1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright 2007 David Gibson, IBM Corporation.
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Based on earlier code:
6*4882a593Smuzhiyun * Copyright (C) Paul Mackerras 1997.
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * Matt Porter <mporter@kernel.crashing.org>
9*4882a593Smuzhiyun * Copyright 2002-2005 MontaVista Software Inc.
10*4882a593Smuzhiyun *
11*4882a593Smuzhiyun * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
12*4882a593Smuzhiyun * Copyright (c) 2003, 2004 Zultys Technologies
13*4882a593Smuzhiyun */
14*4882a593Smuzhiyun #include <stdarg.h>
15*4882a593Smuzhiyun #include <stddef.h>
16*4882a593Smuzhiyun #include "types.h"
17*4882a593Smuzhiyun #include "elf.h"
18*4882a593Smuzhiyun #include "string.h"
19*4882a593Smuzhiyun #include "stdio.h"
20*4882a593Smuzhiyun #include "page.h"
21*4882a593Smuzhiyun #include "ops.h"
22*4882a593Smuzhiyun #include "reg.h"
23*4882a593Smuzhiyun #include "io.h"
24*4882a593Smuzhiyun #include "dcr.h"
25*4882a593Smuzhiyun #include "4xx.h"
26*4882a593Smuzhiyun #include "44x.h"
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun static u8 *ebony_mac0, *ebony_mac1;
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun #define EBONY_FPGA_PATH "/plb/opb/ebc/fpga"
31*4882a593Smuzhiyun #define EBONY_FPGA_FLASH_SEL 0x01
32*4882a593Smuzhiyun #define EBONY_SMALL_FLASH_PATH "/plb/opb/ebc/small-flash"
33*4882a593Smuzhiyun
ebony_flashsel_fixup(void)34*4882a593Smuzhiyun static void ebony_flashsel_fixup(void)
35*4882a593Smuzhiyun {
36*4882a593Smuzhiyun void *devp;
37*4882a593Smuzhiyun u32 reg[3] = {0x0, 0x0, 0x80000};
38*4882a593Smuzhiyun u8 *fpga;
39*4882a593Smuzhiyun u8 fpga_reg0 = 0x0;
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun devp = finddevice(EBONY_FPGA_PATH);
42*4882a593Smuzhiyun if (!devp)
43*4882a593Smuzhiyun fatal("Couldn't locate FPGA node %s\n\r", EBONY_FPGA_PATH);
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun if (getprop(devp, "virtual-reg", &fpga, sizeof(fpga)) != sizeof(fpga))
46*4882a593Smuzhiyun fatal("%s has missing or invalid virtual-reg property\n\r",
47*4882a593Smuzhiyun EBONY_FPGA_PATH);
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun fpga_reg0 = in_8(fpga);
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun devp = finddevice(EBONY_SMALL_FLASH_PATH);
52*4882a593Smuzhiyun if (!devp)
53*4882a593Smuzhiyun fatal("Couldn't locate small flash node %s\n\r",
54*4882a593Smuzhiyun EBONY_SMALL_FLASH_PATH);
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun if (getprop(devp, "reg", reg, sizeof(reg)) != sizeof(reg))
57*4882a593Smuzhiyun fatal("%s has reg property of unexpected size\n\r",
58*4882a593Smuzhiyun EBONY_SMALL_FLASH_PATH);
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun /* Invert address bit 14 (IBM-endian) if FLASH_SEL fpga bit is set */
61*4882a593Smuzhiyun if (fpga_reg0 & EBONY_FPGA_FLASH_SEL)
62*4882a593Smuzhiyun reg[1] ^= 0x80000;
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun setprop(devp, "reg", reg, sizeof(reg));
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun
ebony_fixups(void)67*4882a593Smuzhiyun static void ebony_fixups(void)
68*4882a593Smuzhiyun {
69*4882a593Smuzhiyun // FIXME: sysclk should be derived by reading the FPGA registers
70*4882a593Smuzhiyun unsigned long sysclk = 33000000;
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun ibm440gp_fixup_clocks(sysclk, 6 * 1843200);
73*4882a593Smuzhiyun ibm4xx_sdram_fixup_memsize();
74*4882a593Smuzhiyun dt_fixup_mac_address_by_alias("ethernet0", ebony_mac0);
75*4882a593Smuzhiyun dt_fixup_mac_address_by_alias("ethernet1", ebony_mac1);
76*4882a593Smuzhiyun ibm4xx_fixup_ebc_ranges("/plb/opb/ebc");
77*4882a593Smuzhiyun ebony_flashsel_fixup();
78*4882a593Smuzhiyun }
79*4882a593Smuzhiyun
ebony_init(void * mac0,void * mac1)80*4882a593Smuzhiyun void ebony_init(void *mac0, void *mac1)
81*4882a593Smuzhiyun {
82*4882a593Smuzhiyun platform_ops.fixups = ebony_fixups;
83*4882a593Smuzhiyun platform_ops.exit = ibm44x_dbcr_reset;
84*4882a593Smuzhiyun ebony_mac0 = mac0;
85*4882a593Smuzhiyun ebony_mac1 = mac1;
86*4882a593Smuzhiyun fdt_init(_dtb_start);
87*4882a593Smuzhiyun serial_console_init();
88*4882a593Smuzhiyun }
89