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/*
* arch/mips/ddb5074/pci.c -- NEC DDB Vrc-5074 PCI access routines
*
* Copyright (C) 2000 Geert Uytterhoeven <geert@sonycom.com>
* Albert Dorofeev <albert@sonycom.com>
* Sony Software Development Center Europe (SDCE), Brussels
*/
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/ioport.h>
#include <asm/nile4.h>
static u32 nile4_pre_pci_access0(int slot_num)
{
u32 pci_addr = 0;
u32 virt_addr = NILE4_PCI_CFG_BASE;
/* Set window 1 address 8000000 - 64 bit - 2 MB (PCI config space) */
nile4_set_pdar(NILE4_PCIW1, PHYSADDR(virt_addr), 0x00200000, 64, 0,
0);
if (slot_num > 2)
pci_addr = 0x00040000 << slot_num;
else
virt_addr += 0x00040000 << slot_num;
nile4_set_pmr(NILE4_PCIINIT1, NILE4_PCICMD_CFG, pci_addr);
return virt_addr;
}
static void nile4_post_pci_access0(void)
{
/*
* Set window 1 back to address 8000000 - 64 bit - 128 MB
* (PCI IO space)
*/
nile4_set_pdar(NILE4_PCIW1, PHYSADDR(NILE4_PCI_MEM_BASE),
0x08000000, 64, 1, 1);
nile4_set_pmr(NILE4_PCIINIT1, NILE4_PCICMD_MEM, 0);
}
static int nile4_pci_read_config_dword(struct pci_dev *dev,
int where, u32 * val)
{
int slot_num, func_num;
u32 base;
/*
* For starters let's do configuration cycle 0 only (one bus only)
*/
if (dev->bus->number)
return PCIBIOS_FUNC_NOT_SUPPORTED;
slot_num = PCI_SLOT(dev->devfn);
func_num = PCI_FUNC(dev->devfn);
if (slot_num == 5) {
/*
* This is Nile 4 and it will crash if we access it like other
* devices
*/
*val = nile4_in32(NILE4_PCI_BASE + where);
return PCIBIOS_SUCCESSFUL;
}
base = nile4_pre_pci_access0(slot_num);
*val =
*((volatile u32 *) (base + (func_num << 8) + (where & 0xfc)));
nile4_post_pci_access0();
return PCIBIOS_SUCCESSFUL;
}
static int nile4_pci_write_config_dword(struct pci_dev *dev, int where,
u32 val)
{
int slot_num, func_num;
u32 base;
/*
* For starters let's do configuration cycle 0 only (one bus only)
*/
if (dev->bus->number)
return PCIBIOS_FUNC_NOT_SUPPORTED;
slot_num = PCI_SLOT(dev->devfn);
func_num = PCI_FUNC(dev->devfn);
if (slot_num == 5) {
/*
* This is Nile 4 and it will crash if we access it like other
* devices
*/
nile4_out32(NILE4_PCI_BASE + where, val);
return PCIBIOS_SUCCESSFUL;
}
base = nile4_pre_pci_access0(slot_num);
*((volatile u32 *) (base + (func_num << 8) + (where & 0xfc))) =
val;
nile4_post_pci_access0();
return PCIBIOS_SUCCESSFUL;
}
static int nile4_pci_read_config_word(struct pci_dev *dev, int where,
u16 * val)
{
int status;
u32 result;
status = nile4_pci_read_config_dword(dev, where, &result);
if (status != PCIBIOS_SUCCESSFUL)
return status;
if (where & 2)
result >>= 16;
*val = result & 0xffff;
return PCIBIOS_SUCCESSFUL;
}
static int nile4_pci_read_config_byte(struct pci_dev *dev, int where,
u8 * val)
{
int status;
u32 result;
status = nile4_pci_read_config_dword(dev, where, &result);
if (status != PCIBIOS_SUCCESSFUL)
return status;
if (where & 1)
result >>= 8;
if (where & 2)
result >>= 16;
*val = result & 0xff;
return PCIBIOS_SUCCESSFUL;
}
static int nile4_pci_write_config_word(struct pci_dev *dev, int where,
u16 val)
{
int status, shift = 0;
u32 result;
status = nile4_pci_read_config_dword(dev, where, &result);
if (status != PCIBIOS_SUCCESSFUL)
return status;
if (where & 2)
shift += 16;
result &= ~(0xffff << shift);
result |= val << shift;
return nile4_pci_write_config_dword(dev, where, result);
}
static int nile4_pci_write_config_byte(struct pci_dev *dev, int where,
u8 val)
{
int status, shift = 0;
u32 result;
status = nile4_pci_read_config_dword(dev, where, &result);
if (status != PCIBIOS_SUCCESSFUL)
return status;
if (where & 2)
shift += 16;
if (where & 1)
shift += 8;
result &= ~(0xff << shift);
result |= val << shift;
return nile4_pci_write_config_dword(dev, where, result);
}
struct pci_ops nile4_pci_ops = {
nile4_pci_read_config_byte,
nile4_pci_read_config_word,
nile4_pci_read_config_dword,
nile4_pci_write_config_byte,
nile4_pci_write_config_word,
nile4_pci_write_config_dword
};
struct {
struct resource ram;
struct resource flash;
struct resource isa_io;
struct resource pci_io;
struct resource isa_mem;
struct resource pci_mem;
struct resource nile4;
struct resource boot;
} ddb5074_resources = {
{ "RAM", 0x00000000, 0x03ffffff,
IORESOURCE_MEM | PCI_BASE_ADDRESS_MEM_TYPE_64},
{ "Flash ROM", 0x04000000, 0x043fffff},
{ "Nile4 ISA I/O", 0x06000000, 0x060fffff},
{ "Nile4 PCI I/O", 0x06100000, 0x07ffffff},
{ "Nile4 ISA mem", 0x08000000, 0x08ffffff, IORESOURCE_MEM},
{ "Nile4 PCI mem", 0x09000000, 0x0fffffff, IORESOURCE_MEM},
{ "Nile4 ctrl", 0x1fa00000, 0x1fbfffff,
IORESOURCE_MEM | PCI_BASE_ADDRESS_MEM_TYPE_64},
{ "Boot ROM", 0x1fc00000, 0x1fffffff}
};
static void __init ddb5074_pci_fixup(void)
{
struct pci_dev *dev;
pci_for_each_dev(dev) {
if (dev->vendor == PCI_VENDOR_ID_NEC &&
dev->device == PCI_DEVICE_ID_NEC_NILE4) {
/*
* The first 64-bit PCI base register should point to
* the Nile4 control registers. Unfortunately this
* isn't the case, so we fix it ourselves. This allows
* the serial driver to find the UART.
*/
dev->resource[0] = ddb5074_resources.nile4;
request_resource(&iomem_resource,
&dev->resource[0]);
/*
* The second 64-bit PCI base register points to the
* first memory bank. Unfortunately the address is
* wrong, so we fix it (again).
*/
dev->resource[2] = ddb5074_resources.ram;
request_resource(&iomem_resource,
&dev->resource[2]);
} else if (dev->vendor == PCI_VENDOR_ID_AL
&& dev->device == PCI_DEVICE_ID_AL_M7101) {
/*
* It's nice to have the LEDs on the GPIO pins
* available for debugging
*/
extern struct pci_dev *pci_pmu;
u8 t8;
pci_pmu = dev; /* for LEDs D2 and D3 */
/* Program the lines for LEDs D2 and D3 to output */
nile4_pci_read_config_byte(dev, 0x7d, &t8);
t8 |= 0xc0;
nile4_pci_write_config_byte(dev, 0x7d, t8);
/* Turn LEDs D2 and D3 off */
nile4_pci_read_config_byte(dev, 0x7e, &t8);
t8 |= 0xc0;
nile4_pci_write_config_byte(dev, 0x7e, t8);
}
}
}
static void __init pcibios_fixup_irqs(void)
{
struct pci_dev *dev;
int slot_num;
pci_for_each_dev(dev) {
slot_num = PCI_SLOT(dev->devfn);
switch (slot_num) {
case 0:
dev->irq = nile4_to_irq(NILE4_INT_INTE);
break;
case 1:
dev->irq = nile4_to_irq(NILE4_INT_INTA);
break;
case 2: /* slot 1 */
dev->irq = nile4_to_irq(NILE4_INT_INTA);
break;
case 3: /* slot 2 */
dev->irq = nile4_to_irq(NILE4_INT_INTB);
break;
case 4: /* slot 3 */
dev->irq = nile4_to_irq(NILE4_INT_INTC);
break;
case 5:
/*
* Fixup so the serial driver can use the UART
*/
dev->irq = nile4_to_irq(NILE4_INT_UART);
break;
case 13:
dev->irq = nile4_to_irq(NILE4_INT_INTE);
break;
default:
break;
}
}
}
void __init pcibios_init(void)
{
printk("PCI: Probing PCI hardware\n");
ioport_resource.end = 0x1ffffff; /* 32 MB */
iomem_resource.end = 0x1fffffff; /* 512 MB */
/* `ram' and `nile4' are requested through the Nile4 pci_dev */
request_resource(&iomem_resource, &ddb5074_resources.flash);
request_resource(&iomem_resource, &ddb5074_resources.isa_io);
request_resource(&iomem_resource, &ddb5074_resources.pci_io);
request_resource(&iomem_resource, &ddb5074_resources.isa_mem);
request_resource(&iomem_resource, &ddb5074_resources.pci_mem);
request_resource(&iomem_resource, &ddb5074_resources.boot);
pci_scan_bus(0, &nile4_pci_ops, NULL);
ddb5074_pci_fixup();
pci_assign_unassigned_resources();
pcibios_fixup_irqs();
}
void __init pcibios_fixup_bus(struct pci_bus *bus)
{
bus->resource[1] = &ddb5074_resources.pci_mem;
}
char *pcibios_setup(char *str)
{
return str;
}
void __init pcibios_update_irq(struct pci_dev *dev, int irq)
{
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, irq);
}
void __init pcibios_fixup_pbus_ranges(struct pci_bus *bus,
struct pbus_set_ranges_data *ranges)
{
ranges->io_start -= bus->resource[0]->start;
ranges->io_end -= bus->resource[0]->start;
ranges->mem_start -= bus->resource[1]->start;
ranges->mem_end -= bus->resource[1]->start;
}
int pcibios_enable_resources(struct pci_dev *dev)
{
u16 cmd, old_cmd;
int idx;
struct resource *r;
/*
* Don't touch the Nile 4
*/
if (dev->vendor == PCI_VENDOR_ID_NEC &&
dev->device == PCI_DEVICE_ID_NEC_NILE4) return 0;
pci_read_config_word(dev, PCI_COMMAND, &cmd);
old_cmd = cmd;
for (idx = 0; idx < 6; idx++) {
r = &dev->resource[idx];
if (!r->start && r->end) {
printk(KERN_ERR "PCI: Device %s not available because "
"of resource collisions\n", dev->slot_name);
return -EINVAL;
}
if (r->flags & IORESOURCE_IO)
cmd |= PCI_COMMAND_IO;
if (r->flags & IORESOURCE_MEM)
cmd |= PCI_COMMAND_MEMORY;
}
if (cmd != old_cmd) {
printk("PCI: Enabling device %s (%04x -> %04x)\n",
dev->slot_name, old_cmd, cmd);
pci_write_config_word(dev, PCI_COMMAND, cmd);
}
return 0;
}
int pcibios_enable_device(struct pci_dev *dev)
{
return pcibios_enable_resources(dev);
}
void pcibios_update_resource(struct pci_dev *dev, struct resource *root,
struct resource *res, int resource)
{
u32 new, check;
int reg;
new = res->start | (res->flags & PCI_REGION_FLAG_MASK);
if (resource < 6) {
reg = PCI_BASE_ADDRESS_0 + 4 * resource;
} else if (resource == PCI_ROM_RESOURCE) {
res->flags |= PCI_ROM_ADDRESS_ENABLE;
reg = dev->rom_base_reg;
} else {
/*
* Somebody might have asked allocation of a non-standard
* resource
*/
return;
}
pci_write_config_dword(dev, reg, new);
pci_read_config_dword(dev, reg, &check);
if ((new ^ check) &
((new & PCI_BASE_ADDRESS_SPACE_IO) ? PCI_BASE_ADDRESS_IO_MASK :
PCI_BASE_ADDRESS_MEM_MASK)) {
printk(KERN_ERR "PCI: Error while updating region "
"%s/%d (%08x != %08x)\n", dev->slot_name, resource,
new, check);
}
}
void pcibios_align_resource(void *data, struct resource *res,
unsigned long size)
{
struct pci_dev *dev = data;
if (res->flags & IORESOURCE_IO) {
unsigned long start = res->start;
/* We need to avoid collisions with `mirrored' VGA ports
and other strange ISA hardware, so we always want the
addresses kilobyte aligned. */
if (size > 0x100) {
printk(KERN_ERR "PCI: I/O Region %s/%d too large"
" (%ld bytes)\n", dev->slot_name,
dev->resource - res, size);
}
start = (start + 1024 - 1) & ~(1024 - 1);
res->start = start;
}
}
unsigned __init int pcibios_assign_all_busses(void)
{
return 1;
}
struct pci_fixup pcibios_fixups[] = { };
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