sparc32,leon: added LEON-common low-level PCI routines
The LEON architecture does not have a BIOS or bootloader that initializes PCI for us, instead Linux generic PCI layer is used to set up resources and IRQ. Signed-off-by: Daniel Hellstrom <daniel@gaisler.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
parent
cfe3af5dde
commit
26893c1368
|
@ -533,6 +533,11 @@ config PCIC_PCI
|
|||
depends on PCI && !SPARC_LEON
|
||||
default y
|
||||
|
||||
config LEON_PCI
|
||||
bool
|
||||
depends on PCI && SPARC_LEON
|
||||
default y
|
||||
|
||||
source "drivers/pci/Kconfig"
|
||||
|
||||
source "drivers/pcmcia/Kconfig"
|
||||
|
|
21
arch/sparc/include/asm/leon_pci.h
Normal file
21
arch/sparc/include/asm/leon_pci.h
Normal file
|
@ -0,0 +1,21 @@
|
|||
/*
|
||||
* asm/leon_pci.h
|
||||
*
|
||||
* Copyright (C) 2011 Aeroflex Gaisler AB, Daniel Hellstrom
|
||||
*/
|
||||
|
||||
#ifndef _ASM_LEON_PCI_H_
|
||||
#define _ASM_LEON_PCI_H_
|
||||
|
||||
/* PCI related definitions */
|
||||
struct leon_pci_info {
|
||||
struct pci_ops *ops;
|
||||
struct resource io_space;
|
||||
struct resource mem_space;
|
||||
int (*map_irq)(struct pci_dev *dev, u8 slot, u8 pin);
|
||||
};
|
||||
|
||||
extern void leon_pci_init(struct platform_device *ofdev,
|
||||
struct leon_pci_info *info);
|
||||
|
||||
#endif /* _ASM_LEON_PCI_H_ */
|
|
@ -47,7 +47,31 @@ extern struct device_node *pci_device_to_OF_node(struct pci_dev *pdev);
|
|||
|
||||
#endif /* __KERNEL__ */
|
||||
|
||||
#ifndef CONFIG_LEON_PCI
|
||||
/* generic pci stuff */
|
||||
#include <asm-generic/pci.h>
|
||||
#else
|
||||
/*
|
||||
* On LEON PCI Memory space is mapped 1:1 with physical address space.
|
||||
*
|
||||
* I/O space is located at low 64Kbytes in PCI I/O space. The I/O addresses
|
||||
* are converted into CPU addresses to virtual addresses that are mapped with
|
||||
* MMU to the PCI Host PCI I/O space window which are translated to the low
|
||||
* 64Kbytes by the Host controller.
|
||||
*/
|
||||
|
||||
extern void
|
||||
pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
|
||||
struct resource *res);
|
||||
|
||||
extern void
|
||||
pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
|
||||
struct pci_bus_region *region);
|
||||
|
||||
static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
|
||||
{
|
||||
return PCI_IRQ_NONE;
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* __SPARC_PCI_H */
|
||||
|
|
|
@ -74,6 +74,7 @@ obj-$(CONFIG_SPARC64_SMP) += cpumap.o
|
|||
obj-y += dma.o
|
||||
|
||||
obj-$(CONFIG_PCIC_PCI) += pcic.o
|
||||
obj-$(CONFIG_LEON_PCI) += leon_pci.o
|
||||
|
||||
obj-$(CONFIG_SMP) += trampoline_$(BITS).o smp_$(BITS).o
|
||||
obj-$(CONFIG_SPARC32_SMP) += sun4m_smp.o sun4d_smp.o leon_smp.o
|
||||
|
|
253
arch/sparc/kernel/leon_pci.c
Normal file
253
arch/sparc/kernel/leon_pci.c
Normal file
|
@ -0,0 +1,253 @@
|
|||
/*
|
||||
* leon_pci.c: LEON Host PCI support
|
||||
*
|
||||
* Copyright (C) 2011 Aeroflex Gaisler AB, Daniel Hellstrom
|
||||
*
|
||||
* Code is partially derived from pcic.c
|
||||
*/
|
||||
|
||||
#include <linux/of_device.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/pci.h>
|
||||
#include <asm/leon.h>
|
||||
#include <asm/leon_pci.h>
|
||||
|
||||
/* The LEON architecture does not rely on a BIOS or bootloader to setup
|
||||
* PCI for us. The Linux generic routines are used to setup resources,
|
||||
* reset values of confuration-space registers settings ae preseved.
|
||||
*/
|
||||
void leon_pci_init(struct platform_device *ofdev, struct leon_pci_info *info)
|
||||
{
|
||||
struct pci_bus *root_bus;
|
||||
|
||||
root_bus = pci_scan_bus_parented(&ofdev->dev, 0, info->ops, info);
|
||||
if (root_bus) {
|
||||
root_bus->resource[0] = &info->io_space;
|
||||
root_bus->resource[1] = &info->mem_space;
|
||||
root_bus->resource[2] = NULL;
|
||||
|
||||
/* Init all PCI devices into PCI tree */
|
||||
pci_bus_add_devices(root_bus);
|
||||
|
||||
/* Setup IRQs of all devices using custom routines */
|
||||
pci_fixup_irqs(pci_common_swizzle, info->map_irq);
|
||||
|
||||
/* Assign devices with resources */
|
||||
pci_assign_unassigned_resources();
|
||||
}
|
||||
}
|
||||
|
||||
/* PCI Memory and Prefetchable Memory is direct-mapped. However I/O Space is
|
||||
* accessed through a Window which is translated to low 64KB in PCI space, the
|
||||
* first 4KB is not used so 60KB is available.
|
||||
*
|
||||
* This function is used by generic code to translate resource addresses into
|
||||
* PCI addresses.
|
||||
*/
|
||||
void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
|
||||
struct resource *res)
|
||||
{
|
||||
struct leon_pci_info *info = dev->bus->sysdata;
|
||||
|
||||
region->start = res->start;
|
||||
region->end = res->end;
|
||||
|
||||
if (res->flags & IORESOURCE_IO) {
|
||||
region->start -= (info->io_space.start - 0x1000);
|
||||
region->end -= (info->io_space.start - 0x1000);
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL(pcibios_resource_to_bus);
|
||||
|
||||
/* see pcibios_resource_to_bus() comment */
|
||||
void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
|
||||
struct pci_bus_region *region)
|
||||
{
|
||||
struct leon_pci_info *info = dev->bus->sysdata;
|
||||
|
||||
res->start = region->start;
|
||||
res->end = region->end;
|
||||
|
||||
if (res->flags & IORESOURCE_IO) {
|
||||
res->start += (info->io_space.start - 0x1000);
|
||||
res->end += (info->io_space.start - 0x1000);
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL(pcibios_bus_to_resource);
|
||||
|
||||
void __devinit pcibios_fixup_bus(struct pci_bus *pbus)
|
||||
{
|
||||
struct leon_pci_info *info = pbus->sysdata;
|
||||
struct pci_dev *dev;
|
||||
int i, has_io, has_mem;
|
||||
u16 cmd;
|
||||
|
||||
/* Generic PCI bus probing sets these to point at
|
||||
* &io{port,mem}_resouce which is wrong for us.
|
||||
*/
|
||||
if (pbus->self == NULL) {
|
||||
pbus->resource[0] = &info->io_space;
|
||||
pbus->resource[1] = &info->mem_space;
|
||||
pbus->resource[2] = NULL;
|
||||
}
|
||||
|
||||
list_for_each_entry(dev, &pbus->devices, bus_list) {
|
||||
/*
|
||||
* We can not rely on that the bootloader has enabled I/O
|
||||
* or memory access to PCI devices. Instead we enable it here
|
||||
* if the device has BARs of respective type.
|
||||
*/
|
||||
has_io = has_mem = 0;
|
||||
for (i = 0; i < PCI_ROM_RESOURCE; i++) {
|
||||
unsigned long f = dev->resource[i].flags;
|
||||
if (f & IORESOURCE_IO)
|
||||
has_io = 1;
|
||||
else if (f & IORESOURCE_MEM)
|
||||
has_mem = 1;
|
||||
}
|
||||
/* ROM BARs are mapped into 32-bit memory space */
|
||||
if (dev->resource[PCI_ROM_RESOURCE].end != 0) {
|
||||
dev->resource[PCI_ROM_RESOURCE].flags |=
|
||||
IORESOURCE_ROM_ENABLE;
|
||||
has_mem = 1;
|
||||
}
|
||||
pci_bus_read_config_word(pbus, dev->devfn, PCI_COMMAND, &cmd);
|
||||
if (has_io && !(cmd & PCI_COMMAND_IO)) {
|
||||
#ifdef CONFIG_PCI_DEBUG
|
||||
printk(KERN_INFO "LEONPCI: Enabling I/O for dev %s\n",
|
||||
pci_name(dev));
|
||||
#endif
|
||||
cmd |= PCI_COMMAND_IO;
|
||||
pci_bus_write_config_word(pbus, dev->devfn, PCI_COMMAND,
|
||||
cmd);
|
||||
}
|
||||
if (has_mem && !(cmd & PCI_COMMAND_MEMORY)) {
|
||||
#ifdef CONFIG_PCI_DEBUG
|
||||
printk(KERN_INFO "LEONPCI: Enabling MEMORY for dev"
|
||||
"%s\n", pci_name(dev));
|
||||
#endif
|
||||
cmd |= PCI_COMMAND_MEMORY;
|
||||
pci_bus_write_config_word(pbus, dev->devfn, PCI_COMMAND,
|
||||
cmd);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Other archs parse arguments here.
|
||||
*/
|
||||
char * __devinit pcibios_setup(char *str)
|
||||
{
|
||||
return str;
|
||||
}
|
||||
|
||||
resource_size_t pcibios_align_resource(void *data, const struct resource *res,
|
||||
resource_size_t size, resource_size_t align)
|
||||
{
|
||||
return res->start;
|
||||
}
|
||||
|
||||
int pcibios_enable_device(struct pci_dev *dev, int mask)
|
||||
{
|
||||
return pci_enable_resources(dev, mask);
|
||||
}
|
||||
|
||||
struct device_node *pci_device_to_OF_node(struct pci_dev *pdev)
|
||||
{
|
||||
/*
|
||||
* Currently the OpenBoot nodes are not connected with the PCI device,
|
||||
* this is because the LEON PROM does not create PCI nodes. Eventually
|
||||
* this will change and the same approach as pcic.c can be used to
|
||||
* match PROM nodes with pci devices.
|
||||
*/
|
||||
return NULL;
|
||||
}
|
||||
EXPORT_SYMBOL(pci_device_to_OF_node);
|
||||
|
||||
void __devinit pcibios_update_irq(struct pci_dev *dev, int irq)
|
||||
{
|
||||
#ifdef CONFIG_PCI_DEBUG
|
||||
printk(KERN_DEBUG "LEONPCI: Assigning IRQ %02d to %s\n", irq,
|
||||
pci_name(dev));
|
||||
#endif
|
||||
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
|
||||
}
|
||||
|
||||
/* in/out routines taken from pcic.c
|
||||
*
|
||||
* This probably belongs here rather than ioport.c because
|
||||
* we do not want this crud linked into SBus kernels.
|
||||
* Also, think for a moment about likes of floppy.c that
|
||||
* include architecture specific parts. They may want to redefine ins/outs.
|
||||
*
|
||||
* We do not use horrible macros here because we want to
|
||||
* advance pointer by sizeof(size).
|
||||
*/
|
||||
void outsb(unsigned long addr, const void *src, unsigned long count)
|
||||
{
|
||||
while (count) {
|
||||
count -= 1;
|
||||
outb(*(const char *)src, addr);
|
||||
src += 1;
|
||||
/* addr += 1; */
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL(outsb);
|
||||
|
||||
void outsw(unsigned long addr, const void *src, unsigned long count)
|
||||
{
|
||||
while (count) {
|
||||
count -= 2;
|
||||
outw(*(const short *)src, addr);
|
||||
src += 2;
|
||||
/* addr += 2; */
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL(outsw);
|
||||
|
||||
void outsl(unsigned long addr, const void *src, unsigned long count)
|
||||
{
|
||||
while (count) {
|
||||
count -= 4;
|
||||
outl(*(const long *)src, addr);
|
||||
src += 4;
|
||||
/* addr += 4; */
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL(outsl);
|
||||
|
||||
void insb(unsigned long addr, void *dst, unsigned long count)
|
||||
{
|
||||
while (count) {
|
||||
count -= 1;
|
||||
*(unsigned char *)dst = inb(addr);
|
||||
dst += 1;
|
||||
/* addr += 1; */
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL(insb);
|
||||
|
||||
void insw(unsigned long addr, void *dst, unsigned long count)
|
||||
{
|
||||
while (count) {
|
||||
count -= 2;
|
||||
*(unsigned short *)dst = inw(addr);
|
||||
dst += 2;
|
||||
/* addr += 2; */
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL(insw);
|
||||
|
||||
void insl(unsigned long addr, void *dst, unsigned long count)
|
||||
{
|
||||
while (count) {
|
||||
count -= 4;
|
||||
/*
|
||||
* XXX I am sure we are in for an unaligned trap here.
|
||||
*/
|
||||
*(unsigned long *)dst = inl(addr);
|
||||
dst += 4;
|
||||
/* addr += 4; */
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL(insl);
|
|
@ -51,6 +51,7 @@ obj-$(CONFIG_X86_VISWS) += setup-irq.o
|
|||
obj-$(CONFIG_MN10300) += setup-bus.o
|
||||
obj-$(CONFIG_MICROBLAZE) += setup-bus.o
|
||||
obj-$(CONFIG_TILE) += setup-bus.o setup-irq.o
|
||||
obj-$(CONFIG_SPARC_LEON) += setup-bus.o setup-irq.o
|
||||
|
||||
#
|
||||
# ACPI Related PCI FW Functions
|
||||
|
|
Loading…
Reference in a new issue