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freebsd-dev/sys/powerpc/powermac/ata_kauai.c
Nathan Whitehorn e865720075 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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