sio16.c revision 1.7 
1/*	$NetBSD: sio16.c,v 1.7 2002/09/27 15:37:32 provos Exp $	*/
2
3/*
4 * Copyright (c) 1998, 2001 Matthew R. Green
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 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 *    derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31/*
32 * aurora technologies nova16 driver.  this board is an sbus card with
33 * an external 16 port serial box.  there are two cirrus logic cd180
34 * 8 port serial chips used in the implementation.
35 *
36 * thanks go to Oliver Aldulea <oli@morcov.bv.ro> for writing the
37 * linux driver of this that helped clear up a couple of issues.
38 */
39
40#include <sys/cdefs.h>
41__KERNEL_RCSID(0, "$NetBSD: sio16.c,v 1.7 2002/09/27 15:37:32 provos Exp $");
42
43#include <sys/param.h>
44#include <sys/conf.h>
45#include <sys/device.h>
46#include <sys/systm.h>
47
48#include <machine/autoconf.h>
49
50#include <dev/ic/cd18xxvar.h>
51#include <dev/ic/cd18xxreg.h>
52
53#include "ioconf.h"
54#include "locators.h"
55
56/* 1600se configuration register bits */
57#define SIO16_CONFIGREG_ENABLE_IO    8
58#define SIO16_CONFIGREG_ENABLE_IRQ   4
59
60/* 1600se interrupt ackknowledge register bytes */
61#define	SIO16_MINT_ACK		1	/* modem interrupt acknowledge */
62#define	SIO16_TINT_ACK		2	/* tx interrupt acknowledge */
63#define	SIO16_RINT_ACK		3	/* rx interrupt acknowledge */
64
65/*
66 * device cfattach and cfdriver definitions, plus the routine we pass
67 * to the cd18xx code or interrupt acknowledgement.
68 */
69static int	sio16_match __P((struct device *, struct cfdata *, void *));
70static void	sio16_attach __P((struct device *, struct device *, void *));
71static u_char	sio16_ackfunc(void *, int who);
72
73/*
74 * define the sio16 per-device softc.
75 */
76struct sio16_softc {
77	struct device	sc_dev;			/* must be first */
78	struct sbusdev	sc_sd;			/* for sbus drivers */
79
80	/* sbus information */
81	bus_space_tag_t	sc_tag;			/* bus tag for below */
82	bus_space_handle_t sc_configreg;	/* configuration register */
83	bus_space_handle_t sc_reg[2];		/* cd180 register sets */
84	bus_space_handle_t sc_ack;		/* interrupt acknowledgement */
85#define	SIO16_1600SE	0x00000001
86
87	u_int           sc_clk;
88
89	/* cd180 information */
90	int		sc_ncd180;
91
92};
93
94struct cfattach siosixteen_ca = {
95	sizeof(struct sio16_softc), sio16_match, sio16_attach
96};
97
98struct sio16_attach_args {
99	bus_space_tag_t		cd_tag;
100	bus_space_handle_t	cd_handle;
101	u_char			(*cd_ackfunc)(void *, int);
102	void			*cd_ackfunc_arg;
103	u_int			cd_osc;
104};
105
106/*
107 * device match routine:  is there an sio16 present?
108 *
109 * note that we can not put "sio16" in the cfdriver, as this is an
110 * illegal name, so we have to hard code it here.
111 */
112#define	SIO16_ROM_NAME	"sio16"
113int
114sio16_match(parent, cf, aux)
115	struct device *parent;
116	struct cfdata *cf;
117	void   *aux;
118{
119	struct sbus_attach_args *sa = aux;
120
121	/* does the prom think i'm an sio16? */
122	if (strcmp(SIO16_ROM_NAME, sa->sa_name) != 0)
123		return (0);
124
125	return (1);
126}
127
128/*
129 * device attach routine:  go attach all sub devices.
130 */
131void
132sio16_attach(parent, self, aux)
133	struct device *parent, *self;
134	void   *aux;
135{
136	struct sbus_attach_args *sa = aux;
137	struct sio16_softc *sc = (struct sio16_softc *)self;
138	bus_space_handle_t h;
139	char *mode, *model;
140	int i;
141
142	if (sa->sa_nreg != 4)
143		panic("sio16_attach: got %d registers intead of 4",
144		    sa->sa_nreg);
145
146	/* copy our bus tag, we will need it */
147	sc->sc_tag = sa->sa_bustag;
148
149	/*
150	 * sio16 has 4 register mappings.  a single byte configuration
151	 * register, 2 128 byte regions for the cd180 registers, and
152	 * a 4 byte region for interrupt acknowledgement.
153	 */
154	if (sbus_bus_map(sa->sa_bustag,
155			 sa->sa_reg[0].oa_space,
156			 sa->sa_reg[0].oa_base,
157			 sa->sa_reg[0].oa_size,
158			 0, &h) != 0) {
159		printf("%s at sbus: can not map registers 0\n",
160		    self->dv_xname);
161		return;
162	}
163	sc->sc_configreg = h;
164	if (sbus_bus_map(sa->sa_bustag,
165			 sa->sa_reg[1].sbr_slot,
166			 sa->sa_reg[1].sbr_offset,
167			 sa->sa_reg[1].sbr_size,
168			 0, &h) != 0) {
169		printf("%s at sbus: can not map registers 1\n",
170		    self->dv_xname);
171		return;
172	}
173	sc->sc_reg[0] = h;
174	if (sbus_bus_map(sa->sa_bustag,
175			 sa->sa_reg[2].sbr_slot,
176			 sa->sa_reg[2].sbr_offset,
177			 sa->sa_reg[2].sbr_size,
178			 0, &h) != 0) {
179		printf("%s at sbus: can not map registers 2\n",
180		    self->dv_xname);
181		return;
182	}
183	sc->sc_reg[1] = h;
184	if (sbus_bus_map(sa->sa_bustag,
185			 sa->sa_reg[3].sbr_slot,
186			 sa->sa_reg[3].sbr_offset,
187			 sa->sa_reg[3].sbr_size,
188			 0, &h) != 0) {
189		printf("%s at sbus: can not map registers 3\n",
190		    self->dv_xname);
191		return;
192	}
193	sc->sc_ack = h;
194
195	mode = PROM_getpropstring(sa->sa_node, "mode");
196	if (mode)
197		printf(", %s mode", mode);
198
199	/* get the clock frequency */
200	sc->sc_clk = PROM_getpropint(sa->sa_node, "clk", 24000);
201
202	model = PROM_getpropstring(sa->sa_node, "model");
203	if (model == 0) {
204		printf(", no model property, bailing\n");
205		return;
206	}
207
208	/* are we an 1600se? */
209	if (strcmp(model, "1600se") == 0) {
210		printf(", 16 channels");
211		sc->sc_ncd180 = 2;
212	} else {
213		printf(", don't know model %s, bailing\n", model);
214		return;
215	}
216
217	/* set up our sbus connections */
218	sbus_establish(&sc->sc_sd, &sc->sc_dev);
219
220	/* establish interrupt channel */
221	(void)bus_intr_establish(sa->sa_bustag, sa->sa_pri, IPL_TTY, 0,
222	    cd18xx_hardintr, sc);
223
224	/* reset the board, and turn on interrupts and I/O */
225	bus_space_write_1(sa->sa_bustag, sc->sc_configreg, 0, 0);
226	delay(100);
227	bus_space_write_1(sa->sa_bustag, sc->sc_configreg, 0,
228	    SIO16_CONFIGREG_ENABLE_IO | SIO16_CONFIGREG_ENABLE_IRQ |
229	    (((sa->sa_pri) & 0x0f) >> 2));
230	delay(10000);
231
232	printf("\n");
233
234	/* finally, configure the clcd's underneath */
235	for (i = 0; i < sc->sc_ncd180; i++) {
236		struct sio16_attach_args cd;
237
238		cd.cd_tag = sa->sa_bustag;
239		cd.cd_osc = sc->sc_clk * 100;
240		cd.cd_handle = (bus_space_handle_t)sc->sc_reg[i];
241		cd.cd_ackfunc = sio16_ackfunc;
242		cd.cd_ackfunc_arg = sc;
243		(void)config_found(self, (void *)&cd, NULL);
244	}
245}
246
247/*
248 * note that the addresses used in this function match those assigned
249 * in clcd_attach() below, or the various service match routines.
250 */
251u_char
252sio16_ackfunc(v, who)
253	void *v;
254	int who;
255{
256	struct sio16_softc *sc = v;
257	bus_size_t addr;
258
259	switch (who) {
260	case CD18xx_INTRACK_RxINT:
261	case CD18xx_INTRACK_REINT:
262		addr = SIO16_RINT_ACK;
263		break;
264	case CD18xx_INTRACK_TxINT:
265		addr = SIO16_TINT_ACK;
266		break;
267	case CD18xx_INTRACK_MxINT:
268		addr = SIO16_MINT_ACK;
269		break;
270	default:
271		panic("%s: sio16_ackfunc: unknown ackfunc %d",
272		    sc->sc_dev.dv_xname, who);
273	}
274	return (bus_space_read_1(sc->sc_tag, sc->sc_ack, addr));
275}
276
277/*
278 * we attach two `clcd' instances per 1600se, that each call the
279 * backend cd18xx driver for help.
280 */
281static int	clcd_match(struct device *, struct cfdata *, void *);
282static void	clcd_attach(struct device *, struct device *, void *);
283
284struct cfattach clcd_ca = {
285	sizeof(struct cd18xx_softc), clcd_match, clcd_attach
286};
287
288static int
289clcd_match(parent, cf, aux)
290	struct device *parent;
291	struct cfdata *cf;
292	void *aux;
293{
294
295	/* XXX */
296	return 1;
297}
298
299static void
300clcd_attach(parent, self, aux)
301	struct device *parent, *self;
302	void *aux;
303{
304	struct cd18xx_softc *sc = (struct cd18xx_softc *)self;
305	struct sio16_attach_args *args = aux;
306
307	sc->sc_tag = args->cd_tag;
308	sc->sc_handle = args->cd_handle;
309	sc->sc_osc = args->cd_osc;
310	sc->sc_ackfunc = args->cd_ackfunc;
311	sc->sc_ackfunc_arg = args->cd_ackfunc_arg;
312	sc->sc_msmr = SIO16_MINT_ACK;
313	sc->sc_tsmr = SIO16_TINT_ACK;
314	sc->sc_rsmr = SIO16_RINT_ACK;
315
316	/* call the common code */
317	cd18xx_attach(sc);
318}
319