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 <environment.h>
11 #include <fdt_support.h>
12 #include <asm/io.h>
13 #include <cpsw.h>
14
15 DECLARE_GLOBAL_DATA_PTR;
16
17 #define CTRL_MAC_REG(offset, id) ((offset) + 0x8 * (id))
18
davinci_emac_3517_get_macid(struct udevice * dev,u16 offset,int slave,u8 * mac_addr)19 static int davinci_emac_3517_get_macid(struct udevice *dev, u16 offset,
20 int slave, u8 *mac_addr)
21 {
22 void *fdt = (void *)gd->fdt_blob;
23 int node = dev_of_offset(dev);
24 u32 macid_lsb;
25 u32 macid_msb;
26 fdt32_t gmii = 0;
27 int syscon;
28 u32 addr;
29
30 syscon = fdtdec_lookup_phandle(fdt, node, "syscon");
31 if (syscon < 0) {
32 pr_err("Syscon offset not found\n");
33 return -ENOENT;
34 }
35
36 addr = (u32)map_physmem(fdt_translate_address(fdt, syscon, &gmii),
37 sizeof(u32), MAP_NOCACHE);
38 if (addr == FDT_ADDR_T_NONE) {
39 pr_err("Not able to get syscon address to get mac efuse address\n");
40 return -ENOENT;
41 }
42
43 addr += CTRL_MAC_REG(offset, slave);
44
45 /* try reading mac address from efuse */
46 macid_lsb = readl(addr);
47 macid_msb = readl(addr + 4);
48
49 mac_addr[0] = (macid_msb >> 16) & 0xff;
50 mac_addr[1] = (macid_msb >> 8) & 0xff;
51 mac_addr[2] = macid_msb & 0xff;
52 mac_addr[3] = (macid_lsb >> 16) & 0xff;
53 mac_addr[4] = (macid_lsb >> 8) & 0xff;
54 mac_addr[5] = macid_lsb & 0xff;
55
56 return 0;
57 }
58
cpsw_am33xx_cm_get_macid(struct udevice * dev,u16 offset,int slave,u8 * mac_addr)59 static int cpsw_am33xx_cm_get_macid(struct udevice *dev, u16 offset, int slave,
60 u8 *mac_addr)
61 {
62 void *fdt = (void *)gd->fdt_blob;
63 int node = dev_of_offset(dev);
64 u32 macid_lo;
65 u32 macid_hi;
66 fdt32_t gmii = 0;
67 int syscon;
68 u32 addr;
69
70 syscon = fdtdec_lookup_phandle(fdt, node, "syscon");
71 if (syscon < 0) {
72 pr_err("Syscon offset not found\n");
73 return -ENOENT;
74 }
75
76 addr = (u32)map_physmem(fdt_translate_address(fdt, syscon, &gmii),
77 sizeof(u32), MAP_NOCACHE);
78 if (addr == FDT_ADDR_T_NONE) {
79 pr_err("Not able to get syscon address to get mac efuse address\n");
80 return -ENOENT;
81 }
82
83 addr += CTRL_MAC_REG(offset, slave);
84
85 /* try reading mac address from efuse */
86 macid_lo = readl(addr);
87 macid_hi = readl(addr + 4);
88
89 mac_addr[5] = (macid_lo >> 8) & 0xff;
90 mac_addr[4] = macid_lo & 0xff;
91 mac_addr[3] = (macid_hi >> 24) & 0xff;
92 mac_addr[2] = (macid_hi >> 16) & 0xff;
93 mac_addr[1] = (macid_hi >> 8) & 0xff;
94 mac_addr[0] = macid_hi & 0xff;
95
96 return 0;
97 }
98
ti_cm_get_macid(struct udevice * dev,int slave,u8 * mac_addr)99 int ti_cm_get_macid(struct udevice *dev, int slave, u8 *mac_addr)
100 {
101 if (of_machine_is_compatible("ti,dm8148"))
102 return cpsw_am33xx_cm_get_macid(dev, 0x630, slave, mac_addr);
103
104 if (of_machine_is_compatible("ti,am33xx"))
105 return cpsw_am33xx_cm_get_macid(dev, 0x630, slave, mac_addr);
106
107 if (device_is_compatible(dev, "ti,am3517-emac"))
108 return davinci_emac_3517_get_macid(dev, 0x110, slave, mac_addr);
109
110 if (device_is_compatible(dev, "ti,dm816-emac"))
111 return cpsw_am33xx_cm_get_macid(dev, 0x30, slave, mac_addr);
112
113 if (of_machine_is_compatible("ti,am43"))
114 return cpsw_am33xx_cm_get_macid(dev, 0x630, slave, mac_addr);
115
116 if (of_machine_is_compatible("ti,dra7"))
117 return davinci_emac_3517_get_macid(dev, 0x514, slave, mac_addr);
118
119 dev_err(dev, "incompatible machine/device type for reading mac address\n");
120 return -ENOENT;
121 }
122