drivers/pci/pcie_layerscape_fixup_common.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2019-2020 NXP
   4  *
   5  * PCIe DT fixup for NXP Layerscape SoCs
   6  * Author: Wasim Khan <wasim.khan@nxp.com>
   7  *
   8  */
   9
  10 #include <common.h>
  11 #include <init.h>
  12 #include <asm/arch/clock.h>
  13 #include <asm/arch/soc.h>
  14 #include "pcie_layerscape_fixup_common.h"
  15
  16 void ft_pci_setup(void *blob, bd_t *bd)
  17 {
  18 #if defined(CONFIG_PCIE_LAYERSCAPE_GEN4)
  19         uint svr;
  20
  21         svr = SVR_SOC_VER(get_svr());
  22
  23         if (svr == SVR_LX2160A && IS_SVR_REV(get_svr(), 1, 0))
  24                 ft_pci_setup_ls_gen4(blob, bd);
  25         else
  26 #endif /* CONFIG_PCIE_LAYERSCAPE_GEN4 */
  27                 ft_pci_setup_ls(blob, bd);
  28 }
  29
  30 #if defined(CONFIG_FSL_LAYERSCAPE)
  31 int lx2_board_fix_fdt(void *fdt)
  32 {
  33         char *reg_name, *old_str, *new_str;
  34         const char *reg_names;
  35         int names_len, old_str_len, new_str_len, remaining_str_len;
  36         struct str_map {
  37                 char *old_str;
  38                 char *new_str;
  39         } reg_names_map[] = {
  40                 { "csr_axi_slave", "regs" },
  41                 { "config_axi_slave", "config" }
  42         };
  43         int off = -1, i;
  44
  45         off = fdt_node_offset_by_compatible(fdt, -1, "fsl,lx2160a-pcie");
  46         while (off != -FDT_ERR_NOTFOUND) {
  47                 fdt_setprop(fdt, off, "compatible", "fsl,ls2088a-pcie",
  48                             strlen("fsl,ls2088a-pcie") + 1);
  49
  50                 reg_names = fdt_getprop(fdt, off, "reg-names", &names_len);
  51                 if (!reg_names)
  52                         continue;
  53                 reg_name = (char *)reg_names;
  54                 remaining_str_len = names_len - (reg_name - reg_names);
  55                 i = 0;
  56                 while ((i < ARRAY_SIZE(reg_names_map)) && remaining_str_len) {
  57                         old_str = reg_names_map[i].old_str;
  58                         new_str = reg_names_map[i].new_str;
  59                         old_str_len = strlen(old_str);
  60                         new_str_len = strlen(new_str);
  61                         if (memcmp(reg_name, old_str, old_str_len) == 0) {
  62                                 /* first only leave required bytes for new_str
  63                                  * and copy rest of the string after it
  64                                  */
  65                                 memcpy(reg_name + new_str_len,
  66                                        reg_name + old_str_len,
  67                                        remaining_str_len - old_str_len);
  68
  69                                 /* Now copy new_str */
  70                                 memcpy(reg_name, new_str, new_str_len);
  71                                 names_len -= old_str_len;
  72                                 names_len += new_str_len;
  73                                 i++;
  74                         }
  75
  76                         reg_name = memchr(reg_name, '\0', remaining_str_len);
  77                         if (!reg_name)
  78                                 break;
  79                         reg_name += 1;
  80
  81                         remaining_str_len = names_len - (reg_name - reg_names);
  82                 }
  83                 fdt_setprop(fdt, off, "reg-names", reg_names, names_len);
  84                 fdt_delprop(fdt, off, "apio-wins");
  85                 fdt_delprop(fdt, off, "ppio-wins");
  86                 off = fdt_node_offset_by_compatible(fdt, off,
  87                                                     "fsl,lx2160a-pcie");
  88         }
  89         return 0;
  90 }
  91
  92 int pcie_board_fix_fdt(void *fdt)
  93 {
  94         uint svr;
  95
  96         svr = SVR_SOC_VER(get_svr());
  97
  98         if (svr == SVR_LX2160A && IS_SVR_REV(get_svr(), 2, 0))
  99                 return lx2_board_fix_fdt(fdt);
 100
 101         return 0;
 102 }
 103
 104 #ifdef CONFIG_ARCH_LX2160A
 105 /* returns the next available streamid for pcie, -errno if failed */
 106 int pcie_next_streamid(int currentid, int idx)
 107 {
 108         if (currentid > FSL_PEX_STREAM_ID_END)
 109                 return -EINVAL;
 110
 111         return currentid | ((idx + 1) << 11);
 112 }
 113 #else
 114 /* returns the next available streamid for pcie, -errno if failed */
 115 int pcie_next_streamid(int currentid, int idx)
 116 {
 117         static int next_stream_id = FSL_PEX_STREAM_ID_START;
 118
 119         if (next_stream_id > FSL_PEX_STREAM_ID_END)
 120                 return -EINVAL;
 121
 122         return next_stream_id++;
 123 }
 124 #endif
 125 #endif /* CONFIG_FSL_LAYERSCAPE */