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