psh3pwr.c revision 1.2 
1/*	$NetBSD: psh3pwr.c,v 1.2 2007/09/24 18:08:53 kiyohara Exp $	*/
2/*
3 * Copyright (c) 2005, 2007 KIYOHARA Takashi
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
19 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
23 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
24 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25 * POSSIBILITY OF SUCH DAMAGE.
26 *
27 */
28
29#include <sys/cdefs.h>
30__KERNEL_RCSID(0, "$NetBSD: psh3pwr.c,v 1.2 2007/09/24 18:08:53 kiyohara Exp $");
31
32#include <sys/param.h>
33#include <sys/kernel.h>
34#include <sys/device.h>
35#include <sys/systm.h>
36#include <sys/callout.h>
37
38#include <machine/config_hook.h>
39#include <machine/platid.h>
40#include <machine/platid_mask.h>
41
42#include <dev/apm/apmbios.h>
43
44#include <sh3/exception.h>
45#include <sh3/intcreg.h>
46#include <sh3/pfcreg.h>
47
48#include <sh3/dev/adcvar.h>
49
50
51#ifdef PSH3PWR_DEBUG
52#define DPRINTF(arg)            printf arg
53#else
54#define DPRINTF(arg)            ((void)0)
55#endif
56
57
58/* A/D covnerter channels to get power stats from */
59#define ADC_CHANNEL_BATTERY	3
60
61/* On/Off bit for Green LED. pin 7 in SH7709 GPIO port H. */
62#define PSH3_GREEN_LED_ON	0x80
63
64/*
65 * XXXX:
66 *   WindowsCE seem to be using this as a flag.
67 *   pin 6 in SH7709 GPIO port SCPDR.
68 */
69#define PSH3PWR_PLUG_OUT	0x40
70
71
72static inline int __attribute__((__always_inline__))
73psh3pwr_ac_is_off(void)
74{
75
76	return _reg_read_1(SH7709_SCPDR) & PSH3PWR_PLUG_OUT;
77}
78
79
80/*
81 * Empirical range of battery values.
82 * Thanks to Joseph Heenan for measurements.
83 */
84#define PSH3PWR_BATTERY_MIN		630
85#define PSH3PWR_BATTERY_CRITICAL	635
86#define PSH3PWR_BATTERY_LOW		645
87#define PSH3PWR_BATTERY_FULL		910 /* can be slightly more */
88
89
90struct psh3pwr_softc {
91	struct device sc_dev;
92
93	void *sc_ih_pin;
94	void *sc_ih_pout;
95};
96
97static int psh3pwr_match(struct device *, struct cfdata *, void *);
98static void psh3pwr_attach(struct device *, struct device *, void *);
99
100CFATTACH_DECL(psh3pwr, sizeof(struct psh3pwr_softc),
101    psh3pwr_match, psh3pwr_attach, NULL, NULL);
102
103static int psh3pwr_intr_plug_out(void *);
104static int psh3pwr_intr_plug_in(void *);
105static void psh3pwr_sleep(void *);
106static int psh3pwr_apm_getpower_hook(void *, int, long, void *);
107static int psh3pwr_get_battery(void);
108
109
110static int
111psh3pwr_match(struct device *parent, struct cfdata *cfp, void *aux)
112{
113
114	if (!platid_match(&platid, &platid_mask_MACH_HITACHI_PERSONA))
115		return 0;
116
117	if (strcmp(cfp->cf_name, "psh3pwr") != 0)
118		return 0;
119
120	return 1;
121}
122
123
124static void
125psh3pwr_attach(struct device *parent, struct device *self, void *aux)
126{
127	extern void (*__sleep_func)(void *);
128	extern void *__sleep_ctx;
129	struct psh3pwr_softc *sc = (struct psh3pwr_softc *)self;
130	uint8_t phdr;
131
132	/* arrange for hpcapm to call us when power status is requested */
133	config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_ACADAPTER,
134	    CONFIG_HOOK_EXCLUSIVE, psh3pwr_apm_getpower_hook, sc);
135	config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_CHARGE,
136	    CONFIG_HOOK_EXCLUSIVE, psh3pwr_apm_getpower_hook, sc);
137	config_hook(CONFIG_HOOK_GET, CONFIG_HOOK_BATTERYVAL,
138	    CONFIG_HOOK_EXCLUSIVE, psh3pwr_apm_getpower_hook, sc);
139
140	/* regisiter sleep function to APM */
141	__sleep_func = psh3pwr_sleep;
142	__sleep_ctx = self;
143
144	phdr = _reg_read_1(SH7709_PHDR);
145	_reg_write_1(SH7709_PHDR, phdr | PSH3_GREEN_LED_ON);
146
147	printf("\n");
148
149	sc->sc_ih_pout = intc_intr_establish(SH7709_INTEVT2_IRQ0,
150	    IST_EDGE, IPL_TTY, psh3pwr_intr_plug_out, sc);
151	sc->sc_ih_pin = intc_intr_establish(SH7709_INTEVT2_IRQ1,
152	    IST_EDGE, IPL_TTY, psh3pwr_intr_plug_in, sc);
153
154	/* XXXX: WindowsCE sets this bit. */
155	printf("%s: plug status: %s\n",
156	    device_xname(&sc->sc_dev), psh3pwr_ac_is_off() ? "out" : "in");
157}
158
159
160static int
161psh3pwr_intr_plug_out(void *self)
162{
163	struct psh3pwr_softc *sc __attribute__((__unused__)) =
164	    (struct psh3pwr_softc *)self;
165	uint8_t irr0, scpdr;
166
167	irr0 = _reg_read_1(SH7709_IRR0);
168	if (!(irr0 & IRR0_IRQ0)) {
169		return 0;
170	}
171	_reg_write_1(SH7709_IRR0, irr0 & ~IRR0_IRQ0);
172
173	/* XXXX: WindowsCE sets this bit. */
174	scpdr = _reg_read_1(SH7709_SCPDR);
175	_reg_write_1(SH7709_SCPDR, scpdr | PSH3PWR_PLUG_OUT);
176
177	DPRINTF(("%s: plug out\n", device_xname(&sc->sc_dev)));
178
179	return 1;
180}
181
182static int
183psh3pwr_intr_plug_in(void *self)
184{
185	struct psh3pwr_softc *sc __attribute__((__unused__)) =
186	    (struct psh3pwr_softc *)self;
187	uint8_t irr0, scpdr;
188
189	irr0 = _reg_read_1(SH7709_IRR0);
190	if (!(irr0 & IRR0_IRQ1))
191		return 0;
192	_reg_write_1(SH7709_IRR0, irr0 & ~IRR0_IRQ1);
193
194	/* XXXX: WindowsCE sets this bit. */
195	scpdr = _reg_read_1(SH7709_SCPDR);
196	_reg_write_1(SH7709_SCPDR, scpdr & ~PSH3PWR_PLUG_OUT);
197
198	DPRINTF(("%s: plug in\n", device_xname(&sc->sc_dev)));
199
200	return 1;
201}
202
203void
204psh3pwr_sleep(void *self)
205{
206	/* splhigh on entry */
207	extern void pfckbd_poll_hitachi_power(void);
208
209	uint8_t phdr;
210
211	phdr = _reg_read_1(SH7709_PHDR);
212	_reg_write_1(SH7709_PHDR, phdr & ~PSH3_GREEN_LED_ON);
213
214	pfckbd_poll_hitachi_power();
215
216	phdr = _reg_read_1(SH7709_PHDR);
217	_reg_write_1(SH7709_PHDR, phdr | PSH3_GREEN_LED_ON);
218}
219
220static int
221psh3pwr_apm_getpower_hook(void *ctx, int type, long id, void *msg)
222{
223	/* struct psh0pwr_softc * const sc = ctx; */
224	int * const pval = msg;
225	int battery, state;
226
227	if (type != CONFIG_HOOK_GET)
228		return EINVAL;
229
230	switch (id) {
231
232	case CONFIG_HOOK_ACADAPTER:
233		*pval = psh3pwr_ac_is_off() ? APM_AC_OFF : APM_AC_ON;
234		return 0;
235
236	case CONFIG_HOOK_CHARGE:
237		battery = psh3pwr_get_battery();
238		if (battery < PSH3PWR_BATTERY_CRITICAL)
239			state = APM_BATT_FLAG_CRITICAL;
240		else if (battery < PSH3PWR_BATTERY_LOW)
241			state = APM_BATT_FLAG_LOW;
242		else
243			state = APM_BATT_FLAG_HIGH; /* XXX? */
244		*pval = state;
245		return 0;
246
247	case CONFIG_HOOK_BATTERYVAL:
248		battery = psh3pwr_get_battery();
249		if (battery > PSH3PWR_BATTERY_FULL)
250			state = 100;
251		else
252			state = 100 * (battery - PSH3PWR_BATTERY_MIN) /
253			    (PSH3PWR_BATTERY_FULL - PSH3PWR_BATTERY_MIN);
254		*pval = state;
255		return 0;
256	}
257
258	return EINVAL;
259}
260
261
262static int
263psh3pwr_get_battery(void)
264{
265	int battery;
266	int s;
267
268	s = spltty();
269	battery = adc_sample_channel(ADC_CHANNEL_BATTERY);
270	splx(s);
271
272	return battery;
273}
274