| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame] | 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"); |