Commit bc5d81b8 authored by Minas Harutyunyan's avatar Minas Harutyunyan Committed by Greg Kroah-Hartman
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usb: dwc2: Add new parameter eusb2_disc 



Added new parameter eusb2_disc to list of core parameters which specify
whether eUSB2 PHY disconnect support flow applicable or no.
Set to false as default value and checked core version if set to true.
This parameter applicable in device mode of HSOTG and HS IOT cores
v5.00 or higher.

Added print this parameter in show parameters of debugfs.

Signed-off-by: default avatarMinas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Link: https://lore.kernel.org/r/e77cc4312bda797d1ddaa4351d86c65a69c8b926.1708948356.git.Minas.Harutyunyan@synopsys.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent f73220f7

drivers/usb/dwc2/core.h

+6 −0
Original line number Diff line number Diff line
@@ -288,6 +288,11 @@ enum dwc2_ep0_state { 
 *                      core has been configured to work at either data path

 *                      width.

 *                       8 or 16 (default 16 if available)

 * @eusb2_disc:         Specifies whether eUSB2 PHY disconnect support flow

 *                      applicable or no. Applicable in device mode of HSOTG

 *                      and HS IOT cores v5.00 or higher.

 *                       0 - eUSB2 PHY disconnect support flow not applicable

 *                       1 - eUSB2 PHY disconnect support flow applicable

 * @phy_ulpi_ddr:       Specifies whether the ULPI operates at double or single

 *                      data rate. This parameter is only applicable if phy_type

 *                      is ULPI.
@@ -442,6 +447,7 @@ struct dwc2_core_params { 
#define DWC2_SPEED_PARAM_LOW	2



	u8 phy_utmi_width;

	bool eusb2_disc;

	bool phy_ulpi_ddr;

	bool phy_ulpi_ext_vbus;

	bool enable_dynamic_fifo;

drivers/usb/dwc2/debugfs.c

+1 −0
Original line number Diff line number Diff line
@@ -686,6 +686,7 @@ static int params_show(struct seq_file *seq, void *v) 
	print_param(seq, p, host_channels);

	print_param(seq, p, phy_type);

	print_param(seq, p, phy_utmi_width);

	print_param(seq, p, eusb2_disc);

	print_param(seq, p, phy_ulpi_ddr);

	print_param(seq, p, phy_ulpi_ext_vbus);

	print_param(seq, p, i2c_enable);

drivers/usb/dwc2/params.c

+22 −0
Original line number Diff line number Diff line
@@ -475,6 +475,7 @@ static void dwc2_set_default_params(struct dwc2_hsotg *hsotg) 
	dwc2_set_param_lpm(hsotg);

	p->phy_ulpi_ddr = false;

	p->phy_ulpi_ext_vbus = false;

	p->eusb2_disc = false;



	p->enable_dynamic_fifo = hw->enable_dynamic_fifo;

	p->en_multiple_tx_fifo = hw->en_multiple_tx_fifo;
@@ -737,6 +738,25 @@ static void dwc2_check_param_tx_fifo_sizes(struct dwc2_hsotg *hsotg) 
	}

}



static void dwc2_check_param_eusb2_disc(struct dwc2_hsotg *hsotg)

{

	u32 gsnpsid;



	if (!hsotg->params.eusb2_disc)

		return;

	gsnpsid = dwc2_readl(hsotg, GSNPSID);

	/*

	 * eusb2_disc not supported by FS IOT devices.

	 * For other cores, it supported starting from version 5.00a

	 */

	if ((gsnpsid & ~DWC2_CORE_REV_MASK) == DWC2_FS_IOT_ID ||

	    (gsnpsid & DWC2_CORE_REV_MASK) <

	    (DWC2_CORE_REV_5_00a & DWC2_CORE_REV_MASK)) {

		hsotg->params.eusb2_disc = false;

		return;

	}

}



#define CHECK_RANGE(_param, _min, _max, _def) do {			\

		if ((int)(hsotg->params._param) < (_min) ||		\

		    (hsotg->params._param) > (_max)) {			\
@@ -765,6 +785,8 @@ static void dwc2_check_params(struct dwc2_hsotg *hsotg) 
	dwc2_check_param_speed(hsotg);

	dwc2_check_param_phy_utmi_width(hsotg);

	dwc2_check_param_power_down(hsotg);

	dwc2_check_param_eusb2_disc(hsotg);



	CHECK_BOOL(enable_dynamic_fifo, hw->enable_dynamic_fifo);

	CHECK_BOOL(en_multiple_tx_fifo, hw->en_multiple_tx_fifo);

	CHECK_BOOL(i2c_enable, hw->i2c_enable);