diff options
Diffstat (limited to 'target/linux/gemini/patches-6.1/0005-usb-fotg2-add-Gemini-specific-handling.patch')
| -rw-r--r-- | target/linux/gemini/patches-6.1/0005-usb-fotg2-add-Gemini-specific-handling.patch | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/target/linux/gemini/patches-6.1/0005-usb-fotg2-add-Gemini-specific-handling.patch b/target/linux/gemini/patches-6.1/0005-usb-fotg2-add-Gemini-specific-handling.patch new file mode 100644 index 0000000000..daf8d85611 --- /dev/null +++ b/target/linux/gemini/patches-6.1/0005-usb-fotg2-add-Gemini-specific-handling.patch @@ -0,0 +1,135 @@ +From f7f6c8aca91093e2f886ec97910b1a7d9a69bf9b Mon Sep 17 00:00:00 2001 +From: Linus Walleij <linus.walleij@linaro.org> +Date: Wed, 9 Nov 2022 21:05:54 +0100 +Subject: [PATCH 05/29] usb: fotg2: add Gemini-specific handling + +The Cortina Systems Gemini has bolted on a PHY inside the +silicon that can be handled by six bits in a MISC register in +the system controller. + +If we are running on Gemini, look up a syscon regmap through +a phandle and enable VBUS and optionally the Mini-B connector. + +If the device is flagged as "wakeup-source" using the standard +DT bindings, we also enable this in the global controller for +respective port. + +Signed-off-by: Linus Walleij <linus.walleij@linaro.org> +Link: https://lore.kernel.org/r/20221109200554.1957185-1-linus.walleij@linaro.org +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- +--- a/drivers/usb/fotg210/Kconfig ++++ b/drivers/usb/fotg210/Kconfig +@@ -5,6 +5,7 @@ config USB_FOTG210 + depends on USB || USB_GADGET + depends on HAS_DMA && HAS_IOMEM + default ARCH_GEMINI ++ select MFD_SYSCON + help + Faraday FOTG210 is a dual-mode USB controller that can act + in both host controller and peripheral controller mode. +--- a/drivers/usb/fotg210/fotg210-core.c ++++ b/drivers/usb/fotg210/fotg210-core.c +@@ -5,15 +5,86 @@ + * whether to proceed with probing the host or the peripheral + * driver. + */ ++#include <linux/bitops.h> + #include <linux/device.h> ++#include <linux/mfd/syscon.h> + #include <linux/module.h> + #include <linux/of.h> + #include <linux/platform_device.h> ++#include <linux/regmap.h> + #include <linux/usb.h> + #include <linux/usb/otg.h> + + #include "fotg210.h" + ++/* ++ * Gemini-specific initialization function, only executed on the ++ * Gemini SoC using the global misc control register. ++ * ++ * The gemini USB blocks are connected to either Mini-A (host mode) or ++ * Mini-B (peripheral mode) plugs. There is no role switch support on the ++ * Gemini SoC, just either-or. ++ */ ++#define GEMINI_GLOBAL_MISC_CTRL 0x30 ++#define GEMINI_MISC_USB0_WAKEUP BIT(14) ++#define GEMINI_MISC_USB1_WAKEUP BIT(15) ++#define GEMINI_MISC_USB0_VBUS_ON BIT(22) ++#define GEMINI_MISC_USB1_VBUS_ON BIT(23) ++#define GEMINI_MISC_USB0_MINI_B BIT(29) ++#define GEMINI_MISC_USB1_MINI_B BIT(30) ++ ++static int fotg210_gemini_init(struct device *dev, struct resource *res, ++ enum usb_dr_mode mode) ++{ ++ struct device_node *np = dev->of_node; ++ struct regmap *map; ++ bool wakeup; ++ u32 mask, val; ++ int ret; ++ ++ map = syscon_regmap_lookup_by_phandle(np, "syscon"); ++ if (IS_ERR(map)) { ++ dev_err(dev, "no syscon\n"); ++ return PTR_ERR(map); ++ } ++ wakeup = of_property_read_bool(np, "wakeup-source"); ++ ++ /* ++ * Figure out if this is USB0 or USB1 by simply checking the ++ * physical base address. ++ */ ++ mask = 0; ++ if (res->start == 0x69000000) { ++ mask = GEMINI_MISC_USB1_VBUS_ON | GEMINI_MISC_USB1_MINI_B | ++ GEMINI_MISC_USB1_WAKEUP; ++ if (mode == USB_DR_MODE_HOST) ++ val = GEMINI_MISC_USB1_VBUS_ON; ++ else ++ val = GEMINI_MISC_USB1_MINI_B; ++ if (wakeup) ++ val |= GEMINI_MISC_USB1_WAKEUP; ++ } else { ++ mask = GEMINI_MISC_USB0_VBUS_ON | GEMINI_MISC_USB0_MINI_B | ++ GEMINI_MISC_USB0_WAKEUP; ++ if (mode == USB_DR_MODE_HOST) ++ val = GEMINI_MISC_USB0_VBUS_ON; ++ else ++ val = GEMINI_MISC_USB0_MINI_B; ++ if (wakeup) ++ val |= GEMINI_MISC_USB0_WAKEUP; ++ } ++ ++ ret = regmap_update_bits(map, GEMINI_GLOBAL_MISC_CTRL, mask, val); ++ if (ret) { ++ dev_err(dev, "failed to initialize Gemini PHY\n"); ++ return ret; ++ } ++ ++ dev_info(dev, "initialized Gemini PHY in %s mode\n", ++ (mode == USB_DR_MODE_HOST) ? "host" : "gadget"); ++ return 0; ++} ++ + static int fotg210_probe(struct platform_device *pdev) + { + struct device *dev = &pdev->dev; +@@ -22,6 +93,15 @@ static int fotg210_probe(struct platform + + mode = usb_get_dr_mode(dev); + ++ if (of_device_is_compatible(dev->of_node, "cortina,gemini-usb")) { ++ struct resource *res; ++ ++ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); ++ ret = fotg210_gemini_init(dev, res, mode); ++ if (ret) ++ return ret; ++ } ++ + if (mode == USB_DR_MODE_PERIPHERAL) + ret = fotg210_udc_probe(pdev); + else |