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NetBSD/sys/arch/arm/xscale/i80312.c

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/* $NetBSD: i80312.c,v 1.13 2003/01/01 00:46:15 thorpej Exp $ */
/*
* Copyright (c) 2001, 2002 Wasabi Systems, Inc.
* All rights reserved.
*
* Written by Jason R. Thorpe for Wasabi Systems, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed for the NetBSD Project by
* Wasabi Systems, Inc.
* 4. The name of Wasabi Systems, Inc. may not be used to endorse
* or promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Autoconfiguration support for the Intel i80312 Companion I/O chip.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#define _ARM32_BUS_DMA_PRIVATE
#include <machine/bus.h>
#include <arm/xscale/i80312reg.h>
#include <arm/xscale/i80312var.h>
#include <dev/pci/ppbreg.h>
/*
* Statically-allocated bus_space stucture used to access the
* i80312's own registers.
*/
struct bus_space i80312_bs_tag;
/*
* There can be only one i80312, so we keep a global pointer to
* the softc, so board-specific code can use features of the
* i80312 without having to have a handle on the softc itself.
*/
struct i80312_softc *i80312_softc;
static void i80312_pci_dma_init(struct i80312_softc *);
static int i80312_pcibus_print(void *, const char *);
/*
* i80312_attach:
*
* Board-independent attach routine for the i80312.
*/
void
i80312_attach(struct i80312_softc *sc)
{
struct pcibus_attach_args pba;
uint32_t atucr;
pcireg_t preg;
i80312_softc = sc;
/*
* Slice off some useful subregion handles.
*/
if (bus_space_subregion(sc->sc_st, sc->sc_sh, I80312_PPB_BASE,
I80312_PPB_SIZE, &sc->sc_ppb_sh))
panic("%s: unable to subregion PPB registers",
sc->sc_dev.dv_xname);
if (bus_space_subregion(sc->sc_st, sc->sc_sh, I80312_ATU_BASE,
I80312_ATU_SIZE, &sc->sc_atu_sh))
panic("%s: unable to subregion ATU registers",
sc->sc_dev.dv_xname);
if (bus_space_subregion(sc->sc_st, sc->sc_sh, I80312_INTC_BASE,
I80312_INTC_SIZE, &sc->sc_intc_sh))
panic("%s: unable to subregion INTC registers",
sc->sc_dev.dv_xname);
/* We expect the Memory Controller to be already sliced off. */
/*
* Disable the private space decode.
*/
sc->sc_sder = bus_space_read_1(sc->sc_st, sc->sc_ppb_sh,
I80312_PPB_SDER);
sc->sc_sder &= ~PPB_SDER_PMSE;
bus_space_write_1(sc->sc_st, sc->sc_ppb_sh,
I80312_PPB_SDER, sc->sc_sder);
/*
* Program the Secondary ID Select register.
*/
bus_space_write_2(sc->sc_st, sc->sc_ppb_sh,
I80312_PPB_SISR, sc->sc_sisr);
/*
* Program the private secondary bus spaces.
*/
if (sc->sc_privmem_size && sc->sc_privio_size) {
bus_space_write_1(sc->sc_st, sc->sc_ppb_sh, I80312_PPB_SIOBR,
(sc->sc_privio_base >> 12) << 4);
bus_space_write_1(sc->sc_st, sc->sc_ppb_sh, I80312_PPB_SIOLR,
((sc->sc_privio_base + sc->sc_privio_size - 1)
>> 12) << 4);
bus_space_write_2(sc->sc_st, sc->sc_ppb_sh, I80312_PPB_SMBR,
(sc->sc_privmem_base >> 20) << 4);
bus_space_write_2(sc->sc_st, sc->sc_ppb_sh, I80312_PPB_SMLR,
((sc->sc_privmem_base + sc->sc_privmem_size - 1)
>> 20) << 4);
sc->sc_sder |= PPB_SDER_PMSE;
bus_space_write_1(sc->sc_st, sc->sc_ppb_sh, I80312_PPB_SDER,
sc->sc_sder);
} else if (sc->sc_privmem_size || sc->sc_privio_size) {
printf("%s: WARNING: privmem_size 0x%08x privio_size 0x%08x\n",
sc->sc_dev.dv_xname, sc->sc_privmem_size,
sc->sc_privio_size);
printf("%s: private bus spaces not enabled\n",
sc->sc_dev.dv_xname);
}
/*
* Program the Primary Inbound window.
*/
if (sc->sc_is_host)
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
PCI_MAPREG_START, sc->sc_pin_base);
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
I80312_ATU_PIAL, ATU_LIMIT(sc->sc_pin_size));
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
I80312_ATU_PIATV, sc->sc_pin_xlate);
/*
* Program the Secondary Inbound window.
*/
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
I80312_ATU_SIAM, sc->sc_sin_base);
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
I80312_ATU_SIAL, ATU_LIMIT(sc->sc_sin_size));
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
I80312_ATU_SIATV, sc->sc_sin_xlate);
/*
* Mask (disable) the ATU interrupt sources.
* XXX May want to revisit this if we encounter
* XXX an application that wants it.
*/
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
I80312_ATU_PAIM,
ATU_AIM_MPEIM | ATU_AIM_TATIM | ATU_AIM_TAMIM |
ATU_AIM_MAIM | ATU_AIM_SAIM | ATU_AIM_DPEIM |
ATU_AIM_PSTIM);
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
I80312_ATU_SAIM,
ATU_AIM_MPEIM | ATU_AIM_TATIM | ATU_AIM_TAMIM |
ATU_AIM_MAIM | ATU_AIM_SAIM | ATU_AIM_DPEIM);
/*
* Clear:
*
* Primary Outbound ATU Enable
* Secondary Outbound ATU Enable
* Secondary Direct Addressing Select
* Direct Addressing Enable
*/
atucr = bus_space_read_4(sc->sc_st, sc->sc_atu_sh, I80312_ATU_ACR);
atucr &= ~(ATU_ACR_POAE|ATU_ACR_SOAE|ATU_ACR_SDAS|ATU_ACR_DAE);
/*
* Program the Primary Outbound windows.
*/
if (sc->sc_pmemout_size)
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
I80312_ATU_POMWV, sc->sc_pmemout_base);
if (sc->sc_pioout_size)
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
I80312_ATU_POIOWV, sc->sc_pioout_base);
if (sc->sc_pmemout_size || sc->sc_pioout_size)
atucr |= ATU_ACR_POAE;
/*
* Program the Secondary Outbound windows.
*/
if (sc->sc_smemout_size)
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
I80312_ATU_SOMWV, sc->sc_smemout_base);
if (sc->sc_sioout_size)
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
I80312_ATU_SOIOWV, sc->sc_sioout_base);
if (sc->sc_smemout_size || sc->sc_sioout_size)
atucr |= ATU_ACR_SOAE;
bus_space_write_4(sc->sc_st, sc->sc_atu_sh, I80312_ATU_ACR, atucr);
/*
* Enable bus mastering, memory access, SERR, and parity
* checking on the ATU.
*/
if (sc->sc_is_host) {
preg = bus_space_read_4(sc->sc_st, sc->sc_atu_sh,
PCI_COMMAND_STATUS_REG);
preg |= PCI_COMMAND_MEM_ENABLE | PCI_COMMAND_MASTER_ENABLE |
PCI_COMMAND_PARITY_ENABLE | PCI_COMMAND_SERR_ENABLE;
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
PCI_COMMAND_STATUS_REG, preg);
}
preg = bus_space_read_4(sc->sc_st, sc->sc_atu_sh,
I80312_ATU_SACS);
preg |= PCI_COMMAND_MEM_ENABLE | PCI_COMMAND_MASTER_ENABLE |
PCI_COMMAND_PARITY_ENABLE | PCI_COMMAND_SERR_ENABLE;
bus_space_write_4(sc->sc_st, sc->sc_atu_sh,
I80312_ATU_SACS, preg);
/*
* Configure the bridge. If we're a host, set the primary
* bus to bus #0 and the secondary bus to bus #1. We also
* set the PPB's subordinate bus # to 1. It will be fixed
* up later when we fully configure the bus.
*
* If we're a slave, just use the bus #'s that the host
* provides.
*/
if (sc->sc_is_host) {
bus_space_write_4(sc->sc_st, sc->sc_ppb_sh,
PPB_REG_BUSINFO,
(0 << PCI_BRIDGE_BUS_PRIMARY_SHIFT) |
(1 << PCI_BRIDGE_BUS_SECONDARY_SHIFT) |
(1 << PCI_BRIDGE_BUS_SUBORDINATE_SHIFT));
}
/* Initialize the bus space tags. */
i80312_io_bs_init(&sc->sc_pci_iot, sc);
i80312_mem_bs_init(&sc->sc_pci_memt, sc);
/* Initialize the PCI chipset tag. */
i80312_pci_init(&sc->sc_pci_chipset, sc);
/* Initialize the DMA tags. */
i80312_pci_dma_init(sc);
/*
* Attach the PCI bus.
*
* Note: We only probe the Secondary PCI bus, since that
* is the only bus on which we can have a private device
* space.
*/
preg = bus_space_read_4(sc->sc_st, sc->sc_ppb_sh, PPB_REG_BUSINFO);
pba.pba_busname = "pci";
pba.pba_iot = &sc->sc_pci_iot;
pba.pba_memt = &sc->sc_pci_memt;
pba.pba_dmat = &sc->sc_pci_dmat;
pba.pba_pc = &sc->sc_pci_chipset;
pba.pba_bus = PPB_BUSINFO_SECONDARY(preg);
pba.pba_bridgetag = NULL;
pba.pba_intrswiz = 3;
pba.pba_intrtag = 0;
/* XXX MRL/MRM/MWI seem to have problems, at the moment. */
pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED /* |
PCI_FLAGS_MRL_OKAY | PCI_FLAGS_MRM_OKAY | PCI_FLAGS_MWI_OKAY */;
(void) config_found(&sc->sc_dev, &pba, i80312_pcibus_print);
}
/*
* i80312_pcibus_print:
*
* Autoconfiguration cfprint routine when attaching
* to the "pcibus" attribute.
*/
static int
i80312_pcibus_print(void *aux, const char *pnp)
{
struct pcibus_attach_args *pba = aux;
if (pnp)
aprint_normal("%s at %s", pba->pba_busname, pnp);
aprint_normal(" bus %d", pba->pba_bus);
return (UNCONF);
}
/*
* i80312_pci_dma_init:
*
* Initialize the PCI DMA tag.
*/
static void
i80312_pci_dma_init(struct i80312_softc *sc)
{
bus_dma_tag_t dmat = &sc->sc_pci_dmat;
struct arm32_dma_range *dr = &sc->sc_pci_dma_range;
dr->dr_sysbase = sc->sc_sin_xlate;
dr->dr_busbase = sc->sc_sin_base;
dr->dr_len = sc->sc_sin_size;
dmat->_ranges = dr;
dmat->_nranges = 1;
dmat->_dmamap_create = _bus_dmamap_create;
dmat->_dmamap_destroy = _bus_dmamap_destroy;
dmat->_dmamap_load = _bus_dmamap_load;
dmat->_dmamap_load_mbuf = _bus_dmamap_load_mbuf;
dmat->_dmamap_load_uio = _bus_dmamap_load_uio;
dmat->_dmamap_load_raw = _bus_dmamap_load_raw;
dmat->_dmamap_unload = _bus_dmamap_unload;
dmat->_dmamap_sync_pre = _bus_dmamap_sync;
dmat->_dmamap_sync_post = NULL;
dmat->_dmamem_alloc = _bus_dmamem_alloc;
dmat->_dmamem_free = _bus_dmamem_free;
dmat->_dmamem_map = _bus_dmamem_map;
dmat->_dmamem_unmap = _bus_dmamem_unmap;
dmat->_dmamem_mmap = _bus_dmamem_mmap;
}
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