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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / arch / ppc / platforms / 4xx / sycamore.c
blob8689f3e8ef3a35dd15026713054e2733a1577483
1 /*
2 * Architecture- / platform-specific boot-time initialization code for
3 * IBM PowerPC 4xx based boards.
4 *
5 * Author: Armin Kuster <akuster@mvista.com>
6 *
7 * 2000-2002 (c) MontaVista, Software, Inc. This file is licensed under
8 * the terms of the GNU General Public License version 2. This program
9 * is licensed "as is" without any warranty of any kind, whether express
10 * or implied.
11 */
12 #include <linux/init.h>
13 #include <linux/smp.h>
14 #include <linux/threads.h>
15 #include <linux/param.h>
16 #include <linux/string.h>
17 #include <linux/pci.h>
18 #include <linux/rtc.h>
19
20 #include <asm/ocp.h>
21 #include <asm/ppc4xx_pic.h>
22 #include <asm/system.h>
23 #include <asm/pci-bridge.h>
24 #include <asm/machdep.h>
25 #include <asm/page.h>
26 #include <asm/time.h>
27 #include <asm/io.h>
28 #include <asm/ibm_ocp_pci.h>
29 #include <asm/todc.h>
30
31 #undef DEBUG
32
33 #ifdef DEBUG
34 #define DBG(x...) printk(x)
35 #else
36 #define DBG(x...)
37 #endif
38
39 void *kb_cs;
40 void *kb_data;
41 void *sycamore_rtc_base;
42
43 /*
44 * Define external IRQ senses and polarities.
45 */
46 unsigned char ppc4xx_uic_ext_irq_cfg[] __initdata = {
47 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Ext Int 7 */
48 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Ext Int 8 */
49 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Ext Int 9 */
50 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Ext Int 10 */
51 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Ext Int 11 */
52 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Ext Int 12 */
53 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Ext Int 0 */
54 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Ext Int 1 */
55 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Ext Int 2 */
56 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Ext Int 3 */
57 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Ext Int 4 */
58 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Ext Int 5 */
59 (IRQ_SENSE_LEVEL | IRQ_POLARITY_NEGATIVE), /* Ext Int 6 */
60 };
61
62
63 /* Some IRQs unique to Sycamore.
64 * Used by the generic 405 PCI setup functions in ppc4xx_pci.c
65 */
66 int __init
67 ppc405_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
68 {
69 static char pci_irq_table[][4] =
70 /*
71 * PCI IDSEL/INTPIN->INTLINE
72 * A B C D
73 */
74 {
75 {28, 28, 28, 28}, /* IDSEL 1 - PCI slot 1 */
76 {29, 29, 29, 29}, /* IDSEL 2 - PCI slot 2 */
77 {30, 30, 30, 30}, /* IDSEL 3 - PCI slot 3 */
78 {31, 31, 31, 31}, /* IDSEL 4 - PCI slot 4 */
79 };
80
81 const long min_idsel = 1, max_idsel = 4, irqs_per_slot = 4;
82 return PCI_IRQ_TABLE_LOOKUP;
83 };
84
85 void __init
86 sycamore_setup_arch(void)
87 {
88 void *fpga_brdc;
89 unsigned char fpga_brdc_data;
90 void *fpga_enable;
91 void *fpga_polarity;
92 void *fpga_status;
93 void *fpga_trigger;
94
95 ppc4xx_setup_arch();
96
97 ibm_ocp_set_emac(0, 0);
98
99 kb_data = ioremap(SYCAMORE_PS2_BASE, 8);
100 if (!kb_data) {
101 printk(KERN_CRIT
102 "sycamore_setup_arch() kb_data ioremap failed\n");
103 return;
104 }
105
106 kb_cs = kb_data + 1;
107
108 fpga_status = ioremap(PPC40x_FPGA_BASE, 8);
109 if (!fpga_status) {
110 printk(KERN_CRIT
111 "sycamore_setup_arch() fpga_status ioremap failed\n");
112 return;
113 }
114
115 fpga_enable = fpga_status + 1;
116 fpga_polarity = fpga_status + 2;
117 fpga_trigger = fpga_status + 3;
118 fpga_brdc = fpga_status + 4;
119
120 /* split the keyboard and mouse interrupts */
121 fpga_brdc_data = readb(fpga_brdc);
122 fpga_brdc_data |= 0x80;
123 writeb(fpga_brdc_data, fpga_brdc);
124
125 writeb(0x3, fpga_enable);
126
127 writeb(0x3, fpga_polarity);
128
129 writeb(0x3, fpga_trigger);
130
131 /* RTC step for the sycamore */
132 sycamore_rtc_base = (void *) SYCAMORE_RTC_VADDR;
133 TODC_INIT(TODC_TYPE_DS1743, sycamore_rtc_base, sycamore_rtc_base,
134 sycamore_rtc_base, 8);
135
136 /* Identify the system */
137 printk(KERN_INFO "IBM Sycamore (IBM405GPr) Platform\n");
138 printk(KERN_INFO
139 "Port by MontaVista Software, Inc. (source@mvista.com)\n");
140 }
141
142 void __init
143 bios_fixup(struct pci_controller *hose, struct pcil0_regs *pcip)
144 {
145 #ifdef CONFIG_PCI
146 unsigned int bar_response, bar;
147 /*
148 * Expected PCI mapping:
149 *
150 * PLB addr PCI memory addr
151 * --------------------- ---------------------
152 * 0000'0000 - 7fff'ffff <--- 0000'0000 - 7fff'ffff
153 * 8000'0000 - Bfff'ffff ---> 8000'0000 - Bfff'ffff
154 *
155 * PLB addr PCI io addr
156 * --------------------- ---------------------
157 * e800'0000 - e800'ffff ---> 0000'0000 - 0001'0000
158 *
159 * The following code is simplified by assuming that the bootrom
160 * has been well behaved in following this mapping.
161 */
162
163 #ifdef DEBUG
164 int i;
165
166 printk("ioremap PCLIO_BASE = 0x%x\n", pcip);
167 printk("PCI bridge regs before fixup \n");
168 for (i = 0; i <= 3; i++) {
169 printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].ma)));
170 printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].la)));
171 printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].pcila)));
172 printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].pciha)));
173 }
174 printk(" ptm1ms\t0x%x\n", in_le32(&(pcip->ptm1ms)));
175 printk(" ptm1la\t0x%x\n", in_le32(&(pcip->ptm1la)));
176 printk(" ptm2ms\t0x%x\n", in_le32(&(pcip->ptm2ms)));
177 printk(" ptm2la\t0x%x\n", in_le32(&(pcip->ptm2la)));
178
179 #endif
180
181 /* added for IBM boot rom version 1.15 bios bar changes -AK */
182
183 /* Disable region first */
184 out_le32((void *) &(pcip->pmm[0].ma), 0x00000000);
185 /* PLB starting addr, PCI: 0x80000000 */
186 out_le32((void *) &(pcip->pmm[0].la), 0x80000000);
187 /* PCI start addr, 0x80000000 */
188 out_le32((void *) &(pcip->pmm[0].pcila), PPC405_PCI_MEM_BASE);
189 /* 512MB range of PLB to PCI */
190 out_le32((void *) &(pcip->pmm[0].pciha), 0x00000000);
191 /* Enable no pre-fetch, enable region */
192 out_le32((void *) &(pcip->pmm[0].ma), ((0xffffffff -
193 (PPC405_PCI_UPPER_MEM -
194 PPC405_PCI_MEM_BASE)) | 0x01));
195
196 /* Enable inbound region one - 1GB size */
197 out_le32((void *) &(pcip->ptm1ms), 0xc0000001);
198
199 /* Disable outbound region one */
200 out_le32((void *) &(pcip->pmm[1].ma), 0x00000000);
201 out_le32((void *) &(pcip->pmm[1].la), 0x00000000);
202 out_le32((void *) &(pcip->pmm[1].pcila), 0x00000000);
203 out_le32((void *) &(pcip->pmm[1].pciha), 0x00000000);
204 out_le32((void *) &(pcip->pmm[1].ma), 0x00000000);
205
206 /* Disable inbound region two */
207 out_le32((void *) &(pcip->ptm2ms), 0x00000000);
208
209 /* Disable outbound region two */
210 out_le32((void *) &(pcip->pmm[2].ma), 0x00000000);
211 out_le32((void *) &(pcip->pmm[2].la), 0x00000000);
212 out_le32((void *) &(pcip->pmm[2].pcila), 0x00000000);
213 out_le32((void *) &(pcip->pmm[2].pciha), 0x00000000);
214 out_le32((void *) &(pcip->pmm[2].ma), 0x00000000);
215
216 /* Zero config bars */
217 for (bar = PCI_BASE_ADDRESS_1; bar <= PCI_BASE_ADDRESS_2; bar += 4) {
218 early_write_config_dword(hose, hose->first_busno,
219 PCI_FUNC(hose->first_busno), bar,
220 0x00000000);
221 early_read_config_dword(hose, hose->first_busno,
222 PCI_FUNC(hose->first_busno), bar,
223 &bar_response);
224 DBG("BUS %d, device %d, Function %d bar 0x%8.8x is 0x%8.8x\n",
225 hose->first_busno, PCI_SLOT(hose->first_busno),
226 PCI_FUNC(hose->first_busno), bar, bar_response);
227 }
228 /* end workaround */
229
230 #ifdef DEBUG
231 printk("PCI bridge regs after fixup \n");
232 for (i = 0; i <= 3; i++) {
233 printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].ma)));
234 printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].la)));
235 printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].pcila)));
236 printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].pciha)));
237 }
238 printk(" ptm1ms\t0x%x\n", in_le32(&(pcip->ptm1ms)));
239 printk(" ptm1la\t0x%x\n", in_le32(&(pcip->ptm1la)));
240 printk(" ptm2ms\t0x%x\n", in_le32(&(pcip->ptm2ms)));
241 printk(" ptm2la\t0x%x\n", in_le32(&(pcip->ptm2la)));
242
243 #endif
244 #endif
245
246 }
247
248 void __init
249 sycamore_map_io(void)
250 {
251 ppc4xx_map_io();
252 io_block_mapping(SYCAMORE_RTC_VADDR,
253 SYCAMORE_RTC_PADDR, SYCAMORE_RTC_SIZE, _PAGE_IO);
254 }
255
256 void __init
257 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
258 unsigned long r6, unsigned long r7)
259 {
260 ppc4xx_init(r3, r4, r5, r6, r7);
261
262 ppc_md.setup_arch = sycamore_setup_arch;
263 ppc_md.setup_io_mappings = sycamore_map_io;
264
265 #ifdef CONFIG_GEN_RTC
266 ppc_md.time_init = todc_time_init;
267 ppc_md.set_rtc_time = todc_set_rtc_time;
268 ppc_md.get_rtc_time = todc_get_rtc_time;
269 ppc_md.nvram_read_val = todc_direct_read_val;
270 ppc_md.nvram_write_val = todc_direct_write_val;
271 #endif
272 }
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