sun9i_a80_mmcclk.c revision 1.1 
1/* $NetBSD: sun9i_a80_mmcclk.c,v 1.1 2017/10/08 18:00:36 jmcneill Exp $ */
2
3/*-
4 * Copyright (c) 2017 Jared McNeill <jmcneill@invisible.ca>
5 * All rights reserved.
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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * 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
31__KERNEL_RCSID(1, "$NetBSD: sun9i_a80_mmcclk.c,v 1.1 2017/10/08 18:00:36 jmcneill Exp $");
32
33#include <sys/param.h>
34#include <sys/bus.h>
35#include <sys/device.h>
36#include <sys/systm.h>
37
38#include <dev/fdt/fdtvar.h>
39
40#include <arm/sunxi/sunxi_ccu.h>
41
42#define	SDC_COMM(port)	(0x04 * (port))
43
44static int sun9i_a80_mmcclk_match(device_t, cfdata_t, void *);
45static void sun9i_a80_mmcclk_attach(device_t, device_t, void *);
46
47static const char * compatible[] = {
48	"allwinner,sun9i-a80-mmc-config-clk",
49	NULL
50};
51
52CFATTACH_DECL_NEW(sunxi_a80_mmcclk, sizeof(struct sunxi_ccu_softc),
53	sun9i_a80_mmcclk_match, sun9i_a80_mmcclk_attach, NULL, NULL);
54
55static struct sunxi_ccu_reset sun9i_a80_mmcclk_resets[] = {
56	SUNXI_CCU_RESET(0, SDC_COMM(0), 18),
57	SUNXI_CCU_RESET(1, SDC_COMM(1), 18),
58	SUNXI_CCU_RESET(2, SDC_COMM(2), 18),
59	SUNXI_CCU_RESET(3, SDC_COMM(3), 18),
60};
61
62static struct sunxi_ccu_clk sun9i_a80_mmcclk_clks[] = {
63	SUNXI_CCU_GATE(0, "mmc0_config", "ahb", SDC_COMM(0), 16),
64	SUNXI_CCU_GATE(1, "mmc1_config", "ahb", SDC_COMM(1), 16),
65	SUNXI_CCU_GATE(2, "mmc2_config", "ahb", SDC_COMM(2), 16),
66	SUNXI_CCU_GATE(3, "mmc3_config", "ahb", SDC_COMM(3), 16),
67};
68
69static int
70sun9i_a80_mmcclk_match(device_t parent, cfdata_t cf, void *aux)
71{
72	struct fdt_attach_args * const faa = aux;
73
74	return of_match_compatible(faa->faa_phandle, compatible);
75}
76
77static void
78sun9i_a80_mmcclk_attach(device_t parent, device_t self, void *aux)
79{
80	struct sunxi_ccu_softc * const sc = device_private(self);
81	struct fdt_attach_args * const faa = aux;
82
83	sc->sc_dev = self;
84	sc->sc_phandle = faa->faa_phandle;
85	sc->sc_bst = faa->faa_bst;
86
87	sc->sc_resets = sun9i_a80_mmcclk_resets;
88	sc->sc_nresets = __arraycount(sun9i_a80_mmcclk_resets);
89
90	sc->sc_clks = sun9i_a80_mmcclk_clks;
91	sc->sc_nclks = __arraycount(sun9i_a80_mmcclk_clks);
92
93	if (sunxi_ccu_attach(sc) != 0)
94		return;
95
96	aprint_naive("\n");
97	aprint_normal(": A80 SD/MMC-COMM\n");
98
99	sunxi_ccu_print(sc);
100}
101