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 #ifndef CONFIG_USB_MAX_CONTROLLER_COUNT
  21 #define CONFIG_USB_MAX_CONTROLLER_COUNT 1
  22 #endif
  23
  24 #if defined(CONFIG_MP) && (defined(CONFIG_MPC85xx) || defined(CONFIG_MPC86xx))
  25 static int ft_del_cpuhandle(void *blob, int cpuhandle)
  26 {
  27         int off, ret = -FDT_ERR_NOTFOUND;
  28
  29         /* if we find a match, we'll delete at it which point the offsets are
  30          * invalid so we start over from the beginning
  31          */
  32         off = fdt_node_offset_by_prop_value(blob, -1, "cpu-handle",
  33                                                 &cpuhandle, 4);
  34         while (off != -FDT_ERR_NOTFOUND) {
  35                 fdt_delprop(blob, off, "cpu-handle");
  36                 ret = 1;
  37                 off = fdt_node_offset_by_prop_value(blob, -1, "cpu-handle",
  38                                 &cpuhandle, 4);
  39         }
  40
  41         return ret;
  42 }
  43
  44 void ft_fixup_num_cores(void *blob) {
  45         int off, num_cores, del_cores;
  46
  47         del_cores = 0;
  48         num_cores = cpu_numcores();
  49
  50         off = fdt_node_offset_by_prop_value(blob, -1, "device_type", "cpu", 4);
  51         while (off != -FDT_ERR_NOTFOUND) {
  52                 u32 *reg = (u32 *)fdt_getprop(blob, off, "reg", 0);
  53                 u32 phys_cpu_id = thread_to_core(*reg);
  54
  55                 if (!is_core_valid(phys_cpu_id) || is_core_disabled(phys_cpu_id)) {
  56                         int ph = fdt_get_phandle(blob, off);
  57
  58                         /* Delete the cpu node once there are no cpu handles */
  59                         if (-FDT_ERR_NOTFOUND == ft_del_cpuhandle(blob, ph)) {
  60                                 fdt_del_node(blob, off);
  61                                 del_cores++;
  62                         }
  63                         /* either we deleted some cpu handles or the cpu node
  64                          * so we reset the offset back to the start since we
  65                          * can't trust the offsets anymore
  66                          */
  67                         off = -1;
  68                 }
  69                 off = fdt_node_offset_by_prop_value(blob, off,
  70                                 "device_type", "cpu", 4);
  71         }
  72         debug ("%x core system found\n", num_cores);
  73         debug ("deleted %d extra core entry entries from device tree\n",
  74                                                                 del_cores);
  75 }
  76 #endif /* defined(CONFIG_MPC85xx) || defined(CONFIG_MPC86xx) */
  77
  78 int fdt_fixup_phy_connection(void *blob, int offset, phy_interface_t phyc)
  79 {
  80         const char *conn;
  81
  82         /* Do NOT apply fixup for backplane modes specified in DT */
  83         if (phyc == PHY_INTERFACE_MODE_XGMII) {
  84                 conn = fdt_getprop(blob, offset, "phy-connection-type", NULL);
  85                 if (is_backplane_mode(conn))
  86                         return 0;
  87         }
  88         return fdt_setprop_string(blob, offset, "phy-connection-type",
  89                                          phy_string_for_interface(phyc));
  90 }
  91
  92 #ifdef CONFIG_SYS_SRIO
  93 static inline void ft_disable_srio_port(void *blob, int srio_off, int port)
  94 {
  95         int off = fdt_node_offset_by_prop_value(blob, srio_off,
  96                         "cell-index", &port, 4);
  97         if (off >= 0) {
  98                 off = fdt_setprop_string(blob, off, "status", "disabled");
  99                 if (off > 0)
 100                         printf("WARNING unable to set status for fsl,srio "
 101                                 "port %d: %s\n", port, fdt_strerror(off));
 102         }
 103 }
 104
 105 static inline void ft_disable_rman(void *blob)
 106 {
 107         int off = fdt_node_offset_by_compatible(blob, -1, "fsl,rman");
 108         if (off >= 0) {
 109                 off = fdt_setprop_string(blob, off, "status", "disabled");
 110                 if (off > 0)
 111                         printf("WARNING unable to set status for fsl,rman %s\n",
 112                                 fdt_strerror(off));
 113         }
 114 }
 115
 116 static inline void ft_disable_rmu(void *blob)
 117 {
 118         int off = fdt_node_offset_by_compatible(blob, -1, "fsl,srio-rmu");
 119         if (off >= 0) {
 120                 off = fdt_setprop_string(blob, off, "status", "disabled");
 121                 if (off > 0)
 122                         printf("WARNING unable to set status for "
 123                                 "fsl,srio-rmu %s\n", fdt_strerror(off));
 124         }
 125 }
 126
 127 void ft_srio_setup(void *blob)
 128 {
 129         int srio1_used = 0, srio2_used = 0;
 130         int srio_off;
 131
 132         /* search for srio node, if doesn't exist just return - nothing todo */
 133         srio_off = fdt_node_offset_by_compatible(blob, -1, "fsl,srio");
 134         if (srio_off < 0)
 135                 return ;
 136
 137 #ifdef CONFIG_SRIO1
 138         if (is_serdes_configured(SRIO1))
 139                 srio1_used = 1;
 140 #endif
 141 #ifdef CONFIG_SRIO2
 142         if (is_serdes_configured(SRIO2))
 143                 srio2_used = 1;
 144 #endif
 145
 146         /* mark port1 disabled */
 147         if (!srio1_used)
 148                 ft_disable_srio_port(blob, srio_off, 1);
 149
 150         /* mark port2 disabled */
 151         if (!srio2_used)
 152                 ft_disable_srio_port(blob, srio_off, 2);
 153
 154         /* if both ports not used, disable controller, rmu and rman */
 155         if (!srio1_used && !srio2_used) {
 156                 fdt_setprop_string(blob, srio_off, "status", "disabled");
 157
 158                 ft_disable_rman(blob);
 159                 ft_disable_rmu(blob);
 160         }
 161 }
 162 #endif