1 /* $NetBSD: atppc_puc.c,v 1.16 2018/12/09 11:14:01 jdolecek Exp $ */
2
3 /*-
4 * Copyright (c) 2004 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jaromir Dolecek.
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 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include "opt_atppc.h"
33
34 #include <sys/cdefs.h>
35 __KERNEL_RCSID(0, "$NetBSD: atppc_puc.c,v 1.16 2018/12/09 11:14:01 jdolecek Exp $");
36
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/errno.h>
40 #include <sys/ioctl.h>
41 #include <sys/syslog.h>
42 #include <sys/device.h>
43 #include <sys/proc.h>
44 #include <sys/termios.h>
45
46 #include <sys/bus.h>
47
48 #include <dev/pci/pcivar.h>
49 #include <dev/pci/pucvar.h>
50
51 #include <dev/ic/atppcvar.h>
52
53 static int atppc_puc_match(device_t, cfdata_t, void *);
54 static void atppc_puc_attach(device_t, device_t, void *);
55
56 struct atppc_puc_softc {
57 /* Machine independent device data */
58 struct atppc_softc sc_atppc;
59
60 bus_dmamap_t sc_dmamap;
61 };
62
63 CFATTACH_DECL_NEW(atppc_puc, sizeof(struct atppc_puc_softc), atppc_puc_match,
64 atppc_puc_attach, NULL, NULL);
65
66 static int atppc_puc_dma_setup(struct atppc_puc_softc *);
67 static int atppc_puc_dma_start(struct atppc_softc *, void *, u_int,
68 u_int8_t);
69 static int atppc_puc_dma_finish(struct atppc_softc *);
70 static int atppc_puc_dma_abort(struct atppc_softc *);
71 static int atppc_puc_dma_malloc(device_t, void **, bus_addr_t *,
72 bus_size_t);
73 static void atppc_puc_dma_free(device_t, void **, bus_addr_t *,
74 bus_size_t);
75
76 /*
77 * atppc_acpi_match: autoconf(9) match routine
78 */
79 static int
atppc_puc_match(device_t parent,cfdata_t match,void * aux)80 atppc_puc_match(device_t parent, cfdata_t match, void *aux)
81 {
82 struct puc_attach_args *aa = aux;
83
84 /*
85 * Locators already matched, just check the type.
86 */
87 if (aa->type != PUC_PORT_TYPE_LPT)
88 return (0);
89
90 return (1);
91 }
92
93 static void
atppc_puc_attach(device_t parent,device_t self,void * aux)94 atppc_puc_attach(device_t parent, device_t self, void *aux)
95 {
96 struct atppc_softc *sc = device_private(self);
97 struct atppc_puc_softc *psc = device_private(self);
98 struct puc_attach_args *aa = aux;
99 const char *intrstr;
100 char intrbuf[PCI_INTRSTR_LEN];
101
102 sc->sc_dev_ok = ATPPC_NOATTACH;
103
104 if (aa->poll) {
105 aprint_error(": polling not supported\n");
106 return;
107 }
108
109 printf(": AT Parallel Port\n");
110
111 /* Attach */
112 sc->sc_dev = self;
113 sc->sc_iot = aa->t;
114 sc->sc_ioh = aa->h;
115 sc->sc_dmat = aa->dmat;
116 sc->sc_has = 0;
117
118 intrstr = pci_intr_string(aa->pc, aa->intrhandle, intrbuf,
119 sizeof(intrbuf));
120 sc->sc_ieh = pci_intr_establish_xname(aa->pc, aa->intrhandle, IPL_TTY,
121 atppcintr, sc, device_xname(self));
122 if (sc->sc_ieh == NULL) {
123 aprint_error_dev(sc->sc_dev, "couldn't establish interrupt");
124 if (intrstr != NULL)
125 aprint_error(" at %s", intrstr);
126 aprint_error("\n");
127 return;
128 }
129 aprint_normal_dev(sc->sc_dev, "interrupting at %s\n", intrstr);
130 sc->sc_has |= ATPPC_HAS_INTR;
131
132 /* setup DMA hooks */
133 if (atppc_puc_dma_setup(psc) == 0) {
134 sc->sc_has |= ATPPC_HAS_DMA;
135 sc->sc_dma_start = atppc_puc_dma_start;
136 sc->sc_dma_finish = atppc_puc_dma_finish;
137 sc->sc_dma_abort = atppc_puc_dma_abort;
138 sc->sc_dma_malloc = atppc_puc_dma_malloc;
139 sc->sc_dma_free = atppc_puc_dma_free;
140 }
141
142 /* Finished attach */
143 sc->sc_dev_ok = ATPPC_ATTACHED;
144
145 /* Run soft configuration attach */
146 atppc_sc_attach(sc);
147 }
148
149 /* Setup DMA structures */
150 static int
atppc_puc_dma_setup(struct atppc_puc_softc * psc)151 atppc_puc_dma_setup(struct atppc_puc_softc *psc)
152 {
153 return EOPNOTSUPP; /* XXX DMA not tested yet */
154 #if 0
155 struct atppc_softc *sc = (struct atppc_softc *)psc;
156 int error;
157
158 #define BUFSIZE PAGE_SIZE /* XXX see lptvar.h */
159 if ((error = bus_dmamap_create(sc->sc_dmat, BUFSIZE, 1, BUFSIZE, 0,
160 BUS_DMA_NOWAIT, &psc->sc_dmamap)))
161 return error;
162
163 return (0);
164 #endif
165 }
166
167 /* Start DMA operation over PCI bus */
168 static int
atppc_puc_dma_start(struct atppc_softc * sc,void * buf,u_int nbytes,u_int8_t mode)169 atppc_puc_dma_start(struct atppc_softc *sc, void *buf, u_int nbytes,
170 u_int8_t mode)
171 {
172 struct atppc_puc_softc *psc = (struct atppc_puc_softc *)sc;
173
174 bus_dmamap_sync(sc->sc_dmat, psc->sc_dmamap, 0, nbytes,
175 (mode == ATPPC_DMA_MODE_WRITE) ? BUS_DMASYNC_PREWRITE
176 : BUS_DMASYNC_PREREAD);
177
178 return (0);
179 }
180
181 /* Stop DMA operation over PCI bus */
182 static int
atppc_puc_dma_finish(struct atppc_softc * sc)183 atppc_puc_dma_finish(struct atppc_softc *sc)
184 {
185
186 struct atppc_puc_softc *psc = (struct atppc_puc_softc *)sc;
187
188 /*
189 * We don't know direction of DMA, so sync both. We can safely
190 * assume the dma map is loaded.
191 */
192 bus_dmamap_sync(sc->sc_dmat, psc->sc_dmamap, 0,
193 psc->sc_dmamap->dm_segs[0].ds_len,
194 BUS_DMASYNC_POSTWRITE|BUS_DMASYNC_POSTREAD);
195
196 return (0);
197 }
198
199 /* Abort DMA operation over PCI bus */
200 int
atppc_puc_dma_abort(struct atppc_softc * lsc)201 atppc_puc_dma_abort(struct atppc_softc * lsc)
202 {
203
204 /* Nothing to do - we do not need to sync, op is aborted */
205 return (0);
206 }
207
208 /* Allocate memory for DMA over PCI bus */
209 int
atppc_puc_dma_malloc(device_t dev,void ** buf,bus_addr_t * bus_addr,bus_size_t size)210 atppc_puc_dma_malloc(device_t dev, void **buf, bus_addr_t *bus_addr,
211 bus_size_t size)
212 {
213 struct atppc_puc_softc *psc = device_private(dev);
214 struct atppc_softc *sc = &psc->sc_atppc;
215 int error;
216
217 error = bus_dmamap_load(sc->sc_dmat, psc->sc_dmamap, *buf, size,
218 NULL /* kernel address */, BUS_DMA_WAITOK|BUS_DMA_STREAMING);
219 if (error)
220 return (error);
221
222 *bus_addr = psc->sc_dmamap->dm_segs[0].ds_addr;
223 return (0);
224 }
225
226 /* Free memory allocated by atppc_isa_dma_malloc() */
227 void
atppc_puc_dma_free(device_t dev,void ** buf,bus_addr_t * bus_addr,bus_size_t size)228 atppc_puc_dma_free(device_t dev, void **buf, bus_addr_t *bus_addr,
229 bus_size_t size)
230 {
231 struct atppc_puc_softc *psc = device_private(dev);
232 struct atppc_softc *sc = &psc->sc_atppc;
233
234 return (bus_dmamap_unload(sc->sc_dmat, psc->sc_dmamap));
235 }
236