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/irq.h>
9 #include <linux/of_address.h>
10 #include <linux/of_irq.h>
11 #include <linux/of_platform.h>
12 #include <asm/mach/arch.h>
13 #include <asm/mach/time.h>
14 
15 #include "common.h"
16 #include "hardware.h"
17 
imx51_init_early(void)18 static void __init imx51_init_early(void)
19 {
20 	mxc_set_cpu_type(MXC_CPU_MX51);
21 }
22 
23 /*
24  * The MIPI HSC unit has been removed from the i.MX51 Reference Manual by
25  * the Freescale marketing division. However this did not remove the
26  * hardware from the chip which still needs to be configured for proper
27  * IPU support.
28  */
29 #define MX51_MIPI_HSC_BASE 0x83fdc000
imx51_ipu_mipi_setup(void)30 static void __init imx51_ipu_mipi_setup(void)
31 {
32 	void __iomem *hsc_addr;
33 
34 	hsc_addr = ioremap(MX51_MIPI_HSC_BASE, SZ_16K);
35 	WARN_ON(!hsc_addr);
36 
37 	/* setup MIPI module to legacy mode */
38 	imx_writel(0xf00, hsc_addr);
39 
40 	/* CSI mode: reserved; DI control mode: legacy (from Freescale BSP) */
41 	imx_writel(imx_readl(hsc_addr + 0x800) | 0x30ff, hsc_addr + 0x800);
42 
43 	iounmap(hsc_addr);
44 }
45 
imx51_m4if_setup(void)46 static void __init imx51_m4if_setup(void)
47 {
48 	void __iomem *m4if_base;
49 	struct device_node *np;
50 
51 	np = of_find_compatible_node(NULL, NULL, "fsl,imx51-m4if");
52 	if (!np)
53 		return;
54 
55 	m4if_base = of_iomap(np, 0);
56 	of_node_put(np);
57 	if (!m4if_base) {
58 		pr_err("Unable to map M4IF registers\n");
59 		return;
60 	}
61 
62 	/*
63 	 * Configure VPU and IPU with higher priorities
64 	 * in order to avoid artifacts during video playback
65 	 */
66 	writel_relaxed(0x00000203, m4if_base + 0x40);
67 	writel_relaxed(0x00000000, m4if_base + 0x44);
68 	writel_relaxed(0x00120125, m4if_base + 0x9c);
69 	writel_relaxed(0x001901A3, m4if_base + 0x48);
70 	iounmap(m4if_base);
71 }
72 
imx51_dt_init(void)73 static void __init imx51_dt_init(void)
74 {
75 	imx51_ipu_mipi_setup();
76 	imx_src_init();
77 	imx51_m4if_setup();
78 	imx5_pmu_init();
79 	imx_aips_allow_unprivileged_access("fsl,imx51-aipstz");
80 }
81 
imx51_init_late(void)82 static void __init imx51_init_late(void)
83 {
84 	mx51_neon_fixup();
85 	imx51_pm_init();
86 }
87 
88 static const char * const imx51_dt_board_compat[] __initconst = {
89 	"fsl,imx51",
90 	NULL
91 };
92 
93 DT_MACHINE_START(IMX51_DT, "Freescale i.MX51 (Device Tree Support)")
94 	.init_early	= imx51_init_early,
95 	.init_machine	= imx51_dt_init,
96 	.init_late	= imx51_init_late,
97 	.dt_compat	= imx51_dt_board_compat,
98 MACHINE_END
99