drivers/net/cpsw-common.c

   1 /*
   2  * CPSW common - libs used across TI ethernet devices.
   3  *
   4  * Copyright (C) 2016, Texas Instruments, Incorporated
   5  *
   6  * SPDX-License-Identifier: GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <dm.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 int davinci_emac_3517_get_macid(struct udevice *dev, u16 offset,
  20                                        int slave, u8 *mac_addr)
  21 {
  22         void *fdt = (void *)gd->fdt_blob;
  23         int node = dev_of_offset(dev);
  24         u32 macid_lsb;
  25         u32 macid_msb;
  26         fdt32_t gmii = 0;
  27         int syscon;
  28         u32 addr;
  29
  30         syscon = fdtdec_lookup_phandle(fdt, node, "syscon");
  31         if (syscon < 0) {
  32                 pr_err("Syscon offset not found\n");
  33                 return -ENOENT;
  34         }
  35
  36         addr = (u32)map_physmem(fdt_translate_address(fdt, syscon, &gmii),
  37                                 sizeof(u32), MAP_NOCACHE);
  38         if (addr == FDT_ADDR_T_NONE) {
  39                 pr_err("Not able to get syscon address to get mac efuse address\n");
  40                 return -ENOENT;
  41         }
  42
  43         addr += CTRL_MAC_REG(offset, slave);
  44
  45         /* try reading mac address from efuse */
  46         macid_lsb = readl(addr);
  47         macid_msb = readl(addr + 4);
  48
  49         mac_addr[0] = (macid_msb >> 16) & 0xff;
  50         mac_addr[1] = (macid_msb >> 8)  & 0xff;
  51         mac_addr[2] = macid_msb & 0xff;
  52         mac_addr[3] = (macid_lsb >> 16) & 0xff;
  53         mac_addr[4] = (macid_lsb >> 8)  & 0xff;
  54         mac_addr[5] = macid_lsb & 0xff;
  55
  56         return 0;
  57 }
  58
  59 static int cpsw_am33xx_cm_get_macid(struct udevice *dev, u16 offset, int slave,
  60                                     u8 *mac_addr)
  61 {
  62         void *fdt = (void *)gd->fdt_blob;
  63         int node = dev_of_offset(dev);
  64         u32 macid_lo;
  65         u32 macid_hi;
  66         fdt32_t gmii = 0;
  67         int syscon;
  68         u32 addr;
  69
  70         syscon = fdtdec_lookup_phandle(fdt, node, "syscon");
  71         if (syscon < 0) {
  72                 pr_err("Syscon offset not found\n");
  73                 return -ENOENT;
  74         }
  75
  76         addr = (u32)map_physmem(fdt_translate_address(fdt, syscon, &gmii),
  77                                 sizeof(u32), MAP_NOCACHE);
  78         if (addr == FDT_ADDR_T_NONE) {
  79                 pr_err("Not able to get syscon address to get mac efuse address\n");
  80                 return -ENOENT;
  81         }
  82
  83         addr += CTRL_MAC_REG(offset, slave);
  84
  85         /* try reading mac address from efuse */
  86         macid_lo = readl(addr);
  87         macid_hi = readl(addr + 4);
  88
  89         mac_addr[5] = (macid_lo >> 8) & 0xff;
  90         mac_addr[4] = macid_lo & 0xff;
  91         mac_addr[3] = (macid_hi >> 24) & 0xff;
  92         mac_addr[2] = (macid_hi >> 16) & 0xff;
  93         mac_addr[1] = (macid_hi >> 8) & 0xff;
  94         mac_addr[0] = macid_hi & 0xff;
  95
  96         return 0;
  97 }
  98
  99 int ti_cm_get_macid(struct udevice *dev, int slave, u8 *mac_addr)
 100 {
 101         if (of_machine_is_compatible("ti,dm8148"))
 102                 return cpsw_am33xx_cm_get_macid(dev, 0x630, slave, mac_addr);
 103
 104         if (of_machine_is_compatible("ti,am33xx"))
 105                 return cpsw_am33xx_cm_get_macid(dev, 0x630, slave, mac_addr);
 106
 107         if (device_is_compatible(dev, "ti,am3517-emac"))
 108                 return davinci_emac_3517_get_macid(dev, 0x110, slave, mac_addr);
 109
 110         if (device_is_compatible(dev, "ti,dm816-emac"))
 111                 return cpsw_am33xx_cm_get_macid(dev, 0x30, slave, mac_addr);
 112
 113         if (of_machine_is_compatible("ti,am43"))
 114                 return cpsw_am33xx_cm_get_macid(dev, 0x630, slave, mac_addr);
 115
 116         if (of_machine_is_compatible("ti,dra7"))
 117                 return davinci_emac_3517_get_macid(dev, 0x514, slave, mac_addr);
 118
 119         dev_err(dev, "incompatible machine/device type for reading mac address\n");
 120         return -ENOENT;
 121 }