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
   6 /* Status Values ----------------------------------------------------------*/
   7 #define SUCCESS             0
   8 #define ERR_UNALIGNED       1
   9 #define ERR_INVALID_ADDRESS 2
  10 #define ERR_INVALID_TYPE    3
  11 #define ERR_WRITE_PROTECTED 4
  12 #define ERR_WRITE_FAILED    5
  13 #define ERR_ERASE_REQUIRED  6
  14 #define ERR_VERIFY_FAILED   7
  15
  16 /* Flash Controller defines ---------------------------------------------------*/
  17 #define FLASH_REG_COMMAND ((volatile uint32_t *)0x40100000)
  18 #define FLASH_REG_CONFIG  ((volatile uint32_t *)0x40100004)
  19 #define FLASH_REG_IRQSTAT ((volatile uint32_t *)0x40100008)
  20 #define FLASH_REG_IRQMASK ((volatile uint32_t *)0x4010000C)
  21 #define FLASH_REG_IRQRAW  ((volatile uint32_t *)0x40100010)
  22 #define FLASH_REG_ADDRESS ((volatile uint32_t *)0x40100018)
  23 #define FLASH_REG_UNLOCKM ((volatile uint32_t *)0x4010001C)
  24 #define FLASH_REG_UNLOCKL ((volatile uint32_t *)0x40100020)
  25 #define FLASH_REG_DATA0    ((volatile uint32_t *)0x40100040)
  26 #define FLASH_REG_DATA1    ((volatile uint32_t *)0x40100044)
  27 #define FLASH_REG_DATA2    ((volatile uint32_t *)0x40100048)
  28 #define FLASH_REG_DATA3    ((volatile uint32_t *)0x4010004C)
  29 #define FLASH_SIZE_REG 0x40100014
  30
  31 #define MFB_MASS_ERASE 0x01
  32 #define MFB_PAGE_ERASE 0x02
  33
  34 #define DO_ERASE  0x0100
  35 #define DO_VERIFY 0x0200
  36 #define FLASH_CMD_ERASE_PAGE 0x11
  37 #define FLASH_CMD_MASSERASE  0x22
  38 #define FLASH_CMD_WRITE      0x33
  39 #define FLASH_CMD_BURSTWRITE 0xCC
  40 #define FLASH_INT_CMDDONE    0x01
  41 #define MFB_BOTTOM          (0x10040000)
  42 #define MFB_SIZE_B          ((16 * (((*(uint32_t *) FLASH_SIZE_REG) + 1) >> 12)) * 1024)
  43 #define MFB_SIZE_W          (MFB_SIZE_B/4)
  44 #define MFB_TOP             (MFB_BOTTOM+MFB_SIZE_B-1)
  45 #define MFB_PAGE_SIZE_B     (2048)
  46 #define MFB_PAGE_SIZE_W     (MFB_PAGE_SIZE_B/4)
  47
  48 #define AREA_ERROR 0x01
  49 #define AREA_MFB   0x04
  50
  51 #define FLASH_WORD_LEN       4
  52
  53 typedef struct {
  54         volatile uint8_t *wp;
  55         uint8_t *rp;
  56 } work_area_t;
  57
  58 /* Flash Commands --------------------------------------------------------*/
  59 static inline __attribute__((always_inline)) uint32_t flashWrite(uint32_t address, uint8_t **data,
  60                                                                  uint32_t writeLength)
  61 {
  62         uint32_t index, flash_word[4];
  63         uint8_t i;
  64
  65         *FLASH_REG_IRQMASK = 0;
  66         for (index = 0; index < writeLength; index += (FLASH_WORD_LEN*4)) {
  67                 for (i = 0; i < 4; i++)
  68                         flash_word[i] = (*(uint32_t *) (*data + i*4));
  69
  70                 /* Clear the IRQ flags */
  71                 *FLASH_REG_IRQRAW = 0x0000003F;
  72                 /* Load the flash address to write */
  73                 *FLASH_REG_ADDRESS = (uint16_t)((address + index) >> 2);
  74                 /* Prepare and load the data to flash */
  75                 *FLASH_REG_DATA0 = flash_word[0];
  76                 *FLASH_REG_DATA1 = flash_word[1];
  77                 *FLASH_REG_DATA2 = flash_word[2];
  78                 *FLASH_REG_DATA3 = flash_word[3];
  79                 /* Flash write command */
  80                 *FLASH_REG_COMMAND = FLASH_CMD_BURSTWRITE;
  81                 /* Wait the end of the flash write command */
  82                 while ((*FLASH_REG_IRQRAW & FLASH_INT_CMDDONE) == 0)
  83                         ;
  84                 *data += (FLASH_WORD_LEN * 4);
  85         }
  86
  87         return SUCCESS;
  88 }
  89
  90 __attribute__((naked)) __attribute__((noreturn)) void write(uint8_t *work_area_p,
  91                                                             uint8_t *fifo_end,
  92                                                             uint8_t *target_address,
  93                                                             uint32_t count)
  94 {
  95         uint32_t retval;
  96         volatile work_area_t *work_area = (work_area_t *) work_area_p;
  97         uint8_t *fifo_start = (uint8_t *) work_area->rp;
  98
  99         while (count) {
 100                 volatile int32_t fifo_linear_size;
 101
 102                 /* Wait for some data in the FIFO */
 103                 while (work_area->rp == work_area->wp)
 104                         ;
 105                 if (work_area->wp == 0) {
 106                         /* Aborted by other party */
 107                         break;
 108                 }
 109                 if (work_area->rp > work_area->wp) {
 110                         fifo_linear_size = fifo_end-work_area->rp;
 111                 } else {
 112                         fifo_linear_size = (work_area->wp - work_area->rp);
 113                         if (fifo_linear_size < 0)
 114                                 fifo_linear_size = 0;
 115                 }
 116                 if (fifo_linear_size < 16) {
 117                         /* We should never get here */
 118                         continue;
 119                 }
 120
 121                 retval = flashWrite((uint32_t) target_address, (uint8_t **) &work_area->rp, fifo_linear_size);
 122                 if (retval != SUCCESS) {
 123                         work_area->rp = (uint8_t *)retval;
 124                         break;
 125                 }
 126                 target_address += fifo_linear_size;
 127                 if (work_area->rp >= fifo_end)
 128                         work_area->rp = fifo_start;
 129                 count -= fifo_linear_size;
 130         }
 131         __asm("bkpt 0");
 132 }