diff options
author | Ley Foon Tan <ley.foon.tan@intel.com> | 2017-04-26 02:44:34 +0800 |
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committer | Marek Vasut <marex@denx.de> | 2017-05-18 11:33:17 +0200 |
commit | 2b09ea48ddd6ea645cc437fad5ce832b8227f53e (patch) | |
tree | c6ad14591b6619dd0e8abb30af87e67437339157 /arch/arm/mach-socfpga/reset_manager_gen5.c | |
parent | de7781158923a9c87debc5a89ce4fabfd0fc93bc (diff) |
arm: socfpga: Restructure reset manager driver
Restructure reset manager driver in the preparation to support A10.
Move the Gen5 specific code to gen5 files.
Signed-off-by: Ley Foon Tan <ley.foon.tan@intel.com>
Diffstat (limited to 'arch/arm/mach-socfpga/reset_manager_gen5.c')
-rw-r--r-- | arch/arm/mach-socfpga/reset_manager_gen5.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/arch/arm/mach-socfpga/reset_manager_gen5.c b/arch/arm/mach-socfpga/reset_manager_gen5.c new file mode 100644 index 0000000000..aa88adb414 --- /dev/null +++ b/arch/arm/mach-socfpga/reset_manager_gen5.c @@ -0,0 +1,116 @@ +/* + * Copyright (C) 2013 Altera Corporation <www.altera.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + + +#include <common.h> +#include <asm/io.h> +#include <asm/arch/fpga_manager.h> +#include <asm/arch/reset_manager.h> +#include <asm/arch/system_manager.h> + +DECLARE_GLOBAL_DATA_PTR; + +static const struct socfpga_reset_manager *reset_manager_base = + (void *)SOCFPGA_RSTMGR_ADDRESS; +static const struct socfpga_system_manager *sysmgr_regs = + (struct socfpga_system_manager *)SOCFPGA_SYSMGR_ADDRESS; + +/* Assert or de-assert SoCFPGA reset manager reset. */ +void socfpga_per_reset(u32 reset, int set) +{ + const u32 *reg; + u32 rstmgr_bank = RSTMGR_BANK(reset); + + switch (rstmgr_bank) { + case 0: + reg = &reset_manager_base->mpu_mod_reset; + break; + case 1: + reg = &reset_manager_base->per_mod_reset; + break; + case 2: + reg = &reset_manager_base->per2_mod_reset; + break; + case 3: + reg = &reset_manager_base->brg_mod_reset; + break; + case 4: + reg = &reset_manager_base->misc_mod_reset; + break; + + default: + return; + } + + if (set) + setbits_le32(reg, 1 << RSTMGR_RESET(reset)); + else + clrbits_le32(reg, 1 << RSTMGR_RESET(reset)); +} + +/* + * Assert reset on every peripheral but L4WD0. + * Watchdog must be kept intact to prevent glitches + * and/or hangs. + */ +void socfpga_per_reset_all(void) +{ + const u32 l4wd0 = 1 << RSTMGR_RESET(SOCFPGA_RESET(L4WD0)); + + writel(~l4wd0, &reset_manager_base->per_mod_reset); + writel(0xffffffff, &reset_manager_base->per2_mod_reset); +} + +/* + * Release peripherals from reset based on handoff + */ +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. */ + return; +} +#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 u32 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 { + writel(0, &sysmgr_regs->iswgrp_handoff[0]); + writel(l3mask, &sysmgr_regs->iswgrp_handoff[1]); + + /* Check signal from FPGA. */ + if (!fpgamgr_test_fpga_ready()) { + /* FPGA not ready, do nothing. We allow system to boot + * without FPGA ready. So, return 0 instead of error. */ + printf("%s: FPGA not ready, aborting.\n", __func__); + return; + } + + /* brdmodrst */ + writel(0, &reset_manager_base->brg_mod_reset); + + /* Remap the bridges into memory map */ + writel(l3mask, SOCFPGA_L3REGS_ADDRESS); + } + return; +} +#endif |