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481 lines
12 KiB
481 lines
12 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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#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/amigaints.h> |
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#include <asm/amigahw.h> |
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#include <scsi/scsi.h> |
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#include <scsi/scsi_cmnd.h> |
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#include <scsi/scsi_device.h> |
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#include <scsi/scsi_eh.h> |
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#include <scsi/scsi_tcq.h> |
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#include "wd33c93.h" |
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#include "gvp11.h" |
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#define CHECK_WD33C93 |
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struct gvp11_hostdata { |
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struct WD33C93_hostdata wh; |
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struct gvp11_scsiregs *regs; |
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struct device *dev; |
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}; |
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#define DMA_DIR(d) ((d == DATA_OUT_DIR) ? DMA_TO_DEVICE : DMA_FROM_DEVICE) |
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#define TO_DMA_MASK(m) (~((unsigned long long)m & 0xffffffff)) |
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static irqreturn_t gvp11_intr(int irq, void *data) |
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{ |
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struct Scsi_Host *instance = data; |
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struct gvp11_hostdata *hdata = shost_priv(instance); |
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unsigned int status = hdata->regs->CNTR; |
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unsigned long flags; |
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if (!(status & GVP11_DMAC_INT_PENDING)) |
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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 gvp11_xfer_mask = 0; |
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void gvp11_setup(char *str, int *ints) |
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{ |
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gvp11_xfer_mask = ints[1]; |
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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_pointer *scsi_pointer = WD33C93_scsi_pointer(cmd); |
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unsigned long len = scsi_pointer->this_residual; |
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struct Scsi_Host *instance = cmd->device->host; |
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struct gvp11_hostdata *hdata = shost_priv(instance); |
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struct WD33C93_hostdata *wh = &hdata->wh; |
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struct gvp11_scsiregs *regs = hdata->regs; |
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unsigned short cntr = GVP11_DMAC_INT_ENABLE; |
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dma_addr_t addr; |
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int bank_mask; |
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static int scsi_alloc_out_of_range = 0; |
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addr = dma_map_single(hdata->dev, scsi_pointer->ptr, |
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len, DMA_DIR(dir_in)); |
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if (dma_mapping_error(hdata->dev, addr)) { |
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dev_warn(hdata->dev, "cannot map SCSI data block %p\n", |
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scsi_pointer->ptr); |
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return 1; |
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} |
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scsi_pointer->dma_handle = addr; |
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/* use bounce buffer if the physical address is bad */ |
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if (addr & wh->dma_xfer_mask) { |
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/* drop useless mapping */ |
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dma_unmap_single(hdata->dev, scsi_pointer->dma_handle, |
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scsi_pointer->this_residual, |
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DMA_DIR(dir_in)); |
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scsi_pointer->dma_handle = (dma_addr_t) NULL; |
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wh->dma_bounce_len = (scsi_pointer->this_residual + 511) & ~0x1ff; |
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if (!scsi_alloc_out_of_range) { |
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wh->dma_bounce_buffer = |
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kmalloc(wh->dma_bounce_len, GFP_KERNEL); |
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wh->dma_buffer_pool = BUF_SCSI_ALLOCED; |
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} |
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if (scsi_alloc_out_of_range || |
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!wh->dma_bounce_buffer) { |
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wh->dma_bounce_buffer = |
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amiga_chip_alloc(wh->dma_bounce_len, |
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"GVP II SCSI Bounce Buffer"); |
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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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wh->dma_buffer_pool = BUF_CHIP_ALLOCED; |
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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, scsi_pointer->ptr, |
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scsi_pointer->this_residual); |
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} |
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if (wh->dma_buffer_pool == BUF_SCSI_ALLOCED) { |
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/* will flush/invalidate cache for us */ |
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addr = dma_map_single(hdata->dev, |
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wh->dma_bounce_buffer, |
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wh->dma_bounce_len, |
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DMA_DIR(dir_in)); |
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/* can't map buffer; use PIO */ |
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if (dma_mapping_error(hdata->dev, addr)) { |
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dev_warn(hdata->dev, |
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"cannot map bounce buffer %p\n", |
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wh->dma_bounce_buffer); |
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return 1; |
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} |
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} |
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if (addr & wh->dma_xfer_mask) { |
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/* drop useless mapping */ |
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dma_unmap_single(hdata->dev, scsi_pointer->dma_handle, |
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scsi_pointer->this_residual, |
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DMA_DIR(dir_in)); |
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/* fall back to Chip RAM if address out of range */ |
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if (wh->dma_buffer_pool == BUF_SCSI_ALLOCED) { |
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kfree(wh->dma_bounce_buffer); |
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scsi_alloc_out_of_range = 1; |
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} else { |
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amiga_chip_free(wh->dma_bounce_buffer); |
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} |
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wh->dma_bounce_buffer = |
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amiga_chip_alloc(wh->dma_bounce_len, |
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"GVP II SCSI Bounce Buffer"); |
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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, scsi_pointer->ptr, |
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scsi_pointer->this_residual); |
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} |
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/* chip RAM can be mapped to phys. address directly */ |
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addr = virt_to_phys(wh->dma_bounce_buffer); |
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/* no need to flush/invalidate cache */ |
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wh->dma_buffer_pool = BUF_CHIP_ALLOCED; |
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} |
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/* finally, have OK mapping (punted for PIO else) */ |
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scsi_pointer->dma_handle = addr; |
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} |
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/* setup dma direction */ |
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if (!dir_in) |
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cntr |= GVP11_DMAC_DIR_WRITE; |
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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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/* no more cache flush here - dma_map_single() takes care */ |
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bank_mask = (~wh->dma_xfer_mask >> 18) & 0x01c0; |
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if (bank_mask) |
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regs->BANK = bank_mask & (addr >> 18); |
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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 scsi_pointer *scsi_pointer = WD33C93_scsi_pointer(SCpnt); |
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struct gvp11_hostdata *hdata = shost_priv(instance); |
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struct WD33C93_hostdata *wh = &hdata->wh; |
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struct gvp11_scsiregs *regs = hdata->regs; |
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/* stop DMA */ |
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regs->SP_DMA = 1; |
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/* remove write bit from CONTROL bits */ |
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regs->CNTR = GVP11_DMAC_INT_ENABLE; |
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if (wh->dma_buffer_pool == BUF_SCSI_ALLOCED) |
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dma_unmap_single(hdata->dev, scsi_pointer->dma_handle, |
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scsi_pointer->this_residual, |
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DMA_DIR(wh->dma_dir)); |
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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 && SCpnt) |
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memcpy(scsi_pointer->ptr, wh->dma_bounce_buffer, |
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scsi_pointer->this_residual); |
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if (wh->dma_buffer_pool == BUF_SCSI_ALLOCED) |
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kfree(wh->dma_bounce_buffer); |
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else |
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amiga_chip_free(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 struct scsi_host_template gvp11_scsi_template = { |
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.module = THIS_MODULE, |
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.name = "GVP Series II SCSI", |
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.show_info = wd33c93_show_info, |
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.write_info = wd33c93_write_info, |
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.proc_name = "GVP11", |
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.queuecommand = wd33c93_queuecommand, |
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.eh_abort_handler = wd33c93_abort, |
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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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.dma_boundary = PAGE_SIZE - 1, |
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.cmd_size = sizeof(struct scsi_pointer), |
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}; |
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static int check_wd33c93(struct gvp11_scsiregs *regs) |
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{ |
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#ifdef CHECK_WD33C93 |
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volatile unsigned char *sasr_3393, *scmd_3393; |
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unsigned char save_sasr; |
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unsigned char q, qq; |
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/* |
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* These darn GVP boards are a problem - it can be tough to tell |
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* whether or not they include a SCSI controller. This is the |
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* ultimate Yet-Another-GVP-Detection-Hack in that it actually |
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* probes for a WD33c93 chip: If we find one, it's extremely |
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* likely that this card supports SCSI, regardless of Product_ |
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* Code, Board_Size, etc. |
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*/ |
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/* Get pointers to the presumed register locations and save contents */ |
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sasr_3393 = ®s->SASR; |
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scmd_3393 = ®s->SCMD; |
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save_sasr = *sasr_3393; |
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/* First test the AuxStatus Reg */ |
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q = *sasr_3393; /* read it */ |
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if (q & 0x08) /* bit 3 should always be clear */ |
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return -ENODEV; |
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*sasr_3393 = WD_AUXILIARY_STATUS; /* setup indirect address */ |
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if (*sasr_3393 == WD_AUXILIARY_STATUS) { /* shouldn't retain the write */ |
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*sasr_3393 = save_sasr; /* Oops - restore this byte */ |
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return -ENODEV; |
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} |
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if (*sasr_3393 != q) { /* should still read the same */ |
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*sasr_3393 = save_sasr; /* Oops - restore this byte */ |
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return -ENODEV; |
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} |
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if (*scmd_3393 != q) /* and so should the image at 0x1f */ |
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return -ENODEV; |
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/* |
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* Ok, we probably have a wd33c93, but let's check a few other places |
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* for good measure. Make sure that this works for both 'A and 'B |
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* chip versions. |
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*/ |
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*sasr_3393 = WD_SCSI_STATUS; |
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q = *scmd_3393; |
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*sasr_3393 = WD_SCSI_STATUS; |
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*scmd_3393 = ~q; |
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*sasr_3393 = WD_SCSI_STATUS; |
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qq = *scmd_3393; |
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*sasr_3393 = WD_SCSI_STATUS; |
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*scmd_3393 = q; |
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if (qq != q) /* should be read only */ |
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return -ENODEV; |
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*sasr_3393 = 0x1e; /* this register is unimplemented */ |
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q = *scmd_3393; |
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*sasr_3393 = 0x1e; |
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*scmd_3393 = ~q; |
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*sasr_3393 = 0x1e; |
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qq = *scmd_3393; |
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*sasr_3393 = 0x1e; |
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*scmd_3393 = q; |
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if (qq != q || qq != 0xff) /* should be read only, all 1's */ |
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return -ENODEV; |
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*sasr_3393 = WD_TIMEOUT_PERIOD; |
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q = *scmd_3393; |
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*sasr_3393 = WD_TIMEOUT_PERIOD; |
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*scmd_3393 = ~q; |
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*sasr_3393 = WD_TIMEOUT_PERIOD; |
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qq = *scmd_3393; |
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*sasr_3393 = WD_TIMEOUT_PERIOD; |
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*scmd_3393 = q; |
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if (qq != (~q & 0xff)) /* should be read/write */ |
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return -ENODEV; |
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#endif /* CHECK_WD33C93 */ |
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return 0; |
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} |
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static int gvp11_probe(struct zorro_dev *z, const struct zorro_device_id *ent) |
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{ |
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struct Scsi_Host *instance; |
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unsigned long address; |
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int error; |
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unsigned int epc; |
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unsigned int default_dma_xfer_mask; |
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struct gvp11_hostdata *hdata; |
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struct gvp11_scsiregs *regs; |
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wd33c93_regs wdregs; |
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default_dma_xfer_mask = ent->driver_data; |
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if (dma_set_mask_and_coherent(&z->dev, |
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TO_DMA_MASK(default_dma_xfer_mask))) { |
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dev_warn(&z->dev, "cannot use DMA mask %llx\n", |
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TO_DMA_MASK(default_dma_xfer_mask)); |
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return -ENODEV; |
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} |
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/* |
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* Rumors state that some GVP ram boards use the same product |
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* code as the SCSI controllers. Therefore if the board-size |
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* is not 64KB we assume it is a ram board and bail out. |
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*/ |
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if (zorro_resource_len(z) != 0x10000) |
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return -ENODEV; |
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address = z->resource.start; |
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if (!request_mem_region(address, 256, "wd33c93")) |
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return -EBUSY; |
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regs = ZTWO_VADDR(address); |
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error = check_wd33c93(regs); |
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if (error) |
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goto fail_check_or_alloc; |
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instance = scsi_host_alloc(&gvp11_scsi_template, |
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sizeof(struct gvp11_hostdata)); |
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if (!instance) { |
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error = -ENOMEM; |
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goto fail_check_or_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->secret2 = 1; |
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regs->secret1 = 0; |
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regs->secret3 = 15; |
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while (regs->CNTR & GVP11_DMAC_BUSY) |
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; |
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regs->CNTR = 0; |
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regs->BANK = 0; |
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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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if (gvp11_xfer_mask) { |
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hdata->wh.dma_xfer_mask = gvp11_xfer_mask; |
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if (dma_set_mask_and_coherent(&z->dev, |
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TO_DMA_MASK(gvp11_xfer_mask))) { |
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dev_warn(&z->dev, "cannot use DMA mask %llx\n", |
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TO_DMA_MASK(gvp11_xfer_mask)); |
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error = -ENODEV; |
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goto fail_check_or_alloc; |
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} |
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} else |
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hdata->wh.dma_xfer_mask = default_dma_xfer_mask; |
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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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/* |
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* Check for 14MHz SCSI clock |
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*/ |
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epc = *(unsigned short *)(ZTWO_VADDR(address) + 0x8000); |
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wd33c93_init(instance, wdregs, dma_setup, dma_stop, |
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(epc & GVP_SCSICLKMASK) ? WD33C93_FS_8_10 |
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: WD33C93_FS_12_15); |
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error = request_irq(IRQ_AMIGA_PORTS, gvp11_intr, IRQF_SHARED, |
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"GVP11 SCSI", instance); |
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if (error) |
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goto fail_irq; |
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regs->CNTR = GVP11_DMAC_INT_ENABLE; |
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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_check_or_alloc: |
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release_mem_region(address, 256); |
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return error; |
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} |
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static void gvp11_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 gvp11_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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/* |
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* This should (hopefully) be the correct way to identify |
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* all the different GVP SCSI controllers (except for the |
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* SERIES I though). |
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*/ |
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static struct zorro_device_id gvp11_zorro_tbl[] = { |
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{ ZORRO_PROD_GVP_COMBO_030_R3_SCSI, ~0x00ffffff }, |
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{ ZORRO_PROD_GVP_SERIES_II, ~0x00ffffff }, |
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{ ZORRO_PROD_GVP_GFORCE_030_SCSI, ~0x01ffffff }, |
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{ ZORRO_PROD_GVP_A530_SCSI, ~0x01ffffff }, |
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{ ZORRO_PROD_GVP_COMBO_030_R4_SCSI, ~0x01ffffff }, |
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{ ZORRO_PROD_GVP_A1291, ~0x07ffffff }, |
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{ ZORRO_PROD_GVP_GFORCE_040_SCSI_1, ~0x07ffffff }, |
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{ 0 } |
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}; |
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MODULE_DEVICE_TABLE(zorro, gvp11_zorro_tbl); |
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static struct zorro_driver gvp11_driver = { |
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.name = "gvp11", |
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.id_table = gvp11_zorro_tbl, |
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.probe = gvp11_probe, |
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.remove = gvp11_remove, |
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}; |
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static int __init gvp11_init(void) |
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{ |
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return zorro_register_driver(&gvp11_driver); |
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} |
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module_init(gvp11_init); |
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static void __exit gvp11_exit(void) |
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{ |
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zorro_unregister_driver(&gvp11_driver); |
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} |
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module_exit(gvp11_exit); |
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MODULE_DESCRIPTION("GVP Series II SCSI"); |
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MODULE_LICENSE("GPL");
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