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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/sbus/sbus.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/sbus/sbus.c')
-rw-r--r-- | drivers/sbus/sbus.c | 564 |
1 files changed, 564 insertions, 0 deletions
diff --git a/drivers/sbus/sbus.c b/drivers/sbus/sbus.c new file mode 100644 index 0000000..5d30a3e --- /dev/null +++ b/drivers/sbus/sbus.c @@ -0,0 +1,564 @@ +/* $Id: sbus.c,v 1.100 2002/01/24 15:36:24 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 } }; +#ifdef CONFIG_SPARC32 +static int interrupts[PROMINTR_MAX] __initdata = { 0 }; +#endif + +#ifdef CONFIG_PCI +extern int pcic_present(void); +#endif + +/* 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 CONFIG_SPARC64 + 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); + } +#endif /* CONFIG_SPARC64 */ + +#ifdef CONFIG_SPARC32 + len = prom_getproperty(prom_node, "intr", + (char *)irqs, sizeof(irqs)); + if (len != -1) { + 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; + } + } else { + /* No "intr" node found-- check for "interrupts" node. + * This node contains SBus interrupt levels, not IPLs + * as in "intr", and no vector values. We convert + * SBus interrupt levels to PILs (platform specific). + */ + len = prom_getproperty(prom_node, "interrupts", + (char *)interrupts, sizeof(interrupts)); + if (len == -1) { + sdev->irqs[0] = 0; + sdev->num_irqs = 0; + } else { + sdev->num_irqs = len / sizeof(int); + for (len = 0; len < sdev->num_irqs; len++) { + sdev->irqs[len] = sbint_to_irq(sdev, interrupts[len]); + } + } + } +#endif /* CONFIG_SPARC32 */ +} + +/* 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 = NULL; + 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 = NULL; + 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 + */ +/* added back sun4d patch from Thomas Bogendoerfer - should be OK (crn) */ + +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); +#ifdef CONFIG_SPARC32 + if (sparc_cpu_model == sun4d) { + struct linux_prom_ranges iounit_ranges[PROMREG_MAX]; + int num_iounit_ranges; + + len = prom_getproperty(parent_node, "ranges", + (char *) iounit_ranges, + sizeof (iounit_ranges)); + if (len != -1) { + num_iounit_ranges = (len/sizeof(struct linux_prom_ranges)); + prom_adjust_ranges (sbus->sbus_ranges, sbus->num_sbus_ranges, iounit_ranges, num_iounit_ranges); + } + } +#endif +} + +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); + +#ifdef CONFIG_SUN4 +extern void sun4_dvma_init(void); +#endif + +static int __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? */ + +#ifdef CONFIG_SPARC32 + register_proc_sparc_ioport(); +#endif + +#ifdef CONFIG_SUN4 + sun4_dvma_init(); + return 0; +#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 (!pcic_present()) { + prom_printf("Neither SBUS nor PCI found.\n"); + prom_halt(); + } else { +#ifdef CONFIG_SPARC64 + firetruck_init(); +#endif + } + return 0; +#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 (!pcic_present()) { + prom_printf("Neither SBUS nor PCI found.\n"); + prom_halt(); + } + return 0; +#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 CONFIG_SPARC64 + /* 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 /* CONFIG_SPARC64 */ + +#ifdef CONFIG_SPARC32 + if (sparc_cpu_model == sun4d) + iounit_init(this_sbus, iommund, sbus); +#endif /* CONFIG_SPARC32 */ + 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; +#ifdef CONFIG_SPARC32 + 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 = NULL; + 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 = NULL; + 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(); + } + +#ifdef CONFIG_SPARC64 + if (sparc_cpu_model == sun4u) { + firetruck_init(); + } +#endif +#ifdef CONFIG_SUN_AUXIO + if (sparc_cpu_model == sun4u) + auxio_probe (); +#endif +#ifdef CONFIG_SPARC64 + if (sparc_cpu_model == sun4u) { + extern void clock_probe(void); + + clock_probe(); + } +#endif + + return 0; +} + +subsys_initcall(sbus_init); |