Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6
[linux-2.6] / arch / powerpc / boot / treeboot-walnut.c
1 /*
2  * Old U-boot compatibility for Walnut
3  *
4  * Author: Josh Boyer <jwboyer@linux.vnet.ibm.com>
5  *
6  * Copyright 2007 IBM Corporation
7  *   Based on cuboot-83xx.c, which is:
8  * Copyright (c) 2007 Freescale Semiconductor, Inc.
9  *
10  * This program is free software; you can redistribute it and/or modify it
11  * under the terms of the GNU General Public License version 2 as published
12  * by the Free Software Foundation.
13  */
14
15 #include "ops.h"
16 #include "stdio.h"
17 #include "dcr.h"
18 #include "4xx.h"
19 #include "io.h"
20
21 BSS_STACK(4096);
22
23 static void walnut_flashsel_fixup(void)
24 {
25         void *devp, *sram;
26         u32 reg_flash[3] = {0x0, 0x0, 0x80000};
27         u32 reg_sram[3] = {0x0, 0x0, 0x80000};
28         u8 *fpga;
29         u8 fpga_brds1 = 0x0;
30
31         devp = finddevice("/plb/ebc/fpga");
32         if (!devp)
33                 fatal("Couldn't locate FPGA node\n\r");
34
35         if (getprop(devp, "virtual-reg", &fpga, sizeof(fpga)) != sizeof(fpga))
36                 fatal("no virtual-reg property\n\r");
37
38         fpga_brds1 = in_8(fpga);
39
40         devp = finddevice("/plb/ebc/flash");
41         if (!devp)
42                 fatal("Couldn't locate flash node\n\r");
43
44         if (getprop(devp, "reg", reg_flash, sizeof(reg_flash)) != sizeof(reg_flash))
45                 fatal("flash reg property has unexpected size\n\r");
46
47         sram = finddevice("/plb/ebc/sram");
48         if (!sram)
49                 fatal("Couldn't locate sram node\n\r");
50
51         if (getprop(sram, "reg", reg_sram, sizeof(reg_sram)) != sizeof(reg_sram))
52                 fatal("sram reg property has unexpected size\n\r");
53
54         if (fpga_brds1 & 0x1) {
55                 reg_flash[1] ^= 0x80000;
56                 reg_sram[1] ^= 0x80000;
57         }
58
59         setprop(devp, "reg", reg_flash, sizeof(reg_flash));
60         setprop(sram, "reg", reg_sram, sizeof(reg_sram));
61 }
62
63 #define WALNUT_OPENBIOS_MAC_OFF 0xfffffe0b
64 static void walnut_fixups(void)
65 {
66         ibm4xx_sdram_fixup_memsize();
67         ibm405gp_fixup_clocks(33330000, 0xa8c000);
68         ibm4xx_quiesce_eth((u32 *)0xef600800, NULL);
69         ibm4xx_fixup_ebc_ranges("/plb/ebc");
70         walnut_flashsel_fixup();
71         dt_fixup_mac_addresses((u8 *) WALNUT_OPENBIOS_MAC_OFF);
72 }
73
74 void platform_init(void)
75 {
76         unsigned long end_of_ram = 0x2000000;
77         unsigned long avail_ram = end_of_ram - (unsigned long) _end;
78
79         simple_alloc_init(_end, avail_ram, 32, 32);
80         platform_ops.fixups = walnut_fixups;
81         platform_ops.exit = ibm40x_dbcr_reset;
82         fdt_init(_dtb_start);
83         serial_console_init();
84 }