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| Current File : //usr/src/sys/powerpc/powermac/ata_macio.c |
/*-
* Copyright 2002 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.
*
* $FreeBSD: release/9.1.0/sys/powerpc/powermac/ata_macio.c 200171 2009-12-06 00:10:13Z mav $
*/
/*
* Mac-io 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/ofw_bus.h>
#include "ata_dbdma.h"
/*
* Offset to control registers from base
*/
#define ATA_MACIO_ALTOFFSET 0x160
/*
* Define the gap between registers
*/
#define ATA_MACIO_REGGAP 16
/*
* Whether or not to bind to the DBDMA IRQ
*/
#define USE_DBDMA_IRQ 0
/*
* Timing register
*/
#define ATA_MACIO_TIMINGREG 0x200
#define ATA_TIME_TO_TICK(rev,time) howmany(time, (rev == 4) ? 15 : 30)
#define PIO_REC_OFFSET 4
#define PIO_REC_MIN 1
#define PIO_ACT_MIN 1
#define DMA_REC_OFFSET 1
#define DMA_REC_MIN 1
#define DMA_ACT_MIN 1
struct ide_timings {
int cycle; /* minimum cycle time [ns] */
int active; /* minimum command active time [ns] */
};
struct ide_timings pio_timings[5] = {
{ 600, 180 }, /* PIO 0 */
{ 390, 150 }, /* PIO 1 */
{ 240, 105 }, /* PIO 2 */
{ 180, 90 }, /* PIO 3 */
{ 120, 75 } /* PIO 4 */
};
static const struct ide_timings dma_timings[3] = {
{ 480, 240 }, /* WDMA 0 */
{ 165, 90 }, /* WDMA 1 */
{ 120, 75 } /* WDMA 2 */
};
static const struct ide_timings udma_timings[5] = {
{ 120, 180 }, /* UDMA 0 */
{ 90, 150 }, /* UDMA 1 */
{ 60, 120 }, /* UDMA 2 */
{ 45, 90 }, /* UDMA 3 */
{ 30, 90 } /* UDMA 4 */
};
/*
* Define the macio ata bus attachment.
*/
static int ata_macio_probe(device_t dev);
static int ata_macio_setmode(device_t dev, int target, int mode);
static int ata_macio_attach(device_t dev);
static int ata_macio_begin_transaction(struct ata_request *request);
static device_method_t ata_macio_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ata_macio_probe),
DEVMETHOD(device_attach, ata_macio_attach),
/* ATA interface */
DEVMETHOD(ata_setmode, ata_macio_setmode),
{ 0, 0 }
};
struct ata_macio_softc {
struct ata_dbdma_channel sc_ch;
int rev;
int max_mode;
struct resource *sc_mem;
uint32_t udmaconf[2];
uint32_t wdmaconf[2];
uint32_t pioconf[2];
};
static driver_t ata_macio_driver = {
"ata",
ata_macio_methods,
sizeof(struct ata_macio_softc),
};
DRIVER_MODULE(ata, macio, ata_macio_driver, ata_devclass, 0, 0);
MODULE_DEPEND(ata, ata, 1, 1, 1);
static int
ata_macio_probe(device_t dev)
{
const char *type = ofw_bus_get_type(dev);
const char *name = ofw_bus_get_name(dev);
struct ata_macio_softc *sc;
struct ata_channel *ch;
int rid, i;
if (strcmp(type, "ata") != 0 &&
strcmp(type, "ide") != 0)
return (ENXIO);
sc = device_get_softc(dev);
bzero(sc, sizeof(struct ata_macio_softc));
ch = &sc->sc_ch.sc_ch;
if (strcmp(name,"ata-4") == 0) {
device_set_desc(dev,"Apple MacIO Ultra ATA Controller");
sc->rev = 4;
sc->max_mode = ATA_UDMA4;
} else {
device_set_desc(dev,"Apple MacIO ATA Controller");
sc->rev = 3;
sc->max_mode = ATA_WDMA2;
}
rid = 0;
sc->sc_mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
RF_ACTIVE);
if (sc->sc_mem == 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_mem;
ch->r_io[i].offset = i * ATA_MACIO_REGGAP;
}
ch->r_io[ATA_CONTROL].res = sc->sc_mem;
ch->r_io[ATA_CONTROL].offset = ATA_MACIO_ALTOFFSET;
ata_default_registers(dev);
ch->unit = 0;
ch->flags |= ATA_USE_16BIT | ATA_NO_ATAPI_DMA;
ata_generic_hw(dev);
return (ata_probe(dev));
}
static int
ata_macio_attach(device_t dev)
{
struct ata_macio_softc *sc = device_get_softc(dev);
uint32_t timingreg;
#if USE_DBDMA_IRQ
int dbdma_irq_rid = 1;
struct resource *dbdma_irq;
void *cookie;
#endif
/* Init DMA engine */
sc->sc_ch.dbdma_rid = 1;
sc->sc_ch.dbdma_regs = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&sc->sc_ch.dbdma_rid, RF_ACTIVE);
ata_dbdma_dmainit(dev);
/* Configure initial timings */
timingreg = bus_read_4(sc->sc_mem, ATA_MACIO_TIMINGREG);
if (sc->rev == 4) {
sc->udmaconf[0] = sc->udmaconf[1] = timingreg & 0x1ff00000;
sc->wdmaconf[0] = sc->wdmaconf[1] = timingreg & 0x001ffc00;
sc->pioconf[0] = sc->pioconf[1] = timingreg & 0x000003ff;
} else {
sc->udmaconf[0] = sc->udmaconf[1] = 0;
sc->wdmaconf[0] = sc->wdmaconf[1] = timingreg & 0xfffff800;
sc->pioconf[0] = sc->pioconf[1] = timingreg & 0x000007ff;
}
#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_interrupt, sc,&cookie);
}
#endif
/* Set begin_transaction */
sc->sc_ch.sc_ch.hw.begin_transaction = ata_macio_begin_transaction;
return ata_attach(dev);
}
static int
ata_macio_setmode(device_t dev, int target, int mode)
{
struct ata_macio_softc *sc = device_get_softc(dev);
int min_cycle = 0, min_active = 0;
int cycle_tick = 0, act_tick = 0, inact_tick = 0, half_tick;
mode = min(mode, sc->max_mode);
if ((mode & ATA_DMA_MASK) == ATA_UDMA0) {
min_cycle = udma_timings[mode & ATA_MODE_MASK].cycle;
min_active = udma_timings[mode & ATA_MODE_MASK].active;
cycle_tick = ATA_TIME_TO_TICK(sc->rev,min_cycle);
act_tick = ATA_TIME_TO_TICK(sc->rev,min_active);
/* mask: 0x1ff00000 */
sc->udmaconf[target] =
(cycle_tick << 21) | (act_tick << 25) | 0x100000;
} else if ((mode & ATA_DMA_MASK) == ATA_WDMA0) {
min_cycle = dma_timings[mode & ATA_MODE_MASK].cycle;
min_active = dma_timings[mode & ATA_MODE_MASK].active;
cycle_tick = ATA_TIME_TO_TICK(sc->rev,min_cycle);
act_tick = ATA_TIME_TO_TICK(sc->rev,min_active);
if (sc->rev == 4) {
inact_tick = cycle_tick - act_tick;
/* mask: 0x001ffc00 */
sc->wdmaconf[target] =
(act_tick << 10) | (inact_tick << 15);
} else {
inact_tick = cycle_tick - act_tick - DMA_REC_OFFSET;
if (inact_tick < DMA_REC_MIN)
inact_tick = DMA_REC_MIN;
half_tick = 0; /* XXX */
/* mask: 0xfffff800 */
sc->wdmaconf[target] = (half_tick << 21)
| (inact_tick << 16) | (act_tick << 11);
}
} else {
min_cycle =
pio_timings[(mode & ATA_MODE_MASK) - ATA_PIO0].cycle;
min_active =
pio_timings[(mode & ATA_MODE_MASK) - ATA_PIO0].active;
cycle_tick = ATA_TIME_TO_TICK(sc->rev,min_cycle);
act_tick = ATA_TIME_TO_TICK(sc->rev,min_active);
if (sc->rev == 4) {
inact_tick = cycle_tick - act_tick;
/* mask: 0x000003ff */
sc->pioconf[target] =
(inact_tick << 5) | act_tick;
} else {
if (act_tick < PIO_ACT_MIN)
act_tick = PIO_ACT_MIN;
inact_tick = cycle_tick - act_tick - PIO_REC_OFFSET;
if (inact_tick < PIO_REC_MIN)
inact_tick = PIO_REC_MIN;
/* mask: 0x000007ff */
sc->pioconf[target] =
(inact_tick << 5) | act_tick;
}
}
return (mode);
}
static int
ata_macio_begin_transaction(struct ata_request *request)
{
struct ata_macio_softc *sc = device_get_softc(request->parent);
bus_write_4(sc->sc_mem, ATA_MACIO_TIMINGREG,
sc->udmaconf[request->unit] | sc->wdmaconf[request->unit]
| sc->pioconf[request->unit]);
return ata_begin_transaction(request);
}