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[karo-tx-uboot.git] / arch / powerpc / cpu / ppc4xx / fdt.c
1 /*
2  * (C) Copyright 2007-2008
3  * Stefan Roese, DENX Software Engineering, sr@denx.de.
4  *
5  * SPDX-License-Identifier:     GPL-2.0+
6  */
7
8 #include <common.h>
9 #include <watchdog.h>
10 #include <command.h>
11 #include <asm/cache.h>
12 #include <asm/ppc4xx.h>
13
14 #if defined(CONFIG_OF_LIBFDT) && defined(CONFIG_OF_BOARD_SETUP)
15 #include <libfdt.h>
16 #include <fdt_support.h>
17 #include <asm/4xx_pcie.h>
18
19 DECLARE_GLOBAL_DATA_PTR;
20
21 int __ft_board_setup(void *blob, bd_t *bd)
22 {
23         int rc;
24         int i;
25         u32 bxcr;
26         u32 ranges[EBC_NUM_BANKS * 4];
27         u32 *p = ranges;
28         char ebc_path[] = "/plb/opb/ebc";
29
30         ft_cpu_setup(blob, bd);
31
32         /*
33          * Read 4xx EBC bus bridge registers to get mappings of the
34          * peripheral banks into the OPB/PLB address space
35          */
36         for (i = 0; i < EBC_NUM_BANKS; i++) {
37                 mtdcr(EBC0_CFGADDR, EBC_BXCR(i));
38                 bxcr = mfdcr(EBC0_CFGDATA);
39
40                 if ((bxcr & EBC_BXCR_BU_MASK) != EBC_BXCR_BU_NONE) {
41                         *p++ = i;
42                         *p++ = 0;
43                         *p++ = bxcr & EBC_BXCR_BAS_MASK;
44                         *p++ = EBC_BXCR_BANK_SIZE(bxcr);
45                 }
46         }
47
48
49 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
50         /* Update reg property in all nor flash nodes too */
51         fdt_fixup_nor_flash_size(blob);
52 #endif
53
54         /* Some 405 PPC's have EBC as direct PLB child in the dts */
55         if (fdt_path_offset(blob, ebc_path) < 0)
56                 strcpy(ebc_path, "/plb/ebc");
57         rc = fdt_find_and_setprop(blob, ebc_path, "ranges", ranges,
58                                   (p - ranges) * sizeof(u32), 1);
59         if (rc) {
60                 printf("Unable to update property EBC mappings, err=%s\n",
61                        fdt_strerror(rc));
62         }
63
64         return 0;
65 }
66 int ft_board_setup(void *blob, bd_t *bd)
67                 __attribute__((weak, alias("__ft_board_setup")));
68
69 /*
70  * Fixup all PCIe nodes by setting the device_type property
71  * to "pci-endpoint" instead is "pci" for endpoint ports.
72  * This property will get checked later by the Linux driver
73  * to properly configure the PCIe port in Linux (again).
74  */
75 void fdt_pcie_setup(void *blob)
76 {
77         const char *compat = "ibm,plb-pciex";
78         const char *prop = "device_type";
79         const char *prop_val = "pci-endpoint";
80         const u32 *port;
81         int no;
82         int rc;
83
84         /* Search first PCIe node */
85         no = fdt_node_offset_by_compatible(blob, -1, compat);
86         while (no != -FDT_ERR_NOTFOUND) {
87                 port = fdt_getprop(blob, no, "port", NULL);
88                 if (port == NULL) {
89                         printf("WARNING: could not find port property\n");
90                 } else {
91                         if (is_end_point(*port)) {
92                                 rc = fdt_setprop(blob, no, prop, prop_val,
93                                                  strlen(prop_val) + 1);
94                                 if (rc < 0)
95                                         printf("WARNING: could not set %s for %s: %s.\n",
96                                                prop, compat, fdt_strerror(rc));
97                         }
98                 }
99
100                 /* Jump to next PCIe node */
101                 no = fdt_node_offset_by_compatible(blob, no, compat);
102         }
103 }
104
105 void ft_cpu_setup(void *blob, bd_t *bd)
106 {
107         sys_info_t sys_info;
108         int off, ndepth = 0;
109
110         get_sys_info(&sys_info);
111
112         do_fixup_by_prop_u32(blob, "device_type", "cpu", 4, "timebase-frequency",
113                              bd->bi_intfreq, 1);
114         do_fixup_by_prop_u32(blob, "device_type", "cpu", 4, "clock-frequency",
115                              bd->bi_intfreq, 1);
116         do_fixup_by_path_u32(blob, "/plb", "clock-frequency", sys_info.freqPLB, 1);
117         do_fixup_by_path_u32(blob, "/plb/opb", "clock-frequency", sys_info.freqOPB, 1);
118
119         if (fdt_path_offset(blob, "/plb/opb/ebc") >= 0)
120                 do_fixup_by_path_u32(blob, "/plb/opb/ebc", "clock-frequency",
121                         sys_info.freqEBC, 1);
122         else
123                 do_fixup_by_path_u32(blob, "/plb/ebc", "clock-frequency",
124                         sys_info.freqEBC, 1);
125
126         fdt_fixup_memory(blob, (u64)bd->bi_memstart, (u64)bd->bi_memsize);
127
128         /*
129          * Fixup all UART clocks for CPU internal UARTs
130          * (only these UARTs are definitely clocked by gd->arch.uart_clk)
131          *
132          * These UARTs are direct childs of /plb/opb. This code
133          * does not touch any UARTs that are connected to the ebc.
134          */
135         off = fdt_path_offset(blob, "/plb/opb");
136         while ((off = fdt_next_node(blob, off, &ndepth)) >= 0) {
137                 /*
138                  * process all sub nodes and stop when we are back
139                  * at the starting depth
140                  */
141                 if (ndepth <= 0)
142                         break;
143
144                 /* only update direct childs */
145                 if ((ndepth == 1) &&
146                     (fdt_node_check_compatible(blob, off, "ns16550") == 0))
147                         fdt_setprop(blob, off,
148                                     "clock-frequency",
149                                     (void *)&gd->arch.uart_clk, 4);
150         }
151
152         /*
153          * Fixup all ethernet nodes
154          * Note: aliases in the dts are required for this
155          */
156         fdt_fixup_ethernet(blob);
157
158         /*
159          * Fixup all available PCIe nodes by setting the device_type property
160          */
161         fdt_pcie_setup(blob);
162 }
163 #endif /* CONFIG_OF_LIBFDT && CONFIG_OF_BOARD_SETUP */