From patchwork Thu Nov 14 22:25:18 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kars de Jong X-Patchwork-Id: 11244539 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BDFCB14BC for ; Thu, 14 Nov 2019 22:25:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A83F320727 for ; Thu, 14 Nov 2019 22:25:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727032AbfKNWZs (ORCPT ); Thu, 14 Nov 2019 17:25:48 -0500 Received: from mail-wr1-f67.google.com ([209.85.221.67]:39889 "EHLO mail-wr1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726319AbfKNWZs (ORCPT ); Thu, 14 Nov 2019 17:25:48 -0500 Received: by mail-wr1-f67.google.com with SMTP id l7so8662680wrp.6; Thu, 14 Nov 2019 14:25:46 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=LCRmSHXQ6fd0/08i2+2axIrSb/OOjGhvuV19oUa9iAk=; b=opx6b3qqK0zewsWJaPJO/a3lDUQ6/DlGffntdGhDOsofHzJnMXqtVFUcdOGd3gjcwO NiMKzFpALgfcw/RkLjRHyW0zvPUxLEOIbkwKGU6KtnveYiTPUkJQCeB0YpVLCtCKTBEE Nz4QM+MrmwVlwRy9iJtfd0srTYIYdsFoam+H2vf0+eU1djxLAp4zLfevr9GNfXQfhGJN s0B6pD64TN+BY6U/EKByVl6d2pUz4XUMKV7bvzlniN/DEcmjyjgWt4zdzo09phHCexsB /T0eAgrXZ+urJ2TxYc5KD6jpv5PSz6ZvHI+jDzAjoCOC0r9FnI1f4kwhXTRwYUyCdtuH ANOQ== X-Gm-Message-State: APjAAAWW6iwqrYYSUuzjNYFIi6ssYsTuhnd0DoWhovWIdmgzWzof6w3c 4YsaWW1Y06upcuF5bdCEBRFqLavJ018= X-Google-Smtp-Source: APXvYqzG1mn2xhVtpRaUHOvWvGbxfIsG6AXOJPqdrZyPmiFmiV0yOIa2vy6eDiV47zI7W0JQPCOasQ== X-Received: by 2002:adf:c449:: with SMTP id a9mr1132082wrg.240.1573770345172; Thu, 14 Nov 2019 14:25:45 -0800 (PST) Received: from localhost.localdomain (2001-1c06-18c6-e000-0cda-4949-05a4-23b4.cable.dynamic.v6.ziggo.nl. [2001:1c06:18c6:e000:cda:4949:5a4:23b4]) by smtp.gmail.com with ESMTPSA id d11sm8814903wrn.28.2019.11.14.14.25.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 Nov 2019 14:25:44 -0800 (PST) From: Kars de Jong To: "James E.J. Bottomley" , "Martin K. Petersen" , Hannes Reinecke Cc: linux-scsi@vger.kernel.org, linux-m68k@vger.kernel.org, schmitzmic@gmail.com, fthain@telegraphics.com.au, Kars de Jong Subject: [PATCH v3 2/2] esp_scsi: Add support for FSC chip Date: Thu, 14 Nov 2019 23:25:18 +0100 Message-Id: <20191114222518.2441-3-jongk@linux-m68k.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191114222518.2441-1-jongk@linux-m68k.org> References: <20191114215956.21767-1-jongk@linux-m68k.org> <20191114222518.2441-1-jongk@linux-m68k.org> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The FSC (NCR53CF9x-2 / SYM53CF9x-2) has a different family code than QLogic or Emulex parts. This caused it to be detected as a FAS100A. Unforunately, this meant the configuration of the CONFIG3 register was incorrect. This causes data transfer issues with FAST-SCSI targets. The FSC also has the CONFIG4 register. It can be used to enable a feature called Active Negation which should always be enabled according to the data manual. Signed-off-by: Kars de Jong Reviewed-by: Finn Thain --- drivers/scsi/esp_scsi.c | 19 ++++++++++++------- drivers/scsi/esp_scsi.h | 24 ++++++++++++++++-------- 2 files changed, 28 insertions(+), 15 deletions(-) diff --git a/drivers/scsi/esp_scsi.c b/drivers/scsi/esp_scsi.c index 4fc3eee3138b..e887ea3e514a 100644 --- a/drivers/scsi/esp_scsi.c +++ b/drivers/scsi/esp_scsi.c @@ -243,7 +243,7 @@ static void esp_set_all_config3(struct esp *esp, u8 val) /* Reset the ESP chip, _not_ the SCSI bus. */ static void esp_reset_esp(struct esp *esp) { - u8 family_code, version; + u8 family_code; /* Now reset the ESP chip */ scsi_esp_cmd(esp, ESP_CMD_RC); @@ -257,13 +257,16 @@ static void esp_reset_esp(struct esp *esp) */ esp->max_period = ((35 * esp->ccycle) / 1000); if (esp->rev == FAST) { - version = esp_read8(ESP_UID); - family_code = (version & 0xf8) >> 3; - if (family_code == 0x02) + family_code = ESP_FAMILY(esp_read8(ESP_UID)); + if (family_code == ESP_UID_F236) esp->rev = FAS236; - else if (family_code == 0x0a) + else if (family_code == ESP_UID_HME) esp->rev = FASHME; /* Version is usually '5'. */ - else + else if (family_code == ESP_UID_FSC) { + esp->rev = FSC; + /* Enable Active Negation */ + esp_write8(ESP_CONFIG4_RADE, ESP_CFG4); + } else esp->rev = FAS100A; esp->min_period = ((4 * esp->ccycle) / 1000); } else { @@ -308,7 +311,8 @@ static void esp_reset_esp(struct esp *esp) case FAS236: case PCSCSI: - /* Fast 236, AM53c974 or HME */ + case FSC: + /* Fast 236, AM53c974, FSC or HME */ esp_write8(esp->config2, ESP_CFG2); if (esp->rev == FASHME) { u8 cfg3 = esp->target[0].esp_config3; @@ -2374,6 +2378,7 @@ static const char *esp_chip_names[] = { "ESP236", "FAS236", "AM53C974", + "FSC", "FAS100A", "FAST", "FASHME", diff --git a/drivers/scsi/esp_scsi.h b/drivers/scsi/esp_scsi.h index f764d64e1f25..a673dec1b8a1 100644 --- a/drivers/scsi/esp_scsi.h +++ b/drivers/scsi/esp_scsi.h @@ -78,12 +78,14 @@ #define ESP_CONFIG3_IMS 0x80 /* ID msg chk'ng (esp/fas236) */ #define ESP_CONFIG3_OBPUSH 0x80 /* Push odd-byte to dma (hme) */ -/* ESP config register 4 read-write, found only on am53c974 chips */ -#define ESP_CONFIG4_RADE 0x04 /* Active negation */ -#define ESP_CONFIG4_RAE 0x08 /* Active negation on REQ and ACK */ -#define ESP_CONFIG4_PWD 0x20 /* Reduced power feature */ -#define ESP_CONFIG4_GE0 0x40 /* Glitch eater bit 0 */ -#define ESP_CONFIG4_GE1 0x80 /* Glitch eater bit 1 */ +/* ESP config register 4 read-write, found on am53c974 and FSC chips */ +#define ESP_CONFIG4_BBTE 0x01 /* Back-to-back transfers (fsc) */ +#define ESP_CONGIG4_TEST 0x02 /* Transfer counter test mode (fsc) */ +#define ESP_CONFIG4_RADE 0x04 /* Active negation (am53c974/fsc) */ +#define ESP_CONFIG4_RAE 0x08 /* Act. negation REQ/ACK (am53c974) */ +#define ESP_CONFIG4_PWD 0x20 /* Reduced power feature (am53c974) */ +#define ESP_CONFIG4_GE0 0x40 /* Glitch eater bit 0 (am53c974) */ +#define ESP_CONFIG4_GE1 0x80 /* Glitch eater bit 1 (am53c974) */ #define ESP_CONFIG_GE_12NS (0) #define ESP_CONFIG_GE_25NS (ESP_CONFIG_GE1) @@ -209,10 +211,15 @@ #define ESP_TEST_TS 0x04 /* Tristate test mode */ /* ESP unique ID register read-only, found on fas236+fas100a only */ +#define ESP_UID_FAM 0xf8 /* ESP family bitmask */ + +#define ESP_FAMILY(uid) (((uid) & ESP_UID_FAM) >> 3) + +/* Values for the ESP family bits */ #define ESP_UID_F100A 0x00 /* ESP FAS100A */ #define ESP_UID_F236 0x02 /* ESP FAS236 */ -#define ESP_UID_REV 0x07 /* ESP revision */ -#define ESP_UID_FAM 0xf8 /* ESP family */ +#define ESP_UID_HME 0x0a /* FAS HME */ +#define ESP_UID_FSC 0x14 /* NCR/Symbios Logic FSC */ /* ESP fifo flags register read-only */ /* Note that the following implies a 16 byte FIFO on the ESP. */ @@ -264,6 +271,7 @@ enum esp_rev { ESP236, FAS236, PCSCSI, /* AM53c974 */ + FSC, /* NCR/Symbios Logic FSC */ FAS100A, FAST, FASHME,