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drivers: udc_dwc2: Implement USBHS hibernation quirks

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Use the quirk to keep only the necessary clocks running when the core is
hibernated. The quirk is necessary to bring the USB suspend current
below the USB 2.0 suspend current limit.

Signed-off-by: Tomasz Moń <tomasz.mon@nordicsemi.no>
This commit is contained in:
Tomasz Moń 2024-09-19 09:39:14 +02:00 • committed by Anas Nashif
commit e2f2e448c7
1 changed files with 32 additions and 0 deletions
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32
drivers/usb/udc/udc_dwc2_vendor_quirks.h
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@ -249,6 +249,36 @@ static inline int usbhs_is_phy_clk_off(const struct device *dev)
return !k_event_test(&usbhs_events, USBHS_VBUS_READY);
}
static inline int usbhs_post_hibernation_entry(const struct device *dev)
{
const struct udc_dwc2_config *const config = dev->config;
struct usb_dwc2_reg *const base = config->base;
NRF_USBHS_Type *wrapper = USBHS_DT_WRAPPER_REG_ADDR(0);
sys_set_bits((mem_addr_t)&base->pcgcctl, USB_DWC2_PCGCCTL_GATEHCLK);
sys_write32(0x87, (mem_addr_t)wrapper + 0xC80);
sys_write32(0x87, (mem_addr_t)wrapper + 0xC84);
sys_write32(1, (mem_addr_t)wrapper + 0x004);
return 0;
}
static inline int usbhs_pre_hibernation_exit(const struct device *dev)
{
const struct udc_dwc2_config *const config = dev->config;
struct usb_dwc2_reg *const base = config->base;
NRF_USBHS_Type *wrapper = USBHS_DT_WRAPPER_REG_ADDR(0);
sys_clear_bits((mem_addr_t)&base->pcgcctl, USB_DWC2_PCGCCTL_GATEHCLK);
wrapper->TASKS_START = 1;
sys_write32(0, (mem_addr_t)wrapper + 0xC80);
sys_write32(0, (mem_addr_t)wrapper + 0xC84);
return 0;
}
#define QUIRK_NRF_USBHS_DEFINE(n) \
struct dwc2_vendor_quirks dwc2_vendor_quirks_##n = { \
.init = usbhs_enable_nrfs_service, \
@ -258,6 +288,8 @@ static inline int usbhs_is_phy_clk_off(const struct device *dev)
.irq_clear = usbhs_irq_clear, \
.caps = usbhs_init_caps, \
.is_phy_clk_off = usbhs_is_phy_clk_off, \
.post_hibernation_entry = usbhs_post_hibernation_entry, \
.pre_hibernation_exit = usbhs_pre_hibernation_exit, \
};
DT_INST_FOREACH_STATUS_OKAY(QUIRK_NRF_USBHS_DEFINE)