xref: /freebsd/sys/powerpc/psim/ata_iobus.c (revision 5b20c5e1f8d59f14901f0c0e4b6b577eaa3f9569)
1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
3  *
4  * Copyright 2002 by Peter Grehan. All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  * 3. The name of the author may not be used to endorse or promote products
15  *    derived from this software without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
22  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
24  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  */
29 
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32 
33 /*
34  * PSIM local bus ATA controller
35  */
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/kernel.h>
39 #include <sys/module.h>
40 #include <sys/bus.h>
41 #include <sys/malloc.h>
42 #include <sys/sema.h>
43 #include <sys/taskqueue.h>
44 #include <machine/stdarg.h>
45 #include <vm/uma.h>
46 #include <machine/resource.h>
47 #include <machine/bus.h>
48 #include <sys/rman.h>
49 #include <sys/ata.h>
50 #include <dev/ata/ata-all.h>
51 #include <ata_if.h>
52 
53 #include <dev/ofw/openfirm.h>
54 #include <powerpc/psim/iobusvar.h>
55 
56 /*
57  * Define the iobus ata bus attachment. This creates a pseudo-bus that
58  * the ATA device can be attached to
59  */
60 static  int  ata_iobus_attach(device_t dev);
61 static  int  ata_iobus_probe(device_t dev);
62 static  int  ata_iobus_print_child(device_t dev, device_t child);
63 struct resource *ata_iobus_alloc_resource(device_t, device_t, int, int *,
64 					  rman_res_t, rman_res_t, rman_res_t,
65 					  u_int);
66 static int ata_iobus_release_resource(device_t, device_t, int, int,
67 				      struct resource *);
68 
69 static device_method_t ata_iobus_methods[] = {
70         /* Device interface */
71 	DEVMETHOD(device_probe,		ata_iobus_probe),
72 	DEVMETHOD(device_attach,        ata_iobus_attach),
73 	DEVMETHOD(device_shutdown,      bus_generic_shutdown),
74 	DEVMETHOD(device_suspend,       bus_generic_suspend),
75 	DEVMETHOD(device_resume,        bus_generic_resume),
76 
77 	/* Bus methods */
78 	DEVMETHOD(bus_print_child,          ata_iobus_print_child),
79 	DEVMETHOD(bus_alloc_resource,       ata_iobus_alloc_resource),
80 	DEVMETHOD(bus_release_resource,     ata_iobus_release_resource),
81 	DEVMETHOD(bus_activate_resource,    bus_generic_activate_resource),
82 	DEVMETHOD(bus_deactivate_resource,  bus_generic_deactivate_resource),
83 	DEVMETHOD(bus_setup_intr,           bus_generic_setup_intr),
84 	DEVMETHOD(bus_teardown_intr,        bus_generic_teardown_intr),
85 
86 	DEVMETHOD_END
87 };
88 
89 static driver_t ata_iobus_driver = {
90 	"ataiobus",
91 	ata_iobus_methods,
92 	0,
93 };
94 
95 static devclass_t ata_iobus_devclass;
96 
97 DRIVER_MODULE(ataiobus, iobus, ata_iobus_driver, ata_iobus_devclass, NULL,
98     NULL);
99 MODULE_DEPEND(ata, ata, 1, 1, 1);
100 
101 static int
102 ata_iobus_probe(device_t dev)
103 {
104 	char *type = iobus_get_name(dev);
105 
106 	if (strncmp(type, "ata", 3) != 0)
107 		return (ENXIO);
108 
109 	device_set_desc(dev, "PSIM ATA Controller");
110 	return (0);
111 }
112 
113 static int
114 ata_iobus_attach(device_t dev)
115 {
116 	/*
117 	 * Add a single child per controller. Should be able
118 	 * to add two
119 	 */
120 	device_add_child(dev, "ata", -1);
121 	return (bus_generic_attach(dev));
122 }
123 
124 static int
125 ata_iobus_print_child(device_t dev, device_t child)
126 {
127 	int retval = 0;
128 
129 	retval += bus_print_child_header(dev, child);
130 	/* irq ? */
131 	retval += bus_print_child_footer(dev, child);
132 
133 	return (retval);
134 }
135 
136 struct resource *
137 ata_iobus_alloc_resource(device_t dev, device_t child, int type, int *rid,
138 			 rman_res_t start, rman_res_t end, rman_res_t count,
139 			 u_int flags)
140 {
141 	struct resource *res = NULL;
142 	int myrid;
143 	u_int *ofw_regs;
144 
145 	ofw_regs = iobus_get_regs(dev);
146 
147 	/*
148 	 * The reg array for the PSIM ata device has 6 start/size entries:
149 	 *  0 - unused
150 	 *  1/2/3 - unused
151 	 *  4/5/6 - primary command
152 	 *  7/8/9 - secondary command
153 	 *  10/11/12 - primary control
154 	 *  13/14/15 - secondary control
155 	 *  16/17/18 - primary/secondary dma registers, unimplemented
156 	 *
157 	 *  The resource values are calculated from these registers
158 	 */
159 	if (type == SYS_RES_IOPORT) {
160 		switch (*rid) {
161 		case ATA_IOADDR_RID:
162 			myrid = 0;
163 			start = ofw_regs[4];
164 			end = start + ATA_IOSIZE - 1;
165 			count = ATA_IOSIZE;
166 			res = BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
167 						 SYS_RES_MEMORY, &myrid,
168 						 start, end, count, flags);
169 			break;
170 
171 		case ATA_CTLADDR_RID:
172 			myrid = 0;
173 			start = ofw_regs[10];
174 			end = start + ATA_CTLIOSIZE - 1;
175 			count = ATA_CTLIOSIZE;
176 			res = BUS_ALLOC_RESOURCE(device_get_parent(dev), child,
177 						 SYS_RES_MEMORY, &myrid,
178 						 start, end, count, flags);
179 			break;
180 
181 		case ATA_BMADDR_RID:
182 			/* DMA not properly supported by psim */
183 			break;
184 		}
185 		return (res);
186 
187 	} else if (type == SYS_RES_IRQ && *rid == ATA_IRQ_RID) {
188 		/*
189 		 * Pass this on to the parent
190 		 */
191 		return (BUS_ALLOC_RESOURCE(device_get_parent(dev), dev,
192 					   SYS_RES_IRQ, rid, 0, ~0, 1, flags));
193 
194 	} else {
195 		return (NULL);
196 	}
197 }
198 
199 static int
200 ata_iobus_release_resource(device_t dev, device_t child, int type, int rid,
201 			   struct resource *r)
202 {
203 	/* no hotplug... */
204 	return (0);
205 }
206 
207 /*
208  * Define the actual ATA device. This is a sub-bus to the ata-iobus layer
209  * to allow the higher layer bus to massage the resource allocation.
210  */
211 
212 static  int  ata_iobus_sub_probe(device_t dev);
213 static  int  ata_iobus_sub_setmode(device_t dev, int target, int mode);
214 
215 static device_method_t ata_iobus_sub_methods[] = {
216 	/* Device interface */
217 	DEVMETHOD(device_probe,     ata_iobus_sub_probe),
218 	DEVMETHOD(device_attach,    ata_attach),
219 	DEVMETHOD(device_detach,    ata_detach),
220 	DEVMETHOD(device_resume,    ata_resume),
221 
222 	/* ATA interface */
223 	DEVMETHOD(ata_setmode,	    ata_iobus_sub_setmode),
224 	DEVMETHOD_END
225 };
226 
227 static driver_t ata_iobus_sub_driver = {
228 	"ata",
229 	ata_iobus_sub_methods,
230 	sizeof(struct ata_channel),
231 };
232 
233 DRIVER_MODULE(ata, ataiobus, ata_iobus_sub_driver, ata_devclass, NULL, NULL);
234 
235 static int
236 ata_iobus_sub_probe(device_t dev)
237 {
238 	struct ata_channel *ch = device_get_softc(dev);
239 
240 	/* Only a single unit per controller thus far */
241 	ch->unit = 0;
242 	ch->flags = (ATA_USE_16BIT|ATA_NO_SLAVE);
243 	ata_generic_hw(dev);
244 
245 	return ata_probe(dev);
246 }
247 
248 static int
249 ata_iobus_sub_setmode(device_t parent, int target, int mode)
250 {
251 	/* Only ever PIO mode here... */
252 	return (ATA_PIO);
253 }
254