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Diffstat (limited to 'meta-quanta/meta-gsj/recipes-phosphor/quanta-nvme-powerctrl/README.md')
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diff --git a/meta-quanta/meta-gsj/recipes-phosphor/quanta-nvme-powerctrl/README.md b/meta-quanta/meta-gsj/recipes-phosphor/quanta-nvme-powerctrl/README.md deleted file mode 100644 index 51a9e8fe5..000000000 --- a/meta-quanta/meta-gsj/recipes-phosphor/quanta-nvme-powerctrl/README.md +++ /dev/null @@ -1,50 +0,0 @@ -### NVME SSD Power Control Manager - -#### Description - The Package is Mantain for SSD power control and related noification handle Deamon - -#### Design - nvme_gpio.service for initinal related GPIOs ( PRESENT, PWR, PWRGD, RST_U2 ) and according PRESENT signal fix HW PWR default output signal. - - nvme_powermanager.service loop for monitor PRESENT signal and update PWR output. - -#### Process - - * Plugging - 1. U2_[SSD_index]PRSNT_N will be input low - 2. Set PWR_U2_[SSD_index]_EN to high - 3. Check PWRGD_U2_[SSD_index] is high - 4-1. If PWRGD_U2_[SSD_index] is high (PWR Good) - - Wait 5ms - - Enable PCI Clock by SMBus 9FGL0851 - - Wait 100ms - - Reset RST_BMC_U2 [low->high] - - Send Assert to tell package could read SSD status. - - 4-2. If PWRGD_U2_[SSD_index] is low (PWR Fail) - - Disable Clock by SMBus - - Wait 100ms - - Set RST_BMC_U2_[SSD_index]_R_N to low - - Set LED_U2_FAULT to high - - * Removing - 1. U2_[SSD_index]PRSNT_N will be input high - 2. Disable Clock by SMBus 9FGL0851 - 3. PWR_U2_[SSD_index]_EN to low - 4. Check PWRGD_U2_[SSD_index] is low - 5. Send Assert to tell package update SSD status. - - -#### TODO - - 1. After power on ssd, bmc send command to 9FGL0851 (on SMBus8 0x68) for enable PCI clock, and send RST_BMC_U2 pin rsing event (set low, wait 500ms, set high). The Host could rescan PCI and detect SSD device. - -#### Test - - 1. PRESENT detect SSD: The Default Hardware is implement. - 2. Initial SSD slot Power output: nvme_gpio service has test on Module. It could sucess initial gpios and setting correct power output. - 3. Detect PRESENT and change power setting: nvme_powermanager service has tested on Module. It could success detect SSD plugged or removal change PWR output. - 4. NVME-MI connect: Ensure SSD power is ready then it will notify quanta NVME-MI package could read SSD information. - 5. FAULT LED handle: When detect power output irregular by PWRGD pin, the service will trigger related FAULT LED. - - |