ipaq_atmelgpio.c revision 1.13 1 1.13 rjs /* $NetBSD: ipaq_atmelgpio.c,v 1.13 2006/09/28 09:03:46 rjs Exp $ */
2 1.1 ichiro
3 1.1 ichiro /*-
4 1.1 ichiro * Copyright (c) 2001 The NetBSD Foundation, Inc. All rights reserved.
5 1.1 ichiro *
6 1.1 ichiro * This code is derived from software contributed to The NetBSD Foundation
7 1.1 ichiro * by Ichiro FUKUHARA (ichiro (at) ichiro.org).
8 1.1 ichiro *
9 1.1 ichiro * Redistribution and use in source and binary forms, with or without
10 1.1 ichiro * modification, are permitted provided that the following conditions
11 1.1 ichiro * are met:
12 1.1 ichiro * 1. Redistributions of source code must retain the above copyright
13 1.1 ichiro * notice, this list of conditions and the following disclaimer.
14 1.1 ichiro * 2. Redistributions in binary form must reproduce the above copyright
15 1.1 ichiro * notice, this list of conditions and the following disclaimer in the
16 1.1 ichiro * documentation and/or other materials provided with the distribution.
17 1.1 ichiro * 3. All advertising materials mentioning features or use of this software
18 1.1 ichiro * must display the following acknowledgement:
19 1.1 ichiro * This product includes software developed by the NetBSD
20 1.1 ichiro * Foundation, Inc. and its contributors.
21 1.1 ichiro * 4. Neither the name of The NetBSD Foundation nor the names of its
22 1.1 ichiro * contributors may be used to endorse or promote products derived
23 1.1 ichiro * from this software without specific prior written permission.
24 1.1 ichiro *
25 1.1 ichiro * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
26 1.1 ichiro * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 1.1 ichiro * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 1.1 ichiro * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
29 1.1 ichiro * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 1.1 ichiro * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 1.1 ichiro * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 1.1 ichiro * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 1.1 ichiro * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 1.1 ichiro * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 1.1 ichiro * POSSIBILITY OF SUCH DAMAGE.
36 1.1 ichiro */
37 1.1 ichiro /*
38 1.1 ichiro * iPAQ uses Atmel microcontroller to service a few of peripheral devices.
39 1.1 ichiro * This controller connect to UART1 of SA11x0.
40 1.1 ichiro */
41 1.6 lukem
42 1.6 lukem #include <sys/cdefs.h>
43 1.13 rjs __KERNEL_RCSID(0, "$NetBSD: ipaq_atmelgpio.c,v 1.13 2006/09/28 09:03:46 rjs Exp $");
44 1.1 ichiro
45 1.1 ichiro #include <sys/param.h>
46 1.1 ichiro #include <sys/systm.h>
47 1.1 ichiro #include <sys/types.h>
48 1.1 ichiro #include <sys/conf.h>
49 1.1 ichiro #include <sys/file.h>
50 1.1 ichiro #include <sys/device.h>
51 1.1 ichiro #include <sys/kernel.h>
52 1.1 ichiro #include <sys/kthread.h>
53 1.1 ichiro #include <sys/malloc.h>
54 1.1 ichiro
55 1.1 ichiro #include <machine/bus.h>
56 1.1 ichiro
57 1.1 ichiro #include <hpcarm/dev/ipaq_saipvar.h>
58 1.1 ichiro #include <hpcarm/dev/ipaq_gpioreg.h>
59 1.1 ichiro #include <hpcarm/dev/ipaq_atmel.h>
60 1.2 ichiro #include <hpcarm/dev/ipaq_atmelvar.h>
61 1.11 peter
62 1.11 peter #include <arm/sa11x0/sa11x0_gpioreg.h>
63 1.11 peter #include <arm/sa11x0/sa11x0_comreg.h>
64 1.11 peter #include <arm/sa11x0/sa11x0_reg.h>
65 1.1 ichiro
66 1.2 ichiro #ifdef ATMEL_DEBUG
67 1.2 ichiro #define DPRINTF(x) printf x
68 1.2 ichiro #else
69 1.2 ichiro #define DPRINTF(x)
70 1.2 ichiro #endif
71 1.1 ichiro
72 1.1 ichiro static int atmelgpio_match(struct device *, struct cfdata *, void *);
73 1.1 ichiro static void atmelgpio_attach(struct device *, struct device *, void *);
74 1.1 ichiro static int atmelgpio_print(void *, const char *);
75 1.7 drochner static int atmelgpio_search(struct device *, struct cfdata *,
76 1.8 drochner const int *, void *);
77 1.1 ichiro static void atmelgpio_init(struct atmelgpio_softc *);
78 1.1 ichiro
79 1.2 ichiro static void rxtx_data(struct atmelgpio_softc *, int, int,
80 1.10 peter uint8_t *, struct atmel_rx *);
81 1.2 ichiro
82 1.5 thorpej CFATTACH_DECL(atmelgpio, sizeof(struct atmelgpio_softc),
83 1.5 thorpej atmelgpio_match, atmelgpio_attach, NULL, NULL);
84 1.1 ichiro
85 1.1 ichiro static int
86 1.13 rjs atmelgpio_match(struct device *parent, struct cfdata *cf, void *aux)
87 1.1 ichiro {
88 1.1 ichiro return (1);
89 1.1 ichiro }
90 1.1 ichiro
91 1.1 ichiro static void
92 1.13 rjs atmelgpio_attach(struct device *parent, struct device *self, void *aux)
93 1.1 ichiro {
94 1.1 ichiro struct atmelgpio_softc *sc = (struct atmelgpio_softc *)self;
95 1.1 ichiro struct ipaq_softc *psc = (struct ipaq_softc *)parent;
96 1.1 ichiro
97 1.11 peter struct atmel_rx rxbuf;
98 1.2 ichiro
99 1.1 ichiro printf("\n");
100 1.1 ichiro printf("%s: Atmel microcontroller GPIO\n", sc->sc_dev.dv_xname);
101 1.1 ichiro
102 1.1 ichiro sc->sc_iot = psc->sc_iot;
103 1.1 ichiro sc->sc_ioh = psc->sc_ioh;
104 1.1 ichiro sc->sc_parent = (struct ipaq_softc *)parent;
105 1.1 ichiro
106 1.1 ichiro if (bus_space_map(sc->sc_iot, SACOM1_BASE, SACOM_NPORTS, 0,
107 1.1 ichiro &sc->sc_ioh)) {
108 1.1 ichiro printf("%s: unable to map of UART1 registers\n", sc->sc_dev.dv_xname);
109 1.1 ichiro return;
110 1.1 ichiro }
111 1.1 ichiro
112 1.1 ichiro atmelgpio_init(sc);
113 1.1 ichiro
114 1.12 rjs rxbuf.idx = 0;
115 1.12 rjs rxbuf.len = 0;
116 1.12 rjs
117 1.2 ichiro #if 1 /* this is sample */
118 1.11 peter rxtx_data(sc, STATUS_BATTERY, 0, NULL, &rxbuf);
119 1.2 ichiro
120 1.11 peter printf("ac_status = %x\n", rxbuf.data[0]);
121 1.11 peter printf("Battery kind = %x\n", rxbuf.data[1]);
122 1.2 ichiro printf("Voltage = %d mV\n",
123 1.11 peter 1000 * (rxbuf.data[3] << 8 | rxbuf.data[2]) /228);
124 1.11 peter printf("Battery Status = %x\n", rxbuf.data[4]);
125 1.2 ichiro printf("Battery percentage = %d\n",
126 1.11 peter 425 * (rxbuf.data[3] << 8 | rxbuf.data[2]) /1000 - 298);
127 1.2 ichiro #endif
128 1.2 ichiro
129 1.13 rjs rxtx_data(sc, READ_IIC, 0, NULL, &rxbuf);
130 1.13 rjs
131 1.1 ichiro /*
132 1.1 ichiro * Attach each devices
133 1.1 ichiro */
134 1.1 ichiro
135 1.7 drochner config_search_ia(atmelgpio_search, self, "atmelgpioif", NULL);
136 1.1 ichiro }
137 1.1 ichiro
138 1.1 ichiro static int
139 1.13 rjs atmelgpio_search(struct device *parent, struct cfdata *cf, const int *ldesc,
140 1.13 rjs void *aux)
141 1.1 ichiro {
142 1.3 thorpej if (config_match(parent, cf, NULL) > 0)
143 1.1 ichiro config_attach(parent, cf, NULL, atmelgpio_print);
144 1.1 ichiro return 0;
145 1.1 ichiro }
146 1.1 ichiro
147 1.1 ichiro
148 1.1 ichiro static int
149 1.13 rjs atmelgpio_print(void *aux, const char *name)
150 1.1 ichiro {
151 1.1 ichiro return (UNCONF);
152 1.1 ichiro }
153 1.1 ichiro
154 1.1 ichiro static void
155 1.13 rjs atmelgpio_init(struct atmelgpio_softc *sc)
156 1.1 ichiro {
157 1.1 ichiro /* 8 bits no parity 1 stop bit */
158 1.1 ichiro bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR0, CR0_DSS);
159 1.1 ichiro
160 1.1 ichiro /* Set baud rate 115k */
161 1.1 ichiro bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR1, 0);
162 1.1 ichiro bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR2, SACOMSPEED(115200));
163 1.2 ichiro
164 1.2 ichiro /* RX/TX enable, RX/TX FIFO interrupt enable */
165 1.2 ichiro bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_CR3,
166 1.2 ichiro (CR3_RXE | CR3_TXE | CR3_RIE | CR3_TIE));
167 1.2 ichiro }
168 1.2 ichiro
169 1.2 ichiro static void
170 1.13 rjs rxtx_data(struct atmelgpio_softc *sc, int id, int size, uint8_t *buf,
171 1.13 rjs struct atmel_rx *rxbuf)
172 1.2 ichiro {
173 1.2 ichiro int i, checksum, length, rx_data;
174 1.10 peter uint8_t data[MAX_SENDSIZE];
175 1.2 ichiro
176 1.2 ichiro length = size + FRAME_OVERHEAD_SIZE;
177 1.2 ichiro
178 1.2 ichiro while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR0) & SR0_TFS))
179 1.2 ichiro ;
180 1.2 ichiro
181 1.10 peter data[0] = (uint8_t)FRAME_SOF;
182 1.10 peter data[1] = (uint8_t)((id << 4) | size);
183 1.2 ichiro checksum = data[1];
184 1.2 ichiro i = 2;
185 1.2 ichiro while (size--) {
186 1.2 ichiro data[i++] = *buf;
187 1.10 peter checksum += (uint8_t)(*buf++);
188 1.2 ichiro }
189 1.2 ichiro data[length-1] = checksum;
190 1.2 ichiro
191 1.2 ichiro while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR1) & SR1_TNF))
192 1.2 ichiro ;
193 1.2 ichiro i = 0;
194 1.2 ichiro while (i < length)
195 1.2 ichiro bus_space_write_4(sc->sc_iot, sc->sc_ioh, SACOM_DR, data[i++]);
196 1.2 ichiro
197 1.2 ichiro delay(10000);
198 1.2 ichiro #if 0
199 1.2 ichiro while (! (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR0) &
200 1.2 ichiro (SR0_RID | SR0_RFS)))
201 1.2 ichiro #endif
202 1.2 ichiro rxbuf->state = STATE_SOF;
203 1.2 ichiro while (bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_SR1) & SR1_RNE) {
204 1.2 ichiro
205 1.2 ichiro rx_data = bus_space_read_4(sc->sc_iot, sc->sc_ioh, SACOM_DR);
206 1.2 ichiro DPRINTF(("DATA = %x\n", rx_data));
207 1.2 ichiro
208 1.2 ichiro switch (rxbuf->state) {
209 1.2 ichiro case STATE_SOF:
210 1.2 ichiro if (rx_data == FRAME_SOF)
211 1.2 ichiro rxbuf->state = STATE_ID;
212 1.2 ichiro break;
213 1.2 ichiro case STATE_ID:
214 1.2 ichiro rxbuf->id = (rx_data & 0xf0) >> 4;
215 1.2 ichiro rxbuf->len = rx_data & 0x0f;
216 1.2 ichiro rxbuf->idx = 0;
217 1.2 ichiro rxbuf->checksum = rx_data;
218 1.2 ichiro rxbuf->state = (rxbuf->len > 0 ) ? STATE_DATA : STATE_EOF;
219 1.2 ichiro break;
220 1.2 ichiro case STATE_DATA:
221 1.2 ichiro rxbuf->checksum += rx_data;
222 1.2 ichiro rxbuf->data[rxbuf->idx] = rx_data;
223 1.2 ichiro if (++rxbuf->idx == rxbuf->len)
224 1.2 ichiro rxbuf->state = STATE_EOF;
225 1.2 ichiro break;
226 1.2 ichiro case STATE_EOF:
227 1.2 ichiro rxbuf->state = STATE_SOF;
228 1.2 ichiro if (rx_data == FRAME_EOF || rx_data == rxbuf->checksum)
229 1.2 ichiro DPRINTF(("frame EOF\n"));
230 1.2 ichiro else
231 1.2 ichiro DPRINTF(("BadFrame\n"));
232 1.2 ichiro break;
233 1.2 ichiro default:
234 1.2 ichiro break;
235 1.2 ichiro }
236 1.2 ichiro }
237 1.1 ichiro }
238