1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright 2011-2015 Freescale Semiconductor, Inc.
4 */
5
6#include <common.h>
7#include <linux/libfdt.h>
8#include <linux/libfdt_env.h>
9#include <fdt_support.h>
10
11#include <fm_eth.h>
12#ifdef CONFIG_FSL_LAYERSCAPE
13#include <asm/arch/fsl_serdes.h>
14#else
15#include <asm/fsl_serdes.h>
16#endif
17
18/*
19 * Given the following ...
20 *
21 * 1) A pointer to an Fman Ethernet node (as identified by the 'compat'
22 * compatible string and 'addr' physical address)
23 *
24 * 2) The name of an alias that points to the ethernet-phy node (usually inside
25 * a virtual MDIO node)
26 *
27 * ... update that Ethernet node's phy-handle property to point to the
28 * ethernet-phy node.  This is how we link an Ethernet node to its PHY, so each
29 * PHY in a virtual MDIO node must have an alias.
30 *
31 * Returns 0 on success, or a negative FDT error code on error.
32 */
33int fdt_set_phy_handle(void *fdt, char *compat, phys_addr_t addr,
34			const char *alias)
35{
36	int offset;
37	unsigned int ph;
38	const char *path;
39
40	/* Get a path to the node that 'alias' points to */
41	path = fdt_get_alias(fdt, alias);
42	if (!path)
43		return -FDT_ERR_BADPATH;
44
45	/* Get the offset of that node */
46	offset = fdt_path_offset(fdt, path);
47	if (offset < 0)
48		return offset;
49
50	ph = fdt_create_phandle(fdt, offset);
51	if (!ph)
52		return -FDT_ERR_BADPHANDLE;
53
54	ph = cpu_to_fdt32(ph);
55
56	offset = fdt_node_offset_by_compat_reg(fdt, compat, addr);
57	if (offset < 0)
58		return offset;
59
60	return fdt_setprop(fdt, offset, "phy-handle", &ph, sizeof(ph));
61}
62
63/*
64 * Return the SerDes device enum for a given Fman port
65 *
66 * This function just maps the fm_port namespace to the srds_prtcl namespace.
67 */
68enum srds_prtcl serdes_device_from_fm_port(enum fm_port port)
69{
70	static const enum srds_prtcl srds_table[] = {
71		[FM1_DTSEC1] = SGMII_FM1_DTSEC1,
72		[FM1_DTSEC2] = SGMII_FM1_DTSEC2,
73		[FM1_DTSEC3] = SGMII_FM1_DTSEC3,
74		[FM1_DTSEC4] = SGMII_FM1_DTSEC4,
75		[FM1_DTSEC5] = SGMII_FM1_DTSEC5,
76		[FM1_10GEC1] = XAUI_FM1,
77		[FM2_DTSEC1] = SGMII_FM2_DTSEC1,
78		[FM2_DTSEC2] = SGMII_FM2_DTSEC2,
79		[FM2_DTSEC3] = SGMII_FM2_DTSEC3,
80		[FM2_DTSEC4] = SGMII_FM2_DTSEC4,
81		[FM2_DTSEC5] = SGMII_FM2_DTSEC5,
82		[FM2_10GEC1] = XAUI_FM2,
83	};
84
85	if ((port < FM1_DTSEC1) || (port > FM2_10GEC1))
86		return NONE;
87	else
88		return srds_table[port];
89}
90