95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/regmap.h>
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#include <linux/mfd/syscon.h>
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#include "cpsw.h"
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#define CTRL_MAC_LO_REG(offset, id) ((offset) + 0x8 * (id))
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#define CTRL_MAC_HI_REG(offset, id) ((offset) + 0x8 * (id) + 0x4)
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static int davinci_emac_3517_get_macid(struct device *dev, u16 offset,
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int slave, u8 *mac_addr)
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{
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u32 macid_lsb;
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u32 macid_msb;
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struct regmap *syscon;
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syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
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if (IS_ERR(syscon)) {
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if (PTR_ERR(syscon) == -ENODEV)
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return 0;
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return PTR_ERR(syscon);
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}
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regmap_read(syscon, CTRL_MAC_LO_REG(offset, slave), &macid_lsb);
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regmap_read(syscon, CTRL_MAC_HI_REG(offset, slave), &macid_msb);
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mac_addr[0] = (macid_msb >> 16) & 0xff;
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mac_addr[1] = (macid_msb >> 8) & 0xff;
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mac_addr[2] = macid_msb & 0xff;
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mac_addr[3] = (macid_lsb >> 16) & 0xff;
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mac_addr[4] = (macid_lsb >> 8) & 0xff;
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mac_addr[5] = macid_lsb & 0xff;
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return 0;
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}
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static int cpsw_am33xx_cm_get_macid(struct device *dev, u16 offset, int slave,
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u8 *mac_addr)
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{
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u32 macid_lo;
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u32 macid_hi;
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struct regmap *syscon;
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syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
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if (IS_ERR(syscon)) {
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if (PTR_ERR(syscon) == -ENODEV)
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return 0;
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return PTR_ERR(syscon);
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}
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regmap_read(syscon, CTRL_MAC_LO_REG(offset, slave), &macid_lo);
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regmap_read(syscon, CTRL_MAC_HI_REG(offset, slave), &macid_hi);
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mac_addr[5] = (macid_lo >> 8) & 0xff;
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mac_addr[4] = macid_lo & 0xff;
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mac_addr[3] = (macid_hi >> 24) & 0xff;
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mac_addr[2] = (macid_hi >> 16) & 0xff;
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mac_addr[1] = (macid_hi >> 8) & 0xff;
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mac_addr[0] = macid_hi & 0xff;
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return 0;
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}
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int ti_cm_get_macid(struct device *dev, int slave, u8 *mac_addr)
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{
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if (of_machine_is_compatible("ti,dm8148"))
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return cpsw_am33xx_cm_get_macid(dev, 0x630, slave, mac_addr);
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if (of_machine_is_compatible("ti,am33xx"))
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return cpsw_am33xx_cm_get_macid(dev, 0x630, slave, mac_addr);
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if (of_device_is_compatible(dev->of_node, "ti,am3517-emac"))
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return davinci_emac_3517_get_macid(dev, 0x110, slave, mac_addr);
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if (of_device_is_compatible(dev->of_node, "ti,dm816-emac"))
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return cpsw_am33xx_cm_get_macid(dev, 0x30, slave, mac_addr);
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if (of_machine_is_compatible("ti,am43"))
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return cpsw_am33xx_cm_get_macid(dev, 0x630, slave, mac_addr);
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if (of_machine_is_compatible("ti,dra7"))
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return davinci_emac_3517_get_macid(dev, 0x514, slave, mac_addr);
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dev_info(dev, "incompatible machine/device type for reading mac address\n");
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return -ENOENT;
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}
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EXPORT_SYMBOL_GPL(ti_cm_get_macid);
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MODULE_LICENSE("GPL");
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