[U-Boot] [PATCH 029/172] arm: socfpga: spl: Add support for selecting boot device from BSEL

Marek Vasut
2015-07-27T20:49:52Z

Rework spl_boot_device() such that it reads the BSEL settings from
system manager and decides from where to load U-Boot based on this
information.

Signed-off-by: Marek Vasut <marex@denx.de>
---
arch/arm/mach-socfpga/spl.c | 35 +++++++++++++++++++++++------------
1 file changed, 23 insertions(+), 12 deletions(-)

diff --git a/arch/arm/mach-socfpga/spl.c b/arch/arm/mach-socfpga/spl.c
index 7f0ebeb..82570f8 100644
--- a/arch/arm/mach-socfpga/spl.c
+++ b/arch/arm/mach-socfpga/spl.c
@@ -28,19 +28,32 @@ static struct scu_registers *scu_regs =
(struct scu_registers *)SOCFPGA_MPUSCU_ADDRESS;
static struct nic301_registers *nic301_regs =
(struct nic301_registers *)SOCFPGA_L3REGS_ADDRESS;
+static struct socfpga_system_manager *sysmgr_regs =
+ (struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS;

u32 spl_boot_device(void)
{
-#ifdef CONFIG_SPL_SPI_SUPPORT
- socfpga_per_reset(SOCFPGA_RESET(QSPI), 0);
- return BOOT_DEVICE_SPI;
-#elif CONFIG_SPL_MMC_SUPPORT
- socfpga_per_reset(SOCFPGA_RESET(SDMMC), 0);
- socfpga_per_reset(SOCFPGA_RESET(DMA), 0);
- return BOOT_DEVICE_MMC1;
-#else
- return BOOT_DEVICE_RAM;
-#endif
+ const u32 bsel = readl(&sysmgr_regs->bootinfo);
+
+ switch (bsel & 0x7) {
+ case 0x1: /* FPGA (HPS2FPGA Bridge) */
+ return BOOT_DEVICE_RAM;
+ case 0x2: /* NAND Flash (1.8V) */
+ case 0x3: /* NAND Flash (3.0V) */
+ return BOOT_DEVICE_NAND;
+ case 0x4: /* SD/MMC External Transceiver (1.8V) */
+ case 0x5: /* SD/MMC Internal Transceiver (3.0V) */
+ socfpga_per_reset(SOCFPGA_RESET(SDMMC), 0);
+ socfpga_per_reset(SOCFPGA_RESET(DMA), 0);
+ return BOOT_DEVICE_MMC1;
+ case 0x6: /* QSPI Flash (1.8V) */
+ case 0x7: /* QSPI Flash (3.0V) */
+ socfpga_per_reset(SOCFPGA_RESET(QSPI), 0);
+ return BOOT_DEVICE_SPI;
+ default:
+ printf("Invalid boot device (bsel=%08x)!\n", bsel);
+ hang();
+ }
}

#ifdef CONFIG_SPL_MMC_SUPPORT
@@ -69,8 +82,6 @@ void board_init_f(ulong dummy)
#ifndef CONFIG_SOCFPGA_VIRTUAL_TARGET
const struct cm_config *cm_default_cfg = cm_get_default_config();
#endif
- struct socfpga_system_manager *sysmgr_regs =
- (struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS;
unsigned long sdram_size;
unsigned long reg;

--
2.1.4