From patchwork Fri Nov 8 14:39:31 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: ChandraShekar Devegowda X-Patchwork-Id: 13867771 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8E14F1E0B67 for ; Fri, 8 Nov 2024 08:53:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.18 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731056033; cv=none; b=qtOP3klbrM5gtyomgJXiloCOHzTeS3SrmATzGYfareIICjIzr/jt+fZbgyscp64KP6TrdvTqiAEBkOQ30KzUvIXR1lDC/67/vlTol0M75uRxHyoXDv4dZGshpqtER8Y1d+aY0iFfajZKzizzTzTBR8SBFGgL2B/SH643kfnH5DA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731056033; c=relaxed/simple; bh=57Bdm0d2A360agOcbxEocWypC1x7qEkttD6y9eh8mJc=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=T34kgGhQw0NxW1SgwGdYe8KLqi0AOEd4bGr6U6yZXO7ASlb7xYkmSQgKUfW3wTMnCXCTitQH92n3IUtE87iJiRFLiicS/7hdE7vDZ2EUinhaUDUaRZ3mBznYqOrg70BCYzaWEEY8aMibusZ9rWENAov3vPpA/xZn1fMMptYGQE8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=e3u7ySa/; arc=none smtp.client-ip=198.175.65.18 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="e3u7ySa/" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1731056032; x=1762592032; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=57Bdm0d2A360agOcbxEocWypC1x7qEkttD6y9eh8mJc=; b=e3u7ySa/ttWAHAkNjdSZ1AKkoS543myfdvV/vCLBe55rHBkfwNaYeUs+ u2cXni4XC5aha0k5G9bVXmHMKMBIEfDh9i3ICkqesIa4TuAI+QoUPTChQ 8D2p3U8Sj2QRHvPeFXCQwNCkMvoAxD8AsMYd1Eph54yacYC4ErScI0w5G Fw2KrDNwhFXT+Sx/g5+IMoM21WHoYpgPALi/XLnmgvcjwTTT6fwpr1hbs cltTW7mEv5MKKaT2rFgO74s+DAB6EZyP2W8WB3rRZj/avqi0M3l5pF3mw r0DjwRjM7kkWLKOI2OJYcXvWeNs0Aev1bO9TkT2pmgK19LbOwVMi96M4E g==; X-CSE-ConnectionGUID: QJwKQgtLTimXk415FTiwGw== X-CSE-MsgGUID: ANwlCrbqR224GZbvD/EeWQ== X-IronPort-AV: E=McAfee;i="6700,10204,11222"; a="31098320" X-IronPort-AV: E=Sophos;i="6.11,199,1725346800"; d="scan'208";a="31098320" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by orvoesa110.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Nov 2024 00:53:51 -0800 X-CSE-ConnectionGUID: 56pdFxV7SN6mSQ3ug191cg== X-CSE-MsgGUID: U+LI7bEIQBKDkZgluxNrew== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,137,1728975600"; d="scan'208";a="85076186" Received: from bsinu234.iind.intel.com ([10.66.226.187]) by fmviesa007.fm.intel.com with ESMTP; 08 Nov 2024 00:53:49 -0800 From: ChandraShekar Devegowda To: linux-bluetooth@vger.kernel.org Cc: ravishankar.srivatsa@intel.com, chethan.tumkur.narayan@intel.com, ChandraShekar Devegowda , Kiran K Subject: [PATCH v2] Bluetooth: btintel_pcie: Support suspend-resume Date: Fri, 8 Nov 2024 16:39:31 +0200 Message-Id: <20241108143931.2422947-1-chandrashekar.devegowda@intel.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This patch contains the changes in driver for vendor specific handshake during enter of D3 and D0 exit. Command to test host initiated wake up after 60seconds sudo rtcwake -m mem-s 60 logs from testing: Bluetooth: hci0: BT device resumed to D0 in 1016 usecs Signed-off-by: Kiran K Signed-off-by: ChandraShekar Devegowda --- drivers/bluetooth/btintel_pcie.c | 58 ++++++++++++++++++++++++++++++++ drivers/bluetooth/btintel_pcie.h | 4 +++ 2 files changed, 62 insertions(+) diff --git a/drivers/bluetooth/btintel_pcie.c b/drivers/bluetooth/btintel_pcie.c index 2b79952f3628..49b78d3ecdf9 100644 --- a/drivers/bluetooth/btintel_pcie.c +++ b/drivers/bluetooth/btintel_pcie.c @@ -273,6 +273,12 @@ static int btintel_pcie_reset_bt(struct btintel_pcie_data *data) return reg == 0 ? 0 : -ENODEV; } +static void btintel_pcie_set_persistence_mode(struct btintel_pcie_data *data) +{ + btintel_pcie_set_reg_bits(data, BTINTEL_PCIE_CSR_HW_BOOT_CONFIG, + BTINTEL_PCIE_CSR_HW_BOOT_CONFIG_KEEP_ON); +} + /* This function enables BT function by setting BTINTEL_PCIE_CSR_FUNC_CTRL_MAC_INIT bit in * BTINTEL_PCIE_CSR_FUNC_CTRL_REG register and wait for MSI-X with * BTINTEL_PCIE_MSIX_HW_INT_CAUSES_GP0. @@ -297,6 +303,8 @@ static int btintel_pcie_enable_bt(struct btintel_pcie_data *data) */ data->boot_stage_cache = 0x0; + btintel_pcie_set_persistence_mode(data); + /* Set MAC_INIT bit to start primary bootloader */ reg = btintel_pcie_rd_reg32(data, BTINTEL_PCIE_CSR_FUNC_CTRL_REG); reg &= ~(BTINTEL_PCIE_CSR_FUNC_CTRL_FUNC_INIT | @@ -1647,11 +1655,61 @@ static void btintel_pcie_remove(struct pci_dev *pdev) pci_set_drvdata(pdev, NULL); } +static int btintel_pcie_suspend(struct device *dev) +{ + struct btintel_pcie_data *data; + int err; + struct pci_dev *pdev = to_pci_dev(dev); + + data = pci_get_drvdata(pdev); + data->gp0_received = false; + btintel_pcie_wr_sleep_cntrl(data, BTINTEL_PCIE_STATE_D3_HOT); + err = wait_event_timeout(data->gp0_wait_q, data->gp0_received, + msecs_to_jiffies(BTINTEL_DEFAULT_INTR_TIMEOUT_MS)); + if (!err) { + bt_dev_err(data->hdev, "failed to receive gp0 interrupt for suspend in %lu msecs", + BTINTEL_DEFAULT_INTR_TIMEOUT_MS); + return -EBUSY; + } + return 0; +} + +static int btintel_pcie_resume(struct device *dev) +{ + struct btintel_pcie_data *data; + struct pci_dev *pdev = to_pci_dev(dev); + ktime_t calltime, delta, rettime; + unsigned long long duration; + int err; + + data = pci_get_drvdata(pdev); + data->gp0_received = false; + calltime = ktime_get(); + btintel_pcie_wr_sleep_cntrl(data, BTINTEL_PCIE_STATE_D0); + err = wait_event_timeout(data->gp0_wait_q, data->gp0_received, + msecs_to_jiffies(BTINTEL_DEFAULT_INTR_TIMEOUT_MS)); + if (!err) { + bt_dev_err(data->hdev, "failed to receive gp0 interrupt for resume in %lu msecs", + BTINTEL_DEFAULT_INTR_TIMEOUT_MS); + return -EBUSY; + } + rettime = ktime_get(); + delta = ktime_sub(rettime, calltime); + duration = (unsigned long long)ktime_to_ns(delta) >> 10; + bt_dev_info(data->hdev, "BT device resumed to D0 in %llu usecs", duration); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(btintel_pcie_pm_ops, btintel_pcie_suspend, + btintel_pcie_resume); + static struct pci_driver btintel_pcie_driver = { .name = KBUILD_MODNAME, .id_table = btintel_pcie_table, .probe = btintel_pcie_probe, .remove = btintel_pcie_remove, + .driver.pm = &btintel_pcie_pm_ops, }; module_pci_driver(btintel_pcie_driver); diff --git a/drivers/bluetooth/btintel_pcie.h b/drivers/bluetooth/btintel_pcie.h index f9aada0543c4..38d0c8ea2b6f 100644 --- a/drivers/bluetooth/btintel_pcie.h +++ b/drivers/bluetooth/btintel_pcie.h @@ -8,6 +8,7 @@ /* Control and Status Register(BTINTEL_PCIE_CSR) */ #define BTINTEL_PCIE_CSR_BASE (0x000) +#define BTINTEL_PCIE_CSR_HW_BOOT_CONFIG (BTINTEL_PCIE_CSR_BASE + 0x000) #define BTINTEL_PCIE_CSR_FUNC_CTRL_REG (BTINTEL_PCIE_CSR_BASE + 0x024) #define BTINTEL_PCIE_CSR_HW_REV_REG (BTINTEL_PCIE_CSR_BASE + 0x028) #define BTINTEL_PCIE_CSR_RF_ID_REG (BTINTEL_PCIE_CSR_BASE + 0x09C) @@ -48,6 +49,9 @@ #define BTINTEL_PCIE_CSR_MSIX_IVAR_BASE (BTINTEL_PCIE_CSR_MSIX_BASE + 0x0880) #define BTINTEL_PCIE_CSR_MSIX_IVAR(cause) (BTINTEL_PCIE_CSR_MSIX_IVAR_BASE + (cause)) +/* CSR HW BOOT CONFIG Register */ +#define BTINTEL_PCIE_CSR_HW_BOOT_CONFIG_KEEP_ON (BIT(31)) + /* Causes for the FH register interrupts */ enum msix_fh_int_causes { BTINTEL_PCIE_MSIX_FH_INT_CAUSES_0 = BIT(0), /* cause 0 */