1/*-
2 * Copyright (c) 2012 Olivier Houchard.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include <sys/cdefs.h>
27__FBSDID("$FreeBSD$");
28
29/*
30 * The machine-dependent part of the arm/pl310 driver for imx6 SoCs.
31 */
32
33#include <sys/types.h>
34#include <sys/param.h>
35#include <sys/systm.h>
36#include <sys/bus.h>
37#include <sys/rman.h>
38#include <sys/lock.h>
39#include <sys/mutex.h>
40
41#include <machine/bus.h>
42#include <machine/pl310.h>
43
44void
45platform_pl310_init(struct pl310_softc *sc)
46{
47	uint32_t reg;
48
49	/*
50	 * Enable power saving modes:
51	 *  - Dynamic Gating stops the clock when the controller is idle.
52	 *  - Standby stops the clock when the cores are in WFI mode.
53	 */
54	reg = pl310_read4(sc, PL310_POWER_CTRL);
55	reg |= POWER_CTRL_ENABLE_GATING | POWER_CTRL_ENABLE_STANDBY;
56	pl310_write4(sc, PL310_POWER_CTRL, reg);
57
58	pl310_set_ram_latency(sc, PL310_TAG_RAM_CTRL,  4, 2, 3);
59	pl310_set_ram_latency(sc, PL310_DATA_RAM_CTRL, 4, 2, 3);
60}
61
62void
63platform_pl310_write_ctrl(struct pl310_softc *sc, uint32_t val)
64{
65
66	pl310_write4(sc, PL310_CTRL, val);
67}
68
69void
70platform_pl310_write_debug(struct pl310_softc *sc, uint32_t val)
71{
72
73	pl310_write4(sc, PL310_DEBUG_CTRL, val);
74}
75
76