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GET /api/patches/807466/?format=api
{ "id": 807466, "url": "http://patchwork.ozlabs.org/api/patches/807466/?format=api", "web_url": "http://patchwork.ozlabs.org/project/uboot/patch/1504081806-16877-1-git-send-email-suresh.gupta@nxp.com/", "project": { "id": 18, "url": "http://patchwork.ozlabs.org/api/projects/18/?format=api", "name": "U-Boot", "link_name": "uboot", "list_id": "u-boot.lists.denx.de", "list_email": "u-boot@lists.denx.de", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<1504081806-16877-1-git-send-email-suresh.gupta@nxp.com>", "list_archive_url": null, "date": "2017-08-30T08:30:06", "name": "[U-Boot,v3] spi: fsl_qspi: Add controller busy check before new spi operation", "commit_ref": null, "pull_url": null, "state": "superseded", "archived": false, "hash": "078c604290cc9585519a785268272b228ff41a32", "submitter": { "id": 70239, "url": "http://patchwork.ozlabs.org/api/people/70239/?format=api", "name": "Suresh Gupta", "email": "suresh.gupta@nxp.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/uboot/patch/1504081806-16877-1-git-send-email-suresh.gupta@nxp.com/mbox/", "series": [ { "id": 549, "url": "http://patchwork.ozlabs.org/api/series/549/?format=api", "web_url": "http://patchwork.ozlabs.org/project/uboot/list/?series=549", "date": "2017-08-30T08:30:06", "name": "[U-Boot,v3] spi: fsl_qspi: Add controller busy check before new spi operation", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/549/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/807466/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/807466/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<u-boot-bounces@lists.denx.de>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@bilbo.ozlabs.org", "Authentication-Results": [ "ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=lists.denx.de\n\t(client-ip=81.169.180.215; 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Wed, 30 Aug 2017 01:29:26 -0700" ], "X-Spam-Checker-Version": "SpamAssassin 3.4.0 (2014-02-07) on lists.denx.de", "X-Spam-Level": "", "X-Spam-Status": "No, score=-0.0 required=5.0 tests=BAD_ENC_HEADER,\n\tRCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H4, RCVD_IN_MSPIKE_WL,\n\tSPF_HELO_PASS\n\tautolearn=unavailable autolearn_force=no version=3.4.0", "Received-SPF": "Fail (protection.outlook.com: domain of nxp.com does not\n\tdesignate 192.88.168.50 as permitted sender)\n\treceiver=protection.outlook.com; \n\tclient-ip=192.88.168.50; helo=tx30smr01.am.freescale.net;", "From": "Suresh Gupta <suresh.gupta@nxp.com>", "To": "<u-boot@lists.denx.de>", "Date": "Wed, 30 Aug 2017 14:00:06 +0530", "Message-ID": "<1504081806-16877-1-git-send-email-suresh.gupta@nxp.com>", "X-Mailer": "git-send-email 1.9.3", "X-EOPAttributedMessage": "0", "X-Matching-Connectors": "131485553706773056;\n\t(91ab9b29-cfa4-454e-5278-08d120cd25b8); ()", "X-Forefront-Antispam-Report": "CIP:192.88.168.50; IPV:NLI; CTRY:US; EFV:NLI;\n\tSFV:NSPM;\n\tSFS:(10009020)(6009001)(336005)(39380400002)(39860400002)(2980300002)(1109001)(1110001)(339900001)(199003)(189002)(551934003)(575784001)(86362001)(4326008)(50986999)(8676002)(110136004)(106466001)(54906002)(2351001)(97736004)(33646002)(8936002)(81156014)(81166006)(105606002)(50226002)(5660300001)(48376002)(50466002)(36756003)(356003)(39060400002)(305945005)(5003940100001)(47776003)(189998001)(6666003)(6916009)(8656003)(53936002)(498600001)(2906002)(68736007)(104016004)(77096006)(85426001)(626005);\n\tDIR:OUT; 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BCL:0; PCL:0;\n\tRULEID:(300000500095)(300135000095)(300000501095)(300135300095)(22001)(300000502095)(300135100095)(300000503095)(300135400095)(2017052603199)(201703131430075)(201703131517081)(300000504095)(300135200095)(300000505095)(300135600095)(300000506095)(300135500095);\n\tSRVR:CY1PR03MB2267; ", "X-MS-TrafficTypeDiagnostic": "CY1PR03MB2267:", "X-Exchange-Antispam-Report-Test": "UriScan:(185117386973197)(788757137089);", "X-Microsoft-Antispam-PRVS": "<CY1PR03MB2267DA1279A4C54C803A1772809C0@CY1PR03MB2267.namprd03.prod.outlook.com>", "X-Exchange-Antispam-Report-CFA-Test": "BCL:0; PCL:0;\n\tRULEID:(100000700101)(100105000095)(100000701101)(100105300095)(100000702101)(100105100095)(6095135)(601004)(2401047)(13018025)(13016025)(8121501046)(5005006)(100000703101)(100105400095)(3002001)(93006095)(93001095)(10201501046)(6055026)(6096035)(20161123563025)(20161123565025)(20161123559100)(201703131430075)(201703131441075)(201703131448075)(201703131433075)(201703161259150)(20161123561025)(20161123556025)(201708071742011)(100000704101)(100105200095)(100000705101)(100105500095);\n\tSRVR:CY1PR03MB2267; BCL:0; PCL:0;\n\tRULEID:(100000800101)(100110000095)(100000801101)(100110300095)(100000802101)(100110100095)(100000803101)(100110400095)(400006)(100000804101)(100110200095)(100000805101)(100110500095);\n\tSRVR:CY1PR03MB2267; ", "X-Forefront-PRVS": "041517DFAB", "SpamDiagnosticOutput": "1:99", "SpamDiagnosticMetadata": "NSPM", "X-MS-Exchange-CrossTenant-OriginalArrivalTime": "30 Aug 2017 08:29:28.9769\n\t(UTC)", "X-MS-Exchange-CrossTenant-Id": "5afe0b00-7697-4969-b663-5eab37d5f47e", "X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp": "TenantId=5afe0b00-7697-4969-b663-5eab37d5f47e;\n\tIp=[192.88.168.50]; \n\tHelo=[tx30smr01.am.freescale.net]", "X-MS-Exchange-CrossTenant-FromEntityHeader": "HybridOnPrem", "X-MS-Exchange-Transport-CrossTenantHeadersStamped": "CY1PR03MB2267", "Cc": "Suresh Gupta <suresh.gupta@nxp.com>", "Subject": "[U-Boot] [PATCH v3] spi: fsl_qspi: Add controller busy check before\n\tnew spi operation", "X-BeenThere": "u-boot@lists.denx.de", "X-Mailman-Version": "2.1.18", "Precedence": "list", "List-Id": "U-Boot discussion <u-boot.lists.denx.de>", "List-Unsubscribe": "<https://lists.denx.de/options/u-boot>,\n\t<mailto:u-boot-request@lists.denx.de?subject=unsubscribe>", "List-Archive": "<http://lists.denx.de/pipermail/u-boot/>", "List-Post": "<mailto:u-boot@lists.denx.de>", "List-Help": "<mailto:u-boot-request@lists.denx.de?subject=help>", "List-Subscribe": "<https://lists.denx.de/listinfo/u-boot>,\n\t<mailto:u-boot-request@lists.denx.de?subject=subscribe>", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "base64", "Errors-To": "u-boot-bounces@lists.denx.de", "Sender": "\"U-Boot\" <u-boot-bounces@lists.denx.de>" }, "content": "It is recommended to check either controller is free to take\nnew spi action. The IP_ACC and AHB_ACC bits indicates that\nthe controller is busy in IP or AHB mode respectively.\nAnd the BUSY bit indicates that controller is currently\nbusy handling a transaction to an external flash device\n\nSigned-off-by: Suresh Gupta <suresh.gupta@nxp.com>\n---\nChnages in v3:\n - replace printf to debug\n - return whatever return from wait_for_bit, before it was -EBUSY\n\nChanges in v2:\n\n - Add wait_for_bit instead of while\n - move the busy check code to fsl_qspi_claim_bus form qspi_xfer\n\n\n drivers/spi/fsl_qspi.c | 28 +++++++++++++++++++++++++++-\n drivers/spi/fsl_qspi.h | 4 ++++\n 2 files changed, 31 insertions(+), 1 deletion(-)", "diff": "diff --git a/drivers/spi/fsl_qspi.c b/drivers/spi/fsl_qspi.c\nindex 1dfa89a..8f0f29e 100644\n--- a/drivers/spi/fsl_qspi.c\n+++ b/drivers/spi/fsl_qspi.c\n@@ -14,6 +14,7 @@\n #include <dm.h>\n #include <errno.h>\n #include <watchdog.h>\n+#include <wait_bit.h>\n #include \"fsl_qspi.h\"\n \n DECLARE_GLOBAL_DATA_PTR;\n@@ -991,7 +992,7 @@ static int fsl_qspi_probe(struct udevice *bus)\n \tstruct fsl_qspi_platdata *plat = dev_get_platdata(bus);\n \tstruct fsl_qspi_priv *priv = dev_get_priv(bus);\n \tstruct dm_spi_bus *dm_spi_bus;\n-\tint i;\n+\tint i, ret;\n \n \tdm_spi_bus = bus->uclass_priv;\n \n@@ -1011,6 +1012,18 @@ static int fsl_qspi_probe(struct udevice *bus)\n \tpriv->flash_num = plat->flash_num;\n \tpriv->num_chipselect = plat->num_chipselect;\n \n+\t/* make sure controller is not busy anywhere */\n+\tret = wait_for_bit(__func__, &priv->regs->sr,\n+\t\t\t QSPI_SR_BUSY_MASK |\n+\t\t\t QSPI_SR_AHB_ACC_MASK |\n+\t\t\t QSPI_SR_IP_ACC_MASK,\n+\t\t\t false, 1000, false);\n+\n+\tif (ret) {\n+\t\tdebug(\"ERROR : The controller is busy\\n\");\n+\t\treturn ret;\n+\t}\n+\n \tmcr_val = qspi_read32(priv->flags, &priv->regs->mcr);\n \tqspi_write32(priv->flags, &priv->regs->mcr,\n \t\t QSPI_MCR_RESERVED_MASK | QSPI_MCR_MDIS_MASK |\n@@ -1156,10 +1169,23 @@ static int fsl_qspi_claim_bus(struct udevice *dev)\n \tstruct fsl_qspi_priv *priv;\n \tstruct udevice *bus;\n \tstruct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev);\n+\tint ret;\n \n \tbus = dev->parent;\n \tpriv = dev_get_priv(bus);\n \n+\t/* make sure controller is not busy anywhere */\n+\tret = wait_for_bit(__func__, &priv->regs->sr,\n+\t\t\t QSPI_SR_BUSY_MASK |\n+\t\t\t QSPI_SR_AHB_ACC_MASK |\n+\t\t\t QSPI_SR_IP_ACC_MASK,\n+\t\t\t false, 1000, false);\n+\n+\tif (ret) {\n+\t\tdebug(\"ERROR : The controller is busy\\n\");\n+\t\treturn ret;\n+\t}\n+\n \tpriv->cur_amba_base = priv->amba_base[slave_plat->cs];\n \n \tqspi_module_disable(priv, 0);\ndiff --git a/drivers/spi/fsl_qspi.h b/drivers/spi/fsl_qspi.h\nindex 6cb3610..e468eb2 100644\n--- a/drivers/spi/fsl_qspi.h\n+++ b/drivers/spi/fsl_qspi.h\n@@ -105,6 +105,10 @@ struct fsl_qspi_regs {\n #define QSPI_RBCT_RXBRD_SHIFT\t\t8\n #define QSPI_RBCT_RXBRD_USEIPS\t\t(1 << QSPI_RBCT_RXBRD_SHIFT)\n \n+#define QSPI_SR_AHB_ACC_SHIFT\t\t2\n+#define QSPI_SR_AHB_ACC_MASK\t\t(1 << QSPI_SR_AHB_ACC_SHIFT)\n+#define QSPI_SR_IP_ACC_SHIFT\t\t1\n+#define QSPI_SR_IP_ACC_MASK\t\t(1 << QSPI_SR_IP_ACC_SHIFT)\n #define QSPI_SR_BUSY_SHIFT\t\t0\n #define QSPI_SR_BUSY_MASK\t\t(1 << QSPI_SR_BUSY_SHIFT)\n \n", "prefixes": [ "U-Boot", "v3" ] }