c25fb06d92
required by arches like sparc64 (not yet implemented) and sun4v where there are seperate IOMMU's for each PCI bus... For all other arches, it will end up returning NULL, which makes it a no-op... Convert a few drivers (the ones we've been working w/ on sun4v) to the new convection... Eventually all drivers will need to replace the parent tag of NULL, w/ bus_get_dma_tag(dev), though dev is usually different for each driver, and will require hand inspection... Reviewed by: scottl (earlier version)
303 lines
8.0 KiB
C
303 lines
8.0 KiB
C
/*-
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* FreeBSD, VLB/ISA product support functions
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*
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* Copyright (c) 2004 Justin T. Gibbs.
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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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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*
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* $Id$
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <dev/aic7xxx/aic7xxx_osm.h>
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#include <sys/limits.h> /* For CHAR_BIT*/
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#include <isa/isavar.h> /* For ISA attach glue */
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static struct aic7770_identity *ahc_isa_find_device(bus_space_tag_t tag,
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bus_space_handle_t bsh);
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static void ahc_isa_identify(driver_t *driver,
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device_t parent);
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static int ahc_isa_probe(device_t dev);
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static int ahc_isa_attach(device_t dev);
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/*
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* Perform an EISA probe of the address with the addition
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* of a "priming" step. The 284X requires priming (a write
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* to offset 0x80, the first EISA ID register) to ensure it
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* is not mistaken as an EISA card. Once we have the ID,
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* lookup the controller in the aic7770 table of supported
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* devices.
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*/
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static struct aic7770_identity *
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ahc_isa_find_device(bus_space_tag_t tag, bus_space_handle_t bsh) {
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uint32_t id;
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u_int id_size;
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int i;
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id = 0;
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id_size = sizeof(id);
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for (i = 0; i < id_size; i++) {
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bus_space_write_1(tag, bsh, 0x80, 0x80 + i);
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id |= bus_space_read_1(tag, bsh, 0x80 + i)
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<< ((id_size - i - 1) * CHAR_BIT);
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}
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return (aic7770_find_device(id));
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}
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static void
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ahc_isa_identify(driver_t *driver, device_t parent)
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{
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int slot;
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int max_slot;
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max_slot = 14;
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for (slot = 0; slot <= max_slot; slot++) {
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struct aic7770_identity *entry;
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bus_space_tag_t tag;
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bus_space_handle_t bsh;
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struct resource *regs;
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uint32_t iobase;
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int rid;
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rid = 0;
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iobase = (slot * AHC_EISA_SLOT_SIZE) + AHC_EISA_SLOT_OFFSET;
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regs = bus_alloc_resource(parent, SYS_RES_IOPORT, &rid,
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iobase, iobase, AHC_EISA_IOSIZE,
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RF_ACTIVE);
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if (regs == NULL) {
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if (bootverbose)
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printf("ahc_isa_probe %d: ioport 0x%x "
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"alloc failed\n", slot, iobase);
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continue;
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}
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tag = rman_get_bustag(regs);
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bsh = rman_get_bushandle(regs);
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entry = ahc_isa_find_device(tag, bsh);
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if (entry != NULL) {
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device_t child;
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child = BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE,
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"ahc", -1);
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if (child != NULL) {
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device_set_driver(child, driver);
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bus_set_resource(child, SYS_RES_IOPORT,
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0, iobase, AHC_EISA_IOSIZE);
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}
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}
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bus_release_resource(parent, SYS_RES_IOPORT, rid, regs);
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}
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}
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static int
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ahc_isa_probe(device_t dev)
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{
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struct aic7770_identity *entry;
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bus_space_tag_t tag;
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bus_space_handle_t bsh;
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struct resource *regs;
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struct resource *irq;
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uint32_t iobase;
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u_int intdef;
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u_int hcntrl;
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int irq_num;
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int error;
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int zero;
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error = ENXIO;
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zero = 0;
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regs = NULL;
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irq = NULL;
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/* Skip probes for ISA PnP devices */
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if (isa_get_logicalid(dev) != 0)
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return (error);
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regs = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &zero, RF_ACTIVE);
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if (regs == NULL) {
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device_printf(dev, "No resources allocated.\n");
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return (ENOMEM);
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}
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iobase = rman_get_start(regs);
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tag = rman_get_bustag(regs);
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bsh = rman_get_bushandle(regs);
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entry = ahc_isa_find_device(tag, bsh);
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if (entry == NULL)
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goto cleanup;
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/* Pause the card preseving the IRQ type */
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hcntrl = bus_space_read_1(tag, bsh, HCNTRL) & IRQMS;
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bus_space_write_1(tag, bsh, HCNTRL, hcntrl | PAUSE);
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while ((bus_space_read_1(tag, bsh, HCNTRL) & PAUSE) == 0)
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;
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/* Make sure we have a valid interrupt vector */
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intdef = bus_space_read_1(tag, bsh, INTDEF);
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irq_num = intdef & VECTOR;
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switch (irq_num) {
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case 9:
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case 10:
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case 11:
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case 12:
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case 14:
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case 15:
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break;
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default:
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device_printf(dev, "@0x%x: illegal irq setting %d\n",
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iobase, irq_num);
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goto cleanup;
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}
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if (bus_set_resource(dev, SYS_RES_IRQ, zero, irq_num, 1) != 0)
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goto cleanup;
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/*
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* The 284X only supports edge triggered interrupts,
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* so do not claim RF_SHAREABLE.
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*/
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irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &zero,
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0 /*!(RF_ACTIVE|RF_SHAREABLE)*/);
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if (irq != NULL) {
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error = 0;
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device_set_desc(dev, entry->name);
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} else
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device_printf(dev, "@0x%x: irq %d allocation failed\n",
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iobase, irq_num);
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cleanup:
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if (regs != NULL) {
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bus_release_resource(dev, SYS_RES_IOPORT, zero, regs);
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regs = NULL;
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}
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if (irq != NULL) {
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bus_release_resource(dev, SYS_RES_IRQ, zero, irq);
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irq = NULL;
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}
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return (error);
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}
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static int
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ahc_isa_attach(device_t dev)
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{
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struct aic7770_identity *entry;
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bus_space_tag_t tag;
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bus_space_handle_t bsh;
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struct resource *regs;
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struct ahc_softc *ahc;
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char *name;
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int zero;
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int error;
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zero = 0;
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regs = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &zero, RF_ACTIVE);
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if (regs == NULL)
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return (ENOMEM);
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tag = rman_get_bustag(regs);
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bsh = rman_get_bushandle(regs);
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entry = ahc_isa_find_device(tag, bsh);
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bus_release_resource(dev, SYS_RES_IOPORT, zero, regs);
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if (entry == NULL)
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return (ENODEV);
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/*
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* Allocate a softc for this card and
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* set it up for attachment by our
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* common detect routine.
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*/
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name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT);
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if (name == NULL)
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return (ENOMEM);
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strcpy(name, device_get_nameunit(dev));
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ahc = ahc_alloc(dev, name);
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if (ahc == NULL)
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return (ENOMEM);
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ahc_set_unit(ahc, device_get_unit(dev));
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/* Allocate a dmatag for our SCB DMA maps */
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/* XXX Should be a child of the VLB/ISA bus dma tag */
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error = aic_dma_tag_create(ahc, /*parent*/bus_get_dma_tag(dev),
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/*alignment*/1, /*boundary*/0,
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/*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
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/*highaddr*/BUS_SPACE_MAXADDR,
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/*filter*/NULL, /*filterarg*/NULL,
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/*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
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/*nsegments*/AHC_NSEG,
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/*maxsegsz*/AHC_MAXTRANSFER_SIZE,
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/*flags*/0,
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&ahc->parent_dmat);
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if (error != 0) {
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printf("ahc_isa_attach: Could not allocate DMA tag "
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"- error %d\n", error);
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ahc_free(ahc);
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return (ENOMEM);
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}
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ahc->dev_softc = dev;
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error = aic7770_config(ahc, entry, /*unused ioport arg*/0);
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if (error != 0) {
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ahc_free(ahc);
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return (error);
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}
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ahc_attach(ahc);
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return (0);
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}
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static device_method_t ahc_isa_device_methods[] = {
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/* Device interface */
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DEVMETHOD(device_identify, ahc_isa_identify),
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DEVMETHOD(device_probe, ahc_isa_probe),
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DEVMETHOD(device_attach, ahc_isa_attach),
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DEVMETHOD(device_detach, ahc_detach),
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{ 0, 0 }
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};
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static driver_t ahc_isa_driver = {
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"ahc",
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ahc_isa_device_methods,
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sizeof(struct ahc_softc)
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};
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DRIVER_MODULE(ahc_isa, isa, ahc_isa_driver, ahc_devclass, 0, 0);
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MODULE_DEPEND(ahc_isa, ahc, 1, 1, 1);
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MODULE_VERSION(ahc_isa, 1);
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