/* * * Copyrigh t(c) 1999-2000 Grant Erickson * * Copyright 2000-2002 MontaVista Software Inc. * Completed implementation. * Author: MontaVista Software, Inc. * * Module name: walnut.c * * Description: * Architecture- / platform-specific boot-time initialization code for * IBM PowerPC 4xx based boards. Adapted from original * code by Gary Thomas, Cort Dougan , and Dan Malek * . * * Please read the COPYING file for all license details. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #undef DEBUG #ifdef DEBUG #define DBG(x...) printk(x) #else #define DBG(x...) #endif void *kb_cs; void *kb_data; void *walnut_rtc_base; #ifdef CONFIG_PCI /* 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; }; #endif void __init board_setup_arch(void) { #define WALNUT_PS2_BASE 0xF0100000 #define WALNUT_FPGA_BASE 0xF0300000 void *fpga_brdc; unsigned char fpga_brdc_data; void *fpga_enable; void *fpga_polarity; void *fpga_status; void *fpga_trigger; 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"); } #ifdef CONFIG_PCI void __init bios_fixup(struct pci_controller *hose, struct pcil0_regs *pcip) { 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 board_io_mapping(void) { io_block_mapping(WALNUT_RTC_VADDR, WALNUT_RTC_PADDR, WALNUT_RTC_SIZE, _PAGE_IO); } void __init board_setup_irq(void) { } void __init board_init(void) { 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; }