1 /* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License as published by 4 * the Free Software Foundation; either version 2 of the License, or 5 * (at your option) any later version. 6 * 7 * This program is distributed in the hope that it will be useful, 8 * but WITHOUT ANY WARRANTY; without even the implied warranty of 9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 * GNU General Public License for more details. 11 */ 12 13 #include <linux/kernel.h> 14 #include <linux/module.h> 15 #include <linux/of.h> 16 #include <linux/of_device.h> 17 #include <linux/regmap.h> 18 #include <linux/mfd/syscon.h> 19 20 #include "cpsw.h" 21 22 #define CTRL_MAC_LO_REG(offset, id) ((offset) + 0x8 * (id)) 23 #define CTRL_MAC_HI_REG(offset, id) ((offset) + 0x8 * (id) + 0x4) 24 25 static int davinci_emac_3517_get_macid(struct device *dev, u16 offset, 26 int slave, u8 *mac_addr) 27 { 28 u32 macid_lsb; 29 u32 macid_msb; 30 struct regmap *syscon; 31 32 syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon"); 33 if (IS_ERR(syscon)) { 34 if (PTR_ERR(syscon) == -ENODEV) 35 return 0; 36 return PTR_ERR(syscon); 37 } 38 39 regmap_read(syscon, CTRL_MAC_LO_REG(offset, slave), &macid_lsb); 40 regmap_read(syscon, CTRL_MAC_HI_REG(offset, slave), &macid_msb); 41 42 mac_addr[0] = (macid_msb >> 16) & 0xff; 43 mac_addr[1] = (macid_msb >> 8) & 0xff; 44 mac_addr[2] = macid_msb & 0xff; 45 mac_addr[3] = (macid_lsb >> 16) & 0xff; 46 mac_addr[4] = (macid_lsb >> 8) & 0xff; 47 mac_addr[5] = macid_lsb & 0xff; 48 49 return 0; 50 } 51 52 static int cpsw_am33xx_cm_get_macid(struct device *dev, u16 offset, int slave, 53 u8 *mac_addr) 54 { 55 u32 macid_lo; 56 u32 macid_hi; 57 struct regmap *syscon; 58 59 syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon"); 60 if (IS_ERR(syscon)) { 61 if (PTR_ERR(syscon) == -ENODEV) 62 return 0; 63 return PTR_ERR(syscon); 64 } 65 66 regmap_read(syscon, CTRL_MAC_LO_REG(offset, slave), &macid_lo); 67 regmap_read(syscon, CTRL_MAC_HI_REG(offset, slave), &macid_hi); 68 69 mac_addr[5] = (macid_lo >> 8) & 0xff; 70 mac_addr[4] = macid_lo & 0xff; 71 mac_addr[3] = (macid_hi >> 24) & 0xff; 72 mac_addr[2] = (macid_hi >> 16) & 0xff; 73 mac_addr[1] = (macid_hi >> 8) & 0xff; 74 mac_addr[0] = macid_hi & 0xff; 75 76 return 0; 77 } 78 79 int ti_cm_get_macid(struct device *dev, int slave, u8 *mac_addr) 80 { 81 if (of_machine_is_compatible("ti,dm8148")) 82 return cpsw_am33xx_cm_get_macid(dev, 0x630, slave, mac_addr); 83 84 if (of_machine_is_compatible("ti,am33xx")) 85 return cpsw_am33xx_cm_get_macid(dev, 0x630, slave, mac_addr); 86 87 if (of_device_is_compatible(dev->of_node, "ti,am3517-emac")) 88 return davinci_emac_3517_get_macid(dev, 0x110, slave, mac_addr); 89 90 if (of_device_is_compatible(dev->of_node, "ti,dm816-emac")) 91 return cpsw_am33xx_cm_get_macid(dev, 0x30, slave, mac_addr); 92 93 if (of_machine_is_compatible("ti,am43")) 94 return cpsw_am33xx_cm_get_macid(dev, 0x630, slave, mac_addr); 95 96 if (of_machine_is_compatible("ti,dra7")) 97 return davinci_emac_3517_get_macid(dev, 0x514, slave, mac_addr); 98 99 dev_info(dev, "incompatible machine/device type for reading mac address\n"); 100 return -ENOENT; 101 } 102 EXPORT_SYMBOL_GPL(ti_cm_get_macid); 103 104 MODULE_LICENSE("GPL"); 105