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Mon, 15 Jul 2024 08:50:38 -0700 From: Liming Sun To: Subject: [PATCH v2 2/2] [SRU][J:linux-bluefield] mmc: dw_mmc-bluefield: Add support for eMMC HW reset Date: Mon, 15 Jul 2024 11:50:35 -0400 Message-ID: <20240715155035.289107-3-limings@nvidia.com> X-Mailer: git-send-email 2.30.1 In-Reply-To: <08b0cb030e8692b3550b72e0c9bd9273f8832a5c.1720642165.git.limings@nvidia.com> References: <08b0cb030e8692b3550b72e0c9bd9273f8832a5c.1720642165.git.limings@nvidia.com> MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF00002320:EE_|IA0PR12MB8932:EE_ X-MS-Office365-Filtering-Correlation-Id: 7105e119-fc54-4f6f-72df-08dca4e5e7fb X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|82310400026|1800799024|36860700013|376014; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.160; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc6edge1.nvidia.com; CAT:NONE; SFS:(13230040)(82310400026)(1800799024)(36860700013)(376014); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Jul 2024 15:50:52.6093 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 7105e119-fc54-4f6f-72df-08dca4e5e7fb X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.117.160]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF00002320.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB8932 Received-SPF: softfail client-ip=40.107.94.51; envelope-from=limings@nvidia.com; helo=NAM10-MW2-obe.outbound.protection.outlook.com X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.20 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: "kernel-team" BugLink: https://bugs.launchpad.net/bugs/2072675 The eMMC RST_N register is implemented as secure register on the BlueField SoC and controlled by TF-A. This commit sends an SMC call to TF-A for the eMMC HW reset. Reviewed-by: David Thompson Signed-off-by: Liming Sun Link: https://lore.kernel.org/r/2c459196c6867e325f9386ec0559efea464cfdd6.1718213918.git.limings@nvidia.com Signed-off-by: Ulf Hansson (cherry picked from commit c17aecf85800ac91ec67fd7134107526a4bab3b0 mmc) Signed-off-by: Liming Sun --- drivers/mmc/host/dw_mmc-bluefield.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/dw_mmc-bluefield.c b/drivers/mmc/host/dw_mmc-bluefield.c index 10baf122bc15..3cf526ab0387 100644 --- a/drivers/mmc/host/dw_mmc-bluefield.c +++ b/drivers/mmc/host/dw_mmc-bluefield.c @@ -3,6 +3,7 @@ * Copyright (C) 2018 Mellanox Technologies. */ +#include #include #include #include @@ -20,6 +21,9 @@ #define BLUEFIELD_UHS_REG_EXT_SAMPLE 2 #define BLUEFIELD_UHS_REG_EXT_DRIVE 4 +/* SMC call for RST_N */ +#define BLUEFIELD_SMC_SET_EMMC_RST_N 0x82000007 + static void dw_mci_bluefield_set_ios(struct dw_mci *host, struct mmc_ios *ios) { u32 reg; @@ -34,8 +38,20 @@ static void dw_mci_bluefield_set_ios(struct dw_mci *host, struct mmc_ios *ios) mci_writel(host, UHS_REG_EXT, reg); } +static void dw_mci_bluefield_hw_reset(struct dw_mci *host) +{ + struct arm_smccc_res res = { 0 }; + + arm_smccc_smc(BLUEFIELD_SMC_SET_EMMC_RST_N, 0, 0, 0, 0, 0, 0, 0, + &res); + + if (res.a0) + pr_err("RST_N failed.\n"); +} + static const struct dw_mci_drv_data bluefield_drv_data = { - .set_ios = dw_mci_bluefield_set_ios + .set_ios = dw_mci_bluefield_set_ios, + .hw_reset = dw_mci_bluefield_hw_reset }; static const struct of_device_id dw_mci_bluefield_match[] = {