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