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path: root/chip/npcx/hwtimer_chip.h
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* npcx: hwtimer: Fix 'slow' timer count just before overflowShawn Nematbakhsh2016-11-091-0/+5
| | | | | | | | | | | | | | | | | | | | If our 32-bit usec timer is close to overflow, we may deep sleep several times in succession without making any adjustment to our count, causing deadlines on the other side (eg. HOOK_TICK expiration) to be reached much slower than expected. Avoid this by not entering deep sleep if our timer is about to overflow. This will result in a <= HOOK_TICK_INTERVAL (200ms interval) period of not entering deep sleep, every ~4300 seconds. BUG=chrome-os-partner:59240 BRANCH=gru TEST=Verify 3x kevin units survive 16 hours in S3 without EC watchdog. Change-Id: I2126458be8820f78212e19c2bb79242ff1194f6f Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/409673 Commit-Ready: Shawn N <shawnn@chromium.org> Tested-by: Shawn N <shawnn@chromium.org> Reviewed-by: Shawn N <shawnn@chromium.org>
* nuc: Add support for CONFIG_LOW_POWER_S0.Mulin Chao2016-02-061-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To get better power consumption in S0, we add FW support for CONFIG_LOW_POWER_S0. Before entering deep idle in S0, we must enable Host interrupt to wake up EC if it needs to service LPC bus. This version also add a new bit of sleep_mask (SLEEP_MASK_FAN) in system.h to prevent EC enter deep idle if fan's duty isn't zero. Normally, the freq of PWM fan is 25 kHz. It means we must select apb2 clock as the source clock of PWM fan. Or fan would stop when ec enters deep idle because of no PWM signal. In hwtimer.c, we reset the preload counter to maximum value in ITEI32's ISR since preload counter is changed by __hw_clock_source_set all the time. We also found there're no event set if it's deadline is over 32 bits but current source clock isn't. To prevent ec doesn't wake-up in deep-idle even if ITIM32 expires, FW set an event for ITIM32 after process_timers(). Modified sources: 1. wheatley/board.h: Add CONFIG_LOW_POWER_S0 definition. 2. clock.c: Enable Host interrupt for LPC. 3. clock.c: Disable LP_WK_CTL for better power consumption. 4. gpio.c: Add ISR for Host interrupt. 5. uart.c: Introduce bit 6 of USTAT to make sure transmitting is completed. 6. register.h: Add uart_clear_pending_wakeup function. 7. hwtimer.c: Fixed watchdog issue when ITIM32 is closed to overflow. 8. fan.c: Enable deep sleep if duty cycle is zero. 9. include/system.h: Add SLEEP_MASK_FAN for fan control loop. 10. core/cortex-m/task.c: Add "isb" to flash the garbage data in the instruction pipeline. BUG=chrome-os-partner:34346 TEST=make buildall -j; test nuvoton IC specific drivers BRANCH=none Change-Id: Ibe3630d0d68cf3f32206adb2afa1b5958916a2be Signed-off-by: Mulin Chao <mlchao@nuvoton.com> Reviewed-on: https://chromium-review.googlesource.com/324651 Reviewed-by: Shawn N <shawnn@chromium.org>
* nuc: Get more accurate value of deep idle time.Mulin Chao2016-01-051-2/+5
| | | | | | | | | | | | | | | | | | | | | We should consider the interval between the calling __hw_clock_event_set and entering deep idle. In order to get more accurate value of deep idle time, FW should record the time-stamp before entering deep idle and calculate the deep idle time based on it. Modified drivers: 1. hwtimer_chip.h: Add new function declarations for deep idle time caculation. 2. hwtimer.c: Add new functionsfor deep idle time caculation. 3. clock.c: Modified for calculating more accurate deep idle time. BUG=chrome-os-partner:34346 TEST=make buildall -j; test nuvoton IC specific drivers BRANCH=none Change-Id: Id037c4dc3564659e4ad493f2fc3ffc5d06c18b06 Signed-off-by: Mulin Chao <mlchao@nuvoton.com> Reviewed-on: https://chromium-review.googlesource.com/320071 Reviewed-by: Randall Spangler <rspangler@chromium.org>
* nuc: Add SHI driver for arm-based platform in chip folder.Ian Chao2015-06-261-7/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add npcx_evb_arm board-level driver for arm-based platform. Add header.c: for booting from NPCX5M5G A3 Booter. Remove lfw folder due to those functionalitie have been replaced with Booter Modified drivers for Patch Set 1: 1. flash.c: Implement UMA lock, tri-state and selection register lock functionalities 2. hwtimer.c: Add ITIM32 for hwtimer 3. lpc.c: Add checking for LRESET 4. system.c: Modified CODERAM_ARCH functions for NPCX5M5G A3 Booter. 5. uart.c: Add support for module 2 Patch Set 2: 6. lpc.c: Modified lpc_get_pltrst_asserted() func Patch Set 3: 7. minimize the changes for CONFIG_CODERAM_ARCH in common layer 8. comments of Patch Set1/2 Patch Set 4: 9. Modified CONFIG_RO_MEM_OFF point to ro image and keep header as a part of ec.RO.flat. 10. Fixed RO_FRID and RW_FRID issues which caused by CONFIG_CODERAM_ARCH. Patch Set 5: 11. Modified system.c in common folder for supporting *_STORAGE_OFF. 12. Use *_STORAGE_OFF in firmware_image.lds.S to indicate flat file layout in flash. Patch Set 6: 13. rebase to newest version 14. system.c: Modified for the newest include/system.h Patch Set 7: 15. Merge from version 0625 BUG=chrome-os-partner:34346 TEST=make buildall -j; test nuvoton IC specific drivers BRANCH=none Change-Id: Ifd7c10b81b5781ccd75bb2558dc236486976e8ed Signed-off-by: Ian Chao <mlchao@nuvoton.com> Reviewed-on: https://chromium-review.googlesource.com/272034 Reviewed-by: Shawn N <shawnn@chromium.org> Tested-by: Shawn N <shawnn@chromium.org> Commit-Queue: Shawn N <shawnn@chromium.org>
* cleanup: fix all the header guardsBill Richardson2015-06-181-3/+3
| | | | | | | | | | | | | | | This unifies all the EC header files to use __CROS_EC_FILENAME_H as the include guard. Well, except for test/ util/ and extra/ which use __TEST_ __UTIL_ and __EXTRA_ prefixes respectively. BUG=chromium:496895 BRANCH=none TEST=make buildall -j Signed-off-by: Bill Richardson <wfrichar@chromium.org> Change-Id: Iea71b3a08bdec94a11239de810a2b2e152b15029 Reviewed-on: https://chromium-review.googlesource.com/278121 Reviewed-by: Randall Spangler <rspangler@chromium.org>
* nuc: Add all IC specific drivers of NPCX5M5GIan Chao2015-01-141-0/+28
Add npcx_evb in board folder for testing Add shared-spi arch support in common layer. Modified drivers for 1. Fan.c: console command “pwmduty”. 2. Pwm.c: for the issue when set duty to 0. 3. System.c: for hw reset only during system reset. 4. Flash.c: Fixed access denied bug of the flash driver for host command. 5. Comments from Patch Set 1 6. Comments from Patch Set 3 (except sha256.c) 7. Add openocd and flash_ec support for npcx_evb 8. Add little FW and spi-flash upload FW in chip folder 9. Add optional make rules for PROJECT_EXTRA 10.Replace CONFIG_SHRSPI_ARCH with CONFIG_CODERAM_ARCH and remove changes in common layer sources for shared-spi arch. (except sysjump) 11.Find the root cause of JTAG issue and use workaround method with SUPPORT_JTAG in clock.c 12 Execute hibernate in low power RAM for better power consumption 13 Add workaround method for version console command 14 Modified coding style issues by checkpatch.pl tool BUG=chrome-os-partner:34346 TEST=make buildall -j; test nuvoton IC specific drivers BRANCH=none Change-Id: I5e383420642de1643e2bead837a55c8c58481786 Signed-off-by: Ian Chao <mlchao@nuvoton.com> Signed-off-by: Randall Spangler <rspangler@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/233742
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