arch/powerpc/cpu/mpc8xxx/fdt.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2009-2014 Freescale Semiconductor, Inc.
   4  * Copyright 2020 NXP
   5  *
   6  * This file is derived from arch/powerpc/cpu/mpc85xx/cpu.c and
   7  * arch/powerpc/cpu/mpc86xx/cpu.c. Basically this file contains
   8  * cpu specific common code for 85xx/86xx processors.
   9  */
  10
  11 #include <common.h>
  12 #include <cpu_func.h>
  13 #include <linux/libfdt.h>
  14 #include <fdt_support.h>
  15 #include <asm/mp.h>
  16 #include <asm/fsl_serdes.h>
  17 #include <phy.h>
  18 #include <hwconfig.h>
  19
  20 #if defined(CONFIG_MP) && (defined(CONFIG_MPC85xx) || defined(CONFIG_MPC86xx))
  21 static int ft_del_cpuhandle(void *blob, int cpuhandle)
  22 {
  23         int off, ret = -FDT_ERR_NOTFOUND;
  24
  25         /* if we find a match, we'll delete at it which point the offsets are
  26          * invalid so we start over from the beginning
  27          */
  28         off = fdt_node_offset_by_prop_value(blob, -1, "cpu-handle",
  29                                                 &cpuhandle, 4);
  30         while (off != -FDT_ERR_NOTFOUND) {
  31                 fdt_delprop(blob, off, "cpu-handle");
  32                 ret = 1;
  33                 off = fdt_node_offset_by_prop_value(blob, -1, "cpu-handle",
  34                                 &cpuhandle, 4);
  35         }
  36
  37         return ret;
  38 }
  39
  40 void ft_fixup_num_cores(void *blob) {
  41         int off, num_cores, del_cores;
  42
  43         del_cores = 0;
  44         num_cores = cpu_numcores();
  45
  46         off = fdt_node_offset_by_prop_value(blob, -1, "device_type", "cpu", 4);
  47         while (off != -FDT_ERR_NOTFOUND) {
  48                 u32 *reg = (u32 *)fdt_getprop(blob, off, "reg", 0);
  49                 u32 phys_cpu_id = thread_to_core(*reg);
  50
  51                 if (!is_core_valid(phys_cpu_id) || is_core_disabled(phys_cpu_id)) {
  52                         int ph = fdt_get_phandle(blob, off);
  53
  54                         /* Delete the cpu node once there are no cpu handles */
  55                         if (-FDT_ERR_NOTFOUND == ft_del_cpuhandle(blob, ph)) {
  56                                 fdt_del_node(blob, off);
  57                                 del_cores++;
  58                         }
  59                         /* either we deleted some cpu handles or the cpu node
  60                          * so we reset the offset back to the start since we
  61                          * can't trust the offsets anymore
  62                          */
  63                         off = -1;
  64                 }
  65                 off = fdt_node_offset_by_prop_value(blob, off,
  66                                 "device_type", "cpu", 4);
  67         }
  68         debug ("%x core system found\n", num_cores);
  69         debug ("deleted %d extra core entry entries from device tree\n",
  70                                                                 del_cores);
  71 }
  72 #endif /* defined(CONFIG_MPC85xx) || defined(CONFIG_MPC86xx) */
  73
  74 int fdt_fixup_phy_connection(void *blob, int offset, phy_interface_t phyc)
  75 {
  76         const char *conn;
  77
  78         /* Do NOT apply fixup for backplane modes specified in DT */
  79         if (phyc == PHY_INTERFACE_MODE_XGMII) {
  80                 conn = fdt_getprop(blob, offset, "phy-connection-type", NULL);
  81                 if (is_backplane_mode(conn))
  82                         return 0;
  83         }
  84         return fdt_setprop_string(blob, offset, "phy-connection-type",
  85                                          phy_string_for_interface(phyc));
  86 }
  87
  88 #ifdef CONFIG_SYS_SRIO
  89 static inline void ft_disable_srio_port(void *blob, int srio_off, int port)
  90 {
  91         int off = fdt_node_offset_by_prop_value(blob, srio_off,
  92                         "cell-index", &port, 4);
  93         if (off >= 0) {
  94                 off = fdt_setprop_string(blob, off, "status", "disabled");
  95                 if (off > 0)
  96                         printf("WARNING unable to set status for fsl,srio "
  97                                 "port %d: %s\n", port, fdt_strerror(off));
  98         }
  99 }
 100
 101 static inline void ft_disable_rman(void *blob)
 102 {
 103         int off = fdt_node_offset_by_compatible(blob, -1, "fsl,rman");
 104         if (off >= 0) {
 105                 off = fdt_setprop_string(blob, off, "status", "disabled");
 106                 if (off > 0)
 107                         printf("WARNING unable to set status for fsl,rman %s\n",
 108                                 fdt_strerror(off));
 109         }
 110 }
 111
 112 static inline void ft_disable_rmu(void *blob)
 113 {
 114         int off = fdt_node_offset_by_compatible(blob, -1, "fsl,srio-rmu");
 115         if (off >= 0) {
 116                 off = fdt_setprop_string(blob, off, "status", "disabled");
 117                 if (off > 0)
 118                         printf("WARNING unable to set status for "
 119                                 "fsl,srio-rmu %s\n", fdt_strerror(off));
 120         }
 121 }
 122
 123 void ft_srio_setup(void *blob)
 124 {
 125         int srio1_used = 0, srio2_used = 0;
 126         int srio_off;
 127
 128         /* search for srio node, if doesn't exist just return - nothing todo */
 129         srio_off = fdt_node_offset_by_compatible(blob, -1, "fsl,srio");
 130         if (srio_off < 0)
 131                 return ;
 132
 133 #ifdef CONFIG_SRIO1
 134         if (is_serdes_configured(SRIO1))
 135                 srio1_used = 1;
 136 #endif
 137 #ifdef CONFIG_SRIO2
 138         if (is_serdes_configured(SRIO2))
 139                 srio2_used = 1;
 140 #endif
 141
 142         /* mark port1 disabled */
 143         if (!srio1_used)
 144                 ft_disable_srio_port(blob, srio_off, 1);
 145
 146         /* mark port2 disabled */
 147         if (!srio2_used)
 148                 ft_disable_srio_port(blob, srio_off, 2);
 149
 150         /* if both ports not used, disable controller, rmu and rman */
 151         if (!srio1_used && !srio2_used) {
 152                 fdt_setprop_string(blob, srio_off, "status", "disabled");
 153
 154                 ft_disable_rman(blob);
 155                 ft_disable_rmu(blob);
 156         }
 157 }
 158 #endif