278 lines
6.3 KiB
C
278 lines
6.3 KiB
C
/*
|
|
* ADM5120 PCI Host Controller driver
|
|
*
|
|
* Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org>
|
|
*
|
|
* This code was based on the ADM5120 specific port of the Linux 2.6.10 kernel
|
|
* done by Jeroen Vreeken
|
|
* Copyright (C) 2005 Jeroen Vreeken (pe1rxq@amsat.org)
|
|
*
|
|
* Jeroen's code was based on the Linux 2.4.xx source codes found in various
|
|
* tarballs released by Edimax for it's ADM5120 based devices
|
|
* Copyright (C) ADMtek Incorporated
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License version 2 as published
|
|
* by the Free Software Foundation.
|
|
*
|
|
*/
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/io.h>
|
|
#include <linux/delay.h>
|
|
|
|
#include <linux/pci.h>
|
|
#include <linux/pci_ids.h>
|
|
#include <linux/pci_regs.h>
|
|
|
|
#include <asm/bootinfo.h>
|
|
|
|
#include <asm/mach-adm5120/adm5120_defs.h>
|
|
#include <asm/mach-adm5120/adm5120_info.h>
|
|
#include <asm/mach-adm5120/adm5120_defs.h>
|
|
#include <asm/mach-adm5120/adm5120_platform.h>
|
|
|
|
#undef DEBUG
|
|
|
|
#ifdef DEBUG
|
|
#define DBG(f, a...) printk(KERN_DEBUG f, ## a)
|
|
#else
|
|
#define DBG(f, a...) do {} while (0)
|
|
#endif
|
|
|
|
#define PCI_ENABLE 0x80000000
|
|
|
|
/* -------------------------------------------------------------------------*/
|
|
|
|
static unsigned int adm5120_pci_nr_irqs __initdata;
|
|
static struct adm5120_pci_irq *adm5120_pci_irq_map __initdata;
|
|
|
|
static DEFINE_SPINLOCK(pci_lock);
|
|
|
|
/* -------------------------------------------------------------------------*/
|
|
|
|
static inline void write_cfgaddr(u32 addr)
|
|
{
|
|
__raw_writel((addr | PCI_ENABLE),
|
|
(void __iomem *)(KSEG1ADDR(ADM5120_PCICFG_ADDR)));
|
|
}
|
|
|
|
static inline void write_cfgdata(u32 data)
|
|
{
|
|
__raw_writel(data, (void __iomem *)KSEG1ADDR(ADM5120_PCICFG_DATA));
|
|
}
|
|
|
|
static inline u32 read_cfgdata(void)
|
|
{
|
|
return __raw_readl((void __iomem *)KSEG1ADDR(ADM5120_PCICFG_DATA));
|
|
}
|
|
|
|
static inline u32 mkaddr(struct pci_bus *bus, unsigned int devfn, int where)
|
|
{
|
|
return ((bus->number & 0xFF) << 16) | ((devfn & 0xFF) << 8) | \
|
|
(where & 0xFC);
|
|
}
|
|
|
|
/* -------------------------------------------------------------------------*/
|
|
|
|
static int pci_config_read(struct pci_bus *bus, unsigned int devfn, int where,
|
|
int size, u32 *val)
|
|
{
|
|
unsigned long flags;
|
|
u32 data;
|
|
|
|
spin_lock_irqsave(&pci_lock, flags);
|
|
|
|
write_cfgaddr(mkaddr(bus, devfn, where));
|
|
data = read_cfgdata();
|
|
|
|
DBG("PCI: cfg_read %02u.%02u.%01u/%02X:%01d, cfg:0x%08X",
|
|
bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn),
|
|
where, size, data);
|
|
|
|
switch (size) {
|
|
case 1:
|
|
if (where & 1)
|
|
data >>= 8;
|
|
if (where & 2)
|
|
data >>= 16;
|
|
data &= 0xFF;
|
|
break;
|
|
case 2:
|
|
if (where & 2)
|
|
data >>= 16;
|
|
data &= 0xFFFF;
|
|
break;
|
|
}
|
|
|
|
*val = data;
|
|
DBG(", 0x%08X returned\n", data);
|
|
|
|
spin_unlock_irqrestore(&pci_lock, flags);
|
|
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
static int pci_config_write(struct pci_bus *bus, unsigned int devfn, int where,
|
|
int size, u32 val)
|
|
{
|
|
unsigned long flags;
|
|
u32 data;
|
|
int s;
|
|
|
|
spin_lock_irqsave(&pci_lock, flags);
|
|
|
|
write_cfgaddr(mkaddr(bus, devfn, where));
|
|
data = read_cfgdata();
|
|
|
|
DBG("PCI: cfg_write %02u.%02u.%01u/%02X:%01d, cfg:0x%08X",
|
|
bus->number, PCI_SLOT(devfn), PCI_FUNC(devfn),
|
|
where, size, data);
|
|
|
|
switch (size) {
|
|
case 1:
|
|
s = ((where & 3) << 3);
|
|
data &= ~(0xFF << s);
|
|
data |= ((val & 0xFF) << s);
|
|
break;
|
|
case 2:
|
|
s = ((where & 2) << 4);
|
|
data &= ~(0xFFFF << s);
|
|
data |= ((val & 0xFFFF) << s);
|
|
break;
|
|
case 4:
|
|
data = val;
|
|
break;
|
|
}
|
|
|
|
write_cfgdata(data);
|
|
DBG(", 0x%08X written\n", data);
|
|
|
|
spin_unlock_irqrestore(&pci_lock, flags);
|
|
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
struct pci_ops adm5120_pci_ops = {
|
|
.read = pci_config_read,
|
|
.write = pci_config_write,
|
|
};
|
|
|
|
/* -------------------------------------------------------------------------*/
|
|
|
|
static void adm5120_pci_fixup(struct pci_dev *dev)
|
|
{
|
|
if (dev->devfn != 0)
|
|
return;
|
|
|
|
/* setup COMMAND register */
|
|
pci_write_config_word(dev, PCI_COMMAND,
|
|
(PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER));
|
|
|
|
/* setup CACHE_LINE_SIZE register */
|
|
pci_write_config_byte(dev, PCI_CACHE_LINE_SIZE, 4);
|
|
|
|
/* setup BARS */
|
|
pci_write_config_dword(dev, PCI_BASE_ADDRESS_0, 0);
|
|
pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, 0);
|
|
}
|
|
|
|
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ADMTEK, PCI_DEVICE_ID_ADMTEK_ADM5120,
|
|
adm5120_pci_fixup);
|
|
|
|
/* -------------------------------------------------------------------------*/
|
|
|
|
void __init adm5120_pci_set_irq_map(unsigned int nr_irqs,
|
|
struct adm5120_pci_irq *map)
|
|
{
|
|
adm5120_pci_nr_irqs = nr_irqs;
|
|
adm5120_pci_irq_map = map;
|
|
}
|
|
|
|
int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
|
|
{
|
|
int irq = -1;
|
|
int i;
|
|
|
|
if ((!adm5120_pci_nr_irqs) || (!adm5120_pci_irq_map)) {
|
|
printk(KERN_ALERT "PCI: pci_irq_map is not initialized\n");
|
|
goto out;
|
|
}
|
|
|
|
if (slot < 1 || slot > 4) {
|
|
printk(KERN_ALERT "PCI: slot number %u is not supported\n",
|
|
slot);
|
|
goto out;
|
|
}
|
|
|
|
for (i = 0; i < adm5120_pci_nr_irqs; i++) {
|
|
if ((adm5120_pci_irq_map[i].slot == slot)
|
|
&& (adm5120_pci_irq_map[i].func == PCI_FUNC(dev->devfn))
|
|
&& (adm5120_pci_irq_map[i].pin == pin)) {
|
|
irq = adm5120_pci_irq_map[i].irq;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (irq < 0) {
|
|
printk(KERN_ALERT "PCI: no irq found for %s pin:%u\n",
|
|
pci_name((struct pci_dev *)dev), pin);
|
|
} else {
|
|
printk(KERN_INFO "PCI: mapping irq for %s pin:%u, irq:%d\n",
|
|
pci_name((struct pci_dev *)dev), pin, irq);
|
|
}
|
|
|
|
out:
|
|
return irq;
|
|
}
|
|
|
|
int pcibios_plat_dev_init(struct pci_dev *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
/* -------------------------------------------------------------------------*/
|
|
|
|
static struct resource pci_io_resource = {
|
|
.name = "ADM5120 PCI I/O",
|
|
.start = ADM5120_PCIIO_BASE,
|
|
.end = ADM5120_PCICFG_ADDR-1,
|
|
.flags = IORESOURCE_IO
|
|
};
|
|
|
|
static struct resource pci_mem_resource = {
|
|
.name = "ADM5120 PCI MEM",
|
|
.start = ADM5120_PCIMEM_BASE,
|
|
.end = ADM5120_PCIIO_BASE-1,
|
|
.flags = IORESOURCE_MEM
|
|
};
|
|
|
|
static struct pci_controller adm5120_controller = {
|
|
.pci_ops = &adm5120_pci_ops,
|
|
.io_resource = &pci_io_resource,
|
|
.mem_resource = &pci_mem_resource,
|
|
};
|
|
|
|
static int __init adm5120_pci_setup(void)
|
|
{
|
|
if (adm5120_package_pqfp()) {
|
|
printk(KERN_INFO "PCI: not available on ADM5120P\n");
|
|
return -1;
|
|
}
|
|
|
|
/* Avoid ISA compat ranges. */
|
|
PCIBIOS_MIN_IO = 0x00000000;
|
|
PCIBIOS_MIN_MEM = 0x00000000;
|
|
|
|
/* Set I/O resource limits. */
|
|
ioport_resource.end = 0x1fffffff;
|
|
iomem_resource.end = 0xffffffff;
|
|
|
|
register_pci_controller(&adm5120_controller);
|
|
return 0;
|
|
}
|
|
|
|
arch_initcall(adm5120_pci_setup);
|