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Release 4.14 drivers/scsi/aha1542.c

Directory: drivers/scsi
/*
 *  Driver for Adaptec AHA-1542 SCSI host adapters
 *
 *  Copyright (C) 1992  Tommy Thorn
 *  Copyright (C) 1993, 1994, 1995 Eric Youngdale
 *  Copyright (C) 2015 Ondrej Zary
 */

#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/isa.h>
#include <linux/pnp.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <asm/dma.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include "aha1542.h"


#define MAXBOARDS 4


static bool isapnp = 1;
module_param(isapnp, bool, 0);
MODULE_PARM_DESC(isapnp, "enable PnP support (default=1)");


static int io[MAXBOARDS] = { 0x330, 0x334, 0, 0 };
module_param_hw_array(io, int, ioport, NULL, 0);
MODULE_PARM_DESC(io, "base IO address of controller (0x130,0x134,0x230,0x234,0x330,0x334, default=0x330,0x334)");

/* time AHA spends on the AT-bus during data transfer */

static int bus_on[MAXBOARDS] = { -1, -1, -1, -1 }; 
/* power-on default: 11us */
module_param_array(bus_on, int, NULL, 0);
MODULE_PARM_DESC(bus_on, "bus on time [us] (2-15, default=-1 [HW default: 11])");

/* time AHA spends off the bus (not to monopolize it) during data transfer  */

static int bus_off[MAXBOARDS] = { -1, -1, -1, -1 }; 
/* power-on default: 4us */
module_param_array(bus_off, int, NULL, 0);
MODULE_PARM_DESC(bus_off, "bus off time [us] (1-64, default=-1 [HW default: 4])");

/* default is jumper selected (J1 on 1542A), factory default = 5 MB/s */

static int dma_speed[MAXBOARDS] = { -1, -1, -1, -1 };
module_param_array(dma_speed, int, NULL, 0);
MODULE_PARM_DESC(dma_speed, "DMA speed [MB/s] (5,6,7,8,10, default=-1 [by jumper])");


#define BIOS_TRANSLATION_6432 1	
/* Default case these days */

#define BIOS_TRANSLATION_25563 2	
/* Big disk case */


struct aha1542_hostdata {
	/* This will effectively start both of them at the first mailbox */
	
int bios_translation;	/* Mapping bios uses - for compatibility */
	
int aha1542_last_mbi_used;
	
int aha1542_last_mbo_used;
	
struct scsi_cmnd *int_cmds[AHA1542_MAILBOXES];
	
struct mailbox mb[2 * AHA1542_MAILBOXES];
	
struct ccb ccb[AHA1542_MAILBOXES];
};


static inline void aha1542_intr_reset(u16 base) { outb(IRST, CONTROL(base)); }

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Ondrej Zary1680.00%133.33%
Linus Torvalds (pre-git)420.00%266.67%
Total20100.00%3100.00%


static inline bool wait_mask(u16 port, u8 mask, u8 allof, u8 noneof, int timeout) { bool delayed = true; if (timeout == 0) { timeout = 3000000; delayed = false; } while (1) { u8 bits = inb(port) & mask; if ((bits & allof) == allof && ((bits & noneof) == 0)) break; if (delayed) mdelay(1); if (--timeout == 0) return false; } return true; }

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Ondrej Zary8886.27%133.33%
Linus Torvalds (pre-git)1413.73%266.67%
Total102100.00%3100.00%


static int aha1542_outb(unsigned int base, u8 val) { if (!wait_mask(STATUS(base), CDF, 0, CDF, 0)) return 1; outb(val, DATA(base)); return 0; }

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Linus Torvalds (pre-git)3470.83%342.86%
Ondrej Zary1429.17%457.14%
Total48100.00%7100.00%


static int aha1542_out(unsigned int base, u8 *buf, int len) { while (len--) { if (!wait_mask(STATUS(base), CDF, 0, CDF, 0)) return 1; outb(*buf++, DATA(base)); } if (!wait_mask(INTRFLAGS(base), INTRMASK, HACC, 0, 0)) return 1; return 0; }

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Ondrej Zary4857.83%457.14%
Linus Torvalds (pre-git)3542.17%342.86%
Total83100.00%7100.00%

/* Only used at boot time, so we do not need to worry about latency as much here */
static int aha1542_in(unsigned int base, u8 *buf, int len, int timeout) { while (len--) { if (!wait_mask(STATUS(base), DF, DF, 0, timeout)) return 1; *buf++ = inb(DATA(base)); } return 0; }

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Linus Torvalds (pre-git)3554.69%228.57%
Ondrej Zary2945.31%571.43%
Total64100.00%7100.00%


static int makecode(unsigned hosterr, unsigned scsierr) { switch (hosterr) { case 0x0: case 0xa: /* Linked command complete without error and linked normally */ case 0xb: /* Linked command complete without error, interrupt generated */ hosterr = 0; break; case 0x11: /* Selection time out-The initiator selection or target reselection was not complete within the SCSI Time out period */ hosterr = DID_TIME_OUT; break; case 0x12: /* Data overrun/underrun-The target attempted to transfer more data than was allocated by the Data Length field or the sum of the Scatter / Gather Data Length fields. */ case 0x13: /* Unexpected bus free-The target dropped the SCSI BSY at an unexpected time. */ case 0x15: /* MBO command was not 00, 01 or 02-The first byte of the CB was invalid. This usually indicates a software failure. */ case 0x16: /* Invalid CCB Operation Code-The first byte of the CCB was invalid. This usually indicates a software failure. */ case 0x17: /* Linked CCB does not have the same LUN-A subsequent CCB of a set of linked CCB's does not specify the same logical unit number as the first. */ case 0x18: /* Invalid Target Direction received from Host-The direction of a Target Mode CCB was invalid. */ case 0x19: /* Duplicate CCB Received in Target Mode-More than once CCB was received to service data transfer between the same target LUN and initiator SCSI ID in the same direction. */ case 0x1a: /* Invalid CCB or Segment List Parameter-A segment list with a zero length segment or invalid segment list boundaries was received. A CCB parameter was invalid. */ #ifdef DEBUG printk("Aha1542: %x %x\n", hosterr, scsierr); #endif hosterr = DID_ERROR; /* Couldn't find any better */ break; case 0x14: /* Target bus phase sequence failure-An invalid bus phase or bus phase sequence was requested by the target. The host adapter will generate a SCSI Reset Condition, notifying the host with a SCRD interrupt */ hosterr = DID_RESET; break; default: printk(KERN_ERR "aha1542: makecode: unknown hoststatus %x\n", hosterr); break; } return scsierr | (hosterr << 16); }

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Linus Torvalds (pre-git)11895.93%375.00%
Ondrej Zary54.07%125.00%
Total123100.00%4100.00%


static int aha1542_test_port(struct Scsi_Host *sh) { u8 inquiry_result[4]; int i; /* Quick and dirty test for presence of the card. */ if (inb(STATUS(sh->io_port)) == 0xff) return 0; /* Reset the adapter. I ought to make a hard reset, but it's not really necessary */ /* In case some other card was probing here, reset interrupts */ aha1542_intr_reset(sh->io_port); /* reset interrupts, so they don't block */ outb(SRST | IRST /*|SCRST */ , CONTROL(sh->io_port)); mdelay(20); /* Wait a little bit for things to settle down. */ /* Expect INIT and IDLE, any of the others are bad */ if (!wait_mask(STATUS(sh->io_port), STATMASK, INIT | IDLE, STST | DIAGF | INVDCMD | DF | CDF, 0)) return 0; /* Shouldn't have generated any interrupts during reset */ if (inb(INTRFLAGS(sh->io_port)) & INTRMASK) return 0; /* Perform a host adapter inquiry instead so we do not need to set up the mailboxes ahead of time */ aha1542_outb(sh->io_port, CMD_INQUIRY); for (i = 0; i < 4; i++) { if (!wait_mask(STATUS(sh->io_port), DF, DF, 0, 0)) return 0; inquiry_result[i] = inb(DATA(sh->io_port)); } /* Reading port should reset DF */ if (inb(STATUS(sh->io_port)) & DF) return 0; /* When HACC, command is completed, and we're though testing */ if (!wait_mask(INTRFLAGS(sh->io_port), HACC, HACC, 0, 0)) return 0; /* Clear interrupts */ outb(IRST, CONTROL(sh->io_port)); return 1; }

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Linus Torvalds (pre-git)15563.27%952.94%
Ondrej Zary9036.73%847.06%
Total245100.00%17100.00%


static irqreturn_t aha1542_interrupt(int irq, void *dev_id) { struct Scsi_Host *sh = dev_id; struct aha1542_hostdata *aha1542 = shost_priv(sh); void (*my_done)(struct scsi_cmnd *) = NULL; int errstatus, mbi, mbo, mbistatus; int number_serviced; unsigned long flags; struct scsi_cmnd *tmp_cmd; int flag; struct mailbox *mb = aha1542->mb; struct ccb *ccb = aha1542->ccb; #ifdef DEBUG { flag = inb(INTRFLAGS(sh->io_port)); shost_printk(KERN_DEBUG, sh, "aha1542_intr_handle: "); if (!(flag & ANYINTR)) printk("no interrupt?"); if (flag & MBIF) printk("MBIF "); if (flag & MBOA) printk("MBOF "); if (flag & HACC) printk("HACC "); if (flag & SCRD) printk("SCRD "); printk("status %02x\n", inb(STATUS(sh->io_port))); }; #endif number_serviced = 0; spin_lock_irqsave(sh->host_lock, flags); while (1) { flag = inb(INTRFLAGS(sh->io_port)); /* Check for unusual interrupts. If any of these happen, we should probably do something special, but for now just printing a message is sufficient. A SCSI reset detected is something that we really need to deal with in some way. */ if (flag & ~MBIF) { if (flag & MBOA) printk("MBOF "); if (flag & HACC) printk("HACC "); if (flag & SCRD) printk("SCRD "); } aha1542_intr_reset(sh->io_port); mbi = aha1542->aha1542_last_mbi_used + 1; if (mbi >= 2 * AHA1542_MAILBOXES) mbi = AHA1542_MAILBOXES; do { if (mb[mbi].status != 0) break; mbi++; if (mbi >= 2 * AHA1542_MAILBOXES) mbi = AHA1542_MAILBOXES; } while (mbi != aha1542->aha1542_last_mbi_used); if (mb[mbi].status == 0) { spin_unlock_irqrestore(sh->host_lock, flags); /* Hmm, no mail. Must have read it the last time around */ if (!number_serviced) shost_printk(KERN_WARNING, sh, "interrupt received, but no mail.\n"); return IRQ_HANDLED; }; mbo = (scsi2int(mb[mbi].ccbptr) - (isa_virt_to_bus(&ccb[0]))) / sizeof(struct ccb); mbistatus = mb[mbi].status; mb[mbi].status = 0; aha1542->aha1542_last_mbi_used = mbi; #ifdef DEBUG if (ccb[mbo].tarstat | ccb[mbo].hastat) shost_printk(KERN_DEBUG, sh, "aha1542_command: returning %x (status %d)\n", ccb[mbo].tarstat + ((int) ccb[mbo].hastat << 16), mb[mbi].status); #endif if (mbistatus == 3) continue; /* Aborted command not found */ #ifdef DEBUG shost_printk(KERN_DEBUG, sh, "...done %d %d\n", mbo, mbi); #endif tmp_cmd = aha1542->int_cmds[mbo]; if (!tmp_cmd || !tmp_cmd->scsi_done) { spin_unlock_irqrestore(sh->host_lock, flags); shost_printk(KERN_WARNING, sh, "Unexpected interrupt\n"); shost_printk(KERN_WARNING, sh, "tarstat=%x, hastat=%x idlun=%x ccb#=%d\n", ccb[mbo].tarstat, ccb[mbo].hastat, ccb[mbo].idlun, mbo); return IRQ_HANDLED; } my_done = tmp_cmd->scsi_done; kfree(tmp_cmd->host_scribble); tmp_cmd->host_scribble = NULL; /* Fetch the sense data, and tuck it away, in the required slot. The Adaptec automatically fetches it, and there is no guarantee that we will still have it in the cdb when we come back */ if (ccb[mbo].tarstat == 2) memcpy(tmp_cmd->sense_buffer, &ccb[mbo].cdb[ccb[mbo].cdblen], SCSI_SENSE_BUFFERSIZE); /* is there mail :-) */ /* more error checking left out here */ if (mbistatus != 1) /* This is surely wrong, but I don't know what's right */ errstatus = makecode(ccb[mbo].hastat, ccb[mbo].tarstat); else errstatus = 0; #ifdef DEBUG if (errstatus) shost_printk(KERN_DEBUG, sh, "(aha1542 error:%x %x %x) ", errstatus, ccb[mbo].hastat, ccb[mbo].tarstat); if (ccb[mbo].tarstat == 2) print_hex_dump_bytes("sense: ", DUMP_PREFIX_NONE, &ccb[mbo].cdb[ccb[mbo].cdblen], 12); if (errstatus) printk("aha1542_intr_handle: returning %6x\n", errstatus); #endif tmp_cmd->result = errstatus; aha1542->int_cmds[mbo] = NULL; /* This effectively frees up the mailbox slot, as far as queuecommand is concerned */ my_done(tmp_cmd); number_serviced++; }; }

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Linus Torvalds (pre-git)63481.70%1043.48%
Ondrej Zary13317.14%834.78%
Linus Torvalds50.64%28.70%
Douglas Gilbert20.26%14.35%
Al Viro10.13%14.35%
FUJITA Tomonori10.13%14.35%
Total776100.00%23100.00%


static int aha1542_queuecommand(struct Scsi_Host *sh, struct scsi_cmnd *cmd) { struct aha1542_hostdata *aha1542 = shost_priv(sh); u8 direction; u8 target = cmd->device->id; u8 lun = cmd->device->lun; unsigned long flags; int bufflen = scsi_bufflen(cmd); int mbo, sg_count; struct mailbox *mb = aha1542->mb; struct ccb *ccb = aha1542->ccb; struct chain *cptr; if (*cmd->cmnd == REQUEST_SENSE) { /* Don't do the command - we have the sense data already */ cmd->result = 0; cmd->scsi_done(cmd); return 0; } #ifdef DEBUG { int i = -1; if (*cmd->cmnd == READ_10 || *cmd->cmnd == WRITE_10) i = xscsi2int(cmd->cmnd + 2); else if (*cmd->cmnd == READ_6 || *cmd->cmnd == WRITE_6) i = scsi2int(cmd->cmnd + 2); shost_printk(KERN_DEBUG, sh, "aha1542_queuecommand: dev %d cmd %02x pos %d len %d", target, *cmd->cmnd, i, bufflen); print_hex_dump_bytes("command: ", DUMP_PREFIX_NONE, cmd->cmnd, cmd->cmd_len); } #endif if (bufflen) { /* allocate memory before taking host_lock */ sg_count = scsi_sg_count(cmd); cptr = kmalloc(sizeof(*cptr) * sg_count, GFP_KERNEL | GFP_DMA); if (!cptr) return SCSI_MLQUEUE_HOST_BUSY; } else { sg_count = 0; cptr = NULL; } /* Use the outgoing mailboxes in a round-robin fashion, because this is how the host adapter will scan for them */ spin_lock_irqsave(sh->host_lock, flags); mbo = aha1542->aha1542_last_mbo_used + 1; if (mbo >= AHA1542_MAILBOXES) mbo = 0; do { if (mb[mbo].status == 0 && aha1542->int_cmds[mbo] == NULL) break; mbo++; if (mbo >= AHA1542_MAILBOXES) mbo = 0; } while (mbo != aha1542->aha1542_last_mbo_used); if (mb[mbo].status || aha1542->int_cmds[mbo]) panic("Unable to find empty mailbox for aha1542.\n"); aha1542->int_cmds[mbo] = cmd; /* This will effectively prevent someone else from screwing with this cdb. */ aha1542->aha1542_last_mbo_used = mbo; #ifdef DEBUG shost_printk(KERN_DEBUG, sh, "Sending command (%d %p)...", mbo, cmd->scsi_done); #endif any2scsi(mb[mbo].ccbptr, isa_virt_to_bus(&ccb[mbo])); /* This gets trashed for some reason */ memset(&ccb[mbo], 0, sizeof(struct ccb)); ccb[mbo].cdblen = cmd->cmd_len; direction = 0; if (*cmd->cmnd == READ_10 || *cmd->cmnd == READ_6) direction = 8; else if (*cmd->cmnd == WRITE_10 || *cmd->cmnd == WRITE_6) direction = 16; memcpy(ccb[mbo].cdb, cmd->cmnd, ccb[mbo].cdblen); if (bufflen) { struct scatterlist *sg; int i; ccb[mbo].op = 2; /* SCSI Initiator Command w/scatter-gather */ cmd->host_scribble = (void *)cptr; scsi_for_each_sg(cmd, sg, sg_count, i) { any2scsi(cptr[i].dataptr, isa_page_to_bus(sg_page(sg)) + sg->offset); any2scsi(cptr[i].datalen, sg->length); }; any2scsi(ccb[mbo].datalen, sg_count * sizeof(struct chain)); any2scsi(ccb[mbo].dataptr, isa_virt_to_bus(cptr)); #ifdef DEBUG shost_printk(KERN_DEBUG, sh, "cptr %p: ", cptr); print_hex_dump_bytes("cptr: ", DUMP_PREFIX_NONE, cptr, 18); #endif } else { ccb[mbo].op = 0; /* SCSI Initiator Command */ cmd->host_scribble = NULL; any2scsi(ccb[mbo].datalen, 0); any2scsi(ccb[mbo].dataptr, 0); }; ccb[mbo].idlun = (target & 7) << 5 | direction | (lun & 7); /*SCSI Target Id */ ccb[mbo].rsalen = 16; ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0; ccb[mbo].commlinkid = 0; #ifdef DEBUG print_hex_dump_bytes("sending: ", DUMP_PREFIX_NONE, &ccb[mbo], sizeof(ccb[mbo]) - 10); printk("aha1542_queuecommand: now waiting for interrupt "); #endif mb[mbo].status = 1; aha1542_outb(cmd->device->host->io_port, CMD_START_SCSI); spin_unlock_irqrestore(sh->host_lock, flags); return 0; }

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Linus Torvalds (pre-git)57868.73%1339.39%
Ondrej Zary22326.52%1545.45%
Jens Axboe121.43%13.03%
Arnd Bergmann111.31%13.03%
Boaz Harrosh80.95%13.03%
Alan Cox70.83%13.03%
Douglas Gilbert20.24%13.03%
Total841100.00%33100.00%

/* Initialize mailboxes */
static void setup_mailboxes(struct Scsi_Host *sh) { struct aha1542_hostdata *aha1542 = shost_priv(sh); int i; struct mailbox *mb = aha1542->mb; struct ccb *ccb = aha1542->ccb; u8 mb_cmd[5] = { CMD_MBINIT, AHA1542_MAILBOXES, 0, 0, 0}; for (i = 0; i < AHA1542_MAILBOXES; i++) { mb[i].status = mb[AHA1542_MAILBOXES + i].status = 0; any2scsi(mb[i].ccbptr, isa_virt_to_bus(&ccb[i])); }; aha1542_intr_reset(sh->io_port); /* reset interrupts, so they don't block */ any2scsi((mb_cmd + 2), isa_virt_to_bus(mb)); if (aha1542_out(sh->io_port, mb_cmd, 5)) shost_printk(KERN_ERR, sh, "failed setting up mailboxes\n"); aha1542_intr_reset(sh->io_port); }

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Linus Torvalds (pre-git)10262.20%637.50%
Ondrej Zary6237.80%1062.50%
Total164100.00%16100.00%


static int aha1542_getconfig(struct Scsi_Host *sh) { u8 inquiry_result[3]; int i; i = inb(STATUS(sh->io_port)); if (i & DF) { i = inb(DATA(sh->io_port)); }; aha1542_outb(sh->io_port, CMD_RETCONF); aha1542_in(sh->io_port, inquiry_result, 3, 0); if (!wait_mask(INTRFLAGS(sh->io_port), INTRMASK, HACC, 0, 0)) shost_printk(KERN_ERR, sh, "error querying board settings\n"); aha1542_intr_reset(sh->io_port); switch (inquiry_result[0]) { case 0x80: sh->dma_channel = 7; break; case 0x40: sh->dma_channel = 6; break; case 0x20: sh->dma_channel = 5; break; case 0x01: sh->dma_channel = 0; break; case 0: /* This means that the adapter, although Adaptec 1542 compatible, doesn't use a DMA channel. Currently only aware of the BusLogic BT-445S VL-Bus adapter which needs this. */ sh->dma_channel = 0xFF; break; default: shost_printk(KERN_ERR, sh, "Unable to determine DMA channel.\n"); return -1; }; switch (inquiry_result[1]) { case 0x40: sh->irq = 15; break; case 0x20: sh->irq = 14; break; case 0x8: sh->irq = 12; break; case 0x4: sh->irq = 11; break; case 0x2: sh->irq = 10; break; case 0x1: sh->irq = 9; break; default: shost_printk(KERN_ERR, sh, "Unable to determine IRQ level.\n"); return -1; }; sh->this_id = inquiry_result[2] & 7; return 0; }

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Linus Torvalds (pre-git)20070.18%750.00%
Ondrej Zary8529.82%750.00%
Total285100.00%14100.00%

/* This function should only be called for 1542C boards - we can detect the special firmware settings and unlock the board */
static int aha1542_mbenable(struct Scsi_Host *sh) { static u8 mbenable_cmd[3]; static u8 mbenable_result[2]; int retval; retval = BIOS_TRANSLATION_6432; aha1542_outb(sh->io_port, CMD_EXTBIOS); if (aha1542_in(sh->io_port, mbenable_result, 2, 100)) return retval; if (!wait_mask(INTRFLAGS(sh->io_port), INTRMASK, HACC, 0, 100)) goto fail; aha1542_intr_reset(sh->io_port); if ((mbenable_result[0] & 0x08) || mbenable_result[1]) { mbenable_cmd[0] = CMD_MBENABLE; mbenable_cmd[1] = 0; mbenable_cmd[2] = mbenable_result[1]; if ((mbenable_result[0] & 0x08) && (mbenable_result[1] & 0x03)) retval = BIOS_TRANSLATION_25563; if (aha1542_out(sh->io_port, mbenable_cmd, 3)) goto fail; }; while (0) { fail: shost_printk(KERN_ERR, sh, "Mailbox init failed\n"); } aha1542_intr_reset(sh->io_port); return retval; }

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Linus Torvalds (pre-git)15276.00%646.15%
Ondrej Zary4824.00%753.85%
Total200100.00%13100.00%

/* Query the board to find out if it is a 1542 or a 1740, or whatever. */
static int aha1542_query(struct Scsi_Host *sh) { struct aha1542_hostdata *aha1542 = shost_priv(sh); u8 inquiry_result[4]; int i; i = inb(STATUS(sh->io_port)); if (i & DF) { i = inb(DATA(sh->io_port)); }; aha1542_outb(sh->io_port, CMD_INQUIRY); aha1542_in(sh->io_port, inquiry_result, 4, 0); if (!wait_mask(INTRFLAGS(sh->io_port), INTRMASK, HACC, 0, 0)) shost_printk(KERN_ERR, sh, "error querying card type\n"); aha1542_intr_reset(sh->io_port); aha1542->bios_translation = BIOS_TRANSLATION_6432; /* Default case */ /* For an AHA1740 series board, we ignore the board since there is a hardware bug which can lead to wrong blocks being returned if the board is operating in the 1542 emulation mode. Since there is an extended mode driver, we simply ignore the board and let the 1740 driver pick it up. */ if (inquiry_result[0] == 0x43) { shost_printk(KERN_INFO, sh, "Emulation mode not supported for AHA-1740 hardware, use aha1740 driver instead.\n"); return 1; }; /* Always call this - boards that do not support extended bios translation will ignore the command, and we will set the proper default */ aha1542->bios_translation = aha1542_mbenable(sh); return 0; }

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Linus Torvalds (pre-git)10764.07%650.00%
Ondrej Zary6035.93%650.00%
Total167100.00%12100.00%


static u8 dma_speed_hw(int dma_speed) { switch (dma_speed) { case 5: return 0x00; case 6: return 0x04; case 7: return 0x01; case 8: return 0x02; case 10: return 0x03; } return 0xff; /* invalid */ }

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Ondrej Zary4795.92%150.00%
Linus Torvalds24.08%150.00%
Total49100.00%2100.00%

/* Set the Bus on/off-times as not to ruin floppy performance */
static void aha1542_set_bus_times(struct Scsi_Host *sh, int bus_on, int bus_off, int dma_speed) { if (bus_on > 0) { u8 oncmd[] = { CMD_BUSON_TIME, clamp(bus_on, 2, 15) }; aha1542_intr_reset(sh->io_port); if (aha1542_out(sh->io_port, oncmd, 2)) goto fail; } if (bus_off > 0) { u8 offcmd[] = { CMD_BUSOFF_TIME, clamp(bus_off, 1, 64) }; aha1542_intr_reset(sh->io_port); if (aha1542_out(sh->io_port, offcmd, 2)) goto fail; } if (dma_speed_hw(dma_speed) != 0xff) { u8 dmacmd[] = { CMD_DMASPEED, dma_speed_hw(dma_speed) }; aha1542_intr_reset(sh->io_port); if (aha1542_out(sh->io_port, dmacmd, 2)) goto fail; } aha1542_intr_reset(sh->io_port); return; fail: shost_printk(KERN_ERR, sh, "setting bus on/off-time failed\n"); aha1542_intr_reset(sh->io_port); }

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Ondrej Zary11259.26%850.00%
Linus Torvalds (pre-git)7137.57%637.50%
Linus Torvalds52.65%16.25%
Adrian Bunk10.53%16.25%
Total189100.00%16100.00%

/* return non-zero on detection */
static struct Scsi_Host *aha1542_hw_init(struct scsi_host_template *tpnt, struct device *pdev, int indx) { unsigned int base_io = io[indx]; struct Scsi_Host *sh; struct aha1542_hostdata *aha1542; char dma_info[] = "no DMA"; if (base_io == 0) return NULL; if (!request_region(base_io, AHA1542_REGION_SIZE, "aha1542")) return NULL; sh = scsi_host_alloc(tpnt, sizeof(struct aha1542_hostdata)); if (!sh) goto release; aha1542 = shost_priv(sh); sh->unique_id = base_io; sh->io_port = base_io; sh->n_io_port = AHA1542_REGION_SIZE; aha1542->aha1542_last_mbi_used = 2 * AHA1542_MAILBOXES - 1; aha1542->aha1542_last_mbo_used = AHA1542_MAILBOXES - 1; if (!aha1542_test_port(sh)) goto unregister; aha1542_set_bus_times(sh, bus_on[indx], bus_off[indx], dma_speed[indx]); if (aha1542_query(sh)) goto unregister; if (aha1542_getconfig(sh) == -1) goto unregister; if (sh->dma_channel != 0xFF) snprintf(dma_info, sizeof(dma_info), "DMA %d", sh->dma_channel); shost_printk(KERN_INFO, sh, "Adaptec AHA-1542 (SCSI-ID %d) at IO 0x%x, IRQ %d, %s\n", sh->this_id, base_io, sh->irq, dma_info); if (aha1542->bios_translation == BIOS_TRANSLATION_25563) shost_printk(KERN_INFO, sh, "Using extended bios translation\n"); setup_mailboxes(sh); if (request_irq(sh->irq, aha1542_interrupt, 0, "aha1542", sh)) { shost_printk(KERN_ERR, sh, "Unable to allocate IRQ.\n"); goto unregister; } if (sh->dma_channel != 0xFF) { if (request_dma(sh->dma_channel, "aha1542")) { shost_printk(KERN_ERR, sh, "Unable to allocate DMA channel.\n"); goto free_irq; } if (sh->dma_channel == 0 || sh->dma_channel >= 5) { set_dma_mode(sh->dma_channel, DMA_MODE_CASCADE); enable_dma(sh->dma_channel); } } if (scsi_add_host(sh, pdev)) goto free_dma; scsi_scan_host(sh); return sh; free_dma: if (sh->dma_channel != 0xff) free_dma(sh->dma_channel); free_irq: free_irq(sh->irq, sh); unregister: scsi_host_put(sh); release: release_region(base_io, AHA1542_REGION_SIZE); return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Ondrej Zary30973.57%942.86%
Linus Torvalds (pre-git)10825.71%1152.38%
Douglas Gilbert30.71%14.76%
Total420100.00%21100.00%


static int aha1542_release(struct Scsi_Host *sh) { scsi_remove_host(sh); if (sh->dma_channel != 0xff) free_dma(sh->dma_channel); if (sh->irq) free_irq(sh->irq, sh); if (sh->io_port && sh->n_io_port) release_region(sh->io_port, sh->n_io_port); scsi_host_put(sh); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Christoph Hellwig4965.33%125.00%
Ondrej Zary2634.67%375.00%
Total75100.00%4100.00%

/* * This is a device reset. This is handled by sending a special command * to the device. */
static int aha1542_dev_reset(struct scsi_cmnd *cmd) { struct Scsi_Host *sh = cmd->device->host; struct aha1542_hostdata *aha1542 = shost_priv(sh); unsigned long flags; struct mailbox *mb = aha1542->mb; u8 target = cmd->device->id; u8 lun = cmd->device->lun; int mbo; struct ccb *ccb = aha1542->ccb; spin_lock_irqsave(sh->host_lock, flags); mbo = aha1542->aha1542_last_mbo_used + 1; if (mbo >= AHA1542_MAILBOXES) mbo = 0; do { if (mb[mbo].status == 0 && aha1542->int_cmds[mbo] == NULL) break; mbo++; if (mbo >= AHA1542_MAILBOXES) mbo = 0; } while (mbo != aha1542->aha1542_last_mbo_used); if (mb[mbo].status || aha1542->int_cmds[mbo]) panic("Unable to find empty mailbox for aha1542.\n"); aha1542->int_cmds[mbo] = cmd; /* This will effectively prevent someone else from screwing with this cdb. */ aha1542->aha1542_last_mbo_used = mbo; any2scsi(mb[mbo].ccbptr, isa_virt_to_bus(&ccb[mbo])); /* This gets trashed for some reason */ memset(&ccb[mbo], 0, sizeof(struct ccb)); ccb[mbo].op = 0x81; /* BUS DEVICE RESET */ ccb[mbo].idlun = (target & 7) << 5 | (lun & 7); /*SCSI Target Id */ ccb[mbo].linkptr[0] = ccb[mbo].linkptr[1] = ccb[mbo].linkptr[2] = 0; ccb[mbo].commlinkid = 0; /* * Now tell the 1542 to flush all pending commands for this * target */ aha1542_outb(sh->io_port, CMD_START_SCSI); spin_unlock_irqrestore(sh->host_lock, flags); scmd_printk(KERN_WARNING, cmd, "Trying device reset for target\n"); return SUCCESS; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)25176.99%216.67%
Ondrej Zary6419.63%650.00%
Alan Cox51.53%18.33%
Jeff Garzik30.92%18.33%
Douglas Gilbert20.61%18.33%
Linus Torvalds10.31%18.33%
Total326100.00%12100.00%


static int aha1542_reset(struct scsi_cmnd *cmd, u8 reset_cmd) { struct Scsi_Host *sh = cmd->device->host; struct aha1542_hostdata *aha1542 = shost_priv(sh); unsigned long flags; int i; spin_lock_irqsave(sh->host_lock, flags); /* * This does a scsi reset for all devices on the bus. * In principle, we could also reset the 1542 - should * we do this? Try this first, and we can add that later * if it turns out to be useful. */ outb(reset_cmd, CONTROL(cmd->device->host->io_port)); if (!wait_mask(STATUS(cmd->device->host->io_port), STATMASK, IDLE, STST | DIAGF | INVDCMD | DF | CDF, 0)) { spin_unlock_irqrestore(sh->host_lock, flags); return FAILED; } /* * We need to do this too before the 1542 can interact with * us again after host reset. */ if (reset_cmd & HRST) setup_mailboxes(cmd->device->host); /* * Now try to pick up the pieces. For all pending commands, * free any internal data structures, and basically clear things * out. We do not try and restart any commands or anything - * the strategy handler takes care of that crap. */ shost_printk(KERN_WARNING, cmd->device->host, "Sent BUS RESET to scsi host %d\n", cmd->device->host->host_no); for (i = 0; i < AHA1542_MAILBOXES; i++) { if (aha1542->int_cmds[i] != NULL) { struct scsi_cmnd *tmp_cmd; tmp_cmd = aha1542->int_cmds[i]; if (tmp_cmd->device->soft_reset) { /* * If this device implements the soft reset option, * then it is still holding onto the command, and * may yet complete it. In this case, we don't * flush the data. */ continue; } kfree(tmp_cmd->host_scribble); tmp_cmd->host_scribble = NULL; aha1542->int_cmds[i] = NULL; aha1542->mb[i].status = 0; } } spin_unlock_irqrestore(sh->host_lock, flags); return SUCCESS; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)13151.98%321.43%
Ondrej Zary10842.86%750.00%
Alan Cox62.38%17.14%
Jeff Garzik51.98%17.14%
Linus Torvalds20.79%214.29%
Total252100.00%14100.00%


static int aha1542_bus_reset(struct scsi_cmnd *cmd) { return aha1542_reset(cmd, SCRST); }

Contributors

PersonTokensPropCommitsCommitProp
Ondrej Zary1157.89%360.00%
Linus Torvalds (pre-git)736.84%120.00%
Linus Torvalds15.26%120.00%
Total19100.00%5100.00%


static int aha1542_host_reset(struct scsi_cmnd *cmd) { return aha1542_reset(cmd, HRST | SCRST); }

Contributors

PersonTokensPropCommitsCommitProp
Ondrej Zary1571.43%250.00%
Linus Torvalds (pre-git)419.05%125.00%
Jeff Garzik29.52%125.00%
Total21100.00%4100.00%


static int aha1542_biosparam(struct scsi_device *sdev, struct block_device *bdev, sector_t capacity, int geom[]) { struct aha1542_hostdata *aha1542 = shost_priv(sdev->host); if (capacity >= 0x200000 && aha1542->bios_translation == BIOS_TRANSLATION_25563) { /* Please verify that this is the same as what DOS returns */ geom[0] = 255; /* heads */ geom[1] = 63; /* sectors */ } else { geom[0] = 64; /* heads */ geom[1] = 32; /* sectors */ } geom[2] = sector_div(capacity, geom[0] * geom[1]); /* cylinders */ return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)5348.62%550.00%
Ondrej Zary4541.28%220.00%
Christoph Hellwig76.42%110.00%
Al Viro32.75%110.00%
Linus Torvalds10.92%110.00%
Total109100.00%10100.00%

MODULE_LICENSE("GPL"); static struct scsi_host_template driver_template = { .module = THIS_MODULE, .proc_name = "aha1542", .name = "Adaptec 1542", .queuecommand = aha1542_queuecommand, .eh_device_reset_handler= aha1542_dev_reset, .eh_bus_reset_handler = aha1542_bus_reset, .eh_host_reset_handler = aha1542_host_reset, .bios_param = aha1542_biosparam, .can_queue = AHA1542_MAILBOXES, .this_id = 7, .sg_tablesize = 16, .unchecked_isa_dma = 1, .use_clustering = ENABLE_CLUSTERING, };
static int aha1542_isa_match(struct device *pdev, unsigned int ndev) { struct Scsi_Host *sh = aha1542_hw_init(&driver_template, pdev, ndev); if (!sh) return 0; dev_set_drvdata(pdev, sh); return 1; }

Contributors

PersonTokensPropCommitsCommitProp
Ondrej Zary48100.00%1100.00%
Total48100.00%1100.00%


static int aha1542_isa_remove(struct device *pdev, unsigned int ndev) { aha1542_release(dev_get_drvdata(pdev)); dev_set_drvdata(pdev, NULL); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Ondrej Zary33100.00%1100.00%
Total33100.00%1100.00%

static struct isa_driver aha1542_isa_driver = { .match = aha1542_isa_match, .remove = aha1542_isa_remove, .driver = { .name = "aha1542" }, }; static int isa_registered; #ifdef CONFIG_PNP static const struct pnp_device_id aha1542_pnp_ids[] = { { .id = "ADP1542" }, { .id = "" } }; MODULE_DEVICE_TABLE(pnp, aha1542_pnp_ids);
static int aha1542_pnp_probe(struct pnp_dev *pdev, const struct pnp_device_id *id) { int indx; struct Scsi_Host *sh; for (indx = 0; indx < ARRAY_SIZE(io); indx++) { if (io[indx]) continue; if (pnp_activate_dev(pdev) < 0) continue; io[indx] = pnp_port_start(pdev, 0); /* The card can be queried for its DMA, we have the DMA set up that is enough */ dev_info(&pdev->dev, "ISAPnP found an AHA1535 at I/O 0x%03X", io[indx]); } sh = aha1542_hw_init(&driver_template, &pdev->dev, indx); if (!sh) return -ENODEV; pnp_set_drvdata(pdev, sh); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Ondrej Zary123100.00%3100.00%
Total123100.00%3100.00%


static void aha1542_pnp_remove(struct pnp_dev *pdev) { aha1542_release(pnp_get_drvdata(pdev)); pnp_set_drvdata(pdev, NULL); }

Contributors

PersonTokensPropCommitsCommitProp
Ondrej Zary26100.00%1100.00%
Total26100.00%1100.00%

static struct pnp_driver aha1542_pnp_driver = { .name = "aha1542", .id_table = aha1542_pnp_ids, .probe = aha1542_pnp_probe, .remove = aha1542_pnp_remove, }; static int pnp_registered; #endif /* CONFIG_PNP */
static int __init aha1542_init(void) { int ret = 0; #ifdef CONFIG_PNP if (isapnp) { ret = pnp_register_driver(&aha1542_pnp_driver); if (!ret) pnp_registered = 1; } #endif ret = isa_register_driver(&aha1542_isa_driver, MAXBOARDS); if (!ret) isa_registered = 1; #ifdef CONFIG_PNP if (pnp_registered) ret = 0; #endif if (isa_registered) ret = 0; return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Ondrej Zary85100.00%1100.00%
Total85100.00%1100.00%


static void __exit aha1542_exit(void) { #ifdef CONFIG_PNP if (pnp_registered) pnp_unregister_driver(&aha1542_pnp_driver); #endif if (isa_registered) isa_unregister_driver(&aha1542_isa_driver); }

Contributors

PersonTokensPropCommitsCommitProp
Ondrej Zary34100.00%1100.00%
Total34100.00%1100.00%

module_init(aha1542_init); module_exit(aha1542_exit);

Overall Contributors

PersonTokensPropCommitsCommitProp
Linus Torvalds (pre-git)294954.55%4443.14%
Ondrej Zary222241.10%3130.39%
Christoph Hellwig1182.18%43.92%
Linus Torvalds220.41%54.90%
Alan Cox180.33%10.98%
Jens Axboe120.22%10.98%
Arnd Bergmann110.20%10.98%
Jeff Garzik100.18%32.94%
Douglas Gilbert90.17%10.98%
Boaz Harrosh80.15%10.98%
Andrew Morton70.13%10.98%
Arnaldo Carvalho de Melo60.11%10.98%
Al Viro40.07%21.96%
David Howells30.06%10.98%
Tejun Heo20.04%10.98%
Adrian Bunk20.04%10.98%
Arvind Yadav10.02%10.98%
Arjan van de Ven10.02%10.98%
FUJITA Tomonori10.02%10.98%
Total5406100.00%102100.00%
Directory: drivers/scsi
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