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58acb1dd2c
This adds a bunch of patches for the v6.1 Gemini kernel. For v5.15 this was down to a single upstream patch, but for kernel v6.2 I reworked the USB code for FOTG210, so instead of carrying over the half-baked and incomplete patch from v5.15 I just backported all the v6.2 patches, 31 in total, as it creates full device USB mode for e.g. D-Link DNS-313. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
136 lines
4.0 KiB
Diff
136 lines
4.0 KiB
Diff
From f7f6c8aca91093e2f886ec97910b1a7d9a69bf9b Mon Sep 17 00:00:00 2001
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From: Linus Walleij <linus.walleij@linaro.org>
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Date: Wed, 9 Nov 2022 21:05:54 +0100
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Subject: [PATCH 05/29] usb: fotg2: add Gemini-specific handling
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The Cortina Systems Gemini has bolted on a PHY inside the
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silicon that can be handled by six bits in a MISC register in
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the system controller.
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If we are running on Gemini, look up a syscon regmap through
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a phandle and enable VBUS and optionally the Mini-B connector.
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If the device is flagged as "wakeup-source" using the standard
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DT bindings, we also enable this in the global controller for
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respective port.
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Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Link: https://lore.kernel.org/r/20221109200554.1957185-1-linus.walleij@linaro.org
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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---
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--- a/drivers/usb/fotg210/Kconfig
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+++ b/drivers/usb/fotg210/Kconfig
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@@ -5,6 +5,7 @@ config USB_FOTG210
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depends on USB || USB_GADGET
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depends on HAS_DMA && HAS_IOMEM
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default ARCH_GEMINI
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+ select MFD_SYSCON
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help
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Faraday FOTG210 is a dual-mode USB controller that can act
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in both host controller and peripheral controller mode.
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--- a/drivers/usb/fotg210/fotg210-core.c
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+++ b/drivers/usb/fotg210/fotg210-core.c
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@@ -5,15 +5,86 @@
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* whether to proceed with probing the host or the peripheral
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* driver.
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*/
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+#include <linux/bitops.h>
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#include <linux/device.h>
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+#include <linux/mfd/syscon.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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+#include <linux/regmap.h>
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#include <linux/usb.h>
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#include <linux/usb/otg.h>
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#include "fotg210.h"
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+/*
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+ * Gemini-specific initialization function, only executed on the
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+ * Gemini SoC using the global misc control register.
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+ *
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+ * The gemini USB blocks are connected to either Mini-A (host mode) or
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+ * Mini-B (peripheral mode) plugs. There is no role switch support on the
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+ * Gemini SoC, just either-or.
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+ */
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+#define GEMINI_GLOBAL_MISC_CTRL 0x30
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+#define GEMINI_MISC_USB0_WAKEUP BIT(14)
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+#define GEMINI_MISC_USB1_WAKEUP BIT(15)
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+#define GEMINI_MISC_USB0_VBUS_ON BIT(22)
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+#define GEMINI_MISC_USB1_VBUS_ON BIT(23)
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+#define GEMINI_MISC_USB0_MINI_B BIT(29)
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+#define GEMINI_MISC_USB1_MINI_B BIT(30)
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+
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+static int fotg210_gemini_init(struct device *dev, struct resource *res,
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+ enum usb_dr_mode mode)
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+{
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+ struct device_node *np = dev->of_node;
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+ struct regmap *map;
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+ bool wakeup;
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+ u32 mask, val;
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+ int ret;
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+
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+ map = syscon_regmap_lookup_by_phandle(np, "syscon");
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+ if (IS_ERR(map)) {
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+ dev_err(dev, "no syscon\n");
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+ return PTR_ERR(map);
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+ }
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+ wakeup = of_property_read_bool(np, "wakeup-source");
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+
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+ /*
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+ * Figure out if this is USB0 or USB1 by simply checking the
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+ * physical base address.
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+ */
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+ mask = 0;
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+ if (res->start == 0x69000000) {
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+ mask = GEMINI_MISC_USB1_VBUS_ON | GEMINI_MISC_USB1_MINI_B |
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+ GEMINI_MISC_USB1_WAKEUP;
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+ if (mode == USB_DR_MODE_HOST)
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+ val = GEMINI_MISC_USB1_VBUS_ON;
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+ else
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+ val = GEMINI_MISC_USB1_MINI_B;
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+ if (wakeup)
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+ val |= GEMINI_MISC_USB1_WAKEUP;
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+ } else {
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+ mask = GEMINI_MISC_USB0_VBUS_ON | GEMINI_MISC_USB0_MINI_B |
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+ GEMINI_MISC_USB0_WAKEUP;
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+ if (mode == USB_DR_MODE_HOST)
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+ val = GEMINI_MISC_USB0_VBUS_ON;
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+ else
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+ val = GEMINI_MISC_USB0_MINI_B;
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+ if (wakeup)
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+ val |= GEMINI_MISC_USB0_WAKEUP;
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+ }
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+
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+ ret = regmap_update_bits(map, GEMINI_GLOBAL_MISC_CTRL, mask, val);
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+ if (ret) {
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+ dev_err(dev, "failed to initialize Gemini PHY\n");
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+ return ret;
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+ }
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+
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+ dev_info(dev, "initialized Gemini PHY in %s mode\n",
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+ (mode == USB_DR_MODE_HOST) ? "host" : "gadget");
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+ return 0;
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+}
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+
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static int fotg210_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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@@ -22,6 +93,15 @@ static int fotg210_probe(struct platform
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mode = usb_get_dr_mode(dev);
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+ if (of_device_is_compatible(dev->of_node, "cortina,gemini-usb")) {
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+ struct resource *res;
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+
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+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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+ ret = fotg210_gemini_init(dev, res, mode);
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+ if (ret)
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+ return ret;
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+ }
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+
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if (mode == USB_DR_MODE_PERIPHERAL)
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ret = fotg210_udc_probe(pdev);
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else
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