flash/nor: make all working area pointers local

[openocd.git] / src / flash / nor / stm32f2x.c

diff --git a/src/flash/nor/stm32f2x.c b/src/flash/nor/stm32f2x.c
index 5f5bfb853aa5f01d6a1a8908fb2fe861ca20b661..dbecc26fd151374e502371339e0c0d6977c75659 100644 (file)
--- a/src/flash/nor/stm32f2x.c
+++ b/src/flash/nor/stm32f2x.c
@@ -150,7 +150,6 @@
 #define KEY2                   0xCDEF89AB
 
 struct stm32x_flash_bank {
-       struct working_area *write_algorithm;
        int probed;
 };
 
@@ -167,7 +166,6 @@ FLASH_BANK_COMMAND_HANDLER(stm32x_flash_bank_command)
        stm32x_info = malloc(sizeof(struct stm32x_flash_bank));
        bank->driver_priv = stm32x_info;
 
-       stm32x_info->write_algorithm = NULL;
        stm32x_info->probed = 0;
 
        return ERROR_OK;
@@ -316,9 +314,9 @@ static int stm32x_protect(struct flash_bank *bank, int set, int first, int last)
 static int stm32x_write_block(struct flash_bank *bank, uint8_t *buffer,
                uint32_t offset, uint32_t count)
 {
-       struct stm32x_flash_bank *stm32x_info = bank->driver_priv;
        struct target *target = bank->target;
        uint32_t buffer_size = 16384;
+       struct working_area *write_algorithm;
        struct working_area *source;
        uint32_t address = bank->base + offset;
        struct reg_param reg_params[5];
@@ -366,12 +364,12 @@ static int stm32x_write_block(struct flash_bank *bank, uint8_t *buffer,
        };
 
        if (target_alloc_working_area(target, sizeof(stm32x_flash_write_code),
-                       &stm32x_info->write_algorithm) != ERROR_OK) {
+                       &write_algorithm) != ERROR_OK) {
                LOG_WARNING("no working area available, can't do block memory writes");
                return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
        };
 
-       retval = target_write_buffer(target, stm32x_info->write_algorithm->address,
+       retval = target_write_buffer(target, write_algorithm->address,
                        sizeof(stm32x_flash_write_code),
                        (uint8_t *)stm32x_flash_write_code);
        if (retval != ERROR_OK)
@@ -381,10 +379,9 @@ static int stm32x_write_block(struct flash_bank *bank, uint8_t *buffer,
        while (target_alloc_working_area_try(target, buffer_size, &source) != ERROR_OK) {
                buffer_size /= 2;
                if (buffer_size <= 256) {
-                       /* if we already allocated the writing code, but failed to get a
+                       /* we already allocated the writing code, but failed to get a
                         * buffer, free the algorithm */
-                       if (stm32x_info->write_algorithm)
-                               target_free_working_area(target, stm32x_info->write_algorithm);
+                       target_free_working_area(target, write_algorithm);
 
                        LOG_WARNING("no large enough working area available, can't do block memory writes");
                        return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
@@ -410,7 +407,7 @@ static int stm32x_write_block(struct flash_bank *bank, uint8_t *buffer,
                        0, NULL,
                        5, reg_params,
                        source->address, source->size,
-                       stm32x_info->write_algorithm->address, 0,
+                       write_algorithm->address, 0,
                        &armv7m_info);
 
        if (retval == ERROR_FLASH_OPERATION_FAILED) {
@@ -430,7 +427,7 @@ static int stm32x_write_block(struct flash_bank *bank, uint8_t *buffer,
        }
 
        target_free_working_area(target, source);
-       target_free_working_area(target, stm32x_info->write_algorithm);
+       target_free_working_area(target, write_algorithm);
 
        destroy_reg_param(&reg_params[0]);
        destroy_reg_param(&reg_params[1]);
@@ -586,6 +583,7 @@ static int stm32x_probe(struct flash_bank *bank)
        struct stm32x_flash_bank *stm32x_info = bank->driver_priv;
        int i;
        uint16_t flash_size_in_kb;
+       uint16_t max_flash_size_in_kb;
        uint32_t device_id;
        uint32_t base_address = 0x08000000;
 
@@ -597,36 +595,26 @@ static int stm32x_probe(struct flash_bank *bank)
                return retval;
        LOG_INFO("device id = 0x%08" PRIx32 "", device_id);
 
-       /* get flash size from target. */
-       retval = target_read_u16(target, 0x1FFF7A22, &flash_size_in_kb);
-       if (retval != ERROR_OK) {
-               LOG_WARNING("failed reading flash size, default to max target family");
-               /* failed reading flash size, default to max target family */
-               flash_size_in_kb = 0xffff;
+       /* set max flash size depending on family */
+       switch (device_id & 0xfff) {
+       case 0x411:
+       case 0x413:
+               max_flash_size_in_kb = 1024;
+               break;
+       default:
+               LOG_WARNING("Cannot identify target as a STM32 family.");
+               return ERROR_FAIL;
        }
 
-       /* some variants read 0 for flash size register
-        * use a max flash size as a default */
-       if (flash_size_in_kb == 0)
-               flash_size_in_kb = 0xffff;
+       /* get flash size from target. */
+       retval = target_read_u16(target, 0x1FFF7A22, &flash_size_in_kb);
 
-       if ((device_id & 0xfff) == 0x411) {
-               /* check for early silicon */
-               if (flash_size_in_kb == 0xffff) {
-                       /* number of sectors may be incorrrect on early silicon */
-                       LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming 1024k flash");
-                       flash_size_in_kb = 1024;
-               }
-       } else if ((device_id & 0xfff) == 0x413) {
-               /* check for early silicon */
-               if (flash_size_in_kb == 0xffff) {
-                       /* number of sectors may be incorrrect on early silicon */
-                       LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming 1024k flash");
-                       flash_size_in_kb = 1024;
-               }
-       } else {
-               LOG_WARNING("Cannot identify target as a STM32 family.");
-               return ERROR_FAIL;
+       /* failed reading flash size or flash size invalid (early silicon),
+        * default to max target family */
+       if (retval != ERROR_OK || flash_size_in_kb == 0xffff || flash_size_in_kb == 0) {
+               LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming %dk flash",
+                       max_flash_size_in_kb);
+               flash_size_in_kb = max_flash_size_in_kb;
        }
 
        LOG_INFO("flash size = %dkbytes", flash_size_in_kb);