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)
88 unsigned int boff, time, delta;
90 time = get_clock_counter();
91 if (fw.phy.state == CARL9170_PHY_ON) {
92 delta = (time - fw.tally_clock);
94 fw.tally.active += delta;
96 boff = get(AR9170_MAC_REG_BACKOFF_STATUS);
97 if (boff & AR9170_MAC_BACKOFF_TX_PE)
98 fw.tally.tx_time += delta;
99 if (boff & AR9170_MAC_BACKOFF_CCA)
100 fw.tally.cca += delta;
103 fw.tally_clock = time;
107 #ifdef CONFIG_CARL9170FW_RADAR
108 static void radar_pattern_generator(void)
110 if (fw.phy.state == CARL9170_PHY_ON) {
111 if (fw.wlan.soft_radar == NO_RADAR ||
112 fw.wlan.soft_radar >= __CARL9170FW_NUM_RADARS)
115 const struct radar_info *radar = &radars[fw.wlan.soft_radar];
116 if (radar->pulses >= fw.wlan.pattern_index) {
117 fw.wlan.pattern_index = 0;
120 if (radar->pulses > fw.wlan.pattern_index) {
121 const struct radar_info_pattern *pattern = &radar->pattern[fw.wlan.pattern_index];
122 if (is_after_usecs(fw.wlan.radar_last, pattern->pulse_interval)) {
123 fw.wlan.radar_last = get_clock_counter();
124 set(0x1C3BC0, pattern->pulse_pattern);
125 set(0x1C3BBC, pattern->pulse_mode);
126 udelay(pattern->pulse_width);
127 set(0x1C3BBC, ~pattern->pulse_mode);
128 fw.wlan.pattern_index++;
134 static void radar_pattern_generator(void)
137 #endif /* CONFIG_CARL9170FW_RADAR */
139 static void __noreturn main_loop(void)
146 * Due to frame order persevation, the wlan subroutines
147 * must be executed before handle_host_interface.
151 handle_host_interface();
159 radar_pattern_generator();
164 * The bootcode will work with the device driver to load the firmware
165 * onto the device's Program SRAM. The Program SRAM has a size of 16 KB
166 * and also contains the stack, which grows down from 0x204000.
168 * The Program SRAM starts at address 0x200000 on the device.
169 * The firmware entry point (0x200004) is located in boot.S.
170 * we put _start() there with the linker script carl9170.lds.
173 void __section(boot) __noreturn __visible start(void)
175 clock_set(AHB_40MHZ_OSC, true);
177 /* watchdog magic pattern check */
178 if ((get(AR9170_PWR_REG_WATCH_DOG_MAGIC) & 0xffff0000) == 0x12340000) {
179 /* watch dog warm start */
180 incl(AR9170_PWR_REG_WATCH_DOG_MAGIC);
182 } else if ((get(AR9170_PWR_REG_WATCH_DOG_MAGIC) & 0xffff0000) == 0x98760000) {
186 /* write the magic pattern for watch dog */
187 andl(AR9170_PWR_REG_WATCH_DOG_MAGIC, 0xFFFF);
188 orl(AR9170_PWR_REG_WATCH_DOG_MAGIC, 0x12340000);
192 #ifdef CONFIG_CARL9170FW_DEBUG
195 BUG_ON(0x2b || !0x2b);
196 INFO("INFO MESSAGE");
198 /* a set of unique characters to detect transfer data corruptions */
199 DBG("AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz"
200 " ~`!1@2#3$4%%5^6&7*8(9)0_-+={[}]|\\:;\"'<,>.?/");
201 #endif /* CONFIG_CARL9170FW_DEBUG */
204 * Tell the host, that the firmware has booted and is
205 * now ready to process requests.
207 send_cmd_to_host(0, CARL9170_RSP_BOOT, 0x00, NULL);