imx51_spi.c revision 1.1 
1/*	$NetBSD: imx51_spi.c,v 1.1 2014/03/22 09:28:08 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 1.1 2014/03/22 09:28:08 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
45struct imx51spi_softc {
46	struct imxspi_softc sc_spi;
47	struct spi_chipset_tag sc_tag;
48};
49
50CFATTACH_DECL_NEW(imx51_spi, sizeof(struct imx51spi_softc),
51    imxspi_match, imxspi_attach, NULL, NULL);
52
53static int
54imxspi_cs_enable(void *arg, int slave)
55{
56	return 0;
57}
58
59static int
60imxspi_cs_disable(void *arg, int slave)
61{
62	return 0;
63}
64
65int
66imxspi_match(device_t parent, cfdata_t cf, void *aux)
67{
68	if (strcmp(cf->cf_name, "imxspi") == 0)
69		return 1;
70
71	return 0;
72}
73
74void
75imxspi_attach(device_t parent, device_t self, void *aux)
76{
77	struct imx51spi_softc *sc = device_private(self);
78	struct axi_attach_args *aa = aux;
79	struct imxspi_attach_args saa;
80	int cf_flags = device_cfdata(self)->cf_flags;
81
82	sc->sc_tag.cookie = sc;
83	sc->sc_tag.spi_cs_enable = imxspi_cs_enable;
84	sc->sc_tag.spi_cs_disable = imxspi_cs_disable;
85
86	saa.saa_iot = aa->aa_iot;
87	saa.saa_addr = aa->aa_addr;
88	saa.saa_size = aa->aa_size;
89	saa.saa_irq = aa->aa_irq;
90	saa.saa_enhanced = cf_flags;
91
92	saa.saa_nslaves = IMXSPINSLAVES;
93	saa.saa_freq = imx51_get_clock(IMX51CLK_CSPI_CLK_ROOT);
94	saa.saa_tag = &sc->sc_tag;
95
96	sc->sc_spi.sc_dev = self;
97
98	imxspi_attach_common(parent, &sc->sc_spi, &saa);
99}
100