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scsi: fdomain: Resurrect driver - Core 

Future Domain TMC-16xx/TMC-3260 SCSI driver.

This is the core driver, common for PCI, ISA and PCMCIA cards.

Signed-off-by: Ondrej Zary <linux@zary.sk>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Ondrej Zary 2019-05-14 19:23:07 +02:00 committed by Martin K. Petersen
parent 9a14f9b1be
commit ebeb466531
4 changed files with 644 additions and 0 deletions
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4
drivers/scsi/Kconfig
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@ -641,6 +641,10 @@ config SCSI_DMX3191D
To compile this driver as a module, choose M here: the
module will be called dmx3191d.
config SCSI_FDOMAIN
tristate
depends on SCSI
config SCSI_GDTH
tristate "Intel/ICP (former GDT SCSI Disk Array) RAID Controller support"
depends on PCI && SCSI

1
drivers/scsi/Makefile
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@ -76,6 +76,7 @@ obj-$(CONFIG_SCSI_AIC94XX) += aic94xx/
obj-$(CONFIG_SCSI_PM8001) += pm8001/
obj-$(CONFIG_SCSI_ISCI) += isci/
obj-$(CONFIG_SCSI_IPS) += ips.o
obj-$(CONFIG_SCSI_FDOMAIN) += fdomain.o
obj-$(CONFIG_SCSI_GENERIC_NCR5380) += g_NCR5380.o
obj-$(CONFIG_SCSI_QLOGIC_FAS) += qlogicfas408.o qlogicfas.o
obj-$(CONFIG_PCMCIA_QLOGIC) += qlogicfas408.o

586
drivers/scsi/fdomain.c Normal file
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@ -0,0 +1,586 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Driver for Future Domain TMC-16x0 and TMC-3260 SCSI host adapters
* Copyright 2019 Ondrej Zary
*
* Original driver by
* Rickard E. Faith, faith@cs.unc.edu
*
* Future Domain BIOS versions supported for autodetect:
* 2.0, 3.0, 3.2, 3.4 (1.0), 3.5 (2.0), 3.6, 3.61
* Chips supported:
* TMC-1800, TMC-18C50, TMC-18C30, TMC-36C70
* Boards supported:
* Future Domain TMC-1650, TMC-1660, TMC-1670, TMC-1680, TMC-1610M/MER/MEX
* Future Domain TMC-3260 (PCI)
* Quantum ISA-200S, ISA-250MG
* Adaptec AHA-2920A (PCI) [BUT *NOT* AHA-2920C -- use aic7xxx instead]
* IBM ?
*
* NOTE:
*
* The Adaptec AHA-2920C has an Adaptec AIC-7850 chip on it.
* Use the aic7xxx driver for this board.
*
* The Adaptec AHA-2920A has a Future Domain chip on it, so this is the right
* driver for that card. Unfortunately, the boxes will probably just say
* "2920", so you'll have to look on the card for a Future Domain logo, or a
* letter after the 2920.
*
* If you have a TMC-8xx or TMC-9xx board, then this is not the driver for
* your board.
*
* DESCRIPTION:
*
* This is the Linux low-level SCSI driver for Future Domain TMC-1660/1680
* TMC-1650/1670, and TMC-3260 SCSI host adapters. The 1650 and 1670 have a
* 25-pin external connector, whereas the 1660 and 1680 have a SCSI-2 50-pin
* high-density external connector. The 1670 and 1680 have floppy disk
* controllers built in. The TMC-3260 is a PCI bus card.
*
* Future Domain's older boards are based on the TMC-1800 chip, and this
* driver was originally written for a TMC-1680 board with the TMC-1800 chip.
* More recently, boards are being produced with the TMC-18C50 and TMC-18C30
* chips.
*
* Please note that the drive ordering that Future Domain implemented in BIOS
* versions 3.4 and 3.5 is the opposite of the order (currently) used by the
* rest of the SCSI industry.
*
*
* REFERENCES USED:
*
* "TMC-1800 SCSI Chip Specification (FDC-1800T)", Future Domain Corporation,
* 1990.
*
* "Technical Reference Manual: 18C50 SCSI Host Adapter Chip", Future Domain
* Corporation, January 1992.
*
* "LXT SCSI Products: Specifications and OEM Technical Manual (Revision
* B/September 1991)", Maxtor Corporation, 1991.
*
* "7213S product Manual (Revision P3)", Maxtor Corporation, 1992.
*
* "Draft Proposed American National Standard: Small Computer System
* Interface - 2 (SCSI-2)", Global Engineering Documents. (X3T9.2/86-109,
* revision 10h, October 17, 1991)
*
* Private communications, Drew Eckhardt (drew@cs.colorado.edu) and Eric
* Youngdale (ericy@cais.com), 1992.
*
* Private communication, Tuong Le (Future Domain Engineering department),
* 1994. (Disk geometry computations for Future Domain BIOS version 3.4, and
* TMC-18C30 detection.)
*
* Hogan, Thom. The Programmer's PC Sourcebook. Microsoft Press, 1988. Page
* 60 (2.39: Disk Partition Table Layout).
*
* "18C30 Technical Reference Manual", Future Domain Corporation, 1993, page
* 6-1.
*/
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/pci.h>
#include <linux/workqueue.h>
#include <scsi/scsicam.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include "fdomain.h"
/*
* FIFO_COUNT: The host adapter has an 8K cache (host adapters based on the
* 18C30 chip have a 2k cache). When this many 512 byte blocks are filled by
* the SCSI device, an interrupt will be raised. Therefore, this could be as
* low as 0, or as high as 16. Note, however, that values which are too high
* or too low seem to prevent any interrupts from occurring, and thereby lock
* up the machine.
*/
#define FIFO_COUNT 2 /* Number of 512 byte blocks before INTR */
#define PARITY_MASK 0x08 /* Parity enabled, 0x00 = disabled */
enum chip_type {
unknown = 0x00,
tmc1800 = 0x01,
tmc18c50 = 0x02,
tmc18c30 = 0x03,
};
struct fdomain {
int base;
struct scsi_cmnd *cur_cmd;
enum chip_type chip;
struct work_struct work;
};
static inline void fdomain_make_bus_idle(struct fdomain *fd)
{
outb(0, fd->base + SCSI_Cntl);
outb(0, fd->base + SCSI_Mode_Cntl);
if (fd->chip == tmc18c50 || fd->chip == tmc18c30)
/* Clear forced intr. */
outb(0x21 | PARITY_MASK, fd->base + TMC_Cntl);
else
outb(0x01 | PARITY_MASK, fd->base + TMC_Cntl);
}
static enum chip_type fdomain_identify(int port)
{
u16 id = inb(port + LSB_ID_Code) | inb(port + MSB_ID_Code) << 8;
switch (id) {
case 0x6127:
return tmc1800;
case 0x60e9: /* 18c50 or 18c30 */
break;
default:
return unknown;
}
/* Try to toggle 32-bit mode. This only works on an 18c30 chip. */
outb(0x80, port + IO_Control);
if ((inb(port + Configuration2) & 0x80) == 0x80) {
outb(0x00, port + IO_Control);
if ((inb(port + Configuration2) & 0x80) == 0x00)
return tmc18c30;
}
/* If that failed, we are an 18c50. */
return tmc18c50;
}
static int fdomain_test_loopback(int base)
{
int i;
for (i = 0; i < 255; i++) {
outb(i, base + Write_Loopback);
if (inb(base + Read_Loopback) != i)
return 1;
}
return 0;
}
static void fdomain_reset(int base)
{
outb(1, base + SCSI_Cntl);
mdelay(20);
outb(0, base + SCSI_Cntl);
mdelay(1150);
outb(0, base + SCSI_Mode_Cntl);
outb(PARITY_MASK, base + TMC_Cntl);
}
static int fdomain_select(struct Scsi_Host *sh, int target)
{
int status;
unsigned long timeout;
struct fdomain *fd = shost_priv(sh);
outb(0x82, fd->base + SCSI_Cntl); /* Bus Enable + Select */
outb(BIT(sh->this_id) | BIT(target), fd->base + SCSI_Data_NoACK);
/* Stop arbitration and enable parity */
outb(PARITY_MASK, fd->base + TMC_Cntl);
timeout = 350; /* 350 msec */
do {
status = inb(fd->base + SCSI_Status); /* Read adapter status */
if (status & 1) { /* Busy asserted */
/* Enable SCSI Bus */
/* (on error, should make bus idle with 0) */
outb(0x80, fd->base + SCSI_Cntl);
return 0;
}
mdelay(1);
} while (--timeout);
fdomain_make_bus_idle(fd);
return 1;
}
static void fdomain_finish_cmd(struct fdomain *fd, int result)
{
outb(0x00, fd->base + Interrupt_Cntl);
fdomain_make_bus_idle(fd);
fd->cur_cmd->result = result;
fd->cur_cmd->scsi_done(fd->cur_cmd);
fd->cur_cmd = NULL;
}
static void fdomain_read_data(struct scsi_cmnd *cmd)
{
struct fdomain *fd = shost_priv(cmd->device->host);
unsigned char *virt, *ptr;
size_t offset, len;
while ((len = inw(fd->base + FIFO_Data_Count)) > 0) {
offset = scsi_bufflen(cmd) - scsi_get_resid(cmd);
virt = scsi_kmap_atomic_sg(scsi_sglist(cmd), scsi_sg_count(cmd),
&offset, &len);
ptr = virt + offset;
if (len & 1)
*ptr++ = inb(fd->base + Read_FIFO);
if (len > 1)
insw(fd->base + Read_FIFO, ptr, len >> 1);
scsi_set_resid(cmd, scsi_get_resid(cmd) - len);
scsi_kunmap_atomic_sg(virt);
}
}
static void fdomain_write_data(struct scsi_cmnd *cmd)
{
struct fdomain *fd = shost_priv(cmd->device->host);
/* 8k FIFO for pre-tmc18c30 chips, 2k FIFO for tmc18c30 */
int FIFO_Size = fd->chip == tmc18c30 ? 0x800 : 0x2000;
unsigned char *virt, *ptr;
size_t offset, len;
while ((len = FIFO_Size - inw(fd->base + FIFO_Data_Count)) > 512) {
offset = scsi_bufflen(cmd) - scsi_get_resid(cmd);
if (len + offset > scsi_bufflen(cmd)) {
len = scsi_bufflen(cmd) - offset;
if (len == 0)
break;
}
virt = scsi_kmap_atomic_sg(scsi_sglist(cmd), scsi_sg_count(cmd),
&offset, &len);
ptr = virt + offset;
if (len & 1)
outb(*ptr++, fd->base + Write_FIFO);
if (len > 1)
outsw(fd->base + Write_FIFO, ptr, len >> 1);
scsi_set_resid(cmd, scsi_get_resid(cmd) - len);
scsi_kunmap_atomic_sg(virt);
}
}
static void fdomain_work(struct work_struct *work)
{
struct fdomain *fd = container_of(work, struct fdomain, work);
struct Scsi_Host *sh = container_of((void *)fd, struct Scsi_Host,
hostdata);
struct scsi_cmnd *cmd = fd->cur_cmd;
unsigned long flags;
int status;
int done = 0;
spin_lock_irqsave(sh->host_lock, flags);
if (cmd->SCp.phase & in_arbitration) {
status = inb(fd->base + TMC_Status);
if (!(status & 0x02)) {
fdomain_finish_cmd(fd, DID_BUS_BUSY << 16);
goto out;
}
cmd->SCp.phase = in_selection;
outb(0x40 | FIFO_COUNT, fd->base + Interrupt_Cntl);
outb(0x82, fd->base + SCSI_Cntl); /* Bus Enable + Select */
outb(BIT(cmd->device->host->this_id) |
BIT(scmd_id(cmd)), fd->base + SCSI_Data_NoACK);
/* Stop arbitration and enable parity */
outb(0x10 | PARITY_MASK, fd->base + TMC_Cntl);
goto out;
} else if (cmd->SCp.phase & in_selection) {
status = inb(fd->base + SCSI_Status);
if (!(status & 0x01)) {
/* Try again, for slow devices */
if (fdomain_select(cmd->device->host, scmd_id(cmd))) {
fdomain_finish_cmd(fd, DID_NO_CONNECT << 16);
goto out;
}
/* Stop arbitration and enable parity */
outb(0x10 | PARITY_MASK, fd->base + TMC_Cntl);
}
cmd->SCp.phase = in_other;
outb(0x90 | FIFO_COUNT, fd->base + Interrupt_Cntl);
outb(0x80, fd->base + SCSI_Cntl);
goto out;
}
/* cur_cmd->SCp.phase == in_other: this is the body of the routine */
status = inb(fd->base + SCSI_Status);
if (status & 0x10) { /* REQ */
switch (status & 0x0e) {
case 0x08: /* COMMAND OUT */
outb(cmd->cmnd[cmd->SCp.sent_command++],
fd->base + Write_SCSI_Data);
break;
case 0x00: /* DATA OUT -- tmc18c50/tmc18c30 only */
if (fd->chip != tmc1800 && !cmd->SCp.have_data_in) {
cmd->SCp.have_data_in = -1;
outb(0xd0 | PARITY_MASK, fd->base + TMC_Cntl);
}
break;
case 0x04: /* DATA IN -- tmc18c50/tmc18c30 only */
if (fd->chip != tmc1800 && !cmd->SCp.have_data_in) {
cmd->SCp.have_data_in = 1;
outb(0x90 | PARITY_MASK, fd->base + TMC_Cntl);
}
break;
case 0x0c: /* STATUS IN */
cmd->SCp.Status = inb(fd->base + Read_SCSI_Data);
break;
case 0x0a: /* MESSAGE OUT */
outb(MESSAGE_REJECT, fd->base + Write_SCSI_Data);
break;
case 0x0e: /* MESSAGE IN */
cmd->SCp.Message = inb(fd->base + Read_SCSI_Data);
if (!cmd->SCp.Message)
++done;
break;
}
}
if (fd->chip == tmc1800 && !cmd->SCp.have_data_in &&
cmd->SCp.sent_command >= cmd->cmd_len) {
if (cmd->sc_data_direction == DMA_TO_DEVICE) {
cmd->SCp.have_data_in = -1;
outb(0xd0 | PARITY_MASK, fd->base + TMC_Cntl);
} else {
cmd->SCp.have_data_in = 1;
outb(0x90 | PARITY_MASK, fd->base + TMC_Cntl);
}
}
if (cmd->SCp.have_data_in == -1) /* DATA OUT */
fdomain_write_data(cmd);
if (cmd->SCp.have_data_in == 1) /* DATA IN */
fdomain_read_data(cmd);
if (done) {
fdomain_finish_cmd(fd, (cmd->SCp.Status & 0xff) |
((cmd->SCp.Message & 0xff) << 8) |
(DID_OK << 16));
} else {
if (cmd->SCp.phase & disconnect) {
outb(0xd0 | FIFO_COUNT, fd->base + Interrupt_Cntl);
outb(0x00, fd->base + SCSI_Cntl);
} else
outb(0x90 | FIFO_COUNT, fd->base + Interrupt_Cntl);
}
out:
spin_unlock_irqrestore(sh->host_lock, flags);
}
static irqreturn_t fdomain_irq(int irq, void *dev_id)
{
struct fdomain *fd = dev_id;
/* Is it our IRQ? */
if ((inb(fd->base + TMC_Status) & 0x01) == 0)
return IRQ_NONE;
outb(0x00, fd->base + Interrupt_Cntl);
/* We usually have one spurious interrupt after each command. */
if (!fd->cur_cmd) /* Spurious interrupt */
return IRQ_NONE;
schedule_work(&fd->work);
return IRQ_HANDLED;
}
static int fdomain_queue(struct Scsi_Host *sh, struct scsi_cmnd *cmd)
{
struct fdomain *fd = shost_priv(cmd->device->host);
unsigned long flags;
cmd->SCp.Status = 0;
cmd->SCp.Message = 0;
cmd->SCp.have_data_in = 0;
cmd->SCp.sent_command = 0;
cmd->SCp.phase = in_arbitration;
scsi_set_resid(cmd, scsi_bufflen(cmd));
spin_lock_irqsave(sh->host_lock, flags);
fd->cur_cmd = cmd;
fdomain_make_bus_idle(fd);
/* Start arbitration */
outb(0x00, fd->base + Interrupt_Cntl);
outb(0x00, fd->base + SCSI_Cntl); /* Disable data drivers */
outb(BIT(cmd->device->host->this_id),
fd->base + SCSI_Data_NoACK); /* Set our id bit */
outb(0x20, fd->base + Interrupt_Cntl);
outb(0x14 | PARITY_MASK, fd->base + TMC_Cntl); /* Start arbitration */
spin_unlock_irqrestore(sh->host_lock, flags);
return 0;
}
static int fdomain_abort(struct scsi_cmnd *cmd)
{
struct Scsi_Host *sh = cmd->device->host;
struct fdomain *fd = shost_priv(sh);
unsigned long flags;
if (!fd->cur_cmd)
return FAILED;
spin_lock_irqsave(sh->host_lock, flags);
fdomain_make_bus_idle(fd);
fd->cur_cmd->SCp.phase |= aborted;
fd->cur_cmd->result = DID_ABORT << 16;
/* Aborts are not done well. . . */
fdomain_finish_cmd(fd, DID_ABORT << 16);
spin_unlock_irqrestore(sh->host_lock, flags);
return SUCCESS;
}
static int fdomain_host_reset(struct scsi_cmnd *cmd)
{
struct Scsi_Host *sh = cmd->device->host;
struct fdomain *fd = shost_priv(sh);
unsigned long flags;
spin_lock_irqsave(sh->host_lock, flags);
fdomain_reset(fd->base);
spin_unlock_irqrestore(sh->host_lock, flags);
return SUCCESS;
}
static int fdomain_biosparam(struct scsi_device *sdev,
struct block_device *bdev, sector_t capacity,
int geom[])
{
unsigned char *p = scsi_bios_ptable(bdev);
if (p && p[65] == 0xaa && p[64] == 0x55 /* Partition table valid */
&& p[4]) { /* Partition type */
geom[0] = p[5] + 1; /* heads */
geom[1] = p[6] & 0x3f; /* sectors */
} else {
if (capacity >= 0x7e0000) {
geom[0] = 255; /* heads */
geom[1] = 63; /* sectors */
} else if (capacity >= 0x200000) {
geom[0] = 128; /* heads */
geom[1] = 63; /* sectors */
} else {
geom[0] = 64; /* heads */
geom[1] = 32; /* sectors */
}
}
geom[2] = sector_div(capacity, geom[0] * geom[1]);
kfree(p);
return 0;
}
static struct scsi_host_template fdomain_template = {
.module = THIS_MODULE,
.name = "Future Domain TMC-16x0",
.proc_name = "fdomain",
.queuecommand = fdomain_queue,
.eh_abort_handler = fdomain_abort,
.eh_host_reset_handler = fdomain_host_reset,
.bios_param = fdomain_biosparam,
.can_queue = 1,
.this_id = 7,
.sg_tablesize = 64,
.dma_boundary = PAGE_SIZE - 1,
};
struct Scsi_Host *fdomain_create(int base, int irq, int this_id,
struct device *dev)
{
struct Scsi_Host *sh;
struct fdomain *fd;
enum chip_type chip;
static const char * const chip_names[] = {
"Unknown", "TMC-1800", "TMC-18C50", "TMC-18C30"
};
chip = fdomain_identify(base);
if (!chip)
return NULL;
fdomain_reset(base);
if (fdomain_test_loopback(base))
return NULL;
if (!irq) {
dev_err(dev, "card has no IRQ assigned");
return NULL;
}
sh = scsi_host_alloc(&fdomain_template, sizeof(struct fdomain));
if (!sh)
return NULL;
if (this_id)
sh->this_id = this_id & 0x07;
sh->irq = irq;
sh->io_port = base;
sh->n_io_port = FDOMAIN_REGION_SIZE;
fd = shost_priv(sh);
fd->base = base;
fd->chip = chip;
INIT_WORK(&fd->work, fdomain_work);
if (request_irq(irq, fdomain_irq, dev_is_pci(dev) ? IRQF_SHARED : 0,
"fdomain", fd))
goto fail_put;
shost_printk(KERN_INFO, sh, "%s chip at 0x%x irq %d SCSI ID %d\n",
dev_is_pci(dev) ? "TMC-36C70 (PCI bus)" : chip_names[chip],
base, irq, sh->this_id);
if (scsi_add_host(sh, dev))
goto fail_free_irq;
scsi_scan_host(sh);
return sh;
fail_free_irq:
free_irq(irq, fd);
fail_put:
scsi_host_put(sh);
return NULL;
}
EXPORT_SYMBOL_GPL(fdomain_create);
int fdomain_destroy(struct Scsi_Host *sh)
{
struct fdomain *fd = shost_priv(sh);
cancel_work_sync(&fd->work);
scsi_remove_host(sh);
if (sh->irq)
free_irq(sh->irq, fd);
scsi_host_put(sh);
return 0;
}
EXPORT_SYMBOL_GPL(fdomain_destroy);
#ifdef CONFIG_PM_SLEEP
static int fdomain_resume(struct device *dev)
{
struct fdomain *fd = shost_priv(dev_get_drvdata(dev));
fdomain_reset(fd->base);
return 0;
}
static SIMPLE_DEV_PM_OPS(fdomain_pm_ops, NULL, fdomain_resume);
#endif /* CONFIG_PM_SLEEP */
MODULE_AUTHOR("Ondrej Zary, Rickard E. Faith");
MODULE_DESCRIPTION("Future Domain TMC-16x0/TMC-3260 SCSI driver");
MODULE_LICENSE("GPL");

53
drivers/scsi/fdomain.h Normal file
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@ -0,0 +1,53 @@
/* SPDX-License-Identifier: GPL-2.0 */
#define FDOMAIN_REGION_SIZE 0x10
#define FDOMAIN_BIOS_SIZE 0x2000
enum {
in_arbitration = 0x02,
in_selection = 0x04,
in_other = 0x08,
disconnect = 0x10,
aborted = 0x20,
sent_ident = 0x40,
};
enum in_port_type {
Read_SCSI_Data = 0,
SCSI_Status = 1,
TMC_Status = 2,
FIFO_Status = 3, /* tmc18c50/tmc18c30 only */
Interrupt_Cond = 4, /* tmc18c50/tmc18c30 only */
LSB_ID_Code = 5,
MSB_ID_Code = 6,
Read_Loopback = 7,
SCSI_Data_NoACK = 8,
Interrupt_Status = 9,
Configuration1 = 10,
Configuration2 = 11, /* tmc18c50/tmc18c30 only */
Read_FIFO = 12,
FIFO_Data_Count = 14
};
enum out_port_type {
Write_SCSI_Data = 0,
SCSI_Cntl = 1,
Interrupt_Cntl = 2,
SCSI_Mode_Cntl = 3,
TMC_Cntl = 4,
Memory_Cntl = 5, /* tmc18c50/tmc18c30 only */
Write_Loopback = 7,
IO_Control = 11, /* tmc18c30 only */
Write_FIFO = 12
};
#ifdef CONFIG_PM_SLEEP
static const struct dev_pm_ops fdomain_pm_ops;
#define FDOMAIN_PM_OPS (&fdomain_pm_ops)
#else
#define FDOMAIN_PM_OPS NULL
#endif /* CONFIG_PM_SLEEP */
struct Scsi_Host *fdomain_create(int base, int irq, int this_id,
struct device *dev);
int fdomain_destroy(struct Scsi_Host *sh);