int
ahc_pci_map_registers(struct ahc_softc *ahc)
{
struct resource *regs;
u_int command;
int regs_type;
int regs_id;
int allow_memio;
command = aic_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/1);
regs = NULL;
regs_type = 0;
regs_id = 0;
/* Retrieve the per-device 'allow_memio' hint */
if (resource_int_value(device_get_name(ahc->dev_softc),
device_get_unit(ahc->dev_softc),
"allow_memio", &allow_memio) != 0) {
if (bootverbose)
device_printf(ahc->dev_softc, "Defaulting to MEMIO ");
#ifdef AHC_ALLOW_MEMIO
if (bootverbose)
kprintf("on\n");
allow_memio = 1;
#else
if (bootverbose)
kprintf("off\n");
allow_memio = 0;
#endif
}
if ((allow_memio != 0) && (command & PCIM_CMD_MEMEN) != 0) {
regs_type = SYS_RES_MEMORY;
regs_id = AHC_PCI_MEMADDR;
regs = bus_alloc_resource_any(ahc->dev_softc, regs_type,
®s_id, RF_ACTIVE);
if (regs != NULL) {
ahc->tag = rman_get_bustag(regs);
ahc->bsh = rman_get_bushandle(regs);
/*
* Do a quick test to see if memory mapped
* I/O is functioning correctly.
*/
if (ahc_pci_test_register_access(ahc) != 0) {
device_printf(ahc->dev_softc,
"PCI Device %d:%d:%d failed memory "
"mapped test. Using PIO.\n",
aic_get_pci_bus(ahc->dev_softc),
aic_get_pci_slot(ahc->dev_softc),
aic_get_pci_function(ahc->dev_softc));
bus_release_resource(ahc->dev_softc, regs_type,
regs_id, regs);
regs = NULL;
} else {
command &= ~PCIM_CMD_PORTEN;
aic_pci_write_config(ahc->dev_softc,
PCIR_COMMAND,
command, /*bytes*/1);
}
}
}
if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) {
regs_type = SYS_RES_IOPORT;
regs_id = AHC_PCI_IOADDR;
regs = bus_alloc_resource_any(ahc->dev_softc, regs_type,
®s_id, RF_ACTIVE);
if (regs != NULL) {
ahc->tag = rman_get_bustag(regs);
ahc->bsh = rman_get_bushandle(regs);
if (ahc_pci_test_register_access(ahc) != 0) {
device_printf(ahc->dev_softc,
"PCI Device %d:%d:%d failed I/O "
"mapped test.\n",
aic_get_pci_bus(ahc->dev_softc),
aic_get_pci_slot(ahc->dev_softc),
aic_get_pci_function(ahc->dev_softc));
bus_release_resource(ahc->dev_softc, regs_type,
regs_id, regs);
regs = NULL;
} else {
command &= ~PCIM_CMD_MEMEN;
aic_pci_write_config(ahc->dev_softc,
PCIR_COMMAND,
command, /*bytes*/1);
}
}
}
if (regs == NULL) {
device_printf(ahc->dev_softc,
"can't allocate register resources\n");
return (ENOMEM);
}
ahc->platform_data->regs_res_type = regs_type;
ahc->platform_data->regs_res_id = regs_id;
ahc->platform_data->regs = regs;
return (0);
}
int
ahc_pci_map_registers(struct ahc_softc *ahc)
{
uint32_t command;
u_long base;
uint8_t __iomem *maddr;
int error;
/*
* If its allowed, we prefer memory mapped access.
*/
command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, 4);
command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
base = 0;
maddr = NULL;
error = ahc_linux_pci_reserve_mem_region(ahc, &base, &maddr);
if (error == 0) {
ahc->platform_data->mem_busaddr = base;
ahc->tag = BUS_SPACE_MEMIO;
ahc->bsh.maddr = maddr;
ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
command | PCIM_CMD_MEMEN, 4);
/*
* Do a quick test to see if memory mapped
* I/O is functioning correctly.
*/
if (ahc_pci_test_register_access(ahc) != 0) {
printf("aic7xxx: PCI Device %d:%d:%d "
"failed memory mapped test. Using PIO.\n",
ahc_get_pci_bus(ahc->dev_softc),
ahc_get_pci_slot(ahc->dev_softc),
ahc_get_pci_function(ahc->dev_softc));
iounmap(maddr);
release_mem_region(ahc->platform_data->mem_busaddr,
0x1000);
ahc->bsh.maddr = NULL;
maddr = NULL;
} else
command |= PCIM_CMD_MEMEN;
} else {
printf("aic7xxx: PCI%d:%d:%d MEM region 0x%lx "
"unavailable. Cannot memory map device.\n",
ahc_get_pci_bus(ahc->dev_softc),
ahc_get_pci_slot(ahc->dev_softc),
ahc_get_pci_function(ahc->dev_softc),
base);
}
/*
* We always prefer memory mapped access.
*/
if (maddr == NULL) {
error = ahc_linux_pci_reserve_io_region(ahc, &base);
if (error == 0) {
ahc->tag = BUS_SPACE_PIO;
ahc->bsh.ioport = base;
command |= PCIM_CMD_PORTEN;
} else {
printf("aic7xxx: PCI%d:%d:%d IO region 0x%lx[0..255] "
"unavailable. Cannot map device.\n",
ahc_get_pci_bus(ahc->dev_softc),
ahc_get_pci_slot(ahc->dev_softc),
ahc_get_pci_function(ahc->dev_softc),
base);
}
}
ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4);
return (error);
}
