* 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 <helper/binarybuffer.h>
#include <target/algorithm.h>
#include <target/armv7m.h>
+#include <target/cortex_m.h>
/* stm32lx flash register locations */
-#define FLASH_BASE 0x40023C00
-#define FLASH_ACR 0x40023C00
-#define FLASH_PECR 0x40023C04
-#define FLASH_PDKEYR 0x40023C08
-#define FLASH_PEKEYR 0x40023C0C
-#define FLASH_PRGKEYR 0x40023C10
-#define FLASH_OPTKEYR 0x40023C14
-#define FLASH_SR 0x40023C18
-#define FLASH_OBR 0x40023C1C
-#define FLASH_WRPR 0x40023C20
+#define FLASH_ACR 0x00
+#define FLASH_PECR 0x04
+#define FLASH_PDKEYR 0x08
+#define FLASH_PEKEYR 0x0C
+#define FLASH_PRGKEYR 0x10
+#define FLASH_OPTKEYR 0x14
+#define FLASH_SR 0x18
+#define FLASH_OBR 0x1C
+#define FLASH_WRPR 0x20
/* FLASH_ACR bites */
#define FLASH_ACR__LATENCY (1<<0)
#define OPTKEY2 0x24252627
/* other registers */
-#define DBGMCU_IDCODE 0xE0042000
-#define F_SIZE 0x1FF8004C
+#define DBGMCU_IDCODE 0xE0042000
+#define DBGMCU_IDCODE_L0 0x40015800
/* Constants */
-#define FLASH_PAGE_SIZE 256
#define FLASH_SECTOR_SIZE 4096
-#define FLASH_PAGES_PER_SECTOR 16
#define FLASH_BANK0_ADDRESS 0x08000000
-/* stm32lx option byte register location */
-#define OB_RDP 0x1FF80000
-#define OB_USER 0x1FF80004
-#define OB_WRP0_1 0x1FF80008
-#define OB_WRP2_3 0x1FF8000C
+/* option bytes */
+#define OPTION_BYTES_ADDRESS 0x1FF80000
-/* OB_RDP values */
-#define OB_RDP__LEVEL0 0xFF5500AA
-#define OB_RDP__LEVEL1 0xFFFF0000
-
-/* stm32lx RCC register locations */
-#define RCC_CR 0x40023800
-#define RCC_ICSCR 0x40023804
-#define RCC_CFGR 0x40023808
-
-/* RCC_ICSCR bits */
-#define RCC_ICSCR__MSIRANGE_MASK (7<<13)
+#define OPTION_BYTE_0_PR1 0xFFFF0000
+#define OPTION_BYTE_0_PR0 0xFF5500AA
static int stm32lx_unlock_program_memory(struct flash_bank *bank);
static int stm32lx_lock_program_memory(struct flash_bank *bank);
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);
+static int stm32lx_mass_erase(struct flash_bank *bank);
+static int stm32lx_wait_until_bsy_clear_timeout(struct flash_bank *bank, int timeout);
+
+struct stm32lx_rev {
+ uint16_t rev;
+ const char *str;
+};
+
+struct stm32lx_part_info {
+ uint16_t id;
+ const char *device_str;
+ const struct stm32lx_rev *revs;
+ size_t num_revs;
+ unsigned int page_size;
+ unsigned int pages_per_sector;
+ uint16_t max_flash_size_kb;
+ uint16_t first_bank_size_kb; /* used when has_dual_banks is true */
+ bool has_dual_banks;
+
+ uint32_t flash_base; /* Flash controller registers location */
+ uint32_t fsize_base; /* Location of FSIZE register */
+};
struct stm32lx_flash_bank {
- struct working_area *write_algorithm;
int probed;
+ uint32_t idcode;
+ uint32_t user_bank_size;
+ uint32_t flash_base;
+
+ const struct stm32lx_part_info *part_info;
+};
+
+static const struct stm32lx_rev stm32_416_revs[] = {
+ { 0x1000, "A" }, { 0x1008, "Y" }, { 0x1018, "X" }, { 0x1038, "W" },
+ { 0x1078, "V" },
+};
+static const struct stm32lx_rev stm32_417_revs[] = {
+ { 0x1000, "A" }, { 0x1008, "Z" },
+};
+static const struct stm32lx_rev stm32_427_revs[] = {
+ { 0x1018, "A" },
+};
+static const struct stm32lx_rev stm32_436_revs[] = {
+ { 0x1000, "A" }, { 0x1008, "Z" }, { 0x1018, "Y" },
+};
+
+static const struct stm32lx_part_info stm32lx_parts[] = {
+ {
+ .id = 0x416,
+ .revs = stm32_416_revs,
+ .num_revs = ARRAY_SIZE(stm32_416_revs),
+ .device_str = "STM32L1xx (Low/Medium Density)",
+ .page_size = 256,
+ .pages_per_sector = 16,
+ .max_flash_size_kb = 128,
+ .has_dual_banks = false,
+ .flash_base = 0x40023C00,
+ .fsize_base = 0x1FF8004C,
+ },
+ {
+ .id = 0x417,
+ .revs = stm32_417_revs,
+ .num_revs = ARRAY_SIZE(stm32_417_revs),
+ .device_str = "STM32L0xx",
+ .page_size = 128,
+ .pages_per_sector = 32,
+ .max_flash_size_kb = 64,
+ .has_dual_banks = false,
+ .flash_base = 0x40022000,
+ .fsize_base = 0x1FF8007C,
+ },
+ {
+ .id = 0x427,
+ .revs = stm32_427_revs,
+ .num_revs = ARRAY_SIZE(stm32_427_revs),
+ .device_str = "STM32L1xx (Medium+ Density)",
+ .page_size = 256,
+ .pages_per_sector = 16,
+ .max_flash_size_kb = 256,
+ .first_bank_size_kb = 192,
+ .has_dual_banks = true,
+ .flash_base = 0x40023C00,
+ .fsize_base = 0x1FF800CC,
+ },
+ {
+ .id = 0x436,
+ .revs = stm32_436_revs,
+ .num_revs = ARRAY_SIZE(stm32_436_revs),
+ .device_str = "STM32L1xx (Medium+/High Density)",
+ .page_size = 256,
+ .pages_per_sector = 16,
+ .max_flash_size_kb = 384,
+ .first_bank_size_kb = 192,
+ .has_dual_banks = true,
+ .flash_base = 0x40023C00,
+ .fsize_base = 0x1FF800CC,
+ },
+ {
+ .id = 0x437,
+ .device_str = "STM32L1xx (Medium+/High Density)",
+ .page_size = 256,
+ .pages_per_sector = 16,
+ .max_flash_size_kb = 512,
+ .first_bank_size_kb = 256,
+ .has_dual_banks = true,
+ .flash_base = 0x40023C00,
+ .fsize_base = 0x1FF800CC,
+ },
};
/* flash bank stm32lx <base> <size> 0 0 <target#>
return ERROR_COMMAND_SYNTAX_ERROR;
/* Create the bank structure */
- stm32lx_info = malloc(sizeof(struct stm32lx_flash_bank));
+ stm32lx_info = calloc(1, sizeof(*stm32lx_info));
/* Check allocation */
if (stm32lx_info == NULL) {
bank->driver_priv = stm32lx_info;
- stm32lx_info->write_algorithm = NULL;
stm32lx_info->probed = 0;
+ stm32lx_info->user_bank_size = bank->size;
+
+ /* the stm32l erased value is 0x00 */
+ bank->default_padded_value = 0x00;
return ERROR_OK;
}
+COMMAND_HANDLER(stm32lx_handle_mass_erase_command)
+{
+ int i;
+
+ if (CMD_ARGC < 1)
+ return ERROR_COMMAND_SYNTAX_ERROR;
+
+ struct flash_bank *bank;
+ int retval = CALL_COMMAND_HANDLER(flash_command_get_bank, 0, &bank);
+ if (ERROR_OK != retval)
+ return retval;
+
+ retval = stm32lx_mass_erase(bank);
+ if (retval == ERROR_OK) {
+ /* set all sectors as erased */
+ for (i = 0; i < bank->num_sectors; i++)
+ bank->sectors[i].is_erased = 1;
+
+ command_print(CMD_CTX, "stm32lx mass erase complete");
+ } else {
+ command_print(CMD_CTX, "stm32lx mass erase failed");
+ }
+
+ return retval;
+}
+
static int stm32lx_protect_check(struct flash_bank *bank)
{
int retval;
struct target *target = bank->target;
+ struct stm32lx_flash_bank *stm32lx_info = bank->driver_priv;
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
*/
- retval = target_read_u32(target, FLASH_WRPR, &wrpr);
+ retval = target_read_u32(target, stm32lx_info->flash_base + FLASH_WRPR,
+ &wrpr);
if (retval != ERROR_OK)
return retval;
- for (int i = 0; i < 32; i++) {
+ for (int i = 0; i < bank->num_sectors; i++) {
if (wrpr & (1 << i))
bank->sectors[i].is_protected = 1;
else
return ERROR_TARGET_NOT_HALTED;
}
+ if ((first == 0) && (last == (bank->num_sectors - 1)))
+ return stm32lx_mass_erase(bank);
+
/*
* Loop over the selected sectors and erase them
*/
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;
+ struct stm32lx_flash_bank *stm32lx_info = bank->driver_priv;
+
+ uint32_t hp_nb = stm32lx_info->part_info->page_size / 2;
+ 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 */
-
- 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 */
-
- /* 0000000e <test_done>: */
- 0x4293, /* e: 4293 cmp r3, r2 */
- 0xd3f8, /* 10: d3f8 bcc.n 4 <write_word> */
- 0xbe00, /* 12: be00 bkpt 0x0000 */
-
- };
-
- /* 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) {
- LOG_ERROR("there should be an even number "
- "of half pages = 128 bytes (count = %" PRIi32 " bytes)", count);
+ /* see contib/loaders/flash/stm32lx.S for src */
+
+ static const uint8_t stm32lx_flash_write_code[] = {
+ /* write_word: */
+ 0x00, 0x23, /* movs r3, #0 */
+ 0x04, 0xe0, /* b test_done */
+
+ /* 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 */
+ };
+
+ /* Make sure we're performing a half-page aligned write. */
+ if (count % hp_nb) {
+ LOG_ERROR("The byte count must be %" PRIu32 "B-aligned but count is %" PRIi32 "B)", hp_nb, 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 */
retval = target_write_buffer(target,
- stm32lx_info->write_algorithm->address,
+ write_algorithm->address,
sizeof(stm32lx_flash_write_code),
- (uint8_t *)stm32lx_flash_write_code);
+ stm32lx_flash_write_code);
if (retval != ERROR_OK) {
- target_free_working_area(target, stm32lx_info->write_algorithm);
+ 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) {
+ 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 <= stm32lx_info->part_info->page_size) {
+ /* 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 */
retval = stm32lx_enable_write_half_page(bank);
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;
+ }
+
+ /* 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);
+ retval = target_write_buffer(target, source->address, this_count, buffer);
if (retval != ERROR_OK)
break;
/* 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;
+ /* 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)
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 > hp_nb) ? hp_nb : 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;
+ struct stm32lx_flash_bank *stm32lx_info = bank->driver_priv;
+ uint32_t hp_nb = stm32lx_info->part_info->page_size / 2;
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) {
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;
- address += bytes_written;
-
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 */
+
+ if (offset % hp_nb)
+ bytes_remaining = MIN(count, hp_nb - (offset % hp_nb));
- /* Prepare the word, Little endian conversion */
- value = p[0] + (p[1] << 8) + (p[2] << 16) + (p[3] << 24);
+ while (bytes_remaining > 0) {
+ uint8_t value[4] = {0xff, 0xff, 0xff, 0xff};
- retval = target_write_u32(target, address, value);
+ /* 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) {
- uint8_t last_word[4] = {0xff, 0xff, 0xff, 0xff};
+ offset += bytes_written;
+ count -= bytes_written;
+
+ /* this should always pass this check here */
+ assert((offset % hp_nb) == 0);
- /* copy the last remaining bytes into the write buffer */
- memcpy(last_word, buffer+bytes_written, bytes_remaining);
+ /* calculate half pages */
+ halfpages_number = count / hp_nb;
- retval = target_write_buffer(target, address, 4, last_word);
+ if (halfpages_number) {
+ retval = stm32lx_write_half_pages(bank, buffer + bytes_written, offset, hp_nb * 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 = hp_nb * halfpages_number;
+ bytes_written += page_bytes_written;
+ address += page_bytes_written;
+ bytes_remaining = count - page_bytes_written;
+
+ 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);
+reset_pg_and_lock:
+ retval2 = stm32lx_lock_program_memory(bank);
+ if (retval == ERROR_OK)
+ retval = retval2;
+
+ return retval;
+}
+
+static int stm32lx_read_id_code(struct target *target, uint32_t *id)
+{
+ /* read stm32 device id register */
+ int retval = target_read_u32(target, DBGMCU_IDCODE, id);
if (retval != ERROR_OK)
return retval;
- return ERROR_OK;
+ /* STM32L0 parts will have 0 there, try reading the L0's location for
+ * DBG_IDCODE in case this is an L0 part. */
+ if (*id == 0)
+ retval = target_read_u32(target, DBGMCU_IDCODE_L0, id);
+
+ return retval;
}
static int stm32lx_probe(struct flash_bank *bank)
int i;
uint16_t flash_size_in_kb;
uint32_t device_id;
+ uint32_t base_address = FLASH_BANK0_ADDRESS;
+ uint32_t second_bank_base;
stm32lx_info->probed = 0;
+ stm32lx_info->part_info = NULL;
- /* read stm32 device id register */
- int retval = target_read_u32(target, DBGMCU_IDCODE, &device_id);
+ int retval = stm32lx_read_id_code(bank->target, &device_id);
if (retval != ERROR_OK)
return retval;
+ stm32lx_info->idcode = device_id;
+
LOG_DEBUG("device id = 0x%08" PRIx32 "", device_id);
- /* get flash size from target. */
- retval = target_read_u16(target, F_SIZE, &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;
- }
-
- /* 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;
-
- if ((device_id & 0xfff) == 0x416) {
- /* check for early silicon */
- if (flash_size_in_kb == 0xffff) {
- /* number of sectors may be incorrect on early silicon */
- LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming 128k flash");
- flash_size_in_kb = 128;
- }
- } else if ((device_id & 0xfff) == 0x436) {
- /* check for early silicon */
- if (flash_size_in_kb == 0xffff) {
- /* number of sectors may be incorrect on early silicon */
- LOG_WARNING("STM32 flash size failed, probe inaccurate - assuming 384k flash");
+ for (unsigned int n = 0; n < ARRAY_SIZE(stm32lx_parts); n++) {
+ if ((device_id & 0xfff) == stm32lx_parts[n].id)
+ stm32lx_info->part_info = &stm32lx_parts[n];
+ }
+
+ if (!stm32lx_info->part_info) {
+ LOG_WARNING("Cannot identify target as a STM32L family.");
+ return ERROR_FAIL;
+ }
+
+ stm32lx_info->flash_base = stm32lx_info->part_info->flash_base;
+
+ /* Get the flash size from target. */
+ retval = target_read_u16(target, stm32lx_info->part_info->fsize_base,
+ &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;
+ }
+
+ /* 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",
+ stm32lx_info->part_info->max_flash_size_kb);
+ flash_size_in_kb = stm32lx_info->part_info->max_flash_size_kb;
+ } else if (flash_size_in_kb > stm32lx_info->part_info->max_flash_size_kb) {
+ LOG_WARNING("STM32L probed flash size assumed incorrect since FLASH_SIZE=%dk > %dk, - assuming %dk flash",
+ flash_size_in_kb, stm32lx_info->part_info->max_flash_size_kb,
+ stm32lx_info->part_info->max_flash_size_kb);
+ flash_size_in_kb = stm32lx_info->part_info->max_flash_size_kb;
+ }
+
+ if (stm32lx_info->part_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 +
+ stm32lx_info->part_info->first_bank_size_kb * 1024;
+ if (bank->base == second_bank_base || !bank->base) {
+ /* This is the second bank */
+ base_address = second_bank_base;
+ flash_size_in_kb = flash_size_in_kb -
+ stm32lx_info->part_info->first_bank_size_kb;
+ } else if (bank->base == base_address) {
+ /* This is the first bank */
+ flash_size_in_kb = stm32lx_info->part_info->first_bank_size_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;
}
+ 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_WARNING("Cannot identify target as a STM32L family.");
- return ERROR_FAIL;
+ LOG_INFO("STM32L flash size is %dkb, base address is 0x%" PRIx32, flash_size_in_kb, base_address);
}
- /* STM32L - we have 32 sectors, 16 pages per sector -> 512 pages
- * 16 pages for a protection area */
+ /* 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);
+ }
/* calculate numbers of sectors (4kB per sector) */
int num_sectors = (flash_size_in_kb * 1024) / FLASH_SECTOR_SIZE;
- LOG_INFO("flash size = %dkbytes", flash_size_in_kb);
if (bank->sectors) {
free(bank->sectors);
bank->sectors = NULL;
}
- bank->base = FLASH_BANK0_ADDRESS;
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) {
return retval;
}
+/* This method must return a string displaying information about the bank */
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 */
-
- struct target *target = bank->target;
- uint32_t device_id;
- int printed;
-
- /* read stm32 device id register */
- int retval = target_read_u32(target, DBGMCU_IDCODE, &device_id);
- if (retval != ERROR_OK)
- return retval;
-
- if ((device_id & 0xfff) == 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;
+ struct stm32lx_flash_bank *stm32lx_info = bank->driver_priv;
- case 0x1008:
- snprintf(buf, buf_size, "Y");
- break;
+ if (!stm32lx_info->probed) {
+ int retval = stm32lx_probe(bank);
+ if (retval != ERROR_OK) {
+ snprintf(buf, buf_size,
+ "Unable to find bank information.");
+ return retval;
+ }
+ }
- case 0x1018:
- snprintf(buf, buf_size, "X");
- break;
+ const struct stm32lx_part_info *info = stm32lx_info->part_info;
- case 0x1038:
- snprintf(buf, buf_size, "W");
- break;
+ if (info) {
+ const char *rev_str = NULL;
+ uint16_t rev_id = stm32lx_info->idcode >> 16;
- case 0x1078:
- snprintf(buf, buf_size, "V");
- break;
+ for (unsigned int i = 0; i < info->num_revs; i++)
+ if (rev_id == info->revs[i].rev)
+ rev_str = info->revs[i].str;
- default:
- snprintf(buf, buf_size, "unknown");
- break;
+ if (rev_str != NULL) {
+ snprintf(buf, buf_size,
+ "%s - Rev: %s",
+ stm32lx_info->part_info->device_str, rev_str);
+ } else {
+ snprintf(buf, buf_size,
+ "%s - Rev: unknown (0x%04x)",
+ stm32lx_info->part_info->device_str, rev_id);
}
- } else if ((device_id & 0xfff) == 0x436) {
- printed = snprintf(buf, buf_size, "stm32lx (HD) - Rev: ");
- buf += printed;
- buf_size -= printed;
-
- switch (device_id >> 16) {
- case 0x1000:
- snprintf(buf, buf_size, "A");
- break;
-
- case 0x1008:
- snprintf(buf, buf_size, "Z");
- break;
- default:
- snprintf(buf, buf_size, "unknown");
- break;
- }
+ return ERROR_OK;
} else {
- snprintf(buf, buf_size, "Cannot identify target as a stm32lx");
+ snprintf(buf, buf_size, "Cannot identify target as a STM32Lx");
+
return ERROR_FAIL;
}
-
- return ERROR_OK;
}
static const struct command_registration stm32lx_exec_command_handlers[] = {
+ {
+ .name = "mass_erase",
+ .handler = stm32lx_handle_mass_erase_command,
+ .mode = COMMAND_EXEC,
+ .usage = "bank_id",
+ .help = "Erase entire flash device. including available EEPROM",
+ },
COMMAND_REGISTRATION_DONE
};
static int stm32lx_unlock_program_memory(struct flash_bank *bank)
{
struct target *target = bank->target;
+ struct stm32lx_flash_bank *stm32lx_info = bank->driver_priv;
int retval;
uint32_t reg32;
* then by writing the 2 PRGKEY to the PRGKEYR register
*/
+ /* check flash is not already unlocked */
+ retval = target_read_u32(target, stm32lx_info->flash_base + 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);
+ retval = target_write_u32(target, stm32lx_info->flash_base + FLASH_PEKEYR,
+ PEKEY1);
if (retval != ERROR_OK)
return retval;
- retval = target_write_u32(target, FLASH_PEKEYR, PEKEY2);
+ retval = target_write_u32(target, stm32lx_info->flash_base + FLASH_PEKEYR,
+ PEKEY2);
if (retval != ERROR_OK)
return retval;
/* Make sure it worked */
- retval = target_read_u32(target, FLASH_PECR, ®32);
+ retval = target_read_u32(target, stm32lx_info->flash_base + FLASH_PECR,
+ ®32);
if (retval != ERROR_OK)
return retval;
return ERROR_FLASH_OPERATION_FAILED;
}
- retval = target_write_u32(target, FLASH_PRGKEYR, PRGKEY1);
+ retval = target_write_u32(target, stm32lx_info->flash_base + FLASH_PRGKEYR,
+ PRGKEY1);
if (retval != ERROR_OK)
return retval;
- retval = target_write_u32(target, FLASH_PRGKEYR, PRGKEY2);
+ retval = target_write_u32(target, stm32lx_info->flash_base + FLASH_PRGKEYR,
+ PRGKEY2);
if (retval != ERROR_OK)
return retval;
/* Make sure it worked */
- retval = target_read_u32(target, FLASH_PECR, ®32);
+ retval = target_read_u32(target, stm32lx_info->flash_base + FLASH_PECR,
+ ®32);
if (retval != ERROR_OK)
return retval;
LOG_ERROR("PRGLOCK is not cleared :(");
return ERROR_FLASH_OPERATION_FAILED;
}
+
return ERROR_OK;
}
static int stm32lx_enable_write_half_page(struct flash_bank *bank)
{
struct target *target = bank->target;
+ struct stm32lx_flash_bank *stm32lx_info = bank->driver_priv;
int retval;
uint32_t reg32;
if (retval != ERROR_OK)
return retval;
- retval = target_read_u32(target, FLASH_PECR, ®32);
+ retval = target_read_u32(target, stm32lx_info->flash_base + FLASH_PECR,
+ ®32);
if (retval != ERROR_OK)
return retval;
reg32 |= FLASH_PECR__FPRG;
- retval = target_write_u32(target, FLASH_PECR, reg32);
+ retval = target_write_u32(target, stm32lx_info->flash_base + FLASH_PECR,
+ reg32);
if (retval != ERROR_OK)
return retval;
- retval = target_read_u32(target, FLASH_PECR, ®32);
+ retval = target_read_u32(target, stm32lx_info->flash_base + FLASH_PECR,
+ ®32);
if (retval != ERROR_OK)
return retval;
reg32 |= FLASH_PECR__PROG;
- retval = target_write_u32(target, FLASH_PECR, reg32);
+ retval = target_write_u32(target, stm32lx_info->flash_base + FLASH_PECR,
+ reg32);
return retval;
}
static int stm32lx_lock_program_memory(struct flash_bank *bank)
{
struct target *target = bank->target;
+ struct stm32lx_flash_bank *stm32lx_info = bank->driver_priv;
int retval;
uint32_t reg32;
/* To lock the program memory, simply set the lock bit and lock PECR */
- retval = target_read_u32(target, FLASH_PECR, ®32);
+ retval = target_read_u32(target, stm32lx_info->flash_base + FLASH_PECR,
+ ®32);
if (retval != ERROR_OK)
return retval;
reg32 |= FLASH_PECR__PRGLOCK;
- retval = target_write_u32(target, FLASH_PECR, reg32);
+ retval = target_write_u32(target, stm32lx_info->flash_base + FLASH_PECR,
+ reg32);
if (retval != ERROR_OK)
return retval;
- retval = target_read_u32(target, FLASH_PECR, ®32);
+ retval = target_read_u32(target, stm32lx_info->flash_base + FLASH_PECR,
+ ®32);
if (retval != ERROR_OK)
return retval;
reg32 |= FLASH_PECR__PELOCK;
- retval = target_write_u32(target, FLASH_PECR, reg32);
+ retval = target_write_u32(target, stm32lx_info->flash_base + FLASH_PECR,
+ reg32);
if (retval != ERROR_OK)
return retval;
static int stm32lx_erase_sector(struct flash_bank *bank, int sector)
{
struct target *target = bank->target;
+ struct stm32lx_flash_bank *stm32lx_info = bank->driver_priv;
int retval;
uint32_t reg32;
/*
- * To erase a sector (i.e. FLASH_PAGES_PER_SECTOR pages),
+ * To erase a sector (i.e. stm32lx_info->part_info.pages_per_sector pages),
* first unlock the memory, loop over the pages of this sector
* and write 0x0 to its first word.
*/
if (retval != ERROR_OK)
return retval;
- for (int page = 0; page < FLASH_PAGES_PER_SECTOR; page++) {
+ for (int page = 0; page < (int)stm32lx_info->part_info->pages_per_sector;
+ page++) {
reg32 = FLASH_PECR__PROG | FLASH_PECR__ERASE;
- retval = target_write_u32(target, FLASH_PECR, reg32);
+ retval = target_write_u32(target,
+ stm32lx_info->flash_base + FLASH_PECR, reg32);
if (retval != ERROR_OK)
return retval;
return retval;
uint32_t addr = bank->base + bank->sectors[sector].offset + (page
- * FLASH_PAGE_SIZE);
+ * stm32lx_info->part_info->page_size);
retval = target_write_u32(target, addr, 0x0);
if (retval != ERROR_OK)
return retval;
return ERROR_OK;
}
+static inline int stm32lx_get_flash_status(struct flash_bank *bank, uint32_t *status)
+{
+ struct target *target = bank->target;
+ struct stm32lx_flash_bank *stm32lx_info = bank->driver_priv;
+
+ return target_read_u32(target, stm32lx_info->flash_base + FLASH_SR, status);
+}
+
static int stm32lx_wait_until_bsy_clear(struct flash_bank *bank)
+{
+ return stm32lx_wait_until_bsy_clear_timeout(bank, 100);
+}
+
+static int stm32lx_unlock_options_bytes(struct flash_bank *bank)
+{
+ struct target *target = bank->target;
+ struct stm32lx_flash_bank *stm32lx_info = bank->driver_priv;
+ int retval;
+ uint32_t reg32;
+
+ /*
+ * Unlocking the options bytes is done by unlocking the PECR,
+ * then by writing the 2 FLASH_PEKEYR to the FLASH_OPTKEYR register
+ */
+
+ /* check flash is not already unlocked */
+ retval = target_read_u32(target, stm32lx_info->flash_base + FLASH_PECR, ®32);
+ if (retval != ERROR_OK)
+ return retval;
+
+ if ((reg32 & FLASH_PECR__OPTLOCK) == 0)
+ return ERROR_OK;
+
+ if ((reg32 & FLASH_PECR__PELOCK) != 0) {
+
+ retval = target_write_u32(target, stm32lx_info->flash_base + FLASH_PEKEYR, PEKEY1);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = target_write_u32(target, stm32lx_info->flash_base + FLASH_PEKEYR, PEKEY2);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+
+ /* To unlock the PECR write the 2 OPTKEY to the FLASH_OPTKEYR register */
+ retval = target_write_u32(target, stm32lx_info->flash_base + FLASH_OPTKEYR, OPTKEY1);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = target_write_u32(target, stm32lx_info->flash_base + FLASH_OPTKEYR, OPTKEY2);
+ if (retval != ERROR_OK)
+ return retval;
+
+ return ERROR_OK;
+}
+
+static int stm32lx_wait_until_bsy_clear_timeout(struct flash_bank *bank, int timeout)
{
struct target *target = bank->target;
+ struct stm32lx_flash_bank *stm32lx_info = bank->driver_priv;
uint32_t status;
int retval = ERROR_OK;
- int timeout = 100;
/* wait for busy to clear */
for (;;) {
- retval = target_read_u32(target, FLASH_SR, &status);
+ retval = stm32lx_get_flash_status(bank, &status);
if (retval != ERROR_OK)
return retval;
+ LOG_DEBUG("status: 0x%" PRIx32 "", status);
if ((status & FLASH_SR__BSY) == 0)
break;
+
if (timeout-- <= 0) {
LOG_ERROR("timed out waiting for flash");
return ERROR_FAIL;
retval = ERROR_FAIL;
}
+ /* Clear but report errors */
+ if (status & FLASH_SR__OPTVERR) {
+ /* If this operation fails, we ignore it and report the original retval */
+ target_write_u32(target, stm32lx_info->flash_base + FLASH_SR, status & FLASH_SR__OPTVERR);
+ }
+
return retval;
}
+
+static int stm32lx_obl_launch(struct flash_bank *bank)
+{
+ struct target *target = bank->target;
+ struct stm32lx_flash_bank *stm32lx_info = bank->driver_priv;
+ int retval;
+
+ /* This will fail as the target gets immediately rebooted */
+ target_write_u32(target, stm32lx_info->flash_base + FLASH_PECR,
+ FLASH_PECR__OBL_LAUNCH);
+
+ size_t tries = 10;
+ do {
+ target_halt(target);
+ retval = target_poll(target);
+ } while (--tries > 0 &&
+ (retval != ERROR_OK || target->state != TARGET_HALTED));
+
+ return tries ? ERROR_OK : ERROR_FAIL;
+}
+
+static int stm32lx_mass_erase(struct flash_bank *bank)
+{
+ int retval;
+ struct target *target = bank->target;
+ struct stm32lx_flash_bank *stm32lx_info = NULL;
+ uint32_t reg32;
+
+ if (target->state != TARGET_HALTED) {
+ LOG_ERROR("Target not halted");
+ return ERROR_TARGET_NOT_HALTED;
+ }
+
+ stm32lx_info = bank->driver_priv;
+
+ retval = stm32lx_unlock_options_bytes(bank);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* mass erase flash memory */
+ /* set the RDP protection level to 1 */
+ retval = target_write_u32(target, OPTION_BYTES_ADDRESS, OPTION_BYTE_0_PR1);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = stm32lx_obl_launch(bank);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = stm32lx_unlock_options_bytes(bank);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* set the RDP protection level to 0 */
+ retval = target_write_u32(target, OPTION_BYTES_ADDRESS, OPTION_BYTE_0_PR0);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = stm32lx_wait_until_bsy_clear_timeout(bank, 30000);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = stm32lx_obl_launch(bank);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = target_read_u32(target, stm32lx_info->flash_base + FLASH_PECR, ®32);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = target_write_u32(target, stm32lx_info->flash_base + FLASH_PECR, reg32 | FLASH_PECR__OPTLOCK);
+ if (retval != ERROR_OK)
+ return retval;
+
+ return ERROR_OK;
+}
Code Review / openocd.git / blobdiff