diff options
Diffstat (limited to 'payloads/libpayload')
| -rw-r--r-- | payloads/libpayload/Kconfig | 16 | ||||
| -rw-r--r-- | payloads/libpayload/drivers/Makefile.inc | 1 | ||||
| -rw-r--r-- | payloads/libpayload/drivers/timer/armada38x.c | 50 |
3 files changed, 67 insertions, 0 deletions
diff --git a/payloads/libpayload/Kconfig b/payloads/libpayload/Kconfig index 5e0262426b..95bd045a38 100644 --- a/payloads/libpayload/Kconfig +++ b/payloads/libpayload/Kconfig @@ -398,6 +398,12 @@ config TIMER_TEGRA_1US config TIMER_IPQ806X bool "Timer for ipq806x platforms" +config TIMER_ARMADA38X + bool "Timer for armada38x platforms" + help + This is the timer driver for marvell armada38x + platforms. + config TIMER_RK bool "Timer for Rockchip" @@ -450,6 +456,16 @@ config IPQ806X_TIMER_REG help Address of the register to read a free running timer value. +config ARMADA38X_TIMER_FREQ + int "Hardware timer frequency" + depends on TIMER_ARMADA38X + default 25000000 + +config ARMADA38X_TIMER_REG + hex "Timer register address" + default 0xF1020314 + depends on TIMER_ARMADA38X + config IPROC_PERIPH_GLB_TIM_REG_BASE hex "Cygnus timer base address" depends on TIMER_CYGNUS diff --git a/payloads/libpayload/drivers/Makefile.inc b/payloads/libpayload/drivers/Makefile.inc index be43b350c2..31eb43ce3b 100644 --- a/payloads/libpayload/drivers/Makefile.inc +++ b/payloads/libpayload/drivers/Makefile.inc @@ -54,6 +54,7 @@ libc-$(CONFIG_LP_TIMER_RK) += timer/rktimer.c libc-$(CONFIG_LP_TIMER_BG4CD) += timer/bg4cd.c libc-$(CONFIG_LP_TIMER_IMG_PISTACHIO) += timer/img_pistachio.c libc-$(CONFIG_LP_TIMER_CYGNUS) += timer/cygnus.c +libc-$(CONFIG_LP_TIMER_ARMADA38X) += timer/armada38x.c # Video console drivers libc-$(CONFIG_LP_VIDEO_CONSOLE) += video/video.c diff --git a/payloads/libpayload/drivers/timer/armada38x.c b/payloads/libpayload/drivers/timer/armada38x.c new file mode 100644 index 0000000000..2a060bb848 --- /dev/null +++ b/payloads/libpayload/drivers/timer/armada38x.c @@ -0,0 +1,50 @@ +/* + * Copyright 2015 Google Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <libpayload.h> +#include <libpayload-config.h> + +uint64_t timer_hz(void) +{ + return CONFIG_LP_ARMADA38X_TIMER_FREQ; +} + +uint64_t timer_raw_value(void) +{ + static uint64_t total_ticks = 0; + uint64_t overflow = 0; + uint32_t current_ticks = + 0xffffffff - readl((void *)CONFIG_LP_ARMADA38X_TIMER_REG); + + /* It assumes only one overflow happened since the last call */ + if (current_ticks <= (uint32_t)total_ticks) + overflow = 1ULL << 32; + /* The least significant part(32 bits) of total_ticks will always + * become equal to current ticks */ + total_ticks = (((total_ticks + overflow) >> 32) << 32) + current_ticks; + return total_ticks; +} |