Hi!
With u-boot command interface I finally got the burst mode of my intel 28F128K3 device running. Initializing is in three steps:
Tell Flash it should "bursting", write 7F84 into RCR register:
mm.w 0x00007F84 <- 0x60
Then Chipselect 0 is informed:
mm 0x220000 <- 0x00510800
Finally send ACK Command to Flash in burst mode:
mm.w 0x00007F84 <- 0x03
Thats it. Or, in assembler it _should_ look like:
/* initialize burst mode */ ldr r0, =FLASH_ADDRESS ldr r1, =FLASH_RCR_CMD str r1, [r0]
ldr r0, =CS0U ldr r1, =CFG_CS0U_B_VAL str r1, [r0]
ldr r0, =FLASH_ADDRESS ldr r1, =FLASH_ACK_CMD str r1, [r0] /* end initializing burst mode */
To experiment with different timings and word burst sizes I would like to implement the code into the u-boot code. But where do I should put it? I use Motorola ARM9 i.MX CPU on scb9328 board. If I understood right, 1st memsetup.S is executed, after that the relocation starts. My reading of the code is vice versa sequence, I am confused now...
Konsti