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0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * Driver for Future Domain TMC-16x0 and TMC-3260 SCSI host adapters
0004  * Copyright 2019 Ondrej Zary
0005  *
0006  * Original driver by
0007  * Rickard E. Faith, faith@cs.unc.edu
0008  *
0009  * Future Domain BIOS versions supported for autodetect:
0010  *    2.0, 3.0, 3.2, 3.4 (1.0), 3.5 (2.0), 3.6, 3.61
0011  * Chips supported:
0012  *    TMC-1800, TMC-18C50, TMC-18C30, TMC-36C70
0013  * Boards supported:
0014  *    Future Domain TMC-1650, TMC-1660, TMC-1670, TMC-1680, TMC-1610M/MER/MEX
0015  *    Future Domain TMC-3260 (PCI)
0016  *    Quantum ISA-200S, ISA-250MG
0017  *    Adaptec AHA-2920A (PCI) [BUT *NOT* AHA-2920C -- use aic7xxx instead]
0018  *    IBM ?
0019  *
0020  * NOTE:
0021  *
0022  * The Adaptec AHA-2920C has an Adaptec AIC-7850 chip on it.
0023  * Use the aic7xxx driver for this board.
0024  *
0025  * The Adaptec AHA-2920A has a Future Domain chip on it, so this is the right
0026  * driver for that card.  Unfortunately, the boxes will probably just say
0027  * "2920", so you'll have to look on the card for a Future Domain logo, or a
0028  * letter after the 2920.
0029  *
0030  * If you have a TMC-8xx or TMC-9xx board, then this is not the driver for
0031  * your board.
0032  *
0033  * DESCRIPTION:
0034  *
0035  * This is the Linux low-level SCSI driver for Future Domain TMC-1660/1680
0036  * TMC-1650/1670, and TMC-3260 SCSI host adapters.  The 1650 and 1670 have a
0037  * 25-pin external connector, whereas the 1660 and 1680 have a SCSI-2 50-pin
0038  * high-density external connector.  The 1670 and 1680 have floppy disk
0039  * controllers built in.  The TMC-3260 is a PCI bus card.
0040  *
0041  * Future Domain's older boards are based on the TMC-1800 chip, and this
0042  * driver was originally written for a TMC-1680 board with the TMC-1800 chip.
0043  * More recently, boards are being produced with the TMC-18C50 and TMC-18C30
0044  * chips.
0045  *
0046  * Please note that the drive ordering that Future Domain implemented in BIOS
0047  * versions 3.4 and 3.5 is the opposite of the order (currently) used by the
0048  * rest of the SCSI industry.
0049  *
0050  *
0051  * REFERENCES USED:
0052  *
0053  * "TMC-1800 SCSI Chip Specification (FDC-1800T)", Future Domain Corporation,
0054  * 1990.
0055  *
0056  * "Technical Reference Manual: 18C50 SCSI Host Adapter Chip", Future Domain
0057  * Corporation, January 1992.
0058  *
0059  * "LXT SCSI Products: Specifications and OEM Technical Manual (Revision
0060  * B/September 1991)", Maxtor Corporation, 1991.
0061  *
0062  * "7213S product Manual (Revision P3)", Maxtor Corporation, 1992.
0063  *
0064  * "Draft Proposed American National Standard: Small Computer System
0065  * Interface - 2 (SCSI-2)", Global Engineering Documents. (X3T9.2/86-109,
0066  * revision 10h, October 17, 1991)
0067  *
0068  * Private communications, Drew Eckhardt (drew@cs.colorado.edu) and Eric
0069  * Youngdale (ericy@cais.com), 1992.
0070  *
0071  * Private communication, Tuong Le (Future Domain Engineering department),
0072  * 1994. (Disk geometry computations for Future Domain BIOS version 3.4, and
0073  * TMC-18C30 detection.)
0074  *
0075  * Hogan, Thom. The Programmer's PC Sourcebook. Microsoft Press, 1988. Page
0076  * 60 (2.39: Disk Partition Table Layout).
0077  *
0078  * "18C30 Technical Reference Manual", Future Domain Corporation, 1993, page
0079  * 6-1.
0080  */
0081 
0082 #include <linux/module.h>
0083 #include <linux/interrupt.h>
0084 #include <linux/delay.h>
0085 #include <linux/pci.h>
0086 #include <linux/workqueue.h>
0087 #include <scsi/scsicam.h>
0088 #include <scsi/scsi_cmnd.h>
0089 #include <scsi/scsi_device.h>
0090 #include <scsi/scsi_host.h>
0091 #include "fdomain.h"
0092 
0093 /*
0094  * FIFO_COUNT: The host adapter has an 8K cache (host adapters based on the
0095  * 18C30 chip have a 2k cache).  When this many 512 byte blocks are filled by
0096  * the SCSI device, an interrupt will be raised.  Therefore, this could be as
0097  * low as 0, or as high as 16.  Note, however, that values which are too high
0098  * or too low seem to prevent any interrupts from occurring, and thereby lock
0099  * up the machine.
0100  */
0101 #define FIFO_COUNT  2   /* Number of 512 byte blocks before INTR */
0102 #define PARITY_MASK ACTL_PAREN  /* Parity enabled, 0 = disabled */
0103 
0104 enum chip_type {
0105     unknown     = 0x00,
0106     tmc1800     = 0x01,
0107     tmc18c50    = 0x02,
0108     tmc18c30    = 0x03,
0109 };
0110 
0111 struct fdomain {
0112     int base;
0113     struct scsi_cmnd *cur_cmd;
0114     enum chip_type chip;
0115     struct work_struct work;
0116 };
0117 
0118 static struct scsi_pointer *fdomain_scsi_pointer(struct scsi_cmnd *cmd)
0119 {
0120     return scsi_cmd_priv(cmd);
0121 }
0122 
0123 static inline void fdomain_make_bus_idle(struct fdomain *fd)
0124 {
0125     outb(0, fd->base + REG_BCTL);
0126     outb(0, fd->base + REG_MCTL);
0127     if (fd->chip == tmc18c50 || fd->chip == tmc18c30)
0128         /* Clear forced intr. */
0129         outb(ACTL_RESET | ACTL_CLRFIRQ | PARITY_MASK,
0130              fd->base + REG_ACTL);
0131     else
0132         outb(ACTL_RESET | PARITY_MASK, fd->base + REG_ACTL);
0133 }
0134 
0135 static enum chip_type fdomain_identify(int port)
0136 {
0137     u16 id = inb(port + REG_ID_LSB) | inb(port + REG_ID_MSB) << 8;
0138 
0139     switch (id) {
0140     case 0x6127:
0141         return tmc1800;
0142     case 0x60e9: /* 18c50 or 18c30 */
0143         break;
0144     default:
0145         return unknown;
0146     }
0147 
0148     /* Try to toggle 32-bit mode. This only works on an 18c30 chip. */
0149     outb(CFG2_32BIT, port + REG_CFG2);
0150     if ((inb(port + REG_CFG2) & CFG2_32BIT)) {
0151         outb(0, port + REG_CFG2);
0152         if ((inb(port + REG_CFG2) & CFG2_32BIT) == 0)
0153             return tmc18c30;
0154     }
0155     /* If that failed, we are an 18c50. */
0156     return tmc18c50;
0157 }
0158 
0159 static int fdomain_test_loopback(int base)
0160 {
0161     int i;
0162 
0163     for (i = 0; i < 255; i++) {
0164         outb(i, base + REG_LOOPBACK);
0165         if (inb(base + REG_LOOPBACK) != i)
0166             return 1;
0167     }
0168 
0169     return 0;
0170 }
0171 
0172 static void fdomain_reset(int base)
0173 {
0174     outb(BCTL_RST, base + REG_BCTL);
0175     mdelay(20);
0176     outb(0, base + REG_BCTL);
0177     mdelay(1150);
0178     outb(0, base + REG_MCTL);
0179     outb(PARITY_MASK, base + REG_ACTL);
0180 }
0181 
0182 static int fdomain_select(struct Scsi_Host *sh, int target)
0183 {
0184     int status;
0185     unsigned long timeout;
0186     struct fdomain *fd = shost_priv(sh);
0187 
0188     outb(BCTL_BUSEN | BCTL_SEL, fd->base + REG_BCTL);
0189     outb(BIT(sh->this_id) | BIT(target), fd->base + REG_SCSI_DATA_NOACK);
0190 
0191     /* Stop arbitration and enable parity */
0192     outb(PARITY_MASK, fd->base + REG_ACTL);
0193 
0194     timeout = 350;  /* 350 msec */
0195 
0196     do {
0197         status = inb(fd->base + REG_BSTAT);
0198         if (status & BSTAT_BSY) {
0199             /* Enable SCSI Bus */
0200             /* (on error, should make bus idle with 0) */
0201             outb(BCTL_BUSEN, fd->base + REG_BCTL);
0202             return 0;
0203         }
0204         mdelay(1);
0205     } while (--timeout);
0206     fdomain_make_bus_idle(fd);
0207     return 1;
0208 }
0209 
0210 static void fdomain_finish_cmd(struct fdomain *fd)
0211 {
0212     outb(0, fd->base + REG_ICTL);
0213     fdomain_make_bus_idle(fd);
0214     scsi_done(fd->cur_cmd);
0215     fd->cur_cmd = NULL;
0216 }
0217 
0218 static void fdomain_read_data(struct scsi_cmnd *cmd)
0219 {
0220     struct fdomain *fd = shost_priv(cmd->device->host);
0221     unsigned char *virt, *ptr;
0222     size_t offset, len;
0223 
0224     while ((len = inw(fd->base + REG_FIFO_COUNT)) > 0) {
0225         offset = scsi_bufflen(cmd) - scsi_get_resid(cmd);
0226         virt = scsi_kmap_atomic_sg(scsi_sglist(cmd), scsi_sg_count(cmd),
0227                        &offset, &len);
0228         ptr = virt + offset;
0229         if (len & 1)
0230             *ptr++ = inb(fd->base + REG_FIFO);
0231         if (len > 1)
0232             insw(fd->base + REG_FIFO, ptr, len >> 1);
0233         scsi_set_resid(cmd, scsi_get_resid(cmd) - len);
0234         scsi_kunmap_atomic_sg(virt);
0235     }
0236 }
0237 
0238 static void fdomain_write_data(struct scsi_cmnd *cmd)
0239 {
0240     struct fdomain *fd = shost_priv(cmd->device->host);
0241     /* 8k FIFO for pre-tmc18c30 chips, 2k FIFO for tmc18c30 */
0242     int FIFO_Size = fd->chip == tmc18c30 ? 0x800 : 0x2000;
0243     unsigned char *virt, *ptr;
0244     size_t offset, len;
0245 
0246     while ((len = FIFO_Size - inw(fd->base + REG_FIFO_COUNT)) > 512) {
0247         offset = scsi_bufflen(cmd) - scsi_get_resid(cmd);
0248         if (len + offset > scsi_bufflen(cmd)) {
0249             len = scsi_bufflen(cmd) - offset;
0250             if (len == 0)
0251                 break;
0252         }
0253         virt = scsi_kmap_atomic_sg(scsi_sglist(cmd), scsi_sg_count(cmd),
0254                        &offset, &len);
0255         ptr = virt + offset;
0256         if (len & 1)
0257             outb(*ptr++, fd->base + REG_FIFO);
0258         if (len > 1)
0259             outsw(fd->base + REG_FIFO, ptr, len >> 1);
0260         scsi_set_resid(cmd, scsi_get_resid(cmd) - len);
0261         scsi_kunmap_atomic_sg(virt);
0262     }
0263 }
0264 
0265 static void fdomain_work(struct work_struct *work)
0266 {
0267     struct fdomain *fd = container_of(work, struct fdomain, work);
0268     struct Scsi_Host *sh = container_of((void *)fd, struct Scsi_Host,
0269                         hostdata);
0270     struct scsi_cmnd *cmd = fd->cur_cmd;
0271     struct scsi_pointer *scsi_pointer = fdomain_scsi_pointer(cmd);
0272     unsigned long flags;
0273     int status;
0274     int done = 0;
0275 
0276     spin_lock_irqsave(sh->host_lock, flags);
0277 
0278     if (scsi_pointer->phase & in_arbitration) {
0279         status = inb(fd->base + REG_ASTAT);
0280         if (!(status & ASTAT_ARB)) {
0281             set_host_byte(cmd, DID_BUS_BUSY);
0282             fdomain_finish_cmd(fd);
0283             goto out;
0284         }
0285         scsi_pointer->phase = in_selection;
0286 
0287         outb(ICTL_SEL | FIFO_COUNT, fd->base + REG_ICTL);
0288         outb(BCTL_BUSEN | BCTL_SEL, fd->base + REG_BCTL);
0289         outb(BIT(cmd->device->host->this_id) | BIT(scmd_id(cmd)),
0290              fd->base + REG_SCSI_DATA_NOACK);
0291         /* Stop arbitration and enable parity */
0292         outb(ACTL_IRQEN | PARITY_MASK, fd->base + REG_ACTL);
0293         goto out;
0294     } else if (scsi_pointer->phase & in_selection) {
0295         status = inb(fd->base + REG_BSTAT);
0296         if (!(status & BSTAT_BSY)) {
0297             /* Try again, for slow devices */
0298             if (fdomain_select(cmd->device->host, scmd_id(cmd))) {
0299                 set_host_byte(cmd, DID_NO_CONNECT);
0300                 fdomain_finish_cmd(fd);
0301                 goto out;
0302             }
0303             /* Stop arbitration and enable parity */
0304             outb(ACTL_IRQEN | PARITY_MASK, fd->base + REG_ACTL);
0305         }
0306         scsi_pointer->phase = in_other;
0307         outb(ICTL_FIFO | ICTL_REQ | FIFO_COUNT, fd->base + REG_ICTL);
0308         outb(BCTL_BUSEN, fd->base + REG_BCTL);
0309         goto out;
0310     }
0311 
0312     /* fdomain_scsi_pointer(cur_cmd)->phase == in_other: this is the body of the routine */
0313     status = inb(fd->base + REG_BSTAT);
0314 
0315     if (status & BSTAT_REQ) {
0316         switch (status & (BSTAT_MSG | BSTAT_CMD | BSTAT_IO)) {
0317         case BSTAT_CMD: /* COMMAND OUT */
0318             outb(cmd->cmnd[scsi_pointer->sent_command++],
0319                  fd->base + REG_SCSI_DATA);
0320             break;
0321         case 0: /* DATA OUT -- tmc18c50/tmc18c30 only */
0322             if (fd->chip != tmc1800 && !scsi_pointer->have_data_in) {
0323                 scsi_pointer->have_data_in = -1;
0324                 outb(ACTL_IRQEN | ACTL_FIFOWR | ACTL_FIFOEN |
0325                      PARITY_MASK, fd->base + REG_ACTL);
0326             }
0327             break;
0328         case BSTAT_IO:  /* DATA IN -- tmc18c50/tmc18c30 only */
0329             if (fd->chip != tmc1800 && !scsi_pointer->have_data_in) {
0330                 scsi_pointer->have_data_in = 1;
0331                 outb(ACTL_IRQEN | ACTL_FIFOEN | PARITY_MASK,
0332                      fd->base + REG_ACTL);
0333             }
0334             break;
0335         case BSTAT_CMD | BSTAT_IO:  /* STATUS IN */
0336             scsi_pointer->Status = inb(fd->base + REG_SCSI_DATA);
0337             break;
0338         case BSTAT_MSG | BSTAT_CMD: /* MESSAGE OUT */
0339             outb(MESSAGE_REJECT, fd->base + REG_SCSI_DATA);
0340             break;
0341         case BSTAT_MSG | BSTAT_CMD | BSTAT_IO:  /* MESSAGE IN */
0342             scsi_pointer->Message = inb(fd->base + REG_SCSI_DATA);
0343             if (scsi_pointer->Message == COMMAND_COMPLETE)
0344                 ++done;
0345             break;
0346         }
0347     }
0348 
0349     if (fd->chip == tmc1800 && !scsi_pointer->have_data_in &&
0350         scsi_pointer->sent_command >= cmd->cmd_len) {
0351         if (cmd->sc_data_direction == DMA_TO_DEVICE) {
0352             scsi_pointer->have_data_in = -1;
0353             outb(ACTL_IRQEN | ACTL_FIFOWR | ACTL_FIFOEN |
0354                  PARITY_MASK, fd->base + REG_ACTL);
0355         } else {
0356             scsi_pointer->have_data_in = 1;
0357             outb(ACTL_IRQEN | ACTL_FIFOEN | PARITY_MASK,
0358                  fd->base + REG_ACTL);
0359         }
0360     }
0361 
0362     if (scsi_pointer->have_data_in == -1) /* DATA OUT */
0363         fdomain_write_data(cmd);
0364 
0365     if (scsi_pointer->have_data_in == 1) /* DATA IN */
0366         fdomain_read_data(cmd);
0367 
0368     if (done) {
0369         set_status_byte(cmd, scsi_pointer->Status);
0370         set_host_byte(cmd, DID_OK);
0371         scsi_msg_to_host_byte(cmd, scsi_pointer->Message);
0372         fdomain_finish_cmd(fd);
0373     } else {
0374         if (scsi_pointer->phase & disconnect) {
0375             outb(ICTL_FIFO | ICTL_SEL | ICTL_REQ | FIFO_COUNT,
0376                  fd->base + REG_ICTL);
0377             outb(0, fd->base + REG_BCTL);
0378         } else
0379             outb(ICTL_FIFO | ICTL_REQ | FIFO_COUNT,
0380                  fd->base + REG_ICTL);
0381     }
0382 out:
0383     spin_unlock_irqrestore(sh->host_lock, flags);
0384 }
0385 
0386 static irqreturn_t fdomain_irq(int irq, void *dev_id)
0387 {
0388     struct fdomain *fd = dev_id;
0389 
0390     /* Is it our IRQ? */
0391     if ((inb(fd->base + REG_ASTAT) & ASTAT_IRQ) == 0)
0392         return IRQ_NONE;
0393 
0394     outb(0, fd->base + REG_ICTL);
0395 
0396     /* We usually have one spurious interrupt after each command. */
0397     if (!fd->cur_cmd)   /* Spurious interrupt */
0398         return IRQ_NONE;
0399 
0400     schedule_work(&fd->work);
0401 
0402     return IRQ_HANDLED;
0403 }
0404 
0405 static int fdomain_queue(struct Scsi_Host *sh, struct scsi_cmnd *cmd)
0406 {
0407     struct scsi_pointer *scsi_pointer = fdomain_scsi_pointer(cmd);
0408     struct fdomain *fd = shost_priv(cmd->device->host);
0409     unsigned long flags;
0410 
0411     scsi_pointer->Status        = 0;
0412     scsi_pointer->Message       = 0;
0413     scsi_pointer->have_data_in  = 0;
0414     scsi_pointer->sent_command  = 0;
0415     scsi_pointer->phase     = in_arbitration;
0416     scsi_set_resid(cmd, scsi_bufflen(cmd));
0417 
0418     spin_lock_irqsave(sh->host_lock, flags);
0419 
0420     fd->cur_cmd = cmd;
0421 
0422     fdomain_make_bus_idle(fd);
0423 
0424     /* Start arbitration */
0425     outb(0, fd->base + REG_ICTL);
0426     outb(0, fd->base + REG_BCTL);   /* Disable data drivers */
0427     /* Set our id bit */
0428     outb(BIT(cmd->device->host->this_id), fd->base + REG_SCSI_DATA_NOACK);
0429     outb(ICTL_ARB, fd->base + REG_ICTL);
0430     /* Start arbitration */
0431     outb(ACTL_ARB | ACTL_IRQEN | PARITY_MASK, fd->base + REG_ACTL);
0432 
0433     spin_unlock_irqrestore(sh->host_lock, flags);
0434 
0435     return 0;
0436 }
0437 
0438 static int fdomain_abort(struct scsi_cmnd *cmd)
0439 {
0440     struct Scsi_Host *sh = cmd->device->host;
0441     struct fdomain *fd = shost_priv(sh);
0442     unsigned long flags;
0443 
0444     if (!fd->cur_cmd)
0445         return FAILED;
0446 
0447     spin_lock_irqsave(sh->host_lock, flags);
0448 
0449     fdomain_make_bus_idle(fd);
0450     fdomain_scsi_pointer(fd->cur_cmd)->phase |= aborted;
0451 
0452     /* Aborts are not done well. . . */
0453     set_host_byte(fd->cur_cmd, DID_ABORT);
0454     fdomain_finish_cmd(fd);
0455     spin_unlock_irqrestore(sh->host_lock, flags);
0456     return SUCCESS;
0457 }
0458 
0459 static int fdomain_host_reset(struct scsi_cmnd *cmd)
0460 {
0461     struct Scsi_Host *sh = cmd->device->host;
0462     struct fdomain *fd = shost_priv(sh);
0463     unsigned long flags;
0464 
0465     spin_lock_irqsave(sh->host_lock, flags);
0466     fdomain_reset(fd->base);
0467     spin_unlock_irqrestore(sh->host_lock, flags);
0468     return SUCCESS;
0469 }
0470 
0471 static int fdomain_biosparam(struct scsi_device *sdev,
0472                  struct block_device *bdev, sector_t capacity,
0473                  int geom[])
0474 {
0475     unsigned char *p = scsi_bios_ptable(bdev);
0476 
0477     if (p && p[65] == 0xaa && p[64] == 0x55 /* Partition table valid */
0478         && p[4]) {   /* Partition type */
0479         geom[0] = p[5] + 1; /* heads */
0480         geom[1] = p[6] & 0x3f;  /* sectors */
0481     } else {
0482         if (capacity >= 0x7e0000) {
0483             geom[0] = 255;  /* heads */
0484             geom[1] = 63;   /* sectors */
0485         } else if (capacity >= 0x200000) {
0486             geom[0] = 128;  /* heads */
0487             geom[1] = 63;   /* sectors */
0488         } else {
0489             geom[0] = 64;   /* heads */
0490             geom[1] = 32;   /* sectors */
0491         }
0492     }
0493     geom[2] = sector_div(capacity, geom[0] * geom[1]);
0494     kfree(p);
0495 
0496     return 0;
0497 }
0498 
0499 static struct scsi_host_template fdomain_template = {
0500     .module         = THIS_MODULE,
0501     .name           = "Future Domain TMC-16x0",
0502     .proc_name      = "fdomain",
0503     .queuecommand       = fdomain_queue,
0504     .eh_abort_handler   = fdomain_abort,
0505     .eh_host_reset_handler  = fdomain_host_reset,
0506     .bios_param     = fdomain_biosparam,
0507     .can_queue      = 1,
0508     .this_id        = 7,
0509     .sg_tablesize       = 64,
0510     .dma_boundary       = PAGE_SIZE - 1,
0511     .cmd_size       = sizeof(struct scsi_pointer),
0512 };
0513 
0514 struct Scsi_Host *fdomain_create(int base, int irq, int this_id,
0515                  struct device *dev)
0516 {
0517     struct Scsi_Host *sh;
0518     struct fdomain *fd;
0519     enum chip_type chip;
0520     static const char * const chip_names[] = {
0521         "Unknown", "TMC-1800", "TMC-18C50", "TMC-18C30"
0522     };
0523     unsigned long irq_flags = 0;
0524 
0525     chip = fdomain_identify(base);
0526     if (!chip)
0527         return NULL;
0528 
0529     fdomain_reset(base);
0530 
0531     if (fdomain_test_loopback(base))
0532         return NULL;
0533 
0534     if (!irq) {
0535         dev_err(dev, "card has no IRQ assigned");
0536         return NULL;
0537     }
0538 
0539     sh = scsi_host_alloc(&fdomain_template, sizeof(struct fdomain));
0540     if (!sh)
0541         return NULL;
0542 
0543     if (this_id)
0544         sh->this_id = this_id & 0x07;
0545 
0546     sh->irq = irq;
0547     sh->io_port = base;
0548     sh->n_io_port = FDOMAIN_REGION_SIZE;
0549 
0550     fd = shost_priv(sh);
0551     fd->base = base;
0552     fd->chip = chip;
0553     INIT_WORK(&fd->work, fdomain_work);
0554 
0555     if (dev_is_pci(dev) || !strcmp(dev->bus->name, "pcmcia"))
0556         irq_flags = IRQF_SHARED;
0557 
0558     if (request_irq(irq, fdomain_irq, irq_flags, "fdomain", fd))
0559         goto fail_put;
0560 
0561     shost_printk(KERN_INFO, sh, "%s chip at 0x%x irq %d SCSI ID %d\n",
0562              dev_is_pci(dev) ? "TMC-36C70 (PCI bus)" : chip_names[chip],
0563              base, irq, sh->this_id);
0564 
0565     if (scsi_add_host(sh, dev))
0566         goto fail_free_irq;
0567 
0568     scsi_scan_host(sh);
0569 
0570     return sh;
0571 
0572 fail_free_irq:
0573     free_irq(irq, fd);
0574 fail_put:
0575     scsi_host_put(sh);
0576     return NULL;
0577 }
0578 EXPORT_SYMBOL_GPL(fdomain_create);
0579 
0580 int fdomain_destroy(struct Scsi_Host *sh)
0581 {
0582     struct fdomain *fd = shost_priv(sh);
0583 
0584     cancel_work_sync(&fd->work);
0585     scsi_remove_host(sh);
0586     if (sh->irq)
0587         free_irq(sh->irq, fd);
0588     scsi_host_put(sh);
0589     return 0;
0590 }
0591 EXPORT_SYMBOL_GPL(fdomain_destroy);
0592 
0593 #ifdef CONFIG_PM_SLEEP
0594 static int fdomain_resume(struct device *dev)
0595 {
0596     struct fdomain *fd = shost_priv(dev_get_drvdata(dev));
0597 
0598     fdomain_reset(fd->base);
0599     return 0;
0600 }
0601 
0602 static SIMPLE_DEV_PM_OPS(fdomain_pm_ops, NULL, fdomain_resume);
0603 #endif /* CONFIG_PM_SLEEP */
0604 
0605 MODULE_AUTHOR("Ondrej Zary, Rickard E. Faith");
0606 MODULE_DESCRIPTION("Future Domain TMC-16x0/TMC-3260 SCSI driver");
0607 MODULE_LICENSE("GPL");
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