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target_atmel_cm4.c
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target_atmel_cm4.c
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// SPDX-License-Identifier: BSD-3-Clause
// Copyright (c) 2013-2019, Alex Taradov <[email protected]>. All rights reserved.
/*- Includes ----------------------------------------------------------------*/
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include "target.h"
#include "edbg.h"
#include "dap.h"
/*- Definitions -------------------------------------------------------------*/
#define FLASH_START 0x00400000
#define FLASH_PAGE_SIZE 512
#define DHCSR 0xe000edf0
#define DHCSR_DEBUGEN (1 << 0)
#define DHCSR_HALT (1 << 1)
#define DHCSR_DBGKEY (0xa05f << 16)
#define DEMCR 0xe000edfc
#define DEMCR_VC_CORERESET (1 << 0)
#define AIRCR 0xe000ed0c
#define AIRCR_VECTKEY (0x05fa << 16)
#define AIRCR_SYSRESETREQ (1 << 2)
#define CHIPID_CIDR 0x400e0740
#define CHIPID_EXID 0x400e0744
#define EEFC_FMR(n) (0x400e0a00 + (n) * 0x200)
#define EEFC_FCR(n) (0x400e0a04 + (n) * 0x200)
#define EEFC_FSR(n) (0x400e0a08 + (n) * 0x200)
#define EEFC_FRR(n) (0x400e0a0c + (n) * 0x200)
#define FSR_FRDY 1
#define CMD_GETD 0x5a000000
#define CMD_WP 0x5a000001
#define CMD_EPA 0x5a000007
#define CMD_EA 0x5a000005
#define CMD_SGPB 0x5a00000b
#define CMD_CGPB 0x5a00000c
#define CMD_GGPB 0x5a00000d
#define PAGES_IN_ERASE_BLOCK 16
#define GPNVM_SIZE 1
#define GPNVM_SIZE_BITS 8
/*- Types -------------------------------------------------------------------*/
typedef struct
{
uint32_t chip_id;
uint32_t chip_exid;
char *family;
char *name;
uint32_t n_planes;
uint32_t flash_size;
} device_t;
/*- Variables ---------------------------------------------------------------*/
static device_t devices[] =
{
{ 0x243b09e0, 0x00000000, "samg51", "SAM G51G18", 1, 256*1024 },
{ 0x243b09e8, 0x00000000, "samg51", "SAM G51N18", 1, 256*1024 },
{ 0x247e0ae0, 0x00000000, "samg53", "SAM G53G19 (Rev A)", 1, 512*1024 },
{ 0x247e0ae1, 0x00000000, "samg53", "SAM G53G19 (Rev B)", 1, 512*1024 },
{ 0x247e0ae8, 0x00000000, "samg53", "SAM G53N19 (Rev A)", 1, 512*1024 },
{ 0x247e0ae9, 0x00000000, "samg53", "SAM G53N19 (Rev B)", 1, 512*1024 },
{ 0x247e0ae2, 0x00000000, "samg54", "SAM G54G19 (Rev A)", 1, 512*1024 },
{ 0x247e0ae3, 0x00000000, "samg54", "SAM G54G19 (Rev B)", 1, 512*1024 },
{ 0x247e0ae6, 0x00000000, "samg54", "SAM G54J19 (Rev A)", 1, 512*1024 },
{ 0x247e0aea, 0x00000000, "samg54", "SAM G54N19 (Rev A)", 1, 512*1024 },
{ 0x247e0aeb, 0x00000000, "samg54", "SAM G54N19 (Rev B)", 1, 512*1024 },
{ 0x24470ae0, 0x00000000, "samg55", "SAM G55G19", 1, 512*1024 },
{ 0x24570ae0, 0x00000000, "samg55", "SAM G55J19 (Rev A)", 1, 512*1024 },
{ 0x24570ae1, 0x00000000, "samg55", "SAM G55J19 (Rev B)", 1, 512*1024 },
{ 0x29970ee0, 0x00000000, "sam4sd", "SAM4SD32B (Rev A)", 2, 1024*1024 },
{ 0x29970ee1, 0x00000000, "sam4sd", "SAM4SD32B (Rev B)", 2, 1024*1024 },
{ 0x29a70ee0, 0x00000000, "sam4sd", "SAM4SD32C (Rev A)", 2, 1024*1024 },
{ 0x29a70ee1, 0x00000000, "sam4sd", "SAM4SD32C (Rev B)", 2, 1024*1024 },
{ 0x29970ce0, 0x00000000, "sam4sd", "SAM4SD16B (Rev A)", 2, 512*1024 },
{ 0x29970ce0, 0x00000000, "sam4sd", "SAM4SD16B (Rev B)", 2, 512*1024 },
{ 0x29a70ce0, 0x00000000, "sam4sd", "SAM4SD16C (Rev A)", 2, 512*1024 },
{ 0x29a70ce1, 0x00000000, "sam4sd", "SAM4SD16C (Rev B)", 2, 512*1024 },
{ 0x28970ce0, 0x00000000, "sam4sa", "SAM4SA16B (Rev A)", 1, 1024*1024 },
{ 0x28970ce1, 0x00000000, "sam4sa", "SAM4SA16B (Rev B)", 1, 1024*1024 },
{ 0x28a70ce0, 0x00000000, "sam4sa", "SAM4SA16C (Rev A)", 1, 1024*1024 },
{ 0x28a70ce1, 0x00000000, "sam4sa", "SAM4SA16C (Rev B)", 1, 1024*1024 },
{ 0x289c0ce0, 0x00000000, "sam4s", "SAM4S16B (Rev A)", 1, 1024*1024 },
{ 0x289c0ce1, 0x00000000, "sam4s", "SAM4S16B (Rev B)", 1, 1024*1024 },
{ 0x28ac0ce0, 0x00000000, "sam4s", "SAM4S16C (Rev A)", 1, 1024*1024 },
{ 0x28ac0ce1, 0x00000000, "sam4s", "SAM4S16C (Rev B)", 1, 1024*1024 },
{ 0x289c0ae0, 0x00000000, "sam4s", "SAM4S8B (Rev A)", 1, 512*1024 },
{ 0x289c0ae1, 0x00000000, "sam4s", "SAM4S8B (Rev B)", 1, 512*1024 },
{ 0x28ac0ae0, 0x00000000, "sam4s", "SAM4S8C (Rev A)", 1, 512*1024 },
{ 0x28ac0ae1, 0x00000000, "sam4s", "SAM4S8C (Rev B)", 1, 512*1024 },
{ 0x288b09e0, 0x00000000, "sam4s", "SAM4S4A (Rev A)", 1, 256*1024 },
{ 0x288b09e1, 0x00000000, "sam4s", "SAM4S4A (Rev B)", 1, 256*1024 },
{ 0x289b09e0, 0x00000000, "sam4s", "SAM4S4B (Rev A)", 1, 256*1024 },
{ 0x289b09e1, 0x00000000, "sam4s", "SAM4S4B (Rev B)", 1, 256*1024 },
{ 0x28ab09e0, 0x00000000, "sam4s", "SAM4S4C (Rev A)", 1, 256*1024 },
{ 0x28ab09e1, 0x00000000, "sam4s", "SAM4S4C (Rev B)", 1, 256*1024 },
{ 0x288b07e0, 0x00000000, "sam4s", "SAM4S2A (Rev A)", 1, 128*1024 },
{ 0x288b07e1, 0x00000000, "sam4s", "SAM4S2A (Rev B)", 1, 128*1024 },
{ 0x289b07e0, 0x00000000, "sam4s", "SAM4S2B (Rev A)", 1, 128*1024 },
{ 0x289b07e1, 0x00000000, "sam4s", "SAM4S2B (Rev B)", 1, 128*1024 },
{ 0x28ab07e0, 0x00000000, "sam4s", "SAM4S2C (Rev A)", 1, 128*1024 },
{ 0x28ab07e1, 0x00000000, "sam4s", "SAM4S2C (Rev B)", 1, 128*1024 },
{ 0xa3cc0ce0, 0x00120200, "sam4e", "SAM4E16E", 1, 1024*1024 },
{ 0xa3cc0ce0, 0x00120208, "sam4e", "SAM4E8E", 1, 512*1024 },
{ 0xa3cc0ce0, 0x00120201, "sam4e", "SAM4E16C", 1, 1024*1024 },
{ 0xa3cc0ce0, 0x00120209, "sam4e", "SAM4E8C", 1, 512*1024 },
{ 0x29460ce0, 0x00000000, "sam4n", "SAM4N16B (Rev A)", 1, 1024*1024 },
{ 0x29560ce0, 0x00000000, "sam4n", "SAM4N16C (Rev A)", 1, 1024*1024 },
{ 0x293b0ae0, 0x00000000, "sam4n", "SAM4N8A (Rev A)", 1, 512*1024 },
{ 0x294b0ae0, 0x00000000, "sam4n", "SAM4N8B (Rev A)", 1, 512*1024 },
{ 0x295b0ae0, 0x00000000, "sam4n", "SAM4N8C (Rev A)", 1, 512*1024 },
};
static device_t target_device;
static target_options_t target_options;
/*- Implementations ---------------------------------------------------------*/
//-----------------------------------------------------------------------------
static void target_select(target_options_t *options)
{
uint32_t chip_id, chip_exid;
dap_reset_target_hw(1);
dap_reset_link();
// Stop the core
dap_write_word(DHCSR, DHCSR_DBGKEY | DHCSR_DEBUGEN | DHCSR_HALT);
dap_write_word(DEMCR, DEMCR_VC_CORERESET);
dap_write_word(AIRCR, AIRCR_VECTKEY | AIRCR_SYSRESETREQ);
chip_id = dap_read_word(CHIPID_CIDR);
chip_exid = dap_read_word(CHIPID_EXID);
for (int i = 0; i < ARRAY_SIZE(devices); i++)
{
uint32_t fl_id, fl_size, fl_page_size, fl_nb_palne, fl_nb_lock;
if (devices[i].chip_id != chip_id || devices[i].chip_exid != chip_exid)
continue;
verbose("Target: %s\n", devices[i].name);
for (uint32_t plane = 0; plane < devices[i].n_planes; plane++)
{
dap_write_word(EEFC_FCR(plane), CMD_GETD);
while (0 == (dap_read_word(EEFC_FSR(plane)) & FSR_FRDY));
fl_id = dap_read_word(EEFC_FRR(plane));
check(fl_id, "Cannot read flash descriptor, check Erase pin state");
fl_size = dap_read_word(EEFC_FRR(plane));
check(fl_size == devices[i].flash_size, "Invalid reported Flash size (%d)", fl_size);
fl_page_size = dap_read_word(EEFC_FRR(plane));
check(fl_page_size == FLASH_PAGE_SIZE, "Invalid reported page size (%d)", fl_page_size);
fl_nb_palne = dap_read_word(EEFC_FRR(plane));
for (uint32_t i = 0; i < fl_nb_palne; i++)
dap_read_word(EEFC_FRR(plane));
fl_nb_lock = dap_read_word(EEFC_FRR(plane));
for (uint32_t i = 0; i < fl_nb_lock; i++)
dap_read_word(EEFC_FRR(plane));
}
target_device = devices[i];
target_options = *options;
target_check_options(&target_options, devices[i].flash_size * target_device.n_planes,
FLASH_PAGE_SIZE * PAGES_IN_ERASE_BLOCK);
return;
}
error_exit("unknown target device (CHIP_ID = 0x%08x)", chip_id);
}
//-----------------------------------------------------------------------------
static void target_deselect(void)
{
dap_write_word(DEMCR, 0);
dap_write_word(AIRCR, AIRCR_VECTKEY | AIRCR_SYSRESETREQ);
target_free_options(&target_options);
}
//-----------------------------------------------------------------------------
static void target_erase(void)
{
for (uint32_t plane = 0; plane < target_device.n_planes; plane++)
dap_write_word(EEFC_FCR(plane), CMD_EA);
for (uint32_t plane = 0; plane < target_device.n_planes; plane++)
while (0 == (dap_read_word(EEFC_FSR(plane)) & FSR_FRDY));
}
//-----------------------------------------------------------------------------
static void target_lock(void)
{
// It is enough to lock just one plane to lock the entire device
dap_write_word(EEFC_FCR(0), CMD_SGPB | (0 << 8));
}
//-----------------------------------------------------------------------------
static void target_program(void)
{
uint32_t addr = FLASH_START + target_options.offset;
uint32_t number_of_pages, plane, page_offset;
uint32_t offs = 0;
uint8_t *buf = target_options.file_data;
uint32_t size = target_options.file_size;
number_of_pages = (size + FLASH_PAGE_SIZE - 1) / FLASH_PAGE_SIZE;
page_offset = target_options.offset / FLASH_PAGE_SIZE;
for (uint32_t page = 0; page < number_of_pages; page += PAGES_IN_ERASE_BLOCK)
{
plane = (page + page_offset) / (target_device.flash_size / FLASH_PAGE_SIZE);
dap_write_word(EEFC_FCR(plane), CMD_EPA | (((page_offset + page) | 2) << 8));
while (0 == (dap_read_word(EEFC_FSR(plane)) & FSR_FRDY));
verbose(".");
}
verbose(",");
for (uint32_t page = 0; page < number_of_pages; page++)
{
dap_write_block(addr, &buf[offs], FLASH_PAGE_SIZE);
addr += FLASH_PAGE_SIZE;
offs += FLASH_PAGE_SIZE;
plane = (page + page_offset) / (target_device.flash_size / FLASH_PAGE_SIZE);
dap_write_word(EEFC_FCR(plane), CMD_WP | ((page + page_offset) << 8));
while (0 == (dap_read_word(EEFC_FSR(plane)) & FSR_FRDY));
verbose(".");
}
}
//-----------------------------------------------------------------------------
static void target_verify(void)
{
uint32_t addr = FLASH_START + target_options.offset;
uint32_t block_size;
uint32_t offs = 0;
uint8_t *bufb;
uint8_t *bufa = target_options.file_data;
uint32_t size = target_options.file_size;
bufb = buf_alloc(FLASH_PAGE_SIZE);
while (size)
{
dap_read_block(addr, bufb, FLASH_PAGE_SIZE);
block_size = (size > FLASH_PAGE_SIZE) ? FLASH_PAGE_SIZE : size;
for (int i = 0; i < (int)block_size; i++)
{
if (bufa[offs + i] != bufb[i])
{
verbose("\nat address 0x%x expected 0x%02x, read 0x%02x\n",
addr + i, bufa[offs + i], bufb[i]);
buf_free(bufb);
error_exit("verification failed");
}
}
addr += FLASH_PAGE_SIZE;
offs += FLASH_PAGE_SIZE;
size -= block_size;
verbose(".");
}
buf_free(bufb);
}
//-----------------------------------------------------------------------------
static void target_read(void)
{
uint32_t addr = FLASH_START + target_options.offset;
uint32_t offs = 0;
uint8_t *buf = target_options.file_data;
uint32_t size = target_options.size;
while (size)
{
dap_read_block(addr, &buf[offs], FLASH_PAGE_SIZE);
addr += FLASH_PAGE_SIZE;
offs += FLASH_PAGE_SIZE;
size -= FLASH_PAGE_SIZE;
verbose(".");
}
save_file(target_options.name, buf, target_options.size);
}
//-----------------------------------------------------------------------------
static int target_fuse_read(int section, uint8_t *data)
{
uint32_t gpnvm;
if (section > 0)
return 0;
dap_write_word(EEFC_FCR(0), CMD_GGPB);
while (0 == (dap_read_word(EEFC_FSR(0)) & FSR_FRDY));
gpnvm = dap_read_word(EEFC_FRR(0));
data[0] = gpnvm;
return GPNVM_SIZE;
}
//-----------------------------------------------------------------------------
static void target_fuse_write(int section, uint8_t *data)
{
uint32_t gpnvm = data[0];
check(0 == section, "internal: incorrect section index in target_fuse_write()");
for (int i = 0; i < GPNVM_SIZE_BITS; i++)
{
if (gpnvm & (1 << i))
dap_write_word(EEFC_FCR(0), CMD_SGPB | (i << 8));
else
dap_write_word(EEFC_FCR(0), CMD_CGPB | (i << 8));
}
}
//-----------------------------------------------------------------------------
static char *target_enumerate(int i)
{
if (i < ARRAY_SIZE(devices))
return devices[i].family;
return NULL;
}
//-----------------------------------------------------------------------------
static char target_help[] =
"Fuses:\n"
" This device has one fuses section, which represents GPNVM bits.\n";
//-----------------------------------------------------------------------------
target_ops_t target_atmel_cm4_ops =
{
.select = target_select,
.deselect = target_deselect,
.erase = target_erase,
.lock = target_lock,
.unlock = target_erase,
.program = target_program,
.verify = target_verify,
.read = target_read,
.fread = target_fuse_read,
.fwrite = target_fuse_write,
.enumerate = target_enumerate,
.help = target_help,
};