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