mirrors/u-boot
0
0
Fork 0
mirror of https://github.com/u-boot/u-boot.git synced 2025-01-07 19:23:25 +08:00
Code Issues Packages Projects Releases Wiki Activity

arm: socfpga: reset: Add function to reset FPGA bridges

Browse Source 
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>
This commit is contained in:
Marek Vasut 2014-09-08 14:08:45 +02:00
parent 230fe9b202
commit abb25f4e95
2 changed files with 40 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

38
arch/arm/cpu/armv7/socfpga/reset_manager.c
View File

@ -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)
{

2
arch/arm/include/asm/arch-socfpga/reset_manager.h
View File

@ -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);