mirror of
https://github.com/edk2-porting/linux-next.git
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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>
298 lines
7.2 KiB
C
298 lines
7.2 KiB
C
#include <linux/types.h>
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#include <linux/mm.h>
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#include <linux/ioport.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.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 "a3000.h"
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struct a3000_hostdata {
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struct WD33C93_hostdata wh;
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struct a3000_scsiregs *regs;
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};
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static irqreturn_t a3000_intr(int irq, void *data)
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{
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struct Scsi_Host *instance = data;
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struct a3000_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_P))
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return IRQ_NONE;
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if (status & ISTR_INTS) {
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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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pr_warning("Non-serviced A3000 SCSI-interrupt? ISTR = %02x\n", status);
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return IRQ_NONE;
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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 a3000_hostdata *hdata = shost_priv(instance);
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struct WD33C93_hostdata *wh = &hdata->wh;
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struct a3000_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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/*
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* if the physical address has the wrong alignment, or if
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* physical address is bad, or if it is a write and at the
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* end of a physical memory chunk, then allocate a bounce
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* buffer
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*/
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if (addr & A3000_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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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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addr = virt_to_bus(wh->dma_bounce_buffer);
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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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mb(); /* make sure setup is completed */
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regs->ST_DMA = 1;
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mb(); /* make sure DMA has started before next IO */
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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 a3000_hostdata *hdata = shost_priv(instance);
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struct WD33C93_hostdata *wh = &hdata->wh;
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struct a3000_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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regs->CNTR = cntr;
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mb(); /* make sure CNTR is updated before next IO */
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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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mb(); /* don't allow prefetch */
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while (!(regs->ISTR & ISTR_FE_FLG))
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barrier();
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mb(); /* no IO until FLUSH is done */
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}
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/* clear a possible interrupt */
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/* I think that this CINT is only necessary if you are
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* using the terminal count features. HM 7 Mar 1994
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*/
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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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mb(); /* make sure DMA is stopped before next IO */
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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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mb(); /* make sure CNTR is updated before next IO */
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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 (SCpnt) {
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if (wh->dma_dir && SCpnt)
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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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} else {
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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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}
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static int a3000_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 entire function, which should
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cause mid-layer to call wd33c93_host_reset anyway? */
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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 amiga_a3000_scsi_template = {
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.module = THIS_MODULE,
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.name = "Amiga 3000 built-in SCSI",
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.proc_info = wd33c93_proc_info,
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.proc_name = "A3000",
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.queuecommand = wd33c93_queuecommand,
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.eh_abort_handler = wd33c93_abort,
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.eh_bus_reset_handler = a3000_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 = ENABLE_CLUSTERING
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};
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static int __init amiga_a3000_scsi_probe(struct platform_device *pdev)
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{
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struct resource *res;
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struct Scsi_Host *instance;
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int error;
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struct a3000_scsiregs *regs;
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wd33c93_regs wdregs;
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struct a3000_hostdata *hdata;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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if (!res)
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return -ENODEV;
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if (!request_mem_region(res->start, resource_size(res), "wd33c93"))
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return -EBUSY;
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instance = scsi_host_alloc(&amiga_a3000_scsi_template,
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sizeof(struct a3000_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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regs = (struct a3000_scsiregs *)ZTWO_VADDR(res->start);
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regs->DAWR = DAWR_A3000;
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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_12_15);
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error = request_irq(IRQ_AMIGA_PORTS, a3000_intr, IRQF_SHARED,
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"A3000 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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platform_set_drvdata(pdev, 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(res->start, resource_size(res));
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return error;
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}
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static int __exit amiga_a3000_scsi_remove(struct platform_device *pdev)
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{
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struct Scsi_Host *instance = platform_get_drvdata(pdev);
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struct a3000_hostdata *hdata = shost_priv(instance);
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struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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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(res->start, resource_size(res));
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return 0;
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}
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static struct platform_driver amiga_a3000_scsi_driver = {
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.remove = __exit_p(amiga_a3000_scsi_remove),
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.driver = {
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.name = "amiga-a3000-scsi",
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.owner = THIS_MODULE,
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},
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};
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static int __init amiga_a3000_scsi_init(void)
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{
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return platform_driver_probe(&amiga_a3000_scsi_driver,
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amiga_a3000_scsi_probe);
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}
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module_init(amiga_a3000_scsi_init);
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static void __exit amiga_a3000_scsi_exit(void)
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{
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platform_driver_unregister(&amiga_a3000_scsi_driver);
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}
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module_exit(amiga_a3000_scsi_exit);
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MODULE_DESCRIPTION("Amiga 3000 built-in SCSI");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:amiga-a3000-scsi");
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