xref: /netbsd-src/sys/arch/arm/imx/imx51_spi.c (revision 9e55e6308e1e0e92733b91f619df3fb5c9114240)
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