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-rw-r--r--src/nxp_tgt.c255
1 files changed, 255 insertions, 0 deletions
diff --git a/src/nxp_tgt.c b/src/nxp_tgt.c
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--- /dev/null
+++ b/src/nxp_tgt.c
@@ -0,0 +1,255 @@
+
+#include <stdlib.h>
+#include <string.h>
+#include <stddef.h>
+
+#include "general.h"
+#include "adiv5.h"
+#include "target.h"
+#include "nxp_tgt.h"
+
+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 */
+};
+
+#define IAP_PGM_CHUNKSIZE 256 /* should fit in RAM on any device */
+
+struct flash_program {
+ struct flash_param p;
+ uint8_t data[IAP_PGM_CHUNKSIZE];
+};
+
+#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 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_words(struct target_s *target, uint32_t dest, const uint32_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=\"0x8000\">"
+ " <property name=\"blocksize\">0x1000</property>"
+ " </memory>"
+ " <memory type=\"ram\" start=\"0x10000000\" length=\"0x2000\"/>"
+ "</memory-map>";
+
+
+int
+lpc11xx_probe(struct target_s *target)
+{
+ struct target_ap_s *t = (void *)target;
+ uint32_t idcode;
+
+ /* read the device ID register */
+ idcode = adiv5_ap_mem_read(t->ap, 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 0x1431102B: /* lpc11c22 */
+ case 0x1430102B: /* lpc11c24 */
+ target->driver = "lpc11xx";
+ target->xml_mem_map = lpc11xx_xml_memory_map;
+ target->flash_erase = lpc11xx_flash_erase;
+ target->flash_write_words = lpc11xx_flash_write_words;
+
+ return 0;
+
+ default:
+ break;
+ }
+
+ return -1;
+}
+
+static void
+lpc11x_iap_call(struct target_s *target, struct flash_param *param, unsigned param_len)
+{
+ uint32_t regs[target->regs_size];
+
+ /* 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);
+
+ 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
+lpc11xx_flash_prepare(struct target_s *target, uint32_t addr, int len)
+{
+ struct flash_param p;
+
+ /* prepare the sector(s) to be erased */
+ memset(&p, 0, sizeof(p));
+ p.command[0] = IAP_CMD_PREPARE;
+ p.command[1] = addr / 4096;
+ p.command[2] = p.command[1] + ((len + 4095) / 4096) - 1;
+
+ lpc11x_iap_call(target, &p, sizeof(p));
+ if (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)
+{
+ struct flash_param p;
+
+ if (addr % 4096)
+ return -1;
+
+ /* prepare... */
+ if (lpc11xx_flash_prepare(target, addr, len))
+ return -1;
+
+ /* and now erase them */
+ p.command[0] = IAP_CMD_ERASE;
+ p.command[1] = addr / 4096;
+ p.command[2] = p.command[1] + ((len + 4095) / 4096) - 1;
+ p.command[3] = 12000; /* XXX safe to assume this? */
+ lpc11x_iap_call(target, &p, sizeof(p));
+ if (p.result[0] != IAP_STATUS_CMD_SUCCESS) {
+ return -1;
+ }
+ p.command[0] = IAP_CMD_BLANKCHECK;
+ lpc11x_iap_call(target, &p, sizeof(p));
+ if (p.result[0] != IAP_STATUS_CMD_SUCCESS) {
+ return -1;
+ }
+
+ return 0;
+}
+
+static int
+lpc11xx_flash_write_words(struct target_s *target, uint32_t dest, const uint32_t *src, int len)
+{
+ struct flash_program pgm;
+ const uint8_t *s = (const uint8_t *)src;
+ 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++) {
+
+ printf("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(pgm.data, 0xff, sizeof(pgm.data));
+
+ /* copy as much as fits */
+ int copylen = IAP_PGM_CHUNKSIZE - chunk_offset;
+ if (copylen > len)
+ copylen = len;
+ memcpy(&pgm.data[chunk_offset], s, copylen);
+
+ /* update to suit */
+ len -= copylen;
+ s += copylen;
+ chunk_offset = 0;
+
+ /* if we are programming the vectors, calculate the magic number */
+ if (chunk == 0) {
+ uint32_t *w = (uint32_t *)(&pgm.data[0]);
+ uint32_t sum = 0;
+
+ for (unsigned i = 0; i < 7; i++)
+ sum += w[i];
+ w[7] = 0 - sum;
+ }
+
+ } else {
+
+ /* interior chunk, must be aligned and full-sized */
+ memcpy(pgm.data, s, IAP_PGM_CHUNKSIZE);
+ len -= IAP_PGM_CHUNKSIZE;
+ s += IAP_PGM_CHUNKSIZE;
+ }
+
+ /* prepare... */
+ if (lpc11xx_flash_prepare(target, chunk * IAP_PGM_CHUNKSIZE, IAP_PGM_CHUNKSIZE))
+ return -1;
+
+ /* set the destination address and program */
+ pgm.p.command[0] = IAP_CMD_PROGRAM;
+ pgm.p.command[1] = chunk * IAP_PGM_CHUNKSIZE;
+ pgm.p.command[2] = IAP_RAM_BASE + offsetof(struct flash_program, data);
+ pgm.p.command[3] = IAP_PGM_CHUNKSIZE;
+ pgm.p.command[4] = 12000; /* XXX safe to presume this? */
+ lpc11x_iap_call(target, &pgm.p, sizeof(pgm));
+ if (pgm.p.result[0] != IAP_STATUS_CMD_SUCCESS) {
+ return -1;
+ }
+
+ }
+
+ return 0;
+}