xref: /openbsd-src/sys/dev/pci/if_atw_pci.c (revision 0f9891f1fafd8f53a63c41edb56ce51e2589b910)
1 /*	$OpenBSD: if_atw_pci.c,v 1.20 2024/05/24 06:02:53 jsg Exp $	*/
2 /*	$NetBSD: if_atw_pci.c,v 1.7 2004/07/23 07:07:55 dyoung Exp $	*/
3 
4 /*-
5  * Copyright (c) 1998, 1999, 2000, 2002 The NetBSD Foundation, Inc.
6  * All rights reserved.
7  *
8  * This code is derived from software contributed to The NetBSD Foundation
9  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
10  * NASA Ames Research Center; Charles M. Hannum; and David Young.
11  *
12  * Redistribution and use in source and binary forms, with or without
13  * modification, are permitted provided that the following conditions
14  * are met:
15  * 1. Redistributions of source code must retain the above copyright
16  *    notice, this list of conditions and the following disclaimer.
17  * 2. Redistributions in binary form must reproduce the above copyright
18  *    notice, this list of conditions and the following disclaimer in the
19  *    documentation and/or other materials provided with the distribution.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
23  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
25  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31  * POSSIBILITY OF SUCH DAMAGE.
32  */
33 
34 /*
35  * PCI bus front-end for the ADMtek ADM8211 802.11 MAC/BBP chip.
36  *
37  * Derived from the ``Tulip'' PCI bus front-end.
38  */
39 
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/device.h>
43 
44 #include <net/if.h>
45 #include <net/if_media.h>
46 #include <netinet/in.h>
47 #include <netinet/if_ether.h>
48 
49 #include <net80211/ieee80211_radiotap.h>
50 #include <net80211/ieee80211_var.h>
51 
52 #include <machine/bus.h>
53 #include <machine/intr.h>
54 
55 #include <dev/ic/atwreg.h>
56 #include <dev/ic/atwvar.h>
57 
58 #include <dev/pci/pcivar.h>
59 #include <dev/pci/pcireg.h>
60 #include <dev/pci/pcidevs.h>
61 
62 /*
63  * PCI configuration space registers used by the ADM8211.
64  */
65 #define	ATW_PCI_IOBA		0x10	/* i/o mapped base */
66 #define	ATW_PCI_MMBA		0x14	/* memory mapped base */
67 
68 struct atw_pci_softc {
69 	struct atw_softc	psc_atw;	/* real ADM8211 softc */
70 
71 	pci_intr_handle_t	psc_ih;		/* interrupt handle */
72 	void			*psc_intrcookie;
73 
74 	pci_chipset_tag_t	psc_pc;		/* our PCI chipset */
75 	pcitag_t		psc_pcitag;	/* our PCI tag */
76 };
77 
78 int	atw_pci_match(struct device *, void *, void *);
79 void	atw_pci_attach(struct device *, struct device *, void *);
80 int	atw_pci_detach(struct device *, int);
81 
82 const struct cfattach atw_pci_ca = {
83     sizeof (struct atw_softc), atw_pci_match, atw_pci_attach, atw_pci_detach,
84     atw_activate
85 };
86 
87 const struct pci_matchid atw_pci_devices[] = {
88 	{ PCI_VENDOR_ADMTEK,		PCI_PRODUCT_ADMTEK_ADM8211 },
89 	{ PCI_VENDOR_3COM,		PCI_PRODUCT_3COM_3CRSHPW796 }
90 };
91 
92 int
atw_pci_match(struct device * parent,void * match,void * aux)93 atw_pci_match(struct device *parent, void *match, void *aux)
94 {
95 	return (pci_matchbyid((struct pci_attach_args *)aux, atw_pci_devices,
96 	    nitems(atw_pci_devices)));
97 }
98 
99 static int
atw_pci_enable(struct atw_softc * sc)100 atw_pci_enable(struct atw_softc *sc)
101 {
102 	struct atw_pci_softc *psc = (void *)sc;
103 
104 	/* Establish the interrupt. */
105 	psc->psc_intrcookie = pci_intr_establish(psc->psc_pc, psc->psc_ih,
106 	    IPL_NET, atw_intr, sc, sc->sc_dev.dv_xname);
107 	if (psc->psc_intrcookie == NULL) {
108 		printf("%s: unable to establish interrupt\n",
109 		    sc->sc_dev.dv_xname);
110 		return (1);
111 	}
112 
113 	return (0);
114 }
115 
116 static void
atw_pci_disable(struct atw_softc * sc)117 atw_pci_disable(struct atw_softc *sc)
118 {
119 	struct atw_pci_softc *psc = (void *)sc;
120 
121 	/* Unhook the interrupt handler. */
122 	pci_intr_disestablish(psc->psc_pc, psc->psc_intrcookie);
123 	psc->psc_intrcookie = NULL;
124 }
125 
126 void
atw_pci_attach(struct device * parent,struct device * self,void * aux)127 atw_pci_attach(struct device *parent, struct device *self, void *aux)
128 {
129 	struct atw_pci_softc *psc = (void *) self;
130 	struct atw_softc *sc = &psc->psc_atw;
131 	struct pci_attach_args *pa = aux;
132 	pci_chipset_tag_t pc = pa->pa_pc;
133 	const char *intrstr = NULL;
134 	bus_space_tag_t iot, memt;
135 	bus_space_handle_t ioh, memh;
136 	bus_size_t iosize, memsize;
137 	int ioh_valid, memh_valid;
138 
139 	psc->psc_pc = pa->pa_pc;
140 	psc->psc_pcitag = pa->pa_tag;
141 
142 	/*
143 	 * No power management hooks.
144 	 * XXX Maybe we should add some!
145 	 */
146 	sc->sc_flags |= ATWF_ENABLED;
147 
148 	/*
149 	 * Get revision info, and set some chip-specific variables.
150 	 */
151 	sc->sc_rev = PCI_REVISION(pa->pa_class);
152 
153 	/*
154 	 * Check to see if the device is in power-save mode, and
155 	 * being it out if necessary.
156 	 *
157 	 * XXX This code comes almost verbatim from if_tlp_pci.c. I do
158 	 * not understand it. Tulip clears the "sleep mode" bit in the
159 	 * CFDA register, first.  There is an equivalent (?) register at the
160 	 * same place in the ADM8211, but the docs do not assign its bits
161 	 * any meanings. -dcy
162 	 */
163 	pci_set_powerstate(pc, pa->pa_tag, PCI_PMCSR_STATE_D0);
164 
165 	/*
166 	 * Map the device.
167 	 */
168 	ioh_valid = (pci_mapreg_map(pa, ATW_PCI_IOBA,
169 	    PCI_MAPREG_TYPE_IO, 0,
170 	    &iot, &ioh, NULL, &iosize, 0) == 0);
171 	memh_valid = (pci_mapreg_map(pa, ATW_PCI_MMBA,
172 	    PCI_MAPREG_TYPE_MEM|PCI_MAPREG_MEM_TYPE_32BIT, 0,
173 	    &memt, &memh, NULL, &memsize, 0) == 0);
174 
175 	if (memh_valid) {
176 		sc->sc_st = memt;
177 		sc->sc_sh = memh;
178 		sc->sc_mapsize = memsize;
179 	} else if (ioh_valid) {
180 		sc->sc_st = iot;
181 		sc->sc_sh = ioh;
182 		sc->sc_mapsize = iosize;
183 	} else {
184 		printf(": unable to map device registers\n");
185 		return;
186 	}
187 
188 	sc->sc_dmat = pa->pa_dmat;
189 
190 	/*
191 	 * Get the cacheline size.
192 	 */
193 	sc->sc_cacheline = PCI_CACHELINE(pci_conf_read(pc, pa->pa_tag,
194 	    PCI_BHLC_REG));
195 
196 	/*
197 	 * Get PCI data moving command info.
198 	 */
199 	if (pa->pa_flags & PCI_FLAGS_MRL_OKAY) /* read line */
200 		sc->sc_flags |= ATWF_MRL;
201 	if (pa->pa_flags & PCI_FLAGS_MRM_OKAY) /* read multiple */
202 		sc->sc_flags |= ATWF_MRM;
203 	if (pa->pa_flags & PCI_FLAGS_MWI_OKAY) /* write invalidate */
204 		sc->sc_flags |= ATWF_MWI;
205 
206 	/*
207 	 * Map and establish our interrupt.
208 	 */
209 	if (pci_intr_map(pa, &psc->psc_ih)) {
210 		printf(": unable to map interrupt\n");
211 		return;
212 	}
213 	intrstr = pci_intr_string(pc, psc->psc_ih);
214 	psc->psc_intrcookie = pci_intr_establish(pc, psc->psc_ih, IPL_NET,
215 	    atw_intr, sc, sc->sc_dev.dv_xname);
216 	if (psc->psc_intrcookie == NULL) {
217 		printf(": unable to establish interrupt");
218 		if (intrstr != NULL)
219 			printf(" at %s", intrstr);
220 		printf("\n");
221 		return;
222 	}
223 
224 	printf(": %s\n", intrstr);
225 
226 	sc->sc_enable = atw_pci_enable;
227 	sc->sc_disable = atw_pci_disable;
228 
229 	/*
230 	 * Finish off the attach.
231 	 */
232 	atw_attach(sc);
233 }
234 
235 int
atw_pci_detach(struct device * self,int flags)236 atw_pci_detach(struct device *self, int flags)
237 {
238 	struct atw_pci_softc *psc = (void *)self;
239 	struct atw_softc *sc = &psc->psc_atw;
240 	int rv;
241 
242 	rv = atw_detach(sc);
243 	if (rv)
244 		return (rv);
245 
246 	if (psc->psc_intrcookie != NULL)
247 		pci_intr_disestablish(psc->psc_pc, psc->psc_intrcookie);
248 
249 	bus_space_unmap(sc->sc_st, sc->sc_sh, sc->sc_mapsize);
250 
251 	return (0);
252 }
253