contrib/loaders/flash/bluenrg-x/bluenrg-x_write.c

   1 /* To be built with arm-none-eabi-gcc -c -mthumb -mcpu=cortex-m0 -O3 bluenrgx.c */
   2 /* Then postprocess output of command "arm-none-eabi-objdump -d bluenrgx.o" to make a C array of bytes */
   3
   4 #include <stdint.h>
   5 #include "../../../../src/flash/nor/bluenrg-x.h"
   6
   7 /* Status Values ----------------------------------------------------------*/
   8 #define SUCCESS             0
   9 #define ERR_UNALIGNED       1
  10 #define ERR_INVALID_ADDRESS 2
  11 #define ERR_INVALID_TYPE    3
  12 #define ERR_WRITE_PROTECTED 4
  13 #define ERR_WRITE_FAILED    5
  14 #define ERR_ERASE_REQUIRED  6
  15 #define ERR_VERIFY_FAILED   7
  16
  17 #define MFB_MASS_ERASE 0x01
  18 #define MFB_PAGE_ERASE 0x02
  19
  20 #define DO_ERASE  0x0100
  21 #define DO_VERIFY 0x0200
  22
  23 #define MFB_BOTTOM                (0x10040000)
  24 #define MFB_SIZE_B(regs_base)     ((16 * (((*(volatile uint32_t *)(regs_base + FLASH_SIZE_REG)) + 1) >> 12)) * 1024)
  25 #define MFB_SIZE_W                (MFB_SIZE_B/4)
  26 #define MFB_TOP                   (MFB_BOTTOM+MFB_SIZE_B-1)
  27 #define MFB_PAGE_SIZE_B           (2048)
  28 #define MFB_PAGE_SIZE_W           (MFB_PAGE_SIZE_B/4)
  29
  30 #define AREA_ERROR 0x01
  31 #define AREA_MFB   0x04
  32
  33 typedef struct {
  34         volatile uint8_t *wp;
  35         uint8_t *rp;
  36 } work_area_t;
  37
  38 /* Flash Commands --------------------------------------------------------*/
  39 static inline __attribute__((always_inline)) uint32_t flashWrite(uint32_t address, uint8_t **data,
  40                                                                  uint32_t writeLength, uint32_t flash_regs_base)
  41 {
  42         uint32_t index, flash_word[4];
  43         uint8_t i;
  44
  45         *((volatile uint32_t *)(flash_regs_base + FLASH_REG_IRQMASK)) = 0;
  46         for (index = 0; index < writeLength; index += (FLASH_WORD_LEN*4)) {
  47                 for (i = 0; i < 4; i++)
  48                         flash_word[i] = (*(uint32_t *) (*data + i*4));
  49
  50                 /* Clear the IRQ flags */
  51                 *((volatile uint32_t *)(flash_regs_base + FLASH_REG_IRQRAW)) = 0x0000003F;
  52                 /* Load the flash address to write */
  53                 *((volatile uint32_t *)(flash_regs_base + FLASH_REG_ADDRESS)) = (uint16_t)((address + index - MFB_BOTTOM) >> 2);
  54                 /* Prepare and load the data to flash */
  55                 *((volatile uint32_t *)(flash_regs_base + FLASH_REG_DATA0)) = flash_word[0];
  56                 *((volatile uint32_t *)(flash_regs_base + FLASH_REG_DATA1)) = flash_word[1];
  57                 *((volatile uint32_t *)(flash_regs_base + FLASH_REG_DATA2)) = flash_word[2];
  58                 *((volatile uint32_t *)(flash_regs_base + FLASH_REG_DATA3)) = flash_word[3];
  59                 /* Flash write command */
  60                 *((volatile uint32_t *)(flash_regs_base + FLASH_REG_COMMAND)) = FLASH_CMD_BURSTWRITE;
  61                 /* Wait the end of the flash write command */
  62                 while ((*((volatile uint32_t *)(flash_regs_base + FLASH_REG_IRQRAW)) & FLASH_INT_CMDDONE) == 0)
  63                         ;
  64                 *data += (FLASH_WORD_LEN * 4);
  65         }
  66
  67         return SUCCESS;
  68 }
  69
  70 __attribute__((naked)) __attribute__((noreturn)) void write(uint8_t *work_area_p,
  71                                                             uint8_t *fifo_end,
  72                                                             uint8_t *target_address,
  73                                                             uint32_t count,
  74                                                             uint32_t flash_regs_base)
  75 {
  76         uint32_t retval;
  77         volatile work_area_t *work_area = (work_area_t *) work_area_p;
  78         uint8_t *fifo_start = (uint8_t *) work_area->rp;
  79
  80         while (count) {
  81                 volatile int32_t fifo_linear_size;
  82
  83                 /* Wait for some data in the FIFO */
  84                 while (work_area->rp == work_area->wp)
  85                         ;
  86                 if (work_area->wp == 0) {
  87                         /* Aborted by other party */
  88                         break;
  89                 }
  90                 if (work_area->rp > work_area->wp) {
  91                         fifo_linear_size = fifo_end-work_area->rp;
  92                 } else {
  93                         fifo_linear_size = (work_area->wp - work_area->rp);
  94                         if (fifo_linear_size < 0)
  95                                 fifo_linear_size = 0;
  96                 }
  97                 if (fifo_linear_size < 16) {
  98                         /* We should never get here */
  99                         continue;
 100                 }
 101
 102                 retval = flashWrite((uint32_t) target_address, (uint8_t **) &work_area->rp, fifo_linear_size, flash_regs_base);
 103                 if (retval != SUCCESS) {
 104                         work_area->rp = (uint8_t *)retval;
 105                         break;
 106                 }
 107                 target_address += fifo_linear_size;
 108                 if (work_area->rp >= fifo_end)
 109                         work_area->rp = fifo_start;
 110                 count -= fifo_linear_size;
 111         }
 112         __asm("bkpt 0");
 113 }