aha_isa.c revision 40160 
1/*
2 * Product specific probe and attach routines for:
3 *      Adaptec 154x.
4 *
5 * Derived from code written by:
6 *
7 * Copyright (c) 1998 Justin T. Gibbs
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions, and the following disclaimer,
15 *    without modification, immediately at the beginning of the file.
16 * 2. The name of the author may not be used to endorse or promote products
17 *    derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
23 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 *	$Id: aha_isa.c,v 1.2 1998/09/24 10:43:42 bde Exp $
32 */
33
34#include <sys/param.h>
35#include <sys/systm.h>
36
37#include <machine/bus_pio.h>
38#include <machine/bus.h>
39
40#include <i386/isa/isa_device.h>
41#include <dev/aha/ahareg.h>
42
43#include <cam/scsi/scsi_all.h>
44
45static	int aha_isa_probe __P((struct isa_device *dev));
46static	int aha_isa_attach __P((struct isa_device *dev));
47static	void aha_isa_intr __P((void *unit));
48
49struct isa_driver ahadriver =
50{
51    aha_isa_probe,
52    aha_isa_attach,
53    "aha"
54};
55
56/*
57 * Check if the device can be found at the port given
58 * and if so, set it up ready for further work
59 * as an argument, takes the isa_device structure from
60 * autoconf.c
61 */
62static int
63aha_isa_probe(dev)
64	struct isa_device *dev;
65{
66	/*
67	 * find unit and check we have that many defined
68	 */
69	struct	aha_softc *aha;
70	int	port_index;
71        int	max_port_index;
72
73	/*
74	 * We ignore the unit number assigned by config to allow
75	 * consistant numbering between PCI/EISA/ISA devices.
76	 * This is a total kludge until we have a configuration
77	 * manager.
78	 */
79	dev->id_unit = aha_unit;
80
81	aha = NULL;
82	port_index = 0;
83	max_port_index = AHA_NUM_ISAPORTS - 1;
84	/*
85	 * Bound our board search if the user has
86	 * specified an exact port.
87	 */
88	if (dev->id_iobase > 0) {
89		for (;port_index <= max_port_index; port_index++)
90			if (dev->id_iobase >= aha_isa_ports[port_index].addr)
91				break;
92		if ((port_index > max_port_index)
93		 || (dev->id_iobase != aha_isa_ports[port_index].addr)) {
94			printf("
95aha_isa_probe: Invalid baseport of 0x%x specified.
96aha_isa_probe: Nearest valid baseport is 0x%x.
97aha_isa_probe: Failing probe.\n",
98			       dev->id_iobase,
99			       (port_index <= max_port_index)
100				    ? aha_isa_ports[port_index].addr
101				    : aha_isa_ports[max_port_index].addr);
102			return 0;
103		}
104		max_port_index = port_index;
105	}
106
107	/* Attempt to find an adapter */
108	for (;port_index <= max_port_index; port_index++) {
109		config_data_t config_data;
110		u_int ioport;
111		int error;
112
113		ioport = aha_isa_ports[port_index].addr;
114
115		/*
116		 * Ensure this port has not already been claimed already
117		 * by a PCI or EISA adapter.
118		 */
119		if (aha_check_probed_iop(ioport) != 0)
120			continue;
121
122		/*
123		 * Make sure that we do not conflict with another device's
124		 * I/O address.
125		 */
126		if (haveseen_isadev(dev, CC_IOADDR))
127			continue;
128
129		/* Allocate a softc for use during probing */
130		aha = aha_alloc(dev->id_unit, I386_BUS_SPACE_IO, ioport);
131
132		if (aha == NULL)
133			break;
134
135		/* We're going to attempt to probe it now, so mark it probed */
136		aha_mark_probed_bio(port_index);
137
138		/* See if there is really a card present */
139		if (aha_probe(aha) || aha_fetch_adapter_info(aha)) {
140			aha_free(aha);
141			continue;
142		}
143
144		/*
145		 * Determine our IRQ, and DMA settings and
146		 * export them to the configuration system.
147		 */
148		error = aha_cmd(aha, BOP_INQUIRE_CONFIG, NULL, /*parmlen*/0,
149			       (u_int8_t*)&config_data, sizeof(config_data),
150			       DEFAULT_CMD_TIMEOUT);
151		if (error != 0) {
152			printf("aha_isa_probe: Could not determine IRQ or DMA "
153			       "settings for adapter at 0x%x.  Failing probe\n",
154			       ioport);
155			aha_free(aha);
156			continue;
157		}
158
159		switch (config_data.dma_chan) {
160		case DMA_CHAN_5:
161			dev->id_drq = 5;
162			break;
163		case DMA_CHAN_6:
164			dev->id_drq = 6;
165			break;
166		case DMA_CHAN_7:
167			dev->id_drq = 7;
168			break;
169		default:
170			printf("aha_isa_probe: Invalid DMA setting "
171				"detected for adapter at 0x%x.  "
172				"Failing probe\n", ioport);
173		}
174		dev->id_iobase = aha_isa_ports[port_index].addr;
175		dev->id_irq = (config_data.irq << 9);
176		dev->id_intr = aha_isa_intr;
177
178		/*
179		 * OK, check to make sure that we're not stepping on
180		 * someone else's IRQ or DRQ
181		 */
182		if (haveseen_isadev(dev, CC_DRQ)) {
183			printf("aha_isa_probe: Aha card at I/O 0x%x's drq %d "
184				"conflicts, ignoring card.\n", dev->id_iobase,
185				dev->id_drq);
186			aha_free(aha);
187			return 0;
188		}
189		if (haveseen_isadev(dev, CC_IRQ)) {
190			printf("aha_isa_probe: Aha card at I/O 0x%x's irq %d "
191				"conflicts, ignoring card.\n", dev->id_iobase,
192				config_data.irq + 9);
193			aha_free(aha);
194			return 0;
195		}
196		aha_unit++;
197		return (AHA_NREGS);
198	}
199
200	return (0);
201}
202
203/*
204 * Attach all the sub-devices we can find
205 */
206static int
207aha_isa_attach(dev)
208	struct isa_device *dev;
209{
210	struct	aha_softc *aha;
211	bus_dma_filter_t *filter;
212	void		 *filter_arg;
213	bus_addr_t	 lowaddr;
214
215	aha = aha_softcs[dev->id_unit];
216	if (dev->id_drq != -1)
217		isa_dmacascade(dev->id_drq);
218
219	/* Allocate our parent dmatag */
220	filter = NULL;
221	filter_arg = NULL;
222	lowaddr = BUS_SPACE_MAXADDR_24BIT;
223
224	if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/0, /*boundary*/0,
225                               lowaddr, /*highaddr*/BUS_SPACE_MAXADDR,
226                               filter, filter_arg,
227                               /*maxsize*/BUS_SPACE_MAXSIZE_24BIT,
228                               /*nsegments*/BUS_SPACE_UNRESTRICTED,
229                               /*maxsegsz*/BUS_SPACE_MAXSIZE_24BIT,
230                               /*flags*/0, &aha->parent_dmat) != 0) {
231                aha_free(aha);
232                return (-1);
233        }
234
235        if (aha_init(aha)) {
236		printf("aha init failed\n");
237                aha_free(aha);
238                return (-1);
239        }
240
241	return (aha_attach(aha));
242}
243
244/*
245 * Handle an ISA interrupt.
246 * XXX should go away as soon as ISA interrupt handlers
247 * take a (void *) arg.
248 */
249static void
250aha_isa_intr(void *unit)
251{
252	struct aha_softc* arg = aha_softcs[(int)unit];
253	aha_intr((void *)arg);
254}
255