diff options
author | Kars de Jong <jongk@linux-m68k.org> | 2019-11-19 21:20:21 +0100 |
---|---|---|
committer | Martin K. Petersen <martin.petersen@oracle.com> | 2019-12-19 22:08:51 -0500 |
commit | bd40726153c646ed28f830e22a27f5e831b77017 (patch) | |
tree | 6b9689e3a29d6e8272852d2a98b79a7339f2cde6 | |
parent | 2086faae3c55a652cfbd369e18ecdb703aacc493 (diff) | |
download | linux-bd40726153c646ed28f830e22a27f5e831b77017.tar.gz linux-bd40726153c646ed28f830e22a27f5e831b77017.tar.bz2 linux-bd40726153c646ed28f830e22a27f5e831b77017.zip |
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 <fthain@telegraphics.com.au>
Signed-off-by: Kars de Jong <jongk@linux-m68k.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
-rw-r--r-- | drivers/scsi/esp_scsi.c | 20 | ||||
-rw-r--r-- | drivers/scsi/esp_scsi.h | 24 |
2 files changed, 28 insertions, 16 deletions
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, |