144 lines
3.7 KiB
C
144 lines
3.7 KiB
C
/*
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* Copyright (C) Guangzhou FriendlyELEC Computer Tech. Co., Ltd.
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* (http://www.friendlyarm.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you can access it online at
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* http://www.gnu.org/licenses/gpl-2.0.html.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/io.h>
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#include <linux/of.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/crc32.h>
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#include <linux/nvmem-consumer.h>
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#define BOARD_MANF "FriendlyELEC Computer Tech. Co., Ltd."
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static const char *board_mach;
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static const char *board_name;
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static u32 board_rev;
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static u32 board_serial_high, board_serial_low;
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static ssize_t board_sys_info_show(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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char *s = buf;
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s += sprintf(s, "Hardware\t: %s\n", board_mach);
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s += sprintf(s, "Revision\t: %04x\n", board_rev);
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s += sprintf(s, "Serial\t\t: %08x%08x\n",
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board_serial_high, board_serial_low);
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s += sprintf(s, "\nModel\t\t: %s\n", board_name);
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s += sprintf(s, "Manufacturer\t: %s\n", BOARD_MANF);
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return (s - buf);
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}
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static struct device_attribute board_attr_info =
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__ATTR(info, S_IRUGO, board_sys_info_show, NULL);
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static int rockchip_cpuinfo_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct nvmem_cell *cell;
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unsigned char *efuse_buf, buf[16];
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size_t len;
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int i;
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cell = nvmem_cell_get(dev, "id");
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if (IS_ERR(cell)) {
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dev_err(dev, "failed to get id cell: %ld\n", PTR_ERR(cell));
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return PTR_ERR(cell);
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}
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efuse_buf = nvmem_cell_read(cell, &len);
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nvmem_cell_put(cell);
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if (len != 16) {
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kfree(efuse_buf);
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dev_err(dev, "invalid id len: %zu\n", len);
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return -EINVAL;
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}
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for (i = 0; i < 8; i++) {
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buf[i] = efuse_buf[1 + (i << 1)];
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buf[i + 8] = efuse_buf[i << 1];
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}
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kfree(efuse_buf);
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board_serial_low = crc32(0, buf, 8);
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board_serial_high = crc32(board_serial_low, buf + 8, 8);
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dev_info(dev, "Serial\t\t: %08x%08x\n",
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board_serial_high, board_serial_low);
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return 0;
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}
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static int board_sys_probe(struct platform_device *pdev)
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{
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struct device_node *np = pdev->dev.of_node;
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struct device_node *root;
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root = of_find_node_by_path("/");
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of_property_read_u32(np, "hwrev", &board_rev);
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if (of_property_read_string(np, "machine", &board_mach))
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of_property_read_string(root, "compatible", &board_mach);
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if (of_property_read_string(np, "model", &board_name))
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of_property_read_string(root, "model", &board_name);
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of_node_put(root);
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rockchip_cpuinfo_probe(pdev);
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device_create_file(&pdev->dev, &board_attr_info);
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return 0;
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}
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static const struct of_device_id board_sys_of_match[] = {
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{ .compatible = "friendlyelec,board" },
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{}
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};
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MODULE_DEVICE_TABLE(of, board_sys_of_match);
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static struct platform_driver board_sys_driver = {
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.probe = board_sys_probe,
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.driver = {
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.name = "friendlyelec-board",
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.of_match_table = board_sys_of_match,
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},
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};
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static int __init board_sys_init(void)
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{
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return platform_driver_register(&board_sys_driver);
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}
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late_initcall(board_sys_init);
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MODULE_AUTHOR("support@friendlyarm.com");
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MODULE_DESCRIPTION("FriendlyElec NanoPi Series Machine Driver");
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MODULE_LICENSE("GPL v2");
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