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Diffstat (limited to 'src/flash/nor/stm32lx.c')
-rw-r--r--src/flash/nor/stm32lx.c232
1 files changed, 85 insertions, 147 deletions
diff --git a/src/flash/nor/stm32lx.c b/src/flash/nor/stm32lx.c
index 8ba2b83..58a2a80 100644
--- a/src/flash/nor/stm32lx.c
+++ b/src/flash/nor/stm32lx.c
@@ -23,6 +23,7 @@
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
+
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
@@ -117,8 +118,7 @@ static int stm32lx_enable_write_half_page(struct flash_bank *bank);
static int stm32lx_erase_sector(struct flash_bank *bank, int sector);
static int stm32lx_wait_until_bsy_clear(struct flash_bank *bank);
-struct stm32lx_flash_bank
-{
+struct stm32lx_flash_bank {
struct working_area *write_algorithm;
int probed;
};
@@ -129,16 +129,13 @@ FLASH_BANK_COMMAND_HANDLER(stm32lx_flash_bank_command)
{
struct stm32lx_flash_bank *stm32lx_info;
if (CMD_ARGC < 6)
- {
return ERROR_COMMAND_SYNTAX_ERROR;
- }
- // Create the bank structure
+ /* Create the bank structure */
stm32lx_info = malloc(sizeof(struct stm32lx_flash_bank));
- // Check allocation
- if (stm32lx_info == NULL)
- {
+ /* Check allocation */
+ if (stm32lx_info == NULL) {
LOG_ERROR("failed to allocate bank structure");
return ERROR_FAIL;
}
@@ -158,8 +155,7 @@ static int stm32lx_protect_check(struct flash_bank *bank)
uint32_t wrpr;
- if (target->state != TARGET_HALTED)
- {
+ if (target->state != TARGET_HALTED) {
LOG_ERROR("Target not halted");
return ERROR_TARGET_NOT_HALTED;
}
@@ -172,16 +168,11 @@ static int stm32lx_protect_check(struct flash_bank *bank)
if (retval != ERROR_OK)
return retval;
- for (int i = 0; i < 32; i++)
- {
+ for (int i = 0; i < 32; i++) {
if (wrpr & (1 << i))
- {
bank->sectors[i].is_protected = 1;
- }
else
- {
bank->sectors[i].is_protected = 0;
- }
}
return ERROR_OK;
}
@@ -195,8 +186,7 @@ static int stm32lx_erase(struct flash_bank *bank, int first, int last)
* erased, but it is not implemented yet.
*/
- if (bank->target->state != TARGET_HALTED)
- {
+ if (bank->target->state != TARGET_HALTED) {
LOG_ERROR("Target not halted");
return ERROR_TARGET_NOT_HALTED;
}
@@ -204,8 +194,7 @@ static int stm32lx_erase(struct flash_bank *bank, int first, int last)
/*
* Loop over the selected sectors and erase them
*/
- for (int i = first; i <= last; i++)
- {
+ for (int i = first; i <= last; i++) {
retval = stm32lx_erase_sector(bank, i);
if (retval != ERROR_OK)
return retval;
@@ -238,72 +227,66 @@ static int stm32lx_write_half_pages(struct flash_bank *bank, uint8_t *buffer,
/* see contib/loaders/flash/stm32lx.s for src */
- static const uint16_t stm32lx_flash_write_code_16[] =
- {
- // 00000000 <write_word-0x4>:
- 0x2300, // 0: 2300 movs r3, #0
- 0xe004, // 2: e004 b.n e <test_done>
+ static const uint16_t stm32lx_flash_write_code_16[] = {
+ /* 00000000 <write_word-0x4>: */
+ 0x2300, /* 0: 2300 movs r3, #0 */
+ 0xe004, /* 2: e004 b.n e <test_done> */
- // 00000004 <write_word>:
- 0xf851, 0xcb04, // 4: f851 cb04 ldr.w ip, [r1], #4
- 0xf840, 0xcb04, // 8: f840 cb04 str.w ip, [r0], #4
- 0x3301, // c: 3301 adds r3, #1
+ /* 00000004 <write_word>: */
+ 0xf851, 0xcb04, /* 4: f851 cb04 ldr.w ip, [r1], #4 */
+ 0xf840, 0xcb04, /* 8: f840 cb04 str.w ip, [r0], #4 */
+ 0x3301, /* c: 3301 adds r3, #1 */
- // 0000000e <test_done>:
- 0x4293, // e: 4293 cmp r3, r2
- 0xd3f8, // 10: d3f8 bcc.n 4 <write_word>
- 0xbe00, // 12: be00 bkpt 0x0000
+ /* 0000000e <test_done>: */
+ 0x4293, /* e: 4293 cmp r3, r2 */
+ 0xd3f8, /* 10: d3f8 bcc.n 4 <write_word> */
+ 0xbe00, /* 12: be00 bkpt 0x0000 */
};
- // Flip endian
+ /* Flip endian */
uint8_t stm32lx_flash_write_code[sizeof(stm32lx_flash_write_code_16)];
- for (unsigned int i = 0; i < sizeof(stm32lx_flash_write_code_16) / 2; i++)
- {
+ for (unsigned int i = 0; i < sizeof(stm32lx_flash_write_code_16) / 2; i++) {
stm32lx_flash_write_code[i * 2 + 0] = stm32lx_flash_write_code_16[i]
& 0xff;
stm32lx_flash_write_code[i * 2 + 1] = (stm32lx_flash_write_code_16[i]
>> 8) & 0xff;
}
- // Check if there is an even number of half pages (128bytes)
- if (count % 128)
- {
+ /* Check if there is an even number of half pages (128bytes) */
+ if (count % 128) {
LOG_ERROR("there should be an even number "
"of half pages = 128 bytes (count = %" PRIi32 " bytes)", count);
return ERROR_FAIL;
}
- // Allocate working area
+ /* Allocate working area */
reg32 = sizeof(stm32lx_flash_write_code);
- // Add bytes to make 4byte aligned
+ /* Add bytes to make 4byte aligned */
reg32 += (4 - (reg32 % 4)) % 4;
retval = target_alloc_working_area(target, reg32,
&stm32lx_info->write_algorithm);
if (retval != ERROR_OK)
return retval;
- // Write the flashing code
+ /* Write the flashing code */
retval = target_write_buffer(target,
stm32lx_info->write_algorithm->address,
sizeof(stm32lx_flash_write_code),
- (uint8_t*) stm32lx_flash_write_code);
- if (retval != ERROR_OK)
- {
+ (uint8_t *)stm32lx_flash_write_code);
+ if (retval != ERROR_OK) {
target_free_working_area(target, stm32lx_info->write_algorithm);
return retval;
}
- // Allocate half pages memory
+ /* Allocate half pages memory */
while (target_alloc_working_area_try(target, buffer_size, &source)
- != ERROR_OK)
- {
+ != ERROR_OK) {
if (buffer_size > 1024)
buffer_size -= 1024;
else
buffer_size /= 2;
- if (buffer_size <= 256)
- {
+ if (buffer_size <= 256) {
/* if we already allocated the writing code, but failed to get a
* buffer, free the algorithm */
if (stm32lx_info->write_algorithm)
@@ -323,11 +306,9 @@ static int stm32lx_write_half_pages(struct flash_bank *bank, uint8_t *buffer,
init_reg_param(&reg_params[3], "r3", 32, PARAM_IN_OUT);
init_reg_param(&reg_params[4], "r4", 32, PARAM_OUT);
- // Enable half-page write
+ /* Enable half-page write */
retval = stm32lx_enable_write_half_page(bank);
- if (retval != ERROR_OK)
- {
-
+ if (retval != ERROR_OK) {
target_free_working_area(target, source);
target_free_working_area(target, stm32lx_info->write_algorithm);
@@ -335,38 +316,36 @@ static int stm32lx_write_half_pages(struct flash_bank *bank, uint8_t *buffer,
destroy_reg_param(&reg_params[1]);
destroy_reg_param(&reg_params[2]);
destroy_reg_param(&reg_params[3]);
-
return retval;
}
- // Loop while there are bytes to write
- while (count > 0)
- {
+ /* Loop while there are bytes to write */
+ while (count > 0) {
uint32_t this_count;
this_count = (count > buffer_size) ? buffer_size : count;
- // Write the next half pages
+ /* Write the next half pages */
retval = target_write_buffer(target, source->address, this_count,
buffer);
if (retval != ERROR_OK)
break;
- // 4: Store useful information in the registers
- // the destination address of the copy (R0)
+ /* 4: Store useful information in the registers */
+ /* the destination address of the copy (R0) */
buf_set_u32(reg_params[0].value, 0, 32, address);
- // The source address of the copy (R1)
+ /* The source address of the copy (R1) */
buf_set_u32(reg_params[1].value, 0, 32, source->address);
- // The length of the copy (R2)
+ /* The length of the copy (R2) */
buf_set_u32(reg_params[2].value, 0, 32, this_count / 4);
- // 5: Execute the bunch of code
+ /* 5: Execute the bunch of code */
retval = target_run_algorithm(target, 0, NULL, sizeof(reg_params)
/ sizeof(*reg_params), reg_params,
stm32lx_info->write_algorithm->address, 0, 20000, &armv7m_info);
if (retval != ERROR_OK)
break;
- // 6: Wait while busy
+ /* 6: Wait while busy */
retval = stm32lx_wait_until_bsy_clear(bank);
if (retval != ERROR_OK)
break;
@@ -401,34 +380,28 @@ static int stm32lx_write(struct flash_bank *bank, uint8_t *buffer,
uint32_t bytes_written = 0;
int retval;
- if (bank->target->state != TARGET_HALTED)
- {
+ if (bank->target->state != TARGET_HALTED) {
LOG_ERROR("Target not halted");
return ERROR_TARGET_NOT_HALTED;
}
- if (offset & 0x1)
- {
+ if (offset & 0x1) {
LOG_ERROR("offset 0x%" PRIx32 " breaks required 2-byte alignment", offset);
return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
}
- // Check if there are some full half pages
- if (((offset % 128) == 0) && (count >= 128))
- {
+ /* Check if there are some full half pages */
+ if (((offset % 128) == 0) && (count >= 128)) {
halfpages_number = count / 128;
words_remaining = (count - 128 * halfpages_number) / 4;
bytes_remaining = (count & 0x3);
- }
- else
- {
+ } else {
halfpages_number = 0;
words_remaining = (count / 4);
bytes_remaining = (count & 0x3);
}
- if (halfpages_number)
- {
+ if (halfpages_number) {
retval = stm32lx_write_half_pages(bank, buffer, offset, 128
* halfpages_number);
if (retval != ERROR_OK)
@@ -441,12 +414,11 @@ static int stm32lx_write(struct flash_bank *bank, uint8_t *buffer,
if (retval != ERROR_OK)
return retval;
- while (words_remaining > 0)
- {
+ while (words_remaining > 0) {
uint32_t value;
- uint8_t* p = buffer + bytes_written;
+ uint8_t *p = buffer + bytes_written;
- // Prepare the word, Little endian conversion
+ /* Prepare the word, Little endian conversion */
value = p[0] + (p[1] << 8) + (p[2] << 16) + (p[3] << 24);
retval = target_write_u32(target, address, value);
@@ -462,8 +434,7 @@ static int stm32lx_write(struct flash_bank *bank, uint8_t *buffer,
return retval;
}
- if (bytes_remaining)
- {
+ if (bytes_remaining) {
uint8_t last_word[4] = {0xff, 0xff, 0xff, 0xff};
/* copy the last remaining bytes into the write buffer */
@@ -508,14 +479,13 @@ static int stm32lx_probe(struct flash_bank *bank)
return ERROR_FAIL;
}
- // Read the RDP byte and check if it is 0xAA
+ /* Read the RDP byte and check if it is 0xAA */
uint8_t rdp;
retval = target_read_u32(target, FLASH_OBR, &reg32);
if (retval != ERROR_OK)
return retval;
rdp = reg32 & 0xFF;
- if (rdp != 0xAA)
- {
+ if (rdp != 0xAA) {
/*
* Unlocking the option byte is done by unlocking the PECR, then
* by writing the 2 option byte keys to OPTKEYR
@@ -549,19 +519,18 @@ static int stm32lx_probe(struct flash_bank *bank)
if (retval != ERROR_OK)
return retval;
- if (reg32 & FLASH_PECR__OPTLOCK)
- {
+ if (reg32 & FLASH_PECR__OPTLOCK) {
LOG_ERROR("OPTLOCK is not cleared");
return ERROR_FLASH_OPERATION_FAILED;
}
- // Then, write RDP to 0x00 to set level 1
+ /* Then, write RDP to 0x00 to set level 1 */
reg32 = ((~0xAA) << 16) | (0xAA);
retval = target_write_u32(target, OB_RDP, reg32);
if (retval != ERROR_OK)
return retval;
- // Set Automatic update of the option byte, by setting OBL_LAUNCH in FLASH_PECR
+ /* Set Automatic update of the option byte, by setting OBL_LAUNCH in FLASH_PECR */
reg32 = FLASH_PECR__OBL_LAUNCH;
retval = target_write_u32(target, FLASH_PECR, reg32);
if (retval != ERROR_OK)
@@ -574,8 +543,7 @@ static int stm32lx_probe(struct flash_bank *bank)
return retval;
/* check for valid flash size */
- if (flash_size == 0xffff)
- {
+ if (flash_size == 0xffff) {
/* number of sectors incorrect on revA */
LOG_ERROR("STM32 flash size failed, probe inaccurate");
return ERROR_FAIL;
@@ -588,8 +556,7 @@ static int stm32lx_probe(struct flash_bank *bank)
int num_sectors = (flash_size * 1024) / FLASH_SECTOR_SIZE;
LOG_INFO("flash size = %dkbytes", flash_size);
- if (bank->sectors)
- {
+ if (bank->sectors) {
free(bank->sectors);
bank->sectors = NULL;
}
@@ -598,14 +565,12 @@ static int stm32lx_probe(struct flash_bank *bank)
bank->size = flash_size * 1024;
bank->num_sectors = num_sectors;
bank->sectors = malloc(sizeof(struct flash_sector) * num_sectors);
- if (bank->sectors == NULL)
- {
+ if (bank->sectors == NULL) {
LOG_ERROR("failed to allocate bank sectors");
return ERROR_FAIL;
}
- for (i = 0; i < num_sectors; i++)
- {
+ for (i = 0; i < num_sectors; i++) {
bank->sectors[i].offset = i * FLASH_SECTOR_SIZE;
bank->sectors[i].size = FLASH_SECTOR_SIZE;
bank->sectors[i].is_erased = -1;
@@ -622,9 +587,7 @@ static int stm32lx_auto_probe(struct flash_bank *bank)
struct stm32lx_flash_bank *stm32lx_info = bank->driver_priv;
if (stm32lx_info->probed)
- {
return ERROR_OK;
- }
return stm32lx_probe(bank);
}
@@ -637,60 +600,51 @@ static int stm32lx_erase_check(struct flash_bank *bank)
uint32_t nBytes;
int retval = ERROR_OK;
- if (bank->target->state != TARGET_HALTED)
- {
+ if (bank->target->state != TARGET_HALTED) {
LOG_ERROR("Target not halted");
return ERROR_TARGET_NOT_HALTED;
}
uint8_t *buffer = malloc(buffer_size);
- if (buffer == NULL)
- {
+ if (buffer == NULL) {
LOG_ERROR("failed to allocate read buffer");
return ERROR_FAIL;
}
- for (i = 0; i < bank->num_sectors; i++)
- {
+ for (i = 0; i < bank->num_sectors; i++) {
uint32_t j;
bank->sectors[i].is_erased = 1;
- // Loop chunk by chunk over the sector
- for (j = 0; j < bank->sectors[i].size; j += buffer_size)
- {
+ /* Loop chunk by chunk over the sector */
+ for (j = 0; j < bank->sectors[i].size; j += buffer_size) {
uint32_t chunk;
chunk = buffer_size;
if (chunk > (j - bank->sectors[i].size))
- {
chunk = (j - bank->sectors[i].size);
- }
retval = target_read_memory(target, bank->base
+ bank->sectors[i].offset + j, 4, chunk / 4, buffer);
if (retval != ERROR_OK)
break;
- for (nBytes = 0; nBytes < chunk; nBytes++)
- {
- if (buffer[nBytes] != 0x00)
- {
+ for (nBytes = 0; nBytes < chunk; nBytes++) {
+ if (buffer[nBytes] != 0x00) {
bank->sectors[i].is_erased = 0;
break;
}
}
}
if (retval != ERROR_OK)
- {
break;
- }
}
free(buffer);
return retval;
}
+
static int stm32lx_get_info(struct flash_bank *bank, char *buf, int buf_size)
{
- // This method must return a string displaying information about the bank
+ /* This method must return a string displaying information about the bank */
struct target *target = bank->target;
uint32_t device_id;
@@ -706,8 +660,7 @@ static int stm32lx_get_info(struct flash_bank *bank, char *buf, int buf_size)
buf += printed;
buf_size -= printed;
- switch (device_id >> 16)
- {
+ switch (device_id >> 16) {
case 0x1000:
snprintf(buf, buf_size, "A");
break;
@@ -719,9 +672,7 @@ static int stm32lx_get_info(struct flash_bank *bank, char *buf, int buf_size)
snprintf(buf, buf_size, "unknown");
break;
}
- }
- else
- {
+ } else {
snprintf(buf, buf_size, "Cannot identify target as a stm32lx");
return ERROR_FAIL;
}
@@ -729,13 +680,11 @@ static int stm32lx_get_info(struct flash_bank *bank, char *buf, int buf_size)
return ERROR_OK;
}
-static const struct command_registration stm32lx_exec_command_handlers[] =
-{
+static const struct command_registration stm32lx_exec_command_handlers[] = {
COMMAND_REGISTRATION_DONE
};
-static const struct command_registration stm32lx_command_handlers[] =
-{
+static const struct command_registration stm32lx_command_handlers[] = {
{
.name = "stm32lx",
.mode = COMMAND_ANY,
@@ -746,8 +695,7 @@ static const struct command_registration stm32lx_command_handlers[] =
COMMAND_REGISTRATION_DONE
};
-struct flash_driver stm32lx_flash =
-{
+struct flash_driver stm32lx_flash = {
.name = "stm32lx",
.commands = stm32lx_command_handlers,
.flash_bank_command = stm32lx_flash_bank_command,
@@ -762,8 +710,7 @@ struct flash_driver stm32lx_flash =
.info = stm32lx_get_info,
};
-// Static methods implementation
-
+/* Static methods implementation */
static int stm32lx_unlock_program_memory(struct flash_bank *bank)
{
struct target *target = bank->target;
@@ -789,8 +736,7 @@ static int stm32lx_unlock_program_memory(struct flash_bank *bank)
if (retval != ERROR_OK)
return retval;
- if (reg32 & FLASH_PECR__PELOCK)
- {
+ if (reg32 & FLASH_PECR__PELOCK) {
LOG_ERROR("PELOCK is not cleared :(");
return ERROR_FLASH_OPERATION_FAILED;
}
@@ -807,8 +753,7 @@ static int stm32lx_unlock_program_memory(struct flash_bank *bank)
if (retval != ERROR_OK)
return retval;
- if (reg32 & FLASH_PECR__PRGLOCK)
- {
+ if (reg32 & FLASH_PECR__PRGLOCK) {
LOG_ERROR("PRGLOCK is not cleared :(");
return ERROR_FLASH_OPERATION_FAILED;
}
@@ -892,8 +837,7 @@ static int stm32lx_erase_sector(struct flash_bank *bank, int sector)
if (retval != ERROR_OK)
return retval;
- for (int page = 0; page < FLASH_PAGES_PER_SECTOR; page++)
- {
+ for (int page = 0; page < FLASH_PAGES_PER_SECTOR; page++) {
reg32 = FLASH_PECR__PROG | FLASH_PECR__ERASE;
retval = target_write_u32(target, FLASH_PECR, reg32);
if (retval != ERROR_OK)
@@ -929,32 +873,26 @@ static int stm32lx_wait_until_bsy_clear(struct flash_bank *bank)
int timeout = 100;
/* wait for busy to clear */
- for (;;)
- {
+ for (;;) {
retval = target_read_u32(target, FLASH_SR, &status);
if (retval != ERROR_OK)
return retval;
if ((status & FLASH_SR__BSY) == 0)
- {
break;
- }
- if (timeout-- <= 0)
- {
+ if (timeout-- <= 0) {
LOG_ERROR("timed out waiting for flash");
return ERROR_FAIL;
}
alive_sleep(1);
}
- if (status & FLASH_SR__WRPERR)
- {
+ if (status & FLASH_SR__WRPERR) {
LOG_ERROR("access denied / write protected");
retval = ERROR_FAIL;
}
- if (status & FLASH_SR__PGAERR)
- {
+ if (status & FLASH_SR__PGAERR) {
LOG_ERROR("invalid program address");
retval = ERROR_FAIL;
}
generated by cgit v1.1 at 2024-11-16 11:40:43 +0000