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openwrt-xburst/target/linux/ar7-2.6/files/arch/mips/ar7/vlynq-pci.c
florian 631f7403d8 Fix the IRQ assignment with vlynq/pci, thanks sw ! (#1865)
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7689 3c298f89-4303-0410-b956-a3cf2f4a3e73
2007-06-21 17:20:19 +00:00

403 lines
9.1 KiB
C

/*
* $Id$
*
* Copyright (C) 2006, 2007 OpenWrt.org
*
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <asm/ar7/vlynq.h>
#define VLYNQ_PCI_SLOTS 2
struct vlynq_reg_config {
u32 offset;
u32 value;
};
struct vlynq_pci_config {
u32 chip_id;
char name[32];
struct vlynq_mapping rx_mapping[4];
int irq;
int irq_type;
u32 chip;
u32 class;
int num_regs;
struct vlynq_reg_config regs[10];
};
struct vlynq_pci_private {
u32 latency;
u32 cache_line;
u32 command;
u32 sz_mask;
struct vlynq_pci_config *config;
};
static struct vlynq_pci_config known_devices[] = {
{
.chip_id = 0x00000009, .name = "TI ACX111",
.rx_mapping = {
{ .size = 0x22000, .offset = 0xf0000000 },
{ .size = 0x40000, .offset = 0xc0000000 },
{ .size = 0x0, .offset = 0x0 },
{ .size = 0x0, .offset = 0x0 },
},
.irq = 0, .chip = 0x9066104c,
.irq_type = IRQ_TYPE_EDGE_RISING,
.class = PCI_CLASS_NETWORK_OTHER,
.num_regs = 5,
.regs = {
{ .offset = 0x790, .value = (0xd0000000 - (ARCH_PFN_OFFSET << PAGE_SHIFT)) },
{ .offset = 0x794, .value = (0xd0000000 - (ARCH_PFN_OFFSET << PAGE_SHIFT)) },
{ .offset = 0x740, .value = 0 },
{ .offset = 0x744, .value = 0x00010000 },
{ .offset = 0x764, .value = 0x00010000 },
},
},
};
static struct vlynq_device *slots[VLYNQ_PCI_SLOTS] = { NULL, };
static struct resource vlynq_io_resource = {
.start = 0x00000000,
.end = 0x00000000,
.name = "pci IO space",
.flags = IORESOURCE_IO
};
static struct resource vlynq_mem_resource = {
.start = 0x00000000,
.end = 0x00000000,
.name = "pci memory space",
.flags = IORESOURCE_MEM
};
static inline u32 vlynq_get_mapped(struct vlynq_device *dev, int res)
{
int i;
struct vlynq_pci_private *priv = dev->priv;
u32 ret = dev->mem_start;
if (!priv->config->rx_mapping[res].size) return 0;
for (i = 0; i < res; i++)
ret += priv->config->rx_mapping[i].size;
return ret;
}
static inline u32 vlynq_read(u32 val, int size) {
switch (size) {
case 1:
return *(u8 *)&val;
case 2:
return *(u16 *)&val;
}
return val;
}
static int vlynq_config_read(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val)
{
struct vlynq_device *dev;
struct vlynq_pci_private *priv;
int resno, slot = PCI_SLOT(devfn);
if ((size == 2) && (where & 1))
return PCIBIOS_BAD_REGISTER_NUMBER;
else if ((size == 4) && (where & 3))
return PCIBIOS_BAD_REGISTER_NUMBER;
if (slot >= VLYNQ_PCI_SLOTS)
return PCIBIOS_DEVICE_NOT_FOUND;
dev = slots[slot];
if (!dev || (PCI_FUNC(devfn) > 0))
return PCIBIOS_DEVICE_NOT_FOUND;
priv = dev->priv;
switch (where) {
case PCI_VENDOR_ID:
*val = vlynq_read(priv->config->chip, size);
break;
case PCI_DEVICE_ID:
*val = priv->config->chip & 0xffff;
case PCI_COMMAND:
*val = priv->command;
case PCI_STATUS:
/* *val = PCI_STATUS_CAP_LIST;*/
*val = 0;
break;
case PCI_CLASS_REVISION:
*val = priv->config->class;
break;
case PCI_LATENCY_TIMER:
*val = priv->latency;
break;
case PCI_HEADER_TYPE:
*val = PCI_HEADER_TYPE_NORMAL;
break;
case PCI_CACHE_LINE_SIZE:
*val = priv->cache_line;
break;
case PCI_BASE_ADDRESS_0:
case PCI_BASE_ADDRESS_1:
case PCI_BASE_ADDRESS_2:
case PCI_BASE_ADDRESS_3:
resno = (where - PCI_BASE_ADDRESS_0) >> 2;
if (priv->sz_mask & (1 << resno)) {
priv->sz_mask &= ~(1 << resno);
*val = priv->config->rx_mapping[resno].size;
} else {
*val = vlynq_get_mapped(dev, resno);
}
break;
case PCI_BASE_ADDRESS_4:
case PCI_BASE_ADDRESS_5:
case PCI_SUBSYSTEM_VENDOR_ID:
case PCI_SUBSYSTEM_ID:
case PCI_ROM_ADDRESS:
case PCI_INTERRUPT_LINE:
case PCI_CARDBUS_CIS:
case PCI_CAPABILITY_LIST:
*val = 0;
break;
case PCI_INTERRUPT_PIN:
*val = 1;
break;
default:
printk("%s: Read of unknown register 0x%x (size %d)\n",
dev->dev.bus_id, where, size);
return PCIBIOS_BAD_REGISTER_NUMBER;
}
return PCIBIOS_SUCCESSFUL;
}
static int vlynq_config_write(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val)
{
struct vlynq_device *dev;
struct vlynq_pci_private *priv;
int resno, slot = PCI_SLOT(devfn);
if ((size == 2) && (where & 1))
return PCIBIOS_BAD_REGISTER_NUMBER;
else if ((size == 4) && (where & 3))
return PCIBIOS_BAD_REGISTER_NUMBER;
if (slot >= VLYNQ_PCI_SLOTS)
return PCIBIOS_DEVICE_NOT_FOUND;
dev = slots[slot];
if (!dev || (PCI_FUNC(devfn) > 0))
return PCIBIOS_DEVICE_NOT_FOUND;
priv = dev->priv;
switch (where) {
case PCI_VENDOR_ID:
case PCI_DEVICE_ID:
case PCI_STATUS:
case PCI_CLASS_REVISION:
case PCI_HEADER_TYPE:
case PCI_CACHE_LINE_SIZE:
case PCI_SUBSYSTEM_VENDOR_ID:
case PCI_SUBSYSTEM_ID:
case PCI_INTERRUPT_LINE:
case PCI_INTERRUPT_PIN:
case PCI_CARDBUS_CIS:
case PCI_CAPABILITY_LIST:
return PCIBIOS_FUNC_NOT_SUPPORTED;
case PCI_COMMAND:
priv->command = val;
case PCI_LATENCY_TIMER:
priv->latency = val;
break;
case PCI_BASE_ADDRESS_0:
case PCI_BASE_ADDRESS_1:
case PCI_BASE_ADDRESS_2:
case PCI_BASE_ADDRESS_3:
if (val == 0xffffffff) {
resno = (where - PCI_BASE_ADDRESS_0) >> 2;
priv->sz_mask |= (1 << resno);
break;
}
case PCI_BASE_ADDRESS_4:
case PCI_BASE_ADDRESS_5:
case PCI_ROM_ADDRESS:
break;
default:
printk("%s: Write to unknown register 0x%x (size %d) value=0x%x\n",
dev->dev.bus_id, where, size, val);
return PCIBIOS_BAD_REGISTER_NUMBER;
}
return PCIBIOS_SUCCESSFUL;
}
static struct pci_ops vlynq_pci_ops = {
vlynq_config_read,
vlynq_config_write
};
static struct pci_controller vlynq_controller = {
.pci_ops = &vlynq_pci_ops,
.io_resource = &vlynq_io_resource,
.mem_resource = &vlynq_mem_resource,
};
static int vlynq_pci_probe(struct vlynq_device *dev)
{
int result, i;
u32 chip_id, addr;
struct vlynq_pci_private *priv;
struct vlynq_mapping mapping[4] = { { 0, }, };
struct vlynq_pci_config *config = NULL;
result = vlynq_set_local_irq(dev, 31);
if (result)
return result;
result = vlynq_set_remote_irq(dev, 30);
if (result)
return result;
result = vlynq_device_enable(dev);
if (result)
return result;
chip_id = vlynq_remote_id(dev);
for (i = 0; i < ARRAY_SIZE(known_devices); i++)
if (chip_id == known_devices[i].chip_id)
config = &known_devices[i];
if (!config) {
printk("vlynq-pci: skipping unknown device "
"%04x:%04x at %s\n", chip_id >> 16,
chip_id & 0xffff, dev->dev.bus_id);
result = -ENODEV;
goto fail;
}
printk("vlynq-pci: attaching device %s at %s\n",
config->name, dev->dev.bus_id);
priv = kmalloc(sizeof(struct vlynq_pci_private), GFP_KERNEL);
if (!priv) {
printk(KERN_ERR "%s: failed to allocate private data\n",
dev->dev.bus_id);
result = -ENOMEM;
goto fail;
}
memset(priv, 0, sizeof(struct vlynq_pci_private));
priv->latency = 64;
priv->cache_line = 32;
priv->config = config;
mapping[0].offset = ARCH_PFN_OFFSET << PAGE_SHIFT;
mapping[0].size = 0x02000000;
vlynq_set_local_mapping(dev, dev->mem_start, mapping);
vlynq_set_remote_mapping(dev, 0, config->rx_mapping);
set_irq_type(vlynq_virq_to_irq(dev, config->irq), config->irq_type);
addr = (u32)ioremap_nocache(dev->mem_start, 0x10000);
if (!addr) {
printk(KERN_ERR "%s: failed to remap io memory\n",
dev->dev.bus_id);
result = -ENXIO;
goto fail;
}
for (i = 0; i < config->num_regs; i++)
*(volatile u32 *)(addr + config->regs[i].offset) =
config->regs[i].value;
dev->priv = priv;
for (i = 0; i < VLYNQ_PCI_SLOTS; i++) {
if (!slots[i]) {
slots[i] = dev;
break;
}
}
return 0;
fail:
vlynq_device_disable(dev);
return result;
}
static int vlynq_pci_remove(struct vlynq_device *dev)
{
int i;
struct vlynq_pci_private *priv = dev->priv;
for (i = 0; i < VLYNQ_PCI_SLOTS; i++)
if (slots[i] == dev)
slots[i] = NULL;
vlynq_device_disable(dev);
kfree(priv);
return 0;
}
static struct vlynq_driver vlynq_pci = {
.name = "PCI over VLYNQ emulation",
.probe = vlynq_pci_probe,
.remove = vlynq_pci_remove,
};
int vlynq_pci_init(void)
{
int res;
res = vlynq_register_driver(&vlynq_pci);
if (res)
return res;
register_pci_controller(&vlynq_controller);
return 0;
}
int pcibios_map_irq(struct pci_dev *pdev, u8 slot, u8 pin)
{
struct vlynq_device *dev;
struct vlynq_pci_private *priv;
dev = slots[slot];
if (!dev)
return 0;
priv = dev->priv;
return vlynq_virq_to_irq(dev, priv->config->irq);
}
/* Do platform specific device initialization at pci_enable_device() time */
int pcibios_plat_dev_init(struct pci_dev *dev)
{
return 0;
}