1 // SPDX-License-Identifier: GPL-2.0+
2
3 #include <linux/kernel.h>
4 #include <linux/module.h>
5 #include <linux/of.h>
6 #include <linux/of_device.h>
7 #include <linux/regmap.h>
8 #include <linux/mfd/syscon.h>
9
10 #include "cpsw.h"
11
12 #define CTRL_MAC_LO_REG(offset, id) ((offset) + 0x8 * (id))
13 #define CTRL_MAC_HI_REG(offset, id) ((offset) + 0x8 * (id) + 0x4)
14
davinci_emac_3517_get_macid(struct device * dev,u16 offset,int slave,u8 * mac_addr)15 static int davinci_emac_3517_get_macid(struct device *dev, u16 offset,
16 int slave, u8 *mac_addr)
17 {
18 u32 macid_lsb;
19 u32 macid_msb;
20 struct regmap *syscon;
21
22 syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
23 if (IS_ERR(syscon)) {
24 if (PTR_ERR(syscon) == -ENODEV)
25 return 0;
26 return PTR_ERR(syscon);
27 }
28
29 regmap_read(syscon, CTRL_MAC_LO_REG(offset, slave), &macid_lsb);
30 regmap_read(syscon, CTRL_MAC_HI_REG(offset, slave), &macid_msb);
31
32 mac_addr[0] = (macid_msb >> 16) & 0xff;
33 mac_addr[1] = (macid_msb >> 8) & 0xff;
34 mac_addr[2] = macid_msb & 0xff;
35 mac_addr[3] = (macid_lsb >> 16) & 0xff;
36 mac_addr[4] = (macid_lsb >> 8) & 0xff;
37 mac_addr[5] = macid_lsb & 0xff;
38
39 return 0;
40 }
41
cpsw_am33xx_cm_get_macid(struct device * dev,u16 offset,int slave,u8 * mac_addr)42 static int cpsw_am33xx_cm_get_macid(struct device *dev, u16 offset, int slave,
43 u8 *mac_addr)
44 {
45 u32 macid_lo;
46 u32 macid_hi;
47 struct regmap *syscon;
48
49 syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
50 if (IS_ERR(syscon)) {
51 if (PTR_ERR(syscon) == -ENODEV)
52 return 0;
53 return PTR_ERR(syscon);
54 }
55
56 regmap_read(syscon, CTRL_MAC_LO_REG(offset, slave), &macid_lo);
57 regmap_read(syscon, CTRL_MAC_HI_REG(offset, slave), &macid_hi);
58
59 mac_addr[5] = (macid_lo >> 8) & 0xff;
60 mac_addr[4] = macid_lo & 0xff;
61 mac_addr[3] = (macid_hi >> 24) & 0xff;
62 mac_addr[2] = (macid_hi >> 16) & 0xff;
63 mac_addr[1] = (macid_hi >> 8) & 0xff;
64 mac_addr[0] = macid_hi & 0xff;
65
66 return 0;
67 }
68
ti_cm_get_macid(struct device * dev,int slave,u8 * mac_addr)69 int ti_cm_get_macid(struct device *dev, int slave, u8 *mac_addr)
70 {
71 if (of_machine_is_compatible("ti,dm8148"))
72 return cpsw_am33xx_cm_get_macid(dev, 0x630, slave, mac_addr);
73
74 if (of_machine_is_compatible("ti,am33xx"))
75 return cpsw_am33xx_cm_get_macid(dev, 0x630, slave, mac_addr);
76
77 if (of_device_is_compatible(dev->of_node, "ti,am3517-emac"))
78 return davinci_emac_3517_get_macid(dev, 0x110, slave, mac_addr);
79
80 if (of_device_is_compatible(dev->of_node, "ti,dm816-emac"))
81 return cpsw_am33xx_cm_get_macid(dev, 0x30, slave, mac_addr);
82
83 if (of_machine_is_compatible("ti,am43"))
84 return cpsw_am33xx_cm_get_macid(dev, 0x630, slave, mac_addr);
85
86 if (of_machine_is_compatible("ti,dra7"))
87 return davinci_emac_3517_get_macid(dev, 0x514, slave, mac_addr);
88
89 dev_info(dev, "incompatible machine/device type for reading mac address\n");
90 return -ENOENT;
91 }
92 EXPORT_SYMBOL_GPL(ti_cm_get_macid);
93
94 MODULE_LICENSE("GPL");
95