[PATCH v4 15/22] sh: Move common PCI stuff to arch/sh/kernel
From: Yoshinori Sato
Date: Wed Jun 29 2016 - 10:02:39 EST
Changes v4
none
Signed-off-by: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
---
arch/sh/drivers/pci/Makefile | 2 -
arch/sh/drivers/pci/common.c | 162 --------------------
arch/sh/drivers/pci/pci.c | 320 ----------------------------------------
arch/sh/kernel/Makefile | 2 +
arch/sh/kernel/pci-common.c | 162 ++++++++++++++++++++
arch/sh/kernel/pci.c | 342 +++++++++++++++++++++++++++++++++++++++++++
6 files changed, 506 insertions(+), 484 deletions(-)
delete mode 100644 arch/sh/drivers/pci/common.c
delete mode 100644 arch/sh/drivers/pci/pci.c
create mode 100644 arch/sh/kernel/pci-common.c
create mode 100644 arch/sh/kernel/pci.c
diff --git a/arch/sh/drivers/pci/Makefile b/arch/sh/drivers/pci/Makefile
index 82f0a33..fffbede 100644
--- a/arch/sh/drivers/pci/Makefile
+++ b/arch/sh/drivers/pci/Makefile
@@ -1,8 +1,6 @@
#
# Makefile for the PCI specific kernel interface routines under Linux.
#
-obj-y += common.o pci.o
-
obj-$(CONFIG_CPU_SUBTYPE_SH7751) += pci-sh7751.o ops-sh4.o
obj-$(CONFIG_CPU_SUBTYPE_SH7751R) += pci-sh7751.o ops-sh4.o
obj-$(CONFIG_CPU_SUBTYPE_SH7763) += pci-sh7780.o ops-sh4.o
diff --git a/arch/sh/drivers/pci/common.c b/arch/sh/drivers/pci/common.c
deleted file mode 100644
index dbf1381..0000000
--- a/arch/sh/drivers/pci/common.c
+++ /dev/null
@@ -1,162 +0,0 @@
-#include <linux/pci.h>
-#include <linux/interrupt.h>
-#include <linux/timer.h>
-#include <linux/kernel.h>
-
-/*
- * These functions are used early on before PCI scanning is done
- * and all of the pci_dev and pci_bus structures have been created.
- */
-static struct pci_dev *fake_pci_dev(struct pci_channel *hose,
- int top_bus, int busnr, int devfn)
-{
- static struct pci_dev dev;
- static struct pci_bus bus;
-
- dev.bus = &bus;
- dev.sysdata = hose;
- dev.devfn = devfn;
- bus.number = busnr;
- bus.sysdata = hose;
- bus.ops = hose->pci_ops;
-
- if(busnr != top_bus)
- /* Fake a parent bus structure. */
- bus.parent = &bus;
- else
- bus.parent = NULL;
-
- return &dev;
-}
-
-#define EARLY_PCI_OP(rw, size, type) \
-int __init early_##rw##_config_##size(struct pci_channel *hose, \
- int top_bus, int bus, int devfn, int offset, type value) \
-{ \
- return pci_##rw##_config_##size( \
- fake_pci_dev(hose, top_bus, bus, devfn), \
- offset, value); \
-}
-
-EARLY_PCI_OP(read, byte, u8 *)
-EARLY_PCI_OP(read, word, u16 *)
-EARLY_PCI_OP(read, dword, u32 *)
-EARLY_PCI_OP(write, byte, u8)
-EARLY_PCI_OP(write, word, u16)
-EARLY_PCI_OP(write, dword, u32)
-
-int __init pci_is_66mhz_capable(struct pci_channel *hose,
- int top_bus, int current_bus)
-{
- u32 pci_devfn;
- unsigned short vid;
- int cap66 = -1;
- u16 stat;
-
- printk(KERN_INFO "PCI: Checking 66MHz capabilities...\n");
-
- for (pci_devfn = 0; pci_devfn < 0xff; pci_devfn++) {
- if (PCI_FUNC(pci_devfn))
- continue;
- if (early_read_config_word(hose, top_bus, current_bus,
- pci_devfn, PCI_VENDOR_ID, &vid) !=
- PCIBIOS_SUCCESSFUL)
- continue;
- if (vid == 0xffff)
- continue;
-
- /* check 66MHz capability */
- if (cap66 < 0)
- cap66 = 1;
- if (cap66) {
- early_read_config_word(hose, top_bus, current_bus,
- pci_devfn, PCI_STATUS, &stat);
- if (!(stat & PCI_STATUS_66MHZ)) {
- printk(KERN_DEBUG
- "PCI: %02x:%02x not 66MHz capable.\n",
- current_bus, pci_devfn);
- cap66 = 0;
- break;
- }
- }
- }
-
- return cap66 > 0;
-}
-
-static void pcibios_enable_err(unsigned long __data)
-{
- struct pci_channel *hose = (struct pci_channel *)__data;
-
- del_timer(&hose->err_timer);
- printk(KERN_DEBUG "PCI: re-enabling error IRQ.\n");
- enable_irq(hose->err_irq);
-}
-
-static void pcibios_enable_serr(unsigned long __data)
-{
- struct pci_channel *hose = (struct pci_channel *)__data;
-
- del_timer(&hose->serr_timer);
- printk(KERN_DEBUG "PCI: re-enabling system error IRQ.\n");
- enable_irq(hose->serr_irq);
-}
-
-void pcibios_enable_timers(struct pci_channel *hose)
-{
- if (hose->err_irq) {
- init_timer(&hose->err_timer);
- hose->err_timer.data = (unsigned long)hose;
- hose->err_timer.function = pcibios_enable_err;
- }
-
- if (hose->serr_irq) {
- init_timer(&hose->serr_timer);
- hose->serr_timer.data = (unsigned long)hose;
- hose->serr_timer.function = pcibios_enable_serr;
- }
-}
-
-/*
- * A simple handler for the regular PCI status errors, called from IRQ
- * context.
- */
-unsigned int pcibios_handle_status_errors(unsigned long addr,
- unsigned int status,
- struct pci_channel *hose)
-{
- unsigned int cmd = 0;
-
- if (status & PCI_STATUS_REC_MASTER_ABORT) {
- printk(KERN_DEBUG "PCI: master abort, pc=0x%08lx\n", addr);
- cmd |= PCI_STATUS_REC_MASTER_ABORT;
- }
-
- if (status & PCI_STATUS_REC_TARGET_ABORT) {
- printk(KERN_DEBUG "PCI: target abort: ");
- pcibios_report_status(PCI_STATUS_REC_TARGET_ABORT |
- PCI_STATUS_SIG_TARGET_ABORT |
- PCI_STATUS_REC_MASTER_ABORT, 1);
- printk("\n");
-
- cmd |= PCI_STATUS_REC_TARGET_ABORT;
- }
-
- if (status & (PCI_STATUS_PARITY | PCI_STATUS_DETECTED_PARITY)) {
- printk(KERN_DEBUG "PCI: parity error detected: ");
- pcibios_report_status(PCI_STATUS_PARITY |
- PCI_STATUS_DETECTED_PARITY, 1);
- printk("\n");
-
- cmd |= PCI_STATUS_PARITY | PCI_STATUS_DETECTED_PARITY;
-
- /* Now back off of the IRQ for awhile */
- if (hose->err_irq) {
- disable_irq_nosync(hose->err_irq);
- hose->err_timer.expires = jiffies + HZ;
- add_timer(&hose->err_timer);
- }
- }
-
- return cmd;
-}
diff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c
deleted file mode 100644
index d5462b7..0000000
--- a/arch/sh/drivers/pci/pci.c
+++ /dev/null
@@ -1,320 +0,0 @@
-/*
- * New-style PCI core.
- *
- * Copyright (c) 2004 - 2009 Paul Mundt
- * Copyright (c) 2002 M. R. Brown
- *
- * Modelled after arch/mips/pci/pci.c:
- * Copyright (C) 2003, 04 Ralf Baechle (ralf@xxxxxxxxxxxxxx)
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/pci.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/dma-debug.h>
-#include <linux/io.h>
-#include <linux/mutex.h>
-#include <linux/spinlock.h>
-#include <linux/export.h>
-
-unsigned long PCIBIOS_MIN_IO = 0x0000;
-unsigned long PCIBIOS_MIN_MEM = 0;
-
-/*
- * The PCI controller list.
- */
-static struct pci_channel *hose_head, **hose_tail = &hose_head;
-
-static int pci_initialized;
-
-static void pcibios_scanbus(struct pci_channel *hose)
-{
- static int next_busno;
- static int need_domain_info;
- LIST_HEAD(resources);
- struct resource *res;
- resource_size_t offset;
- int i;
- struct pci_bus *bus;
-
- for (i = 0; i < hose->nr_resources; i++) {
- res = hose->resources + i;
- offset = 0;
- if (res->flags & IORESOURCE_IO)
- offset = hose->io_offset;
- else if (res->flags & IORESOURCE_MEM)
- offset = hose->mem_offset;
- pci_add_resource_offset(&resources, res, offset);
- }
-
- bus = pci_scan_root_bus(NULL, next_busno, hose->pci_ops, hose,
- &resources);
- hose->bus = bus;
-
- need_domain_info = need_domain_info || hose->index;
- hose->need_domain_info = need_domain_info;
-
- if (!bus) {
- pci_free_resource_list(&resources);
- return;
- }
-
- next_busno = bus->busn_res.end + 1;
- /* Don't allow 8-bit bus number overflow inside the hose -
- reserve some space for bridges. */
- if (next_busno > 224) {
- next_busno = 0;
- need_domain_info = 1;
- }
-
- pci_bus_size_bridges(bus);
- pci_bus_assign_resources(bus);
- pci_bus_add_devices(bus);
-}
-
-/*
- * This interrupt-safe spinlock protects all accesses to PCI
- * configuration space.
- */
-DEFINE_RAW_SPINLOCK(pci_config_lock);
-static DEFINE_MUTEX(pci_scan_mutex);
-
-int register_pci_controller(struct pci_channel *hose)
-{
- int i;
-
- for (i = 0; i < hose->nr_resources; i++) {
- struct resource *res = hose->resources + i;
-
- if (res->flags & IORESOURCE_IO) {
- if (request_resource(&ioport_resource, res) < 0)
- goto out;
- } else {
- if (request_resource(&iomem_resource, res) < 0)
- goto out;
- }
- }
-
- *hose_tail = hose;
- hose_tail = &hose->next;
-
- /*
- * Do not panic here but later - this might happen before console init.
- */
- if (!hose->io_map_base) {
- printk(KERN_WARNING
- "registering PCI controller with io_map_base unset\n");
- }
-
- /*
- * Setup the ERR/PERR and SERR timers, if available.
- */
- pcibios_enable_timers(hose);
-
- /*
- * Scan the bus if it is register after the PCI subsystem
- * initialization.
- */
- if (pci_initialized) {
- mutex_lock(&pci_scan_mutex);
- pcibios_scanbus(hose);
- mutex_unlock(&pci_scan_mutex);
- }
-
- return 0;
-
-out:
- for (--i; i >= 0; i--)
- release_resource(&hose->resources[i]);
-
- printk(KERN_WARNING "Skipping PCI bus scan due to resource conflict\n");
- return -1;
-}
-
-static int __init pcibios_init(void)
-{
- struct pci_channel *hose;
-
- /* Scan all of the recorded PCI controllers. */
- for (hose = hose_head; hose; hose = hose->next)
- pcibios_scanbus(hose);
-
- pci_fixup_irqs(pci_common_swizzle, pcibios_map_platform_irq);
-
- dma_debug_add_bus(&pci_bus_type);
-
- pci_initialized = 1;
-
- return 0;
-}
-subsys_initcall(pcibios_init);
-
-/*
- * Called after each bus is probed, but before its children
- * are examined.
- */
-void pcibios_fixup_bus(struct pci_bus *bus)
-{
-}
-
-/*
- * We need to avoid collisions with `mirrored' VGA ports
- * and other strange ISA hardware, so we always want the
- * addresses to be allocated in the 0x000-0x0ff region
- * modulo 0x400.
- */
-resource_size_t pcibios_align_resource(void *data, const struct resource *res,
- resource_size_t size, resource_size_t align)
-{
- struct pci_dev *dev = data;
- struct pci_channel *hose = dev->sysdata;
- resource_size_t start = res->start;
-
- if (res->flags & IORESOURCE_IO) {
- if (start < PCIBIOS_MIN_IO + hose->resources[0].start)
- start = PCIBIOS_MIN_IO + hose->resources[0].start;
-
- /*
- * Put everything into 0x00-0xff region modulo 0x400.
- */
- if (start & 0x300)
- start = (start + 0x3ff) & ~0x3ff;
- }
-
- return start;
-}
-
-static void __init
-pcibios_bus_report_status_early(struct pci_channel *hose,
- int top_bus, int current_bus,
- unsigned int status_mask, int warn)
-{
- unsigned int pci_devfn;
- u16 status;
- int ret;
-
- for (pci_devfn = 0; pci_devfn < 0xff; pci_devfn++) {
- if (PCI_FUNC(pci_devfn))
- continue;
- ret = early_read_config_word(hose, top_bus, current_bus,
- pci_devfn, PCI_STATUS, &status);
- if (ret != PCIBIOS_SUCCESSFUL)
- continue;
- if (status == 0xffff)
- continue;
-
- early_write_config_word(hose, top_bus, current_bus,
- pci_devfn, PCI_STATUS,
- status & status_mask);
- if (warn)
- printk("(%02x:%02x: %04X) ", current_bus,
- pci_devfn, status);
- }
-}
-
-/*
- * We can't use pci_find_device() here since we are
- * called from interrupt context.
- */
-static void __init_refok
-pcibios_bus_report_status(struct pci_bus *bus, unsigned int status_mask,
- int warn)
-{
- struct pci_dev *dev;
-
- list_for_each_entry(dev, &bus->devices, bus_list) {
- u16 status;
-
- /*
- * ignore host bridge - we handle
- * that separately
- */
- if (dev->bus->number == 0 && dev->devfn == 0)
- continue;
-
- pci_read_config_word(dev, PCI_STATUS, &status);
- if (status == 0xffff)
- continue;
-
- if ((status & status_mask) == 0)
- continue;
-
- /* clear the status errors */
- pci_write_config_word(dev, PCI_STATUS, status & status_mask);
-
- if (warn)
- printk("(%s: %04X) ", pci_name(dev), status);
- }
-
- list_for_each_entry(dev, &bus->devices, bus_list)
- if (dev->subordinate)
- pcibios_bus_report_status(dev->subordinate, status_mask, warn);
-}
-
-void __init_refok pcibios_report_status(unsigned int status_mask, int warn)
-{
- struct pci_channel *hose;
-
- for (hose = hose_head; hose; hose = hose->next) {
- if (unlikely(!hose->bus))
- pcibios_bus_report_status_early(hose, hose_head->index,
- hose->index, status_mask, warn);
- else
- pcibios_bus_report_status(hose->bus, status_mask, warn);
- }
-}
-
-int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
- enum pci_mmap_state mmap_state, int write_combine)
-{
- /*
- * I/O space can be accessed via normal processor loads and stores on
- * this platform but for now we elect not to do this and portable
- * drivers should not do this anyway.
- */
- if (mmap_state == pci_mmap_io)
- return -EINVAL;
-
- /*
- * Ignore write-combine; for now only return uncached mappings.
- */
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
-
- return remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
- vma->vm_end - vma->vm_start,
- vma->vm_page_prot);
-}
-
-#ifndef CONFIG_GENERIC_IOMAP
-
-void __iomem *__pci_ioport_map(struct pci_dev *dev,
- unsigned long port, unsigned int nr)
-{
- struct pci_channel *chan = dev->sysdata;
-
- if (unlikely(!chan->io_map_base)) {
- chan->io_map_base = sh_io_port_base;
-
- if (pci_domains_supported)
- panic("To avoid data corruption io_map_base MUST be "
- "set with multiple PCI domains.");
- }
-
- return (void __iomem *)(chan->io_map_base + port);
-}
-
-void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
-{
- iounmap(addr);
-}
-EXPORT_SYMBOL(pci_iounmap);
-
-#endif /* CONFIG_GENERIC_IOMAP */
-
-EXPORT_SYMBOL(PCIBIOS_MIN_IO);
-EXPORT_SYMBOL(PCIBIOS_MIN_MEM);
diff --git a/arch/sh/kernel/Makefile b/arch/sh/kernel/Makefile
index 09040fd..a9a54c2 100644
--- a/arch/sh/kernel/Makefile
+++ b/arch/sh/kernel/Makefile
@@ -46,5 +46,7 @@ obj-$(CONFIG_DWARF_UNWINDER) += dwarf.o
obj-$(CONFIG_PERF_EVENTS) += perf_event.o perf_callchain.o
obj-$(CONFIG_HAVE_HW_BREAKPOINT) += hw_breakpoint.o
+obj-$(CONFIG_PCI) += pci.o pci-common.o
ccflags-y := -Werror
+CFLAGS_pci.o := -O0
diff --git a/arch/sh/kernel/pci-common.c b/arch/sh/kernel/pci-common.c
new file mode 100644
index 0000000..dbf1381
--- /dev/null
+++ b/arch/sh/kernel/pci-common.c
@@ -0,0 +1,162 @@
+#include <linux/pci.h>
+#include <linux/interrupt.h>
+#include <linux/timer.h>
+#include <linux/kernel.h>
+
+/*
+ * These functions are used early on before PCI scanning is done
+ * and all of the pci_dev and pci_bus structures have been created.
+ */
+static struct pci_dev *fake_pci_dev(struct pci_channel *hose,
+ int top_bus, int busnr, int devfn)
+{
+ static struct pci_dev dev;
+ static struct pci_bus bus;
+
+ dev.bus = &bus;
+ dev.sysdata = hose;
+ dev.devfn = devfn;
+ bus.number = busnr;
+ bus.sysdata = hose;
+ bus.ops = hose->pci_ops;
+
+ if(busnr != top_bus)
+ /* Fake a parent bus structure. */
+ bus.parent = &bus;
+ else
+ bus.parent = NULL;
+
+ return &dev;
+}
+
+#define EARLY_PCI_OP(rw, size, type) \
+int __init early_##rw##_config_##size(struct pci_channel *hose, \
+ int top_bus, int bus, int devfn, int offset, type value) \
+{ \
+ return pci_##rw##_config_##size( \
+ fake_pci_dev(hose, top_bus, bus, devfn), \
+ offset, value); \
+}
+
+EARLY_PCI_OP(read, byte, u8 *)
+EARLY_PCI_OP(read, word, u16 *)
+EARLY_PCI_OP(read, dword, u32 *)
+EARLY_PCI_OP(write, byte, u8)
+EARLY_PCI_OP(write, word, u16)
+EARLY_PCI_OP(write, dword, u32)
+
+int __init pci_is_66mhz_capable(struct pci_channel *hose,
+ int top_bus, int current_bus)
+{
+ u32 pci_devfn;
+ unsigned short vid;
+ int cap66 = -1;
+ u16 stat;
+
+ printk(KERN_INFO "PCI: Checking 66MHz capabilities...\n");
+
+ for (pci_devfn = 0; pci_devfn < 0xff; pci_devfn++) {
+ if (PCI_FUNC(pci_devfn))
+ continue;
+ if (early_read_config_word(hose, top_bus, current_bus,
+ pci_devfn, PCI_VENDOR_ID, &vid) !=
+ PCIBIOS_SUCCESSFUL)
+ continue;
+ if (vid == 0xffff)
+ continue;
+
+ /* check 66MHz capability */
+ if (cap66 < 0)
+ cap66 = 1;
+ if (cap66) {
+ early_read_config_word(hose, top_bus, current_bus,
+ pci_devfn, PCI_STATUS, &stat);
+ if (!(stat & PCI_STATUS_66MHZ)) {
+ printk(KERN_DEBUG
+ "PCI: %02x:%02x not 66MHz capable.\n",
+ current_bus, pci_devfn);
+ cap66 = 0;
+ break;
+ }
+ }
+ }
+
+ return cap66 > 0;
+}
+
+static void pcibios_enable_err(unsigned long __data)
+{
+ struct pci_channel *hose = (struct pci_channel *)__data;
+
+ del_timer(&hose->err_timer);
+ printk(KERN_DEBUG "PCI: re-enabling error IRQ.\n");
+ enable_irq(hose->err_irq);
+}
+
+static void pcibios_enable_serr(unsigned long __data)
+{
+ struct pci_channel *hose = (struct pci_channel *)__data;
+
+ del_timer(&hose->serr_timer);
+ printk(KERN_DEBUG "PCI: re-enabling system error IRQ.\n");
+ enable_irq(hose->serr_irq);
+}
+
+void pcibios_enable_timers(struct pci_channel *hose)
+{
+ if (hose->err_irq) {
+ init_timer(&hose->err_timer);
+ hose->err_timer.data = (unsigned long)hose;
+ hose->err_timer.function = pcibios_enable_err;
+ }
+
+ if (hose->serr_irq) {
+ init_timer(&hose->serr_timer);
+ hose->serr_timer.data = (unsigned long)hose;
+ hose->serr_timer.function = pcibios_enable_serr;
+ }
+}
+
+/*
+ * A simple handler for the regular PCI status errors, called from IRQ
+ * context.
+ */
+unsigned int pcibios_handle_status_errors(unsigned long addr,
+ unsigned int status,
+ struct pci_channel *hose)
+{
+ unsigned int cmd = 0;
+
+ if (status & PCI_STATUS_REC_MASTER_ABORT) {
+ printk(KERN_DEBUG "PCI: master abort, pc=0x%08lx\n", addr);
+ cmd |= PCI_STATUS_REC_MASTER_ABORT;
+ }
+
+ if (status & PCI_STATUS_REC_TARGET_ABORT) {
+ printk(KERN_DEBUG "PCI: target abort: ");
+ pcibios_report_status(PCI_STATUS_REC_TARGET_ABORT |
+ PCI_STATUS_SIG_TARGET_ABORT |
+ PCI_STATUS_REC_MASTER_ABORT, 1);
+ printk("\n");
+
+ cmd |= PCI_STATUS_REC_TARGET_ABORT;
+ }
+
+ if (status & (PCI_STATUS_PARITY | PCI_STATUS_DETECTED_PARITY)) {
+ printk(KERN_DEBUG "PCI: parity error detected: ");
+ pcibios_report_status(PCI_STATUS_PARITY |
+ PCI_STATUS_DETECTED_PARITY, 1);
+ printk("\n");
+
+ cmd |= PCI_STATUS_PARITY | PCI_STATUS_DETECTED_PARITY;
+
+ /* Now back off of the IRQ for awhile */
+ if (hose->err_irq) {
+ disable_irq_nosync(hose->err_irq);
+ hose->err_timer.expires = jiffies + HZ;
+ add_timer(&hose->err_timer);
+ }
+ }
+
+ return cmd;
+}
diff --git a/arch/sh/kernel/pci.c b/arch/sh/kernel/pci.c
new file mode 100644
index 0000000..9cf0ba4
--- /dev/null
+++ b/arch/sh/kernel/pci.c
@@ -0,0 +1,342 @@
+/*
+ * New-style PCI core.
+ *
+ * Copyright (c) 2004 - 2009 Paul Mundt
+ * Copyright (c) 2002 M. R. Brown
+ *
+ * Modelled after arch/mips/pci/pci.c:
+ * Copyright (C) 2003, 04 Ralf Baechle (ralf@xxxxxxxxxxxxxx)
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/dma-debug.h>
+#include <linux/io.h>
+#include <linux/mutex.h>
+#include <linux/spinlock.h>
+#include <linux/export.h>
+
+unsigned long PCIBIOS_MIN_IO = 0x0000;
+unsigned long PCIBIOS_MIN_MEM = 0;
+
+/*
+ * The PCI controller list.
+ */
+static struct pci_channel *hose_head, **hose_tail = &hose_head;
+
+static int pci_initialized;
+
+static void pcibios_scanbus(struct pci_channel *hose)
+{
+ static int next_busno;
+ static int need_domain_info;
+ LIST_HEAD(resources);
+ struct resource *res;
+ resource_size_t offset;
+ int i;
+ struct pci_bus *bus;
+
+ for (i = 0; i < hose->nr_resources; i++) {
+ res = hose->resources + i;
+ offset = 0;
+ if (res->flags & IORESOURCE_IO)
+ offset = hose->io_offset;
+ else if (res->flags & IORESOURCE_MEM)
+ offset = hose->mem_offset;
+ pci_add_resource_offset(&resources, res, offset);
+ }
+
+ bus = pci_scan_root_bus(NULL, next_busno, hose->pci_ops, hose,
+ &resources);
+ hose->bus = bus;
+
+ need_domain_info = need_domain_info || hose->index;
+ hose->need_domain_info = need_domain_info;
+
+ if (!bus) {
+ pci_free_resource_list(&resources);
+ return;
+ }
+
+ next_busno = bus->busn_res.end + 1;
+ /* Don't allow 8-bit bus number overflow inside the hose -
+ reserve some space for bridges. */
+ if (next_busno > 224) {
+ next_busno = 0;
+ need_domain_info = 1;
+ }
+
+ pci_bus_size_bridges(bus);
+ pci_bus_assign_resources(bus);
+ pci_bus_add_devices(bus);
+}
+
+/*
+ * This interrupt-safe spinlock protects all accesses to PCI
+ * configuration space.
+ */
+DEFINE_RAW_SPINLOCK(pci_config_lock);
+static DEFINE_MUTEX(pci_scan_mutex);
+
+int register_pci_controller(struct pci_channel *hose)
+{
+ int i;
+
+ for (i = 0; i < hose->nr_resources; i++) {
+ struct resource *res = hose->resources + i;
+
+ if (res->flags & IORESOURCE_IO) {
+ if (request_resource(&ioport_resource, res) < 0)
+ goto out;
+ } else {
+ if (request_resource(&iomem_resource, res) < 0)
+ goto out;
+ }
+ }
+
+ *hose_tail = hose;
+ hose_tail = &hose->next;
+
+ /*
+ * Do not panic here but later - this might happen before console init.
+ */
+ if (!hose->io_map_base) {
+ printk(KERN_WARNING
+ "registering PCI controller with io_map_base unset\n");
+ }
+
+ /*
+ * Setup the ERR/PERR and SERR timers, if available.
+ */
+ pcibios_enable_timers(hose);
+
+ /*
+ * Scan the bus if it is register after the PCI subsystem
+ * initialization.
+ */
+ if (pci_initialized) {
+ mutex_lock(&pci_scan_mutex);
+ pcibios_scanbus(hose);
+ mutex_unlock(&pci_scan_mutex);
+ }
+
+ return 0;
+
+out:
+ for (--i; i >= 0; i--)
+ release_resource(&hose->resources[i]);
+
+ printk(KERN_WARNING "Skipping PCI bus scan due to resource conflict\n");
+ return -1;
+}
+
+#ifndef CONFIG_SH_DEVICE_TREE
+static int __init pcibios_init(void)
+{
+ struct pci_channel *hose;
+
+ /* Scan all of the recorded PCI controllers. */
+ for (hose = hose_head; hose; hose = hose->next)
+ pcibios_scanbus(hose);
+
+ pci_fixup_irqs(pci_common_swizzle, pcibios_map_platform_irq);
+
+ dma_debug_add_bus(&pci_bus_type);
+
+ pci_initialized = 1;
+
+ return 0;
+}
+subsys_initcall(pcibios_init);
+#endif
+
+/*
+ * Called after each bus is probed, but before its children
+ * are examined.
+ */
+void pcibios_fixup_bus(struct pci_bus *bus)
+{
+}
+
+#ifndef CONFIG_SH_DEVICE_TREE
+/*
+ * We need to avoid collisions with `mirrored' VGA ports
+ * and other strange ISA hardware, so we always want the
+ * addresses to be allocated in the 0x000-0x0ff region
+ * modulo 0x400.
+ */
+resource_size_t pcibios_align_resource(void *data, const struct resource *res,
+ resource_size_t size, resource_size_t align)
+{
+ struct pci_dev *dev = data;
+ struct pci_channel *hose = dev->sysdata;
+ resource_size_t start = res->start;
+
+ if (res->flags & IORESOURCE_IO) {
+ if (start < PCIBIOS_MIN_IO + hose->resources[0].start)
+ start = PCIBIOS_MIN_IO + hose->resources[0].start;
+
+ /*
+ * Put everything into 0x00-0xff region modulo 0x400.
+ */
+ if (start & 0x300)
+ start = (start + 0x3ff) & ~0x3ff;
+ }
+
+ return start;
+}
+#else
+typedef resource_size_t (*align_resource_fn)(struct pci_dev *dev,
+ const struct resource *res,
+ resource_size_t start,
+ resource_size_t size,
+ resource_size_t align);
+
+resource_size_t pcibios_align_resource(void *data, const struct resource *res,
+ resource_size_t size, resource_size_t align)
+{
+ resource_size_t start = res->start;
+ struct pci_dev *dev = data;
+ struct pci_config_window *cfg = dev->sysdata;
+ align_resource_fn fn;
+
+ fn = (align_resource_fn)(cfg->priv);
+ return fn(dev, res, start, size, align);
+}
+#endif
+
+static void __init
+pcibios_bus_report_status_early(struct pci_channel *hose,
+ int top_bus, int current_bus,
+ unsigned int status_mask, int warn)
+{
+ unsigned int pci_devfn;
+ u16 status;
+ int ret;
+
+ for (pci_devfn = 0; pci_devfn < 0xff; pci_devfn++) {
+ if (PCI_FUNC(pci_devfn))
+ continue;
+ ret = early_read_config_word(hose, top_bus, current_bus,
+ pci_devfn, PCI_STATUS, &status);
+ if (ret != PCIBIOS_SUCCESSFUL)
+ continue;
+ if (status == 0xffff)
+ continue;
+
+ early_write_config_word(hose, top_bus, current_bus,
+ pci_devfn, PCI_STATUS,
+ status & status_mask);
+ if (warn)
+ printk("(%02x:%02x: %04X) ", current_bus,
+ pci_devfn, status);
+ }
+}
+
+/*
+ * We can't use pci_find_device() here since we are
+ * called from interrupt context.
+ */
+static void __init_refok
+pcibios_bus_report_status(struct pci_bus *bus, unsigned int status_mask,
+ int warn)
+{
+ struct pci_dev *dev;
+
+ list_for_each_entry(dev, &bus->devices, bus_list) {
+ u16 status;
+
+ /*
+ * ignore host bridge - we handle
+ * that separately
+ */
+ if (dev->bus->number == 0 && dev->devfn == 0)
+ continue;
+
+ pci_read_config_word(dev, PCI_STATUS, &status);
+ if (status == 0xffff)
+ continue;
+
+ if ((status & status_mask) == 0)
+ continue;
+
+ /* clear the status errors */
+ pci_write_config_word(dev, PCI_STATUS, status & status_mask);
+
+ if (warn)
+ printk("(%s: %04X) ", pci_name(dev), status);
+ }
+
+ list_for_each_entry(dev, &bus->devices, bus_list)
+ if (dev->subordinate)
+ pcibios_bus_report_status(dev->subordinate, status_mask, warn);
+}
+
+void __init_refok pcibios_report_status(unsigned int status_mask, int warn)
+{
+ struct pci_channel *hose;
+
+ for (hose = hose_head; hose; hose = hose->next) {
+ if (unlikely(!hose->bus))
+ pcibios_bus_report_status_early(hose, hose_head->index,
+ hose->index, status_mask, warn);
+ else
+ pcibios_bus_report_status(hose->bus, status_mask, warn);
+ }
+}
+
+int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
+ enum pci_mmap_state mmap_state, int write_combine)
+{
+ /*
+ * I/O space can be accessed via normal processor loads and stores on
+ * this platform but for now we elect not to do this and portable
+ * drivers should not do this anyway.
+ */
+ if (mmap_state == pci_mmap_io)
+ return -EINVAL;
+
+ /*
+ * Ignore write-combine; for now only return uncached mappings.
+ */
+ vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
+
+ return remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
+ vma->vm_end - vma->vm_start,
+ vma->vm_page_prot);
+}
+
+#ifndef CONFIG_GENERIC_IOMAP
+
+void __iomem *__pci_ioport_map(struct pci_dev *dev,
+ unsigned long port, unsigned int nr)
+{
+ struct pci_channel *chan = dev->sysdata;
+
+ if (unlikely(!chan->io_map_base)) {
+ chan->io_map_base = sh_io_port_base;
+
+ if (pci_domains_supported)
+ panic("To avoid data corruption io_map_base MUST be "
+ "set with multiple PCI domains.");
+ }
+
+ return (void __iomem *)(chan->io_map_base + port);
+}
+
+void pci_iounmap(struct pci_dev *dev, void __iomem *addr)
+{
+ iounmap(addr);
+}
+EXPORT_SYMBOL(pci_iounmap);
+
+#endif /* CONFIG_GENERIC_IOMAP */
+
+EXPORT_SYMBOL(PCIBIOS_MIN_IO);
+EXPORT_SYMBOL(PCIBIOS_MIN_MEM);
--
2.7.0