From 2086faae3c55a652cfbd369e18ecdb703aacc493 Mon Sep 17 00:00:00 2001 From: Kars de Jong Date: Tue, 19 Nov 2019 21:20:20 +0100 Subject: scsi: esp_scsi: Correct ordering of PCSCSI definition in esp_rev enum The order of the definitions in the esp_rev enum is important. The values are used in comparisons for chip features. Add a comment to the enum explaining this. Also, the actual values for the enum fields are irrelevant, so remove the explicit values (suggested by Geert Uytterhoeven). This makes adding a new field in the middle of the enum easier. Finally, move the PCSCSI definition to the right place in the enum. In its previous location, at the end of the enum, the wrong values are written to the CONFIG3 register when used with FAST-SCSI targets. Link: https://lore.kernel.org/r/20191119202021.28720-2-jongk@linux-m68k.org Signed-off-by: Kars de Jong Signed-off-by: Martin K. Petersen --- drivers/scsi/esp_scsi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/scsi/esp_scsi.c') diff --git a/drivers/scsi/esp_scsi.c b/drivers/scsi/esp_scsi.c index bb88995a12c7..4fc3eee3138b 100644 --- a/drivers/scsi/esp_scsi.c +++ b/drivers/scsi/esp_scsi.c @@ -2373,10 +2373,10 @@ static const char *esp_chip_names[] = { "ESP100A", "ESP236", "FAS236", + "AM53C974", "FAS100A", "FAST", "FASHME", - "AM53C974", }; static struct scsi_transport_template *esp_transport_template; -- cgit v1.2.3 From bd40726153c646ed28f830e22a27f5e831b77017 Mon Sep 17 00:00:00 2001 From: Kars de Jong Date: Tue, 19 Nov 2019 21:20:21 +0100 Subject: scsi: esp_scsi: Add support for FSC chip 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. Link: https://lore.kernel.org/r/20191119202021.28720-3-jongk@linux-m68k.org Reviewed-by: Finn Thain Signed-off-by: Kars de Jong Signed-off-by: Martin K. Petersen --- drivers/scsi/esp_scsi.c | 20 ++++++++++++-------- drivers/scsi/esp_scsi.h | 24 ++++++++++++++++-------- 2 files changed, 28 insertions(+), 16 deletions(-) (limited to 'drivers/scsi/esp_scsi.c') diff --git a/drivers/scsi/esp_scsi.c b/drivers/scsi/esp_scsi.c index 4fc3eee3138b..89afa31e33cb 100644 --- a/drivers/scsi/esp_scsi.c +++ b/drivers/scsi/esp_scsi.c @@ -243,8 +243,6 @@ 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; - /* Now reset the ESP chip */ scsi_esp_cmd(esp, ESP_CMD_RC); scsi_esp_cmd(esp, ESP_CMD_NULL | ESP_CMD_DMA); @@ -257,14 +255,19 @@ 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) + u8 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 { esp->min_period = ((5 * esp->ccycle) / 1000); @@ -308,7 +311,7 @@ static void esp_reset_esp(struct esp *esp) case FAS236: case PCSCSI: - /* Fast 236, AM53c974 or HME */ + case FSC: esp_write8(esp->config2, ESP_CFG2); if (esp->rev == FASHME) { u8 cfg3 = esp->target[0].esp_config3; @@ -2374,6 +2377,7 @@ static const char *esp_chip_names[] = { "ESP236", "FAS236", "AM53C974", + "53CF9x-2", "FAS100A", "FAST", "FASHME", diff --git a/drivers/scsi/esp_scsi.h b/drivers/scsi/esp_scsi.h index f764d64e1f25..446a3d18c022 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 */ +#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 53CF9x-2 */ /* 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 53CF9x-2 */ FAS100A, FAST, FASHME, -- cgit v1.2.3