11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * linux/arch/arm/mach-footbridge/common.c 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (C) 1998-2000 Russell King, Dave Gilbert. 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify 71da177e4SLinus Torvalds * it under the terms of the GNU General Public License version 2 as 81da177e4SLinus Torvalds * published by the Free Software Foundation. 91da177e4SLinus Torvalds */ 101da177e4SLinus Torvalds #include <linux/config.h> 111da177e4SLinus Torvalds #include <linux/module.h> 121da177e4SLinus Torvalds #include <linux/types.h> 131da177e4SLinus Torvalds #include <linux/mm.h> 141da177e4SLinus Torvalds #include <linux/ioport.h> 151da177e4SLinus Torvalds #include <linux/list.h> 161da177e4SLinus Torvalds #include <linux/init.h> 171da177e4SLinus Torvalds 181da177e4SLinus Torvalds #include <asm/pgtable.h> 191da177e4SLinus Torvalds #include <asm/page.h> 201da177e4SLinus Torvalds #include <asm/irq.h> 211da177e4SLinus Torvalds #include <asm/io.h> 221da177e4SLinus Torvalds #include <asm/mach-types.h> 231da177e4SLinus Torvalds #include <asm/setup.h> 241da177e4SLinus Torvalds #include <asm/hardware/dec21285.h> 251da177e4SLinus Torvalds 261da177e4SLinus Torvalds #include <asm/mach/irq.h> 271da177e4SLinus Torvalds #include <asm/mach/map.h> 281da177e4SLinus Torvalds 291da177e4SLinus Torvalds #include "common.h" 301da177e4SLinus Torvalds 311da177e4SLinus Torvalds extern void __init isa_init_irq(unsigned int irq); 321da177e4SLinus Torvalds 331da177e4SLinus Torvalds unsigned int mem_fclk_21285 = 50000000; 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds EXPORT_SYMBOL(mem_fclk_21285); 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds static int __init parse_tag_memclk(const struct tag *tag) 381da177e4SLinus Torvalds { 391da177e4SLinus Torvalds mem_fclk_21285 = tag->u.memclk.fmemclk; 401da177e4SLinus Torvalds return 0; 411da177e4SLinus Torvalds } 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds __tagtable(ATAG_MEMCLK, parse_tag_memclk); 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds /* 461da177e4SLinus Torvalds * Footbridge IRQ translation table 471da177e4SLinus Torvalds * Converts from our IRQ numbers into FootBridge masks 481da177e4SLinus Torvalds */ 491da177e4SLinus Torvalds static const int fb_irq_mask[] = { 501da177e4SLinus Torvalds IRQ_MASK_UART_RX, /* 0 */ 511da177e4SLinus Torvalds IRQ_MASK_UART_TX, /* 1 */ 521da177e4SLinus Torvalds IRQ_MASK_TIMER1, /* 2 */ 531da177e4SLinus Torvalds IRQ_MASK_TIMER2, /* 3 */ 541da177e4SLinus Torvalds IRQ_MASK_TIMER3, /* 4 */ 551da177e4SLinus Torvalds IRQ_MASK_IN0, /* 5 */ 561da177e4SLinus Torvalds IRQ_MASK_IN1, /* 6 */ 571da177e4SLinus Torvalds IRQ_MASK_IN2, /* 7 */ 581da177e4SLinus Torvalds IRQ_MASK_IN3, /* 8 */ 591da177e4SLinus Torvalds IRQ_MASK_DOORBELLHOST, /* 9 */ 601da177e4SLinus Torvalds IRQ_MASK_DMA1, /* 10 */ 611da177e4SLinus Torvalds IRQ_MASK_DMA2, /* 11 */ 621da177e4SLinus Torvalds IRQ_MASK_PCI, /* 12 */ 631da177e4SLinus Torvalds IRQ_MASK_SDRAMPARITY, /* 13 */ 641da177e4SLinus Torvalds IRQ_MASK_I2OINPOST, /* 14 */ 651da177e4SLinus Torvalds IRQ_MASK_PCI_ABORT, /* 15 */ 661da177e4SLinus Torvalds IRQ_MASK_PCI_SERR, /* 16 */ 671da177e4SLinus Torvalds IRQ_MASK_DISCARD_TIMER, /* 17 */ 681da177e4SLinus Torvalds IRQ_MASK_PCI_DPERR, /* 18 */ 691da177e4SLinus Torvalds IRQ_MASK_PCI_PERR, /* 19 */ 701da177e4SLinus Torvalds }; 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds static void fb_mask_irq(unsigned int irq) 731da177e4SLinus Torvalds { 741da177e4SLinus Torvalds *CSR_IRQ_DISABLE = fb_irq_mask[_DC21285_INR(irq)]; 751da177e4SLinus Torvalds } 761da177e4SLinus Torvalds 771da177e4SLinus Torvalds static void fb_unmask_irq(unsigned int irq) 781da177e4SLinus Torvalds { 791da177e4SLinus Torvalds *CSR_IRQ_ENABLE = fb_irq_mask[_DC21285_INR(irq)]; 801da177e4SLinus Torvalds } 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds static struct irqchip fb_chip = { 831da177e4SLinus Torvalds .ack = fb_mask_irq, 841da177e4SLinus Torvalds .mask = fb_mask_irq, 851da177e4SLinus Torvalds .unmask = fb_unmask_irq, 861da177e4SLinus Torvalds }; 871da177e4SLinus Torvalds 881da177e4SLinus Torvalds static void __init __fb_init_irq(void) 891da177e4SLinus Torvalds { 901da177e4SLinus Torvalds unsigned int irq; 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds /* 931da177e4SLinus Torvalds * setup DC21285 IRQs 941da177e4SLinus Torvalds */ 951da177e4SLinus Torvalds *CSR_IRQ_DISABLE = -1; 961da177e4SLinus Torvalds *CSR_FIQ_DISABLE = -1; 971da177e4SLinus Torvalds 981da177e4SLinus Torvalds for (irq = _DC21285_IRQ(0); irq < _DC21285_IRQ(20); irq++) { 991da177e4SLinus Torvalds set_irq_chip(irq, &fb_chip); 1001da177e4SLinus Torvalds set_irq_handler(irq, do_level_IRQ); 1011da177e4SLinus Torvalds set_irq_flags(irq, IRQF_VALID | IRQF_PROBE); 1021da177e4SLinus Torvalds } 1031da177e4SLinus Torvalds } 1041da177e4SLinus Torvalds 1051da177e4SLinus Torvalds void __init footbridge_init_irq(void) 1061da177e4SLinus Torvalds { 1071da177e4SLinus Torvalds __fb_init_irq(); 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds if (!footbridge_cfn_mode()) 1101da177e4SLinus Torvalds return; 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds if (machine_is_ebsa285()) 1131da177e4SLinus Torvalds /* The following is dependent on which slot 1141da177e4SLinus Torvalds * you plug the Southbridge card into. We 1151da177e4SLinus Torvalds * currently assume that you plug it into 1161da177e4SLinus Torvalds * the right-hand most slot. 1171da177e4SLinus Torvalds */ 1181da177e4SLinus Torvalds isa_init_irq(IRQ_PCI); 1191da177e4SLinus Torvalds 1201da177e4SLinus Torvalds if (machine_is_cats()) 1211da177e4SLinus Torvalds isa_init_irq(IRQ_IN2); 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds if (machine_is_netwinder()) 1241da177e4SLinus Torvalds isa_init_irq(IRQ_IN3); 1251da177e4SLinus Torvalds } 1261da177e4SLinus Torvalds 1271da177e4SLinus Torvalds /* 1281da177e4SLinus Torvalds * Common mapping for all systems. Note that the outbound write flush is 1291da177e4SLinus Torvalds * commented out since there is a "No Fix" problem with it. Not mapping 1301da177e4SLinus Torvalds * it means that we have extra bullet protection on our feet. 1311da177e4SLinus Torvalds */ 1321da177e4SLinus Torvalds static struct map_desc fb_common_io_desc[] __initdata = { 133a427ceefSDeepak Saxena { 134a427ceefSDeepak Saxena .virtual = ARMCSR_BASE, 135865052fdSRussell King .pfn = __phys_to_pfn(DC21285_ARMCSR_BASE), 136a427ceefSDeepak Saxena .length = ARMCSR_SIZE, 1376460177fSRussell King .type = MT_DEVICE, 138a427ceefSDeepak Saxena }, { 139a427ceefSDeepak Saxena .virtual = XBUS_BASE, 140a427ceefSDeepak Saxena .pfn = __phys_to_pfn(0x40000000), 141a427ceefSDeepak Saxena .length = XBUS_SIZE, 1426460177fSRussell King .type = MT_DEVICE, 143a427ceefSDeepak Saxena } 1441da177e4SLinus Torvalds }; 1451da177e4SLinus Torvalds 1461da177e4SLinus Torvalds /* 1471da177e4SLinus Torvalds * The mapping when the footbridge is in host mode. We don't map any of 1481da177e4SLinus Torvalds * this when we are in add-in mode. 1491da177e4SLinus Torvalds */ 1501da177e4SLinus Torvalds static struct map_desc ebsa285_host_io_desc[] __initdata = { 1511da177e4SLinus Torvalds #if defined(CONFIG_ARCH_FOOTBRIDGE) && defined(CONFIG_FOOTBRIDGE_HOST) 152a427ceefSDeepak Saxena { 153a427ceefSDeepak Saxena .virtual = PCIMEM_BASE, 154a427ceefSDeepak Saxena .pfn = __phys_to_pfn(DC21285_PCI_MEM), 155a427ceefSDeepak Saxena .length = PCIMEM_SIZE, 1566460177fSRussell King .type = MT_DEVICE, 157a427ceefSDeepak Saxena }, { 158a427ceefSDeepak Saxena .virtual = PCICFG0_BASE, 159a427ceefSDeepak Saxena .pfn = __phys_to_pfn(DC21285_PCI_TYPE_0_CONFIG), 160a427ceefSDeepak Saxena .length = PCICFG0_SIZE, 1616460177fSRussell King .type = MT_DEVICE, 162a427ceefSDeepak Saxena }, { 163a427ceefSDeepak Saxena .virtual = PCICFG1_BASE, 164a427ceefSDeepak Saxena .pfn = __phys_to_pfn(DC21285_PCI_TYPE_1_CONFIG), 165a427ceefSDeepak Saxena .length = PCICFG1_SIZE, 1666460177fSRussell King .type = MT_DEVICE, 167a427ceefSDeepak Saxena }, { 168a427ceefSDeepak Saxena .virtual = PCIIACK_BASE, 169a427ceefSDeepak Saxena .pfn = __phys_to_pfn(DC21285_PCI_IACK), 170a427ceefSDeepak Saxena .length = PCIIACK_SIZE, 1716460177fSRussell King .type = MT_DEVICE, 172a427ceefSDeepak Saxena }, { 173a427ceefSDeepak Saxena .virtual = PCIO_BASE, 174a427ceefSDeepak Saxena .pfn = __phys_to_pfn(DC21285_PCI_IO), 175a427ceefSDeepak Saxena .length = PCIO_SIZE, 1766460177fSRussell King .type = MT_DEVICE, 1776460177fSRussell King }, 1781da177e4SLinus Torvalds #endif 1791da177e4SLinus Torvalds }; 1801da177e4SLinus Torvalds 1811da177e4SLinus Torvalds /* 1821da177e4SLinus Torvalds * The CO-ebsa285 mapping. 1831da177e4SLinus Torvalds */ 1841da177e4SLinus Torvalds static struct map_desc co285_io_desc[] __initdata = { 1851da177e4SLinus Torvalds #ifdef CONFIG_ARCH_CO285 186a427ceefSDeepak Saxena { 187a427ceefSDeepak Saxena .virtual = PCIO_BASE, 188a427ceefSDeepak Saxena .pfn = __phys_to_pfn(DC21285_PCI_IO), 189a427ceefSDeepak Saxena .length = PCIO_SIZE, 1906460177fSRussell King .type = MT_DEVICE, 191a427ceefSDeepak Saxena }, { 192a427ceefSDeepak Saxena .virtual = PCIMEM_BASE, 193a427ceefSDeepak Saxena .pfn = __phys_to_pfn(DC21285_PCI_MEM), 194a427ceefSDeepak Saxena .length = PCIMEM_SIZE, 1956460177fSRussell King .type = MT_DEVICE, 1966460177fSRussell King }, 1971da177e4SLinus Torvalds #endif 1981da177e4SLinus Torvalds }; 1991da177e4SLinus Torvalds 2001da177e4SLinus Torvalds void __init footbridge_map_io(void) 2011da177e4SLinus Torvalds { 2021da177e4SLinus Torvalds /* 2031da177e4SLinus Torvalds * Set up the common mapping first; we need this to 2041da177e4SLinus Torvalds * determine whether we're in host mode or not. 2051da177e4SLinus Torvalds */ 2061da177e4SLinus Torvalds iotable_init(fb_common_io_desc, ARRAY_SIZE(fb_common_io_desc)); 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds /* 2091da177e4SLinus Torvalds * Now, work out what we've got to map in addition on this 2101da177e4SLinus Torvalds * platform. 2111da177e4SLinus Torvalds */ 2121da177e4SLinus Torvalds if (machine_is_co285()) 2131da177e4SLinus Torvalds iotable_init(co285_io_desc, ARRAY_SIZE(co285_io_desc)); 2141da177e4SLinus Torvalds if (footbridge_cfn_mode()) 2151da177e4SLinus Torvalds iotable_init(ebsa285_host_io_desc, ARRAY_SIZE(ebsa285_host_io_desc)); 2161da177e4SLinus Torvalds } 2171da177e4SLinus Torvalds 2181da177e4SLinus Torvalds #ifdef CONFIG_FOOTBRIDGE_ADDIN 2191da177e4SLinus Torvalds 2201da177e4SLinus Torvalds /* 2211da177e4SLinus Torvalds * These two functions convert virtual addresses to PCI addresses and PCI 2221da177e4SLinus Torvalds * addresses to virtual addresses. Note that it is only legal to use these 2231da177e4SLinus Torvalds * on memory obtained via get_zeroed_page or kmalloc. 2241da177e4SLinus Torvalds */ 2251da177e4SLinus Torvalds unsigned long __virt_to_bus(unsigned long res) 2261da177e4SLinus Torvalds { 2271da177e4SLinus Torvalds WARN_ON(res < PAGE_OFFSET || res >= (unsigned long)high_memory); 2281da177e4SLinus Torvalds 2291da177e4SLinus Torvalds return (res - PAGE_OFFSET) + (*CSR_PCISDRAMBASE & 0xfffffff0); 2301da177e4SLinus Torvalds } 2311da177e4SLinus Torvalds EXPORT_SYMBOL(__virt_to_bus); 2321da177e4SLinus Torvalds 2331da177e4SLinus Torvalds unsigned long __bus_to_virt(unsigned long res) 2341da177e4SLinus Torvalds { 2351da177e4SLinus Torvalds res -= (*CSR_PCISDRAMBASE & 0xfffffff0); 2361da177e4SLinus Torvalds res += PAGE_OFFSET; 2371da177e4SLinus Torvalds 2381da177e4SLinus Torvalds WARN_ON(res < PAGE_OFFSET || res >= (unsigned long)high_memory); 2391da177e4SLinus Torvalds 2401da177e4SLinus Torvalds return res; 2411da177e4SLinus Torvalds } 2421da177e4SLinus Torvalds EXPORT_SYMBOL(__bus_to_virt); 2431da177e4SLinus Torvalds 2441da177e4SLinus Torvalds #endif 245