1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/err.h>
3 #include <linux/module.h>
4 #include <linux/io.h>
5 #include <linux/of.h>
6 #include <linux/of_address.h>
7 
8 #include "hardware.h"
9 #include "common.h"
10 
11 unsigned int __mxc_cpu_type;
12 static unsigned int imx_soc_revision;
13 
mxc_set_cpu_type(unsigned int type)14 void mxc_set_cpu_type(unsigned int type)
15 {
16 	__mxc_cpu_type = type;
17 }
18 
imx_set_soc_revision(unsigned int rev)19 void imx_set_soc_revision(unsigned int rev)
20 {
21 	imx_soc_revision = rev;
22 }
23 
imx_get_soc_revision(void)24 unsigned int imx_get_soc_revision(void)
25 {
26 	return imx_soc_revision;
27 }
28 
imx_print_silicon_rev(const char * cpu,int srev)29 void imx_print_silicon_rev(const char *cpu, int srev)
30 {
31 	if (srev == IMX_CHIP_REVISION_UNKNOWN)
32 		pr_info("CPU identified as %s, unknown revision\n", cpu);
33 	else
34 		pr_info("CPU identified as %s, silicon rev %d.%d\n",
35 				cpu, (srev >> 4) & 0xf, srev & 0xf);
36 }
37 
imx_set_aips(void __iomem * base)38 void __init imx_set_aips(void __iomem *base)
39 {
40 	unsigned int reg;
41 /*
42  * Set all MPROTx to be non-bufferable, trusted for R/W,
43  * not forced to user-mode.
44  */
45 	imx_writel(0x77777777, base + 0x0);
46 	imx_writel(0x77777777, base + 0x4);
47 
48 /*
49  * Set all OPACRx to be non-bufferable, to not require
50  * supervisor privilege level for access, allow for
51  * write access and untrusted master access.
52  */
53 	imx_writel(0x0, base + 0x40);
54 	imx_writel(0x0, base + 0x44);
55 	imx_writel(0x0, base + 0x48);
56 	imx_writel(0x0, base + 0x4C);
57 	reg = imx_readl(base + 0x50) & 0x00FFFFFF;
58 	imx_writel(reg, base + 0x50);
59 }
60 
imx_aips_allow_unprivileged_access(const char * compat)61 void __init imx_aips_allow_unprivileged_access(
62 		const char *compat)
63 {
64 	void __iomem *aips_base_addr;
65 	struct device_node *np;
66 
67 	for_each_compatible_node(np, NULL, compat) {
68 		aips_base_addr = of_iomap(np, 0);
69 		WARN_ON(!aips_base_addr);
70 		imx_set_aips(aips_base_addr);
71 	}
72 }
73