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
  16 DECLARE_GLOBAL_DATA_PTR;
  17
  18 #define CTRL_MAC_REG(offset, id) ((offset) + 0x8 * (id))
  19
  20 static 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
  34 static 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
  48 void 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
  57 int 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 }