acf3368ffb
The module.h header was implicitly present everywhere, so files with no explicit include of the module infrastructure would build anyway. We are now removing the implicit include, and so we need to call out the module.h file that we need explicitly. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
282 lines
6.5 KiB
C
282 lines
6.5 KiB
C
#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/mm.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/zorro.h>
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#include <linux/module.h>
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#include <asm/page.h>
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#include <asm/pgtable.h>
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#include <asm/amigaints.h>
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#include <asm/amigahw.h>
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#include "scsi.h"
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#include "wd33c93.h"
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#include "a2091.h"
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struct a2091_hostdata {
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struct WD33C93_hostdata wh;
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struct a2091_scsiregs *regs;
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};
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static irqreturn_t a2091_intr(int irq, void *data)
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{
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struct Scsi_Host *instance = data;
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struct a2091_hostdata *hdata = shost_priv(instance);
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unsigned int status = hdata->regs->ISTR;
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unsigned long flags;
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if (!(status & (ISTR_INT_F | ISTR_INT_P)) || !(status & ISTR_INTS))
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return IRQ_NONE;
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spin_lock_irqsave(instance->host_lock, flags);
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wd33c93_intr(instance);
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spin_unlock_irqrestore(instance->host_lock, flags);
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return IRQ_HANDLED;
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}
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static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
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{
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struct Scsi_Host *instance = cmd->device->host;
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struct a2091_hostdata *hdata = shost_priv(instance);
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struct WD33C93_hostdata *wh = &hdata->wh;
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struct a2091_scsiregs *regs = hdata->regs;
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unsigned short cntr = CNTR_PDMD | CNTR_INTEN;
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unsigned long addr = virt_to_bus(cmd->SCp.ptr);
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/* don't allow DMA if the physical address is bad */
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if (addr & A2091_XFER_MASK) {
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wh->dma_bounce_len = (cmd->SCp.this_residual + 511) & ~0x1ff;
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wh->dma_bounce_buffer = kmalloc(wh->dma_bounce_len,
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GFP_KERNEL);
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/* can't allocate memory; use PIO */
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if (!wh->dma_bounce_buffer) {
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wh->dma_bounce_len = 0;
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return 1;
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}
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/* get the physical address of the bounce buffer */
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addr = virt_to_bus(wh->dma_bounce_buffer);
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/* the bounce buffer may not be in the first 16M of physmem */
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if (addr & A2091_XFER_MASK) {
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/* we could use chipmem... maybe later */
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kfree(wh->dma_bounce_buffer);
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wh->dma_bounce_buffer = NULL;
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wh->dma_bounce_len = 0;
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return 1;
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}
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if (!dir_in) {
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/* copy to bounce buffer for a write */
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memcpy(wh->dma_bounce_buffer, cmd->SCp.ptr,
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cmd->SCp.this_residual);
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}
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}
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/* setup dma direction */
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if (!dir_in)
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cntr |= CNTR_DDIR;
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/* remember direction */
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wh->dma_dir = dir_in;
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regs->CNTR = cntr;
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/* setup DMA *physical* address */
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regs->ACR = addr;
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if (dir_in) {
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/* invalidate any cache */
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cache_clear(addr, cmd->SCp.this_residual);
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} else {
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/* push any dirty cache */
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cache_push(addr, cmd->SCp.this_residual);
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}
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/* start DMA */
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regs->ST_DMA = 1;
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/* return success */
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return 0;
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}
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static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
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int status)
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{
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struct a2091_hostdata *hdata = shost_priv(instance);
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struct WD33C93_hostdata *wh = &hdata->wh;
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struct a2091_scsiregs *regs = hdata->regs;
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/* disable SCSI interrupts */
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unsigned short cntr = CNTR_PDMD;
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if (!wh->dma_dir)
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cntr |= CNTR_DDIR;
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/* disable SCSI interrupts */
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regs->CNTR = cntr;
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/* flush if we were reading */
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if (wh->dma_dir) {
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regs->FLUSH = 1;
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while (!(regs->ISTR & ISTR_FE_FLG))
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;
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}
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/* clear a possible interrupt */
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regs->CINT = 1;
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/* stop DMA */
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regs->SP_DMA = 1;
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/* restore the CONTROL bits (minus the direction flag) */
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regs->CNTR = CNTR_PDMD | CNTR_INTEN;
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/* copy from a bounce buffer, if necessary */
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if (status && wh->dma_bounce_buffer) {
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if (wh->dma_dir)
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memcpy(SCpnt->SCp.ptr, wh->dma_bounce_buffer,
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SCpnt->SCp.this_residual);
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kfree(wh->dma_bounce_buffer);
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wh->dma_bounce_buffer = NULL;
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wh->dma_bounce_len = 0;
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}
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}
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static int a2091_bus_reset(struct scsi_cmnd *cmd)
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{
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struct Scsi_Host *instance = cmd->device->host;
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/* FIXME perform bus-specific reset */
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/* FIXME 2: kill this function, and let midlayer fall back
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to the same action, calling wd33c93_host_reset() */
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spin_lock_irq(instance->host_lock);
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wd33c93_host_reset(cmd);
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spin_unlock_irq(instance->host_lock);
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return SUCCESS;
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}
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static struct scsi_host_template a2091_scsi_template = {
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.module = THIS_MODULE,
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.name = "Commodore A2091/A590 SCSI",
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.proc_info = wd33c93_proc_info,
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.proc_name = "A2901",
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.queuecommand = wd33c93_queuecommand,
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.eh_abort_handler = wd33c93_abort,
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.eh_bus_reset_handler = a2091_bus_reset,
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.eh_host_reset_handler = wd33c93_host_reset,
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.can_queue = CAN_QUEUE,
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.this_id = 7,
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.sg_tablesize = SG_ALL,
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.cmd_per_lun = CMD_PER_LUN,
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.use_clustering = DISABLE_CLUSTERING
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};
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static int __devinit a2091_probe(struct zorro_dev *z,
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const struct zorro_device_id *ent)
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{
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struct Scsi_Host *instance;
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int error;
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struct a2091_scsiregs *regs;
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wd33c93_regs wdregs;
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struct a2091_hostdata *hdata;
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if (!request_mem_region(z->resource.start, 256, "wd33c93"))
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return -EBUSY;
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instance = scsi_host_alloc(&a2091_scsi_template,
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sizeof(struct a2091_hostdata));
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if (!instance) {
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error = -ENOMEM;
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goto fail_alloc;
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}
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instance->irq = IRQ_AMIGA_PORTS;
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instance->unique_id = z->slotaddr;
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regs = (struct a2091_scsiregs *)ZTWO_VADDR(z->resource.start);
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regs->DAWR = DAWR_A2091;
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wdregs.SASR = ®s->SASR;
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wdregs.SCMD = ®s->SCMD;
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hdata = shost_priv(instance);
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hdata->wh.no_sync = 0xff;
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hdata->wh.fast = 0;
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hdata->wh.dma_mode = CTRL_DMA;
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hdata->regs = regs;
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wd33c93_init(instance, wdregs, dma_setup, dma_stop, WD33C93_FS_8_10);
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error = request_irq(IRQ_AMIGA_PORTS, a2091_intr, IRQF_SHARED,
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"A2091 SCSI", instance);
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if (error)
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goto fail_irq;
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regs->CNTR = CNTR_PDMD | CNTR_INTEN;
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error = scsi_add_host(instance, NULL);
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if (error)
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goto fail_host;
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zorro_set_drvdata(z, instance);
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scsi_scan_host(instance);
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return 0;
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fail_host:
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free_irq(IRQ_AMIGA_PORTS, instance);
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fail_irq:
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scsi_host_put(instance);
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fail_alloc:
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release_mem_region(z->resource.start, 256);
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return error;
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}
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static void __devexit a2091_remove(struct zorro_dev *z)
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{
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struct Scsi_Host *instance = zorro_get_drvdata(z);
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struct a2091_hostdata *hdata = shost_priv(instance);
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hdata->regs->CNTR = 0;
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scsi_remove_host(instance);
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free_irq(IRQ_AMIGA_PORTS, instance);
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scsi_host_put(instance);
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release_mem_region(z->resource.start, 256);
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}
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static struct zorro_device_id a2091_zorro_tbl[] __devinitdata = {
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{ ZORRO_PROD_CBM_A590_A2091_1 },
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{ ZORRO_PROD_CBM_A590_A2091_2 },
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{ 0 }
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};
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MODULE_DEVICE_TABLE(zorro, a2091_zorro_tbl);
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static struct zorro_driver a2091_driver = {
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.name = "a2091",
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.id_table = a2091_zorro_tbl,
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.probe = a2091_probe,
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.remove = __devexit_p(a2091_remove),
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};
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static int __init a2091_init(void)
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{
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return zorro_register_driver(&a2091_driver);
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}
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module_init(a2091_init);
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static void __exit a2091_exit(void)
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{
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zorro_unregister_driver(&a2091_driver);
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}
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module_exit(a2091_exit);
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MODULE_DESCRIPTION("Commodore A2091/A590 SCSI");
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MODULE_LICENSE("GPL");
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