/***************************************************************************
* Copyright (C) 2013 Synapse Product Development *
* Andrey Smirnov <andrew.smironv@gmail.com> *
+ * Angus Gratton <gus@projectgus.com> *
+ * Erdem U. Altunyurt <spamjunkeater@gmail.com> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
#endif
#include "imp.h"
+#include <target/algorithm.h>
+#include <target/armv7m.h>
+#include <helper/types.h>
enum {
NRF51_FLASH_BASE = 0x00000000,
alive_sleep(1);
} while (timeout--);
+ LOG_DEBUG("Timed out waiting for NVMC_READY");
return ERROR_FLASH_BUSY;
}
static int nrf51_erase_all(struct nrf51_info *chip)
{
+ LOG_DEBUG("Erasing all non-volatile memory");
return nrf51_nvmc_generic_erase(chip,
NRF51_NVMC_ERASEALL,
0x00000001);
{
int res;
- if (sector->is_protected)
+ LOG_DEBUG("Erasing page at 0x%"PRIx32, sector->offset);
+ if (sector->is_protected) {
+ LOG_ERROR("Cannot erase protected sector at 0x%x", sector->offset);
return ERROR_FAIL;
+ }
if (bank->base == NRF51_UICR_BASE) {
uint32_t ppfc;
return res;
}
-static int nrf51_ll_flash_write(struct nrf51_info *chip, uint32_t offset, const uint8_t *buffer, uint32_t buffer_size)
-{
- int res;
- assert(buffer_size % 4 == 0);
+static const uint8_t nrf51_flash_write_code[] = {
+ /* See contrib/loaders/flash/cortex-m0.S */
+/* <wait_fifo>: */
+ 0x0d, 0x68, /* ldr r5, [r1, #0] */
+ 0x00, 0x2d, /* cmp r5, #0 */
+ 0x0b, 0xd0, /* beq.n 1e <exit> */
+ 0x4c, 0x68, /* ldr r4, [r1, #4] */
+ 0xac, 0x42, /* cmp r4, r5 */
+ 0xf9, 0xd0, /* beq.n 0 <wait_fifo> */
+ 0x20, 0xcc, /* ldmia r4!, {r5} */
+ 0x20, 0xc3, /* stmia r3!, {r5} */
+ 0x94, 0x42, /* cmp r4, r2 */
+ 0x01, 0xd3, /* bcc.n 18 <no_wrap> */
+ 0x0c, 0x46, /* mov r4, r1 */
+ 0x08, 0x34, /* adds r4, #8 */
+/* <no_wrap>: */
+ 0x4c, 0x60, /* str r4, [r1, #4] */
+ 0x04, 0x38, /* subs r0, #4 */
+ 0xf0, 0xd1, /* bne.n 0 <wait_fifo> */
+/* <exit>: */
+ 0x00, 0xbe /* bkpt 0x0000 */
+};
- for (; buffer_size > 0; buffer_size -= 4) {
- res = target_write_memory(chip->target, offset, 4, 1, buffer);
- if (res != ERROR_OK)
- return res;
- res = nrf51_wait_for_nvmc(chip);
- if (res != ERROR_OK)
- return res;
+/* Start a low level flash write for the specified region */
+static int nrf51_ll_flash_write(struct nrf51_info *chip, uint32_t offset, const uint8_t *buffer, uint32_t bytes)
+{
+ struct target *target = chip->target;
+ uint32_t buffer_size = 8192;
+ struct working_area *write_algorithm;
+ struct working_area *source;
+ uint32_t address = NRF51_FLASH_BASE + offset;
+ struct reg_param reg_params[4];
+ struct armv7m_algorithm armv7m_info;
+ int retval = ERROR_OK;
+
+
+ LOG_DEBUG("Writing buffer to flash offset=0x%"PRIx32" bytes=0x%"PRIx32, offset, bytes);
+ assert(bytes % 4 == 0);
+
+ /* allocate working area with flash programming code */
+ if (target_alloc_working_area(target, sizeof(nrf51_flash_write_code),
+ &write_algorithm) != ERROR_OK) {
+ LOG_WARNING("no working area available, falling back to slow memory writes");
+
+ for (; bytes > 0; bytes -= 4) {
+ retval = target_write_memory(chip->target, offset, 4, 1, buffer);
+ if (retval != ERROR_OK)
+ return retval;
+
+ retval = nrf51_wait_for_nvmc(chip);
+ if (retval != ERROR_OK)
+ return retval;
+
+ offset += 4;
+ buffer += 4;
+ }
- offset += 4;
- buffer += 4;
+ return ERROR_OK;
}
- return ERROR_OK;
+ LOG_WARNING("using fast async flash loader. This is currently supported");
+ LOG_WARNING("only with ST-Link and CMSIS-DAP. If you have issues, add");
+ LOG_WARNING("\"set WORKAREASIZE 0\" before sourcing nrf51.cfg to disable it");
+
+ retval = target_write_buffer(target, write_algorithm->address,
+ sizeof(nrf51_flash_write_code),
+ nrf51_flash_write_code);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* memory buffer */
+ while (target_alloc_working_area(target, buffer_size, &source) != ERROR_OK) {
+ buffer_size /= 2;
+ buffer_size &= ~3UL; /* Make sure it's 4 byte aligned */
+ if (buffer_size <= 256) {
+ /* free working area, write algorithm already allocated */
+ 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;
+ }
+ }
+
+ armv7m_info.common_magic = ARMV7M_COMMON_MAGIC;
+ armv7m_info.core_mode = ARM_MODE_THREAD;
+
+ init_reg_param(®_params[0], "r0", 32, PARAM_IN_OUT); /* byte count */
+ init_reg_param(®_params[1], "r1", 32, PARAM_OUT); /* buffer start */
+ init_reg_param(®_params[2], "r2", 32, PARAM_OUT); /* buffer end */
+ init_reg_param(®_params[3], "r3", 32, PARAM_IN_OUT); /* target address */
+
+ buf_set_u32(reg_params[0].value, 0, 32, bytes);
+ buf_set_u32(reg_params[1].value, 0, 32, source->address);
+ buf_set_u32(reg_params[2].value, 0, 32, source->address + source->size);
+ buf_set_u32(reg_params[3].value, 0, 32, address);
+
+ retval = target_run_flash_async_algorithm(target, buffer, bytes/4, 4,
+ 0, NULL,
+ 4, reg_params,
+ source->address, source->size,
+ write_algorithm->address, 0,
+ &armv7m_info);
+
+ target_free_working_area(target, source);
+ 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 nrf51_write_page(struct flash_bank *bank, uint32_t offset, const uint8_t *buffer)
+/* Check and erase flash sectors in specified range then start a low level page write.
+ start/end must be sector aligned.
+*/
+static int nrf51_write_pages(struct flash_bank *bank, uint32_t start, uint32_t end, const uint8_t *buffer)
{
- assert(offset % 4 == 0);
int res = ERROR_FAIL;
struct nrf51_info *chip = bank->driver_priv;
- struct flash_sector *sector = nrf51_find_sector_by_address(bank, offset);
-
- if (!sector)
- return ERROR_FLASH_SECTOR_INVALID;
-
- if (sector->is_protected)
- goto error;
+ struct flash_sector *sector;
+ uint32_t offset;
+
+ assert(start % chip->code_page_size == 0);
+ assert(end % chip->code_page_size == 0);
+
+ /* Erase all sectors */
+ for (offset = start; offset < end; offset += chip->code_page_size) {
+ sector = nrf51_find_sector_by_address(bank, offset);
+ if (!sector) {
+ LOG_ERROR("Invalid sector @ 0x%08"PRIx32, offset);
+ return ERROR_FLASH_SECTOR_INVALID;
+ }
- if (sector->is_erased != 1) {
- res = nrf51_erase_page(bank, chip, sector);
- if (res != ERROR_OK) {
- LOG_ERROR("Failed to erase sector @ 0x%08"PRIx32, sector->offset);
+ if (sector->is_protected) {
+ LOG_ERROR("Can't erase protected sector @ 0x%08"PRIx32, offset);
goto error;
}
+
+ if (sector->is_erased != 1) { /* 1 = erased, 0= not erased, -1 = unknown */
+ res = nrf51_erase_page(bank, chip, sector);
+ if (res != ERROR_OK) {
+ LOG_ERROR("Failed to erase sector @ 0x%08"PRIx32, sector->offset);
+ goto error;
+ }
+ }
+ sector->is_erased = 0;
}
res = nrf51_nvmc_write_enable(chip);
if (res != ERROR_OK)
goto error;
- sector->is_erased = 0;
-
- res = nrf51_ll_flash_write(chip, offset, buffer, chip->code_page_size);
+ res = nrf51_ll_flash_write(chip, start, buffer, (end - start));
if (res != ERROR_OK)
goto set_read_only;
set_read_only:
nrf51_nvmc_read_only(chip);
error:
- LOG_ERROR("Failed to write sector @ 0x%08"PRIx32, sector->offset);
+ LOG_ERROR("Failed to write to nrf51 flash");
return res;
}
struct nrf51_info *chip,
const uint8_t *buffer, uint32_t offset, uint32_t count)
{
- int res;
- struct {
- uint32_t start, end;
- } region;
- region.start = offset;
- region.end = offset + count;
+ int res;
+ /* Need to perform reads to fill any gaps we need to preserve in the first page,
+ before the start of buffer, or in the last page, after the end of buffer */
+ uint32_t first_page = offset/chip->code_page_size;
+ uint32_t last_page = DIV_ROUND_UP(offset+count, chip->code_page_size);
- struct {
- size_t length;
- const uint8_t *buffer;
- } start_extra, end_extra;
+ uint32_t first_page_offset = first_page * chip->code_page_size;
+ uint32_t last_page_offset = last_page * chip->code_page_size;
- start_extra.length = region.start % chip->code_page_size;
- start_extra.buffer = buffer;
- end_extra.length = region.end % chip->code_page_size;
- end_extra.buffer = buffer + count - end_extra.length;
+ LOG_DEBUG("Padding write from 0x%08"PRIx32"-0x%08"PRIx32" as 0x%08"PRIx32"-0x%08"PRIx32,
+ offset, offset+count, first_page_offset, last_page_offset);
- if (start_extra.length) {
- uint8_t page[chip->code_page_size];
+ uint32_t page_cnt = last_page - first_page;
+ uint8_t buffer_to_flash[page_cnt*chip->code_page_size];
+ /* Fill in any space between start of first page and start of buffer */
+ uint32_t pre = offset - first_page_offset;
+ if (pre > 0) {
res = target_read_memory(bank->target,
- region.start - start_extra.length,
- 1, start_extra.length, page);
- if (res != ERROR_OK)
- return res;
-
- memcpy(page + start_extra.length,
- start_extra.buffer,
- chip->code_page_size - start_extra.length);
-
- res = nrf51_write_page(bank,
- region.start - start_extra.length,
- page);
+ first_page_offset,
+ 1,
+ pre,
+ buffer_to_flash);
if (res != ERROR_OK)
return res;
}
- if (end_extra.length) {
- uint8_t page[chip->code_page_size];
+ /* Fill in main contents of buffer */
+ memcpy(buffer_to_flash+pre, buffer, count);
+ /* Fill in any space between end of buffer and end of last page */
+ uint32_t post = last_page_offset - (offset+count);
+ if (post > 0) {
/* Retrieve the full row contents from Flash */
res = target_read_memory(bank->target,
- region.end,
- 1,
- (chip->code_page_size - end_extra.length),
- page + end_extra.length);
- if (res != ERROR_OK)
- return res;
-
- memcpy(page, end_extra.buffer, end_extra.length);
-
- res = nrf51_write_page(bank,
- region.end - end_extra.length,
- page);
+ offset + count,
+ 1,
+ post,
+ buffer_to_flash+pre+count);
if (res != ERROR_OK)
return res;
}
-
- region.start += start_extra.length;
- region.end -= end_extra.length;
-
- for (uint32_t address = region.start; address < region.end;
- address += chip->code_page_size) {
- res = nrf51_write_page(bank, address, &buffer[address - region.start]);
-
- if (res != ERROR_OK)
- return res;
-
- }
-
- return ERROR_OK;
+ return nrf51_write_pages(bank, first_page_offset, last_page_offset, buffer_to_flash);
}
static int nrf51_uicr_flash_write(struct flash_bank *bank,
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