u-boot/board/freescale/ls1088a/eth_ls1088aqds.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright 2017 NXP
 */

#include <asm/io.h>
#include <asm/arch/fsl_serdes.h>
#include <fsl-mc/fsl_mc.h>

#if defined(CONFIG_RESET_PHY_R)
void reset_phy(void)
{
	mc_env_boot();
}
#endif /* CONFIG_RESET_PHY_R */

#if defined(CONFIG_MULTI_DTB_FIT)

/* Structure to hold SERDES protocols supported (network interfaces are
 * described in the DTS).
 *
 * @serdes_block: the index of the SERDES block
 * @serdes_protocol: the decimal value of the protocol supported
 * @dts_needed: DTS notes describing the current configuration are needed
 *
 * When dts_needed is true, the board_fit_config_name_match() function
 * will try to exactly match the current configuration of the block with a DTS
 * name provided.
 */
static struct serdes_configuration {
	u8 serdes_block;
	u32 serdes_protocol;
	bool dts_needed;
} supported_protocols[] = {
	/* Serdes block #1 */
	{1, 21, true},
	{1, 29, true},
};

#define SUPPORTED_SERDES_PROTOCOLS ARRAY_SIZE(supported_protocols)

static bool protocol_supported(u8 serdes_block, u32 protocol)
{
	struct serdes_configuration serdes_conf;
	int i;

	for (i = 0; i < SUPPORTED_SERDES_PROTOCOLS; i++) {
		serdes_conf = supported_protocols[i];
		if (serdes_conf.serdes_block == serdes_block &&
		    serdes_conf.serdes_protocol == protocol)
			return true;
	}

	return false;
}

static void get_str_protocol(u8 serdes_block, u32 protocol, char *str)
{
	struct serdes_configuration serdes_conf;
	int i;

	for (i = 0; i < SUPPORTED_SERDES_PROTOCOLS; i++) {
		serdes_conf = supported_protocols[i];
		if (serdes_conf.serdes_block == serdes_block &&
		    serdes_conf.serdes_protocol == protocol) {
			if (serdes_conf.dts_needed == true)
				sprintf(str, "%u", protocol);
			else
				sprintf(str, "x");
			return;
		}
	}
}

int board_fit_config_name_match(const char *name)
{
	struct ccsr_gur *gur = (void *)(CFG_SYS_FSL_GUTS_ADDR);
	char expected_dts[100];
	char srds_s1_str[2];
	u32 srds_s1, cfg;

	cfg = in_le32(&gur->rcwsr[FSL_CHASSIS3_SRDS1_REGSR - 1]) &
		      FSL_CHASSIS3_SRDS1_PRTCL_MASK;
	cfg >>= FSL_CHASSIS3_SRDS1_PRTCL_SHIFT;
	srds_s1 = serdes_get_number(FSL_SRDS_1, cfg);

	/* Check for supported protocols. The default DTS will be used
	 * in this case
	 */
	if (!protocol_supported(1, srds_s1))
		return -1;

	get_str_protocol(1, srds_s1, srds_s1_str);

	sprintf(expected_dts, "fsl-ls1088a-qds-%s-x", srds_s1_str);

	if (!strcmp(name, expected_dts))
		return 0;

	return -1;
}
#endif