From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751992AbdDALCt (ORCPT ); Sat, 1 Apr 2017 07:02:49 -0400 Received: from mail7.pr.hu ([87.242.0.7]:45562 "EHLO mail7.pr.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751536AbdDALCq (ORCPT ); Sat, 1 Apr 2017 07:02:46 -0400 From: Zoltan Boszormenyi To: linux-usb@vger.kernel.org, linux-watchdog@vger.kernel.org, linux-i2c@vger.kernel.org Cc: linux-kernel@vger.kernel.org, =?UTF-8?q?B=C3=B6sz=C3=B6rm=C3=A9nyi=20Zolt=C3=A1n?= Subject: [PATCH 1/3] usb: pci-quirks: Add a header for SB800 I/O ports and mutex for locking Date: Sat, 1 Apr 2017 13:02:21 +0200 Message-Id: <20170401110223.12056-2-zboszor@pr.hu> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20170401110223.12056-1-zboszor@pr.hu> References: <20170401100609.9054-1-zboszor@pr.hu> <20170401110223.12056-1-zboszor@pr.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Spam-Score: 0.7 (/) X-Scan-Signature: 121d2db6017a7bb2c7a9246e5803eee8 X-Spam-Tracer: backend.mail.pr.hu 0.7 20170401110241Z Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Böszörményi Zoltán This patch adds: * a mutex in the USB PCI quirks code for synchronizing access to the I/O ports on SB800 * a new header that contains symbols for the index and data I/O ports and wrappers for locking and unlocking the mutex. * locking around the I/O port access for SB800 Signed-off-by: Zoltan Boszormenyi --- drivers/usb/host/pci-quirks.c | 14 ++++++++++---- include/linux/sb800.h | 15 +++++++++++++++ 2 files changed, 25 insertions(+), 4 deletions(-) create mode 100644 include/linux/sb800.h diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c index a9a1e4c..9b0445c 100644 --- a/drivers/usb/host/pci-quirks.c +++ b/drivers/usb/host/pci-quirks.c @@ -15,6 +15,7 @@ #include #include #include +#include #include "pci-quirks.h" #include "xhci-ext-caps.h" @@ -279,6 +280,9 @@ bool usb_amd_prefetch_quirk(void) } EXPORT_SYMBOL_GPL(usb_amd_prefetch_quirk); +DEFINE_MUTEX(sb800_mutex); +EXPORT_SYMBOL_GPL(sb800_mutex); + /* * The hardware normally enables the A-link power management feature, which * lets the system lower the power consumption in idle states. @@ -314,11 +318,13 @@ static void usb_amd_quirk_pll(int disable) if (amd_chipset.sb_type.gen == AMD_CHIPSET_SB800 || amd_chipset.sb_type.gen == AMD_CHIPSET_HUDSON2 || amd_chipset.sb_type.gen == AMD_CHIPSET_BOLTON) { - outb_p(AB_REG_BAR_LOW, 0xcd6); - addr_low = inb_p(0xcd7); - outb_p(AB_REG_BAR_HIGH, 0xcd6); - addr_high = inb_p(0xcd7); + enter_sb800(); + outb_p(AB_REG_BAR_LOW, SB800_PIIX4_SMB_IDX); + addr_low = inb_p(SB800_PIIX4_SMB_DATA); + outb_p(AB_REG_BAR_HIGH, SB800_PIIX4_SMB_IDX); + addr_high = inb_p(SB800_PIIX4_SMB_DATA); addr = addr_high << 8 | addr_low; + leave_sb800(); outl_p(0x30, AB_INDX(addr)); outl_p(0x40, AB_DATA(addr)); diff --git a/include/linux/sb800.h b/include/linux/sb800.h new file mode 100644 index 0000000..5650b7d --- /dev/null +++ b/include/linux/sb800.h @@ -0,0 +1,15 @@ + +#ifndef SB800_H +#define SB800_H + +#include + +#define SB800_PIIX4_SMB_IDX 0xcd6 +#define SB800_PIIX4_SMB_DATA 0xcd7 + +extern struct mutex sb800_mutex; + +#define enter_sb800() mutex_lock(&sb800_mutex) +#define leave_sb800() mutex_unlock(&sb800_mutex) + +#endif -- 2.9.3