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usb: dwc2: Add eUSB2 PHY disconnect flow support

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To support eUSB2 PHY disconnect flow required in Soft disconnect
state set GOTGCTL_EUSB2_DISC_SUPP bit, if applicable.

On Session End Detected interrupt clear PCGCTL_GATEHCLK and
PCGCTL_STOPPCLK bits if eusb2_disc parameter true.

Signed-off-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Link: https://lore.kernel.org/r/9d50b83df693cda8c391313e90048df8dd611c04.1708948356.git.Minas.Harutyunyan@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Minas Harutyunyan 2024-03-13 09:19:42 +00:00 committed by Greg Kroah-Hartman
parent bc5d81b801
commit 7fd22e5bca
2 changed files with 22 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
drivers/usb/dwc2/core_intr.c
View File

@ -84,6 +84,7 @@ static void dwc2_handle_otg_intr(struct dwc2_hsotg *hsotg)
u32 gotgint;
u32 gotgctl;
u32 gintmsk;
u32 pcgctl;
gotgint = dwc2_readl(hsotg, GOTGINT);
gotgctl = dwc2_readl(hsotg, GOTGCTL);
@ -96,8 +97,22 @@ static void dwc2_handle_otg_intr(struct dwc2_hsotg *hsotg)
dwc2_op_state_str(hsotg));
gotgctl = dwc2_readl(hsotg, GOTGCTL);
if (dwc2_is_device_mode(hsotg))
if (dwc2_is_device_mode(hsotg)) {
if (hsotg->params.eusb2_disc) {
/* Clear the Gate hclk. */
pcgctl = dwc2_readl(hsotg, PCGCTL);
pcgctl &= ~PCGCTL_GATEHCLK;
dwc2_writel(hsotg, pcgctl, PCGCTL);
udelay(5);
/* Clear Phy Clock bit. */
pcgctl = dwc2_readl(hsotg, PCGCTL);
pcgctl &= ~PCGCTL_STOPPCLK;
dwc2_writel(hsotg, pcgctl, PCGCTL);
udelay(5);
}
dwc2_hsotg_disconnect(hsotg);
}
if (hsotg->op_state == OTG_STATE_B_HOST) {
hsotg->op_state = OTG_STATE_B_PERIPHERAL;
@ -117,7 +132,7 @@ static void dwc2_handle_otg_intr(struct dwc2_hsotg *hsotg)
* disconnected
*/
/* Reset to a clean state */
hsotg->lx_state = DWC2_L0;
hsotg->lx_state = DWC2_L3;
}
gotgctl = dwc2_readl(hsotg, GOTGCTL);
@ -286,7 +301,7 @@ static void dwc2_handle_session_req_intr(struct dwc2_hsotg *hsotg)
hsotg->lx_state);
if (dwc2_is_device_mode(hsotg)) {
if (hsotg->lx_state == DWC2_L2) {
if (hsotg->lx_state != DWC2_L0) {
if (hsotg->in_ppd) {
ret = dwc2_exit_partial_power_down(hsotg, 0,
true);

5
drivers/usb/dwc2/gadget.c
View File

@ -3420,8 +3420,11 @@ void dwc2_hsotg_core_init_disconnected(struct dwc2_hsotg *hsotg,
dwc2_hsotg_init_fifo(hsotg);
if (!is_usb_reset)
if (!is_usb_reset) {
dwc2_set_bit(hsotg, DCTL, DCTL_SFTDISCON);
if (hsotg->params.eusb2_disc)
dwc2_set_bit(hsotg, GOTGCTL, GOTGCTL_EUSB2_DISC_SUPP);
}
dcfg |= DCFG_EPMISCNT(1);