diff options
Diffstat (limited to 'target/linux/gemini/patches-6.1/0021-usb-fotg210-udc-Implement-VBUS-session.patch')
| -rw-r--r-- | target/linux/gemini/patches-6.1/0021-usb-fotg210-udc-Implement-VBUS-session.patch | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/target/linux/gemini/patches-6.1/0021-usb-fotg210-udc-Implement-VBUS-session.patch b/target/linux/gemini/patches-6.1/0021-usb-fotg210-udc-Implement-VBUS-session.patch new file mode 100644 index 0000000000..d98561f0d4 --- /dev/null +++ b/target/linux/gemini/patches-6.1/0021-usb-fotg210-udc-Implement-VBUS-session.patch @@ -0,0 +1,96 @@ +From 2fbbfb2c556944945639b17b13fcb1e05272b646 Mon Sep 17 00:00:00 2001 +From: Linus Walleij <linus.walleij@linaro.org> +Date: Wed, 18 Jan 2023 08:09:21 +0100 +Subject: [PATCH 21/29] usb: fotg210-udc: Implement VBUS session + +Implement VBUS session handling for FOTG210. This is +mainly used by the UDC driver which needs to call down to +the FOTG210 core and enable/disable VBUS, as this needs to be +handled outside of the HCD and UDC drivers, by platform +specific glue code. + +The Gemini has a special bit in a system register to turn +VBUS on and off so we implement this in the FOTG210 core. + +Signed-off-by: Linus Walleij <linus.walleij@linaro.org> +Link: https://lore.kernel.org/r/20230103-gemini-fotg210-usb-v2-7-100388af9810@linaro.org +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- +--- a/drivers/usb/fotg210/fotg210-core.c ++++ b/drivers/usb/fotg210/fotg210-core.c +@@ -95,6 +95,35 @@ static int fotg210_gemini_init(struct fo + return 0; + } + ++/** ++ * fotg210_vbus() - Called by gadget driver to enable/disable VBUS ++ * @enable: true to enable VBUS, false to disable VBUS ++ */ ++void fotg210_vbus(struct fotg210 *fotg, bool enable) ++{ ++ u32 mask; ++ u32 val; ++ int ret; ++ ++ switch (fotg->port) { ++ case GEMINI_PORT_0: ++ mask = GEMINI_MISC_USB0_VBUS_ON; ++ val = enable ? GEMINI_MISC_USB0_VBUS_ON : 0; ++ break; ++ case GEMINI_PORT_1: ++ mask = GEMINI_MISC_USB1_VBUS_ON; ++ val = enable ? GEMINI_MISC_USB1_VBUS_ON : 0; ++ break; ++ default: ++ return; ++ } ++ ret = regmap_update_bits(fotg->map, GEMINI_GLOBAL_MISC_CTRL, mask, val); ++ if (ret) ++ dev_err(fotg->dev, "failed to %s VBUS\n", ++ enable ? "enable" : "disable"); ++ dev_info(fotg->dev, "%s: %s VBUS\n", __func__, enable ? "enable" : "disable"); ++} ++ + static int fotg210_probe(struct platform_device *pdev) + { + struct device *dev = &pdev->dev; +--- a/drivers/usb/fotg210/fotg210-udc.c ++++ b/drivers/usb/fotg210/fotg210-udc.c +@@ -1095,9 +1095,26 @@ static int fotg210_udc_stop(struct usb_g + return 0; + } + ++/** ++ * fotg210_vbus_session - Called by external transceiver to enable/disable udc ++ * @_gadget: usb gadget ++ * @is_active: 0 if should disable UDC VBUS, 1 if should enable ++ * ++ * Returns 0 ++ */ ++static int fotg210_vbus_session(struct usb_gadget *g, int is_active) ++{ ++ struct fotg210_udc *fotg210 = gadget_to_fotg210(g); ++ ++ /* Call down to core integration layer to drive or disable VBUS */ ++ fotg210_vbus(fotg210->fotg, is_active); ++ return 0; ++} ++ + static const struct usb_gadget_ops fotg210_gadget_ops = { + .udc_start = fotg210_udc_start, + .udc_stop = fotg210_udc_stop, ++ .vbus_session = fotg210_vbus_session, + }; + + /** +--- a/drivers/usb/fotg210/fotg210.h ++++ b/drivers/usb/fotg210/fotg210.h +@@ -17,6 +17,8 @@ struct fotg210 { + enum gemini_port port; + }; + ++void fotg210_vbus(struct fotg210 *fotg, bool enable); ++ + #ifdef CONFIG_USB_FOTG210_HCD + int fotg210_hcd_probe(struct platform_device *pdev, struct fotg210 *fotg); + int fotg210_hcd_remove(struct platform_device *pdev); |