1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * CPSW common - libs used across TI ethernet devices.
4 *
5 * Copyright (C) 2016, Texas Instruments, Incorporated
6 */
7
8#include <common.h>
9#include <dm.h>
10#include <fdt_support.h>
11#include <asm/global_data.h>
12#include <asm/io.h>
13#include <cpsw.h>
14#include <dm/device_compat.h>
15#include <linux/printk.h>
16
17DECLARE_GLOBAL_DATA_PTR;
18
19#define CTRL_MAC_REG(offset, id) ((offset) + 0x8 * (id))
20
21static void davinci_emac_3517_get_macid(u32 addr, u8 *mac_addr)
22{
23	/* try reading mac address from efuse */
24	u32 macid_lsb = readl(addr);
25	u32 macid_msb = readl(addr + 4);
26
27	mac_addr[0] = (macid_msb >> 16) & 0xff;
28	mac_addr[1] = (macid_msb >> 8)  & 0xff;
29	mac_addr[2] = macid_msb & 0xff;
30	mac_addr[3] = (macid_lsb >> 16) & 0xff;
31	mac_addr[4] = (macid_lsb >> 8)  & 0xff;
32	mac_addr[5] = macid_lsb & 0xff;
33}
34
35static void cpsw_am33xx_cm_get_macid(u32 addr, u8 *mac_addr)
36{
37	/* try reading mac address from efuse */
38	u32 macid_lo = readl(addr);
39	u32 macid_hi = readl(addr + 4);
40
41	mac_addr[5] = (macid_lo >> 8) & 0xff;
42	mac_addr[4] = macid_lo & 0xff;
43	mac_addr[3] = (macid_hi >> 24) & 0xff;
44	mac_addr[2] = (macid_hi >> 16) & 0xff;
45	mac_addr[1] = (macid_hi >> 8) & 0xff;
46	mac_addr[0] = macid_hi & 0xff;
47}
48
49void ti_cm_get_macid(struct udevice *dev, struct cpsw_platform_data *data,
50		     u8 *mac_addr)
51{
52	if (!strcmp(data->macid_sel_compat, "cpsw,am33xx"))
53		cpsw_am33xx_cm_get_macid(data->syscon_addr, mac_addr);
54	else if (!strcmp(data->macid_sel_compat, "davinci,emac"))
55		davinci_emac_3517_get_macid(data->syscon_addr, mac_addr);
56}
57
58int ti_cm_get_macid_addr(struct udevice *dev, int slave,
59			 struct cpsw_platform_data *data)
60{
61	void *fdt = (void *)gd->fdt_blob;
62	int node = dev_of_offset(dev);
63	fdt32_t gmii = 0;
64	int syscon;
65	u16 offset;
66
67	if (of_machine_is_compatible("ti,dm8148")) {
68		offset = 0x630;
69		data->macid_sel_compat = "cpsw,am33xx";
70	} else if (of_machine_is_compatible("ti,am33xx")) {
71		offset = 0x630;
72		data->macid_sel_compat = "cpsw,am33xx";
73	} else if (device_is_compatible(dev, "ti,am3517-emac")) {
74		offset = 0x110;
75		data->macid_sel_compat = "davinci,emac";
76	} else if (device_is_compatible(dev, "ti,dm816-emac")) {
77		offset = 0x30;
78		data->macid_sel_compat = "cpsw,am33xx";
79	} else if (of_machine_is_compatible("ti,am43")) {
80		offset = 0x630;
81		data->macid_sel_compat = "cpsw,am33xx";
82	} else if (of_machine_is_compatible("ti,dra7")) {
83		offset = 0x514;
84		data->macid_sel_compat = "davinci,emac";
85	} else {
86		dev_err(dev, "incompatible machine/device type for reading mac address\n");
87		return -ENOENT;
88	}
89
90	syscon = fdtdec_lookup_phandle(fdt, node, "syscon");
91	if (syscon < 0) {
92		pr_err("Syscon offset not found\n");
93		return -ENOENT;
94	}
95
96	data->syscon_addr = (u32)map_physmem(fdt_translate_address(fdt, syscon,
97								   &gmii),
98					     sizeof(u32), MAP_NOCACHE);
99	if (data->syscon_addr == FDT_ADDR_T_NONE) {
100		pr_err("Not able to get syscon address to get mac efuse address\n");
101		return -ENOENT;
102	}
103
104	data->syscon_addr += CTRL_MAC_REG(offset, slave);
105
106	return 0;
107
108}
109