arch/powerpc/cpu/mpc8xxx/fdt.c

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