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