[U-Boot] [PATCH v1 1/2] cmd_sf: Add command "sf info" to show current device info

[Haikun Wang]

Add command "sf info" to show the information of the current SPI flash device.

Signed-off-by: Haikun Wang <haikun.wang at freescale.com>
---
In current sf driver, we show the debug information during the flash probe
period.

In case of without DM SPI, we need to run command "sf probe" to get the debug
information of the current SPI flash device. "sf probe" will re-identify the
device every time and it reduce the efficiency. We can get the debug information
without any re-identify process using "sf info".

In case of using DM SPI, if we disable CONFIG_DM_DEVICE_REMOVE "sf probe" will
only call the flash driver's probe function the first time you run it and no
information will show after the first. It is recommended that only call the
flash driver's probe function once during u-boot period. You can get the debug
information using "sf info" in this case.

Changes in v1: None.

 common/cmd_sf.c | 43 ++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 42 insertions(+), 1 deletion(-)

diff --git a/common/cmd_sf.c b/common/cmd_sf.c
index 6aabf39..38841fa 100644
--- a/common/cmd_sf.c
+++ b/common/cmd_sf.c
@@ -503,6 +503,44 @@ static int do_spi_flash_test(int argc, char * const argv[])
 }
 #endif /* CONFIG_CMD_SF_TEST */
 
+static int do_spi_flash_info(struct spi_flash *flash, bool dm_column_style)
+{
+	if (dm_column_style) {
+		struct udevice *bus;
+		struct udevice *dev;
+		struct dm_spi_slave_platdata *plat;
+
+		dev = flash->dev;
+		bus = dev->parent;
+		plat = dev_get_parent_platdata(dev);
+
+		printf("Device: %s\n", dev->name);
+		printf("Chipselect: %d\n", plat->cs);
+		printf("Bind Driver: %s\n", dev->driver->name);
+		printf("SPI bus: %s\n", bus->name);
+		printf("SPI bus number: %d\n", bus->seq);
+		printf("Flash type: %s\n", flash->name);
+		printf("Page size: ");
+		print_size(flash->page_size, "\n");
+		printf("Erase size: ");
+		print_size(flash->erase_size, "\n");
+		printf("Total size: ");
+		print_size(flash->size, "\n");
+		if (flash->memory_map)
+			printf("Mapped at %p\n", flash->memory_map);
+	} else {
+		printf("SF: Detected %s with page size ", flash->name);
+		print_size(flash->page_size, ", erase size ");
+		print_size(flash->erase_size, ", total ");
+		print_size(flash->size, "");
+		if (flash->memory_map)
+			printf(", mapped at %p", flash->memory_map);
+		puts("\n");
+	}
+
+	return 0;
+}
+
 static int do_spi_flash(cmd_tbl_t *cmdtp, int flag, int argc,
 			char * const argv[])
 {
@@ -537,6 +575,8 @@ static int do_spi_flash(cmd_tbl_t *cmdtp, int flag, int argc,
 	else if (!strcmp(cmd, "test"))
 		ret = do_spi_flash_test(argc, argv);
 #endif
+	else if (!strcmp(cmd, "info"))
+		ret = do_spi_flash_info(flash, IS_ENABLED(CONFIG_DM_SPI_FLASH));
 	else
 		ret = -1;
 
@@ -567,6 +607,7 @@ U_BOOT_CMD(
 	"sf erase offset [+]len		- erase `len' bytes from `offset'\n"
 	"				  `+len' round up `len' to block size\n"
 	"sf update addr offset len	- erase and write `len' bytes from memory\n"
-	"				  at `addr' to flash at `offset'"
+	"				  at `addr' to flash at `offset'\n"
+	"sf info - display info of the current SPI Flash device\n"
 	SF_TEST_HELP
 );
-- 
2.1.0.27.g96db324