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wzero3_mci.c revision 1.4
      1  1.4  nonaka /*	$NetBSD: wzero3_mci.c,v 1.4 2012/01/21 19:44:29 nonaka Exp $	*/
      2  1.1  nonaka 
      3  1.1  nonaka /*-
      4  1.4  nonaka  * Copyright (C) 2009 NONAKA Kimihiro <nonaka (at) netbsd.org>
      5  1.1  nonaka  * All rights reserved.
      6  1.1  nonaka  *
      7  1.1  nonaka  * Redistribution and use in source and binary forms, with or without
      8  1.1  nonaka  * modification, are permitted provided that the following conditions
      9  1.1  nonaka  * are met:
     10  1.1  nonaka  * 1. Redistributions of source code must retain the above copyright
     11  1.1  nonaka  *    notice, this list of conditions and the following disclaimer.
     12  1.1  nonaka  * 2. Redistributions in binary form must reproduce the above copyright
     13  1.1  nonaka  *    notice, this list of conditions and the following disclaimer in the
     14  1.1  nonaka  *    documentation and/or other materials provided with the distribution.
     15  1.1  nonaka  *
     16  1.4  nonaka  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  1.4  nonaka  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  1.4  nonaka  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  1.4  nonaka  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  1.4  nonaka  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  1.4  nonaka  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  1.4  nonaka  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  1.4  nonaka  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  1.4  nonaka  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  1.4  nonaka  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  1.1  nonaka  */
     27  1.1  nonaka 
     28  1.1  nonaka #include <sys/cdefs.h>
     29  1.4  nonaka __KERNEL_RCSID(0, "$NetBSD: wzero3_mci.c,v 1.4 2012/01/21 19:44:29 nonaka Exp $");
     30  1.1  nonaka 
     31  1.1  nonaka #include <sys/param.h>
     32  1.1  nonaka #include <sys/device.h>
     33  1.1  nonaka #include <sys/systm.h>
     34  1.1  nonaka #include <sys/pmf.h>
     35  1.3  dyoung #include <sys/bus.h>
     36  1.1  nonaka 
     37  1.1  nonaka #include <machine/bootinfo.h>
     38  1.1  nonaka #include <machine/platid.h>
     39  1.1  nonaka #include <machine/platid_mask.h>
     40  1.1  nonaka 
     41  1.1  nonaka #include <arm/xscale/pxa2x0cpu.h>
     42  1.1  nonaka #include <arm/xscale/pxa2x0reg.h>
     43  1.1  nonaka #include <arm/xscale/pxa2x0var.h>
     44  1.1  nonaka #include <arm/xscale/pxa2x0_gpio.h>
     45  1.1  nonaka #include <arm/xscale/pxa2x0_mci.h>
     46  1.1  nonaka 
     47  1.1  nonaka #include <dev/sdmmc/sdmmcreg.h>
     48  1.1  nonaka 
     49  1.1  nonaka #include <hpcarm/dev/wzero3_reg.h>
     50  1.1  nonaka 
     51  1.1  nonaka #if defined(PXAMCI_DEBUG)
     52  1.1  nonaka #define	DPRINTF(s)	do { printf s; } while (0)
     53  1.1  nonaka #else
     54  1.1  nonaka #define	DPRINTF(s)	do {} while (0)
     55  1.1  nonaka #endif
     56  1.1  nonaka 
     57  1.1  nonaka struct wzero3mci_softc {
     58  1.1  nonaka 	struct pxamci_softc sc;
     59  1.1  nonaka 
     60  1.1  nonaka 	void *sc_detect_ih;
     61  1.1  nonaka 	int sc_detect_pin;
     62  1.1  nonaka 	int sc_power_pin;
     63  1.1  nonaka };
     64  1.1  nonaka 
     65  1.1  nonaka static int pxamci_match(device_t, cfdata_t, void *);
     66  1.1  nonaka static void pxamci_attach(device_t, device_t, void *);
     67  1.1  nonaka 
     68  1.1  nonaka CFATTACH_DECL_NEW(wzero3mci, sizeof(struct wzero3mci_softc),
     69  1.1  nonaka     pxamci_match, pxamci_attach, NULL, NULL);
     70  1.1  nonaka 
     71  1.1  nonaka static int wzero3mci_intr(void *arg);
     72  1.1  nonaka 
     73  1.1  nonaka static uint32_t	wzero3mci_get_ocr(void *);
     74  1.1  nonaka static int wzero3mci_set_power(void *, uint32_t);
     75  1.1  nonaka static int wzero3mci_card_detect(void *);
     76  1.1  nonaka static int wzero3mci_write_protect(void *);
     77  1.1  nonaka 
     78  1.1  nonaka struct wzero3mci_model {
     79  1.1  nonaka 	platid_mask_t *platid;
     80  1.1  nonaka 	int detect_pin;	/* card detect pin# */
     81  1.1  nonaka 	int power_pin;	/* card power pin # */
     82  1.1  nonaka } wzero3mci_table[] = {
     83  1.1  nonaka 	/* WS003SH */
     84  1.1  nonaka 	{
     85  1.1  nonaka 		&platid_mask_MACH_SHARP_WZERO3_WS003SH,
     86  1.1  nonaka 		GPIO_WS003SH_SD_DETECT,
     87  1.1  nonaka 		GPIO_WS003SH_SD_POWER,
     88  1.1  nonaka 	},
     89  1.1  nonaka 	/* WS004SH */
     90  1.1  nonaka 	{
     91  1.1  nonaka 		&platid_mask_MACH_SHARP_WZERO3_WS004SH,
     92  1.1  nonaka 		GPIO_WS003SH_SD_DETECT,
     93  1.1  nonaka 		GPIO_WS003SH_SD_POWER,
     94  1.1  nonaka 	},
     95  1.1  nonaka 	/* WS007SH */
     96  1.1  nonaka 	{
     97  1.1  nonaka 		&platid_mask_MACH_SHARP_WZERO3_WS007SH,
     98  1.1  nonaka 		GPIO_WS007SH_SD_DETECT,
     99  1.1  nonaka 		GPIO_WS007SH_SD_POWER,
    100  1.1  nonaka 	},
    101  1.1  nonaka 	/* WS011SH */
    102  1.1  nonaka 	{
    103  1.1  nonaka 		&platid_mask_MACH_SHARP_WZERO3_WS011SH,
    104  1.1  nonaka 		GPIO_WS011SH_SD_DETECT,
    105  1.1  nonaka 		GPIO_WS011SH_SD_POWER,
    106  1.1  nonaka 	},
    107  1.1  nonaka 	/* WS0020H */
    108  1.1  nonaka 	{
    109  1.1  nonaka 		&platid_mask_MACH_SHARP_WZERO3_WS020SH,
    110  1.2  nonaka 		GPIO_WS020SH_SD_DETECT,
    111  1.2  nonaka 		GPIO_WS020SH_SD_POWER,
    112  1.1  nonaka 	},
    113  1.1  nonaka 
    114  1.1  nonaka 	{
    115  1.1  nonaka 		NULL, -1, -1
    116  1.1  nonaka 	},
    117  1.1  nonaka };
    118  1.1  nonaka 
    119  1.1  nonaka 
    120  1.1  nonaka static const struct wzero3mci_model *
    121  1.1  nonaka wzero3mci_lookup(void)
    122  1.1  nonaka {
    123  1.1  nonaka 	const struct wzero3mci_model *model;
    124  1.1  nonaka 
    125  1.1  nonaka 	for (model = wzero3mci_table; model->platid != NULL; model++) {
    126  1.1  nonaka 		if (platid_match(&platid, model->platid)) {
    127  1.1  nonaka 			return model;
    128  1.1  nonaka 		}
    129  1.1  nonaka 	}
    130  1.1  nonaka 	return NULL;
    131  1.1  nonaka }
    132  1.1  nonaka 
    133  1.1  nonaka static int
    134  1.1  nonaka pxamci_match(device_t parent, cfdata_t cf, void *aux)
    135  1.1  nonaka {
    136  1.1  nonaka 
    137  1.1  nonaka 	if (strcmp(cf->cf_name, "pxamci") != 0)
    138  1.1  nonaka 		return 0;
    139  1.1  nonaka 	if (wzero3mci_lookup() == NULL)
    140  1.1  nonaka 		return 0;
    141  1.1  nonaka 	return 1;
    142  1.1  nonaka }
    143  1.1  nonaka 
    144  1.1  nonaka static void
    145  1.1  nonaka pxamci_attach(device_t parent, device_t self, void *aux)
    146  1.1  nonaka {
    147  1.1  nonaka 	struct wzero3mci_softc *sc = device_private(self);
    148  1.1  nonaka 	struct pxaip_attach_args *pxa = aux;
    149  1.1  nonaka 	const struct wzero3mci_model *model;
    150  1.1  nonaka 
    151  1.1  nonaka 	sc->sc.sc_dev = self;
    152  1.1  nonaka 
    153  1.1  nonaka 	model = wzero3mci_lookup();
    154  1.1  nonaka 	if (model == NULL) {
    155  1.1  nonaka 		aprint_error(": Unknown model.");
    156  1.1  nonaka 		return;
    157  1.1  nonaka 	}
    158  1.1  nonaka 
    159  1.1  nonaka 	sc->sc_detect_pin = model->detect_pin;
    160  1.1  nonaka 	sc->sc_power_pin = model->power_pin;
    161  1.1  nonaka 
    162  1.1  nonaka 	/* Establish SD detect interrupt */
    163  1.1  nonaka 	if (sc->sc_detect_pin >= 0) {
    164  1.1  nonaka 		pxa2x0_gpio_set_function(sc->sc_detect_pin, GPIO_IN);
    165  1.1  nonaka 		sc->sc_detect_ih = pxa2x0_gpio_intr_establish(sc->sc_detect_pin,
    166  1.1  nonaka 		    IST_EDGE_BOTH, IPL_BIO, wzero3mci_intr, sc);
    167  1.1  nonaka 		if (sc->sc_detect_ih == NULL) {
    168  1.1  nonaka 			aprint_error_dev(self,
    169  1.1  nonaka 			    "unable to establish card detect interrupt\n");
    170  1.1  nonaka 			return;
    171  1.1  nonaka 		}
    172  1.1  nonaka 	}
    173  1.1  nonaka 
    174  1.1  nonaka 	sc->sc.sc_tag.cookie = sc;
    175  1.1  nonaka 	sc->sc.sc_tag.get_ocr = wzero3mci_get_ocr;
    176  1.1  nonaka 	sc->sc.sc_tag.set_power = wzero3mci_set_power;
    177  1.1  nonaka 	sc->sc.sc_tag.card_detect = wzero3mci_card_detect;
    178  1.1  nonaka 	sc->sc.sc_tag.write_protect = wzero3mci_write_protect;
    179  1.1  nonaka 	sc->sc.sc_caps = PMC_CAPS_4BIT;
    180  1.1  nonaka 
    181  1.1  nonaka 	if (pxamci_attach_sub(self, pxa)) {
    182  1.1  nonaka 		aprint_error_dev(self, "unable to attach MMC controller\n");
    183  1.1  nonaka 		goto free_intr;
    184  1.1  nonaka 	}
    185  1.1  nonaka 
    186  1.1  nonaka 	if (!pmf_device_register(self, NULL, NULL)) {
    187  1.1  nonaka 		aprint_error_dev(self, "couldn't establish power handler\n");
    188  1.1  nonaka 	}
    189  1.1  nonaka 
    190  1.1  nonaka 	return;
    191  1.1  nonaka 
    192  1.1  nonaka free_intr:
    193  1.1  nonaka 	pxa2x0_gpio_intr_disestablish(sc->sc_detect_ih);
    194  1.1  nonaka 	sc->sc_detect_ih = NULL;
    195  1.1  nonaka }
    196  1.1  nonaka 
    197  1.1  nonaka static int
    198  1.1  nonaka wzero3mci_intr(void *arg)
    199  1.1  nonaka {
    200  1.1  nonaka 	struct wzero3mci_softc *sc = (struct wzero3mci_softc *)arg;
    201  1.1  nonaka 
    202  1.1  nonaka 	pxa2x0_gpio_clear_intr(sc->sc_detect_pin);
    203  1.1  nonaka 
    204  1.1  nonaka 	pxamci_card_detect_event(&sc->sc);
    205  1.1  nonaka 
    206  1.1  nonaka 	return 1;
    207  1.1  nonaka }
    208  1.1  nonaka 
    209  1.1  nonaka /*ARGSUSED*/
    210  1.1  nonaka static uint32_t
    211  1.1  nonaka wzero3mci_get_ocr(void *arg)
    212  1.1  nonaka {
    213  1.1  nonaka 
    214  1.1  nonaka 	return MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V;
    215  1.1  nonaka }
    216  1.1  nonaka 
    217  1.1  nonaka static int
    218  1.1  nonaka wzero3mci_set_power(void *arg, uint32_t ocr)
    219  1.1  nonaka {
    220  1.1  nonaka 	struct wzero3mci_softc *sc = (struct wzero3mci_softc *)arg;
    221  1.1  nonaka 	int error = 0;
    222  1.1  nonaka 
    223  1.1  nonaka 	if (sc->sc_power_pin >= 0) {
    224  1.1  nonaka 		if (ISSET(ocr, MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V)) {
    225  1.1  nonaka 			/* power on */
    226  1.1  nonaka 			pxa2x0_gpio_set_bit(sc->sc_power_pin);
    227  1.1  nonaka 		} else if (ocr == 0) {
    228  1.1  nonaka 			/* power off */
    229  1.1  nonaka 			pxa2x0_gpio_clear_bit(sc->sc_power_pin);
    230  1.1  nonaka 		} else {
    231  1.1  nonaka 			aprint_error_dev(sc->sc.sc_dev,
    232  1.1  nonaka 			    "unsupported OCR (%#x)\n", ocr);
    233  1.1  nonaka 			error = EINVAL;
    234  1.1  nonaka 		}
    235  1.1  nonaka 	}
    236  1.1  nonaka 	return error;
    237  1.1  nonaka }
    238  1.1  nonaka 
    239  1.1  nonaka /*
    240  1.1  nonaka  * Return non-zero if the card is currently inserted.
    241  1.1  nonaka  */
    242  1.1  nonaka static int
    243  1.1  nonaka wzero3mci_card_detect(void *arg)
    244  1.1  nonaka {
    245  1.1  nonaka 	struct wzero3mci_softc *sc = (struct wzero3mci_softc *)arg;
    246  1.1  nonaka 
    247  1.1  nonaka 	if (sc->sc_detect_pin >= 0) {
    248  1.1  nonaka 		if (pxa2x0_gpio_get_bit(sc->sc_detect_pin))
    249  1.1  nonaka 			return 0;
    250  1.1  nonaka 	}
    251  1.1  nonaka 	return 1;
    252  1.1  nonaka }
    253  1.1  nonaka 
    254  1.1  nonaka /*
    255  1.1  nonaka  * Return non-zero if the card is currently write-protected.
    256  1.1  nonaka  */
    257  1.1  nonaka /*ARGSUSED*/
    258  1.1  nonaka static int
    259  1.1  nonaka wzero3mci_write_protect(void *arg)
    260  1.1  nonaka {
    261  1.1  nonaka 
    262  1.1  nonaka 	return 0;
    263  1.1  nonaka }
    264