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zmci.c revision 1.3
      1  1.3  nonaka /*	$NetBSD: zmci.c,v 1.3 2011/06/19 16:20:09 nonaka Exp $	*/
      2  1.1  nonaka 
      3  1.1  nonaka /*-
      4  1.1  nonaka  * Copyright (c) 2006-2008 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  1.1  nonaka  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     17  1.1  nonaka  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  1.1  nonaka  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  1.1  nonaka  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     20  1.1  nonaka  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  1.1  nonaka  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  1.1  nonaka  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  1.1  nonaka  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  1.1  nonaka  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  1.1  nonaka  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  1.1  nonaka  * SUCH DAMAGE.
     27  1.1  nonaka  */
     28  1.1  nonaka 
     29  1.1  nonaka #include <sys/cdefs.h>
     30  1.3  nonaka __KERNEL_RCSID(0, "$NetBSD: zmci.c,v 1.3 2011/06/19 16:20:09 nonaka Exp $");
     31  1.1  nonaka 
     32  1.1  nonaka #include <sys/param.h>
     33  1.1  nonaka #include <sys/device.h>
     34  1.1  nonaka #include <sys/systm.h>
     35  1.1  nonaka #include <sys/bus.h>
     36  1.1  nonaka #include <sys/pmf.h>
     37  1.1  nonaka 
     38  1.1  nonaka #include <machine/intr.h>
     39  1.1  nonaka 
     40  1.1  nonaka #include <arm/xscale/pxa2x0cpu.h>
     41  1.1  nonaka #include <arm/xscale/pxa2x0reg.h>
     42  1.1  nonaka #include <arm/xscale/pxa2x0var.h>
     43  1.1  nonaka #include <arm/xscale/pxa2x0_gpio.h>
     44  1.1  nonaka #include <arm/xscale/pxa2x0_mci.h>
     45  1.1  nonaka 
     46  1.1  nonaka #include <dev/sdmmc/sdmmcreg.h>
     47  1.1  nonaka 
     48  1.1  nonaka #include <zaurus/dev/scoopreg.h>
     49  1.1  nonaka #include <zaurus/dev/scoopvar.h>
     50  1.1  nonaka 
     51  1.1  nonaka #include <zaurus/zaurus/zaurus_reg.h>
     52  1.1  nonaka #include <zaurus/zaurus/zaurus_var.h>
     53  1.1  nonaka 
     54  1.1  nonaka #if defined(PXAMCI_DEBUG)
     55  1.1  nonaka #define	DPRINTF(s)	do { printf s; } while (0)
     56  1.1  nonaka #else
     57  1.1  nonaka #define	DPRINTF(s)	do {} while (0)
     58  1.1  nonaka #endif
     59  1.1  nonaka 
     60  1.1  nonaka struct zmci_softc {
     61  1.1  nonaka 	struct pxamci_softc sc;
     62  1.1  nonaka 
     63  1.1  nonaka 	void *sc_detect_ih;
     64  1.1  nonaka 	int sc_detect_pin;
     65  1.1  nonaka 	int sc_wp_pin;
     66  1.1  nonaka };
     67  1.1  nonaka 
     68  1.1  nonaka static int pxamci_match(device_t, cfdata_t, void *);
     69  1.1  nonaka static void pxamci_attach(device_t, device_t, void *);
     70  1.1  nonaka 
     71  1.1  nonaka CFATTACH_DECL_NEW(zmci, sizeof(struct zmci_softc),
     72  1.1  nonaka     pxamci_match, pxamci_attach, NULL, NULL);
     73  1.1  nonaka 
     74  1.1  nonaka static int zmci_intr(void *arg);
     75  1.1  nonaka 
     76  1.1  nonaka static uint32_t	zmci_get_ocr(void *);
     77  1.1  nonaka static int zmci_set_power(void *, uint32_t);
     78  1.1  nonaka static int zmci_card_detect(void *);
     79  1.1  nonaka static int zmci_write_protect(void *);
     80  1.1  nonaka 
     81  1.1  nonaka static int
     82  1.1  nonaka pxamci_match(device_t parent, cfdata_t cf, void *aux)
     83  1.1  nonaka {
     84  1.1  nonaka 
     85  1.3  nonaka 	if (ZAURUS_ISC1000 || ZAURUS_ISC3000)
     86  1.3  nonaka 		return 1;
     87  1.3  nonaka 	return 0;
     88  1.1  nonaka }
     89  1.1  nonaka 
     90  1.1  nonaka static void
     91  1.1  nonaka pxamci_attach(device_t parent, device_t self, void *aux)
     92  1.1  nonaka {
     93  1.1  nonaka 	struct zmci_softc *sc = device_private(self);
     94  1.1  nonaka 	struct pxaip_attach_args *pxa = aux;
     95  1.1  nonaka 
     96  1.1  nonaka 	sc->sc.sc_dev = self;
     97  1.1  nonaka 
     98  1.3  nonaka 	if (ZAURUS_ISC1000 || ZAURUS_ISC3000) {
     99  1.1  nonaka 		sc->sc_detect_pin = C3000_GPIO_SD_DETECT_PIN;
    100  1.1  nonaka 		sc->sc_wp_pin = C3000_GPIO_SD_WP_PIN;
    101  1.1  nonaka 		pxa2x0_gpio_set_function(sc->sc_detect_pin, GPIO_IN);
    102  1.1  nonaka 		pxa2x0_gpio_set_function(sc->sc_wp_pin, GPIO_IN);
    103  1.1  nonaka 	} else {
    104  1.1  nonaka 		/* XXX: C7x0/C8x0 */
    105  1.1  nonaka 		return;
    106  1.1  nonaka 	}
    107  1.1  nonaka 
    108  1.1  nonaka 	/* Establish SD detect interrupt */
    109  1.1  nonaka 	sc->sc_detect_ih = pxa2x0_gpio_intr_establish(sc->sc_detect_pin,
    110  1.1  nonaka 	    IST_EDGE_BOTH, IPL_BIO, zmci_intr, sc);
    111  1.1  nonaka 	if (sc->sc_detect_ih == NULL) {
    112  1.1  nonaka 		aprint_error_dev(self,
    113  1.1  nonaka 		    "unable to establish nSD_DETECT interrupt\n");
    114  1.1  nonaka 		return;
    115  1.1  nonaka 	}
    116  1.1  nonaka 
    117  1.1  nonaka 	sc->sc.sc_tag.cookie = sc;
    118  1.1  nonaka 	sc->sc.sc_tag.get_ocr = zmci_get_ocr;
    119  1.1  nonaka 	sc->sc.sc_tag.set_power = zmci_set_power;
    120  1.1  nonaka 	sc->sc.sc_tag.card_detect = zmci_card_detect;
    121  1.1  nonaka 	sc->sc.sc_tag.write_protect = zmci_write_protect;
    122  1.2  nonaka 	sc->sc.sc_caps = PMC_CAPS_4BIT;
    123  1.1  nonaka 
    124  1.1  nonaka 	if (pxamci_attach_sub(self, pxa)) {
    125  1.1  nonaka 		aprint_error_dev(self, "unable to attach MMC controller\n");
    126  1.1  nonaka 		goto free_intr;
    127  1.1  nonaka 	}
    128  1.1  nonaka 
    129  1.1  nonaka 	if (!pmf_device_register(self, NULL, NULL)) {
    130  1.1  nonaka 		aprint_error_dev(self, "couldn't establish power handler\n");
    131  1.1  nonaka 	}
    132  1.1  nonaka 
    133  1.1  nonaka 	return;
    134  1.1  nonaka 
    135  1.1  nonaka free_intr:
    136  1.1  nonaka 	pxa2x0_gpio_intr_disestablish(sc->sc_detect_ih);
    137  1.1  nonaka 	sc->sc_detect_ih = NULL;
    138  1.1  nonaka }
    139  1.1  nonaka 
    140  1.1  nonaka static int
    141  1.1  nonaka zmci_intr(void *arg)
    142  1.1  nonaka {
    143  1.1  nonaka 	struct zmci_softc *sc = (struct zmci_softc *)arg;
    144  1.1  nonaka 
    145  1.1  nonaka 	pxa2x0_gpio_clear_intr(sc->sc_detect_pin);
    146  1.1  nonaka 
    147  1.1  nonaka 	pxamci_card_detect_event(&sc->sc);
    148  1.1  nonaka 
    149  1.1  nonaka 	return 1;
    150  1.1  nonaka }
    151  1.1  nonaka 
    152  1.1  nonaka static uint32_t
    153  1.1  nonaka zmci_get_ocr(void *arg)
    154  1.1  nonaka {
    155  1.1  nonaka 
    156  1.1  nonaka 	return MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V;
    157  1.1  nonaka }
    158  1.1  nonaka 
    159  1.1  nonaka static int
    160  1.1  nonaka zmci_set_power(void *arg, uint32_t ocr)
    161  1.1  nonaka {
    162  1.1  nonaka 	struct zmci_softc *sc = (struct zmci_softc *)arg;
    163  1.1  nonaka 
    164  1.1  nonaka 	if (ISSET(ocr, MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V)) {
    165  1.1  nonaka 		scoop_set_sdmmc_power(1);
    166  1.1  nonaka 		return 0;
    167  1.1  nonaka 	}
    168  1.1  nonaka 
    169  1.1  nonaka 	if (ocr != 0) {
    170  1.1  nonaka 		printf("%s: zmci_set_power(): unsupported OCR (%#x)\n",
    171  1.1  nonaka 		    device_xname(sc->sc.sc_dev), ocr);
    172  1.1  nonaka 		return EINVAL;
    173  1.1  nonaka 	}
    174  1.1  nonaka 
    175  1.1  nonaka 	/* power off */
    176  1.1  nonaka 	scoop_set_sdmmc_power(0);
    177  1.1  nonaka 	return 0;
    178  1.1  nonaka }
    179  1.1  nonaka 
    180  1.1  nonaka /*
    181  1.1  nonaka  * Return non-zero if the card is currently inserted.
    182  1.1  nonaka  */
    183  1.1  nonaka static int
    184  1.1  nonaka zmci_card_detect(void *arg)
    185  1.1  nonaka {
    186  1.1  nonaka 	struct zmci_softc *sc = (struct zmci_softc *)arg;
    187  1.1  nonaka 
    188  1.1  nonaka 	if (!pxa2x0_gpio_get_bit(sc->sc_detect_pin))
    189  1.1  nonaka 		return 1;
    190  1.1  nonaka 	return 0;
    191  1.1  nonaka }
    192  1.1  nonaka 
    193  1.1  nonaka /*
    194  1.1  nonaka  * Return non-zero if the card is currently write-protected.
    195  1.1  nonaka  */
    196  1.1  nonaka static int
    197  1.1  nonaka zmci_write_protect(void *arg)
    198  1.1  nonaka {
    199  1.1  nonaka 	struct zmci_softc *sc = (struct zmci_softc *)arg;
    200  1.1  nonaka 
    201  1.1  nonaka 	if (pxa2x0_gpio_get_bit(sc->sc_wp_pin))
    202  1.1  nonaka 		return 1;
    203  1.1  nonaka 	return 0;
    204  1.1  nonaka }
    205