Add ISA attachement files for the aic7xxx driver.

Approved by: re
Reminded by: obrien

1 files changed, 299 insertions, 0 deletions

diff --git a/sys/dev/aic7xxx/ahc_isa.c b/sys/dev/aic7xxx/ahc_isa.c
new file mode 100644
index 0000000..48138ba
--- /dev/null
+++ b/sys/dev/aic7xxx/ahc_isa.c
@@ -0,0 +1,299 @@
+/*
+ * FreeBSD, VLB/ISA product support functions
+ *
+ * Copyright (c) 2004 Justin T. Gibbs.
+ * 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,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
+ *
+ * $Id$
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <dev/aic7xxx/aic7xxx_osm.h>
+
+#include <sys/limits.h>		/* For CHAR_BIT*/
+#include <dev/eisa/eisaconf.h>	/* For EISA constants */
+#include <isa/isavar.h>		/* For ISA attach glue */
+
+
+static struct aic7770_identity *ahc_isa_find_device(bus_space_tag_t tag,
+						    bus_space_handle_t bsh);
+static void			ahc_isa_identify(driver_t *driver,
+						 device_t parent);
+static int			ahc_isa_probe(device_t dev);
+static int			ahc_isa_attach(device_t dev);
+
+/*
+ * Perform an EISA probe of the address with the addition
+ * of a "priming" step.  The 284X requires priming (a write
+ * to offset 0x80, the first EISA ID register) to ensure it
+ * is not mistaken as an EISA card.  Once we have the ID,
+ * lookup the controller in the aic7770 table of supported
+ * devices.
+ */
+static struct aic7770_identity *
+ahc_isa_find_device(bus_space_tag_t tag, bus_space_handle_t bsh) {
+	eisa_id_t id;
+	u_int	  id_size;
+	int	  i;
+
+	id = 0;
+	id_size = sizeof(id);
+	for (i = 0; i < id_size; i++) {
+		bus_space_write_1(tag, bsh, 0x80, 0x80 + i);
+		id |= bus_space_read_1(tag, bsh, 0x80 + i)
+		   << ((id_size - i - 1) * CHAR_BIT);
+	}
+                           
+	return (aic7770_find_device(id));
+}
+
+static void
+ahc_isa_identify(driver_t *driver, device_t parent)
+{
+	int slot;
+	int max_slot;
+
+	max_slot = 14;
+	for (slot = 0; slot <= max_slot; slot++) {
+		struct aic7770_identity *entry;
+		bus_space_tag_t	    tag;
+		bus_space_handle_t  bsh;
+		struct resource	   *regs;
+		uint32_t	    iobase;
+		int		    rid;
+
+		rid = 0;
+		iobase = (slot * EISA_SLOT_SIZE) + AHC_EISA_SLOT_OFFSET;
+		regs = bus_alloc_resource(parent, SYS_RES_IOPORT, &rid,
+					  iobase, iobase, AHC_EISA_IOSIZE,
+					  RF_ACTIVE);
+		if (regs == NULL) {
+			if (bootverbose)
+				printf("ahc_isa_probe %d: ioport 0x%x "
+				       "alloc failed\n", slot, iobase);
+			continue;
+		}
+
+		tag = rman_get_bustag(regs);
+		bsh = rman_get_bushandle(regs);
+
+		entry = ahc_isa_find_device(tag, bsh);
+		if (entry != NULL) {
+			device_t child;
+
+			child = BUS_ADD_CHILD(parent, ISA_ORDER_SPECULATIVE,
+					      "ahc", -1);
+			if (child != NULL) {
+				device_set_driver(child, driver);
+				bus_set_resource(child, SYS_RES_IOPORT,
+						 0, iobase, AHC_EISA_IOSIZE);
+			}
+		}
+		bus_release_resource(parent, SYS_RES_IOPORT, rid, regs);
+	}
+}
+
+static int
+ahc_isa_probe(device_t dev)
+{
+	struct	  aic7770_identity *entry;
+	bus_space_tag_t	    tag;
+	bus_space_handle_t  bsh;
+	struct	  resource *regs;
+	struct	  resource *irq;
+	uint32_t  iobase;
+	u_int	  intdef;
+	u_int	  hcntrl;
+	int	  irq_num;
+	int	  error;
+	int	  zero;
+
+	iobase = isa_get_port(dev);
+	error = ENODEV;
+	zero = 0;
+	regs = NULL;
+	irq = NULL;
+
+	regs = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &zero, RF_ACTIVE);
+	if (regs == NULL) {
+		device_printf(dev, "ioport 0x%x alloc failed\n", iobase);
+		return (ENOMEM);
+	}
+
+	tag = rman_get_bustag(regs);
+	bsh = rman_get_bushandle(regs);
+
+	entry = ahc_isa_find_device(tag, bsh);
+	if (entry == NULL)
+		goto cleanup;
+
+	/* Pause the card preseving the IRQ type */
+	hcntrl = bus_space_read_1(tag, bsh, HCNTRL) & IRQMS;
+	bus_space_write_1(tag, bsh, HCNTRL, hcntrl | PAUSE);
+	while ((bus_space_read_1(tag, bsh, HCNTRL) & PAUSE) == 0)
+		;
+
+	/* Make sure we have a valid interrupt vector */
+	intdef = bus_space_read_1(tag, bsh, INTDEF);
+	irq_num = intdef & VECTOR;
+	switch (irq_num) {
+	case 9: 
+	case 10:
+	case 11:
+	case 12:
+	case 14:
+	case 15:
+		break;
+	default:
+		device_printf(dev, "@0x%x: illegal irq setting %d\n",
+			      iobase, irq_num);
+		goto cleanup;
+	}
+
+	if (bus_set_resource(dev, SYS_RES_IRQ, zero, irq_num, 1) != 0)
+		goto cleanup;
+
+	/*
+	 * The 284X only supports edge triggered interrupts,
+	 * so do not claim RF_SHAREABLE.
+	 */
+	irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &zero,
+				     0 /*!(RF_ACTIVE|RF_SHAREABLE)*/);
+	if (irq != NULL) {
+		error = 0;
+		device_set_desc(dev, entry->name);
+	} else 
+		device_printf(dev, "@0x%x: irq %d allocation failed\n",
+			      iobase, irq_num);
+
+cleanup:
+	if (regs != NULL) {
+		bus_release_resource(dev, SYS_RES_IOPORT, zero, regs);
+		regs = NULL;
+	}
+
+	if (irq != NULL) {
+		bus_release_resource(dev, SYS_RES_IRQ, zero, irq);
+		irq = NULL;
+	}
+
+	return (error);
+}
+
+static int
+ahc_isa_attach(device_t dev)
+{
+	struct	 aic7770_identity *entry;
+	bus_space_tag_t	    tag;
+	bus_space_handle_t  bsh;
+	struct	  resource *regs;
+	struct	  ahc_softc *ahc;
+	char	 *name;
+	int	  zero;
+	int	  error;
+
+	zero = 0;
+	regs = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &zero, RF_ACTIVE);
+	if (regs == NULL)
+		return (ENOMEM);
+
+	tag = rman_get_bustag(regs);
+	bsh = rman_get_bushandle(regs);
+	entry = ahc_isa_find_device(tag, bsh);
+	bus_release_resource(dev, SYS_RES_IOPORT, zero, regs);
+	if (entry == NULL)
+		return (ENODEV);
+
+	/*
+	 * Allocate a softc for this card and
+	 * set it up for attachment by our
+	 * common detect routine.
+	 */
+	name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT);
+	if (name == NULL)
+		return (ENOMEM);
+	strcpy(name, device_get_nameunit(dev));
+	ahc = ahc_alloc(dev, name);
+	if (ahc == NULL)
+		return (ENOMEM);
+
+	ahc_set_unit(ahc, device_get_unit(dev));
+
+	/* Allocate a dmatag for our SCB DMA maps */
+	/* XXX Should be a child of the VLB/ISA bus dma tag */
+	error = aic_dma_tag_create(ahc, /*parent*/NULL, /*alignment*/1,
+				   /*boundary*/0,
+				   /*lowaddr*/BUS_SPACE_MAXADDR_32BIT,
+				   /*highaddr*/BUS_SPACE_MAXADDR,
+				   /*filter*/NULL, /*filterarg*/NULL,
+				   /*maxsize*/BUS_SPACE_MAXSIZE_32BIT,
+				   /*nsegments*/AHC_NSEG,
+				   /*maxsegsz*/AHC_MAXTRANSFER_SIZE,
+				   /*flags*/0,
+				   &ahc->parent_dmat);
+
+	if (error != 0) {
+		printf("ahc_isa_attach: Could not allocate DMA tag "
+		       "- error %d\n", error);
+		ahc_free(ahc);
+		return (ENOMEM);
+	}
+	ahc->dev_softc = dev;
+	error = aic7770_config(ahc, entry, /*unused ioport arg*/0);
+	if (error != 0) {
+		ahc_free(ahc);
+		return (error);
+	}
+
+	ahc_attach(ahc);
+	return (0);
+}
+
+static device_method_t ahc_isa_device_methods[] = {
+	/* Device interface */
+	DEVMETHOD(device_identify,      ahc_isa_identify),
+	DEVMETHOD(device_probe,		ahc_isa_probe),
+	DEVMETHOD(device_attach,	ahc_isa_attach),
+	DEVMETHOD(device_detach,	ahc_detach),
+	{ 0, 0 }
+};
+
+static driver_t ahc_isa_driver = {
+	"ahc",
+	ahc_isa_device_methods,
+	sizeof(struct ahc_softc)
+};
+
+DRIVER_MODULE(ahc_isa, isa, ahc_isa_driver, ahc_devclass, 0, 0);
+MODULE_DEPEND(ahc_isa, ahc, 1, 1, 1);
+MODULE_VERSION(ahc_isa, 1);