From 0e4987639a774d08b69c1c58774f3430f6083d4f Mon Sep 17 00:00:00 2001
From: David Brownell <david-b@pacbell.net>
Date: Mon, 18 Apr 2005 17:39:30 -0700
Subject: [PATCH] [PATCH] USB: OHCI on Compaq Aramada 7400

This adds a quirk to the OHCI driver that lets it work with an old
Compaq implementation.  It also removes some needless strings from
the non-debug version of the driver.

Signed-off-by: Chris Clayton <chris_clayton@f1internet.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 drivers/usb/host/ohci-pci.c | 17 ++++++++++++++---
 drivers/usb/host/ohci-q.c   | 13 +++++++++++--
 drivers/usb/host/ohci.h     |  1 +
 3 files changed, 26 insertions(+), 5 deletions(-)

diff --git a/drivers/usb/host/ohci-pci.c b/drivers/usb/host/ohci-pci.c
index f30118b5f9a..57fd07d0054 100644
--- a/drivers/usb/host/ohci-pci.c
+++ b/drivers/usb/host/ohci-pci.c
@@ -54,7 +54,7 @@ ohci_pci_start (struct usb_hcd *hcd)
 		if (pdev->vendor == PCI_VENDOR_ID_AMD
 				&& pdev->device == 0x740c) {
 			ohci->flags = OHCI_QUIRK_AMD756;
-			ohci_info (ohci, "AMD756 erratum 4 workaround\n");
+			ohci_dbg (ohci, "AMD756 erratum 4 workaround\n");
 			// also somewhat erratum 10 (suspend/resume issues)
 		}
 
@@ -68,7 +68,7 @@ ohci_pci_start (struct usb_hcd *hcd)
 		 */
 		else if (pdev->vendor == PCI_VENDOR_ID_OPTI
 				&& pdev->device == 0xc861) {
-			ohci_info (ohci,
+			ohci_dbg (ohci,
 				"WARNING: OPTi workarounds unavailable\n");
 		}
 
@@ -84,9 +84,20 @@ ohci_pci_start (struct usb_hcd *hcd)
 			if (b && b->device == PCI_DEVICE_ID_NS_87560_LIO
 					&& b->vendor == PCI_VENDOR_ID_NS) {
 				ohci->flags |= OHCI_QUIRK_SUPERIO;
-				ohci_info (ohci, "Using NSC SuperIO setup\n");
+				ohci_dbg (ohci, "Using NSC SuperIO setup\n");
 			}
 		}
+
+		/* Check for Compaq's ZFMicro chipset, which needs short 
+		 * delays before control or bulk queues get re-activated
+		 * in finish_unlinks()
+		 */
+		else if (pdev->vendor == PCI_VENDOR_ID_COMPAQ
+				&& pdev->device  == 0xa0f8) {
+			ohci->flags |= OHCI_QUIRK_ZFMICRO;
+			ohci_dbg (ohci,
+				"enabled Compaq ZFMicro chipset quirk\n");
+		}
 	}
 
 	/* NOTE: there may have already been a first reset, to
diff --git a/drivers/usb/host/ohci-q.c b/drivers/usb/host/ohci-q.c
index c90114a7727..e372306ed0d 100644
--- a/drivers/usb/host/ohci-q.c
+++ b/drivers/usb/host/ohci-q.c
@@ -1021,6 +1021,8 @@ rescan_this:
 
 		if (ohci->ed_controltail) {
 			command |= OHCI_CLF;
+			if (ohci->flags & OHCI_QUIRK_ZFMICRO)
+				mdelay(1);
 			if (!(ohci->hc_control & OHCI_CTRL_CLE)) {
 				control |= OHCI_CTRL_CLE;
 				ohci_writel (ohci, 0,
@@ -1029,6 +1031,8 @@ rescan_this:
 		}
 		if (ohci->ed_bulktail) {
 			command |= OHCI_BLF;
+			if (ohci->flags & OHCI_QUIRK_ZFMICRO)
+				mdelay(1);
 			if (!(ohci->hc_control & OHCI_CTRL_BLE)) {
 				control |= OHCI_CTRL_BLE;
 				ohci_writel (ohci, 0,
@@ -1039,12 +1043,17 @@ rescan_this:
 		/* CLE/BLE to enable, CLF/BLF to (maybe) kickstart */
 		if (control) {
 			ohci->hc_control |= control;
+			if (ohci->flags & OHCI_QUIRK_ZFMICRO)
+				mdelay(1);
  			ohci_writel (ohci, ohci->hc_control,
 					&ohci->regs->control);   
  		}
-		if (command)
+		if (command) {
+			if (ohci->flags & OHCI_QUIRK_ZFMICRO)
+				mdelay(1);
 			ohci_writel (ohci, command, &ohci->regs->cmdstatus);   
- 	}
+	 	}
+	}
 }
 
 
diff --git a/drivers/usb/host/ohci.h b/drivers/usb/host/ohci.h
index 2ba6e2b0210..22e1ac138ac 100644
--- a/drivers/usb/host/ohci.h
+++ b/drivers/usb/host/ohci.h
@@ -396,6 +396,7 @@ struct ohci_hcd {
 #define	OHCI_QUIRK_SUPERIO	0x02			/* natsemi */
 #define	OHCI_QUIRK_INITRESET	0x04			/* SiS, OPTi, ... */
 #define	OHCI_BIG_ENDIAN		0x08			/* big endian HC */
+#define	OHCI_QUIRK_ZFMICRO	0x10			/* Compaq ZFMicro chipset*/
 	// there are also chip quirks/bugs in init logic
 
 };
-- 
2.20.1