Add function to enable and disable FPGA bridges. This code is used by the FPGA manager to disable the bridges before programming the FPGA and will later be also used by the initialization code for the chip to put the chip into well defined state during startup.
Signed-off-by: Marek Vasut marex@denx.de Cc: Chin Liang See clsee@altera.com Cc: Dinh Nguyen dinguyen@altera.com Cc: Albert Aribaud albert.u.boot@aribaud.net Cc: Tom Rini trini@ti.com Cc: Wolfgang Denk wd@denx.de Cc: Pavel Machek pavel@denx.de Acked-by: Pavel Machek pavel@denx.de --- arch/arm/cpu/armv7/socfpga/reset_manager.c | 38 +++++++++++++++++++++++ arch/arm/include/asm/arch-socfpga/reset_manager.h | 2 ++ 2 files changed, 40 insertions(+)
diff --git a/arch/arm/cpu/armv7/socfpga/reset_manager.c b/arch/arm/cpu/armv7/socfpga/reset_manager.c index badc569..1d3a95d 100644 --- a/arch/arm/cpu/armv7/socfpga/reset_manager.c +++ b/arch/arm/cpu/armv7/socfpga/reset_manager.c @@ -8,6 +8,7 @@ #include <common.h> #include <asm/io.h> #include <asm/arch/reset_manager.h> +#include <asm/arch/fpga_manager.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -50,6 +51,43 @@ void reset_deassert_peripherals_handoff(void) writel(0, &reset_manager_base->per_mod_reset); }
+#if defined(CONFIG_SOCFPGA_VIRTUAL_TARGET) +void socfpga_bridges_reset(int enable) +{ + /* For SoCFPGA-VT, this is NOP. */ +} +#else + +#define L3REGS_REMAP_LWHPS2FPGA_MASK 0x10 +#define L3REGS_REMAP_HPS2FPGA_MASK 0x08 +#define L3REGS_REMAP_OCRAM_MASK 0x01 + +void socfpga_bridges_reset(int enable) +{ + const uint32_t l3mask = L3REGS_REMAP_LWHPS2FPGA_MASK | + L3REGS_REMAP_HPS2FPGA_MASK | + L3REGS_REMAP_OCRAM_MASK; + + if (enable) { + /* brdmodrst */ + writel(0xffffffff, &reset_manager_base->brg_mod_reset); + } else { + /* Check signal from FPGA. */ + if (fpgamgr_poll_fpga_ready()) { + /* FPGA not ready. Wait for watchdog timeout. */ + printf("%s: fpga not ready, hanging.\n", __func__); + hang(); + } + + /* brdmodrst */ + writel(0, &reset_manager_base->brg_mod_reset); + + /* Remap the bridges into memory map */ + writel(l3mask, SOCFPGA_L3REGS_ADDRESS); + } +} +#endif + /* Change the reset state for EMAC 0 and EMAC 1 */ void socfpga_emac_reset(int enable) { diff --git a/arch/arm/include/asm/arch-socfpga/reset_manager.h b/arch/arm/include/asm/arch-socfpga/reset_manager.h index 3c5ab40..1857b80 100644 --- a/arch/arm/include/asm/arch-socfpga/reset_manager.h +++ b/arch/arm/include/asm/arch-socfpga/reset_manager.h @@ -10,6 +10,8 @@ void reset_cpu(ulong addr); void reset_deassert_peripherals_handoff(void);
+void socfpga_bridges_reset(int enable); + void socfpga_emac_reset(int enable); void socfpga_watchdog_reset(void);