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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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f0e82d737d
It is quite common for ti_cm_get_macid() to fail on some of the platforms it is invoked on. They include any platform where mac address is not part of SoC register space. On these platforms, mac address is read and populated in device-tree by bootloader. An example is TI DA850. Downgrade the severity of message to "information", so it does not spam logs when 'quiet' boot is desired. Signed-off-by: Sekhar Nori <nsekhar@ti.com> Signed-off-by: David S. Miller <davem@davemloft.net>
105 lines
3.1 KiB
C
105 lines
3.1 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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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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