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blackmagic/src/lpc11xx.c

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C
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#include <stdlib.h>
#include <string.h>
#include <stddef.h>
#include "general.h"
#include "adiv5.h"
#include "target.h"
#define IAP_PGM_CHUNKSIZE 256 /* should fit in RAM on any device */
struct flash_param {
uint16_t opcodes[2]; /* two opcodes to return to after calling the ROM */
uint32_t command[5]; /* command operands */
uint32_t result[4]; /* result data */
};
struct flash_program {
struct flash_param p;
uint8_t data[IAP_PGM_CHUNKSIZE];
};
static struct flash_program flash_pgm;
#define MSP 17 /* Main stack pointer register number */
#define MIN_RAM_SIZE_FOR_LPC8xx 1024
#define MIN_RAM_SIZE_FOR_LPC1xxx 2048
#define RAM_USAGE_FOR_IAP_ROUTINES 32 /* IAP routines use 32 bytes at top of ram */
#define IAP_ENTRYPOINT 0x1fff1ff1
#define IAP_RAM_BASE 0x10000000
#define IAP_CMD_PREPARE 50
#define IAP_CMD_PROGRAM 51
#define IAP_CMD_ERASE 52
#define IAP_CMD_BLANKCHECK 53
#define IAP_STATUS_CMD_SUCCESS 0
#define IAP_STATUS_INVALID_COMMAND 1
#define IAP_STATUS_SRC_ADDR_ERROR 2
#define IAP_STATUS_DST_ADDR_ERROR 3
#define IAP_STATUS_SRC_ADDR_NOT_MAPPED 4
#define IAP_STATUS_DST_ADDR_NOT_MAPPED 5
#define IAP_STATUS_COUNT_ERROR 6
#define IAP_STATUS_INVALID_SECTOR 7
#define IAP_STATUS_SECTOR_NOT_BLANK 8
#define IAP_STATUS_SECTOR_NOT_PREPARED 9
#define IAP_STATUS_COMPARE_ERROR 10
#define IAP_STATUS_BUSY 11
static const char lpc8xx_driver[] = "lpc8xx";
static const char lpc11xx_driver[] = "lpc11xx";
static void lpc11x_iap_call(struct target_s *target, struct flash_param *param, unsigned param_len);
static int lpc11xx_flash_prepare(struct target_s *target, uint32_t addr, int len);
static int lpc11xx_flash_erase(struct target_s *target, uint32_t addr, int len);
static int lpc11xx_flash_write(struct target_s *target, uint32_t dest, const uint8_t *src,
int len);
/*
* Note that this memory map is actually for the largest of the lpc11xx devices;
* There seems to be no good way to decode the part number to determine the RAM
* and flash sizes.
*/
static const char lpc11xx_xml_memory_map[] = "<?xml version=\"1.0\"?>"
/* "<!DOCTYPE memory-map "
" PUBLIC \"+//IDN gnu.org//DTD GDB Memory Map V1.0//EN\""
" \"http://sourceware.org/gdb/gdb-memory-map.dtd\">"*/
"<memory-map>"
" <memory type=\"flash\" start=\"0x00000000\" length=\"0x20000\">"
" <property name=\"blocksize\">0x1000</property>"
" </memory>"
" <memory type=\"ram\" start=\"0x10000000\" length=\"0x2000\"/>"
"</memory-map>";
/*
* Memory map for the lpc8xx devices, which otherwise look much like the lpc11xx.
*
* We could decode the RAM/flash sizes, but we just encode the largest possible here.
*
* Note that the LPC810 and LPC811 map their flash oddly; see the NXP LPC800 user
* manual (UM10601) for more details.
*/
static const char lpc8xx_xml_memory_map[] = "<?xml version=\"1.0\"?>"
/* "<!DOCTYPE memory-map "
" PUBLIC \"+//IDN gnu.org//DTD GDB Memory Map V1.0//EN\""
" \"http://sourceware.org/gdb/gdb-memory-map.dtd\">"*/
"<memory-map>"
" <memory type=\"flash\" start=\"0x00000000\" length=\"0x4000\">"
" <property name=\"blocksize\">0x400</property>"
" </memory>"
" <memory type=\"ram\" start=\"0x10000000\" length=\"0x1000\"/>"
"</memory-map>";
bool
lpc11xx_probe(struct target_s *target)
{
uint32_t idcode;
/* read the device ID register */
idcode = adiv5_ap_mem_read(adiv5_target_ap(target), 0x400483F4);
switch (idcode) {
case 0x041E502B:
case 0x2516D02B:
case 0x0416502B:
case 0x2516902B: /* lpc1111 */
case 0x2524D02B:
case 0x0425502B:
case 0x2524902B:
case 0x1421102B: /* lpc1112 */
case 0x0434502B:
case 0x2532902B:
case 0x0434102B:
case 0x2532102B: /* lpc1113 */
case 0x0444502B:
case 0x2540902B:
case 0x0444102B:
case 0x2540102B:
case 0x1440102B: /* lpc1114 */
case 0x0A40902B:
case 0x1A40902B:
case 0x2058002B: /* lpc1115 */
case 0x1431102B: /* lpc11c22 */
case 0x1430102B: /* lpc11c24 */
case 0x095C802B: /* lpc11u12x/201 */
case 0x295C802B:
case 0x097A802B: /* lpc11u13/201 */
case 0x297A802B:
case 0x0998802B: /* lpc11u14x/201 */
case 0x2998802B:
case 0x2972402B: /* lpc11u23/301 */
case 0x2988402B: /* lpc11u24x/301 */
case 0x2980002B: /* lpc11u24x/401 */
target->driver = lpc11xx_driver;
target->xml_mem_map = lpc11xx_xml_memory_map;
target->flash_erase = lpc11xx_flash_erase;
target->flash_write = lpc11xx_flash_write;
return true;
case 0x1812202b: /* LPC812M101FDH20 */
target->driver = lpc8xx_driver;
target->xml_mem_map = lpc8xx_xml_memory_map;
target->flash_erase = lpc11xx_flash_erase;
target->flash_write = lpc11xx_flash_write;
return true;
}
return false;
}
static void
lpc11x_iap_call(struct target_s *target, struct flash_param *param, unsigned param_len)
{
uint32_t regs[target->regs_size / sizeof(uint32_t)];
/* fill out the remainder of the parameters and copy the structure to RAM */
param->opcodes[0] = 0xbe00;
param->opcodes[1] = 0x0000;
target_mem_write_words(target, IAP_RAM_BASE, (void *)param, param_len);
/* set up for the call to the IAP ROM */
target_regs_read(target, regs);
regs[0] = IAP_RAM_BASE + offsetof(struct flash_param, command);
regs[1] = IAP_RAM_BASE + offsetof(struct flash_param, result);
// stack pointer - top of the smallest ram less 32 for IAP usage
if (target->driver == lpc8xx_driver)
regs[MSP] = IAP_RAM_BASE + MIN_RAM_SIZE_FOR_LPC8xx - RAM_USAGE_FOR_IAP_ROUTINES;
else
regs[MSP] = IAP_RAM_BASE + MIN_RAM_SIZE_FOR_LPC1xxx - RAM_USAGE_FOR_IAP_ROUTINES;
regs[14] = IAP_RAM_BASE | 1;
regs[15] = IAP_ENTRYPOINT;
target_regs_write(target, regs);
/* start the target and wait for it to halt again */
target_halt_resume(target, 0);
while (!target_halt_wait(target));
/* copy back just the parameters structure */
target_mem_read_words(target, (void *)param, IAP_RAM_BASE, sizeof(struct flash_param));
}
static int flash_page_size(struct target_s *target)
{
if (target->driver == lpc8xx_driver)
return 1024;
else
return 4096;
}
static int
lpc11xx_flash_prepare(struct target_s *target, uint32_t addr, int len)
{
/* prepare the sector(s) to be erased */
memset(&flash_pgm.p, 0, sizeof(flash_pgm.p));
flash_pgm.p.command[0] = IAP_CMD_PREPARE;
flash_pgm.p.command[1] = addr / flash_page_size(target);
flash_pgm.p.command[2] = (addr + len - 1) / flash_page_size(target);
lpc11x_iap_call(target, &flash_pgm.p, sizeof(flash_pgm.p));
if (flash_pgm.p.result[0] != IAP_STATUS_CMD_SUCCESS) {
return -1;
}
return 0;
}
static int
lpc11xx_flash_erase(struct target_s *target, uint32_t addr, int len)
{
if (addr % flash_page_size(target))
return -1;
/* prepare... */
if (lpc11xx_flash_prepare(target, addr, len))
return -1;
/* and now erase them */
flash_pgm.p.command[0] = IAP_CMD_ERASE;
flash_pgm.p.command[1] = addr / flash_page_size(target);
flash_pgm.p.command[2] = (addr + len - 1) / flash_page_size(target);
flash_pgm.p.command[3] = 12000; /* XXX safe to assume this? */
lpc11x_iap_call(target, &flash_pgm.p, sizeof(flash_pgm.p));
if (flash_pgm.p.result[0] != IAP_STATUS_CMD_SUCCESS) {
return -1;
}
flash_pgm.p.command[0] = IAP_CMD_BLANKCHECK;
lpc11x_iap_call(target, &flash_pgm.p, sizeof(flash_pgm.p));
if (flash_pgm.p.result[0] != IAP_STATUS_CMD_SUCCESS) {
return -1;
}
return 0;
}
static int
lpc11xx_flash_write(struct target_s *target, uint32_t dest, const uint8_t *src, int len)
{
unsigned first_chunk = dest / IAP_PGM_CHUNKSIZE;
unsigned last_chunk = (dest + len - 1) / IAP_PGM_CHUNKSIZE;
unsigned chunk_offset = dest % IAP_PGM_CHUNKSIZE;
unsigned chunk;
for (chunk = first_chunk; chunk <= last_chunk; chunk++) {
DEBUG("chunk %u len %d\n", chunk, len);
/* first and last chunk may require special handling */
if ((chunk == first_chunk) || (chunk == last_chunk)) {
/* fill with all ff to avoid sector rewrite corrupting other writes */
memset(flash_pgm.data, 0xff, sizeof(flash_pgm.data));
/* copy as much as fits */
int copylen = IAP_PGM_CHUNKSIZE - chunk_offset;
if (copylen > len)
copylen = len;
memcpy(&flash_pgm.data[chunk_offset], src, copylen);
/* if we are programming the vectors, calculate the magic number */
if ((chunk == 0) && (chunk_offset == 0)) {
if (copylen < 32) {
/* we have to be programming at least the first 8 vectors... */
return -1;
}
uint32_t *w = (uint32_t *)(&flash_pgm.data[0]);
uint32_t sum = 0;
for (unsigned i = 0; i < 7; i++)
sum += w[i];
w[7] = ~sum + 1;
}
/* update to suit */
len -= copylen;
src += copylen;
chunk_offset = 0;
} else {
/* interior chunk, must be aligned and full-sized */
memcpy(flash_pgm.data, src, IAP_PGM_CHUNKSIZE);
len -= IAP_PGM_CHUNKSIZE;
src += IAP_PGM_CHUNKSIZE;
}
/* prepare... */
if (lpc11xx_flash_prepare(target, chunk * IAP_PGM_CHUNKSIZE, IAP_PGM_CHUNKSIZE))
return -1;
/* set the destination address and program */
flash_pgm.p.command[0] = IAP_CMD_PROGRAM;
flash_pgm.p.command[1] = chunk * IAP_PGM_CHUNKSIZE;
flash_pgm.p.command[2] = IAP_RAM_BASE + offsetof(struct flash_program, data);
flash_pgm.p.command[3] = IAP_PGM_CHUNKSIZE;
/* assuming we are running off IRC - safe lower bound */
flash_pgm.p.command[4] = 12000; /* XXX safe to presume this? */
lpc11x_iap_call(target, &flash_pgm.p, sizeof(flash_pgm));
if (flash_pgm.p.result[0] != IAP_STATUS_CMD_SUCCESS) {
return -1;
}
}
return 0;
}
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