr_width = (_addr_width), \
- .flags = (_flags),
-
-#define S3AN_INFO(_jedec_id, _n_sectors, _page_size) \
- .id = { \
- ((_jedec_id) >> 16) & 0xff, \
- ((_jedec_id) >> 8) & 0xff, \
- (_jedec_id) & 0xff \
- }, \
- .id_len = 3, \
- .sector_size = (8*_page_size), \
- .n_sectors = (_n_sectors), \
- .page_size = _page_size, \
- .addr_width = 3, \
- .flags = SPI_NOR_NO_FR | SPI_S3AN,
-
static int
is25lp256_post_bfpt_fixups(struct spi_nor *nor,
const struct sfdp_parameter_header *bfpt_header,
diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h
index e1256fe50d12..7e2d88edf1f1 100644
--- a/drivers/mtd/spi-nor/core.h
+++ b/drivers/mtd/spi-nor/core.h
@@ -9,12 +9,166 @@

#include "sfdp.h"

+#define SPI_NOR_MAX_ID_LEN 6
+
+/**
+ * struct spi_nor_fixups - SPI NOR fixup hooks
+ * @default_init: called after default flash parameters init. Used to tweak
+ * flash parameters when information provided by the flash_info
+ * table is incomplete or wrong.
+ * @post_bfpt: called after the BFPT table has been parsed
+ * @post_sfdp: called after SFDP has been parsed (is also called for SPI NORs
+ * that do not support RDSFDP). Typically used to tweak various
+ * parameters that could not be extracted by other means (i.e.
+ * when information provided by the SFDP/flash_info tables are
+ * incomplete or wrong).
+ *
+ * Those hooks can be used to tweak the SPI NOR configuration when the SFDP
+ * table is broken or not available.
+ */
+struct spi_nor_fixups {
+ void (*default_init)(struct spi_nor *nor);
+ int (*post_bfpt)(struct spi_nor *nor,
+ const struct sfdp_parameter_header *bfpt_header,
+ const struct sfdp_bfpt *bfpt,
+ struct spi_nor_flash_parameter *params);
+ void (*post_sfdp)(struct spi_nor *nor);
+};
+
+struct flash_info {
+ char *name;
+
+ /*
+ * This array stores the ID bytes.
+ * The first three bytes are the JEDIC ID.
+ * JEDEC ID zero means "no ID" (mostly older chips).
+ */
+ u8 id[SPI_NOR_MAX_ID_LEN];
+ u8 id_len;
+
+ /* The size listed here is what works with SPINOR_OP_SE, which isn't
+ * necessarily called a "sector" by the vendor.
+ */
+ unsigned sector_size;
+ u16 n_sectors;
+
+ u16 page_size;
+ u16 addr_width;
+
+ u32 flags;
+#define SECT_4K BIT(0) /* SPINOR_OP_BE_4K works uniformly */
+#define SPI_NOR_NO_ERASE BIT(1) /* No erase command needed */
+#define SST_WRITE BIT(2) /* use SST byte programming */
+#define SPI_NOR_NO_FR BIT(3) /* Can't do fastread */
+#define SECT_4K_PMC BIT(4) /* SPINOR_OP_BE_4K_PMC works uniformly */
+#define SPI_NOR_DUAL_READ BIT(5) /* Flash supports Dual Read */
+#define SPI_NOR_QUAD_READ BIT(6) /* Flash supports Quad Read */
+#define USE_FSR BIT(7) /* use flag status register */
+#define SPI_NOR_HAS_LOCK BIT(8) /* Flash supports lock/unlock via SR */
+#define SPI_NOR_HAS_TB BIT(9) /*
+ * Flash SR has Top/Bottom (TB) protect
+ * bit. Must be used with
+ * SPI_NOR_HAS_LOCK.
+ */
+#define SPI_NOR_XSR_RDY BIT(10) /*
+ * S3AN flashes have specific opcode to
+ * read the status register.
+ * Flags SPI_NOR_XSR_RDY and SPI_S3AN
+ * use the same bit as one implies the
+ * other, but we will get rid of
+ * SPI_S3AN soon.
+ */
+#define SPI_S3AN BIT(10) /*
+ * Xilinx Spartan 3AN In-System Flash
+ * (MFR cannot be used for probing
+ * because it has the same value as
+ * ATMEL flashes)
+ */
+#define SPI_NOR_4B_OPCODES BIT(11) /*
+ * Use dedicated 4byte address op codes
+ * to support memory size above 128Mib.
+ */
+#define NO_CHIP_ERASE BIT(12) /* Chip does not support chip erase */
+#define SPI_NOR_SKIP_SFDP BIT(13) /* Skip parsing of SFDP tables */
+#define USE_CLSR BIT(14) /* use CLSR command */
+#define SPI_NOR_OCTAL_READ BIT(15) /* Flash supports Octal Read */
+#define SPI_NOR_TB_SR_BIT6 BIT(16) /*
+ * Top/Bottom (TB) is bit 6 of
+ * status register. Must be used with
+ * SPI_NOR_HAS_TB.
+ */
+
+ /* Part specific fixup hooks. */
+ const struct spi_nor_fixups *fixups;
+};
+
+/* Used when the "_ext_id" is two bytes at most */
+#define INFO(_jedec_id, _ext_id, _sector_size, _n_sectors, _flags) \
+ .id = { \
+ ((_jedec_id) >> 16) & 0xff, \
+ ((_jedec_id) >> 8) & 0xff, \
+ (_jedec_id) & 0xff, \
+ ((_ext_id) >> 8) & 0xff, \
+ (_ext_id) & 0xff, \
+ }, \
+ .id_len = (!(_jedec_id) ? 0 : (3 + ((_ext_id) ? 2 : 0))), \
+ .sector_size = (_sector_size), \
+ .n_sectors = (_n_sectors), \
+ .page_size = 256, \
+ .flags = (_flags),
+
+#define INFO6(_jedec_id, _ext_id, _sector_size, _n_sectors, _flags) \
+ .id = { \
+ ((_jedec_id) >> 16) & 0xff, \
+ ((_jedec_id) >> 8) & 0xff, \
+ (_jedec_id) & 0xff, \
+ ((_ext_id) >> 16) & 0xff, \
+ ((_ext_id) >> 8) & 0xff, \
+ (_ext_id) & 0xff, \
+ }, \
+ .id_len = 6, \
+ .sector_size = (_sector_size), \
+ .n_sectors = (_n_sectors), \
+ .page_size = 256, \
+ .flags = (_flags),
+
+#define CAT25_INFO(_sector_size, _n_sectors, _page_size, _addr_width, _flags) \
+ .sector_size = (_sector_size), \
+ .n_sectors = (_n_sectors), \
+ .page_size = (_page_size), \
+ .addr_width = (_addr_width), \
+ .flags = (_flags),
+
+#define S3AN_INFO(_jedec_id, _n_sectors, _page_size) \
+ .id = { \
+ ((_jedec_id) >> 16) & 0xff, \
+ ((_jedec_id) >> 8) & 0xff, \
+ (_jedec_id) & 0xff \
+ }, \
+ .id_len = 3, \
+ .sector_size = (8*_page_size), \
+ .n_sectors = (_n_sectors), \
+ .page_size = _page_size, \
+ .addr_width = 3, \
+ .flags = SPI_NOR_NO_FR | SPI_S3AN,
+
+int spi_nor_write_enable(struct spi_nor *nor);
+int spi_nor_write_disable(struct spi_nor *nor);
+int spi_nor_en4_ex4_set_4byte(struct spi_nor *nor, bool enable);
+int spi_nor_en4_ex4_wen_set_4byte(struct spi_nor *nor, bool enable);
+int spi_nor_write_ear(struct spi_nor *nor, u8 ear);
+int spi_nor_wait_till_ready(struct spi_nor *nor);
+int spi_nor_lock_and_prep(struct spi_nor *nor);
+void spi_nor_unlock_and_unprep(struct spi_nor *nor);
int spi_nor_sr1_bit6_quad_enable(struct spi_nor *nor);
int spi_nor_sr2_bit1_quad_enable(struct spi_nor *nor);
int spi_nor_sr2_bit7_quad_enable(struct spi_nor *nor);

+int spi_nor_xread_sr(struct spi_nor *nor, u8 *sr);
ssize_t spi_nor_read_data(struct spi_nor *nor, loff_t from, size_t len,
u8 *buf);
+ssize_t spi_nor_write_data(struct spi_nor *nor, loff_t to, size_t len,
+ const u8 *buf);

int spi_nor_hwcaps_read2cmd(u32 hwcaps);
u8 spi_nor_convert_3to4_read(u8 opcode);
@@ -33,4 +187,9 @@ int spi_nor_post_bfpt_fixups(struct spi_nor *nor,
const struct sfdp_bfpt *bfpt,
struct spi_nor_flash_parameter *params);

+static struct spi_nor __maybe_unused *mtd_to_spi_nor(struct mtd_info *mtd)
+{
+ return mtd->priv;
+}
+
#endif /* __LINUX_MTD_SPI_NOR_INTERNAL_H */
--
2.23.0
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