1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Old U-boot compatibility for Esteem 195E Hotfoot CPU Board
4  *
5  * Author: Solomon Peachy <solomon@linux-wlan.com>
6  */
7 
8 #include "ops.h"
9 #include "stdio.h"
10 #include "reg.h"
11 #include "dcr.h"
12 #include "4xx.h"
13 #include "cuboot.h"
14 
15 #define TARGET_4xx
16 #define TARGET_HOTFOOT
17 
18 #include "ppcboot-hotfoot.h"
19 
20 static bd_t bd;
21 
22 #define NUM_REGS 3
23 
24 static void hotfoot_fixups(void)
25 {
26 	u32 uart = mfdcr(DCRN_CPC0_UCR) & 0x7f;
27 
28 	dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
29 
30 	dt_fixup_cpu_clocks(bd.bi_procfreq, bd.bi_procfreq, 0);
31 	dt_fixup_clock("/plb", bd.bi_plb_busfreq);
32 	dt_fixup_clock("/plb/opb", bd.bi_opbfreq);
33 	dt_fixup_clock("/plb/ebc", bd.bi_pci_busfreq);
34 	dt_fixup_clock("/plb/opb/serial@ef600300", bd.bi_procfreq / uart);
35 	dt_fixup_clock("/plb/opb/serial@ef600400", bd.bi_procfreq / uart);
36 
37 	dt_fixup_mac_address_by_alias("ethernet0", bd.bi_enetaddr);
38 	dt_fixup_mac_address_by_alias("ethernet1", bd.bi_enet1addr);
39 
40 	/* Is this a single eth/serial board? */
41 	if ((bd.bi_enet1addr[0] == 0) &&
42 	    (bd.bi_enet1addr[1] == 0) &&
43 	    (bd.bi_enet1addr[2] == 0) &&
44 	    (bd.bi_enet1addr[3] == 0) &&
45 	    (bd.bi_enet1addr[4] == 0) &&
46 	    (bd.bi_enet1addr[5] == 0)) {
47 		void *devp;
48 
49 		printf("Trimming devtree for single serial/eth board\n");
50 
51 		devp = finddevice("/plb/opb/serial@ef600300");
52 		if (!devp)
53 			fatal("Can't find node for /plb/opb/serial@ef600300");
54 		del_node(devp);
55 
56 		devp = finddevice("/plb/opb/ethernet@ef600900");
57 		if (!devp)
58 			fatal("Can't find node for /plb/opb/ethernet@ef600900");
59 		del_node(devp);
60 	}
61 
62 	ibm4xx_quiesce_eth((u32 *)0xef600800, (u32 *)0xef600900);
63 
64 	/* Fix up flash size in fdt for 4M boards. */
65 	if (bd.bi_flashsize < 0x800000) {
66 		u32 regs[NUM_REGS];
67 		void *devp = finddevice("/plb/ebc/nor_flash@0");
68 		if (!devp)
69 			fatal("Can't find FDT node for nor_flash!??");
70 
71 		printf("Fixing devtree for 4M Flash\n");
72 
73 		/* First fix up the base address */
74 		getprop(devp, "reg", regs, sizeof(regs));
75 		regs[0] = 0;
76 		regs[1] = 0xffc00000;
77 		regs[2] = 0x00400000;
78 		setprop(devp, "reg", regs, sizeof(regs));
79 
80 		/* Then the offsets */
81 		devp = finddevice("/plb/ebc/nor_flash@0/partition@0");
82 		if (!devp)
83 			fatal("Can't find FDT node for partition@0");
84 		getprop(devp, "reg", regs, 2*sizeof(u32));
85 		regs[0] -= 0x400000;
86 		setprop(devp, "reg", regs,  2*sizeof(u32));
87 
88 		devp = finddevice("/plb/ebc/nor_flash@0/partition@1");
89 		if (!devp)
90 			fatal("Can't find FDT node for partition@1");
91 		getprop(devp, "reg", regs, 2*sizeof(u32));
92 		regs[0] -= 0x400000;
93 		setprop(devp, "reg", regs,  2*sizeof(u32));
94 
95 		devp = finddevice("/plb/ebc/nor_flash@0/partition@2");
96 		if (!devp)
97 			fatal("Can't find FDT node for partition@2");
98 		getprop(devp, "reg", regs, 2*sizeof(u32));
99 		regs[0] -= 0x400000;
100 		setprop(devp, "reg", regs,  2*sizeof(u32));
101 
102 		devp = finddevice("/plb/ebc/nor_flash@0/partition@3");
103 		if (!devp)
104 			fatal("Can't find FDT node for partition@3");
105 		getprop(devp, "reg", regs, 2*sizeof(u32));
106 		regs[0] -= 0x400000;
107 		setprop(devp, "reg", regs,  2*sizeof(u32));
108 
109 		devp = finddevice("/plb/ebc/nor_flash@0/partition@4");
110 		if (!devp)
111 			fatal("Can't find FDT node for partition@4");
112 		getprop(devp, "reg", regs, 2*sizeof(u32));
113 		regs[0] -= 0x400000;
114 		setprop(devp, "reg", regs,  2*sizeof(u32));
115 
116 		devp = finddevice("/plb/ebc/nor_flash@0/partition@6");
117 		if (!devp)
118 			fatal("Can't find FDT node for partition@6");
119 		getprop(devp, "reg", regs, 2*sizeof(u32));
120 		regs[0] -= 0x400000;
121 		setprop(devp, "reg", regs,  2*sizeof(u32));
122 
123 		/* Delete the FeatFS node */
124 		devp = finddevice("/plb/ebc/nor_flash@0/partition@5");
125 		if (!devp)
126 			fatal("Can't find FDT node for partition@5");
127 		del_node(devp);
128 	}
129 }
130 
131 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
132 		   unsigned long r6, unsigned long r7)
133 {
134 	CUBOOT_INIT();
135 	platform_ops.fixups = hotfoot_fixups;
136         platform_ops.exit = ibm40x_dbcr_reset;
137 	fdt_init(_dtb_start);
138 	serial_console_init();
139 }
140