1 /* $NetBSD: imx51_spi.c,v 1.3 2019/09/27 02:59:21 hkenken Exp $ */
2
3 /*-
4 * Copyright (c) 2014 Genetec Corporation. All rights reserved.
5 * Written by Hashimoto Kenichi 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 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 REGENTS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: imx51_spi.c,v 1.3 2019/09/27 02:59:21 hkenken Exp $");
31
32 #include "locators.h"
33 #include "opt_imx.h"
34 #include "opt_imxspi.h"
35
36 #include <sys/param.h>
37 #include <sys/bus.h>
38 #include <sys/device.h>
39
40 #include <arm/imx/imxspivar.h>
41 #include <arm/imx/imx51reg.h>
42 #include <arm/imx/imx51var.h>
43 #include <arm/imx/imx51_ccmvar.h>
44
45 struct imx51spi_softc {
46 struct imxspi_softc sc_spi; /* Must be first */
47
48 struct spi_chipset_tag sc_tag;
49 };
50
51 CFATTACH_DECL_NEW(imx51_spi, sizeof(struct imx51spi_softc),
52 imxspi_match, imxspi_attach, NULL, NULL);
53
54 static int
imxspi_cs_enable(void * arg,int slave)55 imxspi_cs_enable(void *arg, int slave)
56 {
57 return 0;
58 }
59
60 static int
imxspi_cs_disable(void * arg,int slave)61 imxspi_cs_disable(void *arg, int slave)
62 {
63 return 0;
64 }
65
66 int
imxspi_match(device_t parent,cfdata_t cf,void * aux)67 imxspi_match(device_t parent, cfdata_t cf, void *aux)
68 {
69 if (strcmp(cf->cf_name, "imxspi") == 0)
70 return 1;
71
72 return 0;
73 }
74
75 void
imxspi_attach(device_t parent,device_t self,void * aux)76 imxspi_attach(device_t parent, device_t self, void *aux)
77 {
78 struct imx51spi_softc *isc = device_private(self);
79 struct imxspi_softc *sc = &isc->sc_spi;
80 struct axi_attach_args *aa = aux;
81 struct imxspi_attach_args saa;
82 int cf_flags = device_cfdata(self)->cf_flags;
83 bus_addr_t addr;
84 bus_size_t size;
85 int error;
86
87 addr = aa->aa_addr;
88 size = aa->aa_size;
89 if (size <= 0)
90 size = SPI_SIZE;
91
92 sc->sc_tag.cookie = sc;
93 sc->sc_tag.spi_cs_enable = imxspi_cs_enable;
94 sc->sc_tag.spi_cs_disable = imxspi_cs_disable;
95
96 sc->sc_iot = aa->aa_iot;
97 sc->sc_enhanced = cf_flags;
98 if (sc->sc_enhanced)
99 sc->sc_type = IMX51_ECSPI;
100 else
101 sc->sc_type = IMX35_CSPI;
102
103 sc->sc_nslaves = IMXSPINSLAVES;
104 sc->sc_freq = imx51_get_clock(IMX51CLK_CSPI_CLK_ROOT);
105 sc->sc_tag = &sc->sc_tag;
106
107 if (bus_space_map(sc->sc_iot, addr, size, 0, &sc->sc_ioh)) {
108 aprint_error_dev(sc->sc_dev, "couldn't map registers\n");
109 return;
110 }
111
112 /* enable device interrupts */
113 sc->sc_ih = intr_establish(aa->aa_irq, IPL_BIO, IST_LEVEL,
114 imxspi_intr, sc);
115
116 imxspi_attach_common(self);
117 }
118