summaryrefslogtreecommitdiffstats
path: root/arch/sparc/kernel/ebus.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/sparc/kernel/ebus.c')
-rw-r--r--arch/sparc/kernel/ebus.c331
1 files changed, 331 insertions, 0 deletions
diff --git a/arch/sparc/kernel/ebus.c b/arch/sparc/kernel/ebus.c
new file mode 100644
index 000000000..7c3eda88e
--- /dev/null
+++ b/arch/sparc/kernel/ebus.c
@@ -0,0 +1,331 @@
+/* $Id: ebus.c,v 1.2 1998/10/07 11:35:16 jj 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.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/malloc.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>
+
+#undef PROM_DEBUG
+#undef DEBUG_FILL_EBUS_DEV
+
+#ifdef PROM_DEBUG
+#define dprintf prom_printf
+#else
+#define dprintf printk
+#endif
+
+struct linux_ebus *ebus_chain = 0;
+
+#ifdef CONFIG_SUN_OPENPROMIO
+extern int openprom_init(void);
+#endif
+#ifdef CONFIG_SPARCAUDIO
+extern int sparcaudio_init(void);
+#endif
+#ifdef CONFIG_SUN_AUXIO
+extern void auxio_probe(void);
+#endif
+#ifdef CONFIG_OBP_FLASH
+extern int flash_init(void);
+#endif
+#ifdef CONFIG_ENVCTRL
+extern int envctrl_init(void);
+#endif
+
+static inline unsigned long ebus_alloc(size_t size)
+{
+ return (unsigned long)kmalloc(size, GFP_ATOMIC);
+}
+
+__initfunc(void 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));
+ 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->base_address[i] = dev->parent->base_address[regs[i]];
+ }
+
+ len = prom_getproperty(node, "interrupts", (char *)&irqs, sizeof(irqs));
+ if ((len == -1) || (len == 0)) {
+ dev->num_irqs = 0;
+ /*
+ * Oh, well, some PROMs don't export interrupts
+ * property to children of EBus devices...
+ *
+ * Be smart about PS/2 keyboard and mouse.
+ */
+ if (!strcmp(dev->parent->prom_name, "8042")) {
+ dev->num_irqs = 1;
+ dev->irqs[0] = dev->parent->irqs[0];
+ }
+ } else {
+ dev->num_irqs = len / sizeof(irqs[0]);
+ printk("FIXME: %s irq(%d)\n", dev->prom_name, irqs[0]);
+ }
+
+#ifdef DEBUG_FILL_EBUS_DEV
+ dprintk("child '%s': address%s\n", dev->prom_name,
+ dev->num_addrs > 1 ? "es" : "");
+ for (i = 0; i < dev->num_addrs; i++)
+ dprintk(" %016lx\n", dev->base_address[i]);
+ if (dev->num_irqs) {
+ dprintk(" IRQ%s", dev->num_irqs > 1 ? "s" : "");
+ for (i = 0; i < dev->num_irqs; i++)
+ dprintk(" %08x", dev->irqs[i]);
+ dprintk("\n");
+ }
+#endif
+}
+
+__initfunc(void 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;
+
+ 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++) {
+ n = (regs[i].which_io - 0x10) >> 2;
+
+ dev->base_address[i] = dev->bus->self->base_address[n];
+ dev->base_address[i] += regs[i].phys_addr;
+
+ if (dev->base_address[i]) {
+ dev->base_address[i] =
+ (unsigned long)sparc_alloc_io (dev->base_address[i], 0,
+ regs[i].reg_size,
+ dev->prom_name, 0, 0);
+ /* Some drivers call 'check_region', so we release it */
+ release_region(dev->base_address[i] & PAGE_MASK, PAGE_SIZE);
+
+ if (dev->base_address[i] == 0 ) {
+ panic("ebus: unable sparc_alloc_io for dev %s",
+ dev->prom_name);
+ }
+ }
+ }
+
+ len = prom_getproperty(node, "interrupts", (char *)&irqs, sizeof(irqs));
+ if ((len == -1) || (len == 0)) {
+ dev->num_irqs = 0;
+ } else {
+ dev->num_irqs = len / sizeof(irqs[0]);
+
+#define IRQ_8042 7
+ if (irqs[0] == 4) dev->irqs[0] = IRQ_8042;
+ printk("FIXME: %s irq(%d)\n", dev->prom_name, irqs[0]);
+ }
+
+#ifdef DEBUG_FILL_EBUS_DEV
+ dprintk("'%s': address%s\n", dev->prom_name,
+ dev->num_addrs > 1 ? "es" : "");
+ for (i = 0; i < dev->num_addrs; i++)
+ dprintk(" %016lx\n", dev->base_address[i]);
+ if (dev->num_irqs) {
+ dprintk(" IRQ%s", dev->num_irqs > 1 ? "s" : "");
+ for (i = 0; i < dev->num_irqs; i++)
+ dprintk(" %08x", dev->irqs[i]);
+ dprintk("\n");
+ }
+#endif
+ 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, &regs[0], child);
+
+ while ((node = prom_getsibling(node))) {
+ 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, &regs[0], child);
+ }
+ }
+}
+
+__initfunc(void 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 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;
+
+ if (!pci_present())
+ return;
+
+ pdev = pci_find_device(PCI_VENDOR_ID_SUN, PCI_DEVICE_ID_SUN_EBUS, 0);
+ if (!pdev) {
+#ifdef PROM_DEBUG
+ dprintk("ebus: No EBus's found.\n");
+#endif
+ 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) {
+#ifdef PROM_DEBUG
+ dprintk("ebus%d:", num_ebus);
+#endif
+
+ 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->base_address[0];
+ for (reg = 0; reg < nreg; reg++) {
+ if (!(regs[reg].which_io & 0x03000000))
+ continue;
+
+ addr = regs[reg].phys_lo;
+ *base++ = addr;
+#ifdef PROM_DEBUG
+ dprintk(" %lx[%x]", addr, regs[reg].size_lo);
+#endif
+ }
+#ifdef PROM_DEBUG
+ dprintk("\n");
+#endif
+
+ 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))) {
+ 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_find_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;
+ }
+
+#ifdef CONFIG_SUN_OPENPROMIO
+ openprom_init();
+#endif
+
+#ifdef CONFIG_SPARCAUDIO
+ sparcaudio_init();
+#endif
+#ifdef CONFIG_SUN_BPP
+ bpp_init();
+#endif
+#ifdef CONFIG_SUN_AUXIO
+ auxio_probe();
+#endif
+#ifdef CONFIG_ENVCTRL
+ envctrl_init();
+#endif
+#ifdef CONFIG_OBP_FLASH
+ flash_init();
+#endif
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 08:52:01 +0000