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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 00:20:36 +0200 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 00:20:36 +0200 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/sparc/kernel/ebus.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-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 'arch/sparc/kernel/ebus.c')
-rw-r--r-- | arch/sparc/kernel/ebus.c | 361 |
1 files changed, 361 insertions, 0 deletions
diff --git a/arch/sparc/kernel/ebus.c b/arch/sparc/kernel/ebus.c new file mode 100644 index 000000000000..1754192c69d0 --- /dev/null +++ b/arch/sparc/kernel/ebus.c @@ -0,0 +1,361 @@ +/* $Id: ebus.c,v 1.20 2002/01/05 01:13:43 davem Exp $ + * ebus.c: PCI to EBus bridge device. + * + * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be) + * + * Adopted for sparc by V. Roganov and G. Raiko. + * Fixes for different platforms by Pete Zaitcev. + */ + +#include <linux/config.h> +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/string.h> + +#include <asm/system.h> +#include <asm/page.h> +#include <asm/pbm.h> +#include <asm/ebus.h> +#include <asm/io.h> +#include <asm/oplib.h> +#include <asm/bpp.h> + +struct linux_ebus *ebus_chain = 0; + +/* We are together with pcic.c under CONFIG_PCI. */ +extern unsigned int pcic_pin_to_irq(unsigned int, char *name); + +/* + * IRQ Blacklist + * Here we list PROMs and systems that are known to supply crap as IRQ numbers. + */ +struct ebus_device_irq { + char *name; + unsigned int pin; +}; + +struct ebus_system_entry { + char *esname; + struct ebus_device_irq *ipt; +}; + +static struct ebus_device_irq je1_1[] = { + { "8042", 3 }, + { "SUNW,CS4231", 0 }, + { "parallel", 0 }, + { "se", 2 }, + { 0, 0 } +}; + +/* + * Gleb's JE1 supplied reasonable pin numbers, but mine did not (OBP 2.32). + * Blacklist the sucker... Note that Gleb's system will work. + */ +static struct ebus_system_entry ebus_blacklist[] = { + { "SUNW,JavaEngine1", je1_1 }, + { 0, 0 } +}; + +static struct ebus_device_irq *ebus_blackp = NULL; + +/* + */ +static inline unsigned long ebus_alloc(size_t size) +{ + return (unsigned long)kmalloc(size, GFP_ATOMIC); +} + +/* + */ +int __init ebus_blacklist_irq(char *name) +{ + struct ebus_device_irq *dp; + + if ((dp = ebus_blackp) != NULL) { + for (; dp->name != NULL; dp++) { + if (strcmp(name, dp->name) == 0) { + return pcic_pin_to_irq(dp->pin, name); + } + } + } + return 0; +} + +void __init fill_ebus_child(int node, struct linux_prom_registers *preg, + struct linux_ebus_child *dev) +{ + int regs[PROMREG_MAX]; + int irqs[PROMREG_MAX]; + char lbuf[128]; + int i, len; + + dev->prom_node = node; + prom_getstring(node, "name", lbuf, sizeof(lbuf)); + strcpy(dev->prom_name, lbuf); + + len = prom_getproperty(node, "reg", (void *)regs, sizeof(regs)); + if (len == -1) len = 0; + dev->num_addrs = len / sizeof(regs[0]); + + for (i = 0; i < dev->num_addrs; i++) { + if (regs[i] >= dev->parent->num_addrs) { + prom_printf("UGH: property for %s was %d, need < %d\n", + dev->prom_name, len, dev->parent->num_addrs); + panic(__FUNCTION__); + } + dev->resource[i].start = dev->parent->resource[regs[i]].start; /* XXX resource */ + } + + for (i = 0; i < PROMINTR_MAX; i++) + dev->irqs[i] = PCI_IRQ_NONE; + + if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_name)) != 0) { + dev->num_irqs = 1; + } else if ((len = prom_getproperty(node, "interrupts", + (char *)&irqs, sizeof(irqs))) == -1 || len == 0) { + dev->num_irqs = 0; + dev->irqs[0] = 0; + if (dev->parent->num_irqs != 0) { + dev->num_irqs = 1; + dev->irqs[0] = dev->parent->irqs[0]; +/* P3 */ /* printk("EBUS: dev %s irq %d from parent\n", dev->prom_name, dev->irqs[0]); */ + } + } else { + dev->num_irqs = len / sizeof(irqs[0]); + if (irqs[0] == 0 || irqs[0] >= 8) { + /* + * XXX Zero is a valid pin number... + * This works as long as Ebus is not wired to INTA#. + */ + printk("EBUS: %s got bad irq %d from PROM\n", + dev->prom_name, irqs[0]); + dev->num_irqs = 0; + dev->irqs[0] = 0; + } else { + dev->irqs[0] = pcic_pin_to_irq(irqs[0], dev->prom_name); + } + } +} + +void __init fill_ebus_device(int node, struct linux_ebus_device *dev) +{ + struct linux_prom_registers regs[PROMREG_MAX]; + struct linux_ebus_child *child; + int irqs[PROMINTR_MAX]; + char lbuf[128]; + int i, n, len; + unsigned long baseaddr; + + dev->prom_node = node; + prom_getstring(node, "name", lbuf, sizeof(lbuf)); + strcpy(dev->prom_name, lbuf); + + len = prom_getproperty(node, "reg", (void *)regs, sizeof(regs)); + if (len % sizeof(struct linux_prom_registers)) { + prom_printf("UGH: proplen for %s was %d, need multiple of %d\n", + dev->prom_name, len, + (int)sizeof(struct linux_prom_registers)); + panic(__FUNCTION__); + } + dev->num_addrs = len / sizeof(struct linux_prom_registers); + + for (i = 0; i < dev->num_addrs; i++) { + /* + * XXX Collect JE-1 PROM + * + * Example - JS-E with 3.11: + * /ebus + * regs + * 0x00000000, 0x0, 0x00000000, 0x0, 0x00000000, + * 0x82000010, 0x0, 0xf0000000, 0x0, 0x01000000, + * 0x82000014, 0x0, 0x38800000, 0x0, 0x00800000, + * ranges + * 0x00, 0x00000000, 0x02000010, 0x0, 0x0, 0x01000000, + * 0x01, 0x01000000, 0x02000014, 0x0, 0x0, 0x00800000, + * /ebus/8042 + * regs + * 0x00000001, 0x00300060, 0x00000008, + * 0x00000001, 0x00300060, 0x00000008, + */ + n = regs[i].which_io; + if (n >= 4) { + /* XXX This is copied from old JE-1 by Gleb. */ + n = (regs[i].which_io - 0x10) >> 2; + } else { + ; + } + +/* + * XXX Now as we have regions, why don't we make an on-demand allocation... + */ + dev->resource[i].start = 0; + if ((baseaddr = dev->bus->self->resource[n].start + + regs[i].phys_addr) != 0) { + /* dev->resource[i].name = dev->prom_name; */ + if ((baseaddr = (unsigned long) ioremap(baseaddr, + regs[i].reg_size)) == 0) { + panic("ebus: unable to remap dev %s", + dev->prom_name); + } + } + dev->resource[i].start = baseaddr; /* XXX Unaligned */ + } + + for (i = 0; i < PROMINTR_MAX; i++) + dev->irqs[i] = PCI_IRQ_NONE; + + if ((dev->irqs[0] = ebus_blacklist_irq(dev->prom_name)) != 0) { + dev->num_irqs = 1; + } else if ((len = prom_getproperty(node, "interrupts", + (char *)&irqs, sizeof(irqs))) == -1 || len == 0) { + dev->num_irqs = 0; + if ((dev->irqs[0] = dev->bus->self->irq) != 0) { + dev->num_irqs = 1; +/* P3 */ /* printk("EBUS: child %s irq %d from parent\n", dev->prom_name, dev->irqs[0]); */ + } + } else { + dev->num_irqs = 1; /* dev->num_irqs = len / sizeof(irqs[0]); */ + if (irqs[0] == 0 || irqs[0] >= 8) { + /* See above for the parent. XXX */ + printk("EBUS: %s got bad irq %d from PROM\n", + dev->prom_name, irqs[0]); + dev->num_irqs = 0; + dev->irqs[0] = 0; + } else { + dev->irqs[0] = pcic_pin_to_irq(irqs[0], dev->prom_name); + } + } + + if ((node = prom_getchild(node))) { + dev->children = (struct linux_ebus_child *) + ebus_alloc(sizeof(struct linux_ebus_child)); + + child = dev->children; + child->next = 0; + child->parent = dev; + child->bus = dev->bus; + fill_ebus_child(node, ®s[0], child); + + while ((node = prom_getsibling(node)) != 0) { + child->next = (struct linux_ebus_child *) + ebus_alloc(sizeof(struct linux_ebus_child)); + + child = child->next; + child->next = 0; + child->parent = dev; + child->bus = dev->bus; + fill_ebus_child(node, ®s[0], child); + } + } +} + +void __init ebus_init(void) +{ + struct linux_prom_pci_registers regs[PROMREG_MAX]; + struct linux_pbm_info *pbm; + struct linux_ebus_device *dev; + struct linux_ebus *ebus; + struct ebus_system_entry *sp; + struct pci_dev *pdev; + struct pcidev_cookie *cookie; + char lbuf[128]; + unsigned long addr, *base; + unsigned short pci_command; + int nd, len, ebusnd; + int reg, nreg; + int num_ebus = 0; + + prom_getstring(prom_root_node, "name", lbuf, sizeof(lbuf)); + for (sp = ebus_blacklist; sp->esname != NULL; sp++) { + if (strcmp(lbuf, sp->esname) == 0) { + ebus_blackp = sp->ipt; + break; + } + } + + pdev = pci_get_device(PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_EBUS, 0); + if (!pdev) { + return; + } + cookie = pdev->sysdata; + ebusnd = cookie->prom_node; + + ebus_chain = ebus = (struct linux_ebus *) + ebus_alloc(sizeof(struct linux_ebus)); + ebus->next = 0; + + while (ebusnd) { + + prom_getstring(ebusnd, "name", lbuf, sizeof(lbuf)); + ebus->prom_node = ebusnd; + strcpy(ebus->prom_name, lbuf); + ebus->self = pdev; + ebus->parent = pbm = cookie->pbm; + + /* Enable BUS Master. */ + pci_read_config_word(pdev, PCI_COMMAND, &pci_command); + pci_command |= PCI_COMMAND_MASTER; + pci_write_config_word(pdev, PCI_COMMAND, pci_command); + + len = prom_getproperty(ebusnd, "reg", (void *)regs, + sizeof(regs)); + if (len == 0 || len == -1) { + prom_printf("%s: can't find reg property\n", + __FUNCTION__); + prom_halt(); + } + nreg = len / sizeof(struct linux_prom_pci_registers); + + base = &ebus->self->resource[0].start; + for (reg = 0; reg < nreg; reg++) { + if (!(regs[reg].which_io & 0x03000000)) + continue; + + addr = regs[reg].phys_lo; + *base++ = addr; + } + + nd = prom_getchild(ebusnd); + if (!nd) + goto next_ebus; + + ebus->devices = (struct linux_ebus_device *) + ebus_alloc(sizeof(struct linux_ebus_device)); + + dev = ebus->devices; + dev->next = 0; + dev->children = 0; + dev->bus = ebus; + fill_ebus_device(nd, dev); + + while ((nd = prom_getsibling(nd)) != 0) { + dev->next = (struct linux_ebus_device *) + ebus_alloc(sizeof(struct linux_ebus_device)); + + dev = dev->next; + dev->next = 0; + dev->children = 0; + dev->bus = ebus; + fill_ebus_device(nd, dev); + } + + next_ebus: + pdev = pci_get_device(PCI_VENDOR_ID_SUN, + PCI_DEVICE_ID_SUN_EBUS, pdev); + if (!pdev) + break; + + cookie = pdev->sysdata; + ebusnd = cookie->prom_node; + + ebus->next = (struct linux_ebus *) + ebus_alloc(sizeof(struct linux_ebus)); + ebus = ebus->next; + ebus->next = 0; + ++num_ebus; + } + if (pdev) + pci_dev_put(pdev); +} |