95 lines · c
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 14static 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 41static 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 68int 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}91EXPORT_SYMBOL_GPL(ti_cm_get_macid);92 93MODULE_DESCRIPTION("TI CPSW Switch common module");94MODULE_LICENSE("GPL");95