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Altera_Forum
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14 years ago

Issue with 16-bit CFI Flash

Hello, We use a CFI Flash with 16 bits of data width on our board (JS28F256) And we use nios2-linux (kernel version 2.6.30) to read/write on it. We know that the Linux version works well...
Altera_Forum's avatar
Altera_Forum
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14 years ago

Ok I found the solution.

In linux-2.6/arch/nios2/kernel/config.c you can find : 

static struct physmap_flash_data nios2_flash_data = {                                                                   # if defined(CONFIG_ALTERA_NEEK_C3) || defined(CONFIG_ALTERA_CYCLONE_III)                                              
   .width = 2,   /* 16 bits data bus # else                                                                                                                 
   .width = 1,   /* 8 bits data bus */                                                                                 # endif
But my config is not CONFIG_ALTERA_NEEK_C3 nor CONFIG_ALTERA_CYCLONE_III.

So I just force the width to be 2

This type of bug will not happen with the latest kernel that use device-tree, hopefully !

Best regards