sbus.c
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- /* $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 <linux/kernel.h>
- #include <linux/slab.h>
- #include <linux/config.h>
- #include <linux/init.h>
- #include <linux/pci.h>
- #include <asm/system.h>
- #include <asm/sbus.h>
- #include <asm/dma.h>
- #include <asm/oplib.h>
- #include <asm/bpp.h>
- #include <asm/irq.h>
- 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 %dn",
- 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=%dn",
- 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 %dn",
- 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=%dn",
- 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 foundn");
- 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 MHzn", (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);
- if (!sbus_devs) {
- sbus->devices = NULL;
- goto next_bus;
- }
- 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);
- next_bus:
- 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
- }