1/*	$NetBSD: wzero3_mci.c,v 1.3 2011/07/19 15:37:39 dyoung Exp $	*/
2
3/*-
4 * Copyright (C) 2009 NONAKA Kimihiro <nonaka@netbsd.org>
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 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__KERNEL_RCSID(0, "$NetBSD: wzero3_mci.c,v 1.3 2011/07/19 15:37:39 dyoung Exp $");
30
31#include <sys/param.h>
32#include <sys/device.h>
33#include <sys/systm.h>
34#include <sys/pmf.h>
35#include <sys/bus.h>
36
37#include <machine/bootinfo.h>
38#include <machine/platid.h>
39#include <machine/platid_mask.h>
40
41#include <arm/xscale/pxa2x0cpu.h>
42#include <arm/xscale/pxa2x0reg.h>
43#include <arm/xscale/pxa2x0var.h>
44#include <arm/xscale/pxa2x0_gpio.h>
45#include <arm/xscale/pxa2x0_mci.h>
46
47#include <dev/sdmmc/sdmmcreg.h>
48
49#include <hpcarm/dev/wzero3_reg.h>
50
51#if defined(PXAMCI_DEBUG)
52#define	DPRINTF(s)	do { printf s; } while (0)
53#else
54#define	DPRINTF(s)	do {} while (0)
55#endif
56
57struct wzero3mci_softc {
58	struct pxamci_softc sc;
59
60	void *sc_detect_ih;
61	int sc_detect_pin;
62	int sc_power_pin;
63};
64
65static int pxamci_match(device_t, cfdata_t, void *);
66static void pxamci_attach(device_t, device_t, void *);
67
68CFATTACH_DECL_NEW(wzero3mci, sizeof(struct wzero3mci_softc),
69    pxamci_match, pxamci_attach, NULL, NULL);
70
71static int wzero3mci_intr(void *arg);
72
73static uint32_t	wzero3mci_get_ocr(void *);
74static int wzero3mci_set_power(void *, uint32_t);
75static int wzero3mci_card_detect(void *);
76static int wzero3mci_write_protect(void *);
77
78struct wzero3mci_model {
79	platid_mask_t *platid;
80	int detect_pin;	/* card detect pin# */
81	int power_pin;	/* card power pin # */
82} wzero3mci_table[] = {
83	/* WS003SH */
84	{
85		&platid_mask_MACH_SHARP_WZERO3_WS003SH,
86		GPIO_WS003SH_SD_DETECT,
87		GPIO_WS003SH_SD_POWER,
88	},
89	/* WS004SH */
90	{
91		&platid_mask_MACH_SHARP_WZERO3_WS004SH,
92		GPIO_WS003SH_SD_DETECT,
93		GPIO_WS003SH_SD_POWER,
94	},
95	/* WS007SH */
96	{
97		&platid_mask_MACH_SHARP_WZERO3_WS007SH,
98		GPIO_WS007SH_SD_DETECT,
99		GPIO_WS007SH_SD_POWER,
100	},
101	/* WS011SH */
102	{
103		&platid_mask_MACH_SHARP_WZERO3_WS011SH,
104		GPIO_WS011SH_SD_DETECT,
105		GPIO_WS011SH_SD_POWER,
106	},
107	/* WS0020H */
108	{
109		&platid_mask_MACH_SHARP_WZERO3_WS020SH,
110		GPIO_WS020SH_SD_DETECT,
111		GPIO_WS020SH_SD_POWER,
112	},
113
114	{
115		NULL, -1, -1
116	},
117};
118
119
120static const struct wzero3mci_model *
121wzero3mci_lookup(void)
122{
123	const struct wzero3mci_model *model;
124
125	for (model = wzero3mci_table; model->platid != NULL; model++) {
126		if (platid_match(&platid, model->platid)) {
127			return model;
128		}
129	}
130	return NULL;
131}
132
133static int
134pxamci_match(device_t parent, cfdata_t cf, void *aux)
135{
136
137	if (strcmp(cf->cf_name, "pxamci") != 0)
138		return 0;
139	if (wzero3mci_lookup() == NULL)
140		return 0;
141	return 1;
142}
143
144static void
145pxamci_attach(device_t parent, device_t self, void *aux)
146{
147	struct wzero3mci_softc *sc = device_private(self);
148	struct pxaip_attach_args *pxa = aux;
149	const struct wzero3mci_model *model;
150
151	sc->sc.sc_dev = self;
152
153	model = wzero3mci_lookup();
154	if (model == NULL) {
155		aprint_error(": Unknown model.");
156		return;
157	}
158
159	sc->sc_detect_pin = model->detect_pin;
160	sc->sc_power_pin = model->power_pin;
161
162	/* Establish SD detect interrupt */
163	if (sc->sc_detect_pin >= 0) {
164		pxa2x0_gpio_set_function(sc->sc_detect_pin, GPIO_IN);
165		sc->sc_detect_ih = pxa2x0_gpio_intr_establish(sc->sc_detect_pin,
166		    IST_EDGE_BOTH, IPL_BIO, wzero3mci_intr, sc);
167		if (sc->sc_detect_ih == NULL) {
168			aprint_error_dev(self,
169			    "unable to establish card detect interrupt\n");
170			return;
171		}
172	}
173
174	sc->sc.sc_tag.cookie = sc;
175	sc->sc.sc_tag.get_ocr = wzero3mci_get_ocr;
176	sc->sc.sc_tag.set_power = wzero3mci_set_power;
177	sc->sc.sc_tag.card_detect = wzero3mci_card_detect;
178	sc->sc.sc_tag.write_protect = wzero3mci_write_protect;
179	sc->sc.sc_caps = PMC_CAPS_4BIT;
180
181	if (pxamci_attach_sub(self, pxa)) {
182		aprint_error_dev(self, "unable to attach MMC controller\n");
183		goto free_intr;
184	}
185
186	if (!pmf_device_register(self, NULL, NULL)) {
187		aprint_error_dev(self, "couldn't establish power handler\n");
188	}
189
190	return;
191
192free_intr:
193	pxa2x0_gpio_intr_disestablish(sc->sc_detect_ih);
194	sc->sc_detect_ih = NULL;
195}
196
197static int
198wzero3mci_intr(void *arg)
199{
200	struct wzero3mci_softc *sc = (struct wzero3mci_softc *)arg;
201
202	pxa2x0_gpio_clear_intr(sc->sc_detect_pin);
203
204	pxamci_card_detect_event(&sc->sc);
205
206	return 1;
207}
208
209/*ARGSUSED*/
210static uint32_t
211wzero3mci_get_ocr(void *arg)
212{
213
214	return MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V;
215}
216
217static int
218wzero3mci_set_power(void *arg, uint32_t ocr)
219{
220	struct wzero3mci_softc *sc = (struct wzero3mci_softc *)arg;
221	int error = 0;
222
223	if (sc->sc_power_pin >= 0) {
224		if (ISSET(ocr, MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V)) {
225			/* power on */
226			pxa2x0_gpio_set_bit(sc->sc_power_pin);
227		} else if (ocr == 0) {
228			/* power off */
229			pxa2x0_gpio_clear_bit(sc->sc_power_pin);
230		} else {
231			aprint_error_dev(sc->sc.sc_dev,
232			    "unsupported OCR (%#x)\n", ocr);
233			error = EINVAL;
234		}
235	}
236	return error;
237}
238
239/*
240 * Return non-zero if the card is currently inserted.
241 */
242static int
243wzero3mci_card_detect(void *arg)
244{
245	struct wzero3mci_softc *sc = (struct wzero3mci_softc *)arg;
246
247	if (sc->sc_detect_pin >= 0) {
248		if (pxa2x0_gpio_get_bit(sc->sc_detect_pin))
249			return 0;
250	}
251	return 1;
252}
253
254/*
255 * Return non-zero if the card is currently write-protected.
256 */
257/*ARGSUSED*/
258static int
259wzero3mci_write_protect(void *arg)
260{
261
262	return 0;
263}
264