LXR uboot/drivers/net/ti/cpsw-common.c

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * CPSW common - libs used across TI ethernet devices.
   4 *
   5 * Copyright (C) 2016, Texas Instruments, Incorporated
   6 */
   7
   8#include <common.h>
   9#include <dm.h>
  10#include <fdt_support.h>
  11#include <asm/global_data.h>
  12#include <asm/io.h>
  13#include <cpsw.h>
  14#include <dm/device_compat.h>
  15
  16DECLARE_GLOBAL_DATA_PTR;
  17
  18#define CTRL_MAC_REG(offset, id) ((offset) + 0x8 * (id))
  19
  20static void davinci_emac_3517_get_macid(u32 addr, u8 *mac_addr)
  21{
  22        /* try reading mac address from efuse */
  23        u32 macid_lsb = readl(addr);
  24        u32 macid_msb = readl(addr + 4);
  25
  26        mac_addr[0] = (macid_msb >> 16) & 0xff;
  27        mac_addr[1] = (macid_msb >> 8)  & 0xff;
  28        mac_addr[2] = macid_msb & 0xff;
  29        mac_addr[3] = (macid_lsb >> 16) & 0xff;
  30        mac_addr[4] = (macid_lsb >> 8)  & 0xff;
  31        mac_addr[5] = macid_lsb & 0xff;
  32}
  33
  34static void cpsw_am33xx_cm_get_macid(u32 addr, u8 *mac_addr)
  35{
  36        /* try reading mac address from efuse */
  37        u32 macid_lo = readl(addr);
  38        u32 macid_hi = readl(addr + 4);
  39
  40        mac_addr[5] = (macid_lo >> 8) & 0xff;
  41        mac_addr[4] = macid_lo & 0xff;
  42        mac_addr[3] = (macid_hi >> 24) & 0xff;
  43        mac_addr[2] = (macid_hi >> 16) & 0xff;
  44        mac_addr[1] = (macid_hi >> 8) & 0xff;
  45        mac_addr[0] = macid_hi & 0xff;
  46}
  47
  48void ti_cm_get_macid(struct udevice *dev, struct cpsw_platform_data *data,
  49                     u8 *mac_addr)
  50{
  51        if (!strcmp(data->macid_sel_compat, "cpsw,am33xx"))
  52                cpsw_am33xx_cm_get_macid(data->syscon_addr, mac_addr);
  53        else if (!strcmp(data->macid_sel_compat, "davinci,emac"))
  54                davinci_emac_3517_get_macid(data->syscon_addr, mac_addr);
  55}
  56
  57int ti_cm_get_macid_addr(struct udevice *dev, int slave,
  58                         struct cpsw_platform_data *data)
  59{
  60        void *fdt = (void *)gd->fdt_blob;
  61        int node = dev_of_offset(dev);
  62        fdt32_t gmii = 0;
  63        int syscon;
  64        u16 offset;
  65
  66        if (of_machine_is_compatible("ti,dm8148")) {
  67                offset = 0x630;
  68                data->macid_sel_compat = "cpsw,am33xx";
  69        } else if (of_machine_is_compatible("ti,am33xx")) {
  70                offset = 0x630;
  71                data->macid_sel_compat = "cpsw,am33xx";
  72        } else if (device_is_compatible(dev, "ti,am3517-emac")) {
  73                offset = 0x110;
  74                data->macid_sel_compat = "davinci,emac";
  75        } else if (device_is_compatible(dev, "ti,dm816-emac")) {
  76                offset = 0x30;
  77                data->macid_sel_compat = "cpsw,am33xx";
  78        } else if (of_machine_is_compatible("ti,am43")) {
  79                offset = 0x630;
  80                data->macid_sel_compat = "cpsw,am33xx";
  81        } else if (of_machine_is_compatible("ti,dra7")) {
  82                offset = 0x514;
  83                data->macid_sel_compat = "davinci,emac";
  84        } else {
  85                dev_err(dev, "incompatible machine/device type for reading mac address\n");
  86                return -ENOENT;
  87        }
  88
  89        syscon = fdtdec_lookup_phandle(fdt, node, "syscon");
  90        if (syscon < 0) {
  91                pr_err("Syscon offset not found\n");
  92                return -ENOENT;
  93        }
  94
  95        data->syscon_addr = (u32)map_physmem(fdt_translate_address(fdt, syscon,
  96                                                                   &gmii),
  97                                             sizeof(u32), MAP_NOCACHE);
  98        if (data->syscon_addr == FDT_ADDR_T_NONE) {
  99                pr_err("Not able to get syscon address to get mac efuse address\n");
 100                return -ENOENT;
 101        }
 102
 103        data->syscon_addr += CTRL_MAC_REG(offset, slave);
 104
 105        return 0;
 106
 107}
 108