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// SPDX-License-Identifier: GPL-2.0
#include <linux/err.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/slab.h>
#include <linux/sys_soc.h>
#include "hardware.h"
#include "common.h"
unsigned int __mxc_cpu_type;
static unsigned int imx_soc_revision;
void mxc_set_cpu_type(unsigned int type)
{
__mxc_cpu_type = type;
}
void imx_set_soc_revision(unsigned int rev)
{
imx_soc_revision = rev;
}
unsigned int imx_get_soc_revision(void)
{
return imx_soc_revision;
}
void imx_print_silicon_rev(const char *cpu, int srev)
{
if (srev == IMX_CHIP_REVISION_UNKNOWN)
pr_info("CPU identified as %s, unknown revision\n", cpu);
else
pr_info("CPU identified as %s, silicon rev %d.%d\n",
cpu, (srev >> 4) & 0xf, srev & 0xf);
}
void __init imx_set_aips(void __iomem *base)
{
unsigned int reg;
/*
* Set all MPROTx to be non-bufferable, trusted for R/W,
* not forced to user-mode.
*/
imx_writel(0x77777777, base + 0x0);
imx_writel(0x77777777, base + 0x4);
/*
* Set all OPACRx to be non-bufferable, to not require
* supervisor privilege level for access, allow for
* write access and untrusted master access.
*/
imx_writel(0x0, base + 0x40);
imx_writel(0x0, base + 0x44);
imx_writel(0x0, base + 0x48);
imx_writel(0x0, base + 0x4C);
reg = imx_readl(base + 0x50) & 0x00FFFFFF;
imx_writel(reg, base + 0x50);
}
void __init imx_aips_allow_unprivileged_access(
const char *compat)
{
void __iomem *aips_base_addr;
struct device_node *np;
for_each_compatible_node(np, NULL, compat) {
aips_base_addr = of_iomap(np, 0);
imx_set_aips(aips_base_addr);
}
}
static unsigned long long __init imx_get_soc_uid(void)
{
struct device_node *np;
void __iomem *ocotp_base;
u64 uid = 0ull;
if (__mxc_cpu_type == MXC_CPU_IMX6DL || __mxc_cpu_type == MXC_CPU_IMX6SX ||
__mxc_cpu_type == MXC_CPU_IMX6Q) {
np = of_find_compatible_node(NULL, NULL, "fsl,imx6q-ocotp");
} else if (__mxc_cpu_type == MXC_CPU_IMX6SL) {
np = of_find_compatible_node(NULL, NULL, "fsl,imx6sl-ocotp");
} else if (__mxc_cpu_type == MXC_CPU_IMX6UL) {
np = of_find_compatible_node(NULL, NULL, "fsl,imx6ul-ocotp");
} else if (__mxc_cpu_type == MXC_CPU_IMX6ULL) {
np = of_find_compatible_node(NULL, NULL, "fsl,imx6ull-ocotp");;
} else if (__mxc_cpu_type == MXC_CPU_IMX7D) {
np = of_find_compatible_node(NULL, NULL, "fsl,imx7d-ocotp");
} else {
return uid;
}
if (!np) {
pr_warn("failed to find ocotp node\n");
return uid;
}
ocotp_base = of_iomap(np, 0);
if (!ocotp_base) {
pr_warn("failed to map ocotp\n");
goto put_node;
}
uid = readl_relaxed(ocotp_base + 0x420);
uid = (uid << 0x20);
uid |= readl_relaxed(ocotp_base + 0x410);
iounmap(ocotp_base);
put_node:
of_node_put(np);
return uid;
}
struct device * __init imx_soc_device_init(void)
{
struct soc_device_attribute *soc_dev_attr;
struct soc_device *soc_dev;
struct device_node *root;
const char *soc_id;
int ret;
soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL);
if (!soc_dev_attr)
return NULL;
soc_dev_attr->family = "Freescale i.MX";
root = of_find_node_by_path("/");
ret = of_property_read_string(root, "model", &soc_dev_attr->machine);
of_node_put(root);
if (ret)
goto free_soc;
switch (__mxc_cpu_type) {
case MXC_CPU_MX1:
soc_id = "i.MX1";
break;
case MXC_CPU_MX21:
soc_id = "i.MX21";
break;
case MXC_CPU_MX25:
soc_id = "i.MX25";
break;
case MXC_CPU_MX27:
soc_id = "i.MX27";
break;
case MXC_CPU_MX31:
soc_id = "i.MX31";
break;
case MXC_CPU_MX35:
soc_id = "i.MX35";
break;
case MXC_CPU_MX51:
soc_id = "i.MX51";
break;
case MXC_CPU_MX53:
soc_id = "i.MX53";
break;
case MXC_CPU_IMX6SL:
soc_dev_attr->unique_id = kasprintf(GFP_KERNEL, "%llx", imx_get_soc_uid());
soc_id = "i.MX6SL";
break;
case MXC_CPU_IMX6DL:
soc_dev_attr->unique_id = kasprintf(GFP_KERNEL, "%llx", imx_get_soc_uid());
soc_id = "i.MX6DL";
break;
case MXC_CPU_IMX6SX:
soc_dev_attr->unique_id = kasprintf(GFP_KERNEL, "%llx", imx_get_soc_uid());
soc_id = "i.MX6SX";
break;
case MXC_CPU_IMX6Q:
soc_dev_attr->unique_id = kasprintf(GFP_KERNEL, "%llx", imx_get_soc_uid());
if (imx_get_soc_revision() >= IMX_CHIP_REVISION_2_0)
soc_id = "i.MX6QP";
else
soc_id = "i.MX6Q";
break;
case MXC_CPU_IMX6UL:
soc_dev_attr->unique_id = kasprintf(GFP_KERNEL, "%llx", imx_get_soc_uid());
soc_id = "i.MX6UL";
break;
case MXC_CPU_IMX6ULL:
soc_dev_attr->unique_id = kasprintf(GFP_KERNEL, "%llx", imx_get_soc_uid());
soc_id = "i.MX6ULL";
break;
case MXC_CPU_IMX6ULZ:
soc_id = "i.MX6ULZ";
break;
case MXC_CPU_IMX6ULZL:
soc_id = "i.MX6ULZL";
break;
case MXC_CPU_IMX7D:
soc_dev_attr->unique_id = kasprintf(GFP_KERNEL, "%llx", imx_get_soc_uid());
soc_id = "i.MX7D";
break;
case MXC_CPU_IMX6SLL:
soc_id = "i.MX6SLL";
break;
case MXC_CPU_IMX7ULP:
soc_id = "i.MX7ULP";
break;
default:
soc_id = "Unknown";
}
soc_dev_attr->soc_id = soc_id;
soc_dev_attr->revision = kasprintf(GFP_KERNEL, "%d.%d",
(imx_soc_revision >> 4) & 0xf,
imx_soc_revision & 0xf);
if (!soc_dev_attr->revision)
goto free_soc;
soc_dev = soc_device_register(soc_dev_attr);
if (IS_ERR(soc_dev))
goto free_rev;
return soc_device_to_device(soc_dev);
free_rev:
kfree(soc_dev_attr->revision);
free_soc:
kfree(soc_dev_attr);
return NULL;
}
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