patch-2.1.124 linux/arch/sparc/kernel/ebus.c

• Lines: 329
• Date: Sun Oct 4 10:22:42 1998
• Orig file: v2.1.123/linux/arch/sparc/kernel/ebus.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.123/linux/arch/sparc/kernel/ebus.c linux/arch/sparc/kernel/ebus.c
@@ -0,0 +1,328 @@
+/* $Id: ebus.c,v 1.1 1998/09/18 10:43:43 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);
+		    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
+}