282 lines
7.6 KiB
C
282 lines
7.6 KiB
C
/*-
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* Copyright (c) 2008 Deglitch Networks, Stanislav Sedov
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Driver for the AT91RM9200 CompactFlash controller operating in a
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* common memory mode. Interrupts are driven by polling. The driver
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* implements an ATA bridge and attached ATA channel driver on top
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* of it.
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* NOTE WELL: this driver uses polling mode. To achive an acceptable
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* operating speed you will probably want to use HZ=2000 in kernel
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* config.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/time.h>
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#include <sys/bus.h>
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#include <sys/resource.h>
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#include <sys/rman.h>
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#include <sys/sema.h>
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#include <sys/taskqueue.h>
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#include <vm/uma.h>
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#include <machine/bus.h>
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#include <machine/cpu.h>
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#include <machine/cpufunc.h>
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#include <machine/resource.h>
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#include <machine/intr.h>
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#include <sys/ata.h>
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#include <dev/ata/ata-all.h>
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#include <ata_if.h>
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struct at91_cfata_softc {
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device_t dev;
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struct resource *mem_res;
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struct resource irq;
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void (*isr_cb)(void *);
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void *isr_arg;
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struct callout tick;
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};
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static int at91_cfata_detach(device_t dev);
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static void at91_cfata_callout(void *arg);
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static int
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at91_cfata_probe(device_t dev)
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{
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device_set_desc_copy(dev, "AT91RM9200 CompactFlash controller");
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return (0);
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}
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static int
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at91_cfata_attach(device_t dev)
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{
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struct at91_cfata_softc *sc;
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int rid, error;
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sc = device_get_softc(dev);
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sc->dev = dev;
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rid = 0;
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error = 0;
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sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
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RF_ACTIVE);
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if (sc->mem_res == NULL)
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return (ENOMEM);
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/* XXX: init CF controller? */
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callout_init(&sc->tick, 1); /* Callout to poll the device. */
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device_add_child(dev, "ata", devclass_find_free_unit(ata_devclass, 0));
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bus_generic_attach(dev);
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return (0);
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}
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static int
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at91_cfata_detach(device_t dev)
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{
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struct at91_cfata_softc *sc;
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sc = device_get_softc(dev);
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bus_generic_detach(sc->dev);
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if (sc->mem_res != NULL) {
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bus_release_resource(dev, SYS_RES_MEMORY,
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rman_get_rid(sc->mem_res), sc->mem_res);
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sc->mem_res = NULL;
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}
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return (0);
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}
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static struct resource *
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ata_at91_alloc_resource(device_t dev, device_t child, int type, int *rid,
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u_long start, u_long end, u_long count, u_int flags)
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{
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struct at91_cfata_softc *sc = device_get_softc(dev);
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KASSERT(type == SYS_RES_IRQ && *rid == ATA_IRQ_RID,
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("[at91_cfata, %d]: illegal resource request (type %u rid %u)",
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__LINE__, type, *rid));
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return (&sc->irq);
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}
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static int
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ata_at91_release_resource(device_t dev, device_t child, int type, int rid,
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struct resource *r)
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{
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KASSERT(type == SYS_RES_IRQ && *rid == ATA_IRQ_RID,
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("[at91_cfata, %d]: illegal resource request (type %u rid %u)",
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__LINE__, type, *rid));
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return (0);
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}
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static int
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ata_at91_setup_intr(device_t dev, device_t child, struct resource *irq,
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int flags, driver_filter_t *filt,
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driver_intr_t *function, void *argument, void **cookiep)
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{
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struct at91_cfata_softc *sc = device_get_softc(dev);
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KASSERT(sc->isr_cb == NULL,
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("[at91_cfata, %d]: overwriting the old handler", __LINE__));
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sc->isr_cb = function;
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sc->isr_arg = argument;
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*cookiep = sc;
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callout_reset(&sc->tick, 1, at91_cfata_callout, sc);
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return (0);
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}
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static int
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ata_at91_teardown_intr(device_t dev, device_t child, struct resource *irq,
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void *cookie)
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{
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struct at91_cfata_softc *sc = device_get_softc(dev);
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sc->isr_cb = NULL;
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sc->isr_arg = NULL;
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return (0);
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}
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static void
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at91_cfata_callout(void *arg)
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{
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struct at91_cfata_softc *sc;
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sc = (struct at91_cfata_softc *)arg;
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if (sc->isr_cb != NULL)
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sc->isr_cb(sc->isr_arg);
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callout_reset(&sc->tick, 1, at91_cfata_callout, sc);
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}
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static int
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at91_channel_probe(device_t dev)
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{
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struct ata_channel *ch = device_get_softc(dev);
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ch->unit = 0;
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ch->flags |= ATA_USE_16BIT | ATA_NO_SLAVE;
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device_set_desc_copy(dev, "ATA channel 0");
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return (ata_probe(dev));
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}
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static int
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at91_channel_attach(device_t dev)
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{
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struct at91_cfata_softc *sc = device_get_softc(device_get_parent(dev));
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struct ata_channel *ch = device_get_softc(dev);
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int i;
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for (i = 0; i < ATA_MAX_RES; i++)
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ch->r_io[i].res = sc->mem_res;
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/*
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* CF+ Specification.
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* 6.1.3 Memory Mapped Addressing.
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*/
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ch->r_io[ATA_DATA].offset = 0x00;
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ch->r_io[ATA_FEATURE].offset = 0x01;
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ch->r_io[ATA_COUNT].offset = 0x02;
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ch->r_io[ATA_SECTOR].offset = 0x03;
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ch->r_io[ATA_CYL_LSB].offset = 0x04;
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ch->r_io[ATA_CYL_MSB].offset = 0x05;
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ch->r_io[ATA_DRIVE].offset = 0x06;
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ch->r_io[ATA_COMMAND].offset = 0x07;
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ch->r_io[ATA_ERROR].offset = 0x01;
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ch->r_io[ATA_IREASON].offset = 0x02;
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ch->r_io[ATA_STATUS].offset = 0x07;
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ch->r_io[ATA_ALTSTAT].offset = 0x0e;
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ch->r_io[ATA_CONTROL].offset = 0x0e;
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/* Should point at the base of registers. */
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ch->r_io[ATA_IDX_ADDR].offset = 0x0;
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ata_generic_hw(dev);
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return (ata_attach(dev));
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}
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static device_method_t at91_cfata_methods[] = {
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/* Device interface. */
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DEVMETHOD(device_probe, at91_cfata_probe),
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DEVMETHOD(device_attach, at91_cfata_attach),
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DEVMETHOD(device_detach, at91_cfata_detach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD(device_suspend, bus_generic_suspend),
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DEVMETHOD(device_resume, bus_generic_resume),
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/* ATA bus methods. */
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DEVMETHOD(bus_alloc_resource, ata_at91_alloc_resource),
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DEVMETHOD(bus_release_resource, ata_at91_release_resource),
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DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
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DEVMETHOD(bus_deactivate_resource,
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bus_generic_deactivate_resource),
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DEVMETHOD(bus_setup_intr, ata_at91_setup_intr),
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DEVMETHOD(bus_teardown_intr, ata_at91_teardown_intr),
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{ 0, 0 }
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};
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devclass_t at91_cfata_devclass;
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static driver_t at91_cfata_driver = {
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"at91_cfata",
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at91_cfata_methods,
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sizeof(struct at91_cfata_softc),
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};
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DRIVER_MODULE(at91_cfata, atmelarm, at91_cfata_driver, at91_cfata_devclass, 0,
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0);
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MODULE_VERSION(at91_cfata, 1);
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MODULE_DEPEND(at91_cfata, ata, 1, 1, 1);
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/*
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* ATA channel driver.
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*/
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static device_method_t at91_channel_methods[] = {
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/* device interface */
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DEVMETHOD(device_probe, at91_channel_probe),
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DEVMETHOD(device_attach, at91_channel_attach),
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DEVMETHOD(device_detach, ata_detach),
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DEVMETHOD(device_shutdown, bus_generic_shutdown),
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DEVMETHOD(device_suspend, ata_suspend),
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DEVMETHOD(device_resume, ata_resume),
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{ 0, 0 }
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};
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driver_t at91_channel_driver = {
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"ata",
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at91_channel_methods,
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sizeof(struct ata_channel),
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};
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DRIVER_MODULE(ata, at91_cfata, at91_channel_driver, ata_devclass, 0, 0);
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