diff options
Diffstat (limited to 'target/linux/bcm53xx/patches-5.10/180-usb-xhci-add-support-for-performing-fake-doorbell.patch')
| -rw-r--r-- | target/linux/bcm53xx/patches-5.10/180-usb-xhci-add-support-for-performing-fake-doorbell.patch | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/target/linux/bcm53xx/patches-5.10/180-usb-xhci-add-support-for-performing-fake-doorbell.patch b/target/linux/bcm53xx/patches-5.10/180-usb-xhci-add-support-for-performing-fake-doorbell.patch deleted file mode 100644 index 5254b3fbbe..0000000000 --- a/target/linux/bcm53xx/patches-5.10/180-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 -@@ -77,6 +77,8 @@ static int xhci_priv_resume_quirk(struct - static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci) - { - struct xhci_plat_priv *priv = xhci_to_priv(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 -@@ -84,6 +86,9 @@ static void xhci_plat_quirks(struct devi - * dev struct in order to setup MSI - */ - xhci->quirks |= XHCI_PLAT | priv->quirks; -+ -+ 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 -@@ -159,6 +159,49 @@ 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. - * -@@ -612,10 +655,20 @@ 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; - -@@ -625,6 +678,10 @@ 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 -@@ -1895,6 +1895,7 @@ struct xhci_hcd { - #define XHCI_EP_CTX_BROKEN_DCS BIT_ULL(42) - #define XHCI_SUSPEND_RESUME_CLKS BIT_ULL(43) - #define XHCI_RESET_TO_DEFAULT BIT_ULL(44) -+#define XHCI_FAKE_DOORBELL BIT_ULL(45) - - unsigned int num_active_eps; - unsigned int limit_active_eps; |