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// SPDX-License-Identifier: GPL-2.0-or-later
/***************************************************************************
* Copyright (C) 2008 by Kevin McGuire *
* Copyright (C) 2008 by Marcel Wijlaars *
* Copyright (C) 2009 by Michael Ashton *
***************************************************************************/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "imp.h"
#include <helper/binarybuffer.h>
#include <helper/time_support.h>
#include <target/algorithm.h>
#include <target/arm.h>
static int aduc702x_build_sector_list(struct flash_bank *bank);
static int aduc702x_check_flash_completion(struct target *target, unsigned int timeout_ms);
static int aduc702x_set_write_enable(struct target *target, int enable);
#define ADUC702X_FLASH 0xfffff800
#define ADUC702X_FLASH_FEESTA (0*4)
#define ADUC702X_FLASH_FEEMOD (1*4)
#define ADUC702X_FLASH_FEECON (2*4)
#define ADUC702X_FLASH_FEEDAT (3*4)
#define ADUC702X_FLASH_FEEADR (4*4)
#define ADUC702X_FLASH_FEESIGN (5*4)
#define ADUC702X_FLASH_FEEPRO (6*4)
#define ADUC702X_FLASH_FEEHIDE (7*4)
/* flash bank aduc702x 0 0 0 0 <target#>
* The ADC7019-28 devices all have the same flash layout */
FLASH_BANK_COMMAND_HANDLER(aduc702x_flash_bank_command)
{
bank->base = 0x80000;
bank->size = 0xF800; /* top 4k not accessible */
aduc702x_build_sector_list(bank);
return ERROR_OK;
}
static int aduc702x_build_sector_list(struct flash_bank *bank)
{
/* aduc7026_struct flash_bank *aduc7026_info = bank->driver_priv; */
uint32_t offset = 0;
/* sector size is 512 */
bank->num_sectors = bank->size / 512;
bank->sectors = malloc(sizeof(struct flash_sector) * bank->num_sectors);
for (unsigned int i = 0; i < bank->num_sectors; ++i) {
bank->sectors[i].offset = offset;
bank->sectors[i].size = 512;
offset += bank->sectors[i].size;
bank->sectors[i].is_erased = -1;
bank->sectors[i].is_protected = 0;
}
return ERROR_OK;
}
static int aduc702x_erase(struct flash_bank *bank, unsigned int first,
unsigned int last)
{
/* int res; */
int x;
int count;
/* uint32_t v; */
struct target *target = bank->target;
aduc702x_set_write_enable(target, 1);
/* mass erase */
if (((first | last) == 0) || ((first == 0) && (last >= bank->num_sectors))) {
LOG_DEBUG("performing mass erase.");
target_write_u16(target, ADUC702X_FLASH + ADUC702X_FLASH_FEEDAT, 0x3cff);
target_write_u16(target, ADUC702X_FLASH + ADUC702X_FLASH_FEEADR, 0xffc3);
target_write_u8(target, ADUC702X_FLASH + ADUC702X_FLASH_FEECON, 0x06);
if (aduc702x_check_flash_completion(target, 3500) != ERROR_OK) {
LOG_ERROR("mass erase failed");
aduc702x_set_write_enable(target, 0);
return ERROR_FLASH_OPERATION_FAILED;
}
LOG_DEBUG("mass erase successful.");
return ERROR_OK;
} else {
unsigned long adr;
count = last - first + 1;
for (x = 0; x < count; ++x) {
adr = bank->base + ((first + x) * 512);
target_write_u16(target, ADUC702X_FLASH + ADUC702X_FLASH_FEEADR, adr);
target_write_u8(target, ADUC702X_FLASH + ADUC702X_FLASH_FEECON, 0x05);
if (aduc702x_check_flash_completion(target, 50) != ERROR_OK) {
LOG_ERROR("failed to erase sector at address 0x%08lX", adr);
aduc702x_set_write_enable(target, 0);
return ERROR_FLASH_SECTOR_NOT_ERASED;
}
LOG_DEBUG("erased sector at address 0x%08lX", adr);
}
}
aduc702x_set_write_enable(target, 0);
return ERROR_OK;
}
/* If this fn returns ERROR_TARGET_RESOURCE_NOT_AVAILABLE, then the caller can fall
* back to another mechanism that does not require onboard RAM
*
* Caller should not check for other return values specifically
*/
static int aduc702x_write_block(struct flash_bank *bank,
const uint8_t *buffer,
uint32_t offset,
uint32_t count)
{
struct target *target = bank->target;
uint32_t buffer_size = 7000;
struct working_area *write_algorithm;
struct working_area *source;
uint32_t address = bank->base + offset;
struct reg_param reg_params[6];
struct arm_algorithm arm_algo;
int retval = ERROR_OK;
if (((count%2) != 0) || ((offset%2) != 0)) {
LOG_ERROR("write block must be multiple of two bytes in offset & length");
return ERROR_FAIL;
}
/* parameters:
r0 - address of source data (absolute)
r1 - number of halfwords to be copied
r2 - start address in flash (offset from beginning of flash memory)
r3 - exit code
r4 - base address of flash controller (0xFFFFF800)
registers:
r5 - scratch
r6 - set to 2, used to write flash command
*/
static const uint32_t aduc702x_flash_write_code[] = {
/* <_start>: */
0xe3a05008, /* mov r5, #8 ; 0x8 */
0xe5845004, /* str r5, [r4, #4] */
0xe3a06002, /* mov r6, #2 ; 0x2 */
/* <next>: */
0xe1c421b0, /* strh r2, [r4, #16] */
0xe0d050b2, /* ldrh r5, [r0], #2 */
0xe1c450bc, /* strh r5, [r4, #12] */
0xe5c46008, /* strb r6, [r4, #8] */
/* <wait_complete>: */
0xe1d430b0, /* ldrh r3, [r4] */
0xe3130004, /* tst r3, #4 ; 0x4 */
0x1afffffc, /* bne 1001c <wait_complete> */
0xe2822002, /* add r2, r2, #2 ; 0x2 */
0xe2511001, /* subs r1, r1, #1 ; 0x1 */
0x0a000001, /* beq 1003c <done> */
0xe3130001, /* tst r3, #1 ; 0x1 */
0x1afffff3, /* bne 1000c <next> */
/* <done>: */
0xeafffffe /* b 1003c <done> */
};
/* flash write code */
if (target_alloc_working_area(target, sizeof(aduc702x_flash_write_code),
&write_algorithm) != ERROR_OK) {
LOG_WARNING("no working area available, can't do block memory writes");
return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
}
uint8_t code[sizeof(aduc702x_flash_write_code)];
target_buffer_set_u32_array(target, code, ARRAY_SIZE(aduc702x_flash_write_code),
aduc702x_flash_write_code);
retval = target_write_buffer(target, write_algorithm->address, sizeof(code), code);
if (retval != ERROR_OK)
return retval;
/* memory buffer */
while (target_alloc_working_area_try(target, buffer_size, &source) != ERROR_OK) {
buffer_size /= 2;
if (buffer_size <= 256) {
/* we already allocated the writing code, but failed to get a buffer,
*free the 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;
}
}
arm_algo.common_magic = ARM_COMMON_MAGIC;
arm_algo.core_mode = ARM_MODE_SVC;
arm_algo.core_state = ARM_STATE_ARM;
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);
init_reg_param(®_params[4], "r4", 32, PARAM_OUT);
while (count > 0) {
uint32_t thisrun_count = (count > buffer_size) ? buffer_size : count;
retval = target_write_buffer(target, source->address, thisrun_count, buffer);
if (retval != ERROR_OK)
break;
buf_set_u32(reg_params[0].value, 0, 32, source->address);
buf_set_u32(reg_params[1].value, 0, 32, thisrun_count/2);
buf_set_u32(reg_params[2].value, 0, 32, address);
buf_set_u32(reg_params[4].value, 0, 32, 0xFFFFF800);
retval = target_run_algorithm(target, 0, NULL, 5,
reg_params, write_algorithm->address,
write_algorithm->address +
sizeof(aduc702x_flash_write_code) - 4,
10000, &arm_algo);
if (retval != ERROR_OK) {
LOG_ERROR("error executing aduc702x flash write algorithm");
break;
}
if ((buf_get_u32(reg_params[3].value, 0, 32) & 1) != 1) {
/* FIX!!!! what does this mean??? replace w/sensible error message */
LOG_ERROR("aduc702x detected error writing flash");
retval = ERROR_FAIL;
break;
}
buffer += thisrun_count;
address += thisrun_count;
count -= thisrun_count;
}
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]);
destroy_reg_param(®_params[4]);
return retval;
}
/* All-JTAG, single-access method. Very slow. Used only if there is no
* working area available. */
static int aduc702x_write_single(struct flash_bank *bank,
const uint8_t *buffer,
uint32_t offset,
uint32_t count)
{
uint32_t x;
uint8_t b;
struct target *target = bank->target;
aduc702x_set_write_enable(target, 1);
for (x = 0; x < count; x += 2) {
/* FEEADR = address */
target_write_u16(target, ADUC702X_FLASH + ADUC702X_FLASH_FEEADR, offset + x);
/* set up data */
if ((x + 1) == count) {
/* last byte */
target_read_u8(target, offset + x + 1, &b);
} else
b = buffer[x + 1];
target_write_u16(target, ADUC702X_FLASH + ADUC702X_FLASH_FEEDAT, buffer[x] | (b << 8));
/* do single-write command */
target_write_u8(target, ADUC702X_FLASH + ADUC702X_FLASH_FEECON, 0x02);
if (aduc702x_check_flash_completion(target, 1) != ERROR_OK) {
LOG_ERROR("single write failed for address 0x%08lX",
(unsigned long)(offset + x));
aduc702x_set_write_enable(target, 0);
return ERROR_FLASH_OPERATION_FAILED;
}
}
LOG_DEBUG("wrote %d bytes at address 0x%08lX", (int)count, (unsigned long)(offset + x));
aduc702x_set_write_enable(target, 0);
return ERROR_OK;
}
static int aduc702x_write(struct flash_bank *bank, const uint8_t *buffer, uint32_t offset, uint32_t count)
{
int retval;
/* try using a block write */
retval = aduc702x_write_block(bank, buffer, offset, count);
if (retval != ERROR_OK) {
if (retval == ERROR_TARGET_RESOURCE_NOT_AVAILABLE) {
/* if block write failed (no sufficient working area),
* use normal (slow) JTAG method */
LOG_WARNING("couldn't use block writes, falling back to single memory accesses");
retval = aduc702x_write_single(bank, buffer, offset, count);
if (retval != ERROR_OK) {
LOG_ERROR("slow write failed");
return ERROR_FLASH_OPERATION_FAILED;
}
}
}
return retval;
}
static int aduc702x_probe(struct flash_bank *bank)
{
return ERROR_OK;
}
/* sets FEEMOD bit 3
* enable = 1 enables writes & erases, 0 disables them */
static int aduc702x_set_write_enable(struct target *target, int enable)
{
/* don't bother to preserve int enable bit here */
target_write_u16(target, ADUC702X_FLASH + ADUC702X_FLASH_FEEMOD, enable ? 8 : 0);
return ERROR_OK;
}
/* wait up to timeout_ms for controller to not be busy,
* then check whether the command passed or failed.
*
* this function sleeps 1ms between checks (after the first one),
* so in some cases may slow things down without a usleep after the first read */
static int aduc702x_check_flash_completion(struct target *target, unsigned int timeout_ms)
{
uint8_t v = 4;
int64_t endtime = timeval_ms() + timeout_ms;
while (1) {
target_read_u8(target, ADUC702X_FLASH + ADUC702X_FLASH_FEESTA, &v);
if ((v & 4) == 0)
break;
alive_sleep(1);
if (timeval_ms() >= endtime)
break;
}
if (v & 2)
return ERROR_FAIL;
/* if a command is ignored, both the success and fail bits may be 0 */
else if ((v & 3) == 0)
return ERROR_FAIL;
else
return ERROR_OK;
}
const struct flash_driver aduc702x_flash = {
.name = "aduc702x",
.flash_bank_command = aduc702x_flash_bank_command,
.erase = aduc702x_erase,
.write = aduc702x_write,
.read = default_flash_read,
.probe = aduc702x_probe,
.auto_probe = aduc702x_probe,
.erase_check = default_flash_blank_check,
};
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