kernel: remove support for kernel 4.19

[openwrt/openwrt.git] / target / linux / bcm53xx / patches-4.19 / 180-usb-xhci-add-support-for-performing-fake-doorbell.patch

diff --git a/target/linux/bcm53xx/patches-4.19/180-usb-xhci-add-support-for-performing-fake-doorbell.patch b/target/linux/bcm53xx/patches-4.19/180-usb-xhci-add-support-for-performing-fake-doorbell.patch
deleted file mode 100644 (file)
index cd4d963..0000000
--- a/target/linux/bcm53xx/patches-4.19/180-usb-xhci-add-support-for-performing-fake-doorbell.patch
+++ /dev/null
@@ -1,137 +0,0 @@
-From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
-Date: Sat, 1 Oct 2016 22:54:48 +0200
-Subject: [PATCH] usb: xhci: add support for performing fake doorbell
-
-Broadcom's Northstar XHCI controllers seem to need a special start
-procedure to work correctly. There isn't any official documentation of
-this, the problem is that controller doesn't detect any connected
-devices with default setup. Moreover connecting USB device to controller
-that doesn't run properly can cause SoC's watchdog issues.
-
-A workaround that was successfully tested on multiple devices is to
-perform a fake doorbell. This patch adds code for doing this and enables
-it on BCM4708 family.
----
- drivers/usb/host/xhci-plat.c |  6 +++++
- drivers/usb/host/xhci.c      | 63 +++++++++++++++++++++++++++++++++++++++++---
- drivers/usb/host/xhci.h      |  1 +
- 3 files changed, 67 insertions(+), 3 deletions(-)
-
---- a/drivers/usb/host/xhci-plat.c
-+++ b/drivers/usb/host/xhci-plat.c
-@@ -65,12 +65,18 @@ static int xhci_priv_resume_quirk(struct
- 
- static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
- {
-+      struct platform_device  *pdev = to_platform_device(dev);
-+      struct device_node      *node = pdev->dev.of_node;
-+
-       /*
-        * As of now platform drivers don't provide MSI support so we ensure
-        * here that the generic code does not try to make a pci_dev from our
-        * dev struct in order to setup MSI
-        */
-       xhci->quirks |= XHCI_PLAT;
-+
-+      if (node && of_machine_is_compatible("brcm,bcm4708"))
-+              xhci->quirks |= XHCI_FAKE_DOORBELL;
- }
- 
- /* called during probe() after chip reset completes */
---- a/drivers/usb/host/xhci.c
-+++ b/drivers/usb/host/xhci.c
-@@ -156,6 +156,49 @@ int xhci_start(struct xhci_hcd *xhci)
-       return ret;
- }
- 
-+/**
-+ * xhci_fake_doorbell - Perform a fake doorbell on a specified slot
-+ *
-+ * Some controllers require a fake doorbell to start correctly. Without that
-+ * they simply don't detect any devices.
-+ */
-+static int xhci_fake_doorbell(struct xhci_hcd *xhci, int slot_id)
-+{
-+      u32 temp;
-+
-+      /* Alloc a virt device for that slot */
-+      if (!xhci_alloc_virt_device(xhci, slot_id, NULL, GFP_NOIO)) {
-+              xhci_warn(xhci, "Could not allocate xHCI USB device data structures\n");
-+              return -ENOMEM;
-+      }
-+
-+      /* Ring fake doorbell for slot_id ep 0 */
-+      xhci_ring_ep_doorbell(xhci, slot_id, 0, 0);
-+      usleep_range(1000, 1500);
-+
-+      /* Read the status to check if HSE is set or not */
-+      temp = readl(&xhci->op_regs->status);
-+
-+      /* Clear HSE if set */
-+      if (temp & STS_FATAL) {
-+              xhci_dbg(xhci, "HSE problem detected, status: 0x%08x\n", temp);
-+              temp &= ~0x1fff;
-+              temp |= STS_FATAL;
-+              writel(temp, &xhci->op_regs->status);
-+              usleep_range(1000, 1500);
-+              readl(&xhci->op_regs->status);
-+      }
-+
-+      /* Free virt device */
-+      xhci_free_virt_device(xhci, slot_id);
-+
-+      /* We're done if controller is already running */
-+      if (readl(&xhci->op_regs->command) & CMD_RUN)
-+              return 0;
-+
-+      return xhci_start(xhci);
-+}
-+
- /*
-  * Reset a halted HC.
-  *
-@@ -603,10 +646,20 @@ static int xhci_init(struct usb_hcd *hcd
- 
- static int xhci_run_finished(struct xhci_hcd *xhci)
- {
--      if (xhci_start(xhci)) {
--              xhci_halt(xhci);
--              return -ENODEV;
-+      int err;
-+
-+      err = xhci_start(xhci);
-+      if (err) {
-+              err = -ENODEV;
-+              goto err_halt;
-       }
-+
-+      if (xhci->quirks & XHCI_FAKE_DOORBELL) {
-+              err = xhci_fake_doorbell(xhci, 1);
-+              if (err)
-+                      goto err_halt;
-+      }
-+
-       xhci->shared_hcd->state = HC_STATE_RUNNING;
-       xhci->cmd_ring_state = CMD_RING_STATE_RUNNING;
- 
-@@ -616,6 +669,10 @@ static int xhci_run_finished(struct xhci
-       xhci_dbg_trace(xhci, trace_xhci_dbg_init,
-                       "Finished xhci_run for USB3 roothub");
-       return 0;
-+
-+err_halt:
-+      xhci_halt(xhci);
-+      return err;
- }
- 
- /*
---- a/drivers/usb/host/xhci.h
-+++ b/drivers/usb/host/xhci.h
-@@ -1872,6 +1872,7 @@ struct xhci_hcd {
- #define XHCI_ZERO_64B_REGS    BIT_ULL(32)
- #define XHCI_RESET_PLL_ON_DISCONNECT  BIT_ULL(34)
- #define XHCI_SNPS_BROKEN_SUSPEND    BIT_ULL(35)
-+#define XHCI_FAKE_DOORBELL    BIT_ULL(36)
- 
-       unsigned int            num_active_eps;
-       unsigned int            limit_active_eps;