Extend the 'eeprom' command to allow accessing EEPROMs probed via driver model, uclass UCLASS_I2C_EEPROM.
When the CONFIG_I2C_EEPROM config option is enabled (and so the i2c-eeprom driver is built), the 'eeprom' command now accepts driver model device name as EEPROM specifier for the 'eeprom' command, in addition to the legacy [[bus] devaddr] specifier.
Moreover if no device specifier is given, then the first UCLASS_I2C_EEPROM device is used, if found.
Signed-off-by: Marek Behún kabel@kernel.org --- cmd/eeprom.c | 122 ++++++++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 112 insertions(+), 10 deletions(-)
diff --git a/cmd/eeprom.c b/cmd/eeprom.c index 9c4af88738..a39fc5ffdc 100644 --- a/cmd/eeprom.c +++ b/cmd/eeprom.c @@ -22,8 +22,10 @@ #include <common.h> #include <config.h> #include <command.h> +#include <dm.h> #include <eeprom.h> #include <i2c.h> +#include <i2c_eeprom.h> #include <eeprom_layout.h> #include <linux/delay.h>
@@ -209,10 +211,41 @@ static long parse_numeric_param(char *str) }
struct eeprom_dev_spec { +#if CONFIG_IS_ENABLED(I2C_EEPROM) + struct udevice *dev; +#endif int i2c_bus; ulong i2c_addr; };
+static void eeprom_dev_spec_init(struct eeprom_dev_spec *dev) +{ +#if CONFIG_IS_ENABLED(I2C_EEPROM) + if (!dev->dev) +#endif + eeprom_init(dev->i2c_bus); +} + +static int eeprom_dev_spec_read(struct eeprom_dev_spec *dev, + unsigned offset, uchar *buffer, unsigned cnt) +{ +#if CONFIG_IS_ENABLED(I2C_EEPROM) + if (dev->dev) + return i2c_eeprom_read(dev->dev, offset, buffer, cnt); +#endif + return eeprom_read(dev->i2c_addr, offset, buffer, cnt); +} + +static int eeprom_dev_spec_write(struct eeprom_dev_spec *dev, + unsigned offset, uchar *buffer, unsigned cnt) +{ +#if CONFIG_IS_ENABLED(I2C_EEPROM) + if (dev->dev) + return i2c_eeprom_write(dev->dev, offset, buffer, cnt); +#endif + return eeprom_write(dev->i2c_addr, offset, buffer, cnt); +} + /** * parse_eeprom_dev_spec - parse the eeprom device specifier * @@ -226,6 +259,28 @@ struct eeprom_dev_spec { static int parse_eeprom_dev_spec(struct eeprom_dev_spec *dev, int argc, char *const argv[]) { +#if CONFIG_IS_ENABLED(I2C_EEPROM) + if (argc == 0) { + if (!uclass_first_device_err(UCLASS_I2C_EEPROM, &dev->dev)) + return 0; + } + + if (argc == 1) { + if (!uclass_get_device_by_name(UCLASS_I2C_EEPROM, argv[0], + &dev->dev)) + return 1; + + /* + * If we could not find the device by name and the parameter is + * not numeric (and so won't be handled later), fail. + */ + if (parse_numeric_param(argv[0]) == -1) { + printf("Can't get eeprom device: %s\n", argv[0]); + return CMD_RET_USAGE; + } + } +#endif + #ifdef CONFIG_SYS_I2C_EEPROM_ADDR if (argc == 0) { dev->i2c_bus = -1; @@ -265,6 +320,7 @@ static unsigned char eeprom_buf[CONFIG_SYS_EEPROM_SIZE]; #endif
enum eeprom_action { + EEPROM_LIST, EEPROM_READ, EEPROM_WRITE, EEPROM_PRINT, @@ -274,6 +330,10 @@ enum eeprom_action {
static enum eeprom_action parse_action(char *cmd) { +#if CONFIG_IS_ENABLED(I2C_EEPROM) + if (!strncmp(cmd, "list", 4)) + return EEPROM_LIST; +#endif if (!strncmp(cmd, "read", 4)) return EEPROM_READ; if (!strncmp(cmd, "write", 5)) @@ -288,6 +348,24 @@ static enum eeprom_action parse_action(char *cmd) return EEPROM_ACTION_INVALID; }
+#if CONFIG_IS_ENABLED(I2C_EEPROM) +static int do_eeprom_list(void) +{ + struct udevice *dev; + struct uclass *uc; + int err; + + err = uclass_get(UCLASS_I2C_EEPROM, &uc); + if (err) + return CMD_RET_FAILURE; + + uclass_foreach_dev(dev, uc) + printf("%s (%s)\n", dev->name, dev->driver->name); + + return CMD_RET_SUCCESS; +} +#endif + static int do_eeprom_rw(struct eeprom_dev_spec *dev, bool read, ulong addr, ulong off, ulong cnt) { @@ -298,9 +376,9 @@ static int do_eeprom_rw(struct eeprom_dev_spec *dev, bool read,
printf(fmt, dev->i2c_addr, read ? "read" : "write", addr, off, cnt); if (read) - ret = eeprom_read(dev->i2c_addr, off, memloc, cnt); + ret = eeprom_dev_spec_read(dev, off, memloc, cnt); else - ret = eeprom_write(dev->i2c_addr, off, memloc, cnt); + ret = eeprom_dev_spec_write(dev, off, memloc, cnt); puts("done\n");
return ret; @@ -314,7 +392,7 @@ static int do_eeprom_layout(struct eeprom_dev_spec *dev, int layout_ver, eeprom_layout_setup(layout, eeprom_buf, CONFIG_SYS_EEPROM_SIZE, layout_ver);
- return eeprom_read(dev->i2c_addr, 0, eeprom_buf, layout->data_size); + return eeprom_dev_spec_read(dev, 0, eeprom_buf, layout->data_size); }
static int do_eeprom_print(struct eeprom_dev_spec *dev, int layout_ver) @@ -345,7 +423,7 @@ static int do_eeprom_update(struct eeprom_dev_spec *dev, int layout_ver, if (ret) return CMD_RET_FAILURE;
- return eeprom_write(dev->i2c_addr, 0, layout.data, layout.data_size); + return eeprom_dev_spec_write(dev, 0, layout.data, layout.data_size); }
#endif @@ -353,6 +431,8 @@ static int do_eeprom_update(struct eeprom_dev_spec *dev, int layout_ver, static int eeprom_action_expected_argc(enum eeprom_action action) { switch (action) { + case EEPROM_LIST: + return 0; case EEPROM_READ: case EEPROM_WRITE: return 3; @@ -389,6 +469,11 @@ int do_eeprom(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) if (action == EEPROM_ACTION_INVALID) return CMD_RET_USAGE;
+#if CONFIG_IS_ENABLED(I2C_EEPROM) + if (action == EEPROM_LIST) + return do_eeprom_list(); +#endif + #ifdef CONFIG_EEPROM_LAYOUT_VERSIONS if (action == EEPROM_PRINT || action == EEPROM_UPDATE) { if (!strcmp(argv[index], "-l")) { @@ -425,7 +510,7 @@ int do_eeprom(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) } #endif
- eeprom_init(dev.i2c_bus); + eeprom_dev_spec_init(&dev);
switch (action) { case EEPROM_READ: @@ -450,19 +535,37 @@ int do_eeprom(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]) #define EEPROM_LAYOUT_SPEC "" #endif
+#if CONFIG_IS_ENABLED(I2C_EEPROM) +# define EEPROM_DEV_SPEC "[device_specifier]" +#else +# define EEPROM_DEV_SPEC "[[bus] devaddr]" +#endif + U_BOOT_CMD( eeprom, 8, 1, do_eeprom, "EEPROM sub-system", - "read [[bus] devaddr] addr off cnt\n" - "eeprom write [[bus] devaddr] addr off cnt\n" +#if CONFIG_IS_ENABLED(I2C_EEPROM) + "list\n" + "eeprom " +#endif + "read " EEPROM_DEV_SPEC " addr off cnt\n" + "eeprom write " EEPROM_DEV_SPEC " addr off cnt\n" " - read/write `cnt' bytes from `devaddr` EEPROM at offset `off'" #ifdef CONFIG_CMD_EEPROM_LAYOUT "\n" - "eeprom print " EEPROM_LAYOUT_SPEC "[[bus] devaddr]\n" + "eeprom print " EEPROM_LAYOUT_SPEC EEPROM_DEV_SPEC "\n" " - Print layout fields and their data in human readable format\n" - "eeprom update " EEPROM_LAYOUT_SPEC "[[bus] devaddr] field_name field_value\n" + "eeprom update " EEPROM_LAYOUT_SPEC EEPROM_DEV_SPEC " field_name field_value\n" " - Update a specific eeprom field with new data.\n" " The new data must be written in the same human readable format as shown by the print command." +#endif +#if CONFIG_IS_ENABLED(I2C_EEPROM) + "\n\n" + "DEVICE SPECIFIER - the eeprom device can be specified\n" + " [dev_name] - by device name (devices can listed with the eeprom list command)\n" + " [[bus] devaddr] - or by I2C bus and I2C device address\n" + "If no device specifier is given, the first driver-model found device is used." +#endif #ifdef CONFIG_EEPROM_LAYOUT_VERSIONS "\n\n" "LAYOUT VERSIONS\n" @@ -471,5 +574,4 @@ U_BOOT_CMD( "The values which can be provided with the -l option are:\n" CONFIG_EEPROM_LAYOUT_HELP_STRING"\n" #endif -#endif );