diff options
Diffstat (limited to 'target/linux/bcm53xx/patches-4.4/191-usb-xhci-add-Broadcom-specific-fake-doorbell.patch')
| -rw-r--r-- | target/linux/bcm53xx/patches-4.4/191-usb-xhci-add-Broadcom-specific-fake-doorbell.patch | 145 |
1 files changed, 0 insertions, 145 deletions
diff --git a/target/linux/bcm53xx/patches-4.4/191-usb-xhci-add-Broadcom-specific-fake-doorbell.patch b/target/linux/bcm53xx/patches-4.4/191-usb-xhci-add-Broadcom-specific-fake-doorbell.patch deleted file mode 100644 index 4a206d2cc2..0000000000 --- a/target/linux/bcm53xx/patches-4.4/191-usb-xhci-add-Broadcom-specific-fake-doorbell.patch +++ /dev/null @@ -1,145 +0,0 @@ -From dd0e5f9a6a4aed849bdb80641c2a2350476cede7 Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com> -Date: Sun, 21 Jun 2015 11:10:49 +0200 -Subject: [PATCH v3 2/6] usb: xhci: add Broadcom specific fake doorbell -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -This fixes problem with controller seeing devices only in some small -percentage of cold boots. -This quirk is also added to the platform data so we can activate it -when we register our platform driver. - -Signed-off-by: Rafał Miłecki <zajec5@gmail.com> -Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de> ---- - drivers/usb/host/xhci-plat.c | 3 +++ - drivers/usb/host/xhci.c | 57 +++++++++++++++++++++++++++++++++++++--- - drivers/usb/host/xhci.h | 1 + - include/linux/usb/xhci_pdriver.h | 1 + - 4 files changed, 59 insertions(+), 3 deletions(-) - ---- a/drivers/usb/host/xhci-plat.c -+++ b/drivers/usb/host/xhci-plat.c -@@ -38,12 +38,19 @@ static const struct xhci_driver_override - - 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; -+ struct usb_xhci_pdata *pdata = dev_get_platdata(&pdev->dev); -+ - /* - * 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 (pdata && pdata->usb3_fake_doorbell) -+ xhci->quirks |= XHCI_FAKE_DOORBELL; - } - - /* called during probe() after chip reset completes */ ---- a/drivers/usb/host/xhci.c -+++ b/drivers/usb/host/xhci.c -@@ -121,6 +121,39 @@ int xhci_halt(struct xhci_hcd *xhci) - return ret; - } - -+static int xhci_fake_doorbell(struct xhci_hcd *xhci, int slot_id) -+{ -+ u32 temp; -+ -+ /* alloc a virt device for 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 register 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%x\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); -+ -+ return 0; -+} -+ - /* - * Set the run bit and wait for the host to be running. - */ -@@ -568,10 +601,25 @@ 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 out_err; -+ } -+ if (xhci->quirks & XHCI_FAKE_DOORBELL) { -+ err = xhci_fake_doorbell(xhci, 1); -+ if (err) -+ goto out_err; -+ -+ err = xhci_start(xhci); -+ if (err) { -+ err = -ENODEV; -+ goto out_err; -+ } - } -+ - xhci->shared_hcd->state = HC_STATE_RUNNING; - xhci->cmd_ring_state = CMD_RING_STATE_RUNNING; - -@@ -581,6 +629,9 @@ static int xhci_run_finished(struct xhci - xhci_dbg_trace(xhci, trace_xhci_dbg_init, - "Finished xhci_run for USB3 roothub"); - return 0; -+out_err: -+ xhci_halt(xhci); -+ return err; - } - - /* ---- a/drivers/usb/host/xhci.h -+++ b/drivers/usb/host/xhci.h -@@ -1631,6 +1631,7 @@ struct xhci_hcd { - /* For controllers with a broken beyond repair streams implementation */ - #define XHCI_BROKEN_STREAMS (1 << 19) - #define XHCI_PME_STUCK_QUIRK (1 << 20) -+#define XHCI_FAKE_DOORBELL (1 << 21) - unsigned int num_active_eps; - unsigned int limit_active_eps; - /* There are two roothubs to keep track of bus suspend info for */ ---- a/include/linux/usb/xhci_pdriver.h -+++ b/include/linux/usb/xhci_pdriver.h -@@ -22,6 +22,7 @@ - */ - struct usb_xhci_pdata { - unsigned usb3_lpm_capable:1; -+ unsigned usb3_fake_doorbell:1; - }; - - #endif /* __USB_CORE_XHCI_PDRIVER_H */ |