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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 commit c8ffd1356d42223cbb8c86280a083cc3c93e6426, reversing changes made to 2ee6f3a5f7550de3599faef9704e166e5dcace35. Reported-by: Jonas Karlman <jonas@kwiboo.se> Signed-off-by: Tom Rini <trini@konsulko.com>
139 lines
3.2 KiB
C
139 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2020-2021 Intel Corporation <www.intel.com>
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*
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*/
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#include <asm/arch/handoff_soc64.h>
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#include <asm/io.h>
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#include <common.h>
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#include <errno.h>
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#include "log.h"
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#ifndef __ASSEMBLY__
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enum endianness {
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LITTLE_ENDIAN = 0,
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BIG_ENDIAN,
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UNKNOWN_ENDIANNESS
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};
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#endif
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static enum endianness check_endianness(u32 handoff)
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{
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switch (handoff) {
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case SOC64_HANDOFF_MAGIC_BOOT:
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case SOC64_HANDOFF_MAGIC_MUX:
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case SOC64_HANDOFF_MAGIC_IOCTL:
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case SOC64_HANDOFF_MAGIC_FPGA:
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case SOC64_HANDOFF_MAGIC_DELAY:
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case SOC64_HANDOFF_MAGIC_CLOCK:
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case SOC64_HANDOFF_MAGIC_MISC:
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return BIG_ENDIAN;
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#if IS_ENABLED(CONFIG_TARGET_SOCFPGA_N5X)
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case SOC64_HANDOFF_DDR_UMCTL2_MAGIC:
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debug("%s: umctl2 handoff data\n", __func__);
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return LITTLE_ENDIAN;
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case SOC64_HANDOFF_DDR_PHY_MAGIC:
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debug("%s: PHY handoff data\n", __func__);
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return LITTLE_ENDIAN;
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case SOC64_HANDOFF_DDR_PHY_INIT_ENGINE_MAGIC:
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debug("%s: PHY engine handoff data\n", __func__);
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return LITTLE_ENDIAN;
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#endif
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default:
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debug("%s: Unknown endianness!!\n", __func__);
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return UNKNOWN_ENDIANNESS;
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}
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}
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static int getting_endianness(void *handoff_address, enum endianness *endian_t)
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{
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/* Checking handoff data is little endian ? */
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*endian_t = check_endianness(readl(handoff_address));
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if (*endian_t == UNKNOWN_ENDIANNESS) {
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/* Trying to check handoff data is big endian? */
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*endian_t = check_endianness(swab32(readl(handoff_address)));
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if (*endian_t == UNKNOWN_ENDIANNESS) {
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debug("%s: Cannot find HANDOFF MAGIC ", __func__);
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debug("at addr 0x%p\n", (u32 *)handoff_address);
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return -EPERM;
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}
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}
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return 0;
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}
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int socfpga_get_handoff_size(void *handoff_address)
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{
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u32 size;
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int ret;
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enum endianness endian_t;
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ret = getting_endianness(handoff_address, &endian_t);
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if (ret)
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return ret;
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size = readl(handoff_address + SOC64_HANDOFF_OFFSET_LENGTH);
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if (endian_t == BIG_ENDIAN)
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size = swab32(size);
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size = (size - SOC64_HANDOFF_OFFSET_DATA) / sizeof(u32);
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debug("%s: handoff address = 0x%p handoff size = 0x%08x\n", __func__,
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(u32 *)handoff_address, size);
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return size;
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}
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int socfpga_handoff_read(void *handoff_address, void *table, u32 table_len)
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{
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u32 temp;
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u32 *table_x32 = table;
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u32 i = 0;
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int ret;
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enum endianness endian_t;
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ret = getting_endianness(handoff_address, &endian_t);
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if (ret)
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return ret;
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temp = readl(handoff_address + SOC64_HANDOFF_OFFSET_DATA +
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(i * sizeof(u32)));
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if (endian_t == BIG_ENDIAN) {
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debug("%s: Handoff addr = 0x%p ", __func__, (u32 *)handoff_address);
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debug("Handoff table address = 0x%p ", table_x32);
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debug("table length = 0x%x\n", table_len);
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debug("%s: handoff data =\n{\n", __func__);
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*table_x32 = swab32(temp);
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} else if (endian_t == LITTLE_ENDIAN) {
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debug(" {\n");
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*table_x32 = temp;
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}
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debug(" No.%d Addr 0x%08x: ", i, *table_x32);
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for (i = 1; i < table_len; i++) {
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table_x32++;
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temp = readl(handoff_address +
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SOC64_HANDOFF_OFFSET_DATA +
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(i * sizeof(u32)));
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if (endian_t == BIG_ENDIAN)
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*table_x32 = swab32(temp);
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else if (endian_t == LITTLE_ENDIAN)
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*table_x32 = temp;
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if (!(i % 2))
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debug(" No.%d Addr 0x%08x: ", i,
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*table_x32);
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else
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debug(" 0x%08x\n", *table_x32);
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}
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debug("\n}\n");
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return 0;
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}
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