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