flash/nor: Make info function optional

Remove lots of no-op or dummy info function implementations and check if
it's implemented before invoking it.

Change-Id: I2144dad6a84a80359bb13a8a29a4614387e4c135
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/1642
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

src/flash/nor/aduc702x.c

@@ -352,12 +352,6 @@ static int aduc702x_probe(struct flash_bank *bank)
 	return ERROR_OK;
 }
 
-static int aduc702x_info(struct flash_bank *bank, char *buf, int buf_size)
-{
-	snprintf(buf, buf_size, "aduc702x flash driver info");
-	return ERROR_OK;
-}
-
 /* sets FEEMOD bit 3
  * enable = 1 enables writes & erases, 0 disables them */
 static int aduc702x_set_write_enable(struct target *target, int enable)
@@ -407,5 +401,4 @@ struct flash_driver aduc702x_flash = {
 	.auto_probe = aduc702x_probe,
 	.erase_check = default_flash_blank_check,
 	.protect_check = aduc702x_protect_check,
-	.info = aduc702x_info
 };

src/flash/nor/at91sam3.c

@@ -3179,16 +3179,6 @@ static int sam3_protect(struct flash_bank *bank, int set, int first, int last)
 
 }
 
-static int sam3_info(struct flash_bank *bank, char *buf, int buf_size)
-{
-	if (bank->target->state != TARGET_HALTED) {
-		LOG_ERROR("Target not halted");
-		return ERROR_TARGET_NOT_HALTED;
-	}
-	buf[0] = 0;
-	return ERROR_OK;
-}
-
 static int sam3_page_read(struct sam3_bank_private *pPrivate, unsigned pagenum, uint8_t *buf)
 {
 	uint32_t adr;
@@ -3733,5 +3723,4 @@ struct flash_driver at91sam3_flash = {
 	.auto_probe = sam3_auto_probe,
 	.erase_check = sam3_erase_check,
 	.protect_check = sam3_protect_check,
-	.info = sam3_info,
 };

src/flash/nor/at91sam4.c

@@ -1819,16 +1819,6 @@ static int sam4_protect(struct flash_bank *bank, int set, int first, int last)
 
 }
 
-static int sam4_info(struct flash_bank *bank, char *buf, int buf_size)
-{
-	if (bank->target->state != TARGET_HALTED) {
-		LOG_ERROR("Target not halted");
-		return ERROR_TARGET_NOT_HALTED;
-	}
-	buf[0] = 0;
-	return ERROR_OK;
-}
-
 static int sam4_page_read(struct sam4_bank_private *pPrivate, unsigned pagenum, uint8_t *buf)
 {
 	uint32_t adr;
@@ -2376,5 +2366,4 @@ struct flash_driver at91sam4_flash = {
 	.auto_probe = sam4_auto_probe,
 	.erase_check = default_flash_blank_check,
 	.protect_check = sam4_protect_check,
-	.info = sam4_info,
 };

src/flash/nor/dsp5680xx_flash.c

@@ -193,14 +193,6 @@ static int dsp5680xx_probe(struct flash_bank *bank)
 	return ERROR_OK;
 }
 
-static int dsp5680xx_flash_info(struct flash_bank *bank, char *buf,
-		int buf_size)
-{
-	snprintf(buf, buf_size,
-		"\ndsp5680xx flash driver info:\n - See comments in code.");
-	return ERROR_OK;
-}
-
 /**
  * The flash module (FM) on the dsp5680xx supports both individual sector
  * and mass erase of the flash memory.
@@ -277,5 +269,4 @@ struct flash_driver dsp5680xx_flash = {
 	.auto_probe = dsp5680xx_probe,
 	.erase_check = dsp5680xx_flash_erase_check,
 	.protect_check = dsp5680xx_flash_protect_check,
-	.info = dsp5680xx_flash_info
 };

src/flash/nor/em357.c

@@ -751,13 +751,6 @@ static int em357_auto_probe(struct flash_bank *bank)
 	return em357_probe(bank);
 }
 
-
-static int get_em357_info(struct flash_bank *bank, char *buf, int buf_size)
-{
-	snprintf(buf, buf_size, "em357\n");
-	return ERROR_OK;
-}
-
 COMMAND_HANDLER(em357_handle_lock_command)
 {
 	struct target *target = NULL;
@@ -946,5 +939,4 @@ struct flash_driver em357_flash = {
 	.auto_probe = em357_auto_probe,
 	.erase_check = default_flash_blank_check,
 	.protect_check = em357_protect_check,
-	.info = get_em357_info,
 };

src/flash/nor/fm3.c

@@ -760,12 +760,6 @@ static int fm3_auto_probe(struct flash_bank *bank)
 	return fm3_probe(bank);
 }
 
-static int fm3_info(struct flash_bank *bank, char *buf, int buf_size)
-{
-	snprintf(buf, buf_size, "Fujitsu fm3 Device does not support Chip-ID (Type unknown)");
-	return ERROR_OK;
-}
-
 /* Chip erase */
 static int fm3_chip_erase(struct flash_bank *bank)
 {
@@ -907,5 +901,4 @@ struct flash_driver fm3_flash = {
 	.probe = fm3_probe,
 	.auto_probe = fm3_auto_probe,
 	.erase_check = default_flash_blank_check,
-	.info = fm3_info,
 };

src/flash/nor/lpc288x.c

@@ -400,12 +400,6 @@ static int lpc288x_probe(struct flash_bank *bank)
 	return ERROR_OK;
 }
 
-static int lpc288x_info(struct flash_bank *bank, char *buf, int buf_size)
-{
-	snprintf(buf, buf_size, "lpc288x flash driver");
-	return ERROR_OK;
-}
-
 static int lpc288x_protect(struct flash_bank *bank, int set, int first, int last)
 {
 	int lockregion, status;
@@ -450,5 +444,4 @@ struct flash_driver lpc288x_flash = {
 	.auto_probe = lpc288x_probe,
 	.erase_check = lpc288x_erase_check,
 	.protect_check = lpc288x_protect_check,
-	.info = lpc288x_info,
 };

src/flash/nor/lpc2900.c

@@ -1588,19 +1588,6 @@ static int lpc2900_protect_check(struct flash_bank *bank)
 	return lpc2900_read_security_status(bank);
 }
 
-/**
- * Print info about the driver (not the device).
- *
- * @param bank Pointer to the flash bank descriptor
- * @param buf Buffer to take the string
- * @param buf_size Maximum number of characters that the buffer can take
- */
-static int lpc2900_info(struct flash_bank *bank, char *buf, int buf_size)
-{
-	snprintf(buf, buf_size, "lpc2900 flash driver");
-	return ERROR_OK;
-}
-
 struct flash_driver lpc2900_flash = {
 	.name = "lpc2900",
 	.commands = lpc2900_command_handlers,
@@ -1613,5 +1600,4 @@ struct flash_driver lpc2900_flash = {
 	.auto_probe = lpc2900_probe,
 	.erase_check = lpc2900_erase_check,
 	.protect_check = lpc2900_protect_check,
-	.info = lpc2900_info
 };

src/flash/nor/mini51.c

@@ -395,12 +395,6 @@ static int mini51_write(struct flash_bank *bank, uint8_t *buffer, uint32_t offse
 	return ERROR_OK;
 }
 
-static int get_mini51_info(struct flash_bank *bank, char *buf, int buf_size)
-{
-	snprintf(buf, buf_size, "Mini51 flash driver");
-	return ERROR_OK;
-}
-
 static int mini51_probe(struct flash_bank *bank)
 {
 	uint32_t flash_size;
@@ -454,5 +448,4 @@ struct flash_driver mini51_flash = {
 	.auto_probe = mini51_auto_probe,
 	.erase_check = default_flash_blank_check,
 	.protect_check = mini51_protect_check,
-	.info = get_mini51_info,
 };

src/flash/nor/ocl.c

@@ -321,11 +321,6 @@ static int ocl_probe(struct flash_bank *bank)
 	return ERROR_OK;
 }
 
-static int ocl_info(struct flash_bank *bank, char *buf, int buf_size)
-{
-	return ERROR_OK;
-}
-
 static int ocl_auto_probe(struct flash_bank *bank)
 {
 	struct ocl_priv *ocl = bank->driver_priv;
@@ -346,6 +341,5 @@ struct flash_driver ocl_flash = {
 	.probe = ocl_probe,
 	.erase_check = ocl_erase_check,
 	.protect_check = ocl_protect_check,
-	.info = ocl_info,
 	.auto_probe = ocl_auto_probe,
 };

src/flash/nor/str7x.c

@@ -707,12 +707,11 @@ COMMAND_HANDLER(str7x_handle_part_id_command)
 
 static int get_str7x_info(struct flash_bank *bank, char *buf, int buf_size)
 {
-	snprintf(buf, buf_size, "str7x flash driver info");
 	/* STR7x flash doesn't support sector protection interrogation.
 	 * FLASH_NVWPAR acts as a write only register; its read value
 	 * doesn't reflect the actual protection state of the sectors.
 	 */
-	LOG_WARNING("STR7x flash lock information might not be correct "
+	snprintf(buf, buf_size, "STR7x flash lock information might not be correct "
 			"due to hardware limitations.");
 	return ERROR_OK;
 }

src/flash/nor/str9x.c

@@ -606,12 +606,6 @@ COMMAND_HANDLER(str9x_handle_part_id_command)
 }
 #endif
 
-static int get_str9x_info(struct flash_bank *bank, char *buf, int buf_size)
-{
-	snprintf(buf, buf_size, "str9x flash driver info");
-	return ERROR_OK;
-}
-
 COMMAND_HANDLER(str9x_handle_flash_config_command)
 {
 	struct target *target = NULL;
@@ -686,5 +680,4 @@ struct flash_driver str9x_flash = {
 	.auto_probe = str9x_probe,
 	.erase_check = default_flash_blank_check,
 	.protect_check = str9x_protect_check,
-	.info = get_str9x_info,
 };

src/flash/nor/str9xpec.c

@@ -760,12 +760,6 @@ static int str9xpec_erase_check(struct flash_bank *bank)
 	return str9xpec_blank_check(bank, 0, bank->num_sectors - 1);
 }
 
-static int get_str9xpec_info(struct flash_bank *bank, char *buf, int buf_size)
-{
-	snprintf(buf, buf_size, "str9xpec flash driver info");
-	return ERROR_OK;
-}
-
 COMMAND_HANDLER(str9xpec_handle_flash_options_read_command)
 {
 	uint8_t status;
@@ -1215,5 +1209,4 @@ struct flash_driver str9xpec_flash = {
 	.auto_probe = str9xpec_probe,
 	.erase_check = str9xpec_erase_check,
 	.protect_check = str9xpec_protect_check,
-	.info = get_str9xpec_info,
 };

src/flash/nor/tcl.c

@@ -101,13 +101,14 @@ COMMAND_HANDLER(handle_flash_info_command)
 				protect_state);
 		}
 
-		*buf = '\0';	/* initialize buffer, otherwise it migh contain garbage if driver
+		if (p->driver->info != NULL) {
-				 *function fails */
 			retval = p->driver->info(p, buf, sizeof(buf));
+			if (retval == ERROR_OK)
 				command_print(CMD_CTX, "%s", buf);
-		if (retval != ERROR_OK)
+			else
 				LOG_ERROR("error retrieving flash info");
 		}
+	}
 
 	return retval;
 }