1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
|
/*
* arch/ppc/platforms/4xx/walnut.c
*
* Architecture- / platform-specific boot-time initialization code for
* IBM PowerPC 4xx based boards. Adapted from original
* code by Gary Thomas, Cort Dougan <cort@fsmlabs.com>, and Dan Malek
* <dan@net4x.com>.
*
* Copyright(c) 1999-2000 Grant Erickson <grant@lcse.umn.edu>
*
* 2002 (c) MontaVista, Software, Inc. This file is licensed under
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
*/
#include <linux/config.h>
#include <linux/init.h>
#include <linux/smp.h>
#include <linux/threads.h>
#include <linux/param.h>
#include <linux/string.h>
#include <linux/pci.h>
#include <linux/rtc.h>
#include <asm/system.h>
#include <asm/pci-bridge.h>
#include <asm/machdep.h>
#include <asm/page.h>
#include <asm/time.h>
#include <asm/io.h>
#include <asm/ocp.h>
#include <asm/ibm_ocp_pci.h>
#include <asm/todc.h>
#undef DEBUG
#ifdef DEBUG
#define DBG(x...) printk(x)
#else
#define DBG(x...)
#endif
void *kb_cs;
void *kb_data;
void *walnut_rtc_base;
/* Some IRQs unique to Walnut.
* Used by the generic 405 PCI setup functions in ppc4xx_pci.c
*/
int __init
ppc405_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
{
static char pci_irq_table[][4] =
/*
* PCI IDSEL/INTPIN->INTLINE
* A B C D
*/
{
{28, 28, 28, 28}, /* IDSEL 1 - PCI slot 1 */
{29, 29, 29, 29}, /* IDSEL 2 - PCI slot 2 */
{30, 30, 30, 30}, /* IDSEL 3 - PCI slot 3 */
{31, 31, 31, 31}, /* IDSEL 4 - PCI slot 4 */
};
const long min_idsel = 1, max_idsel = 4, irqs_per_slot = 4;
return PCI_IRQ_TABLE_LOOKUP;
};
void __init
walnut_setup_arch(void)
{
void *fpga_brdc;
unsigned char fpga_brdc_data;
void *fpga_enable;
void *fpga_polarity;
void *fpga_status;
void *fpga_trigger;
ppc4xx_setup_arch();
ibm_ocp_set_emac(0, 0);
kb_data = ioremap(WALNUT_PS2_BASE, 8);
if (!kb_data) {
printk(KERN_CRIT
"walnut_setup_arch() kb_data ioremap failed\n");
return;
}
kb_cs = kb_data + 1;
fpga_status = ioremap(WALNUT_FPGA_BASE, 8);
if (!fpga_status) {
printk(KERN_CRIT
"walnut_setup_arch() fpga_status ioremap failed\n");
return;
}
fpga_enable = fpga_status + 1;
fpga_polarity = fpga_status + 2;
fpga_trigger = fpga_status + 3;
fpga_brdc = fpga_status + 4;
/* split the keyboard and mouse interrupts */
fpga_brdc_data = readb(fpga_brdc);
fpga_brdc_data |= 0x80;
writeb(fpga_brdc_data, fpga_brdc);
writeb(0x3, fpga_enable);
writeb(0x3, fpga_polarity);
writeb(0x3, fpga_trigger);
/* RTC step for the walnut */
walnut_rtc_base = (void *) WALNUT_RTC_VADDR;
TODC_INIT(TODC_TYPE_DS1743, walnut_rtc_base, walnut_rtc_base,
walnut_rtc_base, 8);
/* Identify the system */
printk("IBM Walnut port (C) 2000-2002 MontaVista Software, Inc. (source@mvista.com)\n");
}
void __init
bios_fixup(struct pci_controller *hose, struct pcil0_regs *pcip)
{
#ifdef CONFIG_PCI
unsigned int bar_response, bar;
/*
* Expected PCI mapping:
*
* PLB addr PCI memory addr
* --------------------- ---------------------
* 0000'0000 - 7fff'ffff <--- 0000'0000 - 7fff'ffff
* 8000'0000 - Bfff'ffff ---> 8000'0000 - Bfff'ffff
*
* PLB addr PCI io addr
* --------------------- ---------------------
* e800'0000 - e800'ffff ---> 0000'0000 - 0001'0000
*
* The following code is simplified by assuming that the bootrom
* has been well behaved in following this mapping.
*/
#ifdef DEBUG
int i;
printk("ioremap PCLIO_BASE = 0x%x\n", pcip);
printk("PCI bridge regs before fixup \n");
for (i = 0; i <= 3; i++) {
printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].ma)));
printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].la)));
printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].pcila)));
printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].pciha)));
}
printk(" ptm1ms\t0x%x\n", in_le32(&(pcip->ptm1ms)));
printk(" ptm1la\t0x%x\n", in_le32(&(pcip->ptm1la)));
printk(" ptm2ms\t0x%x\n", in_le32(&(pcip->ptm2ms)));
printk(" ptm2la\t0x%x\n", in_le32(&(pcip->ptm2la)));
#endif
/* added for IBM boot rom version 1.15 bios bar changes -AK */
/* Disable region first */
out_le32((void *) &(pcip->pmm[0].ma), 0x00000000);
/* PLB starting addr, PCI: 0x80000000 */
out_le32((void *) &(pcip->pmm[0].la), 0x80000000);
/* PCI start addr, 0x80000000 */
out_le32((void *) &(pcip->pmm[0].pcila), PPC405_PCI_MEM_BASE);
/* 512MB range of PLB to PCI */
out_le32((void *) &(pcip->pmm[0].pciha), 0x00000000);
/* Enable no pre-fetch, enable region */
out_le32((void *) &(pcip->pmm[0].ma), ((0xffffffff -
(PPC405_PCI_UPPER_MEM -
PPC405_PCI_MEM_BASE)) | 0x01));
/* Disable region one */
out_le32((void *) &(pcip->pmm[1].ma), 0x00000000);
out_le32((void *) &(pcip->pmm[1].la), 0x00000000);
out_le32((void *) &(pcip->pmm[1].pcila), 0x00000000);
out_le32((void *) &(pcip->pmm[1].pciha), 0x00000000);
out_le32((void *) &(pcip->pmm[1].ma), 0x00000000);
out_le32((void *) &(pcip->ptm1ms), 0x00000000);
/* Disable region two */
out_le32((void *) &(pcip->pmm[2].ma), 0x00000000);
out_le32((void *) &(pcip->pmm[2].la), 0x00000000);
out_le32((void *) &(pcip->pmm[2].pcila), 0x00000000);
out_le32((void *) &(pcip->pmm[2].pciha), 0x00000000);
out_le32((void *) &(pcip->pmm[2].ma), 0x00000000);
out_le32((void *) &(pcip->ptm2ms), 0x00000000);
/* Zero config bars */
for (bar = PCI_BASE_ADDRESS_1; bar <= PCI_BASE_ADDRESS_2; bar += 4) {
early_write_config_dword(hose, hose->first_busno,
PCI_FUNC(hose->first_busno), bar,
0x00000000);
early_read_config_dword(hose, hose->first_busno,
PCI_FUNC(hose->first_busno), bar,
&bar_response);
DBG("BUS %d, device %d, Function %d bar 0x%8.8x is 0x%8.8x\n",
hose->first_busno, PCI_SLOT(hose->first_busno),
PCI_FUNC(hose->first_busno), bar, bar_response);
}
/* end work arround */
#ifdef DEBUG
printk("PCI bridge regs after fixup \n");
for (i = 0; i <= 3; i++) {
printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].ma)));
printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].la)));
printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].pcila)));
printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].pciha)));
}
printk(" ptm1ms\t0x%x\n", in_le32(&(pcip->ptm1ms)));
printk(" ptm1la\t0x%x\n", in_le32(&(pcip->ptm1la)));
printk(" ptm2ms\t0x%x\n", in_le32(&(pcip->ptm2ms)));
printk(" ptm2la\t0x%x\n", in_le32(&(pcip->ptm2la)));
#endif
#endif
}
void __init
walnut_map_io(void)
{
ppc4xx_map_io();
io_block_mapping(WALNUT_RTC_VADDR,
WALNUT_RTC_PADDR, WALNUT_RTC_SIZE, _PAGE_IO);
}
void __init
platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
ppc4xx_init(r3, r4, r5, r6, r7);
ppc_md.setup_arch = walnut_setup_arch;
ppc_md.setup_io_mappings = walnut_map_io;
#ifdef CONFIG_GEN_RTC
ppc_md.time_init = todc_time_init;
ppc_md.set_rtc_time = todc_set_rtc_time;
ppc_md.get_rtc_time = todc_get_rtc_time;
ppc_md.nvram_read_val = todc_direct_read_val;
ppc_md.nvram_write_val = todc_direct_write_val;
#endif
}
|
