2 * carl9170 firmware - used by the ar9170 wireless device
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 2009-2012 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.
32 void timer_init(const unsigned int timer, const unsigned int interval)
34 /* Set timer to periodic mode */
35 orl(AR9170_TIMER_REG_CONTROL, BIT(timer));
37 /* Set time interval */
38 set(AR9170_TIMER_REG_TIMER0 + (timer << 2), interval - 1);
40 /* Clear timer interrupt flag */
41 orl(AR9170_TIMER_REG_INTERRUPT, BIT(timer));
44 void clock_set(const enum cpu_clock_t clock_, const bool on, const unsigned int div)
48 * This setting does more than just mess with the CPU Clock.
49 * So watch out, if you need _stable_ timer interrupts.
51 #ifdef CONFIG_CARL9170FW_RADIO_FUNCTIONS
52 if (fw.phy.frequency < 3000000)
53 set(AR9170_PWR_REG_PLL_ADDAC, 0x5163);
55 set(AR9170_PWR_REG_PLL_ADDAC, 0x5143);
57 set(AR9170_PWR_REG_PLL_ADDAC, 0x5163);
58 #endif /* CONFIG_CARL9170FW_RADIO_FUNCTIONS */
60 fw.ticks_per_usec = GET_VAL(AR9170_PWR_PLL_ADDAC_DIV,
61 get(AR9170_PWR_REG_PLL_ADDAC));
63 set(AR9170_PWR_REG_CLOCK_SEL, (uint32_t) ((on ? 0x70 : 0x600) | clock_ |
64 SET_CONSTVAL(AR9170_PWR_CLK_ADDAC_CLK160, div))));
68 fw.ticks_per_usec >>= 1;
71 fw.ticks_per_usec >>= 1;
77 static void timer0_isr(void)
81 #ifdef CONFIG_CARL9170FW_GPIO_INTERRUPT
83 #endif /* CONFIG_CARL9170FW_GPIO_INTERRUPT */
85 #ifdef CONFIG_CARL9170FW_DEBUG_LED_HEARTBEAT
86 set(AR9170_GPIO_REG_PORT_DATA, get(AR9170_GPIO_REG_PORT_DATA) ^ 1);
87 #endif /* CONFIG_CARL9170FW_DEBUG_LED_HEARTBEAT */
90 void handle_timer(void)
94 intr = get(AR9170_TIMER_REG_INTERRUPT);
96 /* ACK timer interrupt */
97 set(AR9170_TIMER_REG_INTERRUPT, intr);
99 #define HANDLER(intr, flag, func) \
101 if ((intr & flag) != 0) { \
107 HANDLER(intr, BIT(0), timer0_isr);
110 DBG("Unhandled Timer Event %x", (unsigned int) intr);