scsi: fdomain: Resurrect driver - Core (ebeb4665) · Commits · jan.koester / Linux

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

drivers/scsi/Makefile

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Original line number	Diff line number	Diff line
		@@ -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

drivers/scsi/fdomain.c

0 → 100644

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Original line number	Diff line number	Diff line
		// 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");

drivers/scsi/fdomain.h

0 → 100644

+53 −0

Original line number	Diff line number	Diff line
		/* 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);