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
15 static 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
27 static 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
43 static 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
70 static 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
79 static void __init imx51_init_late(void)
80 {
81 mx51_neon_fixup();
82 imx51_pm_init();
83 }
84
85 static const char * const imx51_dt_board_compat[] __initconst = {
86 "fsl,imx51",
87 NULL
88 };
89
90 DT_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,
95 MACHINE_END
96
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.