aha_isa.c revision 39616 
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 1.1 1998/09/15 07:39:55 gibbs 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	}
105
106	/* Attempt to find an adapter */
107	for (;port_index <= max_port_index; port_index++) {
108		config_data_t config_data;
109		u_int ioport;
110		int error;
111
112		ioport = aha_isa_ports[port_index].addr;
113
114		/*
115		 * Ensure this port has not already been claimed already
116		 * by a PCI or EISA adapter.
117		 */
118		if (aha_check_probed_iop(ioport) != 0)
119			continue;
120
121		/* Allocate a softc for use during probing */
122		aha = aha_alloc(dev->id_unit, I386_BUS_SPACE_IO, ioport);
123
124		if (aha == NULL)
125			break;
126
127		/* We're going to attempt to probe it now, so mark it probed */
128		aha_mark_probed_bio(port_index);
129
130		/* See if there is really a card present */
131		if (aha_probe(aha) || aha_fetch_adapter_info(aha)) {
132			aha_free(aha);
133			continue;
134		}
135
136		/*
137		 * Determine our IRQ, and DMA settings and
138		 * export them to the configuration system.
139		 */
140		error = aha_cmd(aha, BOP_INQUIRE_CONFIG, NULL, /*parmlen*/0,
141			       (u_int8_t*)&config_data, sizeof(config_data),
142			       DEFAULT_CMD_TIMEOUT);
143		if (error != 0) {
144			printf("aha_isa_probe: Could not determine IRQ or DMA "
145			       "settings for adapter at 0x%x.  Failing probe\n",
146			       ioport);
147			aha_free(aha);
148			continue;
149		}
150
151		switch (config_data.dma_chan) {
152		case DMA_CHAN_5:
153			dev->id_drq = 5;
154			break;
155		case DMA_CHAN_6:
156			dev->id_drq = 6;
157			break;
158		case DMA_CHAN_7:
159			dev->id_drq = 7;
160			break;
161		default:
162			printf("aha_isa_probe: Invalid DMA setting "
163				"detected for adapter at 0x%x.  "
164				"Failing probe\n", ioport);
165		}
166		dev->id_iobase = aha_isa_ports[port_index].addr;
167		dev->id_irq = (config_data.irq << 9);
168		dev->id_intr = aha_isa_intr;
169		aha_unit++;
170		return (AHA_NREGS);
171	}
172
173	return (0);
174}
175
176/*
177 * Attach all the sub-devices we can find
178 */
179static int
180aha_isa_attach(dev)
181	struct isa_device *dev;
182{
183	struct	aha_softc *aha;
184	bus_dma_filter_t *filter;
185	void		 *filter_arg;
186	bus_addr_t	 lowaddr;
187
188	aha = aha_softcs[dev->id_unit];
189	if (dev->id_drq != -1)
190		isa_dmacascade(dev->id_drq);
191
192	/* Allocate our parent dmatag */
193	filter = NULL;
194	filter_arg = NULL;
195	lowaddr = BUS_SPACE_MAXADDR_24BIT;
196
197	if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/0, /*boundary*/0,
198                               lowaddr, /*highaddr*/BUS_SPACE_MAXADDR,
199                               filter, filter_arg,
200                               /*maxsize*/BUS_SPACE_MAXSIZE_24BIT,
201                               /*nsegments*/BUS_SPACE_UNRESTRICTED,
202                               /*maxsegsz*/BUS_SPACE_MAXSIZE_24BIT,
203                               /*flags*/0, &aha->parent_dmat) != 0) {
204                aha_free(aha);
205                return (-1);
206        }
207
208        if (aha_init(aha)) {
209		printf("aha init failed\n");
210                aha_free(aha);
211                return (-1);
212        }
213
214	return (aha_attach(aha));
215}
216
217/*
218 * Handle an ISA interrupt.
219 * XXX should go away as soon as ISA interrupt handlers
220 * take a (void *) arg.
221 */
222static void
223aha_isa_intr(void *unit)
224{
225	struct aha_softc* arg = aha_softcs[(int)unit];
226	aha_intr((void *)arg);
227}
228