| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright (C) 2014 Linaro Ltd. |
| * |
| * Author: Linus Walleij <linus.walleij@linaro.org> |
| */ |
| #include <linux/init.h> |
| #include <linux/io.h> |
| #include <linux/slab.h> |
| #include <linux/sys_soc.h> |
| #include <linux/platform_device.h> |
| #include <linux/mfd/syscon.h> |
| #include <linux/regmap.h> |
| #include <linux/of.h> |
| |
| #define INTEGRATOR_HDR_ID_OFFSET 0x00 |
| |
| static u32 integrator_coreid; |
| |
| static const struct of_device_id integrator_cm_match[] = { |
| { .compatible = "arm,core-module-integrator", }, |
| { } |
| }; |
| |
| static const char *integrator_arch_str(u32 id) |
| { |
| switch ((id >> 16) & 0xff) { |
| case 0x00: |
| return "ASB little-endian"; |
| case 0x01: |
| return "AHB little-endian"; |
| case 0x03: |
| return "AHB-Lite system bus, bi-endian"; |
| case 0x04: |
| return "AHB"; |
| case 0x08: |
| return "AHB system bus, ASB processor bus"; |
| default: |
| return "Unknown"; |
| } |
| } |
| |
| static const char *integrator_fpga_str(u32 id) |
| { |
| switch ((id >> 12) & 0xf) { |
| case 0x01: |
| return "XC4062"; |
| case 0x02: |
| return "XC4085"; |
| case 0x03: |
| return "XVC600"; |
| case 0x04: |
| return "EPM7256AE (Altera PLD)"; |
| default: |
| return "Unknown"; |
| } |
| } |
| |
| static ssize_t integrator_get_manf(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| return sprintf(buf, "%02x\n", integrator_coreid >> 24); |
| } |
| |
| static struct device_attribute integrator_manf_attr = |
| __ATTR(manufacturer, S_IRUGO, integrator_get_manf, NULL); |
| |
| static ssize_t integrator_get_arch(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| return sprintf(buf, "%s\n", integrator_arch_str(integrator_coreid)); |
| } |
| |
| static struct device_attribute integrator_arch_attr = |
| __ATTR(arch, S_IRUGO, integrator_get_arch, NULL); |
| |
| static ssize_t integrator_get_fpga(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| return sprintf(buf, "%s\n", integrator_fpga_str(integrator_coreid)); |
| } |
| |
| static struct device_attribute integrator_fpga_attr = |
| __ATTR(fpga, S_IRUGO, integrator_get_fpga, NULL); |
| |
| static ssize_t integrator_get_build(struct device *dev, |
| struct device_attribute *attr, |
| char *buf) |
| { |
| return sprintf(buf, "%02x\n", (integrator_coreid >> 4) & 0xFF); |
| } |
| |
| static struct device_attribute integrator_build_attr = |
| __ATTR(build, S_IRUGO, integrator_get_build, NULL); |
| |
| static int __init integrator_soc_init(void) |
| { |
| static struct regmap *syscon_regmap; |
| struct soc_device *soc_dev; |
| struct soc_device_attribute *soc_dev_attr; |
| struct device_node *np; |
| struct device *dev; |
| u32 val; |
| int ret; |
| |
| np = of_find_matching_node(NULL, integrator_cm_match); |
| if (!np) |
| return -ENODEV; |
| |
| syscon_regmap = syscon_node_to_regmap(np); |
| if (IS_ERR(syscon_regmap)) |
| return PTR_ERR(syscon_regmap); |
| |
| ret = regmap_read(syscon_regmap, INTEGRATOR_HDR_ID_OFFSET, |
| &val); |
| if (ret) |
| return -ENODEV; |
| integrator_coreid = val; |
| |
| soc_dev_attr = kzalloc(sizeof(*soc_dev_attr), GFP_KERNEL); |
| if (!soc_dev_attr) |
| return -ENOMEM; |
| |
| soc_dev_attr->soc_id = "Integrator"; |
| soc_dev_attr->machine = "Integrator"; |
| soc_dev_attr->family = "Versatile"; |
| soc_dev = soc_device_register(soc_dev_attr); |
| if (IS_ERR(soc_dev)) { |
| kfree(soc_dev_attr); |
| return -ENODEV; |
| } |
| dev = soc_device_to_device(soc_dev); |
| |
| device_create_file(dev, &integrator_manf_attr); |
| device_create_file(dev, &integrator_arch_attr); |
| device_create_file(dev, &integrator_fpga_attr); |
| device_create_file(dev, &integrator_build_attr); |
| |
| dev_info(dev, "Detected ARM core module:\n"); |
| dev_info(dev, " Manufacturer: %02x\n", (val >> 24)); |
| dev_info(dev, " Architecture: %s\n", integrator_arch_str(val)); |
| dev_info(dev, " FPGA: %s\n", integrator_fpga_str(val)); |
| dev_info(dev, " Build: %02x\n", (val >> 4) & 0xFF); |
| dev_info(dev, " Rev: %c\n", ('A' + (val & 0x03))); |
| |
| return 0; |
| } |
| device_initcall(integrator_soc_init); |