1 /* $NetBSD: clmpcc_pcctwo.c,v 1.20 2014/03/25 15:52:16 christos Exp $ */
2
3 /*-
4 * Copyright (c) 1999, 2002 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Steve C. Woodford.
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 /*
33 * Cirrus Logic CD2401 4-channel serial chip. PCCchip2 Front-end.
34 */
35
36 #include <sys/cdefs.h>
37 __KERNEL_RCSID(0, "$NetBSD: clmpcc_pcctwo.c,v 1.20 2014/03/25 15:52:16 christos Exp $");
38
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/proc.h>
42 #include <sys/device.h>
43 #include <sys/conf.h>
44 #include <sys/file.h>
45 #include <sys/ioctl.h>
46 #include <sys/tty.h>
47 #include <sys/time.h>
48 #include <sys/kernel.h>
49 #include <sys/syslog.h>
50
51 #include <dev/cons.h>
52
53 #include <sys/cpu.h>
54 #include <sys/bus.h>
55 #include <sys/intr.h>
56
57 #include <dev/ic/clmpccvar.h>
58
59 #include <dev/mvme/pcctwovar.h>
60 #include <dev/mvme/pcctworeg.h>
61
62 /* XXXXSCW: Fixme */
63 #ifdef MVME68K
64 #include <mvme68k/dev/mainbus.h>
65 #else
66 #error Need consiack hook
67 #endif
68
69
70 /* Definition of the driver for autoconfig. */
71 int clmpcc_pcctwo_match(device_t, cfdata_t, void *);
72 void clmpcc_pcctwo_attach(device_t, device_t, void *);
73 void clmpcc_pcctwo_iackhook(struct clmpcc_softc *, int);
74 void clmpcc_pcctwo_consiackhook(struct clmpcc_softc *, int);
75
76 CFATTACH_DECL_NEW(clmpcc_pcctwo, sizeof(struct clmpcc_softc),
77 clmpcc_pcctwo_match, clmpcc_pcctwo_attach, NULL, NULL);
78
79 extern struct cfdriver clmpcc_cd;
80
81 extern const struct cdevsw clmpcc_cdevsw;
82
83 /*
84 * For clmpcccn*()
85 */
86 cons_decl(clmpcc);
87
88
89 /*
90 * Is the CD2401 chip present?
91 */
92 int
clmpcc_pcctwo_match(device_t parent,cfdata_t cf,void * aux)93 clmpcc_pcctwo_match(device_t parent, cfdata_t cf, void *aux)
94 {
95 struct pcctwo_attach_args *pa;
96
97 pa = aux;
98
99 if (strcmp(pa->pa_name, clmpcc_cd.cd_name))
100 return (0);
101
102 pa->pa_ipl = cf->pcctwocf_ipl;
103
104 return (1);
105 }
106
107 /*
108 * Attach a found CD2401.
109 */
110 void
clmpcc_pcctwo_attach(device_t parent,device_t self,void * aux)111 clmpcc_pcctwo_attach(device_t parent, device_t self, void *aux)
112 {
113 struct clmpcc_softc *sc;
114 struct pcctwo_attach_args *pa = aux;
115 int level = pa->pa_ipl;
116
117 sc = device_private(self);
118 sc->sc_dev = self;
119 level = pa->pa_ipl;
120 sc->sc_iot = pa->pa_bust;
121 bus_space_map(pa->pa_bust, pa->pa_offset, 0x100, 0, &sc->sc_ioh);
122
123 sc->sc_clk = 20000000;
124 sc->sc_byteswap = CLMPCC_BYTESWAP_LOW;
125 sc->sc_swaprtsdtr = 1;
126 sc->sc_iackhook = clmpcc_pcctwo_iackhook;
127 sc->sc_vector_base = PCCTWO_SCC_VECBASE;
128 sc->sc_rpilr = 0x03;
129 sc->sc_tpilr = 0x02;
130 sc->sc_mpilr = 0x01;
131 sc->sc_evcnt = pcctwointr_evcnt(level);
132
133 /* Do common parts of CD2401 configuration. */
134 clmpcc_attach(sc);
135
136 /* Hook the interrupts */
137 pcctwointr_establish(PCCTWOV_SCC_RX, clmpcc_rxintr, level, sc, NULL);
138 pcctwointr_establish(PCCTWOV_SCC_RX_EXCEP, clmpcc_rxintr, level, sc,
139 NULL);
140 pcctwointr_establish(PCCTWOV_SCC_TX, clmpcc_txintr, level, sc, NULL);
141 pcctwointr_establish(PCCTWOV_SCC_MODEM, clmpcc_mdintr, level, sc, NULL);
142 }
143
144 void
clmpcc_pcctwo_iackhook(struct clmpcc_softc * sc,int which)145 clmpcc_pcctwo_iackhook(struct clmpcc_softc *sc, int which)
146 {
147 bus_size_t offset;
148 volatile u_char foo;
149
150 switch (which) {
151 case CLMPCC_IACK_MODEM:
152 offset = PCC2REG_SCC_MODEM_PIACK;
153 break;
154
155 case CLMPCC_IACK_RX:
156 offset = PCC2REG_SCC_RX_PIACK;
157 break;
158
159 case CLMPCC_IACK_TX:
160 offset = PCC2REG_SCC_TX_PIACK;
161 break;
162 default:
163 #ifdef DEBUG
164 printf("%s: Invalid IACK number '%d'\n",
165 device_xname(sc->sc_dev), which);
166 #endif
167 panic("clmpcc_pcctwo_iackhook %d", which);
168 }
169
170 foo = pcc2_reg_read(sys_pcctwo, offset);
171 __USE(foo);
172 }
173
174 /*
175 * This routine is only used prior to clmpcc_attach() being called
176 */
177 void
clmpcc_pcctwo_consiackhook(struct clmpcc_softc * sc,int which)178 clmpcc_pcctwo_consiackhook(struct clmpcc_softc *sc, int which)
179 {
180 bus_space_handle_t bush;
181 bus_size_t offset;
182 volatile u_char foo;
183
184 switch (which) {
185 case CLMPCC_IACK_MODEM:
186 offset = PCC2REG_SCC_MODEM_PIACK;
187 break;
188
189 case CLMPCC_IACK_RX:
190 offset = PCC2REG_SCC_RX_PIACK;
191 break;
192
193 case CLMPCC_IACK_TX:
194 offset = PCC2REG_SCC_TX_PIACK;
195 break;
196 default:
197 #ifdef DEBUG
198 printf("%s: Invalid IACK number '%d'\n",
199 device_xname(sc->sc_dev), which);
200 panic("clmpcc_pcctwo_consiackhook");
201 #endif
202 panic("clmpcc_pcctwo_iackhook %d", which);
203 }
204
205 #ifdef MVME68K
206 /*
207 * We need to fake the tag and handle since 'sys_pcctwo' will
208 * be NULL during early system startup...
209 */
210 bush = (bus_space_handle_t) & (intiobase[MAINBUS_PCCTWO_OFFSET +
211 PCCTWO_REG_OFF]);
212
213 foo = bus_space_read_1(&_mainbus_space_tag, bush, offset);
214 __USE(foo);
215 #else
216 #error Need consiack hook
217 #endif
218 }
219
220
221 /****************************************************************
222 * Console support functions (MVME PCCchip2 specific!)
223 ****************************************************************/
224
225 /*
226 * Check for CD2401 console.
227 */
228 void
clmpcccnprobe(struct consdev * cp)229 clmpcccnprobe(struct consdev *cp)
230 {
231 int maj;
232
233 #if defined(MVME68K)
234 if (machineid != MVME_167 && machineid != MVME_177)
235 #elif defined(MVME88K)
236 if (machineid != MVME_187)
237 #endif
238 {
239 cp->cn_pri = CN_DEAD;
240 return;
241 }
242
243 /*
244 * Locate the major number
245 */
246 maj = cdevsw_lookup_major(&clmpcc_cdevsw);
247
248 /* Initialize required fields. */
249 cp->cn_dev = makedev(maj, 0);
250 cp->cn_pri = CN_NORMAL;
251 }
252
253 void
clmpcccninit(struct consdev * cp)254 clmpcccninit(struct consdev *cp)
255 {
256 static struct clmpcc_softc cons_sc;
257
258 cons_sc.sc_iot = &_mainbus_space_tag;
259 bus_space_map(&_mainbus_space_tag,
260 intiobase_phys + MAINBUS_PCCTWO_OFFSET + PCCTWO_SCC_OFF,
261 PCC2REG_SIZE, 0, &cons_sc.sc_ioh);
262 cons_sc.sc_clk = 20000000;
263 cons_sc.sc_byteswap = CLMPCC_BYTESWAP_LOW;
264 cons_sc.sc_swaprtsdtr = 1;
265 cons_sc.sc_iackhook = clmpcc_pcctwo_consiackhook;
266 cons_sc.sc_vector_base = PCCTWO_SCC_VECBASE;
267 cons_sc.sc_rpilr = 0x03;
268 cons_sc.sc_tpilr = 0x02;
269 cons_sc.sc_mpilr = 0x01;
270
271 clmpcc_cnattach(&cons_sc, 0, 9600);
272 }
273