1 /*
2  * Old U-boot compatibility for Esteem 195E Hotfoot CPU Board
3  *
4  * Author: Solomon Peachy <solomon@linux-wlan.com>
5  *
6  * This program is free software; you can redistribute it and/or modify it
7  * under the terms of the GNU General Public License version 2 as published
8  * by the Free Software Foundation.
9  */
10 
11 #include "ops.h"
12 #include "stdio.h"
13 #include "reg.h"
14 #include "dcr.h"
15 #include "4xx.h"
16 #include "cuboot.h"
17 
18 #define TARGET_4xx
19 #define TARGET_HOTFOOT
20 
21 #include "ppcboot-hotfoot.h"
22 
23 static bd_t bd;
24 
25 #define NUM_REGS 3
26 
hotfoot_fixups(void)27 static void hotfoot_fixups(void)
28 {
29 	u32 uart = mfdcr(DCRN_CPC0_UCR) & 0x7f;
30 
31 	dt_fixup_memory(bd.bi_memstart, bd.bi_memsize);
32 
33 	dt_fixup_cpu_clocks(bd.bi_procfreq, bd.bi_procfreq, 0);
34 	dt_fixup_clock("/plb", bd.bi_plb_busfreq);
35 	dt_fixup_clock("/plb/opb", bd.bi_opbfreq);
36 	dt_fixup_clock("/plb/ebc", bd.bi_pci_busfreq);
37 	dt_fixup_clock("/plb/opb/serial@ef600300", bd.bi_procfreq / uart);
38 	dt_fixup_clock("/plb/opb/serial@ef600400", bd.bi_procfreq / uart);
39 
40 	dt_fixup_mac_address_by_alias("ethernet0", bd.bi_enetaddr);
41 	dt_fixup_mac_address_by_alias("ethernet1", bd.bi_enet1addr);
42 
43 	/* Is this a single eth/serial board? */
44 	if ((bd.bi_enet1addr[0] == 0) &&
45 	    (bd.bi_enet1addr[1] == 0) &&
46 	    (bd.bi_enet1addr[2] == 0) &&
47 	    (bd.bi_enet1addr[3] == 0) &&
48 	    (bd.bi_enet1addr[4] == 0) &&
49 	    (bd.bi_enet1addr[5] == 0)) {
50 		void *devp;
51 
52 		printf("Trimming devtree for single serial/eth board\n");
53 
54 		devp = finddevice("/plb/opb/serial@ef600300");
55 		if (!devp)
56 			fatal("Can't find node for /plb/opb/serial@ef600300");
57 		del_node(devp);
58 
59 		devp = finddevice("/plb/opb/ethernet@ef600900");
60 		if (!devp)
61 			fatal("Can't find node for /plb/opb/ethernet@ef600900");
62 		del_node(devp);
63 	}
64 
65 	ibm4xx_quiesce_eth((u32 *)0xef600800, (u32 *)0xef600900);
66 
67 	/* Fix up flash size in fdt for 4M boards. */
68 	if (bd.bi_flashsize < 0x800000) {
69 		u32 regs[NUM_REGS];
70 		void *devp = finddevice("/plb/ebc/nor_flash@0");
71 		if (!devp)
72 			fatal("Can't find FDT node for nor_flash!??");
73 
74 		printf("Fixing devtree for 4M Flash\n");
75 
76 		/* First fix up the base addresse */
77 		getprop(devp, "reg", regs, sizeof(regs));
78 		regs[0] = 0;
79 		regs[1] = 0xffc00000;
80 		regs[2] = 0x00400000;
81 		setprop(devp, "reg", regs, sizeof(regs));
82 
83 		/* Then the offsets */
84 		devp = finddevice("/plb/ebc/nor_flash@0/partition@0");
85 		if (!devp)
86 			fatal("Can't find FDT node for partition@0");
87 		getprop(devp, "reg", regs, 2*sizeof(u32));
88 		regs[0] -= 0x400000;
89 		setprop(devp, "reg", regs,  2*sizeof(u32));
90 
91 		devp = finddevice("/plb/ebc/nor_flash@0/partition@1");
92 		if (!devp)
93 			fatal("Can't find FDT node for partition@1");
94 		getprop(devp, "reg", regs, 2*sizeof(u32));
95 		regs[0] -= 0x400000;
96 		setprop(devp, "reg", regs,  2*sizeof(u32));
97 
98 		devp = finddevice("/plb/ebc/nor_flash@0/partition@2");
99 		if (!devp)
100 			fatal("Can't find FDT node for partition@2");
101 		getprop(devp, "reg", regs, 2*sizeof(u32));
102 		regs[0] -= 0x400000;
103 		setprop(devp, "reg", regs,  2*sizeof(u32));
104 
105 		devp = finddevice("/plb/ebc/nor_flash@0/partition@3");
106 		if (!devp)
107 			fatal("Can't find FDT node for partition@3");
108 		getprop(devp, "reg", regs, 2*sizeof(u32));
109 		regs[0] -= 0x400000;
110 		setprop(devp, "reg", regs,  2*sizeof(u32));
111 
112 		devp = finddevice("/plb/ebc/nor_flash@0/partition@4");
113 		if (!devp)
114 			fatal("Can't find FDT node for partition@4");
115 		getprop(devp, "reg", regs, 2*sizeof(u32));
116 		regs[0] -= 0x400000;
117 		setprop(devp, "reg", regs,  2*sizeof(u32));
118 
119 		devp = finddevice("/plb/ebc/nor_flash@0/partition@6");
120 		if (!devp)
121 			fatal("Can't find FDT node for partition@6");
122 		getprop(devp, "reg", regs, 2*sizeof(u32));
123 		regs[0] -= 0x400000;
124 		setprop(devp, "reg", regs,  2*sizeof(u32));
125 
126 		/* Delete the FeatFS node */
127 		devp = finddevice("/plb/ebc/nor_flash@0/partition@5");
128 		if (!devp)
129 			fatal("Can't find FDT node for partition@5");
130 		del_node(devp);
131 	}
132 }
133 
platform_init(unsigned long r3,unsigned long r4,unsigned long r5,unsigned long r6,unsigned long r7)134 void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
135 		   unsigned long r6, unsigned long r7)
136 {
137 	CUBOOT_INIT();
138 	platform_ops.fixups = hotfoot_fixups;
139         platform_ops.exit = ibm40x_dbcr_reset;
140 	fdt_init(_dtb_start);
141 	serial_console_init();
142 }
143