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

1 files changed, 17 insertions, 0 deletions

diff --git a/src/flash/nor/at91sam4.c b/src/flash/nor/at91sam4.c
index d101c9b4..04752169 100644
--- a/src/flash/nor/at91sam4.c
+++ b/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,
 };