davinci: spl: use bootcfg to select boot device
Right now the SPL is trying to load u-boot based on defines, i.e. one
has to define CONFIG_SPL_NAND_SIMPLE to boot from NAND,
or CONFIG_SPL_SPI_LOAD to boot from SPI FLASH, etc...
This prevent us from having a single SPL image that is able to boot from
all media, and one need to build an image for each medium. This
commit is replacing the #ifdef that select the boot medium by reading
the value of the boot pins (via the BOOTCFG register).
Now a single SPL image will be able to read from the boot pin to know
which device should be used to load u-boot.
Signed-off-by: Fabien Parent <fparent@baylibre.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/mach-davinci/include/mach/hardware.h b/arch/arm/mach-davinci/include/mach/hardware.h
index 2a0360a..c31f38c 100644
--- a/arch/arm/mach-davinci/include/mach/hardware.h
+++ b/arch/arm/mach-davinci/include/mach/hardware.h
@@ -475,12 +475,15 @@
/* Boot config */
struct davinci_syscfg_regs {
dv_reg revid;
- dv_reg rsvd[13];
+ dv_reg rsvd[7];
+ dv_reg bootcfg;
+ dv_reg chiprevidr;
+ dv_reg rsvd2[4];
dv_reg kick0;
dv_reg kick1;
dv_reg rsvd1[52];
dv_reg mstpri[3];
- dv_reg rsvd2;
+ dv_reg rsvd3;
dv_reg pinmux[20];
dv_reg suspsrc;
dv_reg chipsig;
@@ -495,6 +498,15 @@
#define davinci_syscfg_regs \
((struct davinci_syscfg_regs *)DAVINCI_BOOTCFG_BASE)
+enum {
+ DAVINCI_NAND8_BOOT = 0b001110,
+ DAVINCI_NAND16_BOOT = 0b010000,
+ DAVINCI_SD_OR_MMC_BOOT = 0b011100,
+ DAVINCI_MMC_ONLY_BOOT = 0b111100,
+ DAVINCI_SPI0_FLASH_BOOT = 0b001010,
+ DAVINCI_SPI1_FLASH_BOOT = 0b001100,
+};
+
#define pinmux(x) (&davinci_syscfg_regs->pinmux[x])
/* Emulation suspend bits */
diff --git a/arch/arm/mach-davinci/spl.c b/arch/arm/mach-davinci/spl.c
index 0aeaa7d..564c200 100644
--- a/arch/arm/mach-davinci/spl.c
+++ b/arch/arm/mach-davinci/spl.c
@@ -52,14 +52,27 @@
u32 spl_boot_device(void)
{
-#ifdef CONFIG_SPL_NAND_SIMPLE
- return BOOT_DEVICE_NAND;
-#elif defined(CONFIG_SPL_SPI_LOAD)
- return BOOT_DEVICE_SPI;
-#elif defined(CONFIG_SPL_MMC_LOAD)
- return BOOT_DEVICE_MMC1;
-#else
- puts("Unknown boot device\n");
- hang();
+ switch (davinci_syscfg_regs->bootcfg) {
+#ifdef CONFIG_SPL_NAND_SUPPORT
+ case DAVINCI_NAND8_BOOT:
+ case DAVINCI_NAND16_BOOT:
+ return BOOT_DEVICE_NAND;
+#endif
+
+#ifdef CONFIG_SPL_MMC_SUPPORT
+ case DAVINCI_SD_OR_MMC_BOOT:
+ case DAVINCI_MMC_ONLY_BOOT:
+ return BOOT_DEVICE_MMC1;
+#endif
+
+#ifdef CONFIG_SPL_SPI_FLASH_SUPPORT
+ case DAVINCI_SPI0_FLASH_BOOT:
+ case DAVINCI_SPI1_FLASH_BOOT:
+ return BOOT_DEVICE_SPI;
#endif
+
+ default:
+ puts("Unknown boot device\n");
+ hang();
+ }
}