#include <linux/types.h> #include <linux/mm.h> #include <linux/blkdev.h> #include <linux/init.h> #include <linux/interrupt.h> #include <asm/setup.h> #include <asm/page.h> #include <asm/pgtable.h> #include <asm/amigaints.h> #include <asm/amigahw.h> #include <linux/zorro.h> #include <asm/irq.h> #include <linux/spinlock.h> #include "scsi.h" #include <scsi/scsi_host.h> #include "wd33c93.h" #include "a2091.h" #include<linux/stat.h> #define DMA(ptr) ((a2091_scsiregs *)((ptr)->base)) #define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata)) static irqreturn_t a2091_intr (int irq, void *_instance) { unsigned long flags; unsigned int status; struct Scsi_Host *instance = (struct Scsi_Host *)_instance; status = DMA(instance)->ISTR; if (!(status & (ISTR_INT_F|ISTR_INT_P)) || !(status & ISTR_INTS)) return IRQ_NONE; spin_lock_irqsave(instance->host_lock, flags); wd33c93_intr(instance); spin_unlock_irqrestore(instance->host_lock, flags); return IRQ_HANDLED; } static int dma_setup(struct scsi_cmnd *cmd, int dir_in) { unsigned short cntr = CNTR_PDMD | CNTR_INTEN; unsigned long addr = virt_to_bus(cmd->SCp.ptr); struct Scsi_Host *instance = cmd->device->host; /* don't allow DMA if the physical address is bad */ if (addr & A2091_XFER_MASK || (!dir_in && mm_end_of_chunk (addr, cmd->SCp.this_residual))) { HDATA(instance)->dma_bounce_len = (cmd->SCp.this_residual + 511) & ~0x1ff; HDATA(instance)->dma_bounce_buffer = kmalloc (HDATA(instance)->dma_bounce_len, GFP_KERNEL); /* can't allocate memory; use PIO */ if (!HDATA(instance)->dma_bounce_buffer) { HDATA(instance)->dma_bounce_len = 0; return 1; } /* get the physical address of the bounce buffer */ addr = virt_to_bus(HDATA(instance)->dma_bounce_buffer); /* the bounce buffer may not be in the first 16M of physmem */ if (addr & A2091_XFER_MASK) { /* we could use chipmem... maybe later */ kfree (HDATA(instance)->dma_bounce_buffer); HDATA(instance)->dma_bounce_buffer = NULL; HDATA(instance)->dma_bounce_len = 0; return 1; } if (!dir_in) { /* copy to bounce buffer for a write */ if (cmd->use_sg) #if 0 panic ("scsi%ddma: incomplete s/g support", instance->host_no); #else memcpy (HDATA(instance)->dma_bounce_buffer, cmd->SCp.ptr, cmd->SCp.this_residual); #endif else memcpy (HDATA(instance)->dma_bounce_buffer, cmd->request_buffer, cmd->request_bufflen); } } /* setup dma direction */ if (!dir_in) cntr |= CNTR_DDIR; /* remember direction */ HDATA(cmd->device->host)->dma_dir = dir_in; DMA(cmd->device->host)->CNTR = cntr; /* setup DMA *physical* address */ DMA(cmd->device->host)->ACR = addr; if (dir_in){ /* invalidate any cache */ cache_clear (addr, cmd->SCp.this_residual); }else{ /* push any dirty cache */ cache_push (addr, cmd->SCp.this_residual); } /* start DMA */ DMA(cmd->device->host)->ST_DMA = 1; /* return success */ return 0; } static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt, int status) { /* disable SCSI interrupts */ unsigned short cntr = CNTR_PDMD; if (!HDATA(instance)->dma_dir) cntr |= CNTR_DDIR; /* disable SCSI interrupts */ DMA(instance)->CNTR = cntr; /* flush if we were reading */ if (HDATA(instance)->dma_dir) { DMA(instance)->FLUSH = 1; while (!(DMA(instance)->ISTR & ISTR_FE_FLG)) ; } /* clear a possible interrupt */ DMA(instance)->CINT = 1; /* stop DMA */ DMA(instance)->SP_DMA = 1; /* restore the CONTROL bits (minus the direction flag) */ DMA(instance)->CNTR = CNTR_PDMD | CNTR_INTEN; /* copy from a bounce buffer, if necessary */ if (status && HDATA(instance)->dma_bounce_buffer) { if (SCpnt && SCpnt->use_sg) { #if 0 panic ("scsi%d: incomplete s/g support", instance->host_no); #else if( HDATA(instance)->dma_dir ) memcpy (SCpnt->SCp.ptr, HDATA(instance)->dma_bounce_buffer, SCpnt->SCp.this_residual); kfree (HDATA(instance)->dma_bounce_buffer); HDATA(instance)->dma_bounce_buffer = NULL; HDATA(instance)->dma_bounce_len = 0; #endif } else { if (HDATA(instance)->dma_dir && SCpnt) memcpy (SCpnt->request_buffer, HDATA(instance)->dma_bounce_buffer, SCpnt->request_bufflen); kfree (HDATA(instance)->dma_bounce_buffer); HDATA(instance)->dma_bounce_buffer = NULL; HDATA(instance)->dma_bounce_len = 0; } } } int __init a2091_detect(struct scsi_host_template *tpnt) { static unsigned char called = 0; struct Scsi_Host *instance; unsigned long address; struct zorro_dev *z = NULL; wd33c93_regs regs; int num_a2091 = 0; if (!MACH_IS_AMIGA || called) return 0; called = 1; tpnt->proc_name = "A2091"; tpnt->proc_info = &wd33c93_proc_info; while ((z = zorro_find_device(ZORRO_WILDCARD, z))) { if (z->id != ZORRO_PROD_CBM_A590_A2091_1 && z->id != ZORRO_PROD_CBM_A590_A2091_2) continue; address = z->resource.start; if (!request_mem_region(address, 256, "wd33c93")) continue; instance = scsi_register (tpnt, sizeof (struct WD33C93_hostdata)); if (instance == NULL) { release_mem_region(address, 256); continue; } instance->base = ZTWO_VADDR(address); instance->irq = IRQ_AMIGA_PORTS; instance->unique_id = z->slotaddr; DMA(instance)->DAWR = DAWR_A2091; regs.SASR = &(DMA(instance)->SASR); regs.SCMD = &(DMA(instance)->SCMD); wd33c93_init(instance, regs, dma_setup, dma_stop, WD33C93_FS_8_10); request_irq(IRQ_AMIGA_PORTS, a2091_intr, IRQF_SHARED, "A2091 SCSI", instance); DMA(instance)->CNTR = CNTR_PDMD | CNTR_INTEN; num_a2091++; } return num_a2091; } static int a2091_bus_reset(struct scsi_cmnd *cmd) { /* FIXME perform bus-specific reset */ /* FIXME 2: kill this function, and let midlayer fall back to the same action, calling wd33c93_host_reset() */ spin_lock_irq(cmd->device->host->host_lock); wd33c93_host_reset(cmd); spin_unlock_irq(cmd->device->host->host_lock); return SUCCESS; } #define HOSTS_C static struct scsi_host_template driver_template = { .proc_name = "A2901", .name = "Commodore A2091/A590 SCSI", .detect = a2091_detect, .release = a2091_release, .queuecommand = wd33c93_queuecommand, .eh_abort_handler = wd33c93_abort, .eh_bus_reset_handler = a2091_bus_reset, .eh_host_reset_handler = wd33c93_host_reset, .can_queue = CAN_QUEUE, .this_id = 7, .sg_tablesize = SG_ALL, .cmd_per_lun = CMD_PER_LUN, .use_clustering = DISABLE_CLUSTERING }; #include "scsi_module.c" int a2091_release(struct Scsi_Host *instance) { #ifdef MODULE DMA(instance)->CNTR = 0; release_mem_region(ZTWO_PADDR(instance->base), 256); free_irq(IRQ_AMIGA_PORTS, instance); wd33c93_release(); #endif return 1; } MODULE_LICENSE("GPL");