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d678a59d2d
When bringing in the series 'arm: dts: am62-beagleplay: Fix Beagleplay Ethernet"' I failed to notice that b4 noticed it was based on next and so took that as the base commit and merged that part of next to master. This reverts commitc8ffd1356d, reversing changes made to2ee6f3a5f7. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
75 lines
1.7 KiB
C
75 lines
1.7 KiB
C
// SPDX-License-Identifier: BSD-3-Clause
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/*
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* Copyright (C) 2012 Altera Corporation <www.altera.com>
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* All rights reserved.
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*
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* This file contains only support functions used also by the SoCFPGA
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* platform code, the real meat is located in drivers/fpga/socfpga.c .
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*/
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#include <common.h>
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#include <asm/io.h>
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#include <linux/errno.h>
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#include <asm/arch/fpga_manager.h>
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#include <asm/arch/reset_manager.h>
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#include <asm/arch/system_manager.h>
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/* Timeout count */
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#define FPGA_TIMEOUT_CNT 0x1000000
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static struct socfpga_fpga_manager *fpgamgr_regs =
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(struct socfpga_fpga_manager *)SOCFPGA_FPGAMGRREGS_ADDRESS;
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/* Check whether FPGA Init_Done signal is high */
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static int is_fpgamgr_initdone_high(void)
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{
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unsigned long val;
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val = readl(&fpgamgr_regs->gpio_ext_porta);
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return val & FPGAMGRREGS_MON_GPIO_EXT_PORTA_ID_MASK;
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}
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/* Get the FPGA mode */
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int fpgamgr_get_mode(void)
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{
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unsigned long val;
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val = readl(&fpgamgr_regs->stat);
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return val & FPGAMGRREGS_STAT_MODE_MASK;
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}
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/* Check whether FPGA is ready to be accessed */
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int fpgamgr_test_fpga_ready(void)
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{
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/* Check for init done signal */
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if (!is_fpgamgr_initdone_high())
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return 0;
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/* Check again to avoid false glitches */
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if (!is_fpgamgr_initdone_high())
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return 0;
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if (fpgamgr_get_mode() != FPGAMGRREGS_MODE_USERMODE)
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return 0;
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return 1;
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}
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/* Poll until FPGA is ready to be accessed or timeout occurred */
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int fpgamgr_poll_fpga_ready(void)
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{
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unsigned long i;
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/* If FPGA is blank, wait till WD invoke warm reset */
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for (i = 0; i < FPGA_TIMEOUT_CNT; i++) {
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/* check for init done signal */
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if (!is_fpgamgr_initdone_high())
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continue;
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/* check again to avoid false glitches */
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if (!is_fpgamgr_initdone_high())
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continue;
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return 1;
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}
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return 0;
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}
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