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758 lines
23 KiB
C
758 lines
23 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Driver for MikroTik RouterBoot hard config.
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*
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* Copyright (C) 2020 Thibaut VARÈNE <hacks+kernel@slashdirt.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation.
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*
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* This driver exposes the data encoded in the "hard_config" flash segment of
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* MikroTik RouterBOARDs devices. It presents the data in a sysfs folder
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* named "hard_config". The WLAN calibration data is available on demand via
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* the 'wlan_data' sysfs file in that folder.
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*
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* This driver permanently allocates a chunk of RAM as large as the hard_config
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* MTD partition, although it is technically possible to operate entirely from
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* the MTD device without using a local buffer (except when requesting WLAN
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* calibration data), at the cost of a performance penalty.
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*
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* Some constant defines extracted from routerboot.{c,h} by Gabor Juhos
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* <juhosg@openwrt.org>
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*/
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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/errno.h>
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#include <linux/kobject.h>
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#include <linux/bitops.h>
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#include <linux/string.h>
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#include <linux/mtd/mtd.h>
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#include <linux/sysfs.h>
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#include <linux/lzo.h>
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#include "routerboot.h"
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#define RB_HARDCONFIG_VER "0.03"
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#define RB_HC_PR_PFX "[rb_hardconfig] "
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/* ID values for hardware settings */
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#define RB_ID_FLASH_INFO 0x03
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#define RB_ID_MAC_ADDRESS_PACK 0x04
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#define RB_ID_BOARD_PRODUCT_CODE 0x05
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#define RB_ID_BIOS_VERSION 0x06
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#define RB_ID_SDRAM_TIMINGS 0x08
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#define RB_ID_DEVICE_TIMINGS 0x09
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#define RB_ID_SOFTWARE_ID 0x0A
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#define RB_ID_SERIAL_NUMBER 0x0B
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#define RB_ID_MEMORY_SIZE 0x0D
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#define RB_ID_MAC_ADDRESS_COUNT 0x0E
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#define RB_ID_HW_OPTIONS 0x15
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#define RB_ID_WLAN_DATA 0x16
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#define RB_ID_BOARD_IDENTIFIER 0x17
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#define RB_ID_PRODUCT_NAME 0x21
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#define RB_ID_DEFCONF 0x26
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/* Bit definitions for hardware options */
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#define RB_HW_OPT_NO_UART BIT(0)
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#define RB_HW_OPT_HAS_VOLTAGE BIT(1)
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#define RB_HW_OPT_HAS_USB BIT(2)
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#define RB_HW_OPT_HAS_ATTINY BIT(3)
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#define RB_HW_OPT_PULSE_DUTY_CYCLE BIT(9)
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#define RB_HW_OPT_NO_NAND BIT(14)
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#define RB_HW_OPT_HAS_LCD BIT(15)
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#define RB_HW_OPT_HAS_POE_OUT BIT(16)
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#define RB_HW_OPT_HAS_uSD BIT(17)
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#define RB_HW_OPT_HAS_SIM BIT(18)
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#define RB_HW_OPT_HAS_SFP BIT(20)
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#define RB_HW_OPT_HAS_WIFI BIT(21)
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#define RB_HW_OPT_HAS_TS_FOR_ADC BIT(22)
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#define RB_HW_OPT_HAS_PLC BIT(29)
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static struct kobject *hc_kobj;
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static u8 *hc_buf; // ro buffer after init(): no locking required
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static size_t hc_buflen;
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/*
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* For LZOR style WLAN data unpacking.
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* This binary blob is prepended to the data encoded on some devices as
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* RB_ID_WLAN_DATA, the result is then first decompressed with LZO, and then
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* finally RLE-decoded.
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* This binary blob has been extracted from RouterOS by
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* https://forum.openwrt.org/u/ius
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*/
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static const u8 hc_lzor_prefix[] = {
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0x00, 0x05, 0x4c, 0x4c, 0x44, 0x00, 0x34, 0xfe,
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0xfe, 0x34, 0x11, 0x3c, 0x1e, 0x3c, 0x2e, 0x3c,
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0x4c, 0x34, 0x00, 0x52, 0x62, 0x92, 0xa2, 0xb2,
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0xc3, 0x2a, 0x14, 0x00, 0x00, 0x05, 0xfe, 0x6a,
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0x3c, 0x16, 0x32, 0x16, 0x11, 0x1e, 0x12, 0x46,
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0x32, 0x46, 0x11, 0x4e, 0x12, 0x36, 0x32, 0x36,
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0x11, 0x3e, 0x12, 0x5a, 0x9a, 0x64, 0x00, 0x04,
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0xfe, 0x10, 0x3c, 0x00, 0x01, 0x00, 0x00, 0x28,
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0x0c, 0x00, 0x0f, 0xfe, 0x14, 0x00, 0x24, 0x24,
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0x23, 0x24, 0x24, 0x23, 0x25, 0x22, 0x21, 0x21,
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0x23, 0x22, 0x21, 0x22, 0x21, 0x2d, 0x38, 0x00,
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0x0c, 0x25, 0x25, 0x24, 0x25, 0x25, 0x24, 0x23,
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0x22, 0x21, 0x20, 0x23, 0x21, 0x21, 0x22, 0x21,
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0x2d, 0x38, 0x00, 0x28, 0xb0, 0x00, 0x00, 0x22,
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0x00, 0x00, 0xc0, 0xfe, 0x03, 0x00, 0xc0, 0x00,
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0x62, 0xff, 0x62, 0xff, 0xfe, 0x06, 0x00, 0xbb,
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0xff, 0xba, 0xff, 0xfe, 0x08, 0x00, 0x9e, 0xff,
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0xfe, 0x0a, 0x00, 0x53, 0xff, 0xfe, 0x02, 0x00,
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0x20, 0xff, 0xb1, 0xfe, 0xfe, 0xb2, 0xfe, 0xfe,
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0xed, 0xfe, 0xfe, 0xfe, 0x04, 0x00, 0x3a, 0xff,
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0x3a, 0xff, 0xde, 0xfd, 0x5f, 0x04, 0x33, 0xff,
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0x4c, 0x74, 0x03, 0x05, 0x05, 0xff, 0x6d, 0xfe,
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0xfe, 0x6d, 0xfe, 0xfe, 0xaf, 0x08, 0x63, 0xff,
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0x64, 0x6f, 0x08, 0xac, 0xff, 0xbf, 0x6d, 0x08,
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0x7a, 0x6d, 0x08, 0x96, 0x74, 0x04, 0x00, 0x08,
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0x79, 0xff, 0xda, 0xfe, 0xfe, 0xdb, 0xfe, 0xfe,
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0x56, 0xff, 0xfe, 0x04, 0x00, 0x5e, 0xff, 0x5e,
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0xff, 0x6c, 0xfe, 0xfe, 0xfe, 0x06, 0x00, 0x41,
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0xff, 0x7f, 0x74, 0x03, 0x00, 0x11, 0x44, 0xff,
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0xa9, 0xfe, 0xfe, 0xa9, 0xfe, 0xfe, 0xa5, 0x8f,
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0x01, 0x00, 0x08, 0x01, 0x01, 0x02, 0x04, 0x08,
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0x02, 0x04, 0x08, 0x08, 0x01, 0x01, 0xfe, 0x22,
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0x00, 0x4c, 0x60, 0x64, 0x8c, 0x90, 0xd0, 0xd4,
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0xd8, 0x5c, 0x10, 0x09, 0xd8, 0xff, 0xb0, 0xff,
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0x00, 0x00, 0xba, 0xff, 0x14, 0x00, 0xba, 0xff,
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0x64, 0x00, 0x00, 0x08, 0xfe, 0x06, 0x00, 0x74,
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0xff, 0x42, 0xff, 0xce, 0xff, 0x60, 0xff, 0x0a,
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0x00, 0xb4, 0x00, 0xa0, 0x00, 0xa0, 0xfe, 0x07,
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0x00, 0x0a, 0x00, 0xb0, 0xff, 0x96, 0x4d, 0x00,
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0x56, 0x57, 0x18, 0xa6, 0xff, 0x92, 0x70, 0x11,
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0x00, 0x12, 0x90, 0x90, 0x76, 0x5a, 0x54, 0x54,
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0x4c, 0x46, 0x38, 0x00, 0x10, 0x10, 0x08, 0xfe,
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0x05, 0x00, 0x38, 0x29, 0x25, 0x23, 0x22, 0x22,
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0x1f, 0x00, 0x00, 0x00, 0xf6, 0xe1, 0xdd, 0xf8,
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0xfe, 0x00, 0xfe, 0x15, 0x00, 0x00, 0xd0, 0x02,
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0x74, 0x02, 0x08, 0xf8, 0xe5, 0xde, 0x02, 0x04,
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0x04, 0xfd, 0x00, 0x00, 0x00, 0x07, 0x50, 0x2d,
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0x01, 0x90, 0x90, 0x76, 0x60, 0xb0, 0x07, 0x07,
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0x0c, 0x0c, 0x04, 0xfe, 0x05, 0x00, 0x66, 0x66,
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0x5a, 0x56, 0xbc, 0x01, 0x06, 0xfc, 0xfc, 0xf1,
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0xfe, 0x07, 0x00, 0x24, 0x95, 0x70, 0x64, 0x18,
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0x06, 0x2c, 0xff, 0xb5, 0xfe, 0xfe, 0xb5, 0xfe,
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0xfe, 0xe2, 0x8c, 0x24, 0x02, 0x2f, 0xff, 0x2f,
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0xff, 0xb4, 0x78, 0x02, 0x05, 0x73, 0xff, 0xed,
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0xfe, 0xfe, 0x4f, 0xff, 0x36, 0x74, 0x1e, 0x09,
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0x4f, 0xff, 0x50, 0xff, 0xfe, 0x16, 0x00, 0x70,
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0xac, 0x70, 0x8e, 0xac, 0x40, 0x0e, 0x01, 0x70,
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0x7f, 0x8e, 0xac, 0x6c, 0x00, 0x0b, 0xfe, 0x02,
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0x00, 0xfe, 0x0a, 0x2c, 0x2a, 0x2a, 0x28, 0x26,
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0x1e, 0x1e, 0xfe, 0x02, 0x20, 0x65, 0x20, 0x00,
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0x00, 0x05, 0x12, 0x00, 0x11, 0x1e, 0x11, 0x11,
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0x41, 0x1e, 0x41, 0x11, 0x31, 0x1e, 0x31, 0x11,
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0x70, 0x75, 0x7a, 0x7f, 0x84, 0x89, 0x8e, 0x93,
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0x98, 0x30, 0x20, 0x00, 0x02, 0x00, 0xfe, 0x06,
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0x3c, 0xbc, 0x32, 0x0c, 0x00, 0x00, 0x2a, 0x12,
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0x1e, 0x12, 0x2e, 0x12, 0xcc, 0x12, 0x11, 0x1a,
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0x1e, 0x1a, 0x2e, 0x1a, 0x4c, 0x10, 0x1e, 0x10,
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0x11, 0x18, 0x1e, 0x42, 0x1e, 0x42, 0x2e, 0x42,
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0xcc, 0x42, 0x11, 0x4a, 0x1e, 0x4a, 0x2e, 0x4a,
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0x4c, 0x40, 0x1e, 0x40, 0x11, 0x48, 0x1e, 0x32,
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0x1e, 0x32, 0x2e, 0x32, 0xcc, 0x32, 0x11, 0x3a,
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0x1e, 0x3a, 0x2e, 0x3a, 0x4c, 0x30, 0x1e, 0x30,
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0x11, 0x38, 0x1e, 0x27, 0x9a, 0x01, 0x9d, 0xa2,
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0x2f, 0x28, 0x00, 0x00, 0x46, 0xde, 0xc4, 0xbf,
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0xa6, 0x9d, 0x81, 0x7b, 0x5c, 0x61, 0x40, 0xc7,
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0xc0, 0xae, 0xa9, 0x8c, 0x83, 0x6a, 0x62, 0x50,
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0x3e, 0xce, 0xc2, 0xae, 0xa3, 0x8c, 0x7b, 0x6a,
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0x5a, 0x50, 0x35, 0xd7, 0xc2, 0xb7, 0xa4, 0x95,
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0x7e, 0x72, 0x5a, 0x59, 0x37, 0xfe, 0x02, 0xf8,
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0x8c, 0x95, 0x90, 0x8f, 0x00, 0xd7, 0xc0, 0xb7,
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0xa2, 0x95, 0x7b, 0x72, 0x56, 0x59, 0x32, 0xc7,
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0xc3, 0xae, 0xad, 0x8c, 0x85, 0x6a, 0x63, 0x50,
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0x3e, 0xce, 0xc3, 0xae, 0xa4, 0x8c, 0x7c, 0x6a,
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0x59, 0x50, 0x34, 0xd7, 0xc2, 0xb7, 0xa5, 0x95,
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0x7e, 0x72, 0x59, 0x59, 0x36, 0xfc, 0x05, 0x00,
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0x02, 0xce, 0xc5, 0xae, 0xa5, 0x95, 0x83, 0x72,
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0x5c, 0x59, 0x36, 0xbf, 0xc6, 0xa5, 0xab, 0x8c,
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0x8c, 0x6a, 0x67, 0x50, 0x41, 0x64, 0x07, 0x00,
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0x02, 0x95, 0x8c, 0x72, 0x65, 0x59, 0x3f, 0xce,
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0xc7, 0xae, 0xa8, 0x95, 0x86, 0x72, 0x5f, 0x59,
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0x39, 0xfe, 0x02, 0xf8, 0x8b, 0x7c, 0x0b, 0x09,
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0xb7, 0xc2, 0x9d, 0xa4, 0x83, 0x85, 0x6a, 0x6b,
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0x50, 0x44, 0xb7, 0xc1, 0x64, 0x01, 0x00, 0x06,
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0x61, 0x5d, 0x48, 0x3d, 0xae, 0xc4, 0x9d, 0xad,
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0x7b, 0x85, 0x61, 0x66, 0x48, 0x46, 0xae, 0xc3,
|
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0x95, 0xa3, 0x72, 0x7c, 0x59, 0x56, 0x38, 0x31,
|
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0x7c, 0x0b, 0x00, 0x0c, 0x96, 0x91, 0x8f, 0x00,
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0xb7, 0xc0, 0xa5, 0xab, 0x8c, 0x8a, 0x6a, 0x64,
|
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0x50, 0x3c, 0xb7, 0xc0, 0x9d, 0xa0, 0x83, 0x80,
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0x6a, 0x64, 0x50, 0x3d, 0xb7, 0xc5, 0x9d, 0xa5,
|
|
0x83, 0x87, 0x6c, 0x08, 0x07, 0xae, 0xc0, 0x9d,
|
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0xa8, 0x83, 0x88, 0x6a, 0x6d, 0x50, 0x46, 0xfc,
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0x05, 0x00, 0x16, 0xbf, 0xc0, 0xa5, 0xa2, 0x8c,
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0x7f, 0x6a, 0x57, 0x50, 0x2f, 0xb7, 0xc7, 0xa5,
|
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0xb1, 0x8c, 0x8e, 0x72, 0x6d, 0x59, 0x45, 0xbf,
|
|
0xc6, 0xa5, 0xa8, 0x8c, 0x87, 0x6a, 0x5f, 0x50,
|
|
0x37, 0xbf, 0xc2, 0xa5, 0xa4, 0x8c, 0x83, 0x6a,
|
|
0x5c, 0x50, 0x34, 0xbc, 0x05, 0x00, 0x0e, 0x90,
|
|
0x00, 0xc7, 0xc2, 0xae, 0xaa, 0x95, 0x82, 0x7b,
|
|
0x60, 0x61, 0x3f, 0xb7, 0xc6, 0xa5, 0xb1, 0x8c,
|
|
0x8d, 0x72, 0x6b, 0x61, 0x51, 0xbf, 0xc4, 0xa5,
|
|
0xa5, 0x8c, 0x82, 0x72, 0x61, 0x59, 0x39, 0x6c,
|
|
0x26, 0x03, 0x95, 0x82, 0x7b, 0x61, 0x61, 0x40,
|
|
0xfc, 0x05, 0x00, 0x00, 0x7e, 0xd7, 0xc3, 0xb7,
|
|
0xa8, 0x9d, 0x80, 0x83, 0x5d, 0x6a, 0x3f, 0xbf,
|
|
0xc7, 0xa5, 0xa8, 0x8c, 0x84, 0x72, 0x60, 0x61,
|
|
0x46, 0xbf, 0xc2, 0xae, 0xb0, 0x9d, 0x92, 0x83,
|
|
0x6f, 0x6a, 0x50, 0xd7, 0xc3, 0xb7, 0xa7, 0x9d,
|
|
0x80, 0x83, 0x5e, 0x6a, 0x40, 0xfe, 0x02, 0xf8,
|
|
0x8d, 0x96, 0x90, 0x90, 0xfe, 0x05, 0x00, 0x8a,
|
|
0xc4, 0x63, 0xb8, 0x3c, 0xa6, 0x29, 0x97, 0x16,
|
|
0x81, 0x84, 0xb7, 0x5b, 0xa9, 0x33, 0x94, 0x1e,
|
|
0x83, 0x11, 0x70, 0xb8, 0xc2, 0x70, 0xb1, 0x4d,
|
|
0xa3, 0x2a, 0x8d, 0x1b, 0x7b, 0xa8, 0xbc, 0x68,
|
|
0xab, 0x47, 0x9d, 0x27, 0x87, 0x18, 0x75, 0xae,
|
|
0xc6, 0x7d, 0xbb, 0x4d, 0xaa, 0x1c, 0x84, 0x11,
|
|
0x72, 0xa3, 0xbb, 0x6e, 0xad, 0x3c, 0x97, 0x24,
|
|
0x85, 0x16, 0x71, 0x80, 0xb2, 0x57, 0xa4, 0x30,
|
|
0x8e, 0x1c, 0x7c, 0x10, 0x68, 0xbb, 0xbd, 0x75,
|
|
0xac, 0x4f, 0x9e, 0x2b, 0x87, 0x1a, 0x76, 0x96,
|
|
0xc5, 0x5e, 0xb5, 0x3e, 0xa5, 0x1f, 0x8c, 0x12,
|
|
0x7a, 0xc1, 0xc6, 0x42, 0x9f, 0x27, 0x8c, 0x16,
|
|
0x77, 0x0f, 0x67, 0x9d, 0xbc, 0x68, 0xad, 0x36,
|
|
0x95, 0x20, 0x83, 0x11, 0x6d, 0x9b, 0xb8, 0x67,
|
|
0xa8, 0x34, 0x90, 0x1f, 0x7c, 0x10, 0x67, 0x9e,
|
|
0xc9, 0x6a, 0xbb, 0x37, 0xa4, 0x20, 0x90, 0x11,
|
|
0x7b, 0xc6, 0xc8, 0x47, 0xa4, 0x2a, 0x90, 0x18,
|
|
0x7b, 0x10, 0x6c, 0xae, 0xc4, 0x5d, 0xad, 0x37,
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|
0x9a, 0x1f, 0x85, 0x13, 0x75, 0x70, 0xad, 0x42,
|
|
0x99, 0x25, 0x84, 0x17, 0x74, 0x0b, 0x56, 0x87,
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|
0xc8, 0x57, 0xb8, 0x2b, 0x9e, 0x19, 0x8a, 0x0d,
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|
0x74, 0xa7, 0xc8, 0x6e, 0xb9, 0x36, 0xa0, 0x1f,
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0x8b, 0x11, 0x75, 0x94, 0xbe, 0x4b, 0xa5, 0x2a,
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|
0x92, 0x18, 0x7c, 0x0f, 0x6b, 0xaf, 0xc0, 0x58,
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|
0xa8, 0x34, 0x94, 0x1d, 0x7d, 0x12, 0x6d, 0x82,
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|
0xc0, 0x52, 0xb0, 0x25, 0x94, 0x14, 0x7f, 0x0c,
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0x68, 0x84, 0xbf, 0x3e, 0xa4, 0x22, 0x8e, 0x10,
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|
0x76, 0x0b, 0x65, 0x88, 0xb6, 0x42, 0x9b, 0x26,
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|
0x87, 0x14, 0x70, 0x0c, 0x5f, 0xc5, 0xc2, 0x3e,
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0x97, 0x23, 0x83, 0x13, 0x6c, 0x0c, 0x5c, 0xb1,
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0xc9, 0x76, 0xbc, 0x4a, 0xaa, 0x20, 0x8d, 0x12,
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|
0x78, 0x93, 0xbf, 0x46, 0xa3, 0x26, 0x8d, 0x14,
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|
0x74, 0x0c, 0x62, 0xc8, 0xc4, 0x3b, 0x97, 0x21,
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0x82, 0x11, 0x6a, 0x0a, 0x59, 0xa3, 0xb9, 0x68,
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0xa9, 0x30, 0x8d, 0x1a, 0x78, 0x0f, 0x61, 0xa0,
|
|
0xc9, 0x73, 0xbe, 0x50, 0xb1, 0x30, 0x9f, 0x14,
|
|
0x80, 0x83, 0xb7, 0x3c, 0x9a, 0x20, 0x84, 0x0e,
|
|
0x6a, 0x0a, 0x57, 0xac, 0xc2, 0x68, 0xb0, 0x2e,
|
|
0x92, 0x19, 0x7c, 0x0d, 0x63, 0x93, 0xbe, 0x62,
|
|
0xb0, 0x3c, 0x9e, 0x1a, 0x80, 0x0e, 0x6b, 0xbb,
|
|
0x02, 0xa0, 0x02, 0xa0, 0x02, 0x6f, 0x00, 0x75,
|
|
0x00, 0x75, 0x00, 0x00, 0x00, 0xad, 0x02, 0xb3,
|
|
0x02, 0x6f, 0x00, 0x87, 0x00, 0x85, 0xfe, 0x03,
|
|
0x00, 0xc2, 0x02, 0x82, 0x4d, 0x92, 0x6e, 0x4d,
|
|
0xb1, 0xa8, 0x84, 0x01, 0x00, 0x07, 0x7e, 0x00,
|
|
0xa8, 0x02, 0xa4, 0x02, 0xa4, 0x02, 0xa2, 0x00,
|
|
0xa6, 0x00, 0xa6, 0x00, 0x00, 0x00, 0xb4, 0x02,
|
|
0xb4, 0x02, 0x92, 0x00, 0x96, 0x00, 0x96, 0x46,
|
|
0x04, 0xb0, 0x02, 0x64, 0x02, 0x0a, 0x8c, 0x00,
|
|
0x90, 0x02, 0x98, 0x02, 0x98, 0x02, 0x0e, 0x01,
|
|
0x11, 0x01, 0x11, 0x50, 0xc3, 0x08, 0x88, 0x02,
|
|
0x88, 0x02, 0x19, 0x01, 0x02, 0x01, 0x02, 0x01,
|
|
0xf3, 0x2d, 0x00, 0x00
|
|
};
|
|
|
|
/* Array of known hw_options bits with human-friendly parsing */
|
|
static struct hc_hwopt {
|
|
const u32 bit;
|
|
const char *str;
|
|
} const hc_hwopts[] = {
|
|
{
|
|
.bit = RB_HW_OPT_NO_UART,
|
|
.str = "no UART\t\t",
|
|
}, {
|
|
.bit = RB_HW_OPT_HAS_VOLTAGE,
|
|
.str = "has Vreg\t",
|
|
}, {
|
|
.bit = RB_HW_OPT_HAS_USB,
|
|
.str = "has usb\t\t",
|
|
}, {
|
|
.bit = RB_HW_OPT_HAS_ATTINY,
|
|
.str = "has ATtiny\t",
|
|
}, {
|
|
.bit = RB_HW_OPT_NO_NAND,
|
|
.str = "no NAND\t\t",
|
|
}, {
|
|
.bit = RB_HW_OPT_HAS_LCD,
|
|
.str = "has LCD\t\t",
|
|
}, {
|
|
.bit = RB_HW_OPT_HAS_POE_OUT,
|
|
.str = "has POE out\t",
|
|
}, {
|
|
.bit = RB_HW_OPT_HAS_uSD,
|
|
.str = "has MicroSD\t",
|
|
}, {
|
|
.bit = RB_HW_OPT_HAS_SIM,
|
|
.str = "has SIM\t\t",
|
|
}, {
|
|
.bit = RB_HW_OPT_HAS_SFP,
|
|
.str = "has SFP\t\t",
|
|
}, {
|
|
.bit = RB_HW_OPT_HAS_WIFI,
|
|
.str = "has WiFi\t",
|
|
}, {
|
|
.bit = RB_HW_OPT_HAS_TS_FOR_ADC,
|
|
.str = "has TS ADC\t",
|
|
}, {
|
|
.bit = RB_HW_OPT_HAS_PLC,
|
|
.str = "has PLC\t\t",
|
|
},
|
|
};
|
|
|
|
static ssize_t hc_tag_show_string(const u8 *pld, u16 pld_len, char *buf)
|
|
{
|
|
return snprintf(buf, pld_len+1, "%s\n", pld);
|
|
}
|
|
|
|
static ssize_t hc_tag_show_u32(const u8 *pld, u16 pld_len, char *buf)
|
|
{
|
|
char *out = buf;
|
|
u32 data; // cpu-endian
|
|
|
|
/* Caller ensures pld_len > 0 */
|
|
if (pld_len % sizeof(data))
|
|
return -EINVAL;
|
|
|
|
data = *(u32 *)pld;
|
|
|
|
do {
|
|
out += sprintf(out, "0x%08x\n", data);
|
|
data++;
|
|
} while ((pld_len -= sizeof(data)));
|
|
|
|
return out - buf;
|
|
}
|
|
|
|
/*
|
|
* The MAC is stored network-endian on all devices, in 2 32-bit segments:
|
|
* <XX:XX:XX:XX> <XX:XX:00:00>. Kernel print has us covered.
|
|
*/
|
|
static ssize_t hc_tag_show_mac(const u8 *pld, u16 pld_len, char *buf)
|
|
{
|
|
if (8 != pld_len)
|
|
return -EINVAL;
|
|
|
|
return sprintf(buf, "%pM\n", pld);
|
|
}
|
|
|
|
/*
|
|
* Print HW options in a human readable way:
|
|
* The raw number and in decoded form
|
|
*/
|
|
static ssize_t hc_tag_show_hwoptions(const u8 *pld, u16 pld_len, char *buf)
|
|
{
|
|
char *out = buf;
|
|
u32 data; // cpu-endian
|
|
int i;
|
|
|
|
if (sizeof(data) != pld_len)
|
|
return -EINVAL;
|
|
|
|
data = *(u32 *)pld;
|
|
out += sprintf(out, "raw\t\t: 0x%08x\n\n", data);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(hc_hwopts); i++)
|
|
out += sprintf(out, "%s: %s\n", hc_hwopts[i].str,
|
|
(data & hc_hwopts[i].bit) ? "true" : "false");
|
|
|
|
return out - buf;
|
|
}
|
|
|
|
static ssize_t hc_wlan_data_bin_read(struct file *filp, struct kobject *kobj,
|
|
struct bin_attribute *attr, char *buf,
|
|
loff_t off, size_t count);
|
|
|
|
static struct hc_wlan_attr {
|
|
struct bin_attribute battr;
|
|
u16 pld_ofs;
|
|
u16 pld_len;
|
|
} hc_wlandata_battr = {
|
|
.battr = __BIN_ATTR(wlan_data, S_IRUSR, hc_wlan_data_bin_read, NULL, 0),
|
|
};
|
|
|
|
static ssize_t hc_attr_show(struct kobject *kobj, struct kobj_attribute *attr,
|
|
char *buf);
|
|
|
|
/* Array of known tags to publish in sysfs */
|
|
static struct hc_attr {
|
|
const u16 tag_id;
|
|
ssize_t (* const tshow)(const u8 *pld, u16 pld_len, char *buf);
|
|
struct kobj_attribute kattr;
|
|
u16 pld_ofs;
|
|
u16 pld_len;
|
|
} hc_attrs[] = {
|
|
{
|
|
.tag_id = RB_ID_FLASH_INFO,
|
|
.tshow = hc_tag_show_u32,
|
|
.kattr = __ATTR(flash_info, S_IRUSR, hc_attr_show, NULL),
|
|
}, {
|
|
.tag_id = RB_ID_MAC_ADDRESS_PACK,
|
|
.tshow = hc_tag_show_mac,
|
|
.kattr = __ATTR(mac_base, S_IRUSR, hc_attr_show, NULL),
|
|
}, {
|
|
.tag_id = RB_ID_BOARD_PRODUCT_CODE,
|
|
.tshow = hc_tag_show_string,
|
|
.kattr = __ATTR(board_product_code, S_IRUSR, hc_attr_show, NULL),
|
|
}, {
|
|
.tag_id = RB_ID_BIOS_VERSION,
|
|
.tshow = hc_tag_show_string,
|
|
.kattr = __ATTR(booter_version, S_IRUSR, hc_attr_show, NULL),
|
|
}, {
|
|
.tag_id = RB_ID_SERIAL_NUMBER,
|
|
.tshow = hc_tag_show_string,
|
|
.kattr = __ATTR(board_serial, S_IRUSR, hc_attr_show, NULL),
|
|
}, {
|
|
.tag_id = RB_ID_MEMORY_SIZE,
|
|
.tshow = hc_tag_show_u32,
|
|
.kattr = __ATTR(mem_size, S_IRUSR, hc_attr_show, NULL),
|
|
}, {
|
|
.tag_id = RB_ID_MAC_ADDRESS_COUNT,
|
|
.tshow = hc_tag_show_u32,
|
|
.kattr = __ATTR(mac_count, S_IRUSR, hc_attr_show, NULL),
|
|
}, {
|
|
.tag_id = RB_ID_HW_OPTIONS,
|
|
.tshow = hc_tag_show_hwoptions,
|
|
.kattr = __ATTR(hw_options, S_IRUSR, hc_attr_show, NULL),
|
|
}, {
|
|
.tag_id = RB_ID_WLAN_DATA,
|
|
.tshow = NULL,
|
|
}, {
|
|
.tag_id = RB_ID_BOARD_IDENTIFIER,
|
|
.tshow = hc_tag_show_string,
|
|
.kattr = __ATTR(board_identifier, S_IRUSR, hc_attr_show, NULL),
|
|
}, {
|
|
.tag_id = RB_ID_PRODUCT_NAME,
|
|
.tshow = hc_tag_show_string,
|
|
.kattr = __ATTR(product_name, S_IRUSR, hc_attr_show, NULL),
|
|
}, {
|
|
.tag_id = RB_ID_DEFCONF,
|
|
.tshow = hc_tag_show_string,
|
|
.kattr = __ATTR(defconf, S_IRUSR, hc_attr_show, NULL),
|
|
}
|
|
};
|
|
|
|
/*
|
|
* If the RB_ID_WLAN_DATA payload starts with RB_MAGIC_ERD, then past
|
|
* that magic number the payload itself contains a routerboot tag node
|
|
* locating the LZO-compressed calibration data at id 0x1.
|
|
*/
|
|
static int hc_wlan_data_unpack_erd(const u8 *inbuf, size_t inlen,
|
|
void *outbuf, size_t *outlen)
|
|
{
|
|
u16 lzo_ofs, lzo_len;
|
|
int ret;
|
|
|
|
/* Find embedded tag */
|
|
ret = routerboot_tag_find(inbuf, inlen, 0x1, // always id 1
|
|
&lzo_ofs, &lzo_len);
|
|
if (ret) {
|
|
pr_debug(RB_HC_PR_PFX "ERD data not found\n");
|
|
goto fail;
|
|
}
|
|
|
|
if (lzo_len > inlen) {
|
|
pr_debug(RB_HC_PR_PFX "Invalid ERD data length\n");
|
|
ret = -EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
ret = lzo1x_decompress_safe(inbuf+lzo_ofs, lzo_len, outbuf, outlen);
|
|
if (ret)
|
|
pr_debug(RB_HC_PR_PFX "LZO decompression error (%d)\n", ret);
|
|
|
|
fail:
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* If the RB_ID_WLAN_DATA payload starts with RB_MAGIC_LZOR, then past
|
|
* that magic number is a payload that must be appended to the hc_lzor_prefix,
|
|
* the resulting blob is LZO-compressed. In the LZO decompression result,
|
|
* the RB_MAGIC_ERD magic number (aligned) must be located. Following that
|
|
* magic, there is a routerboot tag node (id 0x1) locating the RLE-encoded
|
|
* calibration data payload.
|
|
*/
|
|
static int hc_wlan_data_unpack_lzor(const u8 *inbuf, size_t inlen,
|
|
void *outbuf, size_t *outlen)
|
|
{
|
|
u16 rle_ofs, rle_len;
|
|
const u32 *needle;
|
|
u8 *tempbuf;
|
|
size_t templen, lzo_len;
|
|
int ret;
|
|
|
|
lzo_len = inlen + sizeof(hc_lzor_prefix);
|
|
if (lzo_len > *outlen)
|
|
return -EFBIG;
|
|
|
|
/* Temporary buffer same size as the outbuf */
|
|
templen = *outlen;
|
|
tempbuf = kmalloc(templen, GFP_KERNEL);
|
|
if (!outbuf)
|
|
return -ENOMEM;
|
|
|
|
/* Concatenate into the outbuf */
|
|
memcpy(outbuf, hc_lzor_prefix, sizeof(hc_lzor_prefix));
|
|
memcpy(outbuf + sizeof(hc_lzor_prefix), inbuf, inlen);
|
|
|
|
/* LZO-decompress lzo_len bytes of outbuf into the tempbuf */
|
|
ret = lzo1x_decompress_safe(outbuf, lzo_len, tempbuf, &templen);
|
|
if (ret) {
|
|
if (LZO_E_INPUT_NOT_CONSUMED == ret) {
|
|
/*
|
|
* It is assumed that because the LZO payload is embedded
|
|
* in a "root" RB_ID_WLAN_DATA tag, the tag length is aligned
|
|
* and the payload is padded at the end, which triggers a
|
|
* spurious error which we ignore here.
|
|
*/
|
|
pr_debug(RB_HC_PR_PFX "LZOR: LZO EOF before buffer end - this may be harmless\n");
|
|
} else {
|
|
pr_debug(RB_HC_PR_PFX "LZOR: LZO decompression error (%d)\n", ret);
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Post decompression we have a blob (possibly byproduct of the lzo
|
|
* dictionary). We need to find RB_MAGIC_ERD. The magic number seems to
|
|
* be 32bit-aligned in the decompression output.
|
|
*/
|
|
needle = (const u32 *)tempbuf;
|
|
while (RB_MAGIC_ERD != *needle++) {
|
|
if ((u8 *)needle >= tempbuf+templen) {
|
|
pr_debug(RB_HC_PR_PFX "LZOR: ERD magic not found\n");
|
|
goto fail;
|
|
}
|
|
};
|
|
templen -= (u8 *)needle - tempbuf;
|
|
|
|
/* Past magic. Look for tag node */
|
|
ret = routerboot_tag_find((u8 *)needle, templen, 0x1, &rle_ofs, &rle_len);
|
|
if (ret) {
|
|
pr_debug(RB_HC_PR_PFX "LZOR: RLE data not found\n");
|
|
goto fail;
|
|
}
|
|
|
|
if (rle_len > templen) {
|
|
pr_debug(RB_HC_PR_PFX "LZOR: Invalid RLE data length\n");
|
|
ret = -EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
/* RLE-decode tempbuf from needle back into the outbuf */
|
|
ret = routerboot_rle_decode((u8 *)needle+rle_ofs, rle_len, outbuf, outlen);
|
|
if (ret)
|
|
pr_debug(RB_HC_PR_PFX "LZOR: RLE decoding error (%d)\n", ret);
|
|
|
|
fail:
|
|
kfree(tempbuf);
|
|
return ret;
|
|
}
|
|
|
|
static int hc_wlan_data_unpack(const size_t tofs, size_t tlen,
|
|
void *outbuf, size_t *outlen)
|
|
{
|
|
const u8 *lbuf;
|
|
u32 magic;
|
|
int ret;
|
|
|
|
/* Caller ensure tlen > 0. tofs is aligned */
|
|
if ((tofs + tlen) > hc_buflen)
|
|
return -EIO;
|
|
|
|
lbuf = hc_buf + tofs;
|
|
magic = *(u32 *)lbuf;
|
|
|
|
ret = -ENODATA;
|
|
switch (magic) {
|
|
case RB_MAGIC_LZOR:
|
|
/* Skip magic */
|
|
lbuf += sizeof(magic);
|
|
tlen -= sizeof(magic);
|
|
ret = hc_wlan_data_unpack_lzor(lbuf, tlen, outbuf, outlen);
|
|
break;
|
|
case RB_MAGIC_ERD:
|
|
/* Skip magic */
|
|
lbuf += sizeof(magic);
|
|
tlen -= sizeof(magic);
|
|
ret = hc_wlan_data_unpack_erd(lbuf, tlen, outbuf, outlen);
|
|
break;
|
|
default:
|
|
/*
|
|
* If the RB_ID_WLAN_DATA payload doesn't start with a
|
|
* magic number, the payload itself is the raw RLE-encoded
|
|
* calibration data.
|
|
*/
|
|
ret = routerboot_rle_decode(lbuf, tlen, outbuf, outlen);
|
|
if (ret)
|
|
pr_debug(RB_HC_PR_PFX "RLE decoding error (%d)\n", ret);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static ssize_t hc_attr_show(struct kobject *kobj, struct kobj_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct hc_attr *hc_attr;
|
|
const u8 *pld;
|
|
u16 pld_len;
|
|
|
|
hc_attr = container_of(attr, typeof(*hc_attr), kattr);
|
|
|
|
if (!hc_attr->pld_len)
|
|
return -ENOENT;
|
|
|
|
pld = hc_buf + hc_attr->pld_ofs;
|
|
pld_len = hc_attr->pld_len;
|
|
|
|
return hc_attr->tshow(pld, pld_len, buf);
|
|
}
|
|
|
|
/*
|
|
* This function will allocate and free memory every time it is called. This
|
|
* is not the fastest way to do this, but since the data is rarely read (mainly
|
|
* at boot time to load wlan caldata), this makes it possible to save memory for
|
|
* the system.
|
|
*/
|
|
static ssize_t hc_wlan_data_bin_read(struct file *filp, struct kobject *kobj,
|
|
struct bin_attribute *attr, char *buf,
|
|
loff_t off, size_t count)
|
|
{
|
|
struct hc_wlan_attr *hc_wattr;
|
|
size_t outlen;
|
|
void *outbuf;
|
|
int ret;
|
|
|
|
hc_wattr = container_of(attr, typeof(*hc_wattr), battr);
|
|
|
|
if (!hc_wattr->pld_len)
|
|
return -ENOENT;
|
|
|
|
outlen = RB_ART_SIZE;
|
|
|
|
/* Don't bother unpacking if the source is already too large */
|
|
if (hc_wattr->pld_len > outlen)
|
|
return -EFBIG;
|
|
|
|
outbuf = kmalloc(outlen, GFP_KERNEL);
|
|
if (!outbuf)
|
|
return -ENOMEM;
|
|
|
|
ret = hc_wlan_data_unpack(hc_wattr->pld_ofs, hc_wattr->pld_len, outbuf, &outlen);
|
|
if (ret) {
|
|
kfree(outbuf);
|
|
return ret;
|
|
}
|
|
|
|
if (off >= outlen) {
|
|
kfree(outbuf);
|
|
return 0;
|
|
}
|
|
|
|
if (off + count > outlen)
|
|
count = outlen - off;
|
|
|
|
memcpy(buf, outbuf + off, count);
|
|
|
|
kfree(outbuf);
|
|
return count;
|
|
}
|
|
|
|
int __init rb_hardconfig_init(struct kobject *rb_kobj)
|
|
{
|
|
struct mtd_info *mtd;
|
|
size_t bytes_read, buflen;
|
|
const u8 *buf;
|
|
int i, ret;
|
|
u32 magic;
|
|
|
|
// TODO allow override
|
|
mtd = get_mtd_device_nm(RB_MTD_HARD_CONFIG);
|
|
if (IS_ERR(mtd))
|
|
return -ENODEV;
|
|
|
|
hc_buflen = mtd->size;
|
|
hc_buf = kmalloc(hc_buflen, GFP_KERNEL);
|
|
if (!hc_buf)
|
|
return -ENOMEM;
|
|
|
|
ret = mtd_read(mtd, 0, hc_buflen, &bytes_read, hc_buf);
|
|
|
|
if (bytes_read != hc_buflen) {
|
|
ret = -EIO;
|
|
goto fail;
|
|
}
|
|
|
|
/* Check we have what we expect */
|
|
magic = *(const u32 *)hc_buf;
|
|
if (RB_MAGIC_HARD != magic) {
|
|
ret = -EINVAL;
|
|
goto fail;
|
|
}
|
|
|
|
/* Skip magic */
|
|
buf = hc_buf + sizeof(magic);
|
|
buflen = hc_buflen - sizeof(magic);
|
|
|
|
/* Populate sysfs */
|
|
ret = -ENOMEM;
|
|
hc_kobj = kobject_create_and_add(RB_MTD_HARD_CONFIG, rb_kobj);
|
|
if (!hc_kobj)
|
|
goto fail;
|
|
|
|
/* Locate and publish all known tags */
|
|
for (i = 0; i < ARRAY_SIZE(hc_attrs); i++) {
|
|
ret = routerboot_tag_find(buf, buflen, hc_attrs[i].tag_id,
|
|
&hc_attrs[i].pld_ofs, &hc_attrs[i].pld_len);
|
|
if (ret) {
|
|
hc_attrs[i].pld_ofs = hc_attrs[i].pld_len = 0;
|
|
continue;
|
|
}
|
|
|
|
/* Account for skipped magic */
|
|
hc_attrs[i].pld_ofs += sizeof(magic);
|
|
|
|
/* Special case RB_ID_WLAN_DATA to prep and create the binary attribute */
|
|
if ((RB_ID_WLAN_DATA == hc_attrs[i].tag_id) && hc_attrs[i].pld_len) {
|
|
hc_wlandata_battr.pld_ofs = hc_attrs[i].pld_ofs;
|
|
hc_wlandata_battr.pld_len = hc_attrs[i].pld_len;
|
|
|
|
ret = sysfs_create_bin_file(hc_kobj, &hc_wlandata_battr.battr);
|
|
if (ret)
|
|
pr_err(RB_HC_PR_PFX "Could not create %s sysfs entry (%d)\n",
|
|
hc_wlandata_battr.battr.attr.name, ret);
|
|
}
|
|
/* All other tags are published via standard attributes */
|
|
else {
|
|
ret = sysfs_create_file(hc_kobj, &hc_attrs[i].kattr.attr);
|
|
if (ret)
|
|
pr_err(RB_HC_PR_PFX "Could not create %s sysfs entry (%d)\n",
|
|
hc_attrs[i].kattr.attr.name, ret);
|
|
}
|
|
}
|
|
|
|
pr_info("MikroTik RouterBOARD hardware configuration sysfs driver v" RB_HARDCONFIG_VER "\n");
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
kfree(hc_buf);
|
|
return ret;
|
|
}
|
|
|
|
void __exit rb_hardconfig_exit(void)
|
|
{
|
|
kobject_put(hc_kobj);
|
|
kfree(hc_buf);
|
|
}
|