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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [drivers/] [scsi/] [a2091.c] - Rev 1772
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#include <linux/types.h> #include <linux/mm.h> #include <linux/blk.h> #include <linux/version.h> #include <asm/page.h> #include <asm/pgtable.h> #include <asm/bootinfo.h> #include <asm/amigaints.h> #include <asm/amigahw.h> #include <asm/zorro.h> #include <asm/irq.h> #include "scsi.h" #include "hosts.h" #include "wd33c93.h" #include "a2091.h" #include<linux/stat.h> struct proc_dir_entry proc_scsi_a2091 = { PROC_SCSI_A2091, 5, "A2091", S_IFDIR | S_IRUGO | S_IXUGO, 2 }; #define DMA(ptr) ((a2091_scsiregs *)((ptr)->base)) #define HDATA(ptr) ((struct WD33C93_hostdata *)((ptr)->hostdata)) static struct Scsi_Host *first_instance = NULL; static Scsi_Host_Template *a2091_template; static void a2091_intr (int irq, struct pt_regs *fp, void *dummy) { unsigned int status; struct Scsi_Host *instance; for (instance = first_instance; instance && instance->hostt == a2091_template; instance = instance->next) { status = DMA(instance)->ISTR; if (!(status & (ISTR_INT_F|ISTR_INT_P))) continue; if (status & ISTR_INTS) { /* disable PORTS interrupt */ custom.intena = IF_PORTS; wd33c93_intr (instance); /* enable PORTS interrupt */ custom.intena = IF_SETCLR | IF_PORTS; } } } static int dma_setup (Scsi_Cmnd *cmd, int dir_in) { unsigned short cntr = CNTR_PDMD | CNTR_INTEN; unsigned long addr = VTOP(cmd->SCp.ptr); struct Scsi_Host *instance = cmd->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 = scsi_malloc (HDATA(instance)->dma_bounce_len); /* 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 = VTOP(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 */ scsi_free (HDATA(instance)->dma_bounce_buffer, HDATA(instance)->dma_bounce_len); 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->host)->dma_dir = dir_in; DMA(cmd->host)->CNTR = cntr; /* setup DMA *physical* address */ DMA(cmd->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->host)->ST_DMA = 1; /* return success */ return 0; } static void dma_stop (struct Scsi_Host *instance, 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); scsi_free (HDATA(instance)->dma_bounce_buffer, HDATA(instance)->dma_bounce_len); 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); scsi_free (HDATA(instance)->dma_bounce_buffer, HDATA(instance)->dma_bounce_len); HDATA(instance)->dma_bounce_buffer = NULL; HDATA(instance)->dma_bounce_len = 0; } } } int a2091_detect(Scsi_Host_Template *tpnt) { static unsigned char called = 0; struct Scsi_Host *instance; int i, manuf, product, num_a2091 = 0; caddr_t address; if (!MACH_IS_AMIGA || called) return 0; called = 1; tpnt->proc_dir = &proc_scsi_a2091; for (i = 0; i < boot_info.bi_amiga.num_autocon; i++) { manuf = boot_info.bi_amiga.autocon[i].cd_Rom.er_Manufacturer; product = boot_info.bi_amiga.autocon[i].cd_Rom.er_Product; if (manuf == MANUF_COMMODORE && (product == PROD_A2091 || product == PROD_A590)) { address = boot_info.bi_amiga.autocon[i].cd_BoardAddr; instance = scsi_register (tpnt, sizeof (struct WD33C93_hostdata)); instance->base = (unsigned char *)ZTWO_VADDR(address); DMA(instance)->DAWR = DAWR_A2091; wd33c93_init(instance, (wd33c93_regs *)&(DMA(instance)->SASR), dma_setup, dma_stop, WD33C93_FS_8_10); if (num_a2091++ == 0) { first_instance = instance; a2091_template = instance->hostt; add_isr(IRQ_AMIGA_PORTS, a2091_intr, 0, NULL, "A2091 SCSI"); } DMA(instance)->CNTR = CNTR_PDMD | CNTR_INTEN; #if 0 /* The Zorro stuff is not totally integrated yet ! */ boot_info.bi_amiga.autocon_configured |= 1<<i; #endif } } return num_a2091; }
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