diff options
Diffstat (limited to 'arch/sparc64/kernel/of_device.c')
| -rw-r--r-- | arch/sparc64/kernel/of_device.c | 898 |
1 files changed, 0 insertions, 898 deletions
diff --git a/arch/sparc64/kernel/of_device.c b/arch/sparc64/kernel/of_device.c deleted file mode 100644 index df2efb7fc14..00000000000 --- a/arch/sparc64/kernel/of_device.c +++ /dev/null @@ -1,898 +0,0 @@ -#include <linux/string.h> -#include <linux/kernel.h> -#include <linux/of.h> -#include <linux/init.h> -#include <linux/module.h> -#include <linux/mod_devicetable.h> -#include <linux/slab.h> -#include <linux/errno.h> -#include <linux/irq.h> -#include <linux/of_device.h> -#include <linux/of_platform.h> - -void __iomem *of_ioremap(struct resource *res, unsigned long offset, unsigned long size, char *name) -{ - unsigned long ret = res->start + offset; - struct resource *r; - - if (res->flags & IORESOURCE_MEM) - r = request_mem_region(ret, size, name); - else - r = request_region(ret, size, name); - if (!r) - ret = 0; - - return (void __iomem *) ret; -} -EXPORT_SYMBOL(of_ioremap); - -void of_iounmap(struct resource *res, void __iomem *base, unsigned long size) -{ - if (res->flags & IORESOURCE_MEM) - release_mem_region((unsigned long) base, size); - else - release_region((unsigned long) base, size); -} -EXPORT_SYMBOL(of_iounmap); - -static int node_match(struct device *dev, void *data) -{ - struct of_device *op = to_of_device(dev); - struct device_node *dp = data; - - return (op->node == dp); -} - -struct of_device *of_find_device_by_node(struct device_node *dp) -{ - struct device *dev = bus_find_device(&of_platform_bus_type, NULL, - dp, node_match); - - if (dev) - return to_of_device(dev); - - return NULL; -} -EXPORT_SYMBOL(of_find_device_by_node); - -unsigned int irq_of_parse_and_map(struct device_node *node, int index) -{ - struct of_device *op = of_find_device_by_node(node); - - if (!op || index >= op->num_irqs) - return 0; - - return op->irqs[index]; -} -EXPORT_SYMBOL(irq_of_parse_and_map); - -/* Take the archdata values for IOMMU, STC, and HOSTDATA found in - * BUS and propagate to all child of_device objects. - */ -void of_propagate_archdata(struct of_device *bus) -{ - struct dev_archdata *bus_sd = &bus->dev.archdata; - struct device_node *bus_dp = bus->node; - struct device_node *dp; - - for (dp = bus_dp->child; dp; dp = dp->sibling) { - struct of_device *op = of_find_device_by_node(dp); - - op->dev.archdata.iommu = bus_sd->iommu; - op->dev.archdata.stc = bus_sd->stc; - op->dev.archdata.host_controller = bus_sd->host_controller; - op->dev.archdata.numa_node = bus_sd->numa_node; - - if (dp->child) - of_propagate_archdata(op); - } -} - -struct bus_type of_platform_bus_type; -EXPORT_SYMBOL(of_platform_bus_type); - -static inline u64 of_read_addr(const u32 *cell, int size) -{ - u64 r = 0; - while (size--) - r = (r << 32) | *(cell++); - return r; -} - -static void __init get_cells(struct device_node *dp, - int *addrc, int *sizec) -{ - if (addrc) - *addrc = of_n_addr_cells(dp); - if (sizec) - *sizec = of_n_size_cells(dp); -} - -/* Max address size we deal with */ -#define OF_MAX_ADDR_CELLS 4 - -struct of_bus { - const char *name; - const char *addr_prop_name; - int (*match)(struct device_node *parent); - void (*count_cells)(struct device_node *child, - int *addrc, int *sizec); - int (*map)(u32 *addr, const u32 *range, - int na, int ns, int pna); - unsigned long (*get_flags)(const u32 *addr, unsigned long); -}; - -/* - * Default translator (generic bus) - */ - -static void of_bus_default_count_cells(struct device_node *dev, - int *addrc, int *sizec) -{ - get_cells(dev, addrc, sizec); -} - -/* Make sure the least significant 64-bits are in-range. Even - * for 3 or 4 cell values it is a good enough approximation. - */ -static int of_out_of_range(const u32 *addr, const u32 *base, - const u32 *size, int na, int ns) -{ - u64 a = of_read_addr(addr, na); - u64 b = of_read_addr(base, na); - - if (a < b) - return 1; - - b += of_read_addr(size, ns); - if (a >= b) - return 1; - - return 0; -} - -static int of_bus_default_map(u32 *addr, const u32 *range, - int na, int ns, int pna) -{ - u32 result[OF_MAX_ADDR_CELLS]; - int i; - - if (ns > 2) { - printk("of_device: Cannot handle size cells (%d) > 2.", ns); - return -EINVAL; - } - - if (of_out_of_range(addr, range, range + na + pna, na, ns)) - return -EINVAL; - - /* Start with the parent range base. */ - memcpy(result, range + na, pna * 4); - - /* Add in the child address offset. */ - for (i = 0; i < na; i++) - result[pna - 1 - i] += - (addr[na - 1 - i] - - range[na - 1 - i]); - - memcpy(addr, result, pna * 4); - - return 0; -} - -static unsigned long of_bus_default_get_flags(const u32 *addr, unsigned long flags) -{ - if (flags) - return flags; - return IORESOURCE_MEM; -} - -/* - * PCI bus specific translator - */ - -static int of_bus_pci_match(struct device_node *np) -{ - if (!strcmp(np->name, "pci")) { - const char *model = of_get_property(np, "model", NULL); - - if (model && !strcmp(model, "SUNW,simba")) - return 0; - - /* Do not do PCI specific frobbing if the - * PCI bridge lacks a ranges property. We - * want to pass it through up to the next - * parent as-is, not with the PCI translate - * method which chops off the top address cell. - */ - if (!of_find_property(np, "ranges", NULL)) - return 0; - - return 1; - } - - return 0; -} - -static int of_bus_simba_match(struct device_node *np) -{ - const char *model = of_get_property(np, "model", NULL); - - if (model && !strcmp(model, "SUNW,simba")) - return 1; - - /* Treat PCI busses lacking ranges property just like - * simba. - */ - if (!strcmp(np->name, "pci")) { - if (!of_find_property(np, "ranges", NULL)) - return 1; - } - - return 0; -} - -static int of_bus_simba_map(u32 *addr, const u32 *range, - int na, int ns, int pna) -{ - return 0; -} - -static void of_bus_pci_count_cells(struct device_node *np, - int *addrc, int *sizec) -{ - if (addrc) - *addrc = 3; - if (sizec) - *sizec = 2; -} - -static int of_bus_pci_map(u32 *addr, const u32 *range, - int na, int ns, int pna) -{ - u32 result[OF_MAX_ADDR_CELLS]; - int i; - - /* Check address type match */ - if ((addr[0] ^ range[0]) & 0x03000000) - return -EINVAL; - - if (of_out_of_range(addr + 1, range + 1, range + na + pna, - na - 1, ns)) - return -EINVAL; - - /* Start with the parent range base. */ - memcpy(result, range + na, pna * 4); - - /* Add in the child address offset, skipping high cell. */ - for (i = 0; i < na - 1; i++) - result[pna - 1 - i] += - (addr[na - 1 - i] - - range[na - 1 - i]); - - memcpy(addr, result, pna * 4); - - return 0; -} - -static unsigned long of_bus_pci_get_flags(const u32 *addr, unsigned long flags) -{ - u32 w = addr[0]; - - /* For PCI, we override whatever child busses may have used. */ - flags = 0; - switch((w >> 24) & 0x03) { - case 0x01: - flags |= IORESOURCE_IO; - break; - - case 0x02: /* 32 bits */ - case 0x03: /* 64 bits */ - flags |= IORESOURCE_MEM; - break; - } - if (w & 0x40000000) - flags |= IORESOURCE_PREFETCH; - return flags; -} - -/* - * SBUS bus specific translator - */ - -static int of_bus_sbus_match(struct device_node *np) -{ - return !strcmp(np->name, "sbus") || - !strcmp(np->name, "sbi"); -} - -static void of_bus_sbus_count_cells(struct device_node *child, - int *addrc, int *sizec) -{ - if (addrc) - *addrc = 2; - if (sizec) - *sizec = 1; -} - -/* - * FHC/Central bus specific translator. - * - * This is just needed to hard-code the address and size cell - * counts. 'fhc' and 'central' nodes lack the #address-cells and - * #size-cells properties, and if you walk to the root on such - * Enterprise boxes all you'll get is a #size-cells of 2 which is - * not what we want to use. - */ -static int of_bus_fhc_match(struct device_node *np) -{ - return !strcmp(np->name, "fhc") || - !strcmp(np->name, "central"); -} - -#define of_bus_fhc_count_cells of_bus_sbus_count_cells - -/* - * Array of bus specific translators - */ - -static struct of_bus of_busses[] = { - /* PCI */ - { - .name = "pci", - .addr_prop_name = "assigned-addresses", - .match = of_bus_pci_match, - .count_cells = of_bus_pci_count_cells, - .map = of_bus_pci_map, - .get_flags = of_bus_pci_get_flags, - }, - /* SIMBA */ - { - .name = "simba", - .addr_prop_name = "assigned-addresses", - .match = of_bus_simba_match, - .count_cells = of_bus_pci_count_cells, - .map = of_bus_simba_map, - .get_flags = of_bus_pci_get_flags, - }, - /* SBUS */ - { - .name = "sbus", - .addr_prop_name = "reg", - .match = of_bus_sbus_match, - .count_cells = of_bus_sbus_count_cells, - .map = of_bus_default_map, - .get_flags = of_bus_default_get_flags, - }, - /* FHC */ - { - .name = "fhc", - .addr_prop_name = "reg", - .match = of_bus_fhc_match, - .count_cells = of_bus_fhc_count_cells, - .map = of_bus_default_map, - .get_flags = of_bus_default_get_flags, - }, - /* Default */ - { - .name = "default", - .addr_prop_name = "reg", - .match = NULL, - .count_cells = of_bus_default_count_cells, - .map = of_bus_default_map, - .get_flags = of_bus_default_get_flags, - }, -}; - -static struct of_bus *of_match_bus(struct device_node *np) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(of_busses); i ++) - if (!of_busses[i].match || of_busses[i].match(np)) - return &of_busses[i]; - BUG(); - return NULL; -} - -static int __init build_one_resource(struct device_node *parent, - struct of_bus *bus, - struct of_bus *pbus, - u32 *addr, - int na, int ns, int pna) -{ - const u32 *ranges; - int rone, rlen; - - ranges = of_get_property(parent, "ranges", &rlen); - if (ranges == NULL || rlen == 0) { - u32 result[OF_MAX_ADDR_CELLS]; - int i; - - memset(result, 0, pna * 4); - for (i = 0; i < na; i++) - result[pna - 1 - i] = - addr[na - 1 - i]; - - memcpy(addr, result, pna * 4); - return 0; - } - - /* Now walk through the ranges */ - rlen /= 4; - rone = na + pna + ns; - for (; rlen >= rone; rlen -= rone, ranges += rone) { - if (!bus->map(addr, ranges, na, ns, pna)) - return 0; - } - - /* When we miss an I/O space match on PCI, just pass it up - * to the next PCI bridge and/or controller. - */ - if (!strcmp(bus->name, "pci") && - (addr[0] & 0x03000000) == 0x01000000) - return 0; - - return 1; -} - -static int __init use_1to1_mapping(struct device_node *pp) -{ - /* If we have a ranges property in the parent, use it. */ - if (of_find_property(pp, "ranges", NULL) != NULL) - return 0; - - /* If the parent is the dma node of an ISA bus, pass - * the translation up to the root. - * - * Some SBUS devices use intermediate nodes to express - * hierarchy within the device itself. These aren't - * real bus nodes, and don't have a 'ranges' property. - * But, we should still pass the translation work up - * to the SBUS itself. - */ - if (!strcmp(pp->name, "dma") || - !strcmp(pp->name, "espdma") || - !strcmp(pp->name, "ledma") || - !strcmp(pp->name, "lebuffer")) - return 0; - - /* Similarly for all PCI bridges, if we get this far - * it lacks a ranges property, and this will include - * cases like Simba. - */ - if (!strcmp(pp->name, "pci")) - return 0; - - return 1; -} - -static int of_resource_verbose; - -static void __init build_device_resources(struct of_device *op, - struct device *parent) -{ - struct of_device *p_op; - struct of_bus *bus; - int na, ns; - int index, num_reg; - const void *preg; - - if (!parent) - return; - - p_op = to_of_device(parent); - bus = of_match_bus(p_op->node); - bus->count_cells(op->node, &na, &ns); - - preg = of_get_property(op->node, bus->addr_prop_name, &num_reg); - if (!preg || num_reg == 0) - return; - - /* Convert to num-cells. */ - num_reg /= 4; - - /* Convert to num-entries. */ - num_reg /= na + ns; - - /* Prevent overrunning the op->resources[] array. */ - if (num_reg > PROMREG_MAX) { - printk(KERN_WARNING "%s: Too many regs (%d), " - "limiting to %d.\n", - op->node->full_name, num_reg, PROMREG_MAX); - num_reg = PROMREG_MAX; - } - - for (index = 0; index < num_reg; index++) { - struct resource *r = &op->resource[index]; - u32 addr[OF_MAX_ADDR_CELLS]; - const u32 *reg = (preg + (index * ((na + ns) * 4))); - struct device_node *dp = op->node; - struct device_node *pp = p_op->node; - struct of_bus *pbus, *dbus; - u64 size, result = OF_BAD_ADDR; - unsigned long flags; - int dna, dns; - int pna, pns; - - size = of_read_addr(reg + na, ns); - memcpy(addr, reg, na * 4); - - flags = bus->get_flags(addr, 0); - - if (use_1to1_mapping(pp)) { - result = of_read_addr(addr, na); - goto build_res; - } - - dna = na; - dns = ns; - dbus = bus; - - while (1) { - dp = pp; - pp = dp->parent; - if (!pp) { - result = of_read_addr(addr, dna); - break; - } - - pbus = of_match_bus(pp); - pbus->count_cells(dp, &pna, &pns); - - if (build_one_resource(dp, dbus, pbus, addr, - dna, dns, pna)) - break; - - flags = pbus->get_flags(addr, flags); - - dna = pna; - dns = pns; - dbus = pbus; - } - - build_res: - memset(r, 0, sizeof(*r)); - - if (of_resource_verbose) - printk("%s reg[%d] -> %lx\n", - op->node->full_name, index, - result); - - if (result != OF_BAD_ADDR) { - if (tlb_type == hypervisor) - result &= 0x0fffffffffffffffUL; - - r->start = result; - r->end = result + size - 1; - r->flags = flags; - } - r->name = op->node->name; - } -} - -static struct device_node * __init -apply_interrupt_map(struct device_node *dp, struct device_node *pp, - const u32 *imap, int imlen, const u32 *imask, - unsigned int *irq_p) -{ - struct device_node *cp; - unsigned int irq = *irq_p; - struct of_bus *bus; - phandle handle; - const u32 *reg; - int na, num_reg, i; - - bus = of_match_bus(pp); - bus->count_cells(dp, &na, NULL); - - reg = of_get_property(dp, "reg", &num_reg); - if (!reg || !num_reg) - return NULL; - - imlen /= ((na + 3) * 4); - handle = 0; - for (i = 0; i < imlen; i++) { - int j; - - for (j = 0; j < na; j++) { - if ((reg[j] & imask[j]) != imap[j]) - goto next; - } - if (imap[na] == irq) { - handle = imap[na + 1]; - irq = imap[na + 2]; - break; - } - - next: - imap += (na + 3); - } - if (i == imlen) { - /* Psycho and Sabre PCI controllers can have 'interrupt-map' - * properties that do not include the on-board device - * interrupts. Instead, the device's 'interrupts' property - * is already a fully specified INO value. - * - * Handle this by deciding that, if we didn't get a - * match in the parent's 'interrupt-map', and the - * parent is an IRQ translater, then use the parent as - * our IRQ controller. - */ - if (pp->irq_trans) - return pp; - - return NULL; - } - - *irq_p = irq; - cp = of_find_node_by_phandle(handle); - - return cp; -} - -static unsigned int __init pci_irq_swizzle(struct device_node *dp, - struct device_node *pp, - unsigned int irq) -{ - const struct linux_prom_pci_registers *regs; - unsigned int bus, devfn, slot, ret; - - if (irq < 1 || irq > 4) - return irq; - - regs = of_get_property(dp, "reg", NULL); - if (!regs) - return irq; - - bus = (regs->phys_hi >> 16) & 0xff; - devfn = (regs->phys_hi >> 8) & 0xff; - slot = (devfn >> 3) & 0x1f; - - if (pp->irq_trans) { - /* Derived from Table 8-3, U2P User's Manual. This branch - * is handling a PCI controller that lacks a proper set of - * interrupt-map and interrupt-map-mask properties. The - * Ultra-E450 is one example. - * - * The bit layout is BSSLL, where: - * B: 0 on bus A, 1 on bus B - * D: 2-bit slot number, derived from PCI device number as - * (dev - 1) for bus A, or (dev - 2) for bus B - * L: 2-bit line number - */ - if (bus & 0x80) { - /* PBM-A */ - bus = 0x00; - slot = (slot - 1) << 2; - } else { - /* PBM-B */ - bus = 0x10; - slot = (slot - 2) << 2; - } - irq -= 1; - - ret = (bus | slot | irq); - } else { - /* Going through a PCI-PCI bridge that lacks a set of - * interrupt-map and interrupt-map-mask properties. - */ - ret = ((irq - 1 + (slot & 3)) & 3) + 1; - } - - return ret; -} - -static int of_irq_verbose; - -static unsigned int __init build_one_device_irq(struct of_device *op, - struct device *parent, - unsigned int irq) -{ - struct device_node *dp = op->node; - struct device_node *pp, *ip; - unsigned int orig_irq = irq; - int nid; - - if (irq == 0xffffffff) - return irq; - - if (dp->irq_trans) { - irq = dp->irq_trans->irq_build(dp, irq, - dp->irq_trans->data); - - if (of_irq_verbose) - printk("%s: direct translate %x --> %x\n", - dp->full_name, orig_irq, irq); - - goto out; - } - - /* Something more complicated. Walk up to the root, applying - * interrupt-map or bus specific translations, until we hit - * an IRQ translator. - * - * If we hit a bus type or situation we cannot handle, we - * stop and assume that the original IRQ number was in a - * format which has special meaning to it's immediate parent. - */ - pp = dp->parent; - ip = NULL; - while (pp) { - const void *imap, *imsk; - int imlen; - - imap = of_get_property(pp, "interrupt-map", &imlen); - imsk = of_get_property(pp, "interrupt-map-mask", NULL); - if (imap && imsk) { - struct device_node *iret; - int this_orig_irq = irq; - - iret = apply_interrupt_map(dp, pp, - imap, imlen, imsk, - &irq); - - if (of_irq_verbose) - printk("%s: Apply [%s:%x] imap --> [%s:%x]\n", - op->node->full_name, - pp->full_name, this_orig_irq, - (iret ? iret->full_name : "NULL"), irq); - - if (!iret) - break; - - if (iret->irq_trans) { - ip = iret; - break; - } - } else { - if (!strcmp(pp->name, "pci")) { - unsigned int this_orig_irq = irq; - - irq = pci_irq_swizzle(dp, pp, irq); - if (of_irq_verbose) - printk("%s: PCI swizzle [%s] " - "%x --> %x\n", - op->node->full_name, - pp->full_name, this_orig_irq, - irq); - - } - - if (pp->irq_trans) { - ip = pp; - break; - } - } - dp = pp; - pp = pp->parent; - } - if (!ip) - return orig_irq; - - irq = ip->irq_trans->irq_build(op->node, irq, - ip->irq_trans->data); - if (of_irq_verbose) - printk("%s: Apply IRQ trans [%s] %x --> %x\n", - op->node->full_name, ip->full_name, orig_irq, irq); - -out: - nid = of_node_to_nid(dp); - if (nid != -1) { - cpumask_t numa_mask = node_to_cpumask(nid); - - irq_set_affinity(irq, &numa_mask); - } - - return irq; -} - -static struct of_device * __init scan_one_device(struct device_node *dp, - struct device *parent) -{ - struct of_device *op = kzalloc(sizeof(*op), GFP_KERNEL); - const unsigned int *irq; - struct dev_archdata *sd; - int len, i; - - if (!op) - return NULL; - - sd = &op->dev.archdata; - sd->prom_node = dp; - sd->op = op; - - op->node = dp; - - op->clock_freq = of_getintprop_default(dp, "clock-frequency", - (25*1000*1000)); - op->portid = of_getintprop_default(dp, "upa-portid", -1); - if (op->portid == -1) - op->portid = of_getintprop_default(dp, "portid", -1); - - irq = of_get_property(dp, "interrupts", &len); - if (irq) { - memcpy(op->irqs, irq, len); - op->num_irqs = len / 4; - } else { - op->num_irqs = 0; - } - - /* Prevent overrunning the op->irqs[] array. */ - if (op->num_irqs > PROMINTR_MAX) { - printk(KERN_WARNING "%s: Too many irqs (%d), " - "limiting to %d.\n", - dp->full_name, op->num_irqs, PROMINTR_MAX); - op->num_irqs = PROMINTR_MAX; - } - - build_device_resources(op, parent); - for (i = 0; i < op->num_irqs; i++) - op->irqs[i] = build_one_device_irq(op, parent, op->irqs[i]); - - op->dev.parent = parent; - op->dev.bus = &of_platform_bus_type; - if (!parent) - dev_set_name(&op->dev, "root"); - else - dev_set_name(&op->dev, "%08x", dp->node); - - if (of_device_register(op)) { - printk("%s: Could not register of device.\n", - dp->full_name); - kfree(op); - op = NULL; - } - - return op; -} - -static void __init scan_tree(struct device_node *dp, struct device *parent) -{ - while (dp) { - struct of_device *op = scan_one_device(dp, parent); - - if (op) - scan_tree(dp->child, &op->dev); - - dp = dp->sibling; - } -} - -static void __init scan_of_devices(void) -{ - struct device_node *root = of_find_node_by_path("/"); - struct of_device *parent; - - parent = scan_one_device(root, NULL); - if (!parent) - return; - - scan_tree(root->child, &parent->dev); -} - -static int __init of_bus_driver_init(void) -{ - int err; - - err = of_bus_type_init(&of_platform_bus_type, "of"); - if (!err) - scan_of_devices(); - - return err; -} - -postcore_initcall(of_bus_driver_init); - -static int __init of_debug(char *str) -{ - int val = 0; - - get_option(&str, &val); - if (val & 1) - of_resource_verbose = 1; - if (val & 2) - of_irq_verbose = 1; - return 1; -} - -__setup("of_debug=", of_debug); |