2014-10-29 07:18:38 +08:00
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2003 Atheros Communications, Inc., All Rights Reserved.
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* Copyright (C) 2006 FON Technology, SL.
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* Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org>
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* Copyright (C) 2006-2009 Felix Fietkau <nbd@openwrt.org>
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*/
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <asm/irq_cpu.h>
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#include <asm/reboot.h>
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#include <asm/bootinfo.h>
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#include <asm/time.h>
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2014-10-29 07:18:44 +08:00
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#include <ath25_platform.h>
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2014-10-29 07:18:39 +08:00
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#include "devices.h"
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#include "ar5312.h"
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2014-10-29 07:18:40 +08:00
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#include "ar2315.h"
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2014-10-29 07:18:39 +08:00
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2014-10-29 07:18:41 +08:00
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void (*ath25_irq_dispatch)(void);
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2014-10-29 07:18:44 +08:00
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static inline bool check_radio_magic(const void __iomem *addr)
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{
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addr += 0x7a; /* offset for flash magic */
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return (__raw_readb(addr) == 0x5a) && (__raw_readb(addr + 1) == 0xa5);
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}
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static inline bool check_notempty(const void __iomem *addr)
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{
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return __raw_readl(addr) != 0xffffffff;
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}
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static inline bool check_board_data(const void __iomem *addr, bool broken)
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{
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/* config magic found */
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if (__raw_readl(addr) == ATH25_BD_MAGIC)
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return true;
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if (!broken)
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return false;
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/* broken board data detected, use radio data to find the
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* offset, user will fix this */
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if (check_radio_magic(addr + 0x1000))
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return true;
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if (check_radio_magic(addr + 0xf8))
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return true;
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return false;
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}
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static const void __iomem * __init find_board_config(const void __iomem *limit,
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const bool broken)
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{
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const void __iomem *addr;
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const void __iomem *begin = limit - 0x1000;
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const void __iomem *end = limit - 0x30000;
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for (addr = begin; addr >= end; addr -= 0x1000)
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if (check_board_data(addr, broken))
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return addr;
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return NULL;
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}
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static const void __iomem * __init find_radio_config(const void __iomem *limit,
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const void __iomem *bcfg)
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{
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const void __iomem *rcfg, *begin, *end;
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/*
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* Now find the start of Radio Configuration data, using heuristics:
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* Search forward from Board Configuration data by 0x1000 bytes
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* at a time until we find non-0xffffffff.
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*/
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begin = bcfg + 0x1000;
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end = limit;
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for (rcfg = begin; rcfg < end; rcfg += 0x1000)
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if (check_notempty(rcfg) && check_radio_magic(rcfg))
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return rcfg;
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/* AR2316 relocates radio config to new location */
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begin = bcfg + 0xf8;
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end = limit - 0x1000 + 0xf8;
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for (rcfg = begin; rcfg < end; rcfg += 0x1000)
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if (check_notempty(rcfg) && check_radio_magic(rcfg))
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return rcfg;
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return NULL;
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}
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/*
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* NB: Search region size could be larger than the actual flash size,
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* but this shouldn't be a problem here, because the flash
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* will simply be mapped multiple times.
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*/
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int __init ath25_find_config(phys_addr_t base, unsigned long size)
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{
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const void __iomem *flash_base, *flash_limit;
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struct ath25_boarddata *config;
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unsigned int rcfg_size;
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int broken_boarddata = 0;
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const void __iomem *bcfg, *rcfg;
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u8 *board_data;
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u8 *radio_data;
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u8 *mac_addr;
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u32 offset;
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flash_base = ioremap_nocache(base, size);
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flash_limit = flash_base + size;
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ath25_board.config = NULL;
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ath25_board.radio = NULL;
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/* Copy the board and radio data to RAM, because accessing the mapped
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* memory of the flash directly after booting is not safe */
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/* Try to find valid board and radio data */
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bcfg = find_board_config(flash_limit, false);
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/* If that fails, try to at least find valid radio data */
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if (!bcfg) {
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bcfg = find_board_config(flash_limit, true);
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broken_boarddata = 1;
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}
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if (!bcfg) {
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pr_warn("WARNING: No board configuration data found!\n");
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goto error;
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}
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board_data = kzalloc(BOARD_CONFIG_BUFSZ, GFP_KERNEL);
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ath25_board.config = (struct ath25_boarddata *)board_data;
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memcpy_fromio(board_data, bcfg, 0x100);
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if (broken_boarddata) {
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pr_warn("WARNING: broken board data detected\n");
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config = ath25_board.config;
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if (is_zero_ether_addr(config->enet0_mac)) {
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pr_info("Fixing up empty mac addresses\n");
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config->reset_config_gpio = 0xffff;
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config->sys_led_gpio = 0xffff;
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random_ether_addr(config->wlan0_mac);
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config->wlan0_mac[0] &= ~0x06;
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random_ether_addr(config->enet0_mac);
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random_ether_addr(config->enet1_mac);
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}
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}
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/* Radio config starts 0x100 bytes after board config, regardless
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* of what the physical layout on the flash chip looks like */
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rcfg = find_radio_config(flash_limit, bcfg);
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if (!rcfg) {
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pr_warn("WARNING: Could not find Radio Configuration data\n");
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goto error;
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}
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radio_data = board_data + 0x100 + ((rcfg - bcfg) & 0xfff);
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ath25_board.radio = radio_data;
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offset = radio_data - board_data;
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pr_info("Radio config found at offset 0x%x (0x%x)\n", rcfg - bcfg,
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offset);
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rcfg_size = BOARD_CONFIG_BUFSZ - offset;
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memcpy_fromio(radio_data, rcfg, rcfg_size);
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mac_addr = &radio_data[0x1d * 2];
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if (is_broadcast_ether_addr(mac_addr)) {
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pr_info("Radio MAC is blank; using board-data\n");
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ether_addr_copy(mac_addr, ath25_board.config->wlan0_mac);
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}
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iounmap(flash_base);
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return 0;
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error:
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iounmap(flash_base);
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return -ENODEV;
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}
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2014-10-29 07:18:38 +08:00
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static void ath25_halt(void)
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{
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local_irq_disable();
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unreachable();
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}
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void __init plat_mem_setup(void)
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{
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_machine_halt = ath25_halt;
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pm_power_off = ath25_halt;
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2014-10-29 07:18:39 +08:00
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if (is_ar5312())
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ar5312_plat_mem_setup();
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2014-10-29 07:18:40 +08:00
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else
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ar2315_plat_mem_setup();
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2014-10-29 07:18:39 +08:00
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2014-10-29 07:18:38 +08:00
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/* Disable data watchpoints */
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write_c0_watchlo0(0);
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}
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asmlinkage void plat_irq_dispatch(void)
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{
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2014-10-29 07:18:41 +08:00
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ath25_irq_dispatch();
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2014-10-29 07:18:38 +08:00
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}
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void __init plat_time_init(void)
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{
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2014-10-29 07:18:39 +08:00
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if (is_ar5312())
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ar5312_plat_time_init();
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2014-10-29 07:18:40 +08:00
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else
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ar2315_plat_time_init();
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2014-10-29 07:18:38 +08:00
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}
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2015-04-28 06:47:55 +08:00
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unsigned int get_c0_compare_int(void)
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2014-10-29 07:18:38 +08:00
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{
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return CP0_LEGACY_COMPARE_IRQ;
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}
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void __init arch_init_irq(void)
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{
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clear_c0_status(ST0_IM);
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mips_cpu_irq_init();
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2014-10-29 07:18:41 +08:00
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/* Initialize interrupt controllers */
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if (is_ar5312())
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ar5312_arch_init_irq();
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else
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ar2315_arch_init_irq();
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2014-10-29 07:18:38 +08:00
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}
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