Commit 3bd442e4 authored by Xu Yang's avatar Xu Yang Committed by Greg Kroah-Hartman
Browse files

usb: chipidea: imx: add one fsl picophy parameter tuning implementation 



In some cases, the user may need to tune the rise/fall time of the
high-speed transmitter waveform for USB Certification. This will add
a parameter for this purpose. The value will be fetched from dtb and
finally written to the register.

Signed-off-by: default avatarXu Yang <xu.yang_2@nxp.com>
Acked-by: default avatarPeter Chen <peter.chen@kernel.org>
Link: https://lore.kernel.org/r/20230627112126.1882666-3-xu.yang_2@nxp.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 8d2c452c

drivers/usb/chipidea/ci_hdrc_imx.c

+3 −0
Original line number Original line Diff line number Diff line
@@ -182,6 +182,9 @@ static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev) 
	if (of_property_read_u32(np, "samsung,picophy-dc-vol-level-adjust",

	if (of_property_read_u32(np, "samsung,picophy-dc-vol-level-adjust",

			&data->dc_vol_level_adjust))

			&data->dc_vol_level_adjust))

		data->dc_vol_level_adjust = -1;

		data->dc_vol_level_adjust = -1;

	if (of_property_read_u32(np, "fsl,picophy-rise-fall-time-adjust",

			&data->rise_fall_time_adjust))

		data->rise_fall_time_adjust = -1;





	return data;

	return data;

}

}

drivers/usb/chipidea/ci_hdrc_imx.h

+1 −0
Original line number Original line Diff line number Diff line
@@ -28,6 +28,7 @@ struct imx_usbmisc_data { 
	enum usb_dr_mode available_role; /* runtime usb dr mode */

	enum usb_dr_mode available_role; /* runtime usb dr mode */

	int emp_curr_control;

	int emp_curr_control;

	int dc_vol_level_adjust;

	int dc_vol_level_adjust;

	int rise_fall_time_adjust;

};

};





int imx_usbmisc_init(struct imx_usbmisc_data *data);

int imx_usbmisc_init(struct imx_usbmisc_data *data);

drivers/usb/chipidea/usbmisc_imx.c

+9 −0
Original line number Original line Diff line number Diff line
@@ -131,6 +131,8 @@ 
#define MX7D_USB_OTG_PHY_CFG1		0x30

#define MX7D_USB_OTG_PHY_CFG1		0x30

#define TXPREEMPAMPTUNE0_BIT		28

#define TXPREEMPAMPTUNE0_BIT		28

#define TXPREEMPAMPTUNE0_MASK		(3 << 28)

#define TXPREEMPAMPTUNE0_MASK		(3 << 28)

#define TXRISETUNE0_BIT			24

#define TXRISETUNE0_MASK		(3 << 24)

#define TXVREFTUNE0_BIT			20

#define TXVREFTUNE0_BIT			20

#define TXVREFTUNE0_MASK		(0xf << 20)

#define TXVREFTUNE0_MASK		(0xf << 20)
@@ -674,6 +676,13 @@ static int usbmisc_imx7d_init(struct imx_usbmisc_data *data) 
			reg |= (data->dc_vol_level_adjust << TXVREFTUNE0_BIT);

			reg |= (data->dc_vol_level_adjust << TXVREFTUNE0_BIT);

		}

		}





		if (data->rise_fall_time_adjust >= 0 &&

			data->rise_fall_time_adjust <=

			(TXRISETUNE0_MASK >> TXRISETUNE0_BIT)) {

			reg &= ~TXRISETUNE0_MASK;

			reg |= (data->rise_fall_time_adjust << TXRISETUNE0_BIT);

		}



		writel(reg, usbmisc->base + MX7D_USB_OTG_PHY_CFG1);

		writel(reg, usbmisc->base + MX7D_USB_OTG_PHY_CFG1);

	}

	}