* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
***************************************************************************/
+
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <helper/binarybuffer.h>
#include <target/algorithm.h>
#include <target/armv7m.h>
+#include <target/cortex_m.h>
/* stm32lx flash register locations */
/* other registers */
#define DBGMCU_IDCODE 0xE0042000
#define F_SIZE 0x1FF8004C
+#define F_SIZE_MP 0x1FF800CC /* on 0x427 Medium+ and 0x436 HD devices */
/* Constants */
#define FLASH_PAGE_SIZE 256
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 working_area *write_algorithm;
+struct stm32lx_flash_bank {
int probed;
+ bool has_dual_banks;
+ uint32_t user_bank_size;
};
/* flash bank stm32lx <base> <size> 0 0 <target#>
{
struct stm32lx_flash_bank *stm32lx_info;
if (CMD_ARGC < 6)
- {
- LOG_ERROR("incomplete flash_bank stm32lx configuration");
- return ERROR_FLASH_BANK_INVALID;
- }
+ 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;
}
bank->driver_priv = stm32lx_info;
- stm32lx_info->write_algorithm = NULL;
stm32lx_info->probed = 0;
+ stm32lx_info->has_dual_banks = false;
+ stm32lx_info->user_bank_size = bank->size;
+
+ /* the stm32l erased value is 0x00 */
+ bank->default_padded_value = 0x00;
return ERROR_OK;
}
uint32_t wrpr;
- if (target->state != TARGET_HALTED)
- {
- LOG_ERROR("Target not halted");
- return ERROR_TARGET_NOT_HALTED;
- }
-
/*
* Read the WRPR word, and check each bit (corresponding to each
* flash sector
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;
}
* 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;
}
/*
* 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;
return ERROR_OK;
}
-static int stm32lx_write_half_pages(struct flash_bank *bank, uint8_t *buffer,
+static int stm32lx_write_half_pages(struct flash_bank *bank, const uint8_t *buffer,
uint32_t offset, uint32_t count)
{
- struct stm32lx_flash_bank *stm32lx_info = bank->driver_priv;
struct target *target = bank->target;
- uint32_t buffer_size = 4096 * 4;
+ 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];
+ struct reg_param reg_params[3];
struct armv7m_algorithm armv7m_info;
int retval = ERROR_OK;
- uint32_t reg32;
- /* see contib/loaders/flash/stm32lx.s for src */
+ /* 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>
-
- // 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
+ static const uint8_t stm32lx_flash_write_code[] = {
+ /* write_word: */
+ 0x00, 0x23, /* movs r3, #0 */
+ 0x04, 0xe0, /* b test_done */
- // 0000000e <test_done>:
- 0x4293, // e: 4293 cmp r3, r2
- 0xd3f8, // 10: d3f8 bcc.n 4 <write_word>
- 0xbe00, // 12: be00 bkpt 0x0000
+ /* write_word: */
+ 0x51, 0xf8, 0x04, 0xcb, /* ldr ip, [r1], #4 */
+ 0x40, 0xf8, 0x04, 0xcb, /* str ip, [r0], #4 */
+ 0x01, 0x33, /* adds r3, #1 */
- };
+ /* test_done: */
+ 0x93, 0x42, /* cmp r3, r2 */
+ 0xf8, 0xd3, /* bcc write_word */
+ 0x00, 0xbe, /* bkpt 0 */
+ };
- // 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++)
- {
- 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
- reg32 = sizeof(stm32lx_flash_write_code);
- // 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;
+ /* flash write code */
+ if (target_alloc_working_area(target, sizeof(stm32lx_flash_write_code),
+ &write_algorithm) != ERROR_OK) {
+ LOG_DEBUG("no working area for block memory writes");
+ return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+ };
- // Write the flashing code
+ /* Write the flashing code */
retval = target_write_buffer(target,
- stm32lx_info->write_algorithm->address,
+ write_algorithm->address,
sizeof(stm32lx_flash_write_code),
- (uint8_t*) stm32lx_flash_write_code);
- if (retval != ERROR_OK)
- {
- target_free_working_area(target, stm32lx_info->write_algorithm);
+ stm32lx_flash_write_code);
+ if (retval != ERROR_OK) {
+ target_free_working_area(target, write_algorithm);
return retval;
}
- // Allocate half pages memory
- while (target_alloc_working_area_try(target, buffer_size, &source)
- != ERROR_OK)
- {
+ /* Allocate half pages memory */
+ while (target_alloc_working_area_try(target, buffer_size, &source) != ERROR_OK) {
if (buffer_size > 1024)
buffer_size -= 1024;
else
buffer_size /= 2;
- if (buffer_size <= 256)
- {
- /* if we already allocated the writing code, but failed to get a
+ if (buffer_size <= 256) {
+ /* we already allocated the writing code, but failed to get a
* buffer, free the algorithm */
- if (stm32lx_info->write_algorithm)
- target_free_working_area(target, stm32lx_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;
}
}
- LOG_DEBUG("allocated working area for data (%" PRIx32 " bytes)", buffer_size);
armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
- armv7m_info.core_mode = ARMV7M_MODE_ANY;
+ armv7m_info.core_mode = ARM_MODE_THREAD;
init_reg_param(®_params[0], "r0", 32, PARAM_OUT);
init_reg_param(®_params[1], "r1", 32, PARAM_OUT);
init_reg_param(®_params[2], "r2", 32, PARAM_OUT);
- init_reg_param(®_params[3], "r3", 32, PARAM_IN_OUT);
- init_reg_param(®_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);
+ target_free_working_area(target, write_algorithm);
destroy_reg_param(®_params[0]);
destroy_reg_param(®_params[1]);
destroy_reg_param(®_params[2]);
- destroy_reg_param(®_params[3]);
+ return retval;
+ }
+
+ struct armv7m_common *armv7m = target_to_armv7m(target);
+ if (armv7m == NULL) {
+ /* something is very wrong if armv7m is NULL */
+ LOG_ERROR("unable to get armv7m target");
return retval;
}
- // Loop while there are bytes to write
- while (count > 0)
- {
+ /* save any DEMCR flags and configure target to catch any Hard Faults */
+ uint32_t demcr_save = armv7m->demcr;
+ armv7m->demcr = VC_HARDERR;
+
+ /* 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
- retval = target_write_buffer(target, source->address, this_count,
- buffer);
+ /* 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);
+ write_algorithm->address, 0, 10000, &armv7m_info);
if (retval != ERROR_OK)
break;
- // 6: Wait while busy
+ /* check for Hard Fault */
+ if (armv7m->exception_number == 3)
+ break;
+
+ /* 6: Wait while busy */
retval = stm32lx_wait_until_bsy_clear(bank);
if (retval != ERROR_OK)
break;
count -= this_count;
}
+ /* restore previous flags */
+ armv7m->demcr = demcr_save;
+
+ if (armv7m->exception_number == 3) {
+
+ /* the stm32l15x devices seem to have an issue when blank.
+ * if a ram loader is executed on a blank device it will
+ * Hard Fault, this issue does not happen for a already programmed device.
+ * A related issue is described in the stm32l151xx errata (Doc ID 17721 Rev 6 - 2.1.3).
+ * The workaround of handling the Hard Fault exception does work, but makes the
+ * loader more complicated, as a compromise we manually write the pages, programming time
+ * is reduced by 50% using this slower method.
+ */
+
+ LOG_WARNING("couldn't use loader, falling back to page memory writes");
+
+ while (count > 0) {
+ uint32_t this_count;
+ this_count = (count > 128) ? 128 : count;
+
+ /* Write the next half pages */
+ retval = target_write_buffer(target, address, this_count, buffer);
+ if (retval != ERROR_OK)
+ break;
+
+ /* Wait while busy */
+ retval = stm32lx_wait_until_bsy_clear(bank);
+ if (retval != ERROR_OK)
+ break;
+
+ buffer += this_count;
+ address += this_count;
+ count -= this_count;
+ }
+ }
+
if (retval == ERROR_OK)
retval = stm32lx_lock_program_memory(bank);
target_free_working_area(target, source);
- target_free_working_area(target, stm32lx_info->write_algorithm);
+ target_free_working_area(target, write_algorithm);
destroy_reg_param(®_params[0]);
destroy_reg_param(®_params[1]);
destroy_reg_param(®_params[2]);
- destroy_reg_param(®_params[3]);
return retval;
}
-static int stm32lx_write(struct flash_bank *bank, uint8_t *buffer,
+
+static int stm32lx_write(struct flash_bank *bank, const uint8_t *buffer,
uint32_t offset, uint32_t count)
{
struct target *target = bank->target;
uint32_t halfpages_number;
- uint32_t words_remaining;
- uint32_t bytes_remaining;
+ uint32_t bytes_remaining = 0;
uint32_t address = bank->base + offset;
uint32_t bytes_written = 0;
- int retval;
+ int retval, retval2;
- 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)
- {
- LOG_ERROR("offset 0x%" PRIx32 " breaks required 2-byte alignment", offset);
+ if (offset & 0x3) {
+ LOG_ERROR("offset 0x%" PRIx32 " breaks required 4-byte alignment", offset);
return ERROR_FLASH_DST_BREAKS_ALIGNMENT;
}
- // 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
- {
- halfpages_number = 0;
- words_remaining = (count / 4);
- bytes_remaining = (count & 0x3);
- }
-
- if (halfpages_number)
- {
- retval = stm32lx_write_half_pages(bank, buffer, offset, 128
- * halfpages_number);
- if (retval != ERROR_OK)
- return ERROR_FAIL;
- }
-
- bytes_written = 128 * halfpages_number;
-
retval = stm32lx_unlock_program_memory(bank);
if (retval != ERROR_OK)
return retval;
- while (words_remaining > 0)
- {
- uint32_t value;
- uint8_t* p = buffer + bytes_written;
+ /* first we need to write any unaligned head bytes upto
+ * the next 128 byte page */
- // Prepare the word, Little endian conversion
- value = p[0] + (p[1] << 8) + (p[2] << 16) + (p[3] << 24);
+ if (offset % 128)
+ bytes_remaining = MIN(count, 128 - (offset % 128));
- retval = target_write_u32(target, address, value);
+ while (bytes_remaining > 0) {
+ uint8_t value[4] = {0xff, 0xff, 0xff, 0xff};
+
+ /* copy remaining bytes into the write buffer */
+ uint32_t bytes_to_write = MIN(4, bytes_remaining);
+ memcpy(value, buffer + bytes_written, bytes_to_write);
+
+ retval = target_write_buffer(target, address, 4, value);
if (retval != ERROR_OK)
- return retval;
+ goto reset_pg_and_lock;
- bytes_written += 4;
- words_remaining--;
+ bytes_written += bytes_to_write;
+ bytes_remaining -= bytes_to_write;
address += 4;
retval = stm32lx_wait_until_bsy_clear(bank);
if (retval != ERROR_OK)
- return retval;
+ goto reset_pg_and_lock;
}
- if (bytes_remaining)
- {
- uint32_t value = 0;
- for (int i = 0; i < 4; i++)
- {
- if (bytes_remaining)
- {
- value += (buffer[i] << (8 * i));
- bytes_remaining--;
- }
+ offset += bytes_written;
+ count -= bytes_written;
+
+ /* this should always pass this check here */
+ assert((offset % 128) == 0);
+
+ /* calculate half pages */
+ halfpages_number = count / 128;
+
+ if (halfpages_number) {
+ retval = stm32lx_write_half_pages(bank, buffer + bytes_written, offset, 128 * halfpages_number);
+ if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE) {
+ /* attempt slow memory writes */
+ LOG_WARNING("couldn't use block writes, falling back to single memory accesses");
+ halfpages_number = 0;
+ } else {
+ if (retval != ERROR_OK)
+ return ERROR_FAIL;
}
+ }
+
+ /* write any remaining bytes */
+ uint32_t page_bytes_written = 128 * halfpages_number;
+ bytes_written += page_bytes_written;
+ address += page_bytes_written;
+ bytes_remaining = count - page_bytes_written;
- retval = target_write_u32(target, address, value);
+ retval = stm32lx_unlock_program_memory(bank);
+ if (retval != ERROR_OK)
+ return retval;
+
+ while (bytes_remaining > 0) {
+ uint8_t value[4] = {0xff, 0xff, 0xff, 0xff};
+
+ /* copy remaining bytes into the write buffer */
+ uint32_t bytes_to_write = MIN(4, bytes_remaining);
+ memcpy(value, buffer + bytes_written, bytes_to_write);
+
+ retval = target_write_buffer(target, address, 4, value);
if (retval != ERROR_OK)
- return retval;
+ goto reset_pg_and_lock;
+
+ bytes_written += bytes_to_write;
+ bytes_remaining -= bytes_to_write;
+ address += 4;
retval = stm32lx_wait_until_bsy_clear(bank);
if (retval != ERROR_OK)
- return retval;
+ goto reset_pg_and_lock;
}
- retval = stm32lx_lock_program_memory(bank);
- if (retval != ERROR_OK)
- return retval;
+reset_pg_and_lock:
+ retval2 = stm32lx_lock_program_memory(bank);
+ if (retval == ERROR_OK)
+ retval = retval2;
- return ERROR_OK;
+ return retval;
}
static int stm32lx_probe(struct flash_bank *bank)
struct target *target = bank->target;
struct stm32lx_flash_bank *stm32lx_info = bank->driver_priv;
int i;
- uint16_t flash_size;
+ uint16_t flash_size_in_kb;
+ uint16_t max_flash_size_in_kb;
uint32_t device_id;
- uint32_t reg32;
+ uint32_t base_address = FLASH_BANK0_ADDRESS;
+ uint32_t second_bank_base;
+ uint32_t first_bank_size_in_kb;
stm32lx_info->probed = 0;
LOG_DEBUG("device id = 0x%08" PRIx32 "", device_id);
- if ((device_id & 0x7ff) != 0x416)
- {
+ /* set max flash size depending on family */
+ switch (device_id & 0xfff) {
+ case 0x416:
+ max_flash_size_in_kb = 128;
+ break;
+ case 0x427:
+ /* single bank, high density */
+ max_flash_size_in_kb = 256;
+ break;
+ case 0x436:
+ /* According to ST, the devices with id 0x436 have dual bank flash and comes with
+ * a total flash size of 384k or 256kb. However, the first bank is always 192kb,
+ * and second one holds the rest. The reason is that the 256kb version is actually
+ * the same physical flash but only the first 256kb are verified.
+ */
+ max_flash_size_in_kb = 384;
+ first_bank_size_in_kb = 192;
+ stm32lx_info->has_dual_banks = true;
+ break;
+ case 0x437:
+ /* Dual bank, high density */
+ max_flash_size_in_kb = 512;
+ first_bank_size_in_kb = 192;
+ stm32lx_info->has_dual_banks = true;
+ break;
+ default:
LOG_WARNING("Cannot identify target as a STM32L family.");
return ERROR_FAIL;
}
- // Read the RDP byte and check if it is 0xAA
- uint8_t rdp;
- retval = target_read_u32(target, FLASH_OBR, ®32);
- if (retval != ERROR_OK)
- return retval;
- rdp = reg32 & 0xFF;
- if (rdp != 0xAA)
- {
- /*
- * Unlocking the option byte is done by unlocking the PECR, then
- * by writing the 2 option byte keys to OPTKEYR
- */
-
- /* To unlock the PECR write the 2 PEKEY to the PEKEYR register */
- retval = target_write_u32(target, FLASH_PEKEYR, PEKEY1);
- if (retval != ERROR_OK)
- return retval;
-
- retval = target_write_u32(target, FLASH_PEKEYR, PEKEY2);
- if (retval != ERROR_OK)
- return retval;
-
- /* Make sure it worked */
- retval = target_read_u32(target, FLASH_PECR, ®32);
- if (retval != ERROR_OK)
- return retval;
-
- if (reg32 & FLASH_PECR__PELOCK)
- return ERROR_FLASH_OPERATION_FAILED;
-
- retval = target_write_u32(target, FLASH_OPTKEYR, OPTKEY1);
- if (retval != ERROR_OK)
- return retval;
- retval = target_write_u32(target, FLASH_OPTKEYR, OPTKEY2);
- if (retval != ERROR_OK)
- return retval;
+ /* Get the flash size from target. 0x427 and 0x436 devices use a
+ * different location for the Flash Size register, please see RM0038 r8 or
+ * newer. */
+ if ((device_id & 0xfff) == 0x427 || (device_id & 0xfff) == 0x436 ||
+ (device_id & 0xfff) == 0x437)
+ retval = target_read_u16(target, F_SIZE_MP, &flash_size_in_kb);
+ else
+ retval = target_read_u16(target, F_SIZE, &flash_size_in_kb);
+
+ /* 0x436 devices report their flash size as a 0 or 1 code indicating 384K
+ * or 256K, respectively. Please see RM0038 r8 or newer and refer to
+ * section 30.1.1. */
+ if (retval == ERROR_OK && (device_id & 0xfff) == 0x436) {
+ if (flash_size_in_kb == 0)
+ flash_size_in_kb = 384;
+ else if (flash_size_in_kb == 1)
+ flash_size_in_kb = 256;
+ }
- retval = target_read_u32(target, FLASH_PECR, ®32);
- if (retval != ERROR_OK)
- return retval;
+ /* 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("STM32L flash size failed, probe inaccurate - assuming %dk flash",
+ max_flash_size_in_kb);
+ flash_size_in_kb = max_flash_size_in_kb;
+ } else if (flash_size_in_kb > max_flash_size_in_kb) {
+ LOG_WARNING("STM32L probed flash size assumed incorrect since FLASH_SIZE=%dk > %dk, - assuming %dk flash",
+ flash_size_in_kb, max_flash_size_in_kb, max_flash_size_in_kb);
+ flash_size_in_kb = max_flash_size_in_kb;
+ }
- if (reg32 & FLASH_PECR__OPTLOCK)
- {
- LOG_ERROR("OPTLOCK is not cleared");
- return ERROR_FLASH_OPERATION_FAILED;
+ if (stm32lx_info->has_dual_banks) {
+ /* Use the configured base address to determine if this is the first or second flash bank.
+ * Verify that the base address is reasonably correct and determine the flash bank size
+ */
+ second_bank_base = base_address + first_bank_size_in_kb * 1024;
+ if (bank->base == second_bank_base) {
+ /* This is the second bank */
+ base_address = second_bank_base;
+ flash_size_in_kb = flash_size_in_kb - first_bank_size_in_kb;
+ } else if (bank->base == 0 || bank->base == base_address) {
+ /* This is the first bank */
+ flash_size_in_kb = first_bank_size_in_kb;
+ } else {
+ LOG_WARNING("STM32L flash bank base address config is incorrect."
+ " 0x%" PRIx32 " but should rather be 0x%" PRIx32 " or 0x%" PRIx32,
+ bank->base, base_address, second_bank_base);
+ return ERROR_FAIL;
}
-
- // 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
- reg32 = FLASH_PECR__OBL_LAUNCH;
- retval = target_write_u32(target, FLASH_PECR, reg32);
- if (retval != ERROR_OK)
- return retval;
+ LOG_INFO("STM32L flash has dual banks. Bank (%d) size is %dkb, base address is 0x%" PRIx32,
+ bank->bank_number, flash_size_in_kb, base_address);
+ } else {
+ LOG_INFO("STM32L flash size is %dkb, base address is 0x%" PRIx32, flash_size_in_kb, base_address);
}
- /* get flash size from target. */
- retval = target_read_u16(target, F_SIZE, &flash_size);
- if (retval != ERROR_OK)
- return retval;
-
- /* check for valid flash size */
- if (flash_size == 0xffff)
- {
- /* number of sectors incorrect on revA */
- LOG_ERROR("STM32 flash size failed, probe inaccurate");
- return ERROR_FAIL;
+ /* if the user sets the size manually then ignore the probed value
+ * this allows us to work around devices that have a invalid flash size register value */
+ if (stm32lx_info->user_bank_size) {
+ flash_size_in_kb = stm32lx_info->user_bank_size / 1024;
+ LOG_INFO("ignoring flash probed value, using configured bank size: %dkbytes", flash_size_in_kb);
}
/* STM32L - we have 32 sectors, 16 pages per sector -> 512 pages
* 16 pages for a protection area */
/* calculate numbers of sectors (4kB per sector) */
- int num_sectors = (flash_size * 1024) / FLASH_SECTOR_SIZE;
- LOG_INFO("flash size = %dkbytes", flash_size);
+ int num_sectors = (flash_size_in_kb * 1024) / FLASH_SECTOR_SIZE;
- if (bank->sectors)
- {
+ if (bank->sectors) {
free(bank->sectors);
bank->sectors = NULL;
}
- bank->base = FLASH_BANK0_ADDRESS;
- bank->size = flash_size * 1024;
+ bank->size = flash_size_in_kb * 1024;
+ bank->base = base_address;
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;
struct stm32lx_flash_bank *stm32lx_info = bank->driver_priv;
if (stm32lx_info->probed)
- {
return ERROR_OK;
- }
return stm32lx_probe(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;
- int printed;
+ uint32_t dbgmcu_idcode;
/* read stm32 device id register */
- int retval = target_read_u32(target, DBGMCU_IDCODE, &device_id);
+ int retval = target_read_u32(bank->target, DBGMCU_IDCODE, &dbgmcu_idcode);
if (retval != ERROR_OK)
return retval;
- if ((device_id & 0x7ff) == 0x416)
- {
- printed = snprintf(buf, buf_size, "stm32lx - Rev: ");
- buf += printed;
- buf_size -= printed;
-
- switch (device_id >> 16)
- {
- case 0x1000:
- snprintf(buf, buf_size, "A");
- break;
+ uint16_t device_id = dbgmcu_idcode & 0xfff;
+ uint16_t rev_id = dbgmcu_idcode >> 16;
+ const char *device_str;
+ const char *rev_str = NULL;
- case 0x1008:
- snprintf(buf, buf_size, "Y");
- break;
- default:
- snprintf(buf, buf_size, "unknown");
- break;
+ switch (device_id) {
+ case 0x416:
+ device_str = "STM32L1xx (Low/Medium Density)";
+
+ switch (rev_id) {
+ case 0x1000:
+ rev_str = "A";
+ break;
+
+ case 0x1008:
+ rev_str = "Y";
+ break;
+
+ case 0x1018:
+ rev_str = "X";
+ break;
+
+ case 0x1038:
+ rev_str = "W";
+ break;
+
+ case 0x1078:
+ rev_str = "V";
+ break;
}
- }
- else
- {
- snprintf(buf, buf_size, "Cannot identify target as a stm32lx");
+ break;
+
+ case 0x427:
+ device_str = "STM32L1xx (Medium+ Density)";
+
+ switch (rev_id) {
+ case 0x1018:
+ rev_str = "A";
+ break;
+ }
+ break;
+
+ case 0x436:
+ device_str = "STM32L1xx (Medium+/High Density)";
+
+ switch (rev_id) {
+ case 0x1000:
+ rev_str = "A";
+ break;
+
+ case 0x1008:
+ rev_str = "Z";
+ break;
+
+ case 0x1018:
+ rev_str = "Y";
+ break;
+ }
+ break;
+
+ case 0x437:
+ device_str = "STM32L1xx (Medium+/High Density)";
+ break;
+
+ default:
+ snprintf(buf, buf_size, "Cannot identify target as a STM32L1");
return ERROR_FAIL;
}
+ if (rev_str != NULL)
+ snprintf(buf, buf_size, "%s - Rev: %s", device_str, rev_str);
+ else
+ snprintf(buf, buf_size, "%s - Rev: unknown (0x%04x)", device_str, rev_id);
+
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,
.help = "stm32lx flash command group",
+ .usage = "",
.chain = stm32lx_exec_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,
.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;
* then by writing the 2 PRGKEY to the PRGKEYR register
*/
+ /* check flash is not already unlocked */
+ retval = target_read_u32(target, FLASH_PECR, ®32);
+ if (retval != ERROR_OK)
+ return retval;
+
+ if ((reg32 & FLASH_PECR__PRGLOCK) == 0)
+ return ERROR_OK;
+
/* To unlock the PECR write the 2 PEKEY to the PEKEYR register */
retval = target_write_u32(target, FLASH_PEKEYR, PEKEY1);
if (retval != ERROR_OK)
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;
}
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;
}
+
return ERROR_OK;
}
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)
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;
}
projects / fw / openocd / blobdiff