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NetBSD/sys/dev/pci/geodeide.c

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/* $NetBSD: geodeide.c,v 1.25 2013/10/07 19:51:55 jakllsch Exp $ */
/*
* Copyright (c) 2004 Manuel Bouyer.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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.
*
*/
/*
* Driver for the IDE part of the AMD Geode CS5530A companion chip
* and AMD Geode SC1100.
* Docs available from AMD's web site
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: geodeide.c,v 1.25 2013/10/07 19:51:55 jakllsch Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcidevs.h>
#include <dev/pci/pciidereg.h>
#include <dev/pci/pciidevar.h>
#include <dev/pci/pciide_geode_reg.h>
static void geodeide_chip_map(struct pciide_softc *,
const struct pci_attach_args *);
static void geodeide_setup_channel(struct ata_channel *);
static int geodeide_dma_init(void *, int, int, void *, size_t, int);
static int geodeide_match(device_t, cfdata_t, void *);
static void geodeide_attach(device_t, device_t, void *);
CFATTACH_DECL_NEW(geodeide, sizeof(struct pciide_softc),
geodeide_match, geodeide_attach, pciide_detach, NULL);
static const struct pciide_product_desc pciide_geode_products[] = {
{ PCI_PRODUCT_CYRIX_CX5530_IDE,
0,
"AMD Geode CX5530 IDE controller",
geodeide_chip_map,
},
{ PCI_PRODUCT_NS_SC1100_IDE,
0,
"AMD Geode SC1100 IDE controller",
geodeide_chip_map,
},
{ 0,
0,
NULL,
NULL,
},
};
static int
geodeide_match(device_t parent, cfdata_t match, void *aux)
{
struct pci_attach_args *pa = aux;
if ((PCI_VENDOR(pa->pa_id) == PCI_VENDOR_CYRIX ||
PCI_VENDOR(pa->pa_id) == PCI_VENDOR_NS) &&
PCI_CLASS(pa->pa_class) == PCI_CLASS_MASS_STORAGE &&
PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_MASS_STORAGE_IDE &&
pciide_lookup_product(pa->pa_id, pciide_geode_products))
return(2);
return (0);
}
static void
geodeide_attach(device_t parent, device_t self, void *aux)
{
struct pci_attach_args *pa = aux;
struct pciide_softc *sc = device_private(self);
sc->sc_wdcdev.sc_atac.atac_dev = self;
pciide_common_attach(sc, pa,
pciide_lookup_product(pa->pa_id, pciide_geode_products));
}
static void
geodeide_chip_map(struct pciide_softc *sc, const struct pci_attach_args *pa)
{
struct pciide_channel *cp;
int channel;
if (pciide_chipen(sc, pa) == 0)
return;
aprint_verbose_dev(sc->sc_wdcdev.sc_atac.atac_dev,
"bus-master DMA support present");
pciide_mapreg_dma(sc, pa);
aprint_verbose("\n");
if (sc->sc_dma_ok) {
sc->sc_wdcdev.sc_atac.atac_cap = ATAC_CAP_DMA | ATAC_CAP_UDMA;
sc->sc_wdcdev.irqack = pciide_irqack;
/*
* XXXJRT What chip revisions actually need the DMA
* alignment work-around?
*/
sc->sc_wdcdev.dma_init = geodeide_dma_init;
}
sc->sc_wdcdev.sc_atac.atac_pio_cap = 4;
sc->sc_wdcdev.sc_atac.atac_dma_cap = 2;
sc->sc_wdcdev.sc_atac.atac_udma_cap = 2;
/*
* The 5530 is utterly swamped by UDMA mode 2, so limit to mode 1
* so that the chip is able to perform the other functions it has
* while IDE UDMA is going on.
*/
if (sc->sc_pp->ide_product == PCI_PRODUCT_CYRIX_CX5530_IDE) {
sc->sc_wdcdev.sc_atac.atac_udma_cap = 1;
}
sc->sc_wdcdev.sc_atac.atac_set_modes = geodeide_setup_channel;
sc->sc_wdcdev.sc_atac.atac_channels = sc->wdc_chanarray;
sc->sc_wdcdev.sc_atac.atac_nchannels = PCIIDE_NUM_CHANNELS;
sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DATA16 | ATAC_CAP_DATA32;
sc->sc_wdcdev.wdc_maxdrives = 2;
/*
* Soekris Engineering Issue #0003:
* "The SC1100 built in busmaster IDE controller is pretty
* standard, but have two bugs: data transfers need to be
* dword aligned and it cannot do an exact 64Kbyte data
* transfer."
*/
if (sc->sc_pp->ide_product == PCI_PRODUCT_NS_SC1100_IDE) {
if (sc->sc_dma_boundary == 0x10000)
sc->sc_dma_boundary -= PAGE_SIZE;
if (sc->sc_dma_maxsegsz == 0x10000)
sc->sc_dma_maxsegsz -= PAGE_SIZE;
}
wdc_allocate_regs(&sc->sc_wdcdev);
for (channel = 0; channel < sc->sc_wdcdev.sc_atac.atac_nchannels;
channel++) {
cp = &sc->pciide_channels[channel];
/* controller is compat-only */
if (pciide_chansetup(sc, channel, 0) == 0)
continue;
pciide_mapchan(pa, cp, 0, pciide_pci_intr);
}
}
static void
geodeide_setup_channel(struct ata_channel *chp)
{
struct ata_drive_datas *drvp;
struct pciide_channel *cp = CHAN_TO_PCHAN(chp);
struct pciide_softc *sc = CHAN_TO_PCIIDE(chp);
int channel = chp->ch_channel;
int drive, s;
u_int32_t dma_timing;
u_int8_t idedma_ctl;
const int32_t *geode_pio;
const int32_t *geode_dma;
const int32_t *geode_udma;
bus_size_t dmaoff, piooff;
switch (sc->sc_pp->ide_product) {
case PCI_PRODUCT_CYRIX_CX5530_IDE:
geode_pio = geode_cs5530_pio;
geode_dma = geode_cs5530_dma;
geode_udma = geode_cs5530_udma;
break;
case PCI_PRODUCT_NS_SC1100_IDE:
default: /* XXX gcc */
geode_pio = geode_sc1100_pio;
geode_dma = geode_sc1100_dma;
geode_udma = geode_sc1100_udma;
break;
}
/* setup DMA if needed */
pciide_channel_dma_setup(cp);
idedma_ctl = 0;
/* Per drive settings */
for (drive = 0; drive < 2; drive++) {
drvp = &chp->ch_drive[drive];
/* If no drive, skip */
if (drvp->drive_type == ATA_DRIVET_NONE)
continue;
switch (sc->sc_pp->ide_product) {
case PCI_PRODUCT_CYRIX_CX5530_IDE:
dmaoff = CS5530_DMA_REG(channel, drive);
piooff = CS5530_PIO_REG(channel, drive);
dma_timing = CS5530_DMA_REG_PIO_FORMAT;
break;
case PCI_PRODUCT_NS_SC1100_IDE:
default: /* XXX gcc */
dmaoff = SC1100_DMA_REG(channel, drive);
piooff = SC1100_PIO_REG(channel, drive);
dma_timing = 0;
break;
}
/* add timing values, setup DMA if needed */
if (drvp->drive_flags & ATA_DRIVE_UDMA) {
/* Use Ultra-DMA */
dma_timing |= geode_udma[drvp->UDMA_mode];
idedma_ctl |= IDEDMA_CTL_DRV_DMA(drive);
} else if (drvp->drive_flags & ATA_DRIVE_DMA) {
/* use Multiword DMA */
dma_timing |= geode_dma[drvp->DMA_mode];
idedma_ctl |= IDEDMA_CTL_DRV_DMA(drive);
} else {
/* PIO only */
s = splbio();
drvp->drive_flags &= ~(ATA_DRIVE_UDMA | ATA_DRIVE_DMA);
splx(s);
}
switch (sc->sc_pp->ide_product) {
case PCI_PRODUCT_CYRIX_CX5530_IDE:
bus_space_write_4(sc->sc_dma_iot, sc->sc_dma_ioh,
dmaoff, dma_timing);
bus_space_write_4(sc->sc_dma_iot, sc->sc_dma_ioh,
piooff, geode_pio[drvp->PIO_mode]);
break;
case PCI_PRODUCT_NS_SC1100_IDE:
pci_conf_write(sc->sc_pc, sc->sc_tag, dmaoff,
dma_timing);
pci_conf_write(sc->sc_pc, sc->sc_tag, piooff,
geode_pio[drvp->PIO_mode]);
break;
}
}
if (idedma_ctl != 0) {
/* Add software bits in status register */
bus_space_write_1(sc->sc_dma_iot, cp->dma_iohs[IDEDMA_CTL], 0,
idedma_ctl);
}
}
static int
geodeide_dma_init(void *v, int channel, int drive, void *databuf,
size_t datalen, int flags)
{
/*
* If the buffer is not properly aligned, we can't allow DMA
* and need to fall back to PIO.
*/
if (((uintptr_t)databuf) & 0xf)
return (EINVAL);
return (pciide_dma_init(v, channel, drive, databuf, datalen, flags));
}
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