diff options
Diffstat (limited to 'target/linux/bcm53xx/patches-3.18/820-xhci-add-Broadcom-specific-fake-doorbell.patch')
-rw-r--r-- | target/linux/bcm53xx/patches-3.18/820-xhci-add-Broadcom-specific-fake-doorbell.patch | 94 |
1 files changed, 0 insertions, 94 deletions
diff --git a/target/linux/bcm53xx/patches-3.18/820-xhci-add-Broadcom-specific-fake-doorbell.patch b/target/linux/bcm53xx/patches-3.18/820-xhci-add-Broadcom-specific-fake-doorbell.patch deleted file mode 100644 index d459520d3f..0000000000 --- a/target/linux/bcm53xx/patches-3.18/820-xhci-add-Broadcom-specific-fake-doorbell.patch +++ /dev/null @@ -1,94 +0,0 @@ -From 9cc14ca0aae53c16d10ffea49848ac61a5015562 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] 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. - -Signed-off-by: Rafał Miłecki <zajec5@gmail.com> ---- - drivers/usb/host/xhci.c | 62 +++++++++++++++++++++++++++++++++++++++++++++++++ - 1 file changed, 62 insertions(+) - ---- a/drivers/usb/host/xhci.c -+++ b/drivers/usb/host/xhci.c -@@ -122,6 +122,64 @@ int xhci_halt(struct xhci_hcd *xhci) - return ret; - } - -+#ifdef CONFIG_ARCH_BCM_5301X -+int xhci_fake_doorbell(struct xhci_hcd *xhci, int slot_id) -+{ -+ unsigned int temp1, ret; -+ -+ /* alloc a virt device for slot */ -+ if (!xhci_alloc_virt_device(xhci, slot_id, 0, GFP_NOIO)) { -+ xhci_warn(xhci, "Could not allocate xHCI USB device data structures\n"); -+ return 1; -+ } -+ -+ /* ring fake doorbell for slot_id ep 0 */ -+ xhci_ring_ep_doorbell(xhci, slot_id, 0, 0); -+ mdelay(1); -+ -+ /* read the status register to check if HSE is set or not? */ -+ temp1 = readl(&xhci->op_regs->status); -+ xhci_dbg(xhci, "op reg status = %x\n",temp1); -+ -+ /* clear HSE if set */ -+ if(temp1 & STS_FATAL) { -+ xhci_dbg(xhci, "HSE problem detected\n"); -+ temp1 &= ~(0x1fff); -+ temp1 |= STS_FATAL; -+ xhci_dbg(xhci, "temp1=%x\n",temp1); -+ writel(temp1, &xhci->op_regs->status); -+ mdelay(1); -+ temp1 = readl(&xhci->op_regs->status); -+ xhci_dbg(xhci, "After clear op reg status=%x\n", temp1); -+ } -+ -+ /* Free virt device */ -+ xhci_free_virt_device(xhci, slot_id); -+ -+ /* Run the controller if needed */ -+ temp1 = readl(&xhci->op_regs->command); -+ if (temp1 & CMD_RUN) -+ return 0; -+ temp1 |= (CMD_RUN); -+ -+ writel(temp1, &xhci->op_regs->command); -+ /* -+ * Wait for the HCHalted Status bit to be 0 to indicate the host is running. -+ */ -+ ret = xhci_handshake(xhci, &xhci->op_regs->status, -+ STS_HALT, 0, XHCI_MAX_HALT_USEC); -+ -+ if (ret == -ETIMEDOUT) { -+ xhci_err(xhci, "Host took too long to start, " -+ "waited %u microseconds.\n", -+ XHCI_MAX_HALT_USEC); -+ return 1; -+ } -+ -+ return 0; -+} -+#endif /* CONFIG_ARCH_BCM_5301X */ -+ - /* - * Set the run bit and wait for the host to be running. - */ -@@ -146,6 +204,10 @@ static int xhci_start(struct xhci_hcd *x - xhci_err(xhci, "Host took too long to start, " - "waited %u microseconds.\n", - XHCI_MAX_HALT_USEC); -+#ifdef CONFIG_ARCH_BCM_5301X -+ xhci_fake_doorbell(xhci, 1); -+#endif /* CONFIG_ARCH_BCM_5301X */ -+ - if (!ret) - xhci->xhc_state &= ~XHCI_STATE_HALTED; - return ret; |