flash/nor/at91sam: implement flash bank deallocation for SAM series

Microchip (former Atmel) SAM drivers allocate a struct per chip.

at91sam3, at91sam34:
Deallocate all chip structs from the list at once, on the first bank
deallocation.

at91samd and at91sam4l drivers do not handle more than one bank.
Convert them to simple driver_priv allocation and use
default_flash_free_driver_priv().

Change-Id: I49d7200f38a4568c7e12f306c27d1b1b72646736
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: http://openocd.zylin.com/4416
Tested-by: jenkins

src/flash/nor/at91sam3.c

@@ -3117,6 +3117,22 @@ FLASH_BANK_COMMAND_HANDLER(sam3_flash_bank_command)
 	return ERROR_OK;
 }
 
+/**
+ * Remove all chips from the internal list without distingushing which one
+ * is owned by this bank. This simplification works only for one shot
+ * deallocation like current flash_free_all_banks()
+ */
+void sam3_free_driver_priv(struct flash_bank *bank)
+{
+	struct sam3_chip *chip = all_sam3_chips;
+	while (chip) {
+		struct sam3_chip *next = chip->next;
+		free(chip);
+		chip = next;
+	}
+	all_sam3_chips = NULL;
+}
+
 static int sam3_GetDetails(struct sam3_bank_private *pPrivate)
 {
 	const struct sam3_chip_details *pDetails;
@@ -3771,4 +3787,5 @@ struct flash_driver at91sam3_flash = {
 	.auto_probe = sam3_auto_probe,
 	.erase_check = sam3_erase_check,
 	.protect_check = sam3_protect_check,
+	.free_driver_priv = sam3_free_driver_priv,
 };

src/flash/nor/at91sam4.c

@@ -2514,6 +2514,22 @@ FLASH_BANK_COMMAND_HANDLER(sam4_flash_bank_command)
 	return ERROR_OK;
 }
 
+/**
+ * Remove all chips from the internal list without distingushing which one
+ * is owned by this bank. This simplification works only for one shot
+ * deallocation like current flash_free_all_banks()
+ */
+static void sam4_free_driver_priv(struct flash_bank *bank)
+{
+	struct sam4_chip *chip = all_sam4_chips;
+	while (chip) {
+		struct sam4_chip *next = chip->next;
+		free(chip);
+		chip = next;
+	}
+	all_sam4_chips = NULL;
+}
+
 static int sam4_GetDetails(struct sam4_bank_private *pPrivate)
 {
 	const struct sam4_chip_details *pDetails;
@@ -3194,4 +3210,5 @@ struct flash_driver at91sam4_flash = {
 	.auto_probe = sam4_auto_probe,
 	.erase_check = default_flash_blank_check,
 	.protect_check = sam4_protect_check,
+	.free_driver_priv = sam4_free_driver_priv,
 };

src/flash/nor/at91sam4l.c

@@ -129,10 +129,8 @@ struct sam4l_info {
 
 	bool probed;
 	struct target *target;
-	struct sam4l_info *next;
 };
 
-static struct sam4l_info *sam4l_chips;
 
 static int sam4l_flash_wait_until_ready(struct target *target)
 {
@@ -204,30 +202,6 @@ static int sam4l_flash_command(struct target *target, uint8_t cmd, int page)
 
 FLASH_BANK_COMMAND_HANDLER(sam4l_flash_bank_command)
 {
-	struct sam4l_info *chip = sam4l_chips;
-
-	while (chip) {
-		if (chip->target == bank->target)
-			break;
-		chip = chip->next;
-	}
-
-	if (!chip) {
-		/* Create a new chip */
-		chip = calloc(1, sizeof(*chip));
-		if (!chip)
-			return ERROR_FAIL;
-
-		chip->target = bank->target;
-		chip->probed = false;
-
-		bank->driver_priv = chip;
-
-		/* Insert it into the chips list (at head) */
-		chip->next = sam4l_chips;
-		sam4l_chips = chip;
-	}
-
 	if (bank->base != SAM4L_FLASH) {
 		LOG_ERROR("Address 0x%08" PRIx32 " invalid bank address (try 0x%08" PRIx32
 				"[at91sam4l series] )",
@@ -235,6 +209,18 @@ FLASH_BANK_COMMAND_HANDLER(sam4l_flash_bank_command)
 		return ERROR_FAIL;
 	}
 
+	struct sam4l_info *chip;
+	chip = calloc(1, sizeof(*chip));
+	if (!chip) {
+		LOG_ERROR("No memory for flash bank chip info");
+		return ERROR_FAIL;
+	}
+
+	chip->target = bank->target;
+	chip->probed = false;
+
+	bank->driver_priv = chip;
+
 	return ERROR_OK;
 }
 
@@ -396,7 +382,7 @@ static int sam4l_protect_check(struct flash_bank *bank)
 
 static int sam4l_protect(struct flash_bank *bank, int set, int first, int last)
 {
-	struct sam4l_info *chip = sam4l_chips;
+	struct sam4l_info *chip = (struct sam4l_info *)bank->driver_priv;
 
 	if (bank->target->state != TARGET_HALTED) {
 		LOG_ERROR("Target not halted");
@@ -709,4 +695,5 @@ struct flash_driver at91sam4l_flash = {
 	.auto_probe = sam4l_probe,
 	.erase_check = default_flash_blank_check,
 	.protect_check = sam4l_protect_check,
+	.free_driver_priv = default_flash_free_driver_priv,
 };

src/flash/nor/at91samd.c

@@ -304,10 +304,8 @@ struct samd_info {
 
 	bool probed;
 	struct target *target;
-	struct samd_info *next;
 };
 
-static struct samd_info *samd_chips;
 
 /**
  * Gives the family structure to specific device id.
@@ -876,30 +874,6 @@ free_pb:
 
 FLASH_BANK_COMMAND_HANDLER(samd_flash_bank_command)
 {
-	struct samd_info *chip = samd_chips;
-
-	while (chip) {
-		if (chip->target == bank->target)
-			break;
-		chip = chip->next;
-	}
-
-	if (!chip) {
-		/* Create a new chip */
-		chip = calloc(1, sizeof(*chip));
-		if (!chip)
-			return ERROR_FAIL;
-
-		chip->target = bank->target;
-		chip->probed = false;
-
-		bank->driver_priv = chip;
-
-		/* Insert it into the chips list (at head) */
-		chip->next = samd_chips;
-		samd_chips = chip;
-	}
-
 	if (bank->base != SAMD_FLASH) {
 		LOG_ERROR("Address 0x%08" PRIx32 " invalid bank address (try 0x%08" PRIx32
 				"[at91samd series] )",
@@ -907,6 +881,18 @@ FLASH_BANK_COMMAND_HANDLER(samd_flash_bank_command)
 		return ERROR_FAIL;
 	}
 
+	struct samd_info *chip;
+	chip = calloc(1, sizeof(*chip));
+	if (!chip) {
+		LOG_ERROR("No memory for flash bank chip info");
+		return ERROR_FAIL;
+	}
+
+	chip->target = bank->target;
+	chip->probed = false;
+
+	bank->driver_priv = chip;
+
 	return ERROR_OK;
 }
 
@@ -1281,4 +1267,5 @@ struct flash_driver at91samd_flash = {
 	.auto_probe = samd_probe,
 	.erase_check = default_flash_blank_check,
 	.protect_check = samd_protect_check,
+	.free_driver_priv = default_flash_free_driver_priv,
 };