gemini: Add kernel v6.1 patches

[openwrt/staging/wigyori.git] / target / linux / gemini / patches-6.1 / 0005-usb-fotg2-add-Gemini-specific-handling.patch

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 (file)
index 0000000..daf8d85
--- /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