xref: /openbmc/u-boot/arch/powerpc/cpu/mpc8xxx/fdt.c (revision e8f80a5a)
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))
ft_del_cpuhandle(void * blob,int cpuhandle)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 
ft_fixup_num_cores(void * blob)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 
fdt_fixup_phy_connection(void * blob,int offset,phy_interface_t phyc)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
ft_disable_srio_port(void * blob,int srio_off,int port)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 
ft_disable_rman(void * blob)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 
ft_disable_rmu(void * blob)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 
ft_srio_setup(void * blob)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
153