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freebsd-skq/sys/powerpc/powermac/ata_kauai.c
nwhitehorn f81b969763 Bring Kauai ATA driver in line with Macio ATA by reading the PIO config reg 
to set the initial PIO mode instead of assuming PIO4. There are still a few
nagging issues:

- There are some problems with 64 K DMA transfers waiting on lower level
changes.

- ATAPI DMA is broken on Marcel's Mac Mini because we need an ATA SELECT hook
propagated up to individual drivers for hardware without timing registers for
each ATA channel.
2008-10-27 00:09:14 +00:00

375 lines
9.8 KiB
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/*-
* Copyright 2004 by Peter Grehan. All rights reserved.
*
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 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.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* Mac 'Kauai' PCI ATA controller
*/
#include "opt_ata.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/malloc.h>
#include <sys/sema.h>
#include <sys/taskqueue.h>
#include <vm/uma.h>
#include <machine/stdarg.h>
#include <machine/resource.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <sys/ata.h>
#include <dev/ata/ata-all.h>
#include <ata_if.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <machine/intr_machdep.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include "ata_dbdma.h"
#define ATA_KAUAI_REGOFFSET 0x2000
#define ATA_KAUAI_DBDMAOFFSET 0x1000
/*
* Offset to alt-control register from base
*/
#define ATA_KAUAI_ALTOFFSET (ATA_KAUAI_REGOFFSET + 0x160)
/*
* Define the gap between registers
*/
#define ATA_KAUAI_REGGAP 16
/*
* PIO and DMA access registers
*/
#define PIO_CONFIG_REG (ATA_KAUAI_REGOFFSET + 0x200)
#define UDMA_CONFIG_REG (ATA_KAUAI_REGOFFSET + 0x210)
#define DMA_IRQ_REG (ATA_KAUAI_REGOFFSET + 0x300)
#define USE_DBDMA_IRQ 0
/*
* Define the kauai pci bus attachment.
*/
static int ata_kauai_probe(device_t dev);
static int ata_kauai_attach(device_t dev);
static void ata_kauai_setmode(device_t parent, device_t dev);
static int ata_kauai_begin_transaction(struct ata_request *request);
static device_method_t ata_kauai_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ata_kauai_probe),
DEVMETHOD(device_attach, ata_kauai_attach),
DEVMETHOD(device_detach, bus_generic_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* ATA interface */
DEVMETHOD(ata_setmode, ata_kauai_setmode),
{ 0, 0 }
};
struct ata_kauai_softc {
struct ata_dbdma_channel sc_ch;
struct resource *sc_memr;
int shasta;
uint32_t udmaconf[2];
uint32_t wdmaconf[2];
uint32_t pioconf[2];
};
static driver_t ata_kauai_driver = {
"ata",
ata_kauai_methods,
sizeof(struct ata_kauai_softc),
};
DRIVER_MODULE(ata, pci, ata_kauai_driver, ata_devclass, 0, 0);
MODULE_DEPEND(ata, ata, 1, 1, 1);
/*
* PCI ID search table
*/
static struct kauai_pci_dev {
u_int32_t kpd_devid;
char *kpd_desc;
} kauai_pci_devlist[] = {
{ 0x0033106b, "Uninorth2 Kauai ATA Controller" },
{ 0x003b106b, "Intrepid Kauai ATA Controller" },
{ 0x0043106b, "K2 Kauai ATA Controller" },
{ 0x0050106b, "Shasta Kauai ATA Controller" },
{ 0x0069106b, "Intrepid-2 Kauai ATA Controller" },
{ 0, NULL }
};
/*
* IDE transfer timings
*/
#define KAUAI_PIO_MASK 0xff000fff
#define KAUAI_DMA_MASK 0x00fff000
#define KAUAI_UDMA_MASK 0x0000ffff
static const u_int pio_timing_kauai[] = {
0x08000a92, /* PIO0 */
0x0800060f, /* PIO1 */
0x0800038b, /* PIO2 */
0x05000249, /* PIO3 */
0x04000148 /* PIO4 */
};
static const u_int pio_timing_shasta[] = {
0x0a000c97, /* PIO0 */
0x07000712, /* PIO1 */
0x040003cd, /* PIO2 */
0x0400028b, /* PIO3 */
0x0400010a /* PIO4 */
};
static const u_int dma_timing_kauai[] = {
0x00618000, /* WDMA0 */
0x00209000, /* WDMA1 */
0x00148000 /* WDMA2 */
};
static const u_int dma_timing_shasta[] = {
0x00820800, /* WDMA0 */
0x0028b000, /* WDMA1 */
0x001ca000 /* WDMA2 */
};
static const u_int udma_timing_kauai[] = {
0x000070c1, /* UDMA0 */
0x00005d81, /* UDMA1 */
0x00004a61, /* UDMA2 */
0x00003a51, /* UDMA3 */
0x00002a31, /* UDMA4 */
0x00002921 /* UDMA5 */
};
static const u_int udma_timing_shasta[] = {
0x00035901, /* UDMA0 */
0x000348b1, /* UDMA1 */
0x00033881, /* UDMA2 */
0x00033861, /* UDMA3 */
0x00033841, /* UDMA4 */
0x00033031, /* UDMA5 */
0x00033021 /* UDMA6 */
};
static int
ata_kauai_probe(device_t dev)
{
struct ata_channel *ch;
struct ata_kauai_softc *sc;
u_int32_t devid;
phandle_t node;
const char *compatstring = NULL;
int i, found, rid;
found = 0;
devid = pci_get_devid(dev);
for (i = 0; kauai_pci_devlist[i].kpd_desc != NULL; i++) {
if (devid == kauai_pci_devlist[i].kpd_devid) {
found = 1;
device_set_desc(dev, kauai_pci_devlist[i].kpd_desc);
}
}
if (!found)
return (ENXIO);
node = ofw_bus_get_node(dev);
sc = device_get_softc(dev);
bzero(sc, sizeof(struct ata_kauai_softc));
ch = &sc->sc_ch.sc_ch;
compatstring = ofw_bus_get_compat(dev);
if (compatstring != NULL && strcmp(compatstring,"shasta-ata") == 0)
sc->shasta = 1;
/* Regular Kauai controllers apparently need this hack */
if (!sc->shasta)
bus_set_resource(dev, SYS_RES_IRQ, 0, 39, 1);
rid = PCIR_BARS;
sc->sc_memr = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (sc->sc_memr == NULL) {
device_printf(dev, "could not allocate memory\n");
return (ENXIO);
}
/*
* Set up the resource vectors
*/
for (i = ATA_DATA; i <= ATA_COMMAND; i++) {
ch->r_io[i].res = sc->sc_memr;
ch->r_io[i].offset = i*ATA_KAUAI_REGGAP + ATA_KAUAI_REGOFFSET;
}
ch->r_io[ATA_CONTROL].res = sc->sc_memr;
ch->r_io[ATA_CONTROL].offset = ATA_KAUAI_ALTOFFSET;
ata_default_registers(dev);
ch->unit = 0;
ch->flags |= ATA_USE_16BIT;
ata_generic_hw(dev);
return (ata_probe(dev));
}
#if USE_DBDMA_IRQ
static int
ata_kauai_dma_interrupt(struct ata_kauai_softc *sc)
{
/* Clear the DMA interrupt bits */
bus_write_4(sc->sc_memr, DMA_IRQ_REG, 0x80000000);
return ata_interrupt(sc);
}
#endif
static int
ata_kauai_attach(device_t dev)
{
struct ata_kauai_softc *sc = device_get_softc(dev);
#if USE_DBDMA_IRQ
int dbdma_irq_rid = 1;
struct resource *dbdma_irq;
void *cookie;
#endif
pci_enable_busmaster(dev);
/* Init DMA engine */
sc->sc_ch.dbdma_rid = 1;
sc->sc_ch.dbdma_regs = sc->sc_memr;
sc->sc_ch.dbdma_offset = ATA_KAUAI_DBDMAOFFSET;
ata_dbdma_dmainit(dev);
#if USE_DBDMA_IRQ
/* Bind to DBDMA interrupt as well */
if ((dbdma_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ,
&dbdma_irq_rid, RF_SHAREABLE | RF_ACTIVE)) != NULL) {
bus_setup_intr(dev, dbdma_irq, ATA_INTR_FLAGS, NULL,
(driver_intr_t *)ata_kauai_dma_interrupt, sc,&cookie);
}
#endif
/* Set up initial mode */
sc->pioconf[0] = sc->pioconf[1] =
bus_read_4(sc->sc_memr, PIO_CONFIG_REG) & 0x0f000fff;
sc->udmaconf[0] = sc->udmaconf[1] = 0;
sc->wdmaconf[0] = sc->wdmaconf[1] = 0;
/* Magic FCR value from Apple */
bus_write_4(sc->sc_memr, 0, 0x00000007);
/* Set begin_transaction */
sc->sc_ch.sc_ch.hw.begin_transaction = ata_kauai_begin_transaction;
return ata_attach(dev);
}
static void
ata_kauai_setmode(device_t parent, device_t dev)
{
struct ata_device *atadev = device_get_softc(dev);
struct ata_kauai_softc *sc = device_get_softc(parent);
uint32_t mode;
mode = ata_limit_mode(dev,atadev->mode,
(sc->shasta) ? ATA_UDMA6 : ATA_UDMA5);
if (ata_controlcmd(dev, ATA_SETFEATURES, ATA_SF_SETXFER, 0, mode))
return;
atadev->mode = mode;
if (sc->shasta) {
switch (mode & ATA_DMA_MASK) {
case ATA_UDMA0:
sc->udmaconf[atadev->unit]
= udma_timing_shasta[mode & ATA_MODE_MASK];
break;
case ATA_WDMA0:
sc->udmaconf[atadev->unit] = 0;
sc->wdmaconf[atadev->unit]
= dma_timing_shasta[mode & ATA_MODE_MASK];
break;
default:
sc->pioconf[atadev->unit]
= pio_timing_shasta[(mode & ATA_MODE_MASK) -
ATA_PIO0];
break;
}
} else {
switch (mode & ATA_DMA_MASK) {
case ATA_UDMA0:
sc->udmaconf[atadev->unit]
= udma_timing_kauai[mode & ATA_MODE_MASK];
break;
case ATA_WDMA0:
sc->udmaconf[atadev->unit] = 0;
sc->wdmaconf[atadev->unit]
= dma_timing_kauai[mode & ATA_MODE_MASK];
break;
default:
sc->pioconf[atadev->unit]
= pio_timing_kauai[(mode & ATA_MODE_MASK)
- ATA_PIO0];
break;
}
}
}
static int
ata_kauai_begin_transaction(struct ata_request *request)
{
struct ata_device *atadev = device_get_softc(request->dev);
struct ata_kauai_softc *sc = device_get_softc(request->parent);
bus_write_4(sc->sc_memr, UDMA_CONFIG_REG, sc->udmaconf[atadev->unit]);
bus_write_4(sc->sc_memr, PIO_CONFIG_REG,
sc->wdmaconf[atadev->unit] | sc->pioconf[atadev->unit]);
return ata_begin_transaction(request);
}
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