LXR linux/drivers/net/ethernet/ti/cpsw-common.c

   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
  25static 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
  52static 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
  79int 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}
 102EXPORT_SYMBOL_GPL(ti_cm_get_macid);
 103
 104MODULE_LICENSE("GPL");
 105