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d024236e5a
We have a large number of places where while we historically referenced gd in the code we no longer do, as well as cases where the code added that line "just in case" during development and never dropped it. Signed-off-by: Tom Rini <trini@konsulko.com>
76 lines
1.7 KiB
C
76 lines
1.7 KiB
C
/*
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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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* SPDX-License-Identifier: BSD-3-Clause
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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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