diff options
Diffstat (limited to 'kernel/drivers/scsi/eata_pio.c')
| -rw-r--r-- | kernel/drivers/scsi/eata_pio.c | 965 |
1 files changed, 965 insertions, 0 deletions
diff --git a/kernel/drivers/scsi/eata_pio.c b/kernel/drivers/scsi/eata_pio.c new file mode 100644 index 000000000..ca8003f0d --- /dev/null +++ b/kernel/drivers/scsi/eata_pio.c @@ -0,0 +1,965 @@ +/************************************************************ + * * + * Linux EATA SCSI PIO driver * + * * + * based on the CAM document CAM/89-004 rev. 2.0c, * + * DPT's driver kit, some internal documents and source, * + * and several other Linux scsi drivers and kernel docs. * + * * + * The driver currently: * + * -supports all EATA-PIO boards * + * -only supports DASD devices * + * * + * (c)1993-96 Michael Neuffer, Alfred Arnold * + * neuffer@goofy.zdv.uni-mainz.de * + * a.arnold@kfa-juelich.de * + * * + * Updated 2002 by Alan Cox <alan@lxorguk.ukuu.org.uk> for * + * Linux 2.5.x and the newer locking and error handling * + * * + * This program is free software; you can redistribute it * + * and/or modify it under the terms of the GNU General * + * Public License as published by the Free Software * + * Foundation; either version 2 of the License, or * + * (at your option) any later version. * + * * + * This program is distributed in the hope that it will be * + * useful, but WITHOUT ANY WARRANTY; without even the * + * implied warranty of MERCHANTABILITY or FITNESS FOR A * + * PARTICULAR PURPOSE. See the GNU General Public License * + * for more details. * + * * + * You should have received a copy of the GNU General * + * Public License along with this kernel; if not, write to * + * the Free Software Foundation, Inc., 675 Mass Ave, * + * Cambridge, MA 02139, USA. * + * * + * For the avoidance of doubt the "preferred form" of this * + * code is one which is in an open non patent encumbered * + * format. Where cryptographic key signing forms part of * + * the process of creating an executable the information * + * including keys needed to generate an equivalently * + * functional executable are deemed to be part of the * + * source code are deemed to be part of the source code. * + * * + ************************************************************ + * last change: 2002/11/02 OS: Linux 2.5.45 * + ************************************************************/ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/ioport.h> +#include <linux/in.h> +#include <linux/pci.h> +#include <linux/proc_fs.h> +#include <linux/interrupt.h> +#include <linux/blkdev.h> +#include <linux/spinlock.h> +#include <linux/delay.h> + +#include <asm/io.h> + +#include <scsi/scsi.h> +#include <scsi/scsi_cmnd.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_host.h> + +#include "eata_generic.h" +#include "eata_pio.h" + + +static unsigned int ISAbases[MAXISA] = { + 0x1F0, 0x170, 0x330, 0x230 +}; + +static unsigned int ISAirqs[MAXISA] = { + 14, 12, 15, 11 +}; + +static unsigned char EISAbases[] = { + 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1 +}; + +static unsigned int registered_HBAs; +static struct Scsi_Host *last_HBA; +static struct Scsi_Host *first_HBA; +static unsigned char reg_IRQ[16]; +static unsigned char reg_IRQL[16]; +static unsigned long int_counter; +static unsigned long queue_counter; + +static struct scsi_host_template driver_template; + +static int eata_pio_show_info(struct seq_file *m, struct Scsi_Host *shost) +{ + seq_printf(m, "EATA (Extended Attachment) PIO driver version: " + "%d.%d%s\n",VER_MAJOR, VER_MINOR, VER_SUB); + seq_printf(m, "queued commands: %10ld\n" + "processed interrupts:%10ld\n", queue_counter, int_counter); + seq_printf(m, "\nscsi%-2d: HBA %.10s\n", + shost->host_no, SD(shost)->name); + seq_printf(m, "Firmware revision: v%s\n", + SD(shost)->revision); + seq_puts(m, "IO: PIO\n"); + seq_printf(m, "Base IO : %#.4x\n", (u32) shost->base); + seq_printf(m, "Host Bus: %s\n", + (SD(shost)->bustype == 'P')?"PCI ": + (SD(shost)->bustype == 'E')?"EISA":"ISA "); + return 0; +} + +static int eata_pio_release(struct Scsi_Host *sh) +{ + hostdata *hd = SD(sh); + if (sh->irq && reg_IRQ[sh->irq] == 1) + free_irq(sh->irq, NULL); + else + reg_IRQ[sh->irq]--; + if (SD(sh)->channel == 0) { + if (sh->io_port && sh->n_io_port) + release_region(sh->io_port, sh->n_io_port); + } + /* At this point the PCI reference can go */ + if (hd->pdev) + pci_dev_put(hd->pdev); + return 1; +} + +static void IncStat(struct scsi_pointer *SCp, unsigned int Increment) +{ + SCp->ptr += Increment; + if ((SCp->this_residual -= Increment) == 0) { + if ((--SCp->buffers_residual) == 0) + SCp->Status = 0; + else { + SCp->buffer++; + SCp->ptr = sg_virt(SCp->buffer); + SCp->this_residual = SCp->buffer->length; + } + } +} + +static irqreturn_t eata_pio_int_handler(int irq, void *dev_id); + +static irqreturn_t do_eata_pio_int_handler(int irq, void *dev_id) +{ + unsigned long flags; + struct Scsi_Host *dev = dev_id; + irqreturn_t ret; + + spin_lock_irqsave(dev->host_lock, flags); + ret = eata_pio_int_handler(irq, dev_id); + spin_unlock_irqrestore(dev->host_lock, flags); + return ret; +} + +static irqreturn_t eata_pio_int_handler(int irq, void *dev_id) +{ + unsigned int eata_stat = 0xfffff; + struct scsi_cmnd *cmd; + hostdata *hd; + struct eata_ccb *cp; + unsigned long base; + unsigned int x, z; + struct Scsi_Host *sh; + unsigned short zwickel = 0; + unsigned char stat, odd; + irqreturn_t ret = IRQ_NONE; + + for (x = 1, sh = first_HBA; x <= registered_HBAs; x++, sh = SD(sh)->prev) + { + if (sh->irq != irq) + continue; + if (inb(sh->base + HA_RSTATUS) & HA_SBUSY) + continue; + + int_counter++; + ret = IRQ_HANDLED; + + hd = SD(sh); + + cp = &hd->ccb[0]; + cmd = cp->cmd; + base = cmd->device->host->base; + + do { + stat = inb(base + HA_RSTATUS); + if (stat & HA_SDRQ) { + if (cp->DataIn) { + z = 256; + odd = 0; + while ((cmd->SCp.Status) && ((z > 0) || (odd))) { + if (odd) { + *(cmd->SCp.ptr) = zwickel >> 8; + IncStat(&cmd->SCp, 1); + odd = 0; + } + x = min_t(unsigned int, z, cmd->SCp.this_residual / 2); + insw(base + HA_RDATA, cmd->SCp.ptr, x); + z -= x; + IncStat(&cmd->SCp, 2 * x); + if ((z > 0) && (cmd->SCp.this_residual == 1)) { + zwickel = inw(base + HA_RDATA); + *(cmd->SCp.ptr) = zwickel & 0xff; + IncStat(&cmd->SCp, 1); + z--; + odd = 1; + } + } + while (z > 0) { + zwickel = inw(base + HA_RDATA); + z--; + } + } else { /* cp->DataOut */ + + odd = 0; + z = 256; + while ((cmd->SCp.Status) && ((z > 0) || (odd))) { + if (odd) { + zwickel += *(cmd->SCp.ptr) << 8; + IncStat(&cmd->SCp, 1); + outw(zwickel, base + HA_RDATA); + z--; + odd = 0; + } + x = min_t(unsigned int, z, cmd->SCp.this_residual / 2); + outsw(base + HA_RDATA, cmd->SCp.ptr, x); + z -= x; + IncStat(&cmd->SCp, 2 * x); + if ((z > 0) && (cmd->SCp.this_residual == 1)) { + zwickel = *(cmd->SCp.ptr); + zwickel &= 0xff; + IncStat(&cmd->SCp, 1); + odd = 1; + } + } + while (z > 0 || odd) { + outw(zwickel, base + HA_RDATA); + z--; + odd = 0; + } + } + } + } + while ((stat & HA_SDRQ) || ((stat & HA_SMORE) && hd->moresupport)); + + /* terminate handler if HBA goes busy again, i.e. transfers + * more data */ + + if (stat & HA_SBUSY) + break; + + /* OK, this is quite stupid, but I haven't found any correct + * way to get HBA&SCSI status so far */ + + if (!(inb(base + HA_RSTATUS) & HA_SERROR)) { + cmd->result = (DID_OK << 16); + hd->devflags |= (1 << cp->cp_id); + } else if (hd->devflags & (1 << cp->cp_id)) + cmd->result = (DID_OK << 16) + 0x02; + else + cmd->result = (DID_NO_CONNECT << 16); + + if (cp->status == LOCKED) { + cp->status = FREE; + eata_stat = inb(base + HA_RSTATUS); + printk(KERN_CRIT "eata_pio: int_handler, freeing locked " "queueslot\n"); + return ret; + } +#if DBG_INTR2 + if (stat != 0x50) + printk(KERN_DEBUG "stat: %#.2x, result: %#.8x\n", stat, cmd->result); +#endif + + cp->status = FREE; /* now we can release the slot */ + + cmd->scsi_done(cmd); + } + + return ret; +} + +static inline unsigned int eata_pio_send_command(unsigned long base, unsigned char command) +{ + unsigned int loop = 50; + + while (inb(base + HA_RSTATUS) & HA_SBUSY) + if (--loop == 0) + return 1; + + /* Enable interrupts for HBA. It is not the best way to do it at this + * place, but I hope that it doesn't interfere with the IDE driver + * initialization this way */ + + outb(HA_CTRL_8HEADS, base + HA_CTRLREG); + + outb(command, base + HA_WCOMMAND); + return 0; +} + +static int eata_pio_queue_lck(struct scsi_cmnd *cmd, + void (*done)(struct scsi_cmnd *)) +{ + unsigned int x, y; + unsigned long base; + + hostdata *hd; + struct Scsi_Host *sh; + struct eata_ccb *cp; + + queue_counter++; + + hd = HD(cmd); + sh = cmd->device->host; + base = sh->base; + + /* use only slot 0, as 2001 can handle only one cmd at a time */ + + y = x = 0; + + if (hd->ccb[y].status != FREE) { + + DBG(DBG_QUEUE, printk(KERN_EMERG "can_queue %d, x %d, y %d\n", sh->can_queue, x, y)); +#if DEBUG_EATA + panic(KERN_EMERG "eata_pio: run out of queue slots cmdno:%ld " "intrno: %ld\n", queue_counter, int_counter); +#else + panic(KERN_EMERG "eata_pio: run out of queue slots....\n"); +#endif + } + + cp = &hd->ccb[y]; + + memset(cp, 0, sizeof(struct eata_ccb)); + + cp->status = USED; /* claim free slot */ + + DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd, + "eata_pio_queue 0x%p, y %d\n", cmd, y)); + + cmd->scsi_done = (void *) done; + + if (cmd->sc_data_direction == DMA_TO_DEVICE) + cp->DataOut = 1; /* Output mode */ + else + cp->DataIn = 0; /* Input mode */ + + cp->Interpret = (cmd->device->id == hd->hostid); + cp->cp_datalen = cpu_to_be32(scsi_bufflen(cmd)); + cp->Auto_Req_Sen = 0; + cp->cp_reqDMA = 0; + cp->reqlen = 0; + + cp->cp_id = cmd->device->id; + cp->cp_lun = cmd->device->lun; + cp->cp_dispri = 0; + cp->cp_identify = 1; + memcpy(cp->cp_cdb, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd)); + + cp->cp_statDMA = 0; + + cp->cp_viraddr = cp; + cp->cmd = cmd; + cmd->host_scribble = (char *) &hd->ccb[y]; + + if (!scsi_bufflen(cmd)) { + cmd->SCp.buffers_residual = 1; + cmd->SCp.ptr = NULL; + cmd->SCp.this_residual = 0; + cmd->SCp.buffer = NULL; + } else { + cmd->SCp.buffer = scsi_sglist(cmd); + cmd->SCp.buffers_residual = scsi_sg_count(cmd); + cmd->SCp.ptr = sg_virt(cmd->SCp.buffer); + cmd->SCp.this_residual = cmd->SCp.buffer->length; + } + cmd->SCp.Status = (cmd->SCp.this_residual != 0); /* TRUE as long as bytes + * are to transfer */ + + if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) { + cmd->result = DID_BUS_BUSY << 16; + scmd_printk(KERN_NOTICE, cmd, + "eata_pio_queue pid 0x%p, HBA busy, " + "returning DID_BUS_BUSY, done.\n", cmd); + done(cmd); + cp->status = FREE; + return 0; + } + /* FIXME: timeout */ + while (!(inb(base + HA_RSTATUS) & HA_SDRQ)) + cpu_relax(); + outsw(base + HA_RDATA, cp, hd->cplen); + outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND); + for (x = 0; x < hd->cppadlen; x++) + outw(0, base + HA_RDATA); + + DBG(DBG_QUEUE, scmd_printk(KERN_DEBUG, cmd, + "Queued base %#.4lx cmd: 0x%p " + "slot %d irq %d\n", sh->base, cmd, y, sh->irq)); + + return 0; +} + +static DEF_SCSI_QCMD(eata_pio_queue) + +static int eata_pio_abort(struct scsi_cmnd *cmd) +{ + unsigned int loop = 100; + + DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd, + "eata_pio_abort called pid: 0x%p\n", cmd)); + + while (inb(cmd->device->host->base + HA_RAUXSTAT) & HA_ABUSY) + if (--loop == 0) { + printk(KERN_WARNING "eata_pio: abort, timeout error.\n"); + return FAILED; + } + if (CD(cmd)->status == FREE) { + DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_NOT_RUNNING\n")); + return FAILED; + } + if (CD(cmd)->status == USED) { + DBG(DBG_ABNORM, printk(KERN_WARNING "Returning: SCSI_ABORT_BUSY\n")); + /* We want to sleep a bit more here */ + return FAILED; /* SNOOZE */ + } + if (CD(cmd)->status == RESET) { + printk(KERN_WARNING "eata_pio: abort, command reset error.\n"); + return FAILED; + } + if (CD(cmd)->status == LOCKED) { + DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio: abort, queue slot " "locked.\n")); + return FAILED; + } + panic("eata_pio: abort: invalid slot status\n"); +} + +static int eata_pio_host_reset(struct scsi_cmnd *cmd) +{ + unsigned int x, limit = 0; + unsigned char success = 0; + struct scsi_cmnd *sp; + struct Scsi_Host *host = cmd->device->host; + + DBG(DBG_ABNORM, scmd_printk(KERN_WARNING, cmd, + "eata_pio_reset called\n")); + + spin_lock_irq(host->host_lock); + + if (HD(cmd)->state == RESET) { + printk(KERN_WARNING "eata_pio_reset: exit, already in reset.\n"); + spin_unlock_irq(host->host_lock); + return FAILED; + } + + /* force all slots to be free */ + + for (x = 0; x < cmd->device->host->can_queue; x++) { + + if (HD(cmd)->ccb[x].status == FREE) + continue; + + sp = HD(cmd)->ccb[x].cmd; + HD(cmd)->ccb[x].status = RESET; + printk(KERN_WARNING "eata_pio_reset: slot %d in reset.\n", x); + + if (sp == NULL) + panic("eata_pio_reset: slot %d, sp==NULL.\n", x); + } + + /* hard reset the HBA */ + outb(EATA_CMD_RESET, cmd->device->host->base + HA_WCOMMAND); + + DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: board reset done.\n")); + HD(cmd)->state = RESET; + + spin_unlock_irq(host->host_lock); + msleep(3000); + spin_lock_irq(host->host_lock); + + DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: interrupts disabled, " "loops %d.\n", limit)); + + for (x = 0; x < cmd->device->host->can_queue; x++) { + + /* Skip slots already set free by interrupt */ + if (HD(cmd)->ccb[x].status != RESET) + continue; + + sp = HD(cmd)->ccb[x].cmd; + sp->result = DID_RESET << 16; + + /* This mailbox is terminated */ + printk(KERN_WARNING "eata_pio_reset: reset ccb %d.\n", x); + HD(cmd)->ccb[x].status = FREE; + + sp->scsi_done(sp); + } + + HD(cmd)->state = 0; + + spin_unlock_irq(host->host_lock); + + if (success) { /* hmmm... */ + DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, success.\n")); + return SUCCESS; + } else { + DBG(DBG_ABNORM, printk(KERN_WARNING "eata_pio_reset: exit, wakeup.\n")); + return FAILED; + } +} + +static char *get_pio_board_data(unsigned long base, unsigned int irq, unsigned int id, unsigned long cplen, unsigned short cppadlen) +{ + struct eata_ccb cp; + static char buff[256]; + int z; + + memset(&cp, 0, sizeof(struct eata_ccb)); + memset(buff, 0, sizeof(buff)); + + cp.DataIn = 1; + cp.Interpret = 1; /* Interpret command */ + + cp.cp_datalen = cpu_to_be32(254); + cp.cp_dataDMA = cpu_to_be32(0); + + cp.cp_id = id; + cp.cp_lun = 0; + + cp.cp_cdb[0] = INQUIRY; + cp.cp_cdb[1] = 0; + cp.cp_cdb[2] = 0; + cp.cp_cdb[3] = 0; + cp.cp_cdb[4] = 254; + cp.cp_cdb[5] = 0; + + if (eata_pio_send_command(base, EATA_CMD_PIO_SEND_CP)) + return NULL; + + while (!(inb(base + HA_RSTATUS) & HA_SDRQ)) + cpu_relax(); + + outsw(base + HA_RDATA, &cp, cplen); + outb(EATA_CMD_PIO_TRUNC, base + HA_WCOMMAND); + for (z = 0; z < cppadlen; z++) + outw(0, base + HA_RDATA); + + while (inb(base + HA_RSTATUS) & HA_SBUSY) + cpu_relax(); + + if (inb(base + HA_RSTATUS) & HA_SERROR) + return NULL; + else if (!(inb(base + HA_RSTATUS) & HA_SDRQ)) + return NULL; + else { + insw(base + HA_RDATA, &buff, 127); + while (inb(base + HA_RSTATUS) & HA_SDRQ) + inw(base + HA_RDATA); + return buff; + } +} + +static int get_pio_conf_PIO(unsigned long base, struct get_conf *buf) +{ + unsigned long loop = HZ / 2; + int z; + unsigned short *p; + + if (!request_region(base, 9, "eata_pio")) + return 0; + + memset(buf, 0, sizeof(struct get_conf)); + + while (inb(base + HA_RSTATUS) & HA_SBUSY) + if (--loop == 0) + goto fail; + + DBG(DBG_PIO && DBG_PROBE, printk(KERN_DEBUG "Issuing PIO READ CONFIG to HBA at %#lx\n", base)); + eata_pio_send_command(base, EATA_CMD_PIO_READ_CONFIG); + + loop = 50; + for (p = (unsigned short *) buf; (long) p <= ((long) buf + (sizeof(struct get_conf) / 2)); p++) { + while (!(inb(base + HA_RSTATUS) & HA_SDRQ)) + if (--loop == 0) + goto fail; + + loop = 50; + *p = inw(base + HA_RDATA); + } + if (inb(base + HA_RSTATUS) & HA_SERROR) { + DBG(DBG_PROBE, printk("eata_dma: get_conf_PIO, error during " + "transfer for HBA at %lx\n", base)); + goto fail; + } + + if (cpu_to_be32(EATA_SIGNATURE) != buf->signature) + goto fail; + + DBG(DBG_PIO && DBG_PROBE, printk(KERN_NOTICE "EATA Controller found " + "at %#4lx EATA Level: %x\n", + base, (unsigned int) (buf->version))); + + while (inb(base + HA_RSTATUS) & HA_SDRQ) + inw(base + HA_RDATA); + + if (!ALLOW_DMA_BOARDS) { + for (z = 0; z < MAXISA; z++) + if (base == ISAbases[z]) { + buf->IRQ = ISAirqs[z]; + break; + } + } + + return 1; + + fail: + release_region(base, 9); + return 0; +} + +static void print_pio_config(struct get_conf *gc) +{ + printk("Please check values: (read config data)\n"); + printk("LEN: %d ver:%d OCS:%d TAR:%d TRNXFR:%d MORES:%d\n", be32_to_cpu(gc->len), gc->version, gc->OCS_enabled, gc->TAR_support, gc->TRNXFR, gc->MORE_support); + printk("HAAV:%d SCSIID0:%d ID1:%d ID2:%d QUEUE:%d SG:%d SEC:%d\n", gc->HAA_valid, gc->scsi_id[3], gc->scsi_id[2], gc->scsi_id[1], be16_to_cpu(gc->queuesiz), be16_to_cpu(gc->SGsiz), gc->SECOND); + printk("IRQ:%d IRQT:%d FORCADR:%d MCH:%d RIDQ:%d\n", gc->IRQ, gc->IRQ_TR, gc->FORCADR, gc->MAX_CHAN, gc->ID_qest); +} + +static unsigned int print_selftest(unsigned int base) +{ + unsigned char buffer[512]; +#ifdef VERBOSE_SETUP + int z; +#endif + + printk("eata_pio: executing controller self test & setup...\n"); + while (inb(base + HA_RSTATUS) & HA_SBUSY); + outb(EATA_CMD_PIO_SETUPTEST, base + HA_WCOMMAND); + do { + while (inb(base + HA_RSTATUS) & HA_SBUSY) + /* nothing */ ; + if (inb(base + HA_RSTATUS) & HA_SDRQ) { + insw(base + HA_RDATA, &buffer, 256); +#ifdef VERBOSE_SETUP + /* no beeps please... */ + for (z = 0; z < 511 && buffer[z]; z++) + if (buffer[z] != 7) + printk("%c", buffer[z]); +#endif + } + } while (inb(base + HA_RSTATUS) & (HA_SBUSY | HA_SDRQ)); + + return (!(inb(base + HA_RSTATUS) & HA_SERROR)); +} + +static int register_pio_HBA(long base, struct get_conf *gc, struct pci_dev *pdev) +{ + unsigned long size = 0; + char *buff; + unsigned long cplen; + unsigned short cppadlen; + struct Scsi_Host *sh; + hostdata *hd; + + DBG(DBG_REGISTER, print_pio_config(gc)); + + if (gc->DMA_support) { + printk("HBA at %#.4lx supports DMA. Please use EATA-DMA driver.\n", base); + if (!ALLOW_DMA_BOARDS) + return 0; + } + + if ((buff = get_pio_board_data(base, gc->IRQ, gc->scsi_id[3], cplen = (cpu_to_be32(gc->cplen) + 1) / 2, cppadlen = (cpu_to_be16(gc->cppadlen) + 1) / 2)) == NULL) { + printk("HBA at %#lx didn't react on INQUIRY. Sorry.\n", base); + return 0; + } + + if (!print_selftest(base) && !ALLOW_DMA_BOARDS) { + printk("HBA at %#lx failed while performing self test & setup.\n", base); + return 0; + } + + size = sizeof(hostdata) + (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz)); + + sh = scsi_register(&driver_template, size); + if (sh == NULL) + return 0; + + if (!reg_IRQ[gc->IRQ]) { /* Interrupt already registered ? */ + if (!request_irq(gc->IRQ, do_eata_pio_int_handler, 0, "EATA-PIO", sh)) { + reg_IRQ[gc->IRQ]++; + if (!gc->IRQ_TR) + reg_IRQL[gc->IRQ] = 1; /* IRQ is edge triggered */ + } else { + printk("Couldn't allocate IRQ %d, Sorry.\n", gc->IRQ); + return 0; + } + } else { /* More than one HBA on this IRQ */ + if (reg_IRQL[gc->IRQ]) { + printk("Can't support more than one HBA on this IRQ,\n" " if the IRQ is edge triggered. Sorry.\n"); + return 0; + } else + reg_IRQ[gc->IRQ]++; + } + + hd = SD(sh); + + memset(hd->ccb, 0, (sizeof(struct eata_ccb) * be16_to_cpu(gc->queuesiz))); + memset(hd->reads, 0, sizeof(hd->reads)); + + strlcpy(SD(sh)->vendor, &buff[8], sizeof(SD(sh)->vendor)); + strlcpy(SD(sh)->name, &buff[16], sizeof(SD(sh)->name)); + SD(sh)->revision[0] = buff[32]; + SD(sh)->revision[1] = buff[33]; + SD(sh)->revision[2] = buff[34]; + SD(sh)->revision[3] = '.'; + SD(sh)->revision[4] = buff[35]; + SD(sh)->revision[5] = 0; + + switch (be32_to_cpu(gc->len)) { + case 0x1c: + SD(sh)->EATA_revision = 'a'; + break; + case 0x1e: + SD(sh)->EATA_revision = 'b'; + break; + case 0x22: + SD(sh)->EATA_revision = 'c'; + break; + case 0x24: + SD(sh)->EATA_revision = 'z'; + default: + SD(sh)->EATA_revision = '?'; + } + + if (be32_to_cpu(gc->len) >= 0x22) { + if (gc->is_PCI) + hd->bustype = IS_PCI; + else if (gc->is_EISA) + hd->bustype = IS_EISA; + else + hd->bustype = IS_ISA; + } else { + if (buff[21] == '4') + hd->bustype = IS_PCI; + else if (buff[21] == '2') + hd->bustype = IS_EISA; + else + hd->bustype = IS_ISA; + } + + SD(sh)->cplen = cplen; + SD(sh)->cppadlen = cppadlen; + SD(sh)->hostid = gc->scsi_id[3]; + SD(sh)->devflags = 1 << gc->scsi_id[3]; + SD(sh)->moresupport = gc->MORE_support; + sh->unique_id = base; + sh->base = base; + sh->io_port = base; + sh->n_io_port = 9; + sh->irq = gc->IRQ; + sh->dma_channel = PIO; + sh->this_id = gc->scsi_id[3]; + sh->can_queue = 1; + sh->cmd_per_lun = 1; + sh->sg_tablesize = SG_ALL; + + hd->channel = 0; + + hd->pdev = pci_dev_get(pdev); /* Keep a PCI reference */ + + sh->max_id = 8; + sh->max_lun = 8; + + if (gc->SECOND) + hd->primary = 0; + else + hd->primary = 1; + + hd->next = NULL; /* build a linked list of all HBAs */ + hd->prev = last_HBA; + if (hd->prev != NULL) + SD(hd->prev)->next = sh; + last_HBA = sh; + if (first_HBA == NULL) + first_HBA = sh; + registered_HBAs++; + return (1); +} + +static void find_pio_ISA(struct get_conf *buf) +{ + int i; + + for (i = 0; i < MAXISA; i++) { + if (!ISAbases[i]) + continue; + if (!get_pio_conf_PIO(ISAbases[i], buf)) + continue; + if (!register_pio_HBA(ISAbases[i], buf, NULL)) + release_region(ISAbases[i], 9); + else + ISAbases[i] = 0; + } + return; +} + +static void find_pio_EISA(struct get_conf *buf) +{ + u32 base; + int i; + +#ifdef CHECKPAL + u8 pal1, pal2, pal3; +#endif + + for (i = 0; i < MAXEISA; i++) { + if (EISAbases[i]) { /* Still a possibility ? */ + + base = 0x1c88 + (i * 0x1000); +#ifdef CHECKPAL + pal1 = inb((u16) base - 8); + pal2 = inb((u16) base - 7); + pal3 = inb((u16) base - 6); + + if (((pal1 == 0x12) && (pal2 == 0x14)) || ((pal1 == 0x38) && (pal2 == 0xa3) && (pal3 == 0x82)) || ((pal1 == 0x06) && (pal2 == 0x94) && (pal3 == 0x24))) { + DBG(DBG_PROBE, printk(KERN_NOTICE "EISA EATA id tags found: " "%x %x %x \n", (int) pal1, (int) pal2, (int) pal3)); +#endif + if (get_pio_conf_PIO(base, buf)) { + DBG(DBG_PROBE && DBG_EISA, print_pio_config(buf)); + if (buf->IRQ) { + if (!register_pio_HBA(base, buf, NULL)) + release_region(base, 9); + } else { + printk(KERN_NOTICE "eata_dma: No valid IRQ. HBA " "removed from list\n"); + release_region(base, 9); + } + } + /* Nothing found here so we take it from the list */ + EISAbases[i] = 0; +#ifdef CHECKPAL + } +#endif + } + } + return; +} + +static void find_pio_PCI(struct get_conf *buf) +{ +#ifndef CONFIG_PCI + printk("eata_dma: kernel PCI support not enabled. Skipping scan for PCI HBAs.\n"); +#else + struct pci_dev *dev = NULL; + unsigned long base, x; + + while ((dev = pci_get_device(PCI_VENDOR_ID_DPT, PCI_DEVICE_ID_DPT, dev)) != NULL) { + DBG(DBG_PROBE && DBG_PCI, printk("eata_pio: find_PCI, HBA at %s\n", pci_name(dev))); + if (pci_enable_device(dev)) + continue; + pci_set_master(dev); + base = pci_resource_flags(dev, 0); + if (base & IORESOURCE_MEM) { + printk("eata_pio: invalid base address of device %s\n", pci_name(dev)); + continue; + } + base = pci_resource_start(dev, 0); + /* EISA tag there ? */ + if ((inb(base) == 0x12) && (inb(base + 1) == 0x14)) + continue; /* Jep, it's forced, so move on */ + base += 0x10; /* Now, THIS is the real address */ + if (base != 0x1f8) { + /* We didn't find it in the primary search */ + if (get_pio_conf_PIO(base, buf)) { + if (buf->FORCADR) { /* If the address is forced */ + release_region(base, 9); + continue; /* we'll find it later */ + } + + /* OK. We made it till here, so we can go now + * and register it. We only have to check and + * eventually remove it from the EISA and ISA list + */ + + if (!register_pio_HBA(base, buf, dev)) { + release_region(base, 9); + continue; + } + + if (base < 0x1000) { + for (x = 0; x < MAXISA; ++x) { + if (ISAbases[x] == base) { + ISAbases[x] = 0; + break; + } + } + } else if ((base & 0x0fff) == 0x0c88) { + x = (base >> 12) & 0x0f; + EISAbases[x] = 0; + } + } +#ifdef CHECK_BLINK + else if (check_blink_state(base)) { + printk("eata_pio: HBA is in BLINK state.\n" "Consult your HBAs manual to correct this.\n"); + } +#endif + } + } +#endif /* #ifndef CONFIG_PCI */ +} + +static int eata_pio_detect(struct scsi_host_template *tpnt) +{ + struct Scsi_Host *HBA_ptr; + struct get_conf gc; + int i; + + find_pio_PCI(&gc); + find_pio_EISA(&gc); + find_pio_ISA(&gc); + + for (i = 0; i < MAXIRQ; i++) + if (reg_IRQ[i]) + request_irq(i, do_eata_pio_int_handler, 0, "EATA-PIO", NULL); + + HBA_ptr = first_HBA; + + if (registered_HBAs != 0) { + printk("EATA (Extended Attachment) PIO driver version: %d.%d%s\n" + "(c) 1993-95 Michael Neuffer, neuffer@goofy.zdv.uni-mainz.de\n" " Alfred Arnold, a.arnold@kfa-juelich.de\n" "This release only supports DASD devices (harddisks)\n", VER_MAJOR, VER_MINOR, VER_SUB); + + printk("Registered HBAs:\n"); + printk("HBA no. Boardtype: Revis: EATA: Bus: BaseIO: IRQ: Ch: ID: Pr:" " QS: SG: CPL:\n"); + for (i = 1; i <= registered_HBAs; i++) { + printk("scsi%-2d: %.10s v%s 2.0%c %s %#.4lx %2d %d %d %c" + " %2d %2d %2d\n", + HBA_ptr->host_no, SD(HBA_ptr)->name, SD(HBA_ptr)->revision, + SD(HBA_ptr)->EATA_revision, (SD(HBA_ptr)->bustype == 'P') ? + "PCI " : (SD(HBA_ptr)->bustype == 'E') ? "EISA" : "ISA ", + HBA_ptr->base, HBA_ptr->irq, SD(HBA_ptr)->channel, HBA_ptr->this_id, + SD(HBA_ptr)->primary ? 'Y' : 'N', HBA_ptr->can_queue, + HBA_ptr->sg_tablesize, HBA_ptr->cmd_per_lun); + HBA_ptr = SD(HBA_ptr)->next; + } + } + return (registered_HBAs); +} + +static struct scsi_host_template driver_template = { + .proc_name = "eata_pio", + .name = "EATA (Extended Attachment) PIO driver", + .show_info = eata_pio_show_info, + .detect = eata_pio_detect, + .release = eata_pio_release, + .queuecommand = eata_pio_queue, + .eh_abort_handler = eata_pio_abort, + .eh_host_reset_handler = eata_pio_host_reset, + .use_clustering = ENABLE_CLUSTERING, +}; + +MODULE_AUTHOR("Michael Neuffer, Alfred Arnold"); +MODULE_DESCRIPTION("EATA SCSI PIO driver"); +MODULE_LICENSE("GPL"); + +#include "scsi_module.c" |