| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 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,am4372")) |
| 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_err(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"); |