[kernel] Add patch to fix Ricoh e823 SD card readers (rhbz 722509)

[Josh Boyer]

commit 220cb1c7cb10259793d1126a9dbbf8943209dd28
Author: Josh Boyer <jwboyer at redhat.com>
Date:   Thu Oct 6 14:31:40 2011 -0400

    Add patch to fix Ricoh e823 SD card readers (rhbz 722509)

 TODO                                               |    1 +
 kernel.spec                                        |   12 +++-
 ...check-for-lower-base-frequency-quirk-for-.patch |   73 ++++++++++++++++++++
 3 files changed, 85 insertions(+), 1 deletions(-)
---
diff --git a/TODO b/TODO
index 7d13d68..ff6db7d 100644
--- a/TODO
+++ b/TODO
@@ -16,6 +16,7 @@
 * usb-add-quirk-for-logitech-webcams.patch
 * add-macbookair41-keyboard.patch
 * ucvideo-fix-crash-when-linking-entities.patch
+* mmc-Always-check-for-lower-base-frequency-quirk-for-.patch (also CC'd stable)
 
 **** Other stuff that should go upstream (in decreasing likelyhood) ************************************
 
diff --git a/kernel.spec b/kernel.spec
index a04e181..445f153 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -51,7 +51,7 @@ Summary: The Linux kernel
 # For non-released -rc kernels, this will be prepended with "0.", so
 # for example a 3 here will become 0.3
 #
-%global baserelease 0
+%global baserelease 1
 %global fedora_build %{baserelease}
 
 # base_sublevel is the kernel version we're starting with and patching
@@ -733,6 +733,10 @@ Patch20000: utrace.patch
 # Flattened devicetree support
 Patch21000: arm-omap-dt-compat.patch
 Patch21001: arm-smsc-support-reading-mac-address-from-device-tree.patch
+
+#rhbz #722509
+Patch21002: mmc-Always-check-for-lower-base-frequency-quirk-for-.patch
+
 %endif
 
 BuildRoot: %{_tmppath}/kernel-%{KVERREL}-root
@@ -1341,6 +1345,9 @@ ApplyPatch hvcs_pi_buf_alloc.patch
 
 ApplyPatch powerpc-Fix-deadlock-in-icswx-code.patch
 
+#rhbz #722509
+ApplyPatch mmc-Always-check-for-lower-base-frequency-quirk-for-.patch
+
 # utrace.
 ApplyPatch utrace.patch
 
@@ -2052,6 +2059,9 @@ fi
 #                 ||----w |
 #                 ||     ||
 %changelog
+* Thu Oct 06 2011 Josh Boyer <jwboyer at redhat.com>
+- Add patch to fix base frequency check for Ricoh e823 devices (rhbz 722509)
+
 * Thu Oct 06 2011 Dave Jones <davej at redhat.com>
 - Taint if virtualbox modules have been loaded.
 
diff --git a/mmc-Always-check-for-lower-base-frequency-quirk-for-.patch b/mmc-Always-check-for-lower-base-frequency-quirk-for-.patch
new file mode 100644
index 0000000..2d7caad
--- /dev/null
+++ b/mmc-Always-check-for-lower-base-frequency-quirk-for-.patch
@@ -0,0 +1,73 @@
+From 65ff02dff67bf26a9c27d9aa11a30eaf3d28469e Mon Sep 17 00:00:00 2001
+From: Josh Boyer <jwboyer at redhat.com>
+Date: Wed, 5 Oct 2011 11:29:57 -0400
+Subject: [PATCH] mmc: Always check for lower base frequency quirk for Ricoh
+ 1180:e823
+
+Commit 15bed0f2f added a quirk for the e823 Ricoh card reader to lower the
+base frequency.  However, the quirk first checks to see if the proprietary
+MMC controller is disabled, and returns if so.  On some devices, such as the
+Lenovo X220, the MMC controller is already disabled by firmware it seems,
+but the frequency change is still needed so sdhci-pci can talk to the cards.
+Since the MMC controller is disabled, the frequency fixup was never being run
+on these machines.
+
+This moves the e823 check above the MMC controller check so that it always
+gets run.
+
+This fixes https://bugzilla.redhat.com/show_bug.cgi?id=722509
+
+Signed-off-by: Josh Boyer <jwboyer at redhat.com>
+---
+ drivers/pci/quirks.c |   28 ++++++++++++++--------------
+ 1 files changed, 14 insertions(+), 14 deletions(-)
+
+diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
+index 1196f61..cec4629 100644
+--- a/drivers/pci/quirks.c
++++ b/drivers/pci/quirks.c
+@@ -2745,20 +2745,6 @@ static void ricoh_mmc_fixup_r5c832(struct pci_dev *dev)
+ 	/* disable must be done via function #0 */
+ 	if (PCI_FUNC(dev->devfn))
+ 		return;
+-
+-	pci_read_config_byte(dev, 0xCB, &disable);
+-
+-	if (disable & 0x02)
+-		return;
+-
+-	pci_read_config_byte(dev, 0xCA, &write_enable);
+-	pci_write_config_byte(dev, 0xCA, 0x57);
+-	pci_write_config_byte(dev, 0xCB, disable | 0x02);
+-	pci_write_config_byte(dev, 0xCA, write_enable);
+-
+-	dev_notice(&dev->dev, "proprietary Ricoh MMC controller disabled (via firewire function)\n");
+-	dev_notice(&dev->dev, "MMC cards are now supported by standard SDHCI controller\n");
+-
+ 	/*
+ 	 * RICOH 0xe823 SD/MMC card reader fails to recognize
+ 	 * certain types of SD/MMC cards. Lowering the SD base
+@@ -2781,6 +2767,20 @@ static void ricoh_mmc_fixup_r5c832(struct pci_dev *dev)
+ 
+ 		dev_notice(&dev->dev, "MMC controller base frequency changed to 50Mhz.\n");
+ 	}
++
++	pci_read_config_byte(dev, 0xCB, &disable);
++
++	if (disable & 0x02)
++		return;
++
++	pci_read_config_byte(dev, 0xCA, &write_enable);
++	pci_write_config_byte(dev, 0xCA, 0x57);
++	pci_write_config_byte(dev, 0xCB, disable | 0x02);
++	pci_write_config_byte(dev, 0xCA, write_enable);
++
++	dev_notice(&dev->dev, "proprietary Ricoh MMC controller disabled (via firewire function)\n");
++	dev_notice(&dev->dev, "MMC cards are now supported by standard SDHCI controller\n");
++
+ }
+ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5C832, ricoh_mmc_fixup_r5c832);
+ DECLARE_PCI_FIXUP_RESUME_EARLY(PCI_VENDOR_ID_RICOH, PCI_DEVICE_ID_RICOH_R5C832, ricoh_mmc_fixup_r5c832);
+-- 
+1.7.6.4
+