mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-24 07:46:48 +00:00
387 lines
9.6 KiB
C
387 lines
9.6 KiB
C
/*
|
|
* Low-Level PCI and SB support for BCM47xx (Linux support code)
|
|
*
|
|
* Copyright 2006, Broadcom Corporation
|
|
* All Rights Reserved.
|
|
*
|
|
* THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
|
|
* KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
|
|
* SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
|
|
* FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
|
|
*
|
|
* $Id: pcibios.c,v 1.1.1.9 2006/02/27 03:42:55 honor Exp $
|
|
*/
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/init.h>
|
|
#include <linux/delay.h>
|
|
#include <asm/io.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/paccess.h>
|
|
|
|
#include <typedefs.h>
|
|
#include <osl.h>
|
|
#include <bcmutils.h>
|
|
#include <sbconfig.h>
|
|
#include <sbutils.h>
|
|
#include <hndpci.h>
|
|
#include <pcicfg.h>
|
|
#include <bcmdevs.h>
|
|
#include <bcmnvram.h>
|
|
|
|
/* Global SB handle */
|
|
extern sb_t *bcm947xx_sbh;
|
|
extern spinlock_t bcm947xx_sbh_lock;
|
|
|
|
/* Convenience */
|
|
#define sbh bcm947xx_sbh
|
|
#define sbh_lock bcm947xx_sbh_lock
|
|
|
|
static int
|
|
sbpci_read_config_byte(struct pci_dev *dev, int where, u8 *value)
|
|
{
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&sbh_lock, flags);
|
|
ret = sbpci_read_config(sbh, dev->bus->number, PCI_SLOT(dev->devfn),
|
|
PCI_FUNC(dev->devfn), where, value, sizeof(*value));
|
|
spin_unlock_irqrestore(&sbh_lock, flags);
|
|
return ret ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
static int
|
|
sbpci_read_config_word(struct pci_dev *dev, int where, u16 *value)
|
|
{
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&sbh_lock, flags);
|
|
ret = sbpci_read_config(sbh, dev->bus->number, PCI_SLOT(dev->devfn),
|
|
PCI_FUNC(dev->devfn), where, value, sizeof(*value));
|
|
spin_unlock_irqrestore(&sbh_lock, flags);
|
|
return ret ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
static int
|
|
sbpci_read_config_dword(struct pci_dev *dev, int where, u32 *value)
|
|
{
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&sbh_lock, flags);
|
|
ret = sbpci_read_config(sbh, dev->bus->number, PCI_SLOT(dev->devfn),
|
|
PCI_FUNC(dev->devfn), where, value, sizeof(*value));
|
|
spin_unlock_irqrestore(&sbh_lock, flags);
|
|
return ret ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
static int
|
|
sbpci_write_config_byte(struct pci_dev *dev, int where, u8 value)
|
|
{
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&sbh_lock, flags);
|
|
ret = sbpci_write_config(sbh, dev->bus->number, PCI_SLOT(dev->devfn),
|
|
PCI_FUNC(dev->devfn), where, &value, sizeof(value));
|
|
spin_unlock_irqrestore(&sbh_lock, flags);
|
|
return ret ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
static int
|
|
sbpci_write_config_word(struct pci_dev *dev, int where, u16 value)
|
|
{
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&sbh_lock, flags);
|
|
ret = sbpci_write_config(sbh, dev->bus->number, PCI_SLOT(dev->devfn),
|
|
PCI_FUNC(dev->devfn), where, &value, sizeof(value));
|
|
spin_unlock_irqrestore(&sbh_lock, flags);
|
|
return ret ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
static int
|
|
sbpci_write_config_dword(struct pci_dev *dev, int where, u32 value)
|
|
{
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
spin_lock_irqsave(&sbh_lock, flags);
|
|
ret = sbpci_write_config(sbh, dev->bus->number, PCI_SLOT(dev->devfn),
|
|
PCI_FUNC(dev->devfn), where, &value, sizeof(value));
|
|
spin_unlock_irqrestore(&sbh_lock, flags);
|
|
return ret ? PCIBIOS_DEVICE_NOT_FOUND : PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
static struct pci_ops pcibios_ops = {
|
|
sbpci_read_config_byte,
|
|
sbpci_read_config_word,
|
|
sbpci_read_config_dword,
|
|
sbpci_write_config_byte,
|
|
sbpci_write_config_word,
|
|
sbpci_write_config_dword
|
|
};
|
|
|
|
|
|
void __init
|
|
pcibios_init(void)
|
|
{
|
|
ulong flags;
|
|
|
|
if (!(sbh = sb_kattach()))
|
|
panic("sb_kattach failed");
|
|
spin_lock_init(&sbh_lock);
|
|
|
|
spin_lock_irqsave(&sbh_lock, flags);
|
|
sbpci_init(sbh);
|
|
spin_unlock_irqrestore(&sbh_lock, flags);
|
|
|
|
set_io_port_base((unsigned long) ioremap_nocache(SB_PCI_MEM, 0x04000000));
|
|
|
|
/* Scan the SB bus */
|
|
pci_scan_bus(0, &pcibios_ops, NULL);
|
|
|
|
}
|
|
|
|
char * __init
|
|
pcibios_setup(char *str)
|
|
{
|
|
if (!strncmp(str, "ban=", 4)) {
|
|
sbpci_ban(simple_strtoul(str + 4, NULL, 0));
|
|
return NULL;
|
|
}
|
|
|
|
return (str);
|
|
}
|
|
|
|
static u32 pci_iobase = 0x100;
|
|
static u32 pci_membase = SB_PCI_DMA;
|
|
static u32 pcmcia_membase = 0x40004000;
|
|
|
|
void __init
|
|
pcibios_fixup_bus(struct pci_bus *b)
|
|
{
|
|
struct list_head *ln;
|
|
struct pci_dev *d;
|
|
struct resource *res;
|
|
int pos, size;
|
|
u32 *base;
|
|
u8 irq;
|
|
|
|
printk("PCI: Fixing up bus %d\n", b->number);
|
|
|
|
/* Fix up SB */
|
|
if (b->number == 0) {
|
|
for (ln = b->devices.next; ln != &b->devices; ln = ln->next) {
|
|
d = pci_dev_b(ln);
|
|
/* Fix up interrupt lines */
|
|
pci_read_config_byte(d, PCI_INTERRUPT_LINE, &irq);
|
|
d->irq = irq + 2;
|
|
pci_write_config_byte(d, PCI_INTERRUPT_LINE, d->irq);
|
|
}
|
|
}
|
|
|
|
/* Fix up external PCI */
|
|
else {
|
|
for (ln = b->devices.next; ln != &b->devices; ln = ln->next) {
|
|
d = pci_dev_b(ln);
|
|
/* Fix up resource bases */
|
|
for (pos = 0; pos < 6; pos++) {
|
|
res = &d->resource[pos];
|
|
base = (res->flags & IORESOURCE_IO) ? &pci_iobase : ((b->number == 2) ? &pcmcia_membase : &pci_membase);
|
|
if (res->end) {
|
|
size = res->end - res->start + 1;
|
|
if (*base & (size - 1))
|
|
*base = (*base + size) & ~(size - 1);
|
|
res->start = *base;
|
|
res->end = res->start + size - 1;
|
|
*base += size;
|
|
pci_write_config_dword(d,
|
|
PCI_BASE_ADDRESS_0 + (pos << 2), res->start);
|
|
}
|
|
/* Fix up PCI bridge BAR0 only */
|
|
if (b->number == 1 && PCI_SLOT(d->devfn) == 0)
|
|
break;
|
|
}
|
|
/* Fix up interrupt lines */
|
|
if (pci_find_device(VENDOR_BROADCOM, SB_PCI, NULL))
|
|
d->irq = (pci_find_device(VENDOR_BROADCOM, SB_PCI, NULL))->irq;
|
|
pci_write_config_byte(d, PCI_INTERRUPT_LINE, d->irq);
|
|
}
|
|
}
|
|
}
|
|
|
|
unsigned int
|
|
pcibios_assign_all_busses(void)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
void
|
|
pcibios_align_resource(void *data, struct resource *res,
|
|
unsigned long size, unsigned long align)
|
|
{
|
|
}
|
|
|
|
int
|
|
pcibios_enable_resources(struct pci_dev *dev)
|
|
{
|
|
u16 cmd, old_cmd;
|
|
int idx;
|
|
struct resource *r;
|
|
|
|
/* External PCI only */
|
|
if (dev->bus->number == 0)
|
|
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->flags & IORESOURCE_IO)
|
|
cmd |= PCI_COMMAND_IO;
|
|
if (r->flags & IORESOURCE_MEM)
|
|
cmd |= PCI_COMMAND_MEMORY;
|
|
}
|
|
if (dev->resource[PCI_ROM_RESOURCE].start)
|
|
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, int mask)
|
|
{
|
|
ulong flags;
|
|
uint coreidx;
|
|
void *regs;
|
|
|
|
/* External PCI device enable */
|
|
if (dev->bus->number != 0)
|
|
return pcibios_enable_resources(dev);
|
|
|
|
/* These cores come out of reset enabled */
|
|
if (dev->device == SB_MIPS ||
|
|
dev->device == SB_MIPS33 ||
|
|
dev->device == SB_EXTIF ||
|
|
dev->device == SB_CC)
|
|
return 0;
|
|
|
|
spin_lock_irqsave(&sbh_lock, flags);
|
|
coreidx = sb_coreidx(sbh);
|
|
regs = sb_setcoreidx(sbh, PCI_SLOT(dev->devfn));
|
|
if (!regs)
|
|
return PCIBIOS_DEVICE_NOT_FOUND;
|
|
|
|
/*
|
|
* The USB core requires a special bit to be set during core
|
|
* reset to enable host (OHCI) mode. Resetting the SB core in
|
|
* pcibios_enable_device() is a hack for compatibility with
|
|
* vanilla usb-ohci so that it does not have to know about
|
|
* SB. A driver that wants to use the USB core in device mode
|
|
* should know about SB and should reset the bit back to 0
|
|
* after calling pcibios_enable_device().
|
|
*/
|
|
if (sb_coreid(sbh) == SB_USB) {
|
|
sb_core_disable(sbh, sb_coreflags(sbh, 0, 0));
|
|
sb_core_reset(sbh, 1 << 29, 0);
|
|
}
|
|
/*
|
|
* USB 2.0 special considerations:
|
|
*
|
|
* 1. Since the core supports both OHCI and EHCI functions, it must
|
|
* only be reset once.
|
|
*
|
|
* 2. In addition to the standard SB reset sequence, the Host Control
|
|
* Register must be programmed to bring the USB core and various
|
|
* phy components out of reset.
|
|
*/
|
|
else if (sb_coreid(sbh) == SB_USB20H) {
|
|
if (!sb_iscoreup(sbh)) {
|
|
sb_core_reset(sbh, 0, 0);
|
|
writel(0x7FF, (ulong)regs + 0x200);
|
|
udelay(1);
|
|
}
|
|
} else
|
|
sb_core_reset(sbh, 0, 0);
|
|
|
|
sb_setcoreidx(sbh, coreidx);
|
|
spin_unlock_irqrestore(&sbh_lock, flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
pcibios_update_resource(struct pci_dev *dev, struct resource *root,
|
|
struct resource *res, int resource)
|
|
{
|
|
unsigned long where, size;
|
|
u32 reg;
|
|
|
|
/* External PCI only */
|
|
if (dev->bus->number == 0)
|
|
return;
|
|
|
|
where = PCI_BASE_ADDRESS_0 + (resource * 4);
|
|
size = res->end - res->start;
|
|
pci_read_config_dword(dev, where, ®);
|
|
|
|
if (dev->bus->number == 1)
|
|
reg = (reg & size) | (((u32)(res->start - root->start)) & ~size);
|
|
else
|
|
reg = res->start;
|
|
|
|
pci_write_config_dword(dev, where, reg);
|
|
}
|
|
|
|
static void __init
|
|
quirk_sbpci_bridge(struct pci_dev *dev)
|
|
{
|
|
if (dev->bus->number != 1 || PCI_SLOT(dev->devfn) != 0)
|
|
return;
|
|
|
|
printk("PCI: Fixing up bridge\n");
|
|
|
|
/* Enable PCI bridge bus mastering and memory space */
|
|
pci_set_master(dev);
|
|
pcibios_enable_resources(dev);
|
|
|
|
/* Enable PCI bridge BAR1 prefetch and burst */
|
|
pci_write_config_dword(dev, PCI_BAR1_CONTROL, 3);
|
|
}
|
|
|
|
struct pci_fixup pcibios_fixups[] = {
|
|
{ PCI_FIXUP_HEADER, PCI_ANY_ID, PCI_ANY_ID, quirk_sbpci_bridge },
|
|
{ 0 }
|
|
};
|
|
|
|
/*
|
|
* If we set up a device for bus mastering, we need to check the latency
|
|
* timer as certain crappy BIOSes forget to set it properly.
|
|
*/
|
|
unsigned int pcibios_max_latency = 255;
|
|
|
|
void pcibios_set_master(struct pci_dev *dev)
|
|
{
|
|
u8 lat;
|
|
pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat);
|
|
if (lat < 16)
|
|
lat = (64 <= pcibios_max_latency) ? 64 : pcibios_max_latency;
|
|
else if (lat > pcibios_max_latency)
|
|
lat = pcibios_max_latency;
|
|
else
|
|
return;
|
|
printk(KERN_DEBUG "PCI: Setting latency timer of device %s to %d\n", dev->slot_name, lat);
|
|
pci_write_config_byte(dev, PCI_LATENCY_TIMER, lat);
|
|
}
|
|
|