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(addr: 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, compat: "fsl,imx51-m4if");
49 if (!np)
50 return;
51
52 m4if_base = of_iomap(node: np, index: 0);
53 of_node_put(node: 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(addr: 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(compat: "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
96

source code of linux/arch/arm/mach-imx/mach-imx51.c