2 * carl9170 firmware - used by the ar9170 wireless device
4 * initialization and main() loop
6 * Copyright (c) 2000-2005 ZyDAS Technology Corporation
7 * Copyright (c) 2007-2009 Atheros Communications, Inc.
8 * Copyright 2009 Johannes Berg <johannes@sipsolutions.net>
9 * Copyright 2009-2011 Christian Lamparter <chunkeey@googlemail.com>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License along
22 * with this program; if not, write to the Free Software Foundation, Inc.,
23 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
36 #define AR9170_WATCH_DOG_TIMER 0x100
38 static void init(void)
42 #ifdef CONFIG_CARL9170FW_DEBUG_UART
44 #endif /* CONFIG_CARL9170FW_DEBUG_UART */
46 /* 25/50/100ms timer (depends on cpu clock) */
52 /* initialize DMA memory */
53 memset(&dma_mem, 0, sizeof(dma_mem));
56 dma_init_descriptors();
58 /* clear all interrupt */
59 set(AR9170_MAC_REG_INT_CTRL, 0xffff);
61 orl(AR9170_MAC_REG_AFTER_PNP, 1);
63 /* Init watch dog control flag */
64 fw.watchdog_enable = 1;
66 set(AR9170_TIMER_REG_WATCH_DOG, AR9170_WATCH_DOG_TIMER);
68 #ifdef CONFIG_CARL9170FW_GPIO_INTERRUPT
69 fw.cached_gpio_state.gpio = get(AR9170_GPIO_REG_PORT_DATA) &
71 #endif /* CONFIG_CARL9170FW_GPIO_INTERRUPT */
73 /* this will get the downqueue moving. */
77 static void handle_fw(void)
79 if (fw.watchdog_enable == 1)
80 set(AR9170_TIMER_REG_WATCH_DOG, AR9170_WATCH_DOG_TIMER);
86 static void tally_update(void)
90 time = get_clock_counter();
91 #ifdef CONFIG_CARL9170FW_RADIO_FUNCTIONS
92 if (fw.phy.state == CARL9170_PHY_ON) {
93 unsigned int boff, delta;
95 delta = (time - fw.tally_clock);
97 fw.tally.active += delta;
99 boff = get(AR9170_MAC_REG_BACKOFF_STATUS);
100 if (boff & AR9170_MAC_BACKOFF_TX_PE)
101 fw.tally.tx_time += delta;
102 if (boff & AR9170_MAC_BACKOFF_CCA)
103 fw.tally.cca += delta;
105 #endif /* CONFIG_CARL9170FW_RADIO_FUNCTIONS */
106 fw.tally_clock = time;
110 #ifdef CONFIG_CARL9170FW_RADAR
111 static void radar_pattern_generator(void)
113 if (fw.phy.state == CARL9170_PHY_ON) {
114 if (fw.wlan.soft_radar == NO_RADAR ||
115 fw.wlan.soft_radar >= __CARL9170FW_NUM_RADARS)
118 const struct radar_info *radar = &radars[fw.wlan.soft_radar];
119 if (radar->pulses >= fw.wlan.pattern_index) {
120 fw.wlan.pattern_index = 0;
123 if (radar->pulses > fw.wlan.pattern_index) {
124 const struct radar_info_pattern *pattern = &radar->pattern[fw.wlan.pattern_index];
125 if (is_after_usecs(fw.wlan.radar_last, pattern->pulse_interval)) {
126 fw.wlan.radar_last = get_clock_counter();
127 set(0x1C3BC0, pattern->pulse_pattern);
128 set(0x1C3BBC, pattern->pulse_mode);
129 udelay(pattern->pulse_width);
130 set(0x1C3BBC, ~pattern->pulse_mode);
131 fw.wlan.pattern_index++;
137 static void radar_pattern_generator(void)
140 #endif /* CONFIG_CARL9170FW_RADAR */
142 static void __noreturn main_loop(void)
149 * Due to frame order persevation, the wlan subroutines
150 * must be executed before handle_host_interface.
154 handle_host_interface();
162 radar_pattern_generator();
167 * The bootcode will work with the device driver to load the firmware
168 * onto the device's Program SRAM. The Program SRAM has a size of 16 KB
169 * and also contains the stack, which grows down from 0x204000.
171 * The Program SRAM starts at address 0x200000 on the device.
172 * The firmware entry point (0x200004) is located in boot.S.
173 * we put _start() there with the linker script carl9170.lds.
176 void __section(boot) __noreturn __visible start(void)
178 clock_set(AHB_40MHZ_OSC, true);
180 /* watchdog magic pattern check */
181 if ((get(AR9170_PWR_REG_WATCH_DOG_MAGIC) & 0xffff0000) == 0x12340000) {
182 /* watch dog warm start */
183 incl(AR9170_PWR_REG_WATCH_DOG_MAGIC);
185 } else if ((get(AR9170_PWR_REG_WATCH_DOG_MAGIC) & 0xffff0000) == 0x98760000) {
189 /* write the magic pattern for watch dog */
190 andl(AR9170_PWR_REG_WATCH_DOG_MAGIC, 0xFFFF);
191 orl(AR9170_PWR_REG_WATCH_DOG_MAGIC, 0x12340000);
195 #ifdef CONFIG_CARL9170FW_DEBUG
198 BUG_ON(0x2b || !0x2b);
199 INFO("INFO MESSAGE");
201 /* a set of unique characters to detect transfer data corruptions */
202 DBG("AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz"
203 " ~`!1@2#3$4%%5^6&7*8(9)0_-+={[}]|\\:;\"'<,>.?/");
204 #endif /* CONFIG_CARL9170FW_DEBUG */
207 * Tell the host, that the firmware has booted and is
208 * now ready to process requests.
210 send_cmd_to_host(0, CARL9170_RSP_BOOT, 0x00, NULL);