1 /* $NetBSD: j720kbd.c,v 1.8 2021/08/07 16:18:53 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2006 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by IWAMOTO Toshihiro and Peter Postma.
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 /* Jornada 720 keyboard driver. */
33
34 #include <sys/cdefs.h>
35 __KERNEL_RCSID(0, "$NetBSD: j720kbd.c,v 1.8 2021/08/07 16:18:53 thorpej Exp $");
36
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/device.h>
40 #include <sys/kernel.h>
41
42 #include <machine/bootinfo.h>
43 #include <machine/config_hook.h>
44 #include <machine/platid.h>
45 #include <machine/platid_mask.h>
46
47 #include <arm/sa11x0/sa11x0_var.h>
48 #include <arm/sa11x0/sa11x0_gpioreg.h>
49 #include <arm/sa11x0/sa11x0_ppcreg.h>
50 #include <arm/sa11x0/sa11x0_sspreg.h>
51
52 #include <dev/hpc/hpckbdvar.h>
53
54 #include <hpcarm/dev/j720sspvar.h>
55
56 #ifdef DEBUG
57 #define DPRINTF(arg) aprint_normal arg
58 #else
59 #define DPRINTF(arg) /* nothing */
60 #endif
61
62 struct j720kbd_chip {
63 int scc_enabled;
64
65 struct j720ssp_softc *scc_ssp;
66
67 struct hpckbd_ic_if scc_if;
68 struct hpckbd_if *scc_hpckbd;
69 };
70
71 struct j720kbd_softc {
72 device_t sc_dev;
73
74 struct j720kbd_chip *sc_chip;
75 };
76
77 static struct j720kbd_chip j720kbd_chip;
78
79 static int j720kbd_match(device_t, cfdata_t, void *);
80 static void j720kbd_attach(device_t, device_t, void *);
81
82 static void j720kbd_cnattach(void);
83 static void j720kbd_ifsetup(struct j720kbd_chip *);
84 static int j720kbd_input_establish(void *, struct hpckbd_if *);
85 static int j720kbd_intr(void *);
86 static int j720kbd_poll(void *);
87 static void j720kbd_read(struct j720kbd_chip *, char *);
88
89 CFATTACH_DECL_NEW(j720kbd, sizeof(struct j720kbd_softc),
90 j720kbd_match, j720kbd_attach, NULL, NULL);
91
92
93 static int
j720kbd_match(device_t parent,cfdata_t cf,void * aux)94 j720kbd_match(device_t parent, cfdata_t cf, void *aux)
95 {
96
97 if (!platid_match(&platid, &platid_mask_MACH_HP_JORNADA_7XX))
98 return 0;
99 if (strcmp(cf->cf_name, "j720kbd") != 0)
100 return 0;
101
102 return 1;
103 }
104
105 static void
j720kbd_attach(device_t parent,device_t self,void * aux)106 j720kbd_attach(device_t parent, device_t self, void *aux)
107 {
108 struct j720kbd_softc *sc = device_private(self);
109 struct hpckbd_attach_args haa;
110
111 aprint_normal("\n");
112
113 sc->sc_dev = self;
114 sc->sc_chip = &j720kbd_chip;
115 sc->sc_chip->scc_ssp = device_private(parent);
116 sc->sc_chip->scc_enabled = 0;
117
118 /* Attach console if not using serial. */
119 if (!(bootinfo->bi_cnuse & BI_CNUSE_SERIAL))
120 j720kbd_cnattach();
121
122 j720kbd_ifsetup(sc->sc_chip);
123
124 /* Install interrupt handler. */
125 sa11x0_intr_establish(0, 0, 1, IPL_TTY, j720kbd_intr, sc);
126
127 /* Attach hpckbd. */
128 haa.haa_ic = &sc->sc_chip->scc_if;
129 config_found(self, &haa, hpckbd_print, CFARGS_NONE);
130 }
131
132 static void
j720kbd_cnattach(void)133 j720kbd_cnattach(void)
134 {
135 struct j720kbd_chip *scc = &j720kbd_chip;
136
137 /* Initialize interface. */
138 j720kbd_ifsetup(scc);
139
140 /* Attach console. */
141 hpckbd_cnattach(&scc->scc_if);
142 }
143
144 static void
j720kbd_ifsetup(struct j720kbd_chip * scc)145 j720kbd_ifsetup(struct j720kbd_chip *scc)
146 {
147
148 scc->scc_if.hii_ctx = scc;
149 scc->scc_if.hii_establish = j720kbd_input_establish;
150 scc->scc_if.hii_poll = j720kbd_poll;
151 }
152
153 static int
j720kbd_input_establish(void * ic,struct hpckbd_if * kbdif)154 j720kbd_input_establish(void *ic, struct hpckbd_if *kbdif)
155 {
156 struct j720kbd_chip *scc = ic;
157
158 /* Save hpckbd interface. */
159 scc->scc_hpckbd = kbdif;
160
161 scc->scc_enabled = 1;
162
163 return 0;
164 }
165
166 static int
j720kbd_intr(void * arg)167 j720kbd_intr(void *arg)
168 {
169 struct j720kbd_softc *sc = arg;
170 struct j720ssp_softc *ssp = sc->sc_chip->scc_ssp;
171
172 bus_space_write_4(ssp->sc_iot, ssp->sc_gpioh, SAGPIO_EDR, 1);
173
174 return j720kbd_poll(sc->sc_chip);
175 }
176
177 static int
j720kbd_poll(void * arg)178 j720kbd_poll(void *arg)
179 {
180 struct j720kbd_chip *scc = arg;
181 int type, key;
182 char buf[9], *p;
183
184 if (!scc->scc_enabled) {
185 DPRINTF(("j720kbd_poll: !scc_enabled\n"));
186 return 0;
187 }
188
189 j720kbd_read(scc, buf);
190
191 for (p = buf; *p; p++) {
192 type = *p & 0x80 ? 0 : 1;
193 key = *p & 0x7f;
194
195 hpckbd_input(scc->scc_hpckbd, type, key);
196 }
197
198 return 1;
199 }
200
201 static void
j720kbd_read(struct j720kbd_chip * scc,char * buf)202 j720kbd_read(struct j720kbd_chip *scc, char *buf)
203 {
204 struct j720ssp_softc *ssp = scc->scc_ssp;
205 int data, count;
206
207 bus_space_write_4(ssp->sc_iot, ssp->sc_gpioh, SAGPIO_PCR, 0x2000000);
208
209 /* Send scan keycode command. */
210 if (j720ssp_readwrite(ssp, 1, 0x90, &data, 500) < 0 || data != 0x11) {
211 DPRINTF(("j720kbd_read: no dummy received\n"));
212 goto out;
213 }
214
215 /* Read number of scancodes available. */
216 if (j720ssp_readwrite(ssp, 0, 0x11, &data, 500) < 0) {
217 DPRINTF(("j720kbd_read: unable to read number of scancodes\n"));
218 goto out;
219 }
220 count = data;
221
222 for (; count; count--) {
223 if (j720ssp_readwrite(ssp, 0, 0x11, &data, 100) < 0)
224 goto out;
225 *buf++ = data;
226 }
227 *buf = 0;
228 bus_space_write_4(ssp->sc_iot, ssp->sc_gpioh, SAGPIO_PSR, 0x2000000);
229
230 return;
231
232 out:
233 *buf = 0;
234 bus_space_write_4(ssp->sc_iot, ssp->sc_gpioh, SAGPIO_PSR, 0x2000000);
235
236 /* reset SSP */
237 bus_space_write_4(ssp->sc_iot, ssp->sc_ssph, SASSP_CR0, 0x307);
238 delay(100);
239 bus_space_write_4(ssp->sc_iot, ssp->sc_ssph, SASSP_CR0, 0x387);
240
241 DPRINTF(("j720kbd_read: error %x\n", data));
242 }
243