include/asm-blackfin/config-pre.h

   1 /*
   2  * config-pre.h - common defines for Blackfin boards in config.h
   3  *
   4  * Copyright (c) 2007-2009 Analog Devices Inc.
   5  *
   6  * Licensed under the GPL-2 or later.
   7  */
   8
   9 #ifndef __ASM_BLACKFIN_CONFIG_PRE_H__
  10 #define __ASM_BLACKFIN_CONFIG_PRE_H__
  11
  12 /* Misc helper functions */
  13 #define XMK_STR(x) #x
  14 #define MK_STR(x) XMK_STR(x)
  15 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
  16
  17 /* Bootmode defines -- your config needs to select this via CONFIG_BFIN_BOOT_MODE.
  18  * Depending on your cpu, some of these may not be valid, check your HRM.
  19  * The actual values here are meaningless as long as they're unique.
  20  */
  21 #define BFIN_BOOT_BYPASS      1       /* bypass bootrom */
  22 #define BFIN_BOOT_PARA        2       /* boot ldr out of parallel flash */
  23 #define BFIN_BOOT_SPI_MASTER  3       /* boot ldr out of serial flash */
  24 #define BFIN_BOOT_SPI_SLAVE   4       /* boot ldr as spi slave */
  25 #define BFIN_BOOT_TWI_MASTER  5       /* boot ldr over twi device */
  26 #define BFIN_BOOT_TWI_SLAVE   6       /* boot ldr over twi slave */
  27 #define BFIN_BOOT_UART        7       /* boot ldr over uart */
  28 #define BFIN_BOOT_IDLE        8       /* do nothing, just idle */
  29 #define BFIN_BOOT_FIFO        9       /* boot ldr out of FIFO */
  30 #define BFIN_BOOT_MEM         10      /* boot ldr out of memory (warmboot) */
  31 #define BFIN_BOOT_16HOST_DMA  11      /* boot ldr from 16-bit host dma */
  32 #define BFIN_BOOT_8HOST_DMA   12      /* boot ldr from 8-bit host dma */
  33 #define BFIN_BOOT_NAND        13      /* boot ldr from nand flash */
  34
  35 #ifndef __ASSEMBLY__
  36 static inline const char *get_bfin_boot_mode(int bfin_boot)
  37 {
  38         switch (bfin_boot) {
  39         case BFIN_BOOT_BYPASS:     return "bypass";
  40         case BFIN_BOOT_PARA:       return "parallel flash";
  41         case BFIN_BOOT_SPI_MASTER: return "spi flash";
  42         case BFIN_BOOT_SPI_SLAVE:  return "spi slave";
  43         case BFIN_BOOT_TWI_MASTER: return "i2c flash";
  44         case BFIN_BOOT_TWI_SLAVE:  return "i2c slave";
  45         case BFIN_BOOT_UART:       return "uart";
  46         case BFIN_BOOT_IDLE:       return "idle";
  47         case BFIN_BOOT_FIFO:       return "fifo";
  48         case BFIN_BOOT_MEM:        return "memory";
  49         case BFIN_BOOT_16HOST_DMA: return "16bit dma";
  50         case BFIN_BOOT_8HOST_DMA:  return "8bit dma";
  51         case BFIN_BOOT_NAND:       return "nand flash";
  52         default:                   return "INVALID";
  53         }
  54 }
  55 #endif
  56
  57 /* Most bootroms allow for EVT1 redirection */
  58 #if ((defined(__ADSPBF531__) || defined(__ADSPBF532__) || defined(__ADSPBF533__)) \
  59      && __SILICON_REVISION__ < 3) || defined(__ADSPBF561__)
  60 # undef CONFIG_BFIN_BOOTROM_USES_EVT1
  61 #else
  62 # define CONFIG_BFIN_BOOTROM_USES_EVT1
  63 #endif
  64
  65 /* Define the default SPI CS used when booting out of SPI */
  66 #if defined(__ADSPBF531__) || defined(__ADSPBF532__) || defined(__ADSPBF533__) || \
  67     defined(__ADSPBF538__) || defined(__ADSPBF539__) || defined(__ADSPBF561__) || \
  68     defined(__ADSPBF51x__)
  69 # define BFIN_BOOT_SPI_SSEL 2
  70 #else
  71 # define BFIN_BOOT_SPI_SSEL 1
  72 #endif
  73
  74 /* There is no Blackfin/NetBSD port */
  75 #undef CONFIG_BOOTM_NETBSD
  76
  77 /* We rarely use interrupts, so favor throughput over latency */
  78 #define CONFIG_BFIN_INS_LOWOVERHEAD
  79
  80 #endif