1 files changed, 481 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/celleb/pci.c b/arch/powerpc/platforms/celleb/pci.c
new file mode 100644
index 000000000000..867f83a7d0c9
--- /dev/null
+++ b/arch/powerpc/platforms/celleb/pci.c
@@ -0,0 +1,481 @@
+/*
+ * Support for PCI on Celleb platform.
+ *
+ * (C) Copyright 2006-2007 TOSHIBA CORPORATION
+ *
+ * This code is based on arch/powerpc/kernel/rtas_pci.c:
+ *  Copyright (C) 2001 Dave Engebretsen, IBM Corporation
+ *  Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#undef DEBUG
+
+#include <linux/kernel.h>
+#include <linux/threads.h>
+#include <linux/pci.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <linux/pci_regs.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/prom.h>
+#include <asm/machdep.h>
+#include <asm/pci-bridge.h>
+#include <asm/ppc-pci.h>
+
+#include "pci.h"
+#include "interrupt.h"
+
+#define MAX_PCI_DEVICES    32
+#define MAX_PCI_FUNCTIONS   8
+#define MAX_PCI_BASE_ADDRS  3 /* use 64 bit address */
+
+/* definition for fake pci configuration area for GbE, .... ,and etc. */
+
+struct celleb_pci_resource {
+	struct resource r[MAX_PCI_BASE_ADDRS];
+};
+
+struct celleb_pci_private {
+	unsigned char *fake_config[MAX_PCI_DEVICES][MAX_PCI_FUNCTIONS];
+	struct celleb_pci_resource *res[MAX_PCI_DEVICES][MAX_PCI_FUNCTIONS];
+};
+
+static inline u8 celleb_fake_config_readb(void *addr)
+{
+	u8 *p = addr;
+	return *p;
+}
+
+static inline u16 celleb_fake_config_readw(void *addr)
+{
+	u16 *p = addr;
+	return le16_to_cpu(*p);
+}
+
+static inline u32 celleb_fake_config_readl(void *addr)
+{
+	u32 *p = addr;
+	return le32_to_cpu(*p);
+}
+
+static inline void celleb_fake_config_writeb(u32 val, void *addr)
+{
+	u8 *p = addr;
+	*p = val;
+}
+
+static inline void celleb_fake_config_writew(u32 val, void *addr)
+{
+	u16 val16;
+	u16 *p = addr;
+	val16 = cpu_to_le16(val);
+	*p = val16;
+}
+
+static inline void celleb_fake_config_writel(u32 val, void *addr)
+{
+	u32 val32;
+	u32 *p = addr;
+	val32 = cpu_to_le32(val);
+	*p = val32;
+}
+
+static unsigned char *get_fake_config_start(struct pci_controller *hose,
+					    int devno, int fn)
+{
+	struct celleb_pci_private *private = hose->private_data;
+
+	if (private == NULL)
+		return NULL;
+
+	return private->fake_config[devno][fn];
+}
+
+static struct celleb_pci_resource *get_resource_start(
+				struct pci_controller *hose,
+				int devno, int fn)
+{
+	struct celleb_pci_private *private = hose->private_data;
+
+	if (private == NULL)
+		return NULL;
+
+	return private->res[devno][fn];
+}
+
+
+static void celleb_config_read_fake(unsigned char *config, int where,
+				    int size, u32 *val)
+{
+	char *p = config + where;
+
+	switch (size) {
+	case 1:
+		*val = celleb_fake_config_readb(p);
+		break;
+	case 2:
+		*val = celleb_fake_config_readw(p);
+		break;
+	case 4:
+		*val = celleb_fake_config_readl(p);
+		break;
+	}
+
+	return;
+}
+
+static void celleb_config_write_fake(unsigned char *config, int where,
+				     int size, u32 val)
+{
+	char *p = config + where;
+
+	switch (size) {
+	case 1:
+		celleb_fake_config_writeb(val, p);
+		break;
+	case 2:
+		celleb_fake_config_writew(val, p);
+		break;
+	case 4:
+		celleb_fake_config_writel(val, p);
+		break;
+	}
+	return;
+}
+
+static int celleb_fake_pci_read_config(struct pci_bus *bus,
+		unsigned int devfn, int where, int size, u32 *val)
+{
+	char *config;
+	struct device_node *node;
+	struct pci_controller *hose;
+	unsigned int devno = devfn >> 3;
+	unsigned int fn = devfn & 0x7;
+
+	/* allignment check */
+	BUG_ON(where % size);
+
+	pr_debug("    fake read: bus=0x%x, ", bus->number);
+	node = (struct device_node *)bus->sysdata;
+	hose = pci_find_hose_for_OF_device(node);
+	config = get_fake_config_start(hose, devno, fn);
+
+	pr_debug("devno=0x%x, where=0x%x, size=0x%x, ", devno, where, size);
+	if (!config) {
+		pr_debug("failed\n");
+		return PCIBIOS_DEVICE_NOT_FOUND;
+	}
+
+	celleb_config_read_fake(config, where, size, val);
+	pr_debug("val=0x%x\n", *val);
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+
+static int celleb_fake_pci_write_config(struct pci_bus *bus,
+		 unsigned int devfn, int where, int size, u32 val)
+{
+	char *config;
+	struct device_node *node;
+	struct pci_controller *hose;
+	struct celleb_pci_resource *res;
+	unsigned int devno = devfn >> 3;
+	unsigned int fn = devfn & 0x7;
+
+	/* allignment check */
+	BUG_ON(where % size);
+
+	node = (struct device_node *)bus->sysdata;
+	hose = pci_find_hose_for_OF_device(node);
+	config = get_fake_config_start(hose, devno, fn);
+
+	if (!config)
+		return PCIBIOS_DEVICE_NOT_FOUND;
+
+	if (val == ~0) {
+		int i = (where - PCI_BASE_ADDRESS_0) >> 3;
+
+		switch (where) {
+		case PCI_BASE_ADDRESS_0:
+		case PCI_BASE_ADDRESS_2:
+			if (size != 4)
+				return PCIBIOS_DEVICE_NOT_FOUND;
+			res = get_resource_start(hose, devno, fn);
+			if (!res)
+				return PCIBIOS_DEVICE_NOT_FOUND;
+			celleb_config_write_fake(config, where, size,
+					(res->r[i].end - res->r[i].start));
+			return PCIBIOS_SUCCESSFUL;
+		case PCI_BASE_ADDRESS_1:
+		case PCI_BASE_ADDRESS_3:
+		case PCI_BASE_ADDRESS_4:
+		case PCI_BASE_ADDRESS_5:
+			break;
+		default:
+			break;
+		}
+	}
+
+	celleb_config_write_fake(config, where, size, val);
+	pr_debug("    fake write: where=%x, size=%d, val=%x\n",
+		 where, size, val);
+
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static struct pci_ops celleb_fake_pci_ops = {
+	celleb_fake_pci_read_config,
+	celleb_fake_pci_write_config
+};
+
+static inline void celleb_setup_pci_base_addrs(struct pci_controller *hose,
+					unsigned int devno, unsigned int fn,
+					unsigned int num_base_addr)
+{
+	u32 val;
+	unsigned char *config;
+	struct celleb_pci_resource *res;
+
+	config = get_fake_config_start(hose, devno, fn);
+	res = get_resource_start(hose, devno, fn);
+
+	if (!config || !res)
+		return;
+
+	switch (num_base_addr) {
+	case 3:
+		val = (res->r[2].start & 0xfffffff0)
+		    | PCI_BASE_ADDRESS_MEM_TYPE_64;
+		celleb_config_write_fake(config, PCI_BASE_ADDRESS_4, 4, val);
+		val = res->r[2].start >> 32;
+		celleb_config_write_fake(config, PCI_BASE_ADDRESS_5, 4, val);
+		/* FALLTHROUGH */
+	case 2:
+		val = (res->r[1].start & 0xfffffff0)
+		    | PCI_BASE_ADDRESS_MEM_TYPE_64;
+		celleb_config_write_fake(config, PCI_BASE_ADDRESS_2, 4, val);
+		val = res->r[1].start >> 32;
+		celleb_config_write_fake(config, PCI_BASE_ADDRESS_3, 4, val);
+		/* FALLTHROUGH */
+	case 1:
+		val = (res->r[0].start & 0xfffffff0)
+		    | PCI_BASE_ADDRESS_MEM_TYPE_64;
+		celleb_config_write_fake(config, PCI_BASE_ADDRESS_0, 4, val);
+		val = res->r[0].start >> 32;
+		celleb_config_write_fake(config, PCI_BASE_ADDRESS_1, 4, val);
+		break;
+	}
+
+	val = PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
+	celleb_config_write_fake(config, PCI_COMMAND, 2, val);
+}
+
+static int __devinit celleb_setup_fake_pci_device(struct device_node *node,
+						  struct pci_controller *hose)
+{
+	unsigned int rlen;
+	int num_base_addr = 0;
+	u32 val;
+	const u32 *wi0, *wi1, *wi2, *wi3, *wi4;
+	unsigned int devno, fn;
+	struct celleb_pci_private *private = hose->private_data;
+	unsigned char **config = NULL;
+	struct celleb_pci_resource **res = NULL;
+	const char *name;
+	const unsigned long *li;
+	int size, result;
+
+	if (private == NULL) {
+		printk(KERN_ERR "PCI: "
+		       "memory space for pci controller is not assigned\n");
+		goto error;
+	}
+
+	name = get_property(node, "model", &rlen);
+	if (!name) {
+		printk(KERN_ERR "PCI: model property not found.\n");
+		goto error;
+	}
+
+	wi4 = get_property(node, "reg", &rlen);
+	if (wi4 == NULL)
+		goto error;
+
+	devno = ((wi4[0] >> 8) & 0xff) >> 3;
+	fn = (wi4[0] >> 8) & 0x7;
+
+	pr_debug("PCI: celleb_setup_fake_pci() %s devno=%x fn=%x\n", name,
+		 devno, fn);
+
+	size = 256;
+	config = &private->fake_config[devno][fn];
+	if (mem_init_done)
+		*config = kzalloc(size, GFP_KERNEL);
+	else
+		*config = alloc_bootmem(size);
+	if (*config == NULL) {
+		printk(KERN_ERR "PCI: "
+		       "not enough memory for fake configuration space\n");
+		goto error;
+	}
+	pr_debug("PCI: fake config area assigned 0x%016lx\n",
+		 (unsigned long)*config);
+
+	size = sizeof(struct celleb_pci_resource);
+	res = &private->res[devno][fn];
+	if (mem_init_done)
+		*res = kzalloc(size, GFP_KERNEL);
+	else
+		*res = alloc_bootmem(size);
+	if (*res == NULL) {
+		printk(KERN_ERR
+		       "PCI: not enough memory for resource data space\n");
+		goto error;
+	}
+	pr_debug("PCI: res assigned 0x%016lx\n", (unsigned long)*res);
+
+	wi0 = get_property(node, "device-id", NULL);
+	wi1 = get_property(node, "vendor-id", NULL);
+	wi2 = get_property(node, "class-code", NULL);
+	wi3 = get_property(node, "revision-id", NULL);
+
+	celleb_config_write_fake(*config, PCI_DEVICE_ID, 2, wi0[0] & 0xffff);
+	celleb_config_write_fake(*config, PCI_VENDOR_ID, 2, wi1[0] & 0xffff);
+	pr_debug("class-code = 0x%08x\n", wi2[0]);
+
+	celleb_config_write_fake(*config, PCI_CLASS_PROG, 1, wi2[0] & 0xff);
+	celleb_config_write_fake(*config, PCI_CLASS_DEVICE, 2,
+				 (wi2[0] >> 8) & 0xffff);
+	celleb_config_write_fake(*config, PCI_REVISION_ID, 1, wi3[0]);
+
+	while (num_base_addr < MAX_PCI_BASE_ADDRS) {
+		result = of_address_to_resource(node,
+				num_base_addr, &(*res)->r[num_base_addr]);
+		if (result)
+			break;
+		num_base_addr++;
+	}
+
+	celleb_setup_pci_base_addrs(hose, devno, fn, num_base_addr);
+
+	li = get_property(node, "interrupts", &rlen);
+	val = li[0];
+	celleb_config_write_fake(*config, PCI_INTERRUPT_PIN, 1, 1);
+	celleb_config_write_fake(*config, PCI_INTERRUPT_LINE, 1, val);
+
+#ifdef DEBUG
+	pr_debug("PCI: %s irq=%ld\n", name, li[0]);
+	for (i = 0; i < 6; i++) {
+		celleb_config_read_fake(*config,
+					PCI_BASE_ADDRESS_0 + 0x4 * i, 4,
+					&val);
+		pr_debug("PCI: %s fn=%d base_address_%d=0x%x\n",
+			 name, fn, i, val);
+	}
+#endif
+
+	celleb_config_write_fake(*config, PCI_HEADER_TYPE, 1,
+				 PCI_HEADER_TYPE_NORMAL);
+
+	return 0;
+
+error:
+	if (mem_init_done) {
+		if (config && *config)
+			kfree(*config);
+		if (res && *res)
+			kfree(*res);
+
+	} else {
+		if (config && *config) {
+			size = 256;
+			free_bootmem((unsigned long)(*config), size);
+		}
+		if (res && *res) {
+			size = sizeof(struct celleb_pci_resource);
+			free_bootmem((unsigned long)(*res), size);
+		}
+	}
+
+	return 1;
+}
+
+static int __devinit phb_set_bus_ranges(struct device_node *dev,
+					struct pci_controller *phb)
+{
+	const int *bus_range;
+	unsigned int len;
+
+	bus_range = get_property(dev, "bus-range", &len);
+	if (bus_range == NULL || len < 2 * sizeof(int))
+		return 1;
+
+	phb->first_busno = bus_range[0];
+	phb->last_busno = bus_range[1];
+
+	return 0;
+}
+
+static void __devinit celleb_alloc_private_mem(struct pci_controller *hose)
+{
+	if (mem_init_done)
+		hose->private_data =
+			kzalloc(sizeof(struct celleb_pci_private), GFP_KERNEL);
+	else
+		hose->private_data =
+			alloc_bootmem(sizeof(struct celleb_pci_private));
+}
+
+int __devinit celleb_setup_phb(struct pci_controller *phb)
+{
+	const char *name;
+	struct device_node *dev = phb->arch_data;
+	struct device_node *node;
+	unsigned int rlen;
+
+	name = get_property(dev, "name", &rlen);
+	if (!name)
+		return 1;
+
+	pr_debug("PCI: celleb_setup_phb() %s\n", name);
+	phb_set_bus_ranges(dev, phb);
+
+	if (strcmp(name, "epci") == 0) {
+		phb->ops = &celleb_epci_ops;
+		return celleb_setup_epci(dev, phb);
+
+	} else if (strcmp(name, "pci-pseudo") == 0) {
+		phb->ops = &celleb_fake_pci_ops;
+		celleb_alloc_private_mem(phb);
+		for (node = of_get_next_child(dev, NULL);
+		     node != NULL; node = of_get_next_child(dev, node))
+			celleb_setup_fake_pci_device(node, phb);
+
+	} else
+		return 1;
+
+	return 0;
+}
+
+int celleb_pci_probe_mode(struct pci_bus *bus)
+{
+	return PCI_PROBE_DEVTREE;
+}