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Wed, 10 Jul 2024 13:26:47 -0700 From: Liming Sun To: Subject: [PATCH v1 2/2] [SRU][J:linux-bluefield] mmc: dw_mmc-bluefield: Add support for eMMC HW reset Date: Wed, 10 Jul 2024 16:26:45 -0400 Message-ID: X-Mailer: git-send-email 2.30.1 In-Reply-To: References: MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN3PEPF0000B06A:EE_|SA3PR12MB7923:EE_ X-MS-Office365-Filtering-Correlation-Id: 950c1969-d444-4adc-cdff-08dca11eaabb X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|376014|36860700013|82310400026|1800799024; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.232; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc7edge1.nvidia.com; CAT:NONE; SFS:(13230040)(376014)(36860700013)(82310400026)(1800799024); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Jul 2024 20:27:06.3262 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 950c1969-d444-4adc-cdff-08dca11eaabb X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.118.232]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN3PEPF0000B06A.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA3PR12MB7923 Received-SPF: softfail client-ip=40.107.220.87; envelope-from=limings@nvidia.com; helo=NAM11-CO1-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) --- 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[] = {