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[u-boot] / arch / powerpc / cpu / mpc8xxx / fdt.c
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * Copyright 2009-2014 Freescale Semiconductor, Inc.
4  *
5  * This file is derived from arch/powerpc/cpu/mpc85xx/cpu.c and
6  * arch/powerpc/cpu/mpc86xx/cpu.c. Basically this file contains
7  * cpu specific common code for 85xx/86xx processors.
8  */
9
10 #include <common.h>
11 #include <linux/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