LXR uboot/drivers/fpga/socfpga.c

   1// SPDX-License-Identifier: BSD-3-Clause
   2/*
   3 * Copyright (C) 2012-2017 Altera Corporation <www.altera.com>
   4 * All rights reserved.
   5 */
   6
   7#include <common.h>
   8#include <asm/io.h>
   9#include <linux/errno.h>
  10#include <asm/arch/fpga_manager.h>
  11#include <asm/arch/reset_manager.h>
  12#include <asm/arch/system_manager.h>
  13
  14/* Timeout count */
  15#define FPGA_TIMEOUT_CNT                0x1000000
  16
  17static struct socfpga_fpga_manager *fpgamgr_regs =
  18        (struct socfpga_fpga_manager *)SOCFPGA_FPGAMGRREGS_ADDRESS;
  19
  20int fpgamgr_dclkcnt_set(unsigned long cnt)
  21{
  22        unsigned long i;
  23
  24        /* Clear any existing done status */
  25        if (readl(&fpgamgr_regs->dclkstat))
  26                writel(0x1, &fpgamgr_regs->dclkstat);
  27
  28        /* Write the dclkcnt */
  29        writel(cnt, &fpgamgr_regs->dclkcnt);
  30
  31        /* Wait till the dclkcnt done */
  32        for (i = 0; i < FPGA_TIMEOUT_CNT; i++) {
  33                if (!readl(&fpgamgr_regs->dclkstat))
  34                        continue;
  35
  36                writel(0x1, &fpgamgr_regs->dclkstat);
  37                return 0;
  38        }
  39
  40        return -ETIMEDOUT;
  41}
  42
  43/* Write the RBF data to FPGA Manager */
  44void fpgamgr_program_write(const void *rbf_data, size_t rbf_size)
  45{
  46        uint32_t src = (uint32_t)rbf_data;
  47        uint32_t dst = SOCFPGA_FPGAMGRDATA_ADDRESS;
  48
  49        /* Number of loops for 32-byte long copying. */
  50        uint32_t loops32 = rbf_size / 32;
  51        /* Number of loops for 4-byte long copying + trailing bytes */
  52        uint32_t loops4 = DIV_ROUND_UP(rbf_size % 32, 4);
  53
  54        asm volatile(
  55                "       cmp     %2,     #0\n"
  56                "       beq     2f\n"
  57                "1:     ldmia   %0!,    {r0-r7}\n"
  58                "       stmia   %1!,    {r0-r7}\n"
  59                "       sub     %1,     #32\n"
  60                "       subs    %2,     #1\n"
  61                "       bne     1b\n"
  62                "2:     cmp     %3,     #0\n"
  63                "       beq     4f\n"
  64                "3:     ldr     %2,     [%0],   #4\n"
  65                "       str     %2,     [%1]\n"
  66                "       subs    %3,     #1\n"
  67                "       bne     3b\n"
  68                "4:     nop\n"
  69                : "+r"(src), "+r"(dst), "+r"(loops32), "+r"(loops4) :
  70                : "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "cc");
  71}
  72
  73