1 /* $NetBSD: imx51_esdhc.c,v 1.4 2018/06/06 01:49:07 maya Exp $ */
2
3 /*-
4 * Copyright (c) 2012 Genetec Corporation. All rights reserved.
5 * Written by Hiroyuki Bessho for Genetec Corporation.
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
13 * copyright notice, this list of conditions and the following
14 * disclaimer in the documentation and/or other materials provided
15 * with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS''
18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
20 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS
21 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
24 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
27 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31
32 #include <sys/cdefs.h>
33 __KERNEL_RCSID(0, "$NetBSD: imx51_esdhc.c,v 1.4 2018/06/06 01:49:07 maya Exp $");
34
35 #include "opt_imx.h"
36
37 #include <sys/param.h>
38 #include <sys/device.h>
39 #include <sys/systm.h>
40 #include <sys/bus.h>
41 #include <sys/pmf.h>
42
43 #include <machine/intr.h>
44
45 #include <dev/sdmmc/sdhcvar.h>
46 #include <dev/sdmmc/sdmmcvar.h>
47
48 #include <arm/imx/imx51reg.h>
49 #include <arm/imx/imx51var.h>
50 #include <arm/imx/imx51_ccmvar.h>
51
52 struct sdhc_axi_softc {
53 struct sdhc_softc sc_sdhc;
54 /* we have only one slot */
55 struct sdhc_host *sc_hosts[1];
56
57 void *sc_ih;
58 };
59
60 static int sdhc_match(device_t, cfdata_t, void *);
61 static void sdhc_attach(device_t, device_t, void *);
62
63 CFATTACH_DECL_NEW(sdhc_axi, sizeof(struct sdhc_axi_softc),
64 sdhc_match, sdhc_attach, NULL, NULL);
65
66 static int
sdhc_match(device_t parent,cfdata_t cf,void * aux)67 sdhc_match(device_t parent, cfdata_t cf, void *aux)
68 {
69
70 struct axi_attach_args *aa = aux;
71
72 switch (aa->aa_addr) {
73 case ESDHC1_BASE:
74 case ESDHC2_BASE:
75 case ESDHC3_BASE:
76 case ESDHC4_BASE:
77 return 1;
78 }
79
80 return 0;
81 }
82
83 static void
sdhc_attach(device_t parent,device_t self,void * aux)84 sdhc_attach(device_t parent, device_t self, void *aux)
85 {
86 struct sdhc_axi_softc *sc = device_private(self);
87 struct axi_attach_args *aa = aux;
88 bus_space_tag_t iot = aa->aa_iot;
89 bus_space_handle_t ioh;
90 u_int perclk = 0;
91
92 sc->sc_sdhc.sc_dev = self;
93
94 sc->sc_sdhc.sc_dmat = aa->aa_dmat;
95
96 if (bus_space_map(iot, aa->aa_addr, ESDHC_SIZE, 0, &ioh)) {
97 aprint_error_dev(self, "can't map\n");
98 return;
99 }
100
101 aprint_normal(": SD/MMC host controller\n");
102 aprint_naive("\n");
103 sc->sc_sdhc.sc_host = sc->sc_hosts;
104 /* base clock frequency in kHz */
105 switch (aa->aa_addr) {
106 case ESDHC1_BASE:
107 perclk = imx51_get_clock(IMX51CLK_ESDHC1_CLK_ROOT);
108 break;
109 case ESDHC2_BASE:
110 perclk = imx51_get_clock(IMX51CLK_ESDHC2_CLK_ROOT);
111 break;
112 case ESDHC3_BASE:
113 perclk = imx51_get_clock(IMX51CLK_ESDHC3_CLK_ROOT);
114 break;
115 case ESDHC4_BASE:
116 perclk = imx51_get_clock(IMX51CLK_ESDHC4_CLK_ROOT);
117 break;
118 }
119 sc->sc_sdhc.sc_clkbase = perclk / 1000;
120 sc->sc_sdhc.sc_flags |= SDHC_FLAG_USE_DMA;
121 sc->sc_sdhc.sc_flags |= SDHC_FLAG_HAVE_DVS |
122 SDHC_FLAG_NO_PWR0 |
123 SDHC_FLAG_32BIT_ACCESS |
124 SDHC_FLAG_ENHANCED;
125
126 sc->sc_ih = intr_establish(aa->aa_irq, IPL_SDMMC, IST_LEVEL,
127 sdhc_intr, &sc->sc_sdhc);
128
129 if (sc->sc_ih == NULL) {
130 aprint_error_dev(self, "can't establish interrupt\n");
131 return;
132 }
133
134 if (sdhc_host_found(&sc->sc_sdhc, iot, ioh, ESDHC_SIZE)) {
135 aprint_error_dev(self, "can't initialize host\n");
136 return;
137 }
138
139 if (!pmf_device_register1(self, sdhc_suspend, sdhc_resume,
140 sdhc_shutdown)) {
141 aprint_error_dev(self,
142 "can't establish power hook\n");
143 }
144 }
145