ahc_pci.c revision 102662 
1/*
2 * FreeBSD, PCI product support functions
3 *
4 * Copyright (c) 1995-2001 Justin T. Gibbs
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions, and the following disclaimer,
12 *    without modification, immediately at the beginning of the file.
13 * 2. The name of the author may not be used to endorse or promote products
14 *    derived from this software without specific prior written permission.
15 *
16 * Alternatively, this software may be distributed under the terms of the
17 * GNU Public License ("GPL").
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: //depot/aic7xxx/freebsd/dev/aic7xxx/ahc_pci.c#7 $
32 *
33 * $FreeBSD: head/sys/dev/aic7xxx/ahc_pci.c 102662 2002-08-31 03:04:08Z gibbs $
34 */
35
36#include <dev/aic7xxx/aic7xxx_osm.h>
37
38#define	AHC_PCI_IOADDR  PCIR_MAPS	/* I/O Address */
39#define	AHC_PCI_MEMADDR (PCIR_MAPS + 4) /* Mem I/O Address */
40
41static int ahc_pci_probe(device_t dev);
42static int ahc_pci_attach(device_t dev);
43
44static device_method_t ahc_pci_device_methods[] = {
45	/* Device interface */
46	DEVMETHOD(device_probe,		ahc_pci_probe),
47	DEVMETHOD(device_attach,	ahc_pci_attach),
48	DEVMETHOD(device_detach,	ahc_detach),
49	{ 0, 0 }
50};
51
52static driver_t ahc_pci_driver = {
53	"ahc_pci",
54	ahc_pci_device_methods,
55	sizeof(struct ahc_softc)
56};
57
58static devclass_t ahc_pci_devclass;
59
60DRIVER_MODULE(ahc_pci, pci, ahc_pci_driver, ahc_pci_devclass, 0, 0);
61DRIVER_MODULE(ahc_pci, cardbus, ahc_pci_driver, ahc_pci_devclass, 0, 0);
62MODULE_DEPEND(ahc_pci, ahc, 1, 1, 1);
63MODULE_VERSION(ahc_pci, 1);
64
65static int
66ahc_pci_probe(device_t dev)
67{
68	struct	ahc_pci_identity *entry;
69
70	entry = ahc_find_pci_device(dev);
71	if (entry != NULL) {
72		device_set_desc(dev, entry->name);
73		return (0);
74	}
75	return (ENXIO);
76}
77
78static int
79ahc_pci_attach(device_t dev)
80{
81	struct	 ahc_pci_identity *entry;
82	struct	 ahc_softc *ahc;
83	char	*name;
84	int	 error;
85
86	entry = ahc_find_pci_device(dev);
87	if (entry == NULL)
88		return (ENXIO);
89
90	/*
91	 * Allocate a softc for this card and
92	 * set it up for attachment by our
93	 * common detect routine.
94	 */
95	name = malloc(strlen(device_get_nameunit(dev)) + 1, M_DEVBUF, M_NOWAIT);
96	if (name == NULL)
97		return (ENOMEM);
98	strcpy(name, device_get_nameunit(dev));
99	ahc = ahc_alloc(dev, name);
100	if (ahc == NULL)
101		return (ENOMEM);
102
103	ahc_set_unit(ahc, device_get_unit(dev));
104
105	/*
106	 * Should we bother disabling 39Bit addressing
107	 * based on installed memory?
108	 */
109	if (sizeof(bus_addr_t) > 4)
110                ahc->flags |= AHC_39BIT_ADDRESSING;
111
112	/* Allocate a dmatag for our SCB DMA maps */
113	/* XXX Should be a child of the PCI bus dma tag */
114	error = bus_dma_tag_create(/*parent*/NULL, /*alignment*/1,
115				   /*boundary*/0,
116				   (ahc->flags & AHC_39BIT_ADDRESSING)
117				   ? 0x7FFFFFFFFF
118				   : BUS_SPACE_MAXADDR_32BIT,
119				   /*highaddr*/BUS_SPACE_MAXADDR,
120				   /*filter*/NULL, /*filterarg*/NULL,
121				   /*maxsize*/MAXBSIZE, /*nsegments*/AHC_NSEG,
122				   /*maxsegsz*/AHC_MAXTRANSFER_SIZE,
123				   /*flags*/BUS_DMA_ALLOCNOW,
124				   &ahc->parent_dmat);
125
126	if (error != 0) {
127		printf("ahc_pci_attach: Could not allocate DMA tag "
128		       "- error %d\n", error);
129		ahc_free(ahc);
130		return (ENOMEM);
131	}
132	ahc->dev_softc = dev;
133	error = ahc_pci_config(ahc, entry);
134	if (error != 0) {
135		ahc_free(ahc);
136		return (error);
137	}
138
139	ahc_attach(ahc);
140	return (0);
141}
142
143int
144ahc_pci_map_registers(struct ahc_softc *ahc)
145{
146	struct	resource *regs;
147	u_int	command;
148	int	regs_type;
149	int	regs_id;
150
151	command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, /*bytes*/1);
152	regs = NULL;
153	regs_type = 0;
154	regs_id = 0;
155#ifdef AHC_ALLOW_MEMIO
156	if ((command & PCIM_CMD_MEMEN) != 0) {
157
158		regs_type = SYS_RES_MEMORY;
159		regs_id = AHC_PCI_MEMADDR;
160		regs = bus_alloc_resource(ahc->dev_softc, regs_type,
161					  &regs_id, 0, ~0, 1, RF_ACTIVE);
162		if (regs != NULL) {
163			ahc->tag = rman_get_bustag(regs);
164			ahc->bsh = rman_get_bushandle(regs);
165
166			/*
167			 * Do a quick test to see if memory mapped
168			 * I/O is functioning correctly.
169			 */
170			if (ahc_inb(ahc, HCNTRL) == 0xFF) {
171				device_printf(ahc->dev_softc,
172				       "PCI Device %d:%d:%d failed memory "
173				       "mapped test.  Using PIO.\n",
174				       ahc_get_pci_bus(ahc->dev_softc),
175				       ahc_get_pci_slot(ahc->dev_softc),
176				       ahc_get_pci_function(ahc->dev_softc));
177				bus_release_resource(ahc->dev_softc, regs_type,
178						     regs_id, regs);
179				regs = NULL;
180			} else {
181				command &= ~PCIM_CMD_PORTEN;
182				ahc_pci_write_config(ahc->dev_softc,
183						     PCIR_COMMAND,
184						     command, /*bytes*/1);
185			}
186		}
187	}
188#endif
189	if (regs == NULL && (command & PCIM_CMD_PORTEN) != 0) {
190		regs_type = SYS_RES_IOPORT;
191		regs_id = AHC_PCI_IOADDR;
192		regs = bus_alloc_resource(ahc->dev_softc, regs_type,
193					  &regs_id, 0, ~0, 1, RF_ACTIVE);
194		if (regs != NULL) {
195			ahc->tag = rman_get_bustag(regs);
196			ahc->bsh = rman_get_bushandle(regs);
197			command &= ~PCIM_CMD_MEMEN;
198			ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
199					     command, /*bytes*/1);
200		}
201	}
202	if (regs == NULL) {
203		device_printf(ahc->dev_softc,
204			      "can't allocate register resources\n");
205		return (ENOMEM);
206	}
207	ahc->platform_data->regs_res_type = regs_type;
208	ahc->platform_data->regs_res_id = regs_id;
209	ahc->platform_data->regs = regs;
210	return (0);
211}
212
213int
214ahc_pci_map_int(struct ahc_softc *ahc)
215{
216	int zero;
217
218	zero = 0;
219	ahc->platform_data->irq =
220	    bus_alloc_resource(ahc->dev_softc, SYS_RES_IRQ, &zero,
221			       0, ~0, 1, RF_ACTIVE | RF_SHAREABLE);
222	if (ahc->platform_data->irq == NULL) {
223		device_printf(ahc->dev_softc,
224			      "bus_alloc_resource() failed to allocate IRQ\n");
225		return (ENOMEM);
226	}
227	ahc->platform_data->irq_res_type = SYS_RES_IRQ;
228	return (ahc_map_int(ahc));
229}
230
231void
232ahc_power_state_change(struct ahc_softc *ahc, ahc_power_state new_state)
233{
234	uint32_t cap;
235	u_int cap_offset;
236
237	/*
238	 * Traverse the capability list looking for
239	 * the power management capability.
240	 */
241	cap = 0;
242	cap_offset = ahc_pci_read_config(ahc->dev_softc,
243					 PCIR_CAP_PTR, /*bytes*/1);
244	while (cap_offset != 0) {
245
246		cap = ahc_pci_read_config(ahc->dev_softc,
247					  cap_offset, /*bytes*/4);
248		if ((cap & 0xFF) == 1
249		 && ((cap >> 16) & 0x3) > 0) {
250			uint32_t pm_control;
251
252			pm_control = ahc_pci_read_config(ahc->dev_softc,
253							 cap_offset + 4,
254							 /*bytes*/2);
255			pm_control &= ~0x3;
256			pm_control |= new_state;
257			ahc_pci_write_config(ahc->dev_softc,
258					     cap_offset + 4,
259					     pm_control, /*bytes*/2);
260			break;
261		}
262		cap_offset = (cap >> 8) & 0xFF;
263	}
264}
265