1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 * Copyright 2011 Freescale Semiconductor, Inc. All Rights Reserved.
 4 * Copyright 2011 Linaro Ltd.
 5 */
 6
 7#include <linux/io.h>
 8#include <linux/of.h>
 9#include <linux/of_address.h>
10#include <asm/mach/arch.h>
11
12#include "common.h"
13#include "hardware.h"
14
15static void __init imx51_init_early(void)
16{
17	mxc_set_cpu_type(MXC_CPU_MX51);
18}
19
20/*
21 * The MIPI HSC unit has been removed from the i.MX51 Reference Manual by
22 * the Freescale marketing division. However this did not remove the
23 * hardware from the chip which still needs to be configured for proper
24 * IPU support.
25 */
26#define MX51_MIPI_HSC_BASE 0x83fdc000
27static void __init imx51_ipu_mipi_setup(void)
28{
29	void __iomem *hsc_addr;
30
31	hsc_addr = ioremap(MX51_MIPI_HSC_BASE, SZ_16K);
32	WARN_ON(!hsc_addr);
33
34	/* setup MIPI module to legacy mode */
35	imx_writel(0xf00, hsc_addr);
36
37	/* CSI mode: reserved; DI control mode: legacy (from Freescale BSP) */
38	imx_writel(imx_readl(hsc_addr + 0x800) | 0x30ff, hsc_addr + 0x800);
39
40	iounmap(hsc_addr);
41}
42
43static void __init imx51_m4if_setup(void)
44{
45	void __iomem *m4if_base;
46	struct device_node *np;
47
48	np = of_find_compatible_node(NULL, NULL, "fsl,imx51-m4if");
49	if (!np)
50		return;
51
52	m4if_base = of_iomap(np, 0);
53	of_node_put(np);
54	if (!m4if_base) {
55		pr_err("Unable to map M4IF registers\n");
56		return;
57	}
58
59	/*
60	 * Configure VPU and IPU with higher priorities
61	 * in order to avoid artifacts during video playback
62	 */
63	writel_relaxed(0x00000203, m4if_base + 0x40);
64	writel_relaxed(0x00000000, m4if_base + 0x44);
65	writel_relaxed(0x00120125, m4if_base + 0x9c);
66	writel_relaxed(0x001901A3, m4if_base + 0x48);
67	iounmap(m4if_base);
68}
69
70static void __init imx51_dt_init(void)
71{
72	imx51_ipu_mipi_setup();
73	imx_src_init();
74	imx51_m4if_setup();
75	imx5_pmu_init();
76	imx_aips_allow_unprivileged_access("fsl,imx51-aipstz");
77}
78
79static void __init imx51_init_late(void)
80{
81	mx51_neon_fixup();
82	imx51_pm_init();
83}
84
85static const char * const imx51_dt_board_compat[] __initconst = {
86	"fsl,imx51",
87	NULL
88};
89
90DT_MACHINE_START(IMX51_DT, "Freescale i.MX51 (Device Tree Support)")
91	.init_early	= imx51_init_early,
92	.init_machine	= imx51_dt_init,
93	.init_late	= imx51_init_late,
94	.dt_compat	= imx51_dt_board_compat,
95MACHINE_END

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