2 * arch/ppc/platforms/4xx/walnut.c
4 * Architecture- / platform-specific boot-time initialization code for
5 * IBM PowerPC 4xx based boards. Adapted from original
6 * code by Gary Thomas, Cort Dougan <cort@fsmlabs.com>, and Dan Malek
9 * Copyright(c) 1999-2000 Grant Erickson <grant@lcse.umn.edu>
11 * 2002 (c) MontaVista, Software, Inc. This file is licensed under
12 * the terms of the GNU General Public License version 2. This program
13 * is licensed "as is" without any warranty of any kind, whether express
16 #include <linux/config.h>
17 #include <linux/init.h>
18 #include <linux/smp.h>
19 #include <linux/threads.h>
20 #include <linux/param.h>
21 #include <linux/string.h>
22 #include <linux/pci.h>
23 #include <linux/rtc.h>
25 #include <asm/system.h>
26 #include <asm/pci-bridge.h>
27 #include <asm/machdep.h>
32 #include <asm/ibm_ocp_pci.h>
38 #define DBG(x...) printk(x)
45 void *walnut_rtc_base;
47 /* Some IRQs unique to Walnut.
48 * Used by the generic 405 PCI setup functions in ppc4xx_pci.c
51 ppc405_map_irq(struct pci_dev *dev, unsigned char idsel, unsigned char pin)
53 static char pci_irq_table[][4] =
55 * PCI IDSEL/INTPIN->INTLINE
59 {28, 28, 28, 28}, /* IDSEL 1 - PCI slot 1 */
60 {29, 29, 29, 29}, /* IDSEL 2 - PCI slot 2 */
61 {30, 30, 30, 30}, /* IDSEL 3 - PCI slot 3 */
62 {31, 31, 31, 31}, /* IDSEL 4 - PCI slot 4 */
65 const long min_idsel = 1, max_idsel = 4, irqs_per_slot = 4;
66 return PCI_IRQ_TABLE_LOOKUP;
70 walnut_setup_arch(void)
74 unsigned char fpga_brdc_data;
82 ibm_ocp_set_emac(0, 0);
84 kb_data = ioremap(WALNUT_PS2_BASE, 8);
87 "walnut_setup_arch() kb_data ioremap failed\n");
93 fpga_status = ioremap(PPC40x_FPGA_BASE, 8);
96 "walnut_setup_arch() fpga_status ioremap failed\n");
100 fpga_enable = fpga_status + 1;
101 fpga_polarity = fpga_status + 2;
102 fpga_trigger = fpga_status + 3;
103 fpga_brdc = fpga_status + 4;
105 /* split the keyboard and mouse interrupts */
106 fpga_brdc_data = readb(fpga_brdc);
107 fpga_brdc_data |= 0x80;
108 writeb(fpga_brdc_data, fpga_brdc);
110 writeb(0x3, fpga_enable);
112 writeb(0x3, fpga_polarity);
114 writeb(0x3, fpga_trigger);
116 /* RTC step for the walnut */
117 walnut_rtc_base = (void *) WALNUT_RTC_VADDR;
118 TODC_INIT(TODC_TYPE_DS1743, walnut_rtc_base, walnut_rtc_base,
120 /* Identify the system */
121 printk("IBM Walnut port (C) 2000-2002 MontaVista Software, Inc. (source@mvista.com)\n");
125 bios_fixup(struct pci_controller *hose, struct pcil0_regs *pcip)
128 unsigned int bar_response, bar;
130 * Expected PCI mapping:
132 * PLB addr PCI memory addr
133 * --------------------- ---------------------
134 * 0000'0000 - 7fff'ffff <--- 0000'0000 - 7fff'ffff
135 * 8000'0000 - Bfff'ffff ---> 8000'0000 - Bfff'ffff
137 * PLB addr PCI io addr
138 * --------------------- ---------------------
139 * e800'0000 - e800'ffff ---> 0000'0000 - 0001'0000
141 * The following code is simplified by assuming that the bootrom
142 * has been well behaved in following this mapping.
148 printk("ioremap PCLIO_BASE = 0x%x\n", pcip);
149 printk("PCI bridge regs before fixup \n");
150 for (i = 0; i <= 3; i++) {
151 printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].ma)));
152 printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].la)));
153 printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].pcila)));
154 printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].pciha)));
156 printk(" ptm1ms\t0x%x\n", in_le32(&(pcip->ptm1ms)));
157 printk(" ptm1la\t0x%x\n", in_le32(&(pcip->ptm1la)));
158 printk(" ptm2ms\t0x%x\n", in_le32(&(pcip->ptm2ms)));
159 printk(" ptm2la\t0x%x\n", in_le32(&(pcip->ptm2la)));
163 /* added for IBM boot rom version 1.15 bios bar changes -AK */
165 /* Disable region first */
166 out_le32((void *) &(pcip->pmm[0].ma), 0x00000000);
167 /* PLB starting addr, PCI: 0x80000000 */
168 out_le32((void *) &(pcip->pmm[0].la), 0x80000000);
169 /* PCI start addr, 0x80000000 */
170 out_le32((void *) &(pcip->pmm[0].pcila), PPC405_PCI_MEM_BASE);
171 /* 512MB range of PLB to PCI */
172 out_le32((void *) &(pcip->pmm[0].pciha), 0x00000000);
173 /* Enable no pre-fetch, enable region */
174 out_le32((void *) &(pcip->pmm[0].ma), ((0xffffffff -
175 (PPC405_PCI_UPPER_MEM -
176 PPC405_PCI_MEM_BASE)) | 0x01));
178 /* Disable region one */
179 out_le32((void *) &(pcip->pmm[1].ma), 0x00000000);
180 out_le32((void *) &(pcip->pmm[1].la), 0x00000000);
181 out_le32((void *) &(pcip->pmm[1].pcila), 0x00000000);
182 out_le32((void *) &(pcip->pmm[1].pciha), 0x00000000);
183 out_le32((void *) &(pcip->pmm[1].ma), 0x00000000);
184 out_le32((void *) &(pcip->ptm1ms), 0x00000000);
186 /* Disable region two */
187 out_le32((void *) &(pcip->pmm[2].ma), 0x00000000);
188 out_le32((void *) &(pcip->pmm[2].la), 0x00000000);
189 out_le32((void *) &(pcip->pmm[2].pcila), 0x00000000);
190 out_le32((void *) &(pcip->pmm[2].pciha), 0x00000000);
191 out_le32((void *) &(pcip->pmm[2].ma), 0x00000000);
192 out_le32((void *) &(pcip->ptm2ms), 0x00000000);
194 /* Zero config bars */
195 for (bar = PCI_BASE_ADDRESS_1; bar <= PCI_BASE_ADDRESS_2; bar += 4) {
196 early_write_config_dword(hose, hose->first_busno,
197 PCI_FUNC(hose->first_busno), bar,
199 early_read_config_dword(hose, hose->first_busno,
200 PCI_FUNC(hose->first_busno), bar,
202 DBG("BUS %d, device %d, Function %d bar 0x%8.8x is 0x%8.8x\n",
203 hose->first_busno, PCI_SLOT(hose->first_busno),
204 PCI_FUNC(hose->first_busno), bar, bar_response);
206 /* end work arround */
209 printk("PCI bridge regs after fixup \n");
210 for (i = 0; i <= 3; i++) {
211 printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].ma)));
212 printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].la)));
213 printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].pcila)));
214 printk(" pmm%dma\t0x%x\n", i, in_le32(&(pcip->pmm[i].pciha)));
216 printk(" ptm1ms\t0x%x\n", in_le32(&(pcip->ptm1ms)));
217 printk(" ptm1la\t0x%x\n", in_le32(&(pcip->ptm1la)));
218 printk(" ptm2ms\t0x%x\n", in_le32(&(pcip->ptm2ms)));
219 printk(" ptm2la\t0x%x\n", in_le32(&(pcip->ptm2la)));
229 io_block_mapping(WALNUT_RTC_VADDR,
230 WALNUT_RTC_PADDR, WALNUT_RTC_SIZE, _PAGE_IO);
234 platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
235 unsigned long r6, unsigned long r7)
237 ppc4xx_init(r3, r4, r5, r6, r7);
239 ppc_md.setup_arch = walnut_setup_arch;
240 ppc_md.setup_io_mappings = walnut_map_io;
242 #ifdef CONFIG_GEN_RTC
243 ppc_md.time_init = todc_time_init;
244 ppc_md.set_rtc_time = todc_set_rtc_time;
245 ppc_md.get_rtc_time = todc_get_rtc_time;
246 ppc_md.nvram_read_val = todc_direct_read_val;
247 ppc_md.nvram_write_val = todc_direct_write_val;