[U-Boot] [PATCH v6 1/4] mtd, spi: add MTD layer driver
Heiko Schocher
hs at denx.de
Mon Apr 27 07:42:04 CEST 2015
From: Daniel Schwierzeck <daniel.schwierzeck at gmail.com>
add MTD layer driver for spi, original patch from:
http://git.denx.de/?p=u-boot/u-boot-mips.git;a=commitdiff;h=bb246819cdc90493dd7089eaa51b9e639765cced
changes from Heiko Schocher against this patch:
- remove compile error if not defining CONFIG_SPI_FLASH_MTD:
LD drivers/mtd/spi/built-in.o
drivers/mtd/spi/sf_probe.o: In function `spi_flash_mtd_unregister':
/home/hs/abb/imx6/u-boot/drivers/mtd/spi/sf_internal.h:168: multiple definition of `spi_flash_mtd_unregister'
drivers/mtd/spi/sf_params.o:/home/hs/abb/imx6/u-boot/drivers/mtd/spi/sf_internal.h:168: first defined here
drivers/mtd/spi/sf_ops.o: In function `spi_flash_mtd_unregister':
/home/hs/abb/imx6/u-boot/drivers/mtd/spi/sf_internal.h:168: multiple definition of `spi_flash_mtd_unregister'
drivers/mtd/spi/sf_params.o:/home/hs/abb/imx6/u-boot/drivers/mtd/spi/sf_internal.h:168: first defined here
make[1]: *** [drivers/mtd/spi/built-in.o] Fehler 1
make: *** [drivers/mtd/spi] Fehler 2
- add a README entry.
- add correct writebufsize, to fit with Linux v3.14
MTD, UBI/UBIFS sync.
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck at gmail.com>
Signed-off-by: Heiko Schocher <hs at denx.de>
---
Changes in v6: None
Changes in v2:
- add comment from Daniel Schwierzeck:
fix compile error from original patch with
"static inline" rather than "static __maybe_unused"
Series-changes: 3
- rebase with d6c1ffc7d23f4fe4ae8c91101861055b8e1501b6
Series-changes: 4
- rebased against 385a08a60f042061b004642d6b9bb6cfb794ad5a
Series-changes: 5
- no changes
Series-changes: 6
- add comments from Jagan Teki:
move code, which checks if flash pointer is used
into a new patch.
- use #ifdef in Code
- call mtd register before the spi_release_bus
README | 3 ++
common/cmd_sf.c | 2 -
drivers/mtd/spi/Makefile | 1 +
drivers/mtd/spi/sf_internal.h | 5 ++
drivers/mtd/spi/sf_mtd.c | 104 ++++++++++++++++++++++++++++++++++++++++++
drivers/mtd/spi/sf_probe.c | 10 ++--
6 files changed, 119 insertions(+), 6 deletions(-)
create mode 100644 drivers/mtd/spi/sf_mtd.c
diff --git a/README b/README
index fc1fd52..36f6fc9 100644
--- a/README
+++ b/README
@@ -3097,6 +3097,9 @@ CBFS (Coreboot Filesystem) support
operation will not execute. The only way to exit this
hardware-protected mode is to drive W#/VPP HIGH.
+ CONFIG_SPI_FLASH_MTD
+ add MTD translation layer driver.
+
- SystemACE Support:
CONFIG_SYSTEMACE
diff --git a/common/cmd_sf.c b/common/cmd_sf.c
index 6aabf39..0250011 100644
--- a/common/cmd_sf.c
+++ b/common/cmd_sf.c
@@ -139,8 +139,6 @@ static int do_spi_flash_probe(int argc, char * const argv[])
return 1;
}
- if (flash)
- spi_flash_free(flash);
flash = new;
#endif
diff --git a/drivers/mtd/spi/Makefile b/drivers/mtd/spi/Makefile
index c61b784e..f8580cd 100644
--- a/drivers/mtd/spi/Makefile
+++ b/drivers/mtd/spi/Makefile
@@ -17,5 +17,6 @@ obj-$(CONFIG_SPI_FLASH) += sf_probe.o
#endif
obj-$(CONFIG_CMD_SF) += sf.o
obj-$(CONFIG_SPI_FLASH) += sf_ops.o sf_params.o
+obj-$(CONFIG_SPI_FLASH_MTD) += sf_mtd.o
obj-$(CONFIG_SPI_FLASH_SANDBOX) += sandbox.o
obj-$(CONFIG_SPI_M95XXX) += eeprom_m95xxx.o
diff --git a/drivers/mtd/spi/sf_internal.h b/drivers/mtd/spi/sf_internal.h
index 785f7a9..8a2eb6e 100644
--- a/drivers/mtd/spi/sf_internal.h
+++ b/drivers/mtd/spi/sf_internal.h
@@ -221,4 +221,9 @@ int spi_flash_read_common(struct spi_flash *flash, const u8 *cmd,
int spi_flash_cmd_read_ops(struct spi_flash *flash, u32 offset,
size_t len, void *data);
+#ifdef CONFIG_SPI_FLASH_MTD
+int spi_flash_mtd_register(struct spi_flash *flash);
+void spi_flash_mtd_unregister(void);
+#endif
+
#endif /* _SF_INTERNAL_H_ */
diff --git a/drivers/mtd/spi/sf_mtd.c b/drivers/mtd/spi/sf_mtd.c
new file mode 100644
index 0000000..0b9cb62
--- /dev/null
+++ b/drivers/mtd/spi/sf_mtd.c
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2012-2014 Daniel Schwierzeck, daniel.schwierzeck at gmail.com
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <asm/errno.h>
+#include <linux/mtd/mtd.h>
+#include <spi_flash.h>
+
+static struct mtd_info sf_mtd_info;
+static char sf_mtd_name[8];
+
+static int spi_flash_mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
+{
+ struct spi_flash *flash = mtd->priv;
+ int err;
+
+ instr->state = MTD_ERASING;
+
+ err = spi_flash_erase(flash, instr->addr, instr->len);
+ if (err) {
+ instr->state = MTD_ERASE_FAILED;
+ instr->fail_addr = MTD_FAIL_ADDR_UNKNOWN;
+ return -EIO;
+ }
+
+ instr->state = MTD_ERASE_DONE;
+ mtd_erase_callback(instr);
+
+ return 0;
+}
+
+static int spi_flash_mtd_read(struct mtd_info *mtd, loff_t from, size_t len,
+ size_t *retlen, u_char *buf)
+{
+ struct spi_flash *flash = mtd->priv;
+ int err;
+
+ err = spi_flash_read(flash, from, len, buf);
+ if (!err)
+ *retlen = len;
+
+ return err;
+}
+
+static int spi_flash_mtd_write(struct mtd_info *mtd, loff_t to, size_t len,
+ size_t *retlen, const u_char *buf)
+{
+ struct spi_flash *flash = mtd->priv;
+ int err;
+
+ err = spi_flash_write(flash, to, len, buf);
+ if (!err)
+ *retlen = len;
+
+ return err;
+}
+
+static void spi_flash_mtd_sync(struct mtd_info *mtd)
+{
+}
+
+static int spi_flash_mtd_number(void)
+{
+#ifdef CONFIG_SYS_MAX_FLASH_BANKS
+ return CONFIG_SYS_MAX_FLASH_BANKS;
+#else
+ return 0;
+#endif
+}
+
+int spi_flash_mtd_register(struct spi_flash *flash)
+{
+ memset(&sf_mtd_info, 0, sizeof(sf_mtd_info));
+ sprintf(sf_mtd_name, "nor%d", spi_flash_mtd_number());
+
+ sf_mtd_info.name = sf_mtd_name;
+ sf_mtd_info.type = MTD_NORFLASH;
+ sf_mtd_info.flags = MTD_CAP_NORFLASH;
+ sf_mtd_info.writesize = 1;
+ sf_mtd_info.writebufsize = flash->page_size;
+
+ sf_mtd_info._erase = spi_flash_mtd_erase;
+ sf_mtd_info._read = spi_flash_mtd_read;
+ sf_mtd_info._write = spi_flash_mtd_write;
+ sf_mtd_info._sync = spi_flash_mtd_sync;
+
+ sf_mtd_info.size = flash->size;
+ sf_mtd_info.priv = flash;
+
+ /* Only uniform flash devices for now */
+ sf_mtd_info.numeraseregions = 0;
+ sf_mtd_info.erasesize = flash->sector_size;
+
+ return add_mtd_device(&sf_mtd_info);
+}
+
+void spi_flash_mtd_unregister(void)
+{
+ del_mtd_device(&sf_mtd_info);
+}
diff --git a/drivers/mtd/spi/sf_probe.c b/drivers/mtd/spi/sf_probe.c
index d19138d..2342972 100644
--- a/drivers/mtd/spi/sf_probe.c
+++ b/drivers/mtd/spi/sf_probe.c
@@ -397,10 +397,9 @@ int spi_flash_probe_slave(struct spi_slave *spi, struct spi_flash *flash)
if (spi_enable_wp_pin(flash))
puts("Enable WP pin failed\n");
- /* Release spi bus */
- spi_release_bus(spi);
-
- return 0;
+#ifdef CONFIG_SPI_FLASH_MTD
+ ret = spi_flash_mtd_register(flash);
+#endif
err_read_id:
spi_release_bus(spi);
@@ -450,6 +449,9 @@ struct spi_flash *spi_flash_probe_fdt(const void *blob, int slave_node,
void spi_flash_free(struct spi_flash *flash)
{
+#ifdef CONFIG_SPI_FLASH_MTD
+ spi_flash_mtd_unregister();
+#endif
spi_free_slave(flash->spi);
free(flash);
}
--
2.1.0
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