/* $Id: sbus.c,v 1.95.2.3 2002/01/05 01:12:31 davem Exp $ * sbus.c: SBus support routines. * * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) */ #include #include #include #include #include #include #include #include #include #include #include struct sbus_bus *sbus_root = NULL; static struct linux_prom_irqs irqs[PROMINTR_MAX] __initdata = { { 0 } }; /* Perhaps when I figure out more about the iommu we'll put a * device registration routine here that probe_sbus() calls to * setup the iommu for each Sbus. */ /* We call this for each SBus device, and fill the structure based * upon the prom device tree. We return the start of memory after * the things we have allocated. */ /* #define DEBUG_FILL */ static void __init fill_sbus_device(int prom_node, struct sbus_dev *sdev) { unsigned long address, base; int len; sdev->prom_node = prom_node; prom_getstring(prom_node, "name", sdev->prom_name, sizeof(sdev->prom_name)); address = prom_getint(prom_node, "address"); len = prom_getproperty(prom_node, "reg", (char *) sdev->reg_addrs, sizeof(sdev->reg_addrs)); if (len == -1) { sdev->num_registers = 0; goto no_regs; } if (len % sizeof(struct linux_prom_registers)) { prom_printf("fill_sbus_device: proplen for regs of %s " " was %d, need multiple of %d\n", sdev->prom_name, len, (int) sizeof(struct linux_prom_registers)); prom_halt(); } if (len > (sizeof(struct linux_prom_registers) * PROMREG_MAX)) { prom_printf("fill_sbus_device: Too many register properties " "for device %s, len=%d\n", sdev->prom_name, len); prom_halt(); } sdev->num_registers = len / sizeof(struct linux_prom_registers); sdev->ranges_applied = 0; base = (unsigned long) sdev->reg_addrs[0].phys_addr; /* Compute the slot number. */ if (base >= SUN_SBUS_BVADDR && sparc_cpu_model == sun4m) { sdev->slot = sbus_dev_slot(base); } else { sdev->slot = sdev->reg_addrs[0].which_io; } no_regs: len = prom_getproperty(prom_node, "ranges", (char *)sdev->device_ranges, sizeof(sdev->device_ranges)); if (len == -1) { sdev->num_device_ranges = 0; goto no_ranges; } if (len % sizeof(struct linux_prom_ranges)) { prom_printf("fill_sbus_device: proplen for ranges of %s " " was %d, need multiple of %d\n", sdev->prom_name, len, (int) sizeof(struct linux_prom_ranges)); prom_halt(); } if (len > (sizeof(struct linux_prom_ranges) * PROMREG_MAX)) { prom_printf("fill_sbus_device: Too many range properties " "for device %s, len=%d\n", sdev->prom_name, len); prom_halt(); } sdev->num_device_ranges = len / sizeof(struct linux_prom_ranges); no_ranges: /* XXX Unfortunately, IRQ issues are very arch specific. * XXX Pull this crud out into an arch specific area * XXX at some point. -DaveM */ #ifdef __sparc_v9__ len = prom_getproperty(prom_node, "interrupts", (char *) irqs, sizeof(irqs)); if (len == -1 || len == 0) { sdev->irqs[0] = 0; sdev->num_irqs = 0; } else { unsigned int pri = irqs[0].pri; sdev->num_irqs = 1; if (pri < 0x20) pri += sdev->slot * 8; sdev->irqs[0] = sbus_build_irq(sdev->bus, pri); } #else len = prom_getproperty(prom_node, "intr", (char *)irqs, sizeof(irqs)); if (len == -1) len = 0; sdev->num_irqs = len / 8; if (sdev->num_irqs == 0) { sdev->irqs[0] = 0; } else if (sparc_cpu_model == sun4d) { extern unsigned int sun4d_build_irq(struct sbus_dev *sdev, int irq); for (len = 0; len < sdev->num_irqs; len++) sdev->irqs[len] = sun4d_build_irq(sdev, irqs[len].pri); } else { for (len = 0; len < sdev->num_irqs; len++) sdev->irqs[len] = irqs[len].pri; } #endif /* !__sparc_v9__ */ } /* This routine gets called from whoever needs the sbus first, to scan * the SBus device tree. Currently it just prints out the devices * found on the bus and builds trees of SBUS structs and attached * devices. */ extern void iommu_init(int iommu_node, struct sbus_bus *sbus); extern void iounit_init(int sbi_node, int iounit_node, struct sbus_bus *sbus); void sun4_init(void); #ifdef CONFIG_SUN_AUXIO extern void auxio_probe(void); #endif static void __init sbus_do_child_siblings(int start_node, struct sbus_dev *child, struct sbus_dev *parent, struct sbus_bus *sbus) { struct sbus_dev *this_dev = child; int this_node = start_node; /* Child already filled in, just need to traverse siblings. */ child->child = NULL; child->parent = parent; while((this_node = prom_getsibling(this_node)) != 0) { this_dev->next = kmalloc(sizeof(struct sbus_dev), GFP_ATOMIC); this_dev = this_dev->next; this_dev->next = 0; this_dev->parent = parent; this_dev->bus = sbus; fill_sbus_device(this_node, this_dev); if(prom_getchild(this_node)) { this_dev->child = kmalloc(sizeof(struct sbus_dev), GFP_ATOMIC); this_dev->child->bus = sbus; this_dev->child->next = 0; fill_sbus_device(prom_getchild(this_node), this_dev->child); sbus_do_child_siblings(prom_getchild(this_node), this_dev->child, this_dev, sbus); } else { this_dev->child = NULL; } } } /* * XXX This functions appears to be a distorted version of * prom_sbus_ranges_init(), with all sun4d stuff cut away. * Ask DaveM what is going on here, how is sun4d supposed to work... XXX */ static void __init sbus_bus_ranges_init(int parent_node, struct sbus_bus *sbus) { int len; len = prom_getproperty(sbus->prom_node, "ranges", (char *) sbus->sbus_ranges, sizeof(sbus->sbus_ranges)); if (len == -1 || len == 0) { sbus->num_sbus_ranges = 0; return; } sbus->num_sbus_ranges = len / sizeof(struct linux_prom_ranges); } static void __init __apply_ranges_to_regs(struct linux_prom_ranges *ranges, int num_ranges, struct linux_prom_registers *regs, int num_regs) { if (num_ranges) { int regnum; for (regnum = 0; regnum < num_regs; regnum++) { int rngnum; for (rngnum = 0; rngnum < num_ranges; rngnum++) { if (regs[regnum].which_io == ranges[rngnum].ot_child_space) break; } if (rngnum == num_ranges) { /* We used to flag this as an error. Actually * some devices do not report the regs as we expect. * For example, see SUNW,pln device. In that case * the reg property is in a format internal to that * node, ie. it is not in the SBUS register space * per se. -DaveM */ return; } regs[regnum].which_io = ranges[rngnum].ot_parent_space; regs[regnum].phys_addr -= ranges[rngnum].ot_child_base; regs[regnum].phys_addr += ranges[rngnum].ot_parent_base; } } } static void __init __fixup_regs_sdev(struct sbus_dev *sdev) { if (sdev->num_registers != 0) { struct sbus_dev *parent = sdev->parent; int i; while (parent != NULL) { __apply_ranges_to_regs(parent->device_ranges, parent->num_device_ranges, sdev->reg_addrs, sdev->num_registers); parent = parent->parent; } __apply_ranges_to_regs(sdev->bus->sbus_ranges, sdev->bus->num_sbus_ranges, sdev->reg_addrs, sdev->num_registers); for (i = 0; i < sdev->num_registers; i++) { struct resource *res = &sdev->resource[i]; res->start = sdev->reg_addrs[i].phys_addr; res->end = (res->start + (unsigned long)sdev->reg_addrs[i].reg_size - 1UL); res->flags = IORESOURCE_IO | (sdev->reg_addrs[i].which_io & 0xff); } } } static void __init sbus_fixup_all_regs(struct sbus_dev *first_sdev) { struct sbus_dev *sdev; for (sdev = first_sdev; sdev; sdev = sdev->next) { if (sdev->child) sbus_fixup_all_regs(sdev->child); __fixup_regs_sdev(sdev); } } extern void register_proc_sparc_ioport(void); extern void firetruck_init(void); extern void rs_init(void); void __init sbus_init(void) { int nd, this_sbus, sbus_devs, topnd, iommund; unsigned int sbus_clock; struct sbus_bus *sbus; struct sbus_dev *this_dev; int num_sbus = 0; /* How many did we find? */ #ifndef __sparc_v9__ register_proc_sparc_ioport(); #endif #ifdef CONFIG_SUN4 return sun4_dvma_init(); #endif topnd = prom_getchild(prom_root_node); /* Finding the first sbus is a special case... */ iommund = 0; if(sparc_cpu_model == sun4u) { nd = prom_searchsiblings(topnd, "sbus"); if(nd == 0) { #ifdef CONFIG_PCI if (!pcibios_present()) { prom_printf("Neither SBUS nor PCI found.\n"); prom_halt(); } else { #ifdef __sparc_v9__ firetruck_init(); #endif } return; #else prom_printf("YEEE, UltraSparc sbus not found\n"); prom_halt(); #endif } } else if(sparc_cpu_model == sun4d) { if((iommund = prom_searchsiblings(topnd, "io-unit")) == 0 || (nd = prom_getchild(iommund)) == 0 || (nd = prom_searchsiblings(nd, "sbi")) == 0) { panic("sbi not found"); } } else if((nd = prom_searchsiblings(topnd, "sbus")) == 0) { if((iommund = prom_searchsiblings(topnd, "iommu")) == 0 || (nd = prom_getchild(iommund)) == 0 || (nd = prom_searchsiblings(nd, "sbus")) == 0) { #ifdef CONFIG_PCI if (!pcibios_present()) { prom_printf("Neither SBUS nor PCI found.\n"); prom_halt(); } return; #else /* No reason to run further - the data access trap will occur. */ panic("sbus not found"); #endif } } /* Ok, we've found the first one, allocate first SBus struct * and place in chain. */ sbus = sbus_root = kmalloc(sizeof(struct sbus_bus), GFP_ATOMIC); sbus->next = NULL; sbus->prom_node = nd; this_sbus = nd; if(iommund && sparc_cpu_model != sun4u && sparc_cpu_model != sun4d) iommu_init(iommund, sbus); /* Loop until we find no more SBUS's */ while(this_sbus) { #ifdef __sparc_v9__ /* IOMMU hides inside SBUS/SYSIO prom node on Ultra. */ if(sparc_cpu_model == sun4u) { extern void sbus_iommu_init(int prom_node, struct sbus_bus *sbus); sbus_iommu_init(this_sbus, sbus); } #endif #ifndef __sparc_v9__ if (sparc_cpu_model == sun4d) iounit_init(this_sbus, iommund, sbus); #endif printk("sbus%d: ", num_sbus); sbus_clock = prom_getint(this_sbus, "clock-frequency"); if(sbus_clock == -1) sbus_clock = (25*1000*1000); printk("Clock %d.%d MHz\n", (int) ((sbus_clock/1000)/1000), (int) (((sbus_clock/1000)%1000 != 0) ? (((sbus_clock/1000)%1000) + 1000) : 0)); prom_getstring(this_sbus, "name", sbus->prom_name, sizeof(sbus->prom_name)); sbus->clock_freq = sbus_clock; #ifndef __sparc_v9__ if (sparc_cpu_model == sun4d) { sbus->devid = prom_getint(iommund, "device-id"); sbus->board = prom_getint(iommund, "board#"); } #endif sbus_bus_ranges_init(iommund, sbus); sbus_devs = prom_getchild(this_sbus); sbus->devices = kmalloc(sizeof(struct sbus_dev), GFP_ATOMIC); this_dev = sbus->devices; this_dev->next = NULL; this_dev->bus = sbus; this_dev->parent = NULL; fill_sbus_device(sbus_devs, this_dev); /* Should we traverse for children? */ if(prom_getchild(sbus_devs)) { /* Allocate device node */ this_dev->child = kmalloc(sizeof(struct sbus_dev), GFP_ATOMIC); /* Fill it */ this_dev->child->bus = sbus; this_dev->child->next = 0; fill_sbus_device(prom_getchild(sbus_devs), this_dev->child); sbus_do_child_siblings(prom_getchild(sbus_devs), this_dev->child, this_dev, sbus); } else { this_dev->child = NULL; } while((sbus_devs = prom_getsibling(sbus_devs)) != 0) { /* Allocate device node */ this_dev->next = kmalloc(sizeof(struct sbus_dev), GFP_ATOMIC); this_dev = this_dev->next; this_dev->next = NULL; /* Fill it */ this_dev->bus = sbus; this_dev->parent = NULL; fill_sbus_device(sbus_devs, this_dev); /* Is there a child node hanging off of us? */ if(prom_getchild(sbus_devs)) { /* Get new device struct */ this_dev->child = kmalloc(sizeof(struct sbus_dev), GFP_ATOMIC); /* Fill it */ this_dev->child->bus = sbus; this_dev->child->next = 0; fill_sbus_device(prom_getchild(sbus_devs), this_dev->child); sbus_do_child_siblings(prom_getchild(sbus_devs), this_dev->child, this_dev, sbus); } else { this_dev->child = NULL; } } /* Walk all devices and apply parent ranges. */ sbus_fixup_all_regs(sbus->devices); dvma_init(sbus); num_sbus++; if(sparc_cpu_model == sun4u) { this_sbus = prom_getsibling(this_sbus); if(!this_sbus) break; this_sbus = prom_searchsiblings(this_sbus, "sbus"); } else if(sparc_cpu_model == sun4d) { iommund = prom_getsibling(iommund); if(!iommund) break; iommund = prom_searchsiblings(iommund, "io-unit"); if(!iommund) break; this_sbus = prom_searchsiblings(prom_getchild(iommund), "sbi"); } else { this_sbus = prom_getsibling(this_sbus); if(!this_sbus) break; this_sbus = prom_searchsiblings(this_sbus, "sbus"); } if(this_sbus) { sbus->next = kmalloc(sizeof(struct sbus_bus), GFP_ATOMIC); sbus = sbus->next; sbus->next = NULL; sbus->prom_node = this_sbus; } else { break; } } /* while(this_sbus) */ if (sparc_cpu_model == sun4d) { extern void sun4d_init_sbi_irq(void); sun4d_init_sbi_irq(); } rs_init(); #ifdef __sparc_v9__ if (sparc_cpu_model == sun4u) { firetruck_init(); } #endif #ifdef CONFIG_SUN_AUXIO if (sparc_cpu_model == sun4u) auxio_probe (); #endif #ifdef __sparc_v9__ if (sparc_cpu_model == sun4u) { extern void clock_probe(void); clock_probe(); } #endif }