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-rw-r--r--arch/powerpc/platforms/celleb/pci.c481
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 00000000000..98de836dfed
--- /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)
+{
+ __le16 *p = addr;
+ return le16_to_cpu(*p);
+}
+
+static inline u32 celleb_fake_config_readl(void *addr)
+{
+ __le32 *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)
+{
+ __le16 val16;
+ __le16 *p = addr;
+ val16 = cpu_to_le16(val);
+ *p = val16;
+}
+
+static inline void celleb_fake_config_writel(u32 val, void *addr)
+{
+ __le32 val32;
+ __le32 *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;
+}
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