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 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 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 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