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path: root/arch/mips/pci/ops-tx4938.c
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Diffstat (limited to 'arch/mips/pci/ops-tx4938.c')
-rw-r--r--arch/mips/pci/ops-tx4938.c80
1 files changed, 48 insertions, 32 deletions
diff --git a/arch/mips/pci/ops-tx4938.c b/arch/mips/pci/ops-tx4938.c
index 445007084515..a450c4062031 100644
--- a/arch/mips/pci/ops-tx4938.c
+++ b/arch/mips/pci/ops-tx4938.c
@@ -46,50 +46,63 @@ struct resource tx4938_pcic1_pci_mem_resource = {
.flags = IORESOURCE_MEM
};
-static int mkaddr(int bus, int dev_fn, int where, int *flagsp)
+static int mkaddr(int bus, int dev_fn, int where,
+ struct tx4938_pcic_reg *pcicptr)
{
if (bus > 0) {
/* Type 1 configuration */
- tx4938_pcicptr->g2pcfgadrs = ((bus & 0xff) << 0x10) |
+ pcicptr->g2pcfgadrs = ((bus & 0xff) << 0x10) |
((dev_fn & 0xff) << 0x08) | (where & 0xfc) | 1;
} else {
if (dev_fn >= PCI_DEVFN(TX4938_PCIC_MAX_DEVNU, 0))
return -1;
/* Type 0 configuration */
- tx4938_pcicptr->g2pcfgadrs = ((bus & 0xff) << 0x10) |
+ pcicptr->g2pcfgadrs = ((bus & 0xff) << 0x10) |
((dev_fn & 0xff) << 0x08) | (where & 0xfc);
}
/* clear M_ABORT and Disable M_ABORT Int. */
- tx4938_pcicptr->pcistatus =
- (tx4938_pcicptr->pcistatus & 0x0000ffff) |
+ pcicptr->pcistatus =
+ (pcicptr->pcistatus & 0x0000ffff) |
(PCI_STATUS_REC_MASTER_ABORT << 16);
- tx4938_pcicptr->pcimask &= ~PCI_STATUS_REC_MASTER_ABORT;
+ pcicptr->pcimask &= ~PCI_STATUS_REC_MASTER_ABORT;
return 0;
}
-static int check_abort(int flags)
+static int check_abort(struct tx4938_pcic_reg *pcicptr)
{
int code = PCIBIOS_SUCCESSFUL;
/* wait write cycle completion before checking error status */
- while (tx4938_pcicptr->pcicstatus & TX4938_PCIC_PCICSTATUS_IWB)
+ while (pcicptr->pcicstatus & TX4938_PCIC_PCICSTATUS_IWB)
;
- if (tx4938_pcicptr->pcistatus & (PCI_STATUS_REC_MASTER_ABORT << 16)) {
- tx4938_pcicptr->pcistatus =
- (tx4938_pcicptr->
+ if (pcicptr->pcistatus & (PCI_STATUS_REC_MASTER_ABORT << 16)) {
+ pcicptr->pcistatus =
+ (pcicptr->
pcistatus & 0x0000ffff) | (PCI_STATUS_REC_MASTER_ABORT
<< 16);
- tx4938_pcicptr->pcimask |= PCI_STATUS_REC_MASTER_ABORT;
+ pcicptr->pcimask |= PCI_STATUS_REC_MASTER_ABORT;
code = PCIBIOS_DEVICE_NOT_FOUND;
}
return code;
}
+extern struct pci_controller tx4938_pci_controller[];
+extern struct tx4938_pcic_reg *get_tx4938_pcicptr(int ch);
+
+static struct tx4938_pcic_reg *pci_bus_to_pcicptr(struct pci_bus *bus)
+{
+ struct pci_controller *channel = bus->sysdata;
+ return get_tx4938_pcicptr(channel - &tx4938_pci_controller[0]);
+}
+
static int tx4938_pcibios_read_config(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 * val)
{
- int flags, retval, dev, busno, func;
+ int retval, dev, busno, func;
+ struct tx4938_pcic_reg *pcicptr = pci_bus_to_pcicptr(bus);
+ void __iomem *cfgdata =
+ (void __iomem *)(unsigned long)&pcicptr->g2pcfgdata;
dev = PCI_SLOT(devfn);
func = PCI_FUNC(devfn);
@@ -101,32 +114,32 @@ static int tx4938_pcibios_read_config(struct pci_bus *bus, unsigned int devfn,
busno = 0;
}
- if (mkaddr(busno, devfn, where, &flags))
+ if (mkaddr(busno, devfn, where, pcicptr))
return -1;
switch (size) {
case 1:
- *val = *(volatile u8 *) ((unsigned long) & tx4938_pcicptr->g2pcfgdata |
#ifdef __BIG_ENDIAN
- ((where & 3) ^ 3));
+ cfgdata += (where & 3) ^ 3;
#else
- (where & 3));
+ cfgdata += where & 3;
#endif
+ *val = __raw_readb(cfgdata);
break;
case 2:
- *val = *(volatile u16 *) ((unsigned long) & tx4938_pcicptr->g2pcfgdata |
#ifdef __BIG_ENDIAN
- ((where & 3) ^ 2));
+ cfgdata += (where & 2) ^ 2;
#else
- (where & 3));
+ cfgdata += where & 2;
#endif
+ *val = __raw_readw(cfgdata);
break;
case 4:
- *val = tx4938_pcicptr->g2pcfgdata;
+ *val = __raw_readl(cfgdata);
break;
}
- retval = check_abort(flags);
+ retval = check_abort(pcicptr);
if (retval == PCIBIOS_DEVICE_NOT_FOUND)
*val = 0xffffffff;
@@ -136,7 +149,10 @@ static int tx4938_pcibios_read_config(struct pci_bus *bus, unsigned int devfn,
static int tx4938_pcibios_write_config(struct pci_bus *bus, unsigned int devfn, int where,
int size, u32 val)
{
- int flags, dev, busno, func;
+ int dev, busno, func;
+ struct tx4938_pcic_reg *pcicptr = pci_bus_to_pcicptr(bus);
+ void __iomem *cfgdata =
+ (void __iomem *)(unsigned long)&pcicptr->g2pcfgdata;
busno = bus->number;
dev = PCI_SLOT(devfn);
@@ -149,32 +165,32 @@ static int tx4938_pcibios_write_config(struct pci_bus *bus, unsigned int devfn,
busno = 0;
}
- if (mkaddr(busno, devfn, where, &flags))
+ if (mkaddr(busno, devfn, where, pcicptr))
return -1;
switch (size) {
case 1:
- *(volatile u8 *) ((unsigned long) & tx4938_pcicptr->g2pcfgdata |
#ifdef __BIG_ENDIAN
- ((where & 3) ^ 3)) = val;
+ cfgdata += (where & 3) ^ 3;
#else
- (where & 3)) = val;
+ cfgdata += where & 3;
#endif
+ __raw_writeb(val, cfgdata);
break;
case 2:
- *(volatile u16 *) ((unsigned long) & tx4938_pcicptr->g2pcfgdata |
#ifdef __BIG_ENDIAN
- ((where & 0x3) ^ 0x2)) = val;
+ cfgdata += (where & 2) ^ 2;
#else
- (where & 3)) = val;
+ cfgdata += where & 2;
#endif
+ __raw_writew(val, cfgdata);
break;
case 4:
- tx4938_pcicptr->g2pcfgdata = val;
+ __raw_writel(val, cfgdata);
break;
}
- return check_abort(flags);
+ return check_abort(pcicptr);
}
struct pci_ops tx4938_pci_ops = {