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